11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 417df302f7SChuck Lever #include <linux/ratelimit.h> 4268e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 435976687aSJeff Layton #include <linux/sunrpc/addr.h> 4487545899SDaniel Borkmann #include <linux/jhash.h> 45169319f1SJ. Bruce Fields #include <linux/string_helpers.h> 469a74af21SBoaz Harrosh #include "xdr4.h" 4706b332a5SJ. Bruce Fields #include "xdr4cb.h" 480a3adadeSJ. Bruce Fields #include "vfs.h" 49bfa4b365SJ. Bruce Fields #include "current_stateid.h" 501da177e4SLinus Torvalds 515e1533c7SStanislav Kinsbursky #include "netns.h" 529cf514ccSChristoph Hellwig #include "pnfs.h" 53fd4f83fdSJeff Layton #include "filecache.h" 54dd5e3fbcSChuck Lever #include "trace.h" 555e1533c7SStanislav Kinsbursky 561da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 571da177e4SLinus Torvalds 58f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 59f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 60f32f3c2dSJ. Bruce Fields .si_generation = ~0, 61f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 62f32f3c2dSJ. Bruce Fields }; 63f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 64f32f3c2dSJ. Bruce Fields /* all fields zero */ 65f32f3c2dSJ. Bruce Fields }; 6619ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6719ff0f28STigran Mkrtchyan .si_generation = 1, 6819ff0f28STigran Mkrtchyan }; 69fb500a7cSTrond Myklebust static const stateid_t close_stateid = { 70fb500a7cSTrond Myklebust .si_generation = 0xffffffffU, 71fb500a7cSTrond Myklebust }; 72f32f3c2dSJ. Bruce Fields 73ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 74fd39ca9aSNeilBrown 75f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 76f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7719ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 78ae254dacSAndrew Elble #define CLOSE_STATEID(stateid) (!memcmp((stateid), &close_stateid, sizeof(stateid_t))) 791da177e4SLinus Torvalds 801da177e4SLinus Torvalds /* forward declarations */ 81f9c00c3aSJeff Layton static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner); 826011695dSTrond Myklebust static void nfs4_free_ol_stateid(struct nfs4_stid *stid); 83362063a5SScott Mayhew void nfsd4_end_grace(struct nfsd_net *nn); 84624322f1SOlga Kornievskaia static void _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps); 851da177e4SLinus Torvalds 868b671b80SJ. Bruce Fields /* Locking: */ 878b671b80SJ. Bruce Fields 888b671b80SJ. Bruce Fields /* 898b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 908b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 918b671b80SJ. Bruce Fields * eventually cover more: 928b671b80SJ. Bruce Fields */ 93cdc97505SBenny Halevy static DEFINE_SPINLOCK(state_lock); 948b671b80SJ. Bruce Fields 954f34bd05SAndrew Elble enum nfsd4_st_mutex_lock_subclass { 964f34bd05SAndrew Elble OPEN_STATEID_MUTEX = 0, 974f34bd05SAndrew Elble LOCK_STATEID_MUTEX = 1, 984f34bd05SAndrew Elble }; 994f34bd05SAndrew Elble 100b401be22SJeff Layton /* 101b401be22SJeff Layton * A waitqueue for all in-progress 4.0 CLOSE operations that are waiting for 102b401be22SJeff Layton * the refcount on the open stateid to drop. 103b401be22SJeff Layton */ 104b401be22SJeff Layton static DECLARE_WAIT_QUEUE_HEAD(close_wq); 105b401be22SJeff Layton 10689c905beSJ. Bruce Fields /* 10789c905beSJ. Bruce Fields * A waitqueue where a writer to clients/#/ctl destroying a client can 10889c905beSJ. Bruce Fields * wait for cl_rpc_users to drop to 0 and then for the client to be 10989c905beSJ. Bruce Fields * unhashed. 11089c905beSJ. Bruce Fields */ 11189c905beSJ. Bruce Fields static DECLARE_WAIT_QUEUE_HEAD(expiry_wq); 11289c905beSJ. Bruce Fields 1139258a2d5SJeff Layton static struct kmem_cache *client_slab; 114abf1135bSChristoph Hellwig static struct kmem_cache *openowner_slab; 115abf1135bSChristoph Hellwig static struct kmem_cache *lockowner_slab; 116abf1135bSChristoph Hellwig static struct kmem_cache *file_slab; 117abf1135bSChristoph Hellwig static struct kmem_cache *stateid_slab; 118abf1135bSChristoph Hellwig static struct kmem_cache *deleg_slab; 1198287f009SSachin Bhamare static struct kmem_cache *odstate_slab; 120e60d4398SNeilBrown 12166b2b9b2SJ. Bruce Fields static void free_session(struct nfsd4_session *); 122508dc6e1SBenny Halevy 123c4cb8974SJulia Lawall static const struct nfsd4_callback_ops nfsd4_cb_recall_ops; 12476d348faSJeff Layton static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops; 1250162ac2bSChristoph Hellwig 12666b2b9b2SJ. Bruce Fields static bool is_session_dead(struct nfsd4_session *ses) 127508dc6e1SBenny Halevy { 12866b2b9b2SJ. Bruce Fields return ses->se_flags & NFS4_SESSION_DEAD; 12966b2b9b2SJ. Bruce Fields } 13066b2b9b2SJ. Bruce Fields 131f0f51f5cSJ. Bruce Fields static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) 132f0f51f5cSJ. Bruce Fields { 133f0f51f5cSJ. Bruce Fields if (atomic_read(&ses->se_ref) > ref_held_by_me) 13466b2b9b2SJ. Bruce Fields return nfserr_jukebox; 13566b2b9b2SJ. Bruce Fields ses->se_flags |= NFS4_SESSION_DEAD; 13666b2b9b2SJ. Bruce Fields return nfs_ok; 13766b2b9b2SJ. Bruce Fields } 13866b2b9b2SJ. Bruce Fields 139221a6876SJ. Bruce Fields static bool is_client_expired(struct nfs4_client *clp) 140221a6876SJ. Bruce Fields { 141221a6876SJ. Bruce Fields return clp->cl_time == 0; 142221a6876SJ. Bruce Fields } 143221a6876SJ. Bruce Fields 144221a6876SJ. Bruce Fields static __be32 get_client_locked(struct nfs4_client *clp) 145221a6876SJ. Bruce Fields { 1460a880a28STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1470a880a28STrond Myklebust 1480a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 1490a880a28STrond Myklebust 150221a6876SJ. Bruce Fields if (is_client_expired(clp)) 151221a6876SJ. Bruce Fields return nfserr_expired; 15214ed14ccSJ. Bruce Fields atomic_inc(&clp->cl_rpc_users); 153221a6876SJ. Bruce Fields return nfs_ok; 154221a6876SJ. Bruce Fields } 155221a6876SJ. Bruce Fields 156221a6876SJ. Bruce Fields /* must be called under the client_lock */ 157221a6876SJ. Bruce Fields static inline void 158221a6876SJ. Bruce Fields renew_client_locked(struct nfs4_client *clp) 159221a6876SJ. Bruce Fields { 160221a6876SJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 161221a6876SJ. Bruce Fields 162221a6876SJ. Bruce Fields if (is_client_expired(clp)) { 163221a6876SJ. Bruce Fields WARN_ON(1); 164221a6876SJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 165221a6876SJ. Bruce Fields __func__, 166221a6876SJ. Bruce Fields clp->cl_clientid.cl_boot, 167221a6876SJ. Bruce Fields clp->cl_clientid.cl_id); 168221a6876SJ. Bruce Fields return; 169221a6876SJ. Bruce Fields } 170221a6876SJ. Bruce Fields 171221a6876SJ. Bruce Fields list_move_tail(&clp->cl_lru, &nn->client_lru); 17220b7d86fSArnd Bergmann clp->cl_time = ktime_get_boottime_seconds(); 173221a6876SJ. Bruce Fields } 174221a6876SJ. Bruce Fields 175ba138435SFengguang Wu static void put_client_renew_locked(struct nfs4_client *clp) 176221a6876SJ. Bruce Fields { 1770a880a28STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1780a880a28STrond Myklebust 1790a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 1800a880a28STrond Myklebust 18114ed14ccSJ. Bruce Fields if (!atomic_dec_and_test(&clp->cl_rpc_users)) 182221a6876SJ. Bruce Fields return; 183221a6876SJ. Bruce Fields if (!is_client_expired(clp)) 184221a6876SJ. Bruce Fields renew_client_locked(clp); 18589c905beSJ. Bruce Fields else 18689c905beSJ. Bruce Fields wake_up_all(&expiry_wq); 187221a6876SJ. Bruce Fields } 188221a6876SJ. Bruce Fields 1894b24ca7dSJeff Layton static void put_client_renew(struct nfs4_client *clp) 1904b24ca7dSJeff Layton { 1914b24ca7dSJeff Layton struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1924b24ca7dSJeff Layton 19314ed14ccSJ. Bruce Fields if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock)) 194d6c249b4SJeff Layton return; 195d6c249b4SJeff Layton if (!is_client_expired(clp)) 196d6c249b4SJeff Layton renew_client_locked(clp); 19789c905beSJ. Bruce Fields else 19889c905beSJ. Bruce Fields wake_up_all(&expiry_wq); 1994b24ca7dSJeff Layton spin_unlock(&nn->client_lock); 2004b24ca7dSJeff Layton } 2014b24ca7dSJeff Layton 202d4e19e70STrond Myklebust static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) 203d4e19e70STrond Myklebust { 204d4e19e70STrond Myklebust __be32 status; 205d4e19e70STrond Myklebust 206d4e19e70STrond Myklebust if (is_session_dead(ses)) 207d4e19e70STrond Myklebust return nfserr_badsession; 208d4e19e70STrond Myklebust status = get_client_locked(ses->se_client); 209d4e19e70STrond Myklebust if (status) 210d4e19e70STrond Myklebust return status; 211d4e19e70STrond Myklebust atomic_inc(&ses->se_ref); 212d4e19e70STrond Myklebust return nfs_ok; 213d4e19e70STrond Myklebust } 214d4e19e70STrond Myklebust 215d4e19e70STrond Myklebust static void nfsd4_put_session_locked(struct nfsd4_session *ses) 216d4e19e70STrond Myklebust { 217d4e19e70STrond Myklebust struct nfs4_client *clp = ses->se_client; 2180a880a28STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 2190a880a28STrond Myklebust 2200a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 221d4e19e70STrond Myklebust 222d4e19e70STrond Myklebust if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) 223d4e19e70STrond Myklebust free_session(ses); 224d4e19e70STrond Myklebust put_client_renew_locked(clp); 225d4e19e70STrond Myklebust } 226d4e19e70STrond Myklebust 227d4e19e70STrond Myklebust static void nfsd4_put_session(struct nfsd4_session *ses) 228d4e19e70STrond Myklebust { 229d4e19e70STrond Myklebust struct nfs4_client *clp = ses->se_client; 230d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 231d4e19e70STrond Myklebust 232d4e19e70STrond Myklebust spin_lock(&nn->client_lock); 233d4e19e70STrond Myklebust nfsd4_put_session_locked(ses); 234d4e19e70STrond Myklebust spin_unlock(&nn->client_lock); 235d4e19e70STrond Myklebust } 236d4e19e70STrond Myklebust 23776d348faSJeff Layton static struct nfsd4_blocked_lock * 23876d348faSJeff Layton find_blocked_lock(struct nfs4_lockowner *lo, struct knfsd_fh *fh, 23976d348faSJeff Layton struct nfsd_net *nn) 24076d348faSJeff Layton { 24176d348faSJeff Layton struct nfsd4_blocked_lock *cur, *found = NULL; 24276d348faSJeff Layton 2430cc11a61SJeff Layton spin_lock(&nn->blocked_locks_lock); 24476d348faSJeff Layton list_for_each_entry(cur, &lo->lo_blocked, nbl_list) { 24576d348faSJeff Layton if (fh_match(fh, &cur->nbl_fh)) { 24676d348faSJeff Layton list_del_init(&cur->nbl_list); 2477919d0a2SJeff Layton list_del_init(&cur->nbl_lru); 24876d348faSJeff Layton found = cur; 24976d348faSJeff Layton break; 25076d348faSJeff Layton } 25176d348faSJeff Layton } 2520cc11a61SJeff Layton spin_unlock(&nn->blocked_locks_lock); 25376d348faSJeff Layton if (found) 254cb03f94fSNeilBrown locks_delete_block(&found->nbl_lock); 25576d348faSJeff Layton return found; 25676d348faSJeff Layton } 25776d348faSJeff Layton 25876d348faSJeff Layton static struct nfsd4_blocked_lock * 25976d348faSJeff Layton find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh, 26076d348faSJeff Layton struct nfsd_net *nn) 26176d348faSJeff Layton { 26276d348faSJeff Layton struct nfsd4_blocked_lock *nbl; 26376d348faSJeff Layton 26476d348faSJeff Layton nbl = find_blocked_lock(lo, fh, nn); 26576d348faSJeff Layton if (!nbl) { 26676d348faSJeff Layton nbl= kmalloc(sizeof(*nbl), GFP_KERNEL); 26776d348faSJeff Layton if (nbl) { 268e1e8399eSVasily Averin INIT_LIST_HEAD(&nbl->nbl_list); 269e1e8399eSVasily Averin INIT_LIST_HEAD(&nbl->nbl_lru); 27076d348faSJeff Layton fh_copy_shallow(&nbl->nbl_fh, fh); 27176d348faSJeff Layton locks_init_lock(&nbl->nbl_lock); 27276d348faSJeff Layton nfsd4_init_cb(&nbl->nbl_cb, lo->lo_owner.so_client, 27376d348faSJeff Layton &nfsd4_cb_notify_lock_ops, 27476d348faSJeff Layton NFSPROC4_CLNT_CB_NOTIFY_LOCK); 27576d348faSJeff Layton } 27676d348faSJeff Layton } 27776d348faSJeff Layton return nbl; 27876d348faSJeff Layton } 27976d348faSJeff Layton 28076d348faSJeff Layton static void 28176d348faSJeff Layton free_blocked_lock(struct nfsd4_blocked_lock *nbl) 28276d348faSJeff Layton { 2836aaafc43SJeff Layton locks_delete_block(&nbl->nbl_lock); 28476d348faSJeff Layton locks_release_private(&nbl->nbl_lock); 28576d348faSJeff Layton kfree(nbl); 28676d348faSJeff Layton } 28776d348faSJeff Layton 28868ef3bc3SJeff Layton static void 28968ef3bc3SJeff Layton remove_blocked_locks(struct nfs4_lockowner *lo) 29068ef3bc3SJeff Layton { 29168ef3bc3SJeff Layton struct nfs4_client *clp = lo->lo_owner.so_client; 29268ef3bc3SJeff Layton struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 29368ef3bc3SJeff Layton struct nfsd4_blocked_lock *nbl; 29468ef3bc3SJeff Layton LIST_HEAD(reaplist); 29568ef3bc3SJeff Layton 29668ef3bc3SJeff Layton /* Dequeue all blocked locks */ 29768ef3bc3SJeff Layton spin_lock(&nn->blocked_locks_lock); 29868ef3bc3SJeff Layton while (!list_empty(&lo->lo_blocked)) { 29968ef3bc3SJeff Layton nbl = list_first_entry(&lo->lo_blocked, 30068ef3bc3SJeff Layton struct nfsd4_blocked_lock, 30168ef3bc3SJeff Layton nbl_list); 30268ef3bc3SJeff Layton list_del_init(&nbl->nbl_list); 30368ef3bc3SJeff Layton list_move(&nbl->nbl_lru, &reaplist); 30468ef3bc3SJeff Layton } 30568ef3bc3SJeff Layton spin_unlock(&nn->blocked_locks_lock); 30668ef3bc3SJeff Layton 30768ef3bc3SJeff Layton /* Now free them */ 30868ef3bc3SJeff Layton while (!list_empty(&reaplist)) { 30968ef3bc3SJeff Layton nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock, 31068ef3bc3SJeff Layton nbl_lru); 31168ef3bc3SJeff Layton list_del_init(&nbl->nbl_lru); 31268ef3bc3SJeff Layton free_blocked_lock(nbl); 31368ef3bc3SJeff Layton } 31468ef3bc3SJeff Layton } 31568ef3bc3SJeff Layton 316f456458eSJeff Layton static void 317f456458eSJeff Layton nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) 318f456458eSJeff Layton { 319f456458eSJeff Layton struct nfsd4_blocked_lock *nbl = container_of(cb, 320f456458eSJeff Layton struct nfsd4_blocked_lock, nbl_cb); 321f456458eSJeff Layton locks_delete_block(&nbl->nbl_lock); 322f456458eSJeff Layton } 323f456458eSJeff Layton 32476d348faSJeff Layton static int 32576d348faSJeff Layton nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) 32676d348faSJeff Layton { 32776d348faSJeff Layton /* 32876d348faSJeff Layton * Since this is just an optimization, we don't try very hard if it 32976d348faSJeff Layton * turns out not to succeed. We'll requeue it on NFS4ERR_DELAY, and 33076d348faSJeff Layton * just quit trying on anything else. 33176d348faSJeff Layton */ 33276d348faSJeff Layton switch (task->tk_status) { 33376d348faSJeff Layton case -NFS4ERR_DELAY: 33476d348faSJeff Layton rpc_delay(task, 1 * HZ); 33576d348faSJeff Layton return 0; 33676d348faSJeff Layton default: 33776d348faSJeff Layton return 1; 33876d348faSJeff Layton } 33976d348faSJeff Layton } 34076d348faSJeff Layton 34176d348faSJeff Layton static void 34276d348faSJeff Layton nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) 34376d348faSJeff Layton { 34476d348faSJeff Layton struct nfsd4_blocked_lock *nbl = container_of(cb, 34576d348faSJeff Layton struct nfsd4_blocked_lock, nbl_cb); 34676d348faSJeff Layton 34776d348faSJeff Layton free_blocked_lock(nbl); 34876d348faSJeff Layton } 34976d348faSJeff Layton 35076d348faSJeff Layton static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { 351f456458eSJeff Layton .prepare = nfsd4_cb_notify_lock_prepare, 35276d348faSJeff Layton .done = nfsd4_cb_notify_lock_done, 35376d348faSJeff Layton .release = nfsd4_cb_notify_lock_release, 35476d348faSJeff Layton }; 35576d348faSJeff Layton 356b5971afaSKinglong Mee static inline struct nfs4_stateowner * 357b5971afaSKinglong Mee nfs4_get_stateowner(struct nfs4_stateowner *sop) 358b5971afaSKinglong Mee { 359b5971afaSKinglong Mee atomic_inc(&sop->so_count); 360b5971afaSKinglong Mee return sop; 361b5971afaSKinglong Mee } 362b5971afaSKinglong Mee 3637ffb5880STrond Myklebust static int 364d4f0489fSTrond Myklebust same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner) 3657ffb5880STrond Myklebust { 3667ffb5880STrond Myklebust return (sop->so_owner.len == owner->len) && 367d4f0489fSTrond Myklebust 0 == memcmp(sop->so_owner.data, owner->data, owner->len); 3687ffb5880STrond Myklebust } 3697ffb5880STrond Myklebust 3707ffb5880STrond Myklebust static struct nfs4_openowner * 3717ffb5880STrond Myklebust find_openstateowner_str_locked(unsigned int hashval, struct nfsd4_open *open, 372d4f0489fSTrond Myklebust struct nfs4_client *clp) 3737ffb5880STrond Myklebust { 3747ffb5880STrond Myklebust struct nfs4_stateowner *so; 3757ffb5880STrond Myklebust 376d4f0489fSTrond Myklebust lockdep_assert_held(&clp->cl_lock); 3777ffb5880STrond Myklebust 378d4f0489fSTrond Myklebust list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[hashval], 379d4f0489fSTrond Myklebust so_strhash) { 3807ffb5880STrond Myklebust if (!so->so_is_open_owner) 3817ffb5880STrond Myklebust continue; 382b5971afaSKinglong Mee if (same_owner_str(so, &open->op_owner)) 383b5971afaSKinglong Mee return openowner(nfs4_get_stateowner(so)); 3847ffb5880STrond Myklebust } 3857ffb5880STrond Myklebust return NULL; 3867ffb5880STrond Myklebust } 3877ffb5880STrond Myklebust 3887ffb5880STrond Myklebust static struct nfs4_openowner * 3897ffb5880STrond Myklebust find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, 390d4f0489fSTrond Myklebust struct nfs4_client *clp) 3917ffb5880STrond Myklebust { 3927ffb5880STrond Myklebust struct nfs4_openowner *oo; 3937ffb5880STrond Myklebust 394d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 395d4f0489fSTrond Myklebust oo = find_openstateowner_str_locked(hashval, open, clp); 396d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 3977ffb5880STrond Myklebust return oo; 3987ffb5880STrond Myklebust } 3997ffb5880STrond Myklebust 4001da177e4SLinus Torvalds static inline u32 4011da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 4021da177e4SLinus Torvalds { 4031da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds u32 x = 0; 4061da177e4SLinus Torvalds while (nbytes--) { 4071da177e4SLinus Torvalds x *= 37; 4081da177e4SLinus Torvalds x += *cptr++; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds return x; 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds 4135b095e99SJeff Layton static void nfsd4_free_file_rcu(struct rcu_head *rcu) 41432513b40SJ. Bruce Fields { 4155b095e99SJeff Layton struct nfs4_file *fp = container_of(rcu, struct nfs4_file, fi_rcu); 4165b095e99SJeff Layton 4175b095e99SJeff Layton kmem_cache_free(file_slab, fp); 41832513b40SJ. Bruce Fields } 41932513b40SJ. Bruce Fields 420e6ba76e1SChristoph Hellwig void 42113cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 42213cd2184SNeilBrown { 42302e1215fSJeff Layton might_lock(&state_lock); 42402e1215fSJeff Layton 425818a34ebSElena Reshetova if (refcount_dec_and_lock(&fi->fi_ref, &state_lock)) { 4265b095e99SJeff Layton hlist_del_rcu(&fi->fi_hash); 427cdc97505SBenny Halevy spin_unlock(&state_lock); 4288287f009SSachin Bhamare WARN_ON_ONCE(!list_empty(&fi->fi_clnt_odstate)); 4295b095e99SJeff Layton WARN_ON_ONCE(!list_empty(&fi->fi_delegations)); 4305b095e99SJeff Layton call_rcu(&fi->fi_rcu, nfsd4_free_file_rcu); 4318b671b80SJ. Bruce Fields } 43213cd2184SNeilBrown } 43313cd2184SNeilBrown 434eb82dd39SJeff Layton static struct nfsd_file * 435de18643dSTrond Myklebust __nfs4_get_fd(struct nfs4_file *f, int oflag) 436de18643dSTrond Myklebust { 437de18643dSTrond Myklebust if (f->fi_fds[oflag]) 438eb82dd39SJeff Layton return nfsd_file_get(f->fi_fds[oflag]); 439de18643dSTrond Myklebust return NULL; 440de18643dSTrond Myklebust } 441de18643dSTrond Myklebust 442eb82dd39SJeff Layton static struct nfsd_file * 443de18643dSTrond Myklebust find_writeable_file_locked(struct nfs4_file *f) 444de18643dSTrond Myklebust { 445eb82dd39SJeff Layton struct nfsd_file *ret; 446de18643dSTrond Myklebust 447de18643dSTrond Myklebust lockdep_assert_held(&f->fi_lock); 448de18643dSTrond Myklebust 449de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_WRONLY); 450de18643dSTrond Myklebust if (!ret) 451de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_RDWR); 452de18643dSTrond Myklebust return ret; 453de18643dSTrond Myklebust } 454de18643dSTrond Myklebust 455eb82dd39SJeff Layton static struct nfsd_file * 456de18643dSTrond Myklebust find_writeable_file(struct nfs4_file *f) 457de18643dSTrond Myklebust { 458eb82dd39SJeff Layton struct nfsd_file *ret; 459de18643dSTrond Myklebust 460de18643dSTrond Myklebust spin_lock(&f->fi_lock); 461de18643dSTrond Myklebust ret = find_writeable_file_locked(f); 462de18643dSTrond Myklebust spin_unlock(&f->fi_lock); 463de18643dSTrond Myklebust 464de18643dSTrond Myklebust return ret; 465de18643dSTrond Myklebust } 466de18643dSTrond Myklebust 467eb82dd39SJeff Layton static struct nfsd_file * 468eb82dd39SJeff Layton find_readable_file_locked(struct nfs4_file *f) 469de18643dSTrond Myklebust { 470eb82dd39SJeff Layton struct nfsd_file *ret; 471de18643dSTrond Myklebust 472de18643dSTrond Myklebust lockdep_assert_held(&f->fi_lock); 473de18643dSTrond Myklebust 474de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_RDONLY); 475de18643dSTrond Myklebust if (!ret) 476de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_RDWR); 477de18643dSTrond Myklebust return ret; 478de18643dSTrond Myklebust } 479de18643dSTrond Myklebust 480eb82dd39SJeff Layton static struct nfsd_file * 481de18643dSTrond Myklebust find_readable_file(struct nfs4_file *f) 482de18643dSTrond Myklebust { 483eb82dd39SJeff Layton struct nfsd_file *ret; 484de18643dSTrond Myklebust 485de18643dSTrond Myklebust spin_lock(&f->fi_lock); 486de18643dSTrond Myklebust ret = find_readable_file_locked(f); 487de18643dSTrond Myklebust spin_unlock(&f->fi_lock); 488de18643dSTrond Myklebust 489de18643dSTrond Myklebust return ret; 490de18643dSTrond Myklebust } 491de18643dSTrond Myklebust 492eb82dd39SJeff Layton struct nfsd_file * 493de18643dSTrond Myklebust find_any_file(struct nfs4_file *f) 494de18643dSTrond Myklebust { 495eb82dd39SJeff Layton struct nfsd_file *ret; 496de18643dSTrond Myklebust 497a451b123STrond Myklebust if (!f) 498a451b123STrond Myklebust return NULL; 499de18643dSTrond Myklebust spin_lock(&f->fi_lock); 500de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_RDWR); 501de18643dSTrond Myklebust if (!ret) { 502de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_WRONLY); 503de18643dSTrond Myklebust if (!ret) 504de18643dSTrond Myklebust ret = __nfs4_get_fd(f, O_RDONLY); 505de18643dSTrond Myklebust } 506de18643dSTrond Myklebust spin_unlock(&f->fi_lock); 507de18643dSTrond Myklebust return ret; 508de18643dSTrond Myklebust } 509de18643dSTrond Myklebust 51002a3508dSTrond Myklebust static atomic_long_t num_delegations; 511697ce9beSZhang Yanfei unsigned long max_delegations; 512ef0f3390SNeilBrown 513ef0f3390SNeilBrown /* 514ef0f3390SNeilBrown * Open owner state (share locks) 515ef0f3390SNeilBrown */ 516ef0f3390SNeilBrown 51716bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 51816bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 51916bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 52016bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 521ef0f3390SNeilBrown 522d4f0489fSTrond Myklebust static unsigned int ownerstr_hashval(struct xdr_netobj *ownername) 523ddc04c41SJ. Bruce Fields { 524ddc04c41SJ. Bruce Fields unsigned int ret; 525ddc04c41SJ. Bruce Fields 526ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 52716bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 528ddc04c41SJ. Bruce Fields } 529ef0f3390SNeilBrown 530ef0f3390SNeilBrown /* hash table for nfs4_file */ 531ef0f3390SNeilBrown #define FILE_HASH_BITS 8 532ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 53335079582SShan Wei 534ca943217STrond Myklebust static unsigned int nfsd_fh_hashval(struct knfsd_fh *fh) 535ddc04c41SJ. Bruce Fields { 536ca943217STrond Myklebust return jhash2(fh->fh_base.fh_pad, XDR_QUADLEN(fh->fh_size), 0); 537ca943217STrond Myklebust } 538ca943217STrond Myklebust 539ca943217STrond Myklebust static unsigned int file_hashval(struct knfsd_fh *fh) 540ca943217STrond Myklebust { 541ca943217STrond Myklebust return nfsd_fh_hashval(fh) & (FILE_HASH_SIZE - 1); 542ca943217STrond Myklebust } 543ca943217STrond Myklebust 54489876f8cSJeff Layton static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; 545ef0f3390SNeilBrown 54612659651SJeff Layton static void 54712659651SJeff Layton __nfs4_file_get_access(struct nfs4_file *fp, u32 access) 5483477565eSJ. Bruce Fields { 5497214e860SJeff Layton lockdep_assert_held(&fp->fi_lock); 5507214e860SJeff Layton 55112659651SJeff Layton if (access & NFS4_SHARE_ACCESS_WRITE) 55212659651SJeff Layton atomic_inc(&fp->fi_access[O_WRONLY]); 55312659651SJeff Layton if (access & NFS4_SHARE_ACCESS_READ) 55412659651SJeff Layton atomic_inc(&fp->fi_access[O_RDONLY]); 5553477565eSJ. Bruce Fields } 5563477565eSJ. Bruce Fields 55712659651SJeff Layton static __be32 55812659651SJeff Layton nfs4_file_get_access(struct nfs4_file *fp, u32 access) 559998db52cSJ. Bruce Fields { 5607214e860SJeff Layton lockdep_assert_held(&fp->fi_lock); 5617214e860SJeff Layton 56212659651SJeff Layton /* Does this access mode make sense? */ 56312659651SJeff Layton if (access & ~NFS4_SHARE_ACCESS_BOTH) 56412659651SJeff Layton return nfserr_inval; 56512659651SJeff Layton 566baeb4ff0SJeff Layton /* Does it conflict with a deny mode already set? */ 567baeb4ff0SJeff Layton if ((access & fp->fi_share_deny) != 0) 568baeb4ff0SJeff Layton return nfserr_share_denied; 569baeb4ff0SJeff Layton 57012659651SJeff Layton __nfs4_file_get_access(fp, access); 57112659651SJeff Layton return nfs_ok; 572998db52cSJ. Bruce Fields } 573998db52cSJ. Bruce Fields 574baeb4ff0SJeff Layton static __be32 nfs4_file_check_deny(struct nfs4_file *fp, u32 deny) 575baeb4ff0SJeff Layton { 576baeb4ff0SJeff Layton /* Common case is that there is no deny mode. */ 577baeb4ff0SJeff Layton if (deny) { 578baeb4ff0SJeff Layton /* Does this deny mode make sense? */ 579baeb4ff0SJeff Layton if (deny & ~NFS4_SHARE_DENY_BOTH) 580baeb4ff0SJeff Layton return nfserr_inval; 581baeb4ff0SJeff Layton 582baeb4ff0SJeff Layton if ((deny & NFS4_SHARE_DENY_READ) && 583baeb4ff0SJeff Layton atomic_read(&fp->fi_access[O_RDONLY])) 584baeb4ff0SJeff Layton return nfserr_share_denied; 585baeb4ff0SJeff Layton 586baeb4ff0SJeff Layton if ((deny & NFS4_SHARE_DENY_WRITE) && 587baeb4ff0SJeff Layton atomic_read(&fp->fi_access[O_WRONLY])) 588baeb4ff0SJeff Layton return nfserr_share_denied; 589baeb4ff0SJeff Layton } 590baeb4ff0SJeff Layton return nfs_ok; 591baeb4ff0SJeff Layton } 592baeb4ff0SJeff Layton 593998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 594f9d7562fSJ. Bruce Fields { 595de18643dSTrond Myklebust might_lock(&fp->fi_lock); 596de18643dSTrond Myklebust 597de18643dSTrond Myklebust if (atomic_dec_and_lock(&fp->fi_access[oflag], &fp->fi_lock)) { 598fd4f83fdSJeff Layton struct nfsd_file *f1 = NULL; 599fd4f83fdSJeff Layton struct nfsd_file *f2 = NULL; 600de18643dSTrond Myklebust 6016d338b51SJeff Layton swap(f1, fp->fi_fds[oflag]); 6020c7c3e67SJ. Bruce Fields if (atomic_read(&fp->fi_access[1 - oflag]) == 0) 6036d338b51SJeff Layton swap(f2, fp->fi_fds[O_RDWR]); 604de18643dSTrond Myklebust spin_unlock(&fp->fi_lock); 605de18643dSTrond Myklebust if (f1) 606fd4f83fdSJeff Layton nfsd_file_put(f1); 607de18643dSTrond Myklebust if (f2) 608fd4f83fdSJeff Layton nfsd_file_put(f2); 609f9d7562fSJ. Bruce Fields } 610f9d7562fSJ. Bruce Fields } 611f9d7562fSJ. Bruce Fields 61212659651SJeff Layton static void nfs4_file_put_access(struct nfs4_file *fp, u32 access) 613998db52cSJ. Bruce Fields { 61412659651SJeff Layton WARN_ON_ONCE(access & ~NFS4_SHARE_ACCESS_BOTH); 61512659651SJeff Layton 61612659651SJeff Layton if (access & NFS4_SHARE_ACCESS_WRITE) 617998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 61812659651SJeff Layton if (access & NFS4_SHARE_ACCESS_READ) 61912659651SJeff Layton __nfs4_file_put_access(fp, O_RDONLY); 620998db52cSJ. Bruce Fields } 621998db52cSJ. Bruce Fields 6228287f009SSachin Bhamare /* 6238287f009SSachin Bhamare * Allocate a new open/delegation state counter. This is needed for 6248287f009SSachin Bhamare * pNFS for proper return on close semantics. 6258287f009SSachin Bhamare * 6268287f009SSachin Bhamare * Note that we only allocate it for pNFS-enabled exports, otherwise 6278287f009SSachin Bhamare * all pointers to struct nfs4_clnt_odstate are always NULL. 6288287f009SSachin Bhamare */ 6298287f009SSachin Bhamare static struct nfs4_clnt_odstate * 6308287f009SSachin Bhamare alloc_clnt_odstate(struct nfs4_client *clp) 6318287f009SSachin Bhamare { 6328287f009SSachin Bhamare struct nfs4_clnt_odstate *co; 6338287f009SSachin Bhamare 6348287f009SSachin Bhamare co = kmem_cache_zalloc(odstate_slab, GFP_KERNEL); 6358287f009SSachin Bhamare if (co) { 6368287f009SSachin Bhamare co->co_client = clp; 637cff7cb2eSElena Reshetova refcount_set(&co->co_odcount, 1); 6388287f009SSachin Bhamare } 6398287f009SSachin Bhamare return co; 6408287f009SSachin Bhamare } 6418287f009SSachin Bhamare 6428287f009SSachin Bhamare static void 6438287f009SSachin Bhamare hash_clnt_odstate_locked(struct nfs4_clnt_odstate *co) 6448287f009SSachin Bhamare { 6458287f009SSachin Bhamare struct nfs4_file *fp = co->co_file; 6468287f009SSachin Bhamare 6478287f009SSachin Bhamare lockdep_assert_held(&fp->fi_lock); 6488287f009SSachin Bhamare list_add(&co->co_perfile, &fp->fi_clnt_odstate); 6498287f009SSachin Bhamare } 6508287f009SSachin Bhamare 6518287f009SSachin Bhamare static inline void 6528287f009SSachin Bhamare get_clnt_odstate(struct nfs4_clnt_odstate *co) 6538287f009SSachin Bhamare { 6548287f009SSachin Bhamare if (co) 655cff7cb2eSElena Reshetova refcount_inc(&co->co_odcount); 6568287f009SSachin Bhamare } 6578287f009SSachin Bhamare 6588287f009SSachin Bhamare static void 6598287f009SSachin Bhamare put_clnt_odstate(struct nfs4_clnt_odstate *co) 6608287f009SSachin Bhamare { 6618287f009SSachin Bhamare struct nfs4_file *fp; 6628287f009SSachin Bhamare 6638287f009SSachin Bhamare if (!co) 6648287f009SSachin Bhamare return; 6658287f009SSachin Bhamare 6668287f009SSachin Bhamare fp = co->co_file; 667cff7cb2eSElena Reshetova if (refcount_dec_and_lock(&co->co_odcount, &fp->fi_lock)) { 6688287f009SSachin Bhamare list_del(&co->co_perfile); 6698287f009SSachin Bhamare spin_unlock(&fp->fi_lock); 6708287f009SSachin Bhamare 6718287f009SSachin Bhamare nfsd4_return_all_file_layouts(co->co_client, fp); 6728287f009SSachin Bhamare kmem_cache_free(odstate_slab, co); 6738287f009SSachin Bhamare } 6748287f009SSachin Bhamare } 6758287f009SSachin Bhamare 6768287f009SSachin Bhamare static struct nfs4_clnt_odstate * 6778287f009SSachin Bhamare find_or_hash_clnt_odstate(struct nfs4_file *fp, struct nfs4_clnt_odstate *new) 6788287f009SSachin Bhamare { 6798287f009SSachin Bhamare struct nfs4_clnt_odstate *co; 6808287f009SSachin Bhamare struct nfs4_client *cl; 6818287f009SSachin Bhamare 6828287f009SSachin Bhamare if (!new) 6838287f009SSachin Bhamare return NULL; 6848287f009SSachin Bhamare 6858287f009SSachin Bhamare cl = new->co_client; 6868287f009SSachin Bhamare 6878287f009SSachin Bhamare spin_lock(&fp->fi_lock); 6888287f009SSachin Bhamare list_for_each_entry(co, &fp->fi_clnt_odstate, co_perfile) { 6898287f009SSachin Bhamare if (co->co_client == cl) { 6908287f009SSachin Bhamare get_clnt_odstate(co); 6918287f009SSachin Bhamare goto out; 6928287f009SSachin Bhamare } 6938287f009SSachin Bhamare } 6948287f009SSachin Bhamare co = new; 6958287f009SSachin Bhamare co->co_file = fp; 6968287f009SSachin Bhamare hash_clnt_odstate_locked(new); 6978287f009SSachin Bhamare out: 6988287f009SSachin Bhamare spin_unlock(&fp->fi_lock); 6998287f009SSachin Bhamare return co; 7008287f009SSachin Bhamare } 7018287f009SSachin Bhamare 702d19fb70dSKinglong Mee struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, 703d19fb70dSKinglong Mee void (*sc_free)(struct nfs4_stid *)) 704996e0938SJ. Bruce Fields { 7053abdb607SJ. Bruce Fields struct nfs4_stid *stid; 7063abdb607SJ. Bruce Fields int new_id; 7073abdb607SJ. Bruce Fields 708f8338834STrond Myklebust stid = kmem_cache_zalloc(slab, GFP_KERNEL); 7093abdb607SJ. Bruce Fields if (!stid) 7103abdb607SJ. Bruce Fields return NULL; 711996e0938SJ. Bruce Fields 7124770d722SJeff Layton idr_preload(GFP_KERNEL); 7134770d722SJeff Layton spin_lock(&cl->cl_lock); 71478599c42SJ. Bruce Fields /* Reserving 0 for start of file in nfsdfs "states" file: */ 71578599c42SJ. Bruce Fields new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT); 7164770d722SJeff Layton spin_unlock(&cl->cl_lock); 7174770d722SJeff Layton idr_preload_end(); 718ebd6c707STejun Heo if (new_id < 0) 7193abdb607SJ. Bruce Fields goto out_free; 720d19fb70dSKinglong Mee 721d19fb70dSKinglong Mee stid->sc_free = sc_free; 7223abdb607SJ. Bruce Fields stid->sc_client = cl; 7233abdb607SJ. Bruce Fields stid->sc_stateid.si_opaque.so_id = new_id; 7243abdb607SJ. Bruce Fields stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; 7253abdb607SJ. Bruce Fields /* Will be incremented before return to client: */ 726a15dfcd5SElena Reshetova refcount_set(&stid->sc_count, 1); 7279767feb2SJeff Layton spin_lock_init(&stid->sc_lock); 728624322f1SOlga Kornievskaia INIT_LIST_HEAD(&stid->sc_cp_list); 7293abdb607SJ. Bruce Fields 730996e0938SJ. Bruce Fields /* 7313abdb607SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 7323abdb607SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 7333abdb607SJ. Bruce Fields * example, a stray write retransmission could be accepted by 7343abdb607SJ. Bruce Fields * the server when it should have been rejected. Therefore, 7353abdb607SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 7363abdb607SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 7373abdb607SJ. Bruce Fields * "increase" (mod INT_MAX): 738996e0938SJ. Bruce Fields */ 7393abdb607SJ. Bruce Fields return stid; 7403abdb607SJ. Bruce Fields out_free: 7412c44a234SWei Yongjun kmem_cache_free(slab, stid); 7423abdb607SJ. Bruce Fields return NULL; 7432a74aba7SJ. Bruce Fields } 7442a74aba7SJ. Bruce Fields 745e0639dc5SOlga Kornievskaia /* 746e0639dc5SOlga Kornievskaia * Create a unique stateid_t to represent each COPY. 747e0639dc5SOlga Kornievskaia */ 748624322f1SOlga Kornievskaia static int nfs4_init_cp_state(struct nfsd_net *nn, copy_stateid_t *stid, 749624322f1SOlga Kornievskaia unsigned char sc_type) 750e0639dc5SOlga Kornievskaia { 751e0639dc5SOlga Kornievskaia int new_id; 752e0639dc5SOlga Kornievskaia 7539cc76801SArnd Bergmann stid->stid.si_opaque.so_clid.cl_boot = (u32)nn->boot_time; 754624322f1SOlga Kornievskaia stid->stid.si_opaque.so_clid.cl_id = nn->s2s_cp_cl_id; 755624322f1SOlga Kornievskaia stid->sc_type = sc_type; 756624322f1SOlga Kornievskaia 757e0639dc5SOlga Kornievskaia idr_preload(GFP_KERNEL); 758e0639dc5SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 759624322f1SOlga Kornievskaia new_id = idr_alloc_cyclic(&nn->s2s_cp_stateids, stid, 0, 0, GFP_NOWAIT); 760624322f1SOlga Kornievskaia stid->stid.si_opaque.so_id = new_id; 761e0639dc5SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 762e0639dc5SOlga Kornievskaia idr_preload_end(); 763e0639dc5SOlga Kornievskaia if (new_id < 0) 764e0639dc5SOlga Kornievskaia return 0; 765e0639dc5SOlga Kornievskaia return 1; 766e0639dc5SOlga Kornievskaia } 767e0639dc5SOlga Kornievskaia 768624322f1SOlga Kornievskaia int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy) 769624322f1SOlga Kornievskaia { 770624322f1SOlga Kornievskaia return nfs4_init_cp_state(nn, ©->cp_stateid, NFS4_COPY_STID); 771624322f1SOlga Kornievskaia } 772624322f1SOlga Kornievskaia 773624322f1SOlga Kornievskaia struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn, 774624322f1SOlga Kornievskaia struct nfs4_stid *p_stid) 775624322f1SOlga Kornievskaia { 776624322f1SOlga Kornievskaia struct nfs4_cpntf_state *cps; 777624322f1SOlga Kornievskaia 778624322f1SOlga Kornievskaia cps = kzalloc(sizeof(struct nfs4_cpntf_state), GFP_KERNEL); 779624322f1SOlga Kornievskaia if (!cps) 780624322f1SOlga Kornievskaia return NULL; 78120b7d86fSArnd Bergmann cps->cpntf_time = ktime_get_boottime_seconds(); 782624322f1SOlga Kornievskaia refcount_set(&cps->cp_stateid.sc_count, 1); 783624322f1SOlga Kornievskaia if (!nfs4_init_cp_state(nn, &cps->cp_stateid, NFS4_COPYNOTIFY_STID)) 784624322f1SOlga Kornievskaia goto out_free; 785624322f1SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 786624322f1SOlga Kornievskaia list_add(&cps->cp_list, &p_stid->sc_cp_list); 787624322f1SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 788624322f1SOlga Kornievskaia return cps; 789624322f1SOlga Kornievskaia out_free: 790624322f1SOlga Kornievskaia kfree(cps); 791624322f1SOlga Kornievskaia return NULL; 792624322f1SOlga Kornievskaia } 793624322f1SOlga Kornievskaia 794624322f1SOlga Kornievskaia void nfs4_free_copy_state(struct nfsd4_copy *copy) 795e0639dc5SOlga Kornievskaia { 796e0639dc5SOlga Kornievskaia struct nfsd_net *nn; 797e0639dc5SOlga Kornievskaia 798624322f1SOlga Kornievskaia WARN_ON_ONCE(copy->cp_stateid.sc_type != NFS4_COPY_STID); 799e0639dc5SOlga Kornievskaia nn = net_generic(copy->cp_clp->net, nfsd_net_id); 800e0639dc5SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 801624322f1SOlga Kornievskaia idr_remove(&nn->s2s_cp_stateids, 802624322f1SOlga Kornievskaia copy->cp_stateid.stid.si_opaque.so_id); 803624322f1SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 804624322f1SOlga Kornievskaia } 805624322f1SOlga Kornievskaia 806624322f1SOlga Kornievskaia static void nfs4_free_cpntf_statelist(struct net *net, struct nfs4_stid *stid) 807624322f1SOlga Kornievskaia { 808624322f1SOlga Kornievskaia struct nfs4_cpntf_state *cps; 809624322f1SOlga Kornievskaia struct nfsd_net *nn; 810624322f1SOlga Kornievskaia 811624322f1SOlga Kornievskaia nn = net_generic(net, nfsd_net_id); 812624322f1SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 813624322f1SOlga Kornievskaia while (!list_empty(&stid->sc_cp_list)) { 814624322f1SOlga Kornievskaia cps = list_first_entry(&stid->sc_cp_list, 815624322f1SOlga Kornievskaia struct nfs4_cpntf_state, cp_list); 816624322f1SOlga Kornievskaia _free_cpntf_state_locked(nn, cps); 817624322f1SOlga Kornievskaia } 818e0639dc5SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 819e0639dc5SOlga Kornievskaia } 820e0639dc5SOlga Kornievskaia 821b49e084dSJeff Layton static struct nfs4_ol_stateid * nfs4_alloc_open_stateid(struct nfs4_client *clp) 8224cdc951bSJ. Bruce Fields { 8236011695dSTrond Myklebust struct nfs4_stid *stid; 8246011695dSTrond Myklebust 825d19fb70dSKinglong Mee stid = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_ol_stateid); 8266011695dSTrond Myklebust if (!stid) 8276011695dSTrond Myklebust return NULL; 8286011695dSTrond Myklebust 829d19fb70dSKinglong Mee return openlockstateid(stid); 8306011695dSTrond Myklebust } 8316011695dSTrond Myklebust 8326011695dSTrond Myklebust static void nfs4_free_deleg(struct nfs4_stid *stid) 8336011695dSTrond Myklebust { 8346011695dSTrond Myklebust kmem_cache_free(deleg_slab, stid); 8356011695dSTrond Myklebust atomic_long_dec(&num_delegations); 8364cdc951bSJ. Bruce Fields } 8374cdc951bSJ. Bruce Fields 8386282cd56SNeilBrown /* 8396282cd56SNeilBrown * When we recall a delegation, we should be careful not to hand it 8406282cd56SNeilBrown * out again straight away. 8416282cd56SNeilBrown * To ensure this we keep a pair of bloom filters ('new' and 'old') 8426282cd56SNeilBrown * in which the filehandles of recalled delegations are "stored". 8436282cd56SNeilBrown * If a filehandle appear in either filter, a delegation is blocked. 8446282cd56SNeilBrown * When a delegation is recalled, the filehandle is stored in the "new" 8456282cd56SNeilBrown * filter. 8466282cd56SNeilBrown * Every 30 seconds we swap the filters and clear the "new" one, 8476282cd56SNeilBrown * unless both are empty of course. 8486282cd56SNeilBrown * 8496282cd56SNeilBrown * Each filter is 256 bits. We hash the filehandle to 32bit and use the 8506282cd56SNeilBrown * low 3 bytes as hash-table indices. 8516282cd56SNeilBrown * 852f54fe962SJeff Layton * 'blocked_delegations_lock', which is always taken in block_delegations(), 8536282cd56SNeilBrown * is used to manage concurrent access. Testing does not need the lock 8546282cd56SNeilBrown * except when swapping the two filters. 8556282cd56SNeilBrown */ 856f54fe962SJeff Layton static DEFINE_SPINLOCK(blocked_delegations_lock); 8576282cd56SNeilBrown static struct bloom_pair { 8586282cd56SNeilBrown int entries, old_entries; 859b3f255efSArnd Bergmann time64_t swap_time; 8606282cd56SNeilBrown int new; /* index into 'set' */ 8616282cd56SNeilBrown DECLARE_BITMAP(set[2], 256); 8626282cd56SNeilBrown } blocked_delegations; 8636282cd56SNeilBrown 8646282cd56SNeilBrown static int delegation_blocked(struct knfsd_fh *fh) 8656282cd56SNeilBrown { 8666282cd56SNeilBrown u32 hash; 8676282cd56SNeilBrown struct bloom_pair *bd = &blocked_delegations; 8686282cd56SNeilBrown 8696282cd56SNeilBrown if (bd->entries == 0) 8706282cd56SNeilBrown return 0; 871b3f255efSArnd Bergmann if (ktime_get_seconds() - bd->swap_time > 30) { 872f54fe962SJeff Layton spin_lock(&blocked_delegations_lock); 873b3f255efSArnd Bergmann if (ktime_get_seconds() - bd->swap_time > 30) { 8746282cd56SNeilBrown bd->entries -= bd->old_entries; 8756282cd56SNeilBrown bd->old_entries = bd->entries; 8766282cd56SNeilBrown memset(bd->set[bd->new], 0, 8776282cd56SNeilBrown sizeof(bd->set[0])); 8786282cd56SNeilBrown bd->new = 1-bd->new; 879b3f255efSArnd Bergmann bd->swap_time = ktime_get_seconds(); 8806282cd56SNeilBrown } 881f54fe962SJeff Layton spin_unlock(&blocked_delegations_lock); 8826282cd56SNeilBrown } 88387545899SDaniel Borkmann hash = jhash(&fh->fh_base, fh->fh_size, 0); 8846282cd56SNeilBrown if (test_bit(hash&255, bd->set[0]) && 8856282cd56SNeilBrown test_bit((hash>>8)&255, bd->set[0]) && 8866282cd56SNeilBrown test_bit((hash>>16)&255, bd->set[0])) 8876282cd56SNeilBrown return 1; 8886282cd56SNeilBrown 8896282cd56SNeilBrown if (test_bit(hash&255, bd->set[1]) && 8906282cd56SNeilBrown test_bit((hash>>8)&255, bd->set[1]) && 8916282cd56SNeilBrown test_bit((hash>>16)&255, bd->set[1])) 8926282cd56SNeilBrown return 1; 8936282cd56SNeilBrown 8946282cd56SNeilBrown return 0; 8956282cd56SNeilBrown } 8966282cd56SNeilBrown 8976282cd56SNeilBrown static void block_delegations(struct knfsd_fh *fh) 8986282cd56SNeilBrown { 8996282cd56SNeilBrown u32 hash; 9006282cd56SNeilBrown struct bloom_pair *bd = &blocked_delegations; 9016282cd56SNeilBrown 90287545899SDaniel Borkmann hash = jhash(&fh->fh_base, fh->fh_size, 0); 9036282cd56SNeilBrown 904f54fe962SJeff Layton spin_lock(&blocked_delegations_lock); 9056282cd56SNeilBrown __set_bit(hash&255, bd->set[bd->new]); 9066282cd56SNeilBrown __set_bit((hash>>8)&255, bd->set[bd->new]); 9076282cd56SNeilBrown __set_bit((hash>>16)&255, bd->set[bd->new]); 9086282cd56SNeilBrown if (bd->entries == 0) 909b3f255efSArnd Bergmann bd->swap_time = ktime_get_seconds(); 9106282cd56SNeilBrown bd->entries += 1; 911f54fe962SJeff Layton spin_unlock(&blocked_delegations_lock); 9126282cd56SNeilBrown } 9136282cd56SNeilBrown 9141da177e4SLinus Torvalds static struct nfs4_delegation * 91586d29b10SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_file *fp, 91686d29b10SJ. Bruce Fields struct svc_fh *current_fh, 9178287f009SSachin Bhamare struct nfs4_clnt_odstate *odstate) 9181da177e4SLinus Torvalds { 9191da177e4SLinus Torvalds struct nfs4_delegation *dp; 92002a3508dSTrond Myklebust long n; 9211da177e4SLinus Torvalds 9221da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 92302a3508dSTrond Myklebust n = atomic_long_inc_return(&num_delegations); 92402a3508dSTrond Myklebust if (n < 0 || n > max_delegations) 92502a3508dSTrond Myklebust goto out_dec; 9266282cd56SNeilBrown if (delegation_blocked(¤t_fh->fh_handle)) 92702a3508dSTrond Myklebust goto out_dec; 928d19fb70dSKinglong Mee dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab, nfs4_free_deleg)); 9295b2d21c1SNeilBrown if (dp == NULL) 93002a3508dSTrond Myklebust goto out_dec; 9316011695dSTrond Myklebust 9322a74aba7SJ. Bruce Fields /* 9332a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 9346136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 9356136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 9362a74aba7SJ. Bruce Fields */ 9372a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 938ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 939ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 9401da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 9418287f009SSachin Bhamare dp->dl_clnt_odstate = odstate; 9428287f009SSachin Bhamare get_clnt_odstate(odstate); 94399c41515SJ. Bruce Fields dp->dl_type = NFS4_OPEN_DELEGATE_READ; 944f0b5de1bSChristoph Hellwig dp->dl_retries = 1; 945f0b5de1bSChristoph Hellwig nfsd4_init_cb(&dp->dl_recall, dp->dl_stid.sc_client, 9460162ac2bSChristoph Hellwig &nfsd4_cb_recall_ops, NFSPROC4_CLNT_CB_RECALL); 94786d29b10SJ. Bruce Fields get_nfs4_file(fp); 94886d29b10SJ. Bruce Fields dp->dl_stid.sc_file = fp; 9491da177e4SLinus Torvalds return dp; 95002a3508dSTrond Myklebust out_dec: 95102a3508dSTrond Myklebust atomic_long_dec(&num_delegations); 95202a3508dSTrond Myklebust return NULL; 9531da177e4SLinus Torvalds } 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds void 9566011695dSTrond Myklebust nfs4_put_stid(struct nfs4_stid *s) 9571da177e4SLinus Torvalds { 95811b9164aSTrond Myklebust struct nfs4_file *fp = s->sc_file; 9596011695dSTrond Myklebust struct nfs4_client *clp = s->sc_client; 9606011695dSTrond Myklebust 9614770d722SJeff Layton might_lock(&clp->cl_lock); 9624770d722SJeff Layton 963a15dfcd5SElena Reshetova if (!refcount_dec_and_lock(&s->sc_count, &clp->cl_lock)) { 964b401be22SJeff Layton wake_up_all(&close_wq); 9656011695dSTrond Myklebust return; 966b401be22SJeff Layton } 9676011695dSTrond Myklebust idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); 968624322f1SOlga Kornievskaia nfs4_free_cpntf_statelist(clp->net, s); 9694770d722SJeff Layton spin_unlock(&clp->cl_lock); 9706011695dSTrond Myklebust s->sc_free(s); 97111b9164aSTrond Myklebust if (fp) 97211b9164aSTrond Myklebust put_nfs4_file(fp); 9731da177e4SLinus Torvalds } 9741da177e4SLinus Torvalds 9759767feb2SJeff Layton void 9769767feb2SJeff Layton nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid) 9779767feb2SJeff Layton { 9789767feb2SJeff Layton stateid_t *src = &stid->sc_stateid; 9799767feb2SJeff Layton 9809767feb2SJeff Layton spin_lock(&stid->sc_lock); 9819767feb2SJeff Layton if (unlikely(++src->si_generation == 0)) 9829767feb2SJeff Layton src->si_generation = 1; 9839767feb2SJeff Layton memcpy(dst, src, sizeof(*dst)); 9849767feb2SJeff Layton spin_unlock(&stid->sc_lock); 9859767feb2SJeff Layton } 9869767feb2SJeff Layton 987353601e7SJ. Bruce Fields static void put_deleg_file(struct nfs4_file *fp) 9881da177e4SLinus Torvalds { 989eb82dd39SJeff Layton struct nfsd_file *nf = NULL; 990353601e7SJ. Bruce Fields 991353601e7SJ. Bruce Fields spin_lock(&fp->fi_lock); 992353601e7SJ. Bruce Fields if (--fp->fi_delegees == 0) 993eb82dd39SJeff Layton swap(nf, fp->fi_deleg_file); 994353601e7SJ. Bruce Fields spin_unlock(&fp->fi_lock); 995353601e7SJ. Bruce Fields 996eb82dd39SJeff Layton if (nf) 997eb82dd39SJeff Layton nfsd_file_put(nf); 998353601e7SJ. Bruce Fields } 999353601e7SJ. Bruce Fields 1000353601e7SJ. Bruce Fields static void nfs4_unlock_deleg_lease(struct nfs4_delegation *dp) 1001353601e7SJ. Bruce Fields { 1002cba7b3d1SJ. Bruce Fields struct nfs4_file *fp = dp->dl_stid.sc_file; 1003eb82dd39SJeff Layton struct nfsd_file *nf = fp->fi_deleg_file; 1004417c6629SJeff Layton 1005b8232d33SJ. Bruce Fields WARN_ON_ONCE(!fp->fi_delegees); 1006b8232d33SJ. Bruce Fields 1007eb82dd39SJeff Layton vfs_setlease(nf->nf_file, F_UNLCK, NULL, (void **)&dp); 1008353601e7SJ. Bruce Fields put_deleg_file(fp); 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds 10110af6e690SJ. Bruce Fields static void destroy_unhashed_deleg(struct nfs4_delegation *dp) 10120af6e690SJ. Bruce Fields { 10130af6e690SJ. Bruce Fields put_clnt_odstate(dp->dl_clnt_odstate); 1014353601e7SJ. Bruce Fields nfs4_unlock_deleg_lease(dp); 10150af6e690SJ. Bruce Fields nfs4_put_stid(&dp->dl_stid); 10160af6e690SJ. Bruce Fields } 10170af6e690SJ. Bruce Fields 1018cd61c522SChristoph Hellwig void nfs4_unhash_stid(struct nfs4_stid *s) 10196136d2b4SJ. Bruce Fields { 10203abdb607SJ. Bruce Fields s->sc_type = 0; 10216136d2b4SJ. Bruce Fields } 10226136d2b4SJ. Bruce Fields 102334ed9872SAndrew Elble /** 102468b18f52SJ. Bruce Fields * nfs4_delegation_exists - Discover if this delegation already exists 102534ed9872SAndrew Elble * @clp: a pointer to the nfs4_client we're granting a delegation to 102634ed9872SAndrew Elble * @fp: a pointer to the nfs4_file we're granting a delegation on 102734ed9872SAndrew Elble * 102834ed9872SAndrew Elble * Return: 102968b18f52SJ. Bruce Fields * On success: true iff an existing delegation is found 103034ed9872SAndrew Elble */ 103134ed9872SAndrew Elble 103268b18f52SJ. Bruce Fields static bool 103368b18f52SJ. Bruce Fields nfs4_delegation_exists(struct nfs4_client *clp, struct nfs4_file *fp) 1034931ee56cSBenny Halevy { 103534ed9872SAndrew Elble struct nfs4_delegation *searchdp = NULL; 103634ed9872SAndrew Elble struct nfs4_client *searchclp = NULL; 103734ed9872SAndrew Elble 1038cdc97505SBenny Halevy lockdep_assert_held(&state_lock); 1039417c6629SJeff Layton lockdep_assert_held(&fp->fi_lock); 1040931ee56cSBenny Halevy 104134ed9872SAndrew Elble list_for_each_entry(searchdp, &fp->fi_delegations, dl_perfile) { 104234ed9872SAndrew Elble searchclp = searchdp->dl_stid.sc_client; 104334ed9872SAndrew Elble if (clp == searchclp) { 104451d87bc2SFengguang Wu return true; 104534ed9872SAndrew Elble } 104634ed9872SAndrew Elble } 104751d87bc2SFengguang Wu return false; 104834ed9872SAndrew Elble } 104934ed9872SAndrew Elble 105034ed9872SAndrew Elble /** 105134ed9872SAndrew Elble * hash_delegation_locked - Add a delegation to the appropriate lists 105234ed9872SAndrew Elble * @dp: a pointer to the nfs4_delegation we are adding. 105334ed9872SAndrew Elble * @fp: a pointer to the nfs4_file we're granting a delegation on 105434ed9872SAndrew Elble * 105534ed9872SAndrew Elble * Return: 105634ed9872SAndrew Elble * On success: NULL if the delegation was successfully hashed. 105734ed9872SAndrew Elble * 105834ed9872SAndrew Elble * On error: -EAGAIN if one was previously granted to this 105934ed9872SAndrew Elble * nfs4_client for this nfs4_file. Delegation is not hashed. 106034ed9872SAndrew Elble * 106134ed9872SAndrew Elble */ 106234ed9872SAndrew Elble 106334ed9872SAndrew Elble static int 106434ed9872SAndrew Elble hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) 106534ed9872SAndrew Elble { 106634ed9872SAndrew Elble struct nfs4_client *clp = dp->dl_stid.sc_client; 106734ed9872SAndrew Elble 106834ed9872SAndrew Elble lockdep_assert_held(&state_lock); 106934ed9872SAndrew Elble lockdep_assert_held(&fp->fi_lock); 107034ed9872SAndrew Elble 107168b18f52SJ. Bruce Fields if (nfs4_delegation_exists(clp, fp)) 107268b18f52SJ. Bruce Fields return -EAGAIN; 1073a15dfcd5SElena Reshetova refcount_inc(&dp->dl_stid.sc_count); 10743fb87d13SBenny Halevy dp->dl_stid.sc_type = NFS4_DELEG_STID; 1075931ee56cSBenny Halevy list_add(&dp->dl_perfile, &fp->fi_delegations); 107634ed9872SAndrew Elble list_add(&dp->dl_perclnt, &clp->cl_delegations); 107734ed9872SAndrew Elble return 0; 1078931ee56cSBenny Halevy } 1079931ee56cSBenny Halevy 10803fcbbd24SJeff Layton static bool 108142690676SJeff Layton unhash_delegation_locked(struct nfs4_delegation *dp) 10821da177e4SLinus Torvalds { 108311b9164aSTrond Myklebust struct nfs4_file *fp = dp->dl_stid.sc_file; 108402e1215fSJeff Layton 108542690676SJeff Layton lockdep_assert_held(&state_lock); 108642690676SJeff Layton 10873fcbbd24SJeff Layton if (list_empty(&dp->dl_perfile)) 10883fcbbd24SJeff Layton return false; 10893fcbbd24SJeff Layton 1090b0fc29d6STrond Myklebust dp->dl_stid.sc_type = NFS4_CLOSED_DELEG_STID; 1091d55a166cSJeff Layton /* Ensure that deleg break won't try to requeue it */ 1092d55a166cSJeff Layton ++dp->dl_time; 1093417c6629SJeff Layton spin_lock(&fp->fi_lock); 1094931ee56cSBenny Halevy list_del_init(&dp->dl_perclnt); 10951da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 109602e1215fSJeff Layton list_del_init(&dp->dl_perfile); 109702e1215fSJeff Layton spin_unlock(&fp->fi_lock); 10983fcbbd24SJeff Layton return true; 1099cbf7a75bSJ. Bruce Fields } 11003bd64a5bSJ. Bruce Fields 11013bd64a5bSJ. Bruce Fields static void destroy_delegation(struct nfs4_delegation *dp) 11023bd64a5bSJ. Bruce Fields { 11033fcbbd24SJeff Layton bool unhashed; 11043fcbbd24SJeff Layton 110542690676SJeff Layton spin_lock(&state_lock); 11063fcbbd24SJeff Layton unhashed = unhash_delegation_locked(dp); 110742690676SJeff Layton spin_unlock(&state_lock); 11080af6e690SJ. Bruce Fields if (unhashed) 11090af6e690SJ. Bruce Fields destroy_unhashed_deleg(dp); 11103fcbbd24SJeff Layton } 11113bd64a5bSJ. Bruce Fields 11123bd64a5bSJ. Bruce Fields static void revoke_delegation(struct nfs4_delegation *dp) 11133bd64a5bSJ. Bruce Fields { 11143bd64a5bSJ. Bruce Fields struct nfs4_client *clp = dp->dl_stid.sc_client; 11153bd64a5bSJ. Bruce Fields 11162d4a532dSJeff Layton WARN_ON(!list_empty(&dp->dl_recall_lru)); 11172d4a532dSJeff Layton 11180af6e690SJ. Bruce Fields if (clp->cl_minorversion) { 11193bd64a5bSJ. Bruce Fields dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; 11200af6e690SJ. Bruce Fields refcount_inc(&dp->dl_stid.sc_count); 11212d4a532dSJeff Layton spin_lock(&clp->cl_lock); 11222d4a532dSJeff Layton list_add(&dp->dl_recall_lru, &clp->cl_revoked); 11232d4a532dSJeff Layton spin_unlock(&clp->cl_lock); 11243bd64a5bSJ. Bruce Fields } 11250af6e690SJ. Bruce Fields destroy_unhashed_deleg(dp); 11263bd64a5bSJ. Bruce Fields } 11273bd64a5bSJ. Bruce Fields 11281da177e4SLinus Torvalds /* 11291da177e4SLinus Torvalds * SETCLIENTID state 11301da177e4SLinus Torvalds */ 11311da177e4SLinus Torvalds 1132ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 1133ddc04c41SJ. Bruce Fields { 1134ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 1135ddc04c41SJ. Bruce Fields } 1136ddc04c41SJ. Bruce Fields 11376b189105SScott Mayhew static unsigned int clientstr_hashval(struct xdr_netobj name) 1138ddc04c41SJ. Bruce Fields { 11396b189105SScott Mayhew return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK; 1140ddc04c41SJ. Bruce Fields } 1141ddc04c41SJ. Bruce Fields 11421da177e4SLinus Torvalds /* 1143f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 1144f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 1145f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 1146f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 1147f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 1148f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 1149f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 1150f9d7562fSJ. Bruce Fields * 1151f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 1152f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 1153f9d7562fSJ. Bruce Fields * 1154f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 1155f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 1156f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 1157f9d7562fSJ. Bruce Fields * 1158f9d7562fSJ. Bruce Fields * which we should reject. 1159f9d7562fSJ. Bruce Fields */ 11605ae037e5SJeff Layton static unsigned int 11615ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 1162f9d7562fSJ. Bruce Fields int i; 11635ae037e5SJeff Layton unsigned int access = 0; 1164f9d7562fSJ. Bruce Fields 1165f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 1166f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 11675ae037e5SJeff Layton access |= i; 1168f9d7562fSJ. Bruce Fields } 11695ae037e5SJeff Layton return access; 1170f9d7562fSJ. Bruce Fields } 1171f9d7562fSJ. Bruce Fields 117282c5ff1bSJeff Layton /* set share access for a given stateid */ 117382c5ff1bSJeff Layton static inline void 117482c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 117582c5ff1bSJeff Layton { 1176c11c591fSJeff Layton unsigned char mask = 1 << access; 1177c11c591fSJeff Layton 1178c11c591fSJeff Layton WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); 1179c11c591fSJeff Layton stp->st_access_bmap |= mask; 118082c5ff1bSJeff Layton } 118182c5ff1bSJeff Layton 118282c5ff1bSJeff Layton /* clear share access for a given stateid */ 118382c5ff1bSJeff Layton static inline void 118482c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 118582c5ff1bSJeff Layton { 1186c11c591fSJeff Layton unsigned char mask = 1 << access; 1187c11c591fSJeff Layton 1188c11c591fSJeff Layton WARN_ON_ONCE(access > NFS4_SHARE_ACCESS_BOTH); 1189c11c591fSJeff Layton stp->st_access_bmap &= ~mask; 119082c5ff1bSJeff Layton } 119182c5ff1bSJeff Layton 119282c5ff1bSJeff Layton /* test whether a given stateid has access */ 119382c5ff1bSJeff Layton static inline bool 119482c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 119582c5ff1bSJeff Layton { 1196c11c591fSJeff Layton unsigned char mask = 1 << access; 1197c11c591fSJeff Layton 1198c11c591fSJeff Layton return (bool)(stp->st_access_bmap & mask); 119982c5ff1bSJeff Layton } 120082c5ff1bSJeff Layton 1201ce0fc43cSJeff Layton /* set share deny for a given stateid */ 1202ce0fc43cSJeff Layton static inline void 1203c11c591fSJeff Layton set_deny(u32 deny, struct nfs4_ol_stateid *stp) 1204ce0fc43cSJeff Layton { 1205c11c591fSJeff Layton unsigned char mask = 1 << deny; 1206c11c591fSJeff Layton 1207c11c591fSJeff Layton WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); 1208c11c591fSJeff Layton stp->st_deny_bmap |= mask; 1209ce0fc43cSJeff Layton } 1210ce0fc43cSJeff Layton 1211ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 1212ce0fc43cSJeff Layton static inline void 1213c11c591fSJeff Layton clear_deny(u32 deny, struct nfs4_ol_stateid *stp) 1214ce0fc43cSJeff Layton { 1215c11c591fSJeff Layton unsigned char mask = 1 << deny; 1216c11c591fSJeff Layton 1217c11c591fSJeff Layton WARN_ON_ONCE(deny > NFS4_SHARE_DENY_BOTH); 1218c11c591fSJeff Layton stp->st_deny_bmap &= ~mask; 1219ce0fc43cSJeff Layton } 1220ce0fc43cSJeff Layton 1221ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 1222ce0fc43cSJeff Layton static inline bool 1223c11c591fSJeff Layton test_deny(u32 deny, struct nfs4_ol_stateid *stp) 1224ce0fc43cSJeff Layton { 1225c11c591fSJeff Layton unsigned char mask = 1 << deny; 1226c11c591fSJeff Layton 1227c11c591fSJeff Layton return (bool)(stp->st_deny_bmap & mask); 1228f9d7562fSJ. Bruce Fields } 1229f9d7562fSJ. Bruce Fields 1230f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 1231f9d7562fSJ. Bruce Fields { 12328f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 1233f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 1234f9d7562fSJ. Bruce Fields return O_RDONLY; 1235f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 1236f9d7562fSJ. Bruce Fields return O_WRONLY; 1237f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 1238f9d7562fSJ. Bruce Fields return O_RDWR; 1239f9d7562fSJ. Bruce Fields } 1240063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 1241063b0fb9SJ. Bruce Fields return O_RDONLY; 1242f9d7562fSJ. Bruce Fields } 1243f9d7562fSJ. Bruce Fields 1244baeb4ff0SJeff Layton /* 1245baeb4ff0SJeff Layton * A stateid that had a deny mode associated with it is being released 1246baeb4ff0SJeff Layton * or downgraded. Recalculate the deny mode on the file. 1247baeb4ff0SJeff Layton */ 1248baeb4ff0SJeff Layton static void 1249baeb4ff0SJeff Layton recalculate_deny_mode(struct nfs4_file *fp) 1250baeb4ff0SJeff Layton { 1251baeb4ff0SJeff Layton struct nfs4_ol_stateid *stp; 1252baeb4ff0SJeff Layton 1253baeb4ff0SJeff Layton spin_lock(&fp->fi_lock); 1254baeb4ff0SJeff Layton fp->fi_share_deny = 0; 1255baeb4ff0SJeff Layton list_for_each_entry(stp, &fp->fi_stateids, st_perfile) 1256baeb4ff0SJeff Layton fp->fi_share_deny |= bmap_to_share_mode(stp->st_deny_bmap); 1257baeb4ff0SJeff Layton spin_unlock(&fp->fi_lock); 1258baeb4ff0SJeff Layton } 1259baeb4ff0SJeff Layton 1260baeb4ff0SJeff Layton static void 1261baeb4ff0SJeff Layton reset_union_bmap_deny(u32 deny, struct nfs4_ol_stateid *stp) 1262baeb4ff0SJeff Layton { 1263baeb4ff0SJeff Layton int i; 1264baeb4ff0SJeff Layton bool change = false; 1265baeb4ff0SJeff Layton 1266baeb4ff0SJeff Layton for (i = 1; i < 4; i++) { 1267baeb4ff0SJeff Layton if ((i & deny) != i) { 1268baeb4ff0SJeff Layton change = true; 1269baeb4ff0SJeff Layton clear_deny(i, stp); 1270baeb4ff0SJeff Layton } 1271baeb4ff0SJeff Layton } 1272baeb4ff0SJeff Layton 1273baeb4ff0SJeff Layton /* Recalculate per-file deny mode if there was a change */ 1274baeb4ff0SJeff Layton if (change) 127511b9164aSTrond Myklebust recalculate_deny_mode(stp->st_stid.sc_file); 1276baeb4ff0SJeff Layton } 1277baeb4ff0SJeff Layton 127882c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 127982c5ff1bSJeff Layton static void 128082c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 128182c5ff1bSJeff Layton { 128282c5ff1bSJeff Layton int i; 128311b9164aSTrond Myklebust struct nfs4_file *fp = stp->st_stid.sc_file; 1284baeb4ff0SJeff Layton 1285baeb4ff0SJeff Layton if (fp && stp->st_deny_bmap != 0) 1286baeb4ff0SJeff Layton recalculate_deny_mode(fp); 128782c5ff1bSJeff Layton 128882c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 128982c5ff1bSJeff Layton if (test_access(i, stp)) 129011b9164aSTrond Myklebust nfs4_file_put_access(stp->st_stid.sc_file, i); 129182c5ff1bSJeff Layton clear_access(i, stp); 129282c5ff1bSJeff Layton } 129382c5ff1bSJeff Layton } 129482c5ff1bSJeff Layton 1295d50ffdedSKinglong Mee static inline void nfs4_free_stateowner(struct nfs4_stateowner *sop) 1296d50ffdedSKinglong Mee { 1297d50ffdedSKinglong Mee kfree(sop->so_owner.data); 1298d50ffdedSKinglong Mee sop->so_ops->so_free(sop); 1299d50ffdedSKinglong Mee } 1300d50ffdedSKinglong Mee 13016b180f0bSJeff Layton static void nfs4_put_stateowner(struct nfs4_stateowner *sop) 13026b180f0bSJeff Layton { 1303a819ecc1SJeff Layton struct nfs4_client *clp = sop->so_client; 1304a819ecc1SJeff Layton 1305a819ecc1SJeff Layton might_lock(&clp->cl_lock); 1306a819ecc1SJeff Layton 1307a819ecc1SJeff Layton if (!atomic_dec_and_lock(&sop->so_count, &clp->cl_lock)) 13086b180f0bSJeff Layton return; 13098f4b54c5SJeff Layton sop->so_ops->so_unhash(sop); 1310a819ecc1SJeff Layton spin_unlock(&clp->cl_lock); 1311d50ffdedSKinglong Mee nfs4_free_stateowner(sop); 13126b180f0bSJeff Layton } 13136b180f0bSJeff Layton 1314a451b123STrond Myklebust static bool 1315a451b123STrond Myklebust nfs4_ol_stateid_unhashed(const struct nfs4_ol_stateid *stp) 1316a451b123STrond Myklebust { 1317a451b123STrond Myklebust return list_empty(&stp->st_perfile); 1318a451b123STrond Myklebust } 1319a451b123STrond Myklebust 1320e8568739SJeff Layton static bool unhash_ol_stateid(struct nfs4_ol_stateid *stp) 1321529d7b2aSJ. Bruce Fields { 132211b9164aSTrond Myklebust struct nfs4_file *fp = stp->st_stid.sc_file; 13231d31a253STrond Myklebust 13241c755dc1SJeff Layton lockdep_assert_held(&stp->st_stateowner->so_client->cl_lock); 13251c755dc1SJeff Layton 1326e8568739SJeff Layton if (list_empty(&stp->st_perfile)) 1327e8568739SJeff Layton return false; 1328e8568739SJeff Layton 13291d31a253STrond Myklebust spin_lock(&fp->fi_lock); 1330e8568739SJeff Layton list_del_init(&stp->st_perfile); 13311d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 1332529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 1333e8568739SJeff Layton return true; 1334529d7b2aSJ. Bruce Fields } 1335529d7b2aSJ. Bruce Fields 13366011695dSTrond Myklebust static void nfs4_free_ol_stateid(struct nfs4_stid *stid) 1337529d7b2aSJ. Bruce Fields { 13386011695dSTrond Myklebust struct nfs4_ol_stateid *stp = openlockstateid(stid); 13394665e2baSJ. Bruce Fields 13408287f009SSachin Bhamare put_clnt_odstate(stp->st_clnt_odstate); 13416011695dSTrond Myklebust release_all_access(stp); 1342d3134b10SJeff Layton if (stp->st_stateowner) 1343d3134b10SJeff Layton nfs4_put_stateowner(stp->st_stateowner); 13446011695dSTrond Myklebust kmem_cache_free(stateid_slab, stid); 1345529d7b2aSJ. Bruce Fields } 1346529d7b2aSJ. Bruce Fields 1347b49e084dSJeff Layton static void nfs4_free_lock_stateid(struct nfs4_stid *stid) 1348529d7b2aSJ. Bruce Fields { 1349b49e084dSJeff Layton struct nfs4_ol_stateid *stp = openlockstateid(stid); 1350b49e084dSJeff Layton struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); 1351eb82dd39SJeff Layton struct nfsd_file *nf; 1352529d7b2aSJ. Bruce Fields 1353eb82dd39SJeff Layton nf = find_any_file(stp->st_stid.sc_file); 1354eb82dd39SJeff Layton if (nf) { 1355eb82dd39SJeff Layton get_file(nf->nf_file); 1356eb82dd39SJeff Layton filp_close(nf->nf_file, (fl_owner_t)lo); 1357eb82dd39SJeff Layton nfsd_file_put(nf); 1358eb82dd39SJeff Layton } 1359b49e084dSJeff Layton nfs4_free_ol_stateid(stid); 1360b49e084dSJeff Layton } 1361b49e084dSJeff Layton 13622c41beb0SJeff Layton /* 13632c41beb0SJeff Layton * Put the persistent reference to an already unhashed generic stateid, while 13642c41beb0SJeff Layton * holding the cl_lock. If it's the last reference, then put it onto the 13652c41beb0SJeff Layton * reaplist for later destruction. 13662c41beb0SJeff Layton */ 13672c41beb0SJeff Layton static void put_ol_stateid_locked(struct nfs4_ol_stateid *stp, 13682c41beb0SJeff Layton struct list_head *reaplist) 13692c41beb0SJeff Layton { 13702c41beb0SJeff Layton struct nfs4_stid *s = &stp->st_stid; 13712c41beb0SJeff Layton struct nfs4_client *clp = s->sc_client; 13722c41beb0SJeff Layton 13732c41beb0SJeff Layton lockdep_assert_held(&clp->cl_lock); 13742c41beb0SJeff Layton 13752c41beb0SJeff Layton WARN_ON_ONCE(!list_empty(&stp->st_locks)); 13762c41beb0SJeff Layton 1377a15dfcd5SElena Reshetova if (!refcount_dec_and_test(&s->sc_count)) { 13782c41beb0SJeff Layton wake_up_all(&close_wq); 13792c41beb0SJeff Layton return; 13802c41beb0SJeff Layton } 13812c41beb0SJeff Layton 13822c41beb0SJeff Layton idr_remove(&clp->cl_stateids, s->sc_stateid.si_opaque.so_id); 13832c41beb0SJeff Layton list_add(&stp->st_locks, reaplist); 13842c41beb0SJeff Layton } 13852c41beb0SJeff Layton 1386e8568739SJeff Layton static bool unhash_lock_stateid(struct nfs4_ol_stateid *stp) 13873c1c995cSJeff Layton { 1388f46c445bSChuck Lever lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); 13893c1c995cSJeff Layton 1390a451b123STrond Myklebust if (!unhash_ol_stateid(stp)) 1391a451b123STrond Myklebust return false; 13923c1c995cSJeff Layton list_del_init(&stp->st_locks); 1393cd61c522SChristoph Hellwig nfs4_unhash_stid(&stp->st_stid); 1394a451b123STrond Myklebust return true; 13953c1c995cSJeff Layton } 13963c1c995cSJeff Layton 13975adfd885SJeff Layton static void release_lock_stateid(struct nfs4_ol_stateid *stp) 1398b49e084dSJeff Layton { 1399f46c445bSChuck Lever struct nfs4_client *clp = stp->st_stid.sc_client; 1400e8568739SJeff Layton bool unhashed; 14011c755dc1SJeff Layton 1402f46c445bSChuck Lever spin_lock(&clp->cl_lock); 1403e8568739SJeff Layton unhashed = unhash_lock_stateid(stp); 1404f46c445bSChuck Lever spin_unlock(&clp->cl_lock); 1405e8568739SJeff Layton if (unhashed) 14066011695dSTrond Myklebust nfs4_put_stid(&stp->st_stid); 1407529d7b2aSJ. Bruce Fields } 1408529d7b2aSJ. Bruce Fields 1409c58c6610STrond Myklebust static void unhash_lockowner_locked(struct nfs4_lockowner *lo) 1410529d7b2aSJ. Bruce Fields { 1411d4f0489fSTrond Myklebust struct nfs4_client *clp = lo->lo_owner.so_client; 1412c58c6610STrond Myklebust 1413d4f0489fSTrond Myklebust lockdep_assert_held(&clp->cl_lock); 1414c58c6610STrond Myklebust 14158f4b54c5SJeff Layton list_del_init(&lo->lo_owner.so_strhash); 14168f4b54c5SJeff Layton } 14178f4b54c5SJeff Layton 14182c41beb0SJeff Layton /* 14192c41beb0SJeff Layton * Free a list of generic stateids that were collected earlier after being 14202c41beb0SJeff Layton * fully unhashed. 14212c41beb0SJeff Layton */ 14222c41beb0SJeff Layton static void 14232c41beb0SJeff Layton free_ol_stateid_reaplist(struct list_head *reaplist) 14242c41beb0SJeff Layton { 14252c41beb0SJeff Layton struct nfs4_ol_stateid *stp; 1426fb94d766SKinglong Mee struct nfs4_file *fp; 14272c41beb0SJeff Layton 14282c41beb0SJeff Layton might_sleep(); 14292c41beb0SJeff Layton 14302c41beb0SJeff Layton while (!list_empty(reaplist)) { 14312c41beb0SJeff Layton stp = list_first_entry(reaplist, struct nfs4_ol_stateid, 14322c41beb0SJeff Layton st_locks); 14332c41beb0SJeff Layton list_del(&stp->st_locks); 1434fb94d766SKinglong Mee fp = stp->st_stid.sc_file; 14352c41beb0SJeff Layton stp->st_stid.sc_free(&stp->st_stid); 1436fb94d766SKinglong Mee if (fp) 1437fb94d766SKinglong Mee put_nfs4_file(fp); 14382c41beb0SJeff Layton } 14392c41beb0SJeff Layton } 14402c41beb0SJeff Layton 1441d83017f9SJeff Layton static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp, 1442d83017f9SJeff Layton struct list_head *reaplist) 14433c87b9b7STrond Myklebust { 14443c87b9b7STrond Myklebust struct nfs4_ol_stateid *stp; 14453c87b9b7STrond Myklebust 1446e8568739SJeff Layton lockdep_assert_held(&open_stp->st_stid.sc_client->cl_lock); 1447e8568739SJeff Layton 14483c87b9b7STrond Myklebust while (!list_empty(&open_stp->st_locks)) { 14493c87b9b7STrond Myklebust stp = list_entry(open_stp->st_locks.next, 14503c87b9b7STrond Myklebust struct nfs4_ol_stateid, st_locks); 1451e8568739SJeff Layton WARN_ON(!unhash_lock_stateid(stp)); 1452d83017f9SJeff Layton put_ol_stateid_locked(stp, reaplist); 1453529d7b2aSJ. Bruce Fields } 1454529d7b2aSJ. Bruce Fields } 1455529d7b2aSJ. Bruce Fields 1456e8568739SJeff Layton static bool unhash_open_stateid(struct nfs4_ol_stateid *stp, 1457d83017f9SJeff Layton struct list_head *reaplist) 14582283963fSJ. Bruce Fields { 14592c41beb0SJeff Layton lockdep_assert_held(&stp->st_stid.sc_client->cl_lock); 14602c41beb0SJeff Layton 1461a451b123STrond Myklebust if (!unhash_ol_stateid(stp)) 1462a451b123STrond Myklebust return false; 1463d83017f9SJeff Layton release_open_stateid_locks(stp, reaplist); 1464a451b123STrond Myklebust return true; 146538c387b5SJ. Bruce Fields } 146638c387b5SJ. Bruce Fields 146738c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 146838c387b5SJ. Bruce Fields { 14692c41beb0SJeff Layton LIST_HEAD(reaplist); 14702c41beb0SJeff Layton 14712c41beb0SJeff Layton spin_lock(&stp->st_stid.sc_client->cl_lock); 1472e8568739SJeff Layton if (unhash_open_stateid(stp, &reaplist)) 14732c41beb0SJeff Layton put_ol_stateid_locked(stp, &reaplist); 14742c41beb0SJeff Layton spin_unlock(&stp->st_stid.sc_client->cl_lock); 14752c41beb0SJeff Layton free_ol_stateid_reaplist(&reaplist); 14762283963fSJ. Bruce Fields } 14772283963fSJ. Bruce Fields 14787ffb5880STrond Myklebust static void unhash_openowner_locked(struct nfs4_openowner *oo) 1479f1d110caSJ. Bruce Fields { 1480d4f0489fSTrond Myklebust struct nfs4_client *clp = oo->oo_owner.so_client; 14817ffb5880STrond Myklebust 1482d4f0489fSTrond Myklebust lockdep_assert_held(&clp->cl_lock); 14837ffb5880STrond Myklebust 14848f4b54c5SJeff Layton list_del_init(&oo->oo_owner.so_strhash); 14858f4b54c5SJeff Layton list_del_init(&oo->oo_perclient); 1486f1d110caSJ. Bruce Fields } 1487f1d110caSJ. Bruce Fields 1488f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 1489f7a4d872SJ. Bruce Fields { 1490217526e7SJeff Layton struct nfsd_net *nn = net_generic(oo->oo_owner.so_client->net, 1491217526e7SJeff Layton nfsd_net_id); 1492217526e7SJeff Layton struct nfs4_ol_stateid *s; 1493f7a4d872SJ. Bruce Fields 1494217526e7SJeff Layton spin_lock(&nn->client_lock); 1495217526e7SJeff Layton s = oo->oo_last_closed_stid; 1496f7a4d872SJ. Bruce Fields if (s) { 1497d3134b10SJeff Layton list_del_init(&oo->oo_close_lru); 1498f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 1499f7a4d872SJ. Bruce Fields } 1500217526e7SJeff Layton spin_unlock(&nn->client_lock); 1501217526e7SJeff Layton if (s) 1502217526e7SJeff Layton nfs4_put_stid(&s->st_stid); 1503f7a4d872SJ. Bruce Fields } 1504f7a4d872SJ. Bruce Fields 15052c41beb0SJeff Layton static void release_openowner(struct nfs4_openowner *oo) 15068f4b54c5SJeff Layton { 15078f4b54c5SJeff Layton struct nfs4_ol_stateid *stp; 1508d4f0489fSTrond Myklebust struct nfs4_client *clp = oo->oo_owner.so_client; 15092c41beb0SJeff Layton struct list_head reaplist; 15107ffb5880STrond Myklebust 15112c41beb0SJeff Layton INIT_LIST_HEAD(&reaplist); 15127ffb5880STrond Myklebust 1513d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 15147ffb5880STrond Myklebust unhash_openowner_locked(oo); 15152c41beb0SJeff Layton while (!list_empty(&oo->oo_owner.so_stateids)) { 15162c41beb0SJeff Layton stp = list_first_entry(&oo->oo_owner.so_stateids, 15172c41beb0SJeff Layton struct nfs4_ol_stateid, st_perstateowner); 1518e8568739SJeff Layton if (unhash_open_stateid(stp, &reaplist)) 15192c41beb0SJeff Layton put_ol_stateid_locked(stp, &reaplist); 15202c41beb0SJeff Layton } 1521d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 15222c41beb0SJeff Layton free_ol_stateid_reaplist(&reaplist); 1523f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 15246b180f0bSJeff Layton nfs4_put_stateowner(&oo->oo_owner); 1525f1d110caSJ. Bruce Fields } 1526f1d110caSJ. Bruce Fields 15275282fd72SMarc Eshel static inline int 15285282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 15295282fd72SMarc Eshel { 15305282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 15315282fd72SMarc Eshel 15325282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 15335282fd72SMarc Eshel } 15345282fd72SMarc Eshel 1535135dd002SMark Salter #ifdef CONFIG_SUNRPC_DEBUG 15365282fd72SMarc Eshel static inline void 15375282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 15385282fd72SMarc Eshel { 15395282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 15405282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 15415282fd72SMarc Eshel } 15428f199b82STrond Myklebust #else 15438f199b82STrond Myklebust static inline void 15448f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 15458f199b82STrond Myklebust { 15468f199b82STrond Myklebust } 15478f199b82STrond Myklebust #endif 15488f199b82STrond Myklebust 15499411b1d4SJ. Bruce Fields /* 15509411b1d4SJ. Bruce Fields * Bump the seqid on cstate->replay_owner, and clear replay_owner if it 15519411b1d4SJ. Bruce Fields * won't be used for replay. 15529411b1d4SJ. Bruce Fields */ 15539411b1d4SJ. Bruce Fields void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) 15549411b1d4SJ. Bruce Fields { 15559411b1d4SJ. Bruce Fields struct nfs4_stateowner *so = cstate->replay_owner; 15569411b1d4SJ. Bruce Fields 15579411b1d4SJ. Bruce Fields if (nfserr == nfserr_replay_me) 15589411b1d4SJ. Bruce Fields return; 15599411b1d4SJ. Bruce Fields 15609411b1d4SJ. Bruce Fields if (!seqid_mutating_err(ntohl(nfserr))) { 156158fb12e6SJeff Layton nfsd4_cstate_clear_replay(cstate); 15629411b1d4SJ. Bruce Fields return; 15639411b1d4SJ. Bruce Fields } 15649411b1d4SJ. Bruce Fields if (!so) 15659411b1d4SJ. Bruce Fields return; 15669411b1d4SJ. Bruce Fields if (so->so_is_open_owner) 15679411b1d4SJ. Bruce Fields release_last_closed_stateid(openowner(so)); 15689411b1d4SJ. Bruce Fields so->so_seqid++; 15699411b1d4SJ. Bruce Fields return; 15709411b1d4SJ. Bruce Fields } 15715282fd72SMarc Eshel 1572ec6b5d7bSAndy Adamson static void 1573ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 1574ec6b5d7bSAndy Adamson { 1575ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 1576ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 1577ec6b5d7bSAndy Adamson 1578ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 1579ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 1580ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 1581ec6b5d7bSAndy Adamson sid->reserved = 0; 1582ec6b5d7bSAndy Adamson } 1583ec6b5d7bSAndy Adamson 1584ec6b5d7bSAndy Adamson /* 1585a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 1586a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 1587a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 1588a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 1589a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 1590a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 1591a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 1592a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 1593a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 1594a649637cSAndy Adamson * for the SEQUENCE op response: 1595ec6b5d7bSAndy Adamson */ 1596a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 1597a649637cSAndy Adamson 1598557ce264SAndy Adamson static void 1599557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 1600557ce264SAndy Adamson { 1601557ce264SAndy Adamson int i; 1602557ce264SAndy Adamson 160353da6a53SJ. Bruce Fields for (i = 0; i < ses->se_fchannel.maxreqs; i++) { 160453da6a53SJ. Bruce Fields free_svc_cred(&ses->se_slots[i]->sl_cred); 1605557ce264SAndy Adamson kfree(ses->se_slots[i]); 1606557ce264SAndy Adamson } 160753da6a53SJ. Bruce Fields } 1608557ce264SAndy Adamson 1609efe0cb6dSJ. Bruce Fields /* 1610efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 1611efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 1612efe0cb6dSJ. Bruce Fields */ 161355c760cfSJ. Bruce Fields static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) 1614efe0cb6dSJ. Bruce Fields { 161555c760cfSJ. Bruce Fields u32 size; 1616efe0cb6dSJ. Bruce Fields 161755c760cfSJ. Bruce Fields if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) 161855c760cfSJ. Bruce Fields size = 0; 161955c760cfSJ. Bruce Fields else 162055c760cfSJ. Bruce Fields size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 162155c760cfSJ. Bruce Fields return size + sizeof(struct nfsd4_slot); 1622557ce264SAndy Adamson } 1623557ce264SAndy Adamson 16245b6feee9SJ. Bruce Fields /* 16255b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 16265b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 162742b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 16285b6feee9SJ. Bruce Fields */ 16292030ca56SNeilBrown static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) 16305b6feee9SJ. Bruce Fields { 163155c760cfSJ. Bruce Fields u32 slotsize = slot_bytes(ca); 163255c760cfSJ. Bruce Fields u32 num = ca->maxreqs; 1633c54f24e3SJ. Bruce Fields unsigned long avail, total_avail; 16342030ca56SNeilBrown unsigned int scale_factor; 16355b6feee9SJ. Bruce Fields 16365b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 16377f49fd5dSNeilBrown if (nfsd_drc_max_mem > nfsd_drc_mem_used) 1638c54f24e3SJ. Bruce Fields total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used; 16397f49fd5dSNeilBrown else 16407f49fd5dSNeilBrown /* We have handed out more space than we chose in 16417f49fd5dSNeilBrown * set_max_drc() to allow. That isn't really a 16427f49fd5dSNeilBrown * problem as long as that doesn't make us think we 16437f49fd5dSNeilBrown * have lots more due to integer overflow. 16447f49fd5dSNeilBrown */ 16457f49fd5dSNeilBrown total_avail = 0; 1646c54f24e3SJ. Bruce Fields avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail); 1647de766e57SJ. Bruce Fields /* 16482030ca56SNeilBrown * Never use more than a fraction of the remaining memory, 16497f49fd5dSNeilBrown * unless it's the only way to give this client a slot. 16502030ca56SNeilBrown * The chosen fraction is either 1/8 or 1/number of threads, 16512030ca56SNeilBrown * whichever is smaller. This ensures there are adequate 16522030ca56SNeilBrown * slots to support multiple clients per thread. 16537f49fd5dSNeilBrown * Give the client one slot even if that would require 16547f49fd5dSNeilBrown * over-allocation--it is better than failure. 1655de766e57SJ. Bruce Fields */ 16562030ca56SNeilBrown scale_factor = max_t(unsigned int, 8, nn->nfsd_serv->sv_nrthreads); 16572030ca56SNeilBrown 16582030ca56SNeilBrown avail = clamp_t(unsigned long, avail, slotsize, 16592030ca56SNeilBrown total_avail/scale_factor); 16605b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 16617f49fd5dSNeilBrown num = max_t(int, num, 1); 16625b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 16635b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 16645b6feee9SJ. Bruce Fields 16655b6feee9SJ. Bruce Fields return num; 16665b6feee9SJ. Bruce Fields } 16675b6feee9SJ. Bruce Fields 166855c760cfSJ. Bruce Fields static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) 16695b6feee9SJ. Bruce Fields { 167055c760cfSJ. Bruce Fields int slotsize = slot_bytes(ca); 167155c760cfSJ. Bruce Fields 16725b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 167355c760cfSJ. Bruce Fields nfsd_drc_mem_used -= slotsize * ca->maxreqs; 16745b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 16755b6feee9SJ. Bruce Fields } 16765b6feee9SJ. Bruce Fields 167760810e54SKinglong Mee static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, 167860810e54SKinglong Mee struct nfsd4_channel_attrs *battrs) 16795b6feee9SJ. Bruce Fields { 168060810e54SKinglong Mee int numslots = fattrs->maxreqs; 168160810e54SKinglong Mee int slotsize = slot_bytes(fattrs); 16825b6feee9SJ. Bruce Fields struct nfsd4_session *new; 16835b6feee9SJ. Bruce Fields int mem, i; 1684ec6b5d7bSAndy Adamson 1685c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 1686ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 16875b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 1688ec6b5d7bSAndy Adamson 16895b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 16906c18ba9fSAlexandros Batsakis if (!new) 16915b6feee9SJ. Bruce Fields return NULL; 1692ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 16935b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 169455c760cfSJ. Bruce Fields new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); 16955b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 1696ec6b5d7bSAndy Adamson goto out_free; 1697ec6b5d7bSAndy Adamson } 169860810e54SKinglong Mee 169960810e54SKinglong Mee memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); 170060810e54SKinglong Mee memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); 170160810e54SKinglong Mee 17025b6feee9SJ. Bruce Fields return new; 17035b6feee9SJ. Bruce Fields out_free: 17045b6feee9SJ. Bruce Fields while (i--) 17055b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 17065b6feee9SJ. Bruce Fields kfree(new); 17075b6feee9SJ. Bruce Fields return NULL; 17085b6feee9SJ. Bruce Fields } 17095b6feee9SJ. Bruce Fields 171019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 171119cf5c02SJ. Bruce Fields { 171219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 171319cf5c02SJ. Bruce Fields kfree(c); 171419cf5c02SJ. Bruce Fields } 171519cf5c02SJ. Bruce Fields 171619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 171719cf5c02SJ. Bruce Fields { 171819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 171919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 172019cf5c02SJ. Bruce Fields 172119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 172219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 172319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 172419cf5c02SJ. Bruce Fields free_conn(c); 172519cf5c02SJ. Bruce Fields } 1726eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 17272e4b7239SJ. Bruce Fields spin_unlock(&clp->cl_lock); 172819cf5c02SJ. Bruce Fields } 172919cf5c02SJ. Bruce Fields 1730d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 1731c7662518SJ. Bruce Fields { 1732c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 1733c7662518SJ. Bruce Fields 1734c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 1735c7662518SJ. Bruce Fields if (!conn) 1736db90681dSJ. Bruce Fields return NULL; 1737c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 1738c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 1739d29c374cSJ. Bruce Fields conn->cn_flags = flags; 1740db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 1741db90681dSJ. Bruce Fields return conn; 1742db90681dSJ. Bruce Fields } 1743db90681dSJ. Bruce Fields 1744328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 1745328ead28SJ. Bruce Fields { 1746328ead28SJ. Bruce Fields conn->cn_session = ses; 1747328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 1748328ead28SJ. Bruce Fields } 1749328ead28SJ. Bruce Fields 1750db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 1751db90681dSJ. Bruce Fields { 1752db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1753c7662518SJ. Bruce Fields 1754c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 1755328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 1756c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1757db90681dSJ. Bruce Fields } 1758c7662518SJ. Bruce Fields 175921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 1760db90681dSJ. Bruce Fields { 176119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 176221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 1763db90681dSJ. Bruce Fields } 1764db90681dSJ. Bruce Fields 1765e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 1766db90681dSJ. Bruce Fields { 176721b75b01SJ. Bruce Fields int ret; 1768db90681dSJ. Bruce Fields 1769db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 177021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 177121b75b01SJ. Bruce Fields if (ret) 177221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 177321b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 177457a37144SJ. Bruce Fields /* We may have gained or lost a callback channel: */ 177557a37144SJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1776c7662518SJ. Bruce Fields } 1777c7662518SJ. Bruce Fields 1778e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 17791d1bc8f2SJ. Bruce Fields { 17801d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 17811d1bc8f2SJ. Bruce Fields 1782e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 17831d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 1784e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 17851d1bc8f2SJ. Bruce Fields } 17861d1bc8f2SJ. Bruce Fields 17871d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 178819cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 1789c7662518SJ. Bruce Fields { 179019cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 179119cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 179219cf5c02SJ. Bruce Fields 179319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 179419cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 179519cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 179619cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 179719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 179819cf5c02SJ. Bruce Fields 179919cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 180019cf5c02SJ. Bruce Fields free_conn(c); 180119cf5c02SJ. Bruce Fields 180219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 180319cf5c02SJ. Bruce Fields } 180419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1805c7662518SJ. Bruce Fields } 1806c7662518SJ. Bruce Fields 18071377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 18081377b69eSJ. Bruce Fields { 18091377b69eSJ. Bruce Fields free_session_slots(ses); 18101377b69eSJ. Bruce Fields kfree(ses); 18111377b69eSJ. Bruce Fields } 18121377b69eSJ. Bruce Fields 181366b2b9b2SJ. Bruce Fields static void free_session(struct nfsd4_session *ses) 1814508dc6e1SBenny Halevy { 1815c7662518SJ. Bruce Fields nfsd4_del_conns(ses); 181655c760cfSJ. Bruce Fields nfsd4_put_drc_mem(&ses->se_fchannel); 1817c7662518SJ. Bruce Fields __free_session(ses); 1818a827bcb2SJ. Bruce Fields } 1819ec6b5d7bSAndy Adamson 1820135ae827SFengguang Wu static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 1821a827bcb2SJ. Bruce Fields { 1822a827bcb2SJ. Bruce Fields int idx; 18231872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1824a827bcb2SJ. Bruce Fields 1825ec6b5d7bSAndy Adamson new->se_client = clp; 1826ec6b5d7bSAndy Adamson gen_sessionid(new); 1827ec6b5d7bSAndy Adamson 1828c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 1829c7662518SJ. Bruce Fields 1830ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 1831ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 18328b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 1833c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 183466b2b9b2SJ. Bruce Fields atomic_set(&new->se_ref, 0); 18355b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 18361872de0eSStanislav Kinsbursky list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); 18374c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1838ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 18394c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 184060810e54SKinglong Mee 1841b0d2e42cSChuck Lever { 1842edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 1843dcbeaa68SJ. Bruce Fields /* 1844dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 1845dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 1846dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 1847dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 1848dcbeaa68SJ. Bruce Fields * future: 1849dcbeaa68SJ. Bruce Fields */ 1850edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 1851edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 1852edd76786SJ. Bruce Fields } 1853ec6b5d7bSAndy Adamson } 1854ec6b5d7bSAndy Adamson 18559089f1b4SBenny Halevy /* caller must hold client_lock */ 18565282fd72SMarc Eshel static struct nfsd4_session * 1857d4e19e70STrond Myklebust __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) 18585282fd72SMarc Eshel { 18595282fd72SMarc Eshel struct nfsd4_session *elem; 18605282fd72SMarc Eshel int idx; 18611872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 18625282fd72SMarc Eshel 18630a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 18640a880a28STrond Myklebust 18655282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 18665282fd72SMarc Eshel idx = hash_sessionid(sessionid); 18675282fd72SMarc Eshel /* Search in the appropriate list */ 18681872de0eSStanislav Kinsbursky list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { 18695282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 18705282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 18715282fd72SMarc Eshel return elem; 18725282fd72SMarc Eshel } 18735282fd72SMarc Eshel } 18745282fd72SMarc Eshel 18755282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 18765282fd72SMarc Eshel return NULL; 18775282fd72SMarc Eshel } 18785282fd72SMarc Eshel 1879d4e19e70STrond Myklebust static struct nfsd4_session * 1880d4e19e70STrond Myklebust find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, 1881d4e19e70STrond Myklebust __be32 *ret) 1882d4e19e70STrond Myklebust { 1883d4e19e70STrond Myklebust struct nfsd4_session *session; 1884d4e19e70STrond Myklebust __be32 status = nfserr_badsession; 1885d4e19e70STrond Myklebust 1886d4e19e70STrond Myklebust session = __find_in_sessionid_hashtbl(sessionid, net); 1887d4e19e70STrond Myklebust if (!session) 1888d4e19e70STrond Myklebust goto out; 1889d4e19e70STrond Myklebust status = nfsd4_get_session_locked(session); 1890d4e19e70STrond Myklebust if (status) 1891d4e19e70STrond Myklebust session = NULL; 1892d4e19e70STrond Myklebust out: 1893d4e19e70STrond Myklebust *ret = status; 1894d4e19e70STrond Myklebust return session; 1895d4e19e70STrond Myklebust } 1896d4e19e70STrond Myklebust 18979089f1b4SBenny Halevy /* caller must hold client_lock */ 18987116ed6bSAndy Adamson static void 18995282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 19007116ed6bSAndy Adamson { 19010a880a28STrond Myklebust struct nfs4_client *clp = ses->se_client; 19020a880a28STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 19030a880a28STrond Myklebust 19040a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 19050a880a28STrond Myklebust 19067116ed6bSAndy Adamson list_del(&ses->se_hash); 19074c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 19087116ed6bSAndy Adamson list_del(&ses->se_perclnt); 19094c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 19105282fd72SMarc Eshel } 19115282fd72SMarc Eshel 19121da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 19131da177e4SLinus Torvalds static int 19142c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 19151da177e4SLinus Torvalds { 1916bbc7f33aSJ. Bruce Fields /* 1917bbc7f33aSJ. Bruce Fields * We're assuming the clid was not given out from a boot 1918bbc7f33aSJ. Bruce Fields * precisely 2^32 (about 136 years) before this one. That seems 1919bbc7f33aSJ. Bruce Fields * a safe assumption: 1920bbc7f33aSJ. Bruce Fields */ 1921bbc7f33aSJ. Bruce Fields if (clid->cl_boot == (u32)nn->boot_time) 19221da177e4SLinus Torvalds return 0; 1923dd5e3fbcSChuck Lever trace_nfsd_clid_stale(clid); 19241da177e4SLinus Torvalds return 1; 19251da177e4SLinus Torvalds } 19261da177e4SLinus Torvalds 19271da177e4SLinus Torvalds /* 19281da177e4SLinus Torvalds * XXX Should we use a slab cache ? 19291da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 19301da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 19311da177e4SLinus Torvalds */ 193235bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 19331da177e4SLinus Torvalds { 19341da177e4SLinus Torvalds struct nfs4_client *clp; 1935d4f0489fSTrond Myklebust int i; 19361da177e4SLinus Torvalds 19379258a2d5SJeff Layton clp = kmem_cache_zalloc(client_slab, GFP_KERNEL); 193835bba9a3SJ. Bruce Fields if (clp == NULL) 193935bba9a3SJ. Bruce Fields return NULL; 19406f4859b8SJ. Bruce Fields xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL); 1941d4f0489fSTrond Myklebust if (clp->cl_name.data == NULL) 1942d4f0489fSTrond Myklebust goto err_no_name; 19436da2ec56SKees Cook clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE, 19446da2ec56SKees Cook sizeof(struct list_head), 19456da2ec56SKees Cook GFP_KERNEL); 1946d4f0489fSTrond Myklebust if (!clp->cl_ownerstr_hashtbl) 1947d4f0489fSTrond Myklebust goto err_no_hashtbl; 1948d4f0489fSTrond Myklebust for (i = 0; i < OWNER_HASH_SIZE; i++) 1949d4f0489fSTrond Myklebust INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]); 19505694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_sessions); 19515694c93eSTrond Myklebust idr_init(&clp->cl_stateids); 195214ed14ccSJ. Bruce Fields atomic_set(&clp->cl_rpc_users, 0); 19535694c93eSTrond Myklebust clp->cl_cb_state = NFSD4_CB_UNKNOWN; 19545694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_idhash); 19555694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_openowners); 19565694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_delegations); 19575694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_lru); 19585694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_revoked); 19599cf514ccSChristoph Hellwig #ifdef CONFIG_NFSD_PNFS 19609cf514ccSChristoph Hellwig INIT_LIST_HEAD(&clp->cl_lo_states); 19619cf514ccSChristoph Hellwig #endif 1962e0639dc5SOlga Kornievskaia INIT_LIST_HEAD(&clp->async_copies); 1963e0639dc5SOlga Kornievskaia spin_lock_init(&clp->async_lock); 19645694c93eSTrond Myklebust spin_lock_init(&clp->cl_lock); 19655694c93eSTrond Myklebust rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 19661da177e4SLinus Torvalds return clp; 1967d4f0489fSTrond Myklebust err_no_hashtbl: 1968d4f0489fSTrond Myklebust kfree(clp->cl_name.data); 1969d4f0489fSTrond Myklebust err_no_name: 19709258a2d5SJeff Layton kmem_cache_free(client_slab, clp); 1971d4f0489fSTrond Myklebust return NULL; 19721da177e4SLinus Torvalds } 19731da177e4SLinus Torvalds 197459f8e91bSJ. Bruce Fields static void __free_client(struct kref *k) 197559f8e91bSJ. Bruce Fields { 1976e8a79fb1SJ. Bruce Fields struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref); 1977e8a79fb1SJ. Bruce Fields struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs); 197859f8e91bSJ. Bruce Fields 197959f8e91bSJ. Bruce Fields free_svc_cred(&clp->cl_cred); 198059f8e91bSJ. Bruce Fields kfree(clp->cl_ownerstr_hashtbl); 198159f8e91bSJ. Bruce Fields kfree(clp->cl_name.data); 198279123444SJ. Bruce Fields kfree(clp->cl_nii_domain.data); 198379123444SJ. Bruce Fields kfree(clp->cl_nii_name.data); 198459f8e91bSJ. Bruce Fields idr_destroy(&clp->cl_stateids); 198559f8e91bSJ. Bruce Fields kmem_cache_free(client_slab, clp); 198659f8e91bSJ. Bruce Fields } 198759f8e91bSJ. Bruce Fields 1988297e57a2SYueHaibing static void drop_client(struct nfs4_client *clp) 198959f8e91bSJ. Bruce Fields { 1990e8a79fb1SJ. Bruce Fields kref_put(&clp->cl_nfsdfs.cl_ref, __free_client); 199159f8e91bSJ. Bruce Fields } 199259f8e91bSJ. Bruce Fields 19934dd86e15STrond Myklebust static void 19941da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 19951da177e4SLinus Torvalds { 1996792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1997792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1998792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1999792c95ddSJ. Bruce Fields se_perclnt); 2000792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 200166b2b9b2SJ. Bruce Fields WARN_ON_ONCE(atomic_read(&ses->se_ref)); 200266b2b9b2SJ. Bruce Fields free_session(ses); 2003792c95ddSJ. Bruce Fields } 20044cb57e30STrond Myklebust rpc_destroy_wait_queue(&clp->cl_cb_waitq); 200589c905beSJ. Bruce Fields if (clp->cl_nfsd_dentry) { 2006e8a79fb1SJ. Bruce Fields nfsd_client_rmdir(clp->cl_nfsd_dentry); 200789c905beSJ. Bruce Fields clp->cl_nfsd_dentry = NULL; 200889c905beSJ. Bruce Fields wake_up_all(&expiry_wq); 200989c905beSJ. Bruce Fields } 201059f8e91bSJ. Bruce Fields drop_client(clp); 20111da177e4SLinus Torvalds } 20121da177e4SLinus Torvalds 201384d38ac9SBenny Halevy /* must be called under the client_lock */ 20144beb345bSTrond Myklebust static void 201584d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 201684d38ac9SBenny Halevy { 20174beb345bSTrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 2018792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 2019792c95ddSJ. Bruce Fields 20200a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 20210a880a28STrond Myklebust 20224beb345bSTrond Myklebust /* Mark the client as expired! */ 20234beb345bSTrond Myklebust clp->cl_time = 0; 20244beb345bSTrond Myklebust /* Make it invisible */ 20254beb345bSTrond Myklebust if (!list_empty(&clp->cl_idhash)) { 20264beb345bSTrond Myklebust list_del_init(&clp->cl_idhash); 20274beb345bSTrond Myklebust if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) 20284beb345bSTrond Myklebust rb_erase(&clp->cl_namenode, &nn->conf_name_tree); 20294beb345bSTrond Myklebust else 20304beb345bSTrond Myklebust rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 20314beb345bSTrond Myklebust } 20324beb345bSTrond Myklebust list_del_init(&clp->cl_lru); 20334c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 2034792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 2035792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 20364c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 203784d38ac9SBenny Halevy } 203884d38ac9SBenny Halevy 20391da177e4SLinus Torvalds static void 20404beb345bSTrond Myklebust unhash_client(struct nfs4_client *clp) 20414beb345bSTrond Myklebust { 20424beb345bSTrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 20434beb345bSTrond Myklebust 20444beb345bSTrond Myklebust spin_lock(&nn->client_lock); 20454beb345bSTrond Myklebust unhash_client_locked(clp); 20464beb345bSTrond Myklebust spin_unlock(&nn->client_lock); 20474beb345bSTrond Myklebust } 20484beb345bSTrond Myklebust 204997403d95SJeff Layton static __be32 mark_client_expired_locked(struct nfs4_client *clp) 205097403d95SJeff Layton { 205114ed14ccSJ. Bruce Fields if (atomic_read(&clp->cl_rpc_users)) 205297403d95SJeff Layton return nfserr_jukebox; 205397403d95SJeff Layton unhash_client_locked(clp); 205497403d95SJeff Layton return nfs_ok; 205597403d95SJeff Layton } 205697403d95SJeff Layton 20574beb345bSTrond Myklebust static void 20584beb345bSTrond Myklebust __destroy_client(struct nfs4_client *clp) 20591da177e4SLinus Torvalds { 206068ef3bc3SJeff Layton int i; 2061fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 20621da177e4SLinus Torvalds struct nfs4_delegation *dp; 20631da177e4SLinus Torvalds struct list_head reaplist; 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 2066cdc97505SBenny Halevy spin_lock(&state_lock); 2067ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 2068ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 20693fcbbd24SJeff Layton WARN_ON(!unhash_delegation_locked(dp)); 207042690676SJeff Layton list_add(&dp->dl_recall_lru, &reaplist); 20711da177e4SLinus Torvalds } 2072cdc97505SBenny Halevy spin_unlock(&state_lock); 20731da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 20741da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 207542690676SJeff Layton list_del_init(&dp->dl_recall_lru); 20760af6e690SJ. Bruce Fields destroy_unhashed_deleg(dp); 20771da177e4SLinus Torvalds } 20782d4a532dSJeff Layton while (!list_empty(&clp->cl_revoked)) { 2079c876486bSAndrew Elble dp = list_entry(clp->cl_revoked.next, struct nfs4_delegation, dl_recall_lru); 20802d4a532dSJeff Layton list_del_init(&dp->dl_recall_lru); 20816011695dSTrond Myklebust nfs4_put_stid(&dp->dl_stid); 2082956c4feeSBenny Halevy } 2083ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 2084fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 2085b5971afaSKinglong Mee nfs4_get_stateowner(&oo->oo_owner); 2086fe0750e5SJ. Bruce Fields release_openowner(oo); 20871da177e4SLinus Torvalds } 208868ef3bc3SJeff Layton for (i = 0; i < OWNER_HASH_SIZE; i++) { 208968ef3bc3SJeff Layton struct nfs4_stateowner *so, *tmp; 209068ef3bc3SJeff Layton 209168ef3bc3SJeff Layton list_for_each_entry_safe(so, tmp, &clp->cl_ownerstr_hashtbl[i], 209268ef3bc3SJeff Layton so_strhash) { 209368ef3bc3SJeff Layton /* Should be no openowners at this point */ 209468ef3bc3SJeff Layton WARN_ON_ONCE(so->so_is_open_owner); 209568ef3bc3SJeff Layton remove_blocked_locks(lockowner(so)); 209668ef3bc3SJeff Layton } 209768ef3bc3SJeff Layton } 20989cf514ccSChristoph Hellwig nfsd4_return_all_client_layouts(clp); 2099e0639dc5SOlga Kornievskaia nfsd4_shutdown_copy(clp); 21006ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 21012bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 21022bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 2103b12a05cbSJ. Bruce Fields free_client(clp); 210489c905beSJ. Bruce Fields wake_up_all(&expiry_wq); 21051da177e4SLinus Torvalds } 21061da177e4SLinus Torvalds 21074beb345bSTrond Myklebust static void 21084beb345bSTrond Myklebust destroy_client(struct nfs4_client *clp) 21094beb345bSTrond Myklebust { 21104beb345bSTrond Myklebust unhash_client(clp); 21114beb345bSTrond Myklebust __destroy_client(clp); 21124beb345bSTrond Myklebust } 21134beb345bSTrond Myklebust 2114362063a5SScott Mayhew static void inc_reclaim_complete(struct nfs4_client *clp) 2115362063a5SScott Mayhew { 2116362063a5SScott Mayhew struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 2117362063a5SScott Mayhew 2118362063a5SScott Mayhew if (!nn->track_reclaim_completes) 2119362063a5SScott Mayhew return; 2120362063a5SScott Mayhew if (!nfsd4_find_reclaim_client(clp->cl_name, nn)) 2121362063a5SScott Mayhew return; 2122362063a5SScott Mayhew if (atomic_inc_return(&nn->nr_reclaim_complete) == 2123362063a5SScott Mayhew nn->reclaim_str_hashtbl_size) { 2124362063a5SScott Mayhew printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n", 2125362063a5SScott Mayhew clp->net->ns.inum); 2126362063a5SScott Mayhew nfsd4_end_grace(nn); 2127362063a5SScott Mayhew } 2128362063a5SScott Mayhew } 2129362063a5SScott Mayhew 21300d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 21310d22f68fSJ. Bruce Fields { 21324beb345bSTrond Myklebust unhash_client(clp); 21330d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 21344beb345bSTrond Myklebust __destroy_client(clp); 21350d22f68fSJ. Bruce Fields } 21360d22f68fSJ. Bruce Fields 213735bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 213835bba9a3SJ. Bruce Fields { 213935bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 214035bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 21411da177e4SLinus Torvalds } 21421da177e4SLinus Torvalds 214335bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 214435bba9a3SJ. Bruce Fields { 21451da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 21461da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 21471da177e4SLinus Torvalds } 21481da177e4SLinus Torvalds 214950043859SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 215050043859SJ. Bruce Fields { 21512f10fdcbSNeilBrown target->cr_principal = kstrdup(source->cr_principal, GFP_KERNEL); 21522f10fdcbSNeilBrown target->cr_raw_principal = kstrdup(source->cr_raw_principal, 21532f10fdcbSNeilBrown GFP_KERNEL); 21549abdda5dSChuck Lever target->cr_targ_princ = kstrdup(source->cr_targ_princ, GFP_KERNEL); 21552f10fdcbSNeilBrown if ((source->cr_principal && !target->cr_principal) || 21569abdda5dSChuck Lever (source->cr_raw_principal && !target->cr_raw_principal) || 21579abdda5dSChuck Lever (source->cr_targ_princ && !target->cr_targ_princ)) 21582f10fdcbSNeilBrown return -ENOMEM; 215950043859SJ. Bruce Fields 2160d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 21611da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 21621da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 21631da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 21641da177e4SLinus Torvalds get_group_info(target->cr_group_info); 21650dc1531aSJ. Bruce Fields target->cr_gss_mech = source->cr_gss_mech; 21660dc1531aSJ. Bruce Fields if (source->cr_gss_mech) 21670dc1531aSJ. Bruce Fields gss_mech_get(source->cr_gss_mech); 216803a4e1f6SJ. Bruce Fields return 0; 21691da177e4SLinus Torvalds } 21701da177e4SLinus Torvalds 2171ef17af2aSRasmus Villemoes static int 2172ac55fdc4SJeff Layton compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) 2173ac55fdc4SJeff Layton { 2174ef17af2aSRasmus Villemoes if (o1->len < o2->len) 2175ef17af2aSRasmus Villemoes return -1; 2176ef17af2aSRasmus Villemoes if (o1->len > o2->len) 2177ef17af2aSRasmus Villemoes return 1; 2178ef17af2aSRasmus Villemoes return memcmp(o1->data, o2->data, o1->len); 2179ac55fdc4SJeff Layton } 2180ac55fdc4SJeff Layton 21811da177e4SLinus Torvalds static int 2182599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 2183599e0a22SJ. Bruce Fields { 2184599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 21851da177e4SLinus Torvalds } 21861da177e4SLinus Torvalds 21871da177e4SLinus Torvalds static int 2188599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 2189599e0a22SJ. Bruce Fields { 2190599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 21911da177e4SLinus Torvalds } 21921da177e4SLinus Torvalds 21938fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 21948fbba96eSJ. Bruce Fields { 21958fbba96eSJ. Bruce Fields int i; 21968fbba96eSJ. Bruce Fields 21978fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 21988fbba96eSJ. Bruce Fields return false; 21998fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 220081243eacSAlexey Dobriyan if (!gid_eq(g1->gid[i], g2->gid[i])) 22018fbba96eSJ. Bruce Fields return false; 22028fbba96eSJ. Bruce Fields return true; 22038fbba96eSJ. Bruce Fields } 22048fbba96eSJ. Bruce Fields 220568eb3508SJ. Bruce Fields /* 220668eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 220768eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 220868eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 220968eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 221068eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 221168eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 221268eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 221368eb3508SJ. Bruce Fields */ 221468eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 221568eb3508SJ. Bruce Fields { 221668eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 221768eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 221868eb3508SJ. Bruce Fields } 221968eb3508SJ. Bruce Fields 222068eb3508SJ. Bruce Fields 22215559b50aSVivek Trivedi static bool 2222599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 2223599e0a22SJ. Bruce Fields { 222468eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 22256fab8779SEric W. Biederman || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) 22266fab8779SEric W. Biederman || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) 22278fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 22288fbba96eSJ. Bruce Fields return false; 22299abdda5dSChuck Lever /* XXX: check that cr_targ_princ fields match ? */ 22308fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 22318fbba96eSJ. Bruce Fields return true; 22328fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 22338fbba96eSJ. Bruce Fields return false; 22345559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 22351da177e4SLinus Torvalds } 22361da177e4SLinus Torvalds 223757266a6eSJ. Bruce Fields static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) 223857266a6eSJ. Bruce Fields { 223957266a6eSJ. Bruce Fields struct svc_cred *cr = &rqstp->rq_cred; 224057266a6eSJ. Bruce Fields u32 service; 224157266a6eSJ. Bruce Fields 2242c4720591SJ. Bruce Fields if (!cr->cr_gss_mech) 2243c4720591SJ. Bruce Fields return false; 224457266a6eSJ. Bruce Fields service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); 224557266a6eSJ. Bruce Fields return service == RPC_GSS_SVC_INTEGRITY || 224657266a6eSJ. Bruce Fields service == RPC_GSS_SVC_PRIVACY; 224757266a6eSJ. Bruce Fields } 224857266a6eSJ. Bruce Fields 2249dedeb13fSAndrew Elble bool nfsd4_mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) 225057266a6eSJ. Bruce Fields { 225157266a6eSJ. Bruce Fields struct svc_cred *cr = &rqstp->rq_cred; 225257266a6eSJ. Bruce Fields 225357266a6eSJ. Bruce Fields if (!cl->cl_mach_cred) 225457266a6eSJ. Bruce Fields return true; 225557266a6eSJ. Bruce Fields if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) 225657266a6eSJ. Bruce Fields return false; 225757266a6eSJ. Bruce Fields if (!svc_rqst_integrity_protected(rqstp)) 225857266a6eSJ. Bruce Fields return false; 2259414ca017SJ. Bruce Fields if (cl->cl_cred.cr_raw_principal) 2260414ca017SJ. Bruce Fields return 0 == strcmp(cl->cl_cred.cr_raw_principal, 2261414ca017SJ. Bruce Fields cr->cr_raw_principal); 226257266a6eSJ. Bruce Fields if (!cr->cr_principal) 226357266a6eSJ. Bruce Fields return false; 226457266a6eSJ. Bruce Fields return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); 226557266a6eSJ. Bruce Fields } 226657266a6eSJ. Bruce Fields 2267294ac32eSJeff Layton static void gen_confirm(struct nfs4_client *clp, struct nfsd_net *nn) 2268deda2faaSJ. Bruce Fields { 2269ab4684d1SChuck Lever __be32 verf[2]; 22701da177e4SLinus Torvalds 2271f419992cSJeff Layton /* 2272f419992cSJeff Layton * This is opaque to client, so no need to byte-swap. Use 2273f419992cSJeff Layton * __force to keep sparse happy 2274f419992cSJeff Layton */ 22759104ae49SArnd Bergmann verf[0] = (__force __be32)(u32)ktime_get_real_seconds(); 227619311aa8SKinglong Mee verf[1] = (__force __be32)nn->clverifier_counter++; 2277ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 22781da177e4SLinus Torvalds } 22791da177e4SLinus Torvalds 2280294ac32eSJeff Layton static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) 2281294ac32eSJeff Layton { 22829cc76801SArnd Bergmann clp->cl_clientid.cl_boot = (u32)nn->boot_time; 2283294ac32eSJeff Layton clp->cl_clientid.cl_id = nn->clientid_counter++; 2284294ac32eSJeff Layton gen_confirm(clp, nn); 2285294ac32eSJeff Layton } 2286294ac32eSJeff Layton 22874770d722SJeff Layton static struct nfs4_stid * 22884770d722SJeff Layton find_stateid_locked(struct nfs4_client *cl, stateid_t *t) 22894581d140SJ. Bruce Fields { 22903abdb607SJ. Bruce Fields struct nfs4_stid *ret; 22913abdb607SJ. Bruce Fields 22923abdb607SJ. Bruce Fields ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); 22933abdb607SJ. Bruce Fields if (!ret || !ret->sc_type) 22943abdb607SJ. Bruce Fields return NULL; 22953abdb607SJ. Bruce Fields return ret; 22964581d140SJ. Bruce Fields } 22974d71ab87SJ. Bruce Fields 22984770d722SJeff Layton static struct nfs4_stid * 22994770d722SJeff Layton find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 2300f459e453SJ. Bruce Fields { 2301f459e453SJ. Bruce Fields struct nfs4_stid *s; 2302f459e453SJ. Bruce Fields 23034770d722SJeff Layton spin_lock(&cl->cl_lock); 23044770d722SJeff Layton s = find_stateid_locked(cl, t); 23052d3f9668STrond Myklebust if (s != NULL) { 23062d3f9668STrond Myklebust if (typemask & s->sc_type) 2307a15dfcd5SElena Reshetova refcount_inc(&s->sc_count); 23082d3f9668STrond Myklebust else 23094770d722SJeff Layton s = NULL; 23102d3f9668STrond Myklebust } 23114770d722SJeff Layton spin_unlock(&cl->cl_lock); 23124d71ab87SJ. Bruce Fields return s; 23134581d140SJ. Bruce Fields } 23144581d140SJ. Bruce Fields 2315a204f25eSJ. Bruce Fields static struct nfs4_client *get_nfsdfs_clp(struct inode *inode) 2316a204f25eSJ. Bruce Fields { 2317a204f25eSJ. Bruce Fields struct nfsdfs_client *nc; 2318a204f25eSJ. Bruce Fields nc = get_nfsdfs_client(inode); 2319a204f25eSJ. Bruce Fields if (!nc) 2320a204f25eSJ. Bruce Fields return NULL; 2321a204f25eSJ. Bruce Fields return container_of(nc, struct nfs4_client, cl_nfsdfs); 2322a204f25eSJ. Bruce Fields } 2323a204f25eSJ. Bruce Fields 2324169319f1SJ. Bruce Fields static void seq_quote_mem(struct seq_file *m, char *data, int len) 2325169319f1SJ. Bruce Fields { 2326169319f1SJ. Bruce Fields seq_printf(m, "\""); 2327169319f1SJ. Bruce Fields seq_escape_mem_ascii(m, data, len); 2328169319f1SJ. Bruce Fields seq_printf(m, "\""); 2329169319f1SJ. Bruce Fields } 2330169319f1SJ. Bruce Fields 233197ad4031SJ. Bruce Fields static int client_info_show(struct seq_file *m, void *v) 233297ad4031SJ. Bruce Fields { 233397ad4031SJ. Bruce Fields struct inode *inode = m->private; 233497ad4031SJ. Bruce Fields struct nfs4_client *clp; 233597ad4031SJ. Bruce Fields u64 clid; 233697ad4031SJ. Bruce Fields 2337a204f25eSJ. Bruce Fields clp = get_nfsdfs_clp(inode); 2338a204f25eSJ. Bruce Fields if (!clp) 233997ad4031SJ. Bruce Fields return -ENXIO; 234097ad4031SJ. Bruce Fields memcpy(&clid, &clp->cl_clientid, sizeof(clid)); 234197ad4031SJ. Bruce Fields seq_printf(m, "clientid: 0x%llx\n", clid); 2342169319f1SJ. Bruce Fields seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr); 2343169319f1SJ. Bruce Fields seq_printf(m, "name: "); 2344169319f1SJ. Bruce Fields seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len); 2345169319f1SJ. Bruce Fields seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion); 234679123444SJ. Bruce Fields if (clp->cl_nii_domain.data) { 234779123444SJ. Bruce Fields seq_printf(m, "Implementation domain: "); 234879123444SJ. Bruce Fields seq_quote_mem(m, clp->cl_nii_domain.data, 234979123444SJ. Bruce Fields clp->cl_nii_domain.len); 235079123444SJ. Bruce Fields seq_printf(m, "\nImplementation name: "); 235179123444SJ. Bruce Fields seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len); 2352e29f4703SArnd Bergmann seq_printf(m, "\nImplementation time: [%lld, %ld]\n", 235379123444SJ. Bruce Fields clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec); 235479123444SJ. Bruce Fields } 235597ad4031SJ. Bruce Fields drop_client(clp); 235697ad4031SJ. Bruce Fields 235797ad4031SJ. Bruce Fields return 0; 235897ad4031SJ. Bruce Fields } 235997ad4031SJ. Bruce Fields 236097ad4031SJ. Bruce Fields static int client_info_open(struct inode *inode, struct file *file) 236197ad4031SJ. Bruce Fields { 236297ad4031SJ. Bruce Fields return single_open(file, client_info_show, inode); 236397ad4031SJ. Bruce Fields } 236497ad4031SJ. Bruce Fields 236597ad4031SJ. Bruce Fields static const struct file_operations client_info_fops = { 236697ad4031SJ. Bruce Fields .open = client_info_open, 236797ad4031SJ. Bruce Fields .read = seq_read, 236897ad4031SJ. Bruce Fields .llseek = seq_lseek, 236997ad4031SJ. Bruce Fields .release = single_release, 237097ad4031SJ. Bruce Fields }; 237197ad4031SJ. Bruce Fields 237278599c42SJ. Bruce Fields static void *states_start(struct seq_file *s, loff_t *pos) 237378599c42SJ. Bruce Fields __acquires(&clp->cl_lock) 237478599c42SJ. Bruce Fields { 237578599c42SJ. Bruce Fields struct nfs4_client *clp = s->private; 237678599c42SJ. Bruce Fields unsigned long id = *pos; 237778599c42SJ. Bruce Fields void *ret; 237878599c42SJ. Bruce Fields 237978599c42SJ. Bruce Fields spin_lock(&clp->cl_lock); 238078599c42SJ. Bruce Fields ret = idr_get_next_ul(&clp->cl_stateids, &id); 238178599c42SJ. Bruce Fields *pos = id; 238278599c42SJ. Bruce Fields return ret; 238378599c42SJ. Bruce Fields } 238478599c42SJ. Bruce Fields 238578599c42SJ. Bruce Fields static void *states_next(struct seq_file *s, void *v, loff_t *pos) 238678599c42SJ. Bruce Fields { 238778599c42SJ. Bruce Fields struct nfs4_client *clp = s->private; 238878599c42SJ. Bruce Fields unsigned long id = *pos; 238978599c42SJ. Bruce Fields void *ret; 239078599c42SJ. Bruce Fields 239178599c42SJ. Bruce Fields id = *pos; 239278599c42SJ. Bruce Fields id++; 239378599c42SJ. Bruce Fields ret = idr_get_next_ul(&clp->cl_stateids, &id); 239478599c42SJ. Bruce Fields *pos = id; 239578599c42SJ. Bruce Fields return ret; 239678599c42SJ. Bruce Fields } 239778599c42SJ. Bruce Fields 239878599c42SJ. Bruce Fields static void states_stop(struct seq_file *s, void *v) 239978599c42SJ. Bruce Fields __releases(&clp->cl_lock) 240078599c42SJ. Bruce Fields { 240178599c42SJ. Bruce Fields struct nfs4_client *clp = s->private; 240278599c42SJ. Bruce Fields 240378599c42SJ. Bruce Fields spin_unlock(&clp->cl_lock); 240478599c42SJ. Bruce Fields } 240578599c42SJ. Bruce Fields 2406fd4f83fdSJeff Layton static void nfs4_show_superblock(struct seq_file *s, struct nfsd_file *f) 240778599c42SJ. Bruce Fields { 2408fd4f83fdSJeff Layton struct inode *inode = f->nf_inode; 240978599c42SJ. Bruce Fields 241078599c42SJ. Bruce Fields seq_printf(s, "superblock: \"%02x:%02x:%ld\"", 241178599c42SJ. Bruce Fields MAJOR(inode->i_sb->s_dev), 241278599c42SJ. Bruce Fields MINOR(inode->i_sb->s_dev), 241378599c42SJ. Bruce Fields inode->i_ino); 241478599c42SJ. Bruce Fields } 241578599c42SJ. Bruce Fields 241678599c42SJ. Bruce Fields static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo) 241778599c42SJ. Bruce Fields { 241878599c42SJ. Bruce Fields seq_printf(s, "owner: "); 241978599c42SJ. Bruce Fields seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len); 242078599c42SJ. Bruce Fields } 242178599c42SJ. Bruce Fields 242278599c42SJ. Bruce Fields static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st) 242378599c42SJ. Bruce Fields { 242478599c42SJ. Bruce Fields struct nfs4_ol_stateid *ols; 242578599c42SJ. Bruce Fields struct nfs4_file *nf; 2426fd4f83fdSJeff Layton struct nfsd_file *file; 242778599c42SJ. Bruce Fields struct nfs4_stateowner *oo; 242878599c42SJ. Bruce Fields unsigned int access, deny; 242978599c42SJ. Bruce Fields 243078599c42SJ. Bruce Fields if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID) 243178599c42SJ. Bruce Fields return 0; /* XXX: or SEQ_SKIP? */ 243278599c42SJ. Bruce Fields ols = openlockstateid(st); 243378599c42SJ. Bruce Fields oo = ols->st_stateowner; 243478599c42SJ. Bruce Fields nf = st->sc_file; 243578599c42SJ. Bruce Fields file = find_any_file(nf); 243678599c42SJ. Bruce Fields 243778599c42SJ. Bruce Fields seq_printf(s, "- 0x%16phN: { type: open, ", &st->sc_stateid); 243878599c42SJ. Bruce Fields 243978599c42SJ. Bruce Fields access = bmap_to_share_mode(ols->st_access_bmap); 244078599c42SJ. Bruce Fields deny = bmap_to_share_mode(ols->st_deny_bmap); 244178599c42SJ. Bruce Fields 2442c4b77edbSJ. Bruce Fields seq_printf(s, "access: %s%s, ", 244378599c42SJ. Bruce Fields access & NFS4_SHARE_ACCESS_READ ? "r" : "-", 244478599c42SJ. Bruce Fields access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); 2445c4b77edbSJ. Bruce Fields seq_printf(s, "deny: %s%s, ", 244678599c42SJ. Bruce Fields deny & NFS4_SHARE_ACCESS_READ ? "r" : "-", 244778599c42SJ. Bruce Fields deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-"); 244878599c42SJ. Bruce Fields 244978599c42SJ. Bruce Fields nfs4_show_superblock(s, file); 245078599c42SJ. Bruce Fields seq_printf(s, ", "); 245178599c42SJ. Bruce Fields nfs4_show_owner(s, oo); 245278599c42SJ. Bruce Fields seq_printf(s, " }\n"); 2453fd4f83fdSJeff Layton nfsd_file_put(file); 245478599c42SJ. Bruce Fields 245578599c42SJ. Bruce Fields return 0; 245678599c42SJ. Bruce Fields } 245778599c42SJ. Bruce Fields 245816d36e09SJ. Bruce Fields static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st) 245916d36e09SJ. Bruce Fields { 246016d36e09SJ. Bruce Fields struct nfs4_ol_stateid *ols; 246116d36e09SJ. Bruce Fields struct nfs4_file *nf; 2462fd4f83fdSJeff Layton struct nfsd_file *file; 246316d36e09SJ. Bruce Fields struct nfs4_stateowner *oo; 246416d36e09SJ. Bruce Fields 246516d36e09SJ. Bruce Fields ols = openlockstateid(st); 246616d36e09SJ. Bruce Fields oo = ols->st_stateowner; 246716d36e09SJ. Bruce Fields nf = st->sc_file; 246816d36e09SJ. Bruce Fields file = find_any_file(nf); 246916d36e09SJ. Bruce Fields 247016d36e09SJ. Bruce Fields seq_printf(s, "- 0x%16phN: { type: lock, ", &st->sc_stateid); 247116d36e09SJ. Bruce Fields 247216d36e09SJ. Bruce Fields /* 247316d36e09SJ. Bruce Fields * Note: a lock stateid isn't really the same thing as a lock, 247416d36e09SJ. Bruce Fields * it's the locking state held by one owner on a file, and there 247516d36e09SJ. Bruce Fields * may be multiple (or no) lock ranges associated with it. 247616d36e09SJ. Bruce Fields * (Same for the matter is true of open stateids.) 247716d36e09SJ. Bruce Fields */ 247816d36e09SJ. Bruce Fields 247916d36e09SJ. Bruce Fields nfs4_show_superblock(s, file); 248016d36e09SJ. Bruce Fields /* XXX: open stateid? */ 248116d36e09SJ. Bruce Fields seq_printf(s, ", "); 248216d36e09SJ. Bruce Fields nfs4_show_owner(s, oo); 248316d36e09SJ. Bruce Fields seq_printf(s, " }\n"); 2484fd4f83fdSJeff Layton nfsd_file_put(file); 248516d36e09SJ. Bruce Fields 248616d36e09SJ. Bruce Fields return 0; 248716d36e09SJ. Bruce Fields } 248816d36e09SJ. Bruce Fields 248916d36e09SJ. Bruce Fields static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st) 249016d36e09SJ. Bruce Fields { 249116d36e09SJ. Bruce Fields struct nfs4_delegation *ds; 249216d36e09SJ. Bruce Fields struct nfs4_file *nf; 2493eb82dd39SJeff Layton struct nfsd_file *file; 249416d36e09SJ. Bruce Fields 249516d36e09SJ. Bruce Fields ds = delegstateid(st); 249616d36e09SJ. Bruce Fields nf = st->sc_file; 249716d36e09SJ. Bruce Fields file = nf->fi_deleg_file; 249816d36e09SJ. Bruce Fields 249916d36e09SJ. Bruce Fields seq_printf(s, "- 0x%16phN: { type: deleg, ", &st->sc_stateid); 250016d36e09SJ. Bruce Fields 250116d36e09SJ. Bruce Fields /* Kinda dead code as long as we only support read delegs: */ 250216d36e09SJ. Bruce Fields seq_printf(s, "access: %s, ", 250316d36e09SJ. Bruce Fields ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w"); 250416d36e09SJ. Bruce Fields 250516d36e09SJ. Bruce Fields /* XXX: lease time, whether it's being recalled. */ 250616d36e09SJ. Bruce Fields 250716d36e09SJ. Bruce Fields nfs4_show_superblock(s, file); 250816d36e09SJ. Bruce Fields seq_printf(s, " }\n"); 250916d36e09SJ. Bruce Fields 251016d36e09SJ. Bruce Fields return 0; 251116d36e09SJ. Bruce Fields } 251216d36e09SJ. Bruce Fields 25130c4b62b0SJ. Bruce Fields static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st) 25140c4b62b0SJ. Bruce Fields { 25150c4b62b0SJ. Bruce Fields struct nfs4_layout_stateid *ls; 2516eb82dd39SJeff Layton struct nfsd_file *file; 25170c4b62b0SJ. Bruce Fields 25180c4b62b0SJ. Bruce Fields ls = container_of(st, struct nfs4_layout_stateid, ls_stid); 25190c4b62b0SJ. Bruce Fields file = ls->ls_file; 25200c4b62b0SJ. Bruce Fields 25210c4b62b0SJ. Bruce Fields seq_printf(s, "- 0x%16phN: { type: layout, ", &st->sc_stateid); 25220c4b62b0SJ. Bruce Fields 25230c4b62b0SJ. Bruce Fields /* XXX: What else would be useful? */ 25240c4b62b0SJ. Bruce Fields 25250c4b62b0SJ. Bruce Fields nfs4_show_superblock(s, file); 25260c4b62b0SJ. Bruce Fields seq_printf(s, " }\n"); 25270c4b62b0SJ. Bruce Fields 25280c4b62b0SJ. Bruce Fields return 0; 25290c4b62b0SJ. Bruce Fields } 25300c4b62b0SJ. Bruce Fields 253178599c42SJ. Bruce Fields static int states_show(struct seq_file *s, void *v) 253278599c42SJ. Bruce Fields { 253378599c42SJ. Bruce Fields struct nfs4_stid *st = v; 253478599c42SJ. Bruce Fields 253578599c42SJ. Bruce Fields switch (st->sc_type) { 253678599c42SJ. Bruce Fields case NFS4_OPEN_STID: 253778599c42SJ. Bruce Fields return nfs4_show_open(s, st); 253816d36e09SJ. Bruce Fields case NFS4_LOCK_STID: 253916d36e09SJ. Bruce Fields return nfs4_show_lock(s, st); 254016d36e09SJ. Bruce Fields case NFS4_DELEG_STID: 254116d36e09SJ. Bruce Fields return nfs4_show_deleg(s, st); 25420c4b62b0SJ. Bruce Fields case NFS4_LAYOUT_STID: 25430c4b62b0SJ. Bruce Fields return nfs4_show_layout(s, st); 254478599c42SJ. Bruce Fields default: 254578599c42SJ. Bruce Fields return 0; /* XXX: or SEQ_SKIP? */ 254678599c42SJ. Bruce Fields } 254716d36e09SJ. Bruce Fields /* XXX: copy stateids? */ 254878599c42SJ. Bruce Fields } 254978599c42SJ. Bruce Fields 255078599c42SJ. Bruce Fields static struct seq_operations states_seq_ops = { 255178599c42SJ. Bruce Fields .start = states_start, 255278599c42SJ. Bruce Fields .next = states_next, 255378599c42SJ. Bruce Fields .stop = states_stop, 255478599c42SJ. Bruce Fields .show = states_show 255578599c42SJ. Bruce Fields }; 255678599c42SJ. Bruce Fields 255778599c42SJ. Bruce Fields static int client_states_open(struct inode *inode, struct file *file) 255878599c42SJ. Bruce Fields { 255978599c42SJ. Bruce Fields struct seq_file *s; 256078599c42SJ. Bruce Fields struct nfs4_client *clp; 256178599c42SJ. Bruce Fields int ret; 256278599c42SJ. Bruce Fields 2563a204f25eSJ. Bruce Fields clp = get_nfsdfs_clp(inode); 2564a204f25eSJ. Bruce Fields if (!clp) 256578599c42SJ. Bruce Fields return -ENXIO; 256678599c42SJ. Bruce Fields 256778599c42SJ. Bruce Fields ret = seq_open(file, &states_seq_ops); 256878599c42SJ. Bruce Fields if (ret) 256978599c42SJ. Bruce Fields return ret; 257078599c42SJ. Bruce Fields s = file->private_data; 257178599c42SJ. Bruce Fields s->private = clp; 257278599c42SJ. Bruce Fields return 0; 257378599c42SJ. Bruce Fields } 257478599c42SJ. Bruce Fields 257578599c42SJ. Bruce Fields static int client_opens_release(struct inode *inode, struct file *file) 257678599c42SJ. Bruce Fields { 257778599c42SJ. Bruce Fields struct seq_file *m = file->private_data; 257878599c42SJ. Bruce Fields struct nfs4_client *clp = m->private; 257978599c42SJ. Bruce Fields 258078599c42SJ. Bruce Fields /* XXX: alternatively, we could get/drop in seq start/stop */ 258178599c42SJ. Bruce Fields drop_client(clp); 258278599c42SJ. Bruce Fields return 0; 258378599c42SJ. Bruce Fields } 258478599c42SJ. Bruce Fields 258578599c42SJ. Bruce Fields static const struct file_operations client_states_fops = { 258678599c42SJ. Bruce Fields .open = client_states_open, 258778599c42SJ. Bruce Fields .read = seq_read, 258878599c42SJ. Bruce Fields .llseek = seq_lseek, 258978599c42SJ. Bruce Fields .release = client_opens_release, 259078599c42SJ. Bruce Fields }; 259178599c42SJ. Bruce Fields 259289c905beSJ. Bruce Fields /* 259389c905beSJ. Bruce Fields * Normally we refuse to destroy clients that are in use, but here the 259489c905beSJ. Bruce Fields * administrator is telling us to just do it. We also want to wait 259589c905beSJ. Bruce Fields * so the caller has a guarantee that the client's locks are gone by 259689c905beSJ. Bruce Fields * the time the write returns: 259789c905beSJ. Bruce Fields */ 2598297e57a2SYueHaibing static void force_expire_client(struct nfs4_client *clp) 259989c905beSJ. Bruce Fields { 260089c905beSJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 260189c905beSJ. Bruce Fields bool already_expired; 260289c905beSJ. Bruce Fields 260389c905beSJ. Bruce Fields spin_lock(&clp->cl_lock); 260489c905beSJ. Bruce Fields clp->cl_time = 0; 260589c905beSJ. Bruce Fields spin_unlock(&clp->cl_lock); 260689c905beSJ. Bruce Fields 260789c905beSJ. Bruce Fields wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0); 260889c905beSJ. Bruce Fields spin_lock(&nn->client_lock); 260989c905beSJ. Bruce Fields already_expired = list_empty(&clp->cl_lru); 261089c905beSJ. Bruce Fields if (!already_expired) 261189c905beSJ. Bruce Fields unhash_client_locked(clp); 261289c905beSJ. Bruce Fields spin_unlock(&nn->client_lock); 261389c905beSJ. Bruce Fields 261489c905beSJ. Bruce Fields if (!already_expired) 261589c905beSJ. Bruce Fields expire_client(clp); 261689c905beSJ. Bruce Fields else 261789c905beSJ. Bruce Fields wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL); 261889c905beSJ. Bruce Fields } 261989c905beSJ. Bruce Fields 262089c905beSJ. Bruce Fields static ssize_t client_ctl_write(struct file *file, const char __user *buf, 262189c905beSJ. Bruce Fields size_t size, loff_t *pos) 262289c905beSJ. Bruce Fields { 262389c905beSJ. Bruce Fields char *data; 262489c905beSJ. Bruce Fields struct nfs4_client *clp; 262589c905beSJ. Bruce Fields 262689c905beSJ. Bruce Fields data = simple_transaction_get(file, buf, size); 262789c905beSJ. Bruce Fields if (IS_ERR(data)) 262889c905beSJ. Bruce Fields return PTR_ERR(data); 262989c905beSJ. Bruce Fields if (size != 7 || 0 != memcmp(data, "expire\n", 7)) 263089c905beSJ. Bruce Fields return -EINVAL; 263189c905beSJ. Bruce Fields clp = get_nfsdfs_clp(file_inode(file)); 263289c905beSJ. Bruce Fields if (!clp) 263389c905beSJ. Bruce Fields return -ENXIO; 263489c905beSJ. Bruce Fields force_expire_client(clp); 263589c905beSJ. Bruce Fields drop_client(clp); 263689c905beSJ. Bruce Fields return 7; 263789c905beSJ. Bruce Fields } 263889c905beSJ. Bruce Fields 263989c905beSJ. Bruce Fields static const struct file_operations client_ctl_fops = { 264089c905beSJ. Bruce Fields .write = client_ctl_write, 264189c905beSJ. Bruce Fields .release = simple_transaction_release, 264289c905beSJ. Bruce Fields }; 264389c905beSJ. Bruce Fields 264497ad4031SJ. Bruce Fields static const struct tree_descr client_files[] = { 264597ad4031SJ. Bruce Fields [0] = {"info", &client_info_fops, S_IRUSR}, 264678599c42SJ. Bruce Fields [1] = {"states", &client_states_fops, S_IRUSR}, 26476cbfad5fSPetr Vorel [2] = {"ctl", &client_ctl_fops, S_IWUSR}, 264878599c42SJ. Bruce Fields [3] = {""}, 264997ad4031SJ. Bruce Fields }; 265097ad4031SJ. Bruce Fields 26512216d449SJeff Layton static struct nfs4_client *create_client(struct xdr_netobj name, 2652b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 2653b09333c4SRicardo Labiaga { 2654b09333c4SRicardo Labiaga struct nfs4_client *clp; 2655b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 265603a4e1f6SJ. Bruce Fields int ret; 2657c212cecfSStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 2658e8a79fb1SJ. Bruce Fields struct nfsd_net *nn = net_generic(net, nfsd_net_id); 2659b09333c4SRicardo Labiaga 2660b09333c4SRicardo Labiaga clp = alloc_client(name); 2661b09333c4SRicardo Labiaga if (clp == NULL) 2662b09333c4SRicardo Labiaga return NULL; 2663b09333c4SRicardo Labiaga 266403a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 266503a4e1f6SJ. Bruce Fields if (ret) { 2666b09333c4SRicardo Labiaga free_client(clp); 2667b09333c4SRicardo Labiaga return NULL; 2668b09333c4SRicardo Labiaga } 2669e8a79fb1SJ. Bruce Fields gen_clid(clp, nn); 2670e8a79fb1SJ. Bruce Fields kref_init(&clp->cl_nfsdfs.cl_ref); 26710162ac2bSChristoph Hellwig nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL); 267220b7d86fSArnd Bergmann clp->cl_time = ktime_get_boottime_seconds(); 2673b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 2674b09333c4SRicardo Labiaga copy_verf(clp, verf); 26753bade247SJ. Bruce Fields memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage)); 2676edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 2677c212cecfSStanislav Kinsbursky clp->net = net; 2678e8a79fb1SJ. Bruce Fields clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs, 267997ad4031SJ. Bruce Fields clp->cl_clientid.cl_id - nn->clientid_base, 268097ad4031SJ. Bruce Fields client_files); 2681e8a79fb1SJ. Bruce Fields if (!clp->cl_nfsd_dentry) { 2682e8a79fb1SJ. Bruce Fields free_client(clp); 2683e8a79fb1SJ. Bruce Fields return NULL; 2684e8a79fb1SJ. Bruce Fields } 2685b09333c4SRicardo Labiaga return clp; 2686b09333c4SRicardo Labiaga } 2687b09333c4SRicardo Labiaga 2688fd39ca9aSNeilBrown static void 2689ac55fdc4SJeff Layton add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) 2690ac55fdc4SJeff Layton { 2691ac55fdc4SJeff Layton struct rb_node **new = &(root->rb_node), *parent = NULL; 2692ac55fdc4SJeff Layton struct nfs4_client *clp; 2693ac55fdc4SJeff Layton 2694ac55fdc4SJeff Layton while (*new) { 2695ac55fdc4SJeff Layton clp = rb_entry(*new, struct nfs4_client, cl_namenode); 2696ac55fdc4SJeff Layton parent = *new; 2697ac55fdc4SJeff Layton 2698ac55fdc4SJeff Layton if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) 2699ac55fdc4SJeff Layton new = &((*new)->rb_left); 2700ac55fdc4SJeff Layton else 2701ac55fdc4SJeff Layton new = &((*new)->rb_right); 2702ac55fdc4SJeff Layton } 2703ac55fdc4SJeff Layton 2704ac55fdc4SJeff Layton rb_link_node(&new_clp->cl_namenode, parent, new); 2705ac55fdc4SJeff Layton rb_insert_color(&new_clp->cl_namenode, root); 2706ac55fdc4SJeff Layton } 2707ac55fdc4SJeff Layton 2708ac55fdc4SJeff Layton static struct nfs4_client * 2709ac55fdc4SJeff Layton find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) 2710ac55fdc4SJeff Layton { 2711ef17af2aSRasmus Villemoes int cmp; 2712ac55fdc4SJeff Layton struct rb_node *node = root->rb_node; 2713ac55fdc4SJeff Layton struct nfs4_client *clp; 2714ac55fdc4SJeff Layton 2715ac55fdc4SJeff Layton while (node) { 2716ac55fdc4SJeff Layton clp = rb_entry(node, struct nfs4_client, cl_namenode); 2717ac55fdc4SJeff Layton cmp = compare_blob(&clp->cl_name, name); 2718ac55fdc4SJeff Layton if (cmp > 0) 2719ac55fdc4SJeff Layton node = node->rb_left; 2720ac55fdc4SJeff Layton else if (cmp < 0) 2721ac55fdc4SJeff Layton node = node->rb_right; 2722ac55fdc4SJeff Layton else 2723ac55fdc4SJeff Layton return clp; 2724ac55fdc4SJeff Layton } 2725ac55fdc4SJeff Layton return NULL; 2726ac55fdc4SJeff Layton } 2727ac55fdc4SJeff Layton 2728ac55fdc4SJeff Layton static void 2729ac55fdc4SJeff Layton add_to_unconfirmed(struct nfs4_client *clp) 27301da177e4SLinus Torvalds { 27311da177e4SLinus Torvalds unsigned int idhashval; 27320a7ec377SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 27331da177e4SLinus Torvalds 27340a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 27350a880a28STrond Myklebust 2736ac55fdc4SJeff Layton clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 2737a99454aaSStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->unconf_name_tree); 27381da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 27390a7ec377SStanislav Kinsbursky list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); 27403dbacee6STrond Myklebust renew_client_locked(clp); 27411da177e4SLinus Torvalds } 27421da177e4SLinus Torvalds 2743fd39ca9aSNeilBrown static void 27441da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 27451da177e4SLinus Torvalds { 27461da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 27478daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 27481da177e4SLinus Torvalds 27490a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 27500a880a28STrond Myklebust 27511da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 27528daae4dcSStanislav Kinsbursky list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); 2753a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 2754382a62e7SStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->conf_name_tree); 2755ac55fdc4SJeff Layton set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 27563dbacee6STrond Myklebust renew_client_locked(clp); 27571da177e4SLinus Torvalds } 27581da177e4SLinus Torvalds 27591da177e4SLinus Torvalds static struct nfs4_client * 2760bfa85e83SJ. Bruce Fields find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) 27611da177e4SLinus Torvalds { 27621da177e4SLinus Torvalds struct nfs4_client *clp; 27631da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 27641da177e4SLinus Torvalds 2765bfa85e83SJ. Bruce Fields list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { 2766a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 2767d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2768d15c077eSJ. Bruce Fields return NULL; 27693dbacee6STrond Myklebust renew_client_locked(clp); 27701da177e4SLinus Torvalds return clp; 27711da177e4SLinus Torvalds } 2772a50d2ad1SJ. Bruce Fields } 27731da177e4SLinus Torvalds return NULL; 27741da177e4SLinus Torvalds } 27751da177e4SLinus Torvalds 27761da177e4SLinus Torvalds static struct nfs4_client * 2777bfa85e83SJ. Bruce Fields find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 2778bfa85e83SJ. Bruce Fields { 2779bfa85e83SJ. Bruce Fields struct list_head *tbl = nn->conf_id_hashtbl; 2780bfa85e83SJ. Bruce Fields 27810a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 2782bfa85e83SJ. Bruce Fields return find_client_in_id_table(tbl, clid, sessions); 2783bfa85e83SJ. Bruce Fields } 2784bfa85e83SJ. Bruce Fields 2785bfa85e83SJ. Bruce Fields static struct nfs4_client * 27860a7ec377SStanislav Kinsbursky find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 27871da177e4SLinus Torvalds { 2788bfa85e83SJ. Bruce Fields struct list_head *tbl = nn->unconf_id_hashtbl; 27891da177e4SLinus Torvalds 27900a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 2791bfa85e83SJ. Bruce Fields return find_client_in_id_table(tbl, clid, sessions); 27921da177e4SLinus Torvalds } 27931da177e4SLinus Torvalds 27946e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 2795a1bcecd2SAndy Adamson { 27966e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 2797a1bcecd2SAndy Adamson } 2798a1bcecd2SAndy Adamson 279928ce6054SNeilBrown static struct nfs4_client * 2800382a62e7SStanislav Kinsbursky find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 280128ce6054SNeilBrown { 28020a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 2803382a62e7SStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->conf_name_tree); 280428ce6054SNeilBrown } 280528ce6054SNeilBrown 280628ce6054SNeilBrown static struct nfs4_client * 2807a99454aaSStanislav Kinsbursky find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 280828ce6054SNeilBrown { 28090a880a28STrond Myklebust lockdep_assert_held(&nn->client_lock); 2810a99454aaSStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->unconf_name_tree); 281128ce6054SNeilBrown } 281228ce6054SNeilBrown 2813fd39ca9aSNeilBrown static void 28146f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 28151da177e4SLinus Torvalds { 281607263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 28176f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 28186f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 28197077ecbaSJeff Layton unsigned short expected_family; 28201da177e4SLinus Torvalds 28217077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 28227077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 28237077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 28247077ecbaSJeff Layton expected_family = AF_INET; 28257077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 28267077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 28277077ecbaSJeff Layton expected_family = AF_INET6; 28287077ecbaSJeff Layton else 28291da177e4SLinus Torvalds goto out_err; 28301da177e4SLinus Torvalds 2831c212cecfSStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, 2832aa9a4ec7SJeff Layton se->se_callback_addr_len, 283307263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 283407263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 2835aa9a4ec7SJeff Layton 283607263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 28371da177e4SLinus Torvalds goto out_err; 2838aa9a4ec7SJeff Layton 283907263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 284007263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 2841fbf4665fSJeff Layton 284207263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 284307263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 2844849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 28451eace0d1SChuck Lever trace_nfsd_cb_args(clp, conn); 28461da177e4SLinus Torvalds return; 28471da177e4SLinus Torvalds out_err: 284807263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 284907263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 28501eace0d1SChuck Lever trace_nfsd_cb_nodelegs(clp); 28511da177e4SLinus Torvalds return; 28521da177e4SLinus Torvalds } 28531da177e4SLinus Torvalds 2854074fe897SAndy Adamson /* 2855067e1aceSJ. Bruce Fields * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. 2856074fe897SAndy Adamson */ 2857b607664eSTrond Myklebust static void 2858074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 2859074fe897SAndy Adamson { 2860f5236013SJ. Bruce Fields struct xdr_buf *buf = resp->xdr.buf; 2861557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 2862557ce264SAndy Adamson unsigned int base; 2863074fe897SAndy Adamson 2864557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 2865074fe897SAndy Adamson 2866085def3aSJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 2867557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 2868557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 286953da6a53SJ. Bruce Fields free_svc_cred(&slot->sl_cred); 287053da6a53SJ. Bruce Fields copy_cred(&slot->sl_cred, &resp->rqstp->rq_cred); 2871bf864a31SAndy Adamson 2872085def3aSJ. Bruce Fields if (!nfsd4_cache_this(resp)) { 2873085def3aSJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHED; 2874bf864a31SAndy Adamson return; 2875bf864a31SAndy Adamson } 2876085def3aSJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHED; 2877085def3aSJ. Bruce Fields 2878f5236013SJ. Bruce Fields base = resp->cstate.data_offset; 2879f5236013SJ. Bruce Fields slot->sl_datalen = buf->len - base; 2880f5236013SJ. Bruce Fields if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) 2881d3f03403SDan Carpenter WARN(1, "%s: sessions DRC could not cache compound\n", 2882d3f03403SDan Carpenter __func__); 2883557ce264SAndy Adamson return; 2884074fe897SAndy Adamson } 2885074fe897SAndy Adamson 2886074fe897SAndy Adamson /* 2887abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 2888abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 2889abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 2890abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 2891abfabf8cSAndy Adamson * 2892074fe897SAndy Adamson */ 2893abfabf8cSAndy Adamson static __be32 2894abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 2895abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 2896074fe897SAndy Adamson { 2897abfabf8cSAndy Adamson struct nfsd4_op *op; 2898abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 2899074fe897SAndy Adamson 2900abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 2901abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 2902abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 2903abfabf8cSAndy Adamson 2904085def3aSJ. Bruce Fields if (slot->sl_flags & NFSD4_SLOT_CACHED) 2905085def3aSJ. Bruce Fields return op->status; 2906085def3aSJ. Bruce Fields if (args->opcnt == 1) { 2907085def3aSJ. Bruce Fields /* 2908085def3aSJ. Bruce Fields * The original operation wasn't a solo sequence--we 2909085def3aSJ. Bruce Fields * always cache those--so this retry must not match the 2910085def3aSJ. Bruce Fields * original: 2911085def3aSJ. Bruce Fields */ 2912085def3aSJ. Bruce Fields op->status = nfserr_seq_false_retry; 2913085def3aSJ. Bruce Fields } else { 2914abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 2915abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 2916abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 2917074fe897SAndy Adamson } 2918abfabf8cSAndy Adamson return op->status; 2919074fe897SAndy Adamson } 2920074fe897SAndy Adamson 2921074fe897SAndy Adamson /* 2922557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 2923557ce264SAndy Adamson * session values. 2924074fe897SAndy Adamson */ 29253ca2eb98SJ. Bruce Fields static __be32 2926bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 2927bf864a31SAndy Adamson struct nfsd4_sequence *seq) 2928074fe897SAndy Adamson { 2929557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 2930f5236013SJ. Bruce Fields struct xdr_stream *xdr = &resp->xdr; 2931f5236013SJ. Bruce Fields __be32 *p; 2932074fe897SAndy Adamson __be32 status; 2933074fe897SAndy Adamson 2934557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 2935074fe897SAndy Adamson 2936abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 29370da7b19cSJ. Bruce Fields if (status) 2938abfabf8cSAndy Adamson return status; 2939074fe897SAndy Adamson 2940f5236013SJ. Bruce Fields p = xdr_reserve_space(xdr, slot->sl_datalen); 2941f5236013SJ. Bruce Fields if (!p) { 2942f5236013SJ. Bruce Fields WARN_ON_ONCE(1); 2943f5236013SJ. Bruce Fields return nfserr_serverfault; 2944f5236013SJ. Bruce Fields } 2945f5236013SJ. Bruce Fields xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); 2946f5236013SJ. Bruce Fields xdr_commit_encode(xdr); 2947074fe897SAndy Adamson 2948557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 2949f5236013SJ. Bruce Fields return slot->sl_status; 2950074fe897SAndy Adamson } 2951074fe897SAndy Adamson 29520733d213SAndy Adamson /* 29530733d213SAndy Adamson * Set the exchange_id flags returned by the server. 29540733d213SAndy Adamson */ 29550733d213SAndy Adamson static void 29560733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 29570733d213SAndy Adamson { 29589cf514ccSChristoph Hellwig #ifdef CONFIG_NFSD_PNFS 29599cf514ccSChristoph Hellwig new->cl_exchange_flags |= EXCHGID4_FLAG_USE_PNFS_MDS; 29609cf514ccSChristoph Hellwig #else 29610733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 29629cf514ccSChristoph Hellwig #endif 29630733d213SAndy Adamson 29640733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 29650733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 29660733d213SAndy Adamson 29670733d213SAndy Adamson /* set the wire flags to return to client. */ 29680733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 29690733d213SAndy Adamson } 29700733d213SAndy Adamson 29714eaea134SJ. Bruce Fields static bool client_has_openowners(struct nfs4_client *clp) 29724eaea134SJ. Bruce Fields { 29734eaea134SJ. Bruce Fields struct nfs4_openowner *oo; 29744eaea134SJ. Bruce Fields 29754eaea134SJ. Bruce Fields list_for_each_entry(oo, &clp->cl_openowners, oo_perclient) { 29764eaea134SJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 29774eaea134SJ. Bruce Fields return true; 29784eaea134SJ. Bruce Fields } 29794eaea134SJ. Bruce Fields return false; 29804eaea134SJ. Bruce Fields } 29814eaea134SJ. Bruce Fields 2982631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 2983631fc9eaSJ. Bruce Fields { 29844eaea134SJ. Bruce Fields return client_has_openowners(clp) 298547e970beSKinglong Mee #ifdef CONFIG_NFSD_PNFS 298647e970beSKinglong Mee || !list_empty(&clp->cl_lo_states) 298747e970beSKinglong Mee #endif 29886eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 2989e0639dc5SOlga Kornievskaia || !list_empty(&clp->cl_sessions) 2990e0639dc5SOlga Kornievskaia || !list_empty(&clp->async_copies); 2991631fc9eaSJ. Bruce Fields } 2992631fc9eaSJ. Bruce Fields 299379123444SJ. Bruce Fields static __be32 copy_impl_id(struct nfs4_client *clp, 299479123444SJ. Bruce Fields struct nfsd4_exchange_id *exid) 299579123444SJ. Bruce Fields { 299679123444SJ. Bruce Fields if (!exid->nii_domain.data) 299779123444SJ. Bruce Fields return 0; 299879123444SJ. Bruce Fields xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL); 299979123444SJ. Bruce Fields if (!clp->cl_nii_domain.data) 300079123444SJ. Bruce Fields return nfserr_jukebox; 300179123444SJ. Bruce Fields xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL); 300279123444SJ. Bruce Fields if (!clp->cl_nii_name.data) 300379123444SJ. Bruce Fields return nfserr_jukebox; 3004e29f4703SArnd Bergmann clp->cl_nii_time = exid->nii_time; 300579123444SJ. Bruce Fields return 0; 300679123444SJ. Bruce Fields } 300779123444SJ. Bruce Fields 3008b37ad28bSAl Viro __be32 3009eb69853dSChristoph Hellwig nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3010eb69853dSChristoph Hellwig union nfsd4_op_u *u) 3011069b6ad4SAndy Adamson { 3012eb69853dSChristoph Hellwig struct nfsd4_exchange_id *exid = &u->exchange_id; 30133dbacee6STrond Myklebust struct nfs4_client *conf, *new; 30143dbacee6STrond Myklebust struct nfs4_client *unconf = NULL; 301557b7b43bSJ. Bruce Fields __be32 status; 3016363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 30170733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 3018363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 301983e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 3020c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 30210733d213SAndy Adamson 3022363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 30230733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 3024363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 30250733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 3026363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 30270733d213SAndy Adamson 3028a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 30290733d213SAndy Adamson return nfserr_inval; 30300733d213SAndy Adamson 303150c7b948SJ. Bruce Fields new = create_client(exid->clname, rqstp, &verf); 303250c7b948SJ. Bruce Fields if (new == NULL) 303350c7b948SJ. Bruce Fields return nfserr_jukebox; 303479123444SJ. Bruce Fields status = copy_impl_id(new, exid); 303579123444SJ. Bruce Fields if (status) 303679123444SJ. Bruce Fields goto out_nolock; 303750c7b948SJ. Bruce Fields 30380733d213SAndy Adamson switch (exid->spa_how) { 303957266a6eSJ. Bruce Fields case SP4_MACH_CRED: 3040ed941643SAndrew Elble exid->spo_must_enforce[0] = 0; 3041ed941643SAndrew Elble exid->spo_must_enforce[1] = ( 3042ed941643SAndrew Elble 1 << (OP_BIND_CONN_TO_SESSION - 32) | 3043ed941643SAndrew Elble 1 << (OP_EXCHANGE_ID - 32) | 3044ed941643SAndrew Elble 1 << (OP_CREATE_SESSION - 32) | 3045ed941643SAndrew Elble 1 << (OP_DESTROY_SESSION - 32) | 3046ed941643SAndrew Elble 1 << (OP_DESTROY_CLIENTID - 32)); 3047ed941643SAndrew Elble 3048ed941643SAndrew Elble exid->spo_must_allow[0] &= (1 << (OP_CLOSE) | 3049ed941643SAndrew Elble 1 << (OP_OPEN_DOWNGRADE) | 3050ed941643SAndrew Elble 1 << (OP_LOCKU) | 3051ed941643SAndrew Elble 1 << (OP_DELEGRETURN)); 3052ed941643SAndrew Elble 3053ed941643SAndrew Elble exid->spo_must_allow[1] &= ( 3054ed941643SAndrew Elble 1 << (OP_TEST_STATEID - 32) | 3055ed941643SAndrew Elble 1 << (OP_FREE_STATEID - 32)); 305650c7b948SJ. Bruce Fields if (!svc_rqst_integrity_protected(rqstp)) { 305750c7b948SJ. Bruce Fields status = nfserr_inval; 305850c7b948SJ. Bruce Fields goto out_nolock; 305950c7b948SJ. Bruce Fields } 3060920dd9bbSJ. Bruce Fields /* 3061920dd9bbSJ. Bruce Fields * Sometimes userspace doesn't give us a principal. 3062920dd9bbSJ. Bruce Fields * Which is a bug, really. Anyway, we can't enforce 3063920dd9bbSJ. Bruce Fields * MACH_CRED in that case, better to give up now: 3064920dd9bbSJ. Bruce Fields */ 3065414ca017SJ. Bruce Fields if (!new->cl_cred.cr_principal && 3066414ca017SJ. Bruce Fields !new->cl_cred.cr_raw_principal) { 3067920dd9bbSJ. Bruce Fields status = nfserr_serverfault; 3068920dd9bbSJ. Bruce Fields goto out_nolock; 3069920dd9bbSJ. Bruce Fields } 307050c7b948SJ. Bruce Fields new->cl_mach_cred = true; 30710733d213SAndy Adamson case SP4_NONE: 30720733d213SAndy Adamson break; 3073063b0fb9SJ. Bruce Fields default: /* checked by xdr code */ 3074063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 30750a4c9265SGustavo A. R. Silva /* fall through */ 30760733d213SAndy Adamson case SP4_SSV: 30778edf4b02SKinglong Mee status = nfserr_encr_alg_unsupp; 30788edf4b02SKinglong Mee goto out_nolock; 30790733d213SAndy Adamson } 30800733d213SAndy Adamson 30812dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 30823dbacee6STrond Myklebust spin_lock(&nn->client_lock); 3083382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&exid->clname, nn); 30840733d213SAndy Adamson if (conf) { 308583e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 308683e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 308783e08fd4SJ. Bruce Fields 3088136e658dSJ. Bruce Fields if (update) { 3089136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 30902dbb269dSJ. Bruce Fields status = nfserr_inval; 3091e203d506SJ. Bruce Fields goto out; 3092e203d506SJ. Bruce Fields } 3093dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(conf, rqstp)) { 309457266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 309557266a6eSJ. Bruce Fields goto out; 309657266a6eSJ. Bruce Fields } 30972dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 30980733d213SAndy Adamson status = nfserr_perm; 30990733d213SAndy Adamson goto out; 31000733d213SAndy Adamson } 31012dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 31020733d213SAndy Adamson status = nfserr_not_same; 31030733d213SAndy Adamson goto out; 31040733d213SAndy Adamson } 3105136e658dSJ. Bruce Fields /* case 6 */ 31060733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 31070733d213SAndy Adamson goto out_copy; 31086ddbbbfeSMike Sager } 3109136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 3110631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 3111136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 3112136e658dSJ. Bruce Fields goto out; 3113136e658dSJ. Bruce Fields } 3114b9831b59SJ. Bruce Fields goto out_new; 3115631fc9eaSJ. Bruce Fields } 3116136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 31170f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 3118136e658dSJ. Bruce Fields goto out_copy; 3119136e658dSJ. Bruce Fields } 31202dbb269dSJ. Bruce Fields /* case 5, client reboot */ 31213dbacee6STrond Myklebust conf = NULL; 31220733d213SAndy Adamson goto out_new; 31230733d213SAndy Adamson } 31246ddbbbfeSMike Sager 31252dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 31260733d213SAndy Adamson status = nfserr_noent; 31270733d213SAndy Adamson goto out; 31280733d213SAndy Adamson } 31290733d213SAndy Adamson 3130a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&exid->clname, nn); 31312dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 31323dbacee6STrond Myklebust unhash_client_locked(unconf); 31330733d213SAndy Adamson 31342dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 31350733d213SAndy Adamson out_new: 3136fd699b8aSJeff Layton if (conf) { 3137fd699b8aSJeff Layton status = mark_client_expired_locked(conf); 3138fd699b8aSJeff Layton if (status) 3139fd699b8aSJeff Layton goto out; 3140fd699b8aSJeff Layton } 31414f540e29SJ. Bruce Fields new->cl_minorversion = cstate->minorversion; 3142ed941643SAndrew Elble new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0]; 3143ed941643SAndrew Elble new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1]; 31440733d213SAndy Adamson 3145ac55fdc4SJeff Layton add_to_unconfirmed(new); 31463dbacee6STrond Myklebust swap(new, conf); 31470733d213SAndy Adamson out_copy: 31485cc40fd7STrond Myklebust exid->clientid.cl_boot = conf->cl_clientid.cl_boot; 31495cc40fd7STrond Myklebust exid->clientid.cl_id = conf->cl_clientid.cl_id; 31500733d213SAndy Adamson 31515cc40fd7STrond Myklebust exid->seqid = conf->cl_cs_slot.sl_seqid + 1; 31525cc40fd7STrond Myklebust nfsd4_set_ex_flags(conf, exid); 31530733d213SAndy Adamson 31540733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 31555cc40fd7STrond Myklebust conf->cl_cs_slot.sl_seqid, conf->cl_exchange_flags); 31560733d213SAndy Adamson status = nfs_ok; 31570733d213SAndy Adamson 31580733d213SAndy Adamson out: 31593dbacee6STrond Myklebust spin_unlock(&nn->client_lock); 316050c7b948SJ. Bruce Fields out_nolock: 31615cc40fd7STrond Myklebust if (new) 31623dbacee6STrond Myklebust expire_client(new); 31633dbacee6STrond Myklebust if (unconf) 31643dbacee6STrond Myklebust expire_client(unconf); 31650733d213SAndy Adamson return status; 3166069b6ad4SAndy Adamson } 3167069b6ad4SAndy Adamson 316857b7b43bSJ. Bruce Fields static __be32 316988e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 3170b85d4c01SBenny Halevy { 317188e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 317288e588d5SAndy Adamson slot_seqid); 3173b85d4c01SBenny Halevy 3174b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 317588e588d5SAndy Adamson if (slot_inuse) { 317688e588d5SAndy Adamson if (seqid == slot_seqid) 3177b85d4c01SBenny Halevy return nfserr_jukebox; 3178b85d4c01SBenny Halevy else 3179b85d4c01SBenny Halevy return nfserr_seq_misordered; 3180b85d4c01SBenny Halevy } 3181f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 318288e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 3183b85d4c01SBenny Halevy return nfs_ok; 318488e588d5SAndy Adamson if (seqid == slot_seqid) 3185b85d4c01SBenny Halevy return nfserr_replay_cache; 3186b85d4c01SBenny Halevy return nfserr_seq_misordered; 3187b85d4c01SBenny Halevy } 3188b85d4c01SBenny Halevy 318949557cc7SAndy Adamson /* 319049557cc7SAndy Adamson * Cache the create session result into the create session single DRC 319149557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 319249557cc7SAndy Adamson * Do this for solo or embedded create session operations. 319349557cc7SAndy Adamson */ 319449557cc7SAndy Adamson static void 319549557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 319657b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 319749557cc7SAndy Adamson { 319849557cc7SAndy Adamson slot->sl_status = nfserr; 319949557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 320049557cc7SAndy Adamson } 320149557cc7SAndy Adamson 320249557cc7SAndy Adamson static __be32 320349557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 320449557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 320549557cc7SAndy Adamson { 320649557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 320749557cc7SAndy Adamson return slot->sl_status; 320849557cc7SAndy Adamson } 320949557cc7SAndy Adamson 32101b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 32111b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 32121b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 32131b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 32141b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 32151b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 32161b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 32171b74c25bSMi Jinlong 32181b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 32191b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 32201b74c25bSMi Jinlong 1 + /* status */ \ 32211b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 32221b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 32231b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 32241b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 32251b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 32261b74c25bSMi Jinlong 322755c760cfSJ. Bruce Fields static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) 32281b74c25bSMi Jinlong { 322955c760cfSJ. Bruce Fields u32 maxrpc = nn->nfsd_serv->sv_max_mesg; 323055c760cfSJ. Bruce Fields 3231373cd409SJ. Bruce Fields if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) 3232373cd409SJ. Bruce Fields return nfserr_toosmall; 3233373cd409SJ. Bruce Fields if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) 3234373cd409SJ. Bruce Fields return nfserr_toosmall; 323555c760cfSJ. Bruce Fields ca->headerpadsz = 0; 323655c760cfSJ. Bruce Fields ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); 323755c760cfSJ. Bruce Fields ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); 323855c760cfSJ. Bruce Fields ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); 323955c760cfSJ. Bruce Fields ca->maxresp_cached = min_t(u32, ca->maxresp_cached, 324055c760cfSJ. Bruce Fields NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); 324155c760cfSJ. Bruce Fields ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); 324255c760cfSJ. Bruce Fields /* 324355c760cfSJ. Bruce Fields * Note decreasing slot size below client's request may make it 324455c760cfSJ. Bruce Fields * difficult for client to function correctly, whereas 324555c760cfSJ. Bruce Fields * decreasing the number of slots will (just?) affect 324655c760cfSJ. Bruce Fields * performance. When short on memory we therefore prefer to 324755c760cfSJ. Bruce Fields * decrease number of slots instead of their size. Clients that 324855c760cfSJ. Bruce Fields * request larger slots than they need will get poor results: 32497f49fd5dSNeilBrown * Note that we always allow at least one slot, because our 32507f49fd5dSNeilBrown * accounting is soft and provides no guarantees either way. 325155c760cfSJ. Bruce Fields */ 32522030ca56SNeilBrown ca->maxreqs = nfsd4_get_drc_mem(ca, nn); 325355c760cfSJ. Bruce Fields 3254373cd409SJ. Bruce Fields return nfs_ok; 32551b74c25bSMi Jinlong } 32561b74c25bSMi Jinlong 32574500632fSChuck Lever /* 32584500632fSChuck Lever * Server's NFSv4.1 backchannel support is AUTH_SYS-only for now. 32594500632fSChuck Lever * These are based on similar macros in linux/sunrpc/msg_prot.h . 32604500632fSChuck Lever */ 32614500632fSChuck Lever #define RPC_MAX_HEADER_WITH_AUTH_SYS \ 32624500632fSChuck Lever (RPC_CALLHDRSIZE + 2 * (2 + UNX_CALLSLACK)) 32634500632fSChuck Lever 32644500632fSChuck Lever #define RPC_MAX_REPHEADER_WITH_AUTH_SYS \ 32654500632fSChuck Lever (RPC_REPHDRSIZE + (2 + NUL_REPLYSLACK)) 32664500632fSChuck Lever 32678a891633SKinglong Mee #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ 32684500632fSChuck Lever RPC_MAX_HEADER_WITH_AUTH_SYS) * sizeof(__be32)) 32698a891633SKinglong Mee #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ 32704500632fSChuck Lever RPC_MAX_REPHEADER_WITH_AUTH_SYS) * \ 32714500632fSChuck Lever sizeof(__be32)) 32728a891633SKinglong Mee 327306b332a5SJ. Bruce Fields static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) 327406b332a5SJ. Bruce Fields { 327506b332a5SJ. Bruce Fields ca->headerpadsz = 0; 327606b332a5SJ. Bruce Fields 32778a891633SKinglong Mee if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) 327806b332a5SJ. Bruce Fields return nfserr_toosmall; 32798a891633SKinglong Mee if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) 328006b332a5SJ. Bruce Fields return nfserr_toosmall; 328106b332a5SJ. Bruce Fields ca->maxresp_cached = 0; 328206b332a5SJ. Bruce Fields if (ca->maxops < 2) 328306b332a5SJ. Bruce Fields return nfserr_toosmall; 328406b332a5SJ. Bruce Fields 328506b332a5SJ. Bruce Fields return nfs_ok; 3286069b6ad4SAndy Adamson } 3287069b6ad4SAndy Adamson 3288b78724b7SJ. Bruce Fields static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) 3289b78724b7SJ. Bruce Fields { 3290b78724b7SJ. Bruce Fields switch (cbs->flavor) { 3291b78724b7SJ. Bruce Fields case RPC_AUTH_NULL: 3292b78724b7SJ. Bruce Fields case RPC_AUTH_UNIX: 3293b78724b7SJ. Bruce Fields return nfs_ok; 3294b78724b7SJ. Bruce Fields default: 3295b78724b7SJ. Bruce Fields /* 3296b78724b7SJ. Bruce Fields * GSS case: the spec doesn't allow us to return this 3297b78724b7SJ. Bruce Fields * error. But it also doesn't allow us not to support 3298b78724b7SJ. Bruce Fields * GSS. 3299b78724b7SJ. Bruce Fields * I'd rather this fail hard than return some error the 3300b78724b7SJ. Bruce Fields * client might think it can already handle: 3301b78724b7SJ. Bruce Fields */ 3302b78724b7SJ. Bruce Fields return nfserr_encr_alg_unsupp; 3303b78724b7SJ. Bruce Fields } 3304b78724b7SJ. Bruce Fields } 3305b78724b7SJ. Bruce Fields 3306069b6ad4SAndy Adamson __be32 3307069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 3308eb69853dSChristoph Hellwig struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 3309069b6ad4SAndy Adamson { 3310eb69853dSChristoph Hellwig struct nfsd4_create_session *cr_ses = &u->create_session; 3311363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 3312ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 3313d20c11d8SJeff Layton struct nfs4_client *old = NULL; 3314ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 331581f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 331649557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 331757b7b43bSJ. Bruce Fields __be32 status = 0; 33188daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 3319ec6b5d7bSAndy Adamson 3320a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 3321a62573dcSMi Jinlong return nfserr_inval; 3322b78724b7SJ. Bruce Fields status = nfsd4_check_cb_sec(&cr_ses->cb_sec); 3323b78724b7SJ. Bruce Fields if (status) 3324b78724b7SJ. Bruce Fields return status; 332555c760cfSJ. Bruce Fields status = check_forechannel_attrs(&cr_ses->fore_channel, nn); 3326373cd409SJ. Bruce Fields if (status) 3327373cd409SJ. Bruce Fields return status; 332806b332a5SJ. Bruce Fields status = check_backchannel_attrs(&cr_ses->back_channel); 332906b332a5SJ. Bruce Fields if (status) 3330f403e450SKinglong Mee goto out_release_drc_mem; 333181f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 333260810e54SKinglong Mee new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); 333355c760cfSJ. Bruce Fields if (!new) 333455c760cfSJ. Bruce Fields goto out_release_drc_mem; 333581f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 333681f0b2a4SJ. Bruce Fields if (!conn) 333781f0b2a4SJ. Bruce Fields goto out_free_session; 3338a62573dcSMi Jinlong 3339d20c11d8SJeff Layton spin_lock(&nn->client_lock); 33400a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); 33418daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&cr_ses->clientid, true, nn); 334278389046SJ. Bruce Fields WARN_ON_ONCE(conf && unconf); 3343ec6b5d7bSAndy Adamson 3344ec6b5d7bSAndy Adamson if (conf) { 334557266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 3346dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(conf, rqstp)) 334757266a6eSJ. Bruce Fields goto out_free_conn; 334849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 334949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 3350f5e22bb6SKinglong Mee if (status) { 3351f5e22bb6SKinglong Mee if (status == nfserr_replay_cache) 335249557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 335381f0b2a4SJ. Bruce Fields goto out_free_conn; 3354ec6b5d7bSAndy Adamson } 3355ec6b5d7bSAndy Adamson } else if (unconf) { 3356ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 3357363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 3358ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 335981f0b2a4SJ. Bruce Fields goto out_free_conn; 3360ec6b5d7bSAndy Adamson } 336157266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 3362dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(unconf, rqstp)) 336357266a6eSJ. Bruce Fields goto out_free_conn; 336449557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 336549557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 336638eb76a5SAndy Adamson if (status) { 336738eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 3368ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 336981f0b2a4SJ. Bruce Fields goto out_free_conn; 3370ec6b5d7bSAndy Adamson } 3371382a62e7SStanislav Kinsbursky old = find_confirmed_client_by_name(&unconf->cl_name, nn); 3372221a6876SJ. Bruce Fields if (old) { 3373d20c11d8SJeff Layton status = mark_client_expired_locked(old); 33747abea1e8SJeff Layton if (status) { 33757abea1e8SJeff Layton old = NULL; 3376221a6876SJ. Bruce Fields goto out_free_conn; 3377221a6876SJ. Bruce Fields } 33787abea1e8SJeff Layton } 33798f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 3380ec6b5d7bSAndy Adamson conf = unconf; 3381ec6b5d7bSAndy Adamson } else { 3382ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 338381f0b2a4SJ. Bruce Fields goto out_free_conn; 3384ec6b5d7bSAndy Adamson } 338581f0b2a4SJ. Bruce Fields status = nfs_ok; 33864ce85c8cSChuck Lever /* Persistent sessions are not supported */ 3387408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 33884ce85c8cSChuck Lever /* Upshifting from TCP to RDMA is not supported */ 3389408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 3390408b79bcSJ. Bruce Fields 339181f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 3392d20c11d8SJeff Layton nfsd4_get_session_locked(new); 339381f0b2a4SJ. Bruce Fields 3394ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 3395ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 339686c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 339749557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 3398ec6b5d7bSAndy Adamson 3399d20c11d8SJeff Layton /* cache solo and embedded create sessions under the client_lock */ 340049557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 3401d20c11d8SJeff Layton spin_unlock(&nn->client_lock); 3402d20c11d8SJeff Layton /* init connection and backchannel */ 3403d20c11d8SJeff Layton nfsd4_init_conn(rqstp, conn, new); 3404d20c11d8SJeff Layton nfsd4_put_session(new); 3405d20c11d8SJeff Layton if (old) 3406d20c11d8SJeff Layton expire_client(old); 3407ec6b5d7bSAndy Adamson return status; 340881f0b2a4SJ. Bruce Fields out_free_conn: 3409d20c11d8SJeff Layton spin_unlock(&nn->client_lock); 341081f0b2a4SJ. Bruce Fields free_conn(conn); 3411d20c11d8SJeff Layton if (old) 3412d20c11d8SJeff Layton expire_client(old); 341381f0b2a4SJ. Bruce Fields out_free_session: 341481f0b2a4SJ. Bruce Fields __free_session(new); 341555c760cfSJ. Bruce Fields out_release_drc_mem: 341655c760cfSJ. Bruce Fields nfsd4_put_drc_mem(&cr_ses->fore_channel); 34171ca50792SJ. Bruce Fields return status; 3418069b6ad4SAndy Adamson } 3419069b6ad4SAndy Adamson 34201d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 34211d1bc8f2SJ. Bruce Fields { 34221d1bc8f2SJ. Bruce Fields switch (*dir) { 34231d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 34241d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 34251d1bc8f2SJ. Bruce Fields return nfs_ok; 34261d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 34271d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 34281d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 34291d1bc8f2SJ. Bruce Fields return nfs_ok; 3430fc5fc5d7Szhengbin } 34311d1bc8f2SJ. Bruce Fields return nfserr_inval; 34321d1bc8f2SJ. Bruce Fields } 34331d1bc8f2SJ. Bruce Fields 3434eb69853dSChristoph Hellwig __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, 3435eb69853dSChristoph Hellwig struct nfsd4_compound_state *cstate, 3436eb69853dSChristoph Hellwig union nfsd4_op_u *u) 3437cb73a9f4SJ. Bruce Fields { 3438eb69853dSChristoph Hellwig struct nfsd4_backchannel_ctl *bc = &u->backchannel_ctl; 3439cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 3440c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 3441b78724b7SJ. Bruce Fields __be32 status; 3442cb73a9f4SJ. Bruce Fields 3443b78724b7SJ. Bruce Fields status = nfsd4_check_cb_sec(&bc->bc_cb_sec); 3444b78724b7SJ. Bruce Fields if (status) 3445b78724b7SJ. Bruce Fields return status; 3446c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 3447cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 3448cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 3449c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 3450cb73a9f4SJ. Bruce Fields 3451cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 3452cb73a9f4SJ. Bruce Fields 3453cb73a9f4SJ. Bruce Fields return nfs_ok; 3454cb73a9f4SJ. Bruce Fields } 3455cb73a9f4SJ. Bruce Fields 34561d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 34571d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 3458eb69853dSChristoph Hellwig union nfsd4_op_u *u) 34591d1bc8f2SJ. Bruce Fields { 3460eb69853dSChristoph Hellwig struct nfsd4_bind_conn_to_session *bcts = &u->bind_conn_to_session; 34611d1bc8f2SJ. Bruce Fields __be32 status; 34623ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 34634f6e6c17SJ. Bruce Fields struct nfsd4_session *session; 3464d4e19e70STrond Myklebust struct net *net = SVC_NET(rqstp); 3465d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 34661d1bc8f2SJ. Bruce Fields 34671d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 34681d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 3469c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 3470d4e19e70STrond Myklebust session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); 3471c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 34724f6e6c17SJ. Bruce Fields if (!session) 3473d4e19e70STrond Myklebust goto out_no_session; 347457266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 3475dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(session->se_client, rqstp)) 347657266a6eSJ. Bruce Fields goto out; 34771d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 34783ba63671SJ. Bruce Fields if (status) 34794f6e6c17SJ. Bruce Fields goto out; 34803ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 34814f6e6c17SJ. Bruce Fields status = nfserr_jukebox; 34823ba63671SJ. Bruce Fields if (!conn) 34834f6e6c17SJ. Bruce Fields goto out; 34844f6e6c17SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, session); 34854f6e6c17SJ. Bruce Fields status = nfs_ok; 34864f6e6c17SJ. Bruce Fields out: 3487d4e19e70STrond Myklebust nfsd4_put_session(session); 3488d4e19e70STrond Myklebust out_no_session: 34894f6e6c17SJ. Bruce Fields return status; 34901d1bc8f2SJ. Bruce Fields } 34911d1bc8f2SJ. Bruce Fields 3492665d5072SJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_compound_state *cstate, struct nfs4_sessionid *sid) 34935d4cec2fSJ. Bruce Fields { 3494665d5072SJ. Bruce Fields if (!cstate->session) 349551d87bc2SFengguang Wu return false; 3496665d5072SJ. Bruce Fields return !memcmp(sid, &cstate->session->se_sessionid, sizeof(*sid)); 34975d4cec2fSJ. Bruce Fields } 34985d4cec2fSJ. Bruce Fields 3499069b6ad4SAndy Adamson __be32 3500eb69853dSChristoph Hellwig nfsd4_destroy_session(struct svc_rqst *r, struct nfsd4_compound_state *cstate, 3501eb69853dSChristoph Hellwig union nfsd4_op_u *u) 3502069b6ad4SAndy Adamson { 3503ca0552f4SJ. Bruce Fields struct nfs4_sessionid *sessionid = &u->destroy_session.sessionid; 3504e10e0cfcSBenny Halevy struct nfsd4_session *ses; 3505abcdff09SJ. Bruce Fields __be32 status; 3506f0f51f5cSJ. Bruce Fields int ref_held_by_me = 0; 3507d4e19e70STrond Myklebust struct net *net = SVC_NET(r); 3508d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 3509e10e0cfcSBenny Halevy 3510abcdff09SJ. Bruce Fields status = nfserr_not_only_op; 3511ca0552f4SJ. Bruce Fields if (nfsd4_compound_in_session(cstate, sessionid)) { 351257716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 3513abcdff09SJ. Bruce Fields goto out; 3514f0f51f5cSJ. Bruce Fields ref_held_by_me++; 351557716355SJ. Bruce Fields } 3516ca0552f4SJ. Bruce Fields dump_sessionid(__func__, sessionid); 3517c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 3518ca0552f4SJ. Bruce Fields ses = find_in_sessionid_hashtbl(sessionid, net, &status); 3519abcdff09SJ. Bruce Fields if (!ses) 3520abcdff09SJ. Bruce Fields goto out_client_lock; 352157266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 3522dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(ses->se_client, r)) 3523d4e19e70STrond Myklebust goto out_put_session; 3524f0f51f5cSJ. Bruce Fields status = mark_session_dead_locked(ses, 1 + ref_held_by_me); 352566b2b9b2SJ. Bruce Fields if (status) 3526f0f51f5cSJ. Bruce Fields goto out_put_session; 3527e10e0cfcSBenny Halevy unhash_session(ses); 3528c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 3529e10e0cfcSBenny Halevy 353084f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 353119cf5c02SJ. Bruce Fields 3532c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 3533e10e0cfcSBenny Halevy status = nfs_ok; 3534f0f51f5cSJ. Bruce Fields out_put_session: 3535d4e19e70STrond Myklebust nfsd4_put_session_locked(ses); 3536abcdff09SJ. Bruce Fields out_client_lock: 3537abcdff09SJ. Bruce Fields spin_unlock(&nn->client_lock); 3538e10e0cfcSBenny Halevy out: 3539e10e0cfcSBenny Halevy return status; 3540069b6ad4SAndy Adamson } 3541069b6ad4SAndy Adamson 3542a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 3543328ead28SJ. Bruce Fields { 3544328ead28SJ. Bruce Fields struct nfsd4_conn *c; 3545328ead28SJ. Bruce Fields 3546328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 3547a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 3548328ead28SJ. Bruce Fields return c; 3549328ead28SJ. Bruce Fields } 3550328ead28SJ. Bruce Fields } 3551328ead28SJ. Bruce Fields return NULL; 3552328ead28SJ. Bruce Fields } 3553328ead28SJ. Bruce Fields 355457266a6eSJ. Bruce Fields static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 3555328ead28SJ. Bruce Fields { 3556328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 3557a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 355857266a6eSJ. Bruce Fields __be32 status = nfs_ok; 355921b75b01SJ. Bruce Fields int ret; 3560328ead28SJ. Bruce Fields 3561328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 3562a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 356357266a6eSJ. Bruce Fields if (c) 356457266a6eSJ. Bruce Fields goto out_free; 356557266a6eSJ. Bruce Fields status = nfserr_conn_not_bound_to_session; 356657266a6eSJ. Bruce Fields if (clp->cl_mach_cred) 356757266a6eSJ. Bruce Fields goto out_free; 3568328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 3569328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 357021b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 357121b75b01SJ. Bruce Fields if (ret) 357221b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 357321b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 357457266a6eSJ. Bruce Fields return nfs_ok; 357557266a6eSJ. Bruce Fields out_free: 357657266a6eSJ. Bruce Fields spin_unlock(&clp->cl_lock); 357757266a6eSJ. Bruce Fields free_conn(new); 357857266a6eSJ. Bruce Fields return status; 3579328ead28SJ. Bruce Fields } 3580328ead28SJ. Bruce Fields 3581868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 3582868b89c3SMi Jinlong { 3583868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 3584868b89c3SMi Jinlong 3585868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 3586868b89c3SMi Jinlong } 3587868b89c3SMi Jinlong 3588ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 3589ae82a8d0SMi Jinlong struct nfsd4_session *session) 3590ae82a8d0SMi Jinlong { 3591ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 3592ae82a8d0SMi Jinlong 3593ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 3594ae82a8d0SMi Jinlong } 3595ae82a8d0SMi Jinlong 359653da6a53SJ. Bruce Fields static bool replay_matches_cache(struct svc_rqst *rqstp, 359753da6a53SJ. Bruce Fields struct nfsd4_sequence *seq, struct nfsd4_slot *slot) 359853da6a53SJ. Bruce Fields { 359953da6a53SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 360053da6a53SJ. Bruce Fields 360153da6a53SJ. Bruce Fields if ((bool)(slot->sl_flags & NFSD4_SLOT_CACHETHIS) != 360253da6a53SJ. Bruce Fields (bool)seq->cachethis) 360353da6a53SJ. Bruce Fields return false; 360453da6a53SJ. Bruce Fields /* 36056e73e92bSScott Mayhew * If there's an error then the reply can have fewer ops than 36066e73e92bSScott Mayhew * the call. 360753da6a53SJ. Bruce Fields */ 36086e73e92bSScott Mayhew if (slot->sl_opcnt < argp->opcnt && !slot->sl_status) 36096e73e92bSScott Mayhew return false; 36106e73e92bSScott Mayhew /* 36116e73e92bSScott Mayhew * But if we cached a reply with *more* ops than the call you're 36126e73e92bSScott Mayhew * sending us now, then this new call is clearly not really a 36136e73e92bSScott Mayhew * replay of the old one: 36146e73e92bSScott Mayhew */ 36156e73e92bSScott Mayhew if (slot->sl_opcnt > argp->opcnt) 361653da6a53SJ. Bruce Fields return false; 361753da6a53SJ. Bruce Fields /* This is the only check explicitly called by spec: */ 361853da6a53SJ. Bruce Fields if (!same_creds(&rqstp->rq_cred, &slot->sl_cred)) 361953da6a53SJ. Bruce Fields return false; 362053da6a53SJ. Bruce Fields /* 362153da6a53SJ. Bruce Fields * There may be more comparisons we could actually do, but the 362253da6a53SJ. Bruce Fields * spec doesn't require us to catch every case where the calls 362353da6a53SJ. Bruce Fields * don't match (that would require caching the call as well as 362453da6a53SJ. Bruce Fields * the reply), so we don't bother. 362553da6a53SJ. Bruce Fields */ 362653da6a53SJ. Bruce Fields return true; 362753da6a53SJ. Bruce Fields } 362853da6a53SJ. Bruce Fields 3629069b6ad4SAndy Adamson __be32 3630eb69853dSChristoph Hellwig nfsd4_sequence(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3631eb69853dSChristoph Hellwig union nfsd4_op_u *u) 3632069b6ad4SAndy Adamson { 3633eb69853dSChristoph Hellwig struct nfsd4_sequence *seq = &u->sequence; 3634f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 363547ee5298SJ. Bruce Fields struct xdr_stream *xdr = &resp->xdr; 3636b85d4c01SBenny Halevy struct nfsd4_session *session; 3637221a6876SJ. Bruce Fields struct nfs4_client *clp; 3638b85d4c01SBenny Halevy struct nfsd4_slot *slot; 3639a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 364057b7b43bSJ. Bruce Fields __be32 status; 364147ee5298SJ. Bruce Fields int buflen; 3642d4e19e70STrond Myklebust struct net *net = SVC_NET(rqstp); 3643d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 3644b85d4c01SBenny Halevy 3645f9bb94c4SAndy Adamson if (resp->opcnt != 1) 3646f9bb94c4SAndy Adamson return nfserr_sequence_pos; 3647f9bb94c4SAndy Adamson 3648a663bdd8SJ. Bruce Fields /* 3649a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 3650a663bdd8SJ. Bruce Fields * below. 3651a663bdd8SJ. Bruce Fields */ 3652a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 3653a663bdd8SJ. Bruce Fields if (!conn) 3654a663bdd8SJ. Bruce Fields return nfserr_jukebox; 3655a663bdd8SJ. Bruce Fields 3656c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 3657d4e19e70STrond Myklebust session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); 3658b85d4c01SBenny Halevy if (!session) 3659221a6876SJ. Bruce Fields goto out_no_session; 3660221a6876SJ. Bruce Fields clp = session->se_client; 3661b85d4c01SBenny Halevy 3662868b89c3SMi Jinlong status = nfserr_too_many_ops; 3663868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 366466b2b9b2SJ. Bruce Fields goto out_put_session; 3665868b89c3SMi Jinlong 3666ae82a8d0SMi Jinlong status = nfserr_req_too_big; 3667ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 366866b2b9b2SJ. Bruce Fields goto out_put_session; 3669ae82a8d0SMi Jinlong 3670b85d4c01SBenny Halevy status = nfserr_badslot; 36716c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 367266b2b9b2SJ. Bruce Fields goto out_put_session; 3673b85d4c01SBenny Halevy 3674557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 3675b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 3676b85d4c01SBenny Halevy 3677a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 3678a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 3679a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 3680a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 3681a8dfdaebSAndy Adamson 368273e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 368373e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 3684b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 3685bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 3686bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 368766b2b9b2SJ. Bruce Fields goto out_put_session; 368853da6a53SJ. Bruce Fields status = nfserr_seq_false_retry; 368953da6a53SJ. Bruce Fields if (!replay_matches_cache(rqstp, seq, slot)) 369053da6a53SJ. Bruce Fields goto out_put_session; 3691b85d4c01SBenny Halevy cstate->slot = slot; 3692b85d4c01SBenny Halevy cstate->session = session; 36934b24ca7dSJeff Layton cstate->clp = clp; 3694da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 3695557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 3696bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 3697da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 3698aaf84eb9SBenny Halevy goto out; 3699b85d4c01SBenny Halevy } 3700b85d4c01SBenny Halevy if (status) 370166b2b9b2SJ. Bruce Fields goto out_put_session; 3702b85d4c01SBenny Halevy 370357266a6eSJ. Bruce Fields status = nfsd4_sequence_check_conn(conn, session); 3704a663bdd8SJ. Bruce Fields conn = NULL; 370557266a6eSJ. Bruce Fields if (status) 370657266a6eSJ. Bruce Fields goto out_put_session; 3707328ead28SJ. Bruce Fields 370847ee5298SJ. Bruce Fields buflen = (seq->cachethis) ? 370947ee5298SJ. Bruce Fields session->se_fchannel.maxresp_cached : 371047ee5298SJ. Bruce Fields session->se_fchannel.maxresp_sz; 371147ee5298SJ. Bruce Fields status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : 371247ee5298SJ. Bruce Fields nfserr_rep_too_big; 3713a5cddc88SJ. Bruce Fields if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) 371447ee5298SJ. Bruce Fields goto out_put_session; 371532aaa62eSJ. Bruce Fields svc_reserve(rqstp, buflen); 371647ee5298SJ. Bruce Fields 371747ee5298SJ. Bruce Fields status = nfs_ok; 3718b85d4c01SBenny Halevy /* Success! bump slot seqid */ 3719b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 3720bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 372173e79482SJ. Bruce Fields if (seq->cachethis) 372273e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 3723bf5c43c8SJ. Bruce Fields else 3724bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 3725b85d4c01SBenny Halevy 3726b85d4c01SBenny Halevy cstate->slot = slot; 3727b85d4c01SBenny Halevy cstate->session = session; 37284b24ca7dSJeff Layton cstate->clp = clp; 3729b85d4c01SBenny Halevy 3730b85d4c01SBenny Halevy out: 37315423732aSBenny Halevy switch (clp->cl_cb_state) { 37325423732aSBenny Halevy case NFSD4_CB_DOWN: 3733fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 37345423732aSBenny Halevy break; 37355423732aSBenny Halevy case NFSD4_CB_FAULT: 3736fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 37375423732aSBenny Halevy break; 3738fc0c3dd1SBenny Halevy default: 3739fc0c3dd1SBenny Halevy seq->status_flags = 0; 37405423732aSBenny Halevy } 37413bd64a5bSJ. Bruce Fields if (!list_empty(&clp->cl_revoked)) 37423bd64a5bSJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; 3743221a6876SJ. Bruce Fields out_no_session: 37443f42d2c4SKinglong Mee if (conn) 37453f42d2c4SKinglong Mee free_conn(conn); 3746c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 3747b85d4c01SBenny Halevy return status; 374866b2b9b2SJ. Bruce Fields out_put_session: 3749d4e19e70STrond Myklebust nfsd4_put_session_locked(session); 3750221a6876SJ. Bruce Fields goto out_no_session; 3751069b6ad4SAndy Adamson } 3752069b6ad4SAndy Adamson 3753b607664eSTrond Myklebust void 3754b607664eSTrond Myklebust nfsd4_sequence_done(struct nfsd4_compoundres *resp) 3755b607664eSTrond Myklebust { 3756b607664eSTrond Myklebust struct nfsd4_compound_state *cs = &resp->cstate; 3757b607664eSTrond Myklebust 3758b607664eSTrond Myklebust if (nfsd4_has_session(cs)) { 3759b607664eSTrond Myklebust if (cs->status != nfserr_replay_cache) { 3760b607664eSTrond Myklebust nfsd4_store_cache_entry(resp); 3761b607664eSTrond Myklebust cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; 3762b607664eSTrond Myklebust } 3763d4e19e70STrond Myklebust /* Drop session reference that was taken in nfsd4_sequence() */ 3764b607664eSTrond Myklebust nfsd4_put_session(cs->session); 37654b24ca7dSJeff Layton } else if (cs->clp) 37664b24ca7dSJeff Layton put_client_renew(cs->clp); 3767b607664eSTrond Myklebust } 3768b607664eSTrond Myklebust 3769345c2842SMi Jinlong __be32 3770eb69853dSChristoph Hellwig nfsd4_destroy_clientid(struct svc_rqst *rqstp, 3771eb69853dSChristoph Hellwig struct nfsd4_compound_state *cstate, 3772eb69853dSChristoph Hellwig union nfsd4_op_u *u) 3773345c2842SMi Jinlong { 3774eb69853dSChristoph Hellwig struct nfsd4_destroy_clientid *dc = &u->destroy_clientid; 37756b10ad19STrond Myklebust struct nfs4_client *conf, *unconf; 37766b10ad19STrond Myklebust struct nfs4_client *clp = NULL; 377757b7b43bSJ. Bruce Fields __be32 status = 0; 37788daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 3779345c2842SMi Jinlong 37806b10ad19STrond Myklebust spin_lock(&nn->client_lock); 37810a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&dc->clientid, true, nn); 37828daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&dc->clientid, true, nn); 378378389046SJ. Bruce Fields WARN_ON_ONCE(conf && unconf); 3784345c2842SMi Jinlong 3785345c2842SMi Jinlong if (conf) { 3786c0293b01SJ. Bruce Fields if (client_has_state(conf)) { 3787345c2842SMi Jinlong status = nfserr_clientid_busy; 3788345c2842SMi Jinlong goto out; 3789345c2842SMi Jinlong } 3790fd699b8aSJeff Layton status = mark_client_expired_locked(conf); 3791fd699b8aSJeff Layton if (status) 3792fd699b8aSJeff Layton goto out; 37936b10ad19STrond Myklebust clp = conf; 3794345c2842SMi Jinlong } else if (unconf) 3795345c2842SMi Jinlong clp = unconf; 3796345c2842SMi Jinlong else { 3797345c2842SMi Jinlong status = nfserr_stale_clientid; 3798345c2842SMi Jinlong goto out; 3799345c2842SMi Jinlong } 3800dedeb13fSAndrew Elble if (!nfsd4_mach_creds_match(clp, rqstp)) { 38016b10ad19STrond Myklebust clp = NULL; 380257266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 380357266a6eSJ. Bruce Fields goto out; 380457266a6eSJ. Bruce Fields } 38056b10ad19STrond Myklebust unhash_client_locked(clp); 3806345c2842SMi Jinlong out: 38076b10ad19STrond Myklebust spin_unlock(&nn->client_lock); 38086b10ad19STrond Myklebust if (clp) 38096b10ad19STrond Myklebust expire_client(clp); 3810345c2842SMi Jinlong return status; 3811345c2842SMi Jinlong } 3812345c2842SMi Jinlong 3813069b6ad4SAndy Adamson __be32 3814eb69853dSChristoph Hellwig nfsd4_reclaim_complete(struct svc_rqst *rqstp, 3815eb69853dSChristoph Hellwig struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 38164dc6ec00SJ. Bruce Fields { 3817eb69853dSChristoph Hellwig struct nfsd4_reclaim_complete *rc = &u->reclaim_complete; 381857b7b43bSJ. Bruce Fields __be32 status = 0; 3819bcecf1ccSMi Jinlong 38204dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 38214dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 38224dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 38234dc6ec00SJ. Bruce Fields /* 38244dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 38254dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 38264dc6ec00SJ. Bruce Fields */ 38274dc6ec00SJ. Bruce Fields return nfs_ok; 38284dc6ec00SJ. Bruce Fields } 3829bcecf1ccSMi Jinlong 3830bcecf1ccSMi Jinlong status = nfserr_complete_already; 3831a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 3832a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 3833bcecf1ccSMi Jinlong goto out; 3834bcecf1ccSMi Jinlong 3835bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 3836bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 38374dc6ec00SJ. Bruce Fields /* 38384dc6ec00SJ. Bruce Fields * The following error isn't really legal. 38394dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 38404dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 38414dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 38424dc6ec00SJ. Bruce Fields * client. 38434dc6ec00SJ. Bruce Fields */ 3844bcecf1ccSMi Jinlong goto out; 3845bcecf1ccSMi Jinlong 3846bcecf1ccSMi Jinlong status = nfs_ok; 38472a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 3848362063a5SScott Mayhew inc_reclaim_complete(cstate->session->se_client); 3849bcecf1ccSMi Jinlong out: 3850bcecf1ccSMi Jinlong return status; 38514dc6ec00SJ. Bruce Fields } 38524dc6ec00SJ. Bruce Fields 38534dc6ec00SJ. Bruce Fields __be32 3854b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3855eb69853dSChristoph Hellwig union nfsd4_op_u *u) 38561da177e4SLinus Torvalds { 3857eb69853dSChristoph Hellwig struct nfsd4_setclientid *setclid = &u->setclientid; 3858a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 38591da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 38603dbacee6STrond Myklebust struct nfs4_client *conf, *new; 38613dbacee6STrond Myklebust struct nfs4_client *unconf = NULL; 3862b37ad28bSAl Viro __be32 status; 3863c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 3864a55370a3SNeilBrown 38655cc40fd7STrond Myklebust new = create_client(clname, rqstp, &clverifier); 38665cc40fd7STrond Myklebust if (new == NULL) 38675cc40fd7STrond Myklebust return nfserr_jukebox; 386863db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 38693dbacee6STrond Myklebust spin_lock(&nn->client_lock); 3870382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&clname, nn); 38712b634821SJ. Bruce Fields if (conf && client_has_state(conf)) { 387263db4632SJ. Bruce Fields /* case 0: */ 38731da177e4SLinus Torvalds status = nfserr_clid_inuse; 3874e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 3875e203d506SJ. Bruce Fields goto out; 3876026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 3877dd5e3fbcSChuck Lever trace_nfsd_clid_inuse_err(conf); 38781da177e4SLinus Torvalds goto out; 38791da177e4SLinus Torvalds } 38801da177e4SLinus Torvalds } 3881a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&clname, nn); 38821da177e4SLinus Torvalds if (unconf) 38833dbacee6STrond Myklebust unhash_client_locked(unconf); 388445f56da8SChuck Lever /* We need to handle only case 1: probable callback update */ 388541eb1670SKinglong Mee if (conf && same_verf(&conf->cl_verifier, &clverifier)) { 38861da177e4SLinus Torvalds copy_clid(new, conf); 388741eb1670SKinglong Mee gen_confirm(new, nn); 388845f56da8SChuck Lever } 38898323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 38906f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 3891ac55fdc4SJeff Layton add_to_unconfirmed(new); 38921da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 38931da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 38941da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 38955cc40fd7STrond Myklebust new = NULL; 38961da177e4SLinus Torvalds status = nfs_ok; 38971da177e4SLinus Torvalds out: 38983dbacee6STrond Myklebust spin_unlock(&nn->client_lock); 38995cc40fd7STrond Myklebust if (new) 39005cc40fd7STrond Myklebust free_client(new); 39013dbacee6STrond Myklebust if (unconf) 39023dbacee6STrond Myklebust expire_client(unconf); 39031da177e4SLinus Torvalds return status; 39041da177e4SLinus Torvalds } 39051da177e4SLinus Torvalds 39061da177e4SLinus Torvalds 3907b37ad28bSAl Viro __be32 3908b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 3909b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3910eb69853dSChristoph Hellwig union nfsd4_op_u *u) 39111da177e4SLinus Torvalds { 3912eb69853dSChristoph Hellwig struct nfsd4_setclientid_confirm *setclientid_confirm = 3913eb69853dSChristoph Hellwig &u->setclientid_confirm; 391421ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 3915d20c11d8SJeff Layton struct nfs4_client *old = NULL; 39161da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 39171da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 3918b37ad28bSAl Viro __be32 status; 39197f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 39201da177e4SLinus Torvalds 39212c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 39221da177e4SLinus Torvalds return nfserr_stale_clientid; 392321ab45a4SNeilBrown 3924d20c11d8SJeff Layton spin_lock(&nn->client_lock); 39258daae4dcSStanislav Kinsbursky conf = find_confirmed_client(clid, false, nn); 39260a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(clid, false, nn); 3927a186e767SJ. Bruce Fields /* 39288695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 39298695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 3930f984a7ceSJ. Bruce Fields * the client may be buggy; this should never happen. 3931f984a7ceSJ. Bruce Fields * 3932f984a7ceSJ. Bruce Fields * Nevertheless, RFC 7530 recommends INUSE for this case: 3933a186e767SJ. Bruce Fields */ 3934f984a7ceSJ. Bruce Fields status = nfserr_clid_inuse; 39358695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 39368695b90aSJ. Bruce Fields goto out; 39378695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 39388695b90aSJ. Bruce Fields goto out; 393963db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 394090d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 39417d22fc11SJ. Bruce Fields if (conf && same_verf(&confirm, &conf->cl_confirm)) { 39427d22fc11SJ. Bruce Fields /* case 2: probable retransmit */ 394390d700b7SJ. Bruce Fields status = nfs_ok; 39447d22fc11SJ. Bruce Fields } else /* case 4: client hasn't noticed we rebooted yet? */ 394590d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 394690d700b7SJ. Bruce Fields goto out; 394790d700b7SJ. Bruce Fields } 394890d700b7SJ. Bruce Fields status = nfs_ok; 394990d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 3950d20c11d8SJeff Layton old = unconf; 3951d20c11d8SJeff Layton unhash_client_locked(old); 39525a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 395390d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 3954d20c11d8SJeff Layton old = find_confirmed_client_by_name(&unconf->cl_name, nn); 3955d20c11d8SJeff Layton if (old) { 39562b634821SJ. Bruce Fields status = nfserr_clid_inuse; 39572b634821SJ. Bruce Fields if (client_has_state(old) 39582b634821SJ. Bruce Fields && !same_creds(&unconf->cl_cred, 39592b634821SJ. Bruce Fields &old->cl_cred)) 39602b634821SJ. Bruce Fields goto out; 3961d20c11d8SJeff Layton status = mark_client_expired_locked(old); 39627abea1e8SJeff Layton if (status) { 39637abea1e8SJeff Layton old = NULL; 3964221a6876SJ. Bruce Fields goto out; 3965221a6876SJ. Bruce Fields } 39667abea1e8SJeff Layton } 39671da177e4SLinus Torvalds move_to_confirmed(unconf); 3968d20c11d8SJeff Layton conf = unconf; 396908e8987cSNeilBrown } 3970d20c11d8SJeff Layton get_client_locked(conf); 3971d20c11d8SJeff Layton spin_unlock(&nn->client_lock); 3972d20c11d8SJeff Layton nfsd4_probe_callback(conf); 3973d20c11d8SJeff Layton spin_lock(&nn->client_lock); 3974d20c11d8SJeff Layton put_client_renew_locked(conf); 39751da177e4SLinus Torvalds out: 3976d20c11d8SJeff Layton spin_unlock(&nn->client_lock); 3977d20c11d8SJeff Layton if (old) 3978d20c11d8SJeff Layton expire_client(old); 39791da177e4SLinus Torvalds return status; 39801da177e4SLinus Torvalds } 39811da177e4SLinus Torvalds 398232513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 39831da177e4SLinus Torvalds { 398432513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 398532513b40SJ. Bruce Fields } 398632513b40SJ. Bruce Fields 398732513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 39885b095e99SJeff Layton static void nfsd4_init_file(struct knfsd_fh *fh, unsigned int hashval, 39895b095e99SJeff Layton struct nfs4_file *fp) 399032513b40SJ. Bruce Fields { 3991950e0118STrond Myklebust lockdep_assert_held(&state_lock); 3992950e0118STrond Myklebust 3993818a34ebSElena Reshetova refcount_set(&fp->fi_ref, 1); 39941d31a253STrond Myklebust spin_lock_init(&fp->fi_lock); 39958beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 39968beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 39978287f009SSachin Bhamare INIT_LIST_HEAD(&fp->fi_clnt_odstate); 3998e2cf80d7STrond Myklebust fh_copy_shallow(&fp->fi_fhandle, fh); 39990c637be8SJeff Layton fp->fi_deleg_file = NULL; 400047f9940cSMeelap Shah fp->fi_had_conflict = false; 4001baeb4ff0SJeff Layton fp->fi_share_deny = 0; 4002f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 4003f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 40049cf514ccSChristoph Hellwig #ifdef CONFIG_NFSD_PNFS 40059cf514ccSChristoph Hellwig INIT_LIST_HEAD(&fp->fi_lo_states); 4006c5c707f9SChristoph Hellwig atomic_set(&fp->fi_lo_recalls, 0); 40079cf514ccSChristoph Hellwig #endif 40085b095e99SJeff Layton hlist_add_head_rcu(&fp->fi_hash, &file_hashtbl[hashval]); 40091da177e4SLinus Torvalds } 40101da177e4SLinus Torvalds 4011e8ff2a84SJ. Bruce Fields void 4012e60d4398SNeilBrown nfsd4_free_slabs(void) 4013e60d4398SNeilBrown { 40149258a2d5SJeff Layton kmem_cache_destroy(client_slab); 4015abf1135bSChristoph Hellwig kmem_cache_destroy(openowner_slab); 4016abf1135bSChristoph Hellwig kmem_cache_destroy(lockowner_slab); 4017abf1135bSChristoph Hellwig kmem_cache_destroy(file_slab); 4018abf1135bSChristoph Hellwig kmem_cache_destroy(stateid_slab); 4019abf1135bSChristoph Hellwig kmem_cache_destroy(deleg_slab); 40209258a2d5SJeff Layton kmem_cache_destroy(odstate_slab); 4021e60d4398SNeilBrown } 40221da177e4SLinus Torvalds 402372083396SBryan Schumaker int 40241da177e4SLinus Torvalds nfsd4_init_slabs(void) 40251da177e4SLinus Torvalds { 40269258a2d5SJeff Layton client_slab = kmem_cache_create("nfsd4_clients", 40279258a2d5SJeff Layton sizeof(struct nfs4_client), 0, 0, NULL); 40289258a2d5SJeff Layton if (client_slab == NULL) 40299258a2d5SJeff Layton goto out; 4030fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 4031fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 4032fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 40339258a2d5SJeff Layton goto out_free_client_slab; 4034fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 40353c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 4036fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 4037abf1135bSChristoph Hellwig goto out_free_openowner_slab; 4038e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 403920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 4040e60d4398SNeilBrown if (file_slab == NULL) 4041abf1135bSChristoph Hellwig goto out_free_lockowner_slab; 40425ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 4043dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 40445ac049acSNeilBrown if (stateid_slab == NULL) 4045abf1135bSChristoph Hellwig goto out_free_file_slab; 40465b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 404720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 40485b2d21c1SNeilBrown if (deleg_slab == NULL) 4049abf1135bSChristoph Hellwig goto out_free_stateid_slab; 40508287f009SSachin Bhamare odstate_slab = kmem_cache_create("nfsd4_odstate", 40518287f009SSachin Bhamare sizeof(struct nfs4_clnt_odstate), 0, 0, NULL); 40528287f009SSachin Bhamare if (odstate_slab == NULL) 40538287f009SSachin Bhamare goto out_free_deleg_slab; 4054e60d4398SNeilBrown return 0; 4055abf1135bSChristoph Hellwig 40568287f009SSachin Bhamare out_free_deleg_slab: 40578287f009SSachin Bhamare kmem_cache_destroy(deleg_slab); 4058abf1135bSChristoph Hellwig out_free_stateid_slab: 4059abf1135bSChristoph Hellwig kmem_cache_destroy(stateid_slab); 4060abf1135bSChristoph Hellwig out_free_file_slab: 4061abf1135bSChristoph Hellwig kmem_cache_destroy(file_slab); 4062abf1135bSChristoph Hellwig out_free_lockowner_slab: 4063abf1135bSChristoph Hellwig kmem_cache_destroy(lockowner_slab); 4064abf1135bSChristoph Hellwig out_free_openowner_slab: 4065abf1135bSChristoph Hellwig kmem_cache_destroy(openowner_slab); 40669258a2d5SJeff Layton out_free_client_slab: 40679258a2d5SJeff Layton kmem_cache_destroy(client_slab); 4068abf1135bSChristoph Hellwig out: 40691da177e4SLinus Torvalds return -ENOMEM; 40701da177e4SLinus Torvalds } 40711da177e4SLinus Torvalds 4072ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 4073ff194bd9SJ. Bruce Fields { 4074ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 4075ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 4076ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 407758fb12e6SJeff Layton mutex_init(&rp->rp_mutex); 407858fb12e6SJeff Layton } 407958fb12e6SJeff Layton 408058fb12e6SJeff Layton static void nfsd4_cstate_assign_replay(struct nfsd4_compound_state *cstate, 408158fb12e6SJeff Layton struct nfs4_stateowner *so) 408258fb12e6SJeff Layton { 408358fb12e6SJeff Layton if (!nfsd4_has_session(cstate)) { 408458fb12e6SJeff Layton mutex_lock(&so->so_replay.rp_mutex); 4085b5971afaSKinglong Mee cstate->replay_owner = nfs4_get_stateowner(so); 408658fb12e6SJeff Layton } 408758fb12e6SJeff Layton } 408858fb12e6SJeff Layton 408958fb12e6SJeff Layton void nfsd4_cstate_clear_replay(struct nfsd4_compound_state *cstate) 409058fb12e6SJeff Layton { 409158fb12e6SJeff Layton struct nfs4_stateowner *so = cstate->replay_owner; 409258fb12e6SJeff Layton 409358fb12e6SJeff Layton if (so != NULL) { 409458fb12e6SJeff Layton cstate->replay_owner = NULL; 409558fb12e6SJeff Layton mutex_unlock(&so->so_replay.rp_mutex); 409658fb12e6SJeff Layton nfs4_put_stateowner(so); 409758fb12e6SJeff Layton } 4098ff194bd9SJ. Bruce Fields } 4099ff194bd9SJ. Bruce Fields 4100fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 41011da177e4SLinus Torvalds { 41021da177e4SLinus Torvalds struct nfs4_stateowner *sop; 41031da177e4SLinus Torvalds 4104fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 4105ff194bd9SJ. Bruce Fields if (!sop) 4106ff194bd9SJ. Bruce Fields return NULL; 4107ff194bd9SJ. Bruce Fields 41086f4859b8SJ. Bruce Fields xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL); 4109ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 4110fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 4111ff194bd9SJ. Bruce Fields return NULL; 4112ff194bd9SJ. Bruce Fields } 4113ff194bd9SJ. Bruce Fields 4114ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 4115ff194bd9SJ. Bruce Fields sop->so_client = clp; 4116ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 41176b180f0bSJeff Layton atomic_set(&sop->so_count, 1); 41181da177e4SLinus Torvalds return sop; 41191da177e4SLinus Torvalds } 4120ff194bd9SJ. Bruce Fields 4121fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 4122ff194bd9SJ. Bruce Fields { 4123d4f0489fSTrond Myklebust lockdep_assert_held(&clp->cl_lock); 41249b531137SStanislav Kinsbursky 4125d4f0489fSTrond Myklebust list_add(&oo->oo_owner.so_strhash, 4126d4f0489fSTrond Myklebust &clp->cl_ownerstr_hashtbl[strhashval]); 4127fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 41281da177e4SLinus Torvalds } 41291da177e4SLinus Torvalds 41308f4b54c5SJeff Layton static void nfs4_unhash_openowner(struct nfs4_stateowner *so) 41318f4b54c5SJeff Layton { 4132d4f0489fSTrond Myklebust unhash_openowner_locked(openowner(so)); 41338f4b54c5SJeff Layton } 41348f4b54c5SJeff Layton 41356b180f0bSJeff Layton static void nfs4_free_openowner(struct nfs4_stateowner *so) 41366b180f0bSJeff Layton { 41376b180f0bSJeff Layton struct nfs4_openowner *oo = openowner(so); 41386b180f0bSJeff Layton 41396b180f0bSJeff Layton kmem_cache_free(openowner_slab, oo); 41406b180f0bSJeff Layton } 41416b180f0bSJeff Layton 41426b180f0bSJeff Layton static const struct nfs4_stateowner_operations openowner_ops = { 41438f4b54c5SJeff Layton .so_unhash = nfs4_unhash_openowner, 41446b180f0bSJeff Layton .so_free = nfs4_free_openowner, 41456b180f0bSJeff Layton }; 41466b180f0bSJeff Layton 41477fc0564eSAndrew Elble static struct nfs4_ol_stateid * 41487fc0564eSAndrew Elble nfsd4_find_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) 41497fc0564eSAndrew Elble { 41507fc0564eSAndrew Elble struct nfs4_ol_stateid *local, *ret = NULL; 41517fc0564eSAndrew Elble struct nfs4_openowner *oo = open->op_openowner; 41527fc0564eSAndrew Elble 41537fc0564eSAndrew Elble lockdep_assert_held(&fp->fi_lock); 41547fc0564eSAndrew Elble 41557fc0564eSAndrew Elble list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 41567fc0564eSAndrew Elble /* ignore lock owners */ 41577fc0564eSAndrew Elble if (local->st_stateowner->so_is_open_owner == 0) 41587fc0564eSAndrew Elble continue; 415915ca08d3STrond Myklebust if (local->st_stateowner != &oo->oo_owner) 416015ca08d3STrond Myklebust continue; 416115ca08d3STrond Myklebust if (local->st_stid.sc_type == NFS4_OPEN_STID) { 41627fc0564eSAndrew Elble ret = local; 4163a15dfcd5SElena Reshetova refcount_inc(&ret->st_stid.sc_count); 41647fc0564eSAndrew Elble break; 41657fc0564eSAndrew Elble } 41667fc0564eSAndrew Elble } 41677fc0564eSAndrew Elble return ret; 41687fc0564eSAndrew Elble } 41697fc0564eSAndrew Elble 417015ca08d3STrond Myklebust static __be32 417115ca08d3STrond Myklebust nfsd4_verify_open_stid(struct nfs4_stid *s) 417215ca08d3STrond Myklebust { 417315ca08d3STrond Myklebust __be32 ret = nfs_ok; 417415ca08d3STrond Myklebust 417515ca08d3STrond Myklebust switch (s->sc_type) { 417615ca08d3STrond Myklebust default: 417715ca08d3STrond Myklebust break; 41784f176417STrond Myklebust case 0: 417915ca08d3STrond Myklebust case NFS4_CLOSED_STID: 418015ca08d3STrond Myklebust case NFS4_CLOSED_DELEG_STID: 418115ca08d3STrond Myklebust ret = nfserr_bad_stateid; 418215ca08d3STrond Myklebust break; 418315ca08d3STrond Myklebust case NFS4_REVOKED_DELEG_STID: 418415ca08d3STrond Myklebust ret = nfserr_deleg_revoked; 418515ca08d3STrond Myklebust } 418615ca08d3STrond Myklebust return ret; 418715ca08d3STrond Myklebust } 418815ca08d3STrond Myklebust 418915ca08d3STrond Myklebust /* Lock the stateid st_mutex, and deal with races with CLOSE */ 419015ca08d3STrond Myklebust static __be32 419115ca08d3STrond Myklebust nfsd4_lock_ol_stateid(struct nfs4_ol_stateid *stp) 419215ca08d3STrond Myklebust { 419315ca08d3STrond Myklebust __be32 ret; 419415ca08d3STrond Myklebust 41954f34bd05SAndrew Elble mutex_lock_nested(&stp->st_mutex, LOCK_STATEID_MUTEX); 419615ca08d3STrond Myklebust ret = nfsd4_verify_open_stid(&stp->st_stid); 419715ca08d3STrond Myklebust if (ret != nfs_ok) 419815ca08d3STrond Myklebust mutex_unlock(&stp->st_mutex); 419915ca08d3STrond Myklebust return ret; 420015ca08d3STrond Myklebust } 420115ca08d3STrond Myklebust 420215ca08d3STrond Myklebust static struct nfs4_ol_stateid * 420315ca08d3STrond Myklebust nfsd4_find_and_lock_existing_open(struct nfs4_file *fp, struct nfsd4_open *open) 420415ca08d3STrond Myklebust { 420515ca08d3STrond Myklebust struct nfs4_ol_stateid *stp; 420615ca08d3STrond Myklebust for (;;) { 420715ca08d3STrond Myklebust spin_lock(&fp->fi_lock); 420815ca08d3STrond Myklebust stp = nfsd4_find_existing_open(fp, open); 420915ca08d3STrond Myklebust spin_unlock(&fp->fi_lock); 421015ca08d3STrond Myklebust if (!stp || nfsd4_lock_ol_stateid(stp) == nfs_ok) 421115ca08d3STrond Myklebust break; 421215ca08d3STrond Myklebust nfs4_put_stid(&stp->st_stid); 421315ca08d3STrond Myklebust } 421415ca08d3STrond Myklebust return stp; 421515ca08d3STrond Myklebust } 421615ca08d3STrond Myklebust 4217fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 421813d6f66bSTrond Myklebust alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, 4219db24b3b4SJeff Layton struct nfsd4_compound_state *cstate) 4220db24b3b4SJeff Layton { 422113d6f66bSTrond Myklebust struct nfs4_client *clp = cstate->clp; 42227ffb5880STrond Myklebust struct nfs4_openowner *oo, *ret; 42231da177e4SLinus Torvalds 4224fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 4225fe0750e5SJ. Bruce Fields if (!oo) 42261da177e4SLinus Torvalds return NULL; 42276b180f0bSJeff Layton oo->oo_owner.so_ops = &openowner_ops; 4228fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 4229fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 4230d3134b10SJeff Layton oo->oo_flags = 0; 4231db24b3b4SJeff Layton if (nfsd4_has_session(cstate)) 4232db24b3b4SJeff Layton oo->oo_flags |= NFS4_OO_CONFIRMED; 4233fe0750e5SJ. Bruce Fields oo->oo_time = 0; 423438c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 4235fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 4236d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 4237d4f0489fSTrond Myklebust ret = find_openstateowner_str_locked(strhashval, open, clp); 42387ffb5880STrond Myklebust if (ret == NULL) { 4239fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 42407ffb5880STrond Myklebust ret = oo; 42417ffb5880STrond Myklebust } else 4242d50ffdedSKinglong Mee nfs4_free_stateowner(&oo->oo_owner); 4243d50ffdedSKinglong Mee 4244d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 4245c5952338SJeff Layton return ret; 42461da177e4SLinus Torvalds } 42471da177e4SLinus Torvalds 42487fc0564eSAndrew Elble static struct nfs4_ol_stateid * 42498c7245abSOleg Drokin init_open_stateid(struct nfs4_file *fp, struct nfsd4_open *open) 42507fc0564eSAndrew Elble { 42511da177e4SLinus Torvalds 42527fc0564eSAndrew Elble struct nfs4_openowner *oo = open->op_openowner; 42537fc0564eSAndrew Elble struct nfs4_ol_stateid *retstp = NULL; 42548c7245abSOleg Drokin struct nfs4_ol_stateid *stp; 42557fc0564eSAndrew Elble 42568c7245abSOleg Drokin stp = open->op_stp; 42575cc1fb2aSOleg Drokin /* We are moving these outside of the spinlocks to avoid the warnings */ 42585cc1fb2aSOleg Drokin mutex_init(&stp->st_mutex); 42594f34bd05SAndrew Elble mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); 42605cc1fb2aSOleg Drokin 426115ca08d3STrond Myklebust retry: 42627fc0564eSAndrew Elble spin_lock(&oo->oo_owner.so_client->cl_lock); 42637fc0564eSAndrew Elble spin_lock(&fp->fi_lock); 42647fc0564eSAndrew Elble 42657fc0564eSAndrew Elble retstp = nfsd4_find_existing_open(fp, open); 42667fc0564eSAndrew Elble if (retstp) 42677fc0564eSAndrew Elble goto out_unlock; 42688c7245abSOleg Drokin 42698c7245abSOleg Drokin open->op_stp = NULL; 4270a15dfcd5SElena Reshetova refcount_inc(&stp->st_stid.sc_count); 42713abdb607SJ. Bruce Fields stp->st_stid.sc_type = NFS4_OPEN_STID; 42723c87b9b7STrond Myklebust INIT_LIST_HEAD(&stp->st_locks); 4273b5971afaSKinglong Mee stp->st_stateowner = nfs4_get_stateowner(&oo->oo_owner); 427413cd2184SNeilBrown get_nfs4_file(fp); 427511b9164aSTrond Myklebust stp->st_stid.sc_file = fp; 42761da177e4SLinus Torvalds stp->st_access_bmap = 0; 42771da177e4SLinus Torvalds stp->st_deny_bmap = 0; 42784c4cd222SNeilBrown stp->st_openstp = NULL; 42791c755dc1SJeff Layton list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 42801d31a253STrond Myklebust list_add(&stp->st_perfile, &fp->fi_stateids); 42817fc0564eSAndrew Elble 42827fc0564eSAndrew Elble out_unlock: 42831d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 42841c755dc1SJeff Layton spin_unlock(&oo->oo_owner.so_client->cl_lock); 42855cc1fb2aSOleg Drokin if (retstp) { 428615ca08d3STrond Myklebust /* Handle races with CLOSE */ 428715ca08d3STrond Myklebust if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { 428815ca08d3STrond Myklebust nfs4_put_stid(&retstp->st_stid); 428915ca08d3STrond Myklebust goto retry; 429015ca08d3STrond Myklebust } 42918c7245abSOleg Drokin /* To keep mutex tracking happy */ 42925cc1fb2aSOleg Drokin mutex_unlock(&stp->st_mutex); 42938c7245abSOleg Drokin stp = retstp; 42945cc1fb2aSOleg Drokin } 42958c7245abSOleg Drokin return stp; 42961da177e4SLinus Torvalds } 42971da177e4SLinus Torvalds 4298d3134b10SJeff Layton /* 4299d3134b10SJeff Layton * In the 4.0 case we need to keep the owners around a little while to handle 4300d3134b10SJeff Layton * CLOSE replay. We still do need to release any file access that is held by 4301d3134b10SJeff Layton * them before returning however. 4302d3134b10SJeff Layton */ 43031da177e4SLinus Torvalds static void 4304d3134b10SJeff Layton move_to_close_lru(struct nfs4_ol_stateid *s, struct net *net) 43051da177e4SLinus Torvalds { 4306217526e7SJeff Layton struct nfs4_ol_stateid *last; 4307d3134b10SJeff Layton struct nfs4_openowner *oo = openowner(s->st_stateowner); 4308d3134b10SJeff Layton struct nfsd_net *nn = net_generic(s->st_stid.sc_client->net, 4309d3134b10SJeff Layton nfsd_net_id); 431073758fedSStanislav Kinsbursky 4311fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 43121da177e4SLinus Torvalds 4313b401be22SJeff Layton /* 4314b401be22SJeff Layton * We know that we hold one reference via nfsd4_close, and another 4315b401be22SJeff Layton * "persistent" reference for the client. If the refcount is higher 4316b401be22SJeff Layton * than 2, then there are still calls in progress that are using this 4317b401be22SJeff Layton * stateid. We can't put the sc_file reference until they are finished. 4318b401be22SJeff Layton * Wait for the refcount to drop to 2. Since it has been unhashed, 4319b401be22SJeff Layton * there should be no danger of the refcount going back up again at 4320b401be22SJeff Layton * this point. 4321b401be22SJeff Layton */ 4322a15dfcd5SElena Reshetova wait_event(close_wq, refcount_read(&s->st_stid.sc_count) == 2); 4323b401be22SJeff Layton 4324d3134b10SJeff Layton release_all_access(s); 4325d3134b10SJeff Layton if (s->st_stid.sc_file) { 4326d3134b10SJeff Layton put_nfs4_file(s->st_stid.sc_file); 4327d3134b10SJeff Layton s->st_stid.sc_file = NULL; 4328d3134b10SJeff Layton } 4329217526e7SJeff Layton 4330217526e7SJeff Layton spin_lock(&nn->client_lock); 4331217526e7SJeff Layton last = oo->oo_last_closed_stid; 4332d3134b10SJeff Layton oo->oo_last_closed_stid = s; 433373758fedSStanislav Kinsbursky list_move_tail(&oo->oo_close_lru, &nn->close_lru); 433420b7d86fSArnd Bergmann oo->oo_time = ktime_get_boottime_seconds(); 4335217526e7SJeff Layton spin_unlock(&nn->client_lock); 4336217526e7SJeff Layton if (last) 4337217526e7SJeff Layton nfs4_put_stid(&last->st_stid); 43381da177e4SLinus Torvalds } 43391da177e4SLinus Torvalds 43401da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 43411da177e4SLinus Torvalds static struct nfs4_file * 43425b095e99SJeff Layton find_file_locked(struct knfsd_fh *fh, unsigned int hashval) 43431da177e4SLinus Torvalds { 43441da177e4SLinus Torvalds struct nfs4_file *fp; 43451da177e4SLinus Torvalds 434636a80491SMadhuparna Bhowmik hlist_for_each_entry_rcu(fp, &file_hashtbl[hashval], fi_hash, 434736a80491SMadhuparna Bhowmik lockdep_is_held(&state_lock)) { 43484d94c2efSChristoph Hellwig if (fh_match(&fp->fi_fhandle, fh)) { 4349818a34ebSElena Reshetova if (refcount_inc_not_zero(&fp->fi_ref)) 43501da177e4SLinus Torvalds return fp; 43511da177e4SLinus Torvalds } 435213cd2184SNeilBrown } 43531da177e4SLinus Torvalds return NULL; 43541da177e4SLinus Torvalds } 43551da177e4SLinus Torvalds 4356e6ba76e1SChristoph Hellwig struct nfs4_file * 4357ca943217STrond Myklebust find_file(struct knfsd_fh *fh) 4358950e0118STrond Myklebust { 4359950e0118STrond Myklebust struct nfs4_file *fp; 43605b095e99SJeff Layton unsigned int hashval = file_hashval(fh); 4361950e0118STrond Myklebust 43625b095e99SJeff Layton rcu_read_lock(); 43635b095e99SJeff Layton fp = find_file_locked(fh, hashval); 43645b095e99SJeff Layton rcu_read_unlock(); 4365950e0118STrond Myklebust return fp; 4366950e0118STrond Myklebust } 4367950e0118STrond Myklebust 4368950e0118STrond Myklebust static struct nfs4_file * 4369f9c00c3aSJeff Layton find_or_add_file(struct nfs4_file *new, struct knfsd_fh *fh) 4370950e0118STrond Myklebust { 4371950e0118STrond Myklebust struct nfs4_file *fp; 43725b095e99SJeff Layton unsigned int hashval = file_hashval(fh); 43735b095e99SJeff Layton 43745b095e99SJeff Layton rcu_read_lock(); 43755b095e99SJeff Layton fp = find_file_locked(fh, hashval); 43765b095e99SJeff Layton rcu_read_unlock(); 43775b095e99SJeff Layton if (fp) 43785b095e99SJeff Layton return fp; 4379950e0118STrond Myklebust 4380950e0118STrond Myklebust spin_lock(&state_lock); 43815b095e99SJeff Layton fp = find_file_locked(fh, hashval); 43825b095e99SJeff Layton if (likely(fp == NULL)) { 43835b095e99SJeff Layton nfsd4_init_file(fh, hashval, new); 4384950e0118STrond Myklebust fp = new; 4385950e0118STrond Myklebust } 4386950e0118STrond Myklebust spin_unlock(&state_lock); 4387950e0118STrond Myklebust 4388950e0118STrond Myklebust return fp; 4389950e0118STrond Myklebust } 4390950e0118STrond Myklebust 43914f83aa30SJ. Bruce Fields /* 43921da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 43931da177e4SLinus Torvalds * WRITE with all zero or all one stateid 43941da177e4SLinus Torvalds */ 4395b37ad28bSAl Viro static __be32 43961da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 43971da177e4SLinus Torvalds { 43981da177e4SLinus Torvalds struct nfs4_file *fp; 4399baeb4ff0SJeff Layton __be32 ret = nfs_ok; 44001da177e4SLinus Torvalds 4401ca943217STrond Myklebust fp = find_file(¤t_fh->fh_handle); 440213cd2184SNeilBrown if (!fp) 4403baeb4ff0SJeff Layton return ret; 4404baeb4ff0SJeff Layton /* Check for conflicting share reservations */ 44051d31a253STrond Myklebust spin_lock(&fp->fi_lock); 4406baeb4ff0SJeff Layton if (fp->fi_share_deny & deny_type) 4407baeb4ff0SJeff Layton ret = nfserr_locked; 44081d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 440913cd2184SNeilBrown put_nfs4_file(fp); 441013cd2184SNeilBrown return ret; 44111da177e4SLinus Torvalds } 44121da177e4SLinus Torvalds 44130162ac2bSChristoph Hellwig static void nfsd4_cb_recall_prepare(struct nfsd4_callback *cb) 44141da177e4SLinus Torvalds { 44150162ac2bSChristoph Hellwig struct nfs4_delegation *dp = cb_to_delegation(cb); 441611b9164aSTrond Myklebust struct nfsd_net *nn = net_generic(dp->dl_stid.sc_client->net, 441711b9164aSTrond Myklebust nfsd_net_id); 4418e8c69d17SJ. Bruce Fields 441911b9164aSTrond Myklebust block_delegations(&dp->dl_stid.sc_file->fi_fhandle); 4420f54fe962SJeff Layton 442102e1215fSJeff Layton /* 442202e1215fSJeff Layton * We can't do this in nfsd_break_deleg_cb because it is 4423f54fe962SJeff Layton * already holding inode->i_lock. 4424f54fe962SJeff Layton * 4425dff1399fSJeff Layton * If the dl_time != 0, then we know that it has already been 4426dff1399fSJeff Layton * queued for a lease break. Don't queue it again. 4427dff1399fSJeff Layton */ 4428f54fe962SJeff Layton spin_lock(&state_lock); 4429dff1399fSJeff Layton if (dp->dl_time == 0) { 443020b7d86fSArnd Bergmann dp->dl_time = ktime_get_boottime_seconds(); 443102e1215fSJeff Layton list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); 443202e1215fSJeff Layton } 443302e1215fSJeff Layton spin_unlock(&state_lock); 4434dff1399fSJeff Layton } 44351da177e4SLinus Torvalds 44360162ac2bSChristoph Hellwig static int nfsd4_cb_recall_done(struct nfsd4_callback *cb, 44370162ac2bSChristoph Hellwig struct rpc_task *task) 44380162ac2bSChristoph Hellwig { 44390162ac2bSChristoph Hellwig struct nfs4_delegation *dp = cb_to_delegation(cb); 44400162ac2bSChristoph Hellwig 4441a457974fSAndrew Elble if (dp->dl_stid.sc_type == NFS4_CLOSED_DELEG_STID) 4442a457974fSAndrew Elble return 1; 4443a457974fSAndrew Elble 44440162ac2bSChristoph Hellwig switch (task->tk_status) { 44450162ac2bSChristoph Hellwig case 0: 44460162ac2bSChristoph Hellwig return 1; 44471c73b9d2SScott Mayhew case -NFS4ERR_DELAY: 44481c73b9d2SScott Mayhew rpc_delay(task, 2 * HZ); 44491c73b9d2SScott Mayhew return 0; 44500162ac2bSChristoph Hellwig case -EBADHANDLE: 44510162ac2bSChristoph Hellwig case -NFS4ERR_BAD_STATEID: 44520162ac2bSChristoph Hellwig /* 44530162ac2bSChristoph Hellwig * Race: client probably got cb_recall before open reply 44540162ac2bSChristoph Hellwig * granting delegation. 44550162ac2bSChristoph Hellwig */ 44560162ac2bSChristoph Hellwig if (dp->dl_retries--) { 44570162ac2bSChristoph Hellwig rpc_delay(task, 2 * HZ); 44580162ac2bSChristoph Hellwig return 0; 44590162ac2bSChristoph Hellwig } 44600162ac2bSChristoph Hellwig /*FALLTHRU*/ 44610162ac2bSChristoph Hellwig default: 44621c73b9d2SScott Mayhew return 1; 44630162ac2bSChristoph Hellwig } 44640162ac2bSChristoph Hellwig } 44650162ac2bSChristoph Hellwig 44660162ac2bSChristoph Hellwig static void nfsd4_cb_recall_release(struct nfsd4_callback *cb) 44670162ac2bSChristoph Hellwig { 44680162ac2bSChristoph Hellwig struct nfs4_delegation *dp = cb_to_delegation(cb); 44690162ac2bSChristoph Hellwig 44700162ac2bSChristoph Hellwig nfs4_put_stid(&dp->dl_stid); 44710162ac2bSChristoph Hellwig } 44720162ac2bSChristoph Hellwig 4473c4cb8974SJulia Lawall static const struct nfsd4_callback_ops nfsd4_cb_recall_ops = { 44740162ac2bSChristoph Hellwig .prepare = nfsd4_cb_recall_prepare, 44750162ac2bSChristoph Hellwig .done = nfsd4_cb_recall_done, 44760162ac2bSChristoph Hellwig .release = nfsd4_cb_recall_release, 44770162ac2bSChristoph Hellwig }; 44780162ac2bSChristoph Hellwig 447902e1215fSJeff Layton static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 448002e1215fSJeff Layton { 448102e1215fSJeff Layton /* 448202e1215fSJeff Layton * We're assuming the state code never drops its reference 448302e1215fSJeff Layton * without first removing the lease. Since we're in this lease 44844a269efbSJ. Bruce Fields * callback (and since the lease code is serialized by the 44854a269efbSJ. Bruce Fields * i_lock) we know the server hasn't removed the lease yet, and 44864a269efbSJ. Bruce Fields * we know it's safe to take a reference. 448702e1215fSJeff Layton */ 4488a15dfcd5SElena Reshetova refcount_inc(&dp->dl_stid.sc_count); 4489f0b5de1bSChristoph Hellwig nfsd4_run_cb(&dp->dl_recall); 44906b57d9c8SJ. Bruce Fields } 44916b57d9c8SJ. Bruce Fields 44921c8c601aSJeff Layton /* Called from break_lease() with i_lock held. */ 44934d01b7f5SJeff Layton static bool 44944d01b7f5SJeff Layton nfsd_break_deleg_cb(struct file_lock *fl) 44956b57d9c8SJ. Bruce Fields { 44964d01b7f5SJeff Layton bool ret = false; 4497653e514eSJ. Bruce Fields struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 4498653e514eSJ. Bruce Fields struct nfs4_file *fp = dp->dl_stid.sc_file; 44996b57d9c8SJ. Bruce Fields 4500dd5e3fbcSChuck Lever trace_nfsd_deleg_break(&dp->dl_stid.sc_stateid); 4501dd5e3fbcSChuck Lever 45020272e1fdSJ. Bruce Fields /* 45030272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 4504acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 45056b57d9c8SJ. Bruce Fields * in time: 45060272e1fdSJ. Bruce Fields */ 45070272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 45081da177e4SLinus Torvalds 450902e1215fSJeff Layton spin_lock(&fp->fi_lock); 4510417c6629SJeff Layton fp->fi_had_conflict = true; 45115d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 451202e1215fSJeff Layton spin_unlock(&fp->fi_lock); 45134d01b7f5SJeff Layton return ret; 45141da177e4SLinus Torvalds } 45151da177e4SLinus Torvalds 4516c45198edSJeff Layton static int 45177448cc37SJeff Layton nfsd_change_deleg_cb(struct file_lock *onlist, int arg, 45187448cc37SJeff Layton struct list_head *dispose) 45191da177e4SLinus Torvalds { 45201da177e4SLinus Torvalds if (arg & F_UNLCK) 4521c45198edSJeff Layton return lease_modify(onlist, arg, dispose); 45221da177e4SLinus Torvalds else 45231da177e4SLinus Torvalds return -EAGAIN; 45241da177e4SLinus Torvalds } 45251da177e4SLinus Torvalds 45267b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 45278fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 45288fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 45291da177e4SLinus Torvalds }; 45301da177e4SLinus Torvalds 45317a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 45327a8711c9SJ. Bruce Fields { 45337a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 45347a8711c9SJ. Bruce Fields return nfs_ok; 45357a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 45367a8711c9SJ. Bruce Fields return nfserr_replay_me; 45377a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 45387a8711c9SJ. Bruce Fields return nfs_ok; 45397a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 45407a8711c9SJ. Bruce Fields } 45411da177e4SLinus Torvalds 45424b24ca7dSJeff Layton static __be32 lookup_clientid(clientid_t *clid, 45434b24ca7dSJeff Layton struct nfsd4_compound_state *cstate, 4544b7342204SOlga Kornievskaia struct nfsd_net *nn, 4545b7342204SOlga Kornievskaia bool sessions) 45464b24ca7dSJeff Layton { 45474b24ca7dSJeff Layton struct nfs4_client *found; 45484b24ca7dSJeff Layton 45494b24ca7dSJeff Layton if (cstate->clp) { 45504b24ca7dSJeff Layton found = cstate->clp; 45514b24ca7dSJeff Layton if (!same_clid(&found->cl_clientid, clid)) 45524b24ca7dSJeff Layton return nfserr_stale_clientid; 45534b24ca7dSJeff Layton return nfs_ok; 45544b24ca7dSJeff Layton } 45554b24ca7dSJeff Layton 45564b24ca7dSJeff Layton if (STALE_CLIENTID(clid, nn)) 45574b24ca7dSJeff Layton return nfserr_stale_clientid; 45584b24ca7dSJeff Layton 45594b24ca7dSJeff Layton /* 45604b24ca7dSJeff Layton * For v4.1+ we get the client in the SEQUENCE op. If we don't have one 45614b24ca7dSJeff Layton * cached already then we know this is for is for v4.0 and "sessions" 45624b24ca7dSJeff Layton * will be false. 45634b24ca7dSJeff Layton */ 45644b24ca7dSJeff Layton WARN_ON_ONCE(cstate->session); 45653e339f96STrond Myklebust spin_lock(&nn->client_lock); 4566b7342204SOlga Kornievskaia found = find_confirmed_client(clid, sessions, nn); 45673e339f96STrond Myklebust if (!found) { 45683e339f96STrond Myklebust spin_unlock(&nn->client_lock); 45694b24ca7dSJeff Layton return nfserr_expired; 45703e339f96STrond Myklebust } 457114ed14ccSJ. Bruce Fields atomic_inc(&found->cl_rpc_users); 45723e339f96STrond Myklebust spin_unlock(&nn->client_lock); 45734b24ca7dSJeff Layton 45744b24ca7dSJeff Layton /* Cache the nfs4_client in cstate! */ 45754b24ca7dSJeff Layton cstate->clp = found; 45764b24ca7dSJeff Layton return nfs_ok; 45774b24ca7dSJeff Layton } 45784b24ca7dSJeff Layton 4579b37ad28bSAl Viro __be32 45806668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 45813320fef1SStanislav Kinsbursky struct nfsd4_open *open, struct nfsd_net *nn) 45821da177e4SLinus Torvalds { 45831da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 45841da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 45851da177e4SLinus Torvalds unsigned int strhashval; 4586fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 45874cdc951bSJ. Bruce Fields __be32 status; 45881da177e4SLinus Torvalds 45892c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 45901da177e4SLinus Torvalds return nfserr_stale_clientid; 459132513b40SJ. Bruce Fields /* 459232513b40SJ. Bruce Fields * In case we need it later, after we've already created the 459332513b40SJ. Bruce Fields * file and don't want to risk a further failure: 459432513b40SJ. Bruce Fields */ 459532513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 459632513b40SJ. Bruce Fields if (open->op_file == NULL) 459732513b40SJ. Bruce Fields return nfserr_jukebox; 45981da177e4SLinus Torvalds 4599b7342204SOlga Kornievskaia status = lookup_clientid(clientid, cstate, nn, false); 460013d6f66bSTrond Myklebust if (status) 460113d6f66bSTrond Myklebust return status; 460213d6f66bSTrond Myklebust clp = cstate->clp; 46032d91e895STrond Myklebust 4604d4f0489fSTrond Myklebust strhashval = ownerstr_hashval(&open->op_owner); 4605d4f0489fSTrond Myklebust oo = find_openstateowner_str(strhashval, open, clp); 46062d91e895STrond Myklebust open->op_openowner = oo; 46072d91e895STrond Myklebust if (!oo) { 4608bcf130f9SJ. Bruce Fields goto new_owner; 46090f442aa2SJ. Bruce Fields } 4610dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 46110f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 4612fe0750e5SJ. Bruce Fields release_openowner(oo); 4613fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 4614bcf130f9SJ. Bruce Fields goto new_owner; 46150f442aa2SJ. Bruce Fields } 46164cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 46174cdc951bSJ. Bruce Fields if (status) 46184cdc951bSJ. Bruce Fields return status; 46194cdc951bSJ. Bruce Fields goto alloc_stateid; 4620bcf130f9SJ. Bruce Fields new_owner: 462113d6f66bSTrond Myklebust oo = alloc_init_open_stateowner(strhashval, open, cstate); 4622fe0750e5SJ. Bruce Fields if (oo == NULL) 46233e772463SJ. Bruce Fields return nfserr_jukebox; 4624fe0750e5SJ. Bruce Fields open->op_openowner = oo; 46254cdc951bSJ. Bruce Fields alloc_stateid: 4626b49e084dSJeff Layton open->op_stp = nfs4_alloc_open_stateid(clp); 46274cdc951bSJ. Bruce Fields if (!open->op_stp) 46284cdc951bSJ. Bruce Fields return nfserr_jukebox; 46298287f009SSachin Bhamare 46308287f009SSachin Bhamare if (nfsd4_has_session(cstate) && 46318287f009SSachin Bhamare (cstate->current_fh.fh_export->ex_flags & NFSEXP_PNFS)) { 46328287f009SSachin Bhamare open->op_odstate = alloc_clnt_odstate(clp); 46338287f009SSachin Bhamare if (!open->op_odstate) 46348287f009SSachin Bhamare return nfserr_jukebox; 46358287f009SSachin Bhamare } 46368287f009SSachin Bhamare 46370f442aa2SJ. Bruce Fields return nfs_ok; 46381da177e4SLinus Torvalds } 46391da177e4SLinus Torvalds 4640b37ad28bSAl Viro static inline __be32 46414a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 46424a6e43e6SNeilBrown { 46434a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 46444a6e43e6SNeilBrown return nfserr_openmode; 46454a6e43e6SNeilBrown else 46464a6e43e6SNeilBrown return nfs_ok; 46474a6e43e6SNeilBrown } 46484a6e43e6SNeilBrown 4649c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 465024a0111eSJ. Bruce Fields { 465124a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 465224a0111eSJ. Bruce Fields } 465324a0111eSJ. Bruce Fields 465438c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 4655f459e453SJ. Bruce Fields { 4656f459e453SJ. Bruce Fields struct nfs4_stid *ret; 4657f459e453SJ. Bruce Fields 465895da1b3aSAndrew Elble ret = find_stateid_by_type(cl, s, 465995da1b3aSAndrew Elble NFS4_DELEG_STID|NFS4_REVOKED_DELEG_STID); 4660f459e453SJ. Bruce Fields if (!ret) 4661f459e453SJ. Bruce Fields return NULL; 4662f459e453SJ. Bruce Fields return delegstateid(ret); 4663f459e453SJ. Bruce Fields } 4664f459e453SJ. Bruce Fields 46658b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 46668b289b2cSJ. Bruce Fields { 46678b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 46688b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 46698b289b2cSJ. Bruce Fields } 46708b289b2cSJ. Bruce Fields 4671b37ad28bSAl Viro static __be32 467241d22663SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, 4673567d9829SNeilBrown struct nfs4_delegation **dp) 4674567d9829SNeilBrown { 4675567d9829SNeilBrown int flags; 4676b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 4677dcd94cc2STrond Myklebust struct nfs4_delegation *deleg; 4678567d9829SNeilBrown 4679dcd94cc2STrond Myklebust deleg = find_deleg_stateid(cl, &open->op_delegate_stateid); 4680dcd94cc2STrond Myklebust if (deleg == NULL) 4681c44c5eebSNeilBrown goto out; 468295da1b3aSAndrew Elble if (deleg->dl_stid.sc_type == NFS4_REVOKED_DELEG_STID) { 468395da1b3aSAndrew Elble nfs4_put_stid(&deleg->dl_stid); 468495da1b3aSAndrew Elble if (cl->cl_minorversion) 468595da1b3aSAndrew Elble status = nfserr_deleg_revoked; 468695da1b3aSAndrew Elble goto out; 468795da1b3aSAndrew Elble } 468824a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 4689dcd94cc2STrond Myklebust status = nfs4_check_delegmode(deleg, flags); 4690dcd94cc2STrond Myklebust if (status) { 4691dcd94cc2STrond Myklebust nfs4_put_stid(&deleg->dl_stid); 4692dcd94cc2STrond Myklebust goto out; 4693dcd94cc2STrond Myklebust } 4694dcd94cc2STrond Myklebust *dp = deleg; 4695c44c5eebSNeilBrown out: 46968b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 4697c44c5eebSNeilBrown return nfs_ok; 4698c44c5eebSNeilBrown if (status) 4699c44c5eebSNeilBrown return status; 4700dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 4701c44c5eebSNeilBrown return nfs_ok; 4702567d9829SNeilBrown } 4703567d9829SNeilBrown 470421fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 470521fb4016SJ. Bruce Fields { 470621fb4016SJ. Bruce Fields int flags = 0; 470721fb4016SJ. Bruce Fields 470821fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 470921fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 471021fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 471121fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 471221fb4016SJ. Bruce Fields return flags; 471321fb4016SJ. Bruce Fields } 471421fb4016SJ. Bruce Fields 4715b37ad28bSAl Viro static inline __be32 47161da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 47171da177e4SLinus Torvalds struct nfsd4_open *open) 47181da177e4SLinus Torvalds { 47191da177e4SLinus Torvalds struct iattr iattr = { 47201da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 47211da177e4SLinus Torvalds .ia_size = 0, 47221da177e4SLinus Torvalds }; 47231da177e4SLinus Torvalds if (!open->op_truncate) 47241da177e4SLinus Torvalds return 0; 47251da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 47269246585aSAl Viro return nfserr_inval; 47272a1aa489SArnd Bergmann return nfsd_setattr(rqstp, fh, &iattr, 0, (time64_t)0); 47281da177e4SLinus Torvalds } 47291da177e4SLinus Torvalds 47307e6a72e5SChristoph Hellwig static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 47316eb3a1d0SJeff Layton struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, 47326eb3a1d0SJeff Layton struct nfsd4_open *open) 47337e6a72e5SChristoph Hellwig { 4734fd4f83fdSJeff Layton struct nfsd_file *nf = NULL; 47357e6a72e5SChristoph Hellwig __be32 status; 47367e6a72e5SChristoph Hellwig int oflag = nfs4_access_to_omode(open->op_share_access); 47377e6a72e5SChristoph Hellwig int access = nfs4_access_to_access(open->op_share_access); 4738baeb4ff0SJeff Layton unsigned char old_access_bmap, old_deny_bmap; 47397e6a72e5SChristoph Hellwig 4740de18643dSTrond Myklebust spin_lock(&fp->fi_lock); 4741baeb4ff0SJeff Layton 4742baeb4ff0SJeff Layton /* 4743baeb4ff0SJeff Layton * Are we trying to set a deny mode that would conflict with 4744baeb4ff0SJeff Layton * current access? 4745baeb4ff0SJeff Layton */ 4746baeb4ff0SJeff Layton status = nfs4_file_check_deny(fp, open->op_share_deny); 4747baeb4ff0SJeff Layton if (status != nfs_ok) { 4748baeb4ff0SJeff Layton spin_unlock(&fp->fi_lock); 4749baeb4ff0SJeff Layton goto out; 4750baeb4ff0SJeff Layton } 4751baeb4ff0SJeff Layton 4752baeb4ff0SJeff Layton /* set access to the file */ 4753baeb4ff0SJeff Layton status = nfs4_file_get_access(fp, open->op_share_access); 4754baeb4ff0SJeff Layton if (status != nfs_ok) { 4755baeb4ff0SJeff Layton spin_unlock(&fp->fi_lock); 4756baeb4ff0SJeff Layton goto out; 4757baeb4ff0SJeff Layton } 4758baeb4ff0SJeff Layton 4759baeb4ff0SJeff Layton /* Set access bits in stateid */ 4760baeb4ff0SJeff Layton old_access_bmap = stp->st_access_bmap; 4761baeb4ff0SJeff Layton set_access(open->op_share_access, stp); 4762baeb4ff0SJeff Layton 4763baeb4ff0SJeff Layton /* Set new deny mask */ 4764baeb4ff0SJeff Layton old_deny_bmap = stp->st_deny_bmap; 4765baeb4ff0SJeff Layton set_deny(open->op_share_deny, stp); 4766baeb4ff0SJeff Layton fp->fi_share_deny |= (open->op_share_deny & NFS4_SHARE_DENY_BOTH); 4767baeb4ff0SJeff Layton 47687e6a72e5SChristoph Hellwig if (!fp->fi_fds[oflag]) { 4769de18643dSTrond Myklebust spin_unlock(&fp->fi_lock); 4770fd4f83fdSJeff Layton status = nfsd_file_acquire(rqstp, cur_fh, access, &nf); 47717e6a72e5SChristoph Hellwig if (status) 4772baeb4ff0SJeff Layton goto out_put_access; 4773de18643dSTrond Myklebust spin_lock(&fp->fi_lock); 4774de18643dSTrond Myklebust if (!fp->fi_fds[oflag]) { 4775fd4f83fdSJeff Layton fp->fi_fds[oflag] = nf; 4776fd4f83fdSJeff Layton nf = NULL; 4777de18643dSTrond Myklebust } 47787e6a72e5SChristoph Hellwig } 4779de18643dSTrond Myklebust spin_unlock(&fp->fi_lock); 4780fd4f83fdSJeff Layton if (nf) 4781fd4f83fdSJeff Layton nfsd_file_put(nf); 47827e6a72e5SChristoph Hellwig 47837e6a72e5SChristoph Hellwig status = nfsd4_truncate(rqstp, cur_fh, open); 47847e6a72e5SChristoph Hellwig if (status) 47857e6a72e5SChristoph Hellwig goto out_put_access; 47867e6a72e5SChristoph Hellwig out: 47877e6a72e5SChristoph Hellwig return status; 4788baeb4ff0SJeff Layton out_put_access: 4789baeb4ff0SJeff Layton stp->st_access_bmap = old_access_bmap; 4790baeb4ff0SJeff Layton nfs4_file_put_access(fp, open->op_share_access); 4791baeb4ff0SJeff Layton reset_union_bmap_deny(bmap_to_share_mode(old_deny_bmap), stp); 4792baeb4ff0SJeff Layton goto out; 47937e6a72e5SChristoph Hellwig } 47947e6a72e5SChristoph Hellwig 4795b37ad28bSAl Viro static __be32 4796dcef0413SJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) 47971da177e4SLinus Torvalds { 4798b37ad28bSAl Viro __be32 status; 47996ac75368SArnd Bergmann unsigned char old_deny_bmap = stp->st_deny_bmap; 48001da177e4SLinus Torvalds 48016eb3a1d0SJeff Layton if (!test_access(open->op_share_access, stp)) 4802baeb4ff0SJeff Layton return nfs4_get_vfs_file(rqstp, fp, cur_fh, stp, open); 48037e6a72e5SChristoph Hellwig 4804baeb4ff0SJeff Layton /* test and set deny mode */ 4805baeb4ff0SJeff Layton spin_lock(&fp->fi_lock); 4806baeb4ff0SJeff Layton status = nfs4_file_check_deny(fp, open->op_share_deny); 4807baeb4ff0SJeff Layton if (status == nfs_ok) { 4808baeb4ff0SJeff Layton set_deny(open->op_share_deny, stp); 4809baeb4ff0SJeff Layton fp->fi_share_deny |= 4810baeb4ff0SJeff Layton (open->op_share_deny & NFS4_SHARE_DENY_BOTH); 48111da177e4SLinus Torvalds } 4812baeb4ff0SJeff Layton spin_unlock(&fp->fi_lock); 48131da177e4SLinus Torvalds 4814baeb4ff0SJeff Layton if (status != nfs_ok) 4815baeb4ff0SJeff Layton return status; 4816baeb4ff0SJeff Layton 4817baeb4ff0SJeff Layton status = nfsd4_truncate(rqstp, cur_fh, open); 4818baeb4ff0SJeff Layton if (status != nfs_ok) 4819baeb4ff0SJeff Layton reset_union_bmap_deny(old_deny_bmap, stp); 4820baeb4ff0SJeff Layton return status; 4821baeb4ff0SJeff Layton } 48221da177e4SLinus Torvalds 482314a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 482414a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 482514a24e99SJ. Bruce Fields { 482614a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 482714a24e99SJ. Bruce Fields return true; 482814a24e99SJ. Bruce Fields /* 482914a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 483014a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 483114a24e99SJ. Bruce Fields * until we hear otherwise: 483214a24e99SJ. Bruce Fields */ 483314a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 483414a24e99SJ. Bruce Fields } 483514a24e99SJ. Bruce Fields 4836653e514eSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, 4837653e514eSJ. Bruce Fields int flag) 483822d38c4cSJ. Bruce Fields { 483922d38c4cSJ. Bruce Fields struct file_lock *fl; 484022d38c4cSJ. Bruce Fields 484122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 484222d38c4cSJ. Bruce Fields if (!fl) 484322d38c4cSJ. Bruce Fields return NULL; 484422d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 4845617588d5SJ. Bruce Fields fl->fl_flags = FL_DELEG; 484622d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 484722d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 4848653e514eSJ. Bruce Fields fl->fl_owner = (fl_owner_t)dp; 484922d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 4850eb82dd39SJeff Layton fl->fl_file = dp->dl_stid.sc_file->fi_deleg_file->nf_file; 485122d38c4cSJ. Bruce Fields return fl; 485222d38c4cSJ. Bruce Fields } 485322d38c4cSJ. Bruce Fields 48540b26693cSJeff Layton static struct nfs4_delegation * 48550b26693cSJeff Layton nfs4_set_delegation(struct nfs4_client *clp, struct svc_fh *fh, 48568287f009SSachin Bhamare struct nfs4_file *fp, struct nfs4_clnt_odstate *odstate) 4857acfdf5c3SJ. Bruce Fields { 485868b18f52SJ. Bruce Fields int status = 0; 48590b26693cSJeff Layton struct nfs4_delegation *dp; 4860eb82dd39SJeff Layton struct nfsd_file *nf; 4861353601e7SJ. Bruce Fields struct file_lock *fl; 4862417c6629SJeff Layton 4863353601e7SJ. Bruce Fields /* 4864353601e7SJ. Bruce Fields * The fi_had_conflict and nfs_get_existing_delegation checks 4865353601e7SJ. Bruce Fields * here are just optimizations; we'll need to recheck them at 4866353601e7SJ. Bruce Fields * the end: 4867353601e7SJ. Bruce Fields */ 4868bf7bd3e9SJ. Bruce Fields if (fp->fi_had_conflict) 48690b26693cSJeff Layton return ERR_PTR(-EAGAIN); 48700b26693cSJeff Layton 4871eb82dd39SJeff Layton nf = find_readable_file(fp); 4872eb82dd39SJeff Layton if (!nf) { 4873353601e7SJ. Bruce Fields /* We should always have a readable file here */ 4874353601e7SJ. Bruce Fields WARN_ON_ONCE(1); 4875353601e7SJ. Bruce Fields return ERR_PTR(-EBADF); 4876353601e7SJ. Bruce Fields } 487734ed9872SAndrew Elble spin_lock(&state_lock); 487834ed9872SAndrew Elble spin_lock(&fp->fi_lock); 487968b18f52SJ. Bruce Fields if (nfs4_delegation_exists(clp, fp)) 488068b18f52SJ. Bruce Fields status = -EAGAIN; 4881353601e7SJ. Bruce Fields else if (!fp->fi_deleg_file) { 4882eb82dd39SJeff Layton fp->fi_deleg_file = nf; 4883353601e7SJ. Bruce Fields /* increment early to prevent fi_deleg_file from being 4884353601e7SJ. Bruce Fields * cleared */ 4885353601e7SJ. Bruce Fields fp->fi_delegees = 1; 4886eb82dd39SJeff Layton nf = NULL; 4887353601e7SJ. Bruce Fields } else 4888353601e7SJ. Bruce Fields fp->fi_delegees++; 4889353601e7SJ. Bruce Fields spin_unlock(&fp->fi_lock); 4890353601e7SJ. Bruce Fields spin_unlock(&state_lock); 4891eb82dd39SJeff Layton if (nf) 4892eb82dd39SJeff Layton nfsd_file_put(nf); 4893353601e7SJ. Bruce Fields if (status) 4894353601e7SJ. Bruce Fields return ERR_PTR(status); 4895353601e7SJ. Bruce Fields 4896353601e7SJ. Bruce Fields status = -ENOMEM; 4897353601e7SJ. Bruce Fields dp = alloc_init_deleg(clp, fp, fh, odstate); 4898353601e7SJ. Bruce Fields if (!dp) 4899353601e7SJ. Bruce Fields goto out_delegees; 4900353601e7SJ. Bruce Fields 4901353601e7SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); 4902353601e7SJ. Bruce Fields if (!fl) 4903bd8d7250SAndrew Elble goto out_clnt_odstate; 4904353601e7SJ. Bruce Fields 4905eb82dd39SJeff Layton status = vfs_setlease(fp->fi_deleg_file->nf_file, fl->fl_type, &fl, NULL); 4906353601e7SJ. Bruce Fields if (fl) 4907353601e7SJ. Bruce Fields locks_free_lock(fl); 4908353601e7SJ. Bruce Fields if (status) 4909353601e7SJ. Bruce Fields goto out_clnt_odstate; 4910353601e7SJ. Bruce Fields 4911353601e7SJ. Bruce Fields spin_lock(&state_lock); 4912353601e7SJ. Bruce Fields spin_lock(&fp->fi_lock); 4913353601e7SJ. Bruce Fields if (fp->fi_had_conflict) 4914353601e7SJ. Bruce Fields status = -EAGAIN; 4915353601e7SJ. Bruce Fields else 4916353601e7SJ. Bruce Fields status = hash_delegation_locked(dp, fp); 491734ed9872SAndrew Elble spin_unlock(&fp->fi_lock); 491834ed9872SAndrew Elble spin_unlock(&state_lock); 491934ed9872SAndrew Elble 492034ed9872SAndrew Elble if (status) 4921692ad280SAndrew Elble goto out_unlock; 4922692ad280SAndrew Elble 49230b26693cSJeff Layton return dp; 4924692ad280SAndrew Elble out_unlock: 4925eb82dd39SJeff Layton vfs_setlease(fp->fi_deleg_file->nf_file, F_UNLCK, NULL, (void **)&dp); 4926353601e7SJ. Bruce Fields out_clnt_odstate: 4927353601e7SJ. Bruce Fields put_clnt_odstate(dp->dl_clnt_odstate); 4928353601e7SJ. Bruce Fields nfs4_put_stid(&dp->dl_stid); 4929353601e7SJ. Bruce Fields out_delegees: 4930353601e7SJ. Bruce Fields put_deleg_file(fp); 4931353601e7SJ. Bruce Fields return ERR_PTR(status); 4932edab9782SJ. Bruce Fields } 4933edab9782SJ. Bruce Fields 49344aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 49354aa8913cSBenny Halevy { 49364aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 49374aa8913cSBenny Halevy if (status == -EAGAIN) 49384aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 49394aa8913cSBenny Halevy else { 49404aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 49414aa8913cSBenny Halevy switch (open->op_deleg_want) { 49424aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 49434aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 49444aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 49454aa8913cSBenny Halevy break; 49464aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 49474aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 49484aa8913cSBenny Halevy break; 49494aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 4950063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 49514aa8913cSBenny Halevy } 49524aa8913cSBenny Halevy } 49534aa8913cSBenny Halevy } 49544aa8913cSBenny Halevy 49551da177e4SLinus Torvalds /* 49561da177e4SLinus Torvalds * Attempt to hand out a delegation. 495799c41515SJ. Bruce Fields * 495899c41515SJ. Bruce Fields * Note we don't support write delegations, and won't until the vfs has 495999c41515SJ. Bruce Fields * proper support for them. 49601da177e4SLinus Torvalds */ 49611da177e4SLinus Torvalds static void 49624cf59221SJeff Layton nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, 49634cf59221SJeff Layton struct nfs4_ol_stateid *stp) 49641da177e4SLinus Torvalds { 49651da177e4SLinus Torvalds struct nfs4_delegation *dp; 49664cf59221SJeff Layton struct nfs4_openowner *oo = openowner(stp->st_stateowner); 49674cf59221SJeff Layton struct nfs4_client *clp = stp->st_stid.sc_client; 496814a24e99SJ. Bruce Fields int cb_up; 496999c41515SJ. Bruce Fields int status = 0; 49701da177e4SLinus Torvalds 4971fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 49727b190fecSNeilBrown open->op_recall = 0; 49737b190fecSNeilBrown switch (open->op_claim_type) { 49747b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 49752bf23875SJ. Bruce Fields if (!cb_up) 49767b190fecSNeilBrown open->op_recall = 1; 497799c41515SJ. Bruce Fields if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) 497899c41515SJ. Bruce Fields goto out_no_deleg; 49797b190fecSNeilBrown break; 49807b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 4981ed47b062SMing Chen case NFS4_OPEN_CLAIM_FH: 498299c41515SJ. Bruce Fields /* 498399c41515SJ. Bruce Fields * Let's not give out any delegations till everyone's 4984c87fb4a3SJ. Bruce Fields * had the chance to reclaim theirs, *and* until 4985c87fb4a3SJ. Bruce Fields * NLM locks have all been reclaimed: 498699c41515SJ. Bruce Fields */ 49874cf59221SJeff Layton if (locks_in_grace(clp->net)) 498899c41515SJ. Bruce Fields goto out_no_deleg; 4989dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 499099c41515SJ. Bruce Fields goto out_no_deleg; 49919a0590aeSSteve Dickson /* 49929a0590aeSSteve Dickson * Also, if the file was opened for write or 49939a0590aeSSteve Dickson * create, there's a good chance the client's 49949a0590aeSSteve Dickson * about to write to it, resulting in an 49959a0590aeSSteve Dickson * immediate recall (since we don't support 49969a0590aeSSteve Dickson * write delegations): 49979a0590aeSSteve Dickson */ 49981da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 499999c41515SJ. Bruce Fields goto out_no_deleg; 500099c41515SJ. Bruce Fields if (open->op_create == NFS4_OPEN_CREATE) 500199c41515SJ. Bruce Fields goto out_no_deleg; 50027b190fecSNeilBrown break; 50037b190fecSNeilBrown default: 500499c41515SJ. Bruce Fields goto out_no_deleg; 50057b190fecSNeilBrown } 50068287f009SSachin Bhamare dp = nfs4_set_delegation(clp, fh, stp->st_stid.sc_file, stp->st_clnt_odstate); 50070b26693cSJeff Layton if (IS_ERR(dp)) 5008dd239cc0SJ. Bruce Fields goto out_no_deleg; 50091da177e4SLinus Torvalds 5010d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 50111da177e4SLinus Torvalds 5012dd5e3fbcSChuck Lever trace_nfsd_deleg_open(&dp->dl_stid.sc_stateid); 501399c41515SJ. Bruce Fields open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; 501467cb1279STrond Myklebust nfs4_put_stid(&dp->dl_stid); 5015dd239cc0SJ. Bruce Fields return; 5016dd239cc0SJ. Bruce Fields out_no_deleg: 501799c41515SJ. Bruce Fields open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; 50187b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 5019d08d32e6SJ. Bruce Fields open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { 50201da177e4SLinus Torvalds dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 5021d08d32e6SJ. Bruce Fields open->op_recall = 1; 5022d08d32e6SJ. Bruce Fields } 5023dd239cc0SJ. Bruce Fields 5024dd239cc0SJ. Bruce Fields /* 4.1 client asking for a delegation? */ 5025dd239cc0SJ. Bruce Fields if (open->op_deleg_want) 5026dd239cc0SJ. Bruce Fields nfsd4_open_deleg_none_ext(open, status); 5027dd239cc0SJ. Bruce Fields return; 50281da177e4SLinus Torvalds } 50291da177e4SLinus Torvalds 5030e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 5031e27f49c3SBenny Halevy struct nfs4_delegation *dp) 5032e27f49c3SBenny Halevy { 5033e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 5034e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 5035e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 5036e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 5037e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 5038e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 5039e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 5040e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 5041e27f49c3SBenny Halevy } 5042e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 5043e27f49c3SBenny Halevy * it already has, therefore we don't return 5044e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 5045e27f49c3SBenny Halevy */ 5046e27f49c3SBenny Halevy } 5047e27f49c3SBenny Halevy 5048b37ad28bSAl Viro __be32 50491da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 50501da177e4SLinus Torvalds { 50516668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 505238c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 50531da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 5054dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 5055567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 5056b37ad28bSAl Viro __be32 status; 5057d8a1a000STrond Myklebust bool new_stp = false; 50581da177e4SLinus Torvalds 50591da177e4SLinus Torvalds /* 50601da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 50611da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 50621da177e4SLinus Torvalds * If not found, create the nfs4_file struct 50631da177e4SLinus Torvalds */ 5064f9c00c3aSJeff Layton fp = find_or_add_file(open->op_file, ¤t_fh->fh_handle); 5065950e0118STrond Myklebust if (fp != open->op_file) { 506641d22663SJ. Bruce Fields status = nfs4_check_deleg(cl, open, &dp); 5067c44c5eebSNeilBrown if (status) 5068c44c5eebSNeilBrown goto out; 506915ca08d3STrond Myklebust stp = nfsd4_find_and_lock_existing_open(fp, open); 50701da177e4SLinus Torvalds } else { 5071950e0118STrond Myklebust open->op_file = NULL; 5072c44c5eebSNeilBrown status = nfserr_bad_stateid; 50738b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 5074c44c5eebSNeilBrown goto out; 50751da177e4SLinus Torvalds } 50761da177e4SLinus Torvalds 5077d8a1a000STrond Myklebust if (!stp) { 5078d8a1a000STrond Myklebust stp = init_open_stateid(fp, open); 5079d8a1a000STrond Myklebust if (!open->op_stp) 5080d8a1a000STrond Myklebust new_stp = true; 5081d8a1a000STrond Myklebust } 5082d8a1a000STrond Myklebust 50831da177e4SLinus Torvalds /* 50841da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 50851da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 5086d8a1a000STrond Myklebust * 5087d8a1a000STrond Myklebust * stp is already locked. 50881da177e4SLinus Torvalds */ 5089d8a1a000STrond Myklebust if (!new_stp) { 50901da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 5091f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 509235a92fe8SJeff Layton if (status) { 5093feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 50941da177e4SLinus Torvalds goto out; 509535a92fe8SJeff Layton } 50961da177e4SLinus Torvalds } else { 50976eb3a1d0SJeff Layton status = nfs4_get_vfs_file(rqstp, fp, current_fh, stp, open); 50986eb3a1d0SJeff Layton if (status) { 5099d8a1a000STrond Myklebust stp->st_stid.sc_type = NFS4_CLOSED_STID; 51006eb3a1d0SJeff Layton release_open_stateid(stp); 5101d8a1a000STrond Myklebust mutex_unlock(&stp->st_mutex); 51026eb3a1d0SJeff Layton goto out; 51036eb3a1d0SJeff Layton } 51048287f009SSachin Bhamare 51058287f009SSachin Bhamare stp->st_clnt_odstate = find_or_hash_clnt_odstate(fp, 51068287f009SSachin Bhamare open->op_odstate); 51078287f009SSachin Bhamare if (stp->st_clnt_odstate == open->op_odstate) 51088287f009SSachin Bhamare open->op_odstate = NULL; 51091da177e4SLinus Torvalds } 5110d8a1a000STrond Myklebust 51119767feb2SJeff Layton nfs4_inc_and_copy_stateid(&open->op_stateid, &stp->st_stid); 5112feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 51131da177e4SLinus Torvalds 5114d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 5115d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 5116d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 5117d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 5118d24433cdSBenny Halevy goto nodeleg; 5119d24433cdSBenny Halevy } 5120d24433cdSBenny Halevy } 5121d24433cdSBenny Halevy 51221da177e4SLinus Torvalds /* 51231da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 51241da177e4SLinus Torvalds * OPEN succeeds even if we fail. 51251da177e4SLinus Torvalds */ 51264cf59221SJeff Layton nfs4_open_delegation(current_fh, open, stp); 5127d24433cdSBenny Halevy nodeleg: 51281da177e4SLinus Torvalds status = nfs_ok; 5129dd5e3fbcSChuck Lever trace_nfsd_deleg_none(&stp->st_stid.sc_stateid); 51301da177e4SLinus Torvalds out: 5131d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 5132d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 5133e27f49c3SBenny Halevy open->op_deleg_want) 5134e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 5135d24433cdSBenny Halevy 513613cd2184SNeilBrown if (fp) 513713cd2184SNeilBrown put_nfs4_file(fp); 513837515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 513987186022SKinglong Mee open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 51401da177e4SLinus Torvalds /* 51411da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 51421da177e4SLinus Torvalds */ 51431da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 514419e4c347SJeff Layton if (nfsd4_has_session(&resp->cstate)) 514519e4c347SJeff Layton open->op_rflags |= NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK; 514619e4c347SJeff Layton else if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED)) 51471da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 514819e4c347SJeff Layton 5149dcd94cc2STrond Myklebust if (dp) 5150dcd94cc2STrond Myklebust nfs4_put_stid(&dp->dl_stid); 5151d6f2bc5dSTrond Myklebust if (stp) 5152d6f2bc5dSTrond Myklebust nfs4_put_stid(&stp->st_stid); 51531da177e4SLinus Torvalds 51541da177e4SLinus Torvalds return status; 51551da177e4SLinus Torvalds } 51561da177e4SLinus Torvalds 515758fb12e6SJeff Layton void nfsd4_cleanup_open_state(struct nfsd4_compound_state *cstate, 515842297899SJeff Layton struct nfsd4_open *open) 5159d29b20cdSJ. Bruce Fields { 5160d29b20cdSJ. Bruce Fields if (open->op_openowner) { 5161d3134b10SJeff Layton struct nfs4_stateowner *so = &open->op_openowner->oo_owner; 5162d29b20cdSJ. Bruce Fields 5163d3134b10SJeff Layton nfsd4_cstate_assign_replay(cstate, so); 5164d3134b10SJeff Layton nfs4_put_stateowner(so); 5165d29b20cdSJ. Bruce Fields } 516632513b40SJ. Bruce Fields if (open->op_file) 51675b095e99SJeff Layton kmem_cache_free(file_slab, open->op_file); 51684cdc951bSJ. Bruce Fields if (open->op_stp) 51696011695dSTrond Myklebust nfs4_put_stid(&open->op_stp->st_stid); 51708287f009SSachin Bhamare if (open->op_odstate) 51718287f009SSachin Bhamare kmem_cache_free(odstate_slab, open->op_odstate); 5172d29b20cdSJ. Bruce Fields } 5173d29b20cdSJ. Bruce Fields 5174b37ad28bSAl Viro __be32 5175b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 5176eb69853dSChristoph Hellwig union nfsd4_op_u *u) 51771da177e4SLinus Torvalds { 5178eb69853dSChristoph Hellwig clientid_t *clid = &u->renew; 51791da177e4SLinus Torvalds struct nfs4_client *clp; 5180b37ad28bSAl Viro __be32 status; 51817f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 51821da177e4SLinus Torvalds 5183dd5e3fbcSChuck Lever trace_nfsd_clid_renew(clid); 5184b7342204SOlga Kornievskaia status = lookup_clientid(clid, cstate, nn, false); 51859b2ef62bSJ. Bruce Fields if (status) 51861da177e4SLinus Torvalds goto out; 51874b24ca7dSJeff Layton clp = cstate->clp; 51881da177e4SLinus Torvalds status = nfserr_cb_path_down; 5189ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 519077a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 51911da177e4SLinus Torvalds goto out; 51921da177e4SLinus Torvalds status = nfs_ok; 51931da177e4SLinus Torvalds out: 51941da177e4SLinus Torvalds return status; 51951da177e4SLinus Torvalds } 51961da177e4SLinus Torvalds 51977f5ef2e9SJeff Layton void 519812760c66SStanislav Kinsbursky nfsd4_end_grace(struct nfsd_net *nn) 5199a76b4319SNeilBrown { 520033dcc481SJeff Layton /* do nothing if grace period already ended */ 5201a51c84edSStanislav Kinsbursky if (nn->grace_ended) 520233dcc481SJeff Layton return; 520333dcc481SJeff Layton 5204dd5e3fbcSChuck Lever trace_nfsd_grace_complete(nn); 5205a51c84edSStanislav Kinsbursky nn->grace_ended = true; 520670b28235SJ. Bruce Fields /* 520770b28235SJ. Bruce Fields * If the server goes down again right now, an NFSv4 520870b28235SJ. Bruce Fields * client will still be allowed to reclaim after it comes back up, 520970b28235SJ. Bruce Fields * even if it hasn't yet had a chance to reclaim state this time. 521070b28235SJ. Bruce Fields * 521170b28235SJ. Bruce Fields */ 5212919b8049SJeff Layton nfsd4_record_grace_done(nn); 521370b28235SJ. Bruce Fields /* 521470b28235SJ. Bruce Fields * At this point, NFSv4 clients can still reclaim. But if the 521570b28235SJ. Bruce Fields * server crashes, any that have not yet reclaimed will be out 521670b28235SJ. Bruce Fields * of luck on the next boot. 521770b28235SJ. Bruce Fields * 521870b28235SJ. Bruce Fields * (NFSv4.1+ clients are considered to have reclaimed once they 521970b28235SJ. Bruce Fields * call RECLAIM_COMPLETE. NFSv4.0 clients are considered to 522070b28235SJ. Bruce Fields * have reclaimed after their first OPEN.) 522170b28235SJ. Bruce Fields */ 52225e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 522370b28235SJ. Bruce Fields /* 522470b28235SJ. Bruce Fields * At this point, and once lockd and/or any other containers 522570b28235SJ. Bruce Fields * exit their grace period, further reclaims will fail and 522670b28235SJ. Bruce Fields * regular locking can resume. 522770b28235SJ. Bruce Fields */ 5228a76b4319SNeilBrown } 5229a76b4319SNeilBrown 523003f318caSJ. Bruce Fields /* 523103f318caSJ. Bruce Fields * If we've waited a lease period but there are still clients trying to 523203f318caSJ. Bruce Fields * reclaim, wait a little longer to give them a chance to finish. 523303f318caSJ. Bruce Fields */ 523403f318caSJ. Bruce Fields static bool clients_still_reclaiming(struct nfsd_net *nn) 523503f318caSJ. Bruce Fields { 523620b7d86fSArnd Bergmann time64_t double_grace_period_end = nn->boot_time + 523720b7d86fSArnd Bergmann 2 * nn->nfsd4_lease; 523803f318caSJ. Bruce Fields 5239362063a5SScott Mayhew if (nn->track_reclaim_completes && 5240362063a5SScott Mayhew atomic_read(&nn->nr_reclaim_complete) == 5241362063a5SScott Mayhew nn->reclaim_str_hashtbl_size) 5242362063a5SScott Mayhew return false; 524303f318caSJ. Bruce Fields if (!nn->somebody_reclaimed) 524403f318caSJ. Bruce Fields return false; 524503f318caSJ. Bruce Fields nn->somebody_reclaimed = false; 524603f318caSJ. Bruce Fields /* 524703f318caSJ. Bruce Fields * If we've given them *two* lease times to reclaim, and they're 524803f318caSJ. Bruce Fields * still not done, give up: 524903f318caSJ. Bruce Fields */ 525020b7d86fSArnd Bergmann if (ktime_get_boottime_seconds() > double_grace_period_end) 525103f318caSJ. Bruce Fields return false; 525203f318caSJ. Bruce Fields return true; 525303f318caSJ. Bruce Fields } 525403f318caSJ. Bruce Fields 525520b7d86fSArnd Bergmann static time64_t 525609121281SStanislav Kinsbursky nfs4_laundromat(struct nfsd_net *nn) 52571da177e4SLinus Torvalds { 52581da177e4SLinus Torvalds struct nfs4_client *clp; 5259fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 52601da177e4SLinus Torvalds struct nfs4_delegation *dp; 5261217526e7SJeff Layton struct nfs4_ol_stateid *stp; 52627919d0a2SJeff Layton struct nfsd4_blocked_lock *nbl; 52631da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 526420b7d86fSArnd Bergmann time64_t cutoff = ktime_get_boottime_seconds() - nn->nfsd4_lease; 526520b7d86fSArnd Bergmann time64_t t, new_timeo = nn->nfsd4_lease; 5266624322f1SOlga Kornievskaia struct nfs4_cpntf_state *cps; 5267624322f1SOlga Kornievskaia copy_stateid_t *cps_t; 5268624322f1SOlga Kornievskaia int i; 52691da177e4SLinus Torvalds 527003f318caSJ. Bruce Fields if (clients_still_reclaiming(nn)) { 527103f318caSJ. Bruce Fields new_timeo = 0; 527203f318caSJ. Bruce Fields goto out; 527303f318caSJ. Bruce Fields } 527412760c66SStanislav Kinsbursky nfsd4_end_grace(nn); 527536acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 5276624322f1SOlga Kornievskaia 5277624322f1SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 5278624322f1SOlga Kornievskaia idr_for_each_entry(&nn->s2s_cp_stateids, cps_t, i) { 5279624322f1SOlga Kornievskaia cps = container_of(cps_t, struct nfs4_cpntf_state, cp_stateid); 5280624322f1SOlga Kornievskaia if (cps->cp_stateid.sc_type == NFS4_COPYNOTIFY_STID && 528120b7d86fSArnd Bergmann cps->cpntf_time > cutoff) 5282624322f1SOlga Kornievskaia _free_cpntf_state_locked(nn, cps); 5283624322f1SOlga Kornievskaia } 5284624322f1SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 5285624322f1SOlga Kornievskaia 5286c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 52875ed58bb2SStanislav Kinsbursky list_for_each_safe(pos, next, &nn->client_lru) { 52881da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 528920b7d86fSArnd Bergmann if (clp->cl_time > cutoff) { 52901da177e4SLinus Torvalds t = clp->cl_time - cutoff; 5291a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 52921da177e4SLinus Torvalds break; 52931da177e4SLinus Torvalds } 5294221a6876SJ. Bruce Fields if (mark_client_expired_locked(clp)) { 5295dd5e3fbcSChuck Lever trace_nfsd_clid_expired(&clp->cl_clientid); 5296d7682988SBenny Halevy continue; 5297d7682988SBenny Halevy } 52984864af97STrond Myklebust list_add(&clp->cl_lru, &reaplist); 529936acb66bSBenny Halevy } 5300c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 530136acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 530236acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 5303dd5e3fbcSChuck Lever trace_nfsd_clid_purged(&clp->cl_clientid); 53044864af97STrond Myklebust list_del_init(&clp->cl_lru); 53051da177e4SLinus Torvalds expire_client(clp); 53061da177e4SLinus Torvalds } 5307cdc97505SBenny Halevy spin_lock(&state_lock); 5308e8c69d17SJ. Bruce Fields list_for_each_safe(pos, next, &nn->del_recall_lru) { 53091da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 531020b7d86fSArnd Bergmann if (dp->dl_time > cutoff) { 5311a832e7aeSJeff Layton t = dp->dl_time - cutoff; 5312a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 53131da177e4SLinus Torvalds break; 53141da177e4SLinus Torvalds } 53153fcbbd24SJeff Layton WARN_ON(!unhash_delegation_locked(dp)); 531642690676SJeff Layton list_add(&dp->dl_recall_lru, &reaplist); 53171da177e4SLinus Torvalds } 5318cdc97505SBenny Halevy spin_unlock(&state_lock); 53192d4a532dSJeff Layton while (!list_empty(&reaplist)) { 53202d4a532dSJeff Layton dp = list_first_entry(&reaplist, struct nfs4_delegation, 53212d4a532dSJeff Layton dl_recall_lru); 53222d4a532dSJeff Layton list_del_init(&dp->dl_recall_lru); 53233bd64a5bSJ. Bruce Fields revoke_delegation(dp); 53241da177e4SLinus Torvalds } 5325217526e7SJeff Layton 5326217526e7SJeff Layton spin_lock(&nn->client_lock); 5327217526e7SJeff Layton while (!list_empty(&nn->close_lru)) { 5328217526e7SJeff Layton oo = list_first_entry(&nn->close_lru, struct nfs4_openowner, 5329217526e7SJeff Layton oo_close_lru); 533020b7d86fSArnd Bergmann if (oo->oo_time > cutoff) { 5331a832e7aeSJeff Layton t = oo->oo_time - cutoff; 5332a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 53331da177e4SLinus Torvalds break; 53341da177e4SLinus Torvalds } 5335217526e7SJeff Layton list_del_init(&oo->oo_close_lru); 5336217526e7SJeff Layton stp = oo->oo_last_closed_stid; 5337217526e7SJeff Layton oo->oo_last_closed_stid = NULL; 5338217526e7SJeff Layton spin_unlock(&nn->client_lock); 5339217526e7SJeff Layton nfs4_put_stid(&stp->st_stid); 5340217526e7SJeff Layton spin_lock(&nn->client_lock); 53411da177e4SLinus Torvalds } 5342217526e7SJeff Layton spin_unlock(&nn->client_lock); 5343217526e7SJeff Layton 53447919d0a2SJeff Layton /* 53457919d0a2SJeff Layton * It's possible for a client to try and acquire an already held lock 53467919d0a2SJeff Layton * that is being held for a long time, and then lose interest in it. 53477919d0a2SJeff Layton * So, we clean out any un-revisited request after a lease period 53487919d0a2SJeff Layton * under the assumption that the client is no longer interested. 53497919d0a2SJeff Layton * 53507919d0a2SJeff Layton * RFC5661, sec. 9.6 states that the client must not rely on getting 53517919d0a2SJeff Layton * notifications and must continue to poll for locks, even when the 53527919d0a2SJeff Layton * server supports them. Thus this shouldn't lead to clients blocking 53537919d0a2SJeff Layton * indefinitely once the lock does become free. 53547919d0a2SJeff Layton */ 53557919d0a2SJeff Layton BUG_ON(!list_empty(&reaplist)); 53560cc11a61SJeff Layton spin_lock(&nn->blocked_locks_lock); 53577919d0a2SJeff Layton while (!list_empty(&nn->blocked_locks_lru)) { 53587919d0a2SJeff Layton nbl = list_first_entry(&nn->blocked_locks_lru, 53597919d0a2SJeff Layton struct nfsd4_blocked_lock, nbl_lru); 536020b7d86fSArnd Bergmann if (nbl->nbl_time > cutoff) { 53617919d0a2SJeff Layton t = nbl->nbl_time - cutoff; 53627919d0a2SJeff Layton new_timeo = min(new_timeo, t); 53637919d0a2SJeff Layton break; 53647919d0a2SJeff Layton } 53657919d0a2SJeff Layton list_move(&nbl->nbl_lru, &reaplist); 53667919d0a2SJeff Layton list_del_init(&nbl->nbl_list); 53677919d0a2SJeff Layton } 53680cc11a61SJeff Layton spin_unlock(&nn->blocked_locks_lock); 53697919d0a2SJeff Layton 53707919d0a2SJeff Layton while (!list_empty(&reaplist)) { 537164ebe124SNaofumi Honda nbl = list_first_entry(&reaplist, 53727919d0a2SJeff Layton struct nfsd4_blocked_lock, nbl_lru); 53737919d0a2SJeff Layton list_del_init(&nbl->nbl_lru); 53747919d0a2SJeff Layton free_blocked_lock(nbl); 53757919d0a2SJeff Layton } 537603f318caSJ. Bruce Fields out: 537720b7d86fSArnd Bergmann new_timeo = max_t(time64_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); 5378a832e7aeSJeff Layton return new_timeo; 53791da177e4SLinus Torvalds } 53801da177e4SLinus Torvalds 5381a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 5382a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 5383a254b246SHarvey Harrison 5384a254b246SHarvey Harrison static void 538509121281SStanislav Kinsbursky laundromat_main(struct work_struct *laundry) 53861da177e4SLinus Torvalds { 538720b7d86fSArnd Bergmann time64_t t; 53882e55f3abSGeliang Tang struct delayed_work *dwork = to_delayed_work(laundry); 538909121281SStanislav Kinsbursky struct nfsd_net *nn = container_of(dwork, struct nfsd_net, 539009121281SStanislav Kinsbursky laundromat_work); 53911da177e4SLinus Torvalds 539209121281SStanislav Kinsbursky t = nfs4_laundromat(nn); 539309121281SStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); 53941da177e4SLinus Torvalds } 53951da177e4SLinus Torvalds 53968fcd461dSJeff Layton static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stid *stp) 5397f8816512SNeilBrown { 53988fcd461dSJeff Layton if (!fh_match(&fhp->fh_handle, &stp->sc_file->fi_fhandle)) 5399f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 5400f7a4d872SJ. Bruce Fields return nfs_ok; 54011da177e4SLinus Torvalds } 54021da177e4SLinus Torvalds 54031da177e4SLinus Torvalds static inline int 540482c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 54051da177e4SLinus Torvalds { 540682c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 540782c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 540882c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 54091da177e4SLinus Torvalds } 54101da177e4SLinus Torvalds 54111da177e4SLinus Torvalds static inline int 541282c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 54131da177e4SLinus Torvalds { 541482c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 541582c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 54161da177e4SLinus Torvalds } 54171da177e4SLinus Torvalds 54181da177e4SLinus Torvalds static 5419dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 54201da177e4SLinus Torvalds { 5421b37ad28bSAl Viro __be32 status = nfserr_openmode; 54221da177e4SLinus Torvalds 542302921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 542402921914SJ. Bruce Fields if (stp->st_openstp) 542502921914SJ. Bruce Fields stp = stp->st_openstp; 542682c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 54271da177e4SLinus Torvalds goto out; 542882c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 54291da177e4SLinus Torvalds goto out; 54301da177e4SLinus Torvalds status = nfs_ok; 54311da177e4SLinus Torvalds out: 54321da177e4SLinus Torvalds return status; 54331da177e4SLinus Torvalds } 54341da177e4SLinus Torvalds 5435b37ad28bSAl Viro static inline __be32 54365ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 54371da177e4SLinus Torvalds { 5438203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 54391da177e4SLinus Torvalds return nfs_ok; 5440c87fb4a3SJ. Bruce Fields else if (opens_in_grace(net)) { 544125985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 54421da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 54431da177e4SLinus Torvalds return nfserr_grace; 54441da177e4SLinus Torvalds } else if (flags & WR_STATE) 54451da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 54461da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 54471da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 54481da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 54491da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 54501da177e4SLinus Torvalds } 54511da177e4SLinus Torvalds 54521da177e4SLinus Torvalds /* 54531da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 54541da177e4SLinus Torvalds * that are not able to provide mandatory locking. 54551da177e4SLinus Torvalds */ 54561da177e4SLinus Torvalds static inline int 54575ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 54581da177e4SLinus Torvalds { 5459c87fb4a3SJ. Bruce Fields return opens_in_grace(net) && mandatory_lock(inode); 54601da177e4SLinus Torvalds } 54611da177e4SLinus Torvalds 546257b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 54630836f587SJ. Bruce Fields { 54646668958fSAndy Adamson /* 54656668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 54666668958fSAndy Adamson * when it is zero. 54676668958fSAndy Adamson */ 546828dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 546981b82965SJ. Bruce Fields return nfs_ok; 547081b82965SJ. Bruce Fields 547181b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 547281b82965SJ. Bruce Fields return nfs_ok; 54736668958fSAndy Adamson 54740836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 547514b7f4a1SJeff Layton if (nfsd4_stateid_generation_after(in, ref)) 54760836f587SJ. Bruce Fields return nfserr_bad_stateid; 54770836f587SJ. Bruce Fields /* 547881b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 547981b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 548081b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 548181b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 548281b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 548381b82965SJ. Bruce Fields * but better performance may result in retrying IO that 548481b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 548581b82965SJ. Bruce Fields * reordered in flight: 54860836f587SJ. Bruce Fields */ 54870836f587SJ. Bruce Fields return nfserr_old_stateid; 54880836f587SJ. Bruce Fields } 54890836f587SJ. Bruce Fields 549003da3169STrond Myklebust static __be32 nfsd4_stid_check_stateid_generation(stateid_t *in, struct nfs4_stid *s, bool has_session) 549103da3169STrond Myklebust { 549203da3169STrond Myklebust __be32 ret; 549303da3169STrond Myklebust 549403da3169STrond Myklebust spin_lock(&s->sc_lock); 549503da3169STrond Myklebust ret = nfsd4_verify_open_stid(s); 549603da3169STrond Myklebust if (ret == nfs_ok) 549703da3169STrond Myklebust ret = check_stateid_generation(in, &s->sc_stateid, has_session); 549803da3169STrond Myklebust spin_unlock(&s->sc_lock); 549903da3169STrond Myklebust return ret; 550003da3169STrond Myklebust } 550103da3169STrond Myklebust 5502ebe9cb3bSChristoph Hellwig static __be32 nfsd4_check_openowner_confirmed(struct nfs4_ol_stateid *ols) 5503ebe9cb3bSChristoph Hellwig { 5504ebe9cb3bSChristoph Hellwig if (ols->st_stateowner->so_is_open_owner && 5505ebe9cb3bSChristoph Hellwig !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 5506ebe9cb3bSChristoph Hellwig return nfserr_bad_stateid; 5507ebe9cb3bSChristoph Hellwig return nfs_ok; 5508ebe9cb3bSChristoph Hellwig } 5509ebe9cb3bSChristoph Hellwig 55107df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 551117456804SBryan Schumaker { 551297b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 55131af71cc8SJeff Layton __be32 status = nfserr_bad_stateid; 551417456804SBryan Schumaker 5515ae254dacSAndrew Elble if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || 5516ae254dacSAndrew Elble CLOSE_STATEID(stateid)) 55171af71cc8SJeff Layton return status; 5518663e36f0SJ. Bruce Fields if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) 55191af71cc8SJeff Layton return status; 55201af71cc8SJeff Layton spin_lock(&cl->cl_lock); 55211af71cc8SJeff Layton s = find_stateid_locked(cl, stateid); 552297b7e3b6SJ. Bruce Fields if (!s) 55231af71cc8SJeff Layton goto out_unlock; 552403da3169STrond Myklebust status = nfsd4_stid_check_stateid_generation(stateid, s, 1); 552517456804SBryan Schumaker if (status) 55261af71cc8SJeff Layton goto out_unlock; 552723340032SJ. Bruce Fields switch (s->sc_type) { 552823340032SJ. Bruce Fields case NFS4_DELEG_STID: 55291af71cc8SJeff Layton status = nfs_ok; 55301af71cc8SJeff Layton break; 55313bd64a5bSJ. Bruce Fields case NFS4_REVOKED_DELEG_STID: 55321af71cc8SJeff Layton status = nfserr_deleg_revoked; 55331af71cc8SJeff Layton break; 553423340032SJ. Bruce Fields case NFS4_OPEN_STID: 553523340032SJ. Bruce Fields case NFS4_LOCK_STID: 5536ebe9cb3bSChristoph Hellwig status = nfsd4_check_openowner_confirmed(openlockstateid(s)); 55371af71cc8SJeff Layton break; 553823340032SJ. Bruce Fields default: 553923340032SJ. Bruce Fields printk("unknown stateid type %x\n", s->sc_type); 5540b0fc29d6STrond Myklebust /* Fallthrough */ 554123340032SJ. Bruce Fields case NFS4_CLOSED_STID: 5542b0fc29d6STrond Myklebust case NFS4_CLOSED_DELEG_STID: 55431af71cc8SJeff Layton status = nfserr_bad_stateid; 554423340032SJ. Bruce Fields } 55451af71cc8SJeff Layton out_unlock: 55461af71cc8SJeff Layton spin_unlock(&cl->cl_lock); 55471af71cc8SJeff Layton return status; 554817456804SBryan Schumaker } 554917456804SBryan Schumaker 5550cd61c522SChristoph Hellwig __be32 55512dd6e458STrond Myklebust nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 55522dd6e458STrond Myklebust stateid_t *stateid, unsigned char typemask, 55532dd6e458STrond Myklebust struct nfs4_stid **s, struct nfsd_net *nn) 555438c2f4b1SJ. Bruce Fields { 55550eb6f20aSJ. Bruce Fields __be32 status; 555695da1b3aSAndrew Elble bool return_revoked = false; 555795da1b3aSAndrew Elble 555895da1b3aSAndrew Elble /* 555995da1b3aSAndrew Elble * only return revoked delegations if explicitly asked. 556095da1b3aSAndrew Elble * otherwise we report revoked or bad_stateid status. 556195da1b3aSAndrew Elble */ 556295da1b3aSAndrew Elble if (typemask & NFS4_REVOKED_DELEG_STID) 556395da1b3aSAndrew Elble return_revoked = true; 556495da1b3aSAndrew Elble else if (typemask & NFS4_DELEG_STID) 556595da1b3aSAndrew Elble typemask |= NFS4_REVOKED_DELEG_STID; 556638c2f4b1SJ. Bruce Fields 5567ae254dacSAndrew Elble if (ZERO_STATEID(stateid) || ONE_STATEID(stateid) || 5568ae254dacSAndrew Elble CLOSE_STATEID(stateid)) 556938c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 5570b7342204SOlga Kornievskaia status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn, 5571b7342204SOlga Kornievskaia false); 5572a8a7c677STrond Myklebust if (status == nfserr_stale_clientid) { 55734b24ca7dSJeff Layton if (cstate->session) 5574a8a7c677STrond Myklebust return nfserr_bad_stateid; 557538c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 5576a8a7c677STrond Myklebust } 55770eb6f20aSJ. Bruce Fields if (status) 55780eb6f20aSJ. Bruce Fields return status; 55794b24ca7dSJeff Layton *s = find_stateid_by_type(cstate->clp, stateid, typemask); 558038c2f4b1SJ. Bruce Fields if (!*s) 558138c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 558295da1b3aSAndrew Elble if (((*s)->sc_type == NFS4_REVOKED_DELEG_STID) && !return_revoked) { 558395da1b3aSAndrew Elble nfs4_put_stid(*s); 558495da1b3aSAndrew Elble if (cstate->minorversion) 558595da1b3aSAndrew Elble return nfserr_deleg_revoked; 558695da1b3aSAndrew Elble return nfserr_bad_stateid; 558795da1b3aSAndrew Elble } 558838c2f4b1SJ. Bruce Fields return nfs_ok; 558938c2f4b1SJ. Bruce Fields } 559038c2f4b1SJ. Bruce Fields 5591eb82dd39SJeff Layton static struct nfsd_file * 5592a0649b2dSChristoph Hellwig nfs4_find_file(struct nfs4_stid *s, int flags) 5593a0649b2dSChristoph Hellwig { 5594af90f707SChristoph Hellwig if (!s) 5595af90f707SChristoph Hellwig return NULL; 5596af90f707SChristoph Hellwig 5597a0649b2dSChristoph Hellwig switch (s->sc_type) { 5598a0649b2dSChristoph Hellwig case NFS4_DELEG_STID: 5599a0649b2dSChristoph Hellwig if (WARN_ON_ONCE(!s->sc_file->fi_deleg_file)) 5600a0649b2dSChristoph Hellwig return NULL; 5601eb82dd39SJeff Layton return nfsd_file_get(s->sc_file->fi_deleg_file); 5602a0649b2dSChristoph Hellwig case NFS4_OPEN_STID: 5603a0649b2dSChristoph Hellwig case NFS4_LOCK_STID: 5604a0649b2dSChristoph Hellwig if (flags & RD_STATE) 5605a0649b2dSChristoph Hellwig return find_readable_file(s->sc_file); 5606a0649b2dSChristoph Hellwig else 5607a0649b2dSChristoph Hellwig return find_writeable_file(s->sc_file); 5608a0649b2dSChristoph Hellwig break; 5609a0649b2dSChristoph Hellwig } 5610a0649b2dSChristoph Hellwig 5611a0649b2dSChristoph Hellwig return NULL; 5612a0649b2dSChristoph Hellwig } 5613a0649b2dSChristoph Hellwig 5614a0649b2dSChristoph Hellwig static __be32 5615d8836f77SJ. Bruce Fields nfs4_check_olstateid(struct nfs4_ol_stateid *ols, int flags) 5616a0649b2dSChristoph Hellwig { 5617a0649b2dSChristoph Hellwig __be32 status; 5618a0649b2dSChristoph Hellwig 5619a0649b2dSChristoph Hellwig status = nfsd4_check_openowner_confirmed(ols); 5620a0649b2dSChristoph Hellwig if (status) 5621a0649b2dSChristoph Hellwig return status; 5622a0649b2dSChristoph Hellwig return nfs4_check_openmode(ols, flags); 5623a0649b2dSChristoph Hellwig } 5624a0649b2dSChristoph Hellwig 5625af90f707SChristoph Hellwig static __be32 5626af90f707SChristoph Hellwig nfs4_check_file(struct svc_rqst *rqstp, struct svc_fh *fhp, struct nfs4_stid *s, 56275c4583b2SJeff Layton struct nfsd_file **nfp, int flags) 5628af90f707SChristoph Hellwig { 5629af90f707SChristoph Hellwig int acc = (flags & RD_STATE) ? NFSD_MAY_READ : NFSD_MAY_WRITE; 5630eb82dd39SJeff Layton struct nfsd_file *nf; 5631af90f707SChristoph Hellwig __be32 status; 5632af90f707SChristoph Hellwig 5633eb82dd39SJeff Layton nf = nfs4_find_file(s, flags); 5634eb82dd39SJeff Layton if (nf) { 5635af90f707SChristoph Hellwig status = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry, 5636af90f707SChristoph Hellwig acc | NFSD_MAY_OWNER_OVERRIDE); 56375c4583b2SJeff Layton if (status) { 56385c4583b2SJeff Layton nfsd_file_put(nf); 5639eb82dd39SJeff Layton goto out; 56405c4583b2SJeff Layton } 5641af90f707SChristoph Hellwig } else { 5642eb82dd39SJeff Layton status = nfsd_file_acquire(rqstp, fhp, acc, &nf); 5643af90f707SChristoph Hellwig if (status) 5644af90f707SChristoph Hellwig return status; 5645af90f707SChristoph Hellwig } 56465c4583b2SJeff Layton *nfp = nf; 5647eb82dd39SJeff Layton out: 5648eb82dd39SJeff Layton return status; 5649af90f707SChristoph Hellwig } 5650624322f1SOlga Kornievskaia static void 5651624322f1SOlga Kornievskaia _free_cpntf_state_locked(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) 5652624322f1SOlga Kornievskaia { 5653624322f1SOlga Kornievskaia WARN_ON_ONCE(cps->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID); 5654624322f1SOlga Kornievskaia if (!refcount_dec_and_test(&cps->cp_stateid.sc_count)) 5655624322f1SOlga Kornievskaia return; 5656624322f1SOlga Kornievskaia list_del(&cps->cp_list); 5657624322f1SOlga Kornievskaia idr_remove(&nn->s2s_cp_stateids, 5658624322f1SOlga Kornievskaia cps->cp_stateid.stid.si_opaque.so_id); 5659624322f1SOlga Kornievskaia kfree(cps); 5660624322f1SOlga Kornievskaia } 5661b7342204SOlga Kornievskaia /* 5662b7342204SOlga Kornievskaia * A READ from an inter server to server COPY will have a 5663b7342204SOlga Kornievskaia * copy stateid. Look up the copy notify stateid from the 5664b7342204SOlga Kornievskaia * idr structure and take a reference on it. 5665b7342204SOlga Kornievskaia */ 5666ce0887acSOlga Kornievskaia __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st, 5667ce0887acSOlga Kornievskaia struct nfs4_client *clp, 5668b7342204SOlga Kornievskaia struct nfs4_cpntf_state **cps) 5669b7342204SOlga Kornievskaia { 5670b7342204SOlga Kornievskaia copy_stateid_t *cps_t; 5671b7342204SOlga Kornievskaia struct nfs4_cpntf_state *state = NULL; 5672b7342204SOlga Kornievskaia 5673b7342204SOlga Kornievskaia if (st->si_opaque.so_clid.cl_id != nn->s2s_cp_cl_id) 5674b7342204SOlga Kornievskaia return nfserr_bad_stateid; 5675b7342204SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 5676b7342204SOlga Kornievskaia cps_t = idr_find(&nn->s2s_cp_stateids, st->si_opaque.so_id); 5677b7342204SOlga Kornievskaia if (cps_t) { 5678b7342204SOlga Kornievskaia state = container_of(cps_t, struct nfs4_cpntf_state, 5679b7342204SOlga Kornievskaia cp_stateid); 56805277a79eSDan Carpenter if (state->cp_stateid.sc_type != NFS4_COPYNOTIFY_STID) { 56815277a79eSDan Carpenter state = NULL; 56825277a79eSDan Carpenter goto unlock; 56835277a79eSDan Carpenter } 5684ce0887acSOlga Kornievskaia if (!clp) 5685b7342204SOlga Kornievskaia refcount_inc(&state->cp_stateid.sc_count); 5686ce0887acSOlga Kornievskaia else 5687ce0887acSOlga Kornievskaia _free_cpntf_state_locked(nn, state); 5688b7342204SOlga Kornievskaia } 56895277a79eSDan Carpenter unlock: 5690b7342204SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 5691b7342204SOlga Kornievskaia if (!state) 5692b7342204SOlga Kornievskaia return nfserr_bad_stateid; 5693ce0887acSOlga Kornievskaia if (!clp && state) 5694b7342204SOlga Kornievskaia *cps = state; 5695b7342204SOlga Kornievskaia return 0; 5696b7342204SOlga Kornievskaia } 5697b7342204SOlga Kornievskaia 5698b7342204SOlga Kornievskaia static __be32 find_cpntf_state(struct nfsd_net *nn, stateid_t *st, 5699b7342204SOlga Kornievskaia struct nfs4_stid **stid) 5700b7342204SOlga Kornievskaia { 5701b7342204SOlga Kornievskaia __be32 status; 5702b7342204SOlga Kornievskaia struct nfs4_cpntf_state *cps = NULL; 5703b7342204SOlga Kornievskaia struct nfsd4_compound_state cstate; 5704b7342204SOlga Kornievskaia 5705ce0887acSOlga Kornievskaia status = manage_cpntf_state(nn, st, NULL, &cps); 5706b7342204SOlga Kornievskaia if (status) 5707b7342204SOlga Kornievskaia return status; 5708b7342204SOlga Kornievskaia 570920b7d86fSArnd Bergmann cps->cpntf_time = ktime_get_boottime_seconds(); 5710b7342204SOlga Kornievskaia memset(&cstate, 0, sizeof(cstate)); 5711b7342204SOlga Kornievskaia status = lookup_clientid(&cps->cp_p_clid, &cstate, nn, true); 5712b7342204SOlga Kornievskaia if (status) 5713b7342204SOlga Kornievskaia goto out; 5714b7342204SOlga Kornievskaia status = nfsd4_lookup_stateid(&cstate, &cps->cp_p_stateid, 5715b7342204SOlga Kornievskaia NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, 5716b7342204SOlga Kornievskaia stid, nn); 5717b7342204SOlga Kornievskaia put_client_renew(cstate.clp); 5718b7342204SOlga Kornievskaia out: 5719b7342204SOlga Kornievskaia nfs4_put_cpntf_state(nn, cps); 5720b7342204SOlga Kornievskaia return status; 5721b7342204SOlga Kornievskaia } 5722624322f1SOlga Kornievskaia 5723624322f1SOlga Kornievskaia void nfs4_put_cpntf_state(struct nfsd_net *nn, struct nfs4_cpntf_state *cps) 5724624322f1SOlga Kornievskaia { 5725624322f1SOlga Kornievskaia spin_lock(&nn->s2s_cp_lock); 5726624322f1SOlga Kornievskaia _free_cpntf_state_locked(nn, cps); 5727624322f1SOlga Kornievskaia spin_unlock(&nn->s2s_cp_lock); 5728624322f1SOlga Kornievskaia } 5729af90f707SChristoph Hellwig 57301da177e4SLinus Torvalds /* 57311da177e4SLinus Torvalds * Checks for stateid operations 57321da177e4SLinus Torvalds */ 5733b37ad28bSAl Viro __be32 5734af90f707SChristoph Hellwig nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, 5735aa0d6aedSAnna Schumaker struct nfsd4_compound_state *cstate, struct svc_fh *fhp, 5736624322f1SOlga Kornievskaia stateid_t *stateid, int flags, struct nfsd_file **nfp, 5737624322f1SOlga Kornievskaia struct nfs4_stid **cstid) 57381da177e4SLinus Torvalds { 5739a0649b2dSChristoph Hellwig struct inode *ino = d_inode(fhp->fh_dentry); 5740af90f707SChristoph Hellwig struct net *net = SVC_NET(rqstp); 57413320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 5742af90f707SChristoph Hellwig struct nfs4_stid *s = NULL; 5743b37ad28bSAl Viro __be32 status; 57441da177e4SLinus Torvalds 57455c4583b2SJeff Layton if (nfp) 57465c4583b2SJeff Layton *nfp = NULL; 57471da177e4SLinus Torvalds 57485ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 57491da177e4SLinus Torvalds return nfserr_grace; 57501da177e4SLinus Torvalds 5751af90f707SChristoph Hellwig if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 5752af90f707SChristoph Hellwig status = check_special_stateids(net, fhp, stateid, flags); 5753af90f707SChristoph Hellwig goto done; 5754af90f707SChristoph Hellwig } 57551da177e4SLinus Torvalds 57562dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, 5757db24b3b4SJeff Layton NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, 57582dd6e458STrond Myklebust &s, nn); 5759b7342204SOlga Kornievskaia if (status == nfserr_bad_stateid) 5760b7342204SOlga Kornievskaia status = find_cpntf_state(nn, stateid, &s); 576138c2f4b1SJ. Bruce Fields if (status) 5762c2d1d6a8STrond Myklebust return status; 576303da3169STrond Myklebust status = nfsd4_stid_check_stateid_generation(stateid, s, 5764a0649b2dSChristoph Hellwig nfsd4_has_session(cstate)); 57650c2a498fSJ. Bruce Fields if (status) 57660c2a498fSJ. Bruce Fields goto out; 5767a0649b2dSChristoph Hellwig 5768f7a4d872SJ. Bruce Fields switch (s->sc_type) { 5769f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 5770a0649b2dSChristoph Hellwig status = nfs4_check_delegmode(delegstateid(s), flags); 5771f7a4d872SJ. Bruce Fields break; 5772f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 5773f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 5774d8836f77SJ. Bruce Fields status = nfs4_check_olstateid(openlockstateid(s), flags); 5775f7a4d872SJ. Bruce Fields break; 5776f7a4d872SJ. Bruce Fields default: 577714bcab1aSTrond Myklebust status = nfserr_bad_stateid; 5778a0649b2dSChristoph Hellwig break; 57791da177e4SLinus Torvalds } 57808fcd461dSJeff Layton if (status) 57818fcd461dSJeff Layton goto out; 57828fcd461dSJeff Layton status = nfs4_check_fh(fhp, s); 5783a0649b2dSChristoph Hellwig 5784af90f707SChristoph Hellwig done: 57855c4583b2SJeff Layton if (status == nfs_ok && nfp) 57865c4583b2SJeff Layton status = nfs4_check_file(rqstp, fhp, s, nfp, flags); 57871da177e4SLinus Torvalds out: 5788624322f1SOlga Kornievskaia if (s) { 5789624322f1SOlga Kornievskaia if (!status && cstid) 5790624322f1SOlga Kornievskaia *cstid = s; 5791624322f1SOlga Kornievskaia else 5792fd911011STrond Myklebust nfs4_put_stid(s); 5793624322f1SOlga Kornievskaia } 57941da177e4SLinus Torvalds return status; 57951da177e4SLinus Torvalds } 57961da177e4SLinus Torvalds 5797e1ca12dfSBryan Schumaker /* 579817456804SBryan Schumaker * Test if the stateid is valid 579917456804SBryan Schumaker */ 580017456804SBryan Schumaker __be32 580117456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 5802eb69853dSChristoph Hellwig union nfsd4_op_u *u) 580317456804SBryan Schumaker { 5804eb69853dSChristoph Hellwig struct nfsd4_test_stateid *test_stateid = &u->test_stateid; 580503cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 580603cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 580703cfb420SBryan Schumaker 580803cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 58097df302f7SChuck Lever stateid->ts_id_status = 58107df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 581103cfb420SBryan Schumaker 581217456804SBryan Schumaker return nfs_ok; 581317456804SBryan Schumaker } 581417456804SBryan Schumaker 581542691398SChuck Lever static __be32 581642691398SChuck Lever nfsd4_free_lock_stateid(stateid_t *stateid, struct nfs4_stid *s) 581742691398SChuck Lever { 581842691398SChuck Lever struct nfs4_ol_stateid *stp = openlockstateid(s); 581942691398SChuck Lever __be32 ret; 582042691398SChuck Lever 5821659aefb6STrond Myklebust ret = nfsd4_lock_ol_stateid(stp); 5822659aefb6STrond Myklebust if (ret) 5823659aefb6STrond Myklebust goto out_put_stid; 582442691398SChuck Lever 582542691398SChuck Lever ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 582642691398SChuck Lever if (ret) 582742691398SChuck Lever goto out; 582842691398SChuck Lever 582942691398SChuck Lever ret = nfserr_locks_held; 583042691398SChuck Lever if (check_for_locks(stp->st_stid.sc_file, 583142691398SChuck Lever lockowner(stp->st_stateowner))) 583242691398SChuck Lever goto out; 583342691398SChuck Lever 583442691398SChuck Lever release_lock_stateid(stp); 583542691398SChuck Lever ret = nfs_ok; 583642691398SChuck Lever 583742691398SChuck Lever out: 583842691398SChuck Lever mutex_unlock(&stp->st_mutex); 5839659aefb6STrond Myklebust out_put_stid: 584042691398SChuck Lever nfs4_put_stid(s); 584142691398SChuck Lever return ret; 584242691398SChuck Lever } 584342691398SChuck Lever 5844e1ca12dfSBryan Schumaker __be32 5845e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 5846eb69853dSChristoph Hellwig union nfsd4_op_u *u) 5847e1ca12dfSBryan Schumaker { 5848eb69853dSChristoph Hellwig struct nfsd4_free_stateid *free_stateid = &u->free_stateid; 5849e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 58502da1cec7SJ. Bruce Fields struct nfs4_stid *s; 58513bd64a5bSJ. Bruce Fields struct nfs4_delegation *dp; 585238c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 58532da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 5854e1ca12dfSBryan Schumaker 58551af71cc8SJeff Layton spin_lock(&cl->cl_lock); 58561af71cc8SJeff Layton s = find_stateid_locked(cl, stateid); 58572da1cec7SJ. Bruce Fields if (!s) 58581af71cc8SJeff Layton goto out_unlock; 585903da3169STrond Myklebust spin_lock(&s->sc_lock); 58602da1cec7SJ. Bruce Fields switch (s->sc_type) { 58612da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 5862e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 58631af71cc8SJeff Layton break; 58642da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 58651af71cc8SJeff Layton ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 58661af71cc8SJeff Layton if (ret) 58671af71cc8SJeff Layton break; 58681af71cc8SJeff Layton ret = nfserr_locks_held; 58691af71cc8SJeff Layton break; 58702da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 587103da3169STrond Myklebust spin_unlock(&s->sc_lock); 5872a15dfcd5SElena Reshetova refcount_inc(&s->sc_count); 58731af71cc8SJeff Layton spin_unlock(&cl->cl_lock); 587442691398SChuck Lever ret = nfsd4_free_lock_stateid(stateid, s); 58751af71cc8SJeff Layton goto out; 58763bd64a5bSJ. Bruce Fields case NFS4_REVOKED_DELEG_STID: 587703da3169STrond Myklebust spin_unlock(&s->sc_lock); 58783bd64a5bSJ. Bruce Fields dp = delegstateid(s); 58792d4a532dSJeff Layton list_del_init(&dp->dl_recall_lru); 58802d4a532dSJeff Layton spin_unlock(&cl->cl_lock); 58816011695dSTrond Myklebust nfs4_put_stid(s); 58823bd64a5bSJ. Bruce Fields ret = nfs_ok; 58831af71cc8SJeff Layton goto out; 58841af71cc8SJeff Layton /* Default falls through and returns nfserr_bad_stateid */ 5885e1ca12dfSBryan Schumaker } 588603da3169STrond Myklebust spin_unlock(&s->sc_lock); 58871af71cc8SJeff Layton out_unlock: 58881af71cc8SJeff Layton spin_unlock(&cl->cl_lock); 5889e1ca12dfSBryan Schumaker out: 5890e1ca12dfSBryan Schumaker return ret; 5891e1ca12dfSBryan Schumaker } 5892e1ca12dfSBryan Schumaker 58934c4cd222SNeilBrown static inline int 58944c4cd222SNeilBrown setlkflg (int type) 58954c4cd222SNeilBrown { 58964c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 58974c4cd222SNeilBrown RD_STATE : WR_STATE; 58984c4cd222SNeilBrown } 58991da177e4SLinus Torvalds 5900dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 5901c0a5d93eSJ. Bruce Fields { 5902c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 5903c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 5904c0a5d93eSJ. Bruce Fields __be32 status; 5905c0a5d93eSJ. Bruce Fields 5906c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 5907c0a5d93eSJ. Bruce Fields if (status) 5908c0a5d93eSJ. Bruce Fields return status; 59099271d7e5STrond Myklebust status = nfsd4_lock_ol_stateid(stp); 59109271d7e5STrond Myklebust if (status != nfs_ok) 59119271d7e5STrond Myklebust return status; 5912f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 591335a92fe8SJeff Layton if (status == nfs_ok) 591435a92fe8SJeff Layton status = nfs4_check_fh(current_fh, &stp->st_stid); 591535a92fe8SJeff Layton if (status != nfs_ok) 5916feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 5917f7a4d872SJ. Bruce Fields return status; 5918c0a5d93eSJ. Bruce Fields } 5919c0a5d93eSJ. Bruce Fields 59201da177e4SLinus Torvalds /* 59211da177e4SLinus Torvalds * Checks for sequence id mutating operations. 59221da177e4SLinus Torvalds */ 5923b37ad28bSAl Viro static __be32 5924dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 59252288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 59263320fef1SStanislav Kinsbursky struct nfs4_ol_stateid **stpp, 59273320fef1SStanislav Kinsbursky struct nfsd_net *nn) 59281da177e4SLinus Torvalds { 59290836f587SJ. Bruce Fields __be32 status; 593038c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 5931e17f99b7STrond Myklebust struct nfs4_ol_stateid *stp = NULL; 59321da177e4SLinus Torvalds 5933dd5e3fbcSChuck Lever trace_nfsd_preprocess(seqid, stateid); 59341da177e4SLinus Torvalds 59351da177e4SLinus Torvalds *stpp = NULL; 59362dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); 5937c0a5d93eSJ. Bruce Fields if (status) 5938c0a5d93eSJ. Bruce Fields return status; 5939e17f99b7STrond Myklebust stp = openlockstateid(s); 594058fb12e6SJeff Layton nfsd4_cstate_assign_replay(cstate, stp->st_stateowner); 59411da177e4SLinus Torvalds 5942e17f99b7STrond Myklebust status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); 5943fd911011STrond Myklebust if (!status) 5944e17f99b7STrond Myklebust *stpp = stp; 5945fd911011STrond Myklebust else 5946fd911011STrond Myklebust nfs4_put_stid(&stp->st_stid); 5947e17f99b7STrond Myklebust return status; 59481da177e4SLinus Torvalds } 59491da177e4SLinus Torvalds 59503320fef1SStanislav Kinsbursky static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 59513320fef1SStanislav Kinsbursky stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) 5952c0a5d93eSJ. Bruce Fields { 5953c0a5d93eSJ. Bruce Fields __be32 status; 5954c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 59554cbfc9f7STrond Myklebust struct nfs4_ol_stateid *stp; 59561da177e4SLinus Torvalds 5957c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 59584cbfc9f7STrond Myklebust NFS4_OPEN_STID, &stp, nn); 59590836f587SJ. Bruce Fields if (status) 59600836f587SJ. Bruce Fields return status; 59614cbfc9f7STrond Myklebust oo = openowner(stp->st_stateowner); 59624cbfc9f7STrond Myklebust if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 5963feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 59644cbfc9f7STrond Myklebust nfs4_put_stid(&stp->st_stid); 5965c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 59664cbfc9f7STrond Myklebust } 59674cbfc9f7STrond Myklebust *stpp = stp; 59683a4f98bbSNeilBrown return nfs_ok; 59691da177e4SLinus Torvalds } 59701da177e4SLinus Torvalds 5971b37ad28bSAl Viro __be32 5972ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 5973eb69853dSChristoph Hellwig union nfsd4_op_u *u) 59741da177e4SLinus Torvalds { 5975eb69853dSChristoph Hellwig struct nfsd4_open_confirm *oc = &u->open_confirm; 5976b37ad28bSAl Viro __be32 status; 5977fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 5978dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 59793320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 59801da177e4SLinus Torvalds 5981a6a9f18fSAl Viro dprintk("NFSD: nfsd4_open_confirm on file %pd\n", 5982a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 59831da177e4SLinus Torvalds 5984ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 5985a8cddc5dSJ. Bruce Fields if (status) 5986a8cddc5dSJ. Bruce Fields return status; 59871da177e4SLinus Torvalds 59889072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 5989ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 59903320fef1SStanislav Kinsbursky NFS4_OPEN_STID, &stp, nn); 59919072d5c6SJ. Bruce Fields if (status) 59921da177e4SLinus Torvalds goto out; 5993fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 599468b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 599535a92fe8SJeff Layton if (oo->oo_flags & NFS4_OO_CONFIRMED) { 5996feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 59972585fc79STrond Myklebust goto put_stateid; 599835a92fe8SJeff Layton } 5999dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 60009767feb2SJeff Layton nfs4_inc_and_copy_stateid(&oc->oc_resp_stateid, &stp->st_stid); 6001feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 6002dd5e3fbcSChuck Lever trace_nfsd_open_confirm(oc->oc_seqid, &stp->st_stid.sc_stateid); 60032a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 600468b66e82SJ. Bruce Fields status = nfs_ok; 60052585fc79STrond Myklebust put_stateid: 60062585fc79STrond Myklebust nfs4_put_stid(&stp->st_stid); 60071da177e4SLinus Torvalds out: 60089411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 60091da177e4SLinus Torvalds return status; 60101da177e4SLinus Torvalds } 60111da177e4SLinus Torvalds 60126409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 60131da177e4SLinus Torvalds { 601482c5ff1bSJeff Layton if (!test_access(access, stp)) 60156409a5a6SJ. Bruce Fields return; 601611b9164aSTrond Myklebust nfs4_file_put_access(stp->st_stid.sc_file, access); 601782c5ff1bSJeff Layton clear_access(access, stp); 6018f197c271SJ. Bruce Fields } 60196409a5a6SJ. Bruce Fields 60206409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 60216409a5a6SJ. Bruce Fields { 60226409a5a6SJ. Bruce Fields switch (to_access) { 60236409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 60246409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 60256409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 60266409a5a6SJ. Bruce Fields break; 60276409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 60286409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 60296409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 60306409a5a6SJ. Bruce Fields break; 60316409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 60326409a5a6SJ. Bruce Fields break; 60336409a5a6SJ. Bruce Fields default: 6034063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 60351da177e4SLinus Torvalds } 60361da177e4SLinus Torvalds } 60371da177e4SLinus Torvalds 6038b37ad28bSAl Viro __be32 6039ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 6040eb69853dSChristoph Hellwig struct nfsd4_compound_state *cstate, union nfsd4_op_u *u) 60411da177e4SLinus Torvalds { 6042eb69853dSChristoph Hellwig struct nfsd4_open_downgrade *od = &u->open_downgrade; 6043b37ad28bSAl Viro __be32 status; 6044dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 60453320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 60461da177e4SLinus Torvalds 6047a6a9f18fSAl Viro dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", 6048a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 60491da177e4SLinus Torvalds 6050c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 60512c8bd7e0SBenny Halevy if (od->od_deleg_want) 60522c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 60532c8bd7e0SBenny Halevy od->od_deleg_want); 60541da177e4SLinus Torvalds 6055c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 60563320fef1SStanislav Kinsbursky &od->od_stateid, &stp, nn); 60579072d5c6SJ. Bruce Fields if (status) 60581da177e4SLinus Torvalds goto out; 60591da177e4SLinus Torvalds status = nfserr_inval; 606082c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 6061c11c591fSJeff Layton dprintk("NFSD: access not a subset of current bitmap: 0x%hhx, input access=%08x\n", 60621da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 60630667b1e9STrond Myklebust goto put_stateid; 60641da177e4SLinus Torvalds } 6065ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 6066c11c591fSJeff Layton dprintk("NFSD: deny not a subset of current bitmap: 0x%hhx, input deny=%08x\n", 60671da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 60680667b1e9STrond Myklebust goto put_stateid; 60691da177e4SLinus Torvalds } 60706409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 6071ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 60729767feb2SJeff Layton nfs4_inc_and_copy_stateid(&od->od_stateid, &stp->st_stid); 60731da177e4SLinus Torvalds status = nfs_ok; 60740667b1e9STrond Myklebust put_stateid: 6075feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 60760667b1e9STrond Myklebust nfs4_put_stid(&stp->st_stid); 60771da177e4SLinus Torvalds out: 60789411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 60791da177e4SLinus Torvalds return status; 60801da177e4SLinus Torvalds } 60811da177e4SLinus Torvalds 6082f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 6083f7a4d872SJ. Bruce Fields { 6084acf9295bSTrond Myklebust struct nfs4_client *clp = s->st_stid.sc_client; 6085e8568739SJeff Layton bool unhashed; 6086d83017f9SJeff Layton LIST_HEAD(reaplist); 6087acf9295bSTrond Myklebust 60882c41beb0SJeff Layton spin_lock(&clp->cl_lock); 6089e8568739SJeff Layton unhashed = unhash_open_stateid(s, &reaplist); 6090acf9295bSTrond Myklebust 6091d83017f9SJeff Layton if (clp->cl_minorversion) { 6092e8568739SJeff Layton if (unhashed) 6093d83017f9SJeff Layton put_ol_stateid_locked(s, &reaplist); 6094d83017f9SJeff Layton spin_unlock(&clp->cl_lock); 6095d83017f9SJeff Layton free_ol_stateid_reaplist(&reaplist); 6096d83017f9SJeff Layton } else { 6097d83017f9SJeff Layton spin_unlock(&clp->cl_lock); 6098d83017f9SJeff Layton free_ol_stateid_reaplist(&reaplist); 6099e8568739SJeff Layton if (unhashed) 6100d3134b10SJeff Layton move_to_close_lru(s, clp->net); 610138c387b5SJ. Bruce Fields } 6102d83017f9SJeff Layton } 610338c387b5SJ. Bruce Fields 61041da177e4SLinus Torvalds /* 61051da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 61061da177e4SLinus Torvalds */ 6107b37ad28bSAl Viro __be32 6108ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 6109eb69853dSChristoph Hellwig union nfsd4_op_u *u) 61101da177e4SLinus Torvalds { 6111eb69853dSChristoph Hellwig struct nfsd4_close *close = &u->close; 6112b37ad28bSAl Viro __be32 status; 6113dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 61143320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 61153320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 61161da177e4SLinus Torvalds 6117a6a9f18fSAl Viro dprintk("NFSD: nfsd4_close on file %pd\n", 6118a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 61191da177e4SLinus Torvalds 6120f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 6121f7a4d872SJ. Bruce Fields &close->cl_stateid, 6122f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 61233320fef1SStanislav Kinsbursky &stp, nn); 61249411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 61259072d5c6SJ. Bruce Fields if (status) 61261da177e4SLinus Torvalds goto out; 612715ca08d3STrond Myklebust 612815ca08d3STrond Myklebust stp->st_stid.sc_type = NFS4_CLOSED_STID; 6129bd2decacSJeff Layton 6130bd2decacSJeff Layton /* 6131bd2decacSJeff Layton * Technically we don't _really_ have to increment or copy it, since 6132bd2decacSJeff Layton * it should just be gone after this operation and we clobber the 6133bd2decacSJeff Layton * copied value below, but we continue to do so here just to ensure 6134bd2decacSJeff Layton * that racing ops see that there was a state change. 6135bd2decacSJeff Layton */ 61369767feb2SJeff Layton nfs4_inc_and_copy_stateid(&close->cl_stateid, &stp->st_stid); 61371da177e4SLinus Torvalds 6138f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 613915ca08d3STrond Myklebust mutex_unlock(&stp->st_mutex); 61408a0b589dSTrond Myklebust 6141bd2decacSJeff Layton /* v4.1+ suggests that we send a special stateid in here, since the 6142bd2decacSJeff Layton * clients should just ignore this anyway. Since this is not useful 6143bd2decacSJeff Layton * for v4.0 clients either, we set it to the special close_stateid 6144bd2decacSJeff Layton * universally. 6145bd2decacSJeff Layton * 6146bd2decacSJeff Layton * See RFC5661 section 18.2.4, and RFC7530 section 16.2.5 6147bd2decacSJeff Layton */ 6148bd2decacSJeff Layton memcpy(&close->cl_stateid, &close_stateid, sizeof(close->cl_stateid)); 6149fb500a7cSTrond Myklebust 61508a0b589dSTrond Myklebust /* put reference from nfs4_preprocess_seqid_op */ 61518a0b589dSTrond Myklebust nfs4_put_stid(&stp->st_stid); 61521da177e4SLinus Torvalds out: 61531da177e4SLinus Torvalds return status; 61541da177e4SLinus Torvalds } 61551da177e4SLinus Torvalds 6156b37ad28bSAl Viro __be32 6157ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 6158eb69853dSChristoph Hellwig union nfsd4_op_u *u) 61591da177e4SLinus Torvalds { 6160eb69853dSChristoph Hellwig struct nfsd4_delegreturn *dr = &u->delegreturn; 6161203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 6162203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 616338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 6164b37ad28bSAl Viro __be32 status; 61653320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 61661da177e4SLinus Torvalds 6167ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 6168203a8c8eSJ. Bruce Fields return status; 61691da177e4SLinus Torvalds 61702dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); 617138c2f4b1SJ. Bruce Fields if (status) 6172203a8c8eSJ. Bruce Fields goto out; 617338c2f4b1SJ. Bruce Fields dp = delegstateid(s); 617403da3169STrond Myklebust status = nfsd4_stid_check_stateid_generation(stateid, &dp->dl_stid, nfsd4_has_session(cstate)); 6175203a8c8eSJ. Bruce Fields if (status) 6176fd911011STrond Myklebust goto put_stateid; 6177203a8c8eSJ. Bruce Fields 61783bd64a5bSJ. Bruce Fields destroy_delegation(dp); 6179fd911011STrond Myklebust put_stateid: 6180fd911011STrond Myklebust nfs4_put_stid(&dp->dl_stid); 61811da177e4SLinus Torvalds out: 61821da177e4SLinus Torvalds return status; 61831da177e4SLinus Torvalds } 61841da177e4SLinus Torvalds 618587df4de8SBenny Halevy static inline u64 618687df4de8SBenny Halevy end_offset(u64 start, u64 len) 618787df4de8SBenny Halevy { 618887df4de8SBenny Halevy u64 end; 618987df4de8SBenny Halevy 619087df4de8SBenny Halevy end = start + len; 619187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 619287df4de8SBenny Halevy } 619387df4de8SBenny Halevy 619487df4de8SBenny Halevy /* last octet in a range */ 619587df4de8SBenny Halevy static inline u64 619687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 619787df4de8SBenny Halevy { 619887df4de8SBenny Halevy u64 end; 619987df4de8SBenny Halevy 6200063b0fb9SJ. Bruce Fields WARN_ON_ONCE(!len); 620187df4de8SBenny Halevy end = start + len; 620287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 620387df4de8SBenny Halevy } 620487df4de8SBenny Halevy 62051da177e4SLinus Torvalds /* 62061da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 62071da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 62081da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 62091da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 62101da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 62111da177e4SLinus Torvalds * the VFS, but this is a very deep change! 62121da177e4SLinus Torvalds */ 62131da177e4SLinus Torvalds static inline void 62141da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 62151da177e4SLinus Torvalds { 62161da177e4SLinus Torvalds if (lock->fl_start < 0) 62171da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 62181da177e4SLinus Torvalds if (lock->fl_end < 0) 62191da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 62201da177e4SLinus Torvalds } 62211da177e4SLinus Torvalds 6222cae80b30SJeff Layton static fl_owner_t 6223cae80b30SJeff Layton nfsd4_fl_get_owner(fl_owner_t owner) 6224aef9583bSKinglong Mee { 6225cae80b30SJeff Layton struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; 6226cae80b30SJeff Layton 6227cae80b30SJeff Layton nfs4_get_stateowner(&lo->lo_owner); 6228cae80b30SJeff Layton return owner; 6229aef9583bSKinglong Mee } 6230aef9583bSKinglong Mee 6231cae80b30SJeff Layton static void 6232cae80b30SJeff Layton nfsd4_fl_put_owner(fl_owner_t owner) 6233aef9583bSKinglong Mee { 6234cae80b30SJeff Layton struct nfs4_lockowner *lo = (struct nfs4_lockowner *)owner; 6235aef9583bSKinglong Mee 6236cae80b30SJeff Layton if (lo) 6237aef9583bSKinglong Mee nfs4_put_stateowner(&lo->lo_owner); 6238aef9583bSKinglong Mee } 6239aef9583bSKinglong Mee 624076d348faSJeff Layton static void 624176d348faSJeff Layton nfsd4_lm_notify(struct file_lock *fl) 624276d348faSJeff Layton { 624376d348faSJeff Layton struct nfs4_lockowner *lo = (struct nfs4_lockowner *)fl->fl_owner; 624476d348faSJeff Layton struct net *net = lo->lo_owner.so_client->net; 624576d348faSJeff Layton struct nfsd_net *nn = net_generic(net, nfsd_net_id); 624676d348faSJeff Layton struct nfsd4_blocked_lock *nbl = container_of(fl, 624776d348faSJeff Layton struct nfsd4_blocked_lock, nbl_lock); 624876d348faSJeff Layton bool queue = false; 624976d348faSJeff Layton 62507919d0a2SJeff Layton /* An empty list means that something else is going to be using it */ 62510cc11a61SJeff Layton spin_lock(&nn->blocked_locks_lock); 625276d348faSJeff Layton if (!list_empty(&nbl->nbl_list)) { 625376d348faSJeff Layton list_del_init(&nbl->nbl_list); 62547919d0a2SJeff Layton list_del_init(&nbl->nbl_lru); 625576d348faSJeff Layton queue = true; 625676d348faSJeff Layton } 62570cc11a61SJeff Layton spin_unlock(&nn->blocked_locks_lock); 625876d348faSJeff Layton 625976d348faSJeff Layton if (queue) 626076d348faSJeff Layton nfsd4_run_cb(&nbl->nbl_cb); 626176d348faSJeff Layton } 626276d348faSJeff Layton 62637b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 626476d348faSJeff Layton .lm_notify = nfsd4_lm_notify, 6265aef9583bSKinglong Mee .lm_get_owner = nfsd4_fl_get_owner, 6266aef9583bSKinglong Mee .lm_put_owner = nfsd4_fl_put_owner, 6267d5b9026aSNeilBrown }; 62681da177e4SLinus Torvalds 62691da177e4SLinus Torvalds static inline void 62701da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 62711da177e4SLinus Torvalds { 6272fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 62731da177e4SLinus Torvalds 6274d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 6275fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 62766f4859b8SJ. Bruce Fields xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner, 62776f4859b8SJ. Bruce Fields GFP_KERNEL); 62787c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 62797c13f344SJ. Bruce Fields /* We just don't care that much */ 62807c13f344SJ. Bruce Fields goto nevermind; 6281fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 6282d5b9026aSNeilBrown } else { 62837c13f344SJ. Bruce Fields nevermind: 62847c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 62857c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 6286d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 6287d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 62881da177e4SLinus Torvalds } 62891da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 629087df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 629187df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 62921da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 62931da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 62941da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 62951da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 62961da177e4SLinus Torvalds } 62971da177e4SLinus Torvalds 6298fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 6299c8623999SKinglong Mee find_lockowner_str_locked(struct nfs4_client *clp, struct xdr_netobj *owner) 63001da177e4SLinus Torvalds { 6301d4f0489fSTrond Myklebust unsigned int strhashval = ownerstr_hashval(owner); 6302b3c32bcdSTrond Myklebust struct nfs4_stateowner *so; 63031da177e4SLinus Torvalds 63040a880a28STrond Myklebust lockdep_assert_held(&clp->cl_lock); 63050a880a28STrond Myklebust 6306d4f0489fSTrond Myklebust list_for_each_entry(so, &clp->cl_ownerstr_hashtbl[strhashval], 6307d4f0489fSTrond Myklebust so_strhash) { 6308b3c32bcdSTrond Myklebust if (so->so_is_open_owner) 6309b3c32bcdSTrond Myklebust continue; 6310b5971afaSKinglong Mee if (same_owner_str(so, owner)) 6311b5971afaSKinglong Mee return lockowner(nfs4_get_stateowner(so)); 63121da177e4SLinus Torvalds } 63131da177e4SLinus Torvalds return NULL; 63141da177e4SLinus Torvalds } 63151da177e4SLinus Torvalds 6316c58c6610STrond Myklebust static struct nfs4_lockowner * 6317c8623999SKinglong Mee find_lockowner_str(struct nfs4_client *clp, struct xdr_netobj *owner) 6318c58c6610STrond Myklebust { 6319c58c6610STrond Myklebust struct nfs4_lockowner *lo; 6320c58c6610STrond Myklebust 6321d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 6322c8623999SKinglong Mee lo = find_lockowner_str_locked(clp, owner); 6323d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 6324c58c6610STrond Myklebust return lo; 6325c58c6610STrond Myklebust } 6326c58c6610STrond Myklebust 63278f4b54c5SJeff Layton static void nfs4_unhash_lockowner(struct nfs4_stateowner *sop) 63288f4b54c5SJeff Layton { 6329c58c6610STrond Myklebust unhash_lockowner_locked(lockowner(sop)); 63308f4b54c5SJeff Layton } 63318f4b54c5SJeff Layton 63326b180f0bSJeff Layton static void nfs4_free_lockowner(struct nfs4_stateowner *sop) 63336b180f0bSJeff Layton { 63346b180f0bSJeff Layton struct nfs4_lockowner *lo = lockowner(sop); 63356b180f0bSJeff Layton 63366b180f0bSJeff Layton kmem_cache_free(lockowner_slab, lo); 63376b180f0bSJeff Layton } 63386b180f0bSJeff Layton 63396b180f0bSJeff Layton static const struct nfs4_stateowner_operations lockowner_ops = { 63408f4b54c5SJeff Layton .so_unhash = nfs4_unhash_lockowner, 63416b180f0bSJeff Layton .so_free = nfs4_free_lockowner, 63426b180f0bSJeff Layton }; 63436b180f0bSJeff Layton 63441da177e4SLinus Torvalds /* 63451da177e4SLinus Torvalds * Alloc a lock owner structure. 63461da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 634725985edcSLucas De Marchi * occurred. 63481da177e4SLinus Torvalds * 634916bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 63501da177e4SLinus Torvalds */ 6351fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 6352c58c6610STrond Myklebust alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, 6353c58c6610STrond Myklebust struct nfs4_ol_stateid *open_stp, 6354c58c6610STrond Myklebust struct nfsd4_lock *lock) 6355c58c6610STrond Myklebust { 6356c58c6610STrond Myklebust struct nfs4_lockowner *lo, *ret; 63571da177e4SLinus Torvalds 6358fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 6359fe0750e5SJ. Bruce Fields if (!lo) 63601da177e4SLinus Torvalds return NULL; 636176d348faSJeff Layton INIT_LIST_HEAD(&lo->lo_blocked); 6362fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 6363fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 63645db1c03fSJeff Layton lo->lo_owner.so_seqid = lock->lk_new_lock_seqid; 63656b180f0bSJeff Layton lo->lo_owner.so_ops = &lockowner_ops; 6366d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 6367c8623999SKinglong Mee ret = find_lockowner_str_locked(clp, &lock->lk_new_owner); 6368c58c6610STrond Myklebust if (ret == NULL) { 6369c58c6610STrond Myklebust list_add(&lo->lo_owner.so_strhash, 6370d4f0489fSTrond Myklebust &clp->cl_ownerstr_hashtbl[strhashval]); 6371c58c6610STrond Myklebust ret = lo; 6372c58c6610STrond Myklebust } else 6373d50ffdedSKinglong Mee nfs4_free_stateowner(&lo->lo_owner); 6374d50ffdedSKinglong Mee 6375d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 6376340f0ba1SJ. Bruce Fields return ret; 63771da177e4SLinus Torvalds } 63781da177e4SLinus Torvalds 6379fd1fd685STrond Myklebust static struct nfs4_ol_stateid * 6380a451b123STrond Myklebust find_lock_stateid(const struct nfs4_lockowner *lo, 6381a451b123STrond Myklebust const struct nfs4_ol_stateid *ost) 6382fd1fd685STrond Myklebust { 6383fd1fd685STrond Myklebust struct nfs4_ol_stateid *lst; 6384fd1fd685STrond Myklebust 6385a451b123STrond Myklebust lockdep_assert_held(&ost->st_stid.sc_client->cl_lock); 6386fd1fd685STrond Myklebust 6387a451b123STrond Myklebust /* If ost is not hashed, ost->st_locks will not be valid */ 6388a451b123STrond Myklebust if (!nfs4_ol_stateid_unhashed(ost)) 6389a451b123STrond Myklebust list_for_each_entry(lst, &ost->st_locks, st_locks) { 6390a451b123STrond Myklebust if (lst->st_stateowner == &lo->lo_owner) { 6391fd1fd685STrond Myklebust refcount_inc(&lst->st_stid.sc_count); 6392fd1fd685STrond Myklebust return lst; 6393fd1fd685STrond Myklebust } 6394fd1fd685STrond Myklebust } 6395fd1fd685STrond Myklebust return NULL; 6396fd1fd685STrond Myklebust } 6397fd1fd685STrond Myklebust 6398beeca19cSTrond Myklebust static struct nfs4_ol_stateid * 6399356a95ecSJeff Layton init_lock_stateid(struct nfs4_ol_stateid *stp, struct nfs4_lockowner *lo, 6400356a95ecSJeff Layton struct nfs4_file *fp, struct inode *inode, 6401f9c00c3aSJeff Layton struct nfs4_ol_stateid *open_stp) 64021da177e4SLinus Torvalds { 6403d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 6404beeca19cSTrond Myklebust struct nfs4_ol_stateid *retstp; 64051da177e4SLinus Torvalds 6406beeca19cSTrond Myklebust mutex_init(&stp->st_mutex); 64074f34bd05SAndrew Elble mutex_lock_nested(&stp->st_mutex, OPEN_STATEID_MUTEX); 6408beeca19cSTrond Myklebust retry: 6409beeca19cSTrond Myklebust spin_lock(&clp->cl_lock); 6410a451b123STrond Myklebust if (nfs4_ol_stateid_unhashed(open_stp)) 6411a451b123STrond Myklebust goto out_close; 6412a451b123STrond Myklebust retstp = find_lock_stateid(lo, open_stp); 6413beeca19cSTrond Myklebust if (retstp) 6414a451b123STrond Myklebust goto out_found; 6415a15dfcd5SElena Reshetova refcount_inc(&stp->st_stid.sc_count); 64163abdb607SJ. Bruce Fields stp->st_stid.sc_type = NFS4_LOCK_STID; 6417b5971afaSKinglong Mee stp->st_stateowner = nfs4_get_stateowner(&lo->lo_owner); 641813cd2184SNeilBrown get_nfs4_file(fp); 641911b9164aSTrond Myklebust stp->st_stid.sc_file = fp; 64200997b173SJ. Bruce Fields stp->st_access_bmap = 0; 64211da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 64224c4cd222SNeilBrown stp->st_openstp = open_stp; 6423a451b123STrond Myklebust spin_lock(&fp->fi_lock); 64243c87b9b7STrond Myklebust list_add(&stp->st_locks, &open_stp->st_locks); 64251c755dc1SJeff Layton list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 64261d31a253STrond Myklebust list_add(&stp->st_perfile, &fp->fi_stateids); 64271d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 6428beeca19cSTrond Myklebust spin_unlock(&clp->cl_lock); 6429a451b123STrond Myklebust return stp; 6430a451b123STrond Myklebust out_found: 6431a451b123STrond Myklebust spin_unlock(&clp->cl_lock); 6432beeca19cSTrond Myklebust if (nfsd4_lock_ol_stateid(retstp) != nfs_ok) { 6433beeca19cSTrond Myklebust nfs4_put_stid(&retstp->st_stid); 6434beeca19cSTrond Myklebust goto retry; 6435beeca19cSTrond Myklebust } 6436beeca19cSTrond Myklebust /* To keep mutex tracking happy */ 6437beeca19cSTrond Myklebust mutex_unlock(&stp->st_mutex); 6438a451b123STrond Myklebust return retstp; 6439a451b123STrond Myklebust out_close: 6440a451b123STrond Myklebust spin_unlock(&clp->cl_lock); 6441a451b123STrond Myklebust mutex_unlock(&stp->st_mutex); 6442a451b123STrond Myklebust return NULL; 64431da177e4SLinus Torvalds } 64441da177e4SLinus Torvalds 6445c53530daSJeff Layton static struct nfs4_ol_stateid * 6446356a95ecSJeff Layton find_or_create_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fi, 6447356a95ecSJeff Layton struct inode *inode, struct nfs4_ol_stateid *ost, 6448356a95ecSJeff Layton bool *new) 6449356a95ecSJeff Layton { 6450356a95ecSJeff Layton struct nfs4_stid *ns = NULL; 6451356a95ecSJeff Layton struct nfs4_ol_stateid *lst; 6452356a95ecSJeff Layton struct nfs4_openowner *oo = openowner(ost->st_stateowner); 6453356a95ecSJeff Layton struct nfs4_client *clp = oo->oo_owner.so_client; 6454356a95ecSJeff Layton 6455beeca19cSTrond Myklebust *new = false; 6456356a95ecSJeff Layton spin_lock(&clp->cl_lock); 6457a451b123STrond Myklebust lst = find_lock_stateid(lo, ost); 6458356a95ecSJeff Layton spin_unlock(&clp->cl_lock); 6459beeca19cSTrond Myklebust if (lst != NULL) { 6460beeca19cSTrond Myklebust if (nfsd4_lock_ol_stateid(lst) == nfs_ok) 6461beeca19cSTrond Myklebust goto out; 6462beeca19cSTrond Myklebust nfs4_put_stid(&lst->st_stid); 6463beeca19cSTrond Myklebust } 6464d19fb70dSKinglong Mee ns = nfs4_alloc_stid(clp, stateid_slab, nfs4_free_lock_stateid); 6465356a95ecSJeff Layton if (ns == NULL) 6466356a95ecSJeff Layton return NULL; 6467356a95ecSJeff Layton 6468beeca19cSTrond Myklebust lst = init_lock_stateid(openlockstateid(ns), lo, fi, inode, ost); 6469beeca19cSTrond Myklebust if (lst == openlockstateid(ns)) 6470356a95ecSJeff Layton *new = true; 6471beeca19cSTrond Myklebust else 6472356a95ecSJeff Layton nfs4_put_stid(ns); 6473beeca19cSTrond Myklebust out: 6474356a95ecSJeff Layton return lst; 6475356a95ecSJeff Layton } 6476c53530daSJeff Layton 6477fd39ca9aSNeilBrown static int 64781da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 64791da177e4SLinus Torvalds { 648087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 6481e7969315SKinglong Mee (length > ~offset))); 64821da177e4SLinus Torvalds } 64831da177e4SLinus Torvalds 6484dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 64850997b173SJ. Bruce Fields { 648611b9164aSTrond Myklebust struct nfs4_file *fp = lock_stp->st_stid.sc_file; 64870997b173SJ. Bruce Fields 64887214e860SJeff Layton lockdep_assert_held(&fp->fi_lock); 64897214e860SJeff Layton 649082c5ff1bSJeff Layton if (test_access(access, lock_stp)) 64910997b173SJ. Bruce Fields return; 649212659651SJeff Layton __nfs4_file_get_access(fp, access); 649382c5ff1bSJeff Layton set_access(access, lock_stp); 64940997b173SJ. Bruce Fields } 64950997b173SJ. Bruce Fields 6496356a95ecSJeff Layton static __be32 6497356a95ecSJeff Layton lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, 6498356a95ecSJeff Layton struct nfs4_ol_stateid *ost, 6499356a95ecSJeff Layton struct nfsd4_lock *lock, 6500dd257933SJeff Layton struct nfs4_ol_stateid **plst, bool *new) 650164a284d0SJ. Bruce Fields { 65025db1c03fSJeff Layton __be32 status; 650311b9164aSTrond Myklebust struct nfs4_file *fi = ost->st_stid.sc_file; 650464a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 650564a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 65062b0143b5SDavid Howells struct inode *inode = d_inode(cstate->current_fh.fh_dentry); 650764a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 6508dd257933SJeff Layton struct nfs4_ol_stateid *lst; 650964a284d0SJ. Bruce Fields unsigned int strhashval; 651064a284d0SJ. Bruce Fields 6511c8623999SKinglong Mee lo = find_lockowner_str(cl, &lock->lk_new_owner); 6512c53530daSJeff Layton if (!lo) { 651376f6c9e1SKinglong Mee strhashval = ownerstr_hashval(&lock->lk_new_owner); 651464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 651564a284d0SJ. Bruce Fields if (lo == NULL) 651664a284d0SJ. Bruce Fields return nfserr_jukebox; 6517c53530daSJeff Layton } else { 6518c53530daSJeff Layton /* with an existing lockowner, seqids must be the same */ 65195db1c03fSJeff Layton status = nfserr_bad_seqid; 6520c53530daSJeff Layton if (!cstate->minorversion && 6521c53530daSJeff Layton lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) 65225db1c03fSJeff Layton goto out; 6523c53530daSJeff Layton } 6524c53530daSJeff Layton 6525dd257933SJeff Layton lst = find_or_create_lock_stateid(lo, fi, inode, ost, new); 6526dd257933SJeff Layton if (lst == NULL) { 65275db1c03fSJeff Layton status = nfserr_jukebox; 65285db1c03fSJeff Layton goto out; 652964a284d0SJ. Bruce Fields } 6530dd257933SJeff Layton 65315db1c03fSJeff Layton status = nfs_ok; 6532dd257933SJeff Layton *plst = lst; 65335db1c03fSJeff Layton out: 65345db1c03fSJeff Layton nfs4_put_stateowner(&lo->lo_owner); 65355db1c03fSJeff Layton return status; 653664a284d0SJ. Bruce Fields } 653764a284d0SJ. Bruce Fields 65381da177e4SLinus Torvalds /* 65391da177e4SLinus Torvalds * LOCK operation 65401da177e4SLinus Torvalds */ 6541b37ad28bSAl Viro __be32 6542ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 6543eb69853dSChristoph Hellwig union nfsd4_op_u *u) 65441da177e4SLinus Torvalds { 6545eb69853dSChristoph Hellwig struct nfsd4_lock *lock = &u->lock; 6546fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 6547fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 65483d0fabd5STrond Myklebust struct nfs4_ol_stateid *lock_stp = NULL; 65490667b1e9STrond Myklebust struct nfs4_ol_stateid *open_stp = NULL; 65507214e860SJeff Layton struct nfs4_file *fp; 6551eb82dd39SJeff Layton struct nfsd_file *nf = NULL; 655276d348faSJeff Layton struct nfsd4_blocked_lock *nbl = NULL; 655321179d81SJeff Layton struct file_lock *file_lock = NULL; 655421179d81SJeff Layton struct file_lock *conflock = NULL; 6555b37ad28bSAl Viro __be32 status = 0; 6556b34f27aaSJ. Bruce Fields int lkflg; 6557b8dd7b9aSAl Viro int err; 65585db1c03fSJeff Layton bool new = false; 655976d348faSJeff Layton unsigned char fl_type; 656076d348faSJeff Layton unsigned int fl_flags = FL_POSIX; 65613320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 65623320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 65631da177e4SLinus Torvalds 65641da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 65651da177e4SLinus Torvalds (long long) lock->lk_offset, 65661da177e4SLinus Torvalds (long long) lock->lk_length); 65671da177e4SLinus Torvalds 65681da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 65691da177e4SLinus Torvalds return nfserr_inval; 65701da177e4SLinus Torvalds 6571ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 65728837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 6573a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 6574a6f6ef2fSAndy Adamson return status; 6575a6f6ef2fSAndy Adamson } 6576a6f6ef2fSAndy Adamson 65771da177e4SLinus Torvalds if (lock->lk_is_new) { 6578684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 6579684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 658076f6c9e1SKinglong Mee memcpy(&lock->lk_new_clientid, 6581684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 6582684e5638SJ. Bruce Fields sizeof(clientid_t)); 6583684e5638SJ. Bruce Fields 65841da177e4SLinus Torvalds status = nfserr_stale_clientid; 65852c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 65861da177e4SLinus Torvalds goto out; 65871da177e4SLinus Torvalds 65881da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 6589c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 65901da177e4SLinus Torvalds lock->lk_new_open_seqid, 65911da177e4SLinus Torvalds &lock->lk_new_open_stateid, 65923320fef1SStanislav Kinsbursky &open_stp, nn); 659337515177SNeilBrown if (status) 65941da177e4SLinus Torvalds goto out; 6595feb9dad5SOleg Drokin mutex_unlock(&open_stp->st_mutex); 6596fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 6597b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 6598684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 659976f6c9e1SKinglong Mee &lock->lk_new_clientid)) 6600b34f27aaSJ. Bruce Fields goto out; 660164a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 66025db1c03fSJeff Layton &lock_stp, &new); 66033d0fabd5STrond Myklebust } else { 6604dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 66051da177e4SLinus Torvalds lock->lk_old_lock_seqid, 66061da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 66073320fef1SStanislav Kinsbursky NFS4_LOCK_STID, &lock_stp, nn); 66083d0fabd5STrond Myklebust } 66091da177e4SLinus Torvalds if (status) 66101da177e4SLinus Torvalds goto out; 6611fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 66121da177e4SLinus Torvalds 6613b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 6614b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 6615b34f27aaSJ. Bruce Fields if (status) 6616b34f27aaSJ. Bruce Fields goto out; 6617b34f27aaSJ. Bruce Fields 66180dd395dcSNeilBrown status = nfserr_grace; 66193320fef1SStanislav Kinsbursky if (locks_in_grace(net) && !lock->lk_reclaim) 66200dd395dcSNeilBrown goto out; 66210dd395dcSNeilBrown status = nfserr_no_grace; 66223320fef1SStanislav Kinsbursky if (!locks_in_grace(net) && lock->lk_reclaim) 66230dd395dcSNeilBrown goto out; 66240dd395dcSNeilBrown 662511b9164aSTrond Myklebust fp = lock_stp->st_stid.sc_file; 66261da177e4SLinus Torvalds switch (lock->lk_type) { 66271da177e4SLinus Torvalds case NFS4_READW_LT: 662876d348faSJeff Layton if (nfsd4_has_session(cstate)) 662976d348faSJeff Layton fl_flags |= FL_SLEEP; 663076d348faSJeff Layton /* Fallthrough */ 663176d348faSJeff Layton case NFS4_READ_LT: 66327214e860SJeff Layton spin_lock(&fp->fi_lock); 6633eb82dd39SJeff Layton nf = find_readable_file_locked(fp); 6634eb82dd39SJeff Layton if (nf) 66350997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 66367214e860SJeff Layton spin_unlock(&fp->fi_lock); 663776d348faSJeff Layton fl_type = F_RDLCK; 66381da177e4SLinus Torvalds break; 66391da177e4SLinus Torvalds case NFS4_WRITEW_LT: 664076d348faSJeff Layton if (nfsd4_has_session(cstate)) 664176d348faSJeff Layton fl_flags |= FL_SLEEP; 664276d348faSJeff Layton /* Fallthrough */ 664376d348faSJeff Layton case NFS4_WRITE_LT: 66447214e860SJeff Layton spin_lock(&fp->fi_lock); 6645eb82dd39SJeff Layton nf = find_writeable_file_locked(fp); 6646eb82dd39SJeff Layton if (nf) 66470997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 66487214e860SJeff Layton spin_unlock(&fp->fi_lock); 664976d348faSJeff Layton fl_type = F_WRLCK; 66501da177e4SLinus Torvalds break; 66511da177e4SLinus Torvalds default: 66521da177e4SLinus Torvalds status = nfserr_inval; 66531da177e4SLinus Torvalds goto out; 66541da177e4SLinus Torvalds } 665576d348faSJeff Layton 6656eb82dd39SJeff Layton if (!nf) { 6657f9d7562fSJ. Bruce Fields status = nfserr_openmode; 6658f9d7562fSJ. Bruce Fields goto out; 6659f9d7562fSJ. Bruce Fields } 6660aef9583bSKinglong Mee 666176d348faSJeff Layton nbl = find_or_allocate_block(lock_sop, &fp->fi_fhandle, nn); 666276d348faSJeff Layton if (!nbl) { 666376d348faSJeff Layton dprintk("NFSD: %s: unable to allocate block!\n", __func__); 666476d348faSJeff Layton status = nfserr_jukebox; 666576d348faSJeff Layton goto out; 666676d348faSJeff Layton } 666776d348faSJeff Layton 666876d348faSJeff Layton file_lock = &nbl->nbl_lock; 666976d348faSJeff Layton file_lock->fl_type = fl_type; 6670aef9583bSKinglong Mee file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(&lock_sop->lo_owner)); 667121179d81SJeff Layton file_lock->fl_pid = current->tgid; 6672eb82dd39SJeff Layton file_lock->fl_file = nf->nf_file; 667376d348faSJeff Layton file_lock->fl_flags = fl_flags; 667421179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 667521179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 667621179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 667721179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 66781da177e4SLinus Torvalds 667921179d81SJeff Layton conflock = locks_alloc_lock(); 668021179d81SJeff Layton if (!conflock) { 668121179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 668221179d81SJeff Layton status = nfserr_jukebox; 668321179d81SJeff Layton goto out; 668421179d81SJeff Layton } 66851da177e4SLinus Torvalds 668676d348faSJeff Layton if (fl_flags & FL_SLEEP) { 668720b7d86fSArnd Bergmann nbl->nbl_time = ktime_get_boottime_seconds(); 66880cc11a61SJeff Layton spin_lock(&nn->blocked_locks_lock); 668976d348faSJeff Layton list_add_tail(&nbl->nbl_list, &lock_sop->lo_blocked); 66907919d0a2SJeff Layton list_add_tail(&nbl->nbl_lru, &nn->blocked_locks_lru); 66910cc11a61SJeff Layton spin_unlock(&nn->blocked_locks_lock); 669276d348faSJeff Layton } 669376d348faSJeff Layton 6694eb82dd39SJeff Layton err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, conflock); 669576d348faSJeff Layton switch (err) { 66961da177e4SLinus Torvalds case 0: /* success! */ 66979767feb2SJeff Layton nfs4_inc_and_copy_stateid(&lock->lk_resp_stateid, &lock_stp->st_stid); 6698b8dd7b9aSAl Viro status = 0; 669903f318caSJ. Bruce Fields if (lock->lk_reclaim) 670003f318caSJ. Bruce Fields nn->somebody_reclaimed = true; 6701eb76b3fdSAndy Adamson break; 670276d348faSJeff Layton case FILE_LOCK_DEFERRED: 670376d348faSJeff Layton nbl = NULL; 670476d348faSJeff Layton /* Fallthrough */ 670576d348faSJeff Layton case -EAGAIN: /* conflock holds conflicting lock */ 6706eb76b3fdSAndy Adamson status = nfserr_denied; 6707eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 670821179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 6709eb76b3fdSAndy Adamson break; 671076d348faSJeff Layton case -EDEADLK: 67111da177e4SLinus Torvalds status = nfserr_deadlock; 6712eb76b3fdSAndy Adamson break; 67131da177e4SLinus Torvalds default: 6714fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 67153e772463SJ. Bruce Fields status = nfserrno(err); 6716eb76b3fdSAndy Adamson break; 67171da177e4SLinus Torvalds } 67181da177e4SLinus Torvalds out: 671976d348faSJeff Layton if (nbl) { 672076d348faSJeff Layton /* dequeue it if we queued it before */ 672176d348faSJeff Layton if (fl_flags & FL_SLEEP) { 67220cc11a61SJeff Layton spin_lock(&nn->blocked_locks_lock); 672376d348faSJeff Layton list_del_init(&nbl->nbl_list); 67247919d0a2SJeff Layton list_del_init(&nbl->nbl_lru); 67250cc11a61SJeff Layton spin_unlock(&nn->blocked_locks_lock); 672676d348faSJeff Layton } 672776d348faSJeff Layton free_blocked_lock(nbl); 672876d348faSJeff Layton } 6729eb82dd39SJeff Layton if (nf) 6730eb82dd39SJeff Layton nfsd_file_put(nf); 67315db1c03fSJeff Layton if (lock_stp) { 67325db1c03fSJeff Layton /* Bump seqid manually if the 4.0 replay owner is openowner */ 67335db1c03fSJeff Layton if (cstate->replay_owner && 67345db1c03fSJeff Layton cstate->replay_owner != &lock_sop->lo_owner && 67355db1c03fSJeff Layton seqid_mutating_err(ntohl(status))) 67365db1c03fSJeff Layton lock_sop->lo_owner.so_seqid++; 67375db1c03fSJeff Layton 67385db1c03fSJeff Layton /* 67395db1c03fSJeff Layton * If this is a new, never-before-used stateid, and we are 67405db1c03fSJeff Layton * returning an error, then just go ahead and release it. 67415db1c03fSJeff Layton */ 674225020720SJ. Bruce Fields if (status && new) 67435db1c03fSJeff Layton release_lock_stateid(lock_stp); 6744beeca19cSTrond Myklebust 6745beeca19cSTrond Myklebust mutex_unlock(&lock_stp->st_mutex); 67465db1c03fSJeff Layton 67473d0fabd5STrond Myklebust nfs4_put_stid(&lock_stp->st_stid); 67485db1c03fSJeff Layton } 67490667b1e9STrond Myklebust if (open_stp) 67500667b1e9STrond Myklebust nfs4_put_stid(&open_stp->st_stid); 67519411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 675221179d81SJeff Layton if (conflock) 675321179d81SJeff Layton locks_free_lock(conflock); 67541da177e4SLinus Torvalds return status; 67551da177e4SLinus Torvalds } 67561da177e4SLinus Torvalds 67571da177e4SLinus Torvalds /* 675855ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 675955ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 676055ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 676155ef1274SJ. Bruce Fields * inode operation.) 676255ef1274SJ. Bruce Fields */ 676304da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 676455ef1274SJ. Bruce Fields { 67656b556ca2SJeff Layton struct nfsd_file *nf; 67666b556ca2SJeff Layton __be32 err = nfsd_file_acquire(rqstp, fhp, NFSD_MAY_READ, &nf); 676704da6e9dSAl Viro if (!err) { 67686b556ca2SJeff Layton err = nfserrno(vfs_test_lock(nf->nf_file, lock)); 67696b556ca2SJeff Layton nfsd_file_put(nf); 677004da6e9dSAl Viro } 677155ef1274SJ. Bruce Fields return err; 677255ef1274SJ. Bruce Fields } 677355ef1274SJ. Bruce Fields 677455ef1274SJ. Bruce Fields /* 67751da177e4SLinus Torvalds * LOCKT operation 67761da177e4SLinus Torvalds */ 6777b37ad28bSAl Viro __be32 6778ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 6779eb69853dSChristoph Hellwig union nfsd4_op_u *u) 67801da177e4SLinus Torvalds { 6781eb69853dSChristoph Hellwig struct nfsd4_lockt *lockt = &u->lockt; 678221179d81SJeff Layton struct file_lock *file_lock = NULL; 67835db1c03fSJeff Layton struct nfs4_lockowner *lo = NULL; 6784b37ad28bSAl Viro __be32 status; 67857f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 67861da177e4SLinus Torvalds 67875ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 67881da177e4SLinus Torvalds return nfserr_grace; 67891da177e4SLinus Torvalds 67901da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 67911da177e4SLinus Torvalds return nfserr_inval; 67921da177e4SLinus Torvalds 67939b2ef62bSJ. Bruce Fields if (!nfsd4_has_session(cstate)) { 6794b7342204SOlga Kornievskaia status = lookup_clientid(&lockt->lt_clientid, cstate, nn, 6795b7342204SOlga Kornievskaia false); 67969b2ef62bSJ. Bruce Fields if (status) 67971da177e4SLinus Torvalds goto out; 67989b2ef62bSJ. Bruce Fields } 67991da177e4SLinus Torvalds 680075c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 68011da177e4SLinus Torvalds goto out; 68021da177e4SLinus Torvalds 680321179d81SJeff Layton file_lock = locks_alloc_lock(); 680421179d81SJeff Layton if (!file_lock) { 680521179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 680621179d81SJeff Layton status = nfserr_jukebox; 680721179d81SJeff Layton goto out; 680821179d81SJeff Layton } 68096cd90662SKinglong Mee 68101da177e4SLinus Torvalds switch (lockt->lt_type) { 68111da177e4SLinus Torvalds case NFS4_READ_LT: 68121da177e4SLinus Torvalds case NFS4_READW_LT: 681321179d81SJeff Layton file_lock->fl_type = F_RDLCK; 68141da177e4SLinus Torvalds break; 68151da177e4SLinus Torvalds case NFS4_WRITE_LT: 68161da177e4SLinus Torvalds case NFS4_WRITEW_LT: 681721179d81SJeff Layton file_lock->fl_type = F_WRLCK; 68181da177e4SLinus Torvalds break; 68191da177e4SLinus Torvalds default: 68202fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 68211da177e4SLinus Torvalds status = nfserr_inval; 68221da177e4SLinus Torvalds goto out; 68231da177e4SLinus Torvalds } 68241da177e4SLinus Torvalds 6825c8623999SKinglong Mee lo = find_lockowner_str(cstate->clp, &lockt->lt_owner); 6826fe0750e5SJ. Bruce Fields if (lo) 682721179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 682821179d81SJeff Layton file_lock->fl_pid = current->tgid; 682921179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 68301da177e4SLinus Torvalds 683121179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 683221179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 68331da177e4SLinus Torvalds 683421179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 68351da177e4SLinus Torvalds 683621179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 683704da6e9dSAl Viro if (status) 6838fd85b817SMarc Eshel goto out; 683904da6e9dSAl Viro 684021179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 68411da177e4SLinus Torvalds status = nfserr_denied; 684221179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 68431da177e4SLinus Torvalds } 68441da177e4SLinus Torvalds out: 68455db1c03fSJeff Layton if (lo) 68465db1c03fSJeff Layton nfs4_put_stateowner(&lo->lo_owner); 684721179d81SJeff Layton if (file_lock) 684821179d81SJeff Layton locks_free_lock(file_lock); 68491da177e4SLinus Torvalds return status; 68501da177e4SLinus Torvalds } 68511da177e4SLinus Torvalds 6852b37ad28bSAl Viro __be32 6853ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 6854eb69853dSChristoph Hellwig union nfsd4_op_u *u) 68551da177e4SLinus Torvalds { 6856eb69853dSChristoph Hellwig struct nfsd4_locku *locku = &u->locku; 6857dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 6858eb82dd39SJeff Layton struct nfsd_file *nf = NULL; 685921179d81SJeff Layton struct file_lock *file_lock = NULL; 6860b37ad28bSAl Viro __be32 status; 6861b8dd7b9aSAl Viro int err; 68623320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 68631da177e4SLinus Torvalds 68641da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 68651da177e4SLinus Torvalds (long long) locku->lu_offset, 68661da177e4SLinus Torvalds (long long) locku->lu_length); 68671da177e4SLinus Torvalds 68681da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 68691da177e4SLinus Torvalds return nfserr_inval; 68701da177e4SLinus Torvalds 68719072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 68723320fef1SStanislav Kinsbursky &locku->lu_stateid, NFS4_LOCK_STID, 68733320fef1SStanislav Kinsbursky &stp, nn); 68749072d5c6SJ. Bruce Fields if (status) 68751da177e4SLinus Torvalds goto out; 6876eb82dd39SJeff Layton nf = find_any_file(stp->st_stid.sc_file); 6877eb82dd39SJeff Layton if (!nf) { 6878f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 6879858cc573STrond Myklebust goto put_stateid; 6880f9d7562fSJ. Bruce Fields } 688121179d81SJeff Layton file_lock = locks_alloc_lock(); 688221179d81SJeff Layton if (!file_lock) { 688321179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 688421179d81SJeff Layton status = nfserr_jukebox; 6885eb82dd39SJeff Layton goto put_file; 688621179d81SJeff Layton } 68876cd90662SKinglong Mee 688821179d81SJeff Layton file_lock->fl_type = F_UNLCK; 6889aef9583bSKinglong Mee file_lock->fl_owner = (fl_owner_t)lockowner(nfs4_get_stateowner(stp->st_stateowner)); 689021179d81SJeff Layton file_lock->fl_pid = current->tgid; 6891eb82dd39SJeff Layton file_lock->fl_file = nf->nf_file; 689221179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 689321179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 689421179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 68951da177e4SLinus Torvalds 689621179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 689721179d81SJeff Layton locku->lu_length); 689821179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 68991da177e4SLinus Torvalds 6900eb82dd39SJeff Layton err = vfs_lock_file(nf->nf_file, F_SETLK, file_lock, NULL); 6901b8dd7b9aSAl Viro if (err) { 6902fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 69031da177e4SLinus Torvalds goto out_nfserr; 69041da177e4SLinus Torvalds } 69059767feb2SJeff Layton nfs4_inc_and_copy_stateid(&locku->lu_stateid, &stp->st_stid); 6906eb82dd39SJeff Layton put_file: 6907eb82dd39SJeff Layton nfsd_file_put(nf); 6908858cc573STrond Myklebust put_stateid: 6909feb9dad5SOleg Drokin mutex_unlock(&stp->st_mutex); 6910858cc573STrond Myklebust nfs4_put_stid(&stp->st_stid); 69111da177e4SLinus Torvalds out: 69129411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 691321179d81SJeff Layton if (file_lock) 691421179d81SJeff Layton locks_free_lock(file_lock); 69151da177e4SLinus Torvalds return status; 69161da177e4SLinus Torvalds 69171da177e4SLinus Torvalds out_nfserr: 6918b8dd7b9aSAl Viro status = nfserrno(err); 6919eb82dd39SJeff Layton goto put_file; 69201da177e4SLinus Torvalds } 69211da177e4SLinus Torvalds 69221da177e4SLinus Torvalds /* 69231da177e4SLinus Torvalds * returns 6924f9c00c3aSJeff Layton * true: locks held by lockowner 6925f9c00c3aSJeff Layton * false: no locks held by lockowner 69261da177e4SLinus Torvalds */ 6927f9c00c3aSJeff Layton static bool 6928f9c00c3aSJeff Layton check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner) 69291da177e4SLinus Torvalds { 6930bd61e0a9SJeff Layton struct file_lock *fl; 6931f9c00c3aSJeff Layton int status = false; 6932eb82dd39SJeff Layton struct nfsd_file *nf = find_any_file(fp); 6933f9c00c3aSJeff Layton struct inode *inode; 6934bd61e0a9SJeff Layton struct file_lock_context *flctx; 6935f9c00c3aSJeff Layton 6936eb82dd39SJeff Layton if (!nf) { 6937f9c00c3aSJeff Layton /* Any valid lock stateid should have some sort of access */ 6938f9c00c3aSJeff Layton WARN_ON_ONCE(1); 6939f9c00c3aSJeff Layton return status; 6940f9c00c3aSJeff Layton } 6941f9c00c3aSJeff Layton 6942eb82dd39SJeff Layton inode = locks_inode(nf->nf_file); 6943bd61e0a9SJeff Layton flctx = inode->i_flctx; 69441da177e4SLinus Torvalds 6945bd61e0a9SJeff Layton if (flctx && !list_empty_careful(&flctx->flc_posix)) { 69466109c850SJeff Layton spin_lock(&flctx->flc_lock); 6947bd61e0a9SJeff Layton list_for_each_entry(fl, &flctx->flc_posix, fl_list) { 6948bd61e0a9SJeff Layton if (fl->fl_owner == (fl_owner_t)lowner) { 6949f9c00c3aSJeff Layton status = true; 6950f9c00c3aSJeff Layton break; 69511da177e4SLinus Torvalds } 6952796dadfdSJ. Bruce Fields } 69536109c850SJeff Layton spin_unlock(&flctx->flc_lock); 6954bd61e0a9SJeff Layton } 6955eb82dd39SJeff Layton nfsd_file_put(nf); 69561da177e4SLinus Torvalds return status; 69571da177e4SLinus Torvalds } 69581da177e4SLinus Torvalds 6959b37ad28bSAl Viro __be32 6960b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 6961b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 6962eb69853dSChristoph Hellwig union nfsd4_op_u *u) 69631da177e4SLinus Torvalds { 6964eb69853dSChristoph Hellwig struct nfsd4_release_lockowner *rlockowner = &u->release_lockowner; 69651da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 6966882e9d25SJeff Layton struct nfs4_stateowner *sop; 6967882e9d25SJeff Layton struct nfs4_lockowner *lo = NULL; 6968dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 69691da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 6970d4f0489fSTrond Myklebust unsigned int hashval = ownerstr_hashval(owner); 6971b37ad28bSAl Viro __be32 status; 69727f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 6973c58c6610STrond Myklebust struct nfs4_client *clp; 697488584818SChuck Lever LIST_HEAD (reaplist); 69751da177e4SLinus Torvalds 69761da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 69771da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 69781da177e4SLinus Torvalds 6979b7342204SOlga Kornievskaia status = lookup_clientid(clid, cstate, nn, false); 69809b2ef62bSJ. Bruce Fields if (status) 698151f5e783STrond Myklebust return status; 69829b2ef62bSJ. Bruce Fields 6983d4f0489fSTrond Myklebust clp = cstate->clp; 6984fd44907cSJeff Layton /* Find the matching lock stateowner */ 6985d4f0489fSTrond Myklebust spin_lock(&clp->cl_lock); 6986882e9d25SJeff Layton list_for_each_entry(sop, &clp->cl_ownerstr_hashtbl[hashval], 6987d4f0489fSTrond Myklebust so_strhash) { 6988882e9d25SJeff Layton 6989882e9d25SJeff Layton if (sop->so_is_open_owner || !same_owner_str(sop, owner)) 699016bfdaafSJ. Bruce Fields continue; 6991882e9d25SJeff Layton 6992882e9d25SJeff Layton /* see if there are still any locks associated with it */ 6993882e9d25SJeff Layton lo = lockowner(sop); 6994882e9d25SJeff Layton list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { 6995882e9d25SJeff Layton if (check_for_locks(stp->st_stid.sc_file, lo)) { 6996882e9d25SJeff Layton status = nfserr_locks_held; 6997882e9d25SJeff Layton spin_unlock(&clp->cl_lock); 699851f5e783STrond Myklebust return status; 6999882e9d25SJeff Layton } 7000882e9d25SJeff Layton } 7001882e9d25SJeff Layton 7002b5971afaSKinglong Mee nfs4_get_stateowner(sop); 7003fd44907cSJeff Layton break; 7004fd44907cSJeff Layton } 700588584818SChuck Lever if (!lo) { 7006d4f0489fSTrond Myklebust spin_unlock(&clp->cl_lock); 700788584818SChuck Lever return status; 700888584818SChuck Lever } 700988584818SChuck Lever 701088584818SChuck Lever unhash_lockowner_locked(lo); 701188584818SChuck Lever while (!list_empty(&lo->lo_owner.so_stateids)) { 701288584818SChuck Lever stp = list_first_entry(&lo->lo_owner.so_stateids, 701388584818SChuck Lever struct nfs4_ol_stateid, 701488584818SChuck Lever st_perstateowner); 701588584818SChuck Lever WARN_ON(!unhash_lock_stateid(stp)); 701688584818SChuck Lever put_ol_stateid_locked(stp, &reaplist); 701788584818SChuck Lever } 701888584818SChuck Lever spin_unlock(&clp->cl_lock); 701988584818SChuck Lever free_ol_stateid_reaplist(&reaplist); 702068ef3bc3SJeff Layton remove_blocked_locks(lo); 702188584818SChuck Lever nfs4_put_stateowner(&lo->lo_owner); 702288584818SChuck Lever 70231da177e4SLinus Torvalds return status; 70241da177e4SLinus Torvalds } 70251da177e4SLinus Torvalds 70261da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 7027a55370a3SNeilBrown alloc_reclaim(void) 70281da177e4SLinus Torvalds { 7029a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 70301da177e4SLinus Torvalds } 70311da177e4SLinus Torvalds 70320ce0c2b5SJeff Layton bool 70336b189105SScott Mayhew nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn) 7034c7b9a459SNeilBrown { 70350ce0c2b5SJeff Layton struct nfs4_client_reclaim *crp; 7036c7b9a459SNeilBrown 703752e19c09SStanislav Kinsbursky crp = nfsd4_find_reclaim_client(name, nn); 70380ce0c2b5SJeff Layton return (crp && crp->cr_clp); 7039c7b9a459SNeilBrown } 7040c7b9a459SNeilBrown 70411da177e4SLinus Torvalds /* 70421da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 70436b189105SScott Mayhew * 70446b189105SScott Mayhew * The caller is responsible for freeing name.data if NULL is returned (it 70456b189105SScott Mayhew * will be freed in nfs4_remove_reclaim_record in the normal case). 70461da177e4SLinus Torvalds */ 7047772a9bbbSJeff Layton struct nfs4_client_reclaim * 70486ee95d1cSScott Mayhew nfs4_client_to_reclaim(struct xdr_netobj name, struct xdr_netobj princhash, 70496ee95d1cSScott Mayhew struct nfsd_net *nn) 70501da177e4SLinus Torvalds { 70511da177e4SLinus Torvalds unsigned int strhashval; 7052772a9bbbSJeff Layton struct nfs4_client_reclaim *crp; 70531da177e4SLinus Torvalds 7054dd5e3fbcSChuck Lever trace_nfsd_clid_reclaim(nn, name.len, name.data); 7055a55370a3SNeilBrown crp = alloc_reclaim(); 7056772a9bbbSJeff Layton if (crp) { 7057a55370a3SNeilBrown strhashval = clientstr_hashval(name); 70581da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 705952e19c09SStanislav Kinsbursky list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); 70606b189105SScott Mayhew crp->cr_name.data = name.data; 70616b189105SScott Mayhew crp->cr_name.len = name.len; 70626ee95d1cSScott Mayhew crp->cr_princhash.data = princhash.data; 70636ee95d1cSScott Mayhew crp->cr_princhash.len = princhash.len; 70640ce0c2b5SJeff Layton crp->cr_clp = NULL; 706552e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size++; 7066772a9bbbSJeff Layton } 7067772a9bbbSJeff Layton return crp; 70681da177e4SLinus Torvalds } 70691da177e4SLinus Torvalds 70702a4317c5SJeff Layton void 707152e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) 7072ce30e539SJeff Layton { 7073ce30e539SJeff Layton list_del(&crp->cr_strhash); 70746b189105SScott Mayhew kfree(crp->cr_name.data); 70756ee95d1cSScott Mayhew kfree(crp->cr_princhash.data); 7076ce30e539SJeff Layton kfree(crp); 707752e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size--; 7078ce30e539SJeff Layton } 7079ce30e539SJeff Layton 7080ce30e539SJeff Layton void 708152e19c09SStanislav Kinsbursky nfs4_release_reclaim(struct nfsd_net *nn) 70821da177e4SLinus Torvalds { 70831da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 70841da177e4SLinus Torvalds int i; 70851da177e4SLinus Torvalds 70861da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 708752e19c09SStanislav Kinsbursky while (!list_empty(&nn->reclaim_str_hashtbl[i])) { 708852e19c09SStanislav Kinsbursky crp = list_entry(nn->reclaim_str_hashtbl[i].next, 70891da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 709052e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(crp, nn); 70911da177e4SLinus Torvalds } 70921da177e4SLinus Torvalds } 7093063b0fb9SJ. Bruce Fields WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); 70941da177e4SLinus Torvalds } 70951da177e4SLinus Torvalds 70961da177e4SLinus Torvalds /* 70971da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 70982a4317c5SJeff Layton struct nfs4_client_reclaim * 70996b189105SScott Mayhew nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn) 71001da177e4SLinus Torvalds { 71011da177e4SLinus Torvalds unsigned int strhashval; 71021da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 71031da177e4SLinus Torvalds 7104dd5e3fbcSChuck Lever trace_nfsd_clid_find(nn, name.len, name.data); 71051da177e4SLinus Torvalds 71066b189105SScott Mayhew strhashval = clientstr_hashval(name); 710752e19c09SStanislav Kinsbursky list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { 71086b189105SScott Mayhew if (compare_blob(&crp->cr_name, &name) == 0) { 71091da177e4SLinus Torvalds return crp; 71101da177e4SLinus Torvalds } 71111da177e4SLinus Torvalds } 71121da177e4SLinus Torvalds return NULL; 71131da177e4SLinus Torvalds } 71141da177e4SLinus Torvalds 71151da177e4SLinus Torvalds /* 71161da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 71171da177e4SLinus Torvalds */ 7118b37ad28bSAl Viro __be32 71190fe492dbSTrond Myklebust nfs4_check_open_reclaim(clientid_t *clid, 71200fe492dbSTrond Myklebust struct nfsd4_compound_state *cstate, 71210fe492dbSTrond Myklebust struct nfsd_net *nn) 71221da177e4SLinus Torvalds { 71230fe492dbSTrond Myklebust __be32 status; 7124a52d726bSJeff Layton 7125a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 7126b7342204SOlga Kornievskaia status = lookup_clientid(clid, cstate, nn, false); 71270fe492dbSTrond Myklebust if (status) 7128a52d726bSJeff Layton return nfserr_reclaim_bad; 7129a52d726bSJeff Layton 71303b3e7b72SJeff Layton if (test_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, &cstate->clp->cl_flags)) 71313b3e7b72SJeff Layton return nfserr_no_grace; 71323b3e7b72SJeff Layton 71330fe492dbSTrond Myklebust if (nfsd4_client_record_check(cstate->clp)) 71340fe492dbSTrond Myklebust return nfserr_reclaim_bad; 71350fe492dbSTrond Myklebust 71360fe492dbSTrond Myklebust return nfs_ok; 71371da177e4SLinus Torvalds } 71381da177e4SLinus Torvalds 713965178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 7140016200c3SJeff Layton static inline void 7141016200c3SJeff Layton put_client(struct nfs4_client *clp) 7142016200c3SJeff Layton { 714314ed14ccSJ. Bruce Fields atomic_dec(&clp->cl_rpc_users); 7144016200c3SJeff Layton } 7145016200c3SJeff Layton 7146285abdeeSJeff Layton static struct nfs4_client * 7147285abdeeSJeff Layton nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) 7148285abdeeSJeff Layton { 7149285abdeeSJeff Layton struct nfs4_client *clp; 7150285abdeeSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7151285abdeeSJeff Layton nfsd_net_id); 7152285abdeeSJeff Layton 7153285abdeeSJeff Layton if (!nfsd_netns_ready(nn)) 7154285abdeeSJeff Layton return NULL; 7155285abdeeSJeff Layton 7156285abdeeSJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) { 7157285abdeeSJeff Layton if (memcmp(&clp->cl_addr, addr, addr_size) == 0) 7158285abdeeSJeff Layton return clp; 7159285abdeeSJeff Layton } 7160285abdeeSJeff Layton return NULL; 7161285abdeeSJeff Layton } 7162285abdeeSJeff Layton 71637ec0e36fSJeff Layton u64 7164285abdeeSJeff Layton nfsd_inject_print_clients(void) 71657ec0e36fSJeff Layton { 71667ec0e36fSJeff Layton struct nfs4_client *clp; 71677ec0e36fSJeff Layton u64 count = 0; 71687ec0e36fSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 71697ec0e36fSJeff Layton nfsd_net_id); 71707ec0e36fSJeff Layton char buf[INET6_ADDRSTRLEN]; 71717ec0e36fSJeff Layton 71727ec0e36fSJeff Layton if (!nfsd_netns_ready(nn)) 71737ec0e36fSJeff Layton return 0; 71747ec0e36fSJeff Layton 71757ec0e36fSJeff Layton spin_lock(&nn->client_lock); 71767ec0e36fSJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) { 71777ec0e36fSJeff Layton rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); 71787ec0e36fSJeff Layton pr_info("NFS Client: %s\n", buf); 71797ec0e36fSJeff Layton ++count; 71807ec0e36fSJeff Layton } 71817ec0e36fSJeff Layton spin_unlock(&nn->client_lock); 71827ec0e36fSJeff Layton 71837ec0e36fSJeff Layton return count; 71847ec0e36fSJeff Layton } 718565178db4SBryan Schumaker 7186a0926d15SJeff Layton u64 7187285abdeeSJeff Layton nfsd_inject_forget_client(struct sockaddr_storage *addr, size_t addr_size) 7188a0926d15SJeff Layton { 7189a0926d15SJeff Layton u64 count = 0; 7190a0926d15SJeff Layton struct nfs4_client *clp; 7191a0926d15SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7192a0926d15SJeff Layton nfsd_net_id); 7193a0926d15SJeff Layton 7194a0926d15SJeff Layton if (!nfsd_netns_ready(nn)) 7195a0926d15SJeff Layton return count; 7196a0926d15SJeff Layton 7197a0926d15SJeff Layton spin_lock(&nn->client_lock); 7198a0926d15SJeff Layton clp = nfsd_find_client(addr, addr_size); 7199a0926d15SJeff Layton if (clp) { 7200a0926d15SJeff Layton if (mark_client_expired_locked(clp) == nfs_ok) 7201a0926d15SJeff Layton ++count; 7202a0926d15SJeff Layton else 7203a0926d15SJeff Layton clp = NULL; 7204a0926d15SJeff Layton } 7205a0926d15SJeff Layton spin_unlock(&nn->client_lock); 7206a0926d15SJeff Layton 7207a0926d15SJeff Layton if (clp) 7208a0926d15SJeff Layton expire_client(clp); 7209a0926d15SJeff Layton 7210a0926d15SJeff Layton return count; 7211a0926d15SJeff Layton } 7212a0926d15SJeff Layton 721369fc9edfSJeff Layton u64 7214285abdeeSJeff Layton nfsd_inject_forget_clients(u64 max) 721569fc9edfSJeff Layton { 721669fc9edfSJeff Layton u64 count = 0; 721769fc9edfSJeff Layton struct nfs4_client *clp, *next; 721869fc9edfSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 721969fc9edfSJeff Layton nfsd_net_id); 722069fc9edfSJeff Layton LIST_HEAD(reaplist); 722169fc9edfSJeff Layton 722269fc9edfSJeff Layton if (!nfsd_netns_ready(nn)) 722369fc9edfSJeff Layton return count; 722469fc9edfSJeff Layton 722569fc9edfSJeff Layton spin_lock(&nn->client_lock); 722669fc9edfSJeff Layton list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { 722769fc9edfSJeff Layton if (mark_client_expired_locked(clp) == nfs_ok) { 722869fc9edfSJeff Layton list_add(&clp->cl_lru, &reaplist); 722969fc9edfSJeff Layton if (max != 0 && ++count >= max) 723069fc9edfSJeff Layton break; 723169fc9edfSJeff Layton } 723269fc9edfSJeff Layton } 723369fc9edfSJeff Layton spin_unlock(&nn->client_lock); 723469fc9edfSJeff Layton 723569fc9edfSJeff Layton list_for_each_entry_safe(clp, next, &reaplist, cl_lru) 723669fc9edfSJeff Layton expire_client(clp); 723769fc9edfSJeff Layton 723869fc9edfSJeff Layton return count; 723969fc9edfSJeff Layton } 724069fc9edfSJeff Layton 7241184c1847SBryan Schumaker static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, 7242184c1847SBryan Schumaker const char *type) 7243184c1847SBryan Schumaker { 7244184c1847SBryan Schumaker char buf[INET6_ADDRSTRLEN]; 72450a5c33e2SBryan Schumaker rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); 7246184c1847SBryan Schumaker printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); 7247184c1847SBryan Schumaker } 7248184c1847SBryan Schumaker 7249016200c3SJeff Layton static void 7250016200c3SJeff Layton nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst, 7251016200c3SJeff Layton struct list_head *collect) 7252016200c3SJeff Layton { 7253016200c3SJeff Layton struct nfs4_client *clp = lst->st_stid.sc_client; 7254016200c3SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7255016200c3SJeff Layton nfsd_net_id); 7256016200c3SJeff Layton 7257016200c3SJeff Layton if (!collect) 7258016200c3SJeff Layton return; 7259016200c3SJeff Layton 7260016200c3SJeff Layton lockdep_assert_held(&nn->client_lock); 726114ed14ccSJ. Bruce Fields atomic_inc(&clp->cl_rpc_users); 7262016200c3SJeff Layton list_add(&lst->st_locks, collect); 7263016200c3SJeff Layton } 7264016200c3SJeff Layton 72653c87b9b7STrond Myklebust static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, 72663738d50eSJeff Layton struct list_head *collect, 7267e8568739SJeff Layton bool (*func)(struct nfs4_ol_stateid *)) 7268fc29171fSBryan Schumaker { 7269fc29171fSBryan Schumaker struct nfs4_openowner *oop; 7270fc29171fSBryan Schumaker struct nfs4_ol_stateid *stp, *st_next; 72713c87b9b7STrond Myklebust struct nfs4_ol_stateid *lst, *lst_next; 7272fc29171fSBryan Schumaker u64 count = 0; 7273fc29171fSBryan Schumaker 7274016200c3SJeff Layton spin_lock(&clp->cl_lock); 7275fc29171fSBryan Schumaker list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { 72763c87b9b7STrond Myklebust list_for_each_entry_safe(stp, st_next, 72773c87b9b7STrond Myklebust &oop->oo_owner.so_stateids, st_perstateowner) { 72783c87b9b7STrond Myklebust list_for_each_entry_safe(lst, lst_next, 72793c87b9b7STrond Myklebust &stp->st_locks, st_locks) { 72803738d50eSJeff Layton if (func) { 7281e8568739SJeff Layton if (func(lst)) 7282016200c3SJeff Layton nfsd_inject_add_lock_to_list(lst, 72833738d50eSJeff Layton collect); 72843738d50eSJeff Layton } 7285016200c3SJeff Layton ++count; 7286016200c3SJeff Layton /* 7287016200c3SJeff Layton * Despite the fact that these functions deal 7288016200c3SJeff Layton * with 64-bit integers for "count", we must 7289016200c3SJeff Layton * ensure that it doesn't blow up the 729014ed14ccSJ. Bruce Fields * clp->cl_rpc_users. Throw a warning if we 7291016200c3SJeff Layton * start to approach INT_MAX here. 7292016200c3SJeff Layton */ 7293016200c3SJeff Layton WARN_ON_ONCE(count == (INT_MAX / 2)); 7294016200c3SJeff Layton if (count == max) 7295016200c3SJeff Layton goto out; 7296fc29171fSBryan Schumaker } 7297fc29171fSBryan Schumaker } 7298fc29171fSBryan Schumaker } 7299016200c3SJeff Layton out: 7300016200c3SJeff Layton spin_unlock(&clp->cl_lock); 7301fc29171fSBryan Schumaker 7302fc29171fSBryan Schumaker return count; 7303fc29171fSBryan Schumaker } 7304fc29171fSBryan Schumaker 7305016200c3SJeff Layton static u64 7306016200c3SJeff Layton nfsd_collect_client_locks(struct nfs4_client *clp, struct list_head *collect, 7307016200c3SJeff Layton u64 max) 7308fc29171fSBryan Schumaker { 7309016200c3SJeff Layton return nfsd_foreach_client_lock(clp, max, collect, unhash_lock_stateid); 7310fc29171fSBryan Schumaker } 7311fc29171fSBryan Schumaker 7312016200c3SJeff Layton static u64 7313016200c3SJeff Layton nfsd_print_client_locks(struct nfs4_client *clp) 7314184c1847SBryan Schumaker { 7315016200c3SJeff Layton u64 count = nfsd_foreach_client_lock(clp, 0, NULL, NULL); 7316184c1847SBryan Schumaker nfsd_print_count(clp, count, "locked files"); 7317184c1847SBryan Schumaker return count; 7318184c1847SBryan Schumaker } 7319184c1847SBryan Schumaker 7320016200c3SJeff Layton u64 7321285abdeeSJeff Layton nfsd_inject_print_locks(void) 7322016200c3SJeff Layton { 7323016200c3SJeff Layton struct nfs4_client *clp; 7324016200c3SJeff Layton u64 count = 0; 7325016200c3SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7326016200c3SJeff Layton nfsd_net_id); 7327016200c3SJeff Layton 7328016200c3SJeff Layton if (!nfsd_netns_ready(nn)) 7329016200c3SJeff Layton return 0; 7330016200c3SJeff Layton 7331016200c3SJeff Layton spin_lock(&nn->client_lock); 7332016200c3SJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) 7333016200c3SJeff Layton count += nfsd_print_client_locks(clp); 7334016200c3SJeff Layton spin_unlock(&nn->client_lock); 7335016200c3SJeff Layton 7336016200c3SJeff Layton return count; 7337016200c3SJeff Layton } 7338016200c3SJeff Layton 7339016200c3SJeff Layton static void 7340016200c3SJeff Layton nfsd_reap_locks(struct list_head *reaplist) 7341016200c3SJeff Layton { 7342016200c3SJeff Layton struct nfs4_client *clp; 7343016200c3SJeff Layton struct nfs4_ol_stateid *stp, *next; 7344016200c3SJeff Layton 7345016200c3SJeff Layton list_for_each_entry_safe(stp, next, reaplist, st_locks) { 7346016200c3SJeff Layton list_del_init(&stp->st_locks); 7347016200c3SJeff Layton clp = stp->st_stid.sc_client; 7348016200c3SJeff Layton nfs4_put_stid(&stp->st_stid); 7349016200c3SJeff Layton put_client(clp); 7350016200c3SJeff Layton } 7351016200c3SJeff Layton } 7352016200c3SJeff Layton 7353016200c3SJeff Layton u64 7354285abdeeSJeff Layton nfsd_inject_forget_client_locks(struct sockaddr_storage *addr, size_t addr_size) 7355016200c3SJeff Layton { 7356016200c3SJeff Layton unsigned int count = 0; 7357016200c3SJeff Layton struct nfs4_client *clp; 7358016200c3SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7359016200c3SJeff Layton nfsd_net_id); 7360016200c3SJeff Layton LIST_HEAD(reaplist); 7361016200c3SJeff Layton 7362016200c3SJeff Layton if (!nfsd_netns_ready(nn)) 7363016200c3SJeff Layton return count; 7364016200c3SJeff Layton 7365016200c3SJeff Layton spin_lock(&nn->client_lock); 7366016200c3SJeff Layton clp = nfsd_find_client(addr, addr_size); 7367016200c3SJeff Layton if (clp) 7368016200c3SJeff Layton count = nfsd_collect_client_locks(clp, &reaplist, 0); 7369016200c3SJeff Layton spin_unlock(&nn->client_lock); 7370016200c3SJeff Layton nfsd_reap_locks(&reaplist); 7371016200c3SJeff Layton return count; 7372016200c3SJeff Layton } 7373016200c3SJeff Layton 7374016200c3SJeff Layton u64 7375285abdeeSJeff Layton nfsd_inject_forget_locks(u64 max) 7376016200c3SJeff Layton { 7377016200c3SJeff Layton u64 count = 0; 7378016200c3SJeff Layton struct nfs4_client *clp; 7379016200c3SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 7380016200c3SJeff Layton nfsd_net_id); 7381016200c3SJeff Layton LIST_HEAD(reaplist); 7382016200c3SJeff Layton 7383016200c3SJeff Layton if (!nfsd_netns_ready(nn)) 7384016200c3SJeff Layton return count; 7385016200c3SJeff Layton 7386016200c3SJeff Layton spin_lock(&nn->client_lock); 7387016200c3SJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) { 7388016200c3SJeff Layton count += nfsd_collect_client_locks(clp, &reaplist, max - count); 7389016200c3SJeff Layton if (max != 0 && count >= max) 7390016200c3SJeff Layton break; 7391016200c3SJeff Layton } 7392016200c3SJeff Layton spin_unlock(&nn->client_lock); 7393016200c3SJeff Layton nfsd_reap_locks(&reaplist); 7394016200c3SJeff Layton return count; 7395016200c3SJeff Layton } 7396016200c3SJeff Layton 739782e05efaSJeff Layton static u64 739882e05efaSJeff Layton nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max, 739982e05efaSJeff Layton struct list_head *collect, 740082e05efaSJeff Layton void (*func)(struct nfs4_openowner *)) 74014dbdbda8SBryan Schumaker { 74024dbdbda8SBryan Schumaker struct nfs4_openowner *oop, *next; 740382e05efaSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 740482e05efaSJeff Layton nfsd_net_id); 74054dbdbda8SBryan Schumaker u64 count = 0; 74064dbdbda8SBryan Schumaker 740782e05efaSJeff Layton lockdep_assert_held(&nn->client_lock); 740882e05efaSJeff Layton 740982e05efaSJeff Layton spin_lock(&clp->cl_lock); 74104dbdbda8SBryan Schumaker list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { 741182e05efaSJeff Layton if (func) { 74124dbdbda8SBryan Schumaker func(oop); 741382e05efaSJeff Layton if (collect) { 741414ed14ccSJ. Bruce Fields atomic_inc(&clp->cl_rpc_users); 741582e05efaSJeff Layton list_add(&oop->oo_perclient, collect); 741682e05efaSJeff Layton } 741782e05efaSJeff Layton } 741882e05efaSJeff Layton ++count; 741982e05efaSJeff Layton /* 742082e05efaSJeff Layton * Despite the fact that these functions deal with 742182e05efaSJeff Layton * 64-bit integers for "count", we must ensure that 742214ed14ccSJ. Bruce Fields * it doesn't blow up the clp->cl_rpc_users. Throw a 742382e05efaSJeff Layton * warning if we start to approach INT_MAX here. 742482e05efaSJeff Layton */ 742582e05efaSJeff Layton WARN_ON_ONCE(count == (INT_MAX / 2)); 742682e05efaSJeff Layton if (count == max) 74274dbdbda8SBryan Schumaker break; 74284dbdbda8SBryan Schumaker } 742982e05efaSJeff Layton spin_unlock(&clp->cl_lock); 74304dbdbda8SBryan Schumaker 74314dbdbda8SBryan Schumaker return count; 74324dbdbda8SBryan Schumaker } 74334dbdbda8SBryan Schumaker 743482e05efaSJeff Layton static u64 743582e05efaSJeff Layton nfsd_print_client_openowners(struct nfs4_client *clp) 74364dbdbda8SBryan Schumaker { 743782e05efaSJeff Layton u64 count = nfsd_foreach_client_openowner(clp, 0, NULL, NULL); 743882e05efaSJeff Layton 743982e05efaSJeff Layton nfsd_print_count(clp, count, "openowners"); 744082e05efaSJeff Layton return count; 74414dbdbda8SBryan Schumaker } 74424dbdbda8SBryan Schumaker 744382e05efaSJeff Layton static u64 744482e05efaSJeff Layton nfsd_collect_client_openowners(struct nfs4_client *clp, 744582e05efaSJeff Layton struct list_head *collect, u64 max) 7446184c1847SBryan Schumaker { 744782e05efaSJeff Layton return nfsd_foreach_client_openowner(clp, max, collect, 744882e05efaSJeff Layton unhash_openowner_locked); 744982e05efaSJeff Layton } 745082e05efaSJeff Layton 745182e05efaSJeff Layton u64 7452285abdeeSJeff Layton nfsd_inject_print_openowners(void) 745382e05efaSJeff Layton { 745482e05efaSJeff Layton struct nfs4_client *clp; 745582e05efaSJeff Layton u64 count = 0; 745682e05efaSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 745782e05efaSJeff Layton nfsd_net_id); 745882e05efaSJeff Layton 745982e05efaSJeff Layton if (!nfsd_netns_ready(nn)) 746082e05efaSJeff Layton return 0; 746182e05efaSJeff Layton 746282e05efaSJeff Layton spin_lock(&nn->client_lock); 746382e05efaSJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) 746482e05efaSJeff Layton count += nfsd_print_client_openowners(clp); 746582e05efaSJeff Layton spin_unlock(&nn->client_lock); 746682e05efaSJeff Layton 746782e05efaSJeff Layton return count; 746882e05efaSJeff Layton } 746982e05efaSJeff Layton 747082e05efaSJeff Layton static void 747182e05efaSJeff Layton nfsd_reap_openowners(struct list_head *reaplist) 747282e05efaSJeff Layton { 747382e05efaSJeff Layton struct nfs4_client *clp; 747482e05efaSJeff Layton struct nfs4_openowner *oop, *next; 747582e05efaSJeff Layton 747682e05efaSJeff Layton list_for_each_entry_safe(oop, next, reaplist, oo_perclient) { 747782e05efaSJeff Layton list_del_init(&oop->oo_perclient); 747882e05efaSJeff Layton clp = oop->oo_owner.so_client; 747982e05efaSJeff Layton release_openowner(oop); 748082e05efaSJeff Layton put_client(clp); 748182e05efaSJeff Layton } 748282e05efaSJeff Layton } 748382e05efaSJeff Layton 748482e05efaSJeff Layton u64 7485285abdeeSJeff Layton nfsd_inject_forget_client_openowners(struct sockaddr_storage *addr, 7486285abdeeSJeff Layton size_t addr_size) 748782e05efaSJeff Layton { 748882e05efaSJeff Layton unsigned int count = 0; 748982e05efaSJeff Layton struct nfs4_client *clp; 749082e05efaSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 749182e05efaSJeff Layton nfsd_net_id); 749282e05efaSJeff Layton LIST_HEAD(reaplist); 749382e05efaSJeff Layton 749482e05efaSJeff Layton if (!nfsd_netns_ready(nn)) 749582e05efaSJeff Layton return count; 749682e05efaSJeff Layton 749782e05efaSJeff Layton spin_lock(&nn->client_lock); 749882e05efaSJeff Layton clp = nfsd_find_client(addr, addr_size); 749982e05efaSJeff Layton if (clp) 750082e05efaSJeff Layton count = nfsd_collect_client_openowners(clp, &reaplist, 0); 750182e05efaSJeff Layton spin_unlock(&nn->client_lock); 750282e05efaSJeff Layton nfsd_reap_openowners(&reaplist); 750382e05efaSJeff Layton return count; 750482e05efaSJeff Layton } 750582e05efaSJeff Layton 750682e05efaSJeff Layton u64 7507285abdeeSJeff Layton nfsd_inject_forget_openowners(u64 max) 750882e05efaSJeff Layton { 750982e05efaSJeff Layton u64 count = 0; 751082e05efaSJeff Layton struct nfs4_client *clp; 751182e05efaSJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 751282e05efaSJeff Layton nfsd_net_id); 751382e05efaSJeff Layton LIST_HEAD(reaplist); 751482e05efaSJeff Layton 751582e05efaSJeff Layton if (!nfsd_netns_ready(nn)) 751682e05efaSJeff Layton return count; 751782e05efaSJeff Layton 751882e05efaSJeff Layton spin_lock(&nn->client_lock); 751982e05efaSJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) { 752082e05efaSJeff Layton count += nfsd_collect_client_openowners(clp, &reaplist, 752182e05efaSJeff Layton max - count); 752282e05efaSJeff Layton if (max != 0 && count >= max) 752382e05efaSJeff Layton break; 752482e05efaSJeff Layton } 752582e05efaSJeff Layton spin_unlock(&nn->client_lock); 752682e05efaSJeff Layton nfsd_reap_openowners(&reaplist); 7527184c1847SBryan Schumaker return count; 7528184c1847SBryan Schumaker } 7529184c1847SBryan Schumaker 7530269de30fSBryan Schumaker static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, 7531269de30fSBryan Schumaker struct list_head *victims) 7532269de30fSBryan Schumaker { 7533269de30fSBryan Schumaker struct nfs4_delegation *dp, *next; 753498d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 753598d5c7c5SJeff Layton nfsd_net_id); 7536269de30fSBryan Schumaker u64 count = 0; 7537269de30fSBryan Schumaker 753898d5c7c5SJeff Layton lockdep_assert_held(&nn->client_lock); 753998d5c7c5SJeff Layton 754098d5c7c5SJeff Layton spin_lock(&state_lock); 7541269de30fSBryan Schumaker list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { 7542dff1399fSJeff Layton if (victims) { 7543dff1399fSJeff Layton /* 7544dff1399fSJeff Layton * It's not safe to mess with delegations that have a 7545dff1399fSJeff Layton * non-zero dl_time. They might have already been broken 7546dff1399fSJeff Layton * and could be processed by the laundromat outside of 7547dff1399fSJeff Layton * the state_lock. Just leave them be. 7548dff1399fSJeff Layton */ 7549dff1399fSJeff Layton if (dp->dl_time != 0) 7550dff1399fSJeff Layton continue; 7551dff1399fSJeff Layton 755214ed14ccSJ. Bruce Fields atomic_inc(&clp->cl_rpc_users); 75533fcbbd24SJeff Layton WARN_ON(!unhash_delegation_locked(dp)); 755442690676SJeff Layton list_add(&dp->dl_recall_lru, victims); 7555dff1399fSJeff Layton } 755698d5c7c5SJeff Layton ++count; 755798d5c7c5SJeff Layton /* 755898d5c7c5SJeff Layton * Despite the fact that these functions deal with 755998d5c7c5SJeff Layton * 64-bit integers for "count", we must ensure that 756014ed14ccSJ. Bruce Fields * it doesn't blow up the clp->cl_rpc_users. Throw a 756198d5c7c5SJeff Layton * warning if we start to approach INT_MAX here. 756298d5c7c5SJeff Layton */ 756398d5c7c5SJeff Layton WARN_ON_ONCE(count == (INT_MAX / 2)); 756498d5c7c5SJeff Layton if (count == max) 7565269de30fSBryan Schumaker break; 7566269de30fSBryan Schumaker } 756798d5c7c5SJeff Layton spin_unlock(&state_lock); 7568269de30fSBryan Schumaker return count; 7569269de30fSBryan Schumaker } 7570269de30fSBryan Schumaker 757198d5c7c5SJeff Layton static u64 757298d5c7c5SJeff Layton nfsd_print_client_delegations(struct nfs4_client *clp) 7573269de30fSBryan Schumaker { 757498d5c7c5SJeff Layton u64 count = nfsd_find_all_delegations(clp, 0, NULL); 7575184c1847SBryan Schumaker 7576184c1847SBryan Schumaker nfsd_print_count(clp, count, "delegations"); 7577184c1847SBryan Schumaker return count; 7578184c1847SBryan Schumaker } 7579184c1847SBryan Schumaker 758098d5c7c5SJeff Layton u64 7581285abdeeSJeff Layton nfsd_inject_print_delegations(void) 758298d5c7c5SJeff Layton { 758398d5c7c5SJeff Layton struct nfs4_client *clp; 758498d5c7c5SJeff Layton u64 count = 0; 758598d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 758698d5c7c5SJeff Layton nfsd_net_id); 758798d5c7c5SJeff Layton 758898d5c7c5SJeff Layton if (!nfsd_netns_ready(nn)) 758998d5c7c5SJeff Layton return 0; 759098d5c7c5SJeff Layton 759198d5c7c5SJeff Layton spin_lock(&nn->client_lock); 759298d5c7c5SJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) 759398d5c7c5SJeff Layton count += nfsd_print_client_delegations(clp); 759498d5c7c5SJeff Layton spin_unlock(&nn->client_lock); 759598d5c7c5SJeff Layton 759698d5c7c5SJeff Layton return count; 759798d5c7c5SJeff Layton } 759898d5c7c5SJeff Layton 759998d5c7c5SJeff Layton static void 760098d5c7c5SJeff Layton nfsd_forget_delegations(struct list_head *reaplist) 760198d5c7c5SJeff Layton { 760298d5c7c5SJeff Layton struct nfs4_client *clp; 760398d5c7c5SJeff Layton struct nfs4_delegation *dp, *next; 760498d5c7c5SJeff Layton 760598d5c7c5SJeff Layton list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { 760698d5c7c5SJeff Layton list_del_init(&dp->dl_recall_lru); 760798d5c7c5SJeff Layton clp = dp->dl_stid.sc_client; 760898d5c7c5SJeff Layton revoke_delegation(dp); 760998d5c7c5SJeff Layton put_client(clp); 761098d5c7c5SJeff Layton } 761198d5c7c5SJeff Layton } 761298d5c7c5SJeff Layton 761398d5c7c5SJeff Layton u64 7614285abdeeSJeff Layton nfsd_inject_forget_client_delegations(struct sockaddr_storage *addr, 7615285abdeeSJeff Layton size_t addr_size) 761698d5c7c5SJeff Layton { 761798d5c7c5SJeff Layton u64 count = 0; 761898d5c7c5SJeff Layton struct nfs4_client *clp; 761998d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 762098d5c7c5SJeff Layton nfsd_net_id); 762198d5c7c5SJeff Layton LIST_HEAD(reaplist); 762298d5c7c5SJeff Layton 762398d5c7c5SJeff Layton if (!nfsd_netns_ready(nn)) 762498d5c7c5SJeff Layton return count; 762598d5c7c5SJeff Layton 762698d5c7c5SJeff Layton spin_lock(&nn->client_lock); 762798d5c7c5SJeff Layton clp = nfsd_find_client(addr, addr_size); 762898d5c7c5SJeff Layton if (clp) 762998d5c7c5SJeff Layton count = nfsd_find_all_delegations(clp, 0, &reaplist); 763098d5c7c5SJeff Layton spin_unlock(&nn->client_lock); 763198d5c7c5SJeff Layton 763298d5c7c5SJeff Layton nfsd_forget_delegations(&reaplist); 763398d5c7c5SJeff Layton return count; 763498d5c7c5SJeff Layton } 763598d5c7c5SJeff Layton 763698d5c7c5SJeff Layton u64 7637285abdeeSJeff Layton nfsd_inject_forget_delegations(u64 max) 763898d5c7c5SJeff Layton { 763998d5c7c5SJeff Layton u64 count = 0; 764098d5c7c5SJeff Layton struct nfs4_client *clp; 764198d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 764298d5c7c5SJeff Layton nfsd_net_id); 764398d5c7c5SJeff Layton LIST_HEAD(reaplist); 764498d5c7c5SJeff Layton 764598d5c7c5SJeff Layton if (!nfsd_netns_ready(nn)) 764698d5c7c5SJeff Layton return count; 764798d5c7c5SJeff Layton 764898d5c7c5SJeff Layton spin_lock(&nn->client_lock); 764998d5c7c5SJeff Layton list_for_each_entry(clp, &nn->client_lru, cl_lru) { 765098d5c7c5SJeff Layton count += nfsd_find_all_delegations(clp, max - count, &reaplist); 765198d5c7c5SJeff Layton if (max != 0 && count >= max) 765298d5c7c5SJeff Layton break; 765398d5c7c5SJeff Layton } 765498d5c7c5SJeff Layton spin_unlock(&nn->client_lock); 765598d5c7c5SJeff Layton nfsd_forget_delegations(&reaplist); 765698d5c7c5SJeff Layton return count; 765798d5c7c5SJeff Layton } 765898d5c7c5SJeff Layton 765998d5c7c5SJeff Layton static void 766098d5c7c5SJeff Layton nfsd_recall_delegations(struct list_head *reaplist) 766198d5c7c5SJeff Layton { 766298d5c7c5SJeff Layton struct nfs4_client *clp; 766398d5c7c5SJeff Layton struct nfs4_delegation *dp, *next; 766498d5c7c5SJeff Layton 766598d5c7c5SJeff Layton list_for_each_entry_safe(dp, next, reaplist, dl_recall_lru) { 766698d5c7c5SJeff Layton list_del_init(&dp->dl_recall_lru); 766798d5c7c5SJeff Layton clp = dp->dl_stid.sc_client; 7668dd5e3fbcSChuck Lever 7669dd5e3fbcSChuck Lever trace_nfsd_deleg_recall(&dp->dl_stid.sc_stateid); 7670dd5e3fbcSChuck Lever 767198d5c7c5SJeff Layton /* 767298d5c7c5SJeff Layton * We skipped all entries that had a zero dl_time before, 767398d5c7c5SJeff Layton * so we can now reset the dl_time back to 0. If a delegation 767498d5c7c5SJeff Layton * break comes in now, then it won't make any difference since 767598d5c7c5SJeff Layton * we're recalling it either way. 767698d5c7c5SJeff Layton */ 767798d5c7c5SJeff Layton spin_lock(&state_lock); 767898d5c7c5SJeff Layton dp->dl_time = 0; 767998d5c7c5SJeff Layton spin_unlock(&state_lock); 768098d5c7c5SJeff Layton nfsd_break_one_deleg(dp); 768198d5c7c5SJeff Layton put_client(clp); 768298d5c7c5SJeff Layton } 768398d5c7c5SJeff Layton } 768498d5c7c5SJeff Layton 768598d5c7c5SJeff Layton u64 7686285abdeeSJeff Layton nfsd_inject_recall_client_delegations(struct sockaddr_storage *addr, 768798d5c7c5SJeff Layton size_t addr_size) 768898d5c7c5SJeff Layton { 768998d5c7c5SJeff Layton u64 count = 0; 769098d5c7c5SJeff Layton struct nfs4_client *clp; 769198d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 769298d5c7c5SJeff Layton nfsd_net_id); 769398d5c7c5SJeff Layton LIST_HEAD(reaplist); 769498d5c7c5SJeff Layton 769598d5c7c5SJeff Layton if (!nfsd_netns_ready(nn)) 769698d5c7c5SJeff Layton return count; 769798d5c7c5SJeff Layton 769898d5c7c5SJeff Layton spin_lock(&nn->client_lock); 769998d5c7c5SJeff Layton clp = nfsd_find_client(addr, addr_size); 770098d5c7c5SJeff Layton if (clp) 770198d5c7c5SJeff Layton count = nfsd_find_all_delegations(clp, 0, &reaplist); 770298d5c7c5SJeff Layton spin_unlock(&nn->client_lock); 770398d5c7c5SJeff Layton 770498d5c7c5SJeff Layton nfsd_recall_delegations(&reaplist); 770598d5c7c5SJeff Layton return count; 770698d5c7c5SJeff Layton } 770798d5c7c5SJeff Layton 770898d5c7c5SJeff Layton u64 7709285abdeeSJeff Layton nfsd_inject_recall_delegations(u64 max) 771098d5c7c5SJeff Layton { 771198d5c7c5SJeff Layton u64 count = 0; 771298d5c7c5SJeff Layton struct nfs4_client *clp, *next; 771398d5c7c5SJeff Layton struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, 771498d5c7c5SJeff Layton nfsd_net_id); 771598d5c7c5SJeff Layton LIST_HEAD(reaplist); 771698d5c7c5SJeff Layton 771798d5c7c5SJeff Layton if (!nfsd_netns_ready(nn)) 771898d5c7c5SJeff Layton return count; 771998d5c7c5SJeff Layton 772098d5c7c5SJeff Layton spin_lock(&nn->client_lock); 772198d5c7c5SJeff Layton list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { 772298d5c7c5SJeff Layton count += nfsd_find_all_delegations(clp, max - count, &reaplist); 772398d5c7c5SJeff Layton if (max != 0 && ++count >= max) 772498d5c7c5SJeff Layton break; 772598d5c7c5SJeff Layton } 772698d5c7c5SJeff Layton spin_unlock(&nn->client_lock); 772798d5c7c5SJeff Layton nfsd_recall_delegations(&reaplist); 772898d5c7c5SJeff Layton return count; 772998d5c7c5SJeff Layton } 773065178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 773165178db4SBryan Schumaker 7732c2f1a551SMeelap Shah /* 7733c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 7734c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 7735c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 7736c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 7737c2f1a551SMeelap Shah * 7738c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 7739c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 7740c2f1a551SMeelap Shah */ 7741c2f1a551SMeelap Shah static void 7742c2f1a551SMeelap Shah set_max_delegations(void) 7743c2f1a551SMeelap Shah { 7744c2f1a551SMeelap Shah /* 7745c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 7746c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 7747c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 7748c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 7749c2f1a551SMeelap Shah */ 7750c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 7751c2f1a551SMeelap Shah } 7752c2f1a551SMeelap Shah 7753d85ed443SStanislav Kinsbursky static int nfs4_state_create_net(struct net *net) 77548daae4dcSStanislav Kinsbursky { 77558daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 77568daae4dcSStanislav Kinsbursky int i; 77578daae4dcSStanislav Kinsbursky 77586da2ec56SKees Cook nn->conf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, 77596da2ec56SKees Cook sizeof(struct list_head), 77606da2ec56SKees Cook GFP_KERNEL); 77618daae4dcSStanislav Kinsbursky if (!nn->conf_id_hashtbl) 7762382a62e7SStanislav Kinsbursky goto err; 77636da2ec56SKees Cook nn->unconf_id_hashtbl = kmalloc_array(CLIENT_HASH_SIZE, 77646da2ec56SKees Cook sizeof(struct list_head), 77656da2ec56SKees Cook GFP_KERNEL); 77660a7ec377SStanislav Kinsbursky if (!nn->unconf_id_hashtbl) 77670a7ec377SStanislav Kinsbursky goto err_unconf_id; 77686da2ec56SKees Cook nn->sessionid_hashtbl = kmalloc_array(SESSION_HASH_SIZE, 77696da2ec56SKees Cook sizeof(struct list_head), 77706da2ec56SKees Cook GFP_KERNEL); 77711872de0eSStanislav Kinsbursky if (!nn->sessionid_hashtbl) 77721872de0eSStanislav Kinsbursky goto err_sessionid; 77738daae4dcSStanislav Kinsbursky 7774382a62e7SStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 77758daae4dcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); 77760a7ec377SStanislav Kinsbursky INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); 7777382a62e7SStanislav Kinsbursky } 77781872de0eSStanislav Kinsbursky for (i = 0; i < SESSION_HASH_SIZE; i++) 77791872de0eSStanislav Kinsbursky INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); 7780382a62e7SStanislav Kinsbursky nn->conf_name_tree = RB_ROOT; 7781a99454aaSStanislav Kinsbursky nn->unconf_name_tree = RB_ROOT; 77829cc76801SArnd Bergmann nn->boot_time = ktime_get_real_seconds(); 778381833de1SVasily Averin nn->grace_ended = false; 778481833de1SVasily Averin nn->nfsd4_manager.block_opens = true; 778581833de1SVasily Averin INIT_LIST_HEAD(&nn->nfsd4_manager.list); 77865ed58bb2SStanislav Kinsbursky INIT_LIST_HEAD(&nn->client_lru); 778773758fedSStanislav Kinsbursky INIT_LIST_HEAD(&nn->close_lru); 7788e8c69d17SJ. Bruce Fields INIT_LIST_HEAD(&nn->del_recall_lru); 7789c9a49628SStanislav Kinsbursky spin_lock_init(&nn->client_lock); 7790e0639dc5SOlga Kornievskaia spin_lock_init(&nn->s2s_cp_lock); 7791e0639dc5SOlga Kornievskaia idr_init(&nn->s2s_cp_stateids); 77928daae4dcSStanislav Kinsbursky 77930cc11a61SJeff Layton spin_lock_init(&nn->blocked_locks_lock); 77940cc11a61SJeff Layton INIT_LIST_HEAD(&nn->blocked_locks_lru); 77950cc11a61SJeff Layton 779609121281SStanislav Kinsbursky INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); 7797d85ed443SStanislav Kinsbursky get_net(net); 779809121281SStanislav Kinsbursky 77998daae4dcSStanislav Kinsbursky return 0; 7800382a62e7SStanislav Kinsbursky 78011872de0eSStanislav Kinsbursky err_sessionid: 78029b531137SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 78030a7ec377SStanislav Kinsbursky err_unconf_id: 78040a7ec377SStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 7805382a62e7SStanislav Kinsbursky err: 7806382a62e7SStanislav Kinsbursky return -ENOMEM; 78078daae4dcSStanislav Kinsbursky } 78088daae4dcSStanislav Kinsbursky 78098daae4dcSStanislav Kinsbursky static void 78104dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(struct net *net) 78118daae4dcSStanislav Kinsbursky { 78128daae4dcSStanislav Kinsbursky int i; 78138daae4dcSStanislav Kinsbursky struct nfs4_client *clp = NULL; 78148daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 78158daae4dcSStanislav Kinsbursky 78168daae4dcSStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 78178daae4dcSStanislav Kinsbursky while (!list_empty(&nn->conf_id_hashtbl[i])) { 78188daae4dcSStanislav Kinsbursky clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 78198daae4dcSStanislav Kinsbursky destroy_client(clp); 78208daae4dcSStanislav Kinsbursky } 78218daae4dcSStanislav Kinsbursky } 7822a99454aaSStanislav Kinsbursky 782368ef3bc3SJeff Layton WARN_ON(!list_empty(&nn->blocked_locks_lru)); 782468ef3bc3SJeff Layton 78252b905635SKinglong Mee for (i = 0; i < CLIENT_HASH_SIZE; i++) { 78262b905635SKinglong Mee while (!list_empty(&nn->unconf_id_hashtbl[i])) { 78272b905635SKinglong Mee clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 7828a99454aaSStanislav Kinsbursky destroy_client(clp); 7829a99454aaSStanislav Kinsbursky } 78302b905635SKinglong Mee } 7831a99454aaSStanislav Kinsbursky 78321872de0eSStanislav Kinsbursky kfree(nn->sessionid_hashtbl); 78330a7ec377SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 78348daae4dcSStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 78354dce0ac9SStanislav Kinsbursky put_net(net); 78368daae4dcSStanislav Kinsbursky } 78378daae4dcSStanislav Kinsbursky 7838f252bc68SStanislav Kinsbursky int 7839d85ed443SStanislav Kinsbursky nfs4_state_start_net(struct net *net) 7840ac4d8ff2SNeilBrown { 78415e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 7842b5a1a81eSJ. Bruce Fields int ret; 7843b5a1a81eSJ. Bruce Fields 7844d85ed443SStanislav Kinsbursky ret = nfs4_state_create_net(net); 78458daae4dcSStanislav Kinsbursky if (ret) 78468daae4dcSStanislav Kinsbursky return ret; 7847d4318acdSJeff Layton locks_start_grace(net, &nn->nfsd4_manager); 7848d4318acdSJeff Layton nfsd4_client_tracking_init(net); 7849362063a5SScott Mayhew if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0) 7850362063a5SScott Mayhew goto skip_grace; 785120b7d86fSArnd Bergmann printk(KERN_INFO "NFSD: starting %lld-second grace period (net %x)\n", 78527e981a8aSVasily Averin nn->nfsd4_grace, net->ns.inum); 7853dd5e3fbcSChuck Lever trace_nfsd_grace_start(nn); 78545284b44eSStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); 7855d85ed443SStanislav Kinsbursky return 0; 7856362063a5SScott Mayhew 7857362063a5SScott Mayhew skip_grace: 7858362063a5SScott Mayhew printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n", 7859362063a5SScott Mayhew net->ns.inum); 7860362063a5SScott Mayhew queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ); 7861362063a5SScott Mayhew nfsd4_end_grace(nn); 7862362063a5SScott Mayhew return 0; 7863a6d6b781SJeff Layton } 7864d85ed443SStanislav Kinsbursky 7865d85ed443SStanislav Kinsbursky /* initialization to perform when the nfsd service is started: */ 7866d85ed443SStanislav Kinsbursky 7867d85ed443SStanislav Kinsbursky int 7868d85ed443SStanislav Kinsbursky nfs4_state_start(void) 7869d85ed443SStanislav Kinsbursky { 7870d85ed443SStanislav Kinsbursky int ret; 7871d85ed443SStanislav Kinsbursky 787251a54568SJeff Layton laundry_wq = alloc_workqueue("%s", WQ_UNBOUND, 0, "nfsd4"); 7873a6d6b781SJeff Layton if (laundry_wq == NULL) { 7874a6d6b781SJeff Layton ret = -ENOMEM; 7875a26dd64fSChuck Lever goto out; 7876a6d6b781SJeff Layton } 7877b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 7878b5a1a81eSJ. Bruce Fields if (ret) 7879b5a1a81eSJ. Bruce Fields goto out_free_laundry; 788009121281SStanislav Kinsbursky 7881c2f1a551SMeelap Shah set_max_delegations(); 7882b5a1a81eSJ. Bruce Fields return 0; 7883d85ed443SStanislav Kinsbursky 7884b5a1a81eSJ. Bruce Fields out_free_laundry: 7885b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 7886a26dd64fSChuck Lever out: 7887b5a1a81eSJ. Bruce Fields return ret; 78881da177e4SLinus Torvalds } 78891da177e4SLinus Torvalds 7890f252bc68SStanislav Kinsbursky void 78914dce0ac9SStanislav Kinsbursky nfs4_state_shutdown_net(struct net *net) 78921da177e4SLinus Torvalds { 78931da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 78941da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 78954dce0ac9SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 78961da177e4SLinus Torvalds 78974dce0ac9SStanislav Kinsbursky cancel_delayed_work_sync(&nn->laundromat_work); 78984dce0ac9SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 7899ac55fdc4SJeff Layton 79001da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 7901cdc97505SBenny Halevy spin_lock(&state_lock); 7902e8c69d17SJ. Bruce Fields list_for_each_safe(pos, next, &nn->del_recall_lru) { 79031da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 79043fcbbd24SJeff Layton WARN_ON(!unhash_delegation_locked(dp)); 790542690676SJeff Layton list_add(&dp->dl_recall_lru, &reaplist); 79061da177e4SLinus Torvalds } 7907cdc97505SBenny Halevy spin_unlock(&state_lock); 79081da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 79091da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 791042690676SJeff Layton list_del_init(&dp->dl_recall_lru); 79110af6e690SJ. Bruce Fields destroy_unhashed_deleg(dp); 79121da177e4SLinus Torvalds } 79131da177e4SLinus Torvalds 79143320fef1SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 79154dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(net); 79161da177e4SLinus Torvalds } 79171da177e4SLinus Torvalds 79181da177e4SLinus Torvalds void 79191da177e4SLinus Torvalds nfs4_state_shutdown(void) 79201da177e4SLinus Torvalds { 79215e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 7922c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 79231da177e4SLinus Torvalds } 79248b70484cSTigran Mkrtchyan 79258b70484cSTigran Mkrtchyan static void 79268b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 79278b70484cSTigran Mkrtchyan { 792851100d2bSOlga Kornievskaia if (HAS_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG) && 792951100d2bSOlga Kornievskaia CURRENT_STATEID(stateid)) 793037c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 79318b70484cSTigran Mkrtchyan } 79328b70484cSTigran Mkrtchyan 79338b70484cSTigran Mkrtchyan static void 79348b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 79358b70484cSTigran Mkrtchyan { 793637c593c5STigran Mkrtchyan if (cstate->minorversion) { 793737c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 793851100d2bSOlga Kornievskaia SET_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 793937c593c5STigran Mkrtchyan } 794037c593c5STigran Mkrtchyan } 794137c593c5STigran Mkrtchyan 794237c593c5STigran Mkrtchyan void 794337c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 794437c593c5STigran Mkrtchyan { 794551100d2bSOlga Kornievskaia CLEAR_CSTATE_FLAG(cstate, CURRENT_STATE_ID_FLAG); 79468b70484cSTigran Mkrtchyan } 79478b70484cSTigran Mkrtchyan 794862cd4a59STigran Mkrtchyan /* 794962cd4a59STigran Mkrtchyan * functions to set current state id 795062cd4a59STigran Mkrtchyan */ 79518b70484cSTigran Mkrtchyan void 7952b60e9859SChristoph Hellwig nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, 7953b60e9859SChristoph Hellwig union nfsd4_op_u *u) 79549428fe1aSTigran Mkrtchyan { 7955b60e9859SChristoph Hellwig put_stateid(cstate, &u->open_downgrade.od_stateid); 79569428fe1aSTigran Mkrtchyan } 79579428fe1aSTigran Mkrtchyan 79589428fe1aSTigran Mkrtchyan void 7959b60e9859SChristoph Hellwig nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, 7960b60e9859SChristoph Hellwig union nfsd4_op_u *u) 79618b70484cSTigran Mkrtchyan { 7962b60e9859SChristoph Hellwig put_stateid(cstate, &u->open.op_stateid); 79638b70484cSTigran Mkrtchyan } 79648b70484cSTigran Mkrtchyan 79658b70484cSTigran Mkrtchyan void 7966b60e9859SChristoph Hellwig nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, 7967b60e9859SChristoph Hellwig union nfsd4_op_u *u) 796862cd4a59STigran Mkrtchyan { 7969b60e9859SChristoph Hellwig put_stateid(cstate, &u->close.cl_stateid); 797062cd4a59STigran Mkrtchyan } 797162cd4a59STigran Mkrtchyan 797262cd4a59STigran Mkrtchyan void 7973b60e9859SChristoph Hellwig nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, 7974b60e9859SChristoph Hellwig union nfsd4_op_u *u) 797562cd4a59STigran Mkrtchyan { 7976b60e9859SChristoph Hellwig put_stateid(cstate, &u->lock.lk_resp_stateid); 797762cd4a59STigran Mkrtchyan } 797862cd4a59STigran Mkrtchyan 797962cd4a59STigran Mkrtchyan /* 798062cd4a59STigran Mkrtchyan * functions to consume current state id 798162cd4a59STigran Mkrtchyan */ 79821e97b519STigran Mkrtchyan 79831e97b519STigran Mkrtchyan void 798457832e7bSChristoph Hellwig nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, 798557832e7bSChristoph Hellwig union nfsd4_op_u *u) 79869428fe1aSTigran Mkrtchyan { 798757832e7bSChristoph Hellwig get_stateid(cstate, &u->open_downgrade.od_stateid); 79889428fe1aSTigran Mkrtchyan } 79899428fe1aSTigran Mkrtchyan 79909428fe1aSTigran Mkrtchyan void 799157832e7bSChristoph Hellwig nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, 799257832e7bSChristoph Hellwig union nfsd4_op_u *u) 79939428fe1aSTigran Mkrtchyan { 799457832e7bSChristoph Hellwig get_stateid(cstate, &u->delegreturn.dr_stateid); 79959428fe1aSTigran Mkrtchyan } 79969428fe1aSTigran Mkrtchyan 79979428fe1aSTigran Mkrtchyan void 799857832e7bSChristoph Hellwig nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, 799957832e7bSChristoph Hellwig union nfsd4_op_u *u) 80001e97b519STigran Mkrtchyan { 800157832e7bSChristoph Hellwig get_stateid(cstate, &u->free_stateid.fr_stateid); 80021e97b519STigran Mkrtchyan } 80031e97b519STigran Mkrtchyan 80041e97b519STigran Mkrtchyan void 800557832e7bSChristoph Hellwig nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, 800657832e7bSChristoph Hellwig union nfsd4_op_u *u) 80071e97b519STigran Mkrtchyan { 800857832e7bSChristoph Hellwig get_stateid(cstate, &u->setattr.sa_stateid); 80091e97b519STigran Mkrtchyan } 80101e97b519STigran Mkrtchyan 801162cd4a59STigran Mkrtchyan void 801257832e7bSChristoph Hellwig nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, 801357832e7bSChristoph Hellwig union nfsd4_op_u *u) 80148b70484cSTigran Mkrtchyan { 801557832e7bSChristoph Hellwig get_stateid(cstate, &u->close.cl_stateid); 80168b70484cSTigran Mkrtchyan } 80178b70484cSTigran Mkrtchyan 80188b70484cSTigran Mkrtchyan void 801957832e7bSChristoph Hellwig nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, 802057832e7bSChristoph Hellwig union nfsd4_op_u *u) 80218b70484cSTigran Mkrtchyan { 802257832e7bSChristoph Hellwig get_stateid(cstate, &u->locku.lu_stateid); 80238b70484cSTigran Mkrtchyan } 802430813e27STigran Mkrtchyan 802530813e27STigran Mkrtchyan void 802657832e7bSChristoph Hellwig nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, 802757832e7bSChristoph Hellwig union nfsd4_op_u *u) 802830813e27STigran Mkrtchyan { 802957832e7bSChristoph Hellwig get_stateid(cstate, &u->read.rd_stateid); 803030813e27STigran Mkrtchyan } 803130813e27STigran Mkrtchyan 803230813e27STigran Mkrtchyan void 803357832e7bSChristoph Hellwig nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, 803457832e7bSChristoph Hellwig union nfsd4_op_u *u) 803530813e27STigran Mkrtchyan { 803657832e7bSChristoph Hellwig get_stateid(cstate, &u->write.wr_stateid); 803730813e27STigran Mkrtchyan } 8038