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> 361da177e4SLinus Torvalds #include <linux/smp_lock.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4068e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 41363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 429a74af21SBoaz Harrosh #include "xdr4.h" 430a3adadeSJ. Bruce Fields #include "vfs.h" 441da177e4SLinus Torvalds 451da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds /* Globals */ 48cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 49efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 50fd39ca9aSNeilBrown static time_t boot_time; 511da177e4SLinus Torvalds static u32 current_ownerid = 1; 521da177e4SLinus Torvalds static u32 current_fileid = 1; 531da177e4SLinus Torvalds static u32 current_delegid = 1; 541da177e4SLinus Torvalds static u32 nfs4_init; 55fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 56fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 57ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 58fd39ca9aSNeilBrown 59fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 60fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds /* forward declarations */ 63fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 641da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 650964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 660964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 671da177e4SLinus Torvalds 688b671b80SJ. Bruce Fields /* Locking: */ 698b671b80SJ. Bruce Fields 708b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 71353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 721da177e4SLinus Torvalds 738b671b80SJ. Bruce Fields /* 748b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 758b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 768b671b80SJ. Bruce Fields * eventually cover more: 778b671b80SJ. Bruce Fields */ 788b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 798b671b80SJ. Bruce Fields 80e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 81e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 83e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 84e60d4398SNeilBrown 851da177e4SLinus Torvalds void 861da177e4SLinus Torvalds nfs4_lock_state(void) 871da177e4SLinus Torvalds { 88353ab6e9SIngo Molnar mutex_lock(&client_mutex); 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds void 921da177e4SLinus Torvalds nfs4_unlock_state(void) 931da177e4SLinus Torvalds { 94353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static inline u32 981da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 991da177e4SLinus Torvalds { 1001da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds u32 x = 0; 1031da177e4SLinus Torvalds while (nbytes--) { 1041da177e4SLinus Torvalds x *= 37; 1051da177e4SLinus Torvalds x += *cptr++; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds return x; 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static struct list_head del_recall_lru; 1111da177e4SLinus Torvalds 11213cd2184SNeilBrown static inline void 11313cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11413cd2184SNeilBrown { 1158b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1168b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1178b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1188b671b80SJ. Bruce Fields iput(fi->fi_inode); 1198b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1208b671b80SJ. Bruce Fields } 12113cd2184SNeilBrown } 12213cd2184SNeilBrown 12313cd2184SNeilBrown static inline void 12413cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12513cd2184SNeilBrown { 1268b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12713cd2184SNeilBrown } 12813cd2184SNeilBrown 129ef0f3390SNeilBrown static int num_delegations; 130c2f1a551SMeelap Shah unsigned int max_delegations; 131ef0f3390SNeilBrown 132ef0f3390SNeilBrown /* 133ef0f3390SNeilBrown * Open owner state (share locks) 134ef0f3390SNeilBrown */ 135ef0f3390SNeilBrown 136ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 137ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 138ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 139ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 140ef0f3390SNeilBrown 141ef0f3390SNeilBrown #define ownerid_hashval(id) \ 142ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 143ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 144ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 145ef0f3390SNeilBrown 146ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 147ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 148ef0f3390SNeilBrown 149ef0f3390SNeilBrown /* hash table for nfs4_file */ 150ef0f3390SNeilBrown #define FILE_HASH_BITS 8 151ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 152ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 153ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 154ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 155ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 156ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 157ef0f3390SNeilBrown 158ef0f3390SNeilBrown #define file_hashval(x) \ 159ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 160ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 161ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 162ef0f3390SNeilBrown 163ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 164ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 165ef0f3390SNeilBrown 1661da177e4SLinus Torvalds static struct nfs4_delegation * 1671da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1681da177e4SLinus Torvalds { 1691da177e4SLinus Torvalds struct nfs4_delegation *dp; 1701da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 171c237dc03SJ. Bruce Fields struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; 1721da177e4SLinus Torvalds 1731da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 17447f9940cSMeelap Shah if (fp->fi_had_conflict) 17547f9940cSMeelap Shah return NULL; 176c2f1a551SMeelap Shah if (num_delegations > max_delegations) 177ef0f3390SNeilBrown return NULL; 1785b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1795b2d21c1SNeilBrown if (dp == NULL) 1801da177e4SLinus Torvalds return dp; 181ef0f3390SNeilBrown num_delegations++; 182ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 183ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1841da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1851da177e4SLinus Torvalds dp->dl_client = clp; 18613cd2184SNeilBrown get_nfs4_file(fp); 1871da177e4SLinus Torvalds dp->dl_file = fp; 1881da177e4SLinus Torvalds dp->dl_flock = NULL; 1891da177e4SLinus Torvalds get_file(stp->st_vfs_file); 1901da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 1911da177e4SLinus Torvalds dp->dl_type = type; 192b53d40c5SJ. Bruce Fields dp->dl_ident = cb->cb_ident; 19378155ed7SBian Naimeng dp->dl_stateid.si_boot = get_seconds(); 1941da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 1951da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 1961da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 1976c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 1981da177e4SLinus Torvalds dp->dl_time = 0; 1991da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 200ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 201ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 202b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2031da177e4SLinus Torvalds return dp; 2041da177e4SLinus Torvalds } 2051da177e4SLinus Torvalds 2061da177e4SLinus Torvalds void 2071da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2081da177e4SLinus Torvalds { 2091da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2101da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 21113cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2125b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 213ef0f3390SNeilBrown num_delegations--; 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2181da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2191da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2201da177e4SLinus Torvalds * fl_release_callback. 2211da177e4SLinus Torvalds */ 2221da177e4SLinus Torvalds static void 2231da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2241da177e4SLinus Torvalds { 2251da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2281da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2291da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2301da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 231c907132dSNeilBrown if (dp->dl_flock) 232a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2331da177e4SLinus Torvalds nfsd_close(filp); 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds 2361da177e4SLinus Torvalds /* Called under the state lock. */ 2371da177e4SLinus Torvalds static void 2381da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2391da177e4SLinus Torvalds { 240ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 241ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2421da177e4SLinus Torvalds spin_lock(&recall_lock); 2431da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2441da177e4SLinus Torvalds spin_unlock(&recall_lock); 2451da177e4SLinus Torvalds nfs4_close_delegation(dp); 2461da177e4SLinus Torvalds nfs4_put_delegation(dp); 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 2491da177e4SLinus Torvalds /* 2501da177e4SLinus Torvalds * SETCLIENTID state 2511da177e4SLinus Torvalds */ 2521da177e4SLinus Torvalds 2539089f1b4SBenny Halevy /* client_lock protects the session hash table */ 2549089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 2559089f1b4SBenny Halevy 2561da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2571da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2581da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2591da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds #define clientid_hashval(id) \ 2621da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 263a55370a3SNeilBrown #define clientstr_hashval(name) \ 264a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2651da177e4SLinus Torvalds /* 2661da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2671da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2681da177e4SLinus Torvalds * 2691da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2701da177e4SLinus Torvalds * setclientid_confirmed info. 2711da177e4SLinus Torvalds * 2721da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2731da177e4SLinus Torvalds * setclientid info. 2741da177e4SLinus Torvalds * 2751da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2761da177e4SLinus Torvalds * for lease renewal. 2771da177e4SLinus Torvalds * 2781da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2791da177e4SLinus Torvalds * for last close replay. 2801da177e4SLinus Torvalds */ 2811da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2821da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2831da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2841da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2851da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2861da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2871da177e4SLinus Torvalds static struct list_head client_lru; 2881da177e4SLinus Torvalds static struct list_head close_lru; 2891da177e4SLinus Torvalds 2902283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 2912283963fSJ. Bruce Fields { 2922283963fSJ. Bruce Fields list_del(&stp->st_hash); 2932283963fSJ. Bruce Fields list_del(&stp->st_perfile); 2942283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 2952283963fSJ. Bruce Fields } 2962283963fSJ. Bruce Fields 2972283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 2982283963fSJ. Bruce Fields { 2992283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3002283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3012283963fSJ. Bruce Fields } 3022283963fSJ. Bruce Fields 3032283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3042283963fSJ. Bruce Fields { 3052283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3062283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3072283963fSJ. Bruce Fields free_generic_stateid(stp); 3082283963fSJ. Bruce Fields } 3092283963fSJ. Bruce Fields 310f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 311f044ff83SJ. Bruce Fields { 312f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 313f044ff83SJ. Bruce Fields 314f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 315f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 316f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 317f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 318f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 319f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 320f044ff83SJ. Bruce Fields release_lock_stateid(stp); 321f044ff83SJ. Bruce Fields } 322f044ff83SJ. Bruce Fields } 323f044ff83SJ. Bruce Fields 324f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 325f044ff83SJ. Bruce Fields { 326f044ff83SJ. Bruce Fields unhash_lockowner(sop); 327f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 328f044ff83SJ. Bruce Fields } 329f044ff83SJ. Bruce Fields 330f1d110caSJ. Bruce Fields static void 331f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 332f1d110caSJ. Bruce Fields { 333f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 334f1d110caSJ. Bruce Fields 335f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 336f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 337f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 338f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 339f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 340f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 341f1d110caSJ. Bruce Fields } 342f1d110caSJ. Bruce Fields } 343f1d110caSJ. Bruce Fields 3442283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3452283963fSJ. Bruce Fields { 3462283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3472283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3482283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3492283963fSJ. Bruce Fields free_generic_stateid(stp); 3502283963fSJ. Bruce Fields } 3512283963fSJ. Bruce Fields 352f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 353f1d110caSJ. Bruce Fields { 354f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 355f1d110caSJ. Bruce Fields 356f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 357f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 358f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 359f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 360f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 361f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 362f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 363f1d110caSJ. Bruce Fields release_open_stateid(stp); 364f1d110caSJ. Bruce Fields } 365f1d110caSJ. Bruce Fields } 366f1d110caSJ. Bruce Fields 367f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 368f1d110caSJ. Bruce Fields { 369f044ff83SJ. Bruce Fields unhash_openowner(sop); 370f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 371f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 372f1d110caSJ. Bruce Fields } 373f1d110caSJ. Bruce Fields 3745282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 3755282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 3765282fd72SMarc Eshel 3775282fd72SMarc Eshel static inline int 3785282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 3795282fd72SMarc Eshel { 3805282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 3815282fd72SMarc Eshel 3825282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 3835282fd72SMarc Eshel } 3845282fd72SMarc Eshel 3855282fd72SMarc Eshel static inline void 3865282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 3875282fd72SMarc Eshel { 3885282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 3895282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 3905282fd72SMarc Eshel } 3915282fd72SMarc Eshel 392ec6b5d7bSAndy Adamson static void 393ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 394ec6b5d7bSAndy Adamson { 395ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 396ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 397ec6b5d7bSAndy Adamson 398ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 399ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 400ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 401ec6b5d7bSAndy Adamson sid->reserved = 0; 402ec6b5d7bSAndy Adamson } 403ec6b5d7bSAndy Adamson 404ec6b5d7bSAndy Adamson /* 405a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 406a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 407a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 408a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 409a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 410a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 411a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 412a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 413a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 414a649637cSAndy Adamson * for the SEQUENCE op response: 415ec6b5d7bSAndy Adamson */ 416a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 417a649637cSAndy Adamson 418a649637cSAndy Adamson /* 419a649637cSAndy Adamson * Give the client the number of ca_maxresponsesize_cached slots it 420a649637cSAndy Adamson * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, 421a649637cSAndy Adamson * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more 422a649637cSAndy Adamson * than NFSD_MAX_SLOTS_PER_SESSION. 423a649637cSAndy Adamson * 424a649637cSAndy Adamson * If we run out of reserved DRC memory we should (up to a point) 425a649637cSAndy Adamson * re-negotiate active sessions and reduce their slot usage to make 426a649637cSAndy Adamson * rooom for new connections. For now we just fail the create session. 427a649637cSAndy Adamson */ 428a649637cSAndy Adamson static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) 429ec6b5d7bSAndy Adamson { 430a649637cSAndy Adamson int mem, size = fchan->maxresp_cached; 431ec6b5d7bSAndy Adamson 4325d77ddfbSAndy Adamson if (fchan->maxreqs < 1) 4335d77ddfbSAndy Adamson return nfserr_inval; 4345d77ddfbSAndy Adamson 435a649637cSAndy Adamson if (size < NFSD_MIN_HDR_SEQ_SZ) 436a649637cSAndy Adamson size = NFSD_MIN_HDR_SEQ_SZ; 437a649637cSAndy Adamson size -= NFSD_MIN_HDR_SEQ_SZ; 438a649637cSAndy Adamson if (size > NFSD_SLOT_CACHE_SIZE) 439a649637cSAndy Adamson size = NFSD_SLOT_CACHE_SIZE; 440a649637cSAndy Adamson 441a649637cSAndy Adamson /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ 442a649637cSAndy Adamson mem = fchan->maxreqs * size; 443a649637cSAndy Adamson if (mem > NFSD_MAX_MEM_PER_SESSION) { 444a649637cSAndy Adamson fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; 445a649637cSAndy Adamson if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) 446ec6b5d7bSAndy Adamson fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; 447a649637cSAndy Adamson mem = fchan->maxreqs * size; 448a649637cSAndy Adamson } 449ec6b5d7bSAndy Adamson 4504bd9b0f4SAndy Adamson spin_lock(&nfsd_drc_lock); 451a649637cSAndy Adamson /* bound the total session drc memory ussage */ 452a649637cSAndy Adamson if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { 453a649637cSAndy Adamson fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; 454a649637cSAndy Adamson mem = fchan->maxreqs * size; 455a649637cSAndy Adamson } 4560c193054SAndy Adamson nfsd_drc_mem_used += mem; 4574bd9b0f4SAndy Adamson spin_unlock(&nfsd_drc_lock); 458ec6b5d7bSAndy Adamson 459b101ebbcSAndy Adamson if (fchan->maxreqs == 0) 460bdac86e2SAndy Adamson return nfserr_serverfault; 461ec6b5d7bSAndy Adamson 462a649637cSAndy Adamson fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; 463b101ebbcSAndy Adamson return 0; 464ec6b5d7bSAndy Adamson } 465ec6b5d7bSAndy Adamson 466ec6b5d7bSAndy Adamson /* 467ec6b5d7bSAndy Adamson * fchan holds the client values on input, and the server values on output 468ddc04fd4SAndy Adamson * sv_max_mesg is the maximum payload plus one page for overhead. 469ec6b5d7bSAndy Adamson */ 470ec6b5d7bSAndy Adamson static int init_forechannel_attrs(struct svc_rqst *rqstp, 4716c18ba9fSAlexandros Batsakis struct nfsd4_channel_attrs *session_fchan, 472ec6b5d7bSAndy Adamson struct nfsd4_channel_attrs *fchan) 473ec6b5d7bSAndy Adamson { 474ec6b5d7bSAndy Adamson int status = 0; 475ddc04fd4SAndy Adamson __u32 maxcount = nfsd_serv->sv_max_mesg; 476ec6b5d7bSAndy Adamson 477ec6b5d7bSAndy Adamson /* headerpadsz set to zero in encode routine */ 478ec6b5d7bSAndy Adamson 479ec6b5d7bSAndy Adamson /* Use the client's max request and max response size if possible */ 480ec6b5d7bSAndy Adamson if (fchan->maxreq_sz > maxcount) 481ec6b5d7bSAndy Adamson fchan->maxreq_sz = maxcount; 4826c18ba9fSAlexandros Batsakis session_fchan->maxreq_sz = fchan->maxreq_sz; 483ec6b5d7bSAndy Adamson 484ec6b5d7bSAndy Adamson if (fchan->maxresp_sz > maxcount) 485ec6b5d7bSAndy Adamson fchan->maxresp_sz = maxcount; 4866c18ba9fSAlexandros Batsakis session_fchan->maxresp_sz = fchan->maxresp_sz; 487ec6b5d7bSAndy Adamson 488ec6b5d7bSAndy Adamson /* Use the client's maxops if possible */ 489ec6b5d7bSAndy Adamson if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) 490ec6b5d7bSAndy Adamson fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; 4916c18ba9fSAlexandros Batsakis session_fchan->maxops = fchan->maxops; 492ec6b5d7bSAndy Adamson 493ec6b5d7bSAndy Adamson /* FIXME: Error means no more DRC pages so the server should 494ec6b5d7bSAndy Adamson * recover pages from existing sessions. For now fail session 495ec6b5d7bSAndy Adamson * creation. 496ec6b5d7bSAndy Adamson */ 497a649637cSAndy Adamson status = set_forechannel_drc_size(fchan); 498ec6b5d7bSAndy Adamson 499a649637cSAndy Adamson session_fchan->maxresp_cached = fchan->maxresp_cached; 5006c18ba9fSAlexandros Batsakis session_fchan->maxreqs = fchan->maxreqs; 501a649637cSAndy Adamson 502a649637cSAndy Adamson dprintk("%s status %d\n", __func__, status); 503ec6b5d7bSAndy Adamson return status; 504ec6b5d7bSAndy Adamson } 505ec6b5d7bSAndy Adamson 506557ce264SAndy Adamson static void 507557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 508557ce264SAndy Adamson { 509557ce264SAndy Adamson int i; 510557ce264SAndy Adamson 511557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 512557ce264SAndy Adamson kfree(ses->se_slots[i]); 513557ce264SAndy Adamson } 514557ce264SAndy Adamson 515efe0cb6dSJ. Bruce Fields /* 516efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 517efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 518efe0cb6dSJ. Bruce Fields */ 519efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 520efe0cb6dSJ. Bruce Fields { 521efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 522efe0cb6dSJ. Bruce Fields } 523efe0cb6dSJ. Bruce Fields 524ec6b5d7bSAndy Adamson static int 525ec6b5d7bSAndy Adamson alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, 526ec6b5d7bSAndy Adamson struct nfsd4_create_session *cses) 527ec6b5d7bSAndy Adamson { 528ec6b5d7bSAndy Adamson struct nfsd4_session *new, tmp; 529557ce264SAndy Adamson struct nfsd4_slot *sp; 530557ce264SAndy Adamson int idx, slotsize, cachesize, i; 531557ce264SAndy Adamson int status; 532ec6b5d7bSAndy Adamson 533ec6b5d7bSAndy Adamson memset(&tmp, 0, sizeof(tmp)); 534ec6b5d7bSAndy Adamson 535ec6b5d7bSAndy Adamson /* FIXME: For now, we just accept the client back channel attributes. */ 5366c18ba9fSAlexandros Batsakis tmp.se_bchannel = cses->back_channel; 5376c18ba9fSAlexandros Batsakis status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, 5386c18ba9fSAlexandros Batsakis &cses->fore_channel); 539ec6b5d7bSAndy Adamson if (status) 540ec6b5d7bSAndy Adamson goto out; 541ec6b5d7bSAndy Adamson 542557ce264SAndy Adamson BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) 543557ce264SAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 544557ce264SAndy Adamson 545557ce264SAndy Adamson status = nfserr_serverfault; 546557ce264SAndy Adamson /* allocate struct nfsd4_session and slot table pointers in one piece */ 547557ce264SAndy Adamson slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); 548ec6b5d7bSAndy Adamson new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); 549ec6b5d7bSAndy Adamson if (!new) 550ec6b5d7bSAndy Adamson goto out; 551ec6b5d7bSAndy Adamson 552ec6b5d7bSAndy Adamson memcpy(new, &tmp, sizeof(*new)); 553ec6b5d7bSAndy Adamson 554557ce264SAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 555efe0cb6dSJ. Bruce Fields cachesize = slot_bytes(&new->se_fchannel); 556557ce264SAndy Adamson for (i = 0; i < new->se_fchannel.maxreqs; i++) { 557557ce264SAndy Adamson sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); 558557ce264SAndy Adamson if (!sp) 559557ce264SAndy Adamson goto out_free; 560557ce264SAndy Adamson new->se_slots[i] = sp; 561557ce264SAndy Adamson } 562557ce264SAndy Adamson 563ec6b5d7bSAndy Adamson new->se_client = clp; 564ec6b5d7bSAndy Adamson gen_sessionid(new); 565ec6b5d7bSAndy Adamson idx = hash_sessionid(&new->se_sessionid); 566ec6b5d7bSAndy Adamson memcpy(clp->cl_sessionid.data, new->se_sessionid.data, 567ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 568ec6b5d7bSAndy Adamson 569ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 570ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 5719089f1b4SBenny Halevy spin_lock(&client_lock); 572ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 573ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 5749089f1b4SBenny Halevy spin_unlock(&client_lock); 575ec6b5d7bSAndy Adamson 576ec6b5d7bSAndy Adamson status = nfs_ok; 577ec6b5d7bSAndy Adamson out: 578ec6b5d7bSAndy Adamson return status; 579557ce264SAndy Adamson out_free: 580557ce264SAndy Adamson free_session_slots(new); 581557ce264SAndy Adamson kfree(new); 582557ce264SAndy Adamson goto out; 583ec6b5d7bSAndy Adamson } 584ec6b5d7bSAndy Adamson 5859089f1b4SBenny Halevy /* caller must hold client_lock */ 5865282fd72SMarc Eshel static struct nfsd4_session * 5875282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 5885282fd72SMarc Eshel { 5895282fd72SMarc Eshel struct nfsd4_session *elem; 5905282fd72SMarc Eshel int idx; 5915282fd72SMarc Eshel 5925282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 5935282fd72SMarc Eshel idx = hash_sessionid(sessionid); 5945282fd72SMarc Eshel dprintk("%s: idx is %d\n", __func__, idx); 5955282fd72SMarc Eshel /* Search in the appropriate list */ 5965282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 5975282fd72SMarc Eshel dump_sessionid("list traversal", &elem->se_sessionid); 5985282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 5995282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 6005282fd72SMarc Eshel return elem; 6015282fd72SMarc Eshel } 6025282fd72SMarc Eshel } 6035282fd72SMarc Eshel 6045282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 6055282fd72SMarc Eshel return NULL; 6065282fd72SMarc Eshel } 6075282fd72SMarc Eshel 6089089f1b4SBenny Halevy /* caller must hold client_lock */ 6097116ed6bSAndy Adamson static void 6105282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 6117116ed6bSAndy Adamson { 6127116ed6bSAndy Adamson list_del(&ses->se_hash); 6137116ed6bSAndy Adamson list_del(&ses->se_perclnt); 6145282fd72SMarc Eshel } 6155282fd72SMarc Eshel 6167116ed6bSAndy Adamson void 6177116ed6bSAndy Adamson free_session(struct kref *kref) 6187116ed6bSAndy Adamson { 6197116ed6bSAndy Adamson struct nfsd4_session *ses; 620dd829c45SJ. Bruce Fields int mem; 6217116ed6bSAndy Adamson 6227116ed6bSAndy Adamson ses = container_of(kref, struct nfsd4_session, se_ref); 623be98d1bbSAndy Adamson spin_lock(&nfsd_drc_lock); 624efe0cb6dSJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 625dd829c45SJ. Bruce Fields nfsd_drc_mem_used -= mem; 626be98d1bbSAndy Adamson spin_unlock(&nfsd_drc_lock); 627557ce264SAndy Adamson free_session_slots(ses); 6287116ed6bSAndy Adamson kfree(ses); 6297116ed6bSAndy Adamson } 6307116ed6bSAndy Adamson 6311da177e4SLinus Torvalds static inline void 6321da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 6331da177e4SLinus Torvalds { 6341da177e4SLinus Torvalds /* 6351da177e4SLinus Torvalds * Move client to the end to the LRU list. 6361da177e4SLinus Torvalds */ 6371da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 6381da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 6391da177e4SLinus Torvalds clp->cl_clientid.cl_id); 6401da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 6411da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 6451da177e4SLinus Torvalds static int 6461da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 6471da177e4SLinus Torvalds { 6481da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 6491da177e4SLinus Torvalds return 0; 65060adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 65160adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 6521da177e4SLinus Torvalds return 1; 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds 6551da177e4SLinus Torvalds /* 6561da177e4SLinus Torvalds * XXX Should we use a slab cache ? 6571da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 6581da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 6591da177e4SLinus Torvalds */ 66035bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 6611da177e4SLinus Torvalds { 6621da177e4SLinus Torvalds struct nfs4_client *clp; 6631da177e4SLinus Torvalds 66435bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 66535bba9a3SJ. Bruce Fields if (clp == NULL) 66635bba9a3SJ. Bruce Fields return NULL; 66735bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 66835bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 66935bba9a3SJ. Bruce Fields kfree(clp); 67035bba9a3SJ. Bruce Fields return NULL; 67135bba9a3SJ. Bruce Fields } 6721da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 6731da177e4SLinus Torvalds clp->cl_name.len = name.len; 6741da177e4SLinus Torvalds return clp; 6751da177e4SLinus Torvalds } 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds static inline void 6781da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 6791da177e4SLinus Torvalds { 6801da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 6811da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 68268e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 6831da177e4SLinus Torvalds kfree(clp->cl_name.data); 6841da177e4SLinus Torvalds kfree(clp); 6851da177e4SLinus Torvalds } 6861da177e4SLinus Torvalds 6871da177e4SLinus Torvalds static void 6881da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 6891da177e4SLinus Torvalds { 6901da177e4SLinus Torvalds struct nfs4_stateowner *sop; 6911da177e4SLinus Torvalds struct nfs4_delegation *dp; 6921da177e4SLinus Torvalds struct list_head reaplist; 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 6951da177e4SLinus Torvalds spin_lock(&recall_lock); 696ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 697ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 6981da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 6991da177e4SLinus Torvalds dp->dl_flock); 700ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 7011da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 7021da177e4SLinus Torvalds } 7031da177e4SLinus Torvalds spin_unlock(&recall_lock); 7041da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 7051da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 7061da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 7071da177e4SLinus Torvalds unhash_delegation(dp); 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds list_del(&clp->cl_idhash); 7101da177e4SLinus Torvalds list_del(&clp->cl_strhash); 7111da177e4SLinus Torvalds list_del(&clp->cl_lru); 712ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 713ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 714f044ff83SJ. Bruce Fields release_openowner(sop); 7151da177e4SLinus Torvalds } 716be1fdf6cSBenny Halevy spin_lock(&client_lock); 717c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 718c4bf7868SMarc Eshel struct nfsd4_session *ses; 719c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 720c4bf7868SMarc Eshel se_perclnt); 721be1fdf6cSBenny Halevy unhash_session(ses); 722be1fdf6cSBenny Halevy nfsd4_put_session(ses); 723c4bf7868SMarc Eshel } 724be1fdf6cSBenny Halevy spin_unlock(&client_lock); 725b5a1a81eSJ. Bruce Fields nfsd4_set_callback_client(clp, NULL); 7262bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 7272bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 728b12a05cbSJ. Bruce Fields free_client(clp); 7291da177e4SLinus Torvalds } 7301da177e4SLinus Torvalds 73135bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 73235bba9a3SJ. Bruce Fields { 73335bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 73435bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 7351da177e4SLinus Torvalds } 7361da177e4SLinus Torvalds 73735bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 73835bba9a3SJ. Bruce Fields { 7391da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 7401da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 7411da177e4SLinus Torvalds } 7421da177e4SLinus Torvalds 74335bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 74435bba9a3SJ. Bruce Fields { 7451da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 7461da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 7471da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 7481da177e4SLinus Torvalds get_group_info(target->cr_group_info); 7491da177e4SLinus Torvalds } 7501da177e4SLinus Torvalds 75135bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 752599e0a22SJ. Bruce Fields { 753a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 7541da177e4SLinus Torvalds } 7551da177e4SLinus Torvalds 7561da177e4SLinus Torvalds static int 757599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 758599e0a22SJ. Bruce Fields { 759599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 7601da177e4SLinus Torvalds } 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds static int 763599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 764599e0a22SJ. Bruce Fields { 765599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 7661da177e4SLinus Torvalds } 7671da177e4SLinus Torvalds 7681da177e4SLinus Torvalds /* XXX what about NGROUP */ 7691da177e4SLinus Torvalds static int 770599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 771599e0a22SJ. Bruce Fields { 772599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 7731da177e4SLinus Torvalds } 7741da177e4SLinus Torvalds 7755ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 7765ec7b46cSJ. Bruce Fields { 7775ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 7785ec7b46cSJ. Bruce Fields 7791da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 7801da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 7811da177e4SLinus Torvalds } 7821da177e4SLinus Torvalds 783deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 784deda2faaSJ. Bruce Fields { 785deda2faaSJ. Bruce Fields static u32 i; 7861da177e4SLinus Torvalds u32 *p; 7871da177e4SLinus Torvalds 7881da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 789deda2faaSJ. Bruce Fields *p++ = get_seconds(); 790deda2faaSJ. Bruce Fields *p++ = i++; 7911da177e4SLinus Torvalds } 7921da177e4SLinus Torvalds 793b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 794b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 795b09333c4SRicardo Labiaga { 796b09333c4SRicardo Labiaga struct nfs4_client *clp; 797b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 798b09333c4SRicardo Labiaga char *princ; 799b09333c4SRicardo Labiaga 800b09333c4SRicardo Labiaga clp = alloc_client(name); 801b09333c4SRicardo Labiaga if (clp == NULL) 802b09333c4SRicardo Labiaga return NULL; 803b09333c4SRicardo Labiaga 804b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 805b09333c4SRicardo Labiaga if (princ) { 806b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 807b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 808b09333c4SRicardo Labiaga free_client(clp); 809b09333c4SRicardo Labiaga return NULL; 810b09333c4SRicardo Labiaga } 811b09333c4SRicardo Labiaga } 812b09333c4SRicardo Labiaga 813b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 8142bf23875SJ. Bruce Fields atomic_set(&clp->cl_cb_set, 0); 815b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 816b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 817b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 818b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 819b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_sessions); 820b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 821b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 822b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 823b09333c4SRicardo Labiaga copy_verf(clp, verf); 824b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 825b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 826b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 827b09333c4SRicardo Labiaga gen_confirm(clp); 828b09333c4SRicardo Labiaga 829b09333c4SRicardo Labiaga return clp; 830b09333c4SRicardo Labiaga } 831b09333c4SRicardo Labiaga 83235bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 83335bba9a3SJ. Bruce Fields { 8341da177e4SLinus Torvalds if (name.len == 0) 8351da177e4SLinus Torvalds return 0; 8361da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 8372fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 8381da177e4SLinus Torvalds return 0; 8391da177e4SLinus Torvalds } 8401da177e4SLinus Torvalds return 1; 8411da177e4SLinus Torvalds } 8421da177e4SLinus Torvalds 843fd39ca9aSNeilBrown static void 8441da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 8451da177e4SLinus Torvalds { 8461da177e4SLinus Torvalds unsigned int idhashval; 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 8491da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8501da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 8511da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 8521da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds 855fd39ca9aSNeilBrown static void 8561da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 8571da177e4SLinus Torvalds { 8581da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8591da177e4SLinus Torvalds unsigned int strhashval; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 862f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 863a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 864328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 8651da177e4SLinus Torvalds renew_client(clp); 8661da177e4SLinus Torvalds } 8671da177e4SLinus Torvalds 8681da177e4SLinus Torvalds static struct nfs4_client * 8691da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 8701da177e4SLinus Torvalds { 8711da177e4SLinus Torvalds struct nfs4_client *clp; 8721da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8731da177e4SLinus Torvalds 8741da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 875599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8761da177e4SLinus Torvalds return clp; 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds return NULL; 8791da177e4SLinus Torvalds } 8801da177e4SLinus Torvalds 8811da177e4SLinus Torvalds static struct nfs4_client * 8821da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 8831da177e4SLinus Torvalds { 8841da177e4SLinus Torvalds struct nfs4_client *clp; 8851da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 888599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8891da177e4SLinus Torvalds return clp; 8901da177e4SLinus Torvalds } 8911da177e4SLinus Torvalds return NULL; 8921da177e4SLinus Torvalds } 8931da177e4SLinus Torvalds 894a1bcecd2SAndy Adamson /* 895a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 896a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 897a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 898a1bcecd2SAndy Adamson * 899a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 900a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 901a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 902a1bcecd2SAndy Adamson */ 903a1bcecd2SAndy Adamson static inline int 904a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 905a1bcecd2SAndy Adamson { 906a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 907a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 908a1bcecd2SAndy Adamson } 909a1bcecd2SAndy Adamson 91028ce6054SNeilBrown static struct nfs4_client * 911a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 912a1bcecd2SAndy Adamson bool use_exchange_id) 91328ce6054SNeilBrown { 91428ce6054SNeilBrown struct nfs4_client *clp; 91528ce6054SNeilBrown 91628ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 917a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 918a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 91928ce6054SNeilBrown return clp; 92028ce6054SNeilBrown } 92128ce6054SNeilBrown return NULL; 92228ce6054SNeilBrown } 92328ce6054SNeilBrown 92428ce6054SNeilBrown static struct nfs4_client * 925a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 926a1bcecd2SAndy Adamson bool use_exchange_id) 92728ce6054SNeilBrown { 92828ce6054SNeilBrown struct nfs4_client *clp; 92928ce6054SNeilBrown 93028ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 931a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 932a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 93328ce6054SNeilBrown return clp; 93428ce6054SNeilBrown } 93528ce6054SNeilBrown return NULL; 93628ce6054SNeilBrown } 93728ce6054SNeilBrown 938fd39ca9aSNeilBrown static void 939fbf4665fSJeff Layton gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) 9401da177e4SLinus Torvalds { 941c237dc03SJ. Bruce Fields struct nfs4_cb_conn *cb = &clp->cl_cb_conn; 9427077ecbaSJeff Layton unsigned short expected_family; 9431da177e4SLinus Torvalds 9447077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 9457077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 9467077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 9477077ecbaSJeff Layton expected_family = AF_INET; 9487077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 9497077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 9507077ecbaSJeff Layton expected_family = AF_INET6; 9517077ecbaSJeff Layton else 9521da177e4SLinus Torvalds goto out_err; 9531da177e4SLinus Torvalds 954aa9a4ec7SJeff Layton cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 955aa9a4ec7SJeff Layton se->se_callback_addr_len, 956aa9a4ec7SJeff Layton (struct sockaddr *) &cb->cb_addr, 957aa9a4ec7SJeff Layton sizeof(cb->cb_addr)); 958aa9a4ec7SJeff Layton 9597077ecbaSJeff Layton if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) 9601da177e4SLinus Torvalds goto out_err; 961aa9a4ec7SJeff Layton 962fbf4665fSJeff Layton if (cb->cb_addr.ss_family == AF_INET6) 963fbf4665fSJeff Layton ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; 964fbf4665fSJeff Layton 965ab52ae6dSAndy Adamson cb->cb_minorversion = 0; 9661da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 9671da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 9681da177e4SLinus Torvalds return; 9691da177e4SLinus Torvalds out_err: 970aa9a4ec7SJeff Layton cb->cb_addr.ss_family = AF_UNSPEC; 971aa9a4ec7SJeff Layton cb->cb_addrlen = 0; 972849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 9731da177e4SLinus Torvalds "will not receive delegations\n", 9741da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds return; 9771da177e4SLinus Torvalds } 9781da177e4SLinus Torvalds 979074fe897SAndy Adamson /* 980557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 981074fe897SAndy Adamson */ 982074fe897SAndy Adamson void 983074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 984074fe897SAndy Adamson { 985557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 986557ce264SAndy Adamson unsigned int base; 987074fe897SAndy Adamson 988557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 989074fe897SAndy Adamson 990557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 991557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 992bf864a31SAndy Adamson 993bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 994557ce264SAndy Adamson slot->sl_datalen = 0; 995bf864a31SAndy Adamson return; 996bf864a31SAndy Adamson } 997557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 998557ce264SAndy Adamson base = (char *)resp->cstate.datap - 999557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1000557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1001557ce264SAndy Adamson slot->sl_datalen)) 1002557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1003557ce264SAndy Adamson return; 1004074fe897SAndy Adamson } 1005074fe897SAndy Adamson 1006074fe897SAndy Adamson /* 1007abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1008abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1009abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1010abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1011abfabf8cSAndy Adamson * 1012074fe897SAndy Adamson */ 1013abfabf8cSAndy Adamson static __be32 1014abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1015abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1016074fe897SAndy Adamson { 1017abfabf8cSAndy Adamson struct nfsd4_op *op; 1018abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1019074fe897SAndy Adamson 1020abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1021557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1022abfabf8cSAndy Adamson 1023abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1024abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1025abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1026abfabf8cSAndy Adamson 1027abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1028557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1029abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1030abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1031abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1032074fe897SAndy Adamson } 1033abfabf8cSAndy Adamson return op->status; 1034074fe897SAndy Adamson } 1035074fe897SAndy Adamson 1036074fe897SAndy Adamson /* 1037557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1038557ce264SAndy Adamson * session values. 1039074fe897SAndy Adamson */ 1040074fe897SAndy Adamson __be32 1041bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1042bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1043074fe897SAndy Adamson { 1044557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1045074fe897SAndy Adamson __be32 status; 1046074fe897SAndy Adamson 1047557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1048074fe897SAndy Adamson 1049abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1050abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1051abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1052abfabf8cSAndy Adamson return status; 1053074fe897SAndy Adamson 1054557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1055557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1056074fe897SAndy Adamson 1057557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1058557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1059557ce264SAndy Adamson status = slot->sl_status; 1060074fe897SAndy Adamson 1061074fe897SAndy Adamson return status; 1062074fe897SAndy Adamson } 1063074fe897SAndy Adamson 10640733d213SAndy Adamson /* 10650733d213SAndy Adamson * Set the exchange_id flags returned by the server. 10660733d213SAndy Adamson */ 10670733d213SAndy Adamson static void 10680733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 10690733d213SAndy Adamson { 10700733d213SAndy Adamson /* pNFS is not supported */ 10710733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 10720733d213SAndy Adamson 10730733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 10740733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 10750733d213SAndy Adamson 10760733d213SAndy Adamson /* set the wire flags to return to client. */ 10770733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 10780733d213SAndy Adamson } 10790733d213SAndy Adamson 1080b37ad28bSAl Viro __be32 1081069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1082069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1083069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1084069b6ad4SAndy Adamson { 10850733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 10860733d213SAndy Adamson int status; 10870733d213SAndy Adamson unsigned int strhashval; 10880733d213SAndy Adamson char dname[HEXDIR_LEN]; 1089363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 10900733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1091363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 10920733d213SAndy Adamson 1093363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 10940733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1095363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 10960733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1097363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 10980733d213SAndy Adamson 10990733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 11000733d213SAndy Adamson return nfserr_inval; 11010733d213SAndy Adamson 11020733d213SAndy Adamson /* Currently only support SP4_NONE */ 11030733d213SAndy Adamson switch (exid->spa_how) { 11040733d213SAndy Adamson case SP4_NONE: 11050733d213SAndy Adamson break; 11060733d213SAndy Adamson case SP4_SSV: 11070733d213SAndy Adamson return nfserr_encr_alg_unsupp; 11080733d213SAndy Adamson default: 11090733d213SAndy Adamson BUG(); /* checked by xdr code */ 11100733d213SAndy Adamson case SP4_MACH_CRED: 11110733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 11120733d213SAndy Adamson } 11130733d213SAndy Adamson 11140733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 11150733d213SAndy Adamson 11160733d213SAndy Adamson if (status) 11170733d213SAndy Adamson goto error; 11180733d213SAndy Adamson 11190733d213SAndy Adamson strhashval = clientstr_hashval(dname); 11200733d213SAndy Adamson 11210733d213SAndy Adamson nfs4_lock_state(); 11220733d213SAndy Adamson status = nfs_ok; 11230733d213SAndy Adamson 1124a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 11250733d213SAndy Adamson if (conf) { 11260733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 11270733d213SAndy Adamson /* 18.35.4 case 8 */ 11280733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11290733d213SAndy Adamson status = nfserr_not_same; 11300733d213SAndy Adamson goto out; 11310733d213SAndy Adamson } 11320733d213SAndy Adamson /* Client reboot: destroy old state */ 11330733d213SAndy Adamson expire_client(conf); 11340733d213SAndy Adamson goto out_new; 11350733d213SAndy Adamson } 11360733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 11370733d213SAndy Adamson /* 18.35.4 case 9 */ 11380733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11390733d213SAndy Adamson status = nfserr_perm; 11400733d213SAndy Adamson goto out; 11410733d213SAndy Adamson } 11420733d213SAndy Adamson expire_client(conf); 11430733d213SAndy Adamson goto out_new; 11440733d213SAndy Adamson } 11450733d213SAndy Adamson /* 11460733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 11470733d213SAndy Adamson * confirmed client id (18.35.3). 11480733d213SAndy Adamson */ 11490733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 11500733d213SAndy Adamson 11510733d213SAndy Adamson /* 11520733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 11530733d213SAndy Adamson * Leave confirmed record intact and return same result. 11540733d213SAndy Adamson */ 11550733d213SAndy Adamson copy_verf(conf, &verf); 11560733d213SAndy Adamson new = conf; 11570733d213SAndy Adamson goto out_copy; 11586ddbbbfeSMike Sager } 11596ddbbbfeSMike Sager 11600733d213SAndy Adamson /* 18.35.4 case 7 */ 11610733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11620733d213SAndy Adamson status = nfserr_noent; 11630733d213SAndy Adamson goto out; 11640733d213SAndy Adamson } 11650733d213SAndy Adamson 1166a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 11670733d213SAndy Adamson if (unconf) { 11680733d213SAndy Adamson /* 11690733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 11700733d213SAndy Adamson * a new unconfirmed record should be generated regardless 11710733d213SAndy Adamson * of whether any properties have changed. 11720733d213SAndy Adamson */ 11730733d213SAndy Adamson expire_client(unconf); 11740733d213SAndy Adamson } 11750733d213SAndy Adamson 11760733d213SAndy Adamson out_new: 11770733d213SAndy Adamson /* Normal case */ 1178b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 11790733d213SAndy Adamson if (new == NULL) { 1180bdac86e2SAndy Adamson status = nfserr_serverfault; 11810733d213SAndy Adamson goto out; 11820733d213SAndy Adamson } 11830733d213SAndy Adamson 11840733d213SAndy Adamson gen_clid(new); 11850733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 11860733d213SAndy Adamson out_copy: 11870733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 11880733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 11890733d213SAndy Adamson 119038eb76a5SAndy Adamson exid->seqid = 1; 11910733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 11920733d213SAndy Adamson 11930733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 119449557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 11950733d213SAndy Adamson status = nfs_ok; 11960733d213SAndy Adamson 11970733d213SAndy Adamson out: 11980733d213SAndy Adamson nfs4_unlock_state(); 11990733d213SAndy Adamson error: 12000733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 12010733d213SAndy Adamson return status; 1202069b6ad4SAndy Adamson } 1203069b6ad4SAndy Adamson 1204b85d4c01SBenny Halevy static int 120588e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1206b85d4c01SBenny Halevy { 120788e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 120888e588d5SAndy Adamson slot_seqid); 1209b85d4c01SBenny Halevy 1210b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 121188e588d5SAndy Adamson if (slot_inuse) { 121288e588d5SAndy Adamson if (seqid == slot_seqid) 1213b85d4c01SBenny Halevy return nfserr_jukebox; 1214b85d4c01SBenny Halevy else 1215b85d4c01SBenny Halevy return nfserr_seq_misordered; 1216b85d4c01SBenny Halevy } 1217b85d4c01SBenny Halevy /* Normal */ 121888e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1219b85d4c01SBenny Halevy return nfs_ok; 1220b85d4c01SBenny Halevy /* Replay */ 122188e588d5SAndy Adamson if (seqid == slot_seqid) 1222b85d4c01SBenny Halevy return nfserr_replay_cache; 1223b85d4c01SBenny Halevy /* Wraparound */ 122488e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1225b85d4c01SBenny Halevy return nfs_ok; 1226b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1227b85d4c01SBenny Halevy return nfserr_seq_misordered; 1228b85d4c01SBenny Halevy } 1229b85d4c01SBenny Halevy 123049557cc7SAndy Adamson /* 123149557cc7SAndy Adamson * Cache the create session result into the create session single DRC 123249557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 123349557cc7SAndy Adamson * Do this for solo or embedded create session operations. 123449557cc7SAndy Adamson */ 123549557cc7SAndy Adamson static void 123649557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 123749557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 123849557cc7SAndy Adamson { 123949557cc7SAndy Adamson slot->sl_status = nfserr; 124049557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 124149557cc7SAndy Adamson } 124249557cc7SAndy Adamson 124349557cc7SAndy Adamson static __be32 124449557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 124549557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 124649557cc7SAndy Adamson { 124749557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 124849557cc7SAndy Adamson return slot->sl_status; 124949557cc7SAndy Adamson } 125049557cc7SAndy Adamson 1251069b6ad4SAndy Adamson __be32 1252069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1253069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1254069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1255069b6ad4SAndy Adamson { 1256363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1257ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 125849557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 1259ec6b5d7bSAndy Adamson int status = 0; 1260ec6b5d7bSAndy Adamson 1261ec6b5d7bSAndy Adamson nfs4_lock_state(); 1262ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1263ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1264ec6b5d7bSAndy Adamson 1265ec6b5d7bSAndy Adamson if (conf) { 126649557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 126749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 126838eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1269ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 127049557cc7SAndy Adamson cs_slot->sl_seqid); 127138eb76a5SAndy Adamson /* Return the cached reply status */ 127249557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 127338eb76a5SAndy Adamson goto out; 127449557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1275ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1276ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1277ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 127849557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1279ec6b5d7bSAndy Adamson goto out; 1280ec6b5d7bSAndy Adamson } 128149557cc7SAndy Adamson cs_slot->sl_seqid++; 1282ec6b5d7bSAndy Adamson } else if (unconf) { 1283ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1284363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1285ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1286ec6b5d7bSAndy Adamson goto out; 1287ec6b5d7bSAndy Adamson } 1288ec6b5d7bSAndy Adamson 128949557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 129049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 129138eb76a5SAndy Adamson if (status) { 129238eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1293ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 129449557cc7SAndy Adamson goto out_cache; 1295ec6b5d7bSAndy Adamson } 1296ec6b5d7bSAndy Adamson 129749557cc7SAndy Adamson cs_slot->sl_seqid++; /* from 0 to 1 */ 1298ec6b5d7bSAndy Adamson move_to_confirmed(unconf); 1299ec6b5d7bSAndy Adamson 130038524ab3SAndy Adamson if (cr_ses->flags & SESSION4_BACK_CHAN) { 13012bf23875SJ. Bruce Fields unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; 13022bf23875SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 130338524ab3SAndy Adamson rpc_copy_addr( 130438524ab3SAndy Adamson (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, 130538524ab3SAndy Adamson sa); 130638524ab3SAndy Adamson unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 130738524ab3SAndy Adamson unconf->cl_cb_conn.cb_minorversion = 130838524ab3SAndy Adamson cstate->minorversion; 130938524ab3SAndy Adamson unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; 13102a1d1b59SRicardo Labiaga unconf->cl_cb_seq_nr = 1; 13114b21d0deSJ. Bruce Fields nfsd4_probe_callback(unconf, &unconf->cl_cb_conn); 131238524ab3SAndy Adamson } 1313ec6b5d7bSAndy Adamson conf = unconf; 1314ec6b5d7bSAndy Adamson } else { 1315ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1316ec6b5d7bSAndy Adamson goto out; 1317ec6b5d7bSAndy Adamson } 1318ec6b5d7bSAndy Adamson 1319408b79bcSJ. Bruce Fields /* 1320408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1321408b79bcSJ. Bruce Fields */ 1322408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1323408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1324408b79bcSJ. Bruce Fields 1325ec6b5d7bSAndy Adamson status = alloc_init_session(rqstp, conf, cr_ses); 1326ec6b5d7bSAndy Adamson if (status) 1327ec6b5d7bSAndy Adamson goto out; 1328ec6b5d7bSAndy Adamson 1329ec6b5d7bSAndy Adamson memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, 1330ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 133149557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1332ec6b5d7bSAndy Adamson 133349557cc7SAndy Adamson out_cache: 133449557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 133549557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1336ec6b5d7bSAndy Adamson out: 1337ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1338ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1339ec6b5d7bSAndy Adamson return status; 1340069b6ad4SAndy Adamson } 1341069b6ad4SAndy Adamson 134257716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 134357716355SJ. Bruce Fields { 134457716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 134557716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 134657716355SJ. Bruce Fields 134757716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 134857716355SJ. Bruce Fields } 134957716355SJ. Bruce Fields 13505d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 13515d4cec2fSJ. Bruce Fields { 13525d4cec2fSJ. Bruce Fields if (!session) 13535d4cec2fSJ. Bruce Fields return 0; 13545d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 13555d4cec2fSJ. Bruce Fields } 13565d4cec2fSJ. Bruce Fields 1357069b6ad4SAndy Adamson __be32 1358069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1359069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1360069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1361069b6ad4SAndy Adamson { 1362e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1363e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1364e10e0cfcSBenny Halevy 1365e10e0cfcSBenny Halevy /* Notes: 1366e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1367e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1368e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1369e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1370e10e0cfcSBenny Halevy */ 1371e10e0cfcSBenny Halevy 13725d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 137357716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 137457716355SJ. Bruce Fields return nfserr_not_only_op; 137557716355SJ. Bruce Fields } 1376e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 13779089f1b4SBenny Halevy spin_lock(&client_lock); 1378e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1379e10e0cfcSBenny Halevy if (!ses) { 13809089f1b4SBenny Halevy spin_unlock(&client_lock); 1381e10e0cfcSBenny Halevy goto out; 1382e10e0cfcSBenny Halevy } 1383e10e0cfcSBenny Halevy 1384e10e0cfcSBenny Halevy unhash_session(ses); 13859089f1b4SBenny Halevy spin_unlock(&client_lock); 1386e10e0cfcSBenny Halevy 1387e10e0cfcSBenny Halevy /* wait for callbacks */ 1388b5a1a81eSJ. Bruce Fields nfsd4_set_callback_client(ses->se_client, NULL); 1389e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1390e10e0cfcSBenny Halevy status = nfs_ok; 1391e10e0cfcSBenny Halevy out: 1392e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1393e10e0cfcSBenny Halevy return status; 1394069b6ad4SAndy Adamson } 1395069b6ad4SAndy Adamson 1396069b6ad4SAndy Adamson __be32 1397b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1398069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1399069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1400069b6ad4SAndy Adamson { 1401f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1402b85d4c01SBenny Halevy struct nfsd4_session *session; 1403b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1404b85d4c01SBenny Halevy int status; 1405b85d4c01SBenny Halevy 1406f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1407f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1408f9bb94c4SAndy Adamson 14099089f1b4SBenny Halevy spin_lock(&client_lock); 1410b85d4c01SBenny Halevy status = nfserr_badsession; 1411b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1412b85d4c01SBenny Halevy if (!session) 1413b85d4c01SBenny Halevy goto out; 1414b85d4c01SBenny Halevy 1415b85d4c01SBenny Halevy status = nfserr_badslot; 14166c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1417b85d4c01SBenny Halevy goto out; 1418b85d4c01SBenny Halevy 1419557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1420b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1421b85d4c01SBenny Halevy 1422a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1423a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1424a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1425a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1426a8dfdaebSAndy Adamson 142788e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1428b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1429b85d4c01SBenny Halevy cstate->slot = slot; 1430b85d4c01SBenny Halevy cstate->session = session; 1431da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1432557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1433bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1434da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1435aaf84eb9SBenny Halevy goto out; 1436b85d4c01SBenny Halevy } 1437b85d4c01SBenny Halevy if (status) 1438b85d4c01SBenny Halevy goto out; 1439b85d4c01SBenny Halevy 1440b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1441b85d4c01SBenny Halevy slot->sl_inuse = true; 1442b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1443557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1444b85d4c01SBenny Halevy 1445b85d4c01SBenny Halevy cstate->slot = slot; 1446b85d4c01SBenny Halevy cstate->session = session; 1447b85d4c01SBenny Halevy 1448b85d4c01SBenny Halevy out: 144926c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 145026c0c75eSJ. Bruce Fields if (cstate->session) 145126c0c75eSJ. Bruce Fields nfsd4_get_session(cstate->session); 14529089f1b4SBenny Halevy spin_unlock(&client_lock); 1453aaf84eb9SBenny Halevy /* Renew the clientid on success and on replay */ 1454aaf84eb9SBenny Halevy if (cstate->session) { 1455aaf84eb9SBenny Halevy nfs4_lock_state(); 1456aaf84eb9SBenny Halevy renew_client(session->se_client); 1457aaf84eb9SBenny Halevy nfs4_unlock_state(); 1458aaf84eb9SBenny Halevy } 1459b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1460b85d4c01SBenny Halevy return status; 1461069b6ad4SAndy Adamson } 1462069b6ad4SAndy Adamson 1463069b6ad4SAndy Adamson __be32 1464b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1465b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 14661da177e4SLinus Torvalds { 1467363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14681da177e4SLinus Torvalds struct xdr_netobj clname = { 14691da177e4SLinus Torvalds .len = setclid->se_namelen, 14701da177e4SLinus Torvalds .data = setclid->se_name, 14711da177e4SLinus Torvalds }; 14721da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 14731da177e4SLinus Torvalds unsigned int strhashval; 147428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1475b37ad28bSAl Viro __be32 status; 1476a55370a3SNeilBrown char dname[HEXDIR_LEN]; 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds if (!check_name(clname)) 147973aea4ecSNeil Brown return nfserr_inval; 14801da177e4SLinus Torvalds 1481a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1482a55370a3SNeilBrown if (status) 148373aea4ecSNeil Brown return status; 1484a55370a3SNeilBrown 14851da177e4SLinus Torvalds /* 14861da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 14871da177e4SLinus Torvalds * We get here on a DRC miss. 14881da177e4SLinus Torvalds */ 14891da177e4SLinus Torvalds 1490a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 14911da177e4SLinus Torvalds 14921da177e4SLinus Torvalds nfs4_lock_state(); 1493a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 149428ce6054SNeilBrown if (conf) { 1495a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 14961da177e4SLinus Torvalds status = nfserr_clid_inuse; 1497026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1498363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1499363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1500363168b4SJeff Layton sizeof(addr_str)); 1501026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1502363168b4SJeff Layton "at %s\n", addr_str); 15031da177e4SLinus Torvalds goto out; 15041da177e4SLinus Torvalds } 15051da177e4SLinus Torvalds } 1506a186e767SJ. Bruce Fields /* 1507a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1508a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1509a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1510a186e767SJ. Bruce Fields */ 1511a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 15121da177e4SLinus Torvalds status = nfserr_resource; 15131da177e4SLinus Torvalds if (!conf) { 15141da177e4SLinus Torvalds /* 1515a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1516a186e767SJ. Bruce Fields * placed first, because it is the normal case 15171da177e4SLinus Torvalds */ 15181da177e4SLinus Torvalds if (unconf) 15191da177e4SLinus Torvalds expire_client(unconf); 1520b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1521a55370a3SNeilBrown if (new == NULL) 15221da177e4SLinus Torvalds goto out; 15231da177e4SLinus Torvalds gen_clid(new); 1524599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 15251da177e4SLinus Torvalds /* 1526a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1527a186e767SJ. Bruce Fields * probable callback update 15281da177e4SLinus Torvalds */ 152931f4a6c1SNeilBrown if (unconf) { 153031f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 153131f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 153231f4a6c1SNeilBrown * This has the advantage that there is at most 153331f4a6c1SNeilBrown * one {*x***} in either list at any time. 153431f4a6c1SNeilBrown */ 15351da177e4SLinus Torvalds expire_client(unconf); 15361da177e4SLinus Torvalds } 1537b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1538a55370a3SNeilBrown if (new == NULL) 15391da177e4SLinus Torvalds goto out; 15401da177e4SLinus Torvalds copy_clid(new, conf); 15411da177e4SLinus Torvalds } else if (!unconf) { 15421da177e4SLinus Torvalds /* 1543a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1544a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1545a186e767SJ. Bruce Fields * confirmed. 15461da177e4SLinus Torvalds */ 1547b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1548a55370a3SNeilBrown if (new == NULL) 15491da177e4SLinus Torvalds goto out; 15501da177e4SLinus Torvalds gen_clid(new); 155149ba8781SJ. Bruce Fields } else { 15521da177e4SLinus Torvalds /* 1553a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1554a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1555a186e767SJ. Bruce Fields * confirmed. 15561da177e4SLinus Torvalds */ 15571da177e4SLinus Torvalds expire_client(unconf); 1558b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1559a55370a3SNeilBrown if (new == NULL) 15601da177e4SLinus Torvalds goto out; 15611da177e4SLinus Torvalds gen_clid(new); 15621da177e4SLinus Torvalds } 1563fbf4665fSJeff Layton gen_callback(new, setclid, rpc_get_scope_id(sa)); 1564c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 15651da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 15661da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 15671da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 15681da177e4SLinus Torvalds status = nfs_ok; 15691da177e4SLinus Torvalds out: 15701da177e4SLinus Torvalds nfs4_unlock_state(); 15711da177e4SLinus Torvalds return status; 15721da177e4SLinus Torvalds } 15731da177e4SLinus Torvalds 15741da177e4SLinus Torvalds 15751da177e4SLinus Torvalds /* 1576a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1577a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1578a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 15791da177e4SLinus Torvalds */ 1580b37ad28bSAl Viro __be32 1581b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1582b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1583b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 15841da177e4SLinus Torvalds { 1585363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 158621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 15871da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 15881da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1589b37ad28bSAl Viro __be32 status; 15901da177e4SLinus Torvalds 15911da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 15921da177e4SLinus Torvalds return nfserr_stale_clientid; 15931da177e4SLinus Torvalds /* 15941da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 15951da177e4SLinus Torvalds * We get here on a DRC miss. 15961da177e4SLinus Torvalds */ 15971da177e4SLinus Torvalds 15981da177e4SLinus Torvalds nfs4_lock_state(); 159921ab45a4SNeilBrown 160021ab45a4SNeilBrown conf = find_confirmed_client(clid); 160121ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 160221ab45a4SNeilBrown 160322de4d83SNeilBrown status = nfserr_clid_inuse; 1604363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 16051da177e4SLinus Torvalds goto out; 1606363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 16071da177e4SLinus Torvalds goto out; 160821ab45a4SNeilBrown 1609a186e767SJ. Bruce Fields /* 1610a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1611a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1612a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1613a186e767SJ. Bruce Fields */ 1614366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1615a186e767SJ. Bruce Fields /* 1616a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1617a186e767SJ. Bruce Fields * callback update 16187c79f737SNeilBrown */ 1619599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 16201da177e4SLinus Torvalds status = nfserr_clid_inuse; 16211da177e4SLinus Torvalds else { 16222bf23875SJ. Bruce Fields atomic_set(&conf->cl_cb_set, 0); 16234b21d0deSJ. Bruce Fields nfsd4_probe_callback(conf, &unconf->cl_cb_conn); 16241a69c179SNeilBrown expire_client(unconf); 16251da177e4SLinus Torvalds status = nfs_ok; 16261a69c179SNeilBrown 16271da177e4SLinus Torvalds } 1628f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1629a186e767SJ. Bruce Fields /* 1630a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1631a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1632a186e767SJ. Bruce Fields * do nothing. 16337c79f737SNeilBrown */ 1634599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 16351da177e4SLinus Torvalds status = nfserr_clid_inuse; 163621ab45a4SNeilBrown else 16371da177e4SLinus Torvalds status = nfs_ok; 16387c79f737SNeilBrown } else if (!conf && unconf 1639599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1640a186e767SJ. Bruce Fields /* 1641a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1642a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 16431da177e4SLinus Torvalds */ 1644599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 16451da177e4SLinus Torvalds status = nfserr_clid_inuse; 16461da177e4SLinus Torvalds } else { 16471a69c179SNeilBrown unsigned int hash = 16481a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 16491a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1650a1bcecd2SAndy Adamson hash, false); 16511a69c179SNeilBrown if (conf) { 1652c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 16531a69c179SNeilBrown expire_client(conf); 16541a69c179SNeilBrown } 16551da177e4SLinus Torvalds move_to_confirmed(unconf); 165621ab45a4SNeilBrown conf = unconf; 16574b21d0deSJ. Bruce Fields nfsd4_probe_callback(conf, &conf->cl_cb_conn); 16581a69c179SNeilBrown status = nfs_ok; 16591da177e4SLinus Torvalds } 1660599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1661599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 16627c79f737SNeilBrown &confirm)))) { 1663a186e767SJ. Bruce Fields /* 1664a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1665a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 16661da177e4SLinus Torvalds */ 16671da177e4SLinus Torvalds status = nfserr_stale_clientid; 16687c79f737SNeilBrown } else { 16691da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 167022de4d83SNeilBrown status = nfserr_clid_inuse; 167108e8987cSNeilBrown } 16721da177e4SLinus Torvalds out: 16731da177e4SLinus Torvalds nfs4_unlock_state(); 16741da177e4SLinus Torvalds return status; 16751da177e4SLinus Torvalds } 16761da177e4SLinus Torvalds 16771da177e4SLinus Torvalds /* OPEN Share state helper functions */ 16781da177e4SLinus Torvalds static inline struct nfs4_file * 16791da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 16801da177e4SLinus Torvalds { 16811da177e4SLinus Torvalds struct nfs4_file *fp; 16821da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 16831da177e4SLinus Torvalds 1684e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1685e60d4398SNeilBrown if (fp) { 16868b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 16871da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 16888beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 16898beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 16908b671b80SJ. Bruce Fields spin_lock(&recall_lock); 16911da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 16928b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 16931da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 16941da177e4SLinus Torvalds fp->fi_id = current_fileid++; 169547f9940cSMeelap Shah fp->fi_had_conflict = false; 16961da177e4SLinus Torvalds return fp; 16971da177e4SLinus Torvalds } 16981da177e4SLinus Torvalds return NULL; 16991da177e4SLinus Torvalds } 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds static void 1702e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1703e60d4398SNeilBrown { 1704e60d4398SNeilBrown if (*slab == NULL) 1705e60d4398SNeilBrown return; 17061a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1707e60d4398SNeilBrown *slab = NULL; 1708e60d4398SNeilBrown } 1709e60d4398SNeilBrown 1710e8ff2a84SJ. Bruce Fields void 1711e60d4398SNeilBrown nfsd4_free_slabs(void) 1712e60d4398SNeilBrown { 1713e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1714e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 17155ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 17165b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1717e60d4398SNeilBrown } 17181da177e4SLinus Torvalds 17191da177e4SLinus Torvalds static int 17201da177e4SLinus Torvalds nfsd4_init_slabs(void) 17211da177e4SLinus Torvalds { 17221da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 172320c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1724e60d4398SNeilBrown if (stateowner_slab == NULL) 1725e60d4398SNeilBrown goto out_nomem; 1726e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 172720c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1728e60d4398SNeilBrown if (file_slab == NULL) 1729e60d4398SNeilBrown goto out_nomem; 17305ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 173120c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 17325ac049acSNeilBrown if (stateid_slab == NULL) 17335ac049acSNeilBrown goto out_nomem; 17345b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 173520c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 17365b2d21c1SNeilBrown if (deleg_slab == NULL) 17375b2d21c1SNeilBrown goto out_nomem; 1738e60d4398SNeilBrown return 0; 1739e60d4398SNeilBrown out_nomem: 1740e60d4398SNeilBrown nfsd4_free_slabs(); 17411da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 17421da177e4SLinus Torvalds return -ENOMEM; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds 17451da177e4SLinus Torvalds void 17461da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 17471da177e4SLinus Torvalds { 17481da177e4SLinus Torvalds struct nfs4_stateowner *sop = 17491da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 17501da177e4SLinus Torvalds kfree(sop->so_owner.data); 17511da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 17521da177e4SLinus Torvalds } 17531da177e4SLinus Torvalds 17541da177e4SLinus Torvalds static inline struct nfs4_stateowner * 17551da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 17561da177e4SLinus Torvalds { 17571da177e4SLinus Torvalds struct nfs4_stateowner *sop; 17581da177e4SLinus Torvalds 17591da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 17601da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 17611da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 17621da177e4SLinus Torvalds sop->so_owner.len = owner->len; 17631da177e4SLinus Torvalds kref_init(&sop->so_ref); 17641da177e4SLinus Torvalds return sop; 17651da177e4SLinus Torvalds } 17661da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 17671da177e4SLinus Torvalds } 17681da177e4SLinus Torvalds return NULL; 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds static struct nfs4_stateowner * 17721da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 17731da177e4SLinus Torvalds struct nfs4_stateowner *sop; 17741da177e4SLinus Torvalds struct nfs4_replay *rp; 17751da177e4SLinus Torvalds unsigned int idhashval; 17761da177e4SLinus Torvalds 17771da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 17781da177e4SLinus Torvalds return NULL; 17791da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 17801da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 17811da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 17821da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1783ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1784ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 17851da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 17861da177e4SLinus Torvalds sop->so_time = 0; 17871da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 17881da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1789ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 17901da177e4SLinus Torvalds sop->so_is_open_owner = 1; 17911da177e4SLinus Torvalds sop->so_id = current_ownerid++; 17921da177e4SLinus Torvalds sop->so_client = clp; 17931da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 17941da177e4SLinus Torvalds sop->so_confirmed = 0; 17951da177e4SLinus Torvalds rp = &sop->so_replay; 1796de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 17971da177e4SLinus Torvalds rp->rp_buflen = 0; 17981da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 17991da177e4SLinus Torvalds return sop; 18001da177e4SLinus Torvalds } 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds static inline void 18031da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 18041da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 18051da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1808ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1809ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 18101da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 18111da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1812ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 18138beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 18141da177e4SLinus Torvalds stp->st_stateowner = sop; 181513cd2184SNeilBrown get_nfs4_file(fp); 18161da177e4SLinus Torvalds stp->st_file = fp; 181778155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 18181da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 18191da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 18201da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 18211da177e4SLinus Torvalds stp->st_access_bmap = 0; 18221da177e4SLinus Torvalds stp->st_deny_bmap = 0; 182384459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 182484459a11SAndy Adamson &stp->st_access_bmap); 18251da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 18264c4cd222SNeilBrown stp->st_openstp = NULL; 18271da177e4SLinus Torvalds } 18281da177e4SLinus Torvalds 18291da177e4SLinus Torvalds static void 18301da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 18311da177e4SLinus Torvalds { 18321da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 18331da177e4SLinus Torvalds 1834358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 18351da177e4SLinus Torvalds sop->so_time = get_seconds(); 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds static int 1839599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1840599e0a22SJ. Bruce Fields clientid_t *clid) 1841599e0a22SJ. Bruce Fields { 1842599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1843599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1844599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 18451da177e4SLinus Torvalds } 18461da177e4SLinus Torvalds 18471da177e4SLinus Torvalds static struct nfs4_stateowner * 18481da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 18491da177e4SLinus Torvalds { 18501da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 18511da177e4SLinus Torvalds 18521da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1853599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 18541da177e4SLinus Torvalds return so; 18551da177e4SLinus Torvalds } 18561da177e4SLinus Torvalds return NULL; 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds 18591da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 18601da177e4SLinus Torvalds static struct nfs4_file * 18611da177e4SLinus Torvalds find_file(struct inode *ino) 18621da177e4SLinus Torvalds { 18631da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 18641da177e4SLinus Torvalds struct nfs4_file *fp; 18651da177e4SLinus Torvalds 18668b671b80SJ. Bruce Fields spin_lock(&recall_lock); 18671da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 186813cd2184SNeilBrown if (fp->fi_inode == ino) { 186913cd2184SNeilBrown get_nfs4_file(fp); 18708b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 18711da177e4SLinus Torvalds return fp; 18721da177e4SLinus Torvalds } 187313cd2184SNeilBrown } 18748b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 18751da177e4SLinus Torvalds return NULL; 18761da177e4SLinus Torvalds } 18771da177e4SLinus Torvalds 1878d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 1879ba5a6a19SJ. Bruce Fields { 1880d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 18818838dc43SJ. Bruce Fields return 0; 1882d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 1883d87a8adeSAndy Adamson return 0; 1884d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 1885d87a8adeSAndy Adamson if (minorversion && x) { 1886d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 1887d87a8adeSAndy Adamson return 0; 1888d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 1889d87a8adeSAndy Adamson return 0; 1890d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 1891d87a8adeSAndy Adamson } 1892d87a8adeSAndy Adamson if (x) 18938838dc43SJ. Bruce Fields return 0; 18948838dc43SJ. Bruce Fields return 1; 1895ba5a6a19SJ. Bruce Fields } 1896ba5a6a19SJ. Bruce Fields 18978838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1898ba5a6a19SJ. Bruce Fields { 18998838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 19008838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1901ba5a6a19SJ. Bruce Fields } 19021da177e4SLinus Torvalds 19034f83aa30SJ. Bruce Fields /* 19044f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 19054f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 19064f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 19074f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 19084f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 19094f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 19104f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 19114f83aa30SJ. Bruce Fields * 19124f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 19134f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 19144f83aa30SJ. Bruce Fields * 19154f83aa30SJ. Bruce Fields * OPEN allow read, deny write 19164f83aa30SJ. Bruce Fields * OPEN allow both, deny none 19174f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 19184f83aa30SJ. Bruce Fields * 19194f83aa30SJ. Bruce Fields * which we should reject. 19204f83aa30SJ. Bruce Fields */ 1921fd39ca9aSNeilBrown static void 19221da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 19231da177e4SLinus Torvalds int i; 19241da177e4SLinus Torvalds 19251da177e4SLinus Torvalds *access = 0; 19261da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 19271da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19281da177e4SLinus Torvalds *access |= i; 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds } 19311da177e4SLinus Torvalds 1932fd39ca9aSNeilBrown static void 19331da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 19341da177e4SLinus Torvalds int i; 19351da177e4SLinus Torvalds 19361da177e4SLinus Torvalds *deny = 0; 19371da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 19381da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19391da177e4SLinus Torvalds *deny |= i ; 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds 19431da177e4SLinus Torvalds static int 19441da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 19451da177e4SLinus Torvalds unsigned int access, deny; 19461da177e4SLinus Torvalds 19471da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 19481da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 19491da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 19501da177e4SLinus Torvalds return 0; 19511da177e4SLinus Torvalds return 1; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds /* 19551da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 19561da177e4SLinus Torvalds * WRITE with all zero or all one stateid 19571da177e4SLinus Torvalds */ 1958b37ad28bSAl Viro static __be32 19591da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 19601da177e4SLinus Torvalds { 19611da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 19621da177e4SLinus Torvalds struct nfs4_file *fp; 19631da177e4SLinus Torvalds struct nfs4_stateid *stp; 1964b37ad28bSAl Viro __be32 ret; 19651da177e4SLinus Torvalds 19661da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds fp = find_file(ino); 196913cd2184SNeilBrown if (!fp) 197013cd2184SNeilBrown return nfs_ok; 1971b700949bSNeilBrown ret = nfserr_locked; 19721da177e4SLinus Torvalds /* Search for conflicting share reservations */ 19738beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 19741da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 19751da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 197613cd2184SNeilBrown goto out; 19771da177e4SLinus Torvalds } 197813cd2184SNeilBrown ret = nfs_ok; 197913cd2184SNeilBrown out: 198013cd2184SNeilBrown put_nfs4_file(fp); 198113cd2184SNeilBrown return ret; 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds static inline void 19851da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 19861da177e4SLinus Torvalds { 19871da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1988aceaf78dSDave Hansen drop_file_write_access(filp); 198942e49608SWu Fengguang spin_lock(&filp->f_lock); 19901da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 199142e49608SWu Fengguang spin_unlock(&filp->f_lock); 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds 19951da177e4SLinus Torvalds /* 19961da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 19971da177e4SLinus Torvalds * by the lease (file_lock) 19981da177e4SLinus Torvalds * 19991da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 20001da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 20011da177e4SLinus Torvalds * lease. 20021da177e4SLinus Torvalds */ 20031da177e4SLinus Torvalds static 20041da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 20051da177e4SLinus Torvalds { 20061da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 20071da177e4SLinus Torvalds 20081da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 20091da177e4SLinus Torvalds if (!dp) 20101da177e4SLinus Torvalds return; 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 20131da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 20141da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 20151da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 20161da177e4SLinus Torvalds * it's safe to take a reference: */ 20171da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 20181da177e4SLinus Torvalds 20191da177e4SLinus Torvalds spin_lock(&recall_lock); 20201da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 20211da177e4SLinus Torvalds spin_unlock(&recall_lock); 20221da177e4SLinus Torvalds 20231da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 20241da177e4SLinus Torvalds dp->dl_time = get_seconds(); 20251da177e4SLinus Torvalds 20260272e1fdSJ. Bruce Fields /* 20270272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 20280272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 20290272e1fdSJ. Bruce Fields * in time. 20300272e1fdSJ. Bruce Fields */ 20310272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 20321da177e4SLinus Torvalds 203363e4863fSJ. Bruce Fields dp->dl_file->fi_had_conflict = true; 203463e4863fSJ. Bruce Fields nfsd4_cb_recall(dp); 20351da177e4SLinus Torvalds } 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds /* 20381da177e4SLinus Torvalds * The file_lock is being reapd. 20391da177e4SLinus Torvalds * 20401da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 20411da177e4SLinus Torvalds */ 20421da177e4SLinus Torvalds static 20431da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 20441da177e4SLinus Torvalds { 20451da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 20461da177e4SLinus Torvalds 20471da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 20481da177e4SLinus Torvalds 20491da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 20501da177e4SLinus Torvalds return; 20511da177e4SLinus Torvalds dp->dl_flock = NULL; 20521da177e4SLinus Torvalds } 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvalds /* 20551da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 20561da177e4SLinus Torvalds * 2057a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 20581da177e4SLinus Torvalds */ 20591da177e4SLinus Torvalds static 20601da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 20611da177e4SLinus Torvalds { 20621da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 20651da177e4SLinus Torvalds if (!dp) 20661da177e4SLinus Torvalds return; 20671da177e4SLinus Torvalds dp->dl_flock = new; 20681da177e4SLinus Torvalds } 20691da177e4SLinus Torvalds 20701da177e4SLinus Torvalds /* 2071a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 20721da177e4SLinus Torvalds */ 20731da177e4SLinus Torvalds static 20741da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 20751da177e4SLinus Torvalds { 20761da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 20771da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 20781da177e4SLinus Torvalds struct nfs4_delegation *tryd = 20791da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 20801da177e4SLinus Torvalds 20811da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 20821da177e4SLinus Torvalds return 0; 20831da177e4SLinus Torvalds 20841da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 20851da177e4SLinus Torvalds } 20861da177e4SLinus Torvalds 20871da177e4SLinus Torvalds 20881da177e4SLinus Torvalds static 20891da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 20901da177e4SLinus Torvalds { 20911da177e4SLinus Torvalds if (arg & F_UNLCK) 20921da177e4SLinus Torvalds return lease_modify(onlist, arg); 20931da177e4SLinus Torvalds else 20941da177e4SLinus Torvalds return -EAGAIN; 20951da177e4SLinus Torvalds } 20961da177e4SLinus Torvalds 20977b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 20981da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 20991da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 21001da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 21011da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 21021da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 21031da177e4SLinus Torvalds }; 21041da177e4SLinus Torvalds 21051da177e4SLinus Torvalds 2106b37ad28bSAl Viro __be32 21076668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 21086668958fSAndy Adamson struct nfsd4_open *open) 21091da177e4SLinus Torvalds { 21101da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 21111da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 21121da177e4SLinus Torvalds unsigned int strhashval; 21131da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 21141da177e4SLinus Torvalds 21151da177e4SLinus Torvalds if (!check_name(open->op_owner)) 21160f442aa2SJ. Bruce Fields return nfserr_inval; 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 21191da177e4SLinus Torvalds return nfserr_stale_clientid; 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 21221da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 21231da177e4SLinus Torvalds open->op_stateowner = sop; 21240f442aa2SJ. Bruce Fields if (!sop) { 21250f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 21260f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 21270f442aa2SJ. Bruce Fields if (clp == NULL) 21280f442aa2SJ. Bruce Fields return nfserr_expired; 21290f442aa2SJ. Bruce Fields goto renew; 21300f442aa2SJ. Bruce Fields } 21316668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 21326668958fSAndy Adamson if (nfsd4_has_session(cstate)) 21336668958fSAndy Adamson goto renew; 2134ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 21350f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2136ae8b6253SJ. Bruce Fields clp = sop->so_client; 2137f044ff83SJ. Bruce Fields release_openowner(sop); 21380f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2139ae8b6253SJ. Bruce Fields goto renew; 21400f442aa2SJ. Bruce Fields } 21410f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 21421da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2143a90b061cSAl Viro return nfserr_replay_me; 21441da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 21451da177e4SLinus Torvalds * that we don't even have replay data saved! 21461da177e4SLinus Torvalds * Therefore, we have no choice but to continue 21471da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 21481da177e4SLinus Torvalds * fail again for the same reason. 21491da177e4SLinus Torvalds */ 21500f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 21511da177e4SLinus Torvalds goto renew; 21521da177e4SLinus Torvalds } 21530f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 21540f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 21550f442aa2SJ. Bruce Fields renew: 21560f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 21571da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 21581da177e4SLinus Torvalds if (sop == NULL) 21590f442aa2SJ. Bruce Fields return nfserr_resource; 21601da177e4SLinus Torvalds open->op_stateowner = sop; 21610f442aa2SJ. Bruce Fields } 21620f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 21631da177e4SLinus Torvalds renew_client(sop->so_client); 21640f442aa2SJ. Bruce Fields return nfs_ok; 21651da177e4SLinus Torvalds } 21661da177e4SLinus Torvalds 2167b37ad28bSAl Viro static inline __be32 21684a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 21694a6e43e6SNeilBrown { 21704a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 21714a6e43e6SNeilBrown return nfserr_openmode; 21724a6e43e6SNeilBrown else 21734a6e43e6SNeilBrown return nfs_ok; 21744a6e43e6SNeilBrown } 21754a6e43e6SNeilBrown 217652f4fb43SNeilBrown static struct nfs4_delegation * 217752f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 217852f4fb43SNeilBrown { 217952f4fb43SNeilBrown struct nfs4_delegation *dp; 218052f4fb43SNeilBrown 2181ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 218252f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 218352f4fb43SNeilBrown return dp; 218452f4fb43SNeilBrown } 218552f4fb43SNeilBrown return NULL; 218652f4fb43SNeilBrown } 218752f4fb43SNeilBrown 2188b37ad28bSAl Viro static __be32 2189567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2190567d9829SNeilBrown struct nfs4_delegation **dp) 2191567d9829SNeilBrown { 2192567d9829SNeilBrown int flags; 2193b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2194567d9829SNeilBrown 2195567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2196567d9829SNeilBrown if (*dp == NULL) 2197c44c5eebSNeilBrown goto out; 2198567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 2199567d9829SNeilBrown RD_STATE : WR_STATE; 2200567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2201567d9829SNeilBrown if (status) 2202567d9829SNeilBrown *dp = NULL; 2203c44c5eebSNeilBrown out: 2204c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2205c44c5eebSNeilBrown return nfs_ok; 2206c44c5eebSNeilBrown if (status) 2207c44c5eebSNeilBrown return status; 2208c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2209c44c5eebSNeilBrown return nfs_ok; 2210567d9829SNeilBrown } 2211567d9829SNeilBrown 2212b37ad28bSAl Viro static __be32 22131da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 22141da177e4SLinus Torvalds { 22151da177e4SLinus Torvalds struct nfs4_stateid *local; 2216b37ad28bSAl Viro __be32 status = nfserr_share_denied; 22171da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 22181da177e4SLinus Torvalds 22198beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 22201da177e4SLinus Torvalds /* ignore lock owners */ 22211da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 22221da177e4SLinus Torvalds continue; 22231da177e4SLinus Torvalds /* remember if we have seen this open owner */ 22241da177e4SLinus Torvalds if (local->st_stateowner == sop) 22251da177e4SLinus Torvalds *stpp = local; 22261da177e4SLinus Torvalds /* check for conflicting share reservations */ 22271da177e4SLinus Torvalds if (!test_share(local, open)) 22281da177e4SLinus Torvalds goto out; 22291da177e4SLinus Torvalds } 22301da177e4SLinus Torvalds status = 0; 22311da177e4SLinus Torvalds out: 22321da177e4SLinus Torvalds return status; 22331da177e4SLinus Torvalds } 22341da177e4SLinus Torvalds 22355ac049acSNeilBrown static inline struct nfs4_stateid * 22365ac049acSNeilBrown nfs4_alloc_stateid(void) 22375ac049acSNeilBrown { 22385ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 22395ac049acSNeilBrown } 22405ac049acSNeilBrown 2241b37ad28bSAl Viro static __be32 22421da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2243567d9829SNeilBrown struct nfs4_delegation *dp, 22441da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 22451da177e4SLinus Torvalds { 22461da177e4SLinus Torvalds struct nfs4_stateid *stp; 22471da177e4SLinus Torvalds 22485ac049acSNeilBrown stp = nfs4_alloc_stateid(); 22491da177e4SLinus Torvalds if (stp == NULL) 22501da177e4SLinus Torvalds return nfserr_resource; 22511da177e4SLinus Torvalds 2252567d9829SNeilBrown if (dp) { 2253567d9829SNeilBrown get_file(dp->dl_vfs_file); 2254567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 2255567d9829SNeilBrown } else { 2256b37ad28bSAl Viro __be32 status; 2257567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 2258567d9829SNeilBrown &stp->st_vfs_file); 22591da177e4SLinus Torvalds if (status) { 22601da177e4SLinus Torvalds if (status == nfserr_dropit) 22611da177e4SLinus Torvalds status = nfserr_jukebox; 22625ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 22631da177e4SLinus Torvalds return status; 22641da177e4SLinus Torvalds } 2265567d9829SNeilBrown } 22661da177e4SLinus Torvalds *stpp = stp; 22671da177e4SLinus Torvalds return 0; 22681da177e4SLinus Torvalds } 22691da177e4SLinus Torvalds 2270b37ad28bSAl Viro static inline __be32 22711da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 22721da177e4SLinus Torvalds struct nfsd4_open *open) 22731da177e4SLinus Torvalds { 22741da177e4SLinus Torvalds struct iattr iattr = { 22751da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 22761da177e4SLinus Torvalds .ia_size = 0, 22771da177e4SLinus Torvalds }; 22781da177e4SLinus Torvalds if (!open->op_truncate) 22791da177e4SLinus Torvalds return 0; 22801da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 22819246585aSAl Viro return nfserr_inval; 22821da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 22831da177e4SLinus Torvalds } 22841da177e4SLinus Torvalds 2285b37ad28bSAl Viro static __be32 22861da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 22871da177e4SLinus Torvalds { 22881da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 22897eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 22906c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 2291b37ad28bSAl Viro __be32 status; 22921da177e4SLinus Torvalds 22931da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 22946c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 22956c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 22961da177e4SLinus Torvalds 22976c26d08fSJ. Bruce Fields if (new_writer) { 2298b37ad28bSAl Viro int err = get_write_access(inode); 2299b37ad28bSAl Viro if (err) 2300b37ad28bSAl Viro return nfserrno(err); 2301e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 2302e518f056SBenny Halevy if (err) 2303e518f056SBenny Halevy return nfserrno(err); 2304e518f056SBenny Halevy file_take_write(filp); 23056c26d08fSJ. Bruce Fields } 23061da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 23071da177e4SLinus Torvalds if (status) { 23086c26d08fSJ. Bruce Fields if (new_writer) 23091da177e4SLinus Torvalds put_write_access(inode); 23101da177e4SLinus Torvalds return status; 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds /* remember the open */ 23136c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 2314b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 2315b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 23161da177e4SLinus Torvalds 23171da177e4SLinus Torvalds return nfs_ok; 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds 23201da177e4SLinus Torvalds 23211da177e4SLinus Torvalds static void 232237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 23231da177e4SLinus Torvalds { 23241da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2325c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 23261da177e4SLinus Torvalds } 23271da177e4SLinus Torvalds 23281da177e4SLinus Torvalds /* 23291da177e4SLinus Torvalds * Attempt to hand out a delegation. 23301da177e4SLinus Torvalds */ 23311da177e4SLinus Torvalds static void 23321da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 23331da177e4SLinus Torvalds { 23341da177e4SLinus Torvalds struct nfs4_delegation *dp; 23351da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 23362bf23875SJ. Bruce Fields int cb_up = atomic_read(&sop->so_client->cl_cb_set); 23371da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 23381da177e4SLinus Torvalds int status, flag = 0; 23391da177e4SLinus Torvalds 23401da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23417b190fecSNeilBrown open->op_recall = 0; 23427b190fecSNeilBrown switch (open->op_claim_type) { 23437b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 23442bf23875SJ. Bruce Fields if (!cb_up) 23457b190fecSNeilBrown open->op_recall = 1; 23467b190fecSNeilBrown flag = open->op_delegate_type; 23477b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 23481da177e4SLinus Torvalds goto out; 23497b190fecSNeilBrown break; 23507b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 23517b190fecSNeilBrown /* Let's not give out any delegations till everyone's 23527b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2353af558e33SJ. Bruce Fields if (locks_in_grace()) 23547b190fecSNeilBrown goto out; 23552bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 23567b190fecSNeilBrown goto out; 23571da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 23581da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 23591da177e4SLinus Torvalds else 23601da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 23617b190fecSNeilBrown break; 23627b190fecSNeilBrown default: 23637b190fecSNeilBrown goto out; 23647b190fecSNeilBrown } 23651da177e4SLinus Torvalds 23661da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 23671da177e4SLinus Torvalds if (dp == NULL) { 23681da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23691da177e4SLinus Torvalds goto out; 23701da177e4SLinus Torvalds } 23711da177e4SLinus Torvalds locks_init_lock(&fl); 23721da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 23731da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 23749167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 23751da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 23761da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 23771da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 23781da177e4SLinus Torvalds fl.fl_pid = current->tgid; 23791da177e4SLinus Torvalds 2380a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 23811da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 23821da177e4SLinus Torvalds */ 23839167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 23841da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2385c907132dSNeilBrown unhash_delegation(dp); 23861da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 23871da177e4SLinus Torvalds goto out; 23881da177e4SLinus Torvalds } 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 23911da177e4SLinus Torvalds 23928c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 23938c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 23941da177e4SLinus Torvalds out: 23957b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 23967b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 23977b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 23982fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 23991da177e4SLinus Torvalds open->op_delegate_type = flag; 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds /* 24031da177e4SLinus Torvalds * called with nfs4_lock_state() held. 24041da177e4SLinus Torvalds */ 2405b37ad28bSAl Viro __be32 24061da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 24071da177e4SLinus Torvalds { 24086668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 24091da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 24101da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24111da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2412567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2413b37ad28bSAl Viro __be32 status; 24141da177e4SLinus Torvalds 24151da177e4SLinus Torvalds status = nfserr_inval; 2416d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2417ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 24181da177e4SLinus Torvalds goto out; 24191da177e4SLinus Torvalds /* 24201da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 24211da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 24221da177e4SLinus Torvalds * If not found, create the nfs4_file struct 24231da177e4SLinus Torvalds */ 24241da177e4SLinus Torvalds fp = find_file(ino); 24251da177e4SLinus Torvalds if (fp) { 24261da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 24271da177e4SLinus Torvalds goto out; 2428c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2429c44c5eebSNeilBrown if (status) 2430c44c5eebSNeilBrown goto out; 24311da177e4SLinus Torvalds } else { 2432c44c5eebSNeilBrown status = nfserr_bad_stateid; 2433c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2434c44c5eebSNeilBrown goto out; 24351da177e4SLinus Torvalds status = nfserr_resource; 24361da177e4SLinus Torvalds fp = alloc_init_file(ino); 24371da177e4SLinus Torvalds if (fp == NULL) 24381da177e4SLinus Torvalds goto out; 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds 24411da177e4SLinus Torvalds /* 24421da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 24431da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 24441da177e4SLinus Torvalds */ 24451da177e4SLinus Torvalds if (stp) { 24461da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 24471da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 24481da177e4SLinus Torvalds if (status) 24491da177e4SLinus Torvalds goto out; 2450444c2c07SNeilBrown update_stateid(&stp->st_stateid); 24511da177e4SLinus Torvalds } else { 24521da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 24531da177e4SLinus Torvalds int flags = 0; 24549ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 24558837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 24561da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 24578837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 2458567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 2459567d9829SNeilBrown if (status) 24601da177e4SLinus Torvalds goto out; 24611da177e4SLinus Torvalds init_stateid(stp, fp, open); 24621da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 24631da177e4SLinus Torvalds if (status) { 24642283963fSJ. Bruce Fields release_open_stateid(stp); 24651da177e4SLinus Torvalds goto out; 24661da177e4SLinus Torvalds } 24676668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 24686668958fSAndy Adamson update_stateid(&stp->st_stateid); 24691da177e4SLinus Torvalds } 24701da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 24711da177e4SLinus Torvalds 24728b8aae40SRicardo Labiaga if (nfsd4_has_session(&resp->cstate)) { 24736668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 24748b8aae40SRicardo Labiaga nfsd4_create_clid_dir(open->op_stateowner->so_client); 24758b8aae40SRicardo Labiaga } 24766668958fSAndy Adamson 24771da177e4SLinus Torvalds /* 24781da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 24791da177e4SLinus Torvalds * OPEN succeeds even if we fail. 24801da177e4SLinus Torvalds */ 24811da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 24821da177e4SLinus Torvalds 24831da177e4SLinus Torvalds status = nfs_ok; 24841da177e4SLinus Torvalds 24858c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 24868c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 24871da177e4SLinus Torvalds out: 248813cd2184SNeilBrown if (fp) 248913cd2184SNeilBrown put_nfs4_file(fp); 249037515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 249137515177SNeilBrown nfs4_set_claim_prev(open); 24921da177e4SLinus Torvalds /* 24931da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 24941da177e4SLinus Torvalds */ 24951da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 24966668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 24976668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 24981da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds return status; 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds 2503b37ad28bSAl Viro __be32 2504b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2505b591480bSJ.Bruce Fields clientid_t *clid) 25061da177e4SLinus Torvalds { 25071da177e4SLinus Torvalds struct nfs4_client *clp; 2508b37ad28bSAl Viro __be32 status; 25091da177e4SLinus Torvalds 25101da177e4SLinus Torvalds nfs4_lock_state(); 25111da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 25121da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 25131da177e4SLinus Torvalds status = nfserr_stale_clientid; 25141da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 25151da177e4SLinus Torvalds goto out; 25161da177e4SLinus Torvalds clp = find_confirmed_client(clid); 25171da177e4SLinus Torvalds status = nfserr_expired; 25181da177e4SLinus Torvalds if (clp == NULL) { 25191da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 25201da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 25211da177e4SLinus Torvalds goto out; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds renew_client(clp); 25241da177e4SLinus Torvalds status = nfserr_cb_path_down; 2525ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 25262bf23875SJ. Bruce Fields && !atomic_read(&clp->cl_cb_set)) 25271da177e4SLinus Torvalds goto out; 25281da177e4SLinus Torvalds status = nfs_ok; 25291da177e4SLinus Torvalds out: 25301da177e4SLinus Torvalds nfs4_unlock_state(); 25311da177e4SLinus Torvalds return status; 25321da177e4SLinus Torvalds } 25331da177e4SLinus Torvalds 2534af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2535af558e33SJ. Bruce Fields }; 2536af558e33SJ. Bruce Fields 2537a76b4319SNeilBrown static void 2538af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2539a76b4319SNeilBrown { 2540a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2541c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2542af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2543e46b498cSJ. Bruce Fields /* 2544e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2545e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2546e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2547e46b498cSJ. Bruce Fields */ 2548e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2549a76b4319SNeilBrown } 2550a76b4319SNeilBrown 2551fd39ca9aSNeilBrown static time_t 25521da177e4SLinus Torvalds nfs4_laundromat(void) 25531da177e4SLinus Torvalds { 25541da177e4SLinus Torvalds struct nfs4_client *clp; 25551da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25561da177e4SLinus Torvalds struct nfs4_delegation *dp; 25571da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2558cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2559cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 2560cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 25611da177e4SLinus Torvalds 25621da177e4SLinus Torvalds nfs4_lock_state(); 25631da177e4SLinus Torvalds 25641da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2565af558e33SJ. Bruce Fields if (locks_in_grace()) 2566af558e33SJ. Bruce Fields nfsd4_end_grace(); 25671da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 25681da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 25691da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 25701da177e4SLinus Torvalds t = clp->cl_time - cutoff; 25711da177e4SLinus Torvalds if (clientid_val > t) 25721da177e4SLinus Torvalds clientid_val = t; 25731da177e4SLinus Torvalds break; 25741da177e4SLinus Torvalds } 25751da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 25761da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2577c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 25781da177e4SLinus Torvalds expire_client(clp); 25791da177e4SLinus Torvalds } 25801da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 25811da177e4SLinus Torvalds spin_lock(&recall_lock); 25821da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 25831da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 25841da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 25851da177e4SLinus Torvalds u = dp->dl_time - cutoff; 25861da177e4SLinus Torvalds if (test_val > u) 25871da177e4SLinus Torvalds test_val = u; 25881da177e4SLinus Torvalds break; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 25911da177e4SLinus Torvalds dp, dp->dl_flock); 25921da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 25931da177e4SLinus Torvalds } 25941da177e4SLinus Torvalds spin_unlock(&recall_lock); 25951da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 25961da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 25971da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 25981da177e4SLinus Torvalds unhash_delegation(dp); 25991da177e4SLinus Torvalds } 2600cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 26011da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 26021da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 26031da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 26041da177e4SLinus Torvalds u = sop->so_time - cutoff; 26051da177e4SLinus Torvalds if (test_val > u) 26061da177e4SLinus Torvalds test_val = u; 26071da177e4SLinus Torvalds break; 26081da177e4SLinus Torvalds } 26091da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 26101da177e4SLinus Torvalds sop->so_id); 2611f044ff83SJ. Bruce Fields release_openowner(sop); 26121da177e4SLinus Torvalds } 26131da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 26141da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 26151da177e4SLinus Torvalds nfs4_unlock_state(); 26161da177e4SLinus Torvalds return clientid_val; 26171da177e4SLinus Torvalds } 26181da177e4SLinus Torvalds 2619a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2620a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2621a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2622a254b246SHarvey Harrison 2623a254b246SHarvey Harrison static void 2624c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 26251da177e4SLinus Torvalds { 26261da177e4SLinus Torvalds time_t t; 26271da177e4SLinus Torvalds 26281da177e4SLinus Torvalds t = nfs4_laundromat(); 26291da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 263058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 26311da177e4SLinus Torvalds } 26321da177e4SLinus Torvalds 2633fd39ca9aSNeilBrown static struct nfs4_stateowner * 2634f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2635f8816512SNeilBrown { 26361da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 26371da177e4SLinus Torvalds 26381da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 26391da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 26401da177e4SLinus Torvalds if (local->so_id == st_id) 26411da177e4SLinus Torvalds return local; 26421da177e4SLinus Torvalds } 26431da177e4SLinus Torvalds } 26441da177e4SLinus Torvalds return NULL; 26451da177e4SLinus Torvalds } 26461da177e4SLinus Torvalds 26471da177e4SLinus Torvalds static inline int 26481da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 26491da177e4SLinus Torvalds { 26507eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 26511da177e4SLinus Torvalds } 26521da177e4SLinus Torvalds 26531da177e4SLinus Torvalds static int 26541da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 26551da177e4SLinus Torvalds { 265678155ed7SBian Naimeng if (time_after((unsigned long)boot_time, 265778155ed7SBian Naimeng (unsigned long)stateid->si_boot)) { 26588c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 26598c10cbdbSBenny Halevy STATEID_VAL(stateid)); 26601da177e4SLinus Torvalds return 1; 26611da177e4SLinus Torvalds } 266278155ed7SBian Naimeng return 0; 266378155ed7SBian Naimeng } 266478155ed7SBian Naimeng 266578155ed7SBian Naimeng static int 266678155ed7SBian Naimeng EXPIRED_STATEID(stateid_t *stateid) 266778155ed7SBian Naimeng { 266878155ed7SBian Naimeng if (time_before((unsigned long)boot_time, 266978155ed7SBian Naimeng ((unsigned long)stateid->si_boot)) && 2670cf07d2eaSJ. Bruce Fields time_before((unsigned long)(stateid->si_boot + nfsd4_lease), get_seconds())) { 26718c10cbdbSBenny Halevy dprintk("NFSD: expired stateid " STATEID_FMT "!\n", 26728c10cbdbSBenny Halevy STATEID_VAL(stateid)); 267378155ed7SBian Naimeng return 1; 267478155ed7SBian Naimeng } 267578155ed7SBian Naimeng return 0; 267678155ed7SBian Naimeng } 267778155ed7SBian Naimeng 267878155ed7SBian Naimeng static __be32 267978155ed7SBian Naimeng stateid_error_map(stateid_t *stateid) 268078155ed7SBian Naimeng { 268178155ed7SBian Naimeng if (STALE_STATEID(stateid)) 268278155ed7SBian Naimeng return nfserr_stale_stateid; 268378155ed7SBian Naimeng if (EXPIRED_STATEID(stateid)) 268478155ed7SBian Naimeng return nfserr_expired; 268578155ed7SBian Naimeng 26868c10cbdbSBenny Halevy dprintk("NFSD: bad stateid " STATEID_FMT "!\n", 26878c10cbdbSBenny Halevy STATEID_VAL(stateid)); 268878155ed7SBian Naimeng return nfserr_bad_stateid; 268978155ed7SBian Naimeng } 26901da177e4SLinus Torvalds 26911da177e4SLinus Torvalds static inline int 26921da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 26931da177e4SLinus Torvalds { 26941da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 26951da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 26961da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 26971da177e4SLinus Torvalds } 26981da177e4SLinus Torvalds 26991da177e4SLinus Torvalds static inline int 27001da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 27011da177e4SLinus Torvalds { 27021da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 27031da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 27041da177e4SLinus Torvalds } 27051da177e4SLinus Torvalds 27061da177e4SLinus Torvalds static 2707b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 27081da177e4SLinus Torvalds { 2709b37ad28bSAl Viro __be32 status = nfserr_openmode; 27101da177e4SLinus Torvalds 27111da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 27121da177e4SLinus Torvalds goto out; 27131da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 27141da177e4SLinus Torvalds goto out; 27151da177e4SLinus Torvalds status = nfs_ok; 27161da177e4SLinus Torvalds out: 27171da177e4SLinus Torvalds return status; 27181da177e4SLinus Torvalds } 27191da177e4SLinus Torvalds 2720b37ad28bSAl Viro static inline __be32 27211da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 27221da177e4SLinus Torvalds { 2723203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 27241da177e4SLinus Torvalds return nfs_ok; 2725af558e33SJ. Bruce Fields else if (locks_in_grace()) { 27261da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 27271da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 27281da177e4SLinus Torvalds return nfserr_grace; 27291da177e4SLinus Torvalds } else if (flags & WR_STATE) 27301da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 27311da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 27321da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 27331da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 27341da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 27351da177e4SLinus Torvalds } 27361da177e4SLinus Torvalds 27371da177e4SLinus Torvalds /* 27381da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 27391da177e4SLinus Torvalds * that are not able to provide mandatory locking. 27401da177e4SLinus Torvalds */ 27411da177e4SLinus Torvalds static inline int 274218f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 27431da177e4SLinus Torvalds { 2744203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 27451da177e4SLinus Torvalds } 27461da177e4SLinus Torvalds 27476668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 27480836f587SJ. Bruce Fields { 27496668958fSAndy Adamson /* 27506668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 27516668958fSAndy Adamson * when it is zero. 27526668958fSAndy Adamson */ 27536668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 27546668958fSAndy Adamson goto out; 27556668958fSAndy Adamson 27560836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 27570836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 27580836f587SJ. Bruce Fields return nfserr_bad_stateid; 27590836f587SJ. Bruce Fields /* 27600836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 27610836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 27620836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 27630836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 27640836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 27650836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 27660836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 27670836f587SJ. Bruce Fields * will just have to retry the IO: 27680836f587SJ. Bruce Fields */ 27690836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 27700836f587SJ. Bruce Fields return nfserr_old_stateid; 27716668958fSAndy Adamson out: 27720836f587SJ. Bruce Fields return nfs_ok; 27730836f587SJ. Bruce Fields } 27740836f587SJ. Bruce Fields 27753e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 27763e633079SJ. Bruce Fields { 27773e633079SJ. Bruce Fields return stateid->si_fileid == 0; 27783e633079SJ. Bruce Fields } 27793e633079SJ. Bruce Fields 27801da177e4SLinus Torvalds /* 27811da177e4SLinus Torvalds * Checks for stateid operations 27821da177e4SLinus Torvalds */ 2783b37ad28bSAl Viro __be32 2784dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 2785dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 27861da177e4SLinus Torvalds { 27871da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 27881da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 2789dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 27901da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2791b37ad28bSAl Viro __be32 status; 27921da177e4SLinus Torvalds 27931da177e4SLinus Torvalds if (filpp) 27941da177e4SLinus Torvalds *filpp = NULL; 27951da177e4SLinus Torvalds 279618f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 27971da177e4SLinus Torvalds return nfserr_grace; 27981da177e4SLinus Torvalds 27996668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28006668958fSAndy Adamson flags |= HAS_SESSION; 28016668958fSAndy Adamson 28021da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 28031da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 28041da177e4SLinus Torvalds 28051da177e4SLinus Torvalds status = nfserr_stale_stateid; 28061da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28071da177e4SLinus Torvalds goto out; 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds status = nfserr_bad_stateid; 28103e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2811a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 281278155ed7SBian Naimeng if (!dp) { 281378155ed7SBian Naimeng status = stateid_error_map(stateid); 28141da177e4SLinus Torvalds goto out; 281578155ed7SBian Naimeng } 28166668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 28176668958fSAndy Adamson flags); 28180c2a498fSJ. Bruce Fields if (status) 28190c2a498fSJ. Bruce Fields goto out; 2820dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2821dc9bf700SJ. Bruce Fields if (status) 2822dc9bf700SJ. Bruce Fields goto out; 2823dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2824dc9bf700SJ. Bruce Fields if (filpp) 2825dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 28261da177e4SLinus Torvalds } else { /* open or lock stateid */ 2827a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 282878155ed7SBian Naimeng if (!stp) { 282978155ed7SBian Naimeng status = stateid_error_map(stateid); 28301da177e4SLinus Torvalds goto out; 283178155ed7SBian Naimeng } 28326150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 28331da177e4SLinus Torvalds goto out; 28341da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 28351da177e4SLinus Torvalds goto out; 28366668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 28376668958fSAndy Adamson flags); 28380836f587SJ. Bruce Fields if (status) 28391da177e4SLinus Torvalds goto out; 2840a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2841a4455be0SJ. Bruce Fields if (status) 28421da177e4SLinus Torvalds goto out; 28431da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 28441da177e4SLinus Torvalds if (filpp) 28451da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 28461da177e4SLinus Torvalds } 28471da177e4SLinus Torvalds status = nfs_ok; 28481da177e4SLinus Torvalds out: 28491da177e4SLinus Torvalds return status; 28501da177e4SLinus Torvalds } 28511da177e4SLinus Torvalds 28524c4cd222SNeilBrown static inline int 28534c4cd222SNeilBrown setlkflg (int type) 28544c4cd222SNeilBrown { 28554c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 28564c4cd222SNeilBrown RD_STATE : WR_STATE; 28574c4cd222SNeilBrown } 28581da177e4SLinus Torvalds 28591da177e4SLinus Torvalds /* 28601da177e4SLinus Torvalds * Checks for sequence id mutating operations. 28611da177e4SLinus Torvalds */ 2862b37ad28bSAl Viro static __be32 2863dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 2864dd453dfdSBenny Halevy stateid_t *stateid, int flags, 2865dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 2866dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 28671da177e4SLinus Torvalds { 28681da177e4SLinus Torvalds struct nfs4_stateid *stp; 28691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 2870dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 28710836f587SJ. Bruce Fields __be32 status; 28721da177e4SLinus Torvalds 28738c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 28748c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds *stpp = NULL; 28771da177e4SLinus Torvalds *sopp = NULL; 28781da177e4SLinus Torvalds 28791da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 28802fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 28813a4f98bbSNeilBrown return nfserr_bad_stateid; 28821da177e4SLinus Torvalds } 28831da177e4SLinus Torvalds 28841da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28853a4f98bbSNeilBrown return nfserr_stale_stateid; 28866668958fSAndy Adamson 28876668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28886668958fSAndy Adamson flags |= HAS_SESSION; 28896668958fSAndy Adamson 28901da177e4SLinus Torvalds /* 28911da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 28921da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 28931da177e4SLinus Torvalds * number is incorrect. 28941da177e4SLinus Torvalds */ 2895f8816512SNeilBrown stp = find_stateid(stateid, flags); 2896f8816512SNeilBrown if (stp == NULL) { 2897f8816512SNeilBrown /* 2898f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2899f8816512SNeilBrown * a replayed close: 2900f8816512SNeilBrown */ 2901f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2902f8816512SNeilBrown if (sop == NULL) 290378155ed7SBian Naimeng return stateid_error_map(stateid); 2904f8816512SNeilBrown *sopp = sop; 2905f8816512SNeilBrown goto check_replay; 2906f8816512SNeilBrown } 29071da177e4SLinus Torvalds 290839325bd0SJ. Bruce Fields *stpp = stp; 290939325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 291039325bd0SJ. Bruce Fields 29114c4cd222SNeilBrown if (lock) { 29124c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 29131da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 29144c4cd222SNeilBrown int lkflg = 0; 2915b37ad28bSAl Viro __be32 status; 29161da177e4SLinus Torvalds 29174c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 29184c4cd222SNeilBrown 29194c4cd222SNeilBrown if (lock->lk_is_new) { 29201da177e4SLinus Torvalds if (!sop->so_is_open_owner) 29213a4f98bbSNeilBrown return nfserr_bad_stateid; 292260adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 292360adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 29243a4f98bbSNeilBrown return nfserr_bad_stateid; 29254c4cd222SNeilBrown /* stp is the open stateid */ 29264c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 29274c4cd222SNeilBrown if (status) 29284c4cd222SNeilBrown return status; 29294c4cd222SNeilBrown } else { 29304c4cd222SNeilBrown /* stp is the lock stateid */ 29314c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 29324c4cd222SNeilBrown if (status) 29334c4cd222SNeilBrown return status; 29344c4cd222SNeilBrown } 29351da177e4SLinus Torvalds } 29361da177e4SLinus Torvalds 2937f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 29382fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 29393a4f98bbSNeilBrown return nfserr_bad_stateid; 29401da177e4SLinus Torvalds } 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds /* 29431da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 29441da177e4SLinus Torvalds * For the moment, we ignore the possibility of 29451da177e4SLinus Torvalds * generation number wraparound. 29461da177e4SLinus Torvalds */ 29476668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 29481da177e4SLinus Torvalds goto check_replay; 29491da177e4SLinus Torvalds 29503a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 29512fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 29523a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 29533a4f98bbSNeilBrown return nfserr_bad_stateid; 29541da177e4SLinus Torvalds } 29553a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 29562fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 29573a4f98bbSNeilBrown " confirmed yet!\n"); 29583a4f98bbSNeilBrown return nfserr_bad_stateid; 29591da177e4SLinus Torvalds } 29606668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 29610836f587SJ. Bruce Fields if (status) 29620836f587SJ. Bruce Fields return status; 296352fd004eSNeilBrown renew_client(sop->so_client); 29643a4f98bbSNeilBrown return nfs_ok; 29651da177e4SLinus Torvalds 29661da177e4SLinus Torvalds check_replay: 2967bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2968849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 29691da177e4SLinus Torvalds /* indicate replay to calling function */ 2970a90b061cSAl Viro return nfserr_replay_me; 29711da177e4SLinus Torvalds } 29722fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 29733a4f98bbSNeilBrown sop->so_seqid, seqid); 29743a4f98bbSNeilBrown *sopp = NULL; 29753a4f98bbSNeilBrown return nfserr_bad_seqid; 29761da177e4SLinus Torvalds } 29771da177e4SLinus Torvalds 2978b37ad28bSAl Viro __be32 2979ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2980a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 29811da177e4SLinus Torvalds { 2982b37ad28bSAl Viro __be32 status; 29831da177e4SLinus Torvalds struct nfs4_stateowner *sop; 29841da177e4SLinus Torvalds struct nfs4_stateid *stp; 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2987ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2988ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 29891da177e4SLinus Torvalds 2990ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2991a8cddc5dSJ. Bruce Fields if (status) 2992a8cddc5dSJ. Bruce Fields return status; 29931da177e4SLinus Torvalds 29941da177e4SLinus Torvalds nfs4_lock_state(); 29951da177e4SLinus Torvalds 2996dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 2997ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2998f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 29991da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 30001da177e4SLinus Torvalds goto out; 30011da177e4SLinus Torvalds 30021da177e4SLinus Torvalds sop = oc->oc_stateowner; 30031da177e4SLinus Torvalds sop->so_confirmed = 1; 30041da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30051da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 30068c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 30078c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3008c7b9a459SNeilBrown 3009c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 30101da177e4SLinus Torvalds out: 3011f2327d9aSNeil Brown if (oc->oc_stateowner) { 30121da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3013a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3014f2327d9aSNeil Brown } 30151da177e4SLinus Torvalds nfs4_unlock_state(); 30161da177e4SLinus Torvalds return status; 30171da177e4SLinus Torvalds } 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds 30201da177e4SLinus Torvalds /* 30211da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 30221da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 30231da177e4SLinus Torvalds */ 30241da177e4SLinus Torvalds static void 30251da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 30261da177e4SLinus Torvalds { 30271da177e4SLinus Torvalds int i; 30281da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 30291da177e4SLinus Torvalds if ((i & access) != i) 30301da177e4SLinus Torvalds __clear_bit(i, bmap); 30311da177e4SLinus Torvalds } 30321da177e4SLinus Torvalds } 30331da177e4SLinus Torvalds 30341da177e4SLinus Torvalds static void 30351da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 30361da177e4SLinus Torvalds { 30371da177e4SLinus Torvalds int i; 30381da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 30391da177e4SLinus Torvalds if ((i & deny) != i) 30401da177e4SLinus Torvalds __clear_bit(i, bmap); 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds } 30431da177e4SLinus Torvalds 3044b37ad28bSAl Viro __be32 3045ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3046ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3047a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 30481da177e4SLinus Torvalds { 3049b37ad28bSAl Viro __be32 status; 30501da177e4SLinus Torvalds struct nfs4_stateid *stp; 30511da177e4SLinus Torvalds unsigned int share_access; 30521da177e4SLinus Torvalds 30531da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3054ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3055ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 30561da177e4SLinus Torvalds 3057d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3058ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 30591da177e4SLinus Torvalds return nfserr_inval; 30601da177e4SLinus Torvalds 30611da177e4SLinus Torvalds nfs4_lock_state(); 3062dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3063ca364317SJ.Bruce Fields od->od_seqid, 30641da177e4SLinus Torvalds &od->od_stateid, 3065f3362737SJ. Bruce Fields OPEN_STATE, 30661da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 30671da177e4SLinus Torvalds goto out; 30681da177e4SLinus Torvalds 30691da177e4SLinus Torvalds status = nfserr_inval; 30701da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 30711da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 30721da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 30731da177e4SLinus Torvalds goto out; 30741da177e4SLinus Torvalds } 30751da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 30761da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 30771da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 30781da177e4SLinus Torvalds goto out; 30791da177e4SLinus Torvalds } 30801da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 30811da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 30821da177e4SLinus Torvalds share_access & ~od->od_share_access); 30831da177e4SLinus Torvalds 30841da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 30851da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 30861da177e4SLinus Torvalds 30871da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30881da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 30891da177e4SLinus Torvalds status = nfs_ok; 30901da177e4SLinus Torvalds out: 3091f2327d9aSNeil Brown if (od->od_stateowner) { 30921da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3093a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3094f2327d9aSNeil Brown } 30951da177e4SLinus Torvalds nfs4_unlock_state(); 30961da177e4SLinus Torvalds return status; 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds /* 31001da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 31011da177e4SLinus Torvalds */ 3102b37ad28bSAl Viro __be32 3103ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3104a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 31051da177e4SLinus Torvalds { 3106b37ad28bSAl Viro __be32 status; 31071da177e4SLinus Torvalds struct nfs4_stateid *stp; 31081da177e4SLinus Torvalds 31091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3110ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3111ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 31121da177e4SLinus Torvalds 31131da177e4SLinus Torvalds nfs4_lock_state(); 31141da177e4SLinus Torvalds /* check close_lru for replay */ 3115dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3116ca364317SJ.Bruce Fields close->cl_seqid, 31171da177e4SLinus Torvalds &close->cl_stateid, 3118f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 31191da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 31201da177e4SLinus Torvalds goto out; 31211da177e4SLinus Torvalds status = nfs_ok; 31221da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 31231da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 31241da177e4SLinus Torvalds 312504ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 31262283963fSJ. Bruce Fields release_open_stateid(stp); 312704ef5954SJ. Bruce Fields 312804ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 312904ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 313004ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 313104ef5954SJ. Bruce Fields */ 313204ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 313304ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 31341da177e4SLinus Torvalds out: 3135f2327d9aSNeil Brown if (close->cl_stateowner) { 31361da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3137a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3138f2327d9aSNeil Brown } 31391da177e4SLinus Torvalds nfs4_unlock_state(); 31401da177e4SLinus Torvalds return status; 31411da177e4SLinus Torvalds } 31421da177e4SLinus Torvalds 3143b37ad28bSAl Viro __be32 3144ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3145ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 31461da177e4SLinus Torvalds { 3147203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3148203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3149203a8c8eSJ. Bruce Fields struct inode *inode; 3150b37ad28bSAl Viro __be32 status; 31516668958fSAndy Adamson int flags = 0; 31521da177e4SLinus Torvalds 3153ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3154203a8c8eSJ. Bruce Fields return status; 3155203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 31561da177e4SLinus Torvalds 31576668958fSAndy Adamson if (nfsd4_has_session(cstate)) 31586668958fSAndy Adamson flags |= HAS_SESSION; 31591da177e4SLinus Torvalds nfs4_lock_state(); 3160203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3161203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3162203a8c8eSJ. Bruce Fields goto out; 3163203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3164203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3165203a8c8eSJ. Bruce Fields goto out; 31667e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3167203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3168203a8c8eSJ. Bruce Fields goto out; 3169203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 317078155ed7SBian Naimeng if (!dp) { 317178155ed7SBian Naimeng status = stateid_error_map(stateid); 3172203a8c8eSJ. Bruce Fields goto out; 317378155ed7SBian Naimeng } 31746668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3175203a8c8eSJ. Bruce Fields if (status) 3176203a8c8eSJ. Bruce Fields goto out; 3177203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3178203a8c8eSJ. Bruce Fields 3179203a8c8eSJ. Bruce Fields unhash_delegation(dp); 31801da177e4SLinus Torvalds out: 3181203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3182203a8c8eSJ. Bruce Fields 31831da177e4SLinus Torvalds return status; 31841da177e4SLinus Torvalds } 31851da177e4SLinus Torvalds 31861da177e4SLinus Torvalds 31871da177e4SLinus Torvalds /* 31881da177e4SLinus Torvalds * Lock owner state (byte-range locks) 31891da177e4SLinus Torvalds */ 31901da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 31911da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 31921da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 31931da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 31941da177e4SLinus Torvalds 319587df4de8SBenny Halevy static inline u64 319687df4de8SBenny Halevy end_offset(u64 start, u64 len) 319787df4de8SBenny Halevy { 319887df4de8SBenny Halevy u64 end; 319987df4de8SBenny Halevy 320087df4de8SBenny Halevy end = start + len; 320187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 320287df4de8SBenny Halevy } 320387df4de8SBenny Halevy 320487df4de8SBenny Halevy /* last octet in a range */ 320587df4de8SBenny Halevy static inline u64 320687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 320787df4de8SBenny Halevy { 320887df4de8SBenny Halevy u64 end; 320987df4de8SBenny Halevy 321087df4de8SBenny Halevy BUG_ON(!len); 321187df4de8SBenny Halevy end = start + len; 321287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 321387df4de8SBenny Halevy } 321487df4de8SBenny Halevy 32151da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 32161da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 32171da177e4SLinus Torvalds 32181da177e4SLinus Torvalds static inline unsigned int 32191da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 32201da177e4SLinus Torvalds struct xdr_netobj *ownername) 32211da177e4SLinus Torvalds { 32221da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 32231da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 32241da177e4SLinus Torvalds & LOCK_HASH_MASK; 32251da177e4SLinus Torvalds } 32261da177e4SLinus Torvalds 32271da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 32281da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 32291da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 32301da177e4SLinus Torvalds 3231fd39ca9aSNeilBrown static struct nfs4_stateid * 32321da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 32331da177e4SLinus Torvalds { 32349346eff0SKrishna Kumar struct nfs4_stateid *local; 32351da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 32361da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 32371da177e4SLinus Torvalds unsigned int hashval; 32381da177e4SLinus Torvalds 32391da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 32409346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 32411da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 32421da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 32431da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 32441da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 32451da177e4SLinus Torvalds return local; 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds } 32489346eff0SKrishna Kumar 32499346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 32501da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 32511da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 32521da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 32531da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 32541da177e4SLinus Torvalds return local; 32551da177e4SLinus Torvalds } 3256849823c5SNeil Brown } 32571da177e4SLinus Torvalds return NULL; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 32601da177e4SLinus Torvalds static struct nfs4_delegation * 32611da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 32621da177e4SLinus Torvalds { 326313cd2184SNeilBrown struct nfs4_file *fp; 326413cd2184SNeilBrown struct nfs4_delegation *dl; 32651da177e4SLinus Torvalds 32668c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 32678c10cbdbSBenny Halevy STATEID_VAL(stid)); 32681da177e4SLinus Torvalds 32691da177e4SLinus Torvalds fp = find_file(ino); 327013cd2184SNeilBrown if (!fp) 32711da177e4SLinus Torvalds return NULL; 327213cd2184SNeilBrown dl = find_delegation_file(fp, stid); 327313cd2184SNeilBrown put_nfs4_file(fp); 327413cd2184SNeilBrown return dl; 32751da177e4SLinus Torvalds } 32761da177e4SLinus Torvalds 32771da177e4SLinus Torvalds /* 32781da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 32791da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 32801da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 32811da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 32821da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 32831da177e4SLinus Torvalds * the VFS, but this is a very deep change! 32841da177e4SLinus Torvalds */ 32851da177e4SLinus Torvalds static inline void 32861da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 32871da177e4SLinus Torvalds { 32881da177e4SLinus Torvalds if (lock->fl_start < 0) 32891da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 32901da177e4SLinus Torvalds if (lock->fl_end < 0) 32911da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 32921da177e4SLinus Torvalds } 32931da177e4SLinus Torvalds 3294d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3295d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 32967b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3297d5b9026aSNeilBrown }; 32981da177e4SLinus Torvalds 32991da177e4SLinus Torvalds static inline void 33001da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 33011da177e4SLinus Torvalds { 3302d5b9026aSNeilBrown struct nfs4_stateowner *sop; 3303d5b9026aSNeilBrown unsigned int hval; 33041da177e4SLinus Torvalds 3305d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3306d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 3307d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 33081da177e4SLinus Torvalds kref_get(&sop->so_ref); 33091da177e4SLinus Torvalds deny->ld_sop = sop; 33101da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3311d5b9026aSNeilBrown } else { 3312d5b9026aSNeilBrown deny->ld_sop = NULL; 3313d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3314d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 33151da177e4SLinus Torvalds } 33161da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 331787df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 331887df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 33191da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 33201da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 33211da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 33221da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 33231da177e4SLinus Torvalds } 33241da177e4SLinus Torvalds 33251da177e4SLinus Torvalds static struct nfs4_stateowner * 33261da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 33271da177e4SLinus Torvalds struct xdr_netobj *owner) 33281da177e4SLinus Torvalds { 33291da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 33301da177e4SLinus Torvalds struct nfs4_stateowner *op; 33311da177e4SLinus Torvalds 33321da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3333599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 33341da177e4SLinus Torvalds return op; 33351da177e4SLinus Torvalds } 33361da177e4SLinus Torvalds return NULL; 33371da177e4SLinus Torvalds } 33381da177e4SLinus Torvalds 33391da177e4SLinus Torvalds /* 33401da177e4SLinus Torvalds * Alloc a lock owner structure. 33411da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 33421da177e4SLinus Torvalds * occured. 33431da177e4SLinus Torvalds * 33441da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 33451da177e4SLinus Torvalds */ 33461da177e4SLinus Torvalds 33471da177e4SLinus Torvalds static struct nfs4_stateowner * 33481da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 33491da177e4SLinus Torvalds struct nfs4_stateowner *sop; 33501da177e4SLinus Torvalds struct nfs4_replay *rp; 33511da177e4SLinus Torvalds unsigned int idhashval; 33521da177e4SLinus Torvalds 33531da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 33541da177e4SLinus Torvalds return NULL; 33551da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 33561da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 33571da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 33581da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3359ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3360ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 33611da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 33621da177e4SLinus Torvalds sop->so_time = 0; 33631da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 33641da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3365ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 33661da177e4SLinus Torvalds sop->so_is_open_owner = 0; 33671da177e4SLinus Torvalds sop->so_id = current_ownerid++; 33681da177e4SLinus Torvalds sop->so_client = clp; 3369b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3370b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3371b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 33721da177e4SLinus Torvalds sop->so_confirmed = 1; 33731da177e4SLinus Torvalds rp = &sop->so_replay; 3374de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 33751da177e4SLinus Torvalds rp->rp_buflen = 0; 33761da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 33771da177e4SLinus Torvalds return sop; 33781da177e4SLinus Torvalds } 33791da177e4SLinus Torvalds 3380fd39ca9aSNeilBrown static struct nfs4_stateid * 33811da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 33821da177e4SLinus Torvalds { 33831da177e4SLinus Torvalds struct nfs4_stateid *stp; 33841da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 33851da177e4SLinus Torvalds 33865ac049acSNeilBrown stp = nfs4_alloc_stateid(); 33875ac049acSNeilBrown if (stp == NULL) 33881da177e4SLinus Torvalds goto out; 33891da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 33901da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3391ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3392ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 33931da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 33948beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3395ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 33961da177e4SLinus Torvalds stp->st_stateowner = sop; 339713cd2184SNeilBrown get_nfs4_file(fp); 33981da177e4SLinus Torvalds stp->st_file = fp; 339978155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 34001da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 34011da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 34021da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 34031da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 34041da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 34051da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 34064c4cd222SNeilBrown stp->st_openstp = open_stp; 34071da177e4SLinus Torvalds 34081da177e4SLinus Torvalds out: 34091da177e4SLinus Torvalds return stp; 34101da177e4SLinus Torvalds } 34111da177e4SLinus Torvalds 3412fd39ca9aSNeilBrown static int 34131da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 34141da177e4SLinus Torvalds { 341587df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 34161da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 34171da177e4SLinus Torvalds } 34181da177e4SLinus Torvalds 34191da177e4SLinus Torvalds /* 34201da177e4SLinus Torvalds * LOCK operation 34211da177e4SLinus Torvalds */ 3422b37ad28bSAl Viro __be32 3423ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3424a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 34251da177e4SLinus Torvalds { 34263e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3427b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 34281da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 34291da177e4SLinus Torvalds struct file *filp; 34301da177e4SLinus Torvalds struct file_lock file_lock; 34318dc7c311SAndy Adamson struct file_lock conflock; 3432b37ad28bSAl Viro __be32 status = 0; 34331da177e4SLinus Torvalds unsigned int strhashval; 3434150b3934SMarc Eshel unsigned int cmd; 3435b8dd7b9aSAl Viro int err; 34361da177e4SLinus Torvalds 34371da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 34381da177e4SLinus Torvalds (long long) lock->lk_offset, 34391da177e4SLinus Torvalds (long long) lock->lk_length); 34401da177e4SLinus Torvalds 34411da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 34421da177e4SLinus Torvalds return nfserr_inval; 34431da177e4SLinus Torvalds 3444ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 34458837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3446a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3447a6f6ef2fSAndy Adamson return status; 3448a6f6ef2fSAndy Adamson } 3449a6f6ef2fSAndy Adamson 34501da177e4SLinus Torvalds nfs4_lock_state(); 34511da177e4SLinus Torvalds 34521da177e4SLinus Torvalds if (lock->lk_is_new) { 34531da177e4SLinus Torvalds /* 34541da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3455893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3456893f8770SNeilBrown * lock stateid. 34571da177e4SLinus Torvalds */ 34581da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 34591da177e4SLinus Torvalds struct nfs4_file *fp; 34601da177e4SLinus Torvalds 34611da177e4SLinus Torvalds status = nfserr_stale_clientid; 346260adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 346360adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 34641da177e4SLinus Torvalds goto out; 34651da177e4SLinus Torvalds 34661da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3467dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 34681da177e4SLinus Torvalds lock->lk_new_open_seqid, 34691da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3470f3362737SJ. Bruce Fields OPEN_STATE, 34713a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3472b59e3c0eSNeil Brown lock); 347337515177SNeilBrown if (status) 34741da177e4SLinus Torvalds goto out; 34753a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 34761da177e4SLinus Torvalds /* create lockowner and lock stateid */ 34771da177e4SLinus Torvalds fp = open_stp->st_file; 34781da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 34791da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 34801da177e4SLinus Torvalds &lock->v.new.owner); 34813e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 34823e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 34833e9e3dbeSNeilBrown * create new stateids)? */ 34841da177e4SLinus Torvalds status = nfserr_resource; 3485b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3486b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3487b59e3c0eSNeil Brown if (lock_sop == NULL) 34881da177e4SLinus Torvalds goto out; 3489b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 34908a280510SJ. Bruce Fields if (lock_stp == NULL) 34911da177e4SLinus Torvalds goto out; 34921da177e4SLinus Torvalds } else { 34931da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3494dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 34951da177e4SLinus Torvalds lock->lk_old_lock_seqid, 34961da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3497f3362737SJ. Bruce Fields LOCK_STATE, 34983a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 34991da177e4SLinus Torvalds if (status) 35001da177e4SLinus Torvalds goto out; 35013a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 35021da177e4SLinus Torvalds } 35033a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 35041da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 35051da177e4SLinus Torvalds 35060dd395dcSNeilBrown status = nfserr_grace; 3507af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 35080dd395dcSNeilBrown goto out; 35090dd395dcSNeilBrown status = nfserr_no_grace; 3510af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 35110dd395dcSNeilBrown goto out; 35120dd395dcSNeilBrown 35131da177e4SLinus Torvalds locks_init_lock(&file_lock); 35141da177e4SLinus Torvalds switch (lock->lk_type) { 35151da177e4SLinus Torvalds case NFS4_READ_LT: 35161da177e4SLinus Torvalds case NFS4_READW_LT: 35171da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3518150b3934SMarc Eshel cmd = F_SETLK; 35191da177e4SLinus Torvalds break; 35201da177e4SLinus Torvalds case NFS4_WRITE_LT: 35211da177e4SLinus Torvalds case NFS4_WRITEW_LT: 35221da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3523150b3934SMarc Eshel cmd = F_SETLK; 35241da177e4SLinus Torvalds break; 35251da177e4SLinus Torvalds default: 35261da177e4SLinus Torvalds status = nfserr_inval; 35271da177e4SLinus Torvalds goto out; 35281da177e4SLinus Torvalds } 3529b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 35301da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 35311da177e4SLinus Torvalds file_lock.fl_file = filp; 35321da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3533d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 35341da177e4SLinus Torvalds 35351da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 353687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 35371da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 35381da177e4SLinus Torvalds 35391da177e4SLinus Torvalds /* 35401da177e4SLinus Torvalds * Try to lock the file in the VFS. 35411da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 35421da177e4SLinus Torvalds */ 35431da177e4SLinus Torvalds 3544fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3545b8dd7b9aSAl Viro switch (-err) { 35461da177e4SLinus Torvalds case 0: /* success! */ 35471da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 35481da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 35491da177e4SLinus Torvalds sizeof(stateid_t)); 3550b8dd7b9aSAl Viro status = 0; 3551eb76b3fdSAndy Adamson break; 3552eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3553eb76b3fdSAndy Adamson status = nfserr_denied; 3554eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3555eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3556eb76b3fdSAndy Adamson break; 35571da177e4SLinus Torvalds case (EDEADLK): 35581da177e4SLinus Torvalds status = nfserr_deadlock; 3559eb76b3fdSAndy Adamson break; 35601da177e4SLinus Torvalds default: 3561fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3562eb76b3fdSAndy Adamson status = nfserr_resource; 3563eb76b3fdSAndy Adamson break; 35641da177e4SLinus Torvalds } 35651da177e4SLinus Torvalds out: 35668a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3567f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 35683a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 35693a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3570a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3571f2327d9aSNeil Brown } 35721da177e4SLinus Torvalds nfs4_unlock_state(); 35731da177e4SLinus Torvalds return status; 35741da177e4SLinus Torvalds } 35751da177e4SLinus Torvalds 35761da177e4SLinus Torvalds /* 357755ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 357855ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 357955ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 358055ef1274SJ. Bruce Fields * inode operation.) 358155ef1274SJ. Bruce Fields */ 358255ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 358355ef1274SJ. Bruce Fields { 358455ef1274SJ. Bruce Fields struct file *file; 358555ef1274SJ. Bruce Fields int err; 358655ef1274SJ. Bruce Fields 358755ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 358855ef1274SJ. Bruce Fields if (err) 358955ef1274SJ. Bruce Fields return err; 359055ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 359155ef1274SJ. Bruce Fields nfsd_close(file); 359255ef1274SJ. Bruce Fields return err; 359355ef1274SJ. Bruce Fields } 359455ef1274SJ. Bruce Fields 359555ef1274SJ. Bruce Fields /* 35961da177e4SLinus Torvalds * LOCKT operation 35971da177e4SLinus Torvalds */ 3598b37ad28bSAl Viro __be32 3599ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3600ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 36011da177e4SLinus Torvalds { 36021da177e4SLinus Torvalds struct inode *inode; 36031da177e4SLinus Torvalds struct file_lock file_lock; 3604fd85b817SMarc Eshel int error; 3605b37ad28bSAl Viro __be32 status; 36061da177e4SLinus Torvalds 3607af558e33SJ. Bruce Fields if (locks_in_grace()) 36081da177e4SLinus Torvalds return nfserr_grace; 36091da177e4SLinus Torvalds 36101da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 36111da177e4SLinus Torvalds return nfserr_inval; 36121da177e4SLinus Torvalds 36131da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 36141da177e4SLinus Torvalds nfs4_lock_state(); 36151da177e4SLinus Torvalds 36161da177e4SLinus Torvalds status = nfserr_stale_clientid; 361760adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 36181da177e4SLinus Torvalds goto out; 36191da177e4SLinus Torvalds 3620ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3621849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 36221da177e4SLinus Torvalds if (status == nfserr_symlink) 36231da177e4SLinus Torvalds status = nfserr_inval; 36241da177e4SLinus Torvalds goto out; 36251da177e4SLinus Torvalds } 36261da177e4SLinus Torvalds 3627ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 36281da177e4SLinus Torvalds locks_init_lock(&file_lock); 36291da177e4SLinus Torvalds switch (lockt->lt_type) { 36301da177e4SLinus Torvalds case NFS4_READ_LT: 36311da177e4SLinus Torvalds case NFS4_READW_LT: 36321da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 36331da177e4SLinus Torvalds break; 36341da177e4SLinus Torvalds case NFS4_WRITE_LT: 36351da177e4SLinus Torvalds case NFS4_WRITEW_LT: 36361da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 36371da177e4SLinus Torvalds break; 36381da177e4SLinus Torvalds default: 36392fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 36401da177e4SLinus Torvalds status = nfserr_inval; 36411da177e4SLinus Torvalds goto out; 36421da177e4SLinus Torvalds } 36431da177e4SLinus Torvalds 36441da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 36451da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 36461da177e4SLinus Torvalds if (lockt->lt_stateowner) 36471da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 36481da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 36491da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 36501da177e4SLinus Torvalds 36511da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 365287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 36551da177e4SLinus Torvalds 36561da177e4SLinus Torvalds status = nfs_ok; 365755ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3658fd85b817SMarc Eshel if (error) { 3659fd85b817SMarc Eshel status = nfserrno(error); 3660fd85b817SMarc Eshel goto out; 3661fd85b817SMarc Eshel } 36629d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 36631da177e4SLinus Torvalds status = nfserr_denied; 36649d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 36651da177e4SLinus Torvalds } 36661da177e4SLinus Torvalds out: 36671da177e4SLinus Torvalds nfs4_unlock_state(); 36681da177e4SLinus Torvalds return status; 36691da177e4SLinus Torvalds } 36701da177e4SLinus Torvalds 3671b37ad28bSAl Viro __be32 3672ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3673a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 36741da177e4SLinus Torvalds { 36751da177e4SLinus Torvalds struct nfs4_stateid *stp; 36761da177e4SLinus Torvalds struct file *filp = NULL; 36771da177e4SLinus Torvalds struct file_lock file_lock; 3678b37ad28bSAl Viro __be32 status; 3679b8dd7b9aSAl Viro int err; 36801da177e4SLinus Torvalds 36811da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 36821da177e4SLinus Torvalds (long long) locku->lu_offset, 36831da177e4SLinus Torvalds (long long) locku->lu_length); 36841da177e4SLinus Torvalds 36851da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 36861da177e4SLinus Torvalds return nfserr_inval; 36871da177e4SLinus Torvalds 36881da177e4SLinus Torvalds nfs4_lock_state(); 36891da177e4SLinus Torvalds 3690dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 36911da177e4SLinus Torvalds locku->lu_seqid, 36921da177e4SLinus Torvalds &locku->lu_stateid, 3693f3362737SJ. Bruce Fields LOCK_STATE, 36941da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 36951da177e4SLinus Torvalds goto out; 36961da177e4SLinus Torvalds 36971da177e4SLinus Torvalds filp = stp->st_vfs_file; 36981da177e4SLinus Torvalds BUG_ON(!filp); 36991da177e4SLinus Torvalds locks_init_lock(&file_lock); 37001da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 37011da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 37021da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37031da177e4SLinus Torvalds file_lock.fl_file = filp; 37041da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3705d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 37061da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 37071da177e4SLinus Torvalds 370887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 37091da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 37101da177e4SLinus Torvalds 37111da177e4SLinus Torvalds /* 37121da177e4SLinus Torvalds * Try to unlock the file in the VFS. 37131da177e4SLinus Torvalds */ 3714fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3715b8dd7b9aSAl Viro if (err) { 3716fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 37171da177e4SLinus Torvalds goto out_nfserr; 37181da177e4SLinus Torvalds } 37191da177e4SLinus Torvalds /* 37201da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 37211da177e4SLinus Torvalds */ 37221da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 37231da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 37241da177e4SLinus Torvalds 37251da177e4SLinus Torvalds out: 3726f2327d9aSNeil Brown if (locku->lu_stateowner) { 37271da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3728a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3729f2327d9aSNeil Brown } 37301da177e4SLinus Torvalds nfs4_unlock_state(); 37311da177e4SLinus Torvalds return status; 37321da177e4SLinus Torvalds 37331da177e4SLinus Torvalds out_nfserr: 3734b8dd7b9aSAl Viro status = nfserrno(err); 37351da177e4SLinus Torvalds goto out; 37361da177e4SLinus Torvalds } 37371da177e4SLinus Torvalds 37381da177e4SLinus Torvalds /* 37391da177e4SLinus Torvalds * returns 37401da177e4SLinus Torvalds * 1: locks held by lockowner 37411da177e4SLinus Torvalds * 0: no locks held by lockowner 37421da177e4SLinus Torvalds */ 37431da177e4SLinus Torvalds static int 37441da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 37451da177e4SLinus Torvalds { 37461da177e4SLinus Torvalds struct file_lock **flpp; 37477eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 37481da177e4SLinus Torvalds int status = 0; 37491da177e4SLinus Torvalds 37501da177e4SLinus Torvalds lock_kernel(); 37511da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3752796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 37531da177e4SLinus Torvalds status = 1; 37541da177e4SLinus Torvalds goto out; 37551da177e4SLinus Torvalds } 3756796dadfdSJ. Bruce Fields } 37571da177e4SLinus Torvalds out: 37581da177e4SLinus Torvalds unlock_kernel(); 37591da177e4SLinus Torvalds return status; 37601da177e4SLinus Torvalds } 37611da177e4SLinus Torvalds 3762b37ad28bSAl Viro __be32 3763b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3764b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3765b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 37661da177e4SLinus Torvalds { 37671da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 37683e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 37693e9e3dbeSNeilBrown struct nfs4_stateid *stp; 37701da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 37713e9e3dbeSNeilBrown struct list_head matches; 37723e9e3dbeSNeilBrown int i; 3773b37ad28bSAl Viro __be32 status; 37741da177e4SLinus Torvalds 37751da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 37761da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 37771da177e4SLinus Torvalds 37781da177e4SLinus Torvalds /* XXX check for lease expiration */ 37791da177e4SLinus Torvalds 37801da177e4SLinus Torvalds status = nfserr_stale_clientid; 3781849823c5SNeil Brown if (STALE_CLIENTID(clid)) 37821da177e4SLinus Torvalds return status; 37831da177e4SLinus Torvalds 37841da177e4SLinus Torvalds nfs4_lock_state(); 37851da177e4SLinus Torvalds 37861da177e4SLinus Torvalds status = nfserr_locks_held; 37873e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 37883e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 37893e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 37903e9e3dbeSNeilBrown * data structures. */ 37913e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 37923e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 37933e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3794599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 37953e9e3dbeSNeilBrown continue; 37963e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3797ea1da636SNeilBrown st_perstateowner) { 37983e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 37991da177e4SLinus Torvalds goto out; 38003e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 38013e9e3dbeSNeilBrown * so it's OK to fool with here. */ 38023e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 38031da177e4SLinus Torvalds } 38043e9e3dbeSNeilBrown } 38053e9e3dbeSNeilBrown } 38063e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 38073e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 38083e9e3dbeSNeilBrown * have been checked. */ 38091da177e4SLinus Torvalds status = nfs_ok; 38100fa822e4SNeilBrown while (!list_empty(&matches)) { 38110fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 38120fa822e4SNeilBrown so_perclient); 38130fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 38140fa822e4SNeilBrown * for openowners. */ 38150fa822e4SNeilBrown list_del(&sop->so_perclient); 3816f044ff83SJ. Bruce Fields release_lockowner(sop); 38171da177e4SLinus Torvalds } 38181da177e4SLinus Torvalds out: 38191da177e4SLinus Torvalds nfs4_unlock_state(); 38201da177e4SLinus Torvalds return status; 38211da177e4SLinus Torvalds } 38221da177e4SLinus Torvalds 38231da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3824a55370a3SNeilBrown alloc_reclaim(void) 38251da177e4SLinus Torvalds { 3826a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 38271da177e4SLinus Torvalds } 38281da177e4SLinus Torvalds 3829c7b9a459SNeilBrown int 3830a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 3831c7b9a459SNeilBrown { 3832c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3833c7b9a459SNeilBrown struct nfs4_client *clp; 3834c7b9a459SNeilBrown 3835a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 3836c7b9a459SNeilBrown return clp ? 1 : 0; 3837c7b9a459SNeilBrown } 3838c7b9a459SNeilBrown 38391da177e4SLinus Torvalds /* 38401da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 38411da177e4SLinus Torvalds */ 3842190e4fbfSNeilBrown int 3843190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 38441da177e4SLinus Torvalds { 38451da177e4SLinus Torvalds unsigned int strhashval; 38461da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38471da177e4SLinus Torvalds 3848a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3849a55370a3SNeilBrown crp = alloc_reclaim(); 38501da177e4SLinus Torvalds if (!crp) 38511da177e4SLinus Torvalds return 0; 3852a55370a3SNeilBrown strhashval = clientstr_hashval(name); 38531da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 38541da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3855a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 38561da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 38571da177e4SLinus Torvalds return 1; 38581da177e4SLinus Torvalds } 38591da177e4SLinus Torvalds 38601da177e4SLinus Torvalds static void 38611da177e4SLinus Torvalds nfs4_release_reclaim(void) 38621da177e4SLinus Torvalds { 38631da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38641da177e4SLinus Torvalds int i; 38651da177e4SLinus Torvalds 38661da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 38671da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 38681da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 38691da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 38701da177e4SLinus Torvalds list_del(&crp->cr_strhash); 38711da177e4SLinus Torvalds kfree(crp); 38721da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 38731da177e4SLinus Torvalds } 38741da177e4SLinus Torvalds } 38751da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 38761da177e4SLinus Torvalds } 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds /* 38791da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3880fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 38811da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 38821da177e4SLinus Torvalds { 38831da177e4SLinus Torvalds unsigned int strhashval; 38841da177e4SLinus Torvalds struct nfs4_client *clp; 38851da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 38861da177e4SLinus Torvalds 38871da177e4SLinus Torvalds 38881da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 38891da177e4SLinus Torvalds clp = find_confirmed_client(clid); 38901da177e4SLinus Torvalds if (clp == NULL) 38911da177e4SLinus Torvalds return NULL; 38921da177e4SLinus Torvalds 3893a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3894a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3895a55370a3SNeilBrown clp->cl_recdir); 38961da177e4SLinus Torvalds 38971da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3898a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 38991da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3900a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 39011da177e4SLinus Torvalds return crp; 39021da177e4SLinus Torvalds } 39031da177e4SLinus Torvalds } 39041da177e4SLinus Torvalds return NULL; 39051da177e4SLinus Torvalds } 39061da177e4SLinus Torvalds 39071da177e4SLinus Torvalds /* 39081da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 39091da177e4SLinus Torvalds */ 3910b37ad28bSAl Viro __be32 39111da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 39121da177e4SLinus Torvalds { 3913dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 39141da177e4SLinus Torvalds } 39151da177e4SLinus Torvalds 3916ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 39171da177e4SLinus Torvalds 3918e8ff2a84SJ. Bruce Fields int 3919ac4d8ff2SNeilBrown nfs4_state_init(void) 39201da177e4SLinus Torvalds { 3921e8ff2a84SJ. Bruce Fields int i, status; 39221da177e4SLinus Torvalds 3923e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3924e8ff2a84SJ. Bruce Fields if (status) 3925e8ff2a84SJ. Bruce Fields return status; 39261da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 39271da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 39281da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 39291da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 39301da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 393102cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 39321da177e4SLinus Torvalds } 39335282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 39345282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 39351da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 39361da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 39371da177e4SLinus Torvalds } 39381da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 39391da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 39401da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 39411da177e4SLinus Torvalds } 39421da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 39431da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 39441da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 39451da177e4SLinus Torvalds } 39461da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 39471da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 39481da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 39491da177e4SLinus Torvalds } 39501da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 39511da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 39521da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 39531da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3954ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3955e8ff2a84SJ. Bruce Fields return 0; 3956ac4d8ff2SNeilBrown } 3957ac4d8ff2SNeilBrown 3958190e4fbfSNeilBrown static void 3959190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3960190e4fbfSNeilBrown { 3961190e4fbfSNeilBrown int status; 3962190e4fbfSNeilBrown 39630964a3d3SNeilBrown nfs4_lock_state(); 39640964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3965190e4fbfSNeilBrown status = nfsd4_recdir_load(); 39660964a3d3SNeilBrown nfs4_unlock_state(); 3967190e4fbfSNeilBrown if (status) 3968190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3969190e4fbfSNeilBrown } 3970190e4fbfSNeilBrown 3971c2f1a551SMeelap Shah /* 3972c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3973c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3974c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3975c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3976c2f1a551SMeelap Shah * 3977c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3978c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3979c2f1a551SMeelap Shah */ 3980c2f1a551SMeelap Shah static void 3981c2f1a551SMeelap Shah set_max_delegations(void) 3982c2f1a551SMeelap Shah { 3983c2f1a551SMeelap Shah /* 3984c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3985c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3986c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3987c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3988c2f1a551SMeelap Shah */ 3989c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3990c2f1a551SMeelap Shah } 3991c2f1a551SMeelap Shah 3992ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3993ac4d8ff2SNeilBrown 399429ab23ccSJ. Bruce Fields static int 3995ac4d8ff2SNeilBrown __nfs4_state_start(void) 3996ac4d8ff2SNeilBrown { 3997b5a1a81eSJ. Bruce Fields int ret; 3998b5a1a81eSJ. Bruce Fields 39991da177e4SLinus Torvalds boot_time = get_seconds(); 4000af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 40019a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4002e46b498cSJ. Bruce Fields nfsd4_grace); 4003b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4004b5a1a81eSJ. Bruce Fields if (ret) 4005b5a1a81eSJ. Bruce Fields return -ENOMEM; 400658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 400729ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 400829ab23ccSJ. Bruce Fields return -ENOMEM; 4009b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4010b5a1a81eSJ. Bruce Fields if (ret) 4011b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4012e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4013c2f1a551SMeelap Shah set_max_delegations(); 4014b5a1a81eSJ. Bruce Fields return 0; 4015b5a1a81eSJ. Bruce Fields out_free_laundry: 4016b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4017b5a1a81eSJ. Bruce Fields return ret; 40181da177e4SLinus Torvalds } 40191da177e4SLinus Torvalds 402029ab23ccSJ. Bruce Fields int 402176a3550eSNeilBrown nfs4_state_start(void) 40221da177e4SLinus Torvalds { 402329ab23ccSJ. Bruce Fields int ret; 402429ab23ccSJ. Bruce Fields 40251da177e4SLinus Torvalds if (nfs4_init) 402629ab23ccSJ. Bruce Fields return 0; 4027190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 402829ab23ccSJ. Bruce Fields ret = __nfs4_state_start(); 402929ab23ccSJ. Bruce Fields if (ret) 403029ab23ccSJ. Bruce Fields return ret; 40311da177e4SLinus Torvalds nfs4_init = 1; 403229ab23ccSJ. Bruce Fields return 0; 40331da177e4SLinus Torvalds } 40341da177e4SLinus Torvalds 40351da177e4SLinus Torvalds static void 40361da177e4SLinus Torvalds __nfs4_state_shutdown(void) 40371da177e4SLinus Torvalds { 40381da177e4SLinus Torvalds int i; 40391da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 40401da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 40411da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 40421da177e4SLinus Torvalds 40431da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 40441da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 40451da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 40461da177e4SLinus Torvalds expire_client(clp); 40471da177e4SLinus Torvalds } 40481da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 40491da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 40501da177e4SLinus Torvalds expire_client(clp); 40511da177e4SLinus Torvalds } 40521da177e4SLinus Torvalds } 40531da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 40541da177e4SLinus Torvalds spin_lock(&recall_lock); 40551da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 40561da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 40571da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 40581da177e4SLinus Torvalds } 40591da177e4SLinus Torvalds spin_unlock(&recall_lock); 40601da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 40611da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 40621da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 40631da177e4SLinus Torvalds unhash_delegation(dp); 40641da177e4SLinus Torvalds } 40651da177e4SLinus Torvalds 4066190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 40671da177e4SLinus Torvalds nfs4_init = 0; 40681da177e4SLinus Torvalds } 40691da177e4SLinus Torvalds 40701da177e4SLinus Torvalds void 40711da177e4SLinus Torvalds nfs4_state_shutdown(void) 40721da177e4SLinus Torvalds { 40735e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 40745e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 40752c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 40761da177e4SLinus Torvalds nfs4_lock_state(); 40771da177e4SLinus Torvalds nfs4_release_reclaim(); 40781da177e4SLinus Torvalds __nfs4_state_shutdown(); 4079b5a1a81eSJ. Bruce Fields nfsd4_destroy_callback_queue(); 40801da177e4SLinus Torvalds nfs4_unlock_state(); 40811da177e4SLinus Torvalds } 40821da177e4SLinus Torvalds 40833dd98a3bSJeff Layton /* 40843dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 40853dd98a3bSJeff Layton * accessed when nfsd is starting. 40863dd98a3bSJeff Layton */ 40870964a3d3SNeilBrown static void 40880964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 40890964a3d3SNeilBrown { 40900964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 40910964a3d3SNeilBrown } 40920964a3d3SNeilBrown 40930964a3d3SNeilBrown /* 40940964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 40950964a3d3SNeilBrown */ 40960964a3d3SNeilBrown int 40970964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 40980964a3d3SNeilBrown { 40990964a3d3SNeilBrown int status; 4100a63bb996SAl Viro struct path path; 41010964a3d3SNeilBrown 4102a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 41030964a3d3SNeilBrown if (status) 41040964a3d3SNeilBrown return status; 41050964a3d3SNeilBrown status = -ENOTDIR; 4106a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 41070964a3d3SNeilBrown nfs4_set_recdir(recdir); 41080964a3d3SNeilBrown status = 0; 41090964a3d3SNeilBrown } 4110a63bb996SAl Viro path_put(&path); 41110964a3d3SNeilBrown return status; 41120964a3d3SNeilBrown } 41130964a3d3SNeilBrown 41143dd98a3bSJeff Layton char * 41153dd98a3bSJeff Layton nfs4_recoverydir(void) 41163dd98a3bSJeff Layton { 41173dd98a3bSJeff Layton return user_recovery_dirname; 41183dd98a3bSJeff Layton } 4119