11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 417df302f7SChuck Lever #include <linux/ratelimit.h> 4268e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 435976687aSJeff Layton #include <linux/sunrpc/addr.h> 446282cd56SNeilBrown #include <linux/hash.h> 459a74af21SBoaz Harrosh #include "xdr4.h" 4606b332a5SJ. Bruce Fields #include "xdr4cb.h" 470a3adadeSJ. Bruce Fields #include "vfs.h" 48bfa4b365SJ. Bruce Fields #include "current_stateid.h" 491da177e4SLinus Torvalds 505e1533c7SStanislav Kinsbursky #include "netns.h" 515e1533c7SStanislav Kinsbursky 521da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 531da177e4SLinus Torvalds 54f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 55f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 56f32f3c2dSJ. Bruce Fields .si_generation = ~0, 57f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 58f32f3c2dSJ. Bruce Fields }; 59f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 60f32f3c2dSJ. Bruce Fields /* all fields zero */ 61f32f3c2dSJ. Bruce Fields }; 6219ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6319ff0f28STigran Mkrtchyan .si_generation = 1, 6419ff0f28STigran Mkrtchyan }; 65f32f3c2dSJ. Bruce Fields 66ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 67fd39ca9aSNeilBrown 68f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 69f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7019ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* forward declarations */ 73fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 741da177e4SLinus Torvalds 758b671b80SJ. Bruce Fields /* Locking: */ 768b671b80SJ. Bruce Fields 778b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 78353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 791da177e4SLinus Torvalds 808b671b80SJ. Bruce Fields /* 818b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 828b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 838b671b80SJ. Bruce Fields * eventually cover more: 848b671b80SJ. Bruce Fields */ 85cdc97505SBenny Halevy static DEFINE_SPINLOCK(state_lock); 868b671b80SJ. Bruce Fields 87abf1135bSChristoph Hellwig static struct kmem_cache *openowner_slab; 88abf1135bSChristoph Hellwig static struct kmem_cache *lockowner_slab; 89abf1135bSChristoph Hellwig static struct kmem_cache *file_slab; 90abf1135bSChristoph Hellwig static struct kmem_cache *stateid_slab; 91abf1135bSChristoph Hellwig static struct kmem_cache *deleg_slab; 92e60d4398SNeilBrown 931da177e4SLinus Torvalds void 941da177e4SLinus Torvalds nfs4_lock_state(void) 951da177e4SLinus Torvalds { 96353ab6e9SIngo Molnar mutex_lock(&client_mutex); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 9966b2b9b2SJ. Bruce Fields static void free_session(struct nfsd4_session *); 100508dc6e1SBenny Halevy 10166b2b9b2SJ. Bruce Fields static bool is_session_dead(struct nfsd4_session *ses) 102508dc6e1SBenny Halevy { 10366b2b9b2SJ. Bruce Fields return ses->se_flags & NFS4_SESSION_DEAD; 10466b2b9b2SJ. Bruce Fields } 10566b2b9b2SJ. Bruce Fields 106f0f51f5cSJ. Bruce Fields static __be32 mark_session_dead_locked(struct nfsd4_session *ses, int ref_held_by_me) 107f0f51f5cSJ. Bruce Fields { 108f0f51f5cSJ. Bruce Fields if (atomic_read(&ses->se_ref) > ref_held_by_me) 10966b2b9b2SJ. Bruce Fields return nfserr_jukebox; 11066b2b9b2SJ. Bruce Fields ses->se_flags |= NFS4_SESSION_DEAD; 11166b2b9b2SJ. Bruce Fields return nfs_ok; 11266b2b9b2SJ. Bruce Fields } 11366b2b9b2SJ. Bruce Fields 1141da177e4SLinus Torvalds void 1151da177e4SLinus Torvalds nfs4_unlock_state(void) 1161da177e4SLinus Torvalds { 117353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 120221a6876SJ. Bruce Fields static bool is_client_expired(struct nfs4_client *clp) 121221a6876SJ. Bruce Fields { 122221a6876SJ. Bruce Fields return clp->cl_time == 0; 123221a6876SJ. Bruce Fields } 124221a6876SJ. Bruce Fields 125221a6876SJ. Bruce Fields static __be32 mark_client_expired_locked(struct nfs4_client *clp) 126221a6876SJ. Bruce Fields { 127221a6876SJ. Bruce Fields if (atomic_read(&clp->cl_refcount)) 128221a6876SJ. Bruce Fields return nfserr_jukebox; 129221a6876SJ. Bruce Fields clp->cl_time = 0; 130221a6876SJ. Bruce Fields return nfs_ok; 131221a6876SJ. Bruce Fields } 132221a6876SJ. Bruce Fields 133221a6876SJ. Bruce Fields static __be32 mark_client_expired(struct nfs4_client *clp) 134221a6876SJ. Bruce Fields { 135221a6876SJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 136221a6876SJ. Bruce Fields __be32 ret; 137221a6876SJ. Bruce Fields 138221a6876SJ. Bruce Fields spin_lock(&nn->client_lock); 139221a6876SJ. Bruce Fields ret = mark_client_expired_locked(clp); 140221a6876SJ. Bruce Fields spin_unlock(&nn->client_lock); 141221a6876SJ. Bruce Fields return ret; 142221a6876SJ. Bruce Fields } 143221a6876SJ. Bruce Fields 144221a6876SJ. Bruce Fields static __be32 get_client_locked(struct nfs4_client *clp) 145221a6876SJ. Bruce Fields { 146221a6876SJ. Bruce Fields if (is_client_expired(clp)) 147221a6876SJ. Bruce Fields return nfserr_expired; 148221a6876SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 149221a6876SJ. Bruce Fields return nfs_ok; 150221a6876SJ. Bruce Fields } 151221a6876SJ. Bruce Fields 152221a6876SJ. Bruce Fields /* must be called under the client_lock */ 153221a6876SJ. Bruce Fields static inline void 154221a6876SJ. Bruce Fields renew_client_locked(struct nfs4_client *clp) 155221a6876SJ. Bruce Fields { 156221a6876SJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 157221a6876SJ. Bruce Fields 158221a6876SJ. Bruce Fields if (is_client_expired(clp)) { 159221a6876SJ. Bruce Fields WARN_ON(1); 160221a6876SJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 161221a6876SJ. Bruce Fields __func__, 162221a6876SJ. Bruce Fields clp->cl_clientid.cl_boot, 163221a6876SJ. Bruce Fields clp->cl_clientid.cl_id); 164221a6876SJ. Bruce Fields return; 165221a6876SJ. Bruce Fields } 166221a6876SJ. Bruce Fields 167221a6876SJ. Bruce Fields dprintk("renewing client (clientid %08x/%08x)\n", 168221a6876SJ. Bruce Fields clp->cl_clientid.cl_boot, 169221a6876SJ. Bruce Fields clp->cl_clientid.cl_id); 170221a6876SJ. Bruce Fields list_move_tail(&clp->cl_lru, &nn->client_lru); 171221a6876SJ. Bruce Fields clp->cl_time = get_seconds(); 172221a6876SJ. Bruce Fields } 173221a6876SJ. Bruce Fields 174221a6876SJ. Bruce Fields static inline void 175221a6876SJ. Bruce Fields renew_client(struct nfs4_client *clp) 176221a6876SJ. Bruce Fields { 177221a6876SJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 178221a6876SJ. Bruce Fields 179221a6876SJ. Bruce Fields spin_lock(&nn->client_lock); 180221a6876SJ. Bruce Fields renew_client_locked(clp); 181221a6876SJ. Bruce Fields spin_unlock(&nn->client_lock); 182221a6876SJ. Bruce Fields } 183221a6876SJ. Bruce Fields 184ba138435SFengguang Wu static void put_client_renew_locked(struct nfs4_client *clp) 185221a6876SJ. Bruce Fields { 186221a6876SJ. Bruce Fields if (!atomic_dec_and_test(&clp->cl_refcount)) 187221a6876SJ. Bruce Fields return; 188221a6876SJ. Bruce Fields if (!is_client_expired(clp)) 189221a6876SJ. Bruce Fields renew_client_locked(clp); 190221a6876SJ. Bruce Fields } 191221a6876SJ. Bruce Fields 1924b24ca7dSJeff Layton static void put_client_renew(struct nfs4_client *clp) 1934b24ca7dSJeff Layton { 1944b24ca7dSJeff Layton struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1954b24ca7dSJeff Layton 196d6c249b4SJeff Layton if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) 197d6c249b4SJeff Layton return; 198d6c249b4SJeff Layton if (!is_client_expired(clp)) 199d6c249b4SJeff Layton renew_client_locked(clp); 2004b24ca7dSJeff Layton spin_unlock(&nn->client_lock); 2014b24ca7dSJeff Layton } 2024b24ca7dSJeff Layton 203d4e19e70STrond Myklebust static __be32 nfsd4_get_session_locked(struct nfsd4_session *ses) 204d4e19e70STrond Myklebust { 205d4e19e70STrond Myklebust __be32 status; 206d4e19e70STrond Myklebust 207d4e19e70STrond Myklebust if (is_session_dead(ses)) 208d4e19e70STrond Myklebust return nfserr_badsession; 209d4e19e70STrond Myklebust status = get_client_locked(ses->se_client); 210d4e19e70STrond Myklebust if (status) 211d4e19e70STrond Myklebust return status; 212d4e19e70STrond Myklebust atomic_inc(&ses->se_ref); 213d4e19e70STrond Myklebust return nfs_ok; 214d4e19e70STrond Myklebust } 215d4e19e70STrond Myklebust 216d4e19e70STrond Myklebust static void nfsd4_put_session_locked(struct nfsd4_session *ses) 217d4e19e70STrond Myklebust { 218d4e19e70STrond Myklebust struct nfs4_client *clp = ses->se_client; 219d4e19e70STrond Myklebust 220d4e19e70STrond Myklebust if (atomic_dec_and_test(&ses->se_ref) && is_session_dead(ses)) 221d4e19e70STrond Myklebust free_session(ses); 222d4e19e70STrond Myklebust put_client_renew_locked(clp); 223d4e19e70STrond Myklebust } 224d4e19e70STrond Myklebust 225d4e19e70STrond Myklebust static void nfsd4_put_session(struct nfsd4_session *ses) 226d4e19e70STrond Myklebust { 227d4e19e70STrond Myklebust struct nfs4_client *clp = ses->se_client; 228d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 229d4e19e70STrond Myklebust 230d4e19e70STrond Myklebust spin_lock(&nn->client_lock); 231d4e19e70STrond Myklebust nfsd4_put_session_locked(ses); 232d4e19e70STrond Myklebust spin_unlock(&nn->client_lock); 233d4e19e70STrond Myklebust } 234d4e19e70STrond Myklebust 235d4e19e70STrond Myklebust 2361da177e4SLinus Torvalds static inline u32 2371da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds u32 x = 0; 2421da177e4SLinus Torvalds while (nbytes--) { 2431da177e4SLinus Torvalds x *= 37; 2441da177e4SLinus Torvalds x += *cptr++; 2451da177e4SLinus Torvalds } 2461da177e4SLinus Torvalds return x; 2471da177e4SLinus Torvalds } 2481da177e4SLinus Torvalds 24932513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 25032513b40SJ. Bruce Fields { 25132513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 25232513b40SJ. Bruce Fields } 25332513b40SJ. Bruce Fields 25413cd2184SNeilBrown static inline void 25513cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 25613cd2184SNeilBrown { 257cdc97505SBenny Halevy if (atomic_dec_and_lock(&fi->fi_ref, &state_lock)) { 25889876f8cSJeff Layton hlist_del(&fi->fi_hash); 259cdc97505SBenny Halevy spin_unlock(&state_lock); 2608b671b80SJ. Bruce Fields iput(fi->fi_inode); 26132513b40SJ. Bruce Fields nfsd4_free_file(fi); 2628b671b80SJ. Bruce Fields } 26313cd2184SNeilBrown } 26413cd2184SNeilBrown 26513cd2184SNeilBrown static inline void 26613cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 26713cd2184SNeilBrown { 2688b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 26913cd2184SNeilBrown } 27013cd2184SNeilBrown 271ef0f3390SNeilBrown static int num_delegations; 272697ce9beSZhang Yanfei unsigned long max_delegations; 273ef0f3390SNeilBrown 274ef0f3390SNeilBrown /* 275ef0f3390SNeilBrown * Open owner state (share locks) 276ef0f3390SNeilBrown */ 277ef0f3390SNeilBrown 27816bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 27916bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 28016bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 28116bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 282ef0f3390SNeilBrown 28316bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 284ddc04c41SJ. Bruce Fields { 285ddc04c41SJ. Bruce Fields unsigned int ret; 286ddc04c41SJ. Bruce Fields 287ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 288ddc04c41SJ. Bruce Fields ret += clientid; 28916bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 290ddc04c41SJ. Bruce Fields } 291ef0f3390SNeilBrown 292ef0f3390SNeilBrown /* hash table for nfs4_file */ 293ef0f3390SNeilBrown #define FILE_HASH_BITS 8 294ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 29535079582SShan Wei 296ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 297ddc04c41SJ. Bruce Fields { 298ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 299ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 300ddc04c41SJ. Bruce Fields } 301ddc04c41SJ. Bruce Fields 30289876f8cSJeff Layton static struct hlist_head file_hashtbl[FILE_HASH_SIZE]; 303ef0f3390SNeilBrown 3043477565eSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 3053477565eSJ. Bruce Fields { 3063477565eSJ. Bruce Fields WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 3073477565eSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 3083477565eSJ. Bruce Fields } 3093477565eSJ. Bruce Fields 310998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 311998db52cSJ. Bruce Fields { 312998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 3133477565eSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 3143477565eSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 315998db52cSJ. Bruce Fields } else 3163477565eSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 317998db52cSJ. Bruce Fields } 318998db52cSJ. Bruce Fields 319998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 320f9d7562fSJ. Bruce Fields { 321f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 322f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 323f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 324f9d7562fSJ. Bruce Fields } 325f9d7562fSJ. Bruce Fields } 326f9d7562fSJ. Bruce Fields 327998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 328f9d7562fSJ. Bruce Fields { 329f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 330f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 3310c7c3e67SJ. Bruce Fields if (atomic_read(&fp->fi_access[1 - oflag]) == 0) 3323d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 333f9d7562fSJ. Bruce Fields } 334f9d7562fSJ. Bruce Fields } 335f9d7562fSJ. Bruce Fields 336998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 337998db52cSJ. Bruce Fields { 338998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 339998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 340998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 341998db52cSJ. Bruce Fields } else 342998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 343998db52cSJ. Bruce Fields } 344998db52cSJ. Bruce Fields 3453abdb607SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct 3463abdb607SJ. Bruce Fields kmem_cache *slab) 347996e0938SJ. Bruce Fields { 348996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 3493abdb607SJ. Bruce Fields struct nfs4_stid *stid; 3503abdb607SJ. Bruce Fields int new_id; 3513abdb607SJ. Bruce Fields 3523abdb607SJ. Bruce Fields stid = kmem_cache_alloc(slab, GFP_KERNEL); 3533abdb607SJ. Bruce Fields if (!stid) 3543abdb607SJ. Bruce Fields return NULL; 355996e0938SJ. Bruce Fields 356398c33aaSJeff Layton new_id = idr_alloc_cyclic(stateids, stid, 0, 0, GFP_KERNEL); 357ebd6c707STejun Heo if (new_id < 0) 3583abdb607SJ. Bruce Fields goto out_free; 3593abdb607SJ. Bruce Fields stid->sc_client = cl; 3603abdb607SJ. Bruce Fields stid->sc_type = 0; 3613abdb607SJ. Bruce Fields stid->sc_stateid.si_opaque.so_id = new_id; 3623abdb607SJ. Bruce Fields stid->sc_stateid.si_opaque.so_clid = cl->cl_clientid; 3633abdb607SJ. Bruce Fields /* Will be incremented before return to client: */ 3643abdb607SJ. Bruce Fields stid->sc_stateid.si_generation = 0; 3653abdb607SJ. Bruce Fields 366996e0938SJ. Bruce Fields /* 3673abdb607SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 3683abdb607SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 3693abdb607SJ. Bruce Fields * example, a stray write retransmission could be accepted by 3703abdb607SJ. Bruce Fields * the server when it should have been rejected. Therefore, 3713abdb607SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 3723abdb607SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 3733abdb607SJ. Bruce Fields * "increase" (mod INT_MAX): 374996e0938SJ. Bruce Fields */ 3753abdb607SJ. Bruce Fields return stid; 3763abdb607SJ. Bruce Fields out_free: 3772c44a234SWei Yongjun kmem_cache_free(slab, stid); 3783abdb607SJ. Bruce Fields return NULL; 3792a74aba7SJ. Bruce Fields } 3802a74aba7SJ. Bruce Fields 3814cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 3824cdc951bSJ. Bruce Fields { 3834cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3844cdc951bSJ. Bruce Fields } 3854cdc951bSJ. Bruce Fields 3866282cd56SNeilBrown /* 3876282cd56SNeilBrown * When we recall a delegation, we should be careful not to hand it 3886282cd56SNeilBrown * out again straight away. 3896282cd56SNeilBrown * To ensure this we keep a pair of bloom filters ('new' and 'old') 3906282cd56SNeilBrown * in which the filehandles of recalled delegations are "stored". 3916282cd56SNeilBrown * If a filehandle appear in either filter, a delegation is blocked. 3926282cd56SNeilBrown * When a delegation is recalled, the filehandle is stored in the "new" 3936282cd56SNeilBrown * filter. 3946282cd56SNeilBrown * Every 30 seconds we swap the filters and clear the "new" one, 3956282cd56SNeilBrown * unless both are empty of course. 3966282cd56SNeilBrown * 3976282cd56SNeilBrown * Each filter is 256 bits. We hash the filehandle to 32bit and use the 3986282cd56SNeilBrown * low 3 bytes as hash-table indices. 3996282cd56SNeilBrown * 4006282cd56SNeilBrown * 'state_lock', which is always held when block_delegations() is called, 4016282cd56SNeilBrown * is used to manage concurrent access. Testing does not need the lock 4026282cd56SNeilBrown * except when swapping the two filters. 4036282cd56SNeilBrown */ 4046282cd56SNeilBrown static struct bloom_pair { 4056282cd56SNeilBrown int entries, old_entries; 4066282cd56SNeilBrown time_t swap_time; 4076282cd56SNeilBrown int new; /* index into 'set' */ 4086282cd56SNeilBrown DECLARE_BITMAP(set[2], 256); 4096282cd56SNeilBrown } blocked_delegations; 4106282cd56SNeilBrown 4116282cd56SNeilBrown static int delegation_blocked(struct knfsd_fh *fh) 4126282cd56SNeilBrown { 4136282cd56SNeilBrown u32 hash; 4146282cd56SNeilBrown struct bloom_pair *bd = &blocked_delegations; 4156282cd56SNeilBrown 4166282cd56SNeilBrown if (bd->entries == 0) 4176282cd56SNeilBrown return 0; 4186282cd56SNeilBrown if (seconds_since_boot() - bd->swap_time > 30) { 4196282cd56SNeilBrown spin_lock(&state_lock); 4206282cd56SNeilBrown if (seconds_since_boot() - bd->swap_time > 30) { 4216282cd56SNeilBrown bd->entries -= bd->old_entries; 4226282cd56SNeilBrown bd->old_entries = bd->entries; 4236282cd56SNeilBrown memset(bd->set[bd->new], 0, 4246282cd56SNeilBrown sizeof(bd->set[0])); 4256282cd56SNeilBrown bd->new = 1-bd->new; 4266282cd56SNeilBrown bd->swap_time = seconds_since_boot(); 4276282cd56SNeilBrown } 4286282cd56SNeilBrown spin_unlock(&state_lock); 4296282cd56SNeilBrown } 4306282cd56SNeilBrown hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); 4316282cd56SNeilBrown if (test_bit(hash&255, bd->set[0]) && 4326282cd56SNeilBrown test_bit((hash>>8)&255, bd->set[0]) && 4336282cd56SNeilBrown test_bit((hash>>16)&255, bd->set[0])) 4346282cd56SNeilBrown return 1; 4356282cd56SNeilBrown 4366282cd56SNeilBrown if (test_bit(hash&255, bd->set[1]) && 4376282cd56SNeilBrown test_bit((hash>>8)&255, bd->set[1]) && 4386282cd56SNeilBrown test_bit((hash>>16)&255, bd->set[1])) 4396282cd56SNeilBrown return 1; 4406282cd56SNeilBrown 4416282cd56SNeilBrown return 0; 4426282cd56SNeilBrown } 4436282cd56SNeilBrown 4446282cd56SNeilBrown static void block_delegations(struct knfsd_fh *fh) 4456282cd56SNeilBrown { 4466282cd56SNeilBrown u32 hash; 4476282cd56SNeilBrown struct bloom_pair *bd = &blocked_delegations; 4486282cd56SNeilBrown 4496282cd56SNeilBrown hash = arch_fast_hash(&fh->fh_base, fh->fh_size, 0); 4506282cd56SNeilBrown 4516282cd56SNeilBrown __set_bit(hash&255, bd->set[bd->new]); 4526282cd56SNeilBrown __set_bit((hash>>8)&255, bd->set[bd->new]); 4536282cd56SNeilBrown __set_bit((hash>>16)&255, bd->set[bd->new]); 4546282cd56SNeilBrown if (bd->entries == 0) 4556282cd56SNeilBrown bd->swap_time = seconds_since_boot(); 4566282cd56SNeilBrown bd->entries += 1; 4576282cd56SNeilBrown } 4586282cd56SNeilBrown 4591da177e4SLinus Torvalds static struct nfs4_delegation * 46099c41515SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh) 4611da177e4SLinus Torvalds { 4621da177e4SLinus Torvalds struct nfs4_delegation *dp; 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 465c2f1a551SMeelap Shah if (num_delegations > max_delegations) 466ef0f3390SNeilBrown return NULL; 4676282cd56SNeilBrown if (delegation_blocked(¤t_fh->fh_handle)) 4686282cd56SNeilBrown return NULL; 469996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 4705b2d21c1SNeilBrown if (dp == NULL) 4711da177e4SLinus Torvalds return dp; 4722a74aba7SJ. Bruce Fields /* 4732a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 4746136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 4756136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 4762a74aba7SJ. Bruce Fields */ 4772a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 478ef0f3390SNeilBrown num_delegations++; 479ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 480ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 4811da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 482bf7bd3e9SJ. Bruce Fields dp->dl_file = NULL; 48399c41515SJ. Bruce Fields dp->dl_type = NFS4_OPEN_DELEGATE_READ; 4846c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 4851da177e4SLinus Torvalds dp->dl_time = 0; 4861da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 48757725155SJ. Bruce Fields nfsd4_init_callback(&dp->dl_recall); 4881da177e4SLinus Torvalds return dp; 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds 49168a33961SJ. Bruce Fields static void remove_stid(struct nfs4_stid *s) 4923abdb607SJ. Bruce Fields { 4933abdb607SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 4943abdb607SJ. Bruce Fields 4953abdb607SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 4963abdb607SJ. Bruce Fields } 4973abdb607SJ. Bruce Fields 4989857df81SBenny Halevy static void nfs4_free_stid(struct kmem_cache *slab, struct nfs4_stid *s) 4999857df81SBenny Halevy { 5009857df81SBenny Halevy kmem_cache_free(slab, s); 5019857df81SBenny Halevy } 5029857df81SBenny Halevy 5031da177e4SLinus Torvalds void 5041da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 5051da177e4SLinus Torvalds { 5061da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 5079857df81SBenny Halevy nfs4_free_stid(deleg_slab, &dp->dl_stid); 508ef0f3390SNeilBrown num_delegations--; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 512acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 5131da177e4SLinus Torvalds { 514cbf7a75bSJ. Bruce Fields if (!fp->fi_lease) 515cbf7a75bSJ. Bruce Fields return; 516acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 517acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 518acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 5194ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 520acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 521acfdf5c3SJ. Bruce Fields } 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 5246136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 5256136d2b4SJ. Bruce Fields { 5263abdb607SJ. Bruce Fields s->sc_type = 0; 5276136d2b4SJ. Bruce Fields } 5286136d2b4SJ. Bruce Fields 529931ee56cSBenny Halevy static void 530931ee56cSBenny Halevy hash_delegation_locked(struct nfs4_delegation *dp, struct nfs4_file *fp) 531931ee56cSBenny Halevy { 532cdc97505SBenny Halevy lockdep_assert_held(&state_lock); 533931ee56cSBenny Halevy 5343fb87d13SBenny Halevy dp->dl_stid.sc_type = NFS4_DELEG_STID; 535931ee56cSBenny Halevy list_add(&dp->dl_perfile, &fp->fi_delegations); 536931ee56cSBenny Halevy list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 537931ee56cSBenny Halevy } 538931ee56cSBenny Halevy 5391da177e4SLinus Torvalds /* Called under the state lock. */ 5401da177e4SLinus Torvalds static void 5411da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 5421da177e4SLinus Torvalds { 543cdc97505SBenny Halevy spin_lock(&state_lock); 544931ee56cSBenny Halevy list_del_init(&dp->dl_perclnt); 5455d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 5461da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 547cdc97505SBenny Halevy spin_unlock(&state_lock); 548cbf7a75bSJ. Bruce Fields if (dp->dl_file) { 549acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 55068a33961SJ. Bruce Fields put_nfs4_file(dp->dl_file); 55168a33961SJ. Bruce Fields dp->dl_file = NULL; 5523bd64a5bSJ. Bruce Fields } 553cbf7a75bSJ. Bruce Fields } 5543bd64a5bSJ. Bruce Fields 5553bd64a5bSJ. Bruce Fields 5563bd64a5bSJ. Bruce Fields 5573bd64a5bSJ. Bruce Fields static void destroy_revoked_delegation(struct nfs4_delegation *dp) 5583bd64a5bSJ. Bruce Fields { 5593bd64a5bSJ. Bruce Fields list_del_init(&dp->dl_recall_lru); 56068a33961SJ. Bruce Fields remove_stid(&dp->dl_stid); 5611da177e4SLinus Torvalds nfs4_put_delegation(dp); 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 5643bd64a5bSJ. Bruce Fields static void destroy_delegation(struct nfs4_delegation *dp) 5653bd64a5bSJ. Bruce Fields { 5663bd64a5bSJ. Bruce Fields unhash_delegation(dp); 5673bd64a5bSJ. Bruce Fields remove_stid(&dp->dl_stid); 5683bd64a5bSJ. Bruce Fields nfs4_put_delegation(dp); 5693bd64a5bSJ. Bruce Fields } 5703bd64a5bSJ. Bruce Fields 5713bd64a5bSJ. Bruce Fields static void revoke_delegation(struct nfs4_delegation *dp) 5723bd64a5bSJ. Bruce Fields { 5733bd64a5bSJ. Bruce Fields struct nfs4_client *clp = dp->dl_stid.sc_client; 5743bd64a5bSJ. Bruce Fields 5753bd64a5bSJ. Bruce Fields if (clp->cl_minorversion == 0) 5763bd64a5bSJ. Bruce Fields destroy_delegation(dp); 5773bd64a5bSJ. Bruce Fields else { 5783bd64a5bSJ. Bruce Fields unhash_delegation(dp); 5793bd64a5bSJ. Bruce Fields dp->dl_stid.sc_type = NFS4_REVOKED_DELEG_STID; 5803bd64a5bSJ. Bruce Fields list_add(&dp->dl_recall_lru, &clp->cl_revoked); 5813bd64a5bSJ. Bruce Fields } 5823bd64a5bSJ. Bruce Fields } 5833bd64a5bSJ. Bruce Fields 5841da177e4SLinus Torvalds /* 5851da177e4SLinus Torvalds * SETCLIENTID state 5861da177e4SLinus Torvalds */ 5871da177e4SLinus Torvalds 588ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 589ddc04c41SJ. Bruce Fields { 590ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 591ddc04c41SJ. Bruce Fields } 592ddc04c41SJ. Bruce Fields 593ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 594ddc04c41SJ. Bruce Fields { 595ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 596ddc04c41SJ. Bruce Fields } 597ddc04c41SJ. Bruce Fields 5981da177e4SLinus Torvalds /* 599f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 600f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 601f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 602f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 603f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 604f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 605f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 606f9d7562fSJ. Bruce Fields * 607f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 608f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 609f9d7562fSJ. Bruce Fields * 610f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 611f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 612f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 613f9d7562fSJ. Bruce Fields * 614f9d7562fSJ. Bruce Fields * which we should reject. 615f9d7562fSJ. Bruce Fields */ 6165ae037e5SJeff Layton static unsigned int 6175ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 618f9d7562fSJ. Bruce Fields int i; 6195ae037e5SJeff Layton unsigned int access = 0; 620f9d7562fSJ. Bruce Fields 621f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 622f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 6235ae037e5SJeff Layton access |= i; 624f9d7562fSJ. Bruce Fields } 6255ae037e5SJeff Layton return access; 626f9d7562fSJ. Bruce Fields } 627f9d7562fSJ. Bruce Fields 6283a328614SJeff Layton static bool 629dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 630f9d7562fSJ. Bruce Fields unsigned int access, deny; 631f9d7562fSJ. Bruce Fields 6325ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 6335ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 634f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 6353a328614SJeff Layton return false; 6363a328614SJeff Layton return true; 637f9d7562fSJ. Bruce Fields } 638f9d7562fSJ. Bruce Fields 63982c5ff1bSJeff Layton /* set share access for a given stateid */ 64082c5ff1bSJeff Layton static inline void 64182c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 64282c5ff1bSJeff Layton { 64382c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 64482c5ff1bSJeff Layton } 64582c5ff1bSJeff Layton 64682c5ff1bSJeff Layton /* clear share access for a given stateid */ 64782c5ff1bSJeff Layton static inline void 64882c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 64982c5ff1bSJeff Layton { 65082c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 65182c5ff1bSJeff Layton } 65282c5ff1bSJeff Layton 65382c5ff1bSJeff Layton /* test whether a given stateid has access */ 65482c5ff1bSJeff Layton static inline bool 65582c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 65682c5ff1bSJeff Layton { 65782c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 65882c5ff1bSJeff Layton } 65982c5ff1bSJeff Layton 660ce0fc43cSJeff Layton /* set share deny for a given stateid */ 661ce0fc43cSJeff Layton static inline void 662ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 663ce0fc43cSJeff Layton { 664ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 665ce0fc43cSJeff Layton } 666ce0fc43cSJeff Layton 667ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 668ce0fc43cSJeff Layton static inline void 669ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 670ce0fc43cSJeff Layton { 671ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 672ce0fc43cSJeff Layton } 673ce0fc43cSJeff Layton 674ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 675ce0fc43cSJeff Layton static inline bool 676ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 677ce0fc43cSJeff Layton { 678ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 679f9d7562fSJ. Bruce Fields } 680f9d7562fSJ. Bruce Fields 681f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 682f9d7562fSJ. Bruce Fields { 6838f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 684f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 685f9d7562fSJ. Bruce Fields return O_RDONLY; 686f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 687f9d7562fSJ. Bruce Fields return O_WRONLY; 688f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 689f9d7562fSJ. Bruce Fields return O_RDWR; 690f9d7562fSJ. Bruce Fields } 691063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 692063b0fb9SJ. Bruce Fields return O_RDONLY; 693f9d7562fSJ. Bruce Fields } 694f9d7562fSJ. Bruce Fields 69582c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 69682c5ff1bSJeff Layton static void 69782c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 69882c5ff1bSJeff Layton { 69982c5ff1bSJeff Layton int i; 70082c5ff1bSJeff Layton 70182c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 70282c5ff1bSJeff Layton if (test_access(i, stp)) 70382c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 70482c5ff1bSJeff Layton nfs4_access_to_omode(i)); 70582c5ff1bSJeff Layton clear_access(i, stp); 70682c5ff1bSJeff Layton } 70782c5ff1bSJeff Layton } 70882c5ff1bSJeff Layton 709dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 710529d7b2aSJ. Bruce Fields { 711*1d31a253STrond Myklebust struct nfs4_file *fp = stp->st_file; 712*1d31a253STrond Myklebust 713*1d31a253STrond Myklebust spin_lock(&fp->fi_lock); 714529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 715*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 716529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 717529d7b2aSJ. Bruce Fields } 718529d7b2aSJ. Bruce Fields 719dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 720529d7b2aSJ. Bruce Fields { 72182c5ff1bSJeff Layton release_all_access(stp); 722a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 7234665e2baSJ. Bruce Fields stp->st_file = NULL; 7244665e2baSJ. Bruce Fields } 7254665e2baSJ. Bruce Fields 726dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 7274665e2baSJ. Bruce Fields { 72868a33961SJ. Bruce Fields remove_stid(&stp->st_stid); 7299857df81SBenny Halevy nfs4_free_stid(stateid_slab, &stp->st_stid); 730529d7b2aSJ. Bruce Fields } 731529d7b2aSJ. Bruce Fields 7323c87b9b7STrond Myklebust static void __release_lock_stateid(struct nfs4_ol_stateid *stp) 733529d7b2aSJ. Bruce Fields { 734529d7b2aSJ. Bruce Fields struct file *file; 735529d7b2aSJ. Bruce Fields 7363c87b9b7STrond Myklebust list_del(&stp->st_locks); 737529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 7386136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 739529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 740529d7b2aSJ. Bruce Fields if (file) 741fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 74238c387b5SJ. Bruce Fields close_generic_stateid(stp); 743529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 744529d7b2aSJ. Bruce Fields } 745529d7b2aSJ. Bruce Fields 746fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 747529d7b2aSJ. Bruce Fields { 748dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 749529d7b2aSJ. Bruce Fields 750fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 751fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 752fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 753dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 7543c87b9b7STrond Myklebust __release_lock_stateid(stp); 755529d7b2aSJ. Bruce Fields } 756529d7b2aSJ. Bruce Fields } 757529d7b2aSJ. Bruce Fields 75850cc6231STrond Myklebust static void nfs4_free_lockowner(struct nfs4_lockowner *lo) 75950cc6231STrond Myklebust { 76050cc6231STrond Myklebust kfree(lo->lo_owner.so_owner.data); 76150cc6231STrond Myklebust kmem_cache_free(lockowner_slab, lo); 76250cc6231STrond Myklebust } 76350cc6231STrond Myklebust 764fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 765529d7b2aSJ. Bruce Fields { 766fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 767fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 768529d7b2aSJ. Bruce Fields } 769529d7b2aSJ. Bruce Fields 7703c87b9b7STrond Myklebust static void release_lockowner_if_empty(struct nfs4_lockowner *lo) 7713c87b9b7STrond Myklebust { 7723c87b9b7STrond Myklebust if (list_empty(&lo->lo_owner.so_stateids)) 7733c87b9b7STrond Myklebust release_lockowner(lo); 7743c87b9b7STrond Myklebust } 7753c87b9b7STrond Myklebust 7763c87b9b7STrond Myklebust static void release_lock_stateid(struct nfs4_ol_stateid *stp) 777529d7b2aSJ. Bruce Fields { 778fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 779529d7b2aSJ. Bruce Fields 7803c87b9b7STrond Myklebust lo = lockowner(stp->st_stateowner); 7813c87b9b7STrond Myklebust __release_lock_stateid(stp); 7823c87b9b7STrond Myklebust release_lockowner_if_empty(lo); 7833c87b9b7STrond Myklebust } 7843c87b9b7STrond Myklebust 7853c87b9b7STrond Myklebust static void release_open_stateid_locks(struct nfs4_ol_stateid *open_stp) 7863c87b9b7STrond Myklebust { 7873c87b9b7STrond Myklebust struct nfs4_ol_stateid *stp; 7883c87b9b7STrond Myklebust 7893c87b9b7STrond Myklebust while (!list_empty(&open_stp->st_locks)) { 7903c87b9b7STrond Myklebust stp = list_entry(open_stp->st_locks.next, 7913c87b9b7STrond Myklebust struct nfs4_ol_stateid, st_locks); 7923c87b9b7STrond Myklebust release_lock_stateid(stp); 793529d7b2aSJ. Bruce Fields } 794529d7b2aSJ. Bruce Fields } 795529d7b2aSJ. Bruce Fields 79638c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 7972283963fSJ. Bruce Fields { 7982283963fSJ. Bruce Fields unhash_generic_stateid(stp); 7993c87b9b7STrond Myklebust release_open_stateid_locks(stp); 80038c387b5SJ. Bruce Fields close_generic_stateid(stp); 80138c387b5SJ. Bruce Fields } 80238c387b5SJ. Bruce Fields 80338c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 80438c387b5SJ. Bruce Fields { 80538c387b5SJ. Bruce Fields unhash_open_stateid(stp); 8062283963fSJ. Bruce Fields free_generic_stateid(stp); 8072283963fSJ. Bruce Fields } 8082283963fSJ. Bruce Fields 809fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 810f1d110caSJ. Bruce Fields { 811dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 812f1d110caSJ. Bruce Fields 813fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 814fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 815fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 816fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 817dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 818f1d110caSJ. Bruce Fields release_open_stateid(stp); 819f1d110caSJ. Bruce Fields } 820f1d110caSJ. Bruce Fields } 821f1d110caSJ. Bruce Fields 822f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 823f7a4d872SJ. Bruce Fields { 824f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 825f7a4d872SJ. Bruce Fields 826f7a4d872SJ. Bruce Fields if (s) { 827f7a4d872SJ. Bruce Fields free_generic_stateid(s); 828f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 829f7a4d872SJ. Bruce Fields } 830f7a4d872SJ. Bruce Fields } 831f7a4d872SJ. Bruce Fields 83250cc6231STrond Myklebust static void nfs4_free_openowner(struct nfs4_openowner *oo) 83350cc6231STrond Myklebust { 83450cc6231STrond Myklebust kfree(oo->oo_owner.so_owner.data); 83550cc6231STrond Myklebust kmem_cache_free(openowner_slab, oo); 83650cc6231STrond Myklebust } 83750cc6231STrond Myklebust 838fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 839f1d110caSJ. Bruce Fields { 840fe0750e5SJ. Bruce Fields unhash_openowner(oo); 841fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 842f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 843fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 844f1d110caSJ. Bruce Fields } 845f1d110caSJ. Bruce Fields 8465282fd72SMarc Eshel static inline int 8475282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 8485282fd72SMarc Eshel { 8495282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 8505282fd72SMarc Eshel 8515282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 8525282fd72SMarc Eshel } 8535282fd72SMarc Eshel 8548f199b82STrond Myklebust #ifdef NFSD_DEBUG 8555282fd72SMarc Eshel static inline void 8565282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 8575282fd72SMarc Eshel { 8585282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 8595282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 8605282fd72SMarc Eshel } 8618f199b82STrond Myklebust #else 8628f199b82STrond Myklebust static inline void 8638f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 8648f199b82STrond Myklebust { 8658f199b82STrond Myklebust } 8668f199b82STrond Myklebust #endif 8678f199b82STrond Myklebust 8689411b1d4SJ. Bruce Fields /* 8699411b1d4SJ. Bruce Fields * Bump the seqid on cstate->replay_owner, and clear replay_owner if it 8709411b1d4SJ. Bruce Fields * won't be used for replay. 8719411b1d4SJ. Bruce Fields */ 8729411b1d4SJ. Bruce Fields void nfsd4_bump_seqid(struct nfsd4_compound_state *cstate, __be32 nfserr) 8739411b1d4SJ. Bruce Fields { 8749411b1d4SJ. Bruce Fields struct nfs4_stateowner *so = cstate->replay_owner; 8759411b1d4SJ. Bruce Fields 8769411b1d4SJ. Bruce Fields if (nfserr == nfserr_replay_me) 8779411b1d4SJ. Bruce Fields return; 8789411b1d4SJ. Bruce Fields 8799411b1d4SJ. Bruce Fields if (!seqid_mutating_err(ntohl(nfserr))) { 8809411b1d4SJ. Bruce Fields cstate->replay_owner = NULL; 8819411b1d4SJ. Bruce Fields return; 8829411b1d4SJ. Bruce Fields } 8839411b1d4SJ. Bruce Fields if (!so) 8849411b1d4SJ. Bruce Fields return; 8859411b1d4SJ. Bruce Fields if (so->so_is_open_owner) 8869411b1d4SJ. Bruce Fields release_last_closed_stateid(openowner(so)); 8879411b1d4SJ. Bruce Fields so->so_seqid++; 8889411b1d4SJ. Bruce Fields return; 8899411b1d4SJ. Bruce Fields } 8905282fd72SMarc Eshel 891ec6b5d7bSAndy Adamson static void 892ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 893ec6b5d7bSAndy Adamson { 894ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 895ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 896ec6b5d7bSAndy Adamson 897ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 898ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 899ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 900ec6b5d7bSAndy Adamson sid->reserved = 0; 901ec6b5d7bSAndy Adamson } 902ec6b5d7bSAndy Adamson 903ec6b5d7bSAndy Adamson /* 904a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 905a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 906a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 907a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 908a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 909a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 910a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 911a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 912a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 913a649637cSAndy Adamson * for the SEQUENCE op response: 914ec6b5d7bSAndy Adamson */ 915a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 916a649637cSAndy Adamson 917557ce264SAndy Adamson static void 918557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 919557ce264SAndy Adamson { 920557ce264SAndy Adamson int i; 921557ce264SAndy Adamson 922557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 923557ce264SAndy Adamson kfree(ses->se_slots[i]); 924557ce264SAndy Adamson } 925557ce264SAndy Adamson 926efe0cb6dSJ. Bruce Fields /* 927efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 928efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 929efe0cb6dSJ. Bruce Fields */ 93055c760cfSJ. Bruce Fields static inline u32 slot_bytes(struct nfsd4_channel_attrs *ca) 931efe0cb6dSJ. Bruce Fields { 93255c760cfSJ. Bruce Fields u32 size; 933efe0cb6dSJ. Bruce Fields 93455c760cfSJ. Bruce Fields if (ca->maxresp_cached < NFSD_MIN_HDR_SEQ_SZ) 93555c760cfSJ. Bruce Fields size = 0; 93655c760cfSJ. Bruce Fields else 93755c760cfSJ. Bruce Fields size = ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 93855c760cfSJ. Bruce Fields return size + sizeof(struct nfsd4_slot); 939557ce264SAndy Adamson } 940557ce264SAndy Adamson 9415b6feee9SJ. Bruce Fields /* 9425b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 9435b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 94442b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 9455b6feee9SJ. Bruce Fields */ 94655c760cfSJ. Bruce Fields static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca) 9475b6feee9SJ. Bruce Fields { 94855c760cfSJ. Bruce Fields u32 slotsize = slot_bytes(ca); 94955c760cfSJ. Bruce Fields u32 num = ca->maxreqs; 9505b6feee9SJ. Bruce Fields int avail; 9515b6feee9SJ. Bruce Fields 9525b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 953697ce9beSZhang Yanfei avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, 9545b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 9555b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 9565b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 9575b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 9585b6feee9SJ. Bruce Fields 9595b6feee9SJ. Bruce Fields return num; 9605b6feee9SJ. Bruce Fields } 9615b6feee9SJ. Bruce Fields 96255c760cfSJ. Bruce Fields static void nfsd4_put_drc_mem(struct nfsd4_channel_attrs *ca) 9635b6feee9SJ. Bruce Fields { 96455c760cfSJ. Bruce Fields int slotsize = slot_bytes(ca); 96555c760cfSJ. Bruce Fields 9665b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 96755c760cfSJ. Bruce Fields nfsd_drc_mem_used -= slotsize * ca->maxreqs; 9685b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 9695b6feee9SJ. Bruce Fields } 9705b6feee9SJ. Bruce Fields 97160810e54SKinglong Mee static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fattrs, 97260810e54SKinglong Mee struct nfsd4_channel_attrs *battrs) 9735b6feee9SJ. Bruce Fields { 97460810e54SKinglong Mee int numslots = fattrs->maxreqs; 97560810e54SKinglong Mee int slotsize = slot_bytes(fattrs); 9765b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9775b6feee9SJ. Bruce Fields int mem, i; 978ec6b5d7bSAndy Adamson 979c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 980ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 9815b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 982ec6b5d7bSAndy Adamson 9835b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 9846c18ba9fSAlexandros Batsakis if (!new) 9855b6feee9SJ. Bruce Fields return NULL; 986ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 9875b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 98855c760cfSJ. Bruce Fields new->se_slots[i] = kzalloc(slotsize, GFP_KERNEL); 9895b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 990ec6b5d7bSAndy Adamson goto out_free; 991ec6b5d7bSAndy Adamson } 99260810e54SKinglong Mee 99360810e54SKinglong Mee memcpy(&new->se_fchannel, fattrs, sizeof(struct nfsd4_channel_attrs)); 99460810e54SKinglong Mee memcpy(&new->se_bchannel, battrs, sizeof(struct nfsd4_channel_attrs)); 99560810e54SKinglong Mee 9965b6feee9SJ. Bruce Fields return new; 9975b6feee9SJ. Bruce Fields out_free: 9985b6feee9SJ. Bruce Fields while (i--) 9995b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 10005b6feee9SJ. Bruce Fields kfree(new); 10015b6feee9SJ. Bruce Fields return NULL; 10025b6feee9SJ. Bruce Fields } 10035b6feee9SJ. Bruce Fields 100419cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 100519cf5c02SJ. Bruce Fields { 100619cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 100719cf5c02SJ. Bruce Fields kfree(c); 100819cf5c02SJ. Bruce Fields } 100919cf5c02SJ. Bruce Fields 101019cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 101119cf5c02SJ. Bruce Fields { 101219cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 101319cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 101419cf5c02SJ. Bruce Fields 101519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 101619cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 101719cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 101819cf5c02SJ. Bruce Fields free_conn(c); 101919cf5c02SJ. Bruce Fields } 1020eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 10212e4b7239SJ. Bruce Fields spin_unlock(&clp->cl_lock); 102219cf5c02SJ. Bruce Fields } 102319cf5c02SJ. Bruce Fields 1024d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 1025c7662518SJ. Bruce Fields { 1026c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 1027c7662518SJ. Bruce Fields 1028c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 1029c7662518SJ. Bruce Fields if (!conn) 1030db90681dSJ. Bruce Fields return NULL; 1031c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 1032c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 1033d29c374cSJ. Bruce Fields conn->cn_flags = flags; 1034db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 1035db90681dSJ. Bruce Fields return conn; 1036db90681dSJ. Bruce Fields } 1037db90681dSJ. Bruce Fields 1038328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 1039328ead28SJ. Bruce Fields { 1040328ead28SJ. Bruce Fields conn->cn_session = ses; 1041328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 1042328ead28SJ. Bruce Fields } 1043328ead28SJ. Bruce Fields 1044db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 1045db90681dSJ. Bruce Fields { 1046db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1047c7662518SJ. Bruce Fields 1048c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 1049328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 1050c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1051db90681dSJ. Bruce Fields } 1052c7662518SJ. Bruce Fields 105321b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 1054db90681dSJ. Bruce Fields { 105519cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 105621b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 1057db90681dSJ. Bruce Fields } 1058db90681dSJ. Bruce Fields 1059e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 1060db90681dSJ. Bruce Fields { 106121b75b01SJ. Bruce Fields int ret; 1062db90681dSJ. Bruce Fields 1063db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 106421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 106521b75b01SJ. Bruce Fields if (ret) 106621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 106721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 10686a3b1563SJ. Bruce Fields if (conn->cn_flags & NFS4_CDFC4_BACK) { 106924119673SWeston Andros Adamson /* callback channel may be back up */ 107024119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 107124119673SWeston Andros Adamson } 1072c7662518SJ. Bruce Fields } 1073c7662518SJ. Bruce Fields 1074e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 10751d1bc8f2SJ. Bruce Fields { 10761d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 10771d1bc8f2SJ. Bruce Fields 1078e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 10791d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 1080e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 10811d1bc8f2SJ. Bruce Fields } 10821d1bc8f2SJ. Bruce Fields 10831d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 108419cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 1085c7662518SJ. Bruce Fields { 108619cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 108719cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 108819cf5c02SJ. Bruce Fields 108919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 109019cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 109119cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 109219cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 109319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 109419cf5c02SJ. Bruce Fields 109519cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 109619cf5c02SJ. Bruce Fields free_conn(c); 109719cf5c02SJ. Bruce Fields 109819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 109919cf5c02SJ. Bruce Fields } 110019cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1101c7662518SJ. Bruce Fields } 1102c7662518SJ. Bruce Fields 11031377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 11041377b69eSJ. Bruce Fields { 11051377b69eSJ. Bruce Fields free_session_slots(ses); 11061377b69eSJ. Bruce Fields kfree(ses); 11071377b69eSJ. Bruce Fields } 11081377b69eSJ. Bruce Fields 110966b2b9b2SJ. Bruce Fields static void free_session(struct nfsd4_session *ses) 1110508dc6e1SBenny Halevy { 1111c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); 1112c9a49628SStanislav Kinsbursky 1113c7662518SJ. Bruce Fields lockdep_assert_held(&nn->client_lock); 1114c7662518SJ. Bruce Fields nfsd4_del_conns(ses); 111555c760cfSJ. Bruce Fields nfsd4_put_drc_mem(&ses->se_fchannel); 1116c7662518SJ. Bruce Fields __free_session(ses); 1117a827bcb2SJ. Bruce Fields } 1118ec6b5d7bSAndy Adamson 1119135ae827SFengguang Wu static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 1120a827bcb2SJ. Bruce Fields { 1121a827bcb2SJ. Bruce Fields int idx; 11221872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1123a827bcb2SJ. Bruce Fields 1124ec6b5d7bSAndy Adamson new->se_client = clp; 1125ec6b5d7bSAndy Adamson gen_sessionid(new); 1126ec6b5d7bSAndy Adamson 1127c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 1128c7662518SJ. Bruce Fields 1129ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 1130ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 11318b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 1132c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 113366b2b9b2SJ. Bruce Fields atomic_set(&new->se_ref, 0); 11345b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 1135c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 11361872de0eSStanislav Kinsbursky list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); 11374c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1138ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 11394c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1140c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 114160810e54SKinglong Mee 1142dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 1143edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 1144dcbeaa68SJ. Bruce Fields /* 1145dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 1146dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 1147dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 1148dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 1149dcbeaa68SJ. Bruce Fields * future: 1150dcbeaa68SJ. Bruce Fields */ 1151edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 1152edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 1153edd76786SJ. Bruce Fields } 1154ec6b5d7bSAndy Adamson } 1155ec6b5d7bSAndy Adamson 11569089f1b4SBenny Halevy /* caller must hold client_lock */ 11575282fd72SMarc Eshel static struct nfsd4_session * 1158d4e19e70STrond Myklebust __find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) 11595282fd72SMarc Eshel { 11605282fd72SMarc Eshel struct nfsd4_session *elem; 11615282fd72SMarc Eshel int idx; 11621872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 11635282fd72SMarc Eshel 11645282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 11655282fd72SMarc Eshel idx = hash_sessionid(sessionid); 11665282fd72SMarc Eshel /* Search in the appropriate list */ 11671872de0eSStanislav Kinsbursky list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { 11685282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 11695282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 11705282fd72SMarc Eshel return elem; 11715282fd72SMarc Eshel } 11725282fd72SMarc Eshel } 11735282fd72SMarc Eshel 11745282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 11755282fd72SMarc Eshel return NULL; 11765282fd72SMarc Eshel } 11775282fd72SMarc Eshel 1178d4e19e70STrond Myklebust static struct nfsd4_session * 1179d4e19e70STrond Myklebust find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net, 1180d4e19e70STrond Myklebust __be32 *ret) 1181d4e19e70STrond Myklebust { 1182d4e19e70STrond Myklebust struct nfsd4_session *session; 1183d4e19e70STrond Myklebust __be32 status = nfserr_badsession; 1184d4e19e70STrond Myklebust 1185d4e19e70STrond Myklebust session = __find_in_sessionid_hashtbl(sessionid, net); 1186d4e19e70STrond Myklebust if (!session) 1187d4e19e70STrond Myklebust goto out; 1188d4e19e70STrond Myklebust status = nfsd4_get_session_locked(session); 1189d4e19e70STrond Myklebust if (status) 1190d4e19e70STrond Myklebust session = NULL; 1191d4e19e70STrond Myklebust out: 1192d4e19e70STrond Myklebust *ret = status; 1193d4e19e70STrond Myklebust return session; 1194d4e19e70STrond Myklebust } 1195d4e19e70STrond Myklebust 11969089f1b4SBenny Halevy /* caller must hold client_lock */ 11977116ed6bSAndy Adamson static void 11985282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 11997116ed6bSAndy Adamson { 12007116ed6bSAndy Adamson list_del(&ses->se_hash); 12014c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 12027116ed6bSAndy Adamson list_del(&ses->se_perclnt); 12034c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 12045282fd72SMarc Eshel } 12055282fd72SMarc Eshel 12061da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 12071da177e4SLinus Torvalds static int 12082c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 12091da177e4SLinus Torvalds { 12102c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 12111da177e4SLinus Torvalds return 0; 121260adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 12132c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 12141da177e4SLinus Torvalds return 1; 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds /* 12181da177e4SLinus Torvalds * XXX Should we use a slab cache ? 12191da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 12201da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 12211da177e4SLinus Torvalds */ 122235bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds struct nfs4_client *clp; 12251da177e4SLinus Torvalds 122635bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 122735bba9a3SJ. Bruce Fields if (clp == NULL) 122835bba9a3SJ. Bruce Fields return NULL; 122967114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 123035bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 123135bba9a3SJ. Bruce Fields kfree(clp); 123235bba9a3SJ. Bruce Fields return NULL; 123335bba9a3SJ. Bruce Fields } 12341da177e4SLinus Torvalds clp->cl_name.len = name.len; 12355694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_sessions); 12365694c93eSTrond Myklebust idr_init(&clp->cl_stateids); 12375694c93eSTrond Myklebust atomic_set(&clp->cl_refcount, 0); 12385694c93eSTrond Myklebust clp->cl_cb_state = NFSD4_CB_UNKNOWN; 12395694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_idhash); 12405694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_openowners); 12415694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_delegations); 12425694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_lru); 12435694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_callbacks); 12445694c93eSTrond Myklebust INIT_LIST_HEAD(&clp->cl_revoked); 12455694c93eSTrond Myklebust spin_lock_init(&clp->cl_lock); 12465694c93eSTrond Myklebust rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 12471da177e4SLinus Torvalds return clp; 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 12504dd86e15STrond Myklebust static void 12511da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 12521da177e4SLinus Torvalds { 1253bca0ec65SStanislav Kinsbursky struct nfsd_net __maybe_unused *nn = net_generic(clp->net, nfsd_net_id); 1254c9a49628SStanislav Kinsbursky 1255c9a49628SStanislav Kinsbursky lockdep_assert_held(&nn->client_lock); 1256792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1257792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1258792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1259792c95ddSJ. Bruce Fields se_perclnt); 1260792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 126166b2b9b2SJ. Bruce Fields WARN_ON_ONCE(atomic_read(&ses->se_ref)); 126266b2b9b2SJ. Bruce Fields free_session(ses); 1263792c95ddSJ. Bruce Fields } 12644cb57e30STrond Myklebust rpc_destroy_wait_queue(&clp->cl_cb_waitq); 126503a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 12661da177e4SLinus Torvalds kfree(clp->cl_name.data); 12672d32b29aSmajianpeng idr_destroy(&clp->cl_stateids); 12681da177e4SLinus Torvalds kfree(clp); 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 127184d38ac9SBenny Halevy /* must be called under the client_lock */ 127284d38ac9SBenny Halevy static inline void 127384d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 127484d38ac9SBenny Halevy { 1275792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1276792c95ddSJ. Bruce Fields 127784d38ac9SBenny Halevy list_del(&clp->cl_lru); 12784c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1279792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1280792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 12814c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 128284d38ac9SBenny Halevy } 128384d38ac9SBenny Halevy 12841da177e4SLinus Torvalds static void 12850d22f68fSJ. Bruce Fields destroy_client(struct nfs4_client *clp) 12861da177e4SLinus Torvalds { 1287fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 12881da177e4SLinus Torvalds struct nfs4_delegation *dp; 12891da177e4SLinus Torvalds struct list_head reaplist; 1290382a62e7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 1293cdc97505SBenny Halevy spin_lock(&state_lock); 1294ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1295ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1296ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 1297dff1399fSJeff Layton /* Ensure that deleg break won't try to requeue it */ 1298dff1399fSJeff Layton ++dp->dl_time; 12991da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 13001da177e4SLinus Torvalds } 1301cdc97505SBenny Halevy spin_unlock(&state_lock); 13021da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 13031da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 13043bd64a5bSJ. Bruce Fields destroy_delegation(dp); 13051da177e4SLinus Torvalds } 1306956c4feeSBenny Halevy list_splice_init(&clp->cl_revoked, &reaplist); 1307956c4feeSBenny Halevy while (!list_empty(&reaplist)) { 1308956c4feeSBenny Halevy dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 1309956c4feeSBenny Halevy destroy_revoked_delegation(dp); 1310956c4feeSBenny Halevy } 1311ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1312fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1313fe0750e5SJ. Bruce Fields release_openowner(oo); 13141da177e4SLinus Torvalds } 13156ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 13162bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 13172bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 131884d38ac9SBenny Halevy list_del(&clp->cl_idhash); 1319ac55fdc4SJeff Layton if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) 1320382a62e7SStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->conf_name_tree); 1321ac55fdc4SJeff Layton else 1322a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 1323c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 132484d38ac9SBenny Halevy unhash_client_locked(clp); 1325221a6876SJ. Bruce Fields WARN_ON_ONCE(atomic_read(&clp->cl_refcount)); 1326b12a05cbSJ. Bruce Fields free_client(clp); 1327c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 13281da177e4SLinus Torvalds } 13291da177e4SLinus Torvalds 13300d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 13310d22f68fSJ. Bruce Fields { 13320d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 13330d22f68fSJ. Bruce Fields destroy_client(clp); 13340d22f68fSJ. Bruce Fields } 13350d22f68fSJ. Bruce Fields 133635bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 133735bba9a3SJ. Bruce Fields { 133835bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 133935bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 134235bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 134335bba9a3SJ. Bruce Fields { 13441da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 13451da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 13461da177e4SLinus Torvalds } 13471da177e4SLinus Torvalds 134803a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 134935bba9a3SJ. Bruce Fields { 135003a4e1f6SJ. Bruce Fields if (source->cr_principal) { 135103a4e1f6SJ. Bruce Fields target->cr_principal = 135203a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 135303a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 135403a4e1f6SJ. Bruce Fields return -ENOMEM; 135503a4e1f6SJ. Bruce Fields } else 135603a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1357d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 13581da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 13591da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 13601da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 13611da177e4SLinus Torvalds get_group_info(target->cr_group_info); 13620dc1531aSJ. Bruce Fields target->cr_gss_mech = source->cr_gss_mech; 13630dc1531aSJ. Bruce Fields if (source->cr_gss_mech) 13640dc1531aSJ. Bruce Fields gss_mech_get(source->cr_gss_mech); 136503a4e1f6SJ. Bruce Fields return 0; 13661da177e4SLinus Torvalds } 13671da177e4SLinus Torvalds 1368ac55fdc4SJeff Layton static long long 1369ac55fdc4SJeff Layton compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) 1370ac55fdc4SJeff Layton { 1371ac55fdc4SJeff Layton long long res; 1372ac55fdc4SJeff Layton 1373ac55fdc4SJeff Layton res = o1->len - o2->len; 1374ac55fdc4SJeff Layton if (res) 1375ac55fdc4SJeff Layton return res; 1376ac55fdc4SJeff Layton return (long long)memcmp(o1->data, o2->data, o1->len); 1377ac55fdc4SJeff Layton } 1378ac55fdc4SJeff Layton 137935bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1380599e0a22SJ. Bruce Fields { 1381a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 13821da177e4SLinus Torvalds } 13831da177e4SLinus Torvalds 13841da177e4SLinus Torvalds static int 1385599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1386599e0a22SJ. Bruce Fields { 1387599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds static int 1391599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1392599e0a22SJ. Bruce Fields { 1393599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 13941da177e4SLinus Torvalds } 13951da177e4SLinus Torvalds 13968fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 13978fbba96eSJ. Bruce Fields { 13988fbba96eSJ. Bruce Fields int i; 13998fbba96eSJ. Bruce Fields 14008fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 14018fbba96eSJ. Bruce Fields return false; 14028fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 14036fab8779SEric W. Biederman if (!gid_eq(GROUP_AT(g1, i), GROUP_AT(g2, i))) 14048fbba96eSJ. Bruce Fields return false; 14058fbba96eSJ. Bruce Fields return true; 14068fbba96eSJ. Bruce Fields } 14078fbba96eSJ. Bruce Fields 140868eb3508SJ. Bruce Fields /* 140968eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 141068eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 141168eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 141268eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 141368eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 141468eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 141568eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 141668eb3508SJ. Bruce Fields */ 141768eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 141868eb3508SJ. Bruce Fields { 141968eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 142068eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 142168eb3508SJ. Bruce Fields } 142268eb3508SJ. Bruce Fields 142368eb3508SJ. Bruce Fields 14245559b50aSVivek Trivedi static bool 1425599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1426599e0a22SJ. Bruce Fields { 142768eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 14286fab8779SEric W. Biederman || (!uid_eq(cr1->cr_uid, cr2->cr_uid)) 14296fab8779SEric W. Biederman || (!gid_eq(cr1->cr_gid, cr2->cr_gid)) 14308fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 14318fbba96eSJ. Bruce Fields return false; 14328fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 14338fbba96eSJ. Bruce Fields return true; 14348fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 14358fbba96eSJ. Bruce Fields return false; 14365559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds 143957266a6eSJ. Bruce Fields static bool svc_rqst_integrity_protected(struct svc_rqst *rqstp) 144057266a6eSJ. Bruce Fields { 144157266a6eSJ. Bruce Fields struct svc_cred *cr = &rqstp->rq_cred; 144257266a6eSJ. Bruce Fields u32 service; 144357266a6eSJ. Bruce Fields 1444c4720591SJ. Bruce Fields if (!cr->cr_gss_mech) 1445c4720591SJ. Bruce Fields return false; 144657266a6eSJ. Bruce Fields service = gss_pseudoflavor_to_service(cr->cr_gss_mech, cr->cr_flavor); 144757266a6eSJ. Bruce Fields return service == RPC_GSS_SVC_INTEGRITY || 144857266a6eSJ. Bruce Fields service == RPC_GSS_SVC_PRIVACY; 144957266a6eSJ. Bruce Fields } 145057266a6eSJ. Bruce Fields 145157266a6eSJ. Bruce Fields static bool mach_creds_match(struct nfs4_client *cl, struct svc_rqst *rqstp) 145257266a6eSJ. Bruce Fields { 145357266a6eSJ. Bruce Fields struct svc_cred *cr = &rqstp->rq_cred; 145457266a6eSJ. Bruce Fields 145557266a6eSJ. Bruce Fields if (!cl->cl_mach_cred) 145657266a6eSJ. Bruce Fields return true; 145757266a6eSJ. Bruce Fields if (cl->cl_cred.cr_gss_mech != cr->cr_gss_mech) 145857266a6eSJ. Bruce Fields return false; 145957266a6eSJ. Bruce Fields if (!svc_rqst_integrity_protected(rqstp)) 146057266a6eSJ. Bruce Fields return false; 146157266a6eSJ. Bruce Fields if (!cr->cr_principal) 146257266a6eSJ. Bruce Fields return false; 146357266a6eSJ. Bruce Fields return 0 == strcmp(cl->cl_cred.cr_principal, cr->cr_principal); 146457266a6eSJ. Bruce Fields } 146557266a6eSJ. Bruce Fields 1466c212cecfSStanislav Kinsbursky static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) 14675ec7b46cSJ. Bruce Fields { 14685ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 14695ec7b46cSJ. Bruce Fields 14702c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 14711da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds 1474deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1475deda2faaSJ. Bruce Fields { 1476ab4684d1SChuck Lever __be32 verf[2]; 1477deda2faaSJ. Bruce Fields static u32 i; 14781da177e4SLinus Torvalds 1479f419992cSJeff Layton /* 1480f419992cSJeff Layton * This is opaque to client, so no need to byte-swap. Use 1481f419992cSJeff Layton * __force to keep sparse happy 1482f419992cSJeff Layton */ 1483f419992cSJeff Layton verf[0] = (__force __be32)get_seconds(); 1484f419992cSJeff Layton verf[1] = (__force __be32)i++; 1485ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 14861da177e4SLinus Torvalds } 14871da177e4SLinus Torvalds 148838c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 14894581d140SJ. Bruce Fields { 14903abdb607SJ. Bruce Fields struct nfs4_stid *ret; 14913abdb607SJ. Bruce Fields 14923abdb607SJ. Bruce Fields ret = idr_find(&cl->cl_stateids, t->si_opaque.so_id); 14933abdb607SJ. Bruce Fields if (!ret || !ret->sc_type) 14943abdb607SJ. Bruce Fields return NULL; 14953abdb607SJ. Bruce Fields return ret; 14964581d140SJ. Bruce Fields } 14974d71ab87SJ. Bruce Fields 149838c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1499f459e453SJ. Bruce Fields { 1500f459e453SJ. Bruce Fields struct nfs4_stid *s; 1501f459e453SJ. Bruce Fields 150238c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1503f459e453SJ. Bruce Fields if (!s) 1504f459e453SJ. Bruce Fields return NULL; 1505f459e453SJ. Bruce Fields if (typemask & s->sc_type) 15064d71ab87SJ. Bruce Fields return s; 15074581d140SJ. Bruce Fields return NULL; 15084581d140SJ. Bruce Fields } 15094581d140SJ. Bruce Fields 15102216d449SJeff Layton static struct nfs4_client *create_client(struct xdr_netobj name, 1511b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1512b09333c4SRicardo Labiaga { 1513b09333c4SRicardo Labiaga struct nfs4_client *clp; 1514b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 151503a4e1f6SJ. Bruce Fields int ret; 1516c212cecfSStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 1517c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1518b09333c4SRicardo Labiaga 1519b09333c4SRicardo Labiaga clp = alloc_client(name); 1520b09333c4SRicardo Labiaga if (clp == NULL) 1521b09333c4SRicardo Labiaga return NULL; 1522b09333c4SRicardo Labiaga 152303a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 152403a4e1f6SJ. Bruce Fields if (ret) { 1525c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 1526b09333c4SRicardo Labiaga free_client(clp); 1527c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1528b09333c4SRicardo Labiaga return NULL; 1529b09333c4SRicardo Labiaga } 153057725155SJ. Bruce Fields nfsd4_init_callback(&clp->cl_cb_null); 153107cd4909SBenny Halevy clp->cl_time = get_seconds(); 1532b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1533b09333c4SRicardo Labiaga copy_verf(clp, verf); 1534b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1535b09333c4SRicardo Labiaga gen_confirm(clp); 1536edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1537c212cecfSStanislav Kinsbursky clp->net = net; 1538b09333c4SRicardo Labiaga return clp; 1539b09333c4SRicardo Labiaga } 1540b09333c4SRicardo Labiaga 1541fd39ca9aSNeilBrown static void 1542ac55fdc4SJeff Layton add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) 1543ac55fdc4SJeff Layton { 1544ac55fdc4SJeff Layton struct rb_node **new = &(root->rb_node), *parent = NULL; 1545ac55fdc4SJeff Layton struct nfs4_client *clp; 1546ac55fdc4SJeff Layton 1547ac55fdc4SJeff Layton while (*new) { 1548ac55fdc4SJeff Layton clp = rb_entry(*new, struct nfs4_client, cl_namenode); 1549ac55fdc4SJeff Layton parent = *new; 1550ac55fdc4SJeff Layton 1551ac55fdc4SJeff Layton if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) 1552ac55fdc4SJeff Layton new = &((*new)->rb_left); 1553ac55fdc4SJeff Layton else 1554ac55fdc4SJeff Layton new = &((*new)->rb_right); 1555ac55fdc4SJeff Layton } 1556ac55fdc4SJeff Layton 1557ac55fdc4SJeff Layton rb_link_node(&new_clp->cl_namenode, parent, new); 1558ac55fdc4SJeff Layton rb_insert_color(&new_clp->cl_namenode, root); 1559ac55fdc4SJeff Layton } 1560ac55fdc4SJeff Layton 1561ac55fdc4SJeff Layton static struct nfs4_client * 1562ac55fdc4SJeff Layton find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) 1563ac55fdc4SJeff Layton { 1564ac55fdc4SJeff Layton long long cmp; 1565ac55fdc4SJeff Layton struct rb_node *node = root->rb_node; 1566ac55fdc4SJeff Layton struct nfs4_client *clp; 1567ac55fdc4SJeff Layton 1568ac55fdc4SJeff Layton while (node) { 1569ac55fdc4SJeff Layton clp = rb_entry(node, struct nfs4_client, cl_namenode); 1570ac55fdc4SJeff Layton cmp = compare_blob(&clp->cl_name, name); 1571ac55fdc4SJeff Layton if (cmp > 0) 1572ac55fdc4SJeff Layton node = node->rb_left; 1573ac55fdc4SJeff Layton else if (cmp < 0) 1574ac55fdc4SJeff Layton node = node->rb_right; 1575ac55fdc4SJeff Layton else 1576ac55fdc4SJeff Layton return clp; 1577ac55fdc4SJeff Layton } 1578ac55fdc4SJeff Layton return NULL; 1579ac55fdc4SJeff Layton } 1580ac55fdc4SJeff Layton 1581ac55fdc4SJeff Layton static void 1582ac55fdc4SJeff Layton add_to_unconfirmed(struct nfs4_client *clp) 15831da177e4SLinus Torvalds { 15841da177e4SLinus Torvalds unsigned int idhashval; 15850a7ec377SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 15861da177e4SLinus Torvalds 1587ac55fdc4SJeff Layton clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 1588a99454aaSStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->unconf_name_tree); 15891da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 15900a7ec377SStanislav Kinsbursky list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); 159136acb66bSBenny Halevy renew_client(clp); 15921da177e4SLinus Torvalds } 15931da177e4SLinus Torvalds 1594fd39ca9aSNeilBrown static void 15951da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 15961da177e4SLinus Torvalds { 15971da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 15988daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 15991da177e4SLinus Torvalds 16001da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 16018daae4dcSStanislav Kinsbursky list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); 1602a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 1603382a62e7SStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->conf_name_tree); 1604ac55fdc4SJeff Layton set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 16051da177e4SLinus Torvalds renew_client(clp); 16061da177e4SLinus Torvalds } 16071da177e4SLinus Torvalds 16081da177e4SLinus Torvalds static struct nfs4_client * 1609bfa85e83SJ. Bruce Fields find_client_in_id_table(struct list_head *tbl, clientid_t *clid, bool sessions) 16101da177e4SLinus Torvalds { 16111da177e4SLinus Torvalds struct nfs4_client *clp; 16121da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 16131da177e4SLinus Torvalds 1614bfa85e83SJ. Bruce Fields list_for_each_entry(clp, &tbl[idhashval], cl_idhash) { 1615a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1616d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1617d15c077eSJ. Bruce Fields return NULL; 1618a50d2ad1SJ. Bruce Fields renew_client(clp); 16191da177e4SLinus Torvalds return clp; 16201da177e4SLinus Torvalds } 1621a50d2ad1SJ. Bruce Fields } 16221da177e4SLinus Torvalds return NULL; 16231da177e4SLinus Torvalds } 16241da177e4SLinus Torvalds 16251da177e4SLinus Torvalds static struct nfs4_client * 1626bfa85e83SJ. Bruce Fields find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 1627bfa85e83SJ. Bruce Fields { 1628bfa85e83SJ. Bruce Fields struct list_head *tbl = nn->conf_id_hashtbl; 1629bfa85e83SJ. Bruce Fields 1630bfa85e83SJ. Bruce Fields return find_client_in_id_table(tbl, clid, sessions); 1631bfa85e83SJ. Bruce Fields } 1632bfa85e83SJ. Bruce Fields 1633bfa85e83SJ. Bruce Fields static struct nfs4_client * 16340a7ec377SStanislav Kinsbursky find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 16351da177e4SLinus Torvalds { 1636bfa85e83SJ. Bruce Fields struct list_head *tbl = nn->unconf_id_hashtbl; 16371da177e4SLinus Torvalds 1638bfa85e83SJ. Bruce Fields return find_client_in_id_table(tbl, clid, sessions); 16391da177e4SLinus Torvalds } 16401da177e4SLinus Torvalds 16416e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1642a1bcecd2SAndy Adamson { 16436e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1644a1bcecd2SAndy Adamson } 1645a1bcecd2SAndy Adamson 164628ce6054SNeilBrown static struct nfs4_client * 1647382a62e7SStanislav Kinsbursky find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 164828ce6054SNeilBrown { 1649382a62e7SStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->conf_name_tree); 165028ce6054SNeilBrown } 165128ce6054SNeilBrown 165228ce6054SNeilBrown static struct nfs4_client * 1653a99454aaSStanislav Kinsbursky find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 165428ce6054SNeilBrown { 1655a99454aaSStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->unconf_name_tree); 165628ce6054SNeilBrown } 165728ce6054SNeilBrown 1658fd39ca9aSNeilBrown static void 16596f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 16601da177e4SLinus Torvalds { 166107263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 16626f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 16636f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 16647077ecbaSJeff Layton unsigned short expected_family; 16651da177e4SLinus Torvalds 16667077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 16677077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 16687077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 16697077ecbaSJeff Layton expected_family = AF_INET; 16707077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 16717077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 16727077ecbaSJeff Layton expected_family = AF_INET6; 16737077ecbaSJeff Layton else 16741da177e4SLinus Torvalds goto out_err; 16751da177e4SLinus Torvalds 1676c212cecfSStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, 1677aa9a4ec7SJeff Layton se->se_callback_addr_len, 167807263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 167907263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1680aa9a4ec7SJeff Layton 168107263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 16821da177e4SLinus Torvalds goto out_err; 1683aa9a4ec7SJeff Layton 168407263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 168507263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1686fbf4665fSJeff Layton 168707263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 168807263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1689849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 16901da177e4SLinus Torvalds return; 16911da177e4SLinus Torvalds out_err: 169207263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 169307263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1694849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 16951da177e4SLinus Torvalds "will not receive delegations\n", 16961da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds return; 16991da177e4SLinus Torvalds } 17001da177e4SLinus Torvalds 1701074fe897SAndy Adamson /* 1702067e1aceSJ. Bruce Fields * Cache a reply. nfsd4_check_resp_size() has bounded the cache size. 1703074fe897SAndy Adamson */ 1704b607664eSTrond Myklebust static void 1705074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1706074fe897SAndy Adamson { 1707f5236013SJ. Bruce Fields struct xdr_buf *buf = resp->xdr.buf; 1708557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1709557ce264SAndy Adamson unsigned int base; 1710074fe897SAndy Adamson 1711557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1712074fe897SAndy Adamson 1713557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1714557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1715bf864a31SAndy Adamson 1716bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1717bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1718557ce264SAndy Adamson slot->sl_datalen = 0; 1719bf864a31SAndy Adamson return; 1720bf864a31SAndy Adamson } 1721f5236013SJ. Bruce Fields base = resp->cstate.data_offset; 1722f5236013SJ. Bruce Fields slot->sl_datalen = buf->len - base; 1723f5236013SJ. Bruce Fields if (read_bytes_from_xdr_buf(buf, base, slot->sl_data, slot->sl_datalen)) 1724557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1725557ce264SAndy Adamson return; 1726074fe897SAndy Adamson } 1727074fe897SAndy Adamson 1728074fe897SAndy Adamson /* 1729abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1730abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1731abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1732abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1733abfabf8cSAndy Adamson * 1734074fe897SAndy Adamson */ 1735abfabf8cSAndy Adamson static __be32 1736abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1737abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1738074fe897SAndy Adamson { 1739abfabf8cSAndy Adamson struct nfsd4_op *op; 1740abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1741074fe897SAndy Adamson 1742abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1743abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1744abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1745abfabf8cSAndy Adamson 1746abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 174773e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1748abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1749abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1750abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1751074fe897SAndy Adamson } 1752abfabf8cSAndy Adamson return op->status; 1753074fe897SAndy Adamson } 1754074fe897SAndy Adamson 1755074fe897SAndy Adamson /* 1756557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1757557ce264SAndy Adamson * session values. 1758074fe897SAndy Adamson */ 17593ca2eb98SJ. Bruce Fields static __be32 1760bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1761bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1762074fe897SAndy Adamson { 1763557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1764f5236013SJ. Bruce Fields struct xdr_stream *xdr = &resp->xdr; 1765f5236013SJ. Bruce Fields __be32 *p; 1766074fe897SAndy Adamson __be32 status; 1767074fe897SAndy Adamson 1768557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1769074fe897SAndy Adamson 1770abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 17710da7b19cSJ. Bruce Fields if (status) 1772abfabf8cSAndy Adamson return status; 1773074fe897SAndy Adamson 1774f5236013SJ. Bruce Fields p = xdr_reserve_space(xdr, slot->sl_datalen); 1775f5236013SJ. Bruce Fields if (!p) { 1776f5236013SJ. Bruce Fields WARN_ON_ONCE(1); 1777f5236013SJ. Bruce Fields return nfserr_serverfault; 1778f5236013SJ. Bruce Fields } 1779f5236013SJ. Bruce Fields xdr_encode_opaque_fixed(p, slot->sl_data, slot->sl_datalen); 1780f5236013SJ. Bruce Fields xdr_commit_encode(xdr); 1781074fe897SAndy Adamson 1782557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1783f5236013SJ. Bruce Fields return slot->sl_status; 1784074fe897SAndy Adamson } 1785074fe897SAndy Adamson 17860733d213SAndy Adamson /* 17870733d213SAndy Adamson * Set the exchange_id flags returned by the server. 17880733d213SAndy Adamson */ 17890733d213SAndy Adamson static void 17900733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 17910733d213SAndy Adamson { 17920733d213SAndy Adamson /* pNFS is not supported */ 17930733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 17940733d213SAndy Adamson 17950733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 17960733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 17970733d213SAndy Adamson 17980733d213SAndy Adamson /* set the wire flags to return to client. */ 17990733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 18000733d213SAndy Adamson } 18010733d213SAndy Adamson 1802631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1803631fc9eaSJ. Bruce Fields { 1804631fc9eaSJ. Bruce Fields /* 1805631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1806631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1807631fc9eaSJ. Bruce Fields * 1808631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1809631fc9eaSJ. Bruce Fields */ 18106eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 18116eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 18126eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1813631fc9eaSJ. Bruce Fields } 1814631fc9eaSJ. Bruce Fields 1815b37ad28bSAl Viro __be32 1816069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1817069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1818069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1819069b6ad4SAndy Adamson { 18200733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 182157b7b43bSJ. Bruce Fields __be32 status; 1822363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 18230733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1824363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 182583e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 1826c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 18270733d213SAndy Adamson 1828363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 18290733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1830363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 18310733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1832363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 18330733d213SAndy Adamson 1834a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 18350733d213SAndy Adamson return nfserr_inval; 18360733d213SAndy Adamson 18370733d213SAndy Adamson switch (exid->spa_how) { 183857266a6eSJ. Bruce Fields case SP4_MACH_CRED: 183957266a6eSJ. Bruce Fields if (!svc_rqst_integrity_protected(rqstp)) 184057266a6eSJ. Bruce Fields return nfserr_inval; 18410733d213SAndy Adamson case SP4_NONE: 18420733d213SAndy Adamson break; 1843063b0fb9SJ. Bruce Fields default: /* checked by xdr code */ 1844063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 18450733d213SAndy Adamson case SP4_SSV: 1846dd30333cSJ. Bruce Fields return nfserr_encr_alg_unsupp; 18470733d213SAndy Adamson } 18480733d213SAndy Adamson 18492dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 18500733d213SAndy Adamson nfs4_lock_state(); 1851382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&exid->clname, nn); 18520733d213SAndy Adamson if (conf) { 185383e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 185483e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 185583e08fd4SJ. Bruce Fields 1856136e658dSJ. Bruce Fields if (update) { 1857136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 18582dbb269dSJ. Bruce Fields status = nfserr_inval; 1859e203d506SJ. Bruce Fields goto out; 1860e203d506SJ. Bruce Fields } 186157266a6eSJ. Bruce Fields if (!mach_creds_match(conf, rqstp)) { 186257266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 186357266a6eSJ. Bruce Fields goto out; 186457266a6eSJ. Bruce Fields } 18652dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 18660733d213SAndy Adamson status = nfserr_perm; 18670733d213SAndy Adamson goto out; 18680733d213SAndy Adamson } 18692dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 18700733d213SAndy Adamson status = nfserr_not_same; 18710733d213SAndy Adamson goto out; 18720733d213SAndy Adamson } 1873136e658dSJ. Bruce Fields /* case 6 */ 18740733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 18750733d213SAndy Adamson new = conf; 18760733d213SAndy Adamson goto out_copy; 18776ddbbbfeSMike Sager } 1878136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1879631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1880136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1881136e658dSJ. Bruce Fields goto out; 1882136e658dSJ. Bruce Fields } 1883b9831b59SJ. Bruce Fields expire_client(conf); 1884b9831b59SJ. Bruce Fields goto out_new; 1885631fc9eaSJ. Bruce Fields } 1886136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 18870f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1888136e658dSJ. Bruce Fields new = conf; 1889136e658dSJ. Bruce Fields goto out_copy; 1890136e658dSJ. Bruce Fields } 18912dbb269dSJ. Bruce Fields /* case 5, client reboot */ 18920733d213SAndy Adamson goto out_new; 18930733d213SAndy Adamson } 18946ddbbbfeSMike Sager 18952dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 18960733d213SAndy Adamson status = nfserr_noent; 18970733d213SAndy Adamson goto out; 18980733d213SAndy Adamson } 18990733d213SAndy Adamson 1900a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&exid->clname, nn); 19012dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 19020733d213SAndy Adamson expire_client(unconf); 19030733d213SAndy Adamson 19042dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 19050733d213SAndy Adamson out_new: 19062216d449SJeff Layton new = create_client(exid->clname, rqstp, &verf); 19070733d213SAndy Adamson if (new == NULL) { 19084731030dSJ. Bruce Fields status = nfserr_jukebox; 19090733d213SAndy Adamson goto out; 19100733d213SAndy Adamson } 19114f540e29SJ. Bruce Fields new->cl_minorversion = cstate->minorversion; 191257266a6eSJ. Bruce Fields new->cl_mach_cred = (exid->spa_how == SP4_MACH_CRED); 19130733d213SAndy Adamson 1914c212cecfSStanislav Kinsbursky gen_clid(new, nn); 1915ac55fdc4SJeff Layton add_to_unconfirmed(new); 19160733d213SAndy Adamson out_copy: 19170733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 19180733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 19190733d213SAndy Adamson 1920778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 19210733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 19220733d213SAndy Adamson 19230733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 192449557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 19250733d213SAndy Adamson status = nfs_ok; 19260733d213SAndy Adamson 19270733d213SAndy Adamson out: 19280733d213SAndy Adamson nfs4_unlock_state(); 19290733d213SAndy Adamson return status; 1930069b6ad4SAndy Adamson } 1931069b6ad4SAndy Adamson 193257b7b43bSJ. Bruce Fields static __be32 193388e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1934b85d4c01SBenny Halevy { 193588e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 193688e588d5SAndy Adamson slot_seqid); 1937b85d4c01SBenny Halevy 1938b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 193988e588d5SAndy Adamson if (slot_inuse) { 194088e588d5SAndy Adamson if (seqid == slot_seqid) 1941b85d4c01SBenny Halevy return nfserr_jukebox; 1942b85d4c01SBenny Halevy else 1943b85d4c01SBenny Halevy return nfserr_seq_misordered; 1944b85d4c01SBenny Halevy } 1945f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 194688e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1947b85d4c01SBenny Halevy return nfs_ok; 194888e588d5SAndy Adamson if (seqid == slot_seqid) 1949b85d4c01SBenny Halevy return nfserr_replay_cache; 1950b85d4c01SBenny Halevy return nfserr_seq_misordered; 1951b85d4c01SBenny Halevy } 1952b85d4c01SBenny Halevy 195349557cc7SAndy Adamson /* 195449557cc7SAndy Adamson * Cache the create session result into the create session single DRC 195549557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 195649557cc7SAndy Adamson * Do this for solo or embedded create session operations. 195749557cc7SAndy Adamson */ 195849557cc7SAndy Adamson static void 195949557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 196057b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 196149557cc7SAndy Adamson { 196249557cc7SAndy Adamson slot->sl_status = nfserr; 196349557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 196449557cc7SAndy Adamson } 196549557cc7SAndy Adamson 196649557cc7SAndy Adamson static __be32 196749557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 196849557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 196949557cc7SAndy Adamson { 197049557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 197149557cc7SAndy Adamson return slot->sl_status; 197249557cc7SAndy Adamson } 197349557cc7SAndy Adamson 19741b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 19751b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 19761b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 19771b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 19781b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 19791b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 19801b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 19811b74c25bSMi Jinlong 19821b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 19831b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 19841b74c25bSMi Jinlong 1 + /* status */ \ 19851b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 19861b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 19871b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 19881b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 19891b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 19901b74c25bSMi Jinlong 199155c760cfSJ. Bruce Fields static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs *ca, struct nfsd_net *nn) 19921b74c25bSMi Jinlong { 199355c760cfSJ. Bruce Fields u32 maxrpc = nn->nfsd_serv->sv_max_mesg; 199455c760cfSJ. Bruce Fields 1995373cd409SJ. Bruce Fields if (ca->maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ) 1996373cd409SJ. Bruce Fields return nfserr_toosmall; 1997373cd409SJ. Bruce Fields if (ca->maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ) 1998373cd409SJ. Bruce Fields return nfserr_toosmall; 199955c760cfSJ. Bruce Fields ca->headerpadsz = 0; 200055c760cfSJ. Bruce Fields ca->maxreq_sz = min_t(u32, ca->maxreq_sz, maxrpc); 200155c760cfSJ. Bruce Fields ca->maxresp_sz = min_t(u32, ca->maxresp_sz, maxrpc); 200255c760cfSJ. Bruce Fields ca->maxops = min_t(u32, ca->maxops, NFSD_MAX_OPS_PER_COMPOUND); 200355c760cfSJ. Bruce Fields ca->maxresp_cached = min_t(u32, ca->maxresp_cached, 200455c760cfSJ. Bruce Fields NFSD_SLOT_CACHE_SIZE + NFSD_MIN_HDR_SEQ_SZ); 200555c760cfSJ. Bruce Fields ca->maxreqs = min_t(u32, ca->maxreqs, NFSD_MAX_SLOTS_PER_SESSION); 200655c760cfSJ. Bruce Fields /* 200755c760cfSJ. Bruce Fields * Note decreasing slot size below client's request may make it 200855c760cfSJ. Bruce Fields * difficult for client to function correctly, whereas 200955c760cfSJ. Bruce Fields * decreasing the number of slots will (just?) affect 201055c760cfSJ. Bruce Fields * performance. When short on memory we therefore prefer to 201155c760cfSJ. Bruce Fields * decrease number of slots instead of their size. Clients that 201255c760cfSJ. Bruce Fields * request larger slots than they need will get poor results: 201355c760cfSJ. Bruce Fields */ 201455c760cfSJ. Bruce Fields ca->maxreqs = nfsd4_get_drc_mem(ca); 201555c760cfSJ. Bruce Fields if (!ca->maxreqs) 201655c760cfSJ. Bruce Fields return nfserr_jukebox; 201755c760cfSJ. Bruce Fields 2018373cd409SJ. Bruce Fields return nfs_ok; 20191b74c25bSMi Jinlong } 20201b74c25bSMi Jinlong 20218a891633SKinglong Mee #define NFSD_CB_MAX_REQ_SZ ((NFS4_enc_cb_recall_sz + \ 20228a891633SKinglong Mee RPC_MAX_HEADER_WITH_AUTH) * sizeof(__be32)) 20238a891633SKinglong Mee #define NFSD_CB_MAX_RESP_SZ ((NFS4_dec_cb_recall_sz + \ 20248a891633SKinglong Mee RPC_MAX_REPHEADER_WITH_AUTH) * sizeof(__be32)) 20258a891633SKinglong Mee 202606b332a5SJ. Bruce Fields static __be32 check_backchannel_attrs(struct nfsd4_channel_attrs *ca) 202706b332a5SJ. Bruce Fields { 202806b332a5SJ. Bruce Fields ca->headerpadsz = 0; 202906b332a5SJ. Bruce Fields 203006b332a5SJ. Bruce Fields /* 203106b332a5SJ. Bruce Fields * These RPC_MAX_HEADER macros are overkill, especially since we 203206b332a5SJ. Bruce Fields * don't even do gss on the backchannel yet. But this is still 203306b332a5SJ. Bruce Fields * less than 1k. Tighten up this estimate in the unlikely event 203406b332a5SJ. Bruce Fields * it turns out to be a problem for some client: 203506b332a5SJ. Bruce Fields */ 20368a891633SKinglong Mee if (ca->maxreq_sz < NFSD_CB_MAX_REQ_SZ) 203706b332a5SJ. Bruce Fields return nfserr_toosmall; 20388a891633SKinglong Mee if (ca->maxresp_sz < NFSD_CB_MAX_RESP_SZ) 203906b332a5SJ. Bruce Fields return nfserr_toosmall; 204006b332a5SJ. Bruce Fields ca->maxresp_cached = 0; 204106b332a5SJ. Bruce Fields if (ca->maxops < 2) 204206b332a5SJ. Bruce Fields return nfserr_toosmall; 204306b332a5SJ. Bruce Fields 204406b332a5SJ. Bruce Fields return nfs_ok; 2045069b6ad4SAndy Adamson } 2046069b6ad4SAndy Adamson 2047b78724b7SJ. Bruce Fields static __be32 nfsd4_check_cb_sec(struct nfsd4_cb_sec *cbs) 2048b78724b7SJ. Bruce Fields { 2049b78724b7SJ. Bruce Fields switch (cbs->flavor) { 2050b78724b7SJ. Bruce Fields case RPC_AUTH_NULL: 2051b78724b7SJ. Bruce Fields case RPC_AUTH_UNIX: 2052b78724b7SJ. Bruce Fields return nfs_ok; 2053b78724b7SJ. Bruce Fields default: 2054b78724b7SJ. Bruce Fields /* 2055b78724b7SJ. Bruce Fields * GSS case: the spec doesn't allow us to return this 2056b78724b7SJ. Bruce Fields * error. But it also doesn't allow us not to support 2057b78724b7SJ. Bruce Fields * GSS. 2058b78724b7SJ. Bruce Fields * I'd rather this fail hard than return some error the 2059b78724b7SJ. Bruce Fields * client might think it can already handle: 2060b78724b7SJ. Bruce Fields */ 2061b78724b7SJ. Bruce Fields return nfserr_encr_alg_unsupp; 2062b78724b7SJ. Bruce Fields } 2063b78724b7SJ. Bruce Fields } 2064b78724b7SJ. Bruce Fields 2065069b6ad4SAndy Adamson __be32 2066069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 2067069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2068069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 2069069b6ad4SAndy Adamson { 2070363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 2071ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 2072ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 207381f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 207449557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 207557b7b43bSJ. Bruce Fields __be32 status = 0; 20768daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2077ec6b5d7bSAndy Adamson 2078a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 2079a62573dcSMi Jinlong return nfserr_inval; 2080b78724b7SJ. Bruce Fields status = nfsd4_check_cb_sec(&cr_ses->cb_sec); 2081b78724b7SJ. Bruce Fields if (status) 2082b78724b7SJ. Bruce Fields return status; 208355c760cfSJ. Bruce Fields status = check_forechannel_attrs(&cr_ses->fore_channel, nn); 2084373cd409SJ. Bruce Fields if (status) 2085373cd409SJ. Bruce Fields return status; 208606b332a5SJ. Bruce Fields status = check_backchannel_attrs(&cr_ses->back_channel); 208706b332a5SJ. Bruce Fields if (status) 2088f403e450SKinglong Mee goto out_release_drc_mem; 208981f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 209060810e54SKinglong Mee new = alloc_session(&cr_ses->fore_channel, &cr_ses->back_channel); 209155c760cfSJ. Bruce Fields if (!new) 209255c760cfSJ. Bruce Fields goto out_release_drc_mem; 209381f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 209481f0b2a4SJ. Bruce Fields if (!conn) 209581f0b2a4SJ. Bruce Fields goto out_free_session; 2096a62573dcSMi Jinlong 2097ec6b5d7bSAndy Adamson nfs4_lock_state(); 20980a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); 20998daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&cr_ses->clientid, true, nn); 210078389046SJ. Bruce Fields WARN_ON_ONCE(conf && unconf); 2101ec6b5d7bSAndy Adamson 2102ec6b5d7bSAndy Adamson if (conf) { 210357266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 210457266a6eSJ. Bruce Fields if (!mach_creds_match(conf, rqstp)) 210557266a6eSJ. Bruce Fields goto out_free_conn; 210649557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 210749557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 210838eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 210949557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 211081f0b2a4SJ. Bruce Fields goto out_free_conn; 211149557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 2112ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 211381f0b2a4SJ. Bruce Fields goto out_free_conn; 2114ec6b5d7bSAndy Adamson } 2115ec6b5d7bSAndy Adamson } else if (unconf) { 21168f9d3d3bSJ. Bruce Fields struct nfs4_client *old; 2117ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 2118363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 2119ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 212081f0b2a4SJ. Bruce Fields goto out_free_conn; 2121ec6b5d7bSAndy Adamson } 212257266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 212357266a6eSJ. Bruce Fields if (!mach_creds_match(unconf, rqstp)) 212457266a6eSJ. Bruce Fields goto out_free_conn; 212549557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 212649557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 212738eb76a5SAndy Adamson if (status) { 212838eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 2129ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 213081f0b2a4SJ. Bruce Fields goto out_free_conn; 2131ec6b5d7bSAndy Adamson } 2132382a62e7SStanislav Kinsbursky old = find_confirmed_client_by_name(&unconf->cl_name, nn); 2133221a6876SJ. Bruce Fields if (old) { 2134221a6876SJ. Bruce Fields status = mark_client_expired(old); 2135221a6876SJ. Bruce Fields if (status) 2136221a6876SJ. Bruce Fields goto out_free_conn; 21378f9d3d3bSJ. Bruce Fields expire_client(old); 2138221a6876SJ. Bruce Fields } 21398f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 2140ec6b5d7bSAndy Adamson conf = unconf; 2141ec6b5d7bSAndy Adamson } else { 2142ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 214381f0b2a4SJ. Bruce Fields goto out_free_conn; 2144ec6b5d7bSAndy Adamson } 214581f0b2a4SJ. Bruce Fields status = nfs_ok; 21468323c3b2SJ. Bruce Fields /* 2147408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 2148408b79bcSJ. Bruce Fields */ 2149408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 2150408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 2151408b79bcSJ. Bruce Fields 215281f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 215381f0b2a4SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, new); 215481f0b2a4SJ. Bruce Fields 2155ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 2156ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 215786c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 215849557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 2159ec6b5d7bSAndy Adamson 216049557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 216149557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 2162ec6b5d7bSAndy Adamson nfs4_unlock_state(); 2163ec6b5d7bSAndy Adamson return status; 216481f0b2a4SJ. Bruce Fields out_free_conn: 2165266533c6SYanchuan Nian nfs4_unlock_state(); 216681f0b2a4SJ. Bruce Fields free_conn(conn); 216781f0b2a4SJ. Bruce Fields out_free_session: 216881f0b2a4SJ. Bruce Fields __free_session(new); 216955c760cfSJ. Bruce Fields out_release_drc_mem: 217055c760cfSJ. Bruce Fields nfsd4_put_drc_mem(&cr_ses->fore_channel); 21711ca50792SJ. Bruce Fields return status; 2172069b6ad4SAndy Adamson } 2173069b6ad4SAndy Adamson 21741d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 21751d1bc8f2SJ. Bruce Fields { 21761d1bc8f2SJ. Bruce Fields switch (*dir) { 21771d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 21781d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 21791d1bc8f2SJ. Bruce Fields return nfs_ok; 21801d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 21811d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 21821d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 21831d1bc8f2SJ. Bruce Fields return nfs_ok; 21841d1bc8f2SJ. Bruce Fields }; 21851d1bc8f2SJ. Bruce Fields return nfserr_inval; 21861d1bc8f2SJ. Bruce Fields } 21871d1bc8f2SJ. Bruce Fields 2188cb73a9f4SJ. Bruce Fields __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) 2189cb73a9f4SJ. Bruce Fields { 2190cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 2191c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2192b78724b7SJ. Bruce Fields __be32 status; 2193cb73a9f4SJ. Bruce Fields 2194b78724b7SJ. Bruce Fields status = nfsd4_check_cb_sec(&bc->bc_cb_sec); 2195b78724b7SJ. Bruce Fields if (status) 2196b78724b7SJ. Bruce Fields return status; 2197c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2198cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 2199cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 2200c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 2201cb73a9f4SJ. Bruce Fields 2202cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 2203cb73a9f4SJ. Bruce Fields 2204cb73a9f4SJ. Bruce Fields return nfs_ok; 2205cb73a9f4SJ. Bruce Fields } 2206cb73a9f4SJ. Bruce Fields 22071d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 22081d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 22091d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 22101d1bc8f2SJ. Bruce Fields { 22111d1bc8f2SJ. Bruce Fields __be32 status; 22123ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 22134f6e6c17SJ. Bruce Fields struct nfsd4_session *session; 2214d4e19e70STrond Myklebust struct net *net = SVC_NET(rqstp); 2215d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 22161d1bc8f2SJ. Bruce Fields 22171d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 22181d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 22194f6e6c17SJ. Bruce Fields nfs4_lock_state(); 2220c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2221d4e19e70STrond Myklebust session = find_in_sessionid_hashtbl(&bcts->sessionid, net, &status); 2222c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 22234f6e6c17SJ. Bruce Fields if (!session) 2224d4e19e70STrond Myklebust goto out_no_session; 222557266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 222657266a6eSJ. Bruce Fields if (!mach_creds_match(session->se_client, rqstp)) 222757266a6eSJ. Bruce Fields goto out; 22281d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 22293ba63671SJ. Bruce Fields if (status) 22304f6e6c17SJ. Bruce Fields goto out; 22313ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 22324f6e6c17SJ. Bruce Fields status = nfserr_jukebox; 22333ba63671SJ. Bruce Fields if (!conn) 22344f6e6c17SJ. Bruce Fields goto out; 22354f6e6c17SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, session); 22364f6e6c17SJ. Bruce Fields status = nfs_ok; 22374f6e6c17SJ. Bruce Fields out: 2238d4e19e70STrond Myklebust nfsd4_put_session(session); 2239d4e19e70STrond Myklebust out_no_session: 22404f6e6c17SJ. Bruce Fields nfs4_unlock_state(); 22414f6e6c17SJ. Bruce Fields return status; 22421d1bc8f2SJ. Bruce Fields } 22431d1bc8f2SJ. Bruce Fields 22445d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 22455d4cec2fSJ. Bruce Fields { 22465d4cec2fSJ. Bruce Fields if (!session) 22475d4cec2fSJ. Bruce Fields return 0; 22485d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 22495d4cec2fSJ. Bruce Fields } 22505d4cec2fSJ. Bruce Fields 2251069b6ad4SAndy Adamson __be32 2252069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 2253069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2254069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 2255069b6ad4SAndy Adamson { 2256e10e0cfcSBenny Halevy struct nfsd4_session *ses; 2257abcdff09SJ. Bruce Fields __be32 status; 2258f0f51f5cSJ. Bruce Fields int ref_held_by_me = 0; 2259d4e19e70STrond Myklebust struct net *net = SVC_NET(r); 2260d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 2261e10e0cfcSBenny Halevy 2262abcdff09SJ. Bruce Fields nfs4_lock_state(); 2263abcdff09SJ. Bruce Fields status = nfserr_not_only_op; 22645d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 226557716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 2266abcdff09SJ. Bruce Fields goto out; 2267f0f51f5cSJ. Bruce Fields ref_held_by_me++; 226857716355SJ. Bruce Fields } 2269e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 2270c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2271d4e19e70STrond Myklebust ses = find_in_sessionid_hashtbl(&sessionid->sessionid, net, &status); 2272abcdff09SJ. Bruce Fields if (!ses) 2273abcdff09SJ. Bruce Fields goto out_client_lock; 227457266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 227557266a6eSJ. Bruce Fields if (!mach_creds_match(ses->se_client, r)) 2276d4e19e70STrond Myklebust goto out_put_session; 2277f0f51f5cSJ. Bruce Fields status = mark_session_dead_locked(ses, 1 + ref_held_by_me); 227866b2b9b2SJ. Bruce Fields if (status) 2279f0f51f5cSJ. Bruce Fields goto out_put_session; 2280e10e0cfcSBenny Halevy unhash_session(ses); 2281c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 2282e10e0cfcSBenny Halevy 228384f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 228419cf5c02SJ. Bruce Fields 2285c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2286e10e0cfcSBenny Halevy status = nfs_ok; 2287f0f51f5cSJ. Bruce Fields out_put_session: 2288d4e19e70STrond Myklebust nfsd4_put_session_locked(ses); 2289abcdff09SJ. Bruce Fields out_client_lock: 2290abcdff09SJ. Bruce Fields spin_unlock(&nn->client_lock); 2291e10e0cfcSBenny Halevy out: 2292abcdff09SJ. Bruce Fields nfs4_unlock_state(); 2293e10e0cfcSBenny Halevy return status; 2294069b6ad4SAndy Adamson } 2295069b6ad4SAndy Adamson 2296a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 2297328ead28SJ. Bruce Fields { 2298328ead28SJ. Bruce Fields struct nfsd4_conn *c; 2299328ead28SJ. Bruce Fields 2300328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 2301a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 2302328ead28SJ. Bruce Fields return c; 2303328ead28SJ. Bruce Fields } 2304328ead28SJ. Bruce Fields } 2305328ead28SJ. Bruce Fields return NULL; 2306328ead28SJ. Bruce Fields } 2307328ead28SJ. Bruce Fields 230857266a6eSJ. Bruce Fields static __be32 nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 2309328ead28SJ. Bruce Fields { 2310328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 2311a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 231257266a6eSJ. Bruce Fields __be32 status = nfs_ok; 231321b75b01SJ. Bruce Fields int ret; 2314328ead28SJ. Bruce Fields 2315328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 2316a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 231757266a6eSJ. Bruce Fields if (c) 231857266a6eSJ. Bruce Fields goto out_free; 231957266a6eSJ. Bruce Fields status = nfserr_conn_not_bound_to_session; 232057266a6eSJ. Bruce Fields if (clp->cl_mach_cred) 232157266a6eSJ. Bruce Fields goto out_free; 2322328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 2323328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 232421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 232521b75b01SJ. Bruce Fields if (ret) 232621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 232721b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 232857266a6eSJ. Bruce Fields return nfs_ok; 232957266a6eSJ. Bruce Fields out_free: 233057266a6eSJ. Bruce Fields spin_unlock(&clp->cl_lock); 233157266a6eSJ. Bruce Fields free_conn(new); 233257266a6eSJ. Bruce Fields return status; 2333328ead28SJ. Bruce Fields } 2334328ead28SJ. Bruce Fields 2335868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 2336868b89c3SMi Jinlong { 2337868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 2338868b89c3SMi Jinlong 2339868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 2340868b89c3SMi Jinlong } 2341868b89c3SMi Jinlong 2342ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 2343ae82a8d0SMi Jinlong struct nfsd4_session *session) 2344ae82a8d0SMi Jinlong { 2345ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 2346ae82a8d0SMi Jinlong 2347ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 2348ae82a8d0SMi Jinlong } 2349ae82a8d0SMi Jinlong 2350069b6ad4SAndy Adamson __be32 2351b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 2352069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2353069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 2354069b6ad4SAndy Adamson { 2355f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 235647ee5298SJ. Bruce Fields struct xdr_stream *xdr = &resp->xdr; 2357b85d4c01SBenny Halevy struct nfsd4_session *session; 2358221a6876SJ. Bruce Fields struct nfs4_client *clp; 2359b85d4c01SBenny Halevy struct nfsd4_slot *slot; 2360a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 236157b7b43bSJ. Bruce Fields __be32 status; 236247ee5298SJ. Bruce Fields int buflen; 2363d4e19e70STrond Myklebust struct net *net = SVC_NET(rqstp); 2364d4e19e70STrond Myklebust struct nfsd_net *nn = net_generic(net, nfsd_net_id); 2365b85d4c01SBenny Halevy 2366f9bb94c4SAndy Adamson if (resp->opcnt != 1) 2367f9bb94c4SAndy Adamson return nfserr_sequence_pos; 2368f9bb94c4SAndy Adamson 2369a663bdd8SJ. Bruce Fields /* 2370a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 2371a663bdd8SJ. Bruce Fields * below. 2372a663bdd8SJ. Bruce Fields */ 2373a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 2374a663bdd8SJ. Bruce Fields if (!conn) 2375a663bdd8SJ. Bruce Fields return nfserr_jukebox; 2376a663bdd8SJ. Bruce Fields 2377c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2378d4e19e70STrond Myklebust session = find_in_sessionid_hashtbl(&seq->sessionid, net, &status); 2379b85d4c01SBenny Halevy if (!session) 2380221a6876SJ. Bruce Fields goto out_no_session; 2381221a6876SJ. Bruce Fields clp = session->se_client; 2382b85d4c01SBenny Halevy 2383868b89c3SMi Jinlong status = nfserr_too_many_ops; 2384868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 238566b2b9b2SJ. Bruce Fields goto out_put_session; 2386868b89c3SMi Jinlong 2387ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2388ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 238966b2b9b2SJ. Bruce Fields goto out_put_session; 2390ae82a8d0SMi Jinlong 2391b85d4c01SBenny Halevy status = nfserr_badslot; 23926c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 239366b2b9b2SJ. Bruce Fields goto out_put_session; 2394b85d4c01SBenny Halevy 2395557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2396b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2397b85d4c01SBenny Halevy 2398a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2399a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2400a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2401a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2402a8dfdaebSAndy Adamson 240373e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 240473e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2405b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2406bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2407bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 240866b2b9b2SJ. Bruce Fields goto out_put_session; 2409b85d4c01SBenny Halevy cstate->slot = slot; 2410b85d4c01SBenny Halevy cstate->session = session; 24114b24ca7dSJeff Layton cstate->clp = clp; 2412da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2413557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2414bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2415da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2416aaf84eb9SBenny Halevy goto out; 2417b85d4c01SBenny Halevy } 2418b85d4c01SBenny Halevy if (status) 241966b2b9b2SJ. Bruce Fields goto out_put_session; 2420b85d4c01SBenny Halevy 242157266a6eSJ. Bruce Fields status = nfsd4_sequence_check_conn(conn, session); 2422a663bdd8SJ. Bruce Fields conn = NULL; 242357266a6eSJ. Bruce Fields if (status) 242457266a6eSJ. Bruce Fields goto out_put_session; 2425328ead28SJ. Bruce Fields 242647ee5298SJ. Bruce Fields buflen = (seq->cachethis) ? 242747ee5298SJ. Bruce Fields session->se_fchannel.maxresp_cached : 242847ee5298SJ. Bruce Fields session->se_fchannel.maxresp_sz; 242947ee5298SJ. Bruce Fields status = (seq->cachethis) ? nfserr_rep_too_big_to_cache : 243047ee5298SJ. Bruce Fields nfserr_rep_too_big; 2431a5cddc88SJ. Bruce Fields if (xdr_restrict_buflen(xdr, buflen - rqstp->rq_auth_slack)) 243247ee5298SJ. Bruce Fields goto out_put_session; 243332aaa62eSJ. Bruce Fields svc_reserve(rqstp, buflen); 243447ee5298SJ. Bruce Fields 243547ee5298SJ. Bruce Fields status = nfs_ok; 2436b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2437b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2438bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 243973e79482SJ. Bruce Fields if (seq->cachethis) 244073e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2441bf5c43c8SJ. Bruce Fields else 2442bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2443b85d4c01SBenny Halevy 2444b85d4c01SBenny Halevy cstate->slot = slot; 2445b85d4c01SBenny Halevy cstate->session = session; 24464b24ca7dSJeff Layton cstate->clp = clp; 2447b85d4c01SBenny Halevy 2448b85d4c01SBenny Halevy out: 24495423732aSBenny Halevy switch (clp->cl_cb_state) { 24505423732aSBenny Halevy case NFSD4_CB_DOWN: 2451fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 24525423732aSBenny Halevy break; 24535423732aSBenny Halevy case NFSD4_CB_FAULT: 2454fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 24555423732aSBenny Halevy break; 2456fc0c3dd1SBenny Halevy default: 2457fc0c3dd1SBenny Halevy seq->status_flags = 0; 24585423732aSBenny Halevy } 24593bd64a5bSJ. Bruce Fields if (!list_empty(&clp->cl_revoked)) 24603bd64a5bSJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_RECALLABLE_STATE_REVOKED; 2461221a6876SJ. Bruce Fields out_no_session: 24623f42d2c4SKinglong Mee if (conn) 24633f42d2c4SKinglong Mee free_conn(conn); 2464c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 2465b85d4c01SBenny Halevy return status; 246666b2b9b2SJ. Bruce Fields out_put_session: 2467d4e19e70STrond Myklebust nfsd4_put_session_locked(session); 2468221a6876SJ. Bruce Fields goto out_no_session; 2469069b6ad4SAndy Adamson } 2470069b6ad4SAndy Adamson 2471b607664eSTrond Myklebust void 2472b607664eSTrond Myklebust nfsd4_sequence_done(struct nfsd4_compoundres *resp) 2473b607664eSTrond Myklebust { 2474b607664eSTrond Myklebust struct nfsd4_compound_state *cs = &resp->cstate; 2475b607664eSTrond Myklebust 2476b607664eSTrond Myklebust if (nfsd4_has_session(cs)) { 2477b607664eSTrond Myklebust if (cs->status != nfserr_replay_cache) { 2478b607664eSTrond Myklebust nfsd4_store_cache_entry(resp); 2479b607664eSTrond Myklebust cs->slot->sl_flags &= ~NFSD4_SLOT_INUSE; 2480b607664eSTrond Myklebust } 2481d4e19e70STrond Myklebust /* Drop session reference that was taken in nfsd4_sequence() */ 2482b607664eSTrond Myklebust nfsd4_put_session(cs->session); 24834b24ca7dSJeff Layton } else if (cs->clp) 24844b24ca7dSJeff Layton put_client_renew(cs->clp); 2485b607664eSTrond Myklebust } 2486b607664eSTrond Myklebust 2487345c2842SMi Jinlong __be32 2488345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2489345c2842SMi Jinlong { 2490345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 249157b7b43bSJ. Bruce Fields __be32 status = 0; 24928daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2493345c2842SMi Jinlong 2494345c2842SMi Jinlong nfs4_lock_state(); 24950a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&dc->clientid, true, nn); 24968daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&dc->clientid, true, nn); 249778389046SJ. Bruce Fields WARN_ON_ONCE(conf && unconf); 2498345c2842SMi Jinlong 2499345c2842SMi Jinlong if (conf) { 2500345c2842SMi Jinlong clp = conf; 2501345c2842SMi Jinlong 2502c0293b01SJ. Bruce Fields if (client_has_state(conf)) { 2503345c2842SMi Jinlong status = nfserr_clientid_busy; 2504345c2842SMi Jinlong goto out; 2505345c2842SMi Jinlong } 2506345c2842SMi Jinlong } else if (unconf) 2507345c2842SMi Jinlong clp = unconf; 2508345c2842SMi Jinlong else { 2509345c2842SMi Jinlong status = nfserr_stale_clientid; 2510345c2842SMi Jinlong goto out; 2511345c2842SMi Jinlong } 251257266a6eSJ. Bruce Fields if (!mach_creds_match(clp, rqstp)) { 251357266a6eSJ. Bruce Fields status = nfserr_wrong_cred; 251457266a6eSJ. Bruce Fields goto out; 251557266a6eSJ. Bruce Fields } 2516345c2842SMi Jinlong expire_client(clp); 2517345c2842SMi Jinlong out: 2518345c2842SMi Jinlong nfs4_unlock_state(); 2519345c2842SMi Jinlong return status; 2520345c2842SMi Jinlong } 2521345c2842SMi Jinlong 2522069b6ad4SAndy Adamson __be32 25234dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 25244dc6ec00SJ. Bruce Fields { 252557b7b43bSJ. Bruce Fields __be32 status = 0; 2526bcecf1ccSMi Jinlong 25274dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 25284dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 25294dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 25304dc6ec00SJ. Bruce Fields /* 25314dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 25324dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 25334dc6ec00SJ. Bruce Fields */ 25344dc6ec00SJ. Bruce Fields return nfs_ok; 25354dc6ec00SJ. Bruce Fields } 2536bcecf1ccSMi Jinlong 25374dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2538bcecf1ccSMi Jinlong status = nfserr_complete_already; 2539a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2540a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2541bcecf1ccSMi Jinlong goto out; 2542bcecf1ccSMi Jinlong 2543bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2544bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 25454dc6ec00SJ. Bruce Fields /* 25464dc6ec00SJ. Bruce Fields * The following error isn't really legal. 25474dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 25484dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 25494dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 25504dc6ec00SJ. Bruce Fields * client. 25514dc6ec00SJ. Bruce Fields */ 2552bcecf1ccSMi Jinlong goto out; 2553bcecf1ccSMi Jinlong 2554bcecf1ccSMi Jinlong status = nfs_ok; 25552a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2556bcecf1ccSMi Jinlong out: 25574dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2558bcecf1ccSMi Jinlong return status; 25594dc6ec00SJ. Bruce Fields } 25604dc6ec00SJ. Bruce Fields 25614dc6ec00SJ. Bruce Fields __be32 2562b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2563b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 25641da177e4SLinus Torvalds { 2565a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 25661da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 256728ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2568b37ad28bSAl Viro __be32 status; 2569c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2570a55370a3SNeilBrown 257163db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 25721da177e4SLinus Torvalds nfs4_lock_state(); 2573382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&clname, nn); 257428ce6054SNeilBrown if (conf) { 257563db4632SJ. Bruce Fields /* case 0: */ 25761da177e4SLinus Torvalds status = nfserr_clid_inuse; 2577e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2578e203d506SJ. Bruce Fields goto out; 2579026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2580363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2581363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2582363168b4SJeff Layton sizeof(addr_str)); 2583026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2584363168b4SJeff Layton "at %s\n", addr_str); 25851da177e4SLinus Torvalds goto out; 25861da177e4SLinus Torvalds } 25871da177e4SLinus Torvalds } 2588a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&clname, nn); 25891da177e4SLinus Torvalds if (unconf) 25901da177e4SLinus Torvalds expire_client(unconf); 25918f930711SJ. Bruce Fields status = nfserr_jukebox; 25922216d449SJeff Layton new = create_client(clname, rqstp, &clverifier); 2593a55370a3SNeilBrown if (new == NULL) 25941da177e4SLinus Torvalds goto out; 259534b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 259663db4632SJ. Bruce Fields /* case 1: probable callback update */ 25971da177e4SLinus Torvalds copy_clid(new, conf); 259834b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 2599c212cecfSStanislav Kinsbursky gen_clid(new, nn); 26008323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 26016f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2602ac55fdc4SJeff Layton add_to_unconfirmed(new); 26031da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 26041da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 26051da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 26061da177e4SLinus Torvalds status = nfs_ok; 26071da177e4SLinus Torvalds out: 26081da177e4SLinus Torvalds nfs4_unlock_state(); 26091da177e4SLinus Torvalds return status; 26101da177e4SLinus Torvalds } 26111da177e4SLinus Torvalds 26121da177e4SLinus Torvalds 2613b37ad28bSAl Viro __be32 2614b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2615b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2616b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 26171da177e4SLinus Torvalds { 261821ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 26191da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 26201da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2621b37ad28bSAl Viro __be32 status; 26227f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 26231da177e4SLinus Torvalds 26242c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 26251da177e4SLinus Torvalds return nfserr_stale_clientid; 26261da177e4SLinus Torvalds nfs4_lock_state(); 262721ab45a4SNeilBrown 26288daae4dcSStanislav Kinsbursky conf = find_confirmed_client(clid, false, nn); 26290a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(clid, false, nn); 2630a186e767SJ. Bruce Fields /* 26318695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 26328695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 26338695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 26348695b90aSJ. Bruce Fields * bug. 2635a186e767SJ. Bruce Fields */ 26368695b90aSJ. Bruce Fields status = nfserr_serverfault; 26378695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 26388695b90aSJ. Bruce Fields goto out; 26398695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 26408695b90aSJ. Bruce Fields goto out; 264163db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 264290d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 264390d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 264490d700b7SJ. Bruce Fields status = nfs_ok; 264590d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 264690d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 264790d700b7SJ. Bruce Fields goto out; 264890d700b7SJ. Bruce Fields } 264990d700b7SJ. Bruce Fields status = nfs_ok; 265090d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 26515a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 26525a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 26531a69c179SNeilBrown expire_client(unconf); 265490d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 2655382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&unconf->cl_name, nn); 2656221a6876SJ. Bruce Fields if (conf) { 2657221a6876SJ. Bruce Fields status = mark_client_expired(conf); 2658221a6876SJ. Bruce Fields if (status) 2659221a6876SJ. Bruce Fields goto out; 26601a69c179SNeilBrown expire_client(conf); 2661221a6876SJ. Bruce Fields } 26621da177e4SLinus Torvalds move_to_confirmed(unconf); 2663f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 266408e8987cSNeilBrown } 26651da177e4SLinus Torvalds out: 26661da177e4SLinus Torvalds nfs4_unlock_state(); 26671da177e4SLinus Torvalds return status; 26681da177e4SLinus Torvalds } 26691da177e4SLinus Torvalds 267032513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 26711da177e4SLinus Torvalds { 267232513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 267332513b40SJ. Bruce Fields } 267432513b40SJ. Bruce Fields 267532513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 267632513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 267732513b40SJ. Bruce Fields { 26781da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 26791da177e4SLinus Torvalds 2680950e0118STrond Myklebust lockdep_assert_held(&state_lock); 2681950e0118STrond Myklebust 26828b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 2683*1d31a253STrond Myklebust spin_lock_init(&fp->fi_lock); 26848beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 26858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 2686950e0118STrond Myklebust ihold(ino); 2687950e0118STrond Myklebust fp->fi_inode = ino; 268847f9940cSMeelap Shah fp->fi_had_conflict = false; 2689acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2690f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2691f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 269289876f8cSJeff Layton hlist_add_head(&fp->fi_hash, &file_hashtbl[hashval]); 26931da177e4SLinus Torvalds } 26941da177e4SLinus Torvalds 2695e8ff2a84SJ. Bruce Fields void 2696e60d4398SNeilBrown nfsd4_free_slabs(void) 2697e60d4398SNeilBrown { 2698abf1135bSChristoph Hellwig kmem_cache_destroy(openowner_slab); 2699abf1135bSChristoph Hellwig kmem_cache_destroy(lockowner_slab); 2700abf1135bSChristoph Hellwig kmem_cache_destroy(file_slab); 2701abf1135bSChristoph Hellwig kmem_cache_destroy(stateid_slab); 2702abf1135bSChristoph Hellwig kmem_cache_destroy(deleg_slab); 2703e60d4398SNeilBrown } 27041da177e4SLinus Torvalds 270572083396SBryan Schumaker int 27061da177e4SLinus Torvalds nfsd4_init_slabs(void) 27071da177e4SLinus Torvalds { 2708fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2709fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2710fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2711abf1135bSChristoph Hellwig goto out; 2712fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 27133c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 2714fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2715abf1135bSChristoph Hellwig goto out_free_openowner_slab; 2716e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 271720c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2718e60d4398SNeilBrown if (file_slab == NULL) 2719abf1135bSChristoph Hellwig goto out_free_lockowner_slab; 27205ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2721dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 27225ac049acSNeilBrown if (stateid_slab == NULL) 2723abf1135bSChristoph Hellwig goto out_free_file_slab; 27245b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 272520c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 27265b2d21c1SNeilBrown if (deleg_slab == NULL) 2727abf1135bSChristoph Hellwig goto out_free_stateid_slab; 2728e60d4398SNeilBrown return 0; 2729abf1135bSChristoph Hellwig 2730abf1135bSChristoph Hellwig out_free_stateid_slab: 2731abf1135bSChristoph Hellwig kmem_cache_destroy(stateid_slab); 2732abf1135bSChristoph Hellwig out_free_file_slab: 2733abf1135bSChristoph Hellwig kmem_cache_destroy(file_slab); 2734abf1135bSChristoph Hellwig out_free_lockowner_slab: 2735abf1135bSChristoph Hellwig kmem_cache_destroy(lockowner_slab); 2736abf1135bSChristoph Hellwig out_free_openowner_slab: 2737abf1135bSChristoph Hellwig kmem_cache_destroy(openowner_slab); 2738abf1135bSChristoph Hellwig out: 27391da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 27401da177e4SLinus Torvalds return -ENOMEM; 27411da177e4SLinus Torvalds } 27421da177e4SLinus Torvalds 2743ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2744ff194bd9SJ. Bruce Fields { 2745ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2746ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2747ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2748ff194bd9SJ. Bruce Fields } 2749ff194bd9SJ. Bruce Fields 2750fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 27511da177e4SLinus Torvalds { 27521da177e4SLinus Torvalds struct nfs4_stateowner *sop; 27531da177e4SLinus Torvalds 2754fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2755ff194bd9SJ. Bruce Fields if (!sop) 2756ff194bd9SJ. Bruce Fields return NULL; 2757ff194bd9SJ. Bruce Fields 2758ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2759ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2760fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2761ff194bd9SJ. Bruce Fields return NULL; 2762ff194bd9SJ. Bruce Fields } 27631da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2764ff194bd9SJ. Bruce Fields 2765ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2766ff194bd9SJ. Bruce Fields sop->so_client = clp; 2767ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 27681da177e4SLinus Torvalds return sop; 27691da177e4SLinus Torvalds } 2770ff194bd9SJ. Bruce Fields 2771fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2772ff194bd9SJ. Bruce Fields { 27739b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 27749b531137SStanislav Kinsbursky 27759b531137SStanislav Kinsbursky list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 2776fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 27771da177e4SLinus Torvalds } 27781da177e4SLinus Torvalds 2779fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 278013d6f66bSTrond Myklebust alloc_init_open_stateowner(unsigned int strhashval, struct nfsd4_open *open, 2781db24b3b4SJeff Layton struct nfsd4_compound_state *cstate) 2782db24b3b4SJeff Layton { 278313d6f66bSTrond Myklebust struct nfs4_client *clp = cstate->clp; 2784fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 27851da177e4SLinus Torvalds 2786fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2787fe0750e5SJ. Bruce Fields if (!oo) 27881da177e4SLinus Torvalds return NULL; 2789fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2790fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2791d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2792db24b3b4SJeff Layton if (nfsd4_has_session(cstate)) 2793db24b3b4SJeff Layton oo->oo_flags |= NFS4_OO_CONFIRMED; 2794fe0750e5SJ. Bruce Fields oo->oo_time = 0; 279538c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2796fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2797fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2798fe0750e5SJ. Bruce Fields return oo; 27991da177e4SLinus Torvalds } 28001da177e4SLinus Torvalds 2801996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2802fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 28031da177e4SLinus Torvalds 28043abdb607SJ. Bruce Fields stp->st_stid.sc_type = NFS4_OPEN_STID; 28053c87b9b7STrond Myklebust INIT_LIST_HEAD(&stp->st_locks); 2806fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 2807fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 280813cd2184SNeilBrown get_nfs4_file(fp); 28091da177e4SLinus Torvalds stp->st_file = fp; 28101da177e4SLinus Torvalds stp->st_access_bmap = 0; 28111da177e4SLinus Torvalds stp->st_deny_bmap = 0; 281282c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2813ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28144c4cd222SNeilBrown stp->st_openstp = NULL; 2815*1d31a253STrond Myklebust spin_lock(&fp->fi_lock); 2816*1d31a253STrond Myklebust list_add(&stp->st_perfile, &fp->fi_stateids); 2817*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 28181da177e4SLinus Torvalds } 28191da177e4SLinus Torvalds 28201da177e4SLinus Torvalds static void 282173758fedSStanislav Kinsbursky move_to_close_lru(struct nfs4_openowner *oo, struct net *net) 28221da177e4SLinus Torvalds { 282373758fedSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 282473758fedSStanislav Kinsbursky 2825fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 28261da177e4SLinus Torvalds 282773758fedSStanislav Kinsbursky list_move_tail(&oo->oo_close_lru, &nn->close_lru); 2828fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 28291da177e4SLinus Torvalds } 28301da177e4SLinus Torvalds 28311da177e4SLinus Torvalds static int 2832599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2833599e0a22SJ. Bruce Fields clientid_t *clid) 2834599e0a22SJ. Bruce Fields { 2835599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2836599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2837599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 28381da177e4SLinus Torvalds } 28391da177e4SLinus Torvalds 2840fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 28419b531137SStanislav Kinsbursky find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, 28429b531137SStanislav Kinsbursky bool sessions, struct nfsd_net *nn) 28431da177e4SLinus Torvalds { 2844a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2845a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 2846d15c077eSJ. Bruce Fields struct nfs4_client *clp; 28471da177e4SLinus Torvalds 28489b531137SStanislav Kinsbursky list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { 284916bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 285016bfdaafSJ. Bruce Fields continue; 2851a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2852a50d2ad1SJ. Bruce Fields oo = openowner(so); 2853d15c077eSJ. Bruce Fields clp = oo->oo_owner.so_client; 2854d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2855d15c077eSJ. Bruce Fields return NULL; 2856a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2857a50d2ad1SJ. Bruce Fields return oo; 2858a50d2ad1SJ. Bruce Fields } 28591da177e4SLinus Torvalds } 28601da177e4SLinus Torvalds return NULL; 28611da177e4SLinus Torvalds } 28621da177e4SLinus Torvalds 28631da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 28641da177e4SLinus Torvalds static struct nfs4_file * 2865950e0118STrond Myklebust find_file_locked(struct inode *ino) 28661da177e4SLinus Torvalds { 28671da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 28681da177e4SLinus Torvalds struct nfs4_file *fp; 28691da177e4SLinus Torvalds 2870950e0118STrond Myklebust lockdep_assert_held(&state_lock); 2871950e0118STrond Myklebust 287289876f8cSJeff Layton hlist_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 287313cd2184SNeilBrown if (fp->fi_inode == ino) { 287413cd2184SNeilBrown get_nfs4_file(fp); 28751da177e4SLinus Torvalds return fp; 28761da177e4SLinus Torvalds } 287713cd2184SNeilBrown } 28781da177e4SLinus Torvalds return NULL; 28791da177e4SLinus Torvalds } 28801da177e4SLinus Torvalds 2881950e0118STrond Myklebust static struct nfs4_file * 2882950e0118STrond Myklebust find_file(struct inode *ino) 2883950e0118STrond Myklebust { 2884950e0118STrond Myklebust struct nfs4_file *fp; 2885950e0118STrond Myklebust 2886950e0118STrond Myklebust spin_lock(&state_lock); 2887950e0118STrond Myklebust fp = find_file_locked(ino); 2888950e0118STrond Myklebust spin_unlock(&state_lock); 2889950e0118STrond Myklebust return fp; 2890950e0118STrond Myklebust } 2891950e0118STrond Myklebust 2892950e0118STrond Myklebust static struct nfs4_file * 2893950e0118STrond Myklebust find_or_add_file(struct inode *ino, struct nfs4_file *new) 2894950e0118STrond Myklebust { 2895950e0118STrond Myklebust struct nfs4_file *fp; 2896950e0118STrond Myklebust 2897950e0118STrond Myklebust spin_lock(&state_lock); 2898950e0118STrond Myklebust fp = find_file_locked(ino); 2899950e0118STrond Myklebust if (fp == NULL) { 2900950e0118STrond Myklebust nfsd4_init_file(new, ino); 2901950e0118STrond Myklebust fp = new; 2902950e0118STrond Myklebust } 2903950e0118STrond Myklebust spin_unlock(&state_lock); 2904950e0118STrond Myklebust 2905950e0118STrond Myklebust return fp; 2906950e0118STrond Myklebust } 2907950e0118STrond Myklebust 29084f83aa30SJ. Bruce Fields /* 29091da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 29101da177e4SLinus Torvalds * WRITE with all zero or all one stateid 29111da177e4SLinus Torvalds */ 2912b37ad28bSAl Viro static __be32 29131da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 29141da177e4SLinus Torvalds { 29151da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 29161da177e4SLinus Torvalds struct nfs4_file *fp; 2917dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2918b37ad28bSAl Viro __be32 ret; 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds fp = find_file(ino); 292113cd2184SNeilBrown if (!fp) 292213cd2184SNeilBrown return nfs_ok; 2923b700949bSNeilBrown ret = nfserr_locked; 29241da177e4SLinus Torvalds /* Search for conflicting share reservations */ 2925*1d31a253STrond Myklebust spin_lock(&fp->fi_lock); 29268beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2927ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2928ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 292913cd2184SNeilBrown goto out; 29301da177e4SLinus Torvalds } 293113cd2184SNeilBrown ret = nfs_ok; 293213cd2184SNeilBrown out: 2933*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 293413cd2184SNeilBrown put_nfs4_file(fp); 293513cd2184SNeilBrown return ret; 29361da177e4SLinus Torvalds } 29371da177e4SLinus Torvalds 29386b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 29391da177e4SLinus Torvalds { 2940e8c69d17SJ. Bruce Fields struct nfs4_client *clp = dp->dl_stid.sc_client; 2941e8c69d17SJ. Bruce Fields struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 2942e8c69d17SJ. Bruce Fields 2943cdc97505SBenny Halevy lockdep_assert_held(&state_lock); 29441da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 29451da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 29461da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 29471da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 29481da177e4SLinus Torvalds * it's safe to take a reference: */ 29491da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 29501da177e4SLinus Torvalds 2951dff1399fSJeff Layton /* 2952dff1399fSJeff Layton * If the dl_time != 0, then we know that it has already been 2953dff1399fSJeff Layton * queued for a lease break. Don't queue it again. 2954dff1399fSJeff Layton */ 2955dff1399fSJeff Layton if (dp->dl_time == 0) { 2956e8c69d17SJ. Bruce Fields list_add_tail(&dp->dl_recall_lru, &nn->del_recall_lru); 29571da177e4SLinus Torvalds dp->dl_time = get_seconds(); 2958dff1399fSJeff Layton } 29591da177e4SLinus Torvalds 29606282cd56SNeilBrown block_delegations(&dp->dl_fh); 29616282cd56SNeilBrown 29626b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 29636b57d9c8SJ. Bruce Fields } 29646b57d9c8SJ. Bruce Fields 29651c8c601aSJeff Layton /* Called from break_lease() with i_lock held. */ 29666b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 29676b57d9c8SJ. Bruce Fields { 2968acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2969acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 29706b57d9c8SJ. Bruce Fields 29717fa10cd1SJ. Bruce Fields if (!fp) { 29727fa10cd1SJ. Bruce Fields WARN(1, "(%p)->fl_owner NULL\n", fl); 29737fa10cd1SJ. Bruce Fields return; 29747fa10cd1SJ. Bruce Fields } 29757fa10cd1SJ. Bruce Fields if (fp->fi_had_conflict) { 29767fa10cd1SJ. Bruce Fields WARN(1, "duplicate break on %p\n", fp); 29777fa10cd1SJ. Bruce Fields return; 29787fa10cd1SJ. Bruce Fields } 29790272e1fdSJ. Bruce Fields /* 29800272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2981acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 29826b57d9c8SJ. Bruce Fields * in time: 29830272e1fdSJ. Bruce Fields */ 29840272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 29851da177e4SLinus Torvalds 2986cdc97505SBenny Halevy spin_lock(&state_lock); 2987acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2988acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 29895d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 2990cdc97505SBenny Halevy spin_unlock(&state_lock); 29911da177e4SLinus Torvalds } 29921da177e4SLinus Torvalds 29931da177e4SLinus Torvalds static 29941da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 29951da177e4SLinus Torvalds { 29961da177e4SLinus Torvalds if (arg & F_UNLCK) 29971da177e4SLinus Torvalds return lease_modify(onlist, arg); 29981da177e4SLinus Torvalds else 29991da177e4SLinus Torvalds return -EAGAIN; 30001da177e4SLinus Torvalds } 30011da177e4SLinus Torvalds 30027b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 30038fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 30048fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 30051da177e4SLinus Torvalds }; 30061da177e4SLinus Torvalds 30077a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 30087a8711c9SJ. Bruce Fields { 30097a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 30107a8711c9SJ. Bruce Fields return nfs_ok; 30117a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 30127a8711c9SJ. Bruce Fields return nfserr_replay_me; 30137a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 30147a8711c9SJ. Bruce Fields return nfs_ok; 30157a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 30167a8711c9SJ. Bruce Fields } 30171da177e4SLinus Torvalds 30184b24ca7dSJeff Layton static __be32 lookup_clientid(clientid_t *clid, 30194b24ca7dSJeff Layton struct nfsd4_compound_state *cstate, 30204b24ca7dSJeff Layton struct nfsd_net *nn) 30214b24ca7dSJeff Layton { 30224b24ca7dSJeff Layton struct nfs4_client *found; 30234b24ca7dSJeff Layton 30244b24ca7dSJeff Layton if (cstate->clp) { 30254b24ca7dSJeff Layton found = cstate->clp; 30264b24ca7dSJeff Layton if (!same_clid(&found->cl_clientid, clid)) 30274b24ca7dSJeff Layton return nfserr_stale_clientid; 30284b24ca7dSJeff Layton return nfs_ok; 30294b24ca7dSJeff Layton } 30304b24ca7dSJeff Layton 30314b24ca7dSJeff Layton if (STALE_CLIENTID(clid, nn)) 30324b24ca7dSJeff Layton return nfserr_stale_clientid; 30334b24ca7dSJeff Layton 30344b24ca7dSJeff Layton /* 30354b24ca7dSJeff Layton * For v4.1+ we get the client in the SEQUENCE op. If we don't have one 30364b24ca7dSJeff Layton * cached already then we know this is for is for v4.0 and "sessions" 30374b24ca7dSJeff Layton * will be false. 30384b24ca7dSJeff Layton */ 30394b24ca7dSJeff Layton WARN_ON_ONCE(cstate->session); 30404b24ca7dSJeff Layton found = find_confirmed_client(clid, false, nn); 30414b24ca7dSJeff Layton if (!found) 30424b24ca7dSJeff Layton return nfserr_expired; 30434b24ca7dSJeff Layton 30444b24ca7dSJeff Layton /* Cache the nfs4_client in cstate! */ 30454b24ca7dSJeff Layton cstate->clp = found; 30464b24ca7dSJeff Layton atomic_inc(&found->cl_refcount); 30474b24ca7dSJeff Layton return nfs_ok; 30484b24ca7dSJeff Layton } 30494b24ca7dSJeff Layton 3050b37ad28bSAl Viro __be32 30516668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 30523320fef1SStanislav Kinsbursky struct nfsd4_open *open, struct nfsd_net *nn) 30531da177e4SLinus Torvalds { 30541da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 30551da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 30561da177e4SLinus Torvalds unsigned int strhashval; 3057fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 30584cdc951bSJ. Bruce Fields __be32 status; 30591da177e4SLinus Torvalds 30602c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 30611da177e4SLinus Torvalds return nfserr_stale_clientid; 306232513b40SJ. Bruce Fields /* 306332513b40SJ. Bruce Fields * In case we need it later, after we've already created the 306432513b40SJ. Bruce Fields * file and don't want to risk a further failure: 306532513b40SJ. Bruce Fields */ 306632513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 306732513b40SJ. Bruce Fields if (open->op_file == NULL) 306832513b40SJ. Bruce Fields return nfserr_jukebox; 30691da177e4SLinus Torvalds 307013d6f66bSTrond Myklebust status = lookup_clientid(clientid, cstate, nn); 307113d6f66bSTrond Myklebust if (status) 307213d6f66bSTrond Myklebust return status; 307313d6f66bSTrond Myklebust clp = cstate->clp; 30742d91e895STrond Myklebust 30752d91e895STrond Myklebust strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 30762d91e895STrond Myklebust oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); 30772d91e895STrond Myklebust open->op_openowner = oo; 30782d91e895STrond Myklebust if (!oo) { 3079bcf130f9SJ. Bruce Fields goto new_owner; 30800f442aa2SJ. Bruce Fields } 3081dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 30820f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 3083fe0750e5SJ. Bruce Fields release_openowner(oo); 3084fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 3085bcf130f9SJ. Bruce Fields goto new_owner; 30860f442aa2SJ. Bruce Fields } 30874cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 30884cdc951bSJ. Bruce Fields if (status) 30894cdc951bSJ. Bruce Fields return status; 30904cdc951bSJ. Bruce Fields goto alloc_stateid; 3091bcf130f9SJ. Bruce Fields new_owner: 309213d6f66bSTrond Myklebust oo = alloc_init_open_stateowner(strhashval, open, cstate); 3093fe0750e5SJ. Bruce Fields if (oo == NULL) 30943e772463SJ. Bruce Fields return nfserr_jukebox; 3095fe0750e5SJ. Bruce Fields open->op_openowner = oo; 30964cdc951bSJ. Bruce Fields alloc_stateid: 30974cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 30984cdc951bSJ. Bruce Fields if (!open->op_stp) 30994cdc951bSJ. Bruce Fields return nfserr_jukebox; 31000f442aa2SJ. Bruce Fields return nfs_ok; 31011da177e4SLinus Torvalds } 31021da177e4SLinus Torvalds 3103b37ad28bSAl Viro static inline __be32 31044a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 31054a6e43e6SNeilBrown { 31064a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 31074a6e43e6SNeilBrown return nfserr_openmode; 31084a6e43e6SNeilBrown else 31094a6e43e6SNeilBrown return nfs_ok; 31104a6e43e6SNeilBrown } 31114a6e43e6SNeilBrown 3112c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 311324a0111eSJ. Bruce Fields { 311424a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 311524a0111eSJ. Bruce Fields } 311624a0111eSJ. Bruce Fields 311738c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 3118f459e453SJ. Bruce Fields { 3119f459e453SJ. Bruce Fields struct nfs4_stid *ret; 3120f459e453SJ. Bruce Fields 312138c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 3122f459e453SJ. Bruce Fields if (!ret) 3123f459e453SJ. Bruce Fields return NULL; 3124f459e453SJ. Bruce Fields return delegstateid(ret); 3125f459e453SJ. Bruce Fields } 3126f459e453SJ. Bruce Fields 31278b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 31288b289b2cSJ. Bruce Fields { 31298b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 31308b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 31318b289b2cSJ. Bruce Fields } 31328b289b2cSJ. Bruce Fields 3133b37ad28bSAl Viro static __be32 313441d22663SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfsd4_open *open, 3135567d9829SNeilBrown struct nfs4_delegation **dp) 3136567d9829SNeilBrown { 3137567d9829SNeilBrown int flags; 3138b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 3139567d9829SNeilBrown 314038c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 3141567d9829SNeilBrown if (*dp == NULL) 3142c44c5eebSNeilBrown goto out; 314324a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 3144567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 3145567d9829SNeilBrown if (status) 3146567d9829SNeilBrown *dp = NULL; 3147c44c5eebSNeilBrown out: 31488b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 3149c44c5eebSNeilBrown return nfs_ok; 3150c44c5eebSNeilBrown if (status) 3151c44c5eebSNeilBrown return status; 3152dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 3153c44c5eebSNeilBrown return nfs_ok; 3154567d9829SNeilBrown } 3155567d9829SNeilBrown 3156b37ad28bSAl Viro static __be32 3157dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 31581da177e4SLinus Torvalds { 3159dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 3160fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 31611da177e4SLinus Torvalds 3162*1d31a253STrond Myklebust spin_lock(&fp->fi_lock); 31638beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 31641da177e4SLinus Torvalds /* ignore lock owners */ 31651da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 31661da177e4SLinus Torvalds continue; 31671da177e4SLinus Torvalds /* remember if we have seen this open owner */ 3168fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 31691da177e4SLinus Torvalds *stpp = local; 31701da177e4SLinus Torvalds /* check for conflicting share reservations */ 3171*1d31a253STrond Myklebust if (!test_share(local, open)) { 3172*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 317377eaae8dSJ. Bruce Fields return nfserr_share_denied; 31741da177e4SLinus Torvalds } 3175*1d31a253STrond Myklebust } 3176*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 317777eaae8dSJ. Bruce Fields return nfs_ok; 31781da177e4SLinus Torvalds } 31791da177e4SLinus Torvalds 318021fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 318121fb4016SJ. Bruce Fields { 318221fb4016SJ. Bruce Fields int flags = 0; 318321fb4016SJ. Bruce Fields 318421fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 318521fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 318621fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 318721fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 318821fb4016SJ. Bruce Fields return flags; 318921fb4016SJ. Bruce Fields } 319021fb4016SJ. Bruce Fields 3191b37ad28bSAl Viro static inline __be32 31921da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 31931da177e4SLinus Torvalds struct nfsd4_open *open) 31941da177e4SLinus Torvalds { 31951da177e4SLinus Torvalds struct iattr iattr = { 31961da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 31971da177e4SLinus Torvalds .ia_size = 0, 31981da177e4SLinus Torvalds }; 31991da177e4SLinus Torvalds if (!open->op_truncate) 32001da177e4SLinus Torvalds return 0; 32011da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 32029246585aSAl Viro return nfserr_inval; 32031da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 32041da177e4SLinus Torvalds } 32051da177e4SLinus Torvalds 32067e6a72e5SChristoph Hellwig static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 32077e6a72e5SChristoph Hellwig struct svc_fh *cur_fh, struct nfsd4_open *open) 32087e6a72e5SChristoph Hellwig { 32097e6a72e5SChristoph Hellwig __be32 status; 32107e6a72e5SChristoph Hellwig int oflag = nfs4_access_to_omode(open->op_share_access); 32117e6a72e5SChristoph Hellwig int access = nfs4_access_to_access(open->op_share_access); 32127e6a72e5SChristoph Hellwig 32137e6a72e5SChristoph Hellwig if (!fp->fi_fds[oflag]) { 32147e6a72e5SChristoph Hellwig status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 32157e6a72e5SChristoph Hellwig &fp->fi_fds[oflag]); 32167e6a72e5SChristoph Hellwig if (status) 32177e6a72e5SChristoph Hellwig goto out; 32187e6a72e5SChristoph Hellwig } 32197e6a72e5SChristoph Hellwig nfs4_file_get_access(fp, oflag); 32207e6a72e5SChristoph Hellwig 32217e6a72e5SChristoph Hellwig status = nfsd4_truncate(rqstp, cur_fh, open); 32227e6a72e5SChristoph Hellwig if (status) 32237e6a72e5SChristoph Hellwig goto out_put_access; 32247e6a72e5SChristoph Hellwig 32257e6a72e5SChristoph Hellwig return nfs_ok; 32267e6a72e5SChristoph Hellwig 32277e6a72e5SChristoph Hellwig out_put_access: 32287e6a72e5SChristoph Hellwig nfs4_file_put_access(fp, oflag); 32297e6a72e5SChristoph Hellwig out: 32307e6a72e5SChristoph Hellwig return status; 32317e6a72e5SChristoph Hellwig } 32327e6a72e5SChristoph Hellwig 3233b37ad28bSAl Viro static __be32 3234dcef0413SJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_ol_stateid *stp, struct nfsd4_open *open) 32351da177e4SLinus Torvalds { 3236b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 3237b37ad28bSAl Viro __be32 status; 32381da177e4SLinus Torvalds 32397e6a72e5SChristoph Hellwig if (!test_access(op_share_access, stp)) 32400c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 32417e6a72e5SChristoph Hellwig else 32427e6a72e5SChristoph Hellwig status = nfsd4_truncate(rqstp, cur_fh, open); 32437e6a72e5SChristoph Hellwig 3244f9d7562fSJ. Bruce Fields if (status) 3245f9d7562fSJ. Bruce Fields return status; 32467e6a72e5SChristoph Hellwig 32471da177e4SLinus Torvalds /* remember the open */ 324882c5ff1bSJeff Layton set_access(op_share_access, stp); 3249ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 32501da177e4SLinus Torvalds return nfs_ok; 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds 32541da177e4SLinus Torvalds static void 32551255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 32561da177e4SLinus Torvalds { 3257dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 326014a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 326114a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 326214a24e99SJ. Bruce Fields { 326314a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 326414a24e99SJ. Bruce Fields return true; 326514a24e99SJ. Bruce Fields /* 326614a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 326714a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 326814a24e99SJ. Bruce Fields * until we hear otherwise: 326914a24e99SJ. Bruce Fields */ 327014a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 327114a24e99SJ. Bruce Fields } 327214a24e99SJ. Bruce Fields 327322d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 327422d38c4cSJ. Bruce Fields { 327522d38c4cSJ. Bruce Fields struct file_lock *fl; 327622d38c4cSJ. Bruce Fields 327722d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 327822d38c4cSJ. Bruce Fields if (!fl) 327922d38c4cSJ. Bruce Fields return NULL; 328022d38c4cSJ. Bruce Fields locks_init_lock(fl); 328122d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 3282617588d5SJ. Bruce Fields fl->fl_flags = FL_DELEG; 328322d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 328422d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 3285acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 328622d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 328722d38c4cSJ. Bruce Fields return fl; 328822d38c4cSJ. Bruce Fields } 328922d38c4cSJ. Bruce Fields 329099c41515SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp) 3291edab9782SJ. Bruce Fields { 3292acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 3293edab9782SJ. Bruce Fields struct file_lock *fl; 3294edab9782SJ. Bruce Fields int status; 3295edab9782SJ. Bruce Fields 329699c41515SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, NFS4_OPEN_DELEGATE_READ); 3297edab9782SJ. Bruce Fields if (!fl) 3298edab9782SJ. Bruce Fields return -ENOMEM; 3299acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 3300acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 3301e873088fSJ. Bruce Fields if (status) 3302e873088fSJ. Bruce Fields goto out_free; 3303acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 3304cb0942b8SAl Viro fp->fi_deleg_file = get_file(fl->fl_file); 3305acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 3306cdc97505SBenny Halevy spin_lock(&state_lock); 3307931ee56cSBenny Halevy hash_delegation_locked(dp, fp); 3308cdc97505SBenny Halevy spin_unlock(&state_lock); 3309acfdf5c3SJ. Bruce Fields return 0; 3310e873088fSJ. Bruce Fields out_free: 3311e873088fSJ. Bruce Fields locks_free_lock(fl); 3312e873088fSJ. Bruce Fields return status; 3313acfdf5c3SJ. Bruce Fields } 3314acfdf5c3SJ. Bruce Fields 3315bf7bd3e9SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, struct nfs4_file *fp) 3316acfdf5c3SJ. Bruce Fields { 3317bf7bd3e9SJ. Bruce Fields if (fp->fi_had_conflict) 3318bf7bd3e9SJ. Bruce Fields return -EAGAIN; 3319bf7bd3e9SJ. Bruce Fields get_nfs4_file(fp); 3320bf7bd3e9SJ. Bruce Fields dp->dl_file = fp; 3321cbf7a75bSJ. Bruce Fields if (!fp->fi_lease) 3322cbf7a75bSJ. Bruce Fields return nfs4_setlease(dp); 3323cdc97505SBenny Halevy spin_lock(&state_lock); 3324cbf7a75bSJ. Bruce Fields atomic_inc(&fp->fi_delegees); 3325acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 3326cdc97505SBenny Halevy spin_unlock(&state_lock); 3327cbf7a75bSJ. Bruce Fields return -EAGAIN; 3328acfdf5c3SJ. Bruce Fields } 3329931ee56cSBenny Halevy hash_delegation_locked(dp, fp); 3330cdc97505SBenny Halevy spin_unlock(&state_lock); 3331edab9782SJ. Bruce Fields return 0; 3332edab9782SJ. Bruce Fields } 3333edab9782SJ. Bruce Fields 33344aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 33354aa8913cSBenny Halevy { 33364aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 33374aa8913cSBenny Halevy if (status == -EAGAIN) 33384aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 33394aa8913cSBenny Halevy else { 33404aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 33414aa8913cSBenny Halevy switch (open->op_deleg_want) { 33424aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 33434aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 33444aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 33454aa8913cSBenny Halevy break; 33464aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 33474aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 33484aa8913cSBenny Halevy break; 33494aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 3350063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 33514aa8913cSBenny Halevy } 33524aa8913cSBenny Halevy } 33534aa8913cSBenny Halevy } 33544aa8913cSBenny Halevy 33551da177e4SLinus Torvalds /* 33561da177e4SLinus Torvalds * Attempt to hand out a delegation. 335799c41515SJ. Bruce Fields * 335899c41515SJ. Bruce Fields * Note we don't support write delegations, and won't until the vfs has 335999c41515SJ. Bruce Fields * proper support for them. 33601da177e4SLinus Torvalds */ 33611da177e4SLinus Torvalds static void 33625ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 33635ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 33641da177e4SLinus Torvalds { 33651da177e4SLinus Torvalds struct nfs4_delegation *dp; 3366fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 336714a24e99SJ. Bruce Fields int cb_up; 336899c41515SJ. Bruce Fields int status = 0; 33691da177e4SLinus Torvalds 3370fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 33717b190fecSNeilBrown open->op_recall = 0; 33727b190fecSNeilBrown switch (open->op_claim_type) { 33737b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 33742bf23875SJ. Bruce Fields if (!cb_up) 33757b190fecSNeilBrown open->op_recall = 1; 337699c41515SJ. Bruce Fields if (open->op_delegate_type != NFS4_OPEN_DELEGATE_READ) 337799c41515SJ. Bruce Fields goto out_no_deleg; 33787b190fecSNeilBrown break; 33797b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 3380ed47b062SMing Chen case NFS4_OPEN_CLAIM_FH: 338199c41515SJ. Bruce Fields /* 338299c41515SJ. Bruce Fields * Let's not give out any delegations till everyone's 338399c41515SJ. Bruce Fields * had the chance to reclaim theirs.... 338499c41515SJ. Bruce Fields */ 33855ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 338699c41515SJ. Bruce Fields goto out_no_deleg; 3387dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 338899c41515SJ. Bruce Fields goto out_no_deleg; 33899a0590aeSSteve Dickson /* 33909a0590aeSSteve Dickson * Also, if the file was opened for write or 33919a0590aeSSteve Dickson * create, there's a good chance the client's 33929a0590aeSSteve Dickson * about to write to it, resulting in an 33939a0590aeSSteve Dickson * immediate recall (since we don't support 33949a0590aeSSteve Dickson * write delegations): 33959a0590aeSSteve Dickson */ 33961da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 339799c41515SJ. Bruce Fields goto out_no_deleg; 339899c41515SJ. Bruce Fields if (open->op_create == NFS4_OPEN_CREATE) 339999c41515SJ. Bruce Fields goto out_no_deleg; 34007b190fecSNeilBrown break; 34017b190fecSNeilBrown default: 340299c41515SJ. Bruce Fields goto out_no_deleg; 34037b190fecSNeilBrown } 340499c41515SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh); 3405dd239cc0SJ. Bruce Fields if (dp == NULL) 3406dd239cc0SJ. Bruce Fields goto out_no_deleg; 3407bf7bd3e9SJ. Bruce Fields status = nfs4_set_delegation(dp, stp->st_file); 3408edab9782SJ. Bruce Fields if (status) 3409dd239cc0SJ. Bruce Fields goto out_free; 34101da177e4SLinus Torvalds 3411d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 34121da177e4SLinus Torvalds 34138c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 3414d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 341599c41515SJ. Bruce Fields open->op_delegate_type = NFS4_OPEN_DELEGATE_READ; 3416dd239cc0SJ. Bruce Fields return; 3417dd239cc0SJ. Bruce Fields out_free: 3418cbf7a75bSJ. Bruce Fields destroy_delegation(dp); 3419dd239cc0SJ. Bruce Fields out_no_deleg: 342099c41515SJ. Bruce Fields open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE; 34217b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 3422d08d32e6SJ. Bruce Fields open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) { 34231da177e4SLinus Torvalds dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 3424d08d32e6SJ. Bruce Fields open->op_recall = 1; 3425d08d32e6SJ. Bruce Fields } 3426dd239cc0SJ. Bruce Fields 3427dd239cc0SJ. Bruce Fields /* 4.1 client asking for a delegation? */ 3428dd239cc0SJ. Bruce Fields if (open->op_deleg_want) 3429dd239cc0SJ. Bruce Fields nfsd4_open_deleg_none_ext(open, status); 3430dd239cc0SJ. Bruce Fields return; 34311da177e4SLinus Torvalds } 34321da177e4SLinus Torvalds 3433e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 3434e27f49c3SBenny Halevy struct nfs4_delegation *dp) 3435e27f49c3SBenny Halevy { 3436e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3437e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3438e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3439e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3440e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3441e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3442e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3443e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3444e27f49c3SBenny Halevy } 3445e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3446e27f49c3SBenny Halevy * it already has, therefore we don't return 3447e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3448e27f49c3SBenny Halevy */ 3449e27f49c3SBenny Halevy } 3450e27f49c3SBenny Halevy 34511da177e4SLinus Torvalds /* 34521da177e4SLinus Torvalds * called with nfs4_lock_state() held. 34531da177e4SLinus Torvalds */ 3454b37ad28bSAl Viro __be32 34551da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 34561da177e4SLinus Torvalds { 34576668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 345838c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 34591da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 34601da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3461dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3462567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3463b37ad28bSAl Viro __be32 status; 34641da177e4SLinus Torvalds 34651da177e4SLinus Torvalds /* 34661da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 34671da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 34681da177e4SLinus Torvalds * If not found, create the nfs4_file struct 34691da177e4SLinus Torvalds */ 3470950e0118STrond Myklebust fp = find_or_add_file(ino, open->op_file); 3471950e0118STrond Myklebust if (fp != open->op_file) { 34721da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 34731da177e4SLinus Torvalds goto out; 347441d22663SJ. Bruce Fields status = nfs4_check_deleg(cl, open, &dp); 3475c44c5eebSNeilBrown if (status) 3476c44c5eebSNeilBrown goto out; 34771da177e4SLinus Torvalds } else { 3478950e0118STrond Myklebust open->op_file = NULL; 3479c44c5eebSNeilBrown status = nfserr_bad_stateid; 34808b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3481c44c5eebSNeilBrown goto out; 34823e772463SJ. Bruce Fields status = nfserr_jukebox; 34831da177e4SLinus Torvalds } 34841da177e4SLinus Torvalds 34851da177e4SLinus Torvalds /* 34861da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 34871da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 34881da177e4SLinus Torvalds */ 34891da177e4SLinus Torvalds if (stp) { 34901da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3491f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 34921da177e4SLinus Torvalds if (status) 34931da177e4SLinus Torvalds goto out; 34941da177e4SLinus Torvalds } else { 34954cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3496567d9829SNeilBrown if (status) 34971da177e4SLinus Torvalds goto out; 34984cdc951bSJ. Bruce Fields stp = open->op_stp; 34994cdc951bSJ. Bruce Fields open->op_stp = NULL; 3500996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 35011da177e4SLinus Torvalds } 3502dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3503dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 35041da177e4SLinus Torvalds 3505d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3506d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3507d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3508d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3509d24433cdSBenny Halevy goto nodeleg; 3510d24433cdSBenny Halevy } 3511d24433cdSBenny Halevy } 3512d24433cdSBenny Halevy 35131da177e4SLinus Torvalds /* 35141da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 35151da177e4SLinus Torvalds * OPEN succeeds even if we fail. 35161da177e4SLinus Torvalds */ 35175ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3518d24433cdSBenny Halevy nodeleg: 35191da177e4SLinus Torvalds status = nfs_ok; 35201da177e4SLinus Torvalds 35218c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3522dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 35231da177e4SLinus Torvalds out: 3524d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3525d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3526e27f49c3SBenny Halevy open->op_deleg_want) 3527e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3528d24433cdSBenny Halevy 352913cd2184SNeilBrown if (fp) 353013cd2184SNeilBrown put_nfs4_file(fp); 353137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 35321255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 35331da177e4SLinus Torvalds /* 35341da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 35351da177e4SLinus Torvalds */ 35361da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3537dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 35386668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 35391da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 35401da177e4SLinus Torvalds 35411da177e4SLinus Torvalds return status; 35421da177e4SLinus Torvalds } 35431da177e4SLinus Torvalds 3544d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3545d29b20cdSJ. Bruce Fields { 3546d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3547d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3548d29b20cdSJ. Bruce Fields 3549d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3550d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3551d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3552d29b20cdSJ. Bruce Fields if (status) { 3553d29b20cdSJ. Bruce Fields release_openowner(oo); 3554d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3555d29b20cdSJ. Bruce Fields } else 3556d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3557d29b20cdSJ. Bruce Fields } 3558d29b20cdSJ. Bruce Fields } 355932513b40SJ. Bruce Fields if (open->op_file) 356032513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 35614cdc951bSJ. Bruce Fields if (open->op_stp) 3562ef79859eSJ. Bruce Fields free_generic_stateid(open->op_stp); 3563d29b20cdSJ. Bruce Fields } 3564d29b20cdSJ. Bruce Fields 3565b37ad28bSAl Viro __be32 3566b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3567b591480bSJ.Bruce Fields clientid_t *clid) 35681da177e4SLinus Torvalds { 35691da177e4SLinus Torvalds struct nfs4_client *clp; 3570b37ad28bSAl Viro __be32 status; 35717f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 35721da177e4SLinus Torvalds 35731da177e4SLinus Torvalds nfs4_lock_state(); 35741da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 35751da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 35764b24ca7dSJeff Layton status = lookup_clientid(clid, cstate, nn); 35779b2ef62bSJ. Bruce Fields if (status) 35781da177e4SLinus Torvalds goto out; 35794b24ca7dSJeff Layton clp = cstate->clp; 35801da177e4SLinus Torvalds status = nfserr_cb_path_down; 3581ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 358277a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 35831da177e4SLinus Torvalds goto out; 35841da177e4SLinus Torvalds status = nfs_ok; 35851da177e4SLinus Torvalds out: 35861da177e4SLinus Torvalds nfs4_unlock_state(); 35871da177e4SLinus Torvalds return status; 35881da177e4SLinus Torvalds } 35891da177e4SLinus Torvalds 3590a76b4319SNeilBrown static void 359112760c66SStanislav Kinsbursky nfsd4_end_grace(struct nfsd_net *nn) 3592a76b4319SNeilBrown { 359333dcc481SJeff Layton /* do nothing if grace period already ended */ 3594a51c84edSStanislav Kinsbursky if (nn->grace_ended) 359533dcc481SJeff Layton return; 359633dcc481SJeff Layton 3597a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3598a51c84edSStanislav Kinsbursky nn->grace_ended = true; 359912760c66SStanislav Kinsbursky nfsd4_record_grace_done(nn, nn->boot_time); 36005e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3601e46b498cSJ. Bruce Fields /* 3602e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3603e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3604e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3605e46b498cSJ. Bruce Fields */ 36065284b44eSStanislav Kinsbursky nn->nfsd4_grace = nn->nfsd4_lease; 3607a76b4319SNeilBrown } 3608a76b4319SNeilBrown 3609fd39ca9aSNeilBrown static time_t 361009121281SStanislav Kinsbursky nfs4_laundromat(struct nfsd_net *nn) 36111da177e4SLinus Torvalds { 36121da177e4SLinus Torvalds struct nfs4_client *clp; 3613fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 36141da177e4SLinus Torvalds struct nfs4_delegation *dp; 36151da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 36163d733711SStanislav Kinsbursky time_t cutoff = get_seconds() - nn->nfsd4_lease; 3617a832e7aeSJeff Layton time_t t, new_timeo = nn->nfsd4_lease; 36181da177e4SLinus Torvalds 36191da177e4SLinus Torvalds nfs4_lock_state(); 36201da177e4SLinus Torvalds 36211da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 362212760c66SStanislav Kinsbursky nfsd4_end_grace(nn); 362336acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 3624c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 36255ed58bb2SStanislav Kinsbursky list_for_each_safe(pos, next, &nn->client_lru) { 36261da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 36271da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 36281da177e4SLinus Torvalds t = clp->cl_time - cutoff; 3629a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 36301da177e4SLinus Torvalds break; 36311da177e4SLinus Torvalds } 3632221a6876SJ. Bruce Fields if (mark_client_expired_locked(clp)) { 3633d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3634d7682988SBenny Halevy clp->cl_clientid.cl_id); 3635d7682988SBenny Halevy continue; 3636d7682988SBenny Halevy } 3637221a6876SJ. Bruce Fields list_move(&clp->cl_lru, &reaplist); 363836acb66bSBenny Halevy } 3639c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 364036acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 364136acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 36421da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 36431da177e4SLinus Torvalds clp->cl_clientid.cl_id); 36441da177e4SLinus Torvalds expire_client(clp); 36451da177e4SLinus Torvalds } 3646cdc97505SBenny Halevy spin_lock(&state_lock); 3647e8c69d17SJ. Bruce Fields list_for_each_safe(pos, next, &nn->del_recall_lru) { 36481da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 36494e37a7c2SStanislav Kinsbursky if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) 36504e37a7c2SStanislav Kinsbursky continue; 36511da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 3652a832e7aeSJeff Layton t = dp->dl_time - cutoff; 3653a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 36541da177e4SLinus Torvalds break; 36551da177e4SLinus Torvalds } 36561da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 36571da177e4SLinus Torvalds } 3658cdc97505SBenny Halevy spin_unlock(&state_lock); 36591da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 36601da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 36613bd64a5bSJ. Bruce Fields revoke_delegation(dp); 36621da177e4SLinus Torvalds } 366373758fedSStanislav Kinsbursky list_for_each_safe(pos, next, &nn->close_lru) { 3664fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3665fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3666a832e7aeSJeff Layton t = oo->oo_time - cutoff; 3667a832e7aeSJeff Layton new_timeo = min(new_timeo, t); 36681da177e4SLinus Torvalds break; 36691da177e4SLinus Torvalds } 3670fe0750e5SJ. Bruce Fields release_openowner(oo); 36711da177e4SLinus Torvalds } 3672a832e7aeSJeff Layton new_timeo = max_t(time_t, new_timeo, NFSD_LAUNDROMAT_MINTIMEOUT); 36731da177e4SLinus Torvalds nfs4_unlock_state(); 3674a832e7aeSJeff Layton return new_timeo; 36751da177e4SLinus Torvalds } 36761da177e4SLinus Torvalds 3677a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3678a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3679a254b246SHarvey Harrison 3680a254b246SHarvey Harrison static void 368109121281SStanislav Kinsbursky laundromat_main(struct work_struct *laundry) 36821da177e4SLinus Torvalds { 36831da177e4SLinus Torvalds time_t t; 368409121281SStanislav Kinsbursky struct delayed_work *dwork = container_of(laundry, struct delayed_work, 368509121281SStanislav Kinsbursky work); 368609121281SStanislav Kinsbursky struct nfsd_net *nn = container_of(dwork, struct nfsd_net, 368709121281SStanislav Kinsbursky laundromat_work); 36881da177e4SLinus Torvalds 368909121281SStanislav Kinsbursky t = nfs4_laundromat(nn); 36901da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 369109121281SStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); 36921da177e4SLinus Torvalds } 36931da177e4SLinus Torvalds 3694f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3695f8816512SNeilBrown { 3696f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3697f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3698f7a4d872SJ. Bruce Fields return nfs_ok; 36991da177e4SLinus Torvalds } 37001da177e4SLinus Torvalds 37011da177e4SLinus Torvalds static inline int 370282c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 37031da177e4SLinus Torvalds { 370482c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 370582c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 370682c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 37071da177e4SLinus Torvalds } 37081da177e4SLinus Torvalds 37091da177e4SLinus Torvalds static inline int 371082c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 37111da177e4SLinus Torvalds { 371282c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 371382c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 37141da177e4SLinus Torvalds } 37151da177e4SLinus Torvalds 37161da177e4SLinus Torvalds static 3717dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 37181da177e4SLinus Torvalds { 3719b37ad28bSAl Viro __be32 status = nfserr_openmode; 37201da177e4SLinus Torvalds 372102921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 372202921914SJ. Bruce Fields if (stp->st_openstp) 372302921914SJ. Bruce Fields stp = stp->st_openstp; 372482c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 37251da177e4SLinus Torvalds goto out; 372682c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 37271da177e4SLinus Torvalds goto out; 37281da177e4SLinus Torvalds status = nfs_ok; 37291da177e4SLinus Torvalds out: 37301da177e4SLinus Torvalds return status; 37311da177e4SLinus Torvalds } 37321da177e4SLinus Torvalds 3733b37ad28bSAl Viro static inline __be32 37345ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 37351da177e4SLinus Torvalds { 3736203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 37371da177e4SLinus Torvalds return nfs_ok; 37385ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 373925985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 37401da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 37411da177e4SLinus Torvalds return nfserr_grace; 37421da177e4SLinus Torvalds } else if (flags & WR_STATE) 37431da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 37441da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 37451da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 37461da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 37471da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 37481da177e4SLinus Torvalds } 37491da177e4SLinus Torvalds 37501da177e4SLinus Torvalds /* 37511da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 37521da177e4SLinus Torvalds * that are not able to provide mandatory locking. 37531da177e4SLinus Torvalds */ 37541da177e4SLinus Torvalds static inline int 37555ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 37561da177e4SLinus Torvalds { 37575ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 37581da177e4SLinus Torvalds } 37591da177e4SLinus Torvalds 376081b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 376181b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 376281b82965SJ. Bruce Fields { 37631a9357f4SJim Rees return (s32)(a->si_generation - b->si_generation) > 0; 376481b82965SJ. Bruce Fields } 376581b82965SJ. Bruce Fields 376657b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 37670836f587SJ. Bruce Fields { 37686668958fSAndy Adamson /* 37696668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 37706668958fSAndy Adamson * when it is zero. 37716668958fSAndy Adamson */ 377228dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 377381b82965SJ. Bruce Fields return nfs_ok; 377481b82965SJ. Bruce Fields 377581b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 377681b82965SJ. Bruce Fields return nfs_ok; 37776668958fSAndy Adamson 37780836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 377981b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 37800836f587SJ. Bruce Fields return nfserr_bad_stateid; 37810836f587SJ. Bruce Fields /* 378281b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 378381b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 378481b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 378581b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 378681b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 378781b82965SJ. Bruce Fields * but better performance may result in retrying IO that 378881b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 378981b82965SJ. Bruce Fields * reordered in flight: 37900836f587SJ. Bruce Fields */ 37910836f587SJ. Bruce Fields return nfserr_old_stateid; 37920836f587SJ. Bruce Fields } 37930836f587SJ. Bruce Fields 37947df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 379517456804SBryan Schumaker { 379697b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 379797b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 379897b7e3b6SJ. Bruce Fields __be32 status; 379917456804SBryan Schumaker 38007df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 38017df302f7SChuck Lever return nfserr_bad_stateid; 38027df302f7SChuck Lever /* Client debugging aid. */ 38037df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 38047df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 38057df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 38067df302f7SChuck Lever sizeof(addr_str)); 38077df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 38087df302f7SChuck Lever "with incorrect client ID\n", addr_str); 38097df302f7SChuck Lever return nfserr_bad_stateid; 38107df302f7SChuck Lever } 381138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 381297b7e3b6SJ. Bruce Fields if (!s) 38137df302f7SChuck Lever return nfserr_bad_stateid; 381436279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 381517456804SBryan Schumaker if (status) 381617456804SBryan Schumaker return status; 381723340032SJ. Bruce Fields switch (s->sc_type) { 381823340032SJ. Bruce Fields case NFS4_DELEG_STID: 381997b7e3b6SJ. Bruce Fields return nfs_ok; 38203bd64a5bSJ. Bruce Fields case NFS4_REVOKED_DELEG_STID: 38213bd64a5bSJ. Bruce Fields return nfserr_deleg_revoked; 382223340032SJ. Bruce Fields case NFS4_OPEN_STID: 382323340032SJ. Bruce Fields case NFS4_LOCK_STID: 382497b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 382597b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 382623340032SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags 382723340032SJ. Bruce Fields & NFS4_OO_CONFIRMED)) 382897b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 382997b7e3b6SJ. Bruce Fields return nfs_ok; 383023340032SJ. Bruce Fields default: 383123340032SJ. Bruce Fields printk("unknown stateid type %x\n", s->sc_type); 383223340032SJ. Bruce Fields case NFS4_CLOSED_STID: 383323340032SJ. Bruce Fields return nfserr_bad_stateid; 383423340032SJ. Bruce Fields } 383517456804SBryan Schumaker } 383617456804SBryan Schumaker 38372dd6e458STrond Myklebust static __be32 38382dd6e458STrond Myklebust nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 38392dd6e458STrond Myklebust stateid_t *stateid, unsigned char typemask, 38402dd6e458STrond Myklebust struct nfs4_stid **s, struct nfsd_net *nn) 384138c2f4b1SJ. Bruce Fields { 38420eb6f20aSJ. Bruce Fields __be32 status; 384338c2f4b1SJ. Bruce Fields 384438c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 384538c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 38464b24ca7dSJeff Layton status = lookup_clientid(&stateid->si_opaque.so_clid, cstate, nn); 3847a8a7c677STrond Myklebust if (status == nfserr_stale_clientid) { 38484b24ca7dSJeff Layton if (cstate->session) 3849a8a7c677STrond Myklebust return nfserr_bad_stateid; 385038c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 3851a8a7c677STrond Myklebust } 38520eb6f20aSJ. Bruce Fields if (status) 38530eb6f20aSJ. Bruce Fields return status; 38544b24ca7dSJeff Layton *s = find_stateid_by_type(cstate->clp, stateid, typemask); 385538c2f4b1SJ. Bruce Fields if (!*s) 385638c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 385738c2f4b1SJ. Bruce Fields return nfs_ok; 385838c2f4b1SJ. Bruce Fields } 385938c2f4b1SJ. Bruce Fields 38601da177e4SLinus Torvalds /* 38611da177e4SLinus Torvalds * Checks for stateid operations 38621da177e4SLinus Torvalds */ 3863b37ad28bSAl Viro __be32 38645ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3865dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 38661da177e4SLinus Torvalds { 386769064a27SJ. Bruce Fields struct nfs4_stid *s; 3868dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 38691da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3870dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 38711da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 38723320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 387314bcab1aSTrond Myklebust struct file *file = NULL; 3874b37ad28bSAl Viro __be32 status; 38751da177e4SLinus Torvalds 38761da177e4SLinus Torvalds if (filpp) 38771da177e4SLinus Torvalds *filpp = NULL; 38781da177e4SLinus Torvalds 38795ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 38801da177e4SLinus Torvalds return nfserr_grace; 38811da177e4SLinus Torvalds 38821da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 38835ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 38841da177e4SLinus Torvalds 388514bcab1aSTrond Myklebust nfs4_lock_state(); 388614bcab1aSTrond Myklebust 38872dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, 3888db24b3b4SJeff Layton NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, 38892dd6e458STrond Myklebust &s, nn); 389038c2f4b1SJ. Bruce Fields if (status) 389114bcab1aSTrond Myklebust goto out; 389269064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 38930c2a498fSJ. Bruce Fields if (status) 38940c2a498fSJ. Bruce Fields goto out; 3895f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3896f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 389769064a27SJ. Bruce Fields dp = delegstateid(s); 3898dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3899dc9bf700SJ. Bruce Fields if (status) 3900dc9bf700SJ. Bruce Fields goto out; 390143b0178eSDan Carpenter if (filpp) { 390214bcab1aSTrond Myklebust file = dp->dl_file->fi_deleg_file; 390314bcab1aSTrond Myklebust if (!file) { 3904063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 3905063b0fb9SJ. Bruce Fields status = nfserr_serverfault; 3906063b0fb9SJ. Bruce Fields goto out; 3907063b0fb9SJ. Bruce Fields } 390843b0178eSDan Carpenter } 3909f7a4d872SJ. Bruce Fields break; 3910f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3911f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 391269064a27SJ. Bruce Fields stp = openlockstateid(s); 3913f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3914f7a4d872SJ. Bruce Fields if (status) 39151da177e4SLinus Torvalds goto out; 3916fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3917dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 39181da177e4SLinus Torvalds goto out; 3919a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3920a4455be0SJ. Bruce Fields if (status) 39211da177e4SLinus Torvalds goto out; 3922f9d7562fSJ. Bruce Fields if (filpp) { 3923f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 392414bcab1aSTrond Myklebust file = find_readable_file(stp->st_file); 3925f9d7562fSJ. Bruce Fields else 392614bcab1aSTrond Myklebust file = find_writeable_file(stp->st_file); 3927f9d7562fSJ. Bruce Fields } 3928f7a4d872SJ. Bruce Fields break; 3929f7a4d872SJ. Bruce Fields default: 393014bcab1aSTrond Myklebust status = nfserr_bad_stateid; 393114bcab1aSTrond Myklebust goto out; 39321da177e4SLinus Torvalds } 39331da177e4SLinus Torvalds status = nfs_ok; 393414bcab1aSTrond Myklebust if (file) 393514bcab1aSTrond Myklebust *filpp = get_file(file); 39361da177e4SLinus Torvalds out: 393714bcab1aSTrond Myklebust nfs4_unlock_state(); 39381da177e4SLinus Torvalds return status; 39391da177e4SLinus Torvalds } 39401da177e4SLinus Torvalds 3941e1ca12dfSBryan Schumaker static __be32 3942dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3943e1ca12dfSBryan Schumaker { 3944a1b8ff4cSJ. Bruce Fields struct nfs4_lockowner *lo = lockowner(stp->st_stateowner); 3945a1b8ff4cSJ. Bruce Fields 3946a1b8ff4cSJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 3947e1ca12dfSBryan Schumaker return nfserr_locks_held; 3948c53530daSJeff Layton release_lockowner_if_empty(lo); 3949e1ca12dfSBryan Schumaker return nfs_ok; 3950e1ca12dfSBryan Schumaker } 3951e1ca12dfSBryan Schumaker 3952e1ca12dfSBryan Schumaker /* 395317456804SBryan Schumaker * Test if the stateid is valid 395417456804SBryan Schumaker */ 395517456804SBryan Schumaker __be32 395617456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 395717456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 395817456804SBryan Schumaker { 395903cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 396003cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 396103cfb420SBryan Schumaker 396203cfb420SBryan Schumaker nfs4_lock_state(); 396303cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 39647df302f7SChuck Lever stateid->ts_id_status = 39657df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 396603cfb420SBryan Schumaker nfs4_unlock_state(); 396703cfb420SBryan Schumaker 396817456804SBryan Schumaker return nfs_ok; 396917456804SBryan Schumaker } 397017456804SBryan Schumaker 3971e1ca12dfSBryan Schumaker __be32 3972e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3973e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3974e1ca12dfSBryan Schumaker { 3975e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 39762da1cec7SJ. Bruce Fields struct nfs4_stid *s; 39773bd64a5bSJ. Bruce Fields struct nfs4_delegation *dp; 397838c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 39792da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3980e1ca12dfSBryan Schumaker 3981e1ca12dfSBryan Schumaker nfs4_lock_state(); 398238c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 39832da1cec7SJ. Bruce Fields if (!s) 3984e1ca12dfSBryan Schumaker goto out; 39852da1cec7SJ. Bruce Fields switch (s->sc_type) { 39862da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3987e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3988e1ca12dfSBryan Schumaker goto out; 39892da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 39902da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 39912da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 39922da1cec7SJ. Bruce Fields if (ret) 3993e1ca12dfSBryan Schumaker goto out; 39942da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 39952da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 39962da1cec7SJ. Bruce Fields else 39972da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3998f7a4d872SJ. Bruce Fields break; 39993bd64a5bSJ. Bruce Fields case NFS4_REVOKED_DELEG_STID: 40003bd64a5bSJ. Bruce Fields dp = delegstateid(s); 40013bd64a5bSJ. Bruce Fields destroy_revoked_delegation(dp); 40023bd64a5bSJ. Bruce Fields ret = nfs_ok; 40033bd64a5bSJ. Bruce Fields break; 4004f7a4d872SJ. Bruce Fields default: 4005f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 4006e1ca12dfSBryan Schumaker } 4007e1ca12dfSBryan Schumaker out: 4008e1ca12dfSBryan Schumaker nfs4_unlock_state(); 4009e1ca12dfSBryan Schumaker return ret; 4010e1ca12dfSBryan Schumaker } 4011e1ca12dfSBryan Schumaker 40124c4cd222SNeilBrown static inline int 40134c4cd222SNeilBrown setlkflg (int type) 40144c4cd222SNeilBrown { 40154c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 40164c4cd222SNeilBrown RD_STATE : WR_STATE; 40174c4cd222SNeilBrown } 40181da177e4SLinus Torvalds 4019dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 4020c0a5d93eSJ. Bruce Fields { 4021c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 4022c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 4023c0a5d93eSJ. Bruce Fields __be32 status; 4024c0a5d93eSJ. Bruce Fields 4025c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 4026c0a5d93eSJ. Bruce Fields if (status) 4027c0a5d93eSJ. Bruce Fields return status; 40283bd64a5bSJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID 40293bd64a5bSJ. Bruce Fields || stp->st_stid.sc_type == NFS4_REVOKED_DELEG_STID) 4030f7a4d872SJ. Bruce Fields /* 4031f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 40323bd64a5bSJ. Bruce Fields * nfserr_replay_me from the previous step, and 40333bd64a5bSJ. Bruce Fields * revoked delegations are kept only for free_stateid. 4034f7a4d872SJ. Bruce Fields */ 4035f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 4036f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 4037f7a4d872SJ. Bruce Fields if (status) 4038f7a4d872SJ. Bruce Fields return status; 4039f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 4040c0a5d93eSJ. Bruce Fields } 4041c0a5d93eSJ. Bruce Fields 40421da177e4SLinus Torvalds /* 40431da177e4SLinus Torvalds * Checks for sequence id mutating operations. 40441da177e4SLinus Torvalds */ 4045b37ad28bSAl Viro static __be32 4046dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 40472288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 40483320fef1SStanislav Kinsbursky struct nfs4_ol_stateid **stpp, 40493320fef1SStanislav Kinsbursky struct nfsd_net *nn) 40501da177e4SLinus Torvalds { 40510836f587SJ. Bruce Fields __be32 status; 405238c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 4053e17f99b7STrond Myklebust struct nfs4_ol_stateid *stp = NULL; 40541da177e4SLinus Torvalds 40558c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 40568c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 40571da177e4SLinus Torvalds 40581da177e4SLinus Torvalds *stpp = NULL; 40592dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, typemask, &s, nn); 4060c0a5d93eSJ. Bruce Fields if (status) 4061c0a5d93eSJ. Bruce Fields return status; 4062e17f99b7STrond Myklebust stp = openlockstateid(s); 40633d74e6a5SJ. Bruce Fields if (!nfsd4_has_session(cstate)) 4064e17f99b7STrond Myklebust cstate->replay_owner = stp->st_stateowner; 40651da177e4SLinus Torvalds 4066e17f99b7STrond Myklebust status = nfs4_seqid_op_checks(cstate, stateid, seqid, stp); 4067e17f99b7STrond Myklebust if (!status) 4068e17f99b7STrond Myklebust *stpp = stp; 4069e17f99b7STrond Myklebust return status; 40701da177e4SLinus Torvalds } 40711da177e4SLinus Torvalds 40723320fef1SStanislav Kinsbursky static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 40733320fef1SStanislav Kinsbursky stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) 4074c0a5d93eSJ. Bruce Fields { 4075c0a5d93eSJ. Bruce Fields __be32 status; 4076c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 40771da177e4SLinus Torvalds 4078c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 40793320fef1SStanislav Kinsbursky NFS4_OPEN_STID, stpp, nn); 40800836f587SJ. Bruce Fields if (status) 40810836f587SJ. Bruce Fields return status; 4082c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 4083dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 4084c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 40853a4f98bbSNeilBrown return nfs_ok; 40861da177e4SLinus Torvalds } 40871da177e4SLinus Torvalds 4088b37ad28bSAl Viro __be32 4089ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4090a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 40911da177e4SLinus Torvalds { 4092b37ad28bSAl Viro __be32 status; 4093fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 4094dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 40953320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 40961da177e4SLinus Torvalds 4097a6a9f18fSAl Viro dprintk("NFSD: nfsd4_open_confirm on file %pd\n", 4098a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 40991da177e4SLinus Torvalds 4100ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 4101a8cddc5dSJ. Bruce Fields if (status) 4102a8cddc5dSJ. Bruce Fields return status; 41031da177e4SLinus Torvalds 41041da177e4SLinus Torvalds nfs4_lock_state(); 41051da177e4SLinus Torvalds 41069072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 4107ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 41083320fef1SStanislav Kinsbursky NFS4_OPEN_STID, &stp, nn); 41099072d5c6SJ. Bruce Fields if (status) 41101da177e4SLinus Torvalds goto out; 4111fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 411268b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 4113dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 411468b66e82SJ. Bruce Fields goto out; 4115dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 4116dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4117dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 41188c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 4119dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 4120c7b9a459SNeilBrown 41212a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 412268b66e82SJ. Bruce Fields status = nfs_ok; 41231da177e4SLinus Torvalds out: 41249411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 41255ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41261da177e4SLinus Torvalds nfs4_unlock_state(); 41271da177e4SLinus Torvalds return status; 41281da177e4SLinus Torvalds } 41291da177e4SLinus Torvalds 41306409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 41311da177e4SLinus Torvalds { 413282c5ff1bSJeff Layton if (!test_access(access, stp)) 41336409a5a6SJ. Bruce Fields return; 41346409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 413582c5ff1bSJeff Layton clear_access(access, stp); 4136f197c271SJ. Bruce Fields } 41376409a5a6SJ. Bruce Fields 41386409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 41396409a5a6SJ. Bruce Fields { 41406409a5a6SJ. Bruce Fields switch (to_access) { 41416409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 41426409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 41436409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 41446409a5a6SJ. Bruce Fields break; 41456409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 41466409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 41476409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 41486409a5a6SJ. Bruce Fields break; 41496409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 41506409a5a6SJ. Bruce Fields break; 41516409a5a6SJ. Bruce Fields default: 4152063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 41531da177e4SLinus Torvalds } 41541da177e4SLinus Torvalds } 41551da177e4SLinus Torvalds 41561da177e4SLinus Torvalds static void 4157ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 41581da177e4SLinus Torvalds { 41591da177e4SLinus Torvalds int i; 41601da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 41611da177e4SLinus Torvalds if ((i & deny) != i) 4162ce0fc43cSJeff Layton clear_deny(i, stp); 41631da177e4SLinus Torvalds } 41641da177e4SLinus Torvalds } 41651da177e4SLinus Torvalds 4166b37ad28bSAl Viro __be32 4167ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 4168ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 4169a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 41701da177e4SLinus Torvalds { 4171b37ad28bSAl Viro __be32 status; 4172dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 41733320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 41741da177e4SLinus Torvalds 4175a6a9f18fSAl Viro dprintk("NFSD: nfsd4_open_downgrade on file %pd\n", 4176a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 41771da177e4SLinus Torvalds 4178c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 41792c8bd7e0SBenny Halevy if (od->od_deleg_want) 41802c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 41812c8bd7e0SBenny Halevy od->od_deleg_want); 41821da177e4SLinus Torvalds 41831da177e4SLinus Torvalds nfs4_lock_state(); 4184c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 41853320fef1SStanislav Kinsbursky &od->od_stateid, &stp, nn); 41869072d5c6SJ. Bruce Fields if (status) 41871da177e4SLinus Torvalds goto out; 41881da177e4SLinus Torvalds status = nfserr_inval; 418982c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 41901da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 41911da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 41921da177e4SLinus Torvalds goto out; 41931da177e4SLinus Torvalds } 4194ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 41951da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 41961da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 41971da177e4SLinus Torvalds goto out; 41981da177e4SLinus Torvalds } 41996409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 42001da177e4SLinus Torvalds 4201ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 42021da177e4SLinus Torvalds 4203dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4204dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 42051da177e4SLinus Torvalds status = nfs_ok; 42061da177e4SLinus Torvalds out: 42079411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 42085ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42091da177e4SLinus Torvalds nfs4_unlock_state(); 42101da177e4SLinus Torvalds return status; 42111da177e4SLinus Torvalds } 42121da177e4SLinus Torvalds 4213f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 4214f7a4d872SJ. Bruce Fields { 4215acf9295bSTrond Myklebust struct nfs4_client *clp = s->st_stid.sc_client; 4216acf9295bSTrond Myklebust struct nfs4_openowner *oo = openowner(s->st_stateowner); 4217acf9295bSTrond Myklebust 4218f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 4219acf9295bSTrond Myklebust unhash_open_stateid(s); 4220acf9295bSTrond Myklebust 4221acf9295bSTrond Myklebust if (clp->cl_minorversion) { 4222acf9295bSTrond Myklebust free_generic_stateid(s); 4223acf9295bSTrond Myklebust if (list_empty(&oo->oo_owner.so_stateids)) 4224acf9295bSTrond Myklebust release_openowner(oo); 4225acf9295bSTrond Myklebust } else { 4226acf9295bSTrond Myklebust oo->oo_last_closed_stid = s; 4227acf9295bSTrond Myklebust /* 4228acf9295bSTrond Myklebust * In the 4.0 case we need to keep the owners around a 4229acf9295bSTrond Myklebust * little while to handle CLOSE replay. 4230acf9295bSTrond Myklebust */ 4231acf9295bSTrond Myklebust if (list_empty(&oo->oo_owner.so_stateids)) 4232acf9295bSTrond Myklebust move_to_close_lru(oo, clp->net); 4233acf9295bSTrond Myklebust } 423438c387b5SJ. Bruce Fields } 423538c387b5SJ. Bruce Fields 42361da177e4SLinus Torvalds /* 42371da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 42381da177e4SLinus Torvalds */ 4239b37ad28bSAl Viro __be32 4240ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4241a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 42421da177e4SLinus Torvalds { 4243b37ad28bSAl Viro __be32 status; 4244dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42453320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 42463320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 42471da177e4SLinus Torvalds 4248a6a9f18fSAl Viro dprintk("NFSD: nfsd4_close on file %pd\n", 4249a6a9f18fSAl Viro cstate->current_fh.fh_dentry); 42501da177e4SLinus Torvalds 42511da177e4SLinus Torvalds nfs4_lock_state(); 4252f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 4253f7a4d872SJ. Bruce Fields &close->cl_stateid, 4254f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 42553320fef1SStanislav Kinsbursky &stp, nn); 42569411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 42579072d5c6SJ. Bruce Fields if (status) 42581da177e4SLinus Torvalds goto out; 4259dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4260dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 42611da177e4SLinus Torvalds 4262f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 42631da177e4SLinus Torvalds out: 42645ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42651da177e4SLinus Torvalds nfs4_unlock_state(); 42661da177e4SLinus Torvalds return status; 42671da177e4SLinus Torvalds } 42681da177e4SLinus Torvalds 4269b37ad28bSAl Viro __be32 4270ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4271ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 42721da177e4SLinus Torvalds { 4273203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 4274203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 427538c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 4276b37ad28bSAl Viro __be32 status; 42773320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 42781da177e4SLinus Torvalds 4279ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 4280203a8c8eSJ. Bruce Fields return status; 42811da177e4SLinus Torvalds 42821da177e4SLinus Torvalds nfs4_lock_state(); 42832dd6e458STrond Myklebust status = nfsd4_lookup_stateid(cstate, stateid, NFS4_DELEG_STID, &s, nn); 428438c2f4b1SJ. Bruce Fields if (status) 4285203a8c8eSJ. Bruce Fields goto out; 428638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 4287d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 4288203a8c8eSJ. Bruce Fields if (status) 4289203a8c8eSJ. Bruce Fields goto out; 4290203a8c8eSJ. Bruce Fields 42913bd64a5bSJ. Bruce Fields destroy_delegation(dp); 42921da177e4SLinus Torvalds out: 4293203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 4294203a8c8eSJ. Bruce Fields 42951da177e4SLinus Torvalds return status; 42961da177e4SLinus Torvalds } 42971da177e4SLinus Torvalds 42981da177e4SLinus Torvalds 42991da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 43001da177e4SLinus Torvalds 430187df4de8SBenny Halevy static inline u64 430287df4de8SBenny Halevy end_offset(u64 start, u64 len) 430387df4de8SBenny Halevy { 430487df4de8SBenny Halevy u64 end; 430587df4de8SBenny Halevy 430687df4de8SBenny Halevy end = start + len; 430787df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 430887df4de8SBenny Halevy } 430987df4de8SBenny Halevy 431087df4de8SBenny Halevy /* last octet in a range */ 431187df4de8SBenny Halevy static inline u64 431287df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 431387df4de8SBenny Halevy { 431487df4de8SBenny Halevy u64 end; 431587df4de8SBenny Halevy 4316063b0fb9SJ. Bruce Fields WARN_ON_ONCE(!len); 431787df4de8SBenny Halevy end = start + len; 431887df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 431987df4de8SBenny Halevy } 432087df4de8SBenny Halevy 43211da177e4SLinus Torvalds /* 43221da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 43231da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 43241da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 43251da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 43261da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 43271da177e4SLinus Torvalds * the VFS, but this is a very deep change! 43281da177e4SLinus Torvalds */ 43291da177e4SLinus Torvalds static inline void 43301da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 43311da177e4SLinus Torvalds { 43321da177e4SLinus Torvalds if (lock->fl_start < 0) 43331da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 43341da177e4SLinus Torvalds if (lock->fl_end < 0) 43351da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 43361da177e4SLinus Torvalds } 43371da177e4SLinus Torvalds 4338d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 4339d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 43407b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 4341d5b9026aSNeilBrown }; 43421da177e4SLinus Torvalds 43431da177e4SLinus Torvalds static inline void 43441da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 43451da177e4SLinus Torvalds { 4346fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 43471da177e4SLinus Torvalds 4348d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 4349fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 4350fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 4351fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 43527c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 43537c13f344SJ. Bruce Fields /* We just don't care that much */ 43547c13f344SJ. Bruce Fields goto nevermind; 4355fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 4356fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 4357d5b9026aSNeilBrown } else { 43587c13f344SJ. Bruce Fields nevermind: 43597c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 43607c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 4361d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 4362d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 43631da177e4SLinus Torvalds } 43641da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 436587df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 436687df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 43671da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 43681da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 43691da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 43701da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 43711da177e4SLinus Torvalds } 43721da177e4SLinus Torvalds 4373fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 4374b3c32bcdSTrond Myklebust find_lockowner_str(clientid_t *clid, struct xdr_netobj *owner, 4375b3c32bcdSTrond Myklebust struct nfsd_net *nn) 43761da177e4SLinus Torvalds { 4377b3c32bcdSTrond Myklebust unsigned int strhashval = ownerstr_hashval(clid->cl_id, owner); 4378b3c32bcdSTrond Myklebust struct nfs4_stateowner *so; 43791da177e4SLinus Torvalds 4380b3c32bcdSTrond Myklebust list_for_each_entry(so, &nn->ownerstr_hashtbl[strhashval], so_strhash) { 4381b3c32bcdSTrond Myklebust if (so->so_is_open_owner) 4382b3c32bcdSTrond Myklebust continue; 4383b3c32bcdSTrond Myklebust if (!same_owner_str(so, owner, clid)) 4384b3c32bcdSTrond Myklebust continue; 4385b3c32bcdSTrond Myklebust return lockowner(so); 43861da177e4SLinus Torvalds } 43871da177e4SLinus Torvalds return NULL; 43881da177e4SLinus Torvalds } 43891da177e4SLinus Torvalds 43901da177e4SLinus Torvalds /* 43911da177e4SLinus Torvalds * Alloc a lock owner structure. 43921da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 439325985edcSLucas De Marchi * occurred. 43941da177e4SLinus Torvalds * 439516bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 43961da177e4SLinus Torvalds */ 4397fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 4398dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 4399fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4400b3c32bcdSTrond Myklebust struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 44011da177e4SLinus Torvalds 4402fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 4403fe0750e5SJ. Bruce Fields if (!lo) 44041da177e4SLinus Torvalds return NULL; 4405fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 4406fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 4407b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 4408b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 4409fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 4410b3c32bcdSTrond Myklebust list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 4411fe0750e5SJ. Bruce Fields return lo; 44121da177e4SLinus Torvalds } 44131da177e4SLinus Torvalds 4414dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 4415dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 44161da177e4SLinus Torvalds { 4417dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4418d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 44191da177e4SLinus Torvalds 4420996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 44215ac049acSNeilBrown if (stp == NULL) 44226136d2b4SJ. Bruce Fields return NULL; 44233abdb607SJ. Bruce Fields stp->st_stid.sc_type = NFS4_LOCK_STID; 4424fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4425fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 442613cd2184SNeilBrown get_nfs4_file(fp); 44271da177e4SLinus Torvalds stp->st_file = fp; 44280997b173SJ. Bruce Fields stp->st_access_bmap = 0; 44291da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 44304c4cd222SNeilBrown stp->st_openstp = open_stp; 44313c87b9b7STrond Myklebust list_add(&stp->st_locks, &open_stp->st_locks); 4432*1d31a253STrond Myklebust spin_lock(&fp->fi_lock); 4433*1d31a253STrond Myklebust list_add(&stp->st_perfile, &fp->fi_stateids); 4434*1d31a253STrond Myklebust spin_unlock(&fp->fi_lock); 44351da177e4SLinus Torvalds return stp; 44361da177e4SLinus Torvalds } 44371da177e4SLinus Torvalds 4438c53530daSJeff Layton static struct nfs4_ol_stateid * 4439c53530daSJeff Layton find_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp) 4440c53530daSJeff Layton { 4441c53530daSJeff Layton struct nfs4_ol_stateid *lst; 4442c53530daSJeff Layton 4443c53530daSJeff Layton list_for_each_entry(lst, &lo->lo_owner.so_stateids, st_perstateowner) { 4444c53530daSJeff Layton if (lst->st_file == fp) 4445c53530daSJeff Layton return lst; 4446c53530daSJeff Layton } 4447c53530daSJeff Layton return NULL; 4448c53530daSJeff Layton } 4449c53530daSJeff Layton 4450c53530daSJeff Layton 4451fd39ca9aSNeilBrown static int 44521da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 44531da177e4SLinus Torvalds { 445487df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 44551da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 44561da177e4SLinus Torvalds } 44571da177e4SLinus Torvalds 4458dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 44590997b173SJ. Bruce Fields { 44600997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 44610997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 44620997b173SJ. Bruce Fields 446382c5ff1bSJeff Layton if (test_access(access, lock_stp)) 44640997b173SJ. Bruce Fields return; 44650997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 446682c5ff1bSJeff Layton set_access(access, lock_stp); 44670997b173SJ. Bruce Fields } 44680997b173SJ. Bruce Fields 44692355c596SJ. Bruce Fields static __be32 lookup_or_create_lock_state(struct nfsd4_compound_state *cstate, struct nfs4_ol_stateid *ost, struct nfsd4_lock *lock, struct nfs4_ol_stateid **lst, bool *new) 447064a284d0SJ. Bruce Fields { 447164a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 447264a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 447364a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 447464a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 447564a284d0SJ. Bruce Fields unsigned int strhashval; 447620e9e2bcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); 447764a284d0SJ. Bruce Fields 4478b3c32bcdSTrond Myklebust lo = find_lockowner_str(&cl->cl_clientid, &lock->v.new.owner, nn); 4479c53530daSJeff Layton if (!lo) { 448016bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 448164a284d0SJ. Bruce Fields &lock->v.new.owner); 448264a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 448364a284d0SJ. Bruce Fields if (lo == NULL) 448464a284d0SJ. Bruce Fields return nfserr_jukebox; 4485c53530daSJeff Layton } else { 4486c53530daSJeff Layton /* with an existing lockowner, seqids must be the same */ 4487c53530daSJeff Layton if (!cstate->minorversion && 4488c53530daSJeff Layton lock->lk_new_lock_seqid != lo->lo_owner.so_seqid) 4489c53530daSJeff Layton return nfserr_bad_seqid; 4490c53530daSJeff Layton } 4491c53530daSJeff Layton 4492c53530daSJeff Layton *lst = find_lock_stateid(lo, fi); 4493c53530daSJeff Layton if (*lst == NULL) { 449464a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 449564a284d0SJ. Bruce Fields if (*lst == NULL) { 4496c53530daSJeff Layton release_lockowner_if_empty(lo); 449764a284d0SJ. Bruce Fields return nfserr_jukebox; 449864a284d0SJ. Bruce Fields } 449964a284d0SJ. Bruce Fields *new = true; 4500c53530daSJeff Layton } 450164a284d0SJ. Bruce Fields return nfs_ok; 450264a284d0SJ. Bruce Fields } 450364a284d0SJ. Bruce Fields 45041da177e4SLinus Torvalds /* 45051da177e4SLinus Torvalds * LOCK operation 45061da177e4SLinus Torvalds */ 4507b37ad28bSAl Viro __be32 4508ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4509a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 45101da177e4SLinus Torvalds { 4511fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4512fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4513dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 45147d947842SJ. Bruce Fields struct file *filp = NULL; 451521179d81SJeff Layton struct file_lock *file_lock = NULL; 451621179d81SJeff Layton struct file_lock *conflock = NULL; 4517b37ad28bSAl Viro __be32 status = 0; 451864a284d0SJ. Bruce Fields bool new_state = false; 4519b34f27aaSJ. Bruce Fields int lkflg; 4520b8dd7b9aSAl Viro int err; 45213320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 45223320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 45231da177e4SLinus Torvalds 45241da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 45251da177e4SLinus Torvalds (long long) lock->lk_offset, 45261da177e4SLinus Torvalds (long long) lock->lk_length); 45271da177e4SLinus Torvalds 45281da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 45291da177e4SLinus Torvalds return nfserr_inval; 45301da177e4SLinus Torvalds 4531ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 45328837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4533a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4534a6f6ef2fSAndy Adamson return status; 4535a6f6ef2fSAndy Adamson } 4536a6f6ef2fSAndy Adamson 45371da177e4SLinus Torvalds nfs4_lock_state(); 45381da177e4SLinus Torvalds 45391da177e4SLinus Torvalds if (lock->lk_is_new) { 4540dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 45411da177e4SLinus Torvalds 4542684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4543684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4544684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4545684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4546684e5638SJ. Bruce Fields sizeof(clientid_t)); 4547684e5638SJ. Bruce Fields 45481da177e4SLinus Torvalds status = nfserr_stale_clientid; 45492c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 45501da177e4SLinus Torvalds goto out; 45511da177e4SLinus Torvalds 45521da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4553c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 45541da177e4SLinus Torvalds lock->lk_new_open_seqid, 45551da177e4SLinus Torvalds &lock->lk_new_open_stateid, 45563320fef1SStanislav Kinsbursky &open_stp, nn); 455737515177SNeilBrown if (status) 45581da177e4SLinus Torvalds goto out; 4559fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4560b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4561684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4562b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4563b34f27aaSJ. Bruce Fields goto out; 456464a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 456564a284d0SJ. Bruce Fields &lock_stp, &new_state); 4566e1aaa891SJ. Bruce Fields } else 4567dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 45681da177e4SLinus Torvalds lock->lk_old_lock_seqid, 45691da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 45703320fef1SStanislav Kinsbursky NFS4_LOCK_STID, &lock_stp, nn); 45711da177e4SLinus Torvalds if (status) 45721da177e4SLinus Torvalds goto out; 4573fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 45741da177e4SLinus Torvalds 4575b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4576b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4577b34f27aaSJ. Bruce Fields if (status) 4578b34f27aaSJ. Bruce Fields goto out; 4579b34f27aaSJ. Bruce Fields 45800dd395dcSNeilBrown status = nfserr_grace; 45813320fef1SStanislav Kinsbursky if (locks_in_grace(net) && !lock->lk_reclaim) 45820dd395dcSNeilBrown goto out; 45830dd395dcSNeilBrown status = nfserr_no_grace; 45843320fef1SStanislav Kinsbursky if (!locks_in_grace(net) && lock->lk_reclaim) 45850dd395dcSNeilBrown goto out; 45860dd395dcSNeilBrown 458721179d81SJeff Layton file_lock = locks_alloc_lock(); 458821179d81SJeff Layton if (!file_lock) { 458921179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 459021179d81SJeff Layton status = nfserr_jukebox; 459121179d81SJeff Layton goto out; 459221179d81SJeff Layton } 459321179d81SJeff Layton 459421179d81SJeff Layton locks_init_lock(file_lock); 45951da177e4SLinus Torvalds switch (lock->lk_type) { 45961da177e4SLinus Torvalds case NFS4_READ_LT: 45971da177e4SLinus Torvalds case NFS4_READW_LT: 4598f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 45990997b173SJ. Bruce Fields if (filp) 46000997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 460121179d81SJeff Layton file_lock->fl_type = F_RDLCK; 46021da177e4SLinus Torvalds break; 46031da177e4SLinus Torvalds case NFS4_WRITE_LT: 46041da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4605f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 46060997b173SJ. Bruce Fields if (filp) 46070997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 460821179d81SJeff Layton file_lock->fl_type = F_WRLCK; 46091da177e4SLinus Torvalds break; 46101da177e4SLinus Torvalds default: 46111da177e4SLinus Torvalds status = nfserr_inval; 46121da177e4SLinus Torvalds goto out; 46131da177e4SLinus Torvalds } 4614f9d7562fSJ. Bruce Fields if (!filp) { 4615f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4616f9d7562fSJ. Bruce Fields goto out; 4617f9d7562fSJ. Bruce Fields } 461821179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 461921179d81SJeff Layton file_lock->fl_pid = current->tgid; 462021179d81SJeff Layton file_lock->fl_file = filp; 462121179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 462221179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 462321179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 462421179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 462521179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 46261da177e4SLinus Torvalds 462721179d81SJeff Layton conflock = locks_alloc_lock(); 462821179d81SJeff Layton if (!conflock) { 462921179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 463021179d81SJeff Layton status = nfserr_jukebox; 463121179d81SJeff Layton goto out; 463221179d81SJeff Layton } 46331da177e4SLinus Torvalds 463421179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4635b8dd7b9aSAl Viro switch (-err) { 46361da177e4SLinus Torvalds case 0: /* success! */ 4637dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4638dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 46391da177e4SLinus Torvalds sizeof(stateid_t)); 4640b8dd7b9aSAl Viro status = 0; 4641eb76b3fdSAndy Adamson break; 4642eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4643eb76b3fdSAndy Adamson status = nfserr_denied; 4644eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 464521179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4646eb76b3fdSAndy Adamson break; 46471da177e4SLinus Torvalds case (EDEADLK): 46481da177e4SLinus Torvalds status = nfserr_deadlock; 4649eb76b3fdSAndy Adamson break; 46501da177e4SLinus Torvalds default: 4651fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 46523e772463SJ. Bruce Fields status = nfserrno(err); 4653eb76b3fdSAndy Adamson break; 46541da177e4SLinus Torvalds } 46551da177e4SLinus Torvalds out: 465664a284d0SJ. Bruce Fields if (status && new_state) 4657c53530daSJeff Layton release_lock_stateid(lock_stp); 46589411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 46595ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 46601da177e4SLinus Torvalds nfs4_unlock_state(); 466121179d81SJeff Layton if (file_lock) 466221179d81SJeff Layton locks_free_lock(file_lock); 466321179d81SJeff Layton if (conflock) 466421179d81SJeff Layton locks_free_lock(conflock); 46651da177e4SLinus Torvalds return status; 46661da177e4SLinus Torvalds } 46671da177e4SLinus Torvalds 46681da177e4SLinus Torvalds /* 466955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 467055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 467155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 467255ef1274SJ. Bruce Fields * inode operation.) 467355ef1274SJ. Bruce Fields */ 467404da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 467555ef1274SJ. Bruce Fields { 467655ef1274SJ. Bruce Fields struct file *file; 467704da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 467804da6e9dSAl Viro if (!err) { 467904da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 468055ef1274SJ. Bruce Fields nfsd_close(file); 468104da6e9dSAl Viro } 468255ef1274SJ. Bruce Fields return err; 468355ef1274SJ. Bruce Fields } 468455ef1274SJ. Bruce Fields 468555ef1274SJ. Bruce Fields /* 46861da177e4SLinus Torvalds * LOCKT operation 46871da177e4SLinus Torvalds */ 4688b37ad28bSAl Viro __be32 4689ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4690ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 46911da177e4SLinus Torvalds { 469221179d81SJeff Layton struct file_lock *file_lock = NULL; 4693fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4694b37ad28bSAl Viro __be32 status; 46957f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 46961da177e4SLinus Torvalds 46975ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 46981da177e4SLinus Torvalds return nfserr_grace; 46991da177e4SLinus Torvalds 47001da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 47011da177e4SLinus Torvalds return nfserr_inval; 47021da177e4SLinus Torvalds 47031da177e4SLinus Torvalds nfs4_lock_state(); 47041da177e4SLinus Torvalds 47059b2ef62bSJ. Bruce Fields if (!nfsd4_has_session(cstate)) { 47064b24ca7dSJeff Layton status = lookup_clientid(&lockt->lt_clientid, cstate, nn); 47079b2ef62bSJ. Bruce Fields if (status) 47081da177e4SLinus Torvalds goto out; 47099b2ef62bSJ. Bruce Fields } 47101da177e4SLinus Torvalds 471175c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 47121da177e4SLinus Torvalds goto out; 47131da177e4SLinus Torvalds 471421179d81SJeff Layton file_lock = locks_alloc_lock(); 471521179d81SJeff Layton if (!file_lock) { 471621179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 471721179d81SJeff Layton status = nfserr_jukebox; 471821179d81SJeff Layton goto out; 471921179d81SJeff Layton } 472021179d81SJeff Layton locks_init_lock(file_lock); 47211da177e4SLinus Torvalds switch (lockt->lt_type) { 47221da177e4SLinus Torvalds case NFS4_READ_LT: 47231da177e4SLinus Torvalds case NFS4_READW_LT: 472421179d81SJeff Layton file_lock->fl_type = F_RDLCK; 47251da177e4SLinus Torvalds break; 47261da177e4SLinus Torvalds case NFS4_WRITE_LT: 47271da177e4SLinus Torvalds case NFS4_WRITEW_LT: 472821179d81SJeff Layton file_lock->fl_type = F_WRLCK; 47291da177e4SLinus Torvalds break; 47301da177e4SLinus Torvalds default: 47312fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 47321da177e4SLinus Torvalds status = nfserr_inval; 47331da177e4SLinus Torvalds goto out; 47341da177e4SLinus Torvalds } 47351da177e4SLinus Torvalds 4736b3c32bcdSTrond Myklebust lo = find_lockowner_str(&lockt->lt_clientid, &lockt->lt_owner, nn); 4737fe0750e5SJ. Bruce Fields if (lo) 473821179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 473921179d81SJeff Layton file_lock->fl_pid = current->tgid; 474021179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 47411da177e4SLinus Torvalds 474221179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 474321179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 47441da177e4SLinus Torvalds 474521179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 47461da177e4SLinus Torvalds 474721179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 474804da6e9dSAl Viro if (status) 4749fd85b817SMarc Eshel goto out; 475004da6e9dSAl Viro 475121179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 47521da177e4SLinus Torvalds status = nfserr_denied; 475321179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 47541da177e4SLinus Torvalds } 47551da177e4SLinus Torvalds out: 47561da177e4SLinus Torvalds nfs4_unlock_state(); 475721179d81SJeff Layton if (file_lock) 475821179d81SJeff Layton locks_free_lock(file_lock); 47591da177e4SLinus Torvalds return status; 47601da177e4SLinus Torvalds } 47611da177e4SLinus Torvalds 4762b37ad28bSAl Viro __be32 4763ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4764a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 47651da177e4SLinus Torvalds { 4766dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 47671da177e4SLinus Torvalds struct file *filp = NULL; 476821179d81SJeff Layton struct file_lock *file_lock = NULL; 4769b37ad28bSAl Viro __be32 status; 4770b8dd7b9aSAl Viro int err; 47713320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 47721da177e4SLinus Torvalds 47731da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 47741da177e4SLinus Torvalds (long long) locku->lu_offset, 47751da177e4SLinus Torvalds (long long) locku->lu_length); 47761da177e4SLinus Torvalds 47771da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 47781da177e4SLinus Torvalds return nfserr_inval; 47791da177e4SLinus Torvalds 47801da177e4SLinus Torvalds nfs4_lock_state(); 47811da177e4SLinus Torvalds 47829072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 47833320fef1SStanislav Kinsbursky &locku->lu_stateid, NFS4_LOCK_STID, 47843320fef1SStanislav Kinsbursky &stp, nn); 47859072d5c6SJ. Bruce Fields if (status) 47861da177e4SLinus Torvalds goto out; 4787f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4788f9d7562fSJ. Bruce Fields if (!filp) { 4789f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4790f9d7562fSJ. Bruce Fields goto out; 4791f9d7562fSJ. Bruce Fields } 479221179d81SJeff Layton file_lock = locks_alloc_lock(); 479321179d81SJeff Layton if (!file_lock) { 479421179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 479521179d81SJeff Layton status = nfserr_jukebox; 479621179d81SJeff Layton goto out; 479721179d81SJeff Layton } 479821179d81SJeff Layton locks_init_lock(file_lock); 479921179d81SJeff Layton file_lock->fl_type = F_UNLCK; 48000a262ffbSJ. Bruce Fields file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 480121179d81SJeff Layton file_lock->fl_pid = current->tgid; 480221179d81SJeff Layton file_lock->fl_file = filp; 480321179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 480421179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 480521179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 48061da177e4SLinus Torvalds 480721179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 480821179d81SJeff Layton locku->lu_length); 480921179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 48101da177e4SLinus Torvalds 481121179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4812b8dd7b9aSAl Viro if (err) { 4813fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 48141da177e4SLinus Torvalds goto out_nfserr; 48151da177e4SLinus Torvalds } 4816dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4817dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 48181da177e4SLinus Torvalds 48191da177e4SLinus Torvalds out: 48209411b1d4SJ. Bruce Fields nfsd4_bump_seqid(cstate, status); 482171c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 48221da177e4SLinus Torvalds nfs4_unlock_state(); 482321179d81SJeff Layton if (file_lock) 482421179d81SJeff Layton locks_free_lock(file_lock); 48251da177e4SLinus Torvalds return status; 48261da177e4SLinus Torvalds 48271da177e4SLinus Torvalds out_nfserr: 4828b8dd7b9aSAl Viro status = nfserrno(err); 48291da177e4SLinus Torvalds goto out; 48301da177e4SLinus Torvalds } 48311da177e4SLinus Torvalds 48321da177e4SLinus Torvalds /* 48331da177e4SLinus Torvalds * returns 48341da177e4SLinus Torvalds * 1: locks held by lockowner 48351da177e4SLinus Torvalds * 0: no locks held by lockowner 48361da177e4SLinus Torvalds */ 48371da177e4SLinus Torvalds static int 4838fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 48391da177e4SLinus Torvalds { 48401da177e4SLinus Torvalds struct file_lock **flpp; 4841f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 48421da177e4SLinus Torvalds int status = 0; 48431da177e4SLinus Torvalds 48441c8c601aSJeff Layton spin_lock(&inode->i_lock); 48451da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4846796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 48471da177e4SLinus Torvalds status = 1; 48481da177e4SLinus Torvalds goto out; 48491da177e4SLinus Torvalds } 4850796dadfdSJ. Bruce Fields } 48511da177e4SLinus Torvalds out: 48521c8c601aSJeff Layton spin_unlock(&inode->i_lock); 48531da177e4SLinus Torvalds return status; 48541da177e4SLinus Torvalds } 48551da177e4SLinus Torvalds 4856b37ad28bSAl Viro __be32 4857b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4858b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4859b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 48601da177e4SLinus Torvalds { 48611da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 4862fd44907cSJeff Layton struct nfs4_stateowner *sop = NULL, *tmp; 4863fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4864dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 48651da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 486616bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4867b37ad28bSAl Viro __be32 status; 48687f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 48691da177e4SLinus Torvalds 48701da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 48711da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 48721da177e4SLinus Torvalds 48731da177e4SLinus Torvalds nfs4_lock_state(); 48741da177e4SLinus Torvalds 48754b24ca7dSJeff Layton status = lookup_clientid(clid, cstate, nn); 48769b2ef62bSJ. Bruce Fields if (status) 48779b2ef62bSJ. Bruce Fields goto out; 48789b2ef62bSJ. Bruce Fields 48791da177e4SLinus Torvalds status = nfserr_locks_held; 488006f1f864SJ. Bruce Fields 4881fd44907cSJeff Layton /* Find the matching lock stateowner */ 4882fd44907cSJeff Layton list_for_each_entry(tmp, &nn->ownerstr_hashtbl[hashval], so_strhash) { 4883fd44907cSJeff Layton if (tmp->so_is_open_owner) 488416bfdaafSJ. Bruce Fields continue; 4885fd44907cSJeff Layton if (same_owner_str(tmp, owner, clid)) { 4886fd44907cSJeff Layton sop = tmp; 4887fd44907cSJeff Layton break; 4888fd44907cSJeff Layton } 4889fd44907cSJeff Layton } 4890fd44907cSJeff Layton 4891fd44907cSJeff Layton /* No matching owner found, maybe a replay? Just declare victory... */ 4892fd44907cSJeff Layton if (!sop) { 4893fd44907cSJeff Layton status = nfs_ok; 4894fd44907cSJeff Layton goto out; 4895fd44907cSJeff Layton } 4896fd44907cSJeff Layton 4897fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4898fd44907cSJeff Layton /* see if there are still any locks associated with it */ 4899fd44907cSJeff Layton list_for_each_entry(stp, &sop->so_stateids, st_perstateowner) { 4900fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 49011da177e4SLinus Torvalds goto out; 49021da177e4SLinus Torvalds } 4903fd44907cSJeff Layton 49041da177e4SLinus Torvalds status = nfs_ok; 4905fe0750e5SJ. Bruce Fields release_lockowner(lo); 49061da177e4SLinus Torvalds out: 49071da177e4SLinus Torvalds nfs4_unlock_state(); 49081da177e4SLinus Torvalds return status; 49091da177e4SLinus Torvalds } 49101da177e4SLinus Torvalds 49111da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4912a55370a3SNeilBrown alloc_reclaim(void) 49131da177e4SLinus Torvalds { 4914a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 49151da177e4SLinus Torvalds } 49161da177e4SLinus Torvalds 49170ce0c2b5SJeff Layton bool 491852e19c09SStanislav Kinsbursky nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) 4919c7b9a459SNeilBrown { 49200ce0c2b5SJeff Layton struct nfs4_client_reclaim *crp; 4921c7b9a459SNeilBrown 492252e19c09SStanislav Kinsbursky crp = nfsd4_find_reclaim_client(name, nn); 49230ce0c2b5SJeff Layton return (crp && crp->cr_clp); 4924c7b9a459SNeilBrown } 4925c7b9a459SNeilBrown 49261da177e4SLinus Torvalds /* 49271da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 49281da177e4SLinus Torvalds */ 4929772a9bbbSJeff Layton struct nfs4_client_reclaim * 493052e19c09SStanislav Kinsbursky nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) 49311da177e4SLinus Torvalds { 49321da177e4SLinus Torvalds unsigned int strhashval; 4933772a9bbbSJeff Layton struct nfs4_client_reclaim *crp; 49341da177e4SLinus Torvalds 4935a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4936a55370a3SNeilBrown crp = alloc_reclaim(); 4937772a9bbbSJeff Layton if (crp) { 4938a55370a3SNeilBrown strhashval = clientstr_hashval(name); 49391da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 494052e19c09SStanislav Kinsbursky list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); 4941a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 49420ce0c2b5SJeff Layton crp->cr_clp = NULL; 494352e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size++; 4944772a9bbbSJeff Layton } 4945772a9bbbSJeff Layton return crp; 49461da177e4SLinus Torvalds } 49471da177e4SLinus Torvalds 49482a4317c5SJeff Layton void 494952e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) 4950ce30e539SJeff Layton { 4951ce30e539SJeff Layton list_del(&crp->cr_strhash); 4952ce30e539SJeff Layton kfree(crp); 495352e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size--; 4954ce30e539SJeff Layton } 4955ce30e539SJeff Layton 4956ce30e539SJeff Layton void 495752e19c09SStanislav Kinsbursky nfs4_release_reclaim(struct nfsd_net *nn) 49581da177e4SLinus Torvalds { 49591da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 49601da177e4SLinus Torvalds int i; 49611da177e4SLinus Torvalds 49621da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 496352e19c09SStanislav Kinsbursky while (!list_empty(&nn->reclaim_str_hashtbl[i])) { 496452e19c09SStanislav Kinsbursky crp = list_entry(nn->reclaim_str_hashtbl[i].next, 49651da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 496652e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(crp, nn); 49671da177e4SLinus Torvalds } 49681da177e4SLinus Torvalds } 4969063b0fb9SJ. Bruce Fields WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); 49701da177e4SLinus Torvalds } 49711da177e4SLinus Torvalds 49721da177e4SLinus Torvalds /* 49731da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 49742a4317c5SJeff Layton struct nfs4_client_reclaim * 497552e19c09SStanislav Kinsbursky nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) 49761da177e4SLinus Torvalds { 49771da177e4SLinus Torvalds unsigned int strhashval; 49781da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 49791da177e4SLinus Torvalds 4980278c931cSJeff Layton dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); 49811da177e4SLinus Torvalds 4982278c931cSJeff Layton strhashval = clientstr_hashval(recdir); 498352e19c09SStanislav Kinsbursky list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { 4984278c931cSJeff Layton if (same_name(crp->cr_recdir, recdir)) { 49851da177e4SLinus Torvalds return crp; 49861da177e4SLinus Torvalds } 49871da177e4SLinus Torvalds } 49881da177e4SLinus Torvalds return NULL; 49891da177e4SLinus Torvalds } 49901da177e4SLinus Torvalds 49911da177e4SLinus Torvalds /* 49921da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 49931da177e4SLinus Torvalds */ 4994b37ad28bSAl Viro __be32 49950fe492dbSTrond Myklebust nfs4_check_open_reclaim(clientid_t *clid, 49960fe492dbSTrond Myklebust struct nfsd4_compound_state *cstate, 49970fe492dbSTrond Myklebust struct nfsd_net *nn) 49981da177e4SLinus Torvalds { 49990fe492dbSTrond Myklebust __be32 status; 5000a52d726bSJeff Layton 5001a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 50020fe492dbSTrond Myklebust status = lookup_clientid(clid, cstate, nn); 50030fe492dbSTrond Myklebust if (status) 5004a52d726bSJeff Layton return nfserr_reclaim_bad; 5005a52d726bSJeff Layton 50060fe492dbSTrond Myklebust if (nfsd4_client_record_check(cstate->clp)) 50070fe492dbSTrond Myklebust return nfserr_reclaim_bad; 50080fe492dbSTrond Myklebust 50090fe492dbSTrond Myklebust return nfs_ok; 50101da177e4SLinus Torvalds } 50111da177e4SLinus Torvalds 501265178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 501365178db4SBryan Schumaker 501444e34da6SBryan Schumaker u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) 501544e34da6SBryan Schumaker { 5016221a6876SJ. Bruce Fields if (mark_client_expired(clp)) 5017221a6876SJ. Bruce Fields return 0; 501844e34da6SBryan Schumaker expire_client(clp); 501944e34da6SBryan Schumaker return 1; 502044e34da6SBryan Schumaker } 502144e34da6SBryan Schumaker 5022184c1847SBryan Schumaker u64 nfsd_print_client(struct nfs4_client *clp, u64 num) 5023184c1847SBryan Schumaker { 5024184c1847SBryan Schumaker char buf[INET6_ADDRSTRLEN]; 50250a5c33e2SBryan Schumaker rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); 5026184c1847SBryan Schumaker printk(KERN_INFO "NFS Client: %s\n", buf); 5027184c1847SBryan Schumaker return 1; 5028184c1847SBryan Schumaker } 5029184c1847SBryan Schumaker 5030184c1847SBryan Schumaker static void nfsd_print_count(struct nfs4_client *clp, unsigned int count, 5031184c1847SBryan Schumaker const char *type) 5032184c1847SBryan Schumaker { 5033184c1847SBryan Schumaker char buf[INET6_ADDRSTRLEN]; 50340a5c33e2SBryan Schumaker rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf)); 5035184c1847SBryan Schumaker printk(KERN_INFO "NFS Client: %s has %u %s\n", buf, count, type); 5036184c1847SBryan Schumaker } 5037184c1847SBryan Schumaker 50383c87b9b7STrond Myklebust static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, 50393c87b9b7STrond Myklebust void (*func)(struct nfs4_ol_stateid *)) 5040fc29171fSBryan Schumaker { 5041fc29171fSBryan Schumaker struct nfs4_openowner *oop; 5042fc29171fSBryan Schumaker struct nfs4_ol_stateid *stp, *st_next; 50433c87b9b7STrond Myklebust struct nfs4_ol_stateid *lst, *lst_next; 5044fc29171fSBryan Schumaker u64 count = 0; 5045fc29171fSBryan Schumaker 5046fc29171fSBryan Schumaker list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { 50473c87b9b7STrond Myklebust list_for_each_entry_safe(stp, st_next, 50483c87b9b7STrond Myklebust &oop->oo_owner.so_stateids, st_perstateowner) { 50493c87b9b7STrond Myklebust list_for_each_entry_safe(lst, lst_next, 50503c87b9b7STrond Myklebust &stp->st_locks, st_locks) { 5051fc29171fSBryan Schumaker if (func) 50523c87b9b7STrond Myklebust func(lst); 5053fc29171fSBryan Schumaker if (++count == max) 5054fc29171fSBryan Schumaker return count; 5055fc29171fSBryan Schumaker } 5056fc29171fSBryan Schumaker } 5057fc29171fSBryan Schumaker } 5058fc29171fSBryan Schumaker 5059fc29171fSBryan Schumaker return count; 5060fc29171fSBryan Schumaker } 5061fc29171fSBryan Schumaker 5062fc29171fSBryan Schumaker u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) 5063fc29171fSBryan Schumaker { 50643c87b9b7STrond Myklebust return nfsd_foreach_client_lock(clp, max, release_lock_stateid); 5065fc29171fSBryan Schumaker } 5066fc29171fSBryan Schumaker 5067184c1847SBryan Schumaker u64 nfsd_print_client_locks(struct nfs4_client *clp, u64 max) 5068184c1847SBryan Schumaker { 5069184c1847SBryan Schumaker u64 count = nfsd_foreach_client_lock(clp, max, NULL); 5070184c1847SBryan Schumaker nfsd_print_count(clp, count, "locked files"); 5071184c1847SBryan Schumaker return count; 5072184c1847SBryan Schumaker } 5073184c1847SBryan Schumaker 50744dbdbda8SBryan Schumaker static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) 50754dbdbda8SBryan Schumaker { 50764dbdbda8SBryan Schumaker struct nfs4_openowner *oop, *next; 50774dbdbda8SBryan Schumaker u64 count = 0; 50784dbdbda8SBryan Schumaker 50794dbdbda8SBryan Schumaker list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { 50804dbdbda8SBryan Schumaker if (func) 50814dbdbda8SBryan Schumaker func(oop); 50824dbdbda8SBryan Schumaker if (++count == max) 50834dbdbda8SBryan Schumaker break; 50844dbdbda8SBryan Schumaker } 50854dbdbda8SBryan Schumaker 50864dbdbda8SBryan Schumaker return count; 50874dbdbda8SBryan Schumaker } 50884dbdbda8SBryan Schumaker 50894dbdbda8SBryan Schumaker u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) 50904dbdbda8SBryan Schumaker { 50914dbdbda8SBryan Schumaker return nfsd_foreach_client_open(clp, max, release_openowner); 50924dbdbda8SBryan Schumaker } 50934dbdbda8SBryan Schumaker 5094184c1847SBryan Schumaker u64 nfsd_print_client_openowners(struct nfs4_client *clp, u64 max) 5095184c1847SBryan Schumaker { 5096184c1847SBryan Schumaker u64 count = nfsd_foreach_client_open(clp, max, NULL); 5097184c1847SBryan Schumaker nfsd_print_count(clp, count, "open files"); 5098184c1847SBryan Schumaker return count; 5099184c1847SBryan Schumaker } 5100184c1847SBryan Schumaker 5101269de30fSBryan Schumaker static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max, 5102269de30fSBryan Schumaker struct list_head *victims) 5103269de30fSBryan Schumaker { 5104269de30fSBryan Schumaker struct nfs4_delegation *dp, *next; 5105269de30fSBryan Schumaker u64 count = 0; 5106269de30fSBryan Schumaker 5107cdc97505SBenny Halevy lockdep_assert_held(&state_lock); 5108269de30fSBryan Schumaker list_for_each_entry_safe(dp, next, &clp->cl_delegations, dl_perclnt) { 5109dff1399fSJeff Layton if (victims) { 5110dff1399fSJeff Layton /* 5111dff1399fSJeff Layton * It's not safe to mess with delegations that have a 5112dff1399fSJeff Layton * non-zero dl_time. They might have already been broken 5113dff1399fSJeff Layton * and could be processed by the laundromat outside of 5114dff1399fSJeff Layton * the state_lock. Just leave them be. 5115dff1399fSJeff Layton */ 5116dff1399fSJeff Layton if (dp->dl_time != 0) 5117dff1399fSJeff Layton continue; 5118dff1399fSJeff Layton 5119dff1399fSJeff Layton /* 5120dff1399fSJeff Layton * Increment dl_time to ensure that delegation breaks 5121dff1399fSJeff Layton * don't monkey with it now that we are. 5122dff1399fSJeff Layton */ 5123dff1399fSJeff Layton ++dp->dl_time; 5124269de30fSBryan Schumaker list_move(&dp->dl_recall_lru, victims); 5125dff1399fSJeff Layton } 5126269de30fSBryan Schumaker if (++count == max) 5127269de30fSBryan Schumaker break; 5128269de30fSBryan Schumaker } 5129269de30fSBryan Schumaker return count; 5130269de30fSBryan Schumaker } 5131269de30fSBryan Schumaker 5132269de30fSBryan Schumaker u64 nfsd_forget_client_delegations(struct nfs4_client *clp, u64 max) 5133269de30fSBryan Schumaker { 5134269de30fSBryan Schumaker struct nfs4_delegation *dp, *next; 5135269de30fSBryan Schumaker LIST_HEAD(victims); 5136269de30fSBryan Schumaker u64 count; 5137269de30fSBryan Schumaker 5138cdc97505SBenny Halevy spin_lock(&state_lock); 5139269de30fSBryan Schumaker count = nfsd_find_all_delegations(clp, max, &victims); 5140cdc97505SBenny Halevy spin_unlock(&state_lock); 5141269de30fSBryan Schumaker 5142269de30fSBryan Schumaker list_for_each_entry_safe(dp, next, &victims, dl_recall_lru) 51433bd64a5bSJ. Bruce Fields revoke_delegation(dp); 5144269de30fSBryan Schumaker 5145269de30fSBryan Schumaker return count; 5146269de30fSBryan Schumaker } 5147269de30fSBryan Schumaker 5148269de30fSBryan Schumaker u64 nfsd_recall_client_delegations(struct nfs4_client *clp, u64 max) 5149269de30fSBryan Schumaker { 5150dff1399fSJeff Layton struct nfs4_delegation *dp; 5151269de30fSBryan Schumaker LIST_HEAD(victims); 5152269de30fSBryan Schumaker u64 count; 5153269de30fSBryan Schumaker 5154cdc97505SBenny Halevy spin_lock(&state_lock); 5155269de30fSBryan Schumaker count = nfsd_find_all_delegations(clp, max, &victims); 5156dff1399fSJeff Layton while (!list_empty(&victims)) { 5157dff1399fSJeff Layton dp = list_first_entry(&victims, struct nfs4_delegation, 5158dff1399fSJeff Layton dl_recall_lru); 5159dff1399fSJeff Layton list_del_init(&dp->dl_recall_lru); 5160dff1399fSJeff Layton dp->dl_time = 0; 5161269de30fSBryan Schumaker nfsd_break_one_deleg(dp); 5162dff1399fSJeff Layton } 5163cdc97505SBenny Halevy spin_unlock(&state_lock); 5164269de30fSBryan Schumaker 5165269de30fSBryan Schumaker return count; 5166269de30fSBryan Schumaker } 5167269de30fSBryan Schumaker 5168184c1847SBryan Schumaker u64 nfsd_print_client_delegations(struct nfs4_client *clp, u64 max) 5169184c1847SBryan Schumaker { 5170184c1847SBryan Schumaker u64 count = 0; 5171184c1847SBryan Schumaker 5172cdc97505SBenny Halevy spin_lock(&state_lock); 5173184c1847SBryan Schumaker count = nfsd_find_all_delegations(clp, max, NULL); 5174cdc97505SBenny Halevy spin_unlock(&state_lock); 5175184c1847SBryan Schumaker 5176184c1847SBryan Schumaker nfsd_print_count(clp, count, "delegations"); 5177184c1847SBryan Schumaker return count; 5178184c1847SBryan Schumaker } 5179184c1847SBryan Schumaker 518044e34da6SBryan Schumaker u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) 518165178db4SBryan Schumaker { 518265178db4SBryan Schumaker struct nfs4_client *clp, *next; 518344e34da6SBryan Schumaker u64 count = 0; 51843320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); 518565178db4SBryan Schumaker 518644e34da6SBryan Schumaker if (!nfsd_netns_ready(nn)) 518744e34da6SBryan Schumaker return 0; 518844e34da6SBryan Schumaker 51895ed58bb2SStanislav Kinsbursky list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { 519044e34da6SBryan Schumaker count += func(clp, max - count); 519144e34da6SBryan Schumaker if ((max != 0) && (count >= max)) 519265178db4SBryan Schumaker break; 519365178db4SBryan Schumaker } 519465178db4SBryan Schumaker 519544e34da6SBryan Schumaker return count; 519644e34da6SBryan Schumaker } 519744e34da6SBryan Schumaker 51986c1e82a4SBryan Schumaker struct nfs4_client *nfsd_find_client(struct sockaddr_storage *addr, size_t addr_size) 51996c1e82a4SBryan Schumaker { 52006c1e82a4SBryan Schumaker struct nfs4_client *clp; 52016c1e82a4SBryan Schumaker struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); 52026c1e82a4SBryan Schumaker 52036c1e82a4SBryan Schumaker if (!nfsd_netns_ready(nn)) 52046c1e82a4SBryan Schumaker return NULL; 52056c1e82a4SBryan Schumaker 52066c1e82a4SBryan Schumaker list_for_each_entry(clp, &nn->client_lru, cl_lru) { 52076c1e82a4SBryan Schumaker if (memcmp(&clp->cl_addr, addr, addr_size) == 0) 52086c1e82a4SBryan Schumaker return clp; 52096c1e82a4SBryan Schumaker } 52106c1e82a4SBryan Schumaker return NULL; 52116c1e82a4SBryan Schumaker } 52126c1e82a4SBryan Schumaker 521365178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 521465178db4SBryan Schumaker 5215c2f1a551SMeelap Shah /* 5216c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 5217c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 5218c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 5219c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 5220c2f1a551SMeelap Shah * 5221c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 5222c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 5223c2f1a551SMeelap Shah */ 5224c2f1a551SMeelap Shah static void 5225c2f1a551SMeelap Shah set_max_delegations(void) 5226c2f1a551SMeelap Shah { 5227c2f1a551SMeelap Shah /* 5228c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 5229c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 5230c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 5231c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 5232c2f1a551SMeelap Shah */ 5233c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 5234c2f1a551SMeelap Shah } 5235c2f1a551SMeelap Shah 5236d85ed443SStanislav Kinsbursky static int nfs4_state_create_net(struct net *net) 52378daae4dcSStanislav Kinsbursky { 52388daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 52398daae4dcSStanislav Kinsbursky int i; 52408daae4dcSStanislav Kinsbursky 52418daae4dcSStanislav Kinsbursky nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * 52428daae4dcSStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 52438daae4dcSStanislav Kinsbursky if (!nn->conf_id_hashtbl) 5244382a62e7SStanislav Kinsbursky goto err; 52450a7ec377SStanislav Kinsbursky nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * 52460a7ec377SStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 52470a7ec377SStanislav Kinsbursky if (!nn->unconf_id_hashtbl) 52480a7ec377SStanislav Kinsbursky goto err_unconf_id; 52499b531137SStanislav Kinsbursky nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * 52509b531137SStanislav Kinsbursky OWNER_HASH_SIZE, GFP_KERNEL); 52519b531137SStanislav Kinsbursky if (!nn->ownerstr_hashtbl) 52529b531137SStanislav Kinsbursky goto err_ownerstr; 52531872de0eSStanislav Kinsbursky nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * 52541872de0eSStanislav Kinsbursky SESSION_HASH_SIZE, GFP_KERNEL); 52551872de0eSStanislav Kinsbursky if (!nn->sessionid_hashtbl) 52561872de0eSStanislav Kinsbursky goto err_sessionid; 52578daae4dcSStanislav Kinsbursky 5258382a62e7SStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 52598daae4dcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); 52600a7ec377SStanislav Kinsbursky INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); 5261382a62e7SStanislav Kinsbursky } 52629b531137SStanislav Kinsbursky for (i = 0; i < OWNER_HASH_SIZE; i++) 52639b531137SStanislav Kinsbursky INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); 52641872de0eSStanislav Kinsbursky for (i = 0; i < SESSION_HASH_SIZE; i++) 52651872de0eSStanislav Kinsbursky INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); 5266382a62e7SStanislav Kinsbursky nn->conf_name_tree = RB_ROOT; 5267a99454aaSStanislav Kinsbursky nn->unconf_name_tree = RB_ROOT; 52685ed58bb2SStanislav Kinsbursky INIT_LIST_HEAD(&nn->client_lru); 526973758fedSStanislav Kinsbursky INIT_LIST_HEAD(&nn->close_lru); 5270e8c69d17SJ. Bruce Fields INIT_LIST_HEAD(&nn->del_recall_lru); 5271c9a49628SStanislav Kinsbursky spin_lock_init(&nn->client_lock); 52728daae4dcSStanislav Kinsbursky 527309121281SStanislav Kinsbursky INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); 5274d85ed443SStanislav Kinsbursky get_net(net); 527509121281SStanislav Kinsbursky 52768daae4dcSStanislav Kinsbursky return 0; 5277382a62e7SStanislav Kinsbursky 52781872de0eSStanislav Kinsbursky err_sessionid: 527920e9e2bcSStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 52809b531137SStanislav Kinsbursky err_ownerstr: 52819b531137SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 52820a7ec377SStanislav Kinsbursky err_unconf_id: 52830a7ec377SStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 5284382a62e7SStanislav Kinsbursky err: 5285382a62e7SStanislav Kinsbursky return -ENOMEM; 52868daae4dcSStanislav Kinsbursky } 52878daae4dcSStanislav Kinsbursky 52888daae4dcSStanislav Kinsbursky static void 52894dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(struct net *net) 52908daae4dcSStanislav Kinsbursky { 52918daae4dcSStanislav Kinsbursky int i; 52928daae4dcSStanislav Kinsbursky struct nfs4_client *clp = NULL; 52938daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 52948daae4dcSStanislav Kinsbursky 52958daae4dcSStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 52968daae4dcSStanislav Kinsbursky while (!list_empty(&nn->conf_id_hashtbl[i])) { 52978daae4dcSStanislav Kinsbursky clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 52988daae4dcSStanislav Kinsbursky destroy_client(clp); 52998daae4dcSStanislav Kinsbursky } 53008daae4dcSStanislav Kinsbursky } 5301a99454aaSStanislav Kinsbursky 53022b905635SKinglong Mee for (i = 0; i < CLIENT_HASH_SIZE; i++) { 53032b905635SKinglong Mee while (!list_empty(&nn->unconf_id_hashtbl[i])) { 53042b905635SKinglong Mee clp = list_entry(nn->unconf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 5305a99454aaSStanislav Kinsbursky destroy_client(clp); 5306a99454aaSStanislav Kinsbursky } 53072b905635SKinglong Mee } 5308a99454aaSStanislav Kinsbursky 53091872de0eSStanislav Kinsbursky kfree(nn->sessionid_hashtbl); 53109b531137SStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 53110a7ec377SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 53128daae4dcSStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 53134dce0ac9SStanislav Kinsbursky put_net(net); 53148daae4dcSStanislav Kinsbursky } 53158daae4dcSStanislav Kinsbursky 5316f252bc68SStanislav Kinsbursky int 5317d85ed443SStanislav Kinsbursky nfs4_state_start_net(struct net *net) 5318ac4d8ff2SNeilBrown { 53195e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 5320b5a1a81eSJ. Bruce Fields int ret; 5321b5a1a81eSJ. Bruce Fields 5322d85ed443SStanislav Kinsbursky ret = nfs4_state_create_net(net); 53238daae4dcSStanislav Kinsbursky if (ret) 53248daae4dcSStanislav Kinsbursky return ret; 53255e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 53262c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 53275ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 5328a51c84edSStanislav Kinsbursky nn->grace_ended = false; 5329d85ed443SStanislav Kinsbursky printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", 53305284b44eSStanislav Kinsbursky nn->nfsd4_grace, net); 53315284b44eSStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); 5332d85ed443SStanislav Kinsbursky return 0; 5333a6d6b781SJeff Layton } 5334d85ed443SStanislav Kinsbursky 5335d85ed443SStanislav Kinsbursky /* initialization to perform when the nfsd service is started: */ 5336d85ed443SStanislav Kinsbursky 5337d85ed443SStanislav Kinsbursky int 5338d85ed443SStanislav Kinsbursky nfs4_state_start(void) 5339d85ed443SStanislav Kinsbursky { 5340d85ed443SStanislav Kinsbursky int ret; 5341d85ed443SStanislav Kinsbursky 5342d85ed443SStanislav Kinsbursky ret = set_callback_cred(); 5343d85ed443SStanislav Kinsbursky if (ret) 5344d85ed443SStanislav Kinsbursky return -ENOMEM; 534558da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 5346a6d6b781SJeff Layton if (laundry_wq == NULL) { 5347a6d6b781SJeff Layton ret = -ENOMEM; 5348a6d6b781SJeff Layton goto out_recovery; 5349a6d6b781SJeff Layton } 5350b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 5351b5a1a81eSJ. Bruce Fields if (ret) 5352b5a1a81eSJ. Bruce Fields goto out_free_laundry; 535309121281SStanislav Kinsbursky 5354c2f1a551SMeelap Shah set_max_delegations(); 5355d85ed443SStanislav Kinsbursky 5356b5a1a81eSJ. Bruce Fields return 0; 5357d85ed443SStanislav Kinsbursky 5358b5a1a81eSJ. Bruce Fields out_free_laundry: 5359b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 5360a6d6b781SJeff Layton out_recovery: 5361b5a1a81eSJ. Bruce Fields return ret; 53621da177e4SLinus Torvalds } 53631da177e4SLinus Torvalds 5364f252bc68SStanislav Kinsbursky void 53654dce0ac9SStanislav Kinsbursky nfs4_state_shutdown_net(struct net *net) 53661da177e4SLinus Torvalds { 53671da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 53681da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 53694dce0ac9SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 53701da177e4SLinus Torvalds 53714dce0ac9SStanislav Kinsbursky cancel_delayed_work_sync(&nn->laundromat_work); 53724dce0ac9SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 5373ac55fdc4SJeff Layton 5374e50a26dcSJ. Bruce Fields nfs4_lock_state(); 53751da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 5376cdc97505SBenny Halevy spin_lock(&state_lock); 5377e8c69d17SJ. Bruce Fields list_for_each_safe(pos, next, &nn->del_recall_lru) { 53781da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 53791da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 53801da177e4SLinus Torvalds } 5381cdc97505SBenny Halevy spin_unlock(&state_lock); 53821da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 53831da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 53843bd64a5bSJ. Bruce Fields destroy_delegation(dp); 53851da177e4SLinus Torvalds } 53861da177e4SLinus Torvalds 53873320fef1SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 53884dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(net); 5389e50a26dcSJ. Bruce Fields nfs4_unlock_state(); 53901da177e4SLinus Torvalds } 53911da177e4SLinus Torvalds 53921da177e4SLinus Torvalds void 53931da177e4SLinus Torvalds nfs4_state_shutdown(void) 53941da177e4SLinus Torvalds { 53955e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 5396c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 53971da177e4SLinus Torvalds } 53988b70484cSTigran Mkrtchyan 53998b70484cSTigran Mkrtchyan static void 54008b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 54018b70484cSTigran Mkrtchyan { 540237c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 540337c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 54048b70484cSTigran Mkrtchyan } 54058b70484cSTigran Mkrtchyan 54068b70484cSTigran Mkrtchyan static void 54078b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 54088b70484cSTigran Mkrtchyan { 540937c593c5STigran Mkrtchyan if (cstate->minorversion) { 541037c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 541137c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 541237c593c5STigran Mkrtchyan } 541337c593c5STigran Mkrtchyan } 541437c593c5STigran Mkrtchyan 541537c593c5STigran Mkrtchyan void 541637c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 541737c593c5STigran Mkrtchyan { 541837c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 54198b70484cSTigran Mkrtchyan } 54208b70484cSTigran Mkrtchyan 542162cd4a59STigran Mkrtchyan /* 542262cd4a59STigran Mkrtchyan * functions to set current state id 542362cd4a59STigran Mkrtchyan */ 54248b70484cSTigran Mkrtchyan void 54259428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 54269428fe1aSTigran Mkrtchyan { 54279428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 54289428fe1aSTigran Mkrtchyan } 54299428fe1aSTigran Mkrtchyan 54309428fe1aSTigran Mkrtchyan void 54318b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 54328b70484cSTigran Mkrtchyan { 54338b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 54348b70484cSTigran Mkrtchyan } 54358b70484cSTigran Mkrtchyan 54368b70484cSTigran Mkrtchyan void 543762cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 543862cd4a59STigran Mkrtchyan { 543962cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 544062cd4a59STigran Mkrtchyan } 544162cd4a59STigran Mkrtchyan 544262cd4a59STigran Mkrtchyan void 544362cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 544462cd4a59STigran Mkrtchyan { 544562cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 544662cd4a59STigran Mkrtchyan } 544762cd4a59STigran Mkrtchyan 544862cd4a59STigran Mkrtchyan /* 544962cd4a59STigran Mkrtchyan * functions to consume current state id 545062cd4a59STigran Mkrtchyan */ 54511e97b519STigran Mkrtchyan 54521e97b519STigran Mkrtchyan void 54539428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 54549428fe1aSTigran Mkrtchyan { 54559428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 54569428fe1aSTigran Mkrtchyan } 54579428fe1aSTigran Mkrtchyan 54589428fe1aSTigran Mkrtchyan void 54599428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 54609428fe1aSTigran Mkrtchyan { 54619428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 54629428fe1aSTigran Mkrtchyan } 54639428fe1aSTigran Mkrtchyan 54649428fe1aSTigran Mkrtchyan void 54651e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 54661e97b519STigran Mkrtchyan { 54671e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 54681e97b519STigran Mkrtchyan } 54691e97b519STigran Mkrtchyan 54701e97b519STigran Mkrtchyan void 54711e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 54721e97b519STigran Mkrtchyan { 54731e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 54741e97b519STigran Mkrtchyan } 54751e97b519STigran Mkrtchyan 547662cd4a59STigran Mkrtchyan void 54778b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 54788b70484cSTigran Mkrtchyan { 54798b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 54808b70484cSTigran Mkrtchyan } 54818b70484cSTigran Mkrtchyan 54828b70484cSTigran Mkrtchyan void 548362cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 54848b70484cSTigran Mkrtchyan { 548562cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 54868b70484cSTigran Mkrtchyan } 548730813e27STigran Mkrtchyan 548830813e27STigran Mkrtchyan void 548930813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 549030813e27STigran Mkrtchyan { 549130813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 549230813e27STigran Mkrtchyan } 549330813e27STigran Mkrtchyan 549430813e27STigran Mkrtchyan void 549530813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 549630813e27STigran Mkrtchyan { 549730813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 549830813e27STigran Mkrtchyan } 5499