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> 43363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 449a74af21SBoaz Harrosh #include "xdr4.h" 450a3adadeSJ. Bruce Fields #include "vfs.h" 46bfa4b365SJ. Bruce Fields #include "current_stateid.h" 471da177e4SLinus Torvalds 485e1533c7SStanislav Kinsbursky #include "netns.h" 495e1533c7SStanislav Kinsbursky 501da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 511da177e4SLinus Torvalds 52f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 53f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 54f32f3c2dSJ. Bruce Fields .si_generation = ~0, 55f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 56f32f3c2dSJ. Bruce Fields }; 57f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 58f32f3c2dSJ. Bruce Fields /* all fields zero */ 59f32f3c2dSJ. Bruce Fields }; 6019ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6119ff0f28STigran Mkrtchyan .si_generation = 1, 6219ff0f28STigran Mkrtchyan }; 63f32f3c2dSJ. Bruce Fields 64ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 65fd39ca9aSNeilBrown 66f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 67f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 6819ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds /* forward declarations */ 71fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 721da177e4SLinus Torvalds 738b671b80SJ. Bruce Fields /* Locking: */ 748b671b80SJ. Bruce Fields 758b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 76353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 771da177e4SLinus Torvalds 788b671b80SJ. Bruce Fields /* 798b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 808b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 818b671b80SJ. Bruce Fields * eventually cover more: 828b671b80SJ. Bruce Fields */ 838b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 848b671b80SJ. Bruce Fields 85fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 86fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 87e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 88e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 89e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 90e60d4398SNeilBrown 911da177e4SLinus Torvalds void 921da177e4SLinus Torvalds nfs4_lock_state(void) 931da177e4SLinus Torvalds { 94353ab6e9SIngo Molnar mutex_lock(&client_mutex); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 97508dc6e1SBenny Halevy static void free_session(struct kref *); 98508dc6e1SBenny Halevy 99508dc6e1SBenny Halevy /* Must be called under the client_lock */ 100508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 101508dc6e1SBenny Halevy { 102508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 103508dc6e1SBenny Halevy } 104508dc6e1SBenny Halevy 105508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 106508dc6e1SBenny Halevy { 107508dc6e1SBenny Halevy kref_get(&ses->se_ref); 108508dc6e1SBenny Halevy } 109508dc6e1SBenny Halevy 1101da177e4SLinus Torvalds void 1111da177e4SLinus Torvalds nfs4_unlock_state(void) 1121da177e4SLinus Torvalds { 113353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds static inline u32 1171da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1181da177e4SLinus Torvalds { 1191da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds u32 x = 0; 1221da177e4SLinus Torvalds while (nbytes--) { 1231da177e4SLinus Torvalds x *= 37; 1241da177e4SLinus Torvalds x += *cptr++; 1251da177e4SLinus Torvalds } 1261da177e4SLinus Torvalds return x; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds 1291da177e4SLinus Torvalds static struct list_head del_recall_lru; 1301da177e4SLinus Torvalds 13132513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13232513b40SJ. Bruce Fields { 13332513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13432513b40SJ. Bruce Fields } 13532513b40SJ. Bruce Fields 13613cd2184SNeilBrown static inline void 13713cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 13813cd2184SNeilBrown { 1398b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1408b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1418b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1428b671b80SJ. Bruce Fields iput(fi->fi_inode); 14332513b40SJ. Bruce Fields nfsd4_free_file(fi); 1448b671b80SJ. Bruce Fields } 14513cd2184SNeilBrown } 14613cd2184SNeilBrown 14713cd2184SNeilBrown static inline void 14813cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14913cd2184SNeilBrown { 1508b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15113cd2184SNeilBrown } 15213cd2184SNeilBrown 153ef0f3390SNeilBrown static int num_delegations; 154c2f1a551SMeelap Shah unsigned int max_delegations; 155ef0f3390SNeilBrown 156ef0f3390SNeilBrown /* 157ef0f3390SNeilBrown * Open owner state (share locks) 158ef0f3390SNeilBrown */ 159ef0f3390SNeilBrown 16016bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16116bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16216bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16316bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 164ef0f3390SNeilBrown 16516bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 166ddc04c41SJ. Bruce Fields { 167ddc04c41SJ. Bruce Fields unsigned int ret; 168ddc04c41SJ. Bruce Fields 169ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 170ddc04c41SJ. Bruce Fields ret += clientid; 17116bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 172ddc04c41SJ. Bruce Fields } 173ef0f3390SNeilBrown 174ef0f3390SNeilBrown /* hash table for nfs4_file */ 175ef0f3390SNeilBrown #define FILE_HASH_BITS 8 176ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 17735079582SShan Wei 178ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 179ddc04c41SJ. Bruce Fields { 180ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 181ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 182ddc04c41SJ. Bruce Fields } 183ddc04c41SJ. Bruce Fields 184ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 185ef0f3390SNeilBrown 186998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 187f9d7562fSJ. Bruce Fields { 188063b0fb9SJ. Bruce Fields WARN_ON_ONCE(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 189f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 190f9d7562fSJ. Bruce Fields } 191f9d7562fSJ. Bruce Fields 192998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 193998db52cSJ. Bruce Fields { 194998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 195998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 196998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 197998db52cSJ. Bruce Fields } else 198998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 199998db52cSJ. Bruce Fields } 200998db52cSJ. Bruce Fields 201998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 202f9d7562fSJ. Bruce Fields { 203f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 204f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 205f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 206f9d7562fSJ. Bruce Fields } 207f9d7562fSJ. Bruce Fields } 208f9d7562fSJ. Bruce Fields 209998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 210f9d7562fSJ. Bruce Fields { 211f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 212f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2133d02fa29SJ. Bruce Fields /* 2143d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2153d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2163d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2173d02fa29SJ. Bruce Fields */ 2183d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2193d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2203d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 221f9d7562fSJ. Bruce Fields } 222f9d7562fSJ. Bruce Fields } 223f9d7562fSJ. Bruce Fields 224998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 225998db52cSJ. Bruce Fields { 226998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 227998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 228998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 229998db52cSJ. Bruce Fields } else 230998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 231998db52cSJ. Bruce Fields } 232998db52cSJ. Bruce Fields 2336136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23436d44c60SJ. Bruce Fields { 2356136d2b4SJ. Bruce Fields static int min_stateid = 0; 23638c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2376136d2b4SJ. Bruce Fields int new_stid; 2386136d2b4SJ. Bruce Fields int error; 23936d44c60SJ. Bruce Fields 24038c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2416136d2b4SJ. Bruce Fields /* 242996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 243996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 244996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 245996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2466136d2b4SJ. Bruce Fields */ 247063b0fb9SJ. Bruce Fields WARN_ON_ONCE(error); 2486136d2b4SJ. Bruce Fields /* 2496136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2506136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2516136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2526136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2536136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2546136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2556136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2566136d2b4SJ. Bruce Fields */ 2576136d2b4SJ. Bruce Fields 2586136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2596136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2606136d2b4SJ. Bruce Fields min_stateid = 0; 2616136d2b4SJ. Bruce Fields return new_stid; 26236d44c60SJ. Bruce Fields } 26336d44c60SJ. Bruce Fields 264996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2652a74aba7SJ. Bruce Fields { 2662a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2676136d2b4SJ. Bruce Fields int new_id; 2682a74aba7SJ. Bruce Fields 2692a74aba7SJ. Bruce Fields stid->sc_type = type; 2702a74aba7SJ. Bruce Fields stid->sc_client = cl; 2712a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2726136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2736136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2742a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2752a74aba7SJ. Bruce Fields s->si_generation = 0; 276996e0938SJ. Bruce Fields } 277996e0938SJ. Bruce Fields 278996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 279996e0938SJ. Bruce Fields { 280996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 281996e0938SJ. Bruce Fields 282996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 283996e0938SJ. Bruce Fields return NULL; 284996e0938SJ. Bruce Fields /* 285996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 286996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 287996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 288996e0938SJ. Bruce Fields * preallocated entries. 289996e0938SJ. Bruce Fields */ 290996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2912a74aba7SJ. Bruce Fields } 2922a74aba7SJ. Bruce Fields 2934cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2944cdc951bSJ. Bruce Fields { 2954cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 2964cdc951bSJ. Bruce Fields } 2974cdc951bSJ. Bruce Fields 2981da177e4SLinus Torvalds static struct nfs4_delegation * 299dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3001da177e4SLinus Torvalds { 3011da177e4SLinus Torvalds struct nfs4_delegation *dp; 3021da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3031da177e4SLinus Torvalds 3041da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 305c3e48080SJ. Bruce Fields /* 306c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 307c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 308c3e48080SJ. Bruce Fields * write delegations properly. 309c3e48080SJ. Bruce Fields */ 310c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 311c3e48080SJ. Bruce Fields return NULL; 31247f9940cSMeelap Shah if (fp->fi_had_conflict) 31347f9940cSMeelap Shah return NULL; 314c2f1a551SMeelap Shah if (num_delegations > max_delegations) 315ef0f3390SNeilBrown return NULL; 316996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3175b2d21c1SNeilBrown if (dp == NULL) 3181da177e4SLinus Torvalds return dp; 319996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3202a74aba7SJ. Bruce Fields /* 3212a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3226136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3236136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3242a74aba7SJ. Bruce Fields */ 3252a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 326ef0f3390SNeilBrown num_delegations++; 327ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 328ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3291da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33013cd2184SNeilBrown get_nfs4_file(fp); 3311da177e4SLinus Torvalds dp->dl_file = fp; 3321da177e4SLinus Torvalds dp->dl_type = type; 3336c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3341da177e4SLinus Torvalds dp->dl_time = 0; 3351da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 33657725155SJ. Bruce Fields nfsd4_init_callback(&dp->dl_recall); 3371da177e4SLinus Torvalds return dp; 3381da177e4SLinus Torvalds } 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds void 3411da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3421da177e4SLinus Torvalds { 3431da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3441da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 34513cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3465b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 347ef0f3390SNeilBrown num_delegations--; 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 351acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3521da177e4SLinus Torvalds { 353acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 354acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 355acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3564ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 357acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 358acfdf5c3SJ. Bruce Fields } 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 3616136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3626136d2b4SJ. Bruce Fields { 36338c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36438c2f4b1SJ. Bruce Fields 36538c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3666136d2b4SJ. Bruce Fields } 3676136d2b4SJ. Bruce Fields 3681da177e4SLinus Torvalds /* Called under the state lock. */ 3691da177e4SLinus Torvalds static void 3701da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3711da177e4SLinus Torvalds { 3726136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 373ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3741da177e4SLinus Torvalds spin_lock(&recall_lock); 3755d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3761da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3771da177e4SLinus Torvalds spin_unlock(&recall_lock); 378acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3791da177e4SLinus Torvalds nfs4_put_delegation(dp); 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds /* 3831da177e4SLinus Torvalds * SETCLIENTID state 3841da177e4SLinus Torvalds */ 3851da177e4SLinus Torvalds 386ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 387ddc04c41SJ. Bruce Fields { 388ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 389ddc04c41SJ. Bruce Fields } 390ddc04c41SJ. Bruce Fields 391ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 392ddc04c41SJ. Bruce Fields { 393ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 394ddc04c41SJ. Bruce Fields } 395ddc04c41SJ. Bruce Fields 3961da177e4SLinus Torvalds /* 397f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 398f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 399f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 400f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 401f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 402f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 403f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 404f9d7562fSJ. Bruce Fields * 405f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 406f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 407f9d7562fSJ. Bruce Fields * 408f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 409f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 410f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 411f9d7562fSJ. Bruce Fields * 412f9d7562fSJ. Bruce Fields * which we should reject. 413f9d7562fSJ. Bruce Fields */ 4145ae037e5SJeff Layton static unsigned int 4155ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 416f9d7562fSJ. Bruce Fields int i; 4175ae037e5SJeff Layton unsigned int access = 0; 418f9d7562fSJ. Bruce Fields 419f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 420f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4215ae037e5SJeff Layton access |= i; 422f9d7562fSJ. Bruce Fields } 4235ae037e5SJeff Layton return access; 424f9d7562fSJ. Bruce Fields } 425f9d7562fSJ. Bruce Fields 4263a328614SJeff Layton static bool 427dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 428f9d7562fSJ. Bruce Fields unsigned int access, deny; 429f9d7562fSJ. Bruce Fields 4305ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4315ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 432f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4333a328614SJeff Layton return false; 4343a328614SJeff Layton return true; 435f9d7562fSJ. Bruce Fields } 436f9d7562fSJ. Bruce Fields 43782c5ff1bSJeff Layton /* set share access for a given stateid */ 43882c5ff1bSJeff Layton static inline void 43982c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 44082c5ff1bSJeff Layton { 44182c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 44282c5ff1bSJeff Layton } 44382c5ff1bSJeff Layton 44482c5ff1bSJeff Layton /* clear share access for a given stateid */ 44582c5ff1bSJeff Layton static inline void 44682c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 44782c5ff1bSJeff Layton { 44882c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 44982c5ff1bSJeff Layton } 45082c5ff1bSJeff Layton 45182c5ff1bSJeff Layton /* test whether a given stateid has access */ 45282c5ff1bSJeff Layton static inline bool 45382c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 45482c5ff1bSJeff Layton { 45582c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 45682c5ff1bSJeff Layton } 45782c5ff1bSJeff Layton 458ce0fc43cSJeff Layton /* set share deny for a given stateid */ 459ce0fc43cSJeff Layton static inline void 460ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 461ce0fc43cSJeff Layton { 462ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 463ce0fc43cSJeff Layton } 464ce0fc43cSJeff Layton 465ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 466ce0fc43cSJeff Layton static inline void 467ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 468ce0fc43cSJeff Layton { 469ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 470ce0fc43cSJeff Layton } 471ce0fc43cSJeff Layton 472ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 473ce0fc43cSJeff Layton static inline bool 474ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 475ce0fc43cSJeff Layton { 476ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 477f9d7562fSJ. Bruce Fields } 478f9d7562fSJ. Bruce Fields 479f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 480f9d7562fSJ. Bruce Fields { 4818f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 482f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 483f9d7562fSJ. Bruce Fields return O_RDONLY; 484f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 485f9d7562fSJ. Bruce Fields return O_WRONLY; 486f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 487f9d7562fSJ. Bruce Fields return O_RDWR; 488f9d7562fSJ. Bruce Fields } 489063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 490063b0fb9SJ. Bruce Fields return O_RDONLY; 491f9d7562fSJ. Bruce Fields } 492f9d7562fSJ. Bruce Fields 49382c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 49482c5ff1bSJeff Layton static void 49582c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 49682c5ff1bSJeff Layton { 49782c5ff1bSJeff Layton int i; 49882c5ff1bSJeff Layton 49982c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 50082c5ff1bSJeff Layton if (test_access(i, stp)) 50182c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 50282c5ff1bSJeff Layton nfs4_access_to_omode(i)); 50382c5ff1bSJeff Layton clear_access(i, stp); 50482c5ff1bSJeff Layton } 50582c5ff1bSJeff Layton } 50682c5ff1bSJeff Layton 507dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 508529d7b2aSJ. Bruce Fields { 509529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 510529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 511529d7b2aSJ. Bruce Fields } 512529d7b2aSJ. Bruce Fields 513dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 514529d7b2aSJ. Bruce Fields { 51582c5ff1bSJeff Layton release_all_access(stp); 516a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5174665e2baSJ. Bruce Fields stp->st_file = NULL; 5184665e2baSJ. Bruce Fields } 5194665e2baSJ. Bruce Fields 520dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5214665e2baSJ. Bruce Fields { 522529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 523529d7b2aSJ. Bruce Fields } 524529d7b2aSJ. Bruce Fields 525dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 526529d7b2aSJ. Bruce Fields { 527529d7b2aSJ. Bruce Fields struct file *file; 528529d7b2aSJ. Bruce Fields 529529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5306136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 531529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 532529d7b2aSJ. Bruce Fields if (file) 533fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 53438c387b5SJ. Bruce Fields close_generic_stateid(stp); 535529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 536529d7b2aSJ. Bruce Fields } 537529d7b2aSJ. Bruce Fields 538fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 539529d7b2aSJ. Bruce Fields { 540dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 541529d7b2aSJ. Bruce Fields 542fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 543fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 544009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 545fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 546fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 547dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 548529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 549529d7b2aSJ. Bruce Fields } 550529d7b2aSJ. Bruce Fields } 551529d7b2aSJ. Bruce Fields 552fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 553529d7b2aSJ. Bruce Fields { 554fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 555fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 556529d7b2aSJ. Bruce Fields } 557529d7b2aSJ. Bruce Fields 558529d7b2aSJ. Bruce Fields static void 559dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 560529d7b2aSJ. Bruce Fields { 561fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 562529d7b2aSJ. Bruce Fields 563529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 564fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 565fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 566fe0750e5SJ. Bruce Fields release_lockowner(lo); 567529d7b2aSJ. Bruce Fields } 568529d7b2aSJ. Bruce Fields } 569529d7b2aSJ. Bruce Fields 57038c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5712283963fSJ. Bruce Fields { 5722283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5732283963fSJ. Bruce Fields release_stateid_lockowners(stp); 57438c387b5SJ. Bruce Fields close_generic_stateid(stp); 57538c387b5SJ. Bruce Fields } 57638c387b5SJ. Bruce Fields 57738c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 57838c387b5SJ. Bruce Fields { 57938c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5806136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 5812283963fSJ. Bruce Fields free_generic_stateid(stp); 5822283963fSJ. Bruce Fields } 5832283963fSJ. Bruce Fields 584fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 585f1d110caSJ. Bruce Fields { 586dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 587f1d110caSJ. Bruce Fields 588fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 589fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 590fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 591fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 592dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 593f1d110caSJ. Bruce Fields release_open_stateid(stp); 594f1d110caSJ. Bruce Fields } 595f1d110caSJ. Bruce Fields } 596f1d110caSJ. Bruce Fields 597f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 598f7a4d872SJ. Bruce Fields { 599f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 600f7a4d872SJ. Bruce Fields 601f7a4d872SJ. Bruce Fields if (s) { 6026136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 603f7a4d872SJ. Bruce Fields free_generic_stateid(s); 604f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 605f7a4d872SJ. Bruce Fields } 606f7a4d872SJ. Bruce Fields } 607f7a4d872SJ. Bruce Fields 608fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 609f1d110caSJ. Bruce Fields { 610fe0750e5SJ. Bruce Fields unhash_openowner(oo); 611fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 612f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 613fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 614f1d110caSJ. Bruce Fields } 615f1d110caSJ. Bruce Fields 6165282fd72SMarc Eshel static inline int 6175282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6185282fd72SMarc Eshel { 6195282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6205282fd72SMarc Eshel 6215282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6225282fd72SMarc Eshel } 6235282fd72SMarc Eshel 6248f199b82STrond Myklebust #ifdef NFSD_DEBUG 6255282fd72SMarc Eshel static inline void 6265282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6275282fd72SMarc Eshel { 6285282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6295282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6305282fd72SMarc Eshel } 6318f199b82STrond Myklebust #else 6328f199b82STrond Myklebust static inline void 6338f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6348f199b82STrond Myklebust { 6358f199b82STrond Myklebust } 6368f199b82STrond Myklebust #endif 6378f199b82STrond Myklebust 6385282fd72SMarc Eshel 639ec6b5d7bSAndy Adamson static void 640ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 641ec6b5d7bSAndy Adamson { 642ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 643ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 644ec6b5d7bSAndy Adamson 645ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 646ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 647ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 648ec6b5d7bSAndy Adamson sid->reserved = 0; 649ec6b5d7bSAndy Adamson } 650ec6b5d7bSAndy Adamson 651ec6b5d7bSAndy Adamson /* 652a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 653a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 654a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 655a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 656a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 657a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 658a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 659a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 660a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 661a649637cSAndy Adamson * for the SEQUENCE op response: 662ec6b5d7bSAndy Adamson */ 663a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 664a649637cSAndy Adamson 665557ce264SAndy Adamson static void 666557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 667557ce264SAndy Adamson { 668557ce264SAndy Adamson int i; 669557ce264SAndy Adamson 670557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 671557ce264SAndy Adamson kfree(ses->se_slots[i]); 672557ce264SAndy Adamson } 673557ce264SAndy Adamson 674efe0cb6dSJ. Bruce Fields /* 675efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 676efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 677efe0cb6dSJ. Bruce Fields */ 678efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 679efe0cb6dSJ. Bruce Fields { 680efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 681efe0cb6dSJ. Bruce Fields } 682efe0cb6dSJ. Bruce Fields 6835b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 684ec6b5d7bSAndy Adamson { 6855b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 6865b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 687ec6b5d7bSAndy Adamson 6885b6feee9SJ. Bruce Fields return size; 689557ce264SAndy Adamson } 690557ce264SAndy Adamson 6915b6feee9SJ. Bruce Fields /* 6925b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 6935b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 69442b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 6955b6feee9SJ. Bruce Fields */ 6965b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 6975b6feee9SJ. Bruce Fields { 6985b6feee9SJ. Bruce Fields int avail; 6995b6feee9SJ. Bruce Fields 7005b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7015b6feee9SJ. Bruce Fields 7025b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7035b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7045b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7055b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7065b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7075b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7085b6feee9SJ. Bruce Fields 7095b6feee9SJ. Bruce Fields return num; 7105b6feee9SJ. Bruce Fields } 7115b6feee9SJ. Bruce Fields 7125b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7135b6feee9SJ. Bruce Fields { 7145b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7155b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7165b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7175b6feee9SJ. Bruce Fields } 7185b6feee9SJ. Bruce Fields 719a827bcb2SJ. Bruce Fields static struct nfsd4_session *__alloc_session(int slotsize, int numslots) 7205b6feee9SJ. Bruce Fields { 7215b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7225b6feee9SJ. Bruce Fields int mem, i; 723ec6b5d7bSAndy Adamson 724c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 725ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7265b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 727ec6b5d7bSAndy Adamson 7285b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7296c18ba9fSAlexandros Batsakis if (!new) 7305b6feee9SJ. Bruce Fields return NULL; 731ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7325b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7335b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7345b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7355b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 736ec6b5d7bSAndy Adamson goto out_free; 737ec6b5d7bSAndy Adamson } 7385b6feee9SJ. Bruce Fields return new; 7395b6feee9SJ. Bruce Fields out_free: 7405b6feee9SJ. Bruce Fields while (i--) 7415b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7425b6feee9SJ. Bruce Fields kfree(new); 7435b6feee9SJ. Bruce Fields return NULL; 7445b6feee9SJ. Bruce Fields } 7455b6feee9SJ. Bruce Fields 7465b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7475b6feee9SJ. Bruce Fields { 7485b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7495b6feee9SJ. Bruce Fields 7505b6feee9SJ. Bruce Fields new->maxreqs = numslots; 751d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 752d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7535b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7545b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7555b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7565b6feee9SJ. Bruce Fields } 7575b6feee9SJ. Bruce Fields 75819cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 75919cf5c02SJ. Bruce Fields { 76019cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 76119cf5c02SJ. Bruce Fields kfree(c); 76219cf5c02SJ. Bruce Fields } 76319cf5c02SJ. Bruce Fields 76419cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 76519cf5c02SJ. Bruce Fields { 76619cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 76719cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 76819cf5c02SJ. Bruce Fields 76919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 77019cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 77119cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 77219cf5c02SJ. Bruce Fields free_conn(c); 77319cf5c02SJ. Bruce Fields } 77419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 775eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 77619cf5c02SJ. Bruce Fields } 77719cf5c02SJ. Bruce Fields 778d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 779c7662518SJ. Bruce Fields { 780c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 781c7662518SJ. Bruce Fields 782c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 783c7662518SJ. Bruce Fields if (!conn) 784db90681dSJ. Bruce Fields return NULL; 785c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 786c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 787d29c374cSJ. Bruce Fields conn->cn_flags = flags; 788db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 789db90681dSJ. Bruce Fields return conn; 790db90681dSJ. Bruce Fields } 791db90681dSJ. Bruce Fields 792328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 793328ead28SJ. Bruce Fields { 794328ead28SJ. Bruce Fields conn->cn_session = ses; 795328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 796328ead28SJ. Bruce Fields } 797328ead28SJ. Bruce Fields 798db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 799db90681dSJ. Bruce Fields { 800db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 801c7662518SJ. Bruce Fields 802c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 803328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 804c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 805db90681dSJ. Bruce Fields } 806c7662518SJ. Bruce Fields 80721b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 808db90681dSJ. Bruce Fields { 80919cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 81021b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 811db90681dSJ. Bruce Fields } 812db90681dSJ. Bruce Fields 813e1ff371fSJ. Bruce Fields static void nfsd4_init_conn(struct svc_rqst *rqstp, struct nfsd4_conn *conn, struct nfsd4_session *ses) 814db90681dSJ. Bruce Fields { 81521b75b01SJ. Bruce Fields int ret; 816db90681dSJ. Bruce Fields 817db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 81821b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 81921b75b01SJ. Bruce Fields if (ret) 82021b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 82121b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 8226a3b1563SJ. Bruce Fields if (conn->cn_flags & NFS4_CDFC4_BACK) { 82324119673SWeston Andros Adamson /* callback channel may be back up */ 82424119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 82524119673SWeston Andros Adamson } 826c7662518SJ. Bruce Fields } 827c7662518SJ. Bruce Fields 828e1ff371fSJ. Bruce Fields static struct nfsd4_conn *alloc_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_create_session *cses) 8291d1bc8f2SJ. Bruce Fields { 8301d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8311d1bc8f2SJ. Bruce Fields 832e1ff371fSJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) 8331d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 834e1ff371fSJ. Bruce Fields return alloc_conn(rqstp, dir); 8351d1bc8f2SJ. Bruce Fields } 8361d1bc8f2SJ. Bruce Fields 8371d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 83819cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 839c7662518SJ. Bruce Fields { 84019cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 84119cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 84219cf5c02SJ. Bruce Fields 84319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 84419cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 84519cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 84619cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 84719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 84819cf5c02SJ. Bruce Fields 84919cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 85019cf5c02SJ. Bruce Fields free_conn(c); 85119cf5c02SJ. Bruce Fields 85219cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 85319cf5c02SJ. Bruce Fields } 85419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 855c7662518SJ. Bruce Fields } 856c7662518SJ. Bruce Fields 8571377b69eSJ. Bruce Fields static void __free_session(struct nfsd4_session *ses) 8581377b69eSJ. Bruce Fields { 8591377b69eSJ. Bruce Fields nfsd4_put_drc_mem(slot_bytes(&ses->se_fchannel), ses->se_fchannel.maxreqs); 8601377b69eSJ. Bruce Fields free_session_slots(ses); 8611377b69eSJ. Bruce Fields kfree(ses); 8621377b69eSJ. Bruce Fields } 8631377b69eSJ. Bruce Fields 864508dc6e1SBenny Halevy static void free_session(struct kref *kref) 865c7662518SJ. Bruce Fields { 866c7662518SJ. Bruce Fields struct nfsd4_session *ses; 867c9a49628SStanislav Kinsbursky struct nfsd_net *nn; 868c7662518SJ. Bruce Fields 869c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 870c9a49628SStanislav Kinsbursky nn = net_generic(ses->se_client->net, nfsd_net_id); 871c9a49628SStanislav Kinsbursky 872c9a49628SStanislav Kinsbursky lockdep_assert_held(&nn->client_lock); 87319cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 8741377b69eSJ. Bruce Fields __free_session(ses); 875c7662518SJ. Bruce Fields } 876c7662518SJ. Bruce Fields 877508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 878508dc6e1SBenny Halevy { 879c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(ses->se_client->net, nfsd_net_id); 880c9a49628SStanislav Kinsbursky 881c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 882508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 883c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 884508dc6e1SBenny Halevy } 885508dc6e1SBenny Halevy 886a827bcb2SJ. Bruce Fields static struct nfsd4_session *alloc_session(struct nfsd4_channel_attrs *fchan) 8875b6feee9SJ. Bruce Fields { 8885b6feee9SJ. Bruce Fields struct nfsd4_session *new; 8895b6feee9SJ. Bruce Fields int numslots, slotsize; 8905b6feee9SJ. Bruce Fields /* 8915b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 8925b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 8935b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 8945b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 8955b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 8965b6feee9SJ. Bruce Fields */ 8975b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 8985b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 899ced6dfe9SMi Jinlong if (numslots < 1) 900ced6dfe9SMi Jinlong return NULL; 9015b6feee9SJ. Bruce Fields 902a827bcb2SJ. Bruce Fields new = __alloc_session(slotsize, numslots); 9035b6feee9SJ. Bruce Fields if (!new) { 9045b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 905ac7c46f2SJ. Bruce Fields return NULL; 9065b6feee9SJ. Bruce Fields } 9075b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 908a827bcb2SJ. Bruce Fields return new; 909a827bcb2SJ. Bruce Fields } 910ec6b5d7bSAndy Adamson 911135ae827SFengguang Wu static void init_session(struct svc_rqst *rqstp, struct nfsd4_session *new, struct nfs4_client *clp, struct nfsd4_create_session *cses) 912a827bcb2SJ. Bruce Fields { 913a827bcb2SJ. Bruce Fields int idx; 9141872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 915a827bcb2SJ. Bruce Fields 916ec6b5d7bSAndy Adamson new->se_client = clp; 917ec6b5d7bSAndy Adamson gen_sessionid(new); 918ec6b5d7bSAndy Adamson 919c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 920c7662518SJ. Bruce Fields 921ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 922ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9238b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 924c6bb3ca2SJ. Bruce Fields new->se_cb_sec = cses->cb_sec; 925ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9265b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 927c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 9281872de0eSStanislav Kinsbursky list_add(&new->se_hash, &nn->sessionid_hashtbl[idx]); 9294c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 930ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9314c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 932c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 933ec6b5d7bSAndy Adamson 934dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 935edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 936dcbeaa68SJ. Bruce Fields /* 937dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 938dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 939dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 940dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 941dcbeaa68SJ. Bruce Fields * future: 942dcbeaa68SJ. Bruce Fields */ 943edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 944edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 945edd76786SJ. Bruce Fields } 946ec6b5d7bSAndy Adamson } 947ec6b5d7bSAndy Adamson 9489089f1b4SBenny Halevy /* caller must hold client_lock */ 9495282fd72SMarc Eshel static struct nfsd4_session * 9501872de0eSStanislav Kinsbursky find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid, struct net *net) 9515282fd72SMarc Eshel { 9525282fd72SMarc Eshel struct nfsd4_session *elem; 9535282fd72SMarc Eshel int idx; 9541872de0eSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 9555282fd72SMarc Eshel 9565282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9575282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9585282fd72SMarc Eshel /* Search in the appropriate list */ 9591872de0eSStanislav Kinsbursky list_for_each_entry(elem, &nn->sessionid_hashtbl[idx], se_hash) { 9605282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9615282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9625282fd72SMarc Eshel return elem; 9635282fd72SMarc Eshel } 9645282fd72SMarc Eshel } 9655282fd72SMarc Eshel 9665282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9675282fd72SMarc Eshel return NULL; 9685282fd72SMarc Eshel } 9695282fd72SMarc Eshel 9709089f1b4SBenny Halevy /* caller must hold client_lock */ 9717116ed6bSAndy Adamson static void 9725282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9737116ed6bSAndy Adamson { 9747116ed6bSAndy Adamson list_del(&ses->se_hash); 9754c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9767116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9774c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9785282fd72SMarc Eshel } 9795282fd72SMarc Eshel 98036acb66bSBenny Halevy /* must be called under the client_lock */ 9811da177e4SLinus Torvalds static inline void 98236acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9831da177e4SLinus Torvalds { 9845ed58bb2SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 9855ed58bb2SStanislav Kinsbursky 98607cd4909SBenny Halevy if (is_client_expired(clp)) { 9877447758bSJ. Bruce Fields WARN_ON(1); 9887447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 98907cd4909SBenny Halevy __func__, 99007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 99107cd4909SBenny Halevy clp->cl_clientid.cl_id); 99207cd4909SBenny Halevy return; 99307cd4909SBenny Halevy } 99407cd4909SBenny Halevy 9951da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 9961da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 9971da177e4SLinus Torvalds clp->cl_clientid.cl_id); 9985ed58bb2SStanislav Kinsbursky list_move_tail(&clp->cl_lru, &nn->client_lru); 9991da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds 100236acb66bSBenny Halevy static inline void 100336acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 100436acb66bSBenny Halevy { 1005c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1006c9a49628SStanislav Kinsbursky 1007c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 100836acb66bSBenny Halevy renew_client_locked(clp); 1009c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 101036acb66bSBenny Halevy } 101136acb66bSBenny Halevy 10121da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10131da177e4SLinus Torvalds static int 10142c142baaSStanislav Kinsbursky STALE_CLIENTID(clientid_t *clid, struct nfsd_net *nn) 10151da177e4SLinus Torvalds { 10162c142baaSStanislav Kinsbursky if (clid->cl_boot == nn->boot_time) 10171da177e4SLinus Torvalds return 0; 101860adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 10192c142baaSStanislav Kinsbursky clid->cl_boot, clid->cl_id, nn->boot_time); 10201da177e4SLinus Torvalds return 1; 10211da177e4SLinus Torvalds } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds /* 10241da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10251da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10261da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10271da177e4SLinus Torvalds */ 102835bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds struct nfs4_client *clp; 10311da177e4SLinus Torvalds 103235bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 103335bba9a3SJ. Bruce Fields if (clp == NULL) 103435bba9a3SJ. Bruce Fields return NULL; 103567114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 103635bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 103735bba9a3SJ. Bruce Fields kfree(clp); 103835bba9a3SJ. Bruce Fields return NULL; 103935bba9a3SJ. Bruce Fields } 10401da177e4SLinus Torvalds clp->cl_name.len = name.len; 10411da177e4SLinus Torvalds return clp; 10421da177e4SLinus Torvalds } 10431da177e4SLinus Torvalds 10441da177e4SLinus Torvalds static inline void 10451da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10461da177e4SLinus Torvalds { 1047c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1048c9a49628SStanislav Kinsbursky 1049c9a49628SStanislav Kinsbursky lockdep_assert_held(&nn->client_lock); 1050792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1051792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1052792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1053792c95ddSJ. Bruce Fields se_perclnt); 1054792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1055508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1056792c95ddSJ. Bruce Fields } 105703a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10581da177e4SLinus Torvalds kfree(clp->cl_name.data); 10591da177e4SLinus Torvalds kfree(clp); 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 1062d7682988SBenny Halevy void 1063d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1064d7682988SBenny Halevy { 1065d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1066c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 1067d7682988SBenny Halevy 1068c9a49628SStanislav Kinsbursky if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock)) 1069d7682988SBenny Halevy return; 1070d7682988SBenny Halevy if (is_client_expired(clp)) { 1071d7682988SBenny Halevy free_client(clp); 1072d7682988SBenny Halevy session->se_client = NULL; 1073d7682988SBenny Halevy } else 1074d7682988SBenny Halevy renew_client_locked(clp); 1075c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1076d7682988SBenny Halevy } 1077d7682988SBenny Halevy 107884d38ac9SBenny Halevy /* must be called under the client_lock */ 107984d38ac9SBenny Halevy static inline void 108084d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 108184d38ac9SBenny Halevy { 1082792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1083792c95ddSJ. Bruce Fields 108407cd4909SBenny Halevy mark_client_expired(clp); 108584d38ac9SBenny Halevy list_del(&clp->cl_lru); 10864c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1087792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1088792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10894c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 109084d38ac9SBenny Halevy } 109184d38ac9SBenny Halevy 10921da177e4SLinus Torvalds static void 10930d22f68fSJ. Bruce Fields destroy_client(struct nfs4_client *clp) 10941da177e4SLinus Torvalds { 1095fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 10961da177e4SLinus Torvalds struct nfs4_delegation *dp; 10971da177e4SLinus Torvalds struct list_head reaplist; 1098382a62e7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11011da177e4SLinus Torvalds spin_lock(&recall_lock); 1102ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1103ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1104ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11051da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds spin_unlock(&recall_lock); 11081da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11091da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11101da177e4SLinus Torvalds unhash_delegation(dp); 11111da177e4SLinus Torvalds } 1112ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1113fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1114fe0750e5SJ. Bruce Fields release_openowner(oo); 11151da177e4SLinus Torvalds } 11166ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11172bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11182bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 111984d38ac9SBenny Halevy list_del(&clp->cl_idhash); 1120ac55fdc4SJeff Layton if (test_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags)) 1121382a62e7SStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->conf_name_tree); 1122ac55fdc4SJeff Layton else 1123a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 1124c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 112584d38ac9SBenny Halevy unhash_client_locked(clp); 112646583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1127b12a05cbSJ. Bruce Fields free_client(clp); 1128c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 11310d22f68fSJ. Bruce Fields static void expire_client(struct nfs4_client *clp) 11320d22f68fSJ. Bruce Fields { 11330d22f68fSJ. Bruce Fields nfsd4_client_record_remove(clp); 11340d22f68fSJ. Bruce Fields destroy_client(clp); 11350d22f68fSJ. Bruce Fields } 11360d22f68fSJ. Bruce Fields 113735bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 113835bba9a3SJ. Bruce Fields { 113935bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 114035bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 114335bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 114435bba9a3SJ. Bruce Fields { 11451da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11461da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds 114903a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 115035bba9a3SJ. Bruce Fields { 115103a4e1f6SJ. Bruce Fields if (source->cr_principal) { 115203a4e1f6SJ. Bruce Fields target->cr_principal = 115303a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 115403a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 115503a4e1f6SJ. Bruce Fields return -ENOMEM; 115603a4e1f6SJ. Bruce Fields } else 115703a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1158d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11591da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11601da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11611da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11621da177e4SLinus Torvalds get_group_info(target->cr_group_info); 116303a4e1f6SJ. Bruce Fields return 0; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 1166ac55fdc4SJeff Layton static long long 1167ac55fdc4SJeff Layton compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2) 1168ac55fdc4SJeff Layton { 1169ac55fdc4SJeff Layton long long res; 1170ac55fdc4SJeff Layton 1171ac55fdc4SJeff Layton res = o1->len - o2->len; 1172ac55fdc4SJeff Layton if (res) 1173ac55fdc4SJeff Layton return res; 1174ac55fdc4SJeff Layton return (long long)memcmp(o1->data, o2->data, o1->len); 1175ac55fdc4SJeff Layton } 1176ac55fdc4SJeff Layton 117735bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1178599e0a22SJ. Bruce Fields { 1179a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds static int 1183599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1184599e0a22SJ. Bruce Fields { 1185599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds 11881da177e4SLinus Torvalds static int 1189599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1190599e0a22SJ. Bruce Fields { 1191599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11948fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 11958fbba96eSJ. Bruce Fields { 11968fbba96eSJ. Bruce Fields int i; 11978fbba96eSJ. Bruce Fields 11988fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 11998fbba96eSJ. Bruce Fields return false; 12008fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12018fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12028fbba96eSJ. Bruce Fields return false; 12038fbba96eSJ. Bruce Fields return true; 12048fbba96eSJ. Bruce Fields } 12058fbba96eSJ. Bruce Fields 120668eb3508SJ. Bruce Fields /* 120768eb3508SJ. Bruce Fields * RFC 3530 language requires clid_inuse be returned when the 120868eb3508SJ. Bruce Fields * "principal" associated with a requests differs from that previously 120968eb3508SJ. Bruce Fields * used. We use uid, gid's, and gss principal string as our best 121068eb3508SJ. Bruce Fields * approximation. We also don't want to allow non-gss use of a client 121168eb3508SJ. Bruce Fields * established using gss: in theory cr_principal should catch that 121268eb3508SJ. Bruce Fields * change, but in practice cr_principal can be null even in the gss case 121368eb3508SJ. Bruce Fields * since gssd doesn't always pass down a principal string. 121468eb3508SJ. Bruce Fields */ 121568eb3508SJ. Bruce Fields static bool is_gss_cred(struct svc_cred *cr) 121668eb3508SJ. Bruce Fields { 121768eb3508SJ. Bruce Fields /* Is cr_flavor one of the gss "pseudoflavors"?: */ 121868eb3508SJ. Bruce Fields return (cr->cr_flavor > RPC_AUTH_MAXFLAVOR); 121968eb3508SJ. Bruce Fields } 122068eb3508SJ. Bruce Fields 122168eb3508SJ. Bruce Fields 12225559b50aSVivek Trivedi static bool 1223599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1224599e0a22SJ. Bruce Fields { 122568eb3508SJ. Bruce Fields if ((is_gss_cred(cr1) != is_gss_cred(cr2)) 1226d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12278fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12288fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12298fbba96eSJ. Bruce Fields return false; 12308fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12318fbba96eSJ. Bruce Fields return true; 12328fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12338fbba96eSJ. Bruce Fields return false; 12345559b50aSVivek Trivedi return 0 == strcmp(cr1->cr_principal, cr2->cr_principal); 12351da177e4SLinus Torvalds } 12361da177e4SLinus Torvalds 1237c212cecfSStanislav Kinsbursky static void gen_clid(struct nfs4_client *clp, struct nfsd_net *nn) 12385ec7b46cSJ. Bruce Fields { 12395ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12405ec7b46cSJ. Bruce Fields 12412c142baaSStanislav Kinsbursky clp->cl_clientid.cl_boot = nn->boot_time; 12421da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 1245deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1246deda2faaSJ. Bruce Fields { 1247ab4684d1SChuck Lever __be32 verf[2]; 1248deda2faaSJ. Bruce Fields static u32 i; 12491da177e4SLinus Torvalds 1250ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1251ab4684d1SChuck Lever verf[1] = (__be32)i++; 1252ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds 125538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12564581d140SJ. Bruce Fields { 125738c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12584581d140SJ. Bruce Fields } 12594d71ab87SJ. Bruce Fields 126038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1261f459e453SJ. Bruce Fields { 1262f459e453SJ. Bruce Fields struct nfs4_stid *s; 1263f459e453SJ. Bruce Fields 126438c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1265f459e453SJ. Bruce Fields if (!s) 1266f459e453SJ. Bruce Fields return NULL; 1267f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12684d71ab87SJ. Bruce Fields return s; 12694581d140SJ. Bruce Fields return NULL; 12704581d140SJ. Bruce Fields } 12714581d140SJ. Bruce Fields 12722216d449SJeff Layton static struct nfs4_client *create_client(struct xdr_netobj name, 1273b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1274b09333c4SRicardo Labiaga { 1275b09333c4SRicardo Labiaga struct nfs4_client *clp; 1276b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 127703a4e1f6SJ. Bruce Fields int ret; 1278c212cecfSStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 1279c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 1280b09333c4SRicardo Labiaga 1281b09333c4SRicardo Labiaga clp = alloc_client(name); 1282b09333c4SRicardo Labiaga if (clp == NULL) 1283b09333c4SRicardo Labiaga return NULL; 1284b09333c4SRicardo Labiaga 1285792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 128603a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 128703a4e1f6SJ. Bruce Fields if (ret) { 1288c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 1289b09333c4SRicardo Labiaga free_client(clp); 1290c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1291b09333c4SRicardo Labiaga return NULL; 1292b09333c4SRicardo Labiaga } 129338c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 129446583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 129577a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1296b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1297b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1298b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1299b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13005ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13016ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 130257725155SJ. Bruce Fields nfsd4_init_callback(&clp->cl_cb_null); 130307cd4909SBenny Halevy clp->cl_time = get_seconds(); 1304b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1305b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1306b09333c4SRicardo Labiaga copy_verf(clp, verf); 1307b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1308b09333c4SRicardo Labiaga gen_confirm(clp); 1309edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1310c212cecfSStanislav Kinsbursky clp->net = net; 1311b09333c4SRicardo Labiaga return clp; 1312b09333c4SRicardo Labiaga } 1313b09333c4SRicardo Labiaga 1314fd39ca9aSNeilBrown static void 1315ac55fdc4SJeff Layton add_clp_to_name_tree(struct nfs4_client *new_clp, struct rb_root *root) 1316ac55fdc4SJeff Layton { 1317ac55fdc4SJeff Layton struct rb_node **new = &(root->rb_node), *parent = NULL; 1318ac55fdc4SJeff Layton struct nfs4_client *clp; 1319ac55fdc4SJeff Layton 1320ac55fdc4SJeff Layton while (*new) { 1321ac55fdc4SJeff Layton clp = rb_entry(*new, struct nfs4_client, cl_namenode); 1322ac55fdc4SJeff Layton parent = *new; 1323ac55fdc4SJeff Layton 1324ac55fdc4SJeff Layton if (compare_blob(&clp->cl_name, &new_clp->cl_name) > 0) 1325ac55fdc4SJeff Layton new = &((*new)->rb_left); 1326ac55fdc4SJeff Layton else 1327ac55fdc4SJeff Layton new = &((*new)->rb_right); 1328ac55fdc4SJeff Layton } 1329ac55fdc4SJeff Layton 1330ac55fdc4SJeff Layton rb_link_node(&new_clp->cl_namenode, parent, new); 1331ac55fdc4SJeff Layton rb_insert_color(&new_clp->cl_namenode, root); 1332ac55fdc4SJeff Layton } 1333ac55fdc4SJeff Layton 1334ac55fdc4SJeff Layton static struct nfs4_client * 1335ac55fdc4SJeff Layton find_clp_in_name_tree(struct xdr_netobj *name, struct rb_root *root) 1336ac55fdc4SJeff Layton { 1337ac55fdc4SJeff Layton long long cmp; 1338ac55fdc4SJeff Layton struct rb_node *node = root->rb_node; 1339ac55fdc4SJeff Layton struct nfs4_client *clp; 1340ac55fdc4SJeff Layton 1341ac55fdc4SJeff Layton while (node) { 1342ac55fdc4SJeff Layton clp = rb_entry(node, struct nfs4_client, cl_namenode); 1343ac55fdc4SJeff Layton cmp = compare_blob(&clp->cl_name, name); 1344ac55fdc4SJeff Layton if (cmp > 0) 1345ac55fdc4SJeff Layton node = node->rb_left; 1346ac55fdc4SJeff Layton else if (cmp < 0) 1347ac55fdc4SJeff Layton node = node->rb_right; 1348ac55fdc4SJeff Layton else 1349ac55fdc4SJeff Layton return clp; 1350ac55fdc4SJeff Layton } 1351ac55fdc4SJeff Layton return NULL; 1352ac55fdc4SJeff Layton } 1353ac55fdc4SJeff Layton 1354ac55fdc4SJeff Layton static void 1355ac55fdc4SJeff Layton add_to_unconfirmed(struct nfs4_client *clp) 13561da177e4SLinus Torvalds { 13571da177e4SLinus Torvalds unsigned int idhashval; 13580a7ec377SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 13591da177e4SLinus Torvalds 1360ac55fdc4SJeff Layton clear_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 1361a99454aaSStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->unconf_name_tree); 13621da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13630a7ec377SStanislav Kinsbursky list_add(&clp->cl_idhash, &nn->unconf_id_hashtbl[idhashval]); 136436acb66bSBenny Halevy renew_client(clp); 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds 1367fd39ca9aSNeilBrown static void 13681da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13691da177e4SLinus Torvalds { 13701da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13718daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 13748daae4dcSStanislav Kinsbursky list_move(&clp->cl_idhash, &nn->conf_id_hashtbl[idhashval]); 1375a99454aaSStanislav Kinsbursky rb_erase(&clp->cl_namenode, &nn->unconf_name_tree); 1376382a62e7SStanislav Kinsbursky add_clp_to_name_tree(clp, &nn->conf_name_tree); 1377ac55fdc4SJeff Layton set_bit(NFSD4_CLIENT_CONFIRMED, &clp->cl_flags); 13781da177e4SLinus Torvalds renew_client(clp); 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds static struct nfs4_client * 13828daae4dcSStanislav Kinsbursky find_confirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds struct nfs4_client *clp; 13851da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13861da177e4SLinus Torvalds 13878daae4dcSStanislav Kinsbursky list_for_each_entry(clp, &nn->conf_id_hashtbl[idhashval], cl_idhash) { 1388a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1389d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1390d15c077eSJ. Bruce Fields return NULL; 1391a50d2ad1SJ. Bruce Fields renew_client(clp); 13921da177e4SLinus Torvalds return clp; 13931da177e4SLinus Torvalds } 1394a50d2ad1SJ. Bruce Fields } 13951da177e4SLinus Torvalds return NULL; 13961da177e4SLinus Torvalds } 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds static struct nfs4_client * 13990a7ec377SStanislav Kinsbursky find_unconfirmed_client(clientid_t *clid, bool sessions, struct nfsd_net *nn) 14001da177e4SLinus Torvalds { 14011da177e4SLinus Torvalds struct nfs4_client *clp; 14021da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 14031da177e4SLinus Torvalds 14040a7ec377SStanislav Kinsbursky list_for_each_entry(clp, &nn->unconf_id_hashtbl[idhashval], cl_idhash) { 1405d15c077eSJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1406d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 1407d15c077eSJ. Bruce Fields return NULL; 14081da177e4SLinus Torvalds return clp; 14091da177e4SLinus Torvalds } 1410d15c077eSJ. Bruce Fields } 14111da177e4SLinus Torvalds return NULL; 14121da177e4SLinus Torvalds } 14131da177e4SLinus Torvalds 14146e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1415a1bcecd2SAndy Adamson { 14166e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1417a1bcecd2SAndy Adamson } 1418a1bcecd2SAndy Adamson 141928ce6054SNeilBrown static struct nfs4_client * 1420382a62e7SStanislav Kinsbursky find_confirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 142128ce6054SNeilBrown { 1422382a62e7SStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->conf_name_tree); 142328ce6054SNeilBrown } 142428ce6054SNeilBrown 142528ce6054SNeilBrown static struct nfs4_client * 1426a99454aaSStanislav Kinsbursky find_unconfirmed_client_by_name(struct xdr_netobj *name, struct nfsd_net *nn) 142728ce6054SNeilBrown { 1428a99454aaSStanislav Kinsbursky return find_clp_in_name_tree(name, &nn->unconf_name_tree); 142928ce6054SNeilBrown } 143028ce6054SNeilBrown 1431fd39ca9aSNeilBrown static void 14326f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 14331da177e4SLinus Torvalds { 143407263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14356f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14366f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14377077ecbaSJeff Layton unsigned short expected_family; 14381da177e4SLinus Torvalds 14397077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14407077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14417077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14427077ecbaSJeff Layton expected_family = AF_INET; 14437077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14447077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14457077ecbaSJeff Layton expected_family = AF_INET6; 14467077ecbaSJeff Layton else 14471da177e4SLinus Torvalds goto out_err; 14481da177e4SLinus Torvalds 1449c212cecfSStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(clp->net, se->se_callback_addr_val, 1450aa9a4ec7SJeff Layton se->se_callback_addr_len, 145107263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 145207263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1453aa9a4ec7SJeff Layton 145407263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14551da177e4SLinus Torvalds goto out_err; 1456aa9a4ec7SJeff Layton 145707263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 145807263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1459fbf4665fSJeff Layton 146007263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 146107263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1462849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14631da177e4SLinus Torvalds return; 14641da177e4SLinus Torvalds out_err: 146507263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 146607263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1467849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14681da177e4SLinus Torvalds "will not receive delegations\n", 14691da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14701da177e4SLinus Torvalds 14711da177e4SLinus Torvalds return; 14721da177e4SLinus Torvalds } 14731da177e4SLinus Torvalds 1474074fe897SAndy Adamson /* 1475557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1476074fe897SAndy Adamson */ 1477074fe897SAndy Adamson void 1478074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1479074fe897SAndy Adamson { 1480557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1481557ce264SAndy Adamson unsigned int base; 1482074fe897SAndy Adamson 1483557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1484074fe897SAndy Adamson 1485557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1486557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1487bf864a31SAndy Adamson 1488bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1489bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1490557ce264SAndy Adamson slot->sl_datalen = 0; 1491bf864a31SAndy Adamson return; 1492bf864a31SAndy Adamson } 1493557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1494557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1495557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1496557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1497557ce264SAndy Adamson slot->sl_datalen)) 1498557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1499557ce264SAndy Adamson return; 1500074fe897SAndy Adamson } 1501074fe897SAndy Adamson 1502074fe897SAndy Adamson /* 1503abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1504abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1505abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1506abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1507abfabf8cSAndy Adamson * 1508074fe897SAndy Adamson */ 1509abfabf8cSAndy Adamson static __be32 1510abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1511abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1512074fe897SAndy Adamson { 1513abfabf8cSAndy Adamson struct nfsd4_op *op; 1514abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1515074fe897SAndy Adamson 1516abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1517abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1518abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1519abfabf8cSAndy Adamson 1520abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 152173e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1522abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1523abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1524abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1525074fe897SAndy Adamson } 1526abfabf8cSAndy Adamson return op->status; 1527074fe897SAndy Adamson } 1528074fe897SAndy Adamson 1529074fe897SAndy Adamson /* 1530557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1531557ce264SAndy Adamson * session values. 1532074fe897SAndy Adamson */ 1533074fe897SAndy Adamson __be32 1534bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1535bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1536074fe897SAndy Adamson { 1537557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1538074fe897SAndy Adamson __be32 status; 1539074fe897SAndy Adamson 1540557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1541074fe897SAndy Adamson 1542abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1543abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1544abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1545abfabf8cSAndy Adamson return status; 1546074fe897SAndy Adamson 1547557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1548557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1549074fe897SAndy Adamson 1550557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1551557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1552557ce264SAndy Adamson status = slot->sl_status; 1553074fe897SAndy Adamson 1554074fe897SAndy Adamson return status; 1555074fe897SAndy Adamson } 1556074fe897SAndy Adamson 15570733d213SAndy Adamson /* 15580733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15590733d213SAndy Adamson */ 15600733d213SAndy Adamson static void 15610733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15620733d213SAndy Adamson { 15630733d213SAndy Adamson /* pNFS is not supported */ 15640733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15650733d213SAndy Adamson 15660733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15670733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15680733d213SAndy Adamson 15690733d213SAndy Adamson /* set the wire flags to return to client. */ 15700733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15710733d213SAndy Adamson } 15720733d213SAndy Adamson 1573631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1574631fc9eaSJ. Bruce Fields { 1575631fc9eaSJ. Bruce Fields /* 1576631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1577631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1578631fc9eaSJ. Bruce Fields * 1579631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1580631fc9eaSJ. Bruce Fields */ 15816eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15826eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15836eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1584631fc9eaSJ. Bruce Fields } 1585631fc9eaSJ. Bruce Fields 1586b37ad28bSAl Viro __be32 1587069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1588069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1589069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1590069b6ad4SAndy Adamson { 15910733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 159257b7b43bSJ. Bruce Fields __be32 status; 1593363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15940733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1595363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 159683e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 1597c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 15980733d213SAndy Adamson 1599363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 16000733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1601363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 16020733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1603363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 16040733d213SAndy Adamson 1605a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 16060733d213SAndy Adamson return nfserr_inval; 16070733d213SAndy Adamson 16080733d213SAndy Adamson /* Currently only support SP4_NONE */ 16090733d213SAndy Adamson switch (exid->spa_how) { 16100733d213SAndy Adamson case SP4_NONE: 16110733d213SAndy Adamson break; 1612063b0fb9SJ. Bruce Fields default: /* checked by xdr code */ 1613063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 16140733d213SAndy Adamson case SP4_SSV: 16150733d213SAndy Adamson case SP4_MACH_CRED: 16160733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 16170733d213SAndy Adamson } 16180733d213SAndy Adamson 16192dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 16200733d213SAndy Adamson nfs4_lock_state(); 1621382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&exid->clname, nn); 16220733d213SAndy Adamson if (conf) { 162383e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 162483e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 162583e08fd4SJ. Bruce Fields 1626136e658dSJ. Bruce Fields if (update) { 1627136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16282dbb269dSJ. Bruce Fields status = nfserr_inval; 1629e203d506SJ. Bruce Fields goto out; 1630e203d506SJ. Bruce Fields } 16312dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16320733d213SAndy Adamson status = nfserr_perm; 16330733d213SAndy Adamson goto out; 16340733d213SAndy Adamson } 16352dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16360733d213SAndy Adamson status = nfserr_not_same; 16370733d213SAndy Adamson goto out; 16380733d213SAndy Adamson } 1639136e658dSJ. Bruce Fields /* case 6 */ 16400733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16410733d213SAndy Adamson new = conf; 16420733d213SAndy Adamson goto out_copy; 16436ddbbbfeSMike Sager } 1644136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1645631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1646136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1647136e658dSJ. Bruce Fields goto out; 1648136e658dSJ. Bruce Fields } 1649b9831b59SJ. Bruce Fields expire_client(conf); 1650b9831b59SJ. Bruce Fields goto out_new; 1651631fc9eaSJ. Bruce Fields } 1652136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16530f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1654136e658dSJ. Bruce Fields new = conf; 1655136e658dSJ. Bruce Fields goto out_copy; 1656136e658dSJ. Bruce Fields } 16572dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16580733d213SAndy Adamson goto out_new; 16590733d213SAndy Adamson } 16606ddbbbfeSMike Sager 16612dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16620733d213SAndy Adamson status = nfserr_noent; 16630733d213SAndy Adamson goto out; 16640733d213SAndy Adamson } 16650733d213SAndy Adamson 1666a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&exid->clname, nn); 16672dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16680733d213SAndy Adamson expire_client(unconf); 16690733d213SAndy Adamson 16702dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16710733d213SAndy Adamson out_new: 16722216d449SJeff Layton new = create_client(exid->clname, rqstp, &verf); 16730733d213SAndy Adamson if (new == NULL) { 16744731030dSJ. Bruce Fields status = nfserr_jukebox; 16750733d213SAndy Adamson goto out; 16760733d213SAndy Adamson } 1677c116a0afSJ. Bruce Fields new->cl_minorversion = 1; 16780733d213SAndy Adamson 1679c212cecfSStanislav Kinsbursky gen_clid(new, nn); 1680ac55fdc4SJeff Layton add_to_unconfirmed(new); 16810733d213SAndy Adamson out_copy: 16820733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16830733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16840733d213SAndy Adamson 1685778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16860733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16870733d213SAndy Adamson 16880733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 168949557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16900733d213SAndy Adamson status = nfs_ok; 16910733d213SAndy Adamson 16920733d213SAndy Adamson out: 16930733d213SAndy Adamson nfs4_unlock_state(); 16940733d213SAndy Adamson return status; 1695069b6ad4SAndy Adamson } 1696069b6ad4SAndy Adamson 169757b7b43bSJ. Bruce Fields static __be32 169888e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1699b85d4c01SBenny Halevy { 170088e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 170188e588d5SAndy Adamson slot_seqid); 1702b85d4c01SBenny Halevy 1703b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 170488e588d5SAndy Adamson if (slot_inuse) { 170588e588d5SAndy Adamson if (seqid == slot_seqid) 1706b85d4c01SBenny Halevy return nfserr_jukebox; 1707b85d4c01SBenny Halevy else 1708b85d4c01SBenny Halevy return nfserr_seq_misordered; 1709b85d4c01SBenny Halevy } 1710f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 171188e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1712b85d4c01SBenny Halevy return nfs_ok; 171388e588d5SAndy Adamson if (seqid == slot_seqid) 1714b85d4c01SBenny Halevy return nfserr_replay_cache; 1715b85d4c01SBenny Halevy return nfserr_seq_misordered; 1716b85d4c01SBenny Halevy } 1717b85d4c01SBenny Halevy 171849557cc7SAndy Adamson /* 171949557cc7SAndy Adamson * Cache the create session result into the create session single DRC 172049557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 172149557cc7SAndy Adamson * Do this for solo or embedded create session operations. 172249557cc7SAndy Adamson */ 172349557cc7SAndy Adamson static void 172449557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 172557b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 172649557cc7SAndy Adamson { 172749557cc7SAndy Adamson slot->sl_status = nfserr; 172849557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 172949557cc7SAndy Adamson } 173049557cc7SAndy Adamson 173149557cc7SAndy Adamson static __be32 173249557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 173349557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 173449557cc7SAndy Adamson { 173549557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 173649557cc7SAndy Adamson return slot->sl_status; 173749557cc7SAndy Adamson } 173849557cc7SAndy Adamson 17391b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17401b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17411b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17421b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17431b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17441b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17451b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17461b74c25bSMi Jinlong 17471b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17481b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17491b74c25bSMi Jinlong 1 + /* status */ \ 17501b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17511b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17521b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17531b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17541b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17551b74c25bSMi Jinlong 175657b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17571b74c25bSMi Jinlong { 17581b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17591b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17601b74c25bSMi Jinlong } 17611b74c25bSMi Jinlong 1762069b6ad4SAndy Adamson __be32 1763069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1764069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1765069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1766069b6ad4SAndy Adamson { 1767363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1768ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1769ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 177081f0b2a4SJ. Bruce Fields struct nfsd4_conn *conn; 177149557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 177257b7b43bSJ. Bruce Fields __be32 status = 0; 17738daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1774ec6b5d7bSAndy Adamson 1775a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1776a62573dcSMi Jinlong return nfserr_inval; 177749730501SJ. Bruce Fields if (check_forechannel_attrs(cr_ses->fore_channel)) 177849730501SJ. Bruce Fields return nfserr_toosmall; 177981f0b2a4SJ. Bruce Fields new = alloc_session(&cr_ses->fore_channel); 178081f0b2a4SJ. Bruce Fields if (!new) 178181f0b2a4SJ. Bruce Fields return nfserr_jukebox; 178281f0b2a4SJ. Bruce Fields status = nfserr_jukebox; 178381f0b2a4SJ. Bruce Fields conn = alloc_conn_from_crses(rqstp, cr_ses); 178481f0b2a4SJ. Bruce Fields if (!conn) 178581f0b2a4SJ. Bruce Fields goto out_free_session; 1786a62573dcSMi Jinlong 1787ec6b5d7bSAndy Adamson nfs4_lock_state(); 17880a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&cr_ses->clientid, true, nn); 17898daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&cr_ses->clientid, true, nn); 1790ec6b5d7bSAndy Adamson 1791ec6b5d7bSAndy Adamson if (conf) { 179249557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 179349557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 179438eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 179549557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 179681f0b2a4SJ. Bruce Fields goto out_free_conn; 179749557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1798ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 179981f0b2a4SJ. Bruce Fields goto out_free_conn; 1800ec6b5d7bSAndy Adamson } 1801ec6b5d7bSAndy Adamson } else if (unconf) { 18028f9d3d3bSJ. Bruce Fields struct nfs4_client *old; 1803ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1804363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1805ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 180681f0b2a4SJ. Bruce Fields goto out_free_conn; 1807ec6b5d7bSAndy Adamson } 180849557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 180949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 181038eb76a5SAndy Adamson if (status) { 181138eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1812ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 181381f0b2a4SJ. Bruce Fields goto out_free_conn; 1814ec6b5d7bSAndy Adamson } 1815382a62e7SStanislav Kinsbursky old = find_confirmed_client_by_name(&unconf->cl_name, nn); 18168f9d3d3bSJ. Bruce Fields if (old) 18178f9d3d3bSJ. Bruce Fields expire_client(old); 18188f9d3d3bSJ. Bruce Fields move_to_confirmed(unconf); 1819ec6b5d7bSAndy Adamson conf = unconf; 1820ec6b5d7bSAndy Adamson } else { 1821ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 182281f0b2a4SJ. Bruce Fields goto out_free_conn; 1823ec6b5d7bSAndy Adamson } 182481f0b2a4SJ. Bruce Fields status = nfs_ok; 18258323c3b2SJ. Bruce Fields /* 1826408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1827408b79bcSJ. Bruce Fields */ 1828408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1829408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1830408b79bcSJ. Bruce Fields 183181f0b2a4SJ. Bruce Fields init_session(rqstp, new, conf, cr_ses); 183281f0b2a4SJ. Bruce Fields nfsd4_init_conn(rqstp, conn, new); 183381f0b2a4SJ. Bruce Fields 1834ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1835ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 183612050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 183712050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 183886c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 183949557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1840ec6b5d7bSAndy Adamson 184149557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 184249557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1843ec6b5d7bSAndy Adamson out: 1844ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1845ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1846ec6b5d7bSAndy Adamson return status; 184781f0b2a4SJ. Bruce Fields out_free_conn: 184881f0b2a4SJ. Bruce Fields free_conn(conn); 184981f0b2a4SJ. Bruce Fields out_free_session: 185081f0b2a4SJ. Bruce Fields __free_session(new); 185181f0b2a4SJ. Bruce Fields goto out; 1852069b6ad4SAndy Adamson } 1853069b6ad4SAndy Adamson 185457716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 185557716355SJ. Bruce Fields { 185657716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 185757716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 185857716355SJ. Bruce Fields 185957716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 186057716355SJ. Bruce Fields } 186157716355SJ. Bruce Fields 18621d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18631d1bc8f2SJ. Bruce Fields { 18641d1bc8f2SJ. Bruce Fields switch (*dir) { 18651d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18661d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18671d1bc8f2SJ. Bruce Fields return nfs_ok; 18681d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18691d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18701d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18711d1bc8f2SJ. Bruce Fields return nfs_ok; 18721d1bc8f2SJ. Bruce Fields }; 18731d1bc8f2SJ. Bruce Fields return nfserr_inval; 18741d1bc8f2SJ. Bruce Fields } 18751d1bc8f2SJ. Bruce Fields 1876cb73a9f4SJ. Bruce Fields __be32 nfsd4_backchannel_ctl(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_backchannel_ctl *bc) 1877cb73a9f4SJ. Bruce Fields { 1878cb73a9f4SJ. Bruce Fields struct nfsd4_session *session = cstate->session; 1879c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 1880cb73a9f4SJ. Bruce Fields 1881c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 1882cb73a9f4SJ. Bruce Fields session->se_cb_prog = bc->bc_cb_program; 1883cb73a9f4SJ. Bruce Fields session->se_cb_sec = bc->bc_cb_sec; 1884c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1885cb73a9f4SJ. Bruce Fields 1886cb73a9f4SJ. Bruce Fields nfsd4_probe_callback(session->se_client); 1887cb73a9f4SJ. Bruce Fields 1888cb73a9f4SJ. Bruce Fields return nfs_ok; 1889cb73a9f4SJ. Bruce Fields } 1890cb73a9f4SJ. Bruce Fields 18911d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18921d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18931d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18941d1bc8f2SJ. Bruce Fields { 18951d1bc8f2SJ. Bruce Fields __be32 status; 18963ba63671SJ. Bruce Fields struct nfsd4_conn *conn; 1897c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 18981d1bc8f2SJ. Bruce Fields 18991d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 19001d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 1901c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 19021872de0eSStanislav Kinsbursky cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid, SVC_NET(rqstp)); 19031d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 19041d1bc8f2SJ. Bruce Fields * client_lock iself: */ 19051d1bc8f2SJ. Bruce Fields if (cstate->session) { 19061d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 19071d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 19081d1bc8f2SJ. Bruce Fields } 1909c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 19101d1bc8f2SJ. Bruce Fields if (!cstate->session) 19111d1bc8f2SJ. Bruce Fields return nfserr_badsession; 19121d1bc8f2SJ. Bruce Fields 19131d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 19143ba63671SJ. Bruce Fields if (status) 19151db2b9ddSBryan Schumaker return status; 19163ba63671SJ. Bruce Fields conn = alloc_conn(rqstp, bcts->dir); 19173ba63671SJ. Bruce Fields if (!conn) 19183ba63671SJ. Bruce Fields return nfserr_jukebox; 1919e1ff371fSJ. Bruce Fields nfsd4_init_conn(rqstp, conn, cstate->session); 19203ba63671SJ. Bruce Fields return nfs_ok; 19211d1bc8f2SJ. Bruce Fields } 19221d1bc8f2SJ. Bruce Fields 19235d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 19245d4cec2fSJ. Bruce Fields { 19255d4cec2fSJ. Bruce Fields if (!session) 19265d4cec2fSJ. Bruce Fields return 0; 19275d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 19285d4cec2fSJ. Bruce Fields } 19295d4cec2fSJ. Bruce Fields 1930069b6ad4SAndy Adamson __be32 1931069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1932069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1933069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1934069b6ad4SAndy Adamson { 1935e10e0cfcSBenny Halevy struct nfsd4_session *ses; 193657b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1937c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(r), nfsd_net_id); 1938e10e0cfcSBenny Halevy 1939e10e0cfcSBenny Halevy /* Notes: 1940e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1941e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1942e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1943e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1944e10e0cfcSBenny Halevy */ 1945e10e0cfcSBenny Halevy 19465d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 194757716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 194857716355SJ. Bruce Fields return nfserr_not_only_op; 194957716355SJ. Bruce Fields } 1950e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 1951c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 19521872de0eSStanislav Kinsbursky ses = find_in_sessionid_hashtbl(&sessionid->sessionid, SVC_NET(r)); 1953e10e0cfcSBenny Halevy if (!ses) { 1954c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1955e10e0cfcSBenny Halevy goto out; 1956e10e0cfcSBenny Halevy } 1957e10e0cfcSBenny Halevy 1958e10e0cfcSBenny Halevy unhash_session(ses); 1959c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1960e10e0cfcSBenny Halevy 1961ab707e15SBenny Halevy nfs4_lock_state(); 196284f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1963ab707e15SBenny Halevy nfs4_unlock_state(); 196419cf5c02SJ. Bruce Fields 1965c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 196619cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1967508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1968c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 1969e10e0cfcSBenny Halevy status = nfs_ok; 1970e10e0cfcSBenny Halevy out: 1971e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1972e10e0cfcSBenny Halevy return status; 1973069b6ad4SAndy Adamson } 1974069b6ad4SAndy Adamson 1975a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1976328ead28SJ. Bruce Fields { 1977328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1978328ead28SJ. Bruce Fields 1979328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1980a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1981328ead28SJ. Bruce Fields return c; 1982328ead28SJ. Bruce Fields } 1983328ead28SJ. Bruce Fields } 1984328ead28SJ. Bruce Fields return NULL; 1985328ead28SJ. Bruce Fields } 1986328ead28SJ. Bruce Fields 1987a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1988328ead28SJ. Bruce Fields { 1989328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1990a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 199121b75b01SJ. Bruce Fields int ret; 1992328ead28SJ. Bruce Fields 1993328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1994a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1995328ead28SJ. Bruce Fields if (c) { 1996328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1997328ead28SJ. Bruce Fields free_conn(new); 1998328ead28SJ. Bruce Fields return; 1999328ead28SJ. Bruce Fields } 2000328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 2001328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 200221b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 200321b75b01SJ. Bruce Fields if (ret) 200421b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 200521b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 2006328ead28SJ. Bruce Fields return; 2007328ead28SJ. Bruce Fields } 2008328ead28SJ. Bruce Fields 2009868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 2010868b89c3SMi Jinlong { 2011868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 2012868b89c3SMi Jinlong 2013868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 2014868b89c3SMi Jinlong } 2015868b89c3SMi Jinlong 2016ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 2017ae82a8d0SMi Jinlong struct nfsd4_session *session) 2018ae82a8d0SMi Jinlong { 2019ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 2020ae82a8d0SMi Jinlong 2021ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 2022ae82a8d0SMi Jinlong } 2023ae82a8d0SMi Jinlong 2024069b6ad4SAndy Adamson __be32 2025b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 2026069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 2027069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 2028069b6ad4SAndy Adamson { 2029f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 2030b85d4c01SBenny Halevy struct nfsd4_session *session; 2031b85d4c01SBenny Halevy struct nfsd4_slot *slot; 2032a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 203357b7b43bSJ. Bruce Fields __be32 status; 2034c9a49628SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2035b85d4c01SBenny Halevy 2036f9bb94c4SAndy Adamson if (resp->opcnt != 1) 2037f9bb94c4SAndy Adamson return nfserr_sequence_pos; 2038f9bb94c4SAndy Adamson 2039a663bdd8SJ. Bruce Fields /* 2040a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 2041a663bdd8SJ. Bruce Fields * below. 2042a663bdd8SJ. Bruce Fields */ 2043a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 2044a663bdd8SJ. Bruce Fields if (!conn) 2045a663bdd8SJ. Bruce Fields return nfserr_jukebox; 2046a663bdd8SJ. Bruce Fields 2047c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 2048b85d4c01SBenny Halevy status = nfserr_badsession; 20491872de0eSStanislav Kinsbursky session = find_in_sessionid_hashtbl(&seq->sessionid, SVC_NET(rqstp)); 2050b85d4c01SBenny Halevy if (!session) 2051b85d4c01SBenny Halevy goto out; 2052b85d4c01SBenny Halevy 2053868b89c3SMi Jinlong status = nfserr_too_many_ops; 2054868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2055868b89c3SMi Jinlong goto out; 2056868b89c3SMi Jinlong 2057ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2058ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2059ae82a8d0SMi Jinlong goto out; 2060ae82a8d0SMi Jinlong 2061b85d4c01SBenny Halevy status = nfserr_badslot; 20626c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2063b85d4c01SBenny Halevy goto out; 2064b85d4c01SBenny Halevy 2065557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2066b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2067b85d4c01SBenny Halevy 2068a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2069a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2070a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2071a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2072a8dfdaebSAndy Adamson 207373e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 207473e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2075b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2076bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2077bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2078bf5c43c8SJ. Bruce Fields goto out; 2079b85d4c01SBenny Halevy cstate->slot = slot; 2080b85d4c01SBenny Halevy cstate->session = session; 2081da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2082557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2083bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2084da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2085aaf84eb9SBenny Halevy goto out; 2086b85d4c01SBenny Halevy } 2087b85d4c01SBenny Halevy if (status) 2088b85d4c01SBenny Halevy goto out; 2089b85d4c01SBenny Halevy 2090a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2091a663bdd8SJ. Bruce Fields conn = NULL; 2092328ead28SJ. Bruce Fields 2093b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2094b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2095bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 209673e79482SJ. Bruce Fields if (seq->cachethis) 209773e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2098bf5c43c8SJ. Bruce Fields else 2099bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2100b85d4c01SBenny Halevy 2101b85d4c01SBenny Halevy cstate->slot = slot; 2102b85d4c01SBenny Halevy cstate->session = session; 2103b85d4c01SBenny Halevy 2104b85d4c01SBenny Halevy out: 210526c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2106aaf84eb9SBenny Halevy if (cstate->session) { 21070d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 21080d7bb719SJ. Bruce Fields 210936acb66bSBenny Halevy nfsd4_get_session(cstate->session); 21100d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 21115423732aSBenny Halevy switch (clp->cl_cb_state) { 21125423732aSBenny Halevy case NFSD4_CB_DOWN: 2113fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 21145423732aSBenny Halevy break; 21155423732aSBenny Halevy case NFSD4_CB_FAULT: 2116fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 21175423732aSBenny Halevy break; 2118fc0c3dd1SBenny Halevy default: 2119fc0c3dd1SBenny Halevy seq->status_flags = 0; 21205423732aSBenny Halevy } 2121aaf84eb9SBenny Halevy } 2122a663bdd8SJ. Bruce Fields kfree(conn); 2123c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 2124b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2125b85d4c01SBenny Halevy return status; 2126069b6ad4SAndy Adamson } 2127069b6ad4SAndy Adamson 2128345c2842SMi Jinlong __be32 2129345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2130345c2842SMi Jinlong { 2131345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 213257b7b43bSJ. Bruce Fields __be32 status = 0; 21338daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2134345c2842SMi Jinlong 2135345c2842SMi Jinlong nfs4_lock_state(); 21360a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(&dc->clientid, true, nn); 21378daae4dcSStanislav Kinsbursky conf = find_confirmed_client(&dc->clientid, true, nn); 2138345c2842SMi Jinlong 2139345c2842SMi Jinlong if (conf) { 2140345c2842SMi Jinlong clp = conf; 2141345c2842SMi Jinlong 21426eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2143345c2842SMi Jinlong status = nfserr_clientid_busy; 2144345c2842SMi Jinlong goto out; 2145345c2842SMi Jinlong } 2146345c2842SMi Jinlong 2147345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2148345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2149345c2842SMi Jinlong status = nfserr_clientid_busy; 2150345c2842SMi Jinlong goto out; 2151345c2842SMi Jinlong } 2152345c2842SMi Jinlong } else if (unconf) 2153345c2842SMi Jinlong clp = unconf; 2154345c2842SMi Jinlong else { 2155345c2842SMi Jinlong status = nfserr_stale_clientid; 2156345c2842SMi Jinlong goto out; 2157345c2842SMi Jinlong } 2158345c2842SMi Jinlong 2159345c2842SMi Jinlong expire_client(clp); 2160345c2842SMi Jinlong out: 2161345c2842SMi Jinlong nfs4_unlock_state(); 2162345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2163345c2842SMi Jinlong return status; 2164345c2842SMi Jinlong } 2165345c2842SMi Jinlong 2166069b6ad4SAndy Adamson __be32 21674dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21684dc6ec00SJ. Bruce Fields { 216957b7b43bSJ. Bruce Fields __be32 status = 0; 2170bcecf1ccSMi Jinlong 21714dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21724dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21734dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21744dc6ec00SJ. Bruce Fields /* 21754dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21764dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21774dc6ec00SJ. Bruce Fields */ 21784dc6ec00SJ. Bruce Fields return nfs_ok; 21794dc6ec00SJ. Bruce Fields } 2180bcecf1ccSMi Jinlong 21814dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2182bcecf1ccSMi Jinlong status = nfserr_complete_already; 2183a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2184a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2185bcecf1ccSMi Jinlong goto out; 2186bcecf1ccSMi Jinlong 2187bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2188bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21894dc6ec00SJ. Bruce Fields /* 21904dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21914dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21924dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21934dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21944dc6ec00SJ. Bruce Fields * client. 21954dc6ec00SJ. Bruce Fields */ 2196bcecf1ccSMi Jinlong goto out; 2197bcecf1ccSMi Jinlong 2198bcecf1ccSMi Jinlong status = nfs_ok; 21992a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2200bcecf1ccSMi Jinlong out: 22014dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2202bcecf1ccSMi Jinlong return status; 22034dc6ec00SJ. Bruce Fields } 22044dc6ec00SJ. Bruce Fields 22054dc6ec00SJ. Bruce Fields __be32 2206b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2207b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 22081da177e4SLinus Torvalds { 2209a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 22101da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 221128ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2212b37ad28bSAl Viro __be32 status; 2213c212cecfSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 2214a55370a3SNeilBrown 221563db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 22161da177e4SLinus Torvalds nfs4_lock_state(); 2217382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&clname, nn); 221828ce6054SNeilBrown if (conf) { 221963db4632SJ. Bruce Fields /* case 0: */ 22201da177e4SLinus Torvalds status = nfserr_clid_inuse; 2221e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2222e203d506SJ. Bruce Fields goto out; 2223026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2224363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2225363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2226363168b4SJeff Layton sizeof(addr_str)); 2227026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2228363168b4SJeff Layton "at %s\n", addr_str); 22291da177e4SLinus Torvalds goto out; 22301da177e4SLinus Torvalds } 22311da177e4SLinus Torvalds } 2232a99454aaSStanislav Kinsbursky unconf = find_unconfirmed_client_by_name(&clname, nn); 22331da177e4SLinus Torvalds if (unconf) 22341da177e4SLinus Torvalds expire_client(unconf); 22358f930711SJ. Bruce Fields status = nfserr_jukebox; 22362216d449SJeff Layton new = create_client(clname, rqstp, &clverifier); 2237a55370a3SNeilBrown if (new == NULL) 22381da177e4SLinus Torvalds goto out; 223934b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 224063db4632SJ. Bruce Fields /* case 1: probable callback update */ 22411da177e4SLinus Torvalds copy_clid(new, conf); 224234b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 2243c212cecfSStanislav Kinsbursky gen_clid(new, nn); 22448323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22456f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2246ac55fdc4SJeff Layton add_to_unconfirmed(new); 22471da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22481da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22491da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22501da177e4SLinus Torvalds status = nfs_ok; 22511da177e4SLinus Torvalds out: 22521da177e4SLinus Torvalds nfs4_unlock_state(); 22531da177e4SLinus Torvalds return status; 22541da177e4SLinus Torvalds } 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds 2257b37ad28bSAl Viro __be32 2258b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2259b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2260b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22611da177e4SLinus Torvalds { 226221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22631da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22641da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2265b37ad28bSAl Viro __be32 status; 22667f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 22671da177e4SLinus Torvalds 22682c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 22691da177e4SLinus Torvalds return nfserr_stale_clientid; 22701da177e4SLinus Torvalds nfs4_lock_state(); 227121ab45a4SNeilBrown 22728daae4dcSStanislav Kinsbursky conf = find_confirmed_client(clid, false, nn); 22730a7ec377SStanislav Kinsbursky unconf = find_unconfirmed_client(clid, false, nn); 2274a186e767SJ. Bruce Fields /* 22758695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22768695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22778695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22788695b90aSJ. Bruce Fields * bug. 2279a186e767SJ. Bruce Fields */ 22808695b90aSJ. Bruce Fields status = nfserr_serverfault; 22818695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22828695b90aSJ. Bruce Fields goto out; 22838695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22848695b90aSJ. Bruce Fields goto out; 228563db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 228690d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 228790d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 228890d700b7SJ. Bruce Fields status = nfs_ok; 228990d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 229090d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 229190d700b7SJ. Bruce Fields goto out; 229290d700b7SJ. Bruce Fields } 229390d700b7SJ. Bruce Fields status = nfs_ok; 229490d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22955a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22965a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22971a69c179SNeilBrown expire_client(unconf); 229890d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 2299382a62e7SStanislav Kinsbursky conf = find_confirmed_client_by_name(&unconf->cl_name, nn); 23000d22f68fSJ. Bruce Fields if (conf) 23011a69c179SNeilBrown expire_client(conf); 23021da177e4SLinus Torvalds move_to_confirmed(unconf); 2303f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 230408e8987cSNeilBrown } 23051da177e4SLinus Torvalds out: 23061da177e4SLinus Torvalds nfs4_unlock_state(); 23071da177e4SLinus Torvalds return status; 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds 231032513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23111da177e4SLinus Torvalds { 231232513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 231332513b40SJ. Bruce Fields } 231432513b40SJ. Bruce Fields 231532513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 231632513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 231732513b40SJ. Bruce Fields { 23181da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23191da177e4SLinus Torvalds 23208b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23211da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23228beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23238beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23241da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 232547f9940cSMeelap Shah fp->fi_had_conflict = false; 2326acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2327f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2328f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 232947cee541SPavel Emelyanov spin_lock(&recall_lock); 233047cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 233147cee541SPavel Emelyanov spin_unlock(&recall_lock); 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds static void 2335e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2336e60d4398SNeilBrown { 2337e60d4398SNeilBrown if (*slab == NULL) 2338e60d4398SNeilBrown return; 23391a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2340e60d4398SNeilBrown *slab = NULL; 2341e60d4398SNeilBrown } 2342e60d4398SNeilBrown 2343e8ff2a84SJ. Bruce Fields void 2344e60d4398SNeilBrown nfsd4_free_slabs(void) 2345e60d4398SNeilBrown { 2346fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2347fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2348e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23495ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23505b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2351e60d4398SNeilBrown } 23521da177e4SLinus Torvalds 235372083396SBryan Schumaker int 23541da177e4SLinus Torvalds nfsd4_init_slabs(void) 23551da177e4SLinus Torvalds { 2356fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2357fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2358fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2359fe0750e5SJ. Bruce Fields goto out_nomem; 2360fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 23613c40794bSYanchuan Nian sizeof(struct nfs4_lockowner), 0, 0, NULL); 2362fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2363e60d4398SNeilBrown goto out_nomem; 2364e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 236520c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2366e60d4398SNeilBrown if (file_slab == NULL) 2367e60d4398SNeilBrown goto out_nomem; 23685ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2369dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23705ac049acSNeilBrown if (stateid_slab == NULL) 23715ac049acSNeilBrown goto out_nomem; 23725b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 237320c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23745b2d21c1SNeilBrown if (deleg_slab == NULL) 23755b2d21c1SNeilBrown goto out_nomem; 2376e60d4398SNeilBrown return 0; 2377e60d4398SNeilBrown out_nomem: 2378e60d4398SNeilBrown nfsd4_free_slabs(); 23791da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23801da177e4SLinus Torvalds return -ENOMEM; 23811da177e4SLinus Torvalds } 23821da177e4SLinus Torvalds 2383fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23841da177e4SLinus Torvalds { 2385fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2386fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2387fe0750e5SJ. Bruce Fields } 2388fe0750e5SJ. Bruce Fields 2389fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2390fe0750e5SJ. Bruce Fields { 2391fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2392fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23931da177e4SLinus Torvalds } 23941da177e4SLinus Torvalds 2395ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2396ff194bd9SJ. Bruce Fields { 2397ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2398ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2399ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2400ff194bd9SJ. Bruce Fields } 2401ff194bd9SJ. Bruce Fields 2402fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 24031da177e4SLinus Torvalds { 24041da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24051da177e4SLinus Torvalds 2406fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2407ff194bd9SJ. Bruce Fields if (!sop) 2408ff194bd9SJ. Bruce Fields return NULL; 2409ff194bd9SJ. Bruce Fields 2410ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2411ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2412fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2413ff194bd9SJ. Bruce Fields return NULL; 2414ff194bd9SJ. Bruce Fields } 24151da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2416ff194bd9SJ. Bruce Fields 2417ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2418ff194bd9SJ. Bruce Fields sop->so_client = clp; 2419ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24201da177e4SLinus Torvalds return sop; 24211da177e4SLinus Torvalds } 2422ff194bd9SJ. Bruce Fields 2423fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2424ff194bd9SJ. Bruce Fields { 24259b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 24269b531137SStanislav Kinsbursky 24279b531137SStanislav Kinsbursky list_add(&oo->oo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 2428fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24291da177e4SLinus Torvalds } 24301da177e4SLinus Torvalds 2431fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24321da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2433fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24341da177e4SLinus Torvalds 2435fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2436fe0750e5SJ. Bruce Fields if (!oo) 24371da177e4SLinus Torvalds return NULL; 2438fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2439fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2440d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2441fe0750e5SJ. Bruce Fields oo->oo_time = 0; 244238c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2443fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2444fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2445fe0750e5SJ. Bruce Fields return oo; 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 2448996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2449fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2450d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24511da177e4SLinus Torvalds 2452996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2453ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2454fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24558beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2456fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 245713cd2184SNeilBrown get_nfs4_file(fp); 24581da177e4SLinus Torvalds stp->st_file = fp; 24591da177e4SLinus Torvalds stp->st_access_bmap = 0; 24601da177e4SLinus Torvalds stp->st_deny_bmap = 0; 246182c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2462ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24634c4cd222SNeilBrown stp->st_openstp = NULL; 24641da177e4SLinus Torvalds } 24651da177e4SLinus Torvalds 24661da177e4SLinus Torvalds static void 246773758fedSStanislav Kinsbursky move_to_close_lru(struct nfs4_openowner *oo, struct net *net) 24681da177e4SLinus Torvalds { 246973758fedSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 247073758fedSStanislav Kinsbursky 2471fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24721da177e4SLinus Torvalds 247373758fedSStanislav Kinsbursky list_move_tail(&oo->oo_close_lru, &nn->close_lru); 2474fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24751da177e4SLinus Torvalds } 24761da177e4SLinus Torvalds 24771da177e4SLinus Torvalds static int 2478599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2479599e0a22SJ. Bruce Fields clientid_t *clid) 2480599e0a22SJ. Bruce Fields { 2481599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2482599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2483599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24841da177e4SLinus Torvalds } 24851da177e4SLinus Torvalds 2486fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24879b531137SStanislav Kinsbursky find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open, 24889b531137SStanislav Kinsbursky bool sessions, struct nfsd_net *nn) 24891da177e4SLinus Torvalds { 2490a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2491a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 2492d15c077eSJ. Bruce Fields struct nfs4_client *clp; 24931da177e4SLinus Torvalds 24949b531137SStanislav Kinsbursky list_for_each_entry(so, &nn->ownerstr_hashtbl[hashval], so_strhash) { 249516bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 249616bfdaafSJ. Bruce Fields continue; 2497a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2498a50d2ad1SJ. Bruce Fields oo = openowner(so); 2499d15c077eSJ. Bruce Fields clp = oo->oo_owner.so_client; 2500d15c077eSJ. Bruce Fields if ((bool)clp->cl_minorversion != sessions) 2501d15c077eSJ. Bruce Fields return NULL; 2502a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2503a50d2ad1SJ. Bruce Fields return oo; 2504a50d2ad1SJ. Bruce Fields } 25051da177e4SLinus Torvalds } 25061da177e4SLinus Torvalds return NULL; 25071da177e4SLinus Torvalds } 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25101da177e4SLinus Torvalds static struct nfs4_file * 25111da177e4SLinus Torvalds find_file(struct inode *ino) 25121da177e4SLinus Torvalds { 25131da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25141da177e4SLinus Torvalds struct nfs4_file *fp; 25151da177e4SLinus Torvalds 25168b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25171da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 251813cd2184SNeilBrown if (fp->fi_inode == ino) { 251913cd2184SNeilBrown get_nfs4_file(fp); 25208b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25211da177e4SLinus Torvalds return fp; 25221da177e4SLinus Torvalds } 252313cd2184SNeilBrown } 25248b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25251da177e4SLinus Torvalds return NULL; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 25284f83aa30SJ. Bruce Fields /* 25291da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25301da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25311da177e4SLinus Torvalds */ 2532b37ad28bSAl Viro static __be32 25331da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25341da177e4SLinus Torvalds { 25351da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25361da177e4SLinus Torvalds struct nfs4_file *fp; 2537dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2538b37ad28bSAl Viro __be32 ret; 25391da177e4SLinus Torvalds 25401da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds fp = find_file(ino); 254313cd2184SNeilBrown if (!fp) 254413cd2184SNeilBrown return nfs_ok; 2545b700949bSNeilBrown ret = nfserr_locked; 25461da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25478beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2548ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2549ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 255013cd2184SNeilBrown goto out; 25511da177e4SLinus Torvalds } 255213cd2184SNeilBrown ret = nfs_ok; 255313cd2184SNeilBrown out: 255413cd2184SNeilBrown put_nfs4_file(fp); 255513cd2184SNeilBrown return ret; 25561da177e4SLinus Torvalds } 25571da177e4SLinus Torvalds 25586b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25591da177e4SLinus Torvalds { 25601da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25611da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25621da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25631da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25641da177e4SLinus Torvalds * it's safe to take a reference: */ 25651da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25661da177e4SLinus Torvalds 25671da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25681da177e4SLinus Torvalds 2569460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25701da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25711da177e4SLinus Torvalds 25726b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25736b57d9c8SJ. Bruce Fields } 25746b57d9c8SJ. Bruce Fields 2575acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25766b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25776b57d9c8SJ. Bruce Fields { 2578acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2579acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25806b57d9c8SJ. Bruce Fields 25817fa10cd1SJ. Bruce Fields if (!fp) { 25827fa10cd1SJ. Bruce Fields WARN(1, "(%p)->fl_owner NULL\n", fl); 25837fa10cd1SJ. Bruce Fields return; 25847fa10cd1SJ. Bruce Fields } 25857fa10cd1SJ. Bruce Fields if (fp->fi_had_conflict) { 25867fa10cd1SJ. Bruce Fields WARN(1, "duplicate break on %p\n", fp); 25877fa10cd1SJ. Bruce Fields return; 25887fa10cd1SJ. Bruce Fields } 25890272e1fdSJ. Bruce Fields /* 25900272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2591acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25926b57d9c8SJ. Bruce Fields * in time: 25930272e1fdSJ. Bruce Fields */ 25940272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25951da177e4SLinus Torvalds 25965d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2597acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2598acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25995d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 26005d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 26011da177e4SLinus Torvalds } 26021da177e4SLinus Torvalds 26031da177e4SLinus Torvalds static 26041da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 26051da177e4SLinus Torvalds { 26061da177e4SLinus Torvalds if (arg & F_UNLCK) 26071da177e4SLinus Torvalds return lease_modify(onlist, arg); 26081da177e4SLinus Torvalds else 26091da177e4SLinus Torvalds return -EAGAIN; 26101da177e4SLinus Torvalds } 26111da177e4SLinus Torvalds 26127b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 26138fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26148fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26151da177e4SLinus Torvalds }; 26161da177e4SLinus Torvalds 26177a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26187a8711c9SJ. Bruce Fields { 26197a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26207a8711c9SJ. Bruce Fields return nfs_ok; 26217a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26227a8711c9SJ. Bruce Fields return nfserr_replay_me; 26237a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26247a8711c9SJ. Bruce Fields return nfs_ok; 26257a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26267a8711c9SJ. Bruce Fields } 26271da177e4SLinus Torvalds 2628b37ad28bSAl Viro __be32 26296668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26303320fef1SStanislav Kinsbursky struct nfsd4_open *open, struct nfsd_net *nn) 26311da177e4SLinus Torvalds { 26321da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26331da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26341da177e4SLinus Torvalds unsigned int strhashval; 2635fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26364cdc951bSJ. Bruce Fields __be32 status; 26371da177e4SLinus Torvalds 26382c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&open->op_clientid, nn)) 26391da177e4SLinus Torvalds return nfserr_stale_clientid; 264032513b40SJ. Bruce Fields /* 264132513b40SJ. Bruce Fields * In case we need it later, after we've already created the 264232513b40SJ. Bruce Fields * file and don't want to risk a further failure: 264332513b40SJ. Bruce Fields */ 264432513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 264532513b40SJ. Bruce Fields if (open->op_file == NULL) 264632513b40SJ. Bruce Fields return nfserr_jukebox; 26471da177e4SLinus Torvalds 264816bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 26499b531137SStanislav Kinsbursky oo = find_openstateowner_str(strhashval, open, cstate->minorversion, nn); 2650fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2651fe0750e5SJ. Bruce Fields if (!oo) { 26528daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clientid, cstate->minorversion, 26538daae4dcSStanislav Kinsbursky nn); 26540f442aa2SJ. Bruce Fields if (clp == NULL) 26550f442aa2SJ. Bruce Fields return nfserr_expired; 2656bcf130f9SJ. Bruce Fields goto new_owner; 26570f442aa2SJ. Bruce Fields } 2658dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26590f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2660fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2661fe0750e5SJ. Bruce Fields release_openowner(oo); 2662fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2663bcf130f9SJ. Bruce Fields goto new_owner; 26640f442aa2SJ. Bruce Fields } 26654cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26664cdc951bSJ. Bruce Fields if (status) 26674cdc951bSJ. Bruce Fields return status; 26684cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26694cdc951bSJ. Bruce Fields goto alloc_stateid; 2670bcf130f9SJ. Bruce Fields new_owner: 2671fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2672fe0750e5SJ. Bruce Fields if (oo == NULL) 26733e772463SJ. Bruce Fields return nfserr_jukebox; 2674fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26754cdc951bSJ. Bruce Fields alloc_stateid: 26764cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26774cdc951bSJ. Bruce Fields if (!open->op_stp) 26784cdc951bSJ. Bruce Fields return nfserr_jukebox; 26790f442aa2SJ. Bruce Fields return nfs_ok; 26801da177e4SLinus Torvalds } 26811da177e4SLinus Torvalds 2682b37ad28bSAl Viro static inline __be32 26834a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26844a6e43e6SNeilBrown { 26854a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26864a6e43e6SNeilBrown return nfserr_openmode; 26874a6e43e6SNeilBrown else 26884a6e43e6SNeilBrown return nfs_ok; 26894a6e43e6SNeilBrown } 26904a6e43e6SNeilBrown 2691c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 269224a0111eSJ. Bruce Fields { 269324a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 269424a0111eSJ. Bruce Fields } 269524a0111eSJ. Bruce Fields 269638c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2697f459e453SJ. Bruce Fields { 2698f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2699f459e453SJ. Bruce Fields 270038c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2701f459e453SJ. Bruce Fields if (!ret) 2702f459e453SJ. Bruce Fields return NULL; 2703f459e453SJ. Bruce Fields return delegstateid(ret); 2704f459e453SJ. Bruce Fields } 2705f459e453SJ. Bruce Fields 27068b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 27078b289b2cSJ. Bruce Fields { 27088b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 27098b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 27108b289b2cSJ. Bruce Fields } 27118b289b2cSJ. Bruce Fields 2712b37ad28bSAl Viro static __be32 271338c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2714567d9829SNeilBrown struct nfs4_delegation **dp) 2715567d9829SNeilBrown { 2716567d9829SNeilBrown int flags; 2717b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2718567d9829SNeilBrown 271938c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2720567d9829SNeilBrown if (*dp == NULL) 2721c44c5eebSNeilBrown goto out; 272224a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2723567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2724567d9829SNeilBrown if (status) 2725567d9829SNeilBrown *dp = NULL; 2726c44c5eebSNeilBrown out: 27278b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2728c44c5eebSNeilBrown return nfs_ok; 2729c44c5eebSNeilBrown if (status) 2730c44c5eebSNeilBrown return status; 2731dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2732c44c5eebSNeilBrown return nfs_ok; 2733567d9829SNeilBrown } 2734567d9829SNeilBrown 2735b37ad28bSAl Viro static __be32 2736dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27371da177e4SLinus Torvalds { 2738dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2739fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27401da177e4SLinus Torvalds 27418beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27421da177e4SLinus Torvalds /* ignore lock owners */ 27431da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27441da177e4SLinus Torvalds continue; 27451da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2746fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27471da177e4SLinus Torvalds *stpp = local; 27481da177e4SLinus Torvalds /* check for conflicting share reservations */ 27491da177e4SLinus Torvalds if (!test_share(local, open)) 275077eaae8dSJ. Bruce Fields return nfserr_share_denied; 27511da177e4SLinus Torvalds } 275277eaae8dSJ. Bruce Fields return nfs_ok; 27531da177e4SLinus Torvalds } 27541da177e4SLinus Torvalds 275521fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 275621fb4016SJ. Bruce Fields { 275721fb4016SJ. Bruce Fields int flags = 0; 275821fb4016SJ. Bruce Fields 275921fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 276021fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 276121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 276221fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 276321fb4016SJ. Bruce Fields return flags; 276421fb4016SJ. Bruce Fields } 276521fb4016SJ. Bruce Fields 27660c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27670c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2768f9d7562fSJ. Bruce Fields { 2769f9d7562fSJ. Bruce Fields __be32 status; 27700c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27710c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27720c12eaffSCasey Bodley 2773f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2774f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2775f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2776f9d7562fSJ. Bruce Fields if (status) 2777f9d7562fSJ. Bruce Fields return status; 2778f9d7562fSJ. Bruce Fields } 2779f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2780f9d7562fSJ. Bruce Fields 2781f9d7562fSJ. Bruce Fields return nfs_ok; 2782f9d7562fSJ. Bruce Fields } 2783f9d7562fSJ. Bruce Fields 2784b37ad28bSAl Viro static inline __be32 27851da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27861da177e4SLinus Torvalds struct nfsd4_open *open) 27871da177e4SLinus Torvalds { 27881da177e4SLinus Torvalds struct iattr iattr = { 27891da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27901da177e4SLinus Torvalds .ia_size = 0, 27911da177e4SLinus Torvalds }; 27921da177e4SLinus Torvalds if (!open->op_truncate) 27931da177e4SLinus Torvalds return 0; 27941da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27959246585aSAl Viro return nfserr_inval; 27961da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27971da177e4SLinus Torvalds } 27981da177e4SLinus Torvalds 2799b37ad28bSAl Viro static __be32 2800dcef0413SJ. 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) 28011da177e4SLinus Torvalds { 2802b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 28037d947842SJ. Bruce Fields bool new_access; 2804b37ad28bSAl Viro __be32 status; 28051da177e4SLinus Torvalds 280682c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2807f9d7562fSJ. Bruce Fields if (new_access) { 28080c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2809f9d7562fSJ. Bruce Fields if (status) 2810f9d7562fSJ. Bruce Fields return status; 28116c26d08fSJ. Bruce Fields } 28121da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28131da177e4SLinus Torvalds if (status) { 2814f9d7562fSJ. Bruce Fields if (new_access) { 2815f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2816f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2817f9d7562fSJ. Bruce Fields } 28181da177e4SLinus Torvalds return status; 28191da177e4SLinus Torvalds } 28201da177e4SLinus Torvalds /* remember the open */ 282182c5ff1bSJeff Layton set_access(op_share_access, stp); 2822ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28231da177e4SLinus Torvalds 28241da177e4SLinus Torvalds return nfs_ok; 28251da177e4SLinus Torvalds } 28261da177e4SLinus Torvalds 28271da177e4SLinus Torvalds 28281da177e4SLinus Torvalds static void 28291255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28301da177e4SLinus Torvalds { 2831dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28321da177e4SLinus Torvalds } 28331da177e4SLinus Torvalds 283414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 283514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 283614a24e99SJ. Bruce Fields { 283714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 283814a24e99SJ. Bruce Fields return true; 283914a24e99SJ. Bruce Fields /* 284014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 284114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 284214a24e99SJ. Bruce Fields * until we hear otherwise: 284314a24e99SJ. Bruce Fields */ 284414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 284514a24e99SJ. Bruce Fields } 284614a24e99SJ. Bruce Fields 284722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 284822d38c4cSJ. Bruce Fields { 284922d38c4cSJ. Bruce Fields struct file_lock *fl; 285022d38c4cSJ. Bruce Fields 285122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 285222d38c4cSJ. Bruce Fields if (!fl) 285322d38c4cSJ. Bruce Fields return NULL; 285422d38c4cSJ. Bruce Fields locks_init_lock(fl); 285522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 285622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 285722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 285822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2859acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 286022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 286122d38c4cSJ. Bruce Fields return fl; 286222d38c4cSJ. Bruce Fields } 286322d38c4cSJ. Bruce Fields 2864edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2865edab9782SJ. Bruce Fields { 2866acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2867edab9782SJ. Bruce Fields struct file_lock *fl; 2868edab9782SJ. Bruce Fields int status; 2869edab9782SJ. Bruce Fields 2870edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2871edab9782SJ. Bruce Fields if (!fl) 2872edab9782SJ. Bruce Fields return -ENOMEM; 2873acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28742a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2875acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2876edab9782SJ. Bruce Fields if (status) { 2877acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2878edab9782SJ. Bruce Fields locks_free_lock(fl); 2879edab9782SJ. Bruce Fields return -ENOMEM; 2880edab9782SJ. Bruce Fields } 2881acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2882cb0942b8SAl Viro fp->fi_deleg_file = get_file(fl->fl_file); 2883acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2884acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2885acfdf5c3SJ. Bruce Fields return 0; 2886acfdf5c3SJ. Bruce Fields } 2887acfdf5c3SJ. Bruce Fields 2888acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2889acfdf5c3SJ. Bruce Fields { 2890acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2891acfdf5c3SJ. Bruce Fields 2892acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2893acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2894acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2895acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2896acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2897acfdf5c3SJ. Bruce Fields return -EAGAIN; 2898acfdf5c3SJ. Bruce Fields } 2899acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2900acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2901acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 29022a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2903edab9782SJ. Bruce Fields return 0; 2904edab9782SJ. Bruce Fields } 2905edab9782SJ. Bruce Fields 29064aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 29074aa8913cSBenny Halevy { 29084aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29094aa8913cSBenny Halevy if (status == -EAGAIN) 29104aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29114aa8913cSBenny Halevy else { 29124aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29134aa8913cSBenny Halevy switch (open->op_deleg_want) { 29144aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29154aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29164aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29174aa8913cSBenny Halevy break; 29184aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29194aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29204aa8913cSBenny Halevy break; 29214aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 2922063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 29234aa8913cSBenny Halevy } 29244aa8913cSBenny Halevy } 29254aa8913cSBenny Halevy } 29264aa8913cSBenny Halevy 29271da177e4SLinus Torvalds /* 29281da177e4SLinus Torvalds * Attempt to hand out a delegation. 29291da177e4SLinus Torvalds */ 29301da177e4SLinus Torvalds static void 29315ccb0066SStanislav Kinsbursky nfs4_open_delegation(struct net *net, struct svc_fh *fh, 29325ccb0066SStanislav Kinsbursky struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29331da177e4SLinus Torvalds { 29341da177e4SLinus Torvalds struct nfs4_delegation *dp; 2935fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 293614a24e99SJ. Bruce Fields int cb_up; 2937d24433cdSBenny Halevy int status = 0, flag = 0; 29381da177e4SLinus Torvalds 2939fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29401da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29417b190fecSNeilBrown open->op_recall = 0; 29427b190fecSNeilBrown switch (open->op_claim_type) { 29437b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29442bf23875SJ. Bruce Fields if (!cb_up) 29457b190fecSNeilBrown open->op_recall = 1; 29467b190fecSNeilBrown flag = open->op_delegate_type; 29477b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29481da177e4SLinus Torvalds goto out; 29497b190fecSNeilBrown break; 29507b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29517b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29527b190fecSNeilBrown * had the chance to reclaim theirs.... */ 29535ccb0066SStanislav Kinsbursky if (locks_in_grace(net)) 29547b190fecSNeilBrown goto out; 2955dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29567b190fecSNeilBrown goto out; 29571da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29581da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29591da177e4SLinus Torvalds else 29601da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29617b190fecSNeilBrown break; 29627b190fecSNeilBrown default: 29637b190fecSNeilBrown goto out; 29647b190fecSNeilBrown } 29651da177e4SLinus Torvalds 2966fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2967dd239cc0SJ. Bruce Fields if (dp == NULL) 2968dd239cc0SJ. Bruce Fields goto out_no_deleg; 2969acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2970edab9782SJ. Bruce Fields if (status) 2971dd239cc0SJ. Bruce Fields goto out_free; 29721da177e4SLinus Torvalds 2973d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29741da177e4SLinus Torvalds 29758c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2976d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29771da177e4SLinus Torvalds out: 29781da177e4SLinus Torvalds open->op_delegate_type = flag; 2979d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2980d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2981d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2982d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2983d24433cdSBenny Halevy 29844aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29854aa8913cSBenny Halevy if (open->op_deleg_want) 29864aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2987d24433cdSBenny Halevy } 2988dd239cc0SJ. Bruce Fields return; 2989dd239cc0SJ. Bruce Fields out_free: 2990acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2991dd239cc0SJ. Bruce Fields out_no_deleg: 2992dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2993dd239cc0SJ. Bruce Fields goto out; 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds 2996e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2997e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2998e27f49c3SBenny Halevy { 2999e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3000e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3001e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3002e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3003e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3004e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3005e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3006e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3007e27f49c3SBenny Halevy } 3008e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3009e27f49c3SBenny Halevy * it already has, therefore we don't return 3010e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3011e27f49c3SBenny Halevy */ 3012e27f49c3SBenny Halevy } 3013e27f49c3SBenny Halevy 30141da177e4SLinus Torvalds /* 30151da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30161da177e4SLinus Torvalds */ 3017b37ad28bSAl Viro __be32 30181da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30191da177e4SLinus Torvalds { 30206668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 302138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30221da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30231da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3024dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3025567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3026b37ad28bSAl Viro __be32 status; 30271da177e4SLinus Torvalds 30281da177e4SLinus Torvalds /* 30291da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30301da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30311da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30321da177e4SLinus Torvalds */ 30331da177e4SLinus Torvalds fp = find_file(ino); 30341da177e4SLinus Torvalds if (fp) { 30351da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30361da177e4SLinus Torvalds goto out; 303738c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3038c44c5eebSNeilBrown if (status) 3039c44c5eebSNeilBrown goto out; 30401da177e4SLinus Torvalds } else { 3041c44c5eebSNeilBrown status = nfserr_bad_stateid; 30428b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3043c44c5eebSNeilBrown goto out; 30443e772463SJ. Bruce Fields status = nfserr_jukebox; 304532513b40SJ. Bruce Fields fp = open->op_file; 304632513b40SJ. Bruce Fields open->op_file = NULL; 304732513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30481da177e4SLinus Torvalds } 30491da177e4SLinus Torvalds 30501da177e4SLinus Torvalds /* 30511da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30521da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30531da177e4SLinus Torvalds */ 30541da177e4SLinus Torvalds if (stp) { 30551da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3056f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30571da177e4SLinus Torvalds if (status) 30581da177e4SLinus Torvalds goto out; 30591da177e4SLinus Torvalds } else { 30604cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3061567d9829SNeilBrown if (status) 30621da177e4SLinus Torvalds goto out; 30634af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30644af82504SJ. Bruce Fields if (status) 30654af82504SJ. Bruce Fields goto out; 30664cdc951bSJ. Bruce Fields stp = open->op_stp; 30674cdc951bSJ. Bruce Fields open->op_stp = NULL; 3068996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30691da177e4SLinus Torvalds } 3070dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3071dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30721da177e4SLinus Torvalds 3073d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3074dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30756668958fSAndy Adamson 3076d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3077d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3078d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3079d24433cdSBenny Halevy goto nodeleg; 3080d24433cdSBenny Halevy } 3081d24433cdSBenny Halevy } 3082d24433cdSBenny Halevy 30831da177e4SLinus Torvalds /* 30841da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30851da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30861da177e4SLinus Torvalds */ 30875ccb0066SStanislav Kinsbursky nfs4_open_delegation(SVC_NET(rqstp), current_fh, open, stp); 3088d24433cdSBenny Halevy nodeleg: 30891da177e4SLinus Torvalds status = nfs_ok; 30901da177e4SLinus Torvalds 30918c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3092dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30931da177e4SLinus Torvalds out: 3094d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3095d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3096e27f49c3SBenny Halevy open->op_deleg_want) 3097e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3098d24433cdSBenny Halevy 309913cd2184SNeilBrown if (fp) 310013cd2184SNeilBrown put_nfs4_file(fp); 310137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 31021255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 31031da177e4SLinus Torvalds /* 31041da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 31051da177e4SLinus Torvalds */ 31061da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3107dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 31086668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31091da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31101da177e4SLinus Torvalds 31111da177e4SLinus Torvalds return status; 31121da177e4SLinus Torvalds } 31131da177e4SLinus Torvalds 3114d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3115d29b20cdSJ. Bruce Fields { 3116d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3117d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3118d29b20cdSJ. Bruce Fields 3119d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3120d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3121d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3122d29b20cdSJ. Bruce Fields if (status) { 3123d29b20cdSJ. Bruce Fields release_openowner(oo); 3124d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3125d29b20cdSJ. Bruce Fields } else 3126d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3127d29b20cdSJ. Bruce Fields } 3128d29b20cdSJ. Bruce Fields } 312932513b40SJ. Bruce Fields if (open->op_file) 313032513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31314cdc951bSJ. Bruce Fields if (open->op_stp) 3132ef79859eSJ. Bruce Fields free_generic_stateid(open->op_stp); 3133d29b20cdSJ. Bruce Fields } 3134d29b20cdSJ. Bruce Fields 3135b37ad28bSAl Viro __be32 3136b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3137b591480bSJ.Bruce Fields clientid_t *clid) 31381da177e4SLinus Torvalds { 31391da177e4SLinus Torvalds struct nfs4_client *clp; 3140b37ad28bSAl Viro __be32 status; 31417f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 31421da177e4SLinus Torvalds 31431da177e4SLinus Torvalds nfs4_lock_state(); 31441da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31451da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31461da177e4SLinus Torvalds status = nfserr_stale_clientid; 31472c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 31481da177e4SLinus Torvalds goto out; 31498daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, cstate->minorversion, nn); 31501da177e4SLinus Torvalds status = nfserr_expired; 31511da177e4SLinus Torvalds if (clp == NULL) { 31521da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31531da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31541da177e4SLinus Torvalds goto out; 31551da177e4SLinus Torvalds } 31561da177e4SLinus Torvalds status = nfserr_cb_path_down; 3157ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 315877a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31591da177e4SLinus Torvalds goto out; 31601da177e4SLinus Torvalds status = nfs_ok; 31611da177e4SLinus Torvalds out: 31621da177e4SLinus Torvalds nfs4_unlock_state(); 31631da177e4SLinus Torvalds return status; 31641da177e4SLinus Torvalds } 31651da177e4SLinus Torvalds 3166a76b4319SNeilBrown static void 316712760c66SStanislav Kinsbursky nfsd4_end_grace(struct nfsd_net *nn) 3168a76b4319SNeilBrown { 316933dcc481SJeff Layton /* do nothing if grace period already ended */ 3170a51c84edSStanislav Kinsbursky if (nn->grace_ended) 317133dcc481SJeff Layton return; 317233dcc481SJeff Layton 3173a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3174a51c84edSStanislav Kinsbursky nn->grace_ended = true; 317512760c66SStanislav Kinsbursky nfsd4_record_grace_done(nn, nn->boot_time); 31765e1533c7SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 3177e46b498cSJ. Bruce Fields /* 3178e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3179e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3180e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3181e46b498cSJ. Bruce Fields */ 31825284b44eSStanislav Kinsbursky nn->nfsd4_grace = nn->nfsd4_lease; 3183a76b4319SNeilBrown } 3184a76b4319SNeilBrown 3185fd39ca9aSNeilBrown static time_t 318609121281SStanislav Kinsbursky nfs4_laundromat(struct nfsd_net *nn) 31871da177e4SLinus Torvalds { 31881da177e4SLinus Torvalds struct nfs4_client *clp; 3189fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31901da177e4SLinus Torvalds struct nfs4_delegation *dp; 31911da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 31923d733711SStanislav Kinsbursky time_t cutoff = get_seconds() - nn->nfsd4_lease; 31933d733711SStanislav Kinsbursky time_t t, clientid_val = nn->nfsd4_lease; 31943d733711SStanislav Kinsbursky time_t u, test_val = nn->nfsd4_lease; 31951da177e4SLinus Torvalds 31961da177e4SLinus Torvalds nfs4_lock_state(); 31971da177e4SLinus Torvalds 31981da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 319912760c66SStanislav Kinsbursky nfsd4_end_grace(nn); 320036acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 3201c9a49628SStanislav Kinsbursky spin_lock(&nn->client_lock); 32025ed58bb2SStanislav Kinsbursky list_for_each_safe(pos, next, &nn->client_lru) { 32031da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 32041da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 32051da177e4SLinus Torvalds t = clp->cl_time - cutoff; 32061da177e4SLinus Torvalds if (clientid_val > t) 32071da177e4SLinus Torvalds clientid_val = t; 32081da177e4SLinus Torvalds break; 32091da177e4SLinus Torvalds } 3210d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3211d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3212d7682988SBenny Halevy clp->cl_clientid.cl_id); 3213d7682988SBenny Halevy continue; 3214d7682988SBenny Halevy } 3215d7682988SBenny Halevy unhash_client_locked(clp); 3216d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 321736acb66bSBenny Halevy } 3218c9a49628SStanislav Kinsbursky spin_unlock(&nn->client_lock); 321936acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 322036acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32211da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32221da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32231da177e4SLinus Torvalds expire_client(clp); 32241da177e4SLinus Torvalds } 32251da177e4SLinus Torvalds spin_lock(&recall_lock); 32261da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32271da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32284e37a7c2SStanislav Kinsbursky if (net_generic(dp->dl_stid.sc_client->net, nfsd_net_id) != nn) 32294e37a7c2SStanislav Kinsbursky continue; 32301da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32311da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32321da177e4SLinus Torvalds if (test_val > u) 32331da177e4SLinus Torvalds test_val = u; 32341da177e4SLinus Torvalds break; 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32371da177e4SLinus Torvalds } 32381da177e4SLinus Torvalds spin_unlock(&recall_lock); 32391da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32401da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32411da177e4SLinus Torvalds unhash_delegation(dp); 32421da177e4SLinus Torvalds } 32433d733711SStanislav Kinsbursky test_val = nn->nfsd4_lease; 324473758fedSStanislav Kinsbursky list_for_each_safe(pos, next, &nn->close_lru) { 3245fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3246fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3247fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32481da177e4SLinus Torvalds if (test_val > u) 32491da177e4SLinus Torvalds test_val = u; 32501da177e4SLinus Torvalds break; 32511da177e4SLinus Torvalds } 3252fe0750e5SJ. Bruce Fields release_openowner(oo); 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32551da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32561da177e4SLinus Torvalds nfs4_unlock_state(); 32571da177e4SLinus Torvalds return clientid_val; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 3260a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3261a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3262a254b246SHarvey Harrison 3263a254b246SHarvey Harrison static void 326409121281SStanislav Kinsbursky laundromat_main(struct work_struct *laundry) 32651da177e4SLinus Torvalds { 32661da177e4SLinus Torvalds time_t t; 326709121281SStanislav Kinsbursky struct delayed_work *dwork = container_of(laundry, struct delayed_work, 326809121281SStanislav Kinsbursky work); 326909121281SStanislav Kinsbursky struct nfsd_net *nn = container_of(dwork, struct nfsd_net, 327009121281SStanislav Kinsbursky laundromat_work); 32711da177e4SLinus Torvalds 327209121281SStanislav Kinsbursky t = nfs4_laundromat(nn); 32731da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 327409121281SStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, t*HZ); 32751da177e4SLinus Torvalds } 32761da177e4SLinus Torvalds 3277f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3278f8816512SNeilBrown { 3279f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3280f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3281f7a4d872SJ. Bruce Fields return nfs_ok; 32821da177e4SLinus Torvalds } 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds static int 32852c142baaSStanislav Kinsbursky STALE_STATEID(stateid_t *stateid, struct nfsd_net *nn) 32861da177e4SLinus Torvalds { 32872c142baaSStanislav Kinsbursky if (stateid->si_opaque.so_clid.cl_boot == nn->boot_time) 3288e4e83ea4SJ. Bruce Fields return 0; 32898c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32908c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32911da177e4SLinus Torvalds return 1; 32921da177e4SLinus Torvalds } 32931da177e4SLinus Torvalds 32941da177e4SLinus Torvalds static inline int 329582c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32961da177e4SLinus Torvalds { 329782c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 329882c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 329982c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds 33021da177e4SLinus Torvalds static inline int 330382c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 33041da177e4SLinus Torvalds { 330582c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 330682c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds 33091da177e4SLinus Torvalds static 3310dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 33111da177e4SLinus Torvalds { 3312b37ad28bSAl Viro __be32 status = nfserr_openmode; 33131da177e4SLinus Torvalds 331402921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 331502921914SJ. Bruce Fields if (stp->st_openstp) 331602921914SJ. Bruce Fields stp = stp->st_openstp; 331782c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33181da177e4SLinus Torvalds goto out; 331982c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33201da177e4SLinus Torvalds goto out; 33211da177e4SLinus Torvalds status = nfs_ok; 33221da177e4SLinus Torvalds out: 33231da177e4SLinus Torvalds return status; 33241da177e4SLinus Torvalds } 33251da177e4SLinus Torvalds 3326b37ad28bSAl Viro static inline __be32 33275ccb0066SStanislav Kinsbursky check_special_stateids(struct net *net, svc_fh *current_fh, stateid_t *stateid, int flags) 33281da177e4SLinus Torvalds { 3329203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33301da177e4SLinus Torvalds return nfs_ok; 33315ccb0066SStanislav Kinsbursky else if (locks_in_grace(net)) { 333225985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33331da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33341da177e4SLinus Torvalds return nfserr_grace; 33351da177e4SLinus Torvalds } else if (flags & WR_STATE) 33361da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33371da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33381da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33391da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33401da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33411da177e4SLinus Torvalds } 33421da177e4SLinus Torvalds 33431da177e4SLinus Torvalds /* 33441da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33451da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33461da177e4SLinus Torvalds */ 33471da177e4SLinus Torvalds static inline int 33485ccb0066SStanislav Kinsbursky grace_disallows_io(struct net *net, struct inode *inode) 33491da177e4SLinus Torvalds { 33505ccb0066SStanislav Kinsbursky return locks_in_grace(net) && mandatory_lock(inode); 33511da177e4SLinus Torvalds } 33521da177e4SLinus Torvalds 335381b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 335481b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 335581b82965SJ. Bruce Fields { 335681b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 335781b82965SJ. Bruce Fields } 335881b82965SJ. Bruce Fields 335957b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33600836f587SJ. Bruce Fields { 33616668958fSAndy Adamson /* 33626668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33636668958fSAndy Adamson * when it is zero. 33646668958fSAndy Adamson */ 336528dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 336681b82965SJ. Bruce Fields return nfs_ok; 336781b82965SJ. Bruce Fields 336881b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 336981b82965SJ. Bruce Fields return nfs_ok; 33706668958fSAndy Adamson 33710836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 337281b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33730836f587SJ. Bruce Fields return nfserr_bad_stateid; 33740836f587SJ. Bruce Fields /* 337581b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 337681b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 337781b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 337881b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 337981b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 338081b82965SJ. Bruce Fields * but better performance may result in retrying IO that 338181b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 338281b82965SJ. Bruce Fields * reordered in flight: 33830836f587SJ. Bruce Fields */ 33840836f587SJ. Bruce Fields return nfserr_old_stateid; 33850836f587SJ. Bruce Fields } 33860836f587SJ. Bruce Fields 33877df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 338817456804SBryan Schumaker { 338997b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 339097b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 339197b7e3b6SJ. Bruce Fields __be32 status; 339217456804SBryan Schumaker 33937df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33947df302f7SChuck Lever return nfserr_bad_stateid; 33957df302f7SChuck Lever /* Client debugging aid. */ 33967df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33977df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33987df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33997df302f7SChuck Lever sizeof(addr_str)); 34007df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 34017df302f7SChuck Lever "with incorrect client ID\n", addr_str); 34027df302f7SChuck Lever return nfserr_bad_stateid; 34037df302f7SChuck Lever } 340438c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 340597b7e3b6SJ. Bruce Fields if (!s) 34067df302f7SChuck Lever return nfserr_bad_stateid; 340736279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 340817456804SBryan Schumaker if (status) 340917456804SBryan Schumaker return status; 341097b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 341197b7e3b6SJ. Bruce Fields return nfs_ok; 341297b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 341397b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3414dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 341597b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 341697b7e3b6SJ. Bruce Fields return nfs_ok; 341717456804SBryan Schumaker } 341817456804SBryan Schumaker 34193320fef1SStanislav Kinsbursky static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, 34203320fef1SStanislav Kinsbursky struct nfs4_stid **s, bool sessions, 34213320fef1SStanislav Kinsbursky struct nfsd_net *nn) 342238c2f4b1SJ. Bruce Fields { 342338c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 342438c2f4b1SJ. Bruce Fields 342538c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 342638c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 34272c142baaSStanislav Kinsbursky if (STALE_STATEID(stateid, nn)) 342838c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 34298daae4dcSStanislav Kinsbursky cl = find_confirmed_client(&stateid->si_opaque.so_clid, sessions, nn); 343038c2f4b1SJ. Bruce Fields if (!cl) 343138c2f4b1SJ. Bruce Fields return nfserr_expired; 343238c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 343338c2f4b1SJ. Bruce Fields if (!*s) 343438c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 343538c2f4b1SJ. Bruce Fields return nfs_ok; 343638c2f4b1SJ. Bruce Fields 343738c2f4b1SJ. Bruce Fields } 343838c2f4b1SJ. Bruce Fields 34391da177e4SLinus Torvalds /* 34401da177e4SLinus Torvalds * Checks for stateid operations 34411da177e4SLinus Torvalds */ 3442b37ad28bSAl Viro __be32 34435ccb0066SStanislav Kinsbursky nfs4_preprocess_stateid_op(struct net *net, struct nfsd4_compound_state *cstate, 3444dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34451da177e4SLinus Torvalds { 344669064a27SJ. Bruce Fields struct nfs4_stid *s; 3447dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34481da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3449dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34501da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 34513320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 3452b37ad28bSAl Viro __be32 status; 34531da177e4SLinus Torvalds 34541da177e4SLinus Torvalds if (filpp) 34551da177e4SLinus Torvalds *filpp = NULL; 34561da177e4SLinus Torvalds 34575ccb0066SStanislav Kinsbursky if (grace_disallows_io(net, ino)) 34581da177e4SLinus Torvalds return nfserr_grace; 34591da177e4SLinus Torvalds 34601da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34615ccb0066SStanislav Kinsbursky return check_special_stateids(net, current_fh, stateid, flags); 34621da177e4SLinus Torvalds 34633320fef1SStanislav Kinsbursky status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, 34643320fef1SStanislav Kinsbursky &s, cstate->minorversion, nn); 346538c2f4b1SJ. Bruce Fields if (status) 346638c2f4b1SJ. Bruce Fields return status; 346769064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34680c2a498fSJ. Bruce Fields if (status) 34690c2a498fSJ. Bruce Fields goto out; 3470f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3471f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 347269064a27SJ. Bruce Fields dp = delegstateid(s); 3473dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3474dc9bf700SJ. Bruce Fields if (status) 3475dc9bf700SJ. Bruce Fields goto out; 347643b0178eSDan Carpenter if (filpp) { 3477acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3478063b0fb9SJ. Bruce Fields if (!*filpp) { 3479063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 3480063b0fb9SJ. Bruce Fields status = nfserr_serverfault; 3481063b0fb9SJ. Bruce Fields goto out; 3482063b0fb9SJ. Bruce Fields } 348343b0178eSDan Carpenter } 3484f7a4d872SJ. Bruce Fields break; 3485f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3486f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 348769064a27SJ. Bruce Fields stp = openlockstateid(s); 3488f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3489f7a4d872SJ. Bruce Fields if (status) 34901da177e4SLinus Torvalds goto out; 3491fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3492dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34931da177e4SLinus Torvalds goto out; 3494a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3495a4455be0SJ. Bruce Fields if (status) 34961da177e4SLinus Torvalds goto out; 3497f9d7562fSJ. Bruce Fields if (filpp) { 3498f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3499f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3500f9d7562fSJ. Bruce Fields else 3501f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3502f9d7562fSJ. Bruce Fields } 3503f7a4d872SJ. Bruce Fields break; 3504f7a4d872SJ. Bruce Fields default: 3505f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 35061da177e4SLinus Torvalds } 35071da177e4SLinus Torvalds status = nfs_ok; 35081da177e4SLinus Torvalds out: 35091da177e4SLinus Torvalds return status; 35101da177e4SLinus Torvalds } 35111da177e4SLinus Torvalds 3512e1ca12dfSBryan Schumaker static __be32 3513dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3514e1ca12dfSBryan Schumaker { 3515fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3516e1ca12dfSBryan Schumaker return nfserr_locks_held; 3517e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3518e1ca12dfSBryan Schumaker return nfs_ok; 3519e1ca12dfSBryan Schumaker } 3520e1ca12dfSBryan Schumaker 3521e1ca12dfSBryan Schumaker /* 352217456804SBryan Schumaker * Test if the stateid is valid 352317456804SBryan Schumaker */ 352417456804SBryan Schumaker __be32 352517456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 352617456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 352717456804SBryan Schumaker { 352803cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 352903cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 353003cfb420SBryan Schumaker 353103cfb420SBryan Schumaker nfs4_lock_state(); 353203cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 35337df302f7SChuck Lever stateid->ts_id_status = 35347df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 353503cfb420SBryan Schumaker nfs4_unlock_state(); 353603cfb420SBryan Schumaker 353717456804SBryan Schumaker return nfs_ok; 353817456804SBryan Schumaker } 353917456804SBryan Schumaker 3540e1ca12dfSBryan Schumaker __be32 3541e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3542e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3543e1ca12dfSBryan Schumaker { 3544e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35452da1cec7SJ. Bruce Fields struct nfs4_stid *s; 354638c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35472da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3548e1ca12dfSBryan Schumaker 3549e1ca12dfSBryan Schumaker nfs4_lock_state(); 355038c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35512da1cec7SJ. Bruce Fields if (!s) 3552e1ca12dfSBryan Schumaker goto out; 35532da1cec7SJ. Bruce Fields switch (s->sc_type) { 35542da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3555e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3556e1ca12dfSBryan Schumaker goto out; 35572da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35582da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35592da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35602da1cec7SJ. Bruce Fields if (ret) 3561e1ca12dfSBryan Schumaker goto out; 35622da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35632da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35642da1cec7SJ. Bruce Fields else 35652da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3566f7a4d872SJ. Bruce Fields break; 3567f7a4d872SJ. Bruce Fields default: 3568f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3569e1ca12dfSBryan Schumaker } 3570e1ca12dfSBryan Schumaker out: 3571e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3572e1ca12dfSBryan Schumaker return ret; 3573e1ca12dfSBryan Schumaker } 3574e1ca12dfSBryan Schumaker 35754c4cd222SNeilBrown static inline int 35764c4cd222SNeilBrown setlkflg (int type) 35774c4cd222SNeilBrown { 35784c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35794c4cd222SNeilBrown RD_STATE : WR_STATE; 35804c4cd222SNeilBrown } 35811da177e4SLinus Torvalds 3582dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3583c0a5d93eSJ. Bruce Fields { 3584c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3585c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3586c0a5d93eSJ. Bruce Fields __be32 status; 3587c0a5d93eSJ. Bruce Fields 3588c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3589c0a5d93eSJ. Bruce Fields if (status) 3590c0a5d93eSJ. Bruce Fields return status; 3591f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3592f7a4d872SJ. Bruce Fields /* 3593f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3594f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3595f7a4d872SJ. Bruce Fields */ 3596f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3597f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3598f7a4d872SJ. Bruce Fields if (status) 3599f7a4d872SJ. Bruce Fields return status; 3600f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3601c0a5d93eSJ. Bruce Fields } 3602c0a5d93eSJ. Bruce Fields 36031da177e4SLinus Torvalds /* 36041da177e4SLinus Torvalds * Checks for sequence id mutating operations. 36051da177e4SLinus Torvalds */ 3606b37ad28bSAl Viro static __be32 3607dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 36082288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 36093320fef1SStanislav Kinsbursky struct nfs4_ol_stateid **stpp, 36103320fef1SStanislav Kinsbursky struct nfsd_net *nn) 36111da177e4SLinus Torvalds { 36120836f587SJ. Bruce Fields __be32 status; 361338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 36141da177e4SLinus Torvalds 36158c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 36168c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 36171da177e4SLinus Torvalds 36181da177e4SLinus Torvalds *stpp = NULL; 36193320fef1SStanislav Kinsbursky status = nfsd4_lookup_stateid(stateid, typemask, &s, 36203320fef1SStanislav Kinsbursky cstate->minorversion, nn); 3621c0a5d93eSJ. Bruce Fields if (status) 3622c0a5d93eSJ. Bruce Fields return status; 362338c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3624c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 36251da177e4SLinus Torvalds 3626c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36271da177e4SLinus Torvalds } 36281da177e4SLinus Torvalds 36293320fef1SStanislav Kinsbursky static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 36303320fef1SStanislav Kinsbursky stateid_t *stateid, struct nfs4_ol_stateid **stpp, struct nfsd_net *nn) 3631c0a5d93eSJ. Bruce Fields { 3632c0a5d93eSJ. Bruce Fields __be32 status; 3633c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36341da177e4SLinus Torvalds 3635c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36363320fef1SStanislav Kinsbursky NFS4_OPEN_STID, stpp, nn); 36370836f587SJ. Bruce Fields if (status) 36380836f587SJ. Bruce Fields return status; 3639c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3640dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3641c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36423a4f98bbSNeilBrown return nfs_ok; 36431da177e4SLinus Torvalds } 36441da177e4SLinus Torvalds 3645b37ad28bSAl Viro __be32 3646ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3647a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36481da177e4SLinus Torvalds { 3649b37ad28bSAl Viro __be32 status; 3650fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3651dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36523320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3655ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3656ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36571da177e4SLinus Torvalds 3658ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3659a8cddc5dSJ. Bruce Fields if (status) 3660a8cddc5dSJ. Bruce Fields return status; 36611da177e4SLinus Torvalds 36621da177e4SLinus Torvalds nfs4_lock_state(); 36631da177e4SLinus Torvalds 36649072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3665ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36663320fef1SStanislav Kinsbursky NFS4_OPEN_STID, &stp, nn); 36679072d5c6SJ. Bruce Fields if (status) 36681da177e4SLinus Torvalds goto out; 3669fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 367068b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3671dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 367268b66e82SJ. Bruce Fields goto out; 3673dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3674dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3675dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36768c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3677dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3678c7b9a459SNeilBrown 36792a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 368068b66e82SJ. Bruce Fields status = nfs_ok; 36811da177e4SLinus Torvalds out: 36825ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36831da177e4SLinus Torvalds nfs4_unlock_state(); 36841da177e4SLinus Torvalds return status; 36851da177e4SLinus Torvalds } 36861da177e4SLinus Torvalds 36876409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36881da177e4SLinus Torvalds { 368982c5ff1bSJeff Layton if (!test_access(access, stp)) 36906409a5a6SJ. Bruce Fields return; 36916409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 369282c5ff1bSJeff Layton clear_access(access, stp); 3693f197c271SJ. Bruce Fields } 36946409a5a6SJ. Bruce Fields 36956409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36966409a5a6SJ. Bruce Fields { 36976409a5a6SJ. Bruce Fields switch (to_access) { 36986409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36996409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 37006409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 37016409a5a6SJ. Bruce Fields break; 37026409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 37036409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 37046409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 37056409a5a6SJ. Bruce Fields break; 37066409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 37076409a5a6SJ. Bruce Fields break; 37086409a5a6SJ. Bruce Fields default: 3709063b0fb9SJ. Bruce Fields WARN_ON_ONCE(1); 37101da177e4SLinus Torvalds } 37111da177e4SLinus Torvalds } 37121da177e4SLinus Torvalds 37131da177e4SLinus Torvalds static void 3714ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 37151da177e4SLinus Torvalds { 37161da177e4SLinus Torvalds int i; 37171da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 37181da177e4SLinus Torvalds if ((i & deny) != i) 3719ce0fc43cSJeff Layton clear_deny(i, stp); 37201da177e4SLinus Torvalds } 37211da177e4SLinus Torvalds } 37221da177e4SLinus Torvalds 3723b37ad28bSAl Viro __be32 3724ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3725ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3726a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 37271da177e4SLinus Torvalds { 3728b37ad28bSAl Viro __be32 status; 3729dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37303320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 37311da177e4SLinus Torvalds 37321da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3733ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3734ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37351da177e4SLinus Torvalds 3736c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37372c8bd7e0SBenny Halevy if (od->od_deleg_want) 37382c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37392c8bd7e0SBenny Halevy od->od_deleg_want); 37401da177e4SLinus Torvalds 37411da177e4SLinus Torvalds nfs4_lock_state(); 3742c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 37433320fef1SStanislav Kinsbursky &od->od_stateid, &stp, nn); 37449072d5c6SJ. Bruce Fields if (status) 37451da177e4SLinus Torvalds goto out; 37461da177e4SLinus Torvalds status = nfserr_inval; 374782c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37481da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37491da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37501da177e4SLinus Torvalds goto out; 37511da177e4SLinus Torvalds } 3752ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37531da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37541da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37551da177e4SLinus Torvalds goto out; 37561da177e4SLinus Torvalds } 37576409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37581da177e4SLinus Torvalds 3759ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37601da177e4SLinus Torvalds 3761dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3762dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37631da177e4SLinus Torvalds status = nfs_ok; 37641da177e4SLinus Torvalds out: 37655ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37661da177e4SLinus Torvalds nfs4_unlock_state(); 37671da177e4SLinus Torvalds return status; 37681da177e4SLinus Torvalds } 37691da177e4SLinus Torvalds 377038c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 377138c387b5SJ. Bruce Fields { 377238c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 377338c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 377438c387b5SJ. Bruce Fields 377538c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 377638c387b5SJ. Bruce Fields return; 377738c387b5SJ. Bruce Fields oo = openowner(so); 377838c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 377938c387b5SJ. Bruce Fields if (!s) 378038c387b5SJ. Bruce Fields return; 378138c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 378238c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 378338c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 378438c387b5SJ. Bruce Fields return; 378538c387b5SJ. Bruce Fields } 378638c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3787f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3788f7a4d872SJ. Bruce Fields } 3789f7a4d872SJ. Bruce Fields 3790f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3791f7a4d872SJ. Bruce Fields { 3792f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3793f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 379438c387b5SJ. Bruce Fields } 379538c387b5SJ. Bruce Fields 37961da177e4SLinus Torvalds /* 37971da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37981da177e4SLinus Torvalds */ 3799b37ad28bSAl Viro __be32 3800ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3801a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 38021da177e4SLinus Torvalds { 3803b37ad28bSAl Viro __be32 status; 3804fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3805dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 38063320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 38073320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 38081da177e4SLinus Torvalds 38091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3810ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3811ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 38121da177e4SLinus Torvalds 38131da177e4SLinus Torvalds nfs4_lock_state(); 3814f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3815f7a4d872SJ. Bruce Fields &close->cl_stateid, 3816f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 38173320fef1SStanislav Kinsbursky &stp, nn); 38189072d5c6SJ. Bruce Fields if (status) 38191da177e4SLinus Torvalds goto out; 3820fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 38211da177e4SLinus Torvalds status = nfs_ok; 3822dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3823dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 38241da177e4SLinus Torvalds 3825f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 3826cf9182e9SJ. Bruce Fields release_last_closed_stateid(oo); 382738c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 382804ef5954SJ. Bruce Fields 382974dbafafSJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) { 383074dbafafSJ. Bruce Fields if (cstate->minorversion) { 383174dbafafSJ. Bruce Fields release_openowner(oo); 383274dbafafSJ. Bruce Fields cstate->replay_owner = NULL; 383374dbafafSJ. Bruce Fields } else { 383474dbafafSJ. Bruce Fields /* 383574dbafafSJ. Bruce Fields * In the 4.0 case we need to keep the owners around a 383674dbafafSJ. Bruce Fields * little while to handle CLOSE replay. 383704ef5954SJ. Bruce Fields */ 3838fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 383973758fedSStanislav Kinsbursky move_to_close_lru(oo, SVC_NET(rqstp)); 384074dbafafSJ. Bruce Fields } 384174dbafafSJ. Bruce Fields } 38421da177e4SLinus Torvalds out: 38435ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38441da177e4SLinus Torvalds nfs4_unlock_state(); 38451da177e4SLinus Torvalds return status; 38461da177e4SLinus Torvalds } 38471da177e4SLinus Torvalds 3848b37ad28bSAl Viro __be32 3849ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3850ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38511da177e4SLinus Torvalds { 3852203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3853203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 385438c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3855b37ad28bSAl Viro __be32 status; 38563320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 38571da177e4SLinus Torvalds 3858ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3859203a8c8eSJ. Bruce Fields return status; 38601da177e4SLinus Torvalds 38611da177e4SLinus Torvalds nfs4_lock_state(); 38623320fef1SStanislav Kinsbursky status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s, 38633320fef1SStanislav Kinsbursky cstate->minorversion, nn); 386438c2f4b1SJ. Bruce Fields if (status) 3865203a8c8eSJ. Bruce Fields goto out; 386638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3867d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3868203a8c8eSJ. Bruce Fields if (status) 3869203a8c8eSJ. Bruce Fields goto out; 3870203a8c8eSJ. Bruce Fields 3871203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38721da177e4SLinus Torvalds out: 3873203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3874203a8c8eSJ. Bruce Fields 38751da177e4SLinus Torvalds return status; 38761da177e4SLinus Torvalds } 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds 38791da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38801da177e4SLinus Torvalds 3881009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38821da177e4SLinus Torvalds 388387df4de8SBenny Halevy static inline u64 388487df4de8SBenny Halevy end_offset(u64 start, u64 len) 388587df4de8SBenny Halevy { 388687df4de8SBenny Halevy u64 end; 388787df4de8SBenny Halevy 388887df4de8SBenny Halevy end = start + len; 388987df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 389087df4de8SBenny Halevy } 389187df4de8SBenny Halevy 389287df4de8SBenny Halevy /* last octet in a range */ 389387df4de8SBenny Halevy static inline u64 389487df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 389587df4de8SBenny Halevy { 389687df4de8SBenny Halevy u64 end; 389787df4de8SBenny Halevy 3898063b0fb9SJ. Bruce Fields WARN_ON_ONCE(!len); 389987df4de8SBenny Halevy end = start + len; 390087df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 390187df4de8SBenny Halevy } 390287df4de8SBenny Halevy 3903009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 39041da177e4SLinus Torvalds { 39051da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 39061da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3907009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 39081da177e4SLinus Torvalds } 39091da177e4SLinus Torvalds 39101da177e4SLinus Torvalds /* 39111da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 39121da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 39131da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 39141da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 39151da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 39161da177e4SLinus Torvalds * the VFS, but this is a very deep change! 39171da177e4SLinus Torvalds */ 39181da177e4SLinus Torvalds static inline void 39191da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 39201da177e4SLinus Torvalds { 39211da177e4SLinus Torvalds if (lock->fl_start < 0) 39221da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 39231da177e4SLinus Torvalds if (lock->fl_end < 0) 39241da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 39251da177e4SLinus Torvalds } 39261da177e4SLinus Torvalds 3927d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3928d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 39297b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3930d5b9026aSNeilBrown }; 39311da177e4SLinus Torvalds 39321da177e4SLinus Torvalds static inline void 39331da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 39341da177e4SLinus Torvalds { 3935fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39361da177e4SLinus Torvalds 3937d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3938fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3939fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3940fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39417c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39427c13f344SJ. Bruce Fields /* We just don't care that much */ 39437c13f344SJ. Bruce Fields goto nevermind; 3944fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3945fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3946d5b9026aSNeilBrown } else { 39477c13f344SJ. Bruce Fields nevermind: 39487c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39497c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3950d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3951d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39521da177e4SLinus Torvalds } 39531da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 395487df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 395587df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39561da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39571da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39581da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39591da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39601da177e4SLinus Torvalds } 39611da177e4SLinus Torvalds 3962b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3963b93d87c1SJ. Bruce Fields { 3964b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3965b93d87c1SJ. Bruce Fields 3966b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3967b93d87c1SJ. Bruce Fields return false; 3968b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3969b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3970b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3971b93d87c1SJ. Bruce Fields } 3972b93d87c1SJ. Bruce Fields 3973fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3974fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 397520e9e2bcSStanislav Kinsbursky struct xdr_netobj *owner, struct nfsd_net *nn) 39761da177e4SLinus Torvalds { 3977009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3978b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39791da177e4SLinus Torvalds 398020e9e2bcSStanislav Kinsbursky list_for_each_entry(lo, &nn->lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3981b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3982b93d87c1SJ. Bruce Fields return lo; 39831da177e4SLinus Torvalds } 39841da177e4SLinus Torvalds return NULL; 39851da177e4SLinus Torvalds } 39861da177e4SLinus Torvalds 3987dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3988ff194bd9SJ. Bruce Fields { 3989009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3990009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3991009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 39929b531137SStanislav Kinsbursky struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id); 3993009673b4SJ. Bruce Fields 39949b531137SStanislav Kinsbursky list_add(&lo->lo_owner.so_strhash, &nn->ownerstr_hashtbl[strhashval]); 399520e9e2bcSStanislav Kinsbursky list_add(&lo->lo_owner_ino_hash, &nn->lockowner_ino_hashtbl[inohash]); 3996fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3997ff194bd9SJ. Bruce Fields } 3998ff194bd9SJ. Bruce Fields 39991da177e4SLinus Torvalds /* 40001da177e4SLinus Torvalds * Alloc a lock owner structure. 40011da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 400225985edcSLucas De Marchi * occurred. 40031da177e4SLinus Torvalds * 400416bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 40051da177e4SLinus Torvalds */ 40061da177e4SLinus Torvalds 4007fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 4008dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 4009fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 40101da177e4SLinus Torvalds 4011fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 4012fe0750e5SJ. Bruce Fields if (!lo) 40131da177e4SLinus Torvalds return NULL; 4014fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 4015fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 4016b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 4017b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 4018fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 4019fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 4020fe0750e5SJ. Bruce Fields return lo; 40211da177e4SLinus Torvalds } 40221da177e4SLinus Torvalds 4023dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 4024dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 40251da177e4SLinus Torvalds { 4026dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4027d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 40281da177e4SLinus Torvalds 4029996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 40305ac049acSNeilBrown if (stp == NULL) 40316136d2b4SJ. Bruce Fields return NULL; 4032996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 40338beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 4034fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4035fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 403613cd2184SNeilBrown get_nfs4_file(fp); 40371da177e4SLinus Torvalds stp->st_file = fp; 40380997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40391da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40404c4cd222SNeilBrown stp->st_openstp = open_stp; 40411da177e4SLinus Torvalds return stp; 40421da177e4SLinus Torvalds } 40431da177e4SLinus Torvalds 4044fd39ca9aSNeilBrown static int 40451da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40461da177e4SLinus Torvalds { 404787df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40481da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40491da177e4SLinus Torvalds } 40501da177e4SLinus Torvalds 4051dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40520997b173SJ. Bruce Fields { 40530997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40540997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40550997b173SJ. Bruce Fields 405682c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40570997b173SJ. Bruce Fields return; 40580997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 405982c5ff1bSJeff Layton set_access(access, lock_stp); 40600997b173SJ. Bruce Fields } 40610997b173SJ. Bruce Fields 40622355c596SJ. 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) 406364a284d0SJ. Bruce Fields { 406464a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 406564a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 406664a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 406764a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 406864a284d0SJ. Bruce Fields unsigned int strhashval; 406920e9e2bcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(cl->net, nfsd_net_id); 407064a284d0SJ. Bruce Fields 407120e9e2bcSStanislav Kinsbursky lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, 407220e9e2bcSStanislav Kinsbursky &lock->v.new.owner, nn); 407364a284d0SJ. Bruce Fields if (lo) { 407464a284d0SJ. Bruce Fields if (!cstate->minorversion) 407564a284d0SJ. Bruce Fields return nfserr_bad_seqid; 407664a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 407764a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 407864a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 407964a284d0SJ. Bruce Fields return nfs_ok; 408064a284d0SJ. Bruce Fields } 408116bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 408264a284d0SJ. Bruce Fields &lock->v.new.owner); 408364a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 408464a284d0SJ. Bruce Fields if (lo == NULL) 408564a284d0SJ. Bruce Fields return nfserr_jukebox; 408664a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 408764a284d0SJ. Bruce Fields if (*lst == NULL) { 408864a284d0SJ. Bruce Fields release_lockowner(lo); 408964a284d0SJ. Bruce Fields return nfserr_jukebox; 409064a284d0SJ. Bruce Fields } 409164a284d0SJ. Bruce Fields *new = true; 409264a284d0SJ. Bruce Fields return nfs_ok; 409364a284d0SJ. Bruce Fields } 409464a284d0SJ. Bruce Fields 40951da177e4SLinus Torvalds /* 40961da177e4SLinus Torvalds * LOCK operation 40971da177e4SLinus Torvalds */ 4098b37ad28bSAl Viro __be32 4099ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4100a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 41011da177e4SLinus Torvalds { 4102fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4103fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4104dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 41057d947842SJ. Bruce Fields struct file *filp = NULL; 410621179d81SJeff Layton struct file_lock *file_lock = NULL; 410721179d81SJeff Layton struct file_lock *conflock = NULL; 4108b37ad28bSAl Viro __be32 status = 0; 410964a284d0SJ. Bruce Fields bool new_state = false; 4110b34f27aaSJ. Bruce Fields int lkflg; 4111b8dd7b9aSAl Viro int err; 41123320fef1SStanislav Kinsbursky struct net *net = SVC_NET(rqstp); 41133320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 41141da177e4SLinus Torvalds 41151da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 41161da177e4SLinus Torvalds (long long) lock->lk_offset, 41171da177e4SLinus Torvalds (long long) lock->lk_length); 41181da177e4SLinus Torvalds 41191da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 41201da177e4SLinus Torvalds return nfserr_inval; 41211da177e4SLinus Torvalds 4122ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 41238837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4124a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4125a6f6ef2fSAndy Adamson return status; 4126a6f6ef2fSAndy Adamson } 4127a6f6ef2fSAndy Adamson 41281da177e4SLinus Torvalds nfs4_lock_state(); 41291da177e4SLinus Torvalds 41301da177e4SLinus Torvalds if (lock->lk_is_new) { 4131dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 41321da177e4SLinus Torvalds 4133684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4134684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4135684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4136684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4137684e5638SJ. Bruce Fields sizeof(clientid_t)); 4138684e5638SJ. Bruce Fields 41391da177e4SLinus Torvalds status = nfserr_stale_clientid; 41402c142baaSStanislav Kinsbursky if (STALE_CLIENTID(&lock->lk_new_clientid, nn)) 41411da177e4SLinus Torvalds goto out; 41421da177e4SLinus Torvalds 41431da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4144c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41451da177e4SLinus Torvalds lock->lk_new_open_seqid, 41461da177e4SLinus Torvalds &lock->lk_new_open_stateid, 41473320fef1SStanislav Kinsbursky &open_stp, nn); 414837515177SNeilBrown if (status) 41491da177e4SLinus Torvalds goto out; 4150fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4151b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4152684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4153b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4154b34f27aaSJ. Bruce Fields goto out; 415564a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 415664a284d0SJ. Bruce Fields &lock_stp, &new_state); 4157e1aaa891SJ. Bruce Fields } else 4158dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41591da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41601da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41613320fef1SStanislav Kinsbursky NFS4_LOCK_STID, &lock_stp, nn); 41621da177e4SLinus Torvalds if (status) 41631da177e4SLinus Torvalds goto out; 4164fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41651da177e4SLinus Torvalds 4166b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4167b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4168b34f27aaSJ. Bruce Fields if (status) 4169b34f27aaSJ. Bruce Fields goto out; 4170b34f27aaSJ. Bruce Fields 41710dd395dcSNeilBrown status = nfserr_grace; 41723320fef1SStanislav Kinsbursky if (locks_in_grace(net) && !lock->lk_reclaim) 41730dd395dcSNeilBrown goto out; 41740dd395dcSNeilBrown status = nfserr_no_grace; 41753320fef1SStanislav Kinsbursky if (!locks_in_grace(net) && lock->lk_reclaim) 41760dd395dcSNeilBrown goto out; 41770dd395dcSNeilBrown 417821179d81SJeff Layton file_lock = locks_alloc_lock(); 417921179d81SJeff Layton if (!file_lock) { 418021179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 418121179d81SJeff Layton status = nfserr_jukebox; 418221179d81SJeff Layton goto out; 418321179d81SJeff Layton } 418421179d81SJeff Layton 418521179d81SJeff Layton locks_init_lock(file_lock); 41861da177e4SLinus Torvalds switch (lock->lk_type) { 41871da177e4SLinus Torvalds case NFS4_READ_LT: 41881da177e4SLinus Torvalds case NFS4_READW_LT: 4189f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41900997b173SJ. Bruce Fields if (filp) 41910997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 419221179d81SJeff Layton file_lock->fl_type = F_RDLCK; 41931da177e4SLinus Torvalds break; 41941da177e4SLinus Torvalds case NFS4_WRITE_LT: 41951da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4196f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41970997b173SJ. Bruce Fields if (filp) 41980997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 419921179d81SJeff Layton file_lock->fl_type = F_WRLCK; 42001da177e4SLinus Torvalds break; 42011da177e4SLinus Torvalds default: 42021da177e4SLinus Torvalds status = nfserr_inval; 42031da177e4SLinus Torvalds goto out; 42041da177e4SLinus Torvalds } 4205f9d7562fSJ. Bruce Fields if (!filp) { 4206f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4207f9d7562fSJ. Bruce Fields goto out; 4208f9d7562fSJ. Bruce Fields } 420921179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lock_sop; 421021179d81SJeff Layton file_lock->fl_pid = current->tgid; 421121179d81SJeff Layton file_lock->fl_file = filp; 421221179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 421321179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 421421179d81SJeff Layton file_lock->fl_start = lock->lk_offset; 421521179d81SJeff Layton file_lock->fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 421621179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 42171da177e4SLinus Torvalds 421821179d81SJeff Layton conflock = locks_alloc_lock(); 421921179d81SJeff Layton if (!conflock) { 422021179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 422121179d81SJeff Layton status = nfserr_jukebox; 422221179d81SJeff Layton goto out; 422321179d81SJeff Layton } 42241da177e4SLinus Torvalds 422521179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, conflock); 4226b8dd7b9aSAl Viro switch (-err) { 42271da177e4SLinus Torvalds case 0: /* success! */ 4228dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4229dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 42301da177e4SLinus Torvalds sizeof(stateid_t)); 4231b8dd7b9aSAl Viro status = 0; 4232eb76b3fdSAndy Adamson break; 4233eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4234eb76b3fdSAndy Adamson status = nfserr_denied; 4235eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 423621179d81SJeff Layton nfs4_set_lock_denied(conflock, &lock->lk_denied); 4237eb76b3fdSAndy Adamson break; 42381da177e4SLinus Torvalds case (EDEADLK): 42391da177e4SLinus Torvalds status = nfserr_deadlock; 4240eb76b3fdSAndy Adamson break; 42411da177e4SLinus Torvalds default: 4242fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42433e772463SJ. Bruce Fields status = nfserrno(err); 4244eb76b3fdSAndy Adamson break; 42451da177e4SLinus Torvalds } 42461da177e4SLinus Torvalds out: 424764a284d0SJ. Bruce Fields if (status && new_state) 4248f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42495ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42501da177e4SLinus Torvalds nfs4_unlock_state(); 425121179d81SJeff Layton if (file_lock) 425221179d81SJeff Layton locks_free_lock(file_lock); 425321179d81SJeff Layton if (conflock) 425421179d81SJeff Layton locks_free_lock(conflock); 42551da177e4SLinus Torvalds return status; 42561da177e4SLinus Torvalds } 42571da177e4SLinus Torvalds 42581da177e4SLinus Torvalds /* 425955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 426055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 426155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 426255ef1274SJ. Bruce Fields * inode operation.) 426355ef1274SJ. Bruce Fields */ 426404da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 426555ef1274SJ. Bruce Fields { 426655ef1274SJ. Bruce Fields struct file *file; 426704da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 426804da6e9dSAl Viro if (!err) { 426904da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 427055ef1274SJ. Bruce Fields nfsd_close(file); 427104da6e9dSAl Viro } 427255ef1274SJ. Bruce Fields return err; 427355ef1274SJ. Bruce Fields } 427455ef1274SJ. Bruce Fields 427555ef1274SJ. Bruce Fields /* 42761da177e4SLinus Torvalds * LOCKT operation 42771da177e4SLinus Torvalds */ 4278b37ad28bSAl Viro __be32 4279ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4280ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42811da177e4SLinus Torvalds { 42821da177e4SLinus Torvalds struct inode *inode; 428321179d81SJeff Layton struct file_lock *file_lock = NULL; 4284fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4285b37ad28bSAl Viro __be32 status; 42867f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 42871da177e4SLinus Torvalds 42885ccb0066SStanislav Kinsbursky if (locks_in_grace(SVC_NET(rqstp))) 42891da177e4SLinus Torvalds return nfserr_grace; 42901da177e4SLinus Torvalds 42911da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42921da177e4SLinus Torvalds return nfserr_inval; 42931da177e4SLinus Torvalds 42941da177e4SLinus Torvalds nfs4_lock_state(); 42951da177e4SLinus Torvalds 42961da177e4SLinus Torvalds status = nfserr_stale_clientid; 42972c142baaSStanislav Kinsbursky if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid, nn)) 42981da177e4SLinus Torvalds goto out; 42991da177e4SLinus Torvalds 430075c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 43011da177e4SLinus Torvalds goto out; 43021da177e4SLinus Torvalds 4303ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 430421179d81SJeff Layton file_lock = locks_alloc_lock(); 430521179d81SJeff Layton if (!file_lock) { 430621179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 430721179d81SJeff Layton status = nfserr_jukebox; 430821179d81SJeff Layton goto out; 430921179d81SJeff Layton } 431021179d81SJeff Layton locks_init_lock(file_lock); 43111da177e4SLinus Torvalds switch (lockt->lt_type) { 43121da177e4SLinus Torvalds case NFS4_READ_LT: 43131da177e4SLinus Torvalds case NFS4_READW_LT: 431421179d81SJeff Layton file_lock->fl_type = F_RDLCK; 43151da177e4SLinus Torvalds break; 43161da177e4SLinus Torvalds case NFS4_WRITE_LT: 43171da177e4SLinus Torvalds case NFS4_WRITEW_LT: 431821179d81SJeff Layton file_lock->fl_type = F_WRLCK; 43191da177e4SLinus Torvalds break; 43201da177e4SLinus Torvalds default: 43212fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 43221da177e4SLinus Torvalds status = nfserr_inval; 43231da177e4SLinus Torvalds goto out; 43241da177e4SLinus Torvalds } 43251da177e4SLinus Torvalds 432620e9e2bcSStanislav Kinsbursky lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner, nn); 4327fe0750e5SJ. Bruce Fields if (lo) 432821179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lo; 432921179d81SJeff Layton file_lock->fl_pid = current->tgid; 433021179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 43311da177e4SLinus Torvalds 433221179d81SJeff Layton file_lock->fl_start = lockt->lt_offset; 433321179d81SJeff Layton file_lock->fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 43341da177e4SLinus Torvalds 433521179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 43361da177e4SLinus Torvalds 433721179d81SJeff Layton status = nfsd_test_lock(rqstp, &cstate->current_fh, file_lock); 433804da6e9dSAl Viro if (status) 4339fd85b817SMarc Eshel goto out; 434004da6e9dSAl Viro 434121179d81SJeff Layton if (file_lock->fl_type != F_UNLCK) { 43421da177e4SLinus Torvalds status = nfserr_denied; 434321179d81SJeff Layton nfs4_set_lock_denied(file_lock, &lockt->lt_denied); 43441da177e4SLinus Torvalds } 43451da177e4SLinus Torvalds out: 43461da177e4SLinus Torvalds nfs4_unlock_state(); 434721179d81SJeff Layton if (file_lock) 434821179d81SJeff Layton locks_free_lock(file_lock); 43491da177e4SLinus Torvalds return status; 43501da177e4SLinus Torvalds } 43511da177e4SLinus Torvalds 4352b37ad28bSAl Viro __be32 4353ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4354a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43551da177e4SLinus Torvalds { 4356dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43571da177e4SLinus Torvalds struct file *filp = NULL; 435821179d81SJeff Layton struct file_lock *file_lock = NULL; 4359b37ad28bSAl Viro __be32 status; 4360b8dd7b9aSAl Viro int err; 43613320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 43621da177e4SLinus Torvalds 43631da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43641da177e4SLinus Torvalds (long long) locku->lu_offset, 43651da177e4SLinus Torvalds (long long) locku->lu_length); 43661da177e4SLinus Torvalds 43671da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43681da177e4SLinus Torvalds return nfserr_inval; 43691da177e4SLinus Torvalds 43701da177e4SLinus Torvalds nfs4_lock_state(); 43711da177e4SLinus Torvalds 43729072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43733320fef1SStanislav Kinsbursky &locku->lu_stateid, NFS4_LOCK_STID, 43743320fef1SStanislav Kinsbursky &stp, nn); 43759072d5c6SJ. Bruce Fields if (status) 43761da177e4SLinus Torvalds goto out; 4377f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4378f9d7562fSJ. Bruce Fields if (!filp) { 4379f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4380f9d7562fSJ. Bruce Fields goto out; 4381f9d7562fSJ. Bruce Fields } 438221179d81SJeff Layton file_lock = locks_alloc_lock(); 438321179d81SJeff Layton if (!file_lock) { 438421179d81SJeff Layton dprintk("NFSD: %s: unable to allocate lock!\n", __func__); 438521179d81SJeff Layton status = nfserr_jukebox; 438621179d81SJeff Layton goto out; 438721179d81SJeff Layton } 438821179d81SJeff Layton locks_init_lock(file_lock); 438921179d81SJeff Layton file_lock->fl_type = F_UNLCK; 439021179d81SJeff Layton file_lock->fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 439121179d81SJeff Layton file_lock->fl_pid = current->tgid; 439221179d81SJeff Layton file_lock->fl_file = filp; 439321179d81SJeff Layton file_lock->fl_flags = FL_POSIX; 439421179d81SJeff Layton file_lock->fl_lmops = &nfsd_posix_mng_ops; 439521179d81SJeff Layton file_lock->fl_start = locku->lu_offset; 43961da177e4SLinus Torvalds 439721179d81SJeff Layton file_lock->fl_end = last_byte_offset(locku->lu_offset, 439821179d81SJeff Layton locku->lu_length); 439921179d81SJeff Layton nfs4_transform_lock_offset(file_lock); 44001da177e4SLinus Torvalds 44011da177e4SLinus Torvalds /* 44021da177e4SLinus Torvalds * Try to unlock the file in the VFS. 44031da177e4SLinus Torvalds */ 440421179d81SJeff Layton err = vfs_lock_file(filp, F_SETLK, file_lock, NULL); 4405b8dd7b9aSAl Viro if (err) { 4406fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 44071da177e4SLinus Torvalds goto out_nfserr; 44081da177e4SLinus Torvalds } 44091da177e4SLinus Torvalds /* 44101da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 44111da177e4SLinus Torvalds */ 4412dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4413dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 44141da177e4SLinus Torvalds 44151da177e4SLinus Torvalds out: 441671c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 44171da177e4SLinus Torvalds nfs4_unlock_state(); 441821179d81SJeff Layton if (file_lock) 441921179d81SJeff Layton locks_free_lock(file_lock); 44201da177e4SLinus Torvalds return status; 44211da177e4SLinus Torvalds 44221da177e4SLinus Torvalds out_nfserr: 4423b8dd7b9aSAl Viro status = nfserrno(err); 44241da177e4SLinus Torvalds goto out; 44251da177e4SLinus Torvalds } 44261da177e4SLinus Torvalds 44271da177e4SLinus Torvalds /* 44281da177e4SLinus Torvalds * returns 44291da177e4SLinus Torvalds * 1: locks held by lockowner 44301da177e4SLinus Torvalds * 0: no locks held by lockowner 44311da177e4SLinus Torvalds */ 44321da177e4SLinus Torvalds static int 4433fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 44341da177e4SLinus Torvalds { 44351da177e4SLinus Torvalds struct file_lock **flpp; 4436f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 44371da177e4SLinus Torvalds int status = 0; 44381da177e4SLinus Torvalds 4439b89f4321SArnd Bergmann lock_flocks(); 44401da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4441796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 44421da177e4SLinus Torvalds status = 1; 44431da177e4SLinus Torvalds goto out; 44441da177e4SLinus Torvalds } 4445796dadfdSJ. Bruce Fields } 44461da177e4SLinus Torvalds out: 4447b89f4321SArnd Bergmann unlock_flocks(); 44481da177e4SLinus Torvalds return status; 44491da177e4SLinus Torvalds } 44501da177e4SLinus Torvalds 4451b37ad28bSAl Viro __be32 4452b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4453b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4454b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 44551da177e4SLinus Torvalds { 44561da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 44573e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4458fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4459dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44601da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44613e9e3dbeSNeilBrown struct list_head matches; 446216bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4463b37ad28bSAl Viro __be32 status; 44647f2210faSStanislav Kinsbursky struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id); 44651da177e4SLinus Torvalds 44661da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44671da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44681da177e4SLinus Torvalds 44691da177e4SLinus Torvalds /* XXX check for lease expiration */ 44701da177e4SLinus Torvalds 44711da177e4SLinus Torvalds status = nfserr_stale_clientid; 44722c142baaSStanislav Kinsbursky if (STALE_CLIENTID(clid, nn)) 44731da177e4SLinus Torvalds return status; 44741da177e4SLinus Torvalds 44751da177e4SLinus Torvalds nfs4_lock_state(); 44761da177e4SLinus Torvalds 44771da177e4SLinus Torvalds status = nfserr_locks_held; 44783e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 447906f1f864SJ. Bruce Fields 44809b531137SStanislav Kinsbursky list_for_each_entry(sop, &nn->ownerstr_hashtbl[hashval], so_strhash) { 448116bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 448216bfdaafSJ. Bruce Fields continue; 4483599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44843e9e3dbeSNeilBrown continue; 44853e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4486ea1da636SNeilBrown st_perstateowner) { 4487fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4488fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44891da177e4SLinus Torvalds goto out; 4490fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44911da177e4SLinus Torvalds } 44923e9e3dbeSNeilBrown } 44933e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44943e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44953e9e3dbeSNeilBrown * have been checked. */ 44961da177e4SLinus Torvalds status = nfs_ok; 44970fa822e4SNeilBrown while (!list_empty(&matches)) { 4498fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4499fe0750e5SJ. Bruce Fields lo_list); 45000fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 45010fa822e4SNeilBrown * for openowners. */ 4502fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4503fe0750e5SJ. Bruce Fields release_lockowner(lo); 45041da177e4SLinus Torvalds } 45051da177e4SLinus Torvalds out: 45061da177e4SLinus Torvalds nfs4_unlock_state(); 45071da177e4SLinus Torvalds return status; 45081da177e4SLinus Torvalds } 45091da177e4SLinus Torvalds 45101da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4511a55370a3SNeilBrown alloc_reclaim(void) 45121da177e4SLinus Torvalds { 4513a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 45141da177e4SLinus Torvalds } 45151da177e4SLinus Torvalds 45160ce0c2b5SJeff Layton bool 451752e19c09SStanislav Kinsbursky nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn) 4518c7b9a459SNeilBrown { 45190ce0c2b5SJeff Layton struct nfs4_client_reclaim *crp; 4520c7b9a459SNeilBrown 452152e19c09SStanislav Kinsbursky crp = nfsd4_find_reclaim_client(name, nn); 45220ce0c2b5SJeff Layton return (crp && crp->cr_clp); 4523c7b9a459SNeilBrown } 4524c7b9a459SNeilBrown 45251da177e4SLinus Torvalds /* 45261da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 45271da177e4SLinus Torvalds */ 4528772a9bbbSJeff Layton struct nfs4_client_reclaim * 452952e19c09SStanislav Kinsbursky nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn) 45301da177e4SLinus Torvalds { 45311da177e4SLinus Torvalds unsigned int strhashval; 4532772a9bbbSJeff Layton struct nfs4_client_reclaim *crp; 45331da177e4SLinus Torvalds 4534a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4535a55370a3SNeilBrown crp = alloc_reclaim(); 4536772a9bbbSJeff Layton if (crp) { 4537a55370a3SNeilBrown strhashval = clientstr_hashval(name); 45381da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 453952e19c09SStanislav Kinsbursky list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]); 4540a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 45410ce0c2b5SJeff Layton crp->cr_clp = NULL; 454252e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size++; 4543772a9bbbSJeff Layton } 4544772a9bbbSJeff Layton return crp; 45451da177e4SLinus Torvalds } 45461da177e4SLinus Torvalds 45472a4317c5SJeff Layton void 454852e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn) 4549ce30e539SJeff Layton { 4550ce30e539SJeff Layton list_del(&crp->cr_strhash); 4551ce30e539SJeff Layton kfree(crp); 455252e19c09SStanislav Kinsbursky nn->reclaim_str_hashtbl_size--; 4553ce30e539SJeff Layton } 4554ce30e539SJeff Layton 4555ce30e539SJeff Layton void 455652e19c09SStanislav Kinsbursky nfs4_release_reclaim(struct nfsd_net *nn) 45571da177e4SLinus Torvalds { 45581da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45591da177e4SLinus Torvalds int i; 45601da177e4SLinus Torvalds 45611da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 456252e19c09SStanislav Kinsbursky while (!list_empty(&nn->reclaim_str_hashtbl[i])) { 456352e19c09SStanislav Kinsbursky crp = list_entry(nn->reclaim_str_hashtbl[i].next, 45641da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 456552e19c09SStanislav Kinsbursky nfs4_remove_reclaim_record(crp, nn); 45661da177e4SLinus Torvalds } 45671da177e4SLinus Torvalds } 4568063b0fb9SJ. Bruce Fields WARN_ON_ONCE(nn->reclaim_str_hashtbl_size); 45691da177e4SLinus Torvalds } 45701da177e4SLinus Torvalds 45711da177e4SLinus Torvalds /* 45721da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45732a4317c5SJeff Layton struct nfs4_client_reclaim * 457452e19c09SStanislav Kinsbursky nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn) 45751da177e4SLinus Torvalds { 45761da177e4SLinus Torvalds unsigned int strhashval; 45771da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45781da177e4SLinus Torvalds 4579278c931cSJeff Layton dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir); 45801da177e4SLinus Torvalds 4581278c931cSJeff Layton strhashval = clientstr_hashval(recdir); 458252e19c09SStanislav Kinsbursky list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) { 4583278c931cSJeff Layton if (same_name(crp->cr_recdir, recdir)) { 45841da177e4SLinus Torvalds return crp; 45851da177e4SLinus Torvalds } 45861da177e4SLinus Torvalds } 45871da177e4SLinus Torvalds return NULL; 45881da177e4SLinus Torvalds } 45891da177e4SLinus Torvalds 45901da177e4SLinus Torvalds /* 45911da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45921da177e4SLinus Torvalds */ 4593b37ad28bSAl Viro __be32 45943320fef1SStanislav Kinsbursky nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn) 45951da177e4SLinus Torvalds { 4596a52d726bSJeff Layton struct nfs4_client *clp; 4597a52d726bSJeff Layton 4598a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 45998daae4dcSStanislav Kinsbursky clp = find_confirmed_client(clid, sessions, nn); 4600a52d726bSJeff Layton if (clp == NULL) 4601a52d726bSJeff Layton return nfserr_reclaim_bad; 4602a52d726bSJeff Layton 4603a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 46041da177e4SLinus Torvalds } 46051da177e4SLinus Torvalds 460665178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 460765178db4SBryan Schumaker 460844e34da6SBryan Schumaker u64 nfsd_forget_client(struct nfs4_client *clp, u64 max) 460944e34da6SBryan Schumaker { 461044e34da6SBryan Schumaker expire_client(clp); 461144e34da6SBryan Schumaker return 1; 461244e34da6SBryan Schumaker } 461344e34da6SBryan Schumaker 4614fc29171fSBryan Schumaker static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_lockowner *)) 4615fc29171fSBryan Schumaker { 4616fc29171fSBryan Schumaker struct nfs4_openowner *oop; 4617fc29171fSBryan Schumaker struct nfs4_lockowner *lop, *lo_next; 4618fc29171fSBryan Schumaker struct nfs4_ol_stateid *stp, *st_next; 4619fc29171fSBryan Schumaker u64 count = 0; 4620fc29171fSBryan Schumaker 4621fc29171fSBryan Schumaker list_for_each_entry(oop, &clp->cl_openowners, oo_perclient) { 4622fc29171fSBryan Schumaker list_for_each_entry_safe(stp, st_next, &oop->oo_owner.so_stateids, st_perstateowner) { 4623fc29171fSBryan Schumaker list_for_each_entry_safe(lop, lo_next, &stp->st_lockowners, lo_perstateid) { 4624fc29171fSBryan Schumaker if (func) 4625fc29171fSBryan Schumaker func(lop); 4626fc29171fSBryan Schumaker if (++count == max) 4627fc29171fSBryan Schumaker return count; 4628fc29171fSBryan Schumaker } 4629fc29171fSBryan Schumaker } 4630fc29171fSBryan Schumaker } 4631fc29171fSBryan Schumaker 4632fc29171fSBryan Schumaker return count; 4633fc29171fSBryan Schumaker } 4634fc29171fSBryan Schumaker 4635fc29171fSBryan Schumaker u64 nfsd_forget_client_locks(struct nfs4_client *clp, u64 max) 4636fc29171fSBryan Schumaker { 4637fc29171fSBryan Schumaker return nfsd_foreach_client_lock(clp, max, release_lockowner); 4638fc29171fSBryan Schumaker } 4639fc29171fSBryan Schumaker 46404dbdbda8SBryan Schumaker static u64 nfsd_foreach_client_open(struct nfs4_client *clp, u64 max, void (*func)(struct nfs4_openowner *)) 46414dbdbda8SBryan Schumaker { 46424dbdbda8SBryan Schumaker struct nfs4_openowner *oop, *next; 46434dbdbda8SBryan Schumaker u64 count = 0; 46444dbdbda8SBryan Schumaker 46454dbdbda8SBryan Schumaker list_for_each_entry_safe(oop, next, &clp->cl_openowners, oo_perclient) { 46464dbdbda8SBryan Schumaker if (func) 46474dbdbda8SBryan Schumaker func(oop); 46484dbdbda8SBryan Schumaker if (++count == max) 46494dbdbda8SBryan Schumaker break; 46504dbdbda8SBryan Schumaker } 46514dbdbda8SBryan Schumaker 46524dbdbda8SBryan Schumaker return count; 46534dbdbda8SBryan Schumaker } 46544dbdbda8SBryan Schumaker 46554dbdbda8SBryan Schumaker u64 nfsd_forget_client_openowners(struct nfs4_client *clp, u64 max) 46564dbdbda8SBryan Schumaker { 46574dbdbda8SBryan Schumaker return nfsd_foreach_client_open(clp, max, release_openowner); 46584dbdbda8SBryan Schumaker } 46594dbdbda8SBryan Schumaker 466044e34da6SBryan Schumaker u64 nfsd_for_n_state(u64 max, u64 (*func)(struct nfs4_client *, u64)) 466165178db4SBryan Schumaker { 466265178db4SBryan Schumaker struct nfs4_client *clp, *next; 466344e34da6SBryan Schumaker u64 count = 0; 46643320fef1SStanislav Kinsbursky struct nfsd_net *nn = net_generic(current->nsproxy->net_ns, nfsd_net_id); 466565178db4SBryan Schumaker 466644e34da6SBryan Schumaker if (!nfsd_netns_ready(nn)) 466744e34da6SBryan Schumaker return 0; 466844e34da6SBryan Schumaker 46695ed58bb2SStanislav Kinsbursky list_for_each_entry_safe(clp, next, &nn->client_lru, cl_lru) { 467044e34da6SBryan Schumaker count += func(clp, max - count); 467144e34da6SBryan Schumaker if ((max != 0) && (count >= max)) 467265178db4SBryan Schumaker break; 467365178db4SBryan Schumaker } 467465178db4SBryan Schumaker 467544e34da6SBryan Schumaker return count; 467644e34da6SBryan Schumaker } 467744e34da6SBryan Schumaker 467844e34da6SBryan Schumaker void nfsd_forget_clients(u64 num) 467944e34da6SBryan Schumaker { 468044e34da6SBryan Schumaker u64 count = nfsd_for_n_state(num, nfsd_forget_client); 468144e34da6SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %llu clients", count); 468265178db4SBryan Schumaker } 468365178db4SBryan Schumaker 468465178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 468565178db4SBryan Schumaker { 4686fc29171fSBryan Schumaker u64 count = nfsd_for_n_state(num, nfsd_forget_client_locks); 4687fc29171fSBryan Schumaker printk(KERN_INFO "NFSD: Forgot %llu locks", count); 468865178db4SBryan Schumaker } 468965178db4SBryan Schumaker 469065178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 469165178db4SBryan Schumaker { 46924dbdbda8SBryan Schumaker u64 count = nfsd_for_n_state(num, nfsd_forget_client_openowners); 46934dbdbda8SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %llu open owners", count); 469465178db4SBryan Schumaker } 469565178db4SBryan Schumaker 4696da5c80a9SJ. Bruce Fields static int nfsd_process_n_delegations(u64 num, struct list_head *list) 469765178db4SBryan Schumaker { 469865178db4SBryan Schumaker int i, count = 0; 46992d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 47002d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 470165178db4SBryan Schumaker 470265178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 47032d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 47042d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 4705a6d88f29SStanislav Kinsbursky list_move(&dp->dl_recall_lru, list); 470665178db4SBryan Schumaker if (++count == num) 470765178db4SBryan Schumaker return count; 470865178db4SBryan Schumaker } 470965178db4SBryan Schumaker } 471065178db4SBryan Schumaker } 47112d3475c0SBryan Schumaker 471265178db4SBryan Schumaker return count; 471365178db4SBryan Schumaker } 471465178db4SBryan Schumaker 471565178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 471665178db4SBryan Schumaker { 471765178db4SBryan Schumaker unsigned int count; 4718a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4719a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 4720a6d88f29SStanislav Kinsbursky 4721a6d88f29SStanislav Kinsbursky spin_lock(&recall_lock); 4722a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4723a6d88f29SStanislav Kinsbursky spin_unlock(&recall_lock); 472465178db4SBryan Schumaker 4725a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) 4726a6d88f29SStanislav Kinsbursky unhash_delegation(dp); 472765178db4SBryan Schumaker 472865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 472965178db4SBryan Schumaker } 473065178db4SBryan Schumaker 473165178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 473265178db4SBryan Schumaker { 473365178db4SBryan Schumaker unsigned int count; 4734a6d88f29SStanislav Kinsbursky LIST_HEAD(victims); 4735a6d88f29SStanislav Kinsbursky struct nfs4_delegation *dp, *dnext; 473665178db4SBryan Schumaker 473765178db4SBryan Schumaker spin_lock(&recall_lock); 4738a6d88f29SStanislav Kinsbursky count = nfsd_process_n_delegations(num, &victims); 4739a6d88f29SStanislav Kinsbursky list_for_each_entry_safe(dp, dnext, &victims, dl_recall_lru) { 4740a6d88f29SStanislav Kinsbursky list_del(&dp->dl_recall_lru); 4741a6d88f29SStanislav Kinsbursky nfsd_break_one_deleg(dp); 4742a6d88f29SStanislav Kinsbursky } 474365178db4SBryan Schumaker spin_unlock(&recall_lock); 474465178db4SBryan Schumaker 474565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 474665178db4SBryan Schumaker } 474765178db4SBryan Schumaker 474865178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 474965178db4SBryan Schumaker 4750ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 47511da177e4SLinus Torvalds 475272083396SBryan Schumaker void 4753ac4d8ff2SNeilBrown nfs4_state_init(void) 47541da177e4SLinus Torvalds { 475572083396SBryan Schumaker int i; 47561da177e4SLinus Torvalds 47571da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 47581da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 47591da177e4SLinus Torvalds } 47601da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4761ac4d8ff2SNeilBrown } 4762ac4d8ff2SNeilBrown 4763c2f1a551SMeelap Shah /* 4764c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4765c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4766c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4767c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4768c2f1a551SMeelap Shah * 4769c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4770c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4771c2f1a551SMeelap Shah */ 4772c2f1a551SMeelap Shah static void 4773c2f1a551SMeelap Shah set_max_delegations(void) 4774c2f1a551SMeelap Shah { 4775c2f1a551SMeelap Shah /* 4776c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4777c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4778c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4779c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4780c2f1a551SMeelap Shah */ 4781c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4782c2f1a551SMeelap Shah } 4783c2f1a551SMeelap Shah 4784d85ed443SStanislav Kinsbursky static int nfs4_state_create_net(struct net *net) 47858daae4dcSStanislav Kinsbursky { 47868daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 47878daae4dcSStanislav Kinsbursky int i; 47888daae4dcSStanislav Kinsbursky 47898daae4dcSStanislav Kinsbursky nn->conf_id_hashtbl = kmalloc(sizeof(struct list_head) * 47908daae4dcSStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 47918daae4dcSStanislav Kinsbursky if (!nn->conf_id_hashtbl) 4792382a62e7SStanislav Kinsbursky goto err; 47930a7ec377SStanislav Kinsbursky nn->unconf_id_hashtbl = kmalloc(sizeof(struct list_head) * 47940a7ec377SStanislav Kinsbursky CLIENT_HASH_SIZE, GFP_KERNEL); 47950a7ec377SStanislav Kinsbursky if (!nn->unconf_id_hashtbl) 47960a7ec377SStanislav Kinsbursky goto err_unconf_id; 47979b531137SStanislav Kinsbursky nn->ownerstr_hashtbl = kmalloc(sizeof(struct list_head) * 47989b531137SStanislav Kinsbursky OWNER_HASH_SIZE, GFP_KERNEL); 47999b531137SStanislav Kinsbursky if (!nn->ownerstr_hashtbl) 48009b531137SStanislav Kinsbursky goto err_ownerstr; 480120e9e2bcSStanislav Kinsbursky nn->lockowner_ino_hashtbl = kmalloc(sizeof(struct list_head) * 480220e9e2bcSStanislav Kinsbursky LOCKOWNER_INO_HASH_SIZE, GFP_KERNEL); 480320e9e2bcSStanislav Kinsbursky if (!nn->lockowner_ino_hashtbl) 480420e9e2bcSStanislav Kinsbursky goto err_lockowner_ino; 48051872de0eSStanislav Kinsbursky nn->sessionid_hashtbl = kmalloc(sizeof(struct list_head) * 48061872de0eSStanislav Kinsbursky SESSION_HASH_SIZE, GFP_KERNEL); 48071872de0eSStanislav Kinsbursky if (!nn->sessionid_hashtbl) 48081872de0eSStanislav Kinsbursky goto err_sessionid; 48098daae4dcSStanislav Kinsbursky 4810382a62e7SStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 48118daae4dcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->conf_id_hashtbl[i]); 48120a7ec377SStanislav Kinsbursky INIT_LIST_HEAD(&nn->unconf_id_hashtbl[i]); 4813382a62e7SStanislav Kinsbursky } 48149b531137SStanislav Kinsbursky for (i = 0; i < OWNER_HASH_SIZE; i++) 48159b531137SStanislav Kinsbursky INIT_LIST_HEAD(&nn->ownerstr_hashtbl[i]); 481620e9e2bcSStanislav Kinsbursky for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 481720e9e2bcSStanislav Kinsbursky INIT_LIST_HEAD(&nn->lockowner_ino_hashtbl[i]); 48181872de0eSStanislav Kinsbursky for (i = 0; i < SESSION_HASH_SIZE; i++) 48191872de0eSStanislav Kinsbursky INIT_LIST_HEAD(&nn->sessionid_hashtbl[i]); 4820382a62e7SStanislav Kinsbursky nn->conf_name_tree = RB_ROOT; 4821a99454aaSStanislav Kinsbursky nn->unconf_name_tree = RB_ROOT; 48225ed58bb2SStanislav Kinsbursky INIT_LIST_HEAD(&nn->client_lru); 482373758fedSStanislav Kinsbursky INIT_LIST_HEAD(&nn->close_lru); 4824c9a49628SStanislav Kinsbursky spin_lock_init(&nn->client_lock); 48258daae4dcSStanislav Kinsbursky 482609121281SStanislav Kinsbursky INIT_DELAYED_WORK(&nn->laundromat_work, laundromat_main); 4827d85ed443SStanislav Kinsbursky get_net(net); 482809121281SStanislav Kinsbursky 48298daae4dcSStanislav Kinsbursky return 0; 4830382a62e7SStanislav Kinsbursky 48311872de0eSStanislav Kinsbursky err_sessionid: 48321872de0eSStanislav Kinsbursky kfree(nn->lockowner_ino_hashtbl); 483320e9e2bcSStanislav Kinsbursky err_lockowner_ino: 483420e9e2bcSStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 48359b531137SStanislav Kinsbursky err_ownerstr: 48369b531137SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 48370a7ec377SStanislav Kinsbursky err_unconf_id: 48380a7ec377SStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 4839382a62e7SStanislav Kinsbursky err: 4840382a62e7SStanislav Kinsbursky return -ENOMEM; 48418daae4dcSStanislav Kinsbursky } 48428daae4dcSStanislav Kinsbursky 48438daae4dcSStanislav Kinsbursky static void 48444dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(struct net *net) 48458daae4dcSStanislav Kinsbursky { 48468daae4dcSStanislav Kinsbursky int i; 48478daae4dcSStanislav Kinsbursky struct nfs4_client *clp = NULL; 48488daae4dcSStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4849a99454aaSStanislav Kinsbursky struct rb_node *node, *tmp; 48508daae4dcSStanislav Kinsbursky 48518daae4dcSStanislav Kinsbursky for (i = 0; i < CLIENT_HASH_SIZE; i++) { 48528daae4dcSStanislav Kinsbursky while (!list_empty(&nn->conf_id_hashtbl[i])) { 48538daae4dcSStanislav Kinsbursky clp = list_entry(nn->conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 48548daae4dcSStanislav Kinsbursky destroy_client(clp); 48558daae4dcSStanislav Kinsbursky } 48568daae4dcSStanislav Kinsbursky } 4857a99454aaSStanislav Kinsbursky 4858a99454aaSStanislav Kinsbursky node = rb_first(&nn->unconf_name_tree); 4859a99454aaSStanislav Kinsbursky while (node != NULL) { 4860a99454aaSStanislav Kinsbursky tmp = node; 4861a99454aaSStanislav Kinsbursky node = rb_next(tmp); 4862a99454aaSStanislav Kinsbursky clp = rb_entry(tmp, struct nfs4_client, cl_namenode); 4863a99454aaSStanislav Kinsbursky rb_erase(tmp, &nn->unconf_name_tree); 4864a99454aaSStanislav Kinsbursky destroy_client(clp); 4865a99454aaSStanislav Kinsbursky } 4866a99454aaSStanislav Kinsbursky 48671872de0eSStanislav Kinsbursky kfree(nn->sessionid_hashtbl); 486820e9e2bcSStanislav Kinsbursky kfree(nn->lockowner_ino_hashtbl); 48699b531137SStanislav Kinsbursky kfree(nn->ownerstr_hashtbl); 48700a7ec377SStanislav Kinsbursky kfree(nn->unconf_id_hashtbl); 48718daae4dcSStanislav Kinsbursky kfree(nn->conf_id_hashtbl); 48724dce0ac9SStanislav Kinsbursky put_net(net); 48738daae4dcSStanislav Kinsbursky } 48748daae4dcSStanislav Kinsbursky 4875f252bc68SStanislav Kinsbursky int 4876d85ed443SStanislav Kinsbursky nfs4_state_start_net(struct net *net) 4877ac4d8ff2SNeilBrown { 48785e1533c7SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 4879b5a1a81eSJ. Bruce Fields int ret; 4880b5a1a81eSJ. Bruce Fields 4881f252bc68SStanislav Kinsbursky /* 4882f252bc68SStanislav Kinsbursky * FIXME: For now, we hang most of the pernet global stuff off of 4883f252bc68SStanislav Kinsbursky * init_net until nfsd is fully containerized. Eventually, we'll 4884f252bc68SStanislav Kinsbursky * need to pass a net pointer into this function, take a reference 4885f252bc68SStanislav Kinsbursky * to that instead and then do most of the rest of this on a per-net 4886f252bc68SStanislav Kinsbursky * basis. 4887f252bc68SStanislav Kinsbursky */ 4888f252bc68SStanislav Kinsbursky if (net != &init_net) 4889f252bc68SStanislav Kinsbursky return -EINVAL; 4890f252bc68SStanislav Kinsbursky 4891d85ed443SStanislav Kinsbursky ret = nfs4_state_create_net(net); 48928daae4dcSStanislav Kinsbursky if (ret) 48938daae4dcSStanislav Kinsbursky return ret; 48945e1533c7SStanislav Kinsbursky nfsd4_client_tracking_init(net); 48952c142baaSStanislav Kinsbursky nn->boot_time = get_seconds(); 48965ccb0066SStanislav Kinsbursky locks_start_grace(net, &nn->nfsd4_manager); 4897a51c84edSStanislav Kinsbursky nn->grace_ended = false; 4898d85ed443SStanislav Kinsbursky printk(KERN_INFO "NFSD: starting %ld-second grace period (net %p)\n", 48995284b44eSStanislav Kinsbursky nn->nfsd4_grace, net); 49005284b44eSStanislav Kinsbursky queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ); 4901d85ed443SStanislav Kinsbursky return 0; 4902a6d6b781SJeff Layton } 4903d85ed443SStanislav Kinsbursky 4904d85ed443SStanislav Kinsbursky /* initialization to perform when the nfsd service is started: */ 4905d85ed443SStanislav Kinsbursky 4906d85ed443SStanislav Kinsbursky int 4907d85ed443SStanislav Kinsbursky nfs4_state_start(void) 4908d85ed443SStanislav Kinsbursky { 4909d85ed443SStanislav Kinsbursky int ret; 4910d85ed443SStanislav Kinsbursky 4911d85ed443SStanislav Kinsbursky ret = set_callback_cred(); 4912d85ed443SStanislav Kinsbursky if (ret) 4913d85ed443SStanislav Kinsbursky return -ENOMEM; 491458da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4915a6d6b781SJeff Layton if (laundry_wq == NULL) { 4916a6d6b781SJeff Layton ret = -ENOMEM; 4917a6d6b781SJeff Layton goto out_recovery; 4918a6d6b781SJeff Layton } 4919b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4920b5a1a81eSJ. Bruce Fields if (ret) 4921b5a1a81eSJ. Bruce Fields goto out_free_laundry; 492209121281SStanislav Kinsbursky 4923c2f1a551SMeelap Shah set_max_delegations(); 4924d85ed443SStanislav Kinsbursky 4925b5a1a81eSJ. Bruce Fields return 0; 4926d85ed443SStanislav Kinsbursky 4927b5a1a81eSJ. Bruce Fields out_free_laundry: 4928b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4929a6d6b781SJeff Layton out_recovery: 4930b5a1a81eSJ. Bruce Fields return ret; 49311da177e4SLinus Torvalds } 49321da177e4SLinus Torvalds 4933ac55fdc4SJeff Layton /* should be called with the state lock held */ 4934f252bc68SStanislav Kinsbursky void 49354dce0ac9SStanislav Kinsbursky nfs4_state_shutdown_net(struct net *net) 49361da177e4SLinus Torvalds { 49371da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 49381da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 49394dce0ac9SStanislav Kinsbursky struct nfsd_net *nn = net_generic(net, nfsd_net_id); 49401da177e4SLinus Torvalds 49414dce0ac9SStanislav Kinsbursky cancel_delayed_work_sync(&nn->laundromat_work); 49424dce0ac9SStanislav Kinsbursky locks_end_grace(&nn->nfsd4_manager); 4943ac55fdc4SJeff Layton 49441da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 49451da177e4SLinus Torvalds spin_lock(&recall_lock); 49461da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 49471da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 49484e37a7c2SStanislav Kinsbursky if (dp->dl_stid.sc_client->net != net) 49494e37a7c2SStanislav Kinsbursky continue; 49501da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 49511da177e4SLinus Torvalds } 49521da177e4SLinus Torvalds spin_unlock(&recall_lock); 49531da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 49541da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 49551da177e4SLinus Torvalds unhash_delegation(dp); 49561da177e4SLinus Torvalds } 49571da177e4SLinus Torvalds 49583320fef1SStanislav Kinsbursky nfsd4_client_tracking_exit(net); 49594dce0ac9SStanislav Kinsbursky nfs4_state_destroy_net(net); 49601da177e4SLinus Torvalds } 49611da177e4SLinus Torvalds 49621da177e4SLinus Torvalds void 49631da177e4SLinus Torvalds nfs4_state_shutdown(void) 49641da177e4SLinus Torvalds { 49655e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 4966c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 49671da177e4SLinus Torvalds } 49688b70484cSTigran Mkrtchyan 49698b70484cSTigran Mkrtchyan static void 49708b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49718b70484cSTigran Mkrtchyan { 497237c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 497337c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 49748b70484cSTigran Mkrtchyan } 49758b70484cSTigran Mkrtchyan 49768b70484cSTigran Mkrtchyan static void 49778b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 49788b70484cSTigran Mkrtchyan { 497937c593c5STigran Mkrtchyan if (cstate->minorversion) { 498037c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 498137c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 498237c593c5STigran Mkrtchyan } 498337c593c5STigran Mkrtchyan } 498437c593c5STigran Mkrtchyan 498537c593c5STigran Mkrtchyan void 498637c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 498737c593c5STigran Mkrtchyan { 498837c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 49898b70484cSTigran Mkrtchyan } 49908b70484cSTigran Mkrtchyan 499162cd4a59STigran Mkrtchyan /* 499262cd4a59STigran Mkrtchyan * functions to set current state id 499362cd4a59STigran Mkrtchyan */ 49948b70484cSTigran Mkrtchyan void 49959428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 49969428fe1aSTigran Mkrtchyan { 49979428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 49989428fe1aSTigran Mkrtchyan } 49999428fe1aSTigran Mkrtchyan 50009428fe1aSTigran Mkrtchyan void 50018b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 50028b70484cSTigran Mkrtchyan { 50038b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 50048b70484cSTigran Mkrtchyan } 50058b70484cSTigran Mkrtchyan 50068b70484cSTigran Mkrtchyan void 500762cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 500862cd4a59STigran Mkrtchyan { 500962cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 501062cd4a59STigran Mkrtchyan } 501162cd4a59STigran Mkrtchyan 501262cd4a59STigran Mkrtchyan void 501362cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 501462cd4a59STigran Mkrtchyan { 501562cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 501662cd4a59STigran Mkrtchyan } 501762cd4a59STigran Mkrtchyan 501862cd4a59STigran Mkrtchyan /* 501962cd4a59STigran Mkrtchyan * functions to consume current state id 502062cd4a59STigran Mkrtchyan */ 50211e97b519STigran Mkrtchyan 50221e97b519STigran Mkrtchyan void 50239428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 50249428fe1aSTigran Mkrtchyan { 50259428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 50269428fe1aSTigran Mkrtchyan } 50279428fe1aSTigran Mkrtchyan 50289428fe1aSTigran Mkrtchyan void 50299428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 50309428fe1aSTigran Mkrtchyan { 50319428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 50329428fe1aSTigran Mkrtchyan } 50339428fe1aSTigran Mkrtchyan 50349428fe1aSTigran Mkrtchyan void 50351e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 50361e97b519STigran Mkrtchyan { 50371e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 50381e97b519STigran Mkrtchyan } 50391e97b519STigran Mkrtchyan 50401e97b519STigran Mkrtchyan void 50411e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 50421e97b519STigran Mkrtchyan { 50431e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 50441e97b519STigran Mkrtchyan } 50451e97b519STigran Mkrtchyan 504662cd4a59STigran Mkrtchyan void 50478b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 50488b70484cSTigran Mkrtchyan { 50498b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 50508b70484cSTigran Mkrtchyan } 50518b70484cSTigran Mkrtchyan 50528b70484cSTigran Mkrtchyan void 505362cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 50548b70484cSTigran Mkrtchyan { 505562cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 50568b70484cSTigran Mkrtchyan } 505730813e27STigran Mkrtchyan 505830813e27STigran Mkrtchyan void 505930813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 506030813e27STigran Mkrtchyan { 506130813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 506230813e27STigran Mkrtchyan } 506330813e27STigran Mkrtchyan 506430813e27STigran Mkrtchyan void 506530813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 506630813e27STigran Mkrtchyan { 506730813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 506830813e27STigran Mkrtchyan } 5069