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> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 45bfa4b365SJ. Bruce Fields #include "current_stateid.h" 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* Globals */ 50cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 51efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 52fd39ca9aSNeilBrown static time_t boot_time; 53f32f3c2dSJ. Bruce Fields 54f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 55f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 56f32f3c2dSJ. Bruce Fields .si_generation = ~0, 57f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 58f32f3c2dSJ. Bruce Fields }; 59f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 60f32f3c2dSJ. Bruce Fields /* all fields zero */ 61f32f3c2dSJ. Bruce Fields }; 6219ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6319ff0f28STigran Mkrtchyan .si_generation = 1, 6419ff0f28STigran Mkrtchyan }; 65f32f3c2dSJ. Bruce Fields 66ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 67fd39ca9aSNeilBrown 68f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 69f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7019ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* forward declarations */ 73fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 741da177e4SLinus Torvalds 758b671b80SJ. Bruce Fields /* Locking: */ 768b671b80SJ. Bruce Fields 778b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 78353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 791da177e4SLinus Torvalds 808b671b80SJ. Bruce Fields /* 818b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 828b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 838b671b80SJ. Bruce Fields * eventually cover more: 848b671b80SJ. Bruce Fields */ 858b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 868b671b80SJ. Bruce Fields 87fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 88fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 89e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 92e60d4398SNeilBrown 931da177e4SLinus Torvalds void 941da177e4SLinus Torvalds nfs4_lock_state(void) 951da177e4SLinus Torvalds { 96353ab6e9SIngo Molnar mutex_lock(&client_mutex); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 99508dc6e1SBenny Halevy static void free_session(struct kref *); 100508dc6e1SBenny Halevy 101508dc6e1SBenny Halevy /* Must be called under the client_lock */ 102508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 103508dc6e1SBenny Halevy { 104508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 105508dc6e1SBenny Halevy } 106508dc6e1SBenny Halevy 107508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 108508dc6e1SBenny Halevy { 109508dc6e1SBenny Halevy kref_get(&ses->se_ref); 110508dc6e1SBenny Halevy } 111508dc6e1SBenny Halevy 1121da177e4SLinus Torvalds void 1131da177e4SLinus Torvalds nfs4_unlock_state(void) 1141da177e4SLinus Torvalds { 115353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static inline u32 1191da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds u32 x = 0; 1241da177e4SLinus Torvalds while (nbytes--) { 1251da177e4SLinus Torvalds x *= 37; 1261da177e4SLinus Torvalds x += *cptr++; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds return x; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static struct list_head del_recall_lru; 1321da177e4SLinus Torvalds 13332513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13432513b40SJ. Bruce Fields { 13532513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13632513b40SJ. Bruce Fields } 13732513b40SJ. Bruce Fields 13813cd2184SNeilBrown static inline void 13913cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14013cd2184SNeilBrown { 1418b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1428b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1438b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1448b671b80SJ. Bruce Fields iput(fi->fi_inode); 14532513b40SJ. Bruce Fields nfsd4_free_file(fi); 1468b671b80SJ. Bruce Fields } 14713cd2184SNeilBrown } 14813cd2184SNeilBrown 14913cd2184SNeilBrown static inline void 15013cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15113cd2184SNeilBrown { 1528b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15313cd2184SNeilBrown } 15413cd2184SNeilBrown 155ef0f3390SNeilBrown static int num_delegations; 156c2f1a551SMeelap Shah unsigned int max_delegations; 157ef0f3390SNeilBrown 158ef0f3390SNeilBrown /* 159ef0f3390SNeilBrown * Open owner state (share locks) 160ef0f3390SNeilBrown */ 161ef0f3390SNeilBrown 16216bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16316bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16416bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16516bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 166ef0f3390SNeilBrown 16716bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 168ddc04c41SJ. Bruce Fields { 169ddc04c41SJ. Bruce Fields unsigned int ret; 170ddc04c41SJ. Bruce Fields 171ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 172ddc04c41SJ. Bruce Fields ret += clientid; 17316bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 174ddc04c41SJ. Bruce Fields } 175ef0f3390SNeilBrown 17616bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 177ef0f3390SNeilBrown 178ef0f3390SNeilBrown /* hash table for nfs4_file */ 179ef0f3390SNeilBrown #define FILE_HASH_BITS 8 180ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18135079582SShan Wei 182ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 183ddc04c41SJ. Bruce Fields { 184ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 185ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 186ddc04c41SJ. Bruce Fields } 187ddc04c41SJ. Bruce Fields 188ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 189ef0f3390SNeilBrown 190998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 191f9d7562fSJ. Bruce Fields { 192f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 193f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 194f9d7562fSJ. Bruce Fields } 195f9d7562fSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 197998db52cSJ. Bruce Fields { 198998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 199998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 200998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 201998db52cSJ. Bruce Fields } else 202998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 203998db52cSJ. Bruce Fields } 204998db52cSJ. Bruce Fields 205998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 206f9d7562fSJ. Bruce Fields { 207f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 208f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 209f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields 213998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 214f9d7562fSJ. Bruce Fields { 215f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 216f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2173d02fa29SJ. Bruce Fields /* 2183d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2193d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2203d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2213d02fa29SJ. Bruce Fields */ 2223d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2233d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2243d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 225f9d7562fSJ. Bruce Fields } 226f9d7562fSJ. Bruce Fields } 227f9d7562fSJ. Bruce Fields 228998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 229998db52cSJ. Bruce Fields { 230998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 231998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 232998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 233998db52cSJ. Bruce Fields } else 234998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 235998db52cSJ. Bruce Fields } 236998db52cSJ. Bruce Fields 2376136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23836d44c60SJ. Bruce Fields { 2396136d2b4SJ. Bruce Fields static int min_stateid = 0; 24038c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2416136d2b4SJ. Bruce Fields int new_stid; 2426136d2b4SJ. Bruce Fields int error; 24336d44c60SJ. Bruce Fields 24438c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2456136d2b4SJ. Bruce Fields /* 246996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 247996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 248996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 249996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2506136d2b4SJ. Bruce Fields */ 2516136d2b4SJ. Bruce Fields BUG_ON(error); 2526136d2b4SJ. Bruce Fields /* 2536136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2546136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2556136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2566136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2576136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2586136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2596136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2606136d2b4SJ. Bruce Fields */ 2616136d2b4SJ. Bruce Fields 2626136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2636136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2646136d2b4SJ. Bruce Fields min_stateid = 0; 2656136d2b4SJ. Bruce Fields return new_stid; 26636d44c60SJ. Bruce Fields } 26736d44c60SJ. Bruce Fields 268996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2692a74aba7SJ. Bruce Fields { 2702a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2716136d2b4SJ. Bruce Fields int new_id; 2722a74aba7SJ. Bruce Fields 2732a74aba7SJ. Bruce Fields stid->sc_type = type; 2742a74aba7SJ. Bruce Fields stid->sc_client = cl; 2752a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2766136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2776136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2782a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2792a74aba7SJ. Bruce Fields s->si_generation = 0; 280996e0938SJ. Bruce Fields } 281996e0938SJ. Bruce Fields 282996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 283996e0938SJ. Bruce Fields { 284996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 285996e0938SJ. Bruce Fields 286996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 287996e0938SJ. Bruce Fields return NULL; 288996e0938SJ. Bruce Fields /* 289996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 290996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 291996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 292996e0938SJ. Bruce Fields * preallocated entries. 293996e0938SJ. Bruce Fields */ 294996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2952a74aba7SJ. Bruce Fields } 2962a74aba7SJ. Bruce Fields 2974cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2984cdc951bSJ. Bruce Fields { 2994cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3004cdc951bSJ. Bruce Fields } 3014cdc951bSJ. Bruce Fields 3021da177e4SLinus Torvalds static struct nfs4_delegation * 303dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds struct nfs4_delegation *dp; 3061da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 309c3e48080SJ. Bruce Fields /* 310c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 311c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 312c3e48080SJ. Bruce Fields * write delegations properly. 313c3e48080SJ. Bruce Fields */ 314c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 315c3e48080SJ. Bruce Fields return NULL; 31647f9940cSMeelap Shah if (fp->fi_had_conflict) 31747f9940cSMeelap Shah return NULL; 318c2f1a551SMeelap Shah if (num_delegations > max_delegations) 319ef0f3390SNeilBrown return NULL; 320996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3215b2d21c1SNeilBrown if (dp == NULL) 3221da177e4SLinus Torvalds return dp; 323996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3242a74aba7SJ. Bruce Fields /* 3252a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3266136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3276136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3282a74aba7SJ. Bruce Fields */ 3292a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 330ef0f3390SNeilBrown num_delegations++; 331ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 332ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3331da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33413cd2184SNeilBrown get_nfs4_file(fp); 3351da177e4SLinus Torvalds dp->dl_file = fp; 3361da177e4SLinus Torvalds dp->dl_type = type; 3376c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3381da177e4SLinus Torvalds dp->dl_time = 0; 3391da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 340b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3411da177e4SLinus Torvalds return dp; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds void 3451da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3481da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 34913cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3505b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 351ef0f3390SNeilBrown num_delegations--; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 355acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3561da177e4SLinus Torvalds { 357acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 358acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 359acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3604ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 361acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 362acfdf5c3SJ. Bruce Fields } 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3656136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3666136d2b4SJ. Bruce Fields { 36738c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36838c2f4b1SJ. Bruce Fields 36938c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3706136d2b4SJ. Bruce Fields } 3716136d2b4SJ. Bruce Fields 3721da177e4SLinus Torvalds /* Called under the state lock. */ 3731da177e4SLinus Torvalds static void 3741da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3751da177e4SLinus Torvalds { 3766136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 377ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3781da177e4SLinus Torvalds spin_lock(&recall_lock); 3795d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3801da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3811da177e4SLinus Torvalds spin_unlock(&recall_lock); 382acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3831da177e4SLinus Torvalds nfs4_put_delegation(dp); 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds /* 3871da177e4SLinus Torvalds * SETCLIENTID state 3881da177e4SLinus Torvalds */ 3891da177e4SLinus Torvalds 39036acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3919089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3929089f1b4SBenny Halevy 3931da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3941da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3951da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3961da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3971da177e4SLinus Torvalds 398ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 399ddc04c41SJ. Bruce Fields { 400ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 401ddc04c41SJ. Bruce Fields } 402ddc04c41SJ. Bruce Fields 403ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 404ddc04c41SJ. Bruce Fields { 405ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 406ddc04c41SJ. Bruce Fields } 407ddc04c41SJ. Bruce Fields 4081da177e4SLinus Torvalds /* 4091da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4101da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4111da177e4SLinus Torvalds * 4121da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4131da177e4SLinus Torvalds * setclientid_confirmed info. 4141da177e4SLinus Torvalds * 4151da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4161da177e4SLinus Torvalds * setclientid info. 4171da177e4SLinus Torvalds * 4181da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4191da177e4SLinus Torvalds * for lease renewal. 4201da177e4SLinus Torvalds * 4211da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4221da177e4SLinus Torvalds * for last close replay. 4231da177e4SLinus Torvalds */ 4241da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4251da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4261da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4271da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4291da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head client_lru; 4311da177e4SLinus Torvalds static struct list_head close_lru; 4321da177e4SLinus Torvalds 433f9d7562fSJ. Bruce Fields /* 434f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 435f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 436f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 437f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 438f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 439f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 440f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 441f9d7562fSJ. Bruce Fields * 442f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 443f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 444f9d7562fSJ. Bruce Fields * 445f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 446f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 447f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 448f9d7562fSJ. Bruce Fields * 449f9d7562fSJ. Bruce Fields * which we should reject. 450f9d7562fSJ. Bruce Fields */ 4515ae037e5SJeff Layton static unsigned int 4525ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 453f9d7562fSJ. Bruce Fields int i; 4545ae037e5SJeff Layton unsigned int access = 0; 455f9d7562fSJ. Bruce Fields 456f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 457f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4585ae037e5SJeff Layton access |= i; 459f9d7562fSJ. Bruce Fields } 4605ae037e5SJeff Layton return access; 461f9d7562fSJ. Bruce Fields } 462f9d7562fSJ. Bruce Fields 4633a328614SJeff Layton static bool 464dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 465f9d7562fSJ. Bruce Fields unsigned int access, deny; 466f9d7562fSJ. Bruce Fields 4675ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4685ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 469f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4703a328614SJeff Layton return false; 4713a328614SJeff Layton return true; 472f9d7562fSJ. Bruce Fields } 473f9d7562fSJ. Bruce Fields 47482c5ff1bSJeff Layton /* set share access for a given stateid */ 47582c5ff1bSJeff Layton static inline void 47682c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 47782c5ff1bSJeff Layton { 47882c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 47982c5ff1bSJeff Layton } 48082c5ff1bSJeff Layton 48182c5ff1bSJeff Layton /* clear share access for a given stateid */ 48282c5ff1bSJeff Layton static inline void 48382c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48482c5ff1bSJeff Layton { 48582c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48682c5ff1bSJeff Layton } 48782c5ff1bSJeff Layton 48882c5ff1bSJeff Layton /* test whether a given stateid has access */ 48982c5ff1bSJeff Layton static inline bool 49082c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49182c5ff1bSJeff Layton { 49282c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49382c5ff1bSJeff Layton } 49482c5ff1bSJeff Layton 495ce0fc43cSJeff Layton /* set share deny for a given stateid */ 496ce0fc43cSJeff Layton static inline void 497ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 498ce0fc43cSJeff Layton { 499ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 500ce0fc43cSJeff Layton } 501ce0fc43cSJeff Layton 502ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 503ce0fc43cSJeff Layton static inline void 504ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 505ce0fc43cSJeff Layton { 506ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 507ce0fc43cSJeff Layton } 508ce0fc43cSJeff Layton 509ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 510ce0fc43cSJeff Layton static inline bool 511ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 512ce0fc43cSJeff Layton { 513ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 514ce0fc43cSJeff Layton } 515ce0fc43cSJeff Layton 516f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 517f9d7562fSJ. Bruce Fields { 5188f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 519f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 520f9d7562fSJ. Bruce Fields return O_RDONLY; 521f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 522f9d7562fSJ. Bruce Fields return O_WRONLY; 523f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 524f9d7562fSJ. Bruce Fields return O_RDWR; 525f9d7562fSJ. Bruce Fields } 526f9d7562fSJ. Bruce Fields BUG(); 527f9d7562fSJ. Bruce Fields } 528f9d7562fSJ. Bruce Fields 52982c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53082c5ff1bSJeff Layton static void 53182c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53282c5ff1bSJeff Layton { 53382c5ff1bSJeff Layton int i; 53482c5ff1bSJeff Layton 53582c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53682c5ff1bSJeff Layton if (test_access(i, stp)) 53782c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 53882c5ff1bSJeff Layton nfs4_access_to_omode(i)); 53982c5ff1bSJeff Layton clear_access(i, stp); 54082c5ff1bSJeff Layton } 54182c5ff1bSJeff Layton } 54282c5ff1bSJeff Layton 543dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 544529d7b2aSJ. Bruce Fields { 545529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 546529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 547529d7b2aSJ. Bruce Fields } 548529d7b2aSJ. Bruce Fields 549dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 550529d7b2aSJ. Bruce Fields { 55182c5ff1bSJeff Layton release_all_access(stp); 552a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5534665e2baSJ. Bruce Fields stp->st_file = NULL; 5544665e2baSJ. Bruce Fields } 5554665e2baSJ. Bruce Fields 556dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5574665e2baSJ. Bruce Fields { 558529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 559529d7b2aSJ. Bruce Fields } 560529d7b2aSJ. Bruce Fields 561dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 562529d7b2aSJ. Bruce Fields { 563529d7b2aSJ. Bruce Fields struct file *file; 564529d7b2aSJ. Bruce Fields 565529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5666136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 567529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 568529d7b2aSJ. Bruce Fields if (file) 569fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57038c387b5SJ. Bruce Fields close_generic_stateid(stp); 571529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 572529d7b2aSJ. Bruce Fields } 573529d7b2aSJ. Bruce Fields 574fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 575529d7b2aSJ. Bruce Fields { 576dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 577529d7b2aSJ. Bruce Fields 578fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 579fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 580009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 581fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 582fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 583dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 584529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 585529d7b2aSJ. Bruce Fields } 586529d7b2aSJ. Bruce Fields } 587529d7b2aSJ. Bruce Fields 588fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 589529d7b2aSJ. Bruce Fields { 590fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 591fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 592529d7b2aSJ. Bruce Fields } 593529d7b2aSJ. Bruce Fields 594529d7b2aSJ. Bruce Fields static void 595dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 596529d7b2aSJ. Bruce Fields { 597fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 598529d7b2aSJ. Bruce Fields 599529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 600fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 601fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 602fe0750e5SJ. Bruce Fields release_lockowner(lo); 603529d7b2aSJ. Bruce Fields } 604529d7b2aSJ. Bruce Fields } 605529d7b2aSJ. Bruce Fields 60638c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6072283963fSJ. Bruce Fields { 6082283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6092283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61038c387b5SJ. Bruce Fields close_generic_stateid(stp); 61138c387b5SJ. Bruce Fields } 61238c387b5SJ. Bruce Fields 61338c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61438c387b5SJ. Bruce Fields { 61538c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6166136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6172283963fSJ. Bruce Fields free_generic_stateid(stp); 6182283963fSJ. Bruce Fields } 6192283963fSJ. Bruce Fields 620fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 621f1d110caSJ. Bruce Fields { 622dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 623f1d110caSJ. Bruce Fields 624fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 625fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 626fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 627fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 628dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 629f1d110caSJ. Bruce Fields release_open_stateid(stp); 630f1d110caSJ. Bruce Fields } 631f1d110caSJ. Bruce Fields } 632f1d110caSJ. Bruce Fields 633f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 634f7a4d872SJ. Bruce Fields { 635f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 636f7a4d872SJ. Bruce Fields 637f7a4d872SJ. Bruce Fields if (s) { 6386136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 639f7a4d872SJ. Bruce Fields free_generic_stateid(s); 640f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 641f7a4d872SJ. Bruce Fields } 642f7a4d872SJ. Bruce Fields } 643f7a4d872SJ. Bruce Fields 644fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 645f1d110caSJ. Bruce Fields { 646fe0750e5SJ. Bruce Fields unhash_openowner(oo); 647fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 648f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 649fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 650f1d110caSJ. Bruce Fields } 651f1d110caSJ. Bruce Fields 6525282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6535282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6545282fd72SMarc Eshel 6555282fd72SMarc Eshel static inline int 6565282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6575282fd72SMarc Eshel { 6585282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6595282fd72SMarc Eshel 6605282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6615282fd72SMarc Eshel } 6625282fd72SMarc Eshel 6638f199b82STrond Myklebust #ifdef NFSD_DEBUG 6645282fd72SMarc Eshel static inline void 6655282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6665282fd72SMarc Eshel { 6675282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6685282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6695282fd72SMarc Eshel } 6708f199b82STrond Myklebust #else 6718f199b82STrond Myklebust static inline void 6728f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6738f199b82STrond Myklebust { 6748f199b82STrond Myklebust } 6758f199b82STrond Myklebust #endif 6768f199b82STrond Myklebust 6775282fd72SMarc Eshel 678ec6b5d7bSAndy Adamson static void 679ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 680ec6b5d7bSAndy Adamson { 681ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 682ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 683ec6b5d7bSAndy Adamson 684ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 685ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 686ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 687ec6b5d7bSAndy Adamson sid->reserved = 0; 688ec6b5d7bSAndy Adamson } 689ec6b5d7bSAndy Adamson 690ec6b5d7bSAndy Adamson /* 691a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 692a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 693a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 694a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 695a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 696a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 697a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 698a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 699a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 700a649637cSAndy Adamson * for the SEQUENCE op response: 701ec6b5d7bSAndy Adamson */ 702a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 703a649637cSAndy Adamson 704557ce264SAndy Adamson static void 705557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 706557ce264SAndy Adamson { 707557ce264SAndy Adamson int i; 708557ce264SAndy Adamson 709557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 710557ce264SAndy Adamson kfree(ses->se_slots[i]); 711557ce264SAndy Adamson } 712557ce264SAndy Adamson 713efe0cb6dSJ. Bruce Fields /* 714efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 715efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 716efe0cb6dSJ. Bruce Fields */ 717efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 718efe0cb6dSJ. Bruce Fields { 719efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 720efe0cb6dSJ. Bruce Fields } 721efe0cb6dSJ. Bruce Fields 7225b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 723ec6b5d7bSAndy Adamson { 7245b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7255b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 726ec6b5d7bSAndy Adamson 7275b6feee9SJ. Bruce Fields return size; 728557ce264SAndy Adamson } 729557ce264SAndy Adamson 7305b6feee9SJ. Bruce Fields /* 7315b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7325b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73342b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7345b6feee9SJ. Bruce Fields */ 7355b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7365b6feee9SJ. Bruce Fields { 7375b6feee9SJ. Bruce Fields int avail; 7385b6feee9SJ. Bruce Fields 7395b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7405b6feee9SJ. Bruce Fields 7415b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7425b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7435b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7445b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7455b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7465b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7475b6feee9SJ. Bruce Fields 7485b6feee9SJ. Bruce Fields return num; 7495b6feee9SJ. Bruce Fields } 7505b6feee9SJ. Bruce Fields 7515b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7525b6feee9SJ. Bruce Fields { 7535b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7545b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7555b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7565b6feee9SJ. Bruce Fields } 7575b6feee9SJ. Bruce Fields 7585b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7595b6feee9SJ. Bruce Fields { 7605b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7615b6feee9SJ. Bruce Fields int mem, i; 762ec6b5d7bSAndy Adamson 763c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 764ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7655b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 766ec6b5d7bSAndy Adamson 7675b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7686c18ba9fSAlexandros Batsakis if (!new) 7695b6feee9SJ. Bruce Fields return NULL; 770ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7715b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7725b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7735b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7745b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 775ec6b5d7bSAndy Adamson goto out_free; 776ec6b5d7bSAndy Adamson } 7775b6feee9SJ. Bruce Fields return new; 7785b6feee9SJ. Bruce Fields out_free: 7795b6feee9SJ. Bruce Fields while (i--) 7805b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7815b6feee9SJ. Bruce Fields kfree(new); 7825b6feee9SJ. Bruce Fields return NULL; 7835b6feee9SJ. Bruce Fields } 7845b6feee9SJ. Bruce Fields 7855b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7865b6feee9SJ. Bruce Fields { 7875b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7885b6feee9SJ. Bruce Fields 7895b6feee9SJ. Bruce Fields new->maxreqs = numslots; 790d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 791d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7925b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7935b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7945b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7955b6feee9SJ. Bruce Fields } 7965b6feee9SJ. Bruce Fields 79719cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 79819cf5c02SJ. Bruce Fields { 79919cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80019cf5c02SJ. Bruce Fields kfree(c); 80119cf5c02SJ. Bruce Fields } 80219cf5c02SJ. Bruce Fields 80319cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80419cf5c02SJ. Bruce Fields { 80519cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80619cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 80719cf5c02SJ. Bruce Fields 80819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 80919cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81019cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81119cf5c02SJ. Bruce Fields free_conn(c); 81219cf5c02SJ. Bruce Fields } 81319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 814eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81519cf5c02SJ. Bruce Fields } 81619cf5c02SJ. Bruce Fields 817d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 818c7662518SJ. Bruce Fields { 819c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 820c7662518SJ. Bruce Fields 821c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 822c7662518SJ. Bruce Fields if (!conn) 823db90681dSJ. Bruce Fields return NULL; 824c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 825c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 826d29c374cSJ. Bruce Fields conn->cn_flags = flags; 827db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 828db90681dSJ. Bruce Fields return conn; 829db90681dSJ. Bruce Fields } 830db90681dSJ. Bruce Fields 831328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 832328ead28SJ. Bruce Fields { 833328ead28SJ. Bruce Fields conn->cn_session = ses; 834328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 835328ead28SJ. Bruce Fields } 836328ead28SJ. Bruce Fields 837db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 838db90681dSJ. Bruce Fields { 839db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 840c7662518SJ. Bruce Fields 841c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 842328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 843c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 844db90681dSJ. Bruce Fields } 845c7662518SJ. Bruce Fields 84621b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 847db90681dSJ. Bruce Fields { 84819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 84921b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 850db90681dSJ. Bruce Fields } 851db90681dSJ. Bruce Fields 8521d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 853db90681dSJ. Bruce Fields { 854db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85521b75b01SJ. Bruce Fields int ret; 856db90681dSJ. Bruce Fields 8571d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 858db90681dSJ. Bruce Fields if (!conn) 859db90681dSJ. Bruce Fields return nfserr_jukebox; 860db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86121b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86221b75b01SJ. Bruce Fields if (ret) 86321b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86421b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 865c7662518SJ. Bruce Fields return nfs_ok; 866c7662518SJ. Bruce Fields } 867c7662518SJ. Bruce Fields 8681d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8691d1bc8f2SJ. Bruce Fields { 8701d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8711d1bc8f2SJ. Bruce Fields 8721d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8731d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8741d1bc8f2SJ. Bruce Fields 8751d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8761d1bc8f2SJ. Bruce Fields } 8771d1bc8f2SJ. Bruce Fields 8781d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 87919cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 880c7662518SJ. Bruce Fields { 88119cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 88219cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 88319cf5c02SJ. Bruce Fields 88419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 88519cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 88619cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 88719cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 88819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 88919cf5c02SJ. Bruce Fields 89019cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89119cf5c02SJ. Bruce Fields free_conn(c); 89219cf5c02SJ. Bruce Fields 89319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89419cf5c02SJ. Bruce Fields } 89519cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 896c7662518SJ. Bruce Fields } 897c7662518SJ. Bruce Fields 898508dc6e1SBenny Halevy static void free_session(struct kref *kref) 899c7662518SJ. Bruce Fields { 900c7662518SJ. Bruce Fields struct nfsd4_session *ses; 901c7662518SJ. Bruce Fields int mem; 902c7662518SJ. Bruce Fields 903508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 904c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 90519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 906c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 907c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 908c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 909c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 910c7662518SJ. Bruce Fields free_session_slots(ses); 911c7662518SJ. Bruce Fields kfree(ses); 912c7662518SJ. Bruce Fields } 913c7662518SJ. Bruce Fields 914508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 915508dc6e1SBenny Halevy { 916508dc6e1SBenny Halevy spin_lock(&client_lock); 917508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 918508dc6e1SBenny Halevy spin_unlock(&client_lock); 919508dc6e1SBenny Halevy } 920508dc6e1SBenny Halevy 921ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9225b6feee9SJ. Bruce Fields { 9235b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9245b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9255b6feee9SJ. Bruce Fields int numslots, slotsize; 92657b7b43bSJ. Bruce Fields __be32 status; 9275b6feee9SJ. Bruce Fields int idx; 9285b6feee9SJ. Bruce Fields 9295b6feee9SJ. Bruce Fields /* 9305b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9315b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9325b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9335b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9345b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9355b6feee9SJ. Bruce Fields */ 9365b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9375b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 938ced6dfe9SMi Jinlong if (numslots < 1) 939ced6dfe9SMi Jinlong return NULL; 9405b6feee9SJ. Bruce Fields 9415b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9425b6feee9SJ. Bruce Fields if (!new) { 9435b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 944ac7c46f2SJ. Bruce Fields return NULL; 9455b6feee9SJ. Bruce Fields } 9465b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 947ec6b5d7bSAndy Adamson 948ec6b5d7bSAndy Adamson new->se_client = clp; 949ec6b5d7bSAndy Adamson gen_sessionid(new); 950ec6b5d7bSAndy Adamson 951c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 952c7662518SJ. Bruce Fields 953ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 954ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9558b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 956ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9575b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9589089f1b4SBenny Halevy spin_lock(&client_lock); 959ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9604c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 961ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9624c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9639089f1b4SBenny Halevy spin_unlock(&client_lock); 964ec6b5d7bSAndy Adamson 9651d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 966ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 967c7662518SJ. Bruce Fields if (status) { 968508dc6e1SBenny Halevy spin_lock(&client_lock); 969c7662518SJ. Bruce Fields free_session(&new->se_ref); 970508dc6e1SBenny Halevy spin_unlock(&client_lock); 971ac7c46f2SJ. Bruce Fields return NULL; 972c7662518SJ. Bruce Fields } 973dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 974edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 975dcbeaa68SJ. Bruce Fields /* 976dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 977dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 978dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 979dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 980dcbeaa68SJ. Bruce Fields * future: 981dcbeaa68SJ. Bruce Fields */ 982edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 983edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 984edd76786SJ. Bruce Fields } 985dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 986ac7c46f2SJ. Bruce Fields return new; 987ec6b5d7bSAndy Adamson } 988ec6b5d7bSAndy Adamson 9899089f1b4SBenny Halevy /* caller must hold client_lock */ 9905282fd72SMarc Eshel static struct nfsd4_session * 9915282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9925282fd72SMarc Eshel { 9935282fd72SMarc Eshel struct nfsd4_session *elem; 9945282fd72SMarc Eshel int idx; 9955282fd72SMarc Eshel 9965282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9975282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9985282fd72SMarc Eshel /* Search in the appropriate list */ 9995282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10005282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10015282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10025282fd72SMarc Eshel return elem; 10035282fd72SMarc Eshel } 10045282fd72SMarc Eshel } 10055282fd72SMarc Eshel 10065282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10075282fd72SMarc Eshel return NULL; 10085282fd72SMarc Eshel } 10095282fd72SMarc Eshel 10109089f1b4SBenny Halevy /* caller must hold client_lock */ 10117116ed6bSAndy Adamson static void 10125282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10137116ed6bSAndy Adamson { 10147116ed6bSAndy Adamson list_del(&ses->se_hash); 10154c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10167116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10174c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10185282fd72SMarc Eshel } 10195282fd72SMarc Eshel 102036acb66bSBenny Halevy /* must be called under the client_lock */ 10211da177e4SLinus Torvalds static inline void 102236acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10231da177e4SLinus Torvalds { 102407cd4909SBenny Halevy if (is_client_expired(clp)) { 102507cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 102607cd4909SBenny Halevy __func__, 102707cd4909SBenny Halevy clp->cl_clientid.cl_boot, 102807cd4909SBenny Halevy clp->cl_clientid.cl_id); 102907cd4909SBenny Halevy return; 103007cd4909SBenny Halevy } 103107cd4909SBenny Halevy 10321da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10331da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10341da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10351da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10361da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 103936acb66bSBenny Halevy static inline void 104036acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 104136acb66bSBenny Halevy { 104236acb66bSBenny Halevy spin_lock(&client_lock); 104336acb66bSBenny Halevy renew_client_locked(clp); 104436acb66bSBenny Halevy spin_unlock(&client_lock); 104536acb66bSBenny Halevy } 104636acb66bSBenny Halevy 10471da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10481da177e4SLinus Torvalds static int 10491da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10521da177e4SLinus Torvalds return 0; 105360adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 105460adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10551da177e4SLinus Torvalds return 1; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds /* 10591da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10601da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10611da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10621da177e4SLinus Torvalds */ 106335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds struct nfs4_client *clp; 10661da177e4SLinus Torvalds 106735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 106835bba9a3SJ. Bruce Fields if (clp == NULL) 106935bba9a3SJ. Bruce Fields return NULL; 107067114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 107135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 107235bba9a3SJ. Bruce Fields kfree(clp); 107335bba9a3SJ. Bruce Fields return NULL; 107435bba9a3SJ. Bruce Fields } 10751da177e4SLinus Torvalds clp->cl_name.len = name.len; 10761da177e4SLinus Torvalds return clp; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static inline void 10801da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10811da177e4SLinus Torvalds { 1082508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 1083792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1084792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1085792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1086792c95ddSJ. Bruce Fields se_perclnt); 1087792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1088508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1089792c95ddSJ. Bruce Fields } 109003a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10911da177e4SLinus Torvalds kfree(clp->cl_name.data); 10921da177e4SLinus Torvalds kfree(clp); 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 1095d7682988SBenny Halevy void 1096d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1097d7682988SBenny Halevy { 1098d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1099d7682988SBenny Halevy 1100d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1101d7682988SBenny Halevy return; 1102d7682988SBenny Halevy if (is_client_expired(clp)) { 1103d7682988SBenny Halevy free_client(clp); 1104d7682988SBenny Halevy session->se_client = NULL; 1105d7682988SBenny Halevy } else 1106d7682988SBenny Halevy renew_client_locked(clp); 1107d7682988SBenny Halevy spin_unlock(&client_lock); 1108d7682988SBenny Halevy } 1109d7682988SBenny Halevy 111084d38ac9SBenny Halevy /* must be called under the client_lock */ 111184d38ac9SBenny Halevy static inline void 111284d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 111384d38ac9SBenny Halevy { 1114792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1115792c95ddSJ. Bruce Fields 111607cd4909SBenny Halevy mark_client_expired(clp); 111784d38ac9SBenny Halevy list_del(&clp->cl_lru); 11184c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1119792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1120792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11214c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 112284d38ac9SBenny Halevy } 112384d38ac9SBenny Halevy 11241da177e4SLinus Torvalds static void 11251da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11261da177e4SLinus Torvalds { 1127fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11281da177e4SLinus Torvalds struct nfs4_delegation *dp; 11291da177e4SLinus Torvalds struct list_head reaplist; 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11321da177e4SLinus Torvalds spin_lock(&recall_lock); 1133ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1134ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1135ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11361da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds spin_unlock(&recall_lock); 11391da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11401da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11411da177e4SLinus Torvalds unhash_delegation(dp); 11421da177e4SLinus Torvalds } 1143ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1144fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1145fe0750e5SJ. Bruce Fields release_openowner(oo); 11461da177e4SLinus Torvalds } 11476ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11482bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11492bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 115084d38ac9SBenny Halevy list_del(&clp->cl_idhash); 115184d38ac9SBenny Halevy list_del(&clp->cl_strhash); 115284d38ac9SBenny Halevy spin_lock(&client_lock); 115384d38ac9SBenny Halevy unhash_client_locked(clp); 115446583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1155b12a05cbSJ. Bruce Fields free_client(clp); 115646583e25SBenny Halevy spin_unlock(&client_lock); 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 115935bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116035bba9a3SJ. Bruce Fields { 116135bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 116235bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 116535bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 116635bba9a3SJ. Bruce Fields { 11671da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11681da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 117103a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 117235bba9a3SJ. Bruce Fields { 117303a4e1f6SJ. Bruce Fields if (source->cr_principal) { 117403a4e1f6SJ. Bruce Fields target->cr_principal = 117503a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 117603a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 117703a4e1f6SJ. Bruce Fields return -ENOMEM; 117803a4e1f6SJ. Bruce Fields } else 117903a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1180d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11811da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11821da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11831da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11841da177e4SLinus Torvalds get_group_info(target->cr_group_info); 118503a4e1f6SJ. Bruce Fields return 0; 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds 118835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1189599e0a22SJ. Bruce Fields { 1190a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds static int 1194599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1195599e0a22SJ. Bruce Fields { 1196599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static int 1200599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1201599e0a22SJ. Bruce Fields { 1202599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12058fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12068fbba96eSJ. Bruce Fields { 12078fbba96eSJ. Bruce Fields int i; 12088fbba96eSJ. Bruce Fields 12098fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12108fbba96eSJ. Bruce Fields return false; 12118fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12128fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12138fbba96eSJ. Bruce Fields return false; 12148fbba96eSJ. Bruce Fields return true; 12158fbba96eSJ. Bruce Fields } 12168fbba96eSJ. Bruce Fields 12171da177e4SLinus Torvalds static int 1218599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1219599e0a22SJ. Bruce Fields { 1220d5497fc6SJ. Bruce Fields if ((cr1->cr_flavor != cr2->cr_flavor) 1221d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12228fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12238fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12248fbba96eSJ. Bruce Fields return false; 12258fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12268fbba96eSJ. Bruce Fields return true; 12278fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12288fbba96eSJ. Bruce Fields return false; 12298fbba96eSJ. Bruce Fields return 0 == strcmp(cr1->cr_principal, cr1->cr_principal); 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds 12325ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12335ec7b46cSJ. Bruce Fields { 12345ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12355ec7b46cSJ. Bruce Fields 12361da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 12371da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds 1240deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1241deda2faaSJ. Bruce Fields { 1242ab4684d1SChuck Lever __be32 verf[2]; 1243deda2faaSJ. Bruce Fields static u32 i; 12441da177e4SLinus Torvalds 1245ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1246ab4684d1SChuck Lever verf[1] = (__be32)i++; 1247ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 125038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12514581d140SJ. Bruce Fields { 125238c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12534581d140SJ. Bruce Fields } 12544d71ab87SJ. Bruce Fields 125538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1256f459e453SJ. Bruce Fields { 1257f459e453SJ. Bruce Fields struct nfs4_stid *s; 1258f459e453SJ. Bruce Fields 125938c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1260f459e453SJ. Bruce Fields if (!s) 1261f459e453SJ. Bruce Fields return NULL; 1262f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12634d71ab87SJ. Bruce Fields return s; 12644581d140SJ. Bruce Fields return NULL; 12654581d140SJ. Bruce Fields } 12664581d140SJ. Bruce Fields 1267b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1268b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1269b09333c4SRicardo Labiaga { 1270b09333c4SRicardo Labiaga struct nfs4_client *clp; 1271b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 127203a4e1f6SJ. Bruce Fields int ret; 1273b09333c4SRicardo Labiaga 1274b09333c4SRicardo Labiaga clp = alloc_client(name); 1275b09333c4SRicardo Labiaga if (clp == NULL) 1276b09333c4SRicardo Labiaga return NULL; 1277b09333c4SRicardo Labiaga 1278792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 127903a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 128003a4e1f6SJ. Bruce Fields if (ret) { 1281508dc6e1SBenny Halevy spin_lock(&client_lock); 1282b09333c4SRicardo Labiaga free_client(clp); 1283508dc6e1SBenny Halevy spin_unlock(&client_lock); 1284b09333c4SRicardo Labiaga return NULL; 1285b09333c4SRicardo Labiaga } 128638c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1287b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 128846583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 128977a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1290b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1291b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1292b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1293b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1294b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12955ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12966ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1297cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 129807cd4909SBenny Halevy clp->cl_time = get_seconds(); 1299b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1300b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1301b09333c4SRicardo Labiaga copy_verf(clp, verf); 1302b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1303b09333c4SRicardo Labiaga gen_confirm(clp); 1304edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1305b09333c4SRicardo Labiaga return clp; 1306b09333c4SRicardo Labiaga } 1307b09333c4SRicardo Labiaga 1308fd39ca9aSNeilBrown static void 13091da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13101da177e4SLinus Torvalds { 13111da177e4SLinus Torvalds unsigned int idhashval; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13141da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13151da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 131636acb66bSBenny Halevy renew_client(clp); 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds 1319fd39ca9aSNeilBrown static void 13201da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13211da177e4SLinus Torvalds { 13221da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13231da177e4SLinus Torvalds unsigned int strhashval; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1326f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1327a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1328328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13291da177e4SLinus Torvalds renew_client(clp); 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds static struct nfs4_client * 13331da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13341da177e4SLinus Torvalds { 13351da177e4SLinus Torvalds struct nfs4_client *clp; 13361da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1339a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1340a50d2ad1SJ. Bruce Fields renew_client(clp); 13411da177e4SLinus Torvalds return clp; 13421da177e4SLinus Torvalds } 1343a50d2ad1SJ. Bruce Fields } 13441da177e4SLinus Torvalds return NULL; 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds static struct nfs4_client * 13481da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13491da177e4SLinus Torvalds { 13501da177e4SLinus Torvalds struct nfs4_client *clp; 13511da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1354599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13551da177e4SLinus Torvalds return clp; 13561da177e4SLinus Torvalds } 13571da177e4SLinus Torvalds return NULL; 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds 13606e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1361a1bcecd2SAndy Adamson { 13626e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1363a1bcecd2SAndy Adamson } 1364a1bcecd2SAndy Adamson 136528ce6054SNeilBrown static struct nfs4_client * 1366e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 136728ce6054SNeilBrown { 136828ce6054SNeilBrown struct nfs4_client *clp; 136928ce6054SNeilBrown 137028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1371e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 137228ce6054SNeilBrown return clp; 137328ce6054SNeilBrown } 137428ce6054SNeilBrown return NULL; 137528ce6054SNeilBrown } 137628ce6054SNeilBrown 137728ce6054SNeilBrown static struct nfs4_client * 1378e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 137928ce6054SNeilBrown { 138028ce6054SNeilBrown struct nfs4_client *clp; 138128ce6054SNeilBrown 138228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1383e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 138428ce6054SNeilBrown return clp; 138528ce6054SNeilBrown } 138628ce6054SNeilBrown return NULL; 138728ce6054SNeilBrown } 138828ce6054SNeilBrown 1389fd39ca9aSNeilBrown static void 13906f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13911da177e4SLinus Torvalds { 139207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13936f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13946f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13957077ecbaSJeff Layton unsigned short expected_family; 13961da177e4SLinus Torvalds 13977077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13987077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13997077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14007077ecbaSJeff Layton expected_family = AF_INET; 14017077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14027077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14037077ecbaSJeff Layton expected_family = AF_INET6; 14047077ecbaSJeff Layton else 14051da177e4SLinus Torvalds goto out_err; 14061da177e4SLinus Torvalds 1407f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1408aa9a4ec7SJeff Layton se->se_callback_addr_len, 140907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 141007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1411aa9a4ec7SJeff Layton 141207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14131da177e4SLinus Torvalds goto out_err; 1414aa9a4ec7SJeff Layton 141507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 141607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1417fbf4665fSJeff Layton 141807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 141907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1420849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14211da177e4SLinus Torvalds return; 14221da177e4SLinus Torvalds out_err: 142307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 142407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1425849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14261da177e4SLinus Torvalds "will not receive delegations\n", 14271da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds return; 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds 1432074fe897SAndy Adamson /* 1433557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1434074fe897SAndy Adamson */ 1435074fe897SAndy Adamson void 1436074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1437074fe897SAndy Adamson { 1438557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1439557ce264SAndy Adamson unsigned int base; 1440074fe897SAndy Adamson 1441557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1442074fe897SAndy Adamson 1443557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1444557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1445bf864a31SAndy Adamson 1446bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1447bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1448557ce264SAndy Adamson slot->sl_datalen = 0; 1449bf864a31SAndy Adamson return; 1450bf864a31SAndy Adamson } 1451557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1452557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1453557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1454557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1455557ce264SAndy Adamson slot->sl_datalen)) 1456557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1457557ce264SAndy Adamson return; 1458074fe897SAndy Adamson } 1459074fe897SAndy Adamson 1460074fe897SAndy Adamson /* 1461abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1462abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1463abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1464abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1465abfabf8cSAndy Adamson * 1466074fe897SAndy Adamson */ 1467abfabf8cSAndy Adamson static __be32 1468abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1469abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1470074fe897SAndy Adamson { 1471abfabf8cSAndy Adamson struct nfsd4_op *op; 1472abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1473074fe897SAndy Adamson 1474abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1475abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1476abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1477abfabf8cSAndy Adamson 1478abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 147973e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1480abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1481abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1482abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1483074fe897SAndy Adamson } 1484abfabf8cSAndy Adamson return op->status; 1485074fe897SAndy Adamson } 1486074fe897SAndy Adamson 1487074fe897SAndy Adamson /* 1488557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1489557ce264SAndy Adamson * session values. 1490074fe897SAndy Adamson */ 1491074fe897SAndy Adamson __be32 1492bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1493bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1494074fe897SAndy Adamson { 1495557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1496074fe897SAndy Adamson __be32 status; 1497074fe897SAndy Adamson 1498557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1499074fe897SAndy Adamson 1500abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1501abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1502abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1503abfabf8cSAndy Adamson return status; 1504074fe897SAndy Adamson 1505557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1506557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1507074fe897SAndy Adamson 1508557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1509557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1510557ce264SAndy Adamson status = slot->sl_status; 1511074fe897SAndy Adamson 1512074fe897SAndy Adamson return status; 1513074fe897SAndy Adamson } 1514074fe897SAndy Adamson 15150733d213SAndy Adamson /* 15160733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15170733d213SAndy Adamson */ 15180733d213SAndy Adamson static void 15190733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15200733d213SAndy Adamson { 15210733d213SAndy Adamson /* pNFS is not supported */ 15220733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15230733d213SAndy Adamson 15240733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15250733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15260733d213SAndy Adamson 15270733d213SAndy Adamson /* set the wire flags to return to client. */ 15280733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15290733d213SAndy Adamson } 15300733d213SAndy Adamson 1531631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1532631fc9eaSJ. Bruce Fields { 1533631fc9eaSJ. Bruce Fields /* 1534631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1535631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1536631fc9eaSJ. Bruce Fields * 1537631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1538631fc9eaSJ. Bruce Fields */ 1539631fc9eaSJ. Bruce Fields return list_empty(&clp->cl_openowners) 1540631fc9eaSJ. Bruce Fields && list_empty(&clp->cl_delegations) 1541631fc9eaSJ. Bruce Fields && list_empty(&clp->cl_sessions); 1542631fc9eaSJ. Bruce Fields } 1543631fc9eaSJ. Bruce Fields 1544b37ad28bSAl Viro __be32 1545069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1546069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1547069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1548069b6ad4SAndy Adamson { 15490733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 155057b7b43bSJ. Bruce Fields __be32 status; 15510733d213SAndy Adamson unsigned int strhashval; 15520733d213SAndy Adamson char dname[HEXDIR_LEN]; 1553363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15540733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1555363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 155683e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15570733d213SAndy Adamson 1558363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15590733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1560363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15610733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1562363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15630733d213SAndy Adamson 1564a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15650733d213SAndy Adamson return nfserr_inval; 15660733d213SAndy Adamson 15670733d213SAndy Adamson /* Currently only support SP4_NONE */ 15680733d213SAndy Adamson switch (exid->spa_how) { 15690733d213SAndy Adamson case SP4_NONE: 15700733d213SAndy Adamson break; 15710733d213SAndy Adamson case SP4_SSV: 1572044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15730733d213SAndy Adamson default: 15740733d213SAndy Adamson BUG(); /* checked by xdr code */ 15750733d213SAndy Adamson case SP4_MACH_CRED: 15760733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15770733d213SAndy Adamson } 15780733d213SAndy Adamson 15790733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15800733d213SAndy Adamson 15810733d213SAndy Adamson if (status) 15822786cc3aSJ. Bruce Fields return status; 15830733d213SAndy Adamson 15840733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15850733d213SAndy Adamson 15862dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 15870733d213SAndy Adamson nfs4_lock_state(); 1588e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15890733d213SAndy Adamson if (conf) { 159083e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 159183e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 159283e08fd4SJ. Bruce Fields 1593136e658dSJ. Bruce Fields if (update) { 1594136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 15952dbb269dSJ. Bruce Fields status = nfserr_inval; 1596e203d506SJ. Bruce Fields goto out; 1597e203d506SJ. Bruce Fields } 15982dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 1599ea236d07SJ. Bruce Fields status = nfserr_perm; 1600ea236d07SJ. Bruce Fields goto out; 1601ea236d07SJ. Bruce Fields } 16022dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16030733d213SAndy Adamson status = nfserr_not_same; 16040733d213SAndy Adamson goto out; 16050733d213SAndy Adamson } 1606136e658dSJ. Bruce Fields /* case 6 */ 1607136e658dSJ. Bruce Fields exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 1608136e658dSJ. Bruce Fields new = conf; 1609136e658dSJ. Bruce Fields goto out_copy; 1610136e658dSJ. Bruce Fields } 1611136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1612631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1613136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1614136e658dSJ. Bruce Fields goto out; 1615136e658dSJ. Bruce Fields } 1616631fc9eaSJ. Bruce Fields goto expire_client; 1617631fc9eaSJ. Bruce Fields } 1618136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 1619136e658dSJ. Bruce Fields exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 1620136e658dSJ. Bruce Fields new = conf; 1621136e658dSJ. Bruce Fields goto out_copy; 1622136e658dSJ. Bruce Fields } 16232dbb269dSJ. Bruce Fields /* case 5, client reboot */ 1624631fc9eaSJ. Bruce Fields expire_client: 16250733d213SAndy Adamson expire_client(conf); 16260733d213SAndy Adamson goto out_new; 16270733d213SAndy Adamson } 16286ddbbbfeSMike Sager 16292dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16300733d213SAndy Adamson status = nfserr_noent; 16310733d213SAndy Adamson goto out; 16320733d213SAndy Adamson } 16330733d213SAndy Adamson 1634e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16352dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16360733d213SAndy Adamson expire_client(unconf); 16370733d213SAndy Adamson 16382dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16390733d213SAndy Adamson out_new: 1640b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16410733d213SAndy Adamson if (new == NULL) { 16424731030dSJ. Bruce Fields status = nfserr_jukebox; 16430733d213SAndy Adamson goto out; 16440733d213SAndy Adamson } 16450733d213SAndy Adamson 16460733d213SAndy Adamson gen_clid(new); 16470733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16480733d213SAndy Adamson out_copy: 16490733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16500733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16510733d213SAndy Adamson 165238eb76a5SAndy Adamson exid->seqid = 1; 16530733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16540733d213SAndy Adamson 16550733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 165649557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16570733d213SAndy Adamson status = nfs_ok; 16580733d213SAndy Adamson 16590733d213SAndy Adamson out: 16600733d213SAndy Adamson nfs4_unlock_state(); 16610733d213SAndy Adamson return status; 1662069b6ad4SAndy Adamson } 1663069b6ad4SAndy Adamson 166457b7b43bSJ. Bruce Fields static __be32 166588e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1666b85d4c01SBenny Halevy { 166788e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 166888e588d5SAndy Adamson slot_seqid); 1669b85d4c01SBenny Halevy 1670b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 167188e588d5SAndy Adamson if (slot_inuse) { 167288e588d5SAndy Adamson if (seqid == slot_seqid) 1673b85d4c01SBenny Halevy return nfserr_jukebox; 1674b85d4c01SBenny Halevy else 1675b85d4c01SBenny Halevy return nfserr_seq_misordered; 1676b85d4c01SBenny Halevy } 1677f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 167888e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1679b85d4c01SBenny Halevy return nfs_ok; 168088e588d5SAndy Adamson if (seqid == slot_seqid) 1681b85d4c01SBenny Halevy return nfserr_replay_cache; 1682b85d4c01SBenny Halevy return nfserr_seq_misordered; 1683b85d4c01SBenny Halevy } 1684b85d4c01SBenny Halevy 168549557cc7SAndy Adamson /* 168649557cc7SAndy Adamson * Cache the create session result into the create session single DRC 168749557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 168849557cc7SAndy Adamson * Do this for solo or embedded create session operations. 168949557cc7SAndy Adamson */ 169049557cc7SAndy Adamson static void 169149557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 169257b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 169349557cc7SAndy Adamson { 169449557cc7SAndy Adamson slot->sl_status = nfserr; 169549557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 169649557cc7SAndy Adamson } 169749557cc7SAndy Adamson 169849557cc7SAndy Adamson static __be32 169949557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 170049557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 170149557cc7SAndy Adamson { 170249557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 170349557cc7SAndy Adamson return slot->sl_status; 170449557cc7SAndy Adamson } 170549557cc7SAndy Adamson 17061b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17071b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17081b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17091b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17101b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17111b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17121b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17131b74c25bSMi Jinlong 17141b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17151b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17161b74c25bSMi Jinlong 1 + /* status */ \ 17171b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17181b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17191b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17201b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17211b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17221b74c25bSMi Jinlong 172357b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17241b74c25bSMi Jinlong { 17251b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17261b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17271b74c25bSMi Jinlong } 17281b74c25bSMi Jinlong 1729069b6ad4SAndy Adamson __be32 1730069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1731069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1732069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1733069b6ad4SAndy Adamson { 1734363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1735ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1736ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 173749557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 173886c3e16cSJ. Bruce Fields bool confirm_me = false; 173957b7b43bSJ. Bruce Fields __be32 status = 0; 1740ec6b5d7bSAndy Adamson 1741a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1742a62573dcSMi Jinlong return nfserr_inval; 1743a62573dcSMi Jinlong 1744ec6b5d7bSAndy Adamson nfs4_lock_state(); 1745ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1746ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1747ec6b5d7bSAndy Adamson 1748ec6b5d7bSAndy Adamson if (conf) { 174949557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 175049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 175138eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1752ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 175349557cc7SAndy Adamson cs_slot->sl_seqid); 175438eb76a5SAndy Adamson /* Return the cached reply status */ 175549557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 175638eb76a5SAndy Adamson goto out; 175749557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1758ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1759ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1760ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 176149557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1762ec6b5d7bSAndy Adamson goto out; 1763ec6b5d7bSAndy Adamson } 1764ec6b5d7bSAndy Adamson } else if (unconf) { 1765ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1766363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1767ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1768ec6b5d7bSAndy Adamson goto out; 1769ec6b5d7bSAndy Adamson } 1770ec6b5d7bSAndy Adamson 177149557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 177249557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 177338eb76a5SAndy Adamson if (status) { 177438eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1775ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1776cd5b8144SJ. Bruce Fields goto out; 1777ec6b5d7bSAndy Adamson } 1778ec6b5d7bSAndy Adamson 177986c3e16cSJ. Bruce Fields confirm_me = true; 1780ec6b5d7bSAndy Adamson conf = unconf; 1781ec6b5d7bSAndy Adamson } else { 1782ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1783ec6b5d7bSAndy Adamson goto out; 1784ec6b5d7bSAndy Adamson } 1785ec6b5d7bSAndy Adamson 1786408b79bcSJ. Bruce Fields /* 17878323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17888323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17898323c3b2SJ. Bruce Fields */ 17908323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17918323c3b2SJ. Bruce Fields /* 1792408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1793408b79bcSJ. Bruce Fields */ 1794408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1795408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1796408b79bcSJ. Bruce Fields 17971b74c25bSMi Jinlong status = nfserr_toosmall; 17981b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17991b74c25bSMi Jinlong goto out; 18001b74c25bSMi Jinlong 1801ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1802ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1803ac7c46f2SJ. Bruce Fields if (!new) 1804ec6b5d7bSAndy Adamson goto out; 1805ac7c46f2SJ. Bruce Fields status = nfs_ok; 1806ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1807ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 180812050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 180912050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 181086c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 181149557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1812ec6b5d7bSAndy Adamson 181349557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 181449557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 181586c3e16cSJ. Bruce Fields if (confirm_me) 181686c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1817ec6b5d7bSAndy Adamson out: 1818ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1819ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1820ec6b5d7bSAndy Adamson return status; 1821069b6ad4SAndy Adamson } 1822069b6ad4SAndy Adamson 182357716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 182457716355SJ. Bruce Fields { 182557716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 182657716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 182757716355SJ. Bruce Fields 182857716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 182957716355SJ. Bruce Fields } 183057716355SJ. Bruce Fields 18311d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18321d1bc8f2SJ. Bruce Fields { 18331d1bc8f2SJ. Bruce Fields switch (*dir) { 18341d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18351d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18361d1bc8f2SJ. Bruce Fields return nfs_ok; 18371d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18381d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18391d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18401d1bc8f2SJ. Bruce Fields return nfs_ok; 18411d1bc8f2SJ. Bruce Fields }; 18421d1bc8f2SJ. Bruce Fields return nfserr_inval; 18431d1bc8f2SJ. Bruce Fields } 18441d1bc8f2SJ. Bruce Fields 18451d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18461d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18471d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18481d1bc8f2SJ. Bruce Fields { 18491d1bc8f2SJ. Bruce Fields __be32 status; 18501d1bc8f2SJ. Bruce Fields 18511d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18521d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18531d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18541d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18551d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18561d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18571d1bc8f2SJ. Bruce Fields if (cstate->session) { 18581d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18591d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18601d1bc8f2SJ. Bruce Fields } 18611d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18621d1bc8f2SJ. Bruce Fields if (!cstate->session) 18631d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18641d1bc8f2SJ. Bruce Fields 18651d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18661db2b9ddSBryan Schumaker if (!status) 18671d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18681db2b9ddSBryan Schumaker return status; 18691d1bc8f2SJ. Bruce Fields } 18701d1bc8f2SJ. Bruce Fields 18715d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18725d4cec2fSJ. Bruce Fields { 18735d4cec2fSJ. Bruce Fields if (!session) 18745d4cec2fSJ. Bruce Fields return 0; 18755d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18765d4cec2fSJ. Bruce Fields } 18775d4cec2fSJ. Bruce Fields 1878069b6ad4SAndy Adamson __be32 1879069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1880069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1881069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1882069b6ad4SAndy Adamson { 1883e10e0cfcSBenny Halevy struct nfsd4_session *ses; 188457b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1885e10e0cfcSBenny Halevy 1886e10e0cfcSBenny Halevy /* Notes: 1887e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1888e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1889e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1890e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1891e10e0cfcSBenny Halevy */ 1892e10e0cfcSBenny Halevy 18935d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 189457716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 189557716355SJ. Bruce Fields return nfserr_not_only_op; 189657716355SJ. Bruce Fields } 1897e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18989089f1b4SBenny Halevy spin_lock(&client_lock); 1899e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1900e10e0cfcSBenny Halevy if (!ses) { 19019089f1b4SBenny Halevy spin_unlock(&client_lock); 1902e10e0cfcSBenny Halevy goto out; 1903e10e0cfcSBenny Halevy } 1904e10e0cfcSBenny Halevy 1905e10e0cfcSBenny Halevy unhash_session(ses); 19069089f1b4SBenny Halevy spin_unlock(&client_lock); 1907e10e0cfcSBenny Halevy 1908ab707e15SBenny Halevy nfs4_lock_state(); 190984f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1910ab707e15SBenny Halevy nfs4_unlock_state(); 191119cf5c02SJ. Bruce Fields 1912508dc6e1SBenny Halevy spin_lock(&client_lock); 191319cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1914508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1915508dc6e1SBenny Halevy spin_unlock(&client_lock); 1916e10e0cfcSBenny Halevy status = nfs_ok; 1917e10e0cfcSBenny Halevy out: 1918e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1919e10e0cfcSBenny Halevy return status; 1920069b6ad4SAndy Adamson } 1921069b6ad4SAndy Adamson 1922a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1923328ead28SJ. Bruce Fields { 1924328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1925328ead28SJ. Bruce Fields 1926328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1927a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1928328ead28SJ. Bruce Fields return c; 1929328ead28SJ. Bruce Fields } 1930328ead28SJ. Bruce Fields } 1931328ead28SJ. Bruce Fields return NULL; 1932328ead28SJ. Bruce Fields } 1933328ead28SJ. Bruce Fields 1934a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1935328ead28SJ. Bruce Fields { 1936328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1937a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 193821b75b01SJ. Bruce Fields int ret; 1939328ead28SJ. Bruce Fields 1940328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1941a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1942328ead28SJ. Bruce Fields if (c) { 1943328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1944328ead28SJ. Bruce Fields free_conn(new); 1945328ead28SJ. Bruce Fields return; 1946328ead28SJ. Bruce Fields } 1947328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1948328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 194921b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 195021b75b01SJ. Bruce Fields if (ret) 195121b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 195221b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1953328ead28SJ. Bruce Fields return; 1954328ead28SJ. Bruce Fields } 1955328ead28SJ. Bruce Fields 1956868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1957868b89c3SMi Jinlong { 1958868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1959868b89c3SMi Jinlong 1960868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1961868b89c3SMi Jinlong } 1962868b89c3SMi Jinlong 1963ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1964ae82a8d0SMi Jinlong struct nfsd4_session *session) 1965ae82a8d0SMi Jinlong { 1966ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1967ae82a8d0SMi Jinlong 1968ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1969ae82a8d0SMi Jinlong } 1970ae82a8d0SMi Jinlong 1971069b6ad4SAndy Adamson __be32 1972b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1973069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1974069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1975069b6ad4SAndy Adamson { 1976f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1977b85d4c01SBenny Halevy struct nfsd4_session *session; 1978b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1979a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 198057b7b43bSJ. Bruce Fields __be32 status; 1981b85d4c01SBenny Halevy 1982f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1983f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1984f9bb94c4SAndy Adamson 1985a663bdd8SJ. Bruce Fields /* 1986a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1987a663bdd8SJ. Bruce Fields * below. 1988a663bdd8SJ. Bruce Fields */ 1989a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1990a663bdd8SJ. Bruce Fields if (!conn) 1991a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1992a663bdd8SJ. Bruce Fields 19939089f1b4SBenny Halevy spin_lock(&client_lock); 1994b85d4c01SBenny Halevy status = nfserr_badsession; 1995b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1996b85d4c01SBenny Halevy if (!session) 1997b85d4c01SBenny Halevy goto out; 1998b85d4c01SBenny Halevy 1999868b89c3SMi Jinlong status = nfserr_too_many_ops; 2000868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2001868b89c3SMi Jinlong goto out; 2002868b89c3SMi Jinlong 2003ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2004ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2005ae82a8d0SMi Jinlong goto out; 2006ae82a8d0SMi Jinlong 2007b85d4c01SBenny Halevy status = nfserr_badslot; 20086c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2009b85d4c01SBenny Halevy goto out; 2010b85d4c01SBenny Halevy 2011557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2012b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2013b85d4c01SBenny Halevy 2014a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2015a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2016a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2017a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2018a8dfdaebSAndy Adamson 201973e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 202073e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2021b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2022bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2023bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2024bf5c43c8SJ. Bruce Fields goto out; 2025b85d4c01SBenny Halevy cstate->slot = slot; 2026b85d4c01SBenny Halevy cstate->session = session; 2027da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2028557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2029bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2030da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2031aaf84eb9SBenny Halevy goto out; 2032b85d4c01SBenny Halevy } 2033b85d4c01SBenny Halevy if (status) 2034b85d4c01SBenny Halevy goto out; 2035b85d4c01SBenny Halevy 2036a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2037a663bdd8SJ. Bruce Fields conn = NULL; 2038328ead28SJ. Bruce Fields 2039b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2040b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2041bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 204273e79482SJ. Bruce Fields if (seq->cachethis) 204373e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2044bf5c43c8SJ. Bruce Fields else 2045bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2046b85d4c01SBenny Halevy 2047b85d4c01SBenny Halevy cstate->slot = slot; 2048b85d4c01SBenny Halevy cstate->session = session; 2049b85d4c01SBenny Halevy 2050b85d4c01SBenny Halevy out: 205126c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2052aaf84eb9SBenny Halevy if (cstate->session) { 20530d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20540d7bb719SJ. Bruce Fields 205536acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20560d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20575423732aSBenny Halevy switch (clp->cl_cb_state) { 20585423732aSBenny Halevy case NFSD4_CB_DOWN: 2059fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20605423732aSBenny Halevy break; 20615423732aSBenny Halevy case NFSD4_CB_FAULT: 2062fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20635423732aSBenny Halevy break; 2064fc0c3dd1SBenny Halevy default: 2065fc0c3dd1SBenny Halevy seq->status_flags = 0; 20665423732aSBenny Halevy } 2067aaf84eb9SBenny Halevy } 2068a663bdd8SJ. Bruce Fields kfree(conn); 206936acb66bSBenny Halevy spin_unlock(&client_lock); 2070b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2071b85d4c01SBenny Halevy return status; 2072069b6ad4SAndy Adamson } 2073069b6ad4SAndy Adamson 2074345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 2075345c2842SMi Jinlong { 2076345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 2077345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 2078345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 2079345c2842SMi Jinlong } 2080345c2842SMi Jinlong 2081345c2842SMi Jinlong __be32 2082345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2083345c2842SMi Jinlong { 2084345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 208557b7b43bSJ. Bruce Fields __be32 status = 0; 2086345c2842SMi Jinlong 2087345c2842SMi Jinlong nfs4_lock_state(); 2088345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2089345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2090345c2842SMi Jinlong 2091345c2842SMi Jinlong if (conf) { 2092345c2842SMi Jinlong clp = conf; 2093345c2842SMi Jinlong 2094345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 2095345c2842SMi Jinlong status = nfserr_clientid_busy; 2096345c2842SMi Jinlong goto out; 2097345c2842SMi Jinlong } 2098345c2842SMi Jinlong 2099345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2100345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2101345c2842SMi Jinlong status = nfserr_clientid_busy; 2102345c2842SMi Jinlong goto out; 2103345c2842SMi Jinlong } 2104345c2842SMi Jinlong } else if (unconf) 2105345c2842SMi Jinlong clp = unconf; 2106345c2842SMi Jinlong else { 2107345c2842SMi Jinlong status = nfserr_stale_clientid; 2108345c2842SMi Jinlong goto out; 2109345c2842SMi Jinlong } 2110345c2842SMi Jinlong 2111345c2842SMi Jinlong expire_client(clp); 2112345c2842SMi Jinlong out: 2113345c2842SMi Jinlong nfs4_unlock_state(); 2114345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2115345c2842SMi Jinlong return status; 2116345c2842SMi Jinlong } 2117345c2842SMi Jinlong 2118069b6ad4SAndy Adamson __be32 21194dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21204dc6ec00SJ. Bruce Fields { 212157b7b43bSJ. Bruce Fields __be32 status = 0; 2122bcecf1ccSMi Jinlong 21234dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21244dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21254dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21264dc6ec00SJ. Bruce Fields /* 21274dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21284dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21294dc6ec00SJ. Bruce Fields */ 21304dc6ec00SJ. Bruce Fields return nfs_ok; 21314dc6ec00SJ. Bruce Fields } 2132bcecf1ccSMi Jinlong 21334dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2134bcecf1ccSMi Jinlong status = nfserr_complete_already; 2135a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2136a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2137bcecf1ccSMi Jinlong goto out; 2138bcecf1ccSMi Jinlong 2139bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2140bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21414dc6ec00SJ. Bruce Fields /* 21424dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21434dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21444dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21454dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21464dc6ec00SJ. Bruce Fields * client. 21474dc6ec00SJ. Bruce Fields */ 2148bcecf1ccSMi Jinlong goto out; 2149bcecf1ccSMi Jinlong 2150bcecf1ccSMi Jinlong status = nfs_ok; 21512a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2152bcecf1ccSMi Jinlong out: 21534dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2154bcecf1ccSMi Jinlong return status; 21554dc6ec00SJ. Bruce Fields } 21564dc6ec00SJ. Bruce Fields 21574dc6ec00SJ. Bruce Fields __be32 2158b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2159b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21601da177e4SLinus Torvalds { 2161a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21621da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21631da177e4SLinus Torvalds unsigned int strhashval; 216428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2165b37ad28bSAl Viro __be32 status; 2166a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21671da177e4SLinus Torvalds 2168a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2169a55370a3SNeilBrown if (status) 217073aea4ecSNeil Brown return status; 2171a55370a3SNeilBrown 2172a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21731da177e4SLinus Torvalds 217463db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 21751da177e4SLinus Torvalds nfs4_lock_state(); 2176e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 217728ce6054SNeilBrown if (conf) { 217863db4632SJ. Bruce Fields /* case 0: */ 21791da177e4SLinus Torvalds status = nfserr_clid_inuse; 2180e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2181e203d506SJ. Bruce Fields goto out; 2182026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2183363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2184363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2185363168b4SJeff Layton sizeof(addr_str)); 2186026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2187363168b4SJeff Layton "at %s\n", addr_str); 21881da177e4SLinus Torvalds goto out; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds } 2191e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21921da177e4SLinus Torvalds if (unconf) 21931da177e4SLinus Torvalds expire_client(unconf); 21948f930711SJ. Bruce Fields status = nfserr_jukebox; 2195b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2196a55370a3SNeilBrown if (new == NULL) 21971da177e4SLinus Torvalds goto out; 21988f930711SJ. Bruce Fields if (!conf) { 21998f930711SJ. Bruce Fields /* case 4: placed first, because it's the normal case */ 22001da177e4SLinus Torvalds gen_clid(new); 2201599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 220263db4632SJ. Bruce Fields /* case 1: probable callback update */ 22031da177e4SLinus Torvalds copy_clid(new, conf); 2204ad72aae5SJ. Bruce Fields } else { /* conf && !same_verf(): */ 2205ad72aae5SJ. Bruce Fields /* cases 2, 3: probable client reboot: */ 22061da177e4SLinus Torvalds gen_clid(new); 22071da177e4SLinus Torvalds } 22088323c3b2SJ. Bruce Fields /* 22098323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22108323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22118323c3b2SJ. Bruce Fields */ 22128323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22136f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2214c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22151da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22161da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22171da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22181da177e4SLinus Torvalds status = nfs_ok; 22191da177e4SLinus Torvalds out: 22201da177e4SLinus Torvalds nfs4_unlock_state(); 22211da177e4SLinus Torvalds return status; 22221da177e4SLinus Torvalds } 22231da177e4SLinus Torvalds 22241da177e4SLinus Torvalds 2225b37ad28bSAl Viro __be32 2226b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2227b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2228b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22291da177e4SLinus Torvalds { 223021ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22311da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22321da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2233b37ad28bSAl Viro __be32 status; 22341da177e4SLinus Torvalds 22351da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22361da177e4SLinus Torvalds return nfserr_stale_clientid; 22371da177e4SLinus Torvalds /* 22381da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 22391da177e4SLinus Torvalds * We get here on a DRC miss. 22401da177e4SLinus Torvalds */ 22411da177e4SLinus Torvalds 22421da177e4SLinus Torvalds nfs4_lock_state(); 224321ab45a4SNeilBrown 224421ab45a4SNeilBrown conf = find_confirmed_client(clid); 224521ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 224621ab45a4SNeilBrown 224763db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 2248f07ea10dSChuck Lever status = nfserr_clid_inuse; 2249366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 225063db4632SJ. Bruce Fields /* case 1: callback update */ 2251599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22521da177e4SLinus Torvalds status = nfserr_clid_inuse; 22531da177e4SLinus Torvalds else { 22545a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22555a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22561a69c179SNeilBrown expire_client(unconf); 22571da177e4SLinus Torvalds status = nfs_ok; 22581da177e4SLinus Torvalds } 2259f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 226063db4632SJ. Bruce Fields /* case 2: probable retransmit: */ 2261599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22621da177e4SLinus Torvalds status = nfserr_clid_inuse; 226321ab45a4SNeilBrown else 22641da177e4SLinus Torvalds status = nfs_ok; 22657c79f737SNeilBrown } else if (!conf && unconf 2266599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 226763db4632SJ. Bruce Fields /* case 3: normal case; new or rebooted client */ 2268599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22691da177e4SLinus Torvalds status = nfserr_clid_inuse; 22701da177e4SLinus Torvalds } else { 22711a69c179SNeilBrown unsigned int hash = 22721a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22731a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2274e203d506SJ. Bruce Fields hash); 22751a69c179SNeilBrown if (conf) { 22762a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22771a69c179SNeilBrown expire_client(conf); 22781a69c179SNeilBrown } 22791da177e4SLinus Torvalds move_to_confirmed(unconf); 228021ab45a4SNeilBrown conf = unconf; 22815a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22821a69c179SNeilBrown status = nfs_ok; 22831da177e4SLinus Torvalds } 2284e98479b8SJ. Bruce Fields } else if ((!conf || !same_verf(&conf->cl_confirm, &confirm)) 2285e98479b8SJ. Bruce Fields && (!unconf || !same_verf(&unconf->cl_confirm, &confirm))) { 228663db4632SJ. Bruce Fields /* case 4: client hasn't noticed we rebooted yet? */ 22871da177e4SLinus Torvalds status = nfserr_stale_clientid; 228808e8987cSNeilBrown } 2289f07ea10dSChuck Lever 22901da177e4SLinus Torvalds nfs4_unlock_state(); 22911da177e4SLinus Torvalds return status; 22921da177e4SLinus Torvalds } 22931da177e4SLinus Torvalds 229432513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22951da177e4SLinus Torvalds { 229632513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 229732513b40SJ. Bruce Fields } 229832513b40SJ. Bruce Fields 229932513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 230032513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 230132513b40SJ. Bruce Fields { 23021da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23031da177e4SLinus Torvalds 23048b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23051da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23068beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23078beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23081da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 230947f9940cSMeelap Shah fp->fi_had_conflict = false; 2310acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2311f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2312f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 231347cee541SPavel Emelyanov spin_lock(&recall_lock); 231447cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 231547cee541SPavel Emelyanov spin_unlock(&recall_lock); 23161da177e4SLinus Torvalds } 23171da177e4SLinus Torvalds 23181da177e4SLinus Torvalds static void 2319e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2320e60d4398SNeilBrown { 2321e60d4398SNeilBrown if (*slab == NULL) 2322e60d4398SNeilBrown return; 23231a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2324e60d4398SNeilBrown *slab = NULL; 2325e60d4398SNeilBrown } 2326e60d4398SNeilBrown 2327e8ff2a84SJ. Bruce Fields void 2328e60d4398SNeilBrown nfsd4_free_slabs(void) 2329e60d4398SNeilBrown { 2330fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2331fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2332e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23335ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23345b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2335e60d4398SNeilBrown } 23361da177e4SLinus Torvalds 233772083396SBryan Schumaker int 23381da177e4SLinus Torvalds nfsd4_init_slabs(void) 23391da177e4SLinus Torvalds { 2340fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2341fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2342fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2343fe0750e5SJ. Bruce Fields goto out_nomem; 2344fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2345fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2346fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2347e60d4398SNeilBrown goto out_nomem; 2348e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 234920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2350e60d4398SNeilBrown if (file_slab == NULL) 2351e60d4398SNeilBrown goto out_nomem; 23525ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2353dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23545ac049acSNeilBrown if (stateid_slab == NULL) 23555ac049acSNeilBrown goto out_nomem; 23565b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 235720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23585b2d21c1SNeilBrown if (deleg_slab == NULL) 23595b2d21c1SNeilBrown goto out_nomem; 2360e60d4398SNeilBrown return 0; 2361e60d4398SNeilBrown out_nomem: 2362e60d4398SNeilBrown nfsd4_free_slabs(); 23631da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23641da177e4SLinus Torvalds return -ENOMEM; 23651da177e4SLinus Torvalds } 23661da177e4SLinus Torvalds 2367fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23681da177e4SLinus Torvalds { 2369fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2370fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2371fe0750e5SJ. Bruce Fields } 2372fe0750e5SJ. Bruce Fields 2373fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2374fe0750e5SJ. Bruce Fields { 2375fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2376fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23771da177e4SLinus Torvalds } 23781da177e4SLinus Torvalds 2379ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2380ff194bd9SJ. Bruce Fields { 2381ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2382ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2383ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2384ff194bd9SJ. Bruce Fields } 2385ff194bd9SJ. Bruce Fields 2386fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23871da177e4SLinus Torvalds { 23881da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23891da177e4SLinus Torvalds 2390fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2391ff194bd9SJ. Bruce Fields if (!sop) 2392ff194bd9SJ. Bruce Fields return NULL; 2393ff194bd9SJ. Bruce Fields 2394ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2395ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2396fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2397ff194bd9SJ. Bruce Fields return NULL; 2398ff194bd9SJ. Bruce Fields } 23991da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2400ff194bd9SJ. Bruce Fields 2401ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2402ff194bd9SJ. Bruce Fields sop->so_client = clp; 2403ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24041da177e4SLinus Torvalds return sop; 24051da177e4SLinus Torvalds } 2406ff194bd9SJ. Bruce Fields 2407fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2408ff194bd9SJ. Bruce Fields { 240916bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2410fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24111da177e4SLinus Torvalds } 24121da177e4SLinus Torvalds 2413fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24141da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2415fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24161da177e4SLinus Torvalds 2417fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2418fe0750e5SJ. Bruce Fields if (!oo) 24191da177e4SLinus Torvalds return NULL; 2420fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2421fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2422d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2423fe0750e5SJ. Bruce Fields oo->oo_time = 0; 242438c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2425fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2426fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2427fe0750e5SJ. Bruce Fields return oo; 24281da177e4SLinus Torvalds } 24291da177e4SLinus Torvalds 2430996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2431fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2432d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24331da177e4SLinus Torvalds 2434996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2435ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2436fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24378beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2438fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 243913cd2184SNeilBrown get_nfs4_file(fp); 24401da177e4SLinus Torvalds stp->st_file = fp; 24411da177e4SLinus Torvalds stp->st_access_bmap = 0; 24421da177e4SLinus Torvalds stp->st_deny_bmap = 0; 244382c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2444ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24454c4cd222SNeilBrown stp->st_openstp = NULL; 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 24481da177e4SLinus Torvalds static void 2449fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24501da177e4SLinus Torvalds { 2451fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24521da177e4SLinus Torvalds 2453fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2454fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds 24571da177e4SLinus Torvalds static int 2458599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2459599e0a22SJ. Bruce Fields clientid_t *clid) 2460599e0a22SJ. Bruce Fields { 2461599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2462599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2463599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24641da177e4SLinus Torvalds } 24651da177e4SLinus Torvalds 2466fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24671da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24681da177e4SLinus Torvalds { 2469a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2470a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24711da177e4SLinus Torvalds 247216bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 247316bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 247416bfdaafSJ. Bruce Fields continue; 2475a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2476a50d2ad1SJ. Bruce Fields oo = openowner(so); 2477a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2478a50d2ad1SJ. Bruce Fields return oo; 2479a50d2ad1SJ. Bruce Fields } 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds return NULL; 24821da177e4SLinus Torvalds } 24831da177e4SLinus Torvalds 24841da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24851da177e4SLinus Torvalds static struct nfs4_file * 24861da177e4SLinus Torvalds find_file(struct inode *ino) 24871da177e4SLinus Torvalds { 24881da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24891da177e4SLinus Torvalds struct nfs4_file *fp; 24901da177e4SLinus Torvalds 24918b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24921da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 249313cd2184SNeilBrown if (fp->fi_inode == ino) { 249413cd2184SNeilBrown get_nfs4_file(fp); 24958b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24961da177e4SLinus Torvalds return fp; 24971da177e4SLinus Torvalds } 249813cd2184SNeilBrown } 24998b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25001da177e4SLinus Torvalds return NULL; 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds 25034f83aa30SJ. Bruce Fields /* 25041da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25051da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25061da177e4SLinus Torvalds */ 2507b37ad28bSAl Viro static __be32 25081da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25091da177e4SLinus Torvalds { 25101da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25111da177e4SLinus Torvalds struct nfs4_file *fp; 2512dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2513b37ad28bSAl Viro __be32 ret; 25141da177e4SLinus Torvalds 25151da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25161da177e4SLinus Torvalds 25171da177e4SLinus Torvalds fp = find_file(ino); 251813cd2184SNeilBrown if (!fp) 251913cd2184SNeilBrown return nfs_ok; 2520b700949bSNeilBrown ret = nfserr_locked; 25211da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25228beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2523ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2524ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 252513cd2184SNeilBrown goto out; 25261da177e4SLinus Torvalds } 252713cd2184SNeilBrown ret = nfs_ok; 252813cd2184SNeilBrown out: 252913cd2184SNeilBrown put_nfs4_file(fp); 253013cd2184SNeilBrown return ret; 25311da177e4SLinus Torvalds } 25321da177e4SLinus Torvalds 25336b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25341da177e4SLinus Torvalds { 25351da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25361da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25371da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25381da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25391da177e4SLinus Torvalds * it's safe to take a reference: */ 25401da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25431da177e4SLinus Torvalds 2544460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25451da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25461da177e4SLinus Torvalds 25476b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25486b57d9c8SJ. Bruce Fields } 25496b57d9c8SJ. Bruce Fields 2550acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25516b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25526b57d9c8SJ. Bruce Fields { 2553acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2554acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25556b57d9c8SJ. Bruce Fields 2556acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2557acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2558acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25590272e1fdSJ. Bruce Fields /* 25600272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2561acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25626b57d9c8SJ. Bruce Fields * in time: 25630272e1fdSJ. Bruce Fields */ 25640272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25651da177e4SLinus Torvalds 25665d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2567acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2568acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25695d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25705d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25711da177e4SLinus Torvalds } 25721da177e4SLinus Torvalds 25731da177e4SLinus Torvalds static 25741da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25751da177e4SLinus Torvalds { 25761da177e4SLinus Torvalds if (arg & F_UNLCK) 25771da177e4SLinus Torvalds return lease_modify(onlist, arg); 25781da177e4SLinus Torvalds else 25791da177e4SLinus Torvalds return -EAGAIN; 25801da177e4SLinus Torvalds } 25811da177e4SLinus Torvalds 25827b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25838fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25848fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25851da177e4SLinus Torvalds }; 25861da177e4SLinus Torvalds 25877a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25887a8711c9SJ. Bruce Fields { 25897a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25907a8711c9SJ. Bruce Fields return nfs_ok; 25917a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25927a8711c9SJ. Bruce Fields return nfserr_replay_me; 25937a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25947a8711c9SJ. Bruce Fields return nfs_ok; 25957a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25967a8711c9SJ. Bruce Fields } 25971da177e4SLinus Torvalds 2598b37ad28bSAl Viro __be32 25996668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26006668958fSAndy Adamson struct nfsd4_open *open) 26011da177e4SLinus Torvalds { 26021da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26031da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26041da177e4SLinus Torvalds unsigned int strhashval; 2605fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26064cdc951bSJ. Bruce Fields __be32 status; 26071da177e4SLinus Torvalds 26081da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 26091da177e4SLinus Torvalds return nfserr_stale_clientid; 261032513b40SJ. Bruce Fields /* 261132513b40SJ. Bruce Fields * In case we need it later, after we've already created the 261232513b40SJ. Bruce Fields * file and don't want to risk a further failure: 261332513b40SJ. Bruce Fields */ 261432513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 261532513b40SJ. Bruce Fields if (open->op_file == NULL) 261632513b40SJ. Bruce Fields return nfserr_jukebox; 26171da177e4SLinus Torvalds 261816bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2619fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2620fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2621fe0750e5SJ. Bruce Fields if (!oo) { 26220f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26230f442aa2SJ. Bruce Fields if (clp == NULL) 26240f442aa2SJ. Bruce Fields return nfserr_expired; 2625bcf130f9SJ. Bruce Fields goto new_owner; 26260f442aa2SJ. Bruce Fields } 2627dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26280f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2629fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2630fe0750e5SJ. Bruce Fields release_openowner(oo); 2631fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2632bcf130f9SJ. Bruce Fields goto new_owner; 26330f442aa2SJ. Bruce Fields } 26344cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26354cdc951bSJ. Bruce Fields if (status) 26364cdc951bSJ. Bruce Fields return status; 26374cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26384cdc951bSJ. Bruce Fields goto alloc_stateid; 2639bcf130f9SJ. Bruce Fields new_owner: 2640fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2641fe0750e5SJ. Bruce Fields if (oo == NULL) 26423e772463SJ. Bruce Fields return nfserr_jukebox; 2643fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26444cdc951bSJ. Bruce Fields alloc_stateid: 26454cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26464cdc951bSJ. Bruce Fields if (!open->op_stp) 26474cdc951bSJ. Bruce Fields return nfserr_jukebox; 26480f442aa2SJ. Bruce Fields return nfs_ok; 26491da177e4SLinus Torvalds } 26501da177e4SLinus Torvalds 2651b37ad28bSAl Viro static inline __be32 26524a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26534a6e43e6SNeilBrown { 26544a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26554a6e43e6SNeilBrown return nfserr_openmode; 26564a6e43e6SNeilBrown else 26574a6e43e6SNeilBrown return nfs_ok; 26584a6e43e6SNeilBrown } 26594a6e43e6SNeilBrown 2660c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 266124a0111eSJ. Bruce Fields { 266224a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 266324a0111eSJ. Bruce Fields } 266424a0111eSJ. Bruce Fields 266538c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2666f459e453SJ. Bruce Fields { 2667f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2668f459e453SJ. Bruce Fields 266938c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2670f459e453SJ. Bruce Fields if (!ret) 2671f459e453SJ. Bruce Fields return NULL; 2672f459e453SJ. Bruce Fields return delegstateid(ret); 2673f459e453SJ. Bruce Fields } 2674f459e453SJ. Bruce Fields 26758b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26768b289b2cSJ. Bruce Fields { 26778b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26788b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26798b289b2cSJ. Bruce Fields } 26808b289b2cSJ. Bruce Fields 2681b37ad28bSAl Viro static __be32 268238c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2683567d9829SNeilBrown struct nfs4_delegation **dp) 2684567d9829SNeilBrown { 2685567d9829SNeilBrown int flags; 2686b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2687567d9829SNeilBrown 268838c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2689567d9829SNeilBrown if (*dp == NULL) 2690c44c5eebSNeilBrown goto out; 269124a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2692567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2693567d9829SNeilBrown if (status) 2694567d9829SNeilBrown *dp = NULL; 2695c44c5eebSNeilBrown out: 26968b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2697c44c5eebSNeilBrown return nfs_ok; 2698c44c5eebSNeilBrown if (status) 2699c44c5eebSNeilBrown return status; 2700dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2701c44c5eebSNeilBrown return nfs_ok; 2702567d9829SNeilBrown } 2703567d9829SNeilBrown 2704b37ad28bSAl Viro static __be32 2705dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27061da177e4SLinus Torvalds { 2707dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2708fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27091da177e4SLinus Torvalds 27108beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27111da177e4SLinus Torvalds /* ignore lock owners */ 27121da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27131da177e4SLinus Torvalds continue; 27141da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2715fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27161da177e4SLinus Torvalds *stpp = local; 27171da177e4SLinus Torvalds /* check for conflicting share reservations */ 27181da177e4SLinus Torvalds if (!test_share(local, open)) 271977eaae8dSJ. Bruce Fields return nfserr_share_denied; 27201da177e4SLinus Torvalds } 272177eaae8dSJ. Bruce Fields return nfs_ok; 27221da177e4SLinus Torvalds } 27231da177e4SLinus Torvalds 2724996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2725996e0938SJ. Bruce Fields { 2726996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27275ac049acSNeilBrown } 27285ac049acSNeilBrown 272921fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 273021fb4016SJ. Bruce Fields { 273121fb4016SJ. Bruce Fields int flags = 0; 273221fb4016SJ. Bruce Fields 273321fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 273421fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 273521fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 273621fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 273721fb4016SJ. Bruce Fields return flags; 273821fb4016SJ. Bruce Fields } 273921fb4016SJ. Bruce Fields 27400c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27410c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2742f9d7562fSJ. Bruce Fields { 2743f9d7562fSJ. Bruce Fields __be32 status; 27440c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27450c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27460c12eaffSCasey Bodley 2747f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2748f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2749f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2750f9d7562fSJ. Bruce Fields if (status) 2751f9d7562fSJ. Bruce Fields return status; 2752f9d7562fSJ. Bruce Fields } 2753f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2754f9d7562fSJ. Bruce Fields 2755f9d7562fSJ. Bruce Fields return nfs_ok; 2756f9d7562fSJ. Bruce Fields } 2757f9d7562fSJ. Bruce Fields 2758b37ad28bSAl Viro static inline __be32 27591da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27601da177e4SLinus Torvalds struct nfsd4_open *open) 27611da177e4SLinus Torvalds { 27621da177e4SLinus Torvalds struct iattr iattr = { 27631da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27641da177e4SLinus Torvalds .ia_size = 0, 27651da177e4SLinus Torvalds }; 27661da177e4SLinus Torvalds if (!open->op_truncate) 27671da177e4SLinus Torvalds return 0; 27681da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27699246585aSAl Viro return nfserr_inval; 27701da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27711da177e4SLinus Torvalds } 27721da177e4SLinus Torvalds 2773b37ad28bSAl Viro static __be32 2774dcef0413SJ. 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) 27751da177e4SLinus Torvalds { 2776b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27777d947842SJ. Bruce Fields bool new_access; 2778b37ad28bSAl Viro __be32 status; 27791da177e4SLinus Torvalds 278082c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2781f9d7562fSJ. Bruce Fields if (new_access) { 27820c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2783f9d7562fSJ. Bruce Fields if (status) 2784f9d7562fSJ. Bruce Fields return status; 27856c26d08fSJ. Bruce Fields } 27861da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27871da177e4SLinus Torvalds if (status) { 2788f9d7562fSJ. Bruce Fields if (new_access) { 2789f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2790f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2791f9d7562fSJ. Bruce Fields } 27921da177e4SLinus Torvalds return status; 27931da177e4SLinus Torvalds } 27941da177e4SLinus Torvalds /* remember the open */ 279582c5ff1bSJeff Layton set_access(op_share_access, stp); 2796ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 27971da177e4SLinus Torvalds 27981da177e4SLinus Torvalds return nfs_ok; 27991da177e4SLinus Torvalds } 28001da177e4SLinus Torvalds 28011da177e4SLinus Torvalds 28021da177e4SLinus Torvalds static void 28031255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28041da177e4SLinus Torvalds { 2805dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28061da177e4SLinus Torvalds } 28071da177e4SLinus Torvalds 280814a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 280914a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 281014a24e99SJ. Bruce Fields { 281114a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 281214a24e99SJ. Bruce Fields return true; 281314a24e99SJ. Bruce Fields /* 281414a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 281514a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 281614a24e99SJ. Bruce Fields * until we hear otherwise: 281714a24e99SJ. Bruce Fields */ 281814a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 281914a24e99SJ. Bruce Fields } 282014a24e99SJ. Bruce Fields 282122d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 282222d38c4cSJ. Bruce Fields { 282322d38c4cSJ. Bruce Fields struct file_lock *fl; 282422d38c4cSJ. Bruce Fields 282522d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 282622d38c4cSJ. Bruce Fields if (!fl) 282722d38c4cSJ. Bruce Fields return NULL; 282822d38c4cSJ. Bruce Fields locks_init_lock(fl); 282922d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 283022d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 283122d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 283222d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2833acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 283422d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 283522d38c4cSJ. Bruce Fields return fl; 283622d38c4cSJ. Bruce Fields } 283722d38c4cSJ. Bruce Fields 2838edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2839edab9782SJ. Bruce Fields { 2840acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2841edab9782SJ. Bruce Fields struct file_lock *fl; 2842edab9782SJ. Bruce Fields int status; 2843edab9782SJ. Bruce Fields 2844edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2845edab9782SJ. Bruce Fields if (!fl) 2846edab9782SJ. Bruce Fields return -ENOMEM; 2847acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28482a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2849acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2850edab9782SJ. Bruce Fields if (status) { 2851acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2852edab9782SJ. Bruce Fields locks_free_lock(fl); 2853edab9782SJ. Bruce Fields return -ENOMEM; 2854edab9782SJ. Bruce Fields } 2855acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2856acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2857acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2858acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2859acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2860acfdf5c3SJ. Bruce Fields return 0; 2861acfdf5c3SJ. Bruce Fields } 2862acfdf5c3SJ. Bruce Fields 2863acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2864acfdf5c3SJ. Bruce Fields { 2865acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2866acfdf5c3SJ. Bruce Fields 2867acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2868acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2869acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2870acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2871acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2872acfdf5c3SJ. Bruce Fields return -EAGAIN; 2873acfdf5c3SJ. Bruce Fields } 2874acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2875acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2876acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28772a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2878edab9782SJ. Bruce Fields return 0; 2879edab9782SJ. Bruce Fields } 2880edab9782SJ. Bruce Fields 28814aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28824aa8913cSBenny Halevy { 28834aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28844aa8913cSBenny Halevy if (status == -EAGAIN) 28854aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28864aa8913cSBenny Halevy else { 28874aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28884aa8913cSBenny Halevy switch (open->op_deleg_want) { 28894aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28904aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28914aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28924aa8913cSBenny Halevy break; 28934aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28944aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 28954aa8913cSBenny Halevy break; 28964aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 28974aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 28984aa8913cSBenny Halevy } 28994aa8913cSBenny Halevy } 29004aa8913cSBenny Halevy } 29014aa8913cSBenny Halevy 29021da177e4SLinus Torvalds /* 29031da177e4SLinus Torvalds * Attempt to hand out a delegation. 29041da177e4SLinus Torvalds */ 29051da177e4SLinus Torvalds static void 2906dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29071da177e4SLinus Torvalds { 29081da177e4SLinus Torvalds struct nfs4_delegation *dp; 2909fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 291014a24e99SJ. Bruce Fields int cb_up; 2911d24433cdSBenny Halevy int status = 0, flag = 0; 29121da177e4SLinus Torvalds 2913fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29141da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29157b190fecSNeilBrown open->op_recall = 0; 29167b190fecSNeilBrown switch (open->op_claim_type) { 29177b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29182bf23875SJ. Bruce Fields if (!cb_up) 29197b190fecSNeilBrown open->op_recall = 1; 29207b190fecSNeilBrown flag = open->op_delegate_type; 29217b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29221da177e4SLinus Torvalds goto out; 29237b190fecSNeilBrown break; 29247b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29257b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29267b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2927af558e33SJ. Bruce Fields if (locks_in_grace()) 29287b190fecSNeilBrown goto out; 2929dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29307b190fecSNeilBrown goto out; 29311da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29321da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29331da177e4SLinus Torvalds else 29341da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29357b190fecSNeilBrown break; 29367b190fecSNeilBrown default: 29377b190fecSNeilBrown goto out; 29387b190fecSNeilBrown } 29391da177e4SLinus Torvalds 2940fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2941dd239cc0SJ. Bruce Fields if (dp == NULL) 2942dd239cc0SJ. Bruce Fields goto out_no_deleg; 2943acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2944edab9782SJ. Bruce Fields if (status) 2945dd239cc0SJ. Bruce Fields goto out_free; 29461da177e4SLinus Torvalds 2947d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29481da177e4SLinus Torvalds 29498c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2950d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29511da177e4SLinus Torvalds out: 29521da177e4SLinus Torvalds open->op_delegate_type = flag; 2953d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2954d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2955d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2956d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2957d24433cdSBenny Halevy 29584aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29594aa8913cSBenny Halevy if (open->op_deleg_want) 29604aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2961d24433cdSBenny Halevy } 2962dd239cc0SJ. Bruce Fields return; 2963dd239cc0SJ. Bruce Fields out_free: 2964acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2965dd239cc0SJ. Bruce Fields out_no_deleg: 2966dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2967dd239cc0SJ. Bruce Fields goto out; 29681da177e4SLinus Torvalds } 29691da177e4SLinus Torvalds 2970e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2971e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2972e27f49c3SBenny Halevy { 2973e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2974e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2975e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2976e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2977e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2978e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2979e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2980e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2981e27f49c3SBenny Halevy } 2982e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2983e27f49c3SBenny Halevy * it already has, therefore we don't return 2984e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2985e27f49c3SBenny Halevy */ 2986e27f49c3SBenny Halevy } 2987e27f49c3SBenny Halevy 29881da177e4SLinus Torvalds /* 29891da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29901da177e4SLinus Torvalds */ 2991b37ad28bSAl Viro __be32 29921da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29931da177e4SLinus Torvalds { 29946668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 299538c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29961da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29971da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2998dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2999567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3000b37ad28bSAl Viro __be32 status; 30011da177e4SLinus Torvalds 30021da177e4SLinus Torvalds /* 30031da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30041da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30051da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30061da177e4SLinus Torvalds */ 30071da177e4SLinus Torvalds fp = find_file(ino); 30081da177e4SLinus Torvalds if (fp) { 30091da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30101da177e4SLinus Torvalds goto out; 301138c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3012c44c5eebSNeilBrown if (status) 3013c44c5eebSNeilBrown goto out; 30141da177e4SLinus Torvalds } else { 3015c44c5eebSNeilBrown status = nfserr_bad_stateid; 30168b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3017c44c5eebSNeilBrown goto out; 30183e772463SJ. Bruce Fields status = nfserr_jukebox; 301932513b40SJ. Bruce Fields fp = open->op_file; 302032513b40SJ. Bruce Fields open->op_file = NULL; 302132513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30221da177e4SLinus Torvalds } 30231da177e4SLinus Torvalds 30241da177e4SLinus Torvalds /* 30251da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30261da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30271da177e4SLinus Torvalds */ 30281da177e4SLinus Torvalds if (stp) { 30291da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3030f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30311da177e4SLinus Torvalds if (status) 30321da177e4SLinus Torvalds goto out; 30331da177e4SLinus Torvalds } else { 30344cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3035567d9829SNeilBrown if (status) 30361da177e4SLinus Torvalds goto out; 30374cdc951bSJ. Bruce Fields stp = open->op_stp; 30384cdc951bSJ. Bruce Fields open->op_stp = NULL; 3039996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30401da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30411da177e4SLinus Torvalds if (status) { 30422283963fSJ. Bruce Fields release_open_stateid(stp); 30431da177e4SLinus Torvalds goto out; 30441da177e4SLinus Torvalds } 30451da177e4SLinus Torvalds } 3046dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3047dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30481da177e4SLinus Torvalds 3049d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3050dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30516668958fSAndy Adamson 3052d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3053d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3054d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3055d24433cdSBenny Halevy goto nodeleg; 3056d24433cdSBenny Halevy } 3057d24433cdSBenny Halevy } 3058d24433cdSBenny Halevy 30591da177e4SLinus Torvalds /* 30601da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30611da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30621da177e4SLinus Torvalds */ 30631da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3064d24433cdSBenny Halevy nodeleg: 30651da177e4SLinus Torvalds status = nfs_ok; 30661da177e4SLinus Torvalds 30678c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3068dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30691da177e4SLinus Torvalds out: 3070d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3071d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3072e27f49c3SBenny Halevy open->op_deleg_want) 3073e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3074d24433cdSBenny Halevy 307513cd2184SNeilBrown if (fp) 307613cd2184SNeilBrown put_nfs4_file(fp); 307737515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30781255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30791da177e4SLinus Torvalds /* 30801da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30811da177e4SLinus Torvalds */ 30821da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3083dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30846668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30851da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30861da177e4SLinus Torvalds 30871da177e4SLinus Torvalds return status; 30881da177e4SLinus Torvalds } 30891da177e4SLinus Torvalds 3090d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3091d29b20cdSJ. Bruce Fields { 3092d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3093d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3094d29b20cdSJ. Bruce Fields 3095d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3096d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3097d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3098d29b20cdSJ. Bruce Fields if (status) { 3099d29b20cdSJ. Bruce Fields release_openowner(oo); 3100d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3101d29b20cdSJ. Bruce Fields } else 3102d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3103d29b20cdSJ. Bruce Fields } 3104d29b20cdSJ. Bruce Fields } 310532513b40SJ. Bruce Fields if (open->op_file) 310632513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31074cdc951bSJ. Bruce Fields if (open->op_stp) 31084cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3109d29b20cdSJ. Bruce Fields } 3110d29b20cdSJ. Bruce Fields 3111b37ad28bSAl Viro __be32 3112b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3113b591480bSJ.Bruce Fields clientid_t *clid) 31141da177e4SLinus Torvalds { 31151da177e4SLinus Torvalds struct nfs4_client *clp; 3116b37ad28bSAl Viro __be32 status; 31171da177e4SLinus Torvalds 31181da177e4SLinus Torvalds nfs4_lock_state(); 31191da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31201da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31211da177e4SLinus Torvalds status = nfserr_stale_clientid; 31221da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31231da177e4SLinus Torvalds goto out; 31241da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31251da177e4SLinus Torvalds status = nfserr_expired; 31261da177e4SLinus Torvalds if (clp == NULL) { 31271da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31281da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31291da177e4SLinus Torvalds goto out; 31301da177e4SLinus Torvalds } 31311da177e4SLinus Torvalds status = nfserr_cb_path_down; 3132ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 313377a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31341da177e4SLinus Torvalds goto out; 31351da177e4SLinus Torvalds status = nfs_ok; 31361da177e4SLinus Torvalds out: 31371da177e4SLinus Torvalds nfs4_unlock_state(); 31381da177e4SLinus Torvalds return status; 31391da177e4SLinus Torvalds } 31401da177e4SLinus Torvalds 3141c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3142af558e33SJ. Bruce Fields }; 3143af558e33SJ. Bruce Fields 314433dcc481SJeff Layton static bool grace_ended; 314533dcc481SJeff Layton 3146a76b4319SNeilBrown static void 3147af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3148a76b4319SNeilBrown { 314933dcc481SJeff Layton /* do nothing if grace period already ended */ 315033dcc481SJeff Layton if (grace_ended) 315133dcc481SJeff Layton return; 315233dcc481SJeff Layton 3153a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 315433dcc481SJeff Layton grace_ended = true; 31552a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3156af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3157e46b498cSJ. Bruce Fields /* 3158e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3159e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3160e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3161e46b498cSJ. Bruce Fields */ 3162e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3163a76b4319SNeilBrown } 3164a76b4319SNeilBrown 3165fd39ca9aSNeilBrown static time_t 31661da177e4SLinus Torvalds nfs4_laundromat(void) 31671da177e4SLinus Torvalds { 31681da177e4SLinus Torvalds struct nfs4_client *clp; 3169fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31701da177e4SLinus Torvalds struct nfs4_delegation *dp; 31711da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3172cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3173cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3174cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31751da177e4SLinus Torvalds 31761da177e4SLinus Torvalds nfs4_lock_state(); 31771da177e4SLinus Torvalds 31781da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3179af558e33SJ. Bruce Fields nfsd4_end_grace(); 318036acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 318136acb66bSBenny Halevy spin_lock(&client_lock); 31821da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31831da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31841da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31851da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31861da177e4SLinus Torvalds if (clientid_val > t) 31871da177e4SLinus Torvalds clientid_val = t; 31881da177e4SLinus Torvalds break; 31891da177e4SLinus Torvalds } 3190d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3191d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3192d7682988SBenny Halevy clp->cl_clientid.cl_id); 3193d7682988SBenny Halevy continue; 3194d7682988SBenny Halevy } 3195d7682988SBenny Halevy unhash_client_locked(clp); 3196d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 319736acb66bSBenny Halevy } 319836acb66bSBenny Halevy spin_unlock(&client_lock); 319936acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 320036acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32011da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32021da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32032a4317c5SJeff Layton nfsd4_client_record_remove(clp); 32041da177e4SLinus Torvalds expire_client(clp); 32051da177e4SLinus Torvalds } 32061da177e4SLinus Torvalds spin_lock(&recall_lock); 32071da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32081da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32091da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32101da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32111da177e4SLinus Torvalds if (test_val > u) 32121da177e4SLinus Torvalds test_val = u; 32131da177e4SLinus Torvalds break; 32141da177e4SLinus Torvalds } 32151da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32161da177e4SLinus Torvalds } 32171da177e4SLinus Torvalds spin_unlock(&recall_lock); 32181da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32191da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32201da177e4SLinus Torvalds unhash_delegation(dp); 32211da177e4SLinus Torvalds } 3222cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32231da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3224fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3225fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3226fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32271da177e4SLinus Torvalds if (test_val > u) 32281da177e4SLinus Torvalds test_val = u; 32291da177e4SLinus Torvalds break; 32301da177e4SLinus Torvalds } 3231fe0750e5SJ. Bruce Fields release_openowner(oo); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32341da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32351da177e4SLinus Torvalds nfs4_unlock_state(); 32361da177e4SLinus Torvalds return clientid_val; 32371da177e4SLinus Torvalds } 32381da177e4SLinus Torvalds 3239a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3240a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3241a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3242a254b246SHarvey Harrison 3243a254b246SHarvey Harrison static void 3244c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32451da177e4SLinus Torvalds { 32461da177e4SLinus Torvalds time_t t; 32471da177e4SLinus Torvalds 32481da177e4SLinus Torvalds t = nfs4_laundromat(); 32491da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 325058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds 3253f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3254f8816512SNeilBrown { 3255f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3256f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3257f7a4d872SJ. Bruce Fields return nfs_ok; 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 32601da177e4SLinus Torvalds static int 32611da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32621da177e4SLinus Torvalds { 3263d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3264e4e83ea4SJ. Bruce Fields return 0; 32658c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32668c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32671da177e4SLinus Torvalds return 1; 32681da177e4SLinus Torvalds } 32691da177e4SLinus Torvalds 32701da177e4SLinus Torvalds static inline int 327182c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32721da177e4SLinus Torvalds { 327382c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 327482c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 327582c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32761da177e4SLinus Torvalds } 32771da177e4SLinus Torvalds 32781da177e4SLinus Torvalds static inline int 327982c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32801da177e4SLinus Torvalds { 328182c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 328282c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32831da177e4SLinus Torvalds } 32841da177e4SLinus Torvalds 32851da177e4SLinus Torvalds static 3286dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32871da177e4SLinus Torvalds { 3288b37ad28bSAl Viro __be32 status = nfserr_openmode; 32891da177e4SLinus Torvalds 329002921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 329102921914SJ. Bruce Fields if (stp->st_openstp) 329202921914SJ. Bruce Fields stp = stp->st_openstp; 329382c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 32941da177e4SLinus Torvalds goto out; 329582c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 32961da177e4SLinus Torvalds goto out; 32971da177e4SLinus Torvalds status = nfs_ok; 32981da177e4SLinus Torvalds out: 32991da177e4SLinus Torvalds return status; 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds 3302b37ad28bSAl Viro static inline __be32 33031da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 33041da177e4SLinus Torvalds { 3305203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33061da177e4SLinus Torvalds return nfs_ok; 3307af558e33SJ. Bruce Fields else if (locks_in_grace()) { 330825985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33091da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33101da177e4SLinus Torvalds return nfserr_grace; 33111da177e4SLinus Torvalds } else if (flags & WR_STATE) 33121da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33131da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33141da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33151da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33161da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33171da177e4SLinus Torvalds } 33181da177e4SLinus Torvalds 33191da177e4SLinus Torvalds /* 33201da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33211da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33221da177e4SLinus Torvalds */ 33231da177e4SLinus Torvalds static inline int 332418f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33251da177e4SLinus Torvalds { 3326203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33271da177e4SLinus Torvalds } 33281da177e4SLinus Torvalds 332981b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 333081b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 333181b82965SJ. Bruce Fields { 333281b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 333381b82965SJ. Bruce Fields } 333481b82965SJ. Bruce Fields 333557b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33360836f587SJ. Bruce Fields { 33376668958fSAndy Adamson /* 33386668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33396668958fSAndy Adamson * when it is zero. 33406668958fSAndy Adamson */ 334128dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 334281b82965SJ. Bruce Fields return nfs_ok; 334381b82965SJ. Bruce Fields 334481b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 334581b82965SJ. Bruce Fields return nfs_ok; 33466668958fSAndy Adamson 33470836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 334881b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33490836f587SJ. Bruce Fields return nfserr_bad_stateid; 33500836f587SJ. Bruce Fields /* 335181b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 335281b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 335381b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 335481b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 335581b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 335681b82965SJ. Bruce Fields * but better performance may result in retrying IO that 335781b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 335881b82965SJ. Bruce Fields * reordered in flight: 33590836f587SJ. Bruce Fields */ 33600836f587SJ. Bruce Fields return nfserr_old_stateid; 33610836f587SJ. Bruce Fields } 33620836f587SJ. Bruce Fields 336338c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 336417456804SBryan Schumaker { 336597b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 336697b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 336797b7e3b6SJ. Bruce Fields __be32 status; 336817456804SBryan Schumaker 336917456804SBryan Schumaker if (STALE_STATEID(stateid)) 337097b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 337117456804SBryan Schumaker 337238c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 337397b7e3b6SJ. Bruce Fields if (!s) 337497b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 337536279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 337617456804SBryan Schumaker if (status) 337717456804SBryan Schumaker return status; 337897b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 337997b7e3b6SJ. Bruce Fields return nfs_ok; 338097b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 338197b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3382dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 338397b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 338497b7e3b6SJ. Bruce Fields return nfs_ok; 338517456804SBryan Schumaker } 338617456804SBryan Schumaker 338738c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 338838c2f4b1SJ. Bruce Fields { 338938c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 339038c2f4b1SJ. Bruce Fields 339138c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 339238c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 339338c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 339438c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 339538c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 339638c2f4b1SJ. Bruce Fields if (!cl) 339738c2f4b1SJ. Bruce Fields return nfserr_expired; 339838c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 339938c2f4b1SJ. Bruce Fields if (!*s) 340038c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 340138c2f4b1SJ. Bruce Fields return nfs_ok; 340238c2f4b1SJ. Bruce Fields 340338c2f4b1SJ. Bruce Fields } 340438c2f4b1SJ. Bruce Fields 34051da177e4SLinus Torvalds /* 34061da177e4SLinus Torvalds * Checks for stateid operations 34071da177e4SLinus Torvalds */ 3408b37ad28bSAl Viro __be32 3409dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3410dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34111da177e4SLinus Torvalds { 341269064a27SJ. Bruce Fields struct nfs4_stid *s; 3413dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34141da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3415dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34161da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3417b37ad28bSAl Viro __be32 status; 34181da177e4SLinus Torvalds 34191da177e4SLinus Torvalds if (filpp) 34201da177e4SLinus Torvalds *filpp = NULL; 34211da177e4SLinus Torvalds 342218f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34231da177e4SLinus Torvalds return nfserr_grace; 34241da177e4SLinus Torvalds 34251da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34261da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34271da177e4SLinus Torvalds 342838c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 342938c2f4b1SJ. Bruce Fields if (status) 343038c2f4b1SJ. Bruce Fields return status; 343169064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34320c2a498fSJ. Bruce Fields if (status) 34330c2a498fSJ. Bruce Fields goto out; 3434f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3435f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 343669064a27SJ. Bruce Fields dp = delegstateid(s); 3437dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3438dc9bf700SJ. Bruce Fields if (status) 3439dc9bf700SJ. Bruce Fields goto out; 344043b0178eSDan Carpenter if (filpp) { 3441acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3442f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 344343b0178eSDan Carpenter } 3444f7a4d872SJ. Bruce Fields break; 3445f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3446f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 344769064a27SJ. Bruce Fields stp = openlockstateid(s); 3448f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3449f7a4d872SJ. Bruce Fields if (status) 34501da177e4SLinus Torvalds goto out; 3451fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3452dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34531da177e4SLinus Torvalds goto out; 3454a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3455a4455be0SJ. Bruce Fields if (status) 34561da177e4SLinus Torvalds goto out; 3457f9d7562fSJ. Bruce Fields if (filpp) { 3458f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3459f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3460f9d7562fSJ. Bruce Fields else 3461f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3462f9d7562fSJ. Bruce Fields } 3463f7a4d872SJ. Bruce Fields break; 3464f7a4d872SJ. Bruce Fields default: 3465f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34661da177e4SLinus Torvalds } 34671da177e4SLinus Torvalds status = nfs_ok; 34681da177e4SLinus Torvalds out: 34691da177e4SLinus Torvalds return status; 34701da177e4SLinus Torvalds } 34711da177e4SLinus Torvalds 3472e1ca12dfSBryan Schumaker static __be32 3473dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3474e1ca12dfSBryan Schumaker { 3475fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3476e1ca12dfSBryan Schumaker return nfserr_locks_held; 3477e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3478e1ca12dfSBryan Schumaker return nfs_ok; 3479e1ca12dfSBryan Schumaker } 3480e1ca12dfSBryan Schumaker 3481e1ca12dfSBryan Schumaker /* 348217456804SBryan Schumaker * Test if the stateid is valid 348317456804SBryan Schumaker */ 348417456804SBryan Schumaker __be32 348517456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 348617456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 348717456804SBryan Schumaker { 348803cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 348903cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 349003cfb420SBryan Schumaker 349103cfb420SBryan Schumaker nfs4_lock_state(); 349203cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 349303cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 349403cfb420SBryan Schumaker nfs4_unlock_state(); 349503cfb420SBryan Schumaker 349617456804SBryan Schumaker return nfs_ok; 349717456804SBryan Schumaker } 349817456804SBryan Schumaker 3499e1ca12dfSBryan Schumaker __be32 3500e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3501e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3502e1ca12dfSBryan Schumaker { 3503e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35042da1cec7SJ. Bruce Fields struct nfs4_stid *s; 350538c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35062da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3507e1ca12dfSBryan Schumaker 3508e1ca12dfSBryan Schumaker nfs4_lock_state(); 350938c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35102da1cec7SJ. Bruce Fields if (!s) 3511e1ca12dfSBryan Schumaker goto out; 35122da1cec7SJ. Bruce Fields switch (s->sc_type) { 35132da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3514e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3515e1ca12dfSBryan Schumaker goto out; 35162da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35172da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35182da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35192da1cec7SJ. Bruce Fields if (ret) 3520e1ca12dfSBryan Schumaker goto out; 35212da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35222da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35232da1cec7SJ. Bruce Fields else 35242da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3525f7a4d872SJ. Bruce Fields break; 3526f7a4d872SJ. Bruce Fields default: 3527f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3528e1ca12dfSBryan Schumaker } 3529e1ca12dfSBryan Schumaker out: 3530e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3531e1ca12dfSBryan Schumaker return ret; 3532e1ca12dfSBryan Schumaker } 3533e1ca12dfSBryan Schumaker 35344c4cd222SNeilBrown static inline int 35354c4cd222SNeilBrown setlkflg (int type) 35364c4cd222SNeilBrown { 35374c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35384c4cd222SNeilBrown RD_STATE : WR_STATE; 35394c4cd222SNeilBrown } 35401da177e4SLinus Torvalds 3541dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3542c0a5d93eSJ. Bruce Fields { 3543c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3544c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3545c0a5d93eSJ. Bruce Fields __be32 status; 3546c0a5d93eSJ. Bruce Fields 3547c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3548c0a5d93eSJ. Bruce Fields if (status) 3549c0a5d93eSJ. Bruce Fields return status; 3550f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3551f7a4d872SJ. Bruce Fields /* 3552f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3553f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3554f7a4d872SJ. Bruce Fields */ 3555f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3556f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3557f7a4d872SJ. Bruce Fields if (status) 3558f7a4d872SJ. Bruce Fields return status; 3559f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3560c0a5d93eSJ. Bruce Fields } 3561c0a5d93eSJ. Bruce Fields 35621da177e4SLinus Torvalds /* 35631da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35641da177e4SLinus Torvalds */ 3565b37ad28bSAl Viro static __be32 3566dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35672288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3568dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35691da177e4SLinus Torvalds { 35700836f587SJ. Bruce Fields __be32 status; 357138c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35721da177e4SLinus Torvalds 35738c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35748c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35751da177e4SLinus Torvalds 35761da177e4SLinus Torvalds *stpp = NULL; 357738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3578c0a5d93eSJ. Bruce Fields if (status) 3579c0a5d93eSJ. Bruce Fields return status; 358038c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3581c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35821da177e4SLinus Torvalds 3583c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35841da177e4SLinus Torvalds } 35851da177e4SLinus Torvalds 3586dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3587c0a5d93eSJ. Bruce Fields { 3588c0a5d93eSJ. Bruce Fields __be32 status; 3589c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35901da177e4SLinus Torvalds 3591c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35922288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35930836f587SJ. Bruce Fields if (status) 35940836f587SJ. Bruce Fields return status; 3595c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3596dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3597c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35983a4f98bbSNeilBrown return nfs_ok; 35991da177e4SLinus Torvalds } 36001da177e4SLinus Torvalds 3601b37ad28bSAl Viro __be32 3602ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3603a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36041da177e4SLinus Torvalds { 3605b37ad28bSAl Viro __be32 status; 3606fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3607dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36081da177e4SLinus Torvalds 36091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3610ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3611ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36121da177e4SLinus Torvalds 3613ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3614a8cddc5dSJ. Bruce Fields if (status) 3615a8cddc5dSJ. Bruce Fields return status; 36161da177e4SLinus Torvalds 36171da177e4SLinus Torvalds nfs4_lock_state(); 36181da177e4SLinus Torvalds 36199072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3620ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36212288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36229072d5c6SJ. Bruce Fields if (status) 36231da177e4SLinus Torvalds goto out; 3624fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 362568b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3626dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 362768b66e82SJ. Bruce Fields goto out; 3628dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3629dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3630dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36318c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3632dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3633c7b9a459SNeilBrown 36342a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 363568b66e82SJ. Bruce Fields status = nfs_ok; 36361da177e4SLinus Torvalds out: 36375ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36381da177e4SLinus Torvalds nfs4_unlock_state(); 36391da177e4SLinus Torvalds return status; 36401da177e4SLinus Torvalds } 36411da177e4SLinus Torvalds 36426409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36431da177e4SLinus Torvalds { 364482c5ff1bSJeff Layton if (!test_access(access, stp)) 36456409a5a6SJ. Bruce Fields return; 36466409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 364782c5ff1bSJeff Layton clear_access(access, stp); 3648f197c271SJ. Bruce Fields } 36496409a5a6SJ. Bruce Fields 36506409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36516409a5a6SJ. Bruce Fields { 36526409a5a6SJ. Bruce Fields switch (to_access) { 36536409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36546409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36556409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36566409a5a6SJ. Bruce Fields break; 36576409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36586409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36596409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36606409a5a6SJ. Bruce Fields break; 36616409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36626409a5a6SJ. Bruce Fields break; 36636409a5a6SJ. Bruce Fields default: 36646409a5a6SJ. Bruce Fields BUG(); 36651da177e4SLinus Torvalds } 36661da177e4SLinus Torvalds } 36671da177e4SLinus Torvalds 36681da177e4SLinus Torvalds static void 3669ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36701da177e4SLinus Torvalds { 36711da177e4SLinus Torvalds int i; 36721da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36731da177e4SLinus Torvalds if ((i & deny) != i) 3674ce0fc43cSJeff Layton clear_deny(i, stp); 36751da177e4SLinus Torvalds } 36761da177e4SLinus Torvalds } 36771da177e4SLinus Torvalds 3678b37ad28bSAl Viro __be32 3679ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3680ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3681a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36821da177e4SLinus Torvalds { 3683b37ad28bSAl Viro __be32 status; 3684dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36851da177e4SLinus Torvalds 36861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3687ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3688ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36891da177e4SLinus Torvalds 3690c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36912c8bd7e0SBenny Halevy if (od->od_deleg_want) 36922c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36932c8bd7e0SBenny Halevy od->od_deleg_want); 36941da177e4SLinus Torvalds 36951da177e4SLinus Torvalds nfs4_lock_state(); 3696c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3697c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36989072d5c6SJ. Bruce Fields if (status) 36991da177e4SLinus Torvalds goto out; 37001da177e4SLinus Torvalds status = nfserr_inval; 370182c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37021da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37031da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37041da177e4SLinus Torvalds goto out; 37051da177e4SLinus Torvalds } 3706ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37071da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37081da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37091da177e4SLinus Torvalds goto out; 37101da177e4SLinus Torvalds } 37116409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37121da177e4SLinus Torvalds 3713ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37141da177e4SLinus Torvalds 3715dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3716dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37171da177e4SLinus Torvalds status = nfs_ok; 37181da177e4SLinus Torvalds out: 37195ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37201da177e4SLinus Torvalds nfs4_unlock_state(); 37211da177e4SLinus Torvalds return status; 37221da177e4SLinus Torvalds } 37231da177e4SLinus Torvalds 372438c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 372538c387b5SJ. Bruce Fields { 372638c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 372738c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 372838c387b5SJ. Bruce Fields 372938c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 373038c387b5SJ. Bruce Fields return; 373138c387b5SJ. Bruce Fields oo = openowner(so); 373238c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 373338c387b5SJ. Bruce Fields if (!s) 373438c387b5SJ. Bruce Fields return; 373538c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 373638c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 373738c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 373838c387b5SJ. Bruce Fields return; 373938c387b5SJ. Bruce Fields } 374038c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3741f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3742f7a4d872SJ. Bruce Fields } 3743f7a4d872SJ. Bruce Fields 3744f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3745f7a4d872SJ. Bruce Fields { 3746f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3747f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 374838c387b5SJ. Bruce Fields } 374938c387b5SJ. Bruce Fields 37501da177e4SLinus Torvalds /* 37511da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37521da177e4SLinus Torvalds */ 3753b37ad28bSAl Viro __be32 3754ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3755a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37561da177e4SLinus Torvalds { 3757b37ad28bSAl Viro __be32 status; 3758fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3759dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37601da177e4SLinus Torvalds 37611da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3762ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3763ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37641da177e4SLinus Torvalds 37651da177e4SLinus Torvalds nfs4_lock_state(); 3766f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3767f7a4d872SJ. Bruce Fields &close->cl_stateid, 3768f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3769f7a4d872SJ. Bruce Fields &stp); 37709072d5c6SJ. Bruce Fields if (status) 37711da177e4SLinus Torvalds goto out; 3772fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37731da177e4SLinus Torvalds status = nfs_ok; 3774dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3775dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37761da177e4SLinus Torvalds 3777f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 377838c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 377904ef5954SJ. Bruce Fields 378004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 378104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 378204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 378304ef5954SJ. Bruce Fields */ 3784fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3785fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 37861da177e4SLinus Torvalds out: 37875ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37881da177e4SLinus Torvalds nfs4_unlock_state(); 37891da177e4SLinus Torvalds return status; 37901da177e4SLinus Torvalds } 37911da177e4SLinus Torvalds 3792b37ad28bSAl Viro __be32 3793ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3794ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37951da177e4SLinus Torvalds { 3796203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3797203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 379838c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3799203a8c8eSJ. Bruce Fields struct inode *inode; 3800b37ad28bSAl Viro __be32 status; 38011da177e4SLinus Torvalds 3802ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3803203a8c8eSJ. Bruce Fields return status; 3804203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38051da177e4SLinus Torvalds 38061da177e4SLinus Torvalds nfs4_lock_state(); 380738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 380838c2f4b1SJ. Bruce Fields if (status) 3809203a8c8eSJ. Bruce Fields goto out; 381038c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3811d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3812203a8c8eSJ. Bruce Fields if (status) 3813203a8c8eSJ. Bruce Fields goto out; 3814203a8c8eSJ. Bruce Fields 3815203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38161da177e4SLinus Torvalds out: 3817203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3818203a8c8eSJ. Bruce Fields 38191da177e4SLinus Torvalds return status; 38201da177e4SLinus Torvalds } 38211da177e4SLinus Torvalds 38221da177e4SLinus Torvalds 38231da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38241da177e4SLinus Torvalds 3825009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3826009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3827009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38281da177e4SLinus Torvalds 382987df4de8SBenny Halevy static inline u64 383087df4de8SBenny Halevy end_offset(u64 start, u64 len) 383187df4de8SBenny Halevy { 383287df4de8SBenny Halevy u64 end; 383387df4de8SBenny Halevy 383487df4de8SBenny Halevy end = start + len; 383587df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 383687df4de8SBenny Halevy } 383787df4de8SBenny Halevy 383887df4de8SBenny Halevy /* last octet in a range */ 383987df4de8SBenny Halevy static inline u64 384087df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 384187df4de8SBenny Halevy { 384287df4de8SBenny Halevy u64 end; 384387df4de8SBenny Halevy 384487df4de8SBenny Halevy BUG_ON(!len); 384587df4de8SBenny Halevy end = start + len; 384687df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 384787df4de8SBenny Halevy } 384887df4de8SBenny Halevy 3849009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38501da177e4SLinus Torvalds { 38511da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38521da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3853009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38541da177e4SLinus Torvalds } 38551da177e4SLinus Torvalds 3856009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38571da177e4SLinus Torvalds 38581da177e4SLinus Torvalds /* 38591da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38601da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38611da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38621da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38631da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38641da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38651da177e4SLinus Torvalds */ 38661da177e4SLinus Torvalds static inline void 38671da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38681da177e4SLinus Torvalds { 38691da177e4SLinus Torvalds if (lock->fl_start < 0) 38701da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38711da177e4SLinus Torvalds if (lock->fl_end < 0) 38721da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38731da177e4SLinus Torvalds } 38741da177e4SLinus Torvalds 3875d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3876d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38777b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3878d5b9026aSNeilBrown }; 38791da177e4SLinus Torvalds 38801da177e4SLinus Torvalds static inline void 38811da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38821da177e4SLinus Torvalds { 3883fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38841da177e4SLinus Torvalds 3885d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3886fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3887fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3888fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38897c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38907c13f344SJ. Bruce Fields /* We just don't care that much */ 38917c13f344SJ. Bruce Fields goto nevermind; 3892fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3893fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3894d5b9026aSNeilBrown } else { 38957c13f344SJ. Bruce Fields nevermind: 38967c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38977c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3898d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3899d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39001da177e4SLinus Torvalds } 39011da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 390287df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 390387df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39041da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39051da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39061da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39071da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39081da177e4SLinus Torvalds } 39091da177e4SLinus Torvalds 3910b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3911b93d87c1SJ. Bruce Fields { 3912b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3913b93d87c1SJ. Bruce Fields 3914b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3915b93d87c1SJ. Bruce Fields return false; 3916b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3917b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3918b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3919b93d87c1SJ. Bruce Fields } 3920b93d87c1SJ. Bruce Fields 3921fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3922fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39231da177e4SLinus Torvalds struct xdr_netobj *owner) 39241da177e4SLinus Torvalds { 3925009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3926b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39271da177e4SLinus Torvalds 3928009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3929b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3930b93d87c1SJ. Bruce Fields return lo; 39311da177e4SLinus Torvalds } 39321da177e4SLinus Torvalds return NULL; 39331da177e4SLinus Torvalds } 39341da177e4SLinus Torvalds 3935dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3936ff194bd9SJ. Bruce Fields { 3937009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3938009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3939009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3940009673b4SJ. Bruce Fields 394116bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3942009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3943fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3944ff194bd9SJ. Bruce Fields } 3945ff194bd9SJ. Bruce Fields 39461da177e4SLinus Torvalds /* 39471da177e4SLinus Torvalds * Alloc a lock owner structure. 39481da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 394925985edcSLucas De Marchi * occurred. 39501da177e4SLinus Torvalds * 395116bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39521da177e4SLinus Torvalds */ 39531da177e4SLinus Torvalds 3954fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3955dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3956fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39571da177e4SLinus Torvalds 3958fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3959fe0750e5SJ. Bruce Fields if (!lo) 39601da177e4SLinus Torvalds return NULL; 3961fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3962fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3963b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3964b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3965fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3966fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3967fe0750e5SJ. Bruce Fields return lo; 39681da177e4SLinus Torvalds } 39691da177e4SLinus Torvalds 3970dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3971dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39721da177e4SLinus Torvalds { 3973dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3974d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39751da177e4SLinus Torvalds 3976996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39775ac049acSNeilBrown if (stp == NULL) 39786136d2b4SJ. Bruce Fields return NULL; 3979996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39808beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3981fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3982fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 398313cd2184SNeilBrown get_nfs4_file(fp); 39841da177e4SLinus Torvalds stp->st_file = fp; 39850997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39861da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39874c4cd222SNeilBrown stp->st_openstp = open_stp; 39881da177e4SLinus Torvalds return stp; 39891da177e4SLinus Torvalds } 39901da177e4SLinus Torvalds 3991fd39ca9aSNeilBrown static int 39921da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39931da177e4SLinus Torvalds { 399487df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39951da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39961da177e4SLinus Torvalds } 39971da177e4SLinus Torvalds 3998dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39990997b173SJ. Bruce Fields { 40000997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40010997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40020997b173SJ. Bruce Fields 400382c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40040997b173SJ. Bruce Fields return; 40050997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 400682c5ff1bSJeff Layton set_access(access, lock_stp); 40070997b173SJ. Bruce Fields } 40080997b173SJ. Bruce Fields 40092355c596SJ. 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) 401064a284d0SJ. Bruce Fields { 401164a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 401264a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 401364a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 401464a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 401564a284d0SJ. Bruce Fields unsigned int strhashval; 401664a284d0SJ. Bruce Fields 401764a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 401864a284d0SJ. Bruce Fields if (lo) { 401964a284d0SJ. Bruce Fields if (!cstate->minorversion) 402064a284d0SJ. Bruce Fields return nfserr_bad_seqid; 402164a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 402264a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 402364a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 402464a284d0SJ. Bruce Fields return nfs_ok; 402564a284d0SJ. Bruce Fields } 402616bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 402764a284d0SJ. Bruce Fields &lock->v.new.owner); 402864a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 402964a284d0SJ. Bruce Fields if (lo == NULL) 403064a284d0SJ. Bruce Fields return nfserr_jukebox; 403164a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 403264a284d0SJ. Bruce Fields if (*lst == NULL) { 403364a284d0SJ. Bruce Fields release_lockowner(lo); 403464a284d0SJ. Bruce Fields return nfserr_jukebox; 403564a284d0SJ. Bruce Fields } 403664a284d0SJ. Bruce Fields *new = true; 403764a284d0SJ. Bruce Fields return nfs_ok; 403864a284d0SJ. Bruce Fields } 403964a284d0SJ. Bruce Fields 40401da177e4SLinus Torvalds /* 40411da177e4SLinus Torvalds * LOCK operation 40421da177e4SLinus Torvalds */ 4043b37ad28bSAl Viro __be32 4044ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4045a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40461da177e4SLinus Torvalds { 4047fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4048fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4049dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40507d947842SJ. Bruce Fields struct file *filp = NULL; 40511da177e4SLinus Torvalds struct file_lock file_lock; 40528dc7c311SAndy Adamson struct file_lock conflock; 4053b37ad28bSAl Viro __be32 status = 0; 405464a284d0SJ. Bruce Fields bool new_state = false; 4055b34f27aaSJ. Bruce Fields int lkflg; 4056b8dd7b9aSAl Viro int err; 40571da177e4SLinus Torvalds 40581da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40591da177e4SLinus Torvalds (long long) lock->lk_offset, 40601da177e4SLinus Torvalds (long long) lock->lk_length); 40611da177e4SLinus Torvalds 40621da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40631da177e4SLinus Torvalds return nfserr_inval; 40641da177e4SLinus Torvalds 4065ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40668837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4067a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4068a6f6ef2fSAndy Adamson return status; 4069a6f6ef2fSAndy Adamson } 4070a6f6ef2fSAndy Adamson 40711da177e4SLinus Torvalds nfs4_lock_state(); 40721da177e4SLinus Torvalds 40731da177e4SLinus Torvalds if (lock->lk_is_new) { 40741da177e4SLinus Torvalds /* 40751da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4076893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4077893f8770SNeilBrown * lock stateid. 40781da177e4SLinus Torvalds */ 4079dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40801da177e4SLinus Torvalds 4081684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4082684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4083684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4084684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4085684e5638SJ. Bruce Fields sizeof(clientid_t)); 4086684e5638SJ. Bruce Fields 40871da177e4SLinus Torvalds status = nfserr_stale_clientid; 4088684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40891da177e4SLinus Torvalds goto out; 40901da177e4SLinus Torvalds 40911da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4092c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40931da177e4SLinus Torvalds lock->lk_new_open_seqid, 40941da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4095c0a5d93eSJ. Bruce Fields &open_stp); 409637515177SNeilBrown if (status) 40971da177e4SLinus Torvalds goto out; 4098fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4099b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4100684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4101b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4102b34f27aaSJ. Bruce Fields goto out; 410364a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 410464a284d0SJ. Bruce Fields &lock_stp, &new_state); 410564a284d0SJ. Bruce Fields if (status) 41061da177e4SLinus Torvalds goto out; 41071da177e4SLinus Torvalds } else { 41081da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4109dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41101da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41111da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41122288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41131da177e4SLinus Torvalds if (status) 41141da177e4SLinus Torvalds goto out; 411564a284d0SJ. Bruce Fields } 4116fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41171da177e4SLinus Torvalds 4118b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4119b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4120b34f27aaSJ. Bruce Fields if (status) 4121b34f27aaSJ. Bruce Fields goto out; 4122b34f27aaSJ. Bruce Fields 41230dd395dcSNeilBrown status = nfserr_grace; 4124af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41250dd395dcSNeilBrown goto out; 41260dd395dcSNeilBrown status = nfserr_no_grace; 4127af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41280dd395dcSNeilBrown goto out; 41290dd395dcSNeilBrown 41301da177e4SLinus Torvalds locks_init_lock(&file_lock); 41311da177e4SLinus Torvalds switch (lock->lk_type) { 41321da177e4SLinus Torvalds case NFS4_READ_LT: 41331da177e4SLinus Torvalds case NFS4_READW_LT: 4134f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41350997b173SJ. Bruce Fields if (filp) 41360997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41371da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41381da177e4SLinus Torvalds break; 41391da177e4SLinus Torvalds case NFS4_WRITE_LT: 41401da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4141f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41420997b173SJ. Bruce Fields if (filp) 41430997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41441da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41451da177e4SLinus Torvalds break; 41461da177e4SLinus Torvalds default: 41471da177e4SLinus Torvalds status = nfserr_inval; 41481da177e4SLinus Torvalds goto out; 41491da177e4SLinus Torvalds } 4150f9d7562fSJ. Bruce Fields if (!filp) { 4151f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4152f9d7562fSJ. Bruce Fields goto out; 4153f9d7562fSJ. Bruce Fields } 4154b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41551da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41561da177e4SLinus Torvalds file_lock.fl_file = filp; 41571da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4158d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41591da177e4SLinus Torvalds 41601da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 416187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41621da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41631da177e4SLinus Torvalds 41641da177e4SLinus Torvalds /* 41651da177e4SLinus Torvalds * Try to lock the file in the VFS. 41661da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41671da177e4SLinus Torvalds */ 41681da177e4SLinus Torvalds 4169529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4170b8dd7b9aSAl Viro switch (-err) { 41711da177e4SLinus Torvalds case 0: /* success! */ 4172dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4173dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41741da177e4SLinus Torvalds sizeof(stateid_t)); 4175b8dd7b9aSAl Viro status = 0; 4176eb76b3fdSAndy Adamson break; 4177eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4178eb76b3fdSAndy Adamson status = nfserr_denied; 4179eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4180eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4181eb76b3fdSAndy Adamson break; 41821da177e4SLinus Torvalds case (EDEADLK): 41831da177e4SLinus Torvalds status = nfserr_deadlock; 4184eb76b3fdSAndy Adamson break; 41851da177e4SLinus Torvalds default: 4186fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41873e772463SJ. Bruce Fields status = nfserrno(err); 4188eb76b3fdSAndy Adamson break; 41891da177e4SLinus Torvalds } 41901da177e4SLinus Torvalds out: 419164a284d0SJ. Bruce Fields if (status && new_state) 4192f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41935ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41941da177e4SLinus Torvalds nfs4_unlock_state(); 41951da177e4SLinus Torvalds return status; 41961da177e4SLinus Torvalds } 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds /* 419955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 420055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 420155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 420255ef1274SJ. Bruce Fields * inode operation.) 420355ef1274SJ. Bruce Fields */ 420455ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 420555ef1274SJ. Bruce Fields { 420655ef1274SJ. Bruce Fields struct file *file; 420755ef1274SJ. Bruce Fields int err; 420855ef1274SJ. Bruce Fields 420955ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 421055ef1274SJ. Bruce Fields if (err) 421155ef1274SJ. Bruce Fields return err; 421255ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 421355ef1274SJ. Bruce Fields nfsd_close(file); 421455ef1274SJ. Bruce Fields return err; 421555ef1274SJ. Bruce Fields } 421655ef1274SJ. Bruce Fields 421755ef1274SJ. Bruce Fields /* 42181da177e4SLinus Torvalds * LOCKT operation 42191da177e4SLinus Torvalds */ 4220b37ad28bSAl Viro __be32 4221ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4222ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42231da177e4SLinus Torvalds { 42241da177e4SLinus Torvalds struct inode *inode; 42251da177e4SLinus Torvalds struct file_lock file_lock; 4226fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4227fd85b817SMarc Eshel int error; 4228b37ad28bSAl Viro __be32 status; 42291da177e4SLinus Torvalds 4230af558e33SJ. Bruce Fields if (locks_in_grace()) 42311da177e4SLinus Torvalds return nfserr_grace; 42321da177e4SLinus Torvalds 42331da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42341da177e4SLinus Torvalds return nfserr_inval; 42351da177e4SLinus Torvalds 42361da177e4SLinus Torvalds nfs4_lock_state(); 42371da177e4SLinus Torvalds 42381da177e4SLinus Torvalds status = nfserr_stale_clientid; 423960adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42401da177e4SLinus Torvalds goto out; 42411da177e4SLinus Torvalds 424275c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42431da177e4SLinus Torvalds goto out; 42441da177e4SLinus Torvalds 4245ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42461da177e4SLinus Torvalds locks_init_lock(&file_lock); 42471da177e4SLinus Torvalds switch (lockt->lt_type) { 42481da177e4SLinus Torvalds case NFS4_READ_LT: 42491da177e4SLinus Torvalds case NFS4_READW_LT: 42501da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42511da177e4SLinus Torvalds break; 42521da177e4SLinus Torvalds case NFS4_WRITE_LT: 42531da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42541da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42551da177e4SLinus Torvalds break; 42561da177e4SLinus Torvalds default: 42572fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42581da177e4SLinus Torvalds status = nfserr_inval; 42591da177e4SLinus Torvalds goto out; 42601da177e4SLinus Torvalds } 42611da177e4SLinus Torvalds 4262fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4263fe0750e5SJ. Bruce Fields if (lo) 4264fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42651da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42661da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42671da177e4SLinus Torvalds 42681da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 426987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42701da177e4SLinus Torvalds 42711da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42721da177e4SLinus Torvalds 42731da177e4SLinus Torvalds status = nfs_ok; 427455ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4275fd85b817SMarc Eshel if (error) { 4276fd85b817SMarc Eshel status = nfserrno(error); 4277fd85b817SMarc Eshel goto out; 4278fd85b817SMarc Eshel } 42799d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42801da177e4SLinus Torvalds status = nfserr_denied; 42819d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42821da177e4SLinus Torvalds } 42831da177e4SLinus Torvalds out: 42841da177e4SLinus Torvalds nfs4_unlock_state(); 42851da177e4SLinus Torvalds return status; 42861da177e4SLinus Torvalds } 42871da177e4SLinus Torvalds 4288b37ad28bSAl Viro __be32 4289ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4290a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42911da177e4SLinus Torvalds { 4292dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42931da177e4SLinus Torvalds struct file *filp = NULL; 42941da177e4SLinus Torvalds struct file_lock file_lock; 4295b37ad28bSAl Viro __be32 status; 4296b8dd7b9aSAl Viro int err; 42971da177e4SLinus Torvalds 42981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42991da177e4SLinus Torvalds (long long) locku->lu_offset, 43001da177e4SLinus Torvalds (long long) locku->lu_length); 43011da177e4SLinus Torvalds 43021da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43031da177e4SLinus Torvalds return nfserr_inval; 43041da177e4SLinus Torvalds 43051da177e4SLinus Torvalds nfs4_lock_state(); 43061da177e4SLinus Torvalds 43079072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43082288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43099072d5c6SJ. Bruce Fields if (status) 43101da177e4SLinus Torvalds goto out; 4311f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4312f9d7562fSJ. Bruce Fields if (!filp) { 4313f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4314f9d7562fSJ. Bruce Fields goto out; 4315f9d7562fSJ. Bruce Fields } 43161da177e4SLinus Torvalds BUG_ON(!filp); 43171da177e4SLinus Torvalds locks_init_lock(&file_lock); 43181da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4319fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43201da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43211da177e4SLinus Torvalds file_lock.fl_file = filp; 43221da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4323d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43241da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43251da177e4SLinus Torvalds 432687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43271da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43281da177e4SLinus Torvalds 43291da177e4SLinus Torvalds /* 43301da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43311da177e4SLinus Torvalds */ 4332fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4333b8dd7b9aSAl Viro if (err) { 4334fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43351da177e4SLinus Torvalds goto out_nfserr; 43361da177e4SLinus Torvalds } 43371da177e4SLinus Torvalds /* 43381da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43391da177e4SLinus Torvalds */ 4340dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4341dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43421da177e4SLinus Torvalds 43431da177e4SLinus Torvalds out: 434471c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43451da177e4SLinus Torvalds nfs4_unlock_state(); 43461da177e4SLinus Torvalds return status; 43471da177e4SLinus Torvalds 43481da177e4SLinus Torvalds out_nfserr: 4349b8dd7b9aSAl Viro status = nfserrno(err); 43501da177e4SLinus Torvalds goto out; 43511da177e4SLinus Torvalds } 43521da177e4SLinus Torvalds 43531da177e4SLinus Torvalds /* 43541da177e4SLinus Torvalds * returns 43551da177e4SLinus Torvalds * 1: locks held by lockowner 43561da177e4SLinus Torvalds * 0: no locks held by lockowner 43571da177e4SLinus Torvalds */ 43581da177e4SLinus Torvalds static int 4359fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43601da177e4SLinus Torvalds { 43611da177e4SLinus Torvalds struct file_lock **flpp; 4362f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43631da177e4SLinus Torvalds int status = 0; 43641da177e4SLinus Torvalds 4365b89f4321SArnd Bergmann lock_flocks(); 43661da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4367796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43681da177e4SLinus Torvalds status = 1; 43691da177e4SLinus Torvalds goto out; 43701da177e4SLinus Torvalds } 4371796dadfdSJ. Bruce Fields } 43721da177e4SLinus Torvalds out: 4373b89f4321SArnd Bergmann unlock_flocks(); 43741da177e4SLinus Torvalds return status; 43751da177e4SLinus Torvalds } 43761da177e4SLinus Torvalds 4377b37ad28bSAl Viro __be32 4378b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4379b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4380b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43811da177e4SLinus Torvalds { 43821da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43833e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4384fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4385dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43861da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43873e9e3dbeSNeilBrown struct list_head matches; 438816bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4389b37ad28bSAl Viro __be32 status; 43901da177e4SLinus Torvalds 43911da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43921da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43931da177e4SLinus Torvalds 43941da177e4SLinus Torvalds /* XXX check for lease expiration */ 43951da177e4SLinus Torvalds 43961da177e4SLinus Torvalds status = nfserr_stale_clientid; 4397849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43981da177e4SLinus Torvalds return status; 43991da177e4SLinus Torvalds 44001da177e4SLinus Torvalds nfs4_lock_state(); 44011da177e4SLinus Torvalds 44021da177e4SLinus Torvalds status = nfserr_locks_held; 44033e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 440406f1f864SJ. Bruce Fields 440516bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 440616bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 440716bfdaafSJ. Bruce Fields continue; 4408599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44093e9e3dbeSNeilBrown continue; 44103e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4411ea1da636SNeilBrown st_perstateowner) { 4412fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4413fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44141da177e4SLinus Torvalds goto out; 4415fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44161da177e4SLinus Torvalds } 44173e9e3dbeSNeilBrown } 44183e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44193e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44203e9e3dbeSNeilBrown * have been checked. */ 44211da177e4SLinus Torvalds status = nfs_ok; 44220fa822e4SNeilBrown while (!list_empty(&matches)) { 4423fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4424fe0750e5SJ. Bruce Fields lo_list); 44250fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44260fa822e4SNeilBrown * for openowners. */ 4427fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4428fe0750e5SJ. Bruce Fields release_lockowner(lo); 44291da177e4SLinus Torvalds } 44301da177e4SLinus Torvalds out: 44311da177e4SLinus Torvalds nfs4_unlock_state(); 44321da177e4SLinus Torvalds return status; 44331da177e4SLinus Torvalds } 44341da177e4SLinus Torvalds 44351da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4436a55370a3SNeilBrown alloc_reclaim(void) 44371da177e4SLinus Torvalds { 4438a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44391da177e4SLinus Torvalds } 44401da177e4SLinus Torvalds 4441c7b9a459SNeilBrown int 4442a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4443c7b9a459SNeilBrown { 4444c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4445c7b9a459SNeilBrown struct nfs4_client *clp; 4446c7b9a459SNeilBrown 4447e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4448393d8ed8SJ. Bruce Fields if (!clp) 4449393d8ed8SJ. Bruce Fields return 0; 4450a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4451c7b9a459SNeilBrown } 4452c7b9a459SNeilBrown 44531da177e4SLinus Torvalds /* 44541da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44551da177e4SLinus Torvalds */ 4456190e4fbfSNeilBrown int 4457190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44581da177e4SLinus Torvalds { 44591da177e4SLinus Torvalds unsigned int strhashval; 44601da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44611da177e4SLinus Torvalds 4462a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4463a55370a3SNeilBrown crp = alloc_reclaim(); 44641da177e4SLinus Torvalds if (!crp) 44651da177e4SLinus Torvalds return 0; 4466a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44671da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44681da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4469a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44701da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44711da177e4SLinus Torvalds return 1; 44721da177e4SLinus Torvalds } 44731da177e4SLinus Torvalds 44742a4317c5SJeff Layton void 44751da177e4SLinus Torvalds nfs4_release_reclaim(void) 44761da177e4SLinus Torvalds { 44771da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44781da177e4SLinus Torvalds int i; 44791da177e4SLinus Torvalds 44801da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44811da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44821da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44831da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44841da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44851da177e4SLinus Torvalds kfree(crp); 44861da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44871da177e4SLinus Torvalds } 44881da177e4SLinus Torvalds } 44891da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44901da177e4SLinus Torvalds } 44911da177e4SLinus Torvalds 44921da177e4SLinus Torvalds /* 44931da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 44942a4317c5SJeff Layton struct nfs4_client_reclaim * 4495a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 44961da177e4SLinus Torvalds { 44971da177e4SLinus Torvalds unsigned int strhashval; 44981da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44991da177e4SLinus Torvalds 4500a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4501a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4502a55370a3SNeilBrown clp->cl_recdir); 45031da177e4SLinus Torvalds 45041da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4505a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45061da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4507a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45081da177e4SLinus Torvalds return crp; 45091da177e4SLinus Torvalds } 45101da177e4SLinus Torvalds } 45111da177e4SLinus Torvalds return NULL; 45121da177e4SLinus Torvalds } 45131da177e4SLinus Torvalds 45141da177e4SLinus Torvalds /* 45151da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45161da177e4SLinus Torvalds */ 4517b37ad28bSAl Viro __be32 45181da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45191da177e4SLinus Torvalds { 4520a52d726bSJeff Layton struct nfs4_client *clp; 4521a52d726bSJeff Layton 4522a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4523a52d726bSJeff Layton clp = find_confirmed_client(clid); 4524a52d726bSJeff Layton if (clp == NULL) 4525a52d726bSJeff Layton return nfserr_reclaim_bad; 4526a52d726bSJeff Layton 4527a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45281da177e4SLinus Torvalds } 45291da177e4SLinus Torvalds 453065178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 453165178db4SBryan Schumaker 453265178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 453365178db4SBryan Schumaker { 453465178db4SBryan Schumaker struct nfs4_client *clp, *next; 453565178db4SBryan Schumaker int count = 0; 453665178db4SBryan Schumaker 453765178db4SBryan Schumaker nfs4_lock_state(); 453865178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45392a4317c5SJeff Layton nfsd4_client_record_remove(clp); 454065178db4SBryan Schumaker expire_client(clp); 454165178db4SBryan Schumaker if (++count == num) 454265178db4SBryan Schumaker break; 454365178db4SBryan Schumaker } 454465178db4SBryan Schumaker nfs4_unlock_state(); 454565178db4SBryan Schumaker 454665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 454765178db4SBryan Schumaker } 454865178db4SBryan Schumaker 454965178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 455065178db4SBryan Schumaker { 455165178db4SBryan Schumaker release_lockowner(lockowner(sop)); 455265178db4SBryan Schumaker } 455365178db4SBryan Schumaker 455465178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 455565178db4SBryan Schumaker { 455665178db4SBryan Schumaker release_openowner(openowner(sop)); 455765178db4SBryan Schumaker } 455865178db4SBryan Schumaker 4559353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 456065178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 456165178db4SBryan Schumaker { 456265178db4SBryan Schumaker int i, count = 0; 456365178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 456465178db4SBryan Schumaker 456516bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 456616bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 456716bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 456816bfdaafSJ. Bruce Fields continue; 456965178db4SBryan Schumaker release_sop(sop); 457065178db4SBryan Schumaker if (++count == num) 457165178db4SBryan Schumaker return count; 457265178db4SBryan Schumaker } 457365178db4SBryan Schumaker } 457465178db4SBryan Schumaker return count; 457565178db4SBryan Schumaker } 457665178db4SBryan Schumaker 457765178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 457865178db4SBryan Schumaker { 457965178db4SBryan Schumaker int count; 458065178db4SBryan Schumaker 458165178db4SBryan Schumaker nfs4_lock_state(); 458216bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 458365178db4SBryan Schumaker nfs4_unlock_state(); 458465178db4SBryan Schumaker 458565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 458665178db4SBryan Schumaker } 458765178db4SBryan Schumaker 458865178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 458965178db4SBryan Schumaker { 459065178db4SBryan Schumaker int count; 459165178db4SBryan Schumaker 459265178db4SBryan Schumaker nfs4_lock_state(); 459316bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 459465178db4SBryan Schumaker nfs4_unlock_state(); 459565178db4SBryan Schumaker 459665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 459765178db4SBryan Schumaker } 459865178db4SBryan Schumaker 459965178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 460065178db4SBryan Schumaker { 460165178db4SBryan Schumaker int i, count = 0; 46022d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46032d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 460465178db4SBryan Schumaker 460565178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46062d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46072d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 460865178db4SBryan Schumaker deleg_func(dp); 460965178db4SBryan Schumaker if (++count == num) 461065178db4SBryan Schumaker return count; 461165178db4SBryan Schumaker } 461265178db4SBryan Schumaker } 461365178db4SBryan Schumaker } 46142d3475c0SBryan Schumaker 461565178db4SBryan Schumaker return count; 461665178db4SBryan Schumaker } 461765178db4SBryan Schumaker 461865178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 461965178db4SBryan Schumaker { 462065178db4SBryan Schumaker unsigned int count; 462165178db4SBryan Schumaker 462265178db4SBryan Schumaker nfs4_lock_state(); 462365178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 462465178db4SBryan Schumaker nfs4_unlock_state(); 462565178db4SBryan Schumaker 462665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 462765178db4SBryan Schumaker } 462865178db4SBryan Schumaker 462965178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 463065178db4SBryan Schumaker { 463165178db4SBryan Schumaker unsigned int count; 463265178db4SBryan Schumaker 463365178db4SBryan Schumaker nfs4_lock_state(); 463465178db4SBryan Schumaker spin_lock(&recall_lock); 463565178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 463665178db4SBryan Schumaker spin_unlock(&recall_lock); 463765178db4SBryan Schumaker nfs4_unlock_state(); 463865178db4SBryan Schumaker 463965178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 464065178db4SBryan Schumaker } 464165178db4SBryan Schumaker 464265178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 464365178db4SBryan Schumaker 4644ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46451da177e4SLinus Torvalds 464672083396SBryan Schumaker void 4647ac4d8ff2SNeilBrown nfs4_state_init(void) 46481da177e4SLinus Torvalds { 464972083396SBryan Schumaker int i; 46501da177e4SLinus Torvalds 46511da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46521da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46531da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46541da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46551da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 465602cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46571da177e4SLinus Torvalds } 46585282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46595282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46601da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46611da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46621da177e4SLinus Torvalds } 466316bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 466416bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46651da177e4SLinus Torvalds } 4666009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4667009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46681da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46691da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46701da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4671ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4672ac4d8ff2SNeilBrown } 4673ac4d8ff2SNeilBrown 4674c2f1a551SMeelap Shah /* 4675c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4676c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4677c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4678c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4679c2f1a551SMeelap Shah * 4680c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4681c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4682c2f1a551SMeelap Shah */ 4683c2f1a551SMeelap Shah static void 4684c2f1a551SMeelap Shah set_max_delegations(void) 4685c2f1a551SMeelap Shah { 4686c2f1a551SMeelap Shah /* 4687c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4688c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4689c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4690c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4691c2f1a551SMeelap Shah */ 4692c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4693c2f1a551SMeelap Shah } 4694c2f1a551SMeelap Shah 4695ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4696ac4d8ff2SNeilBrown 4697a6d6b781SJeff Layton int 4698a6d6b781SJeff Layton nfs4_state_start(void) 4699ac4d8ff2SNeilBrown { 4700b5a1a81eSJ. Bruce Fields int ret; 4701b5a1a81eSJ. Bruce Fields 47022a4317c5SJeff Layton /* 47032a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47042a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47052a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47062a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47072a4317c5SJeff Layton * basis. 47082a4317c5SJeff Layton */ 47092a4317c5SJeff Layton get_net(&init_net); 47102a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 47111da177e4SLinus Torvalds boot_time = get_seconds(); 4712af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 471333dcc481SJeff Layton grace_ended = false; 47149a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4715e46b498cSJ. Bruce Fields nfsd4_grace); 4716b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4717a6d6b781SJeff Layton if (ret) { 4718a6d6b781SJeff Layton ret = -ENOMEM; 4719a6d6b781SJeff Layton goto out_recovery; 4720a6d6b781SJeff Layton } 472158da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4722a6d6b781SJeff Layton if (laundry_wq == NULL) { 4723a6d6b781SJeff Layton ret = -ENOMEM; 4724a6d6b781SJeff Layton goto out_recovery; 4725a6d6b781SJeff Layton } 4726b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4727b5a1a81eSJ. Bruce Fields if (ret) 4728b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4729e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4730c2f1a551SMeelap Shah set_max_delegations(); 4731b5a1a81eSJ. Bruce Fields return 0; 4732b5a1a81eSJ. Bruce Fields out_free_laundry: 4733b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4734a6d6b781SJeff Layton out_recovery: 47352a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47362a4317c5SJeff Layton put_net(&init_net); 4737b5a1a81eSJ. Bruce Fields return ret; 47381da177e4SLinus Torvalds } 47391da177e4SLinus Torvalds 47401da177e4SLinus Torvalds static void 47411da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47421da177e4SLinus Torvalds { 47431da177e4SLinus Torvalds int i; 47441da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47451da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47461da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47471da177e4SLinus Torvalds 47481da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47491da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47501da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47511da177e4SLinus Torvalds expire_client(clp); 47521da177e4SLinus Torvalds } 47531da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47541da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47551da177e4SLinus Torvalds expire_client(clp); 47561da177e4SLinus Torvalds } 47571da177e4SLinus Torvalds } 47581da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47591da177e4SLinus Torvalds spin_lock(&recall_lock); 47601da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47611da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47621da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47631da177e4SLinus Torvalds } 47641da177e4SLinus Torvalds spin_unlock(&recall_lock); 47651da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47661da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47671da177e4SLinus Torvalds unhash_delegation(dp); 47681da177e4SLinus Torvalds } 47691da177e4SLinus Torvalds 47702a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47712a4317c5SJeff Layton put_net(&init_net); 47721da177e4SLinus Torvalds } 47731da177e4SLinus Torvalds 47741da177e4SLinus Torvalds void 47751da177e4SLinus Torvalds nfs4_state_shutdown(void) 47761da177e4SLinus Torvalds { 4777afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47785e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47792c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 47801da177e4SLinus Torvalds nfs4_lock_state(); 47811da177e4SLinus Torvalds __nfs4_state_shutdown(); 47821da177e4SLinus Torvalds nfs4_unlock_state(); 4783c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47841da177e4SLinus Torvalds } 47858b70484cSTigran Mkrtchyan 47868b70484cSTigran Mkrtchyan static void 47878b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47888b70484cSTigran Mkrtchyan { 478937c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 479037c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47918b70484cSTigran Mkrtchyan } 47928b70484cSTigran Mkrtchyan 47938b70484cSTigran Mkrtchyan static void 47948b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47958b70484cSTigran Mkrtchyan { 479637c593c5STigran Mkrtchyan if (cstate->minorversion) { 479737c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 479837c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 479937c593c5STigran Mkrtchyan } 480037c593c5STigran Mkrtchyan } 480137c593c5STigran Mkrtchyan 480237c593c5STigran Mkrtchyan void 480337c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 480437c593c5STigran Mkrtchyan { 480537c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48068b70484cSTigran Mkrtchyan } 48078b70484cSTigran Mkrtchyan 480862cd4a59STigran Mkrtchyan /* 480962cd4a59STigran Mkrtchyan * functions to set current state id 481062cd4a59STigran Mkrtchyan */ 48118b70484cSTigran Mkrtchyan void 48129428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48139428fe1aSTigran Mkrtchyan { 48149428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48159428fe1aSTigran Mkrtchyan } 48169428fe1aSTigran Mkrtchyan 48179428fe1aSTigran Mkrtchyan void 48188b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48198b70484cSTigran Mkrtchyan { 48208b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48218b70484cSTigran Mkrtchyan } 48228b70484cSTigran Mkrtchyan 48238b70484cSTigran Mkrtchyan void 482462cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 482562cd4a59STigran Mkrtchyan { 482662cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 482762cd4a59STigran Mkrtchyan } 482862cd4a59STigran Mkrtchyan 482962cd4a59STigran Mkrtchyan void 483062cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 483162cd4a59STigran Mkrtchyan { 483262cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 483362cd4a59STigran Mkrtchyan } 483462cd4a59STigran Mkrtchyan 483562cd4a59STigran Mkrtchyan /* 483662cd4a59STigran Mkrtchyan * functions to consume current state id 483762cd4a59STigran Mkrtchyan */ 48381e97b519STigran Mkrtchyan 48391e97b519STigran Mkrtchyan void 48409428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48419428fe1aSTigran Mkrtchyan { 48429428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48439428fe1aSTigran Mkrtchyan } 48449428fe1aSTigran Mkrtchyan 48459428fe1aSTigran Mkrtchyan void 48469428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48479428fe1aSTigran Mkrtchyan { 48489428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48499428fe1aSTigran Mkrtchyan } 48509428fe1aSTigran Mkrtchyan 48519428fe1aSTigran Mkrtchyan void 48521e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48531e97b519STigran Mkrtchyan { 48541e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48551e97b519STigran Mkrtchyan } 48561e97b519STigran Mkrtchyan 48571e97b519STigran Mkrtchyan void 48581e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48591e97b519STigran Mkrtchyan { 48601e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48611e97b519STigran Mkrtchyan } 48621e97b519STigran Mkrtchyan 486362cd4a59STigran Mkrtchyan void 48648b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48658b70484cSTigran Mkrtchyan { 48668b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48678b70484cSTigran Mkrtchyan } 48688b70484cSTigran Mkrtchyan 48698b70484cSTigran Mkrtchyan void 487062cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48718b70484cSTigran Mkrtchyan { 487262cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48738b70484cSTigran Mkrtchyan } 487430813e27STigran Mkrtchyan 487530813e27STigran Mkrtchyan void 487630813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 487730813e27STigran Mkrtchyan { 487830813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 487930813e27STigran Mkrtchyan } 488030813e27STigran Mkrtchyan 488130813e27STigran Mkrtchyan void 488230813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 488330813e27STigran Mkrtchyan { 488430813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 488530813e27STigran Mkrtchyan } 4886