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 474f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 475f9d7562fSJ. Bruce Fields { 4768f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 477f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 478f9d7562fSJ. Bruce Fields return O_RDONLY; 479f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 480f9d7562fSJ. Bruce Fields return O_WRONLY; 481f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 482f9d7562fSJ. Bruce Fields return O_RDWR; 483f9d7562fSJ. Bruce Fields } 484f9d7562fSJ. Bruce Fields BUG(); 485f9d7562fSJ. Bruce Fields } 486f9d7562fSJ. Bruce Fields 487dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 488529d7b2aSJ. Bruce Fields { 489529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 490529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 491529d7b2aSJ. Bruce Fields } 492529d7b2aSJ. Bruce Fields 493dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 494529d7b2aSJ. Bruce Fields { 495499f3edcSJ. Bruce Fields int i; 4960997b173SJ. Bruce Fields 49723fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 498499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 499499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 500499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 501499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 5024665e2baSJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 503499f3edcSJ. Bruce Fields } 50423fcf2ecSJ. Bruce Fields } 505a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5064665e2baSJ. Bruce Fields stp->st_file = NULL; 5074665e2baSJ. Bruce Fields } 5084665e2baSJ. Bruce Fields 509dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5104665e2baSJ. Bruce Fields { 511529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 512529d7b2aSJ. Bruce Fields } 513529d7b2aSJ. Bruce Fields 514dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 515529d7b2aSJ. Bruce Fields { 516529d7b2aSJ. Bruce Fields struct file *file; 517529d7b2aSJ. Bruce Fields 518529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5196136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 520529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 521529d7b2aSJ. Bruce Fields if (file) 522fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 52338c387b5SJ. Bruce Fields close_generic_stateid(stp); 524529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 525529d7b2aSJ. Bruce Fields } 526529d7b2aSJ. Bruce Fields 527fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 528529d7b2aSJ. Bruce Fields { 529dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 530529d7b2aSJ. Bruce Fields 531fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 532fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 533009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 534fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 535fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 536dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 537529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 538529d7b2aSJ. Bruce Fields } 539529d7b2aSJ. Bruce Fields } 540529d7b2aSJ. Bruce Fields 541fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 542529d7b2aSJ. Bruce Fields { 543fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 544fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 545529d7b2aSJ. Bruce Fields } 546529d7b2aSJ. Bruce Fields 547529d7b2aSJ. Bruce Fields static void 548dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 549529d7b2aSJ. Bruce Fields { 550fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 551529d7b2aSJ. Bruce Fields 552529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 553fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 554fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 555fe0750e5SJ. Bruce Fields release_lockowner(lo); 556529d7b2aSJ. Bruce Fields } 557529d7b2aSJ. Bruce Fields } 558529d7b2aSJ. Bruce Fields 55938c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5602283963fSJ. Bruce Fields { 5612283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5622283963fSJ. Bruce Fields release_stateid_lockowners(stp); 56338c387b5SJ. Bruce Fields close_generic_stateid(stp); 56438c387b5SJ. Bruce Fields } 56538c387b5SJ. Bruce Fields 56638c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 56738c387b5SJ. Bruce Fields { 56838c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5696136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 5702283963fSJ. Bruce Fields free_generic_stateid(stp); 5712283963fSJ. Bruce Fields } 5722283963fSJ. Bruce Fields 573fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 574f1d110caSJ. Bruce Fields { 575dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 576f1d110caSJ. Bruce Fields 577fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 578fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 579fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 580fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 581dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 582f1d110caSJ. Bruce Fields release_open_stateid(stp); 583f1d110caSJ. Bruce Fields } 584f1d110caSJ. Bruce Fields } 585f1d110caSJ. Bruce Fields 586f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 587f7a4d872SJ. Bruce Fields { 588f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 589f7a4d872SJ. Bruce Fields 590f7a4d872SJ. Bruce Fields if (s) { 5916136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 592f7a4d872SJ. Bruce Fields free_generic_stateid(s); 593f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 594f7a4d872SJ. Bruce Fields } 595f7a4d872SJ. Bruce Fields } 596f7a4d872SJ. Bruce Fields 597fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 598f1d110caSJ. Bruce Fields { 599fe0750e5SJ. Bruce Fields unhash_openowner(oo); 600fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 601f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 602fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 603f1d110caSJ. Bruce Fields } 604f1d110caSJ. Bruce Fields 6055282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6065282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6075282fd72SMarc Eshel 6085282fd72SMarc Eshel static inline int 6095282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6105282fd72SMarc Eshel { 6115282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6125282fd72SMarc Eshel 6135282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6145282fd72SMarc Eshel } 6155282fd72SMarc Eshel 6168f199b82STrond Myklebust #ifdef NFSD_DEBUG 6175282fd72SMarc Eshel static inline void 6185282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6195282fd72SMarc Eshel { 6205282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6215282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6225282fd72SMarc Eshel } 6238f199b82STrond Myklebust #else 6248f199b82STrond Myklebust static inline void 6258f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6268f199b82STrond Myklebust { 6278f199b82STrond Myklebust } 6288f199b82STrond Myklebust #endif 6298f199b82STrond Myklebust 6305282fd72SMarc Eshel 631ec6b5d7bSAndy Adamson static void 632ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 633ec6b5d7bSAndy Adamson { 634ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 635ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 636ec6b5d7bSAndy Adamson 637ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 638ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 639ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 640ec6b5d7bSAndy Adamson sid->reserved = 0; 641ec6b5d7bSAndy Adamson } 642ec6b5d7bSAndy Adamson 643ec6b5d7bSAndy Adamson /* 644a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 645a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 646a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 647a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 648a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 649a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 650a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 651a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 652a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 653a649637cSAndy Adamson * for the SEQUENCE op response: 654ec6b5d7bSAndy Adamson */ 655a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 656a649637cSAndy Adamson 657557ce264SAndy Adamson static void 658557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 659557ce264SAndy Adamson { 660557ce264SAndy Adamson int i; 661557ce264SAndy Adamson 662557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 663557ce264SAndy Adamson kfree(ses->se_slots[i]); 664557ce264SAndy Adamson } 665557ce264SAndy Adamson 666efe0cb6dSJ. Bruce Fields /* 667efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 668efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 669efe0cb6dSJ. Bruce Fields */ 670efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 671efe0cb6dSJ. Bruce Fields { 672efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 673efe0cb6dSJ. Bruce Fields } 674efe0cb6dSJ. Bruce Fields 6755b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 676ec6b5d7bSAndy Adamson { 6775b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 6785b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 679ec6b5d7bSAndy Adamson 6805b6feee9SJ. Bruce Fields return size; 681557ce264SAndy Adamson } 682557ce264SAndy Adamson 6835b6feee9SJ. Bruce Fields /* 6845b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 6855b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 68642b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 6875b6feee9SJ. Bruce Fields */ 6885b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 6895b6feee9SJ. Bruce Fields { 6905b6feee9SJ. Bruce Fields int avail; 6915b6feee9SJ. Bruce Fields 6925b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 6935b6feee9SJ. Bruce Fields 6945b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6955b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 6965b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 6975b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 6985b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 6995b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7005b6feee9SJ. Bruce Fields 7015b6feee9SJ. Bruce Fields return num; 7025b6feee9SJ. Bruce Fields } 7035b6feee9SJ. Bruce Fields 7045b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7055b6feee9SJ. Bruce Fields { 7065b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7075b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7085b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7095b6feee9SJ. Bruce Fields } 7105b6feee9SJ. Bruce Fields 7115b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7125b6feee9SJ. Bruce Fields { 7135b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7145b6feee9SJ. Bruce Fields int mem, i; 715ec6b5d7bSAndy Adamson 716c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 717ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7185b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 719ec6b5d7bSAndy Adamson 7205b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7216c18ba9fSAlexandros Batsakis if (!new) 7225b6feee9SJ. Bruce Fields return NULL; 723ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7245b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7255b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7265b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7275b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 728ec6b5d7bSAndy Adamson goto out_free; 729ec6b5d7bSAndy Adamson } 7305b6feee9SJ. Bruce Fields return new; 7315b6feee9SJ. Bruce Fields out_free: 7325b6feee9SJ. Bruce Fields while (i--) 7335b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7345b6feee9SJ. Bruce Fields kfree(new); 7355b6feee9SJ. Bruce Fields return NULL; 7365b6feee9SJ. Bruce Fields } 7375b6feee9SJ. Bruce Fields 7385b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7395b6feee9SJ. Bruce Fields { 7405b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7415b6feee9SJ. Bruce Fields 7425b6feee9SJ. Bruce Fields new->maxreqs = numslots; 743d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 744d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7455b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7465b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7475b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7485b6feee9SJ. Bruce Fields } 7495b6feee9SJ. Bruce Fields 75019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 75119cf5c02SJ. Bruce Fields { 75219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 75319cf5c02SJ. Bruce Fields kfree(c); 75419cf5c02SJ. Bruce Fields } 75519cf5c02SJ. Bruce Fields 75619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 75719cf5c02SJ. Bruce Fields { 75819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 75919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 76019cf5c02SJ. Bruce Fields 76119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 76219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 76319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 76419cf5c02SJ. Bruce Fields free_conn(c); 76519cf5c02SJ. Bruce Fields } 76619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 767eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 76819cf5c02SJ. Bruce Fields } 76919cf5c02SJ. Bruce Fields 770d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 771c7662518SJ. Bruce Fields { 772c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 773c7662518SJ. Bruce Fields 774c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 775c7662518SJ. Bruce Fields if (!conn) 776db90681dSJ. Bruce Fields return NULL; 777c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 778c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 779d29c374cSJ. Bruce Fields conn->cn_flags = flags; 780db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 781db90681dSJ. Bruce Fields return conn; 782db90681dSJ. Bruce Fields } 783db90681dSJ. Bruce Fields 784328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 785328ead28SJ. Bruce Fields { 786328ead28SJ. Bruce Fields conn->cn_session = ses; 787328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 788328ead28SJ. Bruce Fields } 789328ead28SJ. Bruce Fields 790db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 791db90681dSJ. Bruce Fields { 792db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 793c7662518SJ. Bruce Fields 794c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 795328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 796c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 797db90681dSJ. Bruce Fields } 798c7662518SJ. Bruce Fields 79921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 800db90681dSJ. Bruce Fields { 80119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 80221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 803db90681dSJ. Bruce Fields } 804db90681dSJ. Bruce Fields 8051d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 806db90681dSJ. Bruce Fields { 807db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 80821b75b01SJ. Bruce Fields int ret; 809db90681dSJ. Bruce Fields 8101d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 811db90681dSJ. Bruce Fields if (!conn) 812db90681dSJ. Bruce Fields return nfserr_jukebox; 813db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 81421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 81521b75b01SJ. Bruce Fields if (ret) 81621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 81721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 818c7662518SJ. Bruce Fields return nfs_ok; 819c7662518SJ. Bruce Fields } 820c7662518SJ. Bruce Fields 8211d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8221d1bc8f2SJ. Bruce Fields { 8231d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8241d1bc8f2SJ. Bruce Fields 8251d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8261d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8271d1bc8f2SJ. Bruce Fields 8281d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8291d1bc8f2SJ. Bruce Fields } 8301d1bc8f2SJ. Bruce Fields 8311d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 83219cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 833c7662518SJ. Bruce Fields { 83419cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 83519cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 83619cf5c02SJ. Bruce Fields 83719cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 83819cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 83919cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 84019cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 84119cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 84219cf5c02SJ. Bruce Fields 84319cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 84419cf5c02SJ. Bruce Fields free_conn(c); 84519cf5c02SJ. Bruce Fields 84619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 84719cf5c02SJ. Bruce Fields } 84819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 849c7662518SJ. Bruce Fields } 850c7662518SJ. Bruce Fields 851508dc6e1SBenny Halevy static void free_session(struct kref *kref) 852c7662518SJ. Bruce Fields { 853c7662518SJ. Bruce Fields struct nfsd4_session *ses; 854c7662518SJ. Bruce Fields int mem; 855c7662518SJ. Bruce Fields 856508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 857c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 85819cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 859c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 860c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 861c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 862c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 863c7662518SJ. Bruce Fields free_session_slots(ses); 864c7662518SJ. Bruce Fields kfree(ses); 865c7662518SJ. Bruce Fields } 866c7662518SJ. Bruce Fields 867508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 868508dc6e1SBenny Halevy { 869508dc6e1SBenny Halevy spin_lock(&client_lock); 870508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 871508dc6e1SBenny Halevy spin_unlock(&client_lock); 872508dc6e1SBenny Halevy } 873508dc6e1SBenny Halevy 874ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 8755b6feee9SJ. Bruce Fields { 8765b6feee9SJ. Bruce Fields struct nfsd4_session *new; 8775b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 8785b6feee9SJ. Bruce Fields int numslots, slotsize; 87957b7b43bSJ. Bruce Fields __be32 status; 8805b6feee9SJ. Bruce Fields int idx; 8815b6feee9SJ. Bruce Fields 8825b6feee9SJ. Bruce Fields /* 8835b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 8845b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 8855b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 8865b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 8875b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 8885b6feee9SJ. Bruce Fields */ 8895b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 8905b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 891ced6dfe9SMi Jinlong if (numslots < 1) 892ced6dfe9SMi Jinlong return NULL; 8935b6feee9SJ. Bruce Fields 8945b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 8955b6feee9SJ. Bruce Fields if (!new) { 8965b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 897ac7c46f2SJ. Bruce Fields return NULL; 8985b6feee9SJ. Bruce Fields } 8995b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 900ec6b5d7bSAndy Adamson 901ec6b5d7bSAndy Adamson new->se_client = clp; 902ec6b5d7bSAndy Adamson gen_sessionid(new); 903ec6b5d7bSAndy Adamson 904c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 905c7662518SJ. Bruce Fields 906ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 907ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9088b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 909ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9105b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9119089f1b4SBenny Halevy spin_lock(&client_lock); 912ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9134c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 914ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9154c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9169089f1b4SBenny Halevy spin_unlock(&client_lock); 917ec6b5d7bSAndy Adamson 9181d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 919ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 920c7662518SJ. Bruce Fields if (status) { 921508dc6e1SBenny Halevy spin_lock(&client_lock); 922c7662518SJ. Bruce Fields free_session(&new->se_ref); 923508dc6e1SBenny Halevy spin_unlock(&client_lock); 924ac7c46f2SJ. Bruce Fields return NULL; 925c7662518SJ. Bruce Fields } 926dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 927edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 928dcbeaa68SJ. Bruce Fields /* 929dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 930dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 931dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 932dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 933dcbeaa68SJ. Bruce Fields * future: 934dcbeaa68SJ. Bruce Fields */ 935edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 936edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 937edd76786SJ. Bruce Fields } 938dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 939ac7c46f2SJ. Bruce Fields return new; 940ec6b5d7bSAndy Adamson } 941ec6b5d7bSAndy Adamson 9429089f1b4SBenny Halevy /* caller must hold client_lock */ 9435282fd72SMarc Eshel static struct nfsd4_session * 9445282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9455282fd72SMarc Eshel { 9465282fd72SMarc Eshel struct nfsd4_session *elem; 9475282fd72SMarc Eshel int idx; 9485282fd72SMarc Eshel 9495282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9505282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9515282fd72SMarc Eshel /* Search in the appropriate list */ 9525282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9535282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9545282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9555282fd72SMarc Eshel return elem; 9565282fd72SMarc Eshel } 9575282fd72SMarc Eshel } 9585282fd72SMarc Eshel 9595282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9605282fd72SMarc Eshel return NULL; 9615282fd72SMarc Eshel } 9625282fd72SMarc Eshel 9639089f1b4SBenny Halevy /* caller must hold client_lock */ 9647116ed6bSAndy Adamson static void 9655282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9667116ed6bSAndy Adamson { 9677116ed6bSAndy Adamson list_del(&ses->se_hash); 9684c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9697116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9704c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9715282fd72SMarc Eshel } 9725282fd72SMarc Eshel 97336acb66bSBenny Halevy /* must be called under the client_lock */ 9741da177e4SLinus Torvalds static inline void 97536acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9761da177e4SLinus Torvalds { 97707cd4909SBenny Halevy if (is_client_expired(clp)) { 97807cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 97907cd4909SBenny Halevy __func__, 98007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 98107cd4909SBenny Halevy clp->cl_clientid.cl_id); 98207cd4909SBenny Halevy return; 98307cd4909SBenny Halevy } 98407cd4909SBenny Halevy 9851da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 9861da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 9871da177e4SLinus Torvalds clp->cl_clientid.cl_id); 9881da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 9891da177e4SLinus Torvalds clp->cl_time = get_seconds(); 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds 99236acb66bSBenny Halevy static inline void 99336acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 99436acb66bSBenny Halevy { 99536acb66bSBenny Halevy spin_lock(&client_lock); 99636acb66bSBenny Halevy renew_client_locked(clp); 99736acb66bSBenny Halevy spin_unlock(&client_lock); 99836acb66bSBenny Halevy } 99936acb66bSBenny Halevy 10001da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10011da177e4SLinus Torvalds static int 10021da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10031da177e4SLinus Torvalds { 10041da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10051da177e4SLinus Torvalds return 0; 100660adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 100760adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10081da177e4SLinus Torvalds return 1; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds 10111da177e4SLinus Torvalds /* 10121da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10131da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10141da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10151da177e4SLinus Torvalds */ 101635bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10171da177e4SLinus Torvalds { 10181da177e4SLinus Torvalds struct nfs4_client *clp; 10191da177e4SLinus Torvalds 102035bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 102135bba9a3SJ. Bruce Fields if (clp == NULL) 102235bba9a3SJ. Bruce Fields return NULL; 102367114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 102435bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 102535bba9a3SJ. Bruce Fields kfree(clp); 102635bba9a3SJ. Bruce Fields return NULL; 102735bba9a3SJ. Bruce Fields } 10281da177e4SLinus Torvalds clp->cl_name.len = name.len; 10291da177e4SLinus Torvalds return clp; 10301da177e4SLinus Torvalds } 10311da177e4SLinus Torvalds 10321da177e4SLinus Torvalds static inline void 10331da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10341da177e4SLinus Torvalds { 1035508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 1036792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1037792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1038792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1039792c95ddSJ. Bruce Fields se_perclnt); 1040792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1041508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1042792c95ddSJ. Bruce Fields } 10431da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 10441da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 104568e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 10461da177e4SLinus Torvalds kfree(clp->cl_name.data); 10471da177e4SLinus Torvalds kfree(clp); 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 1050d7682988SBenny Halevy void 1051d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1052d7682988SBenny Halevy { 1053d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1054d7682988SBenny Halevy 1055d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1056d7682988SBenny Halevy return; 1057d7682988SBenny Halevy if (is_client_expired(clp)) { 1058d7682988SBenny Halevy free_client(clp); 1059d7682988SBenny Halevy session->se_client = NULL; 1060d7682988SBenny Halevy } else 1061d7682988SBenny Halevy renew_client_locked(clp); 1062d7682988SBenny Halevy spin_unlock(&client_lock); 1063d7682988SBenny Halevy } 1064d7682988SBenny Halevy 106584d38ac9SBenny Halevy /* must be called under the client_lock */ 106684d38ac9SBenny Halevy static inline void 106784d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 106884d38ac9SBenny Halevy { 1069792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1070792c95ddSJ. Bruce Fields 107107cd4909SBenny Halevy mark_client_expired(clp); 107284d38ac9SBenny Halevy list_del(&clp->cl_lru); 10734c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1074792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1075792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10764c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 107784d38ac9SBenny Halevy } 107884d38ac9SBenny Halevy 10791da177e4SLinus Torvalds static void 10801da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 10811da177e4SLinus Torvalds { 1082fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 10831da177e4SLinus Torvalds struct nfs4_delegation *dp; 10841da177e4SLinus Torvalds struct list_head reaplist; 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 10871da177e4SLinus Torvalds spin_lock(&recall_lock); 1088ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1089ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1090ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 10911da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 10921da177e4SLinus Torvalds } 10931da177e4SLinus Torvalds spin_unlock(&recall_lock); 10941da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 10951da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 10961da177e4SLinus Torvalds unhash_delegation(dp); 10971da177e4SLinus Torvalds } 1098ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1099fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1100fe0750e5SJ. Bruce Fields release_openowner(oo); 11011da177e4SLinus Torvalds } 11026ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11032bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11042bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 110584d38ac9SBenny Halevy list_del(&clp->cl_idhash); 110684d38ac9SBenny Halevy list_del(&clp->cl_strhash); 110784d38ac9SBenny Halevy spin_lock(&client_lock); 110884d38ac9SBenny Halevy unhash_client_locked(clp); 110946583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1110b12a05cbSJ. Bruce Fields free_client(clp); 111146583e25SBenny Halevy spin_unlock(&client_lock); 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds 111435bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 111535bba9a3SJ. Bruce Fields { 111635bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 111735bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 112035bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 112135bba9a3SJ. Bruce Fields { 11221da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11231da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 112635bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 112735bba9a3SJ. Bruce Fields { 11281da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11291da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11301da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11311da177e4SLinus Torvalds get_group_info(target->cr_group_info); 11321da177e4SLinus Torvalds } 11331da177e4SLinus Torvalds 113435bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1135599e0a22SJ. Bruce Fields { 1136a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds static int 1140599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1141599e0a22SJ. Bruce Fields { 1142599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11431da177e4SLinus Torvalds } 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds static int 1146599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1147599e0a22SJ. Bruce Fields { 1148599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11491da177e4SLinus Torvalds } 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds /* XXX what about NGROUP */ 11521da177e4SLinus Torvalds static int 1153599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1154599e0a22SJ. Bruce Fields { 1155599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 11561da177e4SLinus Torvalds } 11571da177e4SLinus Torvalds 11585ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 11595ec7b46cSJ. Bruce Fields { 11605ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 11615ec7b46cSJ. Bruce Fields 11621da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 11631da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 1166deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1167deda2faaSJ. Bruce Fields { 1168ab4684d1SChuck Lever __be32 verf[2]; 1169deda2faaSJ. Bruce Fields static u32 i; 11701da177e4SLinus Torvalds 1171ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1172ab4684d1SChuck Lever verf[1] = (__be32)i++; 1173ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 117638c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 11774581d140SJ. Bruce Fields { 117838c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 11794581d140SJ. Bruce Fields } 11804d71ab87SJ. Bruce Fields 118138c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1182f459e453SJ. Bruce Fields { 1183f459e453SJ. Bruce Fields struct nfs4_stid *s; 1184f459e453SJ. Bruce Fields 118538c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1186f459e453SJ. Bruce Fields if (!s) 1187f459e453SJ. Bruce Fields return NULL; 1188f459e453SJ. Bruce Fields if (typemask & s->sc_type) 11894d71ab87SJ. Bruce Fields return s; 11904581d140SJ. Bruce Fields return NULL; 11914581d140SJ. Bruce Fields } 11924581d140SJ. Bruce Fields 1193b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1194b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1195b09333c4SRicardo Labiaga { 1196b09333c4SRicardo Labiaga struct nfs4_client *clp; 1197b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1198b09333c4SRicardo Labiaga char *princ; 1199b09333c4SRicardo Labiaga 1200b09333c4SRicardo Labiaga clp = alloc_client(name); 1201b09333c4SRicardo Labiaga if (clp == NULL) 1202b09333c4SRicardo Labiaga return NULL; 1203b09333c4SRicardo Labiaga 1204792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1205792c95ddSJ. Bruce Fields 1206b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1207b09333c4SRicardo Labiaga if (princ) { 1208b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1209b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1210508dc6e1SBenny Halevy spin_lock(&client_lock); 1211b09333c4SRicardo Labiaga free_client(clp); 1212508dc6e1SBenny Halevy spin_unlock(&client_lock); 1213b09333c4SRicardo Labiaga return NULL; 1214b09333c4SRicardo Labiaga } 1215b09333c4SRicardo Labiaga } 1216b09333c4SRicardo Labiaga 121738c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1218b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 121946583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 122077a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1221b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1222b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1223b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1224b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1225b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12265ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12276ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1228cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 122907cd4909SBenny Halevy clp->cl_time = get_seconds(); 1230b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1231b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1232b09333c4SRicardo Labiaga copy_verf(clp, verf); 1233b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1234b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1235b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1236b09333c4SRicardo Labiaga gen_confirm(clp); 1237edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1238b09333c4SRicardo Labiaga return clp; 1239b09333c4SRicardo Labiaga } 1240b09333c4SRicardo Labiaga 1241fd39ca9aSNeilBrown static void 12421da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 12431da177e4SLinus Torvalds { 12441da177e4SLinus Torvalds unsigned int idhashval; 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 12471da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12481da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 124936acb66bSBenny Halevy renew_client(clp); 12501da177e4SLinus Torvalds } 12511da177e4SLinus Torvalds 1252fd39ca9aSNeilBrown static void 12531da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 12541da177e4SLinus Torvalds { 12551da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12561da177e4SLinus Torvalds unsigned int strhashval; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1259f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1260a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1261328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 12621da177e4SLinus Torvalds renew_client(clp); 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds static struct nfs4_client * 12661da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 12671da177e4SLinus Torvalds { 12681da177e4SLinus Torvalds struct nfs4_client *clp; 12691da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1272a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1273a50d2ad1SJ. Bruce Fields renew_client(clp); 12741da177e4SLinus Torvalds return clp; 12751da177e4SLinus Torvalds } 1276a50d2ad1SJ. Bruce Fields } 12771da177e4SLinus Torvalds return NULL; 12781da177e4SLinus Torvalds } 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds static struct nfs4_client * 12811da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds struct nfs4_client *clp; 12841da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1287599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 12881da177e4SLinus Torvalds return clp; 12891da177e4SLinus Torvalds } 12901da177e4SLinus Torvalds return NULL; 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds 12936e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1294a1bcecd2SAndy Adamson { 12956e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1296a1bcecd2SAndy Adamson } 1297a1bcecd2SAndy Adamson 129828ce6054SNeilBrown static struct nfs4_client * 1299e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 130028ce6054SNeilBrown { 130128ce6054SNeilBrown struct nfs4_client *clp; 130228ce6054SNeilBrown 130328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1304e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 130528ce6054SNeilBrown return clp; 130628ce6054SNeilBrown } 130728ce6054SNeilBrown return NULL; 130828ce6054SNeilBrown } 130928ce6054SNeilBrown 131028ce6054SNeilBrown static struct nfs4_client * 1311e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 131228ce6054SNeilBrown { 131328ce6054SNeilBrown struct nfs4_client *clp; 131428ce6054SNeilBrown 131528ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1316e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 131728ce6054SNeilBrown return clp; 131828ce6054SNeilBrown } 131928ce6054SNeilBrown return NULL; 132028ce6054SNeilBrown } 132128ce6054SNeilBrown 1322fd39ca9aSNeilBrown static void 13236f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13241da177e4SLinus Torvalds { 132507263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13266f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13276f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13287077ecbaSJeff Layton unsigned short expected_family; 13291da177e4SLinus Torvalds 13307077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13317077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13327077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 13337077ecbaSJeff Layton expected_family = AF_INET; 13347077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 13357077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 13367077ecbaSJeff Layton expected_family = AF_INET6; 13377077ecbaSJeff Layton else 13381da177e4SLinus Torvalds goto out_err; 13391da177e4SLinus Torvalds 1340f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1341aa9a4ec7SJeff Layton se->se_callback_addr_len, 134207263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 134307263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1344aa9a4ec7SJeff Layton 134507263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 13461da177e4SLinus Torvalds goto out_err; 1347aa9a4ec7SJeff Layton 134807263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 134907263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1350fbf4665fSJeff Layton 135107263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 135207263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1353849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 13541da177e4SLinus Torvalds return; 13551da177e4SLinus Torvalds out_err: 135607263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 135707263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1358849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 13591da177e4SLinus Torvalds "will not receive delegations\n", 13601da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13611da177e4SLinus Torvalds 13621da177e4SLinus Torvalds return; 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds 1365074fe897SAndy Adamson /* 1366557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1367074fe897SAndy Adamson */ 1368074fe897SAndy Adamson void 1369074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1370074fe897SAndy Adamson { 1371557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1372557ce264SAndy Adamson unsigned int base; 1373074fe897SAndy Adamson 1374557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1375074fe897SAndy Adamson 1376557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1377557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1378bf864a31SAndy Adamson 1379bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1380bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1381557ce264SAndy Adamson slot->sl_datalen = 0; 1382bf864a31SAndy Adamson return; 1383bf864a31SAndy Adamson } 1384557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1385557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1386557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1387557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1388557ce264SAndy Adamson slot->sl_datalen)) 1389557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1390557ce264SAndy Adamson return; 1391074fe897SAndy Adamson } 1392074fe897SAndy Adamson 1393074fe897SAndy Adamson /* 1394abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1395abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1396abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1397abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1398abfabf8cSAndy Adamson * 1399074fe897SAndy Adamson */ 1400abfabf8cSAndy Adamson static __be32 1401abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1402abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1403074fe897SAndy Adamson { 1404abfabf8cSAndy Adamson struct nfsd4_op *op; 1405abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1406074fe897SAndy Adamson 1407abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1408abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1409abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1410abfabf8cSAndy Adamson 1411abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 141273e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1413abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1414abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1415abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1416074fe897SAndy Adamson } 1417abfabf8cSAndy Adamson return op->status; 1418074fe897SAndy Adamson } 1419074fe897SAndy Adamson 1420074fe897SAndy Adamson /* 1421557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1422557ce264SAndy Adamson * session values. 1423074fe897SAndy Adamson */ 1424074fe897SAndy Adamson __be32 1425bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1426bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1427074fe897SAndy Adamson { 1428557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1429074fe897SAndy Adamson __be32 status; 1430074fe897SAndy Adamson 1431557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1432074fe897SAndy Adamson 1433abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1434abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1435abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1436abfabf8cSAndy Adamson return status; 1437074fe897SAndy Adamson 1438557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1439557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1440074fe897SAndy Adamson 1441557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1442557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1443557ce264SAndy Adamson status = slot->sl_status; 1444074fe897SAndy Adamson 1445074fe897SAndy Adamson return status; 1446074fe897SAndy Adamson } 1447074fe897SAndy Adamson 14480733d213SAndy Adamson /* 14490733d213SAndy Adamson * Set the exchange_id flags returned by the server. 14500733d213SAndy Adamson */ 14510733d213SAndy Adamson static void 14520733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 14530733d213SAndy Adamson { 14540733d213SAndy Adamson /* pNFS is not supported */ 14550733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 14560733d213SAndy Adamson 14570733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 14580733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 14590733d213SAndy Adamson 14600733d213SAndy Adamson /* set the wire flags to return to client. */ 14610733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 14620733d213SAndy Adamson } 14630733d213SAndy Adamson 1464b37ad28bSAl Viro __be32 1465069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1466069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1467069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1468069b6ad4SAndy Adamson { 14690733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 147057b7b43bSJ. Bruce Fields __be32 status; 14710733d213SAndy Adamson unsigned int strhashval; 14720733d213SAndy Adamson char dname[HEXDIR_LEN]; 1473363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 14740733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1475363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14760733d213SAndy Adamson 1477363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 14780733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1479363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 14800733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1481363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 14820733d213SAndy Adamson 1483a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 14840733d213SAndy Adamson return nfserr_inval; 14850733d213SAndy Adamson 14860733d213SAndy Adamson /* Currently only support SP4_NONE */ 14870733d213SAndy Adamson switch (exid->spa_how) { 14880733d213SAndy Adamson case SP4_NONE: 14890733d213SAndy Adamson break; 14900733d213SAndy Adamson case SP4_SSV: 1491044bc1d4SJ. Bruce Fields return nfserr_serverfault; 14920733d213SAndy Adamson default: 14930733d213SAndy Adamson BUG(); /* checked by xdr code */ 14940733d213SAndy Adamson case SP4_MACH_CRED: 14950733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 14960733d213SAndy Adamson } 14970733d213SAndy Adamson 14980733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 14990733d213SAndy Adamson 15000733d213SAndy Adamson if (status) 15010733d213SAndy Adamson goto error; 15020733d213SAndy Adamson 15030733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15040733d213SAndy Adamson 15050733d213SAndy Adamson nfs4_lock_state(); 15060733d213SAndy Adamson status = nfs_ok; 15070733d213SAndy Adamson 1508e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15090733d213SAndy Adamson if (conf) { 1510e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1511e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1512e203d506SJ. Bruce Fields goto out; 1513e203d506SJ. Bruce Fields } 15140733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 15150733d213SAndy Adamson /* 18.35.4 case 8 */ 15160733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15170733d213SAndy Adamson status = nfserr_not_same; 15180733d213SAndy Adamson goto out; 15190733d213SAndy Adamson } 15200733d213SAndy Adamson /* Client reboot: destroy old state */ 15210733d213SAndy Adamson expire_client(conf); 15220733d213SAndy Adamson goto out_new; 15230733d213SAndy Adamson } 15240733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 15250733d213SAndy Adamson /* 18.35.4 case 9 */ 15260733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15270733d213SAndy Adamson status = nfserr_perm; 15280733d213SAndy Adamson goto out; 15290733d213SAndy Adamson } 15300733d213SAndy Adamson expire_client(conf); 15310733d213SAndy Adamson goto out_new; 15320733d213SAndy Adamson } 15330733d213SAndy Adamson /* 15340733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 15350733d213SAndy Adamson * confirmed client id (18.35.3). 15360733d213SAndy Adamson */ 15370733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 15380733d213SAndy Adamson 15390733d213SAndy Adamson /* 15400733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 15410733d213SAndy Adamson * Leave confirmed record intact and return same result. 15420733d213SAndy Adamson */ 15430733d213SAndy Adamson copy_verf(conf, &verf); 15440733d213SAndy Adamson new = conf; 15450733d213SAndy Adamson goto out_copy; 15466ddbbbfeSMike Sager } 15476ddbbbfeSMike Sager 15480733d213SAndy Adamson /* 18.35.4 case 7 */ 15490733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15500733d213SAndy Adamson status = nfserr_noent; 15510733d213SAndy Adamson goto out; 15520733d213SAndy Adamson } 15530733d213SAndy Adamson 1554e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 15550733d213SAndy Adamson if (unconf) { 15560733d213SAndy Adamson /* 15570733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 15580733d213SAndy Adamson * a new unconfirmed record should be generated regardless 15590733d213SAndy Adamson * of whether any properties have changed. 15600733d213SAndy Adamson */ 15610733d213SAndy Adamson expire_client(unconf); 15620733d213SAndy Adamson } 15630733d213SAndy Adamson 15640733d213SAndy Adamson out_new: 15650733d213SAndy Adamson /* Normal case */ 1566b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 15670733d213SAndy Adamson if (new == NULL) { 15684731030dSJ. Bruce Fields status = nfserr_jukebox; 15690733d213SAndy Adamson goto out; 15700733d213SAndy Adamson } 15710733d213SAndy Adamson 15720733d213SAndy Adamson gen_clid(new); 15730733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 15740733d213SAndy Adamson out_copy: 15750733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 15760733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 15770733d213SAndy Adamson 157838eb76a5SAndy Adamson exid->seqid = 1; 15790733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 15800733d213SAndy Adamson 15810733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 158249557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 15830733d213SAndy Adamson status = nfs_ok; 15840733d213SAndy Adamson 15850733d213SAndy Adamson out: 15860733d213SAndy Adamson nfs4_unlock_state(); 15870733d213SAndy Adamson error: 15880733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 15890733d213SAndy Adamson return status; 1590069b6ad4SAndy Adamson } 1591069b6ad4SAndy Adamson 159257b7b43bSJ. Bruce Fields static __be32 159388e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1594b85d4c01SBenny Halevy { 159588e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 159688e588d5SAndy Adamson slot_seqid); 1597b85d4c01SBenny Halevy 1598b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 159988e588d5SAndy Adamson if (slot_inuse) { 160088e588d5SAndy Adamson if (seqid == slot_seqid) 1601b85d4c01SBenny Halevy return nfserr_jukebox; 1602b85d4c01SBenny Halevy else 1603b85d4c01SBenny Halevy return nfserr_seq_misordered; 1604b85d4c01SBenny Halevy } 1605f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 160688e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1607b85d4c01SBenny Halevy return nfs_ok; 160888e588d5SAndy Adamson if (seqid == slot_seqid) 1609b85d4c01SBenny Halevy return nfserr_replay_cache; 1610b85d4c01SBenny Halevy return nfserr_seq_misordered; 1611b85d4c01SBenny Halevy } 1612b85d4c01SBenny Halevy 161349557cc7SAndy Adamson /* 161449557cc7SAndy Adamson * Cache the create session result into the create session single DRC 161549557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 161649557cc7SAndy Adamson * Do this for solo or embedded create session operations. 161749557cc7SAndy Adamson */ 161849557cc7SAndy Adamson static void 161949557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 162057b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 162149557cc7SAndy Adamson { 162249557cc7SAndy Adamson slot->sl_status = nfserr; 162349557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 162449557cc7SAndy Adamson } 162549557cc7SAndy Adamson 162649557cc7SAndy Adamson static __be32 162749557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 162849557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 162949557cc7SAndy Adamson { 163049557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 163149557cc7SAndy Adamson return slot->sl_status; 163249557cc7SAndy Adamson } 163349557cc7SAndy Adamson 16341b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 16351b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 16361b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16371b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 16381b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16391b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 16401b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 16411b74c25bSMi Jinlong 16421b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 16431b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 16441b74c25bSMi Jinlong 1 + /* status */ \ 16451b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16461b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 16471b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16481b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 16491b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 16501b74c25bSMi Jinlong 165157b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 16521b74c25bSMi Jinlong { 16531b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 16541b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 16551b74c25bSMi Jinlong } 16561b74c25bSMi Jinlong 1657069b6ad4SAndy Adamson __be32 1658069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1659069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1660069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1661069b6ad4SAndy Adamson { 1662363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1663ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1664ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 166549557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 166686c3e16cSJ. Bruce Fields bool confirm_me = false; 166757b7b43bSJ. Bruce Fields __be32 status = 0; 1668ec6b5d7bSAndy Adamson 1669a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1670a62573dcSMi Jinlong return nfserr_inval; 1671a62573dcSMi Jinlong 1672ec6b5d7bSAndy Adamson nfs4_lock_state(); 1673ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1674ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1675ec6b5d7bSAndy Adamson 1676ec6b5d7bSAndy Adamson if (conf) { 167749557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 167849557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 167938eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1680ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 168149557cc7SAndy Adamson cs_slot->sl_seqid); 168238eb76a5SAndy Adamson /* Return the cached reply status */ 168349557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 168438eb76a5SAndy Adamson goto out; 168549557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1686ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1687ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1688ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 168949557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1690ec6b5d7bSAndy Adamson goto out; 1691ec6b5d7bSAndy Adamson } 1692ec6b5d7bSAndy Adamson } else if (unconf) { 1693ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1694363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1695ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1696ec6b5d7bSAndy Adamson goto out; 1697ec6b5d7bSAndy Adamson } 1698ec6b5d7bSAndy Adamson 169949557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 170049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 170138eb76a5SAndy Adamson if (status) { 170238eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1703ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1704cd5b8144SJ. Bruce Fields goto out; 1705ec6b5d7bSAndy Adamson } 1706ec6b5d7bSAndy Adamson 170786c3e16cSJ. Bruce Fields confirm_me = true; 1708ec6b5d7bSAndy Adamson conf = unconf; 1709ec6b5d7bSAndy Adamson } else { 1710ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1711ec6b5d7bSAndy Adamson goto out; 1712ec6b5d7bSAndy Adamson } 1713ec6b5d7bSAndy Adamson 1714408b79bcSJ. Bruce Fields /* 17158323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17168323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17178323c3b2SJ. Bruce Fields */ 17188323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17198323c3b2SJ. Bruce Fields /* 1720408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1721408b79bcSJ. Bruce Fields */ 1722408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1723408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1724408b79bcSJ. Bruce Fields 17251b74c25bSMi Jinlong status = nfserr_toosmall; 17261b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17271b74c25bSMi Jinlong goto out; 17281b74c25bSMi Jinlong 1729ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1730ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1731ac7c46f2SJ. Bruce Fields if (!new) 1732ec6b5d7bSAndy Adamson goto out; 1733ac7c46f2SJ. Bruce Fields status = nfs_ok; 1734ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1735ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 173612050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 173712050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 173886c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 173949557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1740ec6b5d7bSAndy Adamson 174149557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 174249557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 174386c3e16cSJ. Bruce Fields if (confirm_me) 174486c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1745ec6b5d7bSAndy Adamson out: 1746ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1747ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1748ec6b5d7bSAndy Adamson return status; 1749069b6ad4SAndy Adamson } 1750069b6ad4SAndy Adamson 175157716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 175257716355SJ. Bruce Fields { 175357716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 175457716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 175557716355SJ. Bruce Fields 175657716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 175757716355SJ. Bruce Fields } 175857716355SJ. Bruce Fields 17591d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 17601d1bc8f2SJ. Bruce Fields { 17611d1bc8f2SJ. Bruce Fields switch (*dir) { 17621d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 17631d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 17641d1bc8f2SJ. Bruce Fields return nfs_ok; 17651d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 17661d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 17671d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 17681d1bc8f2SJ. Bruce Fields return nfs_ok; 17691d1bc8f2SJ. Bruce Fields }; 17701d1bc8f2SJ. Bruce Fields return nfserr_inval; 17711d1bc8f2SJ. Bruce Fields } 17721d1bc8f2SJ. Bruce Fields 17731d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 17741d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 17751d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 17761d1bc8f2SJ. Bruce Fields { 17771d1bc8f2SJ. Bruce Fields __be32 status; 17781d1bc8f2SJ. Bruce Fields 17791d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 17801d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 17811d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 17821d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 17831d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 17841d1bc8f2SJ. Bruce Fields * client_lock iself: */ 17851d1bc8f2SJ. Bruce Fields if (cstate->session) { 17861d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 17871d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 17881d1bc8f2SJ. Bruce Fields } 17891d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 17901d1bc8f2SJ. Bruce Fields if (!cstate->session) 17911d1bc8f2SJ. Bruce Fields return nfserr_badsession; 17921d1bc8f2SJ. Bruce Fields 17931d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 17941db2b9ddSBryan Schumaker if (!status) 17951d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 17961db2b9ddSBryan Schumaker return status; 17971d1bc8f2SJ. Bruce Fields } 17981d1bc8f2SJ. Bruce Fields 17995d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18005d4cec2fSJ. Bruce Fields { 18015d4cec2fSJ. Bruce Fields if (!session) 18025d4cec2fSJ. Bruce Fields return 0; 18035d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18045d4cec2fSJ. Bruce Fields } 18055d4cec2fSJ. Bruce Fields 1806069b6ad4SAndy Adamson __be32 1807069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1808069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1809069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1810069b6ad4SAndy Adamson { 1811e10e0cfcSBenny Halevy struct nfsd4_session *ses; 181257b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1813e10e0cfcSBenny Halevy 1814e10e0cfcSBenny Halevy /* Notes: 1815e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1816e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1817e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1818e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1819e10e0cfcSBenny Halevy */ 1820e10e0cfcSBenny Halevy 18215d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 182257716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 182357716355SJ. Bruce Fields return nfserr_not_only_op; 182457716355SJ. Bruce Fields } 1825e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18269089f1b4SBenny Halevy spin_lock(&client_lock); 1827e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1828e10e0cfcSBenny Halevy if (!ses) { 18299089f1b4SBenny Halevy spin_unlock(&client_lock); 1830e10e0cfcSBenny Halevy goto out; 1831e10e0cfcSBenny Halevy } 1832e10e0cfcSBenny Halevy 1833e10e0cfcSBenny Halevy unhash_session(ses); 18349089f1b4SBenny Halevy spin_unlock(&client_lock); 1835e10e0cfcSBenny Halevy 1836ab707e15SBenny Halevy nfs4_lock_state(); 183784f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1838ab707e15SBenny Halevy nfs4_unlock_state(); 183919cf5c02SJ. Bruce Fields 1840508dc6e1SBenny Halevy spin_lock(&client_lock); 184119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1842508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1843508dc6e1SBenny Halevy spin_unlock(&client_lock); 1844e10e0cfcSBenny Halevy status = nfs_ok; 1845e10e0cfcSBenny Halevy out: 1846e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1847e10e0cfcSBenny Halevy return status; 1848069b6ad4SAndy Adamson } 1849069b6ad4SAndy Adamson 1850a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1851328ead28SJ. Bruce Fields { 1852328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1853328ead28SJ. Bruce Fields 1854328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1855a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1856328ead28SJ. Bruce Fields return c; 1857328ead28SJ. Bruce Fields } 1858328ead28SJ. Bruce Fields } 1859328ead28SJ. Bruce Fields return NULL; 1860328ead28SJ. Bruce Fields } 1861328ead28SJ. Bruce Fields 1862a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1863328ead28SJ. Bruce Fields { 1864328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1865a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 186621b75b01SJ. Bruce Fields int ret; 1867328ead28SJ. Bruce Fields 1868328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1869a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1870328ead28SJ. Bruce Fields if (c) { 1871328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1872328ead28SJ. Bruce Fields free_conn(new); 1873328ead28SJ. Bruce Fields return; 1874328ead28SJ. Bruce Fields } 1875328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1876328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 187721b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 187821b75b01SJ. Bruce Fields if (ret) 187921b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 188021b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1881328ead28SJ. Bruce Fields return; 1882328ead28SJ. Bruce Fields } 1883328ead28SJ. Bruce Fields 1884868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1885868b89c3SMi Jinlong { 1886868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1887868b89c3SMi Jinlong 1888868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1889868b89c3SMi Jinlong } 1890868b89c3SMi Jinlong 1891ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1892ae82a8d0SMi Jinlong struct nfsd4_session *session) 1893ae82a8d0SMi Jinlong { 1894ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1895ae82a8d0SMi Jinlong 1896ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1897ae82a8d0SMi Jinlong } 1898ae82a8d0SMi Jinlong 1899069b6ad4SAndy Adamson __be32 1900b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1901069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1902069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1903069b6ad4SAndy Adamson { 1904f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1905b85d4c01SBenny Halevy struct nfsd4_session *session; 1906b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1907a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 190857b7b43bSJ. Bruce Fields __be32 status; 1909b85d4c01SBenny Halevy 1910f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1911f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1912f9bb94c4SAndy Adamson 1913a663bdd8SJ. Bruce Fields /* 1914a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1915a663bdd8SJ. Bruce Fields * below. 1916a663bdd8SJ. Bruce Fields */ 1917a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1918a663bdd8SJ. Bruce Fields if (!conn) 1919a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1920a663bdd8SJ. Bruce Fields 19219089f1b4SBenny Halevy spin_lock(&client_lock); 1922b85d4c01SBenny Halevy status = nfserr_badsession; 1923b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1924b85d4c01SBenny Halevy if (!session) 1925b85d4c01SBenny Halevy goto out; 1926b85d4c01SBenny Halevy 1927868b89c3SMi Jinlong status = nfserr_too_many_ops; 1928868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1929868b89c3SMi Jinlong goto out; 1930868b89c3SMi Jinlong 1931ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1932ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1933ae82a8d0SMi Jinlong goto out; 1934ae82a8d0SMi Jinlong 1935b85d4c01SBenny Halevy status = nfserr_badslot; 19366c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1937b85d4c01SBenny Halevy goto out; 1938b85d4c01SBenny Halevy 1939557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1940b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1941b85d4c01SBenny Halevy 1942a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1943a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1944a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1945a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1946a8dfdaebSAndy Adamson 194773e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 194873e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 1949b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1950bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 1951bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 1952bf5c43c8SJ. Bruce Fields goto out; 1953b85d4c01SBenny Halevy cstate->slot = slot; 1954b85d4c01SBenny Halevy cstate->session = session; 1955da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1956557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1957bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1958da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1959aaf84eb9SBenny Halevy goto out; 1960b85d4c01SBenny Halevy } 1961b85d4c01SBenny Halevy if (status) 1962b85d4c01SBenny Halevy goto out; 1963b85d4c01SBenny Halevy 1964a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1965a663bdd8SJ. Bruce Fields conn = NULL; 1966328ead28SJ. Bruce Fields 1967b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1968b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1969bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 197073e79482SJ. Bruce Fields if (seq->cachethis) 197173e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 1972bf5c43c8SJ. Bruce Fields else 1973bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 1974b85d4c01SBenny Halevy 1975b85d4c01SBenny Halevy cstate->slot = slot; 1976b85d4c01SBenny Halevy cstate->session = session; 1977b85d4c01SBenny Halevy 1978b85d4c01SBenny Halevy out: 197926c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1980aaf84eb9SBenny Halevy if (cstate->session) { 19810d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 19820d7bb719SJ. Bruce Fields 198336acb66bSBenny Halevy nfsd4_get_session(cstate->session); 19840d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 19855423732aSBenny Halevy switch (clp->cl_cb_state) { 19865423732aSBenny Halevy case NFSD4_CB_DOWN: 1987fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 19885423732aSBenny Halevy break; 19895423732aSBenny Halevy case NFSD4_CB_FAULT: 1990fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 19915423732aSBenny Halevy break; 1992fc0c3dd1SBenny Halevy default: 1993fc0c3dd1SBenny Halevy seq->status_flags = 0; 19945423732aSBenny Halevy } 1995aaf84eb9SBenny Halevy } 1996a663bdd8SJ. Bruce Fields kfree(conn); 199736acb66bSBenny Halevy spin_unlock(&client_lock); 1998b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1999b85d4c01SBenny Halevy return status; 2000069b6ad4SAndy Adamson } 2001069b6ad4SAndy Adamson 2002345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 2003345c2842SMi Jinlong { 2004345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 2005345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 2006345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 2007345c2842SMi Jinlong } 2008345c2842SMi Jinlong 2009345c2842SMi Jinlong __be32 2010345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2011345c2842SMi Jinlong { 2012345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 201357b7b43bSJ. Bruce Fields __be32 status = 0; 2014345c2842SMi Jinlong 2015345c2842SMi Jinlong nfs4_lock_state(); 2016345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2017345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2018345c2842SMi Jinlong 2019345c2842SMi Jinlong if (conf) { 2020345c2842SMi Jinlong clp = conf; 2021345c2842SMi Jinlong 2022345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 2023345c2842SMi Jinlong status = nfserr_clientid_busy; 2024345c2842SMi Jinlong goto out; 2025345c2842SMi Jinlong } 2026345c2842SMi Jinlong 2027345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2028345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2029345c2842SMi Jinlong status = nfserr_clientid_busy; 2030345c2842SMi Jinlong goto out; 2031345c2842SMi Jinlong } 2032345c2842SMi Jinlong } else if (unconf) 2033345c2842SMi Jinlong clp = unconf; 2034345c2842SMi Jinlong else { 2035345c2842SMi Jinlong status = nfserr_stale_clientid; 2036345c2842SMi Jinlong goto out; 2037345c2842SMi Jinlong } 2038345c2842SMi Jinlong 2039345c2842SMi Jinlong expire_client(clp); 2040345c2842SMi Jinlong out: 2041345c2842SMi Jinlong nfs4_unlock_state(); 2042345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2043345c2842SMi Jinlong return status; 2044345c2842SMi Jinlong } 2045345c2842SMi Jinlong 2046069b6ad4SAndy Adamson __be32 20474dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 20484dc6ec00SJ. Bruce Fields { 204957b7b43bSJ. Bruce Fields __be32 status = 0; 2050bcecf1ccSMi Jinlong 20514dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 20524dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 20534dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 20544dc6ec00SJ. Bruce Fields /* 20554dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 20564dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 20574dc6ec00SJ. Bruce Fields */ 20584dc6ec00SJ. Bruce Fields return nfs_ok; 20594dc6ec00SJ. Bruce Fields } 2060bcecf1ccSMi Jinlong 20614dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2062bcecf1ccSMi Jinlong status = nfserr_complete_already; 2063a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2064a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2065bcecf1ccSMi Jinlong goto out; 2066bcecf1ccSMi Jinlong 2067bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2068bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 20694dc6ec00SJ. Bruce Fields /* 20704dc6ec00SJ. Bruce Fields * The following error isn't really legal. 20714dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 20724dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 20734dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 20744dc6ec00SJ. Bruce Fields * client. 20754dc6ec00SJ. Bruce Fields */ 2076bcecf1ccSMi Jinlong goto out; 2077bcecf1ccSMi Jinlong 2078bcecf1ccSMi Jinlong status = nfs_ok; 20792a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2080bcecf1ccSMi Jinlong out: 20814dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2082bcecf1ccSMi Jinlong return status; 20834dc6ec00SJ. Bruce Fields } 20844dc6ec00SJ. Bruce Fields 20854dc6ec00SJ. Bruce Fields __be32 2086b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2087b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 20881da177e4SLinus Torvalds { 2089a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 20901da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 20911da177e4SLinus Torvalds unsigned int strhashval; 209228ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2093b37ad28bSAl Viro __be32 status; 2094a55370a3SNeilBrown char dname[HEXDIR_LEN]; 20951da177e4SLinus Torvalds 2096a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2097a55370a3SNeilBrown if (status) 209873aea4ecSNeil Brown return status; 2099a55370a3SNeilBrown 21001da177e4SLinus Torvalds /* 21011da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 21021da177e4SLinus Torvalds * We get here on a DRC miss. 21031da177e4SLinus Torvalds */ 21041da177e4SLinus Torvalds 2105a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21061da177e4SLinus Torvalds 21071da177e4SLinus Torvalds nfs4_lock_state(); 2108e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 210928ce6054SNeilBrown if (conf) { 2110a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 21111da177e4SLinus Torvalds status = nfserr_clid_inuse; 2112e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2113e203d506SJ. Bruce Fields goto out; 2114026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2115363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2116363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2117363168b4SJeff Layton sizeof(addr_str)); 2118026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2119363168b4SJeff Layton "at %s\n", addr_str); 21201da177e4SLinus Torvalds goto out; 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds } 2123a186e767SJ. Bruce Fields /* 2124a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 2125a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 2126a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 2127a186e767SJ. Bruce Fields */ 2128e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21293e772463SJ. Bruce Fields status = nfserr_jukebox; 21301da177e4SLinus Torvalds if (!conf) { 21311da177e4SLinus Torvalds /* 2132a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 2133a186e767SJ. Bruce Fields * placed first, because it is the normal case 21341da177e4SLinus Torvalds */ 21351da177e4SLinus Torvalds if (unconf) 21361da177e4SLinus Torvalds expire_client(unconf); 2137b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2138a55370a3SNeilBrown if (new == NULL) 21391da177e4SLinus Torvalds goto out; 21401da177e4SLinus Torvalds gen_clid(new); 2141599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 21421da177e4SLinus Torvalds /* 2143a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 2144a186e767SJ. Bruce Fields * probable callback update 21451da177e4SLinus Torvalds */ 214631f4a6c1SNeilBrown if (unconf) { 214731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 214831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 214931f4a6c1SNeilBrown * This has the advantage that there is at most 215031f4a6c1SNeilBrown * one {*x***} in either list at any time. 215131f4a6c1SNeilBrown */ 21521da177e4SLinus Torvalds expire_client(unconf); 21531da177e4SLinus Torvalds } 2154b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2155a55370a3SNeilBrown if (new == NULL) 21561da177e4SLinus Torvalds goto out; 21571da177e4SLinus Torvalds copy_clid(new, conf); 21581da177e4SLinus Torvalds } else if (!unconf) { 21591da177e4SLinus Torvalds /* 2160a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2161a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2162a186e767SJ. Bruce Fields * confirmed. 21631da177e4SLinus Torvalds */ 2164b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2165a55370a3SNeilBrown if (new == NULL) 21661da177e4SLinus Torvalds goto out; 21671da177e4SLinus Torvalds gen_clid(new); 216849ba8781SJ. Bruce Fields } else { 21691da177e4SLinus Torvalds /* 2170a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2171a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2172a186e767SJ. Bruce Fields * confirmed. 21731da177e4SLinus Torvalds */ 21741da177e4SLinus Torvalds expire_client(unconf); 2175b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2176a55370a3SNeilBrown if (new == NULL) 21771da177e4SLinus Torvalds goto out; 21781da177e4SLinus Torvalds gen_clid(new); 21791da177e4SLinus Torvalds } 21808323c3b2SJ. Bruce Fields /* 21818323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 21828323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 21838323c3b2SJ. Bruce Fields */ 21848323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 21856f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2186c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 21871da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 21881da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 21891da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 21901da177e4SLinus Torvalds status = nfs_ok; 21911da177e4SLinus Torvalds out: 21921da177e4SLinus Torvalds nfs4_unlock_state(); 21931da177e4SLinus Torvalds return status; 21941da177e4SLinus Torvalds } 21951da177e4SLinus Torvalds 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvalds /* 2198a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2199a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2200a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 22011da177e4SLinus Torvalds */ 2202b37ad28bSAl Viro __be32 2203b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2204b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2205b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22061da177e4SLinus Torvalds { 220721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22081da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22091da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2210b37ad28bSAl Viro __be32 status; 22111da177e4SLinus Torvalds 22121da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22131da177e4SLinus Torvalds return nfserr_stale_clientid; 22141da177e4SLinus Torvalds /* 22151da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 22161da177e4SLinus Torvalds * We get here on a DRC miss. 22171da177e4SLinus Torvalds */ 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds nfs4_lock_state(); 222021ab45a4SNeilBrown 222121ab45a4SNeilBrown conf = find_confirmed_client(clid); 222221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 222321ab45a4SNeilBrown 2224a186e767SJ. Bruce Fields /* 2225a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2226a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2227a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2228a186e767SJ. Bruce Fields */ 2229f07ea10dSChuck Lever status = nfserr_clid_inuse; 2230366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2231a186e767SJ. Bruce Fields /* 2232a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2233a186e767SJ. Bruce Fields * callback update 22347c79f737SNeilBrown */ 2235599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22361da177e4SLinus Torvalds status = nfserr_clid_inuse; 22371da177e4SLinus Torvalds else { 22385a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22395a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22401a69c179SNeilBrown expire_client(unconf); 22411da177e4SLinus Torvalds status = nfs_ok; 22421da177e4SLinus Torvalds } 2243f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2244a186e767SJ. Bruce Fields /* 2245a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2246a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2247a186e767SJ. Bruce Fields * do nothing. 22487c79f737SNeilBrown */ 2249599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22501da177e4SLinus Torvalds status = nfserr_clid_inuse; 225121ab45a4SNeilBrown else 22521da177e4SLinus Torvalds status = nfs_ok; 22537c79f737SNeilBrown } else if (!conf && unconf 2254599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2255a186e767SJ. Bruce Fields /* 2256a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2257a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 22581da177e4SLinus Torvalds */ 2259599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22601da177e4SLinus Torvalds status = nfserr_clid_inuse; 22611da177e4SLinus Torvalds } else { 22621a69c179SNeilBrown unsigned int hash = 22631a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22641a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2265e203d506SJ. Bruce Fields hash); 22661a69c179SNeilBrown if (conf) { 22672a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22681a69c179SNeilBrown expire_client(conf); 22691a69c179SNeilBrown } 22701da177e4SLinus Torvalds move_to_confirmed(unconf); 227121ab45a4SNeilBrown conf = unconf; 22725a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22731a69c179SNeilBrown status = nfs_ok; 22741da177e4SLinus Torvalds } 2275599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2276599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 22777c79f737SNeilBrown &confirm)))) { 2278a186e767SJ. Bruce Fields /* 2279a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2280a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 22811da177e4SLinus Torvalds */ 22821da177e4SLinus Torvalds status = nfserr_stale_clientid; 228308e8987cSNeilBrown } 2284f07ea10dSChuck Lever 22851da177e4SLinus Torvalds nfs4_unlock_state(); 22861da177e4SLinus Torvalds return status; 22871da177e4SLinus Torvalds } 22881da177e4SLinus Torvalds 228932513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22901da177e4SLinus Torvalds { 229132513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 229232513b40SJ. Bruce Fields } 229332513b40SJ. Bruce Fields 229432513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 229532513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 229632513b40SJ. Bruce Fields { 22971da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22981da177e4SLinus Torvalds 22998b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23001da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23018beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23028beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23031da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 230447f9940cSMeelap Shah fp->fi_had_conflict = false; 2305acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2306f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2307f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 230847cee541SPavel Emelyanov spin_lock(&recall_lock); 230947cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 231047cee541SPavel Emelyanov spin_unlock(&recall_lock); 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds 23131da177e4SLinus Torvalds static void 2314e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2315e60d4398SNeilBrown { 2316e60d4398SNeilBrown if (*slab == NULL) 2317e60d4398SNeilBrown return; 23181a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2319e60d4398SNeilBrown *slab = NULL; 2320e60d4398SNeilBrown } 2321e60d4398SNeilBrown 2322e8ff2a84SJ. Bruce Fields void 2323e60d4398SNeilBrown nfsd4_free_slabs(void) 2324e60d4398SNeilBrown { 2325fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2326fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2327e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23285ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23295b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2330e60d4398SNeilBrown } 23311da177e4SLinus Torvalds 233272083396SBryan Schumaker int 23331da177e4SLinus Torvalds nfsd4_init_slabs(void) 23341da177e4SLinus Torvalds { 2335fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2336fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2337fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2338fe0750e5SJ. Bruce Fields goto out_nomem; 2339fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2340fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2341fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2342e60d4398SNeilBrown goto out_nomem; 2343e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 234420c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2345e60d4398SNeilBrown if (file_slab == NULL) 2346e60d4398SNeilBrown goto out_nomem; 23475ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2348dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23495ac049acSNeilBrown if (stateid_slab == NULL) 23505ac049acSNeilBrown goto out_nomem; 23515b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 235220c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23535b2d21c1SNeilBrown if (deleg_slab == NULL) 23545b2d21c1SNeilBrown goto out_nomem; 2355e60d4398SNeilBrown return 0; 2356e60d4398SNeilBrown out_nomem: 2357e60d4398SNeilBrown nfsd4_free_slabs(); 23581da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23591da177e4SLinus Torvalds return -ENOMEM; 23601da177e4SLinus Torvalds } 23611da177e4SLinus Torvalds 2362fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23631da177e4SLinus Torvalds { 2364fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2365fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2366fe0750e5SJ. Bruce Fields } 2367fe0750e5SJ. Bruce Fields 2368fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2369fe0750e5SJ. Bruce Fields { 2370fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2371fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23721da177e4SLinus Torvalds } 23731da177e4SLinus Torvalds 2374ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2375ff194bd9SJ. Bruce Fields { 2376ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2377ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2378ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2379ff194bd9SJ. Bruce Fields } 2380ff194bd9SJ. Bruce Fields 2381fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23821da177e4SLinus Torvalds { 23831da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23841da177e4SLinus Torvalds 2385fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2386ff194bd9SJ. Bruce Fields if (!sop) 2387ff194bd9SJ. Bruce Fields return NULL; 2388ff194bd9SJ. Bruce Fields 2389ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2390ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2391fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2392ff194bd9SJ. Bruce Fields return NULL; 2393ff194bd9SJ. Bruce Fields } 23941da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2395ff194bd9SJ. Bruce Fields 2396ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2397ff194bd9SJ. Bruce Fields sop->so_client = clp; 2398ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23991da177e4SLinus Torvalds return sop; 24001da177e4SLinus Torvalds } 2401ff194bd9SJ. Bruce Fields 2402fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2403ff194bd9SJ. Bruce Fields { 240416bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2405fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 2408fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24091da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2410fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24111da177e4SLinus Torvalds 2412fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2413fe0750e5SJ. Bruce Fields if (!oo) 24141da177e4SLinus Torvalds return NULL; 2415fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2416fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2417d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2418fe0750e5SJ. Bruce Fields oo->oo_time = 0; 241938c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2420fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2421fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2422fe0750e5SJ. Bruce Fields return oo; 24231da177e4SLinus Torvalds } 24241da177e4SLinus Torvalds 2425996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2426fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2427d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24281da177e4SLinus Torvalds 2429996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2430ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2431fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24328beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2433fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 243413cd2184SNeilBrown get_nfs4_file(fp); 24351da177e4SLinus Torvalds stp->st_file = fp; 24361da177e4SLinus Torvalds stp->st_access_bmap = 0; 24371da177e4SLinus Torvalds stp->st_deny_bmap = 0; 2438b6d2f1caSJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 24391da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24404c4cd222SNeilBrown stp->st_openstp = NULL; 24411da177e4SLinus Torvalds } 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds static void 2444fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24451da177e4SLinus Torvalds { 2446fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24471da177e4SLinus Torvalds 2448fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2449fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds 24521da177e4SLinus Torvalds static int 2453599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2454599e0a22SJ. Bruce Fields clientid_t *clid) 2455599e0a22SJ. Bruce Fields { 2456599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2457599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2458599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24591da177e4SLinus Torvalds } 24601da177e4SLinus Torvalds 2461fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24621da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24631da177e4SLinus Torvalds { 2464a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2465a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24661da177e4SLinus Torvalds 246716bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 246816bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 246916bfdaafSJ. Bruce Fields continue; 2470a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2471a50d2ad1SJ. Bruce Fields oo = openowner(so); 2472a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2473a50d2ad1SJ. Bruce Fields return oo; 2474a50d2ad1SJ. Bruce Fields } 24751da177e4SLinus Torvalds } 24761da177e4SLinus Torvalds return NULL; 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds 24791da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24801da177e4SLinus Torvalds static struct nfs4_file * 24811da177e4SLinus Torvalds find_file(struct inode *ino) 24821da177e4SLinus Torvalds { 24831da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24841da177e4SLinus Torvalds struct nfs4_file *fp; 24851da177e4SLinus Torvalds 24868b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24871da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 248813cd2184SNeilBrown if (fp->fi_inode == ino) { 248913cd2184SNeilBrown get_nfs4_file(fp); 24908b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24911da177e4SLinus Torvalds return fp; 24921da177e4SLinus Torvalds } 249313cd2184SNeilBrown } 24948b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24951da177e4SLinus Torvalds return NULL; 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds 24984f83aa30SJ. Bruce Fields /* 24991da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25001da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25011da177e4SLinus Torvalds */ 2502b37ad28bSAl Viro static __be32 25031da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25041da177e4SLinus Torvalds { 25051da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25061da177e4SLinus Torvalds struct nfs4_file *fp; 2507dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2508b37ad28bSAl Viro __be32 ret; 25091da177e4SLinus Torvalds 25101da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25111da177e4SLinus Torvalds 25121da177e4SLinus Torvalds fp = find_file(ino); 251313cd2184SNeilBrown if (!fp) 251413cd2184SNeilBrown return nfs_ok; 2515b700949bSNeilBrown ret = nfserr_locked; 25161da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25178beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 25181da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 25191da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 252013cd2184SNeilBrown goto out; 25211da177e4SLinus Torvalds } 252213cd2184SNeilBrown ret = nfs_ok; 252313cd2184SNeilBrown out: 252413cd2184SNeilBrown put_nfs4_file(fp); 252513cd2184SNeilBrown return ret; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 25286b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25291da177e4SLinus Torvalds { 25301da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25311da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25321da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25331da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25341da177e4SLinus Torvalds * it's safe to take a reference: */ 25351da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25361da177e4SLinus Torvalds 25371da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25381da177e4SLinus Torvalds 2539460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25401da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25411da177e4SLinus Torvalds 25426b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25436b57d9c8SJ. Bruce Fields } 25446b57d9c8SJ. Bruce Fields 2545acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25466b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25476b57d9c8SJ. Bruce Fields { 2548acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2549acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25506b57d9c8SJ. Bruce Fields 2551acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2552acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2553acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25540272e1fdSJ. Bruce Fields /* 25550272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2556acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25576b57d9c8SJ. Bruce Fields * in time: 25580272e1fdSJ. Bruce Fields */ 25590272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25601da177e4SLinus Torvalds 25615d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2562acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2563acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25645d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25655d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25661da177e4SLinus Torvalds } 25671da177e4SLinus Torvalds 25681da177e4SLinus Torvalds static 25691da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25701da177e4SLinus Torvalds { 25711da177e4SLinus Torvalds if (arg & F_UNLCK) 25721da177e4SLinus Torvalds return lease_modify(onlist, arg); 25731da177e4SLinus Torvalds else 25741da177e4SLinus Torvalds return -EAGAIN; 25751da177e4SLinus Torvalds } 25761da177e4SLinus Torvalds 25777b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25788fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25798fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25801da177e4SLinus Torvalds }; 25811da177e4SLinus Torvalds 25827a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25837a8711c9SJ. Bruce Fields { 25847a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25857a8711c9SJ. Bruce Fields return nfs_ok; 25867a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25877a8711c9SJ. Bruce Fields return nfserr_replay_me; 25887a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25897a8711c9SJ. Bruce Fields return nfs_ok; 25907a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25917a8711c9SJ. Bruce Fields } 25921da177e4SLinus Torvalds 2593b37ad28bSAl Viro __be32 25946668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25956668958fSAndy Adamson struct nfsd4_open *open) 25961da177e4SLinus Torvalds { 25971da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25981da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25991da177e4SLinus Torvalds unsigned int strhashval; 2600fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26014cdc951bSJ. Bruce Fields __be32 status; 26021da177e4SLinus Torvalds 26031da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 26041da177e4SLinus Torvalds return nfserr_stale_clientid; 260532513b40SJ. Bruce Fields /* 260632513b40SJ. Bruce Fields * In case we need it later, after we've already created the 260732513b40SJ. Bruce Fields * file and don't want to risk a further failure: 260832513b40SJ. Bruce Fields */ 260932513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 261032513b40SJ. Bruce Fields if (open->op_file == NULL) 261132513b40SJ. Bruce Fields return nfserr_jukebox; 26121da177e4SLinus Torvalds 261316bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2614fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2615fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2616fe0750e5SJ. Bruce Fields if (!oo) { 26170f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26180f442aa2SJ. Bruce Fields if (clp == NULL) 26190f442aa2SJ. Bruce Fields return nfserr_expired; 2620bcf130f9SJ. Bruce Fields goto new_owner; 26210f442aa2SJ. Bruce Fields } 2622dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26230f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2624fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2625fe0750e5SJ. Bruce Fields release_openowner(oo); 2626fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2627bcf130f9SJ. Bruce Fields goto new_owner; 26280f442aa2SJ. Bruce Fields } 26294cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26304cdc951bSJ. Bruce Fields if (status) 26314cdc951bSJ. Bruce Fields return status; 26324cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26334cdc951bSJ. Bruce Fields goto alloc_stateid; 2634bcf130f9SJ. Bruce Fields new_owner: 2635fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2636fe0750e5SJ. Bruce Fields if (oo == NULL) 26373e772463SJ. Bruce Fields return nfserr_jukebox; 2638fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26394cdc951bSJ. Bruce Fields alloc_stateid: 26404cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26414cdc951bSJ. Bruce Fields if (!open->op_stp) 26424cdc951bSJ. Bruce Fields return nfserr_jukebox; 26430f442aa2SJ. Bruce Fields return nfs_ok; 26441da177e4SLinus Torvalds } 26451da177e4SLinus Torvalds 2646b37ad28bSAl Viro static inline __be32 26474a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26484a6e43e6SNeilBrown { 26494a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26504a6e43e6SNeilBrown return nfserr_openmode; 26514a6e43e6SNeilBrown else 26524a6e43e6SNeilBrown return nfs_ok; 26534a6e43e6SNeilBrown } 26544a6e43e6SNeilBrown 2655c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 265624a0111eSJ. Bruce Fields { 265724a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 265824a0111eSJ. Bruce Fields } 265924a0111eSJ. Bruce Fields 266038c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2661f459e453SJ. Bruce Fields { 2662f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2663f459e453SJ. Bruce Fields 266438c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2665f459e453SJ. Bruce Fields if (!ret) 2666f459e453SJ. Bruce Fields return NULL; 2667f459e453SJ. Bruce Fields return delegstateid(ret); 2668f459e453SJ. Bruce Fields } 2669f459e453SJ. Bruce Fields 26708b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26718b289b2cSJ. Bruce Fields { 26728b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26738b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26748b289b2cSJ. Bruce Fields } 26758b289b2cSJ. Bruce Fields 2676b37ad28bSAl Viro static __be32 267738c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2678567d9829SNeilBrown struct nfs4_delegation **dp) 2679567d9829SNeilBrown { 2680567d9829SNeilBrown int flags; 2681b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2682567d9829SNeilBrown 268338c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2684567d9829SNeilBrown if (*dp == NULL) 2685c44c5eebSNeilBrown goto out; 268624a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2687567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2688567d9829SNeilBrown if (status) 2689567d9829SNeilBrown *dp = NULL; 2690c44c5eebSNeilBrown out: 26918b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2692c44c5eebSNeilBrown return nfs_ok; 2693c44c5eebSNeilBrown if (status) 2694c44c5eebSNeilBrown return status; 2695dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2696c44c5eebSNeilBrown return nfs_ok; 2697567d9829SNeilBrown } 2698567d9829SNeilBrown 2699b37ad28bSAl Viro static __be32 2700dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27011da177e4SLinus Torvalds { 2702dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2703fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27041da177e4SLinus Torvalds 27058beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27061da177e4SLinus Torvalds /* ignore lock owners */ 27071da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27081da177e4SLinus Torvalds continue; 27091da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2710fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27111da177e4SLinus Torvalds *stpp = local; 27121da177e4SLinus Torvalds /* check for conflicting share reservations */ 27131da177e4SLinus Torvalds if (!test_share(local, open)) 271477eaae8dSJ. Bruce Fields return nfserr_share_denied; 27151da177e4SLinus Torvalds } 271677eaae8dSJ. Bruce Fields return nfs_ok; 27171da177e4SLinus Torvalds } 27181da177e4SLinus Torvalds 2719996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2720996e0938SJ. Bruce Fields { 2721996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27225ac049acSNeilBrown } 27235ac049acSNeilBrown 272421fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 272521fb4016SJ. Bruce Fields { 272621fb4016SJ. Bruce Fields int flags = 0; 272721fb4016SJ. Bruce Fields 272821fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 272921fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 273021fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 273121fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 273221fb4016SJ. Bruce Fields return flags; 273321fb4016SJ. Bruce Fields } 273421fb4016SJ. Bruce Fields 27350c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27360c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2737f9d7562fSJ. Bruce Fields { 2738f9d7562fSJ. Bruce Fields __be32 status; 27390c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27400c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27410c12eaffSCasey Bodley 2742f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2743f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2744f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2745f9d7562fSJ. Bruce Fields if (status) 2746f9d7562fSJ. Bruce Fields return status; 2747f9d7562fSJ. Bruce Fields } 2748f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2749f9d7562fSJ. Bruce Fields 2750f9d7562fSJ. Bruce Fields return nfs_ok; 2751f9d7562fSJ. Bruce Fields } 2752f9d7562fSJ. Bruce Fields 2753b37ad28bSAl Viro static inline __be32 27541da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27551da177e4SLinus Torvalds struct nfsd4_open *open) 27561da177e4SLinus Torvalds { 27571da177e4SLinus Torvalds struct iattr iattr = { 27581da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27591da177e4SLinus Torvalds .ia_size = 0, 27601da177e4SLinus Torvalds }; 27611da177e4SLinus Torvalds if (!open->op_truncate) 27621da177e4SLinus Torvalds return 0; 27631da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27649246585aSAl Viro return nfserr_inval; 27651da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27661da177e4SLinus Torvalds } 27671da177e4SLinus Torvalds 2768b37ad28bSAl Viro static __be32 2769dcef0413SJ. 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) 27701da177e4SLinus Torvalds { 2771b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27727d947842SJ. Bruce Fields bool new_access; 2773b37ad28bSAl Viro __be32 status; 27741da177e4SLinus Torvalds 27757d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2776f9d7562fSJ. Bruce Fields if (new_access) { 27770c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2778f9d7562fSJ. Bruce Fields if (status) 2779f9d7562fSJ. Bruce Fields return status; 27806c26d08fSJ. Bruce Fields } 27811da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27821da177e4SLinus Torvalds if (status) { 2783f9d7562fSJ. Bruce Fields if (new_access) { 2784f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2785f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2786f9d7562fSJ. Bruce Fields } 27871da177e4SLinus Torvalds return status; 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds /* remember the open */ 279024a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2791b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27921da177e4SLinus Torvalds 27931da177e4SLinus Torvalds return nfs_ok; 27941da177e4SLinus Torvalds } 27951da177e4SLinus Torvalds 27961da177e4SLinus Torvalds 27971da177e4SLinus Torvalds static void 27981255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 27991da177e4SLinus Torvalds { 2800dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28011da177e4SLinus Torvalds } 28021da177e4SLinus Torvalds 280314a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 280414a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 280514a24e99SJ. Bruce Fields { 280614a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 280714a24e99SJ. Bruce Fields return true; 280814a24e99SJ. Bruce Fields /* 280914a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 281014a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 281114a24e99SJ. Bruce Fields * until we hear otherwise: 281214a24e99SJ. Bruce Fields */ 281314a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 281414a24e99SJ. Bruce Fields } 281514a24e99SJ. Bruce Fields 281622d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 281722d38c4cSJ. Bruce Fields { 281822d38c4cSJ. Bruce Fields struct file_lock *fl; 281922d38c4cSJ. Bruce Fields 282022d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 282122d38c4cSJ. Bruce Fields if (!fl) 282222d38c4cSJ. Bruce Fields return NULL; 282322d38c4cSJ. Bruce Fields locks_init_lock(fl); 282422d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 282522d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 282622d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 282722d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2828acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 282922d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 283022d38c4cSJ. Bruce Fields return fl; 283122d38c4cSJ. Bruce Fields } 283222d38c4cSJ. Bruce Fields 2833edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2834edab9782SJ. Bruce Fields { 2835acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2836edab9782SJ. Bruce Fields struct file_lock *fl; 2837edab9782SJ. Bruce Fields int status; 2838edab9782SJ. Bruce Fields 2839edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2840edab9782SJ. Bruce Fields if (!fl) 2841edab9782SJ. Bruce Fields return -ENOMEM; 2842acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28432a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2844acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2845edab9782SJ. Bruce Fields if (status) { 2846acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2847edab9782SJ. Bruce Fields locks_free_lock(fl); 2848edab9782SJ. Bruce Fields return -ENOMEM; 2849edab9782SJ. Bruce Fields } 2850acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2851acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2852acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2853acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2854acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2855acfdf5c3SJ. Bruce Fields return 0; 2856acfdf5c3SJ. Bruce Fields } 2857acfdf5c3SJ. Bruce Fields 2858acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2859acfdf5c3SJ. Bruce Fields { 2860acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2861acfdf5c3SJ. Bruce Fields 2862acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2863acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2864acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2865acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2866acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2867acfdf5c3SJ. Bruce Fields return -EAGAIN; 2868acfdf5c3SJ. Bruce Fields } 2869acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2870acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2871acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28722a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2873edab9782SJ. Bruce Fields return 0; 2874edab9782SJ. Bruce Fields } 2875edab9782SJ. Bruce Fields 28764aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28774aa8913cSBenny Halevy { 28784aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28794aa8913cSBenny Halevy if (status == -EAGAIN) 28804aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28814aa8913cSBenny Halevy else { 28824aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28834aa8913cSBenny Halevy switch (open->op_deleg_want) { 28844aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28854aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28864aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28874aa8913cSBenny Halevy break; 28884aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28894aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 28904aa8913cSBenny Halevy break; 28914aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 28924aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 28934aa8913cSBenny Halevy } 28944aa8913cSBenny Halevy } 28954aa8913cSBenny Halevy } 28964aa8913cSBenny Halevy 28971da177e4SLinus Torvalds /* 28981da177e4SLinus Torvalds * Attempt to hand out a delegation. 28991da177e4SLinus Torvalds */ 29001da177e4SLinus Torvalds static void 2901dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29021da177e4SLinus Torvalds { 29031da177e4SLinus Torvalds struct nfs4_delegation *dp; 2904fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 290514a24e99SJ. Bruce Fields int cb_up; 2906d24433cdSBenny Halevy int status = 0, flag = 0; 29071da177e4SLinus Torvalds 2908fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29091da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29107b190fecSNeilBrown open->op_recall = 0; 29117b190fecSNeilBrown switch (open->op_claim_type) { 29127b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29132bf23875SJ. Bruce Fields if (!cb_up) 29147b190fecSNeilBrown open->op_recall = 1; 29157b190fecSNeilBrown flag = open->op_delegate_type; 29167b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29171da177e4SLinus Torvalds goto out; 29187b190fecSNeilBrown break; 29197b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29207b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29217b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2922af558e33SJ. Bruce Fields if (locks_in_grace()) 29237b190fecSNeilBrown goto out; 2924dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29257b190fecSNeilBrown goto out; 29261da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29271da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29281da177e4SLinus Torvalds else 29291da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29307b190fecSNeilBrown break; 29317b190fecSNeilBrown default: 29327b190fecSNeilBrown goto out; 29337b190fecSNeilBrown } 29341da177e4SLinus Torvalds 2935fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2936dd239cc0SJ. Bruce Fields if (dp == NULL) 2937dd239cc0SJ. Bruce Fields goto out_no_deleg; 2938acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2939edab9782SJ. Bruce Fields if (status) 2940dd239cc0SJ. Bruce Fields goto out_free; 29411da177e4SLinus Torvalds 2942d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29431da177e4SLinus Torvalds 29448c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2945d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29461da177e4SLinus Torvalds out: 29471da177e4SLinus Torvalds open->op_delegate_type = flag; 2948d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2949d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2950d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2951d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2952d24433cdSBenny Halevy 29534aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29544aa8913cSBenny Halevy if (open->op_deleg_want) 29554aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2956d24433cdSBenny Halevy } 2957dd239cc0SJ. Bruce Fields return; 2958dd239cc0SJ. Bruce Fields out_free: 2959acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2960dd239cc0SJ. Bruce Fields out_no_deleg: 2961dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2962dd239cc0SJ. Bruce Fields goto out; 29631da177e4SLinus Torvalds } 29641da177e4SLinus Torvalds 2965e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2966e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2967e27f49c3SBenny Halevy { 2968e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2969e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2970e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2971e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2972e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2973e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2974e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2975e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2976e27f49c3SBenny Halevy } 2977e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2978e27f49c3SBenny Halevy * it already has, therefore we don't return 2979e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2980e27f49c3SBenny Halevy */ 2981e27f49c3SBenny Halevy } 2982e27f49c3SBenny Halevy 29831da177e4SLinus Torvalds /* 29841da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29851da177e4SLinus Torvalds */ 2986b37ad28bSAl Viro __be32 29871da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29881da177e4SLinus Torvalds { 29896668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 299038c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29911da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29921da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2993dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2994567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2995b37ad28bSAl Viro __be32 status; 29961da177e4SLinus Torvalds 29971da177e4SLinus Torvalds /* 29981da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29991da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30001da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30011da177e4SLinus Torvalds */ 30021da177e4SLinus Torvalds fp = find_file(ino); 30031da177e4SLinus Torvalds if (fp) { 30041da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30051da177e4SLinus Torvalds goto out; 300638c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3007c44c5eebSNeilBrown if (status) 3008c44c5eebSNeilBrown goto out; 30091da177e4SLinus Torvalds } else { 3010c44c5eebSNeilBrown status = nfserr_bad_stateid; 30118b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3012c44c5eebSNeilBrown goto out; 30133e772463SJ. Bruce Fields status = nfserr_jukebox; 301432513b40SJ. Bruce Fields fp = open->op_file; 301532513b40SJ. Bruce Fields open->op_file = NULL; 301632513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30171da177e4SLinus Torvalds } 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds /* 30201da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30211da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30221da177e4SLinus Torvalds */ 30231da177e4SLinus Torvalds if (stp) { 30241da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3025f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30261da177e4SLinus Torvalds if (status) 30271da177e4SLinus Torvalds goto out; 30281da177e4SLinus Torvalds } else { 30294cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3030567d9829SNeilBrown if (status) 30311da177e4SLinus Torvalds goto out; 30324cdc951bSJ. Bruce Fields stp = open->op_stp; 30334cdc951bSJ. Bruce Fields open->op_stp = NULL; 3034996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30351da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30361da177e4SLinus Torvalds if (status) { 30372283963fSJ. Bruce Fields release_open_stateid(stp); 30381da177e4SLinus Torvalds goto out; 30391da177e4SLinus Torvalds } 30401da177e4SLinus Torvalds } 3041dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3042dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30431da177e4SLinus Torvalds 3044d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3045dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30466668958fSAndy Adamson 3047d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3048d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3049d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3050d24433cdSBenny Halevy goto nodeleg; 3051d24433cdSBenny Halevy } 3052d24433cdSBenny Halevy } 3053d24433cdSBenny Halevy 30541da177e4SLinus Torvalds /* 30551da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30561da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30571da177e4SLinus Torvalds */ 30581da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3059d24433cdSBenny Halevy nodeleg: 30601da177e4SLinus Torvalds status = nfs_ok; 30611da177e4SLinus Torvalds 30628c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3063dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30641da177e4SLinus Torvalds out: 3065d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3066d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3067e27f49c3SBenny Halevy open->op_deleg_want) 3068e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3069d24433cdSBenny Halevy 307013cd2184SNeilBrown if (fp) 307113cd2184SNeilBrown put_nfs4_file(fp); 307237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30731255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30741da177e4SLinus Torvalds /* 30751da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30761da177e4SLinus Torvalds */ 30771da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3078dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30796668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30801da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30811da177e4SLinus Torvalds 30821da177e4SLinus Torvalds return status; 30831da177e4SLinus Torvalds } 30841da177e4SLinus Torvalds 3085d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3086d29b20cdSJ. Bruce Fields { 3087d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3088d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3089d29b20cdSJ. Bruce Fields 3090d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3091d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3092d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3093d29b20cdSJ. Bruce Fields if (status) { 3094d29b20cdSJ. Bruce Fields release_openowner(oo); 3095d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3096d29b20cdSJ. Bruce Fields } else 3097d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3098d29b20cdSJ. Bruce Fields } 3099d29b20cdSJ. Bruce Fields } 310032513b40SJ. Bruce Fields if (open->op_file) 310132513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31024cdc951bSJ. Bruce Fields if (open->op_stp) 31034cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3104d29b20cdSJ. Bruce Fields } 3105d29b20cdSJ. Bruce Fields 3106b37ad28bSAl Viro __be32 3107b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3108b591480bSJ.Bruce Fields clientid_t *clid) 31091da177e4SLinus Torvalds { 31101da177e4SLinus Torvalds struct nfs4_client *clp; 3111b37ad28bSAl Viro __be32 status; 31121da177e4SLinus Torvalds 31131da177e4SLinus Torvalds nfs4_lock_state(); 31141da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31151da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31161da177e4SLinus Torvalds status = nfserr_stale_clientid; 31171da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31181da177e4SLinus Torvalds goto out; 31191da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31201da177e4SLinus Torvalds status = nfserr_expired; 31211da177e4SLinus Torvalds if (clp == NULL) { 31221da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31231da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31241da177e4SLinus Torvalds goto out; 31251da177e4SLinus Torvalds } 31261da177e4SLinus Torvalds status = nfserr_cb_path_down; 3127ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 312877a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31291da177e4SLinus Torvalds goto out; 31301da177e4SLinus Torvalds status = nfs_ok; 31311da177e4SLinus Torvalds out: 31321da177e4SLinus Torvalds nfs4_unlock_state(); 31331da177e4SLinus Torvalds return status; 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds 3136c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3137af558e33SJ. Bruce Fields }; 3138af558e33SJ. Bruce Fields 313933dcc481SJeff Layton static bool grace_ended; 314033dcc481SJeff Layton 3141a76b4319SNeilBrown static void 3142af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3143a76b4319SNeilBrown { 314433dcc481SJeff Layton /* do nothing if grace period already ended */ 314533dcc481SJeff Layton if (grace_ended) 314633dcc481SJeff Layton return; 314733dcc481SJeff Layton 3148a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 314933dcc481SJeff Layton grace_ended = true; 31502a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3151af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3152e46b498cSJ. Bruce Fields /* 3153e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3154e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3155e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3156e46b498cSJ. Bruce Fields */ 3157e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3158a76b4319SNeilBrown } 3159a76b4319SNeilBrown 3160fd39ca9aSNeilBrown static time_t 31611da177e4SLinus Torvalds nfs4_laundromat(void) 31621da177e4SLinus Torvalds { 31631da177e4SLinus Torvalds struct nfs4_client *clp; 3164fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31651da177e4SLinus Torvalds struct nfs4_delegation *dp; 31661da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3167cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3168cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3169cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31701da177e4SLinus Torvalds 31711da177e4SLinus Torvalds nfs4_lock_state(); 31721da177e4SLinus Torvalds 31731da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3174af558e33SJ. Bruce Fields nfsd4_end_grace(); 317536acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 317636acb66bSBenny Halevy spin_lock(&client_lock); 31771da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31781da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31791da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31801da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31811da177e4SLinus Torvalds if (clientid_val > t) 31821da177e4SLinus Torvalds clientid_val = t; 31831da177e4SLinus Torvalds break; 31841da177e4SLinus Torvalds } 3185d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3186d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3187d7682988SBenny Halevy clp->cl_clientid.cl_id); 3188d7682988SBenny Halevy continue; 3189d7682988SBenny Halevy } 3190d7682988SBenny Halevy unhash_client_locked(clp); 3191d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 319236acb66bSBenny Halevy } 319336acb66bSBenny Halevy spin_unlock(&client_lock); 319436acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 319536acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31961da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31971da177e4SLinus Torvalds clp->cl_clientid.cl_id); 31982a4317c5SJeff Layton nfsd4_client_record_remove(clp); 31991da177e4SLinus Torvalds expire_client(clp); 32001da177e4SLinus Torvalds } 32011da177e4SLinus Torvalds spin_lock(&recall_lock); 32021da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32031da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32041da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32051da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32061da177e4SLinus Torvalds if (test_val > u) 32071da177e4SLinus Torvalds test_val = u; 32081da177e4SLinus Torvalds break; 32091da177e4SLinus Torvalds } 32101da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32111da177e4SLinus Torvalds } 32121da177e4SLinus Torvalds spin_unlock(&recall_lock); 32131da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32141da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32151da177e4SLinus Torvalds unhash_delegation(dp); 32161da177e4SLinus Torvalds } 3217cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32181da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3219fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3220fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3221fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32221da177e4SLinus Torvalds if (test_val > u) 32231da177e4SLinus Torvalds test_val = u; 32241da177e4SLinus Torvalds break; 32251da177e4SLinus Torvalds } 3226fe0750e5SJ. Bruce Fields release_openowner(oo); 32271da177e4SLinus Torvalds } 32281da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32291da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32301da177e4SLinus Torvalds nfs4_unlock_state(); 32311da177e4SLinus Torvalds return clientid_val; 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds 3234a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3235a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3236a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3237a254b246SHarvey Harrison 3238a254b246SHarvey Harrison static void 3239c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32401da177e4SLinus Torvalds { 32411da177e4SLinus Torvalds time_t t; 32421da177e4SLinus Torvalds 32431da177e4SLinus Torvalds t = nfs4_laundromat(); 32441da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 324558da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds 3248f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3249f8816512SNeilBrown { 3250f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3251f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3252f7a4d872SJ. Bruce Fields return nfs_ok; 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds 32551da177e4SLinus Torvalds static int 32561da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32571da177e4SLinus Torvalds { 3258d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3259e4e83ea4SJ. Bruce Fields return 0; 32608c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32618c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32621da177e4SLinus Torvalds return 1; 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static inline int 32661da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 32671da177e4SLinus Torvalds { 32681da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 32691da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 32701da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 32711da177e4SLinus Torvalds } 32721da177e4SLinus Torvalds 32731da177e4SLinus Torvalds static inline int 32741da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 32751da177e4SLinus Torvalds { 32761da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 32771da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds 32801da177e4SLinus Torvalds static 3281dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32821da177e4SLinus Torvalds { 3283b37ad28bSAl Viro __be32 status = nfserr_openmode; 32841da177e4SLinus Torvalds 328502921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 328602921914SJ. Bruce Fields if (stp->st_openstp) 328702921914SJ. Bruce Fields stp = stp->st_openstp; 32881da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 32891da177e4SLinus Torvalds goto out; 32901da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 32911da177e4SLinus Torvalds goto out; 32921da177e4SLinus Torvalds status = nfs_ok; 32931da177e4SLinus Torvalds out: 32941da177e4SLinus Torvalds return status; 32951da177e4SLinus Torvalds } 32961da177e4SLinus Torvalds 3297b37ad28bSAl Viro static inline __be32 32981da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 32991da177e4SLinus Torvalds { 3300203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33011da177e4SLinus Torvalds return nfs_ok; 3302af558e33SJ. Bruce Fields else if (locks_in_grace()) { 330325985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33041da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33051da177e4SLinus Torvalds return nfserr_grace; 33061da177e4SLinus Torvalds } else if (flags & WR_STATE) 33071da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33081da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33091da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33101da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33111da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33121da177e4SLinus Torvalds } 33131da177e4SLinus Torvalds 33141da177e4SLinus Torvalds /* 33151da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33161da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33171da177e4SLinus Torvalds */ 33181da177e4SLinus Torvalds static inline int 331918f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33201da177e4SLinus Torvalds { 3321203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33221da177e4SLinus Torvalds } 33231da177e4SLinus Torvalds 332481b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 332581b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 332681b82965SJ. Bruce Fields { 332781b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 332881b82965SJ. Bruce Fields } 332981b82965SJ. Bruce Fields 333057b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33310836f587SJ. Bruce Fields { 33326668958fSAndy Adamson /* 33336668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33346668958fSAndy Adamson * when it is zero. 33356668958fSAndy Adamson */ 333628dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 333781b82965SJ. Bruce Fields return nfs_ok; 333881b82965SJ. Bruce Fields 333981b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 334081b82965SJ. Bruce Fields return nfs_ok; 33416668958fSAndy Adamson 33420836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 334381b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33440836f587SJ. Bruce Fields return nfserr_bad_stateid; 33450836f587SJ. Bruce Fields /* 334681b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 334781b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 334881b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 334981b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 335081b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 335181b82965SJ. Bruce Fields * but better performance may result in retrying IO that 335281b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 335381b82965SJ. Bruce Fields * reordered in flight: 33540836f587SJ. Bruce Fields */ 33550836f587SJ. Bruce Fields return nfserr_old_stateid; 33560836f587SJ. Bruce Fields } 33570836f587SJ. Bruce Fields 335838c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 335917456804SBryan Schumaker { 336097b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 336197b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 336297b7e3b6SJ. Bruce Fields __be32 status; 336317456804SBryan Schumaker 336417456804SBryan Schumaker if (STALE_STATEID(stateid)) 336597b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 336617456804SBryan Schumaker 336738c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 336897b7e3b6SJ. Bruce Fields if (!s) 336997b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 337036279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 337117456804SBryan Schumaker if (status) 337217456804SBryan Schumaker return status; 337397b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 337497b7e3b6SJ. Bruce Fields return nfs_ok; 337597b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 337697b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3377dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 337897b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 337997b7e3b6SJ. Bruce Fields return nfs_ok; 338017456804SBryan Schumaker } 338117456804SBryan Schumaker 338238c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 338338c2f4b1SJ. Bruce Fields { 338438c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 338538c2f4b1SJ. Bruce Fields 338638c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 338738c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 338838c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 338938c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 339038c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 339138c2f4b1SJ. Bruce Fields if (!cl) 339238c2f4b1SJ. Bruce Fields return nfserr_expired; 339338c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 339438c2f4b1SJ. Bruce Fields if (!*s) 339538c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 339638c2f4b1SJ. Bruce Fields return nfs_ok; 339738c2f4b1SJ. Bruce Fields 339838c2f4b1SJ. Bruce Fields } 339938c2f4b1SJ. Bruce Fields 34001da177e4SLinus Torvalds /* 34011da177e4SLinus Torvalds * Checks for stateid operations 34021da177e4SLinus Torvalds */ 3403b37ad28bSAl Viro __be32 3404dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3405dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34061da177e4SLinus Torvalds { 340769064a27SJ. Bruce Fields struct nfs4_stid *s; 3408dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34091da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3410dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34111da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3412b37ad28bSAl Viro __be32 status; 34131da177e4SLinus Torvalds 34141da177e4SLinus Torvalds if (filpp) 34151da177e4SLinus Torvalds *filpp = NULL; 34161da177e4SLinus Torvalds 341718f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34181da177e4SLinus Torvalds return nfserr_grace; 34191da177e4SLinus Torvalds 34201da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34211da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34221da177e4SLinus Torvalds 342338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 342438c2f4b1SJ. Bruce Fields if (status) 342538c2f4b1SJ. Bruce Fields return status; 342669064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34270c2a498fSJ. Bruce Fields if (status) 34280c2a498fSJ. Bruce Fields goto out; 3429f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3430f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 343169064a27SJ. Bruce Fields dp = delegstateid(s); 3432dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3433dc9bf700SJ. Bruce Fields if (status) 3434dc9bf700SJ. Bruce Fields goto out; 343543b0178eSDan Carpenter if (filpp) { 3436acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3437f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 343843b0178eSDan Carpenter } 3439f7a4d872SJ. Bruce Fields break; 3440f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3441f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 344269064a27SJ. Bruce Fields stp = openlockstateid(s); 3443f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3444f7a4d872SJ. Bruce Fields if (status) 34451da177e4SLinus Torvalds goto out; 3446fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3447dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34481da177e4SLinus Torvalds goto out; 3449a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3450a4455be0SJ. Bruce Fields if (status) 34511da177e4SLinus Torvalds goto out; 3452f9d7562fSJ. Bruce Fields if (filpp) { 3453f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3454f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3455f9d7562fSJ. Bruce Fields else 3456f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3457f9d7562fSJ. Bruce Fields } 3458f7a4d872SJ. Bruce Fields break; 3459f7a4d872SJ. Bruce Fields default: 3460f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34611da177e4SLinus Torvalds } 34621da177e4SLinus Torvalds status = nfs_ok; 34631da177e4SLinus Torvalds out: 34641da177e4SLinus Torvalds return status; 34651da177e4SLinus Torvalds } 34661da177e4SLinus Torvalds 3467e1ca12dfSBryan Schumaker static __be32 3468dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3469e1ca12dfSBryan Schumaker { 3470fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3471e1ca12dfSBryan Schumaker return nfserr_locks_held; 3472e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3473e1ca12dfSBryan Schumaker return nfs_ok; 3474e1ca12dfSBryan Schumaker } 3475e1ca12dfSBryan Schumaker 3476e1ca12dfSBryan Schumaker /* 347717456804SBryan Schumaker * Test if the stateid is valid 347817456804SBryan Schumaker */ 347917456804SBryan Schumaker __be32 348017456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 348117456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 348217456804SBryan Schumaker { 348303cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 348403cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 348503cfb420SBryan Schumaker 348603cfb420SBryan Schumaker nfs4_lock_state(); 348703cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 348803cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 348903cfb420SBryan Schumaker nfs4_unlock_state(); 349003cfb420SBryan Schumaker 349117456804SBryan Schumaker return nfs_ok; 349217456804SBryan Schumaker } 349317456804SBryan Schumaker 3494e1ca12dfSBryan Schumaker __be32 3495e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3496e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3497e1ca12dfSBryan Schumaker { 3498e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34992da1cec7SJ. Bruce Fields struct nfs4_stid *s; 350038c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35012da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3502e1ca12dfSBryan Schumaker 3503e1ca12dfSBryan Schumaker nfs4_lock_state(); 350438c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35052da1cec7SJ. Bruce Fields if (!s) 3506e1ca12dfSBryan Schumaker goto out; 35072da1cec7SJ. Bruce Fields switch (s->sc_type) { 35082da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3509e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3510e1ca12dfSBryan Schumaker goto out; 35112da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35122da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35132da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35142da1cec7SJ. Bruce Fields if (ret) 3515e1ca12dfSBryan Schumaker goto out; 35162da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35172da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35182da1cec7SJ. Bruce Fields else 35192da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3520f7a4d872SJ. Bruce Fields break; 3521f7a4d872SJ. Bruce Fields default: 3522f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3523e1ca12dfSBryan Schumaker } 3524e1ca12dfSBryan Schumaker out: 3525e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3526e1ca12dfSBryan Schumaker return ret; 3527e1ca12dfSBryan Schumaker } 3528e1ca12dfSBryan Schumaker 35294c4cd222SNeilBrown static inline int 35304c4cd222SNeilBrown setlkflg (int type) 35314c4cd222SNeilBrown { 35324c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35334c4cd222SNeilBrown RD_STATE : WR_STATE; 35344c4cd222SNeilBrown } 35351da177e4SLinus Torvalds 3536dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3537c0a5d93eSJ. Bruce Fields { 3538c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3539c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3540c0a5d93eSJ. Bruce Fields __be32 status; 3541c0a5d93eSJ. Bruce Fields 3542c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3543c0a5d93eSJ. Bruce Fields if (status) 3544c0a5d93eSJ. Bruce Fields return status; 3545f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3546f7a4d872SJ. Bruce Fields /* 3547f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3548f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3549f7a4d872SJ. Bruce Fields */ 3550f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3551f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3552f7a4d872SJ. Bruce Fields if (status) 3553f7a4d872SJ. Bruce Fields return status; 3554f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3555c0a5d93eSJ. Bruce Fields } 3556c0a5d93eSJ. Bruce Fields 35571da177e4SLinus Torvalds /* 35581da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35591da177e4SLinus Torvalds */ 3560b37ad28bSAl Viro static __be32 3561dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35622288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3563dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35641da177e4SLinus Torvalds { 35650836f587SJ. Bruce Fields __be32 status; 356638c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35671da177e4SLinus Torvalds 35688c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35698c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35701da177e4SLinus Torvalds 35711da177e4SLinus Torvalds *stpp = NULL; 357238c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3573c0a5d93eSJ. Bruce Fields if (status) 3574c0a5d93eSJ. Bruce Fields return status; 357538c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3576c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35771da177e4SLinus Torvalds 3578c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35791da177e4SLinus Torvalds } 35801da177e4SLinus Torvalds 3581dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3582c0a5d93eSJ. Bruce Fields { 3583c0a5d93eSJ. Bruce Fields __be32 status; 3584c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35851da177e4SLinus Torvalds 3586c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35872288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35880836f587SJ. Bruce Fields if (status) 35890836f587SJ. Bruce Fields return status; 3590c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3591dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3592c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35933a4f98bbSNeilBrown return nfs_ok; 35941da177e4SLinus Torvalds } 35951da177e4SLinus Torvalds 3596b37ad28bSAl Viro __be32 3597ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3598a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35991da177e4SLinus Torvalds { 3600b37ad28bSAl Viro __be32 status; 3601fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3602dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36031da177e4SLinus Torvalds 36041da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3605ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3606ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36071da177e4SLinus Torvalds 3608ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3609a8cddc5dSJ. Bruce Fields if (status) 3610a8cddc5dSJ. Bruce Fields return status; 36111da177e4SLinus Torvalds 36121da177e4SLinus Torvalds nfs4_lock_state(); 36131da177e4SLinus Torvalds 36149072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3615ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36162288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36179072d5c6SJ. Bruce Fields if (status) 36181da177e4SLinus Torvalds goto out; 3619fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 362068b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3621dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 362268b66e82SJ. Bruce Fields goto out; 3623dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3624dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3625dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36268c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3627dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3628c7b9a459SNeilBrown 36292a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 363068b66e82SJ. Bruce Fields status = nfs_ok; 36311da177e4SLinus Torvalds out: 36325ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36331da177e4SLinus Torvalds nfs4_unlock_state(); 36341da177e4SLinus Torvalds return status; 36351da177e4SLinus Torvalds } 36361da177e4SLinus Torvalds 36376409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36381da177e4SLinus Torvalds { 36396409a5a6SJ. Bruce Fields if (!test_bit(access, &stp->st_access_bmap)) 36406409a5a6SJ. Bruce Fields return; 36416409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 36426409a5a6SJ. Bruce Fields __clear_bit(access, &stp->st_access_bmap); 3643f197c271SJ. Bruce Fields } 36446409a5a6SJ. Bruce Fields 36456409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36466409a5a6SJ. Bruce Fields { 36476409a5a6SJ. Bruce Fields switch (to_access) { 36486409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36496409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36506409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36516409a5a6SJ. Bruce Fields break; 36526409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36536409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36546409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36556409a5a6SJ. Bruce Fields break; 36566409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36576409a5a6SJ. Bruce Fields break; 36586409a5a6SJ. Bruce Fields default: 36596409a5a6SJ. Bruce Fields BUG(); 36601da177e4SLinus Torvalds } 36611da177e4SLinus Torvalds } 36621da177e4SLinus Torvalds 36631da177e4SLinus Torvalds static void 36641da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 36651da177e4SLinus Torvalds { 36661da177e4SLinus Torvalds int i; 36671da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36681da177e4SLinus Torvalds if ((i & deny) != i) 36691da177e4SLinus Torvalds __clear_bit(i, bmap); 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds } 36721da177e4SLinus Torvalds 3673b37ad28bSAl Viro __be32 3674ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3675ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3676a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36771da177e4SLinus Torvalds { 3678b37ad28bSAl Viro __be32 status; 3679dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36801da177e4SLinus Torvalds 36811da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3682ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3683ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36841da177e4SLinus Torvalds 3685c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36862c8bd7e0SBenny Halevy if (od->od_deleg_want) 36872c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36882c8bd7e0SBenny Halevy od->od_deleg_want); 36891da177e4SLinus Torvalds 36901da177e4SLinus Torvalds nfs4_lock_state(); 3691c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3692c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36939072d5c6SJ. Bruce Fields if (status) 36941da177e4SLinus Torvalds goto out; 36951da177e4SLinus Torvalds status = nfserr_inval; 36961da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 36971da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 36981da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36991da177e4SLinus Torvalds goto out; 37001da177e4SLinus Torvalds } 37011da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 37021da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37031da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37041da177e4SLinus Torvalds goto out; 37051da177e4SLinus Torvalds } 37066409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37071da177e4SLinus Torvalds 37081da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 37091da177e4SLinus Torvalds 3710dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3711dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37121da177e4SLinus Torvalds status = nfs_ok; 37131da177e4SLinus Torvalds out: 37145ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37151da177e4SLinus Torvalds nfs4_unlock_state(); 37161da177e4SLinus Torvalds return status; 37171da177e4SLinus Torvalds } 37181da177e4SLinus Torvalds 371938c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 372038c387b5SJ. Bruce Fields { 372138c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 372238c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 372338c387b5SJ. Bruce Fields 372438c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 372538c387b5SJ. Bruce Fields return; 372638c387b5SJ. Bruce Fields oo = openowner(so); 372738c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 372838c387b5SJ. Bruce Fields if (!s) 372938c387b5SJ. Bruce Fields return; 373038c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 373138c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 373238c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 373338c387b5SJ. Bruce Fields return; 373438c387b5SJ. Bruce Fields } 373538c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3736f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3737f7a4d872SJ. Bruce Fields } 3738f7a4d872SJ. Bruce Fields 3739f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3740f7a4d872SJ. Bruce Fields { 3741f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3742f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 374338c387b5SJ. Bruce Fields } 374438c387b5SJ. Bruce Fields 37451da177e4SLinus Torvalds /* 37461da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37471da177e4SLinus Torvalds */ 3748b37ad28bSAl Viro __be32 3749ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3750a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37511da177e4SLinus Torvalds { 3752b37ad28bSAl Viro __be32 status; 3753fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3754dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37551da177e4SLinus Torvalds 37561da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3757ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3758ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37591da177e4SLinus Torvalds 37601da177e4SLinus Torvalds nfs4_lock_state(); 3761f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3762f7a4d872SJ. Bruce Fields &close->cl_stateid, 3763f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3764f7a4d872SJ. Bruce Fields &stp); 37659072d5c6SJ. Bruce Fields if (status) 37661da177e4SLinus Torvalds goto out; 3767fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37681da177e4SLinus Torvalds status = nfs_ok; 3769dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3770dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37711da177e4SLinus Torvalds 3772f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 377338c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 377404ef5954SJ. Bruce Fields 377504ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 377604ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 377704ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 377804ef5954SJ. Bruce Fields */ 3779fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3780fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 37811da177e4SLinus Torvalds out: 37825ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37831da177e4SLinus Torvalds nfs4_unlock_state(); 37841da177e4SLinus Torvalds return status; 37851da177e4SLinus Torvalds } 37861da177e4SLinus Torvalds 3787b37ad28bSAl Viro __be32 3788ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3789ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37901da177e4SLinus Torvalds { 3791203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3792203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 379338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3794203a8c8eSJ. Bruce Fields struct inode *inode; 3795b37ad28bSAl Viro __be32 status; 37961da177e4SLinus Torvalds 3797ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3798203a8c8eSJ. Bruce Fields return status; 3799203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds nfs4_lock_state(); 380238c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 380338c2f4b1SJ. Bruce Fields if (status) 3804203a8c8eSJ. Bruce Fields goto out; 380538c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3806d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3807203a8c8eSJ. Bruce Fields if (status) 3808203a8c8eSJ. Bruce Fields goto out; 3809203a8c8eSJ. Bruce Fields 3810203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38111da177e4SLinus Torvalds out: 3812203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3813203a8c8eSJ. Bruce Fields 38141da177e4SLinus Torvalds return status; 38151da177e4SLinus Torvalds } 38161da177e4SLinus Torvalds 38171da177e4SLinus Torvalds 38181da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38191da177e4SLinus Torvalds 3820009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3821009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3822009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38231da177e4SLinus Torvalds 382487df4de8SBenny Halevy static inline u64 382587df4de8SBenny Halevy end_offset(u64 start, u64 len) 382687df4de8SBenny Halevy { 382787df4de8SBenny Halevy u64 end; 382887df4de8SBenny Halevy 382987df4de8SBenny Halevy end = start + len; 383087df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 383187df4de8SBenny Halevy } 383287df4de8SBenny Halevy 383387df4de8SBenny Halevy /* last octet in a range */ 383487df4de8SBenny Halevy static inline u64 383587df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 383687df4de8SBenny Halevy { 383787df4de8SBenny Halevy u64 end; 383887df4de8SBenny Halevy 383987df4de8SBenny Halevy BUG_ON(!len); 384087df4de8SBenny Halevy end = start + len; 384187df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 384287df4de8SBenny Halevy } 384387df4de8SBenny Halevy 3844009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38451da177e4SLinus Torvalds { 38461da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38471da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3848009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38491da177e4SLinus Torvalds } 38501da177e4SLinus Torvalds 3851009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38521da177e4SLinus Torvalds 38531da177e4SLinus Torvalds /* 38541da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38551da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38561da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38571da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38581da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38591da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38601da177e4SLinus Torvalds */ 38611da177e4SLinus Torvalds static inline void 38621da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38631da177e4SLinus Torvalds { 38641da177e4SLinus Torvalds if (lock->fl_start < 0) 38651da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38661da177e4SLinus Torvalds if (lock->fl_end < 0) 38671da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38681da177e4SLinus Torvalds } 38691da177e4SLinus Torvalds 3870d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3871d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38727b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3873d5b9026aSNeilBrown }; 38741da177e4SLinus Torvalds 38751da177e4SLinus Torvalds static inline void 38761da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38771da177e4SLinus Torvalds { 3878fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38791da177e4SLinus Torvalds 3880d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3881fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3882fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3883fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38847c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38857c13f344SJ. Bruce Fields /* We just don't care that much */ 38867c13f344SJ. Bruce Fields goto nevermind; 3887fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3888fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3889d5b9026aSNeilBrown } else { 38907c13f344SJ. Bruce Fields nevermind: 38917c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38927c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3893d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3894d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38951da177e4SLinus Torvalds } 38961da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 389787df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 389887df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38991da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39001da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39011da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39021da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39031da177e4SLinus Torvalds } 39041da177e4SLinus Torvalds 3905b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3906b93d87c1SJ. Bruce Fields { 3907b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3908b93d87c1SJ. Bruce Fields 3909b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3910b93d87c1SJ. Bruce Fields return false; 3911b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3912b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3913b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3914b93d87c1SJ. Bruce Fields } 3915b93d87c1SJ. Bruce Fields 3916fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3917fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39181da177e4SLinus Torvalds struct xdr_netobj *owner) 39191da177e4SLinus Torvalds { 3920009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3921b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39221da177e4SLinus Torvalds 3923009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3924b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3925b93d87c1SJ. Bruce Fields return lo; 39261da177e4SLinus Torvalds } 39271da177e4SLinus Torvalds return NULL; 39281da177e4SLinus Torvalds } 39291da177e4SLinus Torvalds 3930dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3931ff194bd9SJ. Bruce Fields { 3932009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3933009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3934009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3935009673b4SJ. Bruce Fields 393616bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3937009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3938fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3939ff194bd9SJ. Bruce Fields } 3940ff194bd9SJ. Bruce Fields 39411da177e4SLinus Torvalds /* 39421da177e4SLinus Torvalds * Alloc a lock owner structure. 39431da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 394425985edcSLucas De Marchi * occurred. 39451da177e4SLinus Torvalds * 394616bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39471da177e4SLinus Torvalds */ 39481da177e4SLinus Torvalds 3949fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3950dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3951fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39521da177e4SLinus Torvalds 3953fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3954fe0750e5SJ. Bruce Fields if (!lo) 39551da177e4SLinus Torvalds return NULL; 3956fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3957fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3958b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3959b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3960fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3961fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3962fe0750e5SJ. Bruce Fields return lo; 39631da177e4SLinus Torvalds } 39641da177e4SLinus Torvalds 3965dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3966dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39671da177e4SLinus Torvalds { 3968dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3969d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39701da177e4SLinus Torvalds 3971996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39725ac049acSNeilBrown if (stp == NULL) 39736136d2b4SJ. Bruce Fields return NULL; 3974996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39758beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3976fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3977fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 397813cd2184SNeilBrown get_nfs4_file(fp); 39791da177e4SLinus Torvalds stp->st_file = fp; 39800997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39811da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39824c4cd222SNeilBrown stp->st_openstp = open_stp; 39831da177e4SLinus Torvalds return stp; 39841da177e4SLinus Torvalds } 39851da177e4SLinus Torvalds 3986fd39ca9aSNeilBrown static int 39871da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39881da177e4SLinus Torvalds { 398987df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39901da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39911da177e4SLinus Torvalds } 39921da177e4SLinus Torvalds 3993dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39940997b173SJ. Bruce Fields { 39950997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39960997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39970997b173SJ. Bruce Fields 39980997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39990997b173SJ. Bruce Fields return; 40000997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 40010997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 40020997b173SJ. Bruce Fields } 40030997b173SJ. Bruce Fields 40042355c596SJ. 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) 400564a284d0SJ. Bruce Fields { 400664a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 400764a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 400864a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 400964a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 401064a284d0SJ. Bruce Fields unsigned int strhashval; 401164a284d0SJ. Bruce Fields 401264a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 401364a284d0SJ. Bruce Fields if (lo) { 401464a284d0SJ. Bruce Fields if (!cstate->minorversion) 401564a284d0SJ. Bruce Fields return nfserr_bad_seqid; 401664a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 401764a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 401864a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 401964a284d0SJ. Bruce Fields return nfs_ok; 402064a284d0SJ. Bruce Fields } 402116bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 402264a284d0SJ. Bruce Fields &lock->v.new.owner); 402364a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 402464a284d0SJ. Bruce Fields if (lo == NULL) 402564a284d0SJ. Bruce Fields return nfserr_jukebox; 402664a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 402764a284d0SJ. Bruce Fields if (*lst == NULL) { 402864a284d0SJ. Bruce Fields release_lockowner(lo); 402964a284d0SJ. Bruce Fields return nfserr_jukebox; 403064a284d0SJ. Bruce Fields } 403164a284d0SJ. Bruce Fields *new = true; 403264a284d0SJ. Bruce Fields return nfs_ok; 403364a284d0SJ. Bruce Fields } 403464a284d0SJ. Bruce Fields 40351da177e4SLinus Torvalds /* 40361da177e4SLinus Torvalds * LOCK operation 40371da177e4SLinus Torvalds */ 4038b37ad28bSAl Viro __be32 4039ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4040a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40411da177e4SLinus Torvalds { 4042fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4043fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4044dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40457d947842SJ. Bruce Fields struct file *filp = NULL; 40461da177e4SLinus Torvalds struct file_lock file_lock; 40478dc7c311SAndy Adamson struct file_lock conflock; 4048b37ad28bSAl Viro __be32 status = 0; 404964a284d0SJ. Bruce Fields bool new_state = false; 4050b34f27aaSJ. Bruce Fields int lkflg; 4051b8dd7b9aSAl Viro int err; 40521da177e4SLinus Torvalds 40531da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40541da177e4SLinus Torvalds (long long) lock->lk_offset, 40551da177e4SLinus Torvalds (long long) lock->lk_length); 40561da177e4SLinus Torvalds 40571da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40581da177e4SLinus Torvalds return nfserr_inval; 40591da177e4SLinus Torvalds 4060ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40618837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4062a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4063a6f6ef2fSAndy Adamson return status; 4064a6f6ef2fSAndy Adamson } 4065a6f6ef2fSAndy Adamson 40661da177e4SLinus Torvalds nfs4_lock_state(); 40671da177e4SLinus Torvalds 40681da177e4SLinus Torvalds if (lock->lk_is_new) { 40691da177e4SLinus Torvalds /* 40701da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4071893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4072893f8770SNeilBrown * lock stateid. 40731da177e4SLinus Torvalds */ 4074dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40751da177e4SLinus Torvalds 4076684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4077684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4078684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4079684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4080684e5638SJ. Bruce Fields sizeof(clientid_t)); 4081684e5638SJ. Bruce Fields 40821da177e4SLinus Torvalds status = nfserr_stale_clientid; 4083684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40841da177e4SLinus Torvalds goto out; 40851da177e4SLinus Torvalds 40861da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4087c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40881da177e4SLinus Torvalds lock->lk_new_open_seqid, 40891da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4090c0a5d93eSJ. Bruce Fields &open_stp); 409137515177SNeilBrown if (status) 40921da177e4SLinus Torvalds goto out; 4093fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4094b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4095684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4096b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4097b34f27aaSJ. Bruce Fields goto out; 409864a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 409964a284d0SJ. Bruce Fields &lock_stp, &new_state); 410064a284d0SJ. Bruce Fields if (status) 41011da177e4SLinus Torvalds goto out; 41021da177e4SLinus Torvalds } else { 41031da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4104dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41051da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41061da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41072288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41081da177e4SLinus Torvalds if (status) 41091da177e4SLinus Torvalds goto out; 411064a284d0SJ. Bruce Fields } 4111fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41121da177e4SLinus Torvalds 4113b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4114b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4115b34f27aaSJ. Bruce Fields if (status) 4116b34f27aaSJ. Bruce Fields goto out; 4117b34f27aaSJ. Bruce Fields 41180dd395dcSNeilBrown status = nfserr_grace; 4119af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41200dd395dcSNeilBrown goto out; 41210dd395dcSNeilBrown status = nfserr_no_grace; 4122af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41230dd395dcSNeilBrown goto out; 41240dd395dcSNeilBrown 41251da177e4SLinus Torvalds locks_init_lock(&file_lock); 41261da177e4SLinus Torvalds switch (lock->lk_type) { 41271da177e4SLinus Torvalds case NFS4_READ_LT: 41281da177e4SLinus Torvalds case NFS4_READW_LT: 4129f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41300997b173SJ. Bruce Fields if (filp) 41310997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41321da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41331da177e4SLinus Torvalds break; 41341da177e4SLinus Torvalds case NFS4_WRITE_LT: 41351da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4136f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41370997b173SJ. Bruce Fields if (filp) 41380997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41391da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41401da177e4SLinus Torvalds break; 41411da177e4SLinus Torvalds default: 41421da177e4SLinus Torvalds status = nfserr_inval; 41431da177e4SLinus Torvalds goto out; 41441da177e4SLinus Torvalds } 4145f9d7562fSJ. Bruce Fields if (!filp) { 4146f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4147f9d7562fSJ. Bruce Fields goto out; 4148f9d7562fSJ. Bruce Fields } 4149b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41501da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41511da177e4SLinus Torvalds file_lock.fl_file = filp; 41521da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4153d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41541da177e4SLinus Torvalds 41551da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 415687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41571da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41581da177e4SLinus Torvalds 41591da177e4SLinus Torvalds /* 41601da177e4SLinus Torvalds * Try to lock the file in the VFS. 41611da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41621da177e4SLinus Torvalds */ 41631da177e4SLinus Torvalds 4164529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4165b8dd7b9aSAl Viro switch (-err) { 41661da177e4SLinus Torvalds case 0: /* success! */ 4167dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4168dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41691da177e4SLinus Torvalds sizeof(stateid_t)); 4170b8dd7b9aSAl Viro status = 0; 4171eb76b3fdSAndy Adamson break; 4172eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4173eb76b3fdSAndy Adamson status = nfserr_denied; 4174eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4175eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4176eb76b3fdSAndy Adamson break; 41771da177e4SLinus Torvalds case (EDEADLK): 41781da177e4SLinus Torvalds status = nfserr_deadlock; 4179eb76b3fdSAndy Adamson break; 41801da177e4SLinus Torvalds default: 4181fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41823e772463SJ. Bruce Fields status = nfserrno(err); 4183eb76b3fdSAndy Adamson break; 41841da177e4SLinus Torvalds } 41851da177e4SLinus Torvalds out: 418664a284d0SJ. Bruce Fields if (status && new_state) 4187f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41885ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41891da177e4SLinus Torvalds nfs4_unlock_state(); 41901da177e4SLinus Torvalds return status; 41911da177e4SLinus Torvalds } 41921da177e4SLinus Torvalds 41931da177e4SLinus Torvalds /* 419455ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 419555ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 419655ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 419755ef1274SJ. Bruce Fields * inode operation.) 419855ef1274SJ. Bruce Fields */ 419955ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 420055ef1274SJ. Bruce Fields { 420155ef1274SJ. Bruce Fields struct file *file; 420255ef1274SJ. Bruce Fields int err; 420355ef1274SJ. Bruce Fields 420455ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 420555ef1274SJ. Bruce Fields if (err) 420655ef1274SJ. Bruce Fields return err; 420755ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 420855ef1274SJ. Bruce Fields nfsd_close(file); 420955ef1274SJ. Bruce Fields return err; 421055ef1274SJ. Bruce Fields } 421155ef1274SJ. Bruce Fields 421255ef1274SJ. Bruce Fields /* 42131da177e4SLinus Torvalds * LOCKT operation 42141da177e4SLinus Torvalds */ 4215b37ad28bSAl Viro __be32 4216ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4217ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42181da177e4SLinus Torvalds { 42191da177e4SLinus Torvalds struct inode *inode; 42201da177e4SLinus Torvalds struct file_lock file_lock; 4221fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4222fd85b817SMarc Eshel int error; 4223b37ad28bSAl Viro __be32 status; 42241da177e4SLinus Torvalds 4225af558e33SJ. Bruce Fields if (locks_in_grace()) 42261da177e4SLinus Torvalds return nfserr_grace; 42271da177e4SLinus Torvalds 42281da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42291da177e4SLinus Torvalds return nfserr_inval; 42301da177e4SLinus Torvalds 42311da177e4SLinus Torvalds nfs4_lock_state(); 42321da177e4SLinus Torvalds 42331da177e4SLinus Torvalds status = nfserr_stale_clientid; 423460adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42351da177e4SLinus Torvalds goto out; 42361da177e4SLinus Torvalds 423775c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42381da177e4SLinus Torvalds goto out; 42391da177e4SLinus Torvalds 4240ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42411da177e4SLinus Torvalds locks_init_lock(&file_lock); 42421da177e4SLinus Torvalds switch (lockt->lt_type) { 42431da177e4SLinus Torvalds case NFS4_READ_LT: 42441da177e4SLinus Torvalds case NFS4_READW_LT: 42451da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42461da177e4SLinus Torvalds break; 42471da177e4SLinus Torvalds case NFS4_WRITE_LT: 42481da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42491da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42501da177e4SLinus Torvalds break; 42511da177e4SLinus Torvalds default: 42522fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42531da177e4SLinus Torvalds status = nfserr_inval; 42541da177e4SLinus Torvalds goto out; 42551da177e4SLinus Torvalds } 42561da177e4SLinus Torvalds 4257fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4258fe0750e5SJ. Bruce Fields if (lo) 4259fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42601da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42611da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42621da177e4SLinus Torvalds 42631da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 426487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42651da177e4SLinus Torvalds 42661da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42671da177e4SLinus Torvalds 42681da177e4SLinus Torvalds status = nfs_ok; 426955ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4270fd85b817SMarc Eshel if (error) { 4271fd85b817SMarc Eshel status = nfserrno(error); 4272fd85b817SMarc Eshel goto out; 4273fd85b817SMarc Eshel } 42749d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42751da177e4SLinus Torvalds status = nfserr_denied; 42769d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42771da177e4SLinus Torvalds } 42781da177e4SLinus Torvalds out: 42791da177e4SLinus Torvalds nfs4_unlock_state(); 42801da177e4SLinus Torvalds return status; 42811da177e4SLinus Torvalds } 42821da177e4SLinus Torvalds 4283b37ad28bSAl Viro __be32 4284ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4285a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42861da177e4SLinus Torvalds { 4287dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42881da177e4SLinus Torvalds struct file *filp = NULL; 42891da177e4SLinus Torvalds struct file_lock file_lock; 4290b37ad28bSAl Viro __be32 status; 4291b8dd7b9aSAl Viro int err; 42921da177e4SLinus Torvalds 42931da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42941da177e4SLinus Torvalds (long long) locku->lu_offset, 42951da177e4SLinus Torvalds (long long) locku->lu_length); 42961da177e4SLinus Torvalds 42971da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42981da177e4SLinus Torvalds return nfserr_inval; 42991da177e4SLinus Torvalds 43001da177e4SLinus Torvalds nfs4_lock_state(); 43011da177e4SLinus Torvalds 43029072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43032288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43049072d5c6SJ. Bruce Fields if (status) 43051da177e4SLinus Torvalds goto out; 4306f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4307f9d7562fSJ. Bruce Fields if (!filp) { 4308f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4309f9d7562fSJ. Bruce Fields goto out; 4310f9d7562fSJ. Bruce Fields } 43111da177e4SLinus Torvalds BUG_ON(!filp); 43121da177e4SLinus Torvalds locks_init_lock(&file_lock); 43131da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4314fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43151da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43161da177e4SLinus Torvalds file_lock.fl_file = filp; 43171da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4318d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43191da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43201da177e4SLinus Torvalds 432187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43221da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43231da177e4SLinus Torvalds 43241da177e4SLinus Torvalds /* 43251da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43261da177e4SLinus Torvalds */ 4327fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4328b8dd7b9aSAl Viro if (err) { 4329fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43301da177e4SLinus Torvalds goto out_nfserr; 43311da177e4SLinus Torvalds } 43321da177e4SLinus Torvalds /* 43331da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43341da177e4SLinus Torvalds */ 4335dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4336dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43371da177e4SLinus Torvalds 43381da177e4SLinus Torvalds out: 433971c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43401da177e4SLinus Torvalds nfs4_unlock_state(); 43411da177e4SLinus Torvalds return status; 43421da177e4SLinus Torvalds 43431da177e4SLinus Torvalds out_nfserr: 4344b8dd7b9aSAl Viro status = nfserrno(err); 43451da177e4SLinus Torvalds goto out; 43461da177e4SLinus Torvalds } 43471da177e4SLinus Torvalds 43481da177e4SLinus Torvalds /* 43491da177e4SLinus Torvalds * returns 43501da177e4SLinus Torvalds * 1: locks held by lockowner 43511da177e4SLinus Torvalds * 0: no locks held by lockowner 43521da177e4SLinus Torvalds */ 43531da177e4SLinus Torvalds static int 4354fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43551da177e4SLinus Torvalds { 43561da177e4SLinus Torvalds struct file_lock **flpp; 4357f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43581da177e4SLinus Torvalds int status = 0; 43591da177e4SLinus Torvalds 4360b89f4321SArnd Bergmann lock_flocks(); 43611da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4362796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43631da177e4SLinus Torvalds status = 1; 43641da177e4SLinus Torvalds goto out; 43651da177e4SLinus Torvalds } 4366796dadfdSJ. Bruce Fields } 43671da177e4SLinus Torvalds out: 4368b89f4321SArnd Bergmann unlock_flocks(); 43691da177e4SLinus Torvalds return status; 43701da177e4SLinus Torvalds } 43711da177e4SLinus Torvalds 4372b37ad28bSAl Viro __be32 4373b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4374b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4375b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43761da177e4SLinus Torvalds { 43771da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43783e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4379fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4380dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43811da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43823e9e3dbeSNeilBrown struct list_head matches; 438316bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4384b37ad28bSAl Viro __be32 status; 43851da177e4SLinus Torvalds 43861da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43871da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43881da177e4SLinus Torvalds 43891da177e4SLinus Torvalds /* XXX check for lease expiration */ 43901da177e4SLinus Torvalds 43911da177e4SLinus Torvalds status = nfserr_stale_clientid; 4392849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43931da177e4SLinus Torvalds return status; 43941da177e4SLinus Torvalds 43951da177e4SLinus Torvalds nfs4_lock_state(); 43961da177e4SLinus Torvalds 43971da177e4SLinus Torvalds status = nfserr_locks_held; 43983e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 439906f1f864SJ. Bruce Fields 440016bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 440116bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 440216bfdaafSJ. Bruce Fields continue; 4403599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44043e9e3dbeSNeilBrown continue; 44053e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4406ea1da636SNeilBrown st_perstateowner) { 4407fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4408fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44091da177e4SLinus Torvalds goto out; 4410fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44111da177e4SLinus Torvalds } 44123e9e3dbeSNeilBrown } 44133e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44143e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44153e9e3dbeSNeilBrown * have been checked. */ 44161da177e4SLinus Torvalds status = nfs_ok; 44170fa822e4SNeilBrown while (!list_empty(&matches)) { 4418fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4419fe0750e5SJ. Bruce Fields lo_list); 44200fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44210fa822e4SNeilBrown * for openowners. */ 4422fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4423fe0750e5SJ. Bruce Fields release_lockowner(lo); 44241da177e4SLinus Torvalds } 44251da177e4SLinus Torvalds out: 44261da177e4SLinus Torvalds nfs4_unlock_state(); 44271da177e4SLinus Torvalds return status; 44281da177e4SLinus Torvalds } 44291da177e4SLinus Torvalds 44301da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4431a55370a3SNeilBrown alloc_reclaim(void) 44321da177e4SLinus Torvalds { 4433a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44341da177e4SLinus Torvalds } 44351da177e4SLinus Torvalds 4436c7b9a459SNeilBrown int 4437a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4438c7b9a459SNeilBrown { 4439c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4440c7b9a459SNeilBrown struct nfs4_client *clp; 4441c7b9a459SNeilBrown 4442e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4443393d8ed8SJ. Bruce Fields if (!clp) 4444393d8ed8SJ. Bruce Fields return 0; 4445a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4446c7b9a459SNeilBrown } 4447c7b9a459SNeilBrown 44481da177e4SLinus Torvalds /* 44491da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44501da177e4SLinus Torvalds */ 4451190e4fbfSNeilBrown int 4452190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44531da177e4SLinus Torvalds { 44541da177e4SLinus Torvalds unsigned int strhashval; 44551da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44561da177e4SLinus Torvalds 4457a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4458a55370a3SNeilBrown crp = alloc_reclaim(); 44591da177e4SLinus Torvalds if (!crp) 44601da177e4SLinus Torvalds return 0; 4461a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44621da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44631da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4464a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44651da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44661da177e4SLinus Torvalds return 1; 44671da177e4SLinus Torvalds } 44681da177e4SLinus Torvalds 44692a4317c5SJeff Layton void 44701da177e4SLinus Torvalds nfs4_release_reclaim(void) 44711da177e4SLinus Torvalds { 44721da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44731da177e4SLinus Torvalds int i; 44741da177e4SLinus Torvalds 44751da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44761da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44771da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44781da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44791da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44801da177e4SLinus Torvalds kfree(crp); 44811da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44821da177e4SLinus Torvalds } 44831da177e4SLinus Torvalds } 44841da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44851da177e4SLinus Torvalds } 44861da177e4SLinus Torvalds 44871da177e4SLinus Torvalds /* 44881da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 44892a4317c5SJeff Layton struct nfs4_client_reclaim * 4490a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 44911da177e4SLinus Torvalds { 44921da177e4SLinus Torvalds unsigned int strhashval; 44931da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44941da177e4SLinus Torvalds 4495a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4496a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4497a55370a3SNeilBrown clp->cl_recdir); 44981da177e4SLinus Torvalds 44991da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4500a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45011da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4502a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45031da177e4SLinus Torvalds return crp; 45041da177e4SLinus Torvalds } 45051da177e4SLinus Torvalds } 45061da177e4SLinus Torvalds return NULL; 45071da177e4SLinus Torvalds } 45081da177e4SLinus Torvalds 45091da177e4SLinus Torvalds /* 45101da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45111da177e4SLinus Torvalds */ 4512b37ad28bSAl Viro __be32 45131da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45141da177e4SLinus Torvalds { 4515a52d726bSJeff Layton struct nfs4_client *clp; 4516a52d726bSJeff Layton 4517a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4518a52d726bSJeff Layton clp = find_confirmed_client(clid); 4519a52d726bSJeff Layton if (clp == NULL) 4520a52d726bSJeff Layton return nfserr_reclaim_bad; 4521a52d726bSJeff Layton 4522a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45231da177e4SLinus Torvalds } 45241da177e4SLinus Torvalds 452565178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 452665178db4SBryan Schumaker 452765178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 452865178db4SBryan Schumaker { 452965178db4SBryan Schumaker struct nfs4_client *clp, *next; 453065178db4SBryan Schumaker int count = 0; 453165178db4SBryan Schumaker 453265178db4SBryan Schumaker nfs4_lock_state(); 453365178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45342a4317c5SJeff Layton nfsd4_client_record_remove(clp); 453565178db4SBryan Schumaker expire_client(clp); 453665178db4SBryan Schumaker if (++count == num) 453765178db4SBryan Schumaker break; 453865178db4SBryan Schumaker } 453965178db4SBryan Schumaker nfs4_unlock_state(); 454065178db4SBryan Schumaker 454165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 454265178db4SBryan Schumaker } 454365178db4SBryan Schumaker 454465178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 454565178db4SBryan Schumaker { 454665178db4SBryan Schumaker release_lockowner(lockowner(sop)); 454765178db4SBryan Schumaker } 454865178db4SBryan Schumaker 454965178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 455065178db4SBryan Schumaker { 455165178db4SBryan Schumaker release_openowner(openowner(sop)); 455265178db4SBryan Schumaker } 455365178db4SBryan Schumaker 4554353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 455565178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 455665178db4SBryan Schumaker { 455765178db4SBryan Schumaker int i, count = 0; 455865178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 455965178db4SBryan Schumaker 456016bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 456116bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 456216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 456316bfdaafSJ. Bruce Fields continue; 456465178db4SBryan Schumaker release_sop(sop); 456565178db4SBryan Schumaker if (++count == num) 456665178db4SBryan Schumaker return count; 456765178db4SBryan Schumaker } 456865178db4SBryan Schumaker } 456965178db4SBryan Schumaker return count; 457065178db4SBryan Schumaker } 457165178db4SBryan Schumaker 457265178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 457365178db4SBryan Schumaker { 457465178db4SBryan Schumaker int count; 457565178db4SBryan Schumaker 457665178db4SBryan Schumaker nfs4_lock_state(); 457716bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 457865178db4SBryan Schumaker nfs4_unlock_state(); 457965178db4SBryan Schumaker 458065178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 458165178db4SBryan Schumaker } 458265178db4SBryan Schumaker 458365178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 458465178db4SBryan Schumaker { 458565178db4SBryan Schumaker int count; 458665178db4SBryan Schumaker 458765178db4SBryan Schumaker nfs4_lock_state(); 458816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 458965178db4SBryan Schumaker nfs4_unlock_state(); 459065178db4SBryan Schumaker 459165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 459265178db4SBryan Schumaker } 459365178db4SBryan Schumaker 459465178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 459565178db4SBryan Schumaker { 459665178db4SBryan Schumaker int i, count = 0; 45972d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 45982d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 459965178db4SBryan Schumaker 460065178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46012d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46022d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 460365178db4SBryan Schumaker deleg_func(dp); 460465178db4SBryan Schumaker if (++count == num) 460565178db4SBryan Schumaker return count; 460665178db4SBryan Schumaker } 460765178db4SBryan Schumaker } 460865178db4SBryan Schumaker } 46092d3475c0SBryan Schumaker 461065178db4SBryan Schumaker return count; 461165178db4SBryan Schumaker } 461265178db4SBryan Schumaker 461365178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 461465178db4SBryan Schumaker { 461565178db4SBryan Schumaker unsigned int count; 461665178db4SBryan Schumaker 461765178db4SBryan Schumaker nfs4_lock_state(); 461865178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 461965178db4SBryan Schumaker nfs4_unlock_state(); 462065178db4SBryan Schumaker 462165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 462265178db4SBryan Schumaker } 462365178db4SBryan Schumaker 462465178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 462565178db4SBryan Schumaker { 462665178db4SBryan Schumaker unsigned int count; 462765178db4SBryan Schumaker 462865178db4SBryan Schumaker nfs4_lock_state(); 462965178db4SBryan Schumaker spin_lock(&recall_lock); 463065178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 463165178db4SBryan Schumaker spin_unlock(&recall_lock); 463265178db4SBryan Schumaker nfs4_unlock_state(); 463365178db4SBryan Schumaker 463465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 463565178db4SBryan Schumaker } 463665178db4SBryan Schumaker 463765178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 463865178db4SBryan Schumaker 4639ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46401da177e4SLinus Torvalds 464172083396SBryan Schumaker void 4642ac4d8ff2SNeilBrown nfs4_state_init(void) 46431da177e4SLinus Torvalds { 464472083396SBryan Schumaker int i; 46451da177e4SLinus Torvalds 46461da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46471da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46481da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46491da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46501da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 465102cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46521da177e4SLinus Torvalds } 46535282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46545282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46551da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46561da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46571da177e4SLinus Torvalds } 465816bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 465916bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46601da177e4SLinus Torvalds } 4661009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4662009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46631da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46641da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46651da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4666ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4667ac4d8ff2SNeilBrown } 4668ac4d8ff2SNeilBrown 4669c2f1a551SMeelap Shah /* 4670c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4671c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4672c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4673c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4674c2f1a551SMeelap Shah * 4675c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4676c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4677c2f1a551SMeelap Shah */ 4678c2f1a551SMeelap Shah static void 4679c2f1a551SMeelap Shah set_max_delegations(void) 4680c2f1a551SMeelap Shah { 4681c2f1a551SMeelap Shah /* 4682c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4683c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4684c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4685c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4686c2f1a551SMeelap Shah */ 4687c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4688c2f1a551SMeelap Shah } 4689c2f1a551SMeelap Shah 4690ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4691ac4d8ff2SNeilBrown 4692a6d6b781SJeff Layton int 4693a6d6b781SJeff Layton nfs4_state_start(void) 4694ac4d8ff2SNeilBrown { 4695b5a1a81eSJ. Bruce Fields int ret; 4696b5a1a81eSJ. Bruce Fields 46972a4317c5SJeff Layton /* 46982a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 46992a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47002a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47012a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47022a4317c5SJeff Layton * basis. 47032a4317c5SJeff Layton */ 47042a4317c5SJeff Layton get_net(&init_net); 47052a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 47061da177e4SLinus Torvalds boot_time = get_seconds(); 4707af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 470833dcc481SJeff Layton grace_ended = false; 47099a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4710e46b498cSJ. Bruce Fields nfsd4_grace); 4711b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4712a6d6b781SJeff Layton if (ret) { 4713a6d6b781SJeff Layton ret = -ENOMEM; 4714a6d6b781SJeff Layton goto out_recovery; 4715a6d6b781SJeff Layton } 471658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4717a6d6b781SJeff Layton if (laundry_wq == NULL) { 4718a6d6b781SJeff Layton ret = -ENOMEM; 4719a6d6b781SJeff Layton goto out_recovery; 4720a6d6b781SJeff Layton } 4721b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4722b5a1a81eSJ. Bruce Fields if (ret) 4723b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4724e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4725c2f1a551SMeelap Shah set_max_delegations(); 4726b5a1a81eSJ. Bruce Fields return 0; 4727b5a1a81eSJ. Bruce Fields out_free_laundry: 4728b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4729a6d6b781SJeff Layton out_recovery: 47302a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47312a4317c5SJeff Layton put_net(&init_net); 4732b5a1a81eSJ. Bruce Fields return ret; 47331da177e4SLinus Torvalds } 47341da177e4SLinus Torvalds 47351da177e4SLinus Torvalds static void 47361da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47371da177e4SLinus Torvalds { 47381da177e4SLinus Torvalds int i; 47391da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47401da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47411da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47421da177e4SLinus Torvalds 47431da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47441da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47451da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47461da177e4SLinus Torvalds expire_client(clp); 47471da177e4SLinus Torvalds } 47481da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47491da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47501da177e4SLinus Torvalds expire_client(clp); 47511da177e4SLinus Torvalds } 47521da177e4SLinus Torvalds } 47531da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47541da177e4SLinus Torvalds spin_lock(&recall_lock); 47551da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47561da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47571da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47581da177e4SLinus Torvalds } 47591da177e4SLinus Torvalds spin_unlock(&recall_lock); 47601da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47611da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47621da177e4SLinus Torvalds unhash_delegation(dp); 47631da177e4SLinus Torvalds } 47641da177e4SLinus Torvalds 47652a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47662a4317c5SJeff Layton put_net(&init_net); 47671da177e4SLinus Torvalds } 47681da177e4SLinus Torvalds 47691da177e4SLinus Torvalds void 47701da177e4SLinus Torvalds nfs4_state_shutdown(void) 47711da177e4SLinus Torvalds { 4772afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47735e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47742c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 47751da177e4SLinus Torvalds nfs4_lock_state(); 47761da177e4SLinus Torvalds __nfs4_state_shutdown(); 47771da177e4SLinus Torvalds nfs4_unlock_state(); 4778c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47791da177e4SLinus Torvalds } 47808b70484cSTigran Mkrtchyan 47818b70484cSTigran Mkrtchyan static void 47828b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47838b70484cSTigran Mkrtchyan { 478437c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 478537c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47868b70484cSTigran Mkrtchyan } 47878b70484cSTigran Mkrtchyan 47888b70484cSTigran Mkrtchyan static void 47898b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47908b70484cSTigran Mkrtchyan { 479137c593c5STigran Mkrtchyan if (cstate->minorversion) { 479237c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 479337c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 479437c593c5STigran Mkrtchyan } 479537c593c5STigran Mkrtchyan } 479637c593c5STigran Mkrtchyan 479737c593c5STigran Mkrtchyan void 479837c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 479937c593c5STigran Mkrtchyan { 480037c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48018b70484cSTigran Mkrtchyan } 48028b70484cSTigran Mkrtchyan 480362cd4a59STigran Mkrtchyan /* 480462cd4a59STigran Mkrtchyan * functions to set current state id 480562cd4a59STigran Mkrtchyan */ 48068b70484cSTigran Mkrtchyan void 48079428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48089428fe1aSTigran Mkrtchyan { 48099428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48109428fe1aSTigran Mkrtchyan } 48119428fe1aSTigran Mkrtchyan 48129428fe1aSTigran Mkrtchyan void 48138b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48148b70484cSTigran Mkrtchyan { 48158b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48168b70484cSTigran Mkrtchyan } 48178b70484cSTigran Mkrtchyan 48188b70484cSTigran Mkrtchyan void 481962cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 482062cd4a59STigran Mkrtchyan { 482162cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 482262cd4a59STigran Mkrtchyan } 482362cd4a59STigran Mkrtchyan 482462cd4a59STigran Mkrtchyan void 482562cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 482662cd4a59STigran Mkrtchyan { 482762cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 482862cd4a59STigran Mkrtchyan } 482962cd4a59STigran Mkrtchyan 483062cd4a59STigran Mkrtchyan /* 483162cd4a59STigran Mkrtchyan * functions to consume current state id 483262cd4a59STigran Mkrtchyan */ 48331e97b519STigran Mkrtchyan 48341e97b519STigran Mkrtchyan void 48359428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48369428fe1aSTigran Mkrtchyan { 48379428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48389428fe1aSTigran Mkrtchyan } 48399428fe1aSTigran Mkrtchyan 48409428fe1aSTigran Mkrtchyan void 48419428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48429428fe1aSTigran Mkrtchyan { 48439428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48449428fe1aSTigran Mkrtchyan } 48459428fe1aSTigran Mkrtchyan 48469428fe1aSTigran Mkrtchyan void 48471e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48481e97b519STigran Mkrtchyan { 48491e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48501e97b519STigran Mkrtchyan } 48511e97b519STigran Mkrtchyan 48521e97b519STigran Mkrtchyan void 48531e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48541e97b519STigran Mkrtchyan { 48551e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48561e97b519STigran Mkrtchyan } 48571e97b519STigran Mkrtchyan 485862cd4a59STigran Mkrtchyan void 48598b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48608b70484cSTigran Mkrtchyan { 48618b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48628b70484cSTigran Mkrtchyan } 48638b70484cSTigran Mkrtchyan 48648b70484cSTigran Mkrtchyan void 486562cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48668b70484cSTigran Mkrtchyan { 486762cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48688b70484cSTigran Mkrtchyan } 486930813e27STigran Mkrtchyan 487030813e27STigran Mkrtchyan void 487130813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 487230813e27STigran Mkrtchyan { 487330813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 487430813e27STigran Mkrtchyan } 487530813e27STigran Mkrtchyan 487630813e27STigran Mkrtchyan void 487730813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 487830813e27STigran Mkrtchyan { 487930813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 488030813e27STigran Mkrtchyan } 4881