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 */ 451f9d7562fSJ. Bruce Fields static void 452f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 453f9d7562fSJ. Bruce Fields int i; 454f9d7562fSJ. Bruce Fields 455f9d7562fSJ. Bruce Fields *access = 0; 456f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 457f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 458f9d7562fSJ. Bruce Fields *access |= i; 459f9d7562fSJ. Bruce Fields } 460f9d7562fSJ. Bruce Fields } 461f9d7562fSJ. Bruce Fields 462f9d7562fSJ. Bruce Fields static void 463f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 464f9d7562fSJ. Bruce Fields int i; 465f9d7562fSJ. Bruce Fields 466f9d7562fSJ. Bruce Fields *deny = 0; 467f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 468f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 469f9d7562fSJ. Bruce Fields *deny |= i ; 470f9d7562fSJ. Bruce Fields } 471f9d7562fSJ. Bruce Fields } 472f9d7562fSJ. Bruce Fields 473f9d7562fSJ. Bruce Fields static int 474dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 475f9d7562fSJ. Bruce Fields unsigned int access, deny; 476f9d7562fSJ. Bruce Fields 477f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 478f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 479f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 480f9d7562fSJ. Bruce Fields return 0; 481f9d7562fSJ. Bruce Fields return 1; 482f9d7562fSJ. Bruce Fields } 483f9d7562fSJ. Bruce Fields 484f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 485f9d7562fSJ. Bruce Fields { 4868f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 487f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 488f9d7562fSJ. Bruce Fields return O_RDONLY; 489f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 490f9d7562fSJ. Bruce Fields return O_WRONLY; 491f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 492f9d7562fSJ. Bruce Fields return O_RDWR; 493f9d7562fSJ. Bruce Fields } 494f9d7562fSJ. Bruce Fields BUG(); 495f9d7562fSJ. Bruce Fields } 496f9d7562fSJ. Bruce Fields 497dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 498529d7b2aSJ. Bruce Fields { 499529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 500529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 501529d7b2aSJ. Bruce Fields } 502529d7b2aSJ. Bruce Fields 503dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 504529d7b2aSJ. Bruce Fields { 505499f3edcSJ. Bruce Fields int i; 5060997b173SJ. Bruce Fields 50723fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 508499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 509499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 510499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 511499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 5124665e2baSJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 513499f3edcSJ. Bruce Fields } 51423fcf2ecSJ. Bruce Fields } 515a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5164665e2baSJ. Bruce Fields stp->st_file = NULL; 5174665e2baSJ. Bruce Fields } 5184665e2baSJ. Bruce Fields 519dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5204665e2baSJ. Bruce Fields { 521529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 522529d7b2aSJ. Bruce Fields } 523529d7b2aSJ. Bruce Fields 524dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 525529d7b2aSJ. Bruce Fields { 526529d7b2aSJ. Bruce Fields struct file *file; 527529d7b2aSJ. Bruce Fields 528529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5296136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 530529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 531529d7b2aSJ. Bruce Fields if (file) 532fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 53338c387b5SJ. Bruce Fields close_generic_stateid(stp); 534529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 535529d7b2aSJ. Bruce Fields } 536529d7b2aSJ. Bruce Fields 537fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 538529d7b2aSJ. Bruce Fields { 539dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 540529d7b2aSJ. Bruce Fields 541fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 542fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 543009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 544fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 545fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 546dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 547529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 548529d7b2aSJ. Bruce Fields } 549529d7b2aSJ. Bruce Fields } 550529d7b2aSJ. Bruce Fields 551fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 552529d7b2aSJ. Bruce Fields { 553fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 554fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 555529d7b2aSJ. Bruce Fields } 556529d7b2aSJ. Bruce Fields 557529d7b2aSJ. Bruce Fields static void 558dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 559529d7b2aSJ. Bruce Fields { 560fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 561529d7b2aSJ. Bruce Fields 562529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 563fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 564fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 565fe0750e5SJ. Bruce Fields release_lockowner(lo); 566529d7b2aSJ. Bruce Fields } 567529d7b2aSJ. Bruce Fields } 568529d7b2aSJ. Bruce Fields 56938c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5702283963fSJ. Bruce Fields { 5712283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5722283963fSJ. Bruce Fields release_stateid_lockowners(stp); 57338c387b5SJ. Bruce Fields close_generic_stateid(stp); 57438c387b5SJ. Bruce Fields } 57538c387b5SJ. Bruce Fields 57638c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 57738c387b5SJ. Bruce Fields { 57838c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5796136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 5802283963fSJ. Bruce Fields free_generic_stateid(stp); 5812283963fSJ. Bruce Fields } 5822283963fSJ. Bruce Fields 583fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 584f1d110caSJ. Bruce Fields { 585dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 586f1d110caSJ. Bruce Fields 587fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 588fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 589fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 590fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 591dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 592f1d110caSJ. Bruce Fields release_open_stateid(stp); 593f1d110caSJ. Bruce Fields } 594f1d110caSJ. Bruce Fields } 595f1d110caSJ. Bruce Fields 596f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 597f7a4d872SJ. Bruce Fields { 598f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 599f7a4d872SJ. Bruce Fields 600f7a4d872SJ. Bruce Fields if (s) { 6016136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 602f7a4d872SJ. Bruce Fields free_generic_stateid(s); 603f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 604f7a4d872SJ. Bruce Fields } 605f7a4d872SJ. Bruce Fields } 606f7a4d872SJ. Bruce Fields 607fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 608f1d110caSJ. Bruce Fields { 609fe0750e5SJ. Bruce Fields unhash_openowner(oo); 610fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 611f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 612fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 613f1d110caSJ. Bruce Fields } 614f1d110caSJ. Bruce Fields 6155282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6165282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6175282fd72SMarc Eshel 6185282fd72SMarc Eshel static inline int 6195282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6205282fd72SMarc Eshel { 6215282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6225282fd72SMarc Eshel 6235282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6245282fd72SMarc Eshel } 6255282fd72SMarc Eshel 6268f199b82STrond Myklebust #ifdef NFSD_DEBUG 6275282fd72SMarc Eshel static inline void 6285282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6295282fd72SMarc Eshel { 6305282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6315282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6325282fd72SMarc Eshel } 6338f199b82STrond Myklebust #else 6348f199b82STrond Myklebust static inline void 6358f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6368f199b82STrond Myklebust { 6378f199b82STrond Myklebust } 6388f199b82STrond Myklebust #endif 6398f199b82STrond Myklebust 6405282fd72SMarc Eshel 641ec6b5d7bSAndy Adamson static void 642ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 643ec6b5d7bSAndy Adamson { 644ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 645ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 646ec6b5d7bSAndy Adamson 647ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 648ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 649ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 650ec6b5d7bSAndy Adamson sid->reserved = 0; 651ec6b5d7bSAndy Adamson } 652ec6b5d7bSAndy Adamson 653ec6b5d7bSAndy Adamson /* 654a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 655a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 656a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 657a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 658a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 659a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 660a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 661a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 662a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 663a649637cSAndy Adamson * for the SEQUENCE op response: 664ec6b5d7bSAndy Adamson */ 665a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 666a649637cSAndy Adamson 667557ce264SAndy Adamson static void 668557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 669557ce264SAndy Adamson { 670557ce264SAndy Adamson int i; 671557ce264SAndy Adamson 672557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 673557ce264SAndy Adamson kfree(ses->se_slots[i]); 674557ce264SAndy Adamson } 675557ce264SAndy Adamson 676efe0cb6dSJ. Bruce Fields /* 677efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 678efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 679efe0cb6dSJ. Bruce Fields */ 680efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 681efe0cb6dSJ. Bruce Fields { 682efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 683efe0cb6dSJ. Bruce Fields } 684efe0cb6dSJ. Bruce Fields 6855b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 686ec6b5d7bSAndy Adamson { 6875b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 6885b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 689ec6b5d7bSAndy Adamson 6905b6feee9SJ. Bruce Fields return size; 691557ce264SAndy Adamson } 692557ce264SAndy Adamson 6935b6feee9SJ. Bruce Fields /* 6945b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 6955b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 69642b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 6975b6feee9SJ. Bruce Fields */ 6985b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 6995b6feee9SJ. Bruce Fields { 7005b6feee9SJ. Bruce Fields int avail; 7015b6feee9SJ. Bruce Fields 7025b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7035b6feee9SJ. Bruce Fields 7045b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7055b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7065b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7075b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7085b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7095b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7105b6feee9SJ. Bruce Fields 7115b6feee9SJ. Bruce Fields return num; 7125b6feee9SJ. Bruce Fields } 7135b6feee9SJ. Bruce Fields 7145b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7155b6feee9SJ. Bruce Fields { 7165b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7175b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7185b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7195b6feee9SJ. Bruce Fields } 7205b6feee9SJ. Bruce Fields 7215b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7225b6feee9SJ. Bruce Fields { 7235b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7245b6feee9SJ. Bruce Fields int mem, i; 725ec6b5d7bSAndy Adamson 726c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 727ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7285b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 729ec6b5d7bSAndy Adamson 7305b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7316c18ba9fSAlexandros Batsakis if (!new) 7325b6feee9SJ. Bruce Fields return NULL; 733ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7345b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7355b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7365b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7375b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 738ec6b5d7bSAndy Adamson goto out_free; 739ec6b5d7bSAndy Adamson } 7405b6feee9SJ. Bruce Fields return new; 7415b6feee9SJ. Bruce Fields out_free: 7425b6feee9SJ. Bruce Fields while (i--) 7435b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7445b6feee9SJ. Bruce Fields kfree(new); 7455b6feee9SJ. Bruce Fields return NULL; 7465b6feee9SJ. Bruce Fields } 7475b6feee9SJ. Bruce Fields 7485b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7495b6feee9SJ. Bruce Fields { 7505b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7515b6feee9SJ. Bruce Fields 7525b6feee9SJ. Bruce Fields new->maxreqs = numslots; 753d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 754d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7555b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7565b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7575b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7585b6feee9SJ. Bruce Fields } 7595b6feee9SJ. Bruce Fields 76019cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 76119cf5c02SJ. Bruce Fields { 76219cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 76319cf5c02SJ. Bruce Fields kfree(c); 76419cf5c02SJ. Bruce Fields } 76519cf5c02SJ. Bruce Fields 76619cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 76719cf5c02SJ. Bruce Fields { 76819cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 76919cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 77019cf5c02SJ. Bruce Fields 77119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 77219cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 77319cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 77419cf5c02SJ. Bruce Fields free_conn(c); 77519cf5c02SJ. Bruce Fields } 77619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 777eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 77819cf5c02SJ. Bruce Fields } 77919cf5c02SJ. Bruce Fields 780d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 781c7662518SJ. Bruce Fields { 782c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 783c7662518SJ. Bruce Fields 784c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 785c7662518SJ. Bruce Fields if (!conn) 786db90681dSJ. Bruce Fields return NULL; 787c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 788c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 789d29c374cSJ. Bruce Fields conn->cn_flags = flags; 790db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 791db90681dSJ. Bruce Fields return conn; 792db90681dSJ. Bruce Fields } 793db90681dSJ. Bruce Fields 794328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 795328ead28SJ. Bruce Fields { 796328ead28SJ. Bruce Fields conn->cn_session = ses; 797328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 798328ead28SJ. Bruce Fields } 799328ead28SJ. Bruce Fields 800db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 801db90681dSJ. Bruce Fields { 802db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 803c7662518SJ. Bruce Fields 804c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 805328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 806c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 807db90681dSJ. Bruce Fields } 808c7662518SJ. Bruce Fields 80921b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 810db90681dSJ. Bruce Fields { 81119cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 81221b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 813db90681dSJ. Bruce Fields } 814db90681dSJ. Bruce Fields 8151d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 816db90681dSJ. Bruce Fields { 817db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 81821b75b01SJ. Bruce Fields int ret; 819db90681dSJ. Bruce Fields 8201d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 821db90681dSJ. Bruce Fields if (!conn) 822db90681dSJ. Bruce Fields return nfserr_jukebox; 823db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 82421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 82521b75b01SJ. Bruce Fields if (ret) 82621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 82721b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 828c7662518SJ. Bruce Fields return nfs_ok; 829c7662518SJ. Bruce Fields } 830c7662518SJ. Bruce Fields 8311d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8321d1bc8f2SJ. Bruce Fields { 8331d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8341d1bc8f2SJ. Bruce Fields 8351d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8361d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8371d1bc8f2SJ. Bruce Fields 8381d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8391d1bc8f2SJ. Bruce Fields } 8401d1bc8f2SJ. Bruce Fields 8411d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 84219cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 843c7662518SJ. Bruce Fields { 84419cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 84519cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 84619cf5c02SJ. Bruce Fields 84719cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 84819cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 84919cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 85019cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 85119cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 85219cf5c02SJ. Bruce Fields 85319cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 85419cf5c02SJ. Bruce Fields free_conn(c); 85519cf5c02SJ. Bruce Fields 85619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 85719cf5c02SJ. Bruce Fields } 85819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 859c7662518SJ. Bruce Fields } 860c7662518SJ. Bruce Fields 861508dc6e1SBenny Halevy static void free_session(struct kref *kref) 862c7662518SJ. Bruce Fields { 863c7662518SJ. Bruce Fields struct nfsd4_session *ses; 864c7662518SJ. Bruce Fields int mem; 865c7662518SJ. Bruce Fields 866508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 867c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 86819cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 869c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 870c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 871c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 872c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 873c7662518SJ. Bruce Fields free_session_slots(ses); 874c7662518SJ. Bruce Fields kfree(ses); 875c7662518SJ. Bruce Fields } 876c7662518SJ. Bruce Fields 877508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 878508dc6e1SBenny Halevy { 879508dc6e1SBenny Halevy spin_lock(&client_lock); 880508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 881508dc6e1SBenny Halevy spin_unlock(&client_lock); 882508dc6e1SBenny Halevy } 883508dc6e1SBenny Halevy 884ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 8855b6feee9SJ. Bruce Fields { 8865b6feee9SJ. Bruce Fields struct nfsd4_session *new; 8875b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 8885b6feee9SJ. Bruce Fields int numslots, slotsize; 88957b7b43bSJ. Bruce Fields __be32 status; 8905b6feee9SJ. Bruce Fields int idx; 8915b6feee9SJ. Bruce Fields 8925b6feee9SJ. Bruce Fields /* 8935b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 8945b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 8955b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 8965b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 8975b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 8985b6feee9SJ. Bruce Fields */ 8995b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9005b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 901ced6dfe9SMi Jinlong if (numslots < 1) 902ced6dfe9SMi Jinlong return NULL; 9035b6feee9SJ. Bruce Fields 9045b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9055b6feee9SJ. Bruce Fields if (!new) { 9065b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 907ac7c46f2SJ. Bruce Fields return NULL; 9085b6feee9SJ. Bruce Fields } 9095b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 910ec6b5d7bSAndy Adamson 911ec6b5d7bSAndy Adamson new->se_client = clp; 912ec6b5d7bSAndy Adamson gen_sessionid(new); 913ec6b5d7bSAndy Adamson 914c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 915c7662518SJ. Bruce Fields 916ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 917ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9188b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 919ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9205b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9219089f1b4SBenny Halevy spin_lock(&client_lock); 922ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9234c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 924ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9254c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9269089f1b4SBenny Halevy spin_unlock(&client_lock); 927ec6b5d7bSAndy Adamson 9281d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 929ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 930c7662518SJ. Bruce Fields if (status) { 931508dc6e1SBenny Halevy spin_lock(&client_lock); 932c7662518SJ. Bruce Fields free_session(&new->se_ref); 933508dc6e1SBenny Halevy spin_unlock(&client_lock); 934ac7c46f2SJ. Bruce Fields return NULL; 935c7662518SJ. Bruce Fields } 936dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 937edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 938dcbeaa68SJ. Bruce Fields /* 939dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 940dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 941dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 942dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 943dcbeaa68SJ. Bruce Fields * future: 944dcbeaa68SJ. Bruce Fields */ 945edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 946edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 947edd76786SJ. Bruce Fields } 948dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 949ac7c46f2SJ. Bruce Fields return new; 950ec6b5d7bSAndy Adamson } 951ec6b5d7bSAndy Adamson 9529089f1b4SBenny Halevy /* caller must hold client_lock */ 9535282fd72SMarc Eshel static struct nfsd4_session * 9545282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9555282fd72SMarc Eshel { 9565282fd72SMarc Eshel struct nfsd4_session *elem; 9575282fd72SMarc Eshel int idx; 9585282fd72SMarc Eshel 9595282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9605282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9615282fd72SMarc Eshel /* Search in the appropriate list */ 9625282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9635282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9645282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9655282fd72SMarc Eshel return elem; 9665282fd72SMarc Eshel } 9675282fd72SMarc Eshel } 9685282fd72SMarc Eshel 9695282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9705282fd72SMarc Eshel return NULL; 9715282fd72SMarc Eshel } 9725282fd72SMarc Eshel 9739089f1b4SBenny Halevy /* caller must hold client_lock */ 9747116ed6bSAndy Adamson static void 9755282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9767116ed6bSAndy Adamson { 9777116ed6bSAndy Adamson list_del(&ses->se_hash); 9784c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9797116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9804c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9815282fd72SMarc Eshel } 9825282fd72SMarc Eshel 98336acb66bSBenny Halevy /* must be called under the client_lock */ 9841da177e4SLinus Torvalds static inline void 98536acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9861da177e4SLinus Torvalds { 98707cd4909SBenny Halevy if (is_client_expired(clp)) { 98807cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 98907cd4909SBenny Halevy __func__, 99007cd4909SBenny Halevy clp->cl_clientid.cl_boot, 99107cd4909SBenny Halevy clp->cl_clientid.cl_id); 99207cd4909SBenny Halevy return; 99307cd4909SBenny Halevy } 99407cd4909SBenny Halevy 9951da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 9961da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 9971da177e4SLinus Torvalds clp->cl_clientid.cl_id); 9981da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 9991da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds 100236acb66bSBenny Halevy static inline void 100336acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 100436acb66bSBenny Halevy { 100536acb66bSBenny Halevy spin_lock(&client_lock); 100636acb66bSBenny Halevy renew_client_locked(clp); 100736acb66bSBenny Halevy spin_unlock(&client_lock); 100836acb66bSBenny Halevy } 100936acb66bSBenny Halevy 10101da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10111da177e4SLinus Torvalds static int 10121da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10131da177e4SLinus Torvalds { 10141da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10151da177e4SLinus Torvalds return 0; 101660adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 101760adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10181da177e4SLinus Torvalds return 1; 10191da177e4SLinus Torvalds } 10201da177e4SLinus Torvalds 10211da177e4SLinus Torvalds /* 10221da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10231da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10241da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10251da177e4SLinus Torvalds */ 102635bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10271da177e4SLinus Torvalds { 10281da177e4SLinus Torvalds struct nfs4_client *clp; 10291da177e4SLinus Torvalds 103035bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 103135bba9a3SJ. Bruce Fields if (clp == NULL) 103235bba9a3SJ. Bruce Fields return NULL; 103367114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 103435bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 103535bba9a3SJ. Bruce Fields kfree(clp); 103635bba9a3SJ. Bruce Fields return NULL; 103735bba9a3SJ. Bruce Fields } 10381da177e4SLinus Torvalds clp->cl_name.len = name.len; 10391da177e4SLinus Torvalds return clp; 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds static inline void 10431da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10441da177e4SLinus Torvalds { 1045508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 1046792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1047792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1048792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1049792c95ddSJ. Bruce Fields se_perclnt); 1050792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1051508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1052792c95ddSJ. Bruce Fields } 10531da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 10541da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 105568e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 10561da177e4SLinus Torvalds kfree(clp->cl_name.data); 10571da177e4SLinus Torvalds kfree(clp); 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 1060d7682988SBenny Halevy void 1061d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1062d7682988SBenny Halevy { 1063d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1064d7682988SBenny Halevy 1065d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1066d7682988SBenny Halevy return; 1067d7682988SBenny Halevy if (is_client_expired(clp)) { 1068d7682988SBenny Halevy free_client(clp); 1069d7682988SBenny Halevy session->se_client = NULL; 1070d7682988SBenny Halevy } else 1071d7682988SBenny Halevy renew_client_locked(clp); 1072d7682988SBenny Halevy spin_unlock(&client_lock); 1073d7682988SBenny Halevy } 1074d7682988SBenny Halevy 107584d38ac9SBenny Halevy /* must be called under the client_lock */ 107684d38ac9SBenny Halevy static inline void 107784d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 107884d38ac9SBenny Halevy { 1079792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1080792c95ddSJ. Bruce Fields 108107cd4909SBenny Halevy mark_client_expired(clp); 108284d38ac9SBenny Halevy list_del(&clp->cl_lru); 10834c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1084792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1085792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10864c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 108784d38ac9SBenny Halevy } 108884d38ac9SBenny Halevy 10891da177e4SLinus Torvalds static void 10901da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 10911da177e4SLinus Torvalds { 1092fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 10931da177e4SLinus Torvalds struct nfs4_delegation *dp; 10941da177e4SLinus Torvalds struct list_head reaplist; 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 10971da177e4SLinus Torvalds spin_lock(&recall_lock); 1098ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1099ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1100ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11011da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds spin_unlock(&recall_lock); 11041da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11051da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11061da177e4SLinus Torvalds unhash_delegation(dp); 11071da177e4SLinus Torvalds } 1108ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1109fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1110fe0750e5SJ. Bruce Fields release_openowner(oo); 11111da177e4SLinus Torvalds } 11126ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11132bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11142bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 111584d38ac9SBenny Halevy list_del(&clp->cl_idhash); 111684d38ac9SBenny Halevy list_del(&clp->cl_strhash); 111784d38ac9SBenny Halevy spin_lock(&client_lock); 111884d38ac9SBenny Halevy unhash_client_locked(clp); 111946583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1120b12a05cbSJ. Bruce Fields free_client(clp); 112146583e25SBenny Halevy spin_unlock(&client_lock); 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 112435bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 112535bba9a3SJ. Bruce Fields { 112635bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 112735bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 113035bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 113135bba9a3SJ. Bruce Fields { 11321da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11331da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11341da177e4SLinus Torvalds } 11351da177e4SLinus Torvalds 113635bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 113735bba9a3SJ. Bruce Fields { 11381da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11391da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11401da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11411da177e4SLinus Torvalds get_group_info(target->cr_group_info); 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 114435bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1145599e0a22SJ. Bruce Fields { 1146a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11471da177e4SLinus Torvalds } 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds static int 1150599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1151599e0a22SJ. Bruce Fields { 1152599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds 11551da177e4SLinus Torvalds static int 1156599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1157599e0a22SJ. Bruce Fields { 1158599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds /* XXX what about NGROUP */ 11621da177e4SLinus Torvalds static int 1163599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1164599e0a22SJ. Bruce Fields { 1165599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds 11685ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 11695ec7b46cSJ. Bruce Fields { 11705ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 11715ec7b46cSJ. Bruce Fields 11721da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 11731da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 11741da177e4SLinus Torvalds } 11751da177e4SLinus Torvalds 1176deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1177deda2faaSJ. Bruce Fields { 1178ab4684d1SChuck Lever __be32 verf[2]; 1179deda2faaSJ. Bruce Fields static u32 i; 11801da177e4SLinus Torvalds 1181ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1182ab4684d1SChuck Lever verf[1] = (__be32)i++; 1183ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 118638c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 11874581d140SJ. Bruce Fields { 118838c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 11894581d140SJ. Bruce Fields } 11904d71ab87SJ. Bruce Fields 119138c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1192f459e453SJ. Bruce Fields { 1193f459e453SJ. Bruce Fields struct nfs4_stid *s; 1194f459e453SJ. Bruce Fields 119538c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1196f459e453SJ. Bruce Fields if (!s) 1197f459e453SJ. Bruce Fields return NULL; 1198f459e453SJ. Bruce Fields if (typemask & s->sc_type) 11994d71ab87SJ. Bruce Fields return s; 12004581d140SJ. Bruce Fields return NULL; 12014581d140SJ. Bruce Fields } 12024581d140SJ. Bruce Fields 1203b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1204b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1205b09333c4SRicardo Labiaga { 1206b09333c4SRicardo Labiaga struct nfs4_client *clp; 1207b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1208b09333c4SRicardo Labiaga char *princ; 1209b09333c4SRicardo Labiaga 1210b09333c4SRicardo Labiaga clp = alloc_client(name); 1211b09333c4SRicardo Labiaga if (clp == NULL) 1212b09333c4SRicardo Labiaga return NULL; 1213b09333c4SRicardo Labiaga 1214792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1215792c95ddSJ. Bruce Fields 1216b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1217b09333c4SRicardo Labiaga if (princ) { 1218b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1219b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1220508dc6e1SBenny Halevy spin_lock(&client_lock); 1221b09333c4SRicardo Labiaga free_client(clp); 1222508dc6e1SBenny Halevy spin_unlock(&client_lock); 1223b09333c4SRicardo Labiaga return NULL; 1224b09333c4SRicardo Labiaga } 1225b09333c4SRicardo Labiaga } 1226b09333c4SRicardo Labiaga 122738c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1228b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 122946583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 123077a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1231b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1232b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1233b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1234b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1235b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12365ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12376ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1238cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 123907cd4909SBenny Halevy clp->cl_time = get_seconds(); 1240b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1241b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1242b09333c4SRicardo Labiaga copy_verf(clp, verf); 1243b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1244b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1245b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1246b09333c4SRicardo Labiaga gen_confirm(clp); 1247edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1248b09333c4SRicardo Labiaga return clp; 1249b09333c4SRicardo Labiaga } 1250b09333c4SRicardo Labiaga 1251fd39ca9aSNeilBrown static void 12521da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 12531da177e4SLinus Torvalds { 12541da177e4SLinus Torvalds unsigned int idhashval; 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 12571da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12581da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 125936acb66bSBenny Halevy renew_client(clp); 12601da177e4SLinus Torvalds } 12611da177e4SLinus Torvalds 1262fd39ca9aSNeilBrown static void 12631da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 12641da177e4SLinus Torvalds { 12651da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12661da177e4SLinus Torvalds unsigned int strhashval; 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1269f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1270a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1271328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 12721da177e4SLinus Torvalds renew_client(clp); 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds 12751da177e4SLinus Torvalds static struct nfs4_client * 12761da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 12771da177e4SLinus Torvalds { 12781da177e4SLinus Torvalds struct nfs4_client *clp; 12791da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1282a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1283a50d2ad1SJ. Bruce Fields renew_client(clp); 12841da177e4SLinus Torvalds return clp; 12851da177e4SLinus Torvalds } 1286a50d2ad1SJ. Bruce Fields } 12871da177e4SLinus Torvalds return NULL; 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds static struct nfs4_client * 12911da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 12921da177e4SLinus Torvalds { 12931da177e4SLinus Torvalds struct nfs4_client *clp; 12941da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12951da177e4SLinus Torvalds 12961da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1297599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 12981da177e4SLinus Torvalds return clp; 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds return NULL; 13011da177e4SLinus Torvalds } 13021da177e4SLinus Torvalds 13036e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1304a1bcecd2SAndy Adamson { 13056e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1306a1bcecd2SAndy Adamson } 1307a1bcecd2SAndy Adamson 130828ce6054SNeilBrown static struct nfs4_client * 1309e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 131028ce6054SNeilBrown { 131128ce6054SNeilBrown struct nfs4_client *clp; 131228ce6054SNeilBrown 131328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1314e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 131528ce6054SNeilBrown return clp; 131628ce6054SNeilBrown } 131728ce6054SNeilBrown return NULL; 131828ce6054SNeilBrown } 131928ce6054SNeilBrown 132028ce6054SNeilBrown static struct nfs4_client * 1321e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 132228ce6054SNeilBrown { 132328ce6054SNeilBrown struct nfs4_client *clp; 132428ce6054SNeilBrown 132528ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1326e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 132728ce6054SNeilBrown return clp; 132828ce6054SNeilBrown } 132928ce6054SNeilBrown return NULL; 133028ce6054SNeilBrown } 133128ce6054SNeilBrown 1332fd39ca9aSNeilBrown static void 13336f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13341da177e4SLinus Torvalds { 133507263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13366f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13376f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13387077ecbaSJeff Layton unsigned short expected_family; 13391da177e4SLinus Torvalds 13407077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13417077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13427077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 13437077ecbaSJeff Layton expected_family = AF_INET; 13447077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 13457077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 13467077ecbaSJeff Layton expected_family = AF_INET6; 13477077ecbaSJeff Layton else 13481da177e4SLinus Torvalds goto out_err; 13491da177e4SLinus Torvalds 1350f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1351aa9a4ec7SJeff Layton se->se_callback_addr_len, 135207263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 135307263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1354aa9a4ec7SJeff Layton 135507263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 13561da177e4SLinus Torvalds goto out_err; 1357aa9a4ec7SJeff Layton 135807263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 135907263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1360fbf4665fSJeff Layton 136107263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 136207263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1363849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 13641da177e4SLinus Torvalds return; 13651da177e4SLinus Torvalds out_err: 136607263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 136707263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1368849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 13691da177e4SLinus Torvalds "will not receive delegations\n", 13701da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13711da177e4SLinus Torvalds 13721da177e4SLinus Torvalds return; 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds 1375074fe897SAndy Adamson /* 1376557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1377074fe897SAndy Adamson */ 1378074fe897SAndy Adamson void 1379074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1380074fe897SAndy Adamson { 1381557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1382557ce264SAndy Adamson unsigned int base; 1383074fe897SAndy Adamson 1384557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1385074fe897SAndy Adamson 1386557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1387557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1388bf864a31SAndy Adamson 1389bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1390bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1391557ce264SAndy Adamson slot->sl_datalen = 0; 1392bf864a31SAndy Adamson return; 1393bf864a31SAndy Adamson } 1394557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1395557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1396557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1397557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1398557ce264SAndy Adamson slot->sl_datalen)) 1399557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1400557ce264SAndy Adamson return; 1401074fe897SAndy Adamson } 1402074fe897SAndy Adamson 1403074fe897SAndy Adamson /* 1404abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1405abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1406abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1407abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1408abfabf8cSAndy Adamson * 1409074fe897SAndy Adamson */ 1410abfabf8cSAndy Adamson static __be32 1411abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1412abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1413074fe897SAndy Adamson { 1414abfabf8cSAndy Adamson struct nfsd4_op *op; 1415abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1416074fe897SAndy Adamson 1417abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1418abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1419abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1420abfabf8cSAndy Adamson 1421abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 142273e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1423abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1424abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1425abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1426074fe897SAndy Adamson } 1427abfabf8cSAndy Adamson return op->status; 1428074fe897SAndy Adamson } 1429074fe897SAndy Adamson 1430074fe897SAndy Adamson /* 1431557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1432557ce264SAndy Adamson * session values. 1433074fe897SAndy Adamson */ 1434074fe897SAndy Adamson __be32 1435bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1436bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1437074fe897SAndy Adamson { 1438557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1439074fe897SAndy Adamson __be32 status; 1440074fe897SAndy Adamson 1441557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1442074fe897SAndy Adamson 1443abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1444abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1445abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1446abfabf8cSAndy Adamson return status; 1447074fe897SAndy Adamson 1448557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1449557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1450074fe897SAndy Adamson 1451557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1452557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1453557ce264SAndy Adamson status = slot->sl_status; 1454074fe897SAndy Adamson 1455074fe897SAndy Adamson return status; 1456074fe897SAndy Adamson } 1457074fe897SAndy Adamson 14580733d213SAndy Adamson /* 14590733d213SAndy Adamson * Set the exchange_id flags returned by the server. 14600733d213SAndy Adamson */ 14610733d213SAndy Adamson static void 14620733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 14630733d213SAndy Adamson { 14640733d213SAndy Adamson /* pNFS is not supported */ 14650733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 14660733d213SAndy Adamson 14670733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 14680733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 14690733d213SAndy Adamson 14700733d213SAndy Adamson /* set the wire flags to return to client. */ 14710733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 14720733d213SAndy Adamson } 14730733d213SAndy Adamson 1474b37ad28bSAl Viro __be32 1475069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1476069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1477069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1478069b6ad4SAndy Adamson { 14790733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 148057b7b43bSJ. Bruce Fields __be32 status; 14810733d213SAndy Adamson unsigned int strhashval; 14820733d213SAndy Adamson char dname[HEXDIR_LEN]; 1483363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 14840733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1485363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14860733d213SAndy Adamson 1487363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 14880733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1489363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 14900733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1491363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 14920733d213SAndy Adamson 1493a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 14940733d213SAndy Adamson return nfserr_inval; 14950733d213SAndy Adamson 14960733d213SAndy Adamson /* Currently only support SP4_NONE */ 14970733d213SAndy Adamson switch (exid->spa_how) { 14980733d213SAndy Adamson case SP4_NONE: 14990733d213SAndy Adamson break; 15000733d213SAndy Adamson case SP4_SSV: 1501044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15020733d213SAndy Adamson default: 15030733d213SAndy Adamson BUG(); /* checked by xdr code */ 15040733d213SAndy Adamson case SP4_MACH_CRED: 15050733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15060733d213SAndy Adamson } 15070733d213SAndy Adamson 15080733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15090733d213SAndy Adamson 15100733d213SAndy Adamson if (status) 15110733d213SAndy Adamson goto error; 15120733d213SAndy Adamson 15130733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15140733d213SAndy Adamson 15150733d213SAndy Adamson nfs4_lock_state(); 15160733d213SAndy Adamson status = nfs_ok; 15170733d213SAndy Adamson 1518e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15190733d213SAndy Adamson if (conf) { 1520e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1521e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1522e203d506SJ. Bruce Fields goto out; 1523e203d506SJ. Bruce Fields } 15240733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 15250733d213SAndy Adamson /* 18.35.4 case 8 */ 15260733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15270733d213SAndy Adamson status = nfserr_not_same; 15280733d213SAndy Adamson goto out; 15290733d213SAndy Adamson } 15300733d213SAndy Adamson /* Client reboot: destroy old state */ 15310733d213SAndy Adamson expire_client(conf); 15320733d213SAndy Adamson goto out_new; 15330733d213SAndy Adamson } 15340733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 15350733d213SAndy Adamson /* 18.35.4 case 9 */ 15360733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15370733d213SAndy Adamson status = nfserr_perm; 15380733d213SAndy Adamson goto out; 15390733d213SAndy Adamson } 15400733d213SAndy Adamson expire_client(conf); 15410733d213SAndy Adamson goto out_new; 15420733d213SAndy Adamson } 15430733d213SAndy Adamson /* 15440733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 15450733d213SAndy Adamson * confirmed client id (18.35.3). 15460733d213SAndy Adamson */ 15470733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 15480733d213SAndy Adamson 15490733d213SAndy Adamson /* 15500733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 15510733d213SAndy Adamson * Leave confirmed record intact and return same result. 15520733d213SAndy Adamson */ 15530733d213SAndy Adamson copy_verf(conf, &verf); 15540733d213SAndy Adamson new = conf; 15550733d213SAndy Adamson goto out_copy; 15566ddbbbfeSMike Sager } 15576ddbbbfeSMike Sager 15580733d213SAndy Adamson /* 18.35.4 case 7 */ 15590733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15600733d213SAndy Adamson status = nfserr_noent; 15610733d213SAndy Adamson goto out; 15620733d213SAndy Adamson } 15630733d213SAndy Adamson 1564e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 15650733d213SAndy Adamson if (unconf) { 15660733d213SAndy Adamson /* 15670733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 15680733d213SAndy Adamson * a new unconfirmed record should be generated regardless 15690733d213SAndy Adamson * of whether any properties have changed. 15700733d213SAndy Adamson */ 15710733d213SAndy Adamson expire_client(unconf); 15720733d213SAndy Adamson } 15730733d213SAndy Adamson 15740733d213SAndy Adamson out_new: 15750733d213SAndy Adamson /* Normal case */ 1576b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 15770733d213SAndy Adamson if (new == NULL) { 15784731030dSJ. Bruce Fields status = nfserr_jukebox; 15790733d213SAndy Adamson goto out; 15800733d213SAndy Adamson } 15810733d213SAndy Adamson 15820733d213SAndy Adamson gen_clid(new); 15830733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 15840733d213SAndy Adamson out_copy: 15850733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 15860733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 15870733d213SAndy Adamson 158838eb76a5SAndy Adamson exid->seqid = 1; 15890733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 15900733d213SAndy Adamson 15910733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 159249557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 15930733d213SAndy Adamson status = nfs_ok; 15940733d213SAndy Adamson 15950733d213SAndy Adamson out: 15960733d213SAndy Adamson nfs4_unlock_state(); 15970733d213SAndy Adamson error: 15980733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 15990733d213SAndy Adamson return status; 1600069b6ad4SAndy Adamson } 1601069b6ad4SAndy Adamson 160257b7b43bSJ. Bruce Fields static __be32 160388e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1604b85d4c01SBenny Halevy { 160588e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 160688e588d5SAndy Adamson slot_seqid); 1607b85d4c01SBenny Halevy 1608b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 160988e588d5SAndy Adamson if (slot_inuse) { 161088e588d5SAndy Adamson if (seqid == slot_seqid) 1611b85d4c01SBenny Halevy return nfserr_jukebox; 1612b85d4c01SBenny Halevy else 1613b85d4c01SBenny Halevy return nfserr_seq_misordered; 1614b85d4c01SBenny Halevy } 1615f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 161688e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1617b85d4c01SBenny Halevy return nfs_ok; 161888e588d5SAndy Adamson if (seqid == slot_seqid) 1619b85d4c01SBenny Halevy return nfserr_replay_cache; 1620b85d4c01SBenny Halevy return nfserr_seq_misordered; 1621b85d4c01SBenny Halevy } 1622b85d4c01SBenny Halevy 162349557cc7SAndy Adamson /* 162449557cc7SAndy Adamson * Cache the create session result into the create session single DRC 162549557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 162649557cc7SAndy Adamson * Do this for solo or embedded create session operations. 162749557cc7SAndy Adamson */ 162849557cc7SAndy Adamson static void 162949557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 163057b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 163149557cc7SAndy Adamson { 163249557cc7SAndy Adamson slot->sl_status = nfserr; 163349557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 163449557cc7SAndy Adamson } 163549557cc7SAndy Adamson 163649557cc7SAndy Adamson static __be32 163749557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 163849557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 163949557cc7SAndy Adamson { 164049557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 164149557cc7SAndy Adamson return slot->sl_status; 164249557cc7SAndy Adamson } 164349557cc7SAndy Adamson 16441b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 16451b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 16461b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16471b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 16481b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16491b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 16501b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 16511b74c25bSMi Jinlong 16521b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 16531b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 16541b74c25bSMi Jinlong 1 + /* status */ \ 16551b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16561b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 16571b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16581b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 16591b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 16601b74c25bSMi Jinlong 166157b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 16621b74c25bSMi Jinlong { 16631b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 16641b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 16651b74c25bSMi Jinlong } 16661b74c25bSMi Jinlong 1667069b6ad4SAndy Adamson __be32 1668069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1669069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1670069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1671069b6ad4SAndy Adamson { 1672363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1673ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1674ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 167549557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 167686c3e16cSJ. Bruce Fields bool confirm_me = false; 167757b7b43bSJ. Bruce Fields __be32 status = 0; 1678ec6b5d7bSAndy Adamson 1679a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1680a62573dcSMi Jinlong return nfserr_inval; 1681a62573dcSMi Jinlong 1682ec6b5d7bSAndy Adamson nfs4_lock_state(); 1683ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1684ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1685ec6b5d7bSAndy Adamson 1686ec6b5d7bSAndy Adamson if (conf) { 168749557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 168849557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 168938eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1690ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 169149557cc7SAndy Adamson cs_slot->sl_seqid); 169238eb76a5SAndy Adamson /* Return the cached reply status */ 169349557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 169438eb76a5SAndy Adamson goto out; 169549557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1696ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1697ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1698ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 169949557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1700ec6b5d7bSAndy Adamson goto out; 1701ec6b5d7bSAndy Adamson } 1702ec6b5d7bSAndy Adamson } else if (unconf) { 1703ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1704363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1705ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1706ec6b5d7bSAndy Adamson goto out; 1707ec6b5d7bSAndy Adamson } 1708ec6b5d7bSAndy Adamson 170949557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 171049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 171138eb76a5SAndy Adamson if (status) { 171238eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1713ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1714cd5b8144SJ. Bruce Fields goto out; 1715ec6b5d7bSAndy Adamson } 1716ec6b5d7bSAndy Adamson 171786c3e16cSJ. Bruce Fields confirm_me = true; 1718ec6b5d7bSAndy Adamson conf = unconf; 1719ec6b5d7bSAndy Adamson } else { 1720ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1721ec6b5d7bSAndy Adamson goto out; 1722ec6b5d7bSAndy Adamson } 1723ec6b5d7bSAndy Adamson 1724408b79bcSJ. Bruce Fields /* 17258323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17268323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17278323c3b2SJ. Bruce Fields */ 17288323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17298323c3b2SJ. Bruce Fields /* 1730408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1731408b79bcSJ. Bruce Fields */ 1732408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1733408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1734408b79bcSJ. Bruce Fields 17351b74c25bSMi Jinlong status = nfserr_toosmall; 17361b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17371b74c25bSMi Jinlong goto out; 17381b74c25bSMi Jinlong 1739ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1740ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1741ac7c46f2SJ. Bruce Fields if (!new) 1742ec6b5d7bSAndy Adamson goto out; 1743ac7c46f2SJ. Bruce Fields status = nfs_ok; 1744ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1745ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 174612050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 174712050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 174886c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 174949557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1750ec6b5d7bSAndy Adamson 175149557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 175249557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 175386c3e16cSJ. Bruce Fields if (confirm_me) 175486c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1755ec6b5d7bSAndy Adamson out: 1756ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1757ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1758ec6b5d7bSAndy Adamson return status; 1759069b6ad4SAndy Adamson } 1760069b6ad4SAndy Adamson 176157716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 176257716355SJ. Bruce Fields { 176357716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 176457716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 176557716355SJ. Bruce Fields 176657716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 176757716355SJ. Bruce Fields } 176857716355SJ. Bruce Fields 17691d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 17701d1bc8f2SJ. Bruce Fields { 17711d1bc8f2SJ. Bruce Fields switch (*dir) { 17721d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 17731d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 17741d1bc8f2SJ. Bruce Fields return nfs_ok; 17751d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 17761d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 17771d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 17781d1bc8f2SJ. Bruce Fields return nfs_ok; 17791d1bc8f2SJ. Bruce Fields }; 17801d1bc8f2SJ. Bruce Fields return nfserr_inval; 17811d1bc8f2SJ. Bruce Fields } 17821d1bc8f2SJ. Bruce Fields 17831d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 17841d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 17851d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 17861d1bc8f2SJ. Bruce Fields { 17871d1bc8f2SJ. Bruce Fields __be32 status; 17881d1bc8f2SJ. Bruce Fields 17891d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 17901d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 17911d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 17921d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 17931d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 17941d1bc8f2SJ. Bruce Fields * client_lock iself: */ 17951d1bc8f2SJ. Bruce Fields if (cstate->session) { 17961d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 17971d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 17981d1bc8f2SJ. Bruce Fields } 17991d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18001d1bc8f2SJ. Bruce Fields if (!cstate->session) 18011d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18021d1bc8f2SJ. Bruce Fields 18031d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18041db2b9ddSBryan Schumaker if (!status) 18051d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18061db2b9ddSBryan Schumaker return status; 18071d1bc8f2SJ. Bruce Fields } 18081d1bc8f2SJ. Bruce Fields 18095d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18105d4cec2fSJ. Bruce Fields { 18115d4cec2fSJ. Bruce Fields if (!session) 18125d4cec2fSJ. Bruce Fields return 0; 18135d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18145d4cec2fSJ. Bruce Fields } 18155d4cec2fSJ. Bruce Fields 1816069b6ad4SAndy Adamson __be32 1817069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1818069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1819069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1820069b6ad4SAndy Adamson { 1821e10e0cfcSBenny Halevy struct nfsd4_session *ses; 182257b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1823e10e0cfcSBenny Halevy 1824e10e0cfcSBenny Halevy /* Notes: 1825e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1826e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1827e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1828e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1829e10e0cfcSBenny Halevy */ 1830e10e0cfcSBenny Halevy 18315d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 183257716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 183357716355SJ. Bruce Fields return nfserr_not_only_op; 183457716355SJ. Bruce Fields } 1835e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18369089f1b4SBenny Halevy spin_lock(&client_lock); 1837e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1838e10e0cfcSBenny Halevy if (!ses) { 18399089f1b4SBenny Halevy spin_unlock(&client_lock); 1840e10e0cfcSBenny Halevy goto out; 1841e10e0cfcSBenny Halevy } 1842e10e0cfcSBenny Halevy 1843e10e0cfcSBenny Halevy unhash_session(ses); 18449089f1b4SBenny Halevy spin_unlock(&client_lock); 1845e10e0cfcSBenny Halevy 1846ab707e15SBenny Halevy nfs4_lock_state(); 184784f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1848ab707e15SBenny Halevy nfs4_unlock_state(); 184919cf5c02SJ. Bruce Fields 1850508dc6e1SBenny Halevy spin_lock(&client_lock); 185119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1852508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1853508dc6e1SBenny Halevy spin_unlock(&client_lock); 1854e10e0cfcSBenny Halevy status = nfs_ok; 1855e10e0cfcSBenny Halevy out: 1856e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1857e10e0cfcSBenny Halevy return status; 1858069b6ad4SAndy Adamson } 1859069b6ad4SAndy Adamson 1860a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1861328ead28SJ. Bruce Fields { 1862328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1863328ead28SJ. Bruce Fields 1864328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1865a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1866328ead28SJ. Bruce Fields return c; 1867328ead28SJ. Bruce Fields } 1868328ead28SJ. Bruce Fields } 1869328ead28SJ. Bruce Fields return NULL; 1870328ead28SJ. Bruce Fields } 1871328ead28SJ. Bruce Fields 1872a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1873328ead28SJ. Bruce Fields { 1874328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1875a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 187621b75b01SJ. Bruce Fields int ret; 1877328ead28SJ. Bruce Fields 1878328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1879a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1880328ead28SJ. Bruce Fields if (c) { 1881328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1882328ead28SJ. Bruce Fields free_conn(new); 1883328ead28SJ. Bruce Fields return; 1884328ead28SJ. Bruce Fields } 1885328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1886328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 188721b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 188821b75b01SJ. Bruce Fields if (ret) 188921b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 189021b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1891328ead28SJ. Bruce Fields return; 1892328ead28SJ. Bruce Fields } 1893328ead28SJ. Bruce Fields 1894868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1895868b89c3SMi Jinlong { 1896868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1897868b89c3SMi Jinlong 1898868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1899868b89c3SMi Jinlong } 1900868b89c3SMi Jinlong 1901ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1902ae82a8d0SMi Jinlong struct nfsd4_session *session) 1903ae82a8d0SMi Jinlong { 1904ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1905ae82a8d0SMi Jinlong 1906ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1907ae82a8d0SMi Jinlong } 1908ae82a8d0SMi Jinlong 1909069b6ad4SAndy Adamson __be32 1910b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1911069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1912069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1913069b6ad4SAndy Adamson { 1914f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1915b85d4c01SBenny Halevy struct nfsd4_session *session; 1916b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1917a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 191857b7b43bSJ. Bruce Fields __be32 status; 1919b85d4c01SBenny Halevy 1920f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1921f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1922f9bb94c4SAndy Adamson 1923a663bdd8SJ. Bruce Fields /* 1924a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1925a663bdd8SJ. Bruce Fields * below. 1926a663bdd8SJ. Bruce Fields */ 1927a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1928a663bdd8SJ. Bruce Fields if (!conn) 1929a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1930a663bdd8SJ. Bruce Fields 19319089f1b4SBenny Halevy spin_lock(&client_lock); 1932b85d4c01SBenny Halevy status = nfserr_badsession; 1933b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1934b85d4c01SBenny Halevy if (!session) 1935b85d4c01SBenny Halevy goto out; 1936b85d4c01SBenny Halevy 1937868b89c3SMi Jinlong status = nfserr_too_many_ops; 1938868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1939868b89c3SMi Jinlong goto out; 1940868b89c3SMi Jinlong 1941ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1942ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1943ae82a8d0SMi Jinlong goto out; 1944ae82a8d0SMi Jinlong 1945b85d4c01SBenny Halevy status = nfserr_badslot; 19466c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1947b85d4c01SBenny Halevy goto out; 1948b85d4c01SBenny Halevy 1949557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1950b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1951b85d4c01SBenny Halevy 1952a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1953a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1954a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1955a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1956a8dfdaebSAndy Adamson 195773e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 195873e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 1959b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1960bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 1961bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 1962bf5c43c8SJ. Bruce Fields goto out; 1963b85d4c01SBenny Halevy cstate->slot = slot; 1964b85d4c01SBenny Halevy cstate->session = session; 1965da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1966557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1967bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1968da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1969aaf84eb9SBenny Halevy goto out; 1970b85d4c01SBenny Halevy } 1971b85d4c01SBenny Halevy if (status) 1972b85d4c01SBenny Halevy goto out; 1973b85d4c01SBenny Halevy 1974a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1975a663bdd8SJ. Bruce Fields conn = NULL; 1976328ead28SJ. Bruce Fields 1977b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1978b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1979bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 198073e79482SJ. Bruce Fields if (seq->cachethis) 198173e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 1982bf5c43c8SJ. Bruce Fields else 1983bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 1984b85d4c01SBenny Halevy 1985b85d4c01SBenny Halevy cstate->slot = slot; 1986b85d4c01SBenny Halevy cstate->session = session; 1987b85d4c01SBenny Halevy 1988b85d4c01SBenny Halevy out: 198926c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1990aaf84eb9SBenny Halevy if (cstate->session) { 19910d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 19920d7bb719SJ. Bruce Fields 199336acb66bSBenny Halevy nfsd4_get_session(cstate->session); 19940d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 19955423732aSBenny Halevy switch (clp->cl_cb_state) { 19965423732aSBenny Halevy case NFSD4_CB_DOWN: 1997fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 19985423732aSBenny Halevy break; 19995423732aSBenny Halevy case NFSD4_CB_FAULT: 2000fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20015423732aSBenny Halevy break; 2002fc0c3dd1SBenny Halevy default: 2003fc0c3dd1SBenny Halevy seq->status_flags = 0; 20045423732aSBenny Halevy } 2005aaf84eb9SBenny Halevy } 2006a663bdd8SJ. Bruce Fields kfree(conn); 200736acb66bSBenny Halevy spin_unlock(&client_lock); 2008b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2009b85d4c01SBenny Halevy return status; 2010069b6ad4SAndy Adamson } 2011069b6ad4SAndy Adamson 2012345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 2013345c2842SMi Jinlong { 2014345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 2015345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 2016345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 2017345c2842SMi Jinlong } 2018345c2842SMi Jinlong 2019345c2842SMi Jinlong __be32 2020345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2021345c2842SMi Jinlong { 2022345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 202357b7b43bSJ. Bruce Fields __be32 status = 0; 2024345c2842SMi Jinlong 2025345c2842SMi Jinlong nfs4_lock_state(); 2026345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2027345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2028345c2842SMi Jinlong 2029345c2842SMi Jinlong if (conf) { 2030345c2842SMi Jinlong clp = conf; 2031345c2842SMi Jinlong 2032345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 2033345c2842SMi Jinlong status = nfserr_clientid_busy; 2034345c2842SMi Jinlong goto out; 2035345c2842SMi Jinlong } 2036345c2842SMi Jinlong 2037345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2038345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2039345c2842SMi Jinlong status = nfserr_clientid_busy; 2040345c2842SMi Jinlong goto out; 2041345c2842SMi Jinlong } 2042345c2842SMi Jinlong } else if (unconf) 2043345c2842SMi Jinlong clp = unconf; 2044345c2842SMi Jinlong else { 2045345c2842SMi Jinlong status = nfserr_stale_clientid; 2046345c2842SMi Jinlong goto out; 2047345c2842SMi Jinlong } 2048345c2842SMi Jinlong 2049345c2842SMi Jinlong expire_client(clp); 2050345c2842SMi Jinlong out: 2051345c2842SMi Jinlong nfs4_unlock_state(); 2052345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2053345c2842SMi Jinlong return status; 2054345c2842SMi Jinlong } 2055345c2842SMi Jinlong 2056069b6ad4SAndy Adamson __be32 20574dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 20584dc6ec00SJ. Bruce Fields { 205957b7b43bSJ. Bruce Fields __be32 status = 0; 2060bcecf1ccSMi Jinlong 20614dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 20624dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 20634dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 20644dc6ec00SJ. Bruce Fields /* 20654dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 20664dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 20674dc6ec00SJ. Bruce Fields */ 20684dc6ec00SJ. Bruce Fields return nfs_ok; 20694dc6ec00SJ. Bruce Fields } 2070bcecf1ccSMi Jinlong 20714dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2072bcecf1ccSMi Jinlong status = nfserr_complete_already; 2073a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2074a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2075bcecf1ccSMi Jinlong goto out; 2076bcecf1ccSMi Jinlong 2077bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2078bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 20794dc6ec00SJ. Bruce Fields /* 20804dc6ec00SJ. Bruce Fields * The following error isn't really legal. 20814dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 20824dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 20834dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 20844dc6ec00SJ. Bruce Fields * client. 20854dc6ec00SJ. Bruce Fields */ 2086bcecf1ccSMi Jinlong goto out; 2087bcecf1ccSMi Jinlong 2088bcecf1ccSMi Jinlong status = nfs_ok; 20892a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2090bcecf1ccSMi Jinlong out: 20914dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2092bcecf1ccSMi Jinlong return status; 20934dc6ec00SJ. Bruce Fields } 20944dc6ec00SJ. Bruce Fields 20954dc6ec00SJ. Bruce Fields __be32 2096b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2097b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 20981da177e4SLinus Torvalds { 2099a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21001da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21011da177e4SLinus Torvalds unsigned int strhashval; 210228ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2103b37ad28bSAl Viro __be32 status; 2104a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21051da177e4SLinus Torvalds 2106a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2107a55370a3SNeilBrown if (status) 210873aea4ecSNeil Brown return status; 2109a55370a3SNeilBrown 21101da177e4SLinus Torvalds /* 21111da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 21121da177e4SLinus Torvalds * We get here on a DRC miss. 21131da177e4SLinus Torvalds */ 21141da177e4SLinus Torvalds 2115a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21161da177e4SLinus Torvalds 21171da177e4SLinus Torvalds nfs4_lock_state(); 2118e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 211928ce6054SNeilBrown if (conf) { 2120a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 21211da177e4SLinus Torvalds status = nfserr_clid_inuse; 2122e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2123e203d506SJ. Bruce Fields goto out; 2124026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2125363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2126363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2127363168b4SJeff Layton sizeof(addr_str)); 2128026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2129363168b4SJeff Layton "at %s\n", addr_str); 21301da177e4SLinus Torvalds goto out; 21311da177e4SLinus Torvalds } 21321da177e4SLinus Torvalds } 2133a186e767SJ. Bruce Fields /* 2134a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 2135a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 2136a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 2137a186e767SJ. Bruce Fields */ 2138e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21393e772463SJ. Bruce Fields status = nfserr_jukebox; 21401da177e4SLinus Torvalds if (!conf) { 21411da177e4SLinus Torvalds /* 2142a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 2143a186e767SJ. Bruce Fields * placed first, because it is the normal case 21441da177e4SLinus Torvalds */ 21451da177e4SLinus Torvalds if (unconf) 21461da177e4SLinus Torvalds expire_client(unconf); 2147b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2148a55370a3SNeilBrown if (new == NULL) 21491da177e4SLinus Torvalds goto out; 21501da177e4SLinus Torvalds gen_clid(new); 2151599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 21521da177e4SLinus Torvalds /* 2153a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 2154a186e767SJ. Bruce Fields * probable callback update 21551da177e4SLinus Torvalds */ 215631f4a6c1SNeilBrown if (unconf) { 215731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 215831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 215931f4a6c1SNeilBrown * This has the advantage that there is at most 216031f4a6c1SNeilBrown * one {*x***} in either list at any time. 216131f4a6c1SNeilBrown */ 21621da177e4SLinus Torvalds expire_client(unconf); 21631da177e4SLinus Torvalds } 2164b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2165a55370a3SNeilBrown if (new == NULL) 21661da177e4SLinus Torvalds goto out; 21671da177e4SLinus Torvalds copy_clid(new, conf); 21681da177e4SLinus Torvalds } else if (!unconf) { 21691da177e4SLinus Torvalds /* 2170a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2171a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2172a186e767SJ. Bruce Fields * confirmed. 21731da177e4SLinus Torvalds */ 2174b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2175a55370a3SNeilBrown if (new == NULL) 21761da177e4SLinus Torvalds goto out; 21771da177e4SLinus Torvalds gen_clid(new); 217849ba8781SJ. Bruce Fields } else { 21791da177e4SLinus Torvalds /* 2180a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2181a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2182a186e767SJ. Bruce Fields * confirmed. 21831da177e4SLinus Torvalds */ 21841da177e4SLinus Torvalds expire_client(unconf); 2185b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2186a55370a3SNeilBrown if (new == NULL) 21871da177e4SLinus Torvalds goto out; 21881da177e4SLinus Torvalds gen_clid(new); 21891da177e4SLinus Torvalds } 21908323c3b2SJ. Bruce Fields /* 21918323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 21928323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 21938323c3b2SJ. Bruce Fields */ 21948323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 21956f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2196c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 21971da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 21981da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 21991da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22001da177e4SLinus Torvalds status = nfs_ok; 22011da177e4SLinus Torvalds out: 22021da177e4SLinus Torvalds nfs4_unlock_state(); 22031da177e4SLinus Torvalds return status; 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvalds /* 2208a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2209a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2210a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 22111da177e4SLinus Torvalds */ 2212b37ad28bSAl Viro __be32 2213b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2214b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2215b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22161da177e4SLinus Torvalds { 221721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22181da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22191da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2220b37ad28bSAl Viro __be32 status; 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22231da177e4SLinus Torvalds return nfserr_stale_clientid; 22241da177e4SLinus Torvalds /* 22251da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 22261da177e4SLinus Torvalds * We get here on a DRC miss. 22271da177e4SLinus Torvalds */ 22281da177e4SLinus Torvalds 22291da177e4SLinus Torvalds nfs4_lock_state(); 223021ab45a4SNeilBrown 223121ab45a4SNeilBrown conf = find_confirmed_client(clid); 223221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 223321ab45a4SNeilBrown 2234a186e767SJ. Bruce Fields /* 2235a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2236a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2237a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2238a186e767SJ. Bruce Fields */ 2239f07ea10dSChuck Lever status = nfserr_clid_inuse; 2240366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2241a186e767SJ. Bruce Fields /* 2242a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2243a186e767SJ. Bruce Fields * callback update 22447c79f737SNeilBrown */ 2245599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22461da177e4SLinus Torvalds status = nfserr_clid_inuse; 22471da177e4SLinus Torvalds else { 22485a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22495a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22501a69c179SNeilBrown expire_client(unconf); 22511da177e4SLinus Torvalds status = nfs_ok; 22521da177e4SLinus Torvalds } 2253f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2254a186e767SJ. Bruce Fields /* 2255a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2256a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2257a186e767SJ. Bruce Fields * do nothing. 22587c79f737SNeilBrown */ 2259599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22601da177e4SLinus Torvalds status = nfserr_clid_inuse; 226121ab45a4SNeilBrown else 22621da177e4SLinus Torvalds status = nfs_ok; 22637c79f737SNeilBrown } else if (!conf && unconf 2264599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2265a186e767SJ. Bruce Fields /* 2266a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2267a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 22681da177e4SLinus Torvalds */ 2269599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22701da177e4SLinus Torvalds status = nfserr_clid_inuse; 22711da177e4SLinus Torvalds } else { 22721a69c179SNeilBrown unsigned int hash = 22731a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22741a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2275e203d506SJ. Bruce Fields hash); 22761a69c179SNeilBrown if (conf) { 22772a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22781a69c179SNeilBrown expire_client(conf); 22791a69c179SNeilBrown } 22801da177e4SLinus Torvalds move_to_confirmed(unconf); 228121ab45a4SNeilBrown conf = unconf; 22825a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22831a69c179SNeilBrown status = nfs_ok; 22841da177e4SLinus Torvalds } 2285599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2286599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 22877c79f737SNeilBrown &confirm)))) { 2288a186e767SJ. Bruce Fields /* 2289a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2290a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 22911da177e4SLinus Torvalds */ 22921da177e4SLinus Torvalds status = nfserr_stale_clientid; 229308e8987cSNeilBrown } 2294f07ea10dSChuck Lever 22951da177e4SLinus Torvalds nfs4_unlock_state(); 22961da177e4SLinus Torvalds return status; 22971da177e4SLinus Torvalds } 22981da177e4SLinus Torvalds 229932513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23001da177e4SLinus Torvalds { 230132513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 230232513b40SJ. Bruce Fields } 230332513b40SJ. Bruce Fields 230432513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 230532513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 230632513b40SJ. Bruce Fields { 23071da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23081da177e4SLinus Torvalds 23098b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23101da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23118beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23128beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23131da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 231447f9940cSMeelap Shah fp->fi_had_conflict = false; 2315acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2316f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2317f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 231847cee541SPavel Emelyanov spin_lock(&recall_lock); 231947cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 232047cee541SPavel Emelyanov spin_unlock(&recall_lock); 23211da177e4SLinus Torvalds } 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds static void 2324e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2325e60d4398SNeilBrown { 2326e60d4398SNeilBrown if (*slab == NULL) 2327e60d4398SNeilBrown return; 23281a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2329e60d4398SNeilBrown *slab = NULL; 2330e60d4398SNeilBrown } 2331e60d4398SNeilBrown 2332e8ff2a84SJ. Bruce Fields void 2333e60d4398SNeilBrown nfsd4_free_slabs(void) 2334e60d4398SNeilBrown { 2335fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2336fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2337e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23385ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23395b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2340e60d4398SNeilBrown } 23411da177e4SLinus Torvalds 234272083396SBryan Schumaker int 23431da177e4SLinus Torvalds nfsd4_init_slabs(void) 23441da177e4SLinus Torvalds { 2345fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2346fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2347fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2348fe0750e5SJ. Bruce Fields goto out_nomem; 2349fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2350fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2351fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2352e60d4398SNeilBrown goto out_nomem; 2353e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 235420c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2355e60d4398SNeilBrown if (file_slab == NULL) 2356e60d4398SNeilBrown goto out_nomem; 23575ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2358dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23595ac049acSNeilBrown if (stateid_slab == NULL) 23605ac049acSNeilBrown goto out_nomem; 23615b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 236220c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23635b2d21c1SNeilBrown if (deleg_slab == NULL) 23645b2d21c1SNeilBrown goto out_nomem; 2365e60d4398SNeilBrown return 0; 2366e60d4398SNeilBrown out_nomem: 2367e60d4398SNeilBrown nfsd4_free_slabs(); 23681da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23691da177e4SLinus Torvalds return -ENOMEM; 23701da177e4SLinus Torvalds } 23711da177e4SLinus Torvalds 2372fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23731da177e4SLinus Torvalds { 2374fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2375fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2376fe0750e5SJ. Bruce Fields } 2377fe0750e5SJ. Bruce Fields 2378fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2379fe0750e5SJ. Bruce Fields { 2380fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2381fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23821da177e4SLinus Torvalds } 23831da177e4SLinus Torvalds 2384ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2385ff194bd9SJ. Bruce Fields { 2386ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2387ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2388ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2389ff194bd9SJ. Bruce Fields } 2390ff194bd9SJ. Bruce Fields 2391fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23921da177e4SLinus Torvalds { 23931da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23941da177e4SLinus Torvalds 2395fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2396ff194bd9SJ. Bruce Fields if (!sop) 2397ff194bd9SJ. Bruce Fields return NULL; 2398ff194bd9SJ. Bruce Fields 2399ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2400ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2401fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2402ff194bd9SJ. Bruce Fields return NULL; 2403ff194bd9SJ. Bruce Fields } 24041da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2405ff194bd9SJ. Bruce Fields 2406ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2407ff194bd9SJ. Bruce Fields sop->so_client = clp; 2408ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24091da177e4SLinus Torvalds return sop; 24101da177e4SLinus Torvalds } 2411ff194bd9SJ. Bruce Fields 2412fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2413ff194bd9SJ. Bruce Fields { 241416bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2415fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24161da177e4SLinus Torvalds } 24171da177e4SLinus Torvalds 2418fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24191da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2420fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24211da177e4SLinus Torvalds 2422fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2423fe0750e5SJ. Bruce Fields if (!oo) 24241da177e4SLinus Torvalds return NULL; 2425fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2426fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2427d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2428fe0750e5SJ. Bruce Fields oo->oo_time = 0; 242938c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2430fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2431fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2432fe0750e5SJ. Bruce Fields return oo; 24331da177e4SLinus Torvalds } 24341da177e4SLinus Torvalds 2435996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2436fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2437d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24381da177e4SLinus Torvalds 2439996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2440ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2441fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24428beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2443fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 244413cd2184SNeilBrown get_nfs4_file(fp); 24451da177e4SLinus Torvalds stp->st_file = fp; 24461da177e4SLinus Torvalds stp->st_access_bmap = 0; 24471da177e4SLinus Torvalds stp->st_deny_bmap = 0; 2448b6d2f1caSJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 24491da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24504c4cd222SNeilBrown stp->st_openstp = NULL; 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds 24531da177e4SLinus Torvalds static void 2454fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24551da177e4SLinus Torvalds { 2456fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24571da177e4SLinus Torvalds 2458fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2459fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds static int 2463599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2464599e0a22SJ. Bruce Fields clientid_t *clid) 2465599e0a22SJ. Bruce Fields { 2466599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2467599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2468599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24691da177e4SLinus Torvalds } 24701da177e4SLinus Torvalds 2471fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24721da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24731da177e4SLinus Torvalds { 2474a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2475a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24761da177e4SLinus Torvalds 247716bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 247816bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 247916bfdaafSJ. Bruce Fields continue; 2480a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2481a50d2ad1SJ. Bruce Fields oo = openowner(so); 2482a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2483a50d2ad1SJ. Bruce Fields return oo; 2484a50d2ad1SJ. Bruce Fields } 24851da177e4SLinus Torvalds } 24861da177e4SLinus Torvalds return NULL; 24871da177e4SLinus Torvalds } 24881da177e4SLinus Torvalds 24891da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24901da177e4SLinus Torvalds static struct nfs4_file * 24911da177e4SLinus Torvalds find_file(struct inode *ino) 24921da177e4SLinus Torvalds { 24931da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24941da177e4SLinus Torvalds struct nfs4_file *fp; 24951da177e4SLinus Torvalds 24968b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24971da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 249813cd2184SNeilBrown if (fp->fi_inode == ino) { 249913cd2184SNeilBrown get_nfs4_file(fp); 25008b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25011da177e4SLinus Torvalds return fp; 25021da177e4SLinus Torvalds } 250313cd2184SNeilBrown } 25048b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25051da177e4SLinus Torvalds return NULL; 25061da177e4SLinus Torvalds } 25071da177e4SLinus Torvalds 25084f83aa30SJ. Bruce Fields /* 25091da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25101da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25111da177e4SLinus Torvalds */ 2512b37ad28bSAl Viro static __be32 25131da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25141da177e4SLinus Torvalds { 25151da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25161da177e4SLinus Torvalds struct nfs4_file *fp; 2517dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2518b37ad28bSAl Viro __be32 ret; 25191da177e4SLinus Torvalds 25201da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25211da177e4SLinus Torvalds 25221da177e4SLinus Torvalds fp = find_file(ino); 252313cd2184SNeilBrown if (!fp) 252413cd2184SNeilBrown return nfs_ok; 2525b700949bSNeilBrown ret = nfserr_locked; 25261da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25278beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 25281da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 25291da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 253013cd2184SNeilBrown goto out; 25311da177e4SLinus Torvalds } 253213cd2184SNeilBrown ret = nfs_ok; 253313cd2184SNeilBrown out: 253413cd2184SNeilBrown put_nfs4_file(fp); 253513cd2184SNeilBrown return ret; 25361da177e4SLinus Torvalds } 25371da177e4SLinus Torvalds 25386b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25391da177e4SLinus Torvalds { 25401da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25411da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25421da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25431da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25441da177e4SLinus Torvalds * it's safe to take a reference: */ 25451da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25461da177e4SLinus Torvalds 25471da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25481da177e4SLinus Torvalds 2549460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25501da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25511da177e4SLinus Torvalds 25526b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25536b57d9c8SJ. Bruce Fields } 25546b57d9c8SJ. Bruce Fields 2555acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25566b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25576b57d9c8SJ. Bruce Fields { 2558acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2559acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25606b57d9c8SJ. Bruce Fields 2561acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2562acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2563acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25640272e1fdSJ. Bruce Fields /* 25650272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2566acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25676b57d9c8SJ. Bruce Fields * in time: 25680272e1fdSJ. Bruce Fields */ 25690272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25701da177e4SLinus Torvalds 25715d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2572acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2573acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25745d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25755d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25761da177e4SLinus Torvalds } 25771da177e4SLinus Torvalds 25781da177e4SLinus Torvalds static 25791da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25801da177e4SLinus Torvalds { 25811da177e4SLinus Torvalds if (arg & F_UNLCK) 25821da177e4SLinus Torvalds return lease_modify(onlist, arg); 25831da177e4SLinus Torvalds else 25841da177e4SLinus Torvalds return -EAGAIN; 25851da177e4SLinus Torvalds } 25861da177e4SLinus Torvalds 25877b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25888fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25898fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25901da177e4SLinus Torvalds }; 25911da177e4SLinus Torvalds 25927a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25937a8711c9SJ. Bruce Fields { 25947a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25957a8711c9SJ. Bruce Fields return nfs_ok; 25967a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25977a8711c9SJ. Bruce Fields return nfserr_replay_me; 25987a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25997a8711c9SJ. Bruce Fields return nfs_ok; 26007a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26017a8711c9SJ. Bruce Fields } 26021da177e4SLinus Torvalds 2603b37ad28bSAl Viro __be32 26046668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26056668958fSAndy Adamson struct nfsd4_open *open) 26061da177e4SLinus Torvalds { 26071da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26081da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26091da177e4SLinus Torvalds unsigned int strhashval; 2610fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26114cdc951bSJ. Bruce Fields __be32 status; 26121da177e4SLinus Torvalds 26131da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 26141da177e4SLinus Torvalds return nfserr_stale_clientid; 261532513b40SJ. Bruce Fields /* 261632513b40SJ. Bruce Fields * In case we need it later, after we've already created the 261732513b40SJ. Bruce Fields * file and don't want to risk a further failure: 261832513b40SJ. Bruce Fields */ 261932513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 262032513b40SJ. Bruce Fields if (open->op_file == NULL) 262132513b40SJ. Bruce Fields return nfserr_jukebox; 26221da177e4SLinus Torvalds 262316bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2624fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2625fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2626fe0750e5SJ. Bruce Fields if (!oo) { 26270f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26280f442aa2SJ. Bruce Fields if (clp == NULL) 26290f442aa2SJ. Bruce Fields return nfserr_expired; 2630bcf130f9SJ. Bruce Fields goto new_owner; 26310f442aa2SJ. Bruce Fields } 2632dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26330f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2634fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2635fe0750e5SJ. Bruce Fields release_openowner(oo); 2636fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2637bcf130f9SJ. Bruce Fields goto new_owner; 26380f442aa2SJ. Bruce Fields } 26394cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26404cdc951bSJ. Bruce Fields if (status) 26414cdc951bSJ. Bruce Fields return status; 26424cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26434cdc951bSJ. Bruce Fields goto alloc_stateid; 2644bcf130f9SJ. Bruce Fields new_owner: 2645fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2646fe0750e5SJ. Bruce Fields if (oo == NULL) 26473e772463SJ. Bruce Fields return nfserr_jukebox; 2648fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26494cdc951bSJ. Bruce Fields alloc_stateid: 26504cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26514cdc951bSJ. Bruce Fields if (!open->op_stp) 26524cdc951bSJ. Bruce Fields return nfserr_jukebox; 26530f442aa2SJ. Bruce Fields return nfs_ok; 26541da177e4SLinus Torvalds } 26551da177e4SLinus Torvalds 2656b37ad28bSAl Viro static inline __be32 26574a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26584a6e43e6SNeilBrown { 26594a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26604a6e43e6SNeilBrown return nfserr_openmode; 26614a6e43e6SNeilBrown else 26624a6e43e6SNeilBrown return nfs_ok; 26634a6e43e6SNeilBrown } 26644a6e43e6SNeilBrown 2665c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 266624a0111eSJ. Bruce Fields { 266724a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 266824a0111eSJ. Bruce Fields } 266924a0111eSJ. Bruce Fields 267038c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2671f459e453SJ. Bruce Fields { 2672f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2673f459e453SJ. Bruce Fields 267438c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2675f459e453SJ. Bruce Fields if (!ret) 2676f459e453SJ. Bruce Fields return NULL; 2677f459e453SJ. Bruce Fields return delegstateid(ret); 2678f459e453SJ. Bruce Fields } 2679f459e453SJ. Bruce Fields 26808b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26818b289b2cSJ. Bruce Fields { 26828b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26838b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26848b289b2cSJ. Bruce Fields } 26858b289b2cSJ. Bruce Fields 2686b37ad28bSAl Viro static __be32 268738c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2688567d9829SNeilBrown struct nfs4_delegation **dp) 2689567d9829SNeilBrown { 2690567d9829SNeilBrown int flags; 2691b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2692567d9829SNeilBrown 269338c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2694567d9829SNeilBrown if (*dp == NULL) 2695c44c5eebSNeilBrown goto out; 269624a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2697567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2698567d9829SNeilBrown if (status) 2699567d9829SNeilBrown *dp = NULL; 2700c44c5eebSNeilBrown out: 27018b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2702c44c5eebSNeilBrown return nfs_ok; 2703c44c5eebSNeilBrown if (status) 2704c44c5eebSNeilBrown return status; 2705dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2706c44c5eebSNeilBrown return nfs_ok; 2707567d9829SNeilBrown } 2708567d9829SNeilBrown 2709b37ad28bSAl Viro static __be32 2710dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27111da177e4SLinus Torvalds { 2712dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2713fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27141da177e4SLinus Torvalds 27158beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27161da177e4SLinus Torvalds /* ignore lock owners */ 27171da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27181da177e4SLinus Torvalds continue; 27191da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2720fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27211da177e4SLinus Torvalds *stpp = local; 27221da177e4SLinus Torvalds /* check for conflicting share reservations */ 27231da177e4SLinus Torvalds if (!test_share(local, open)) 272477eaae8dSJ. Bruce Fields return nfserr_share_denied; 27251da177e4SLinus Torvalds } 272677eaae8dSJ. Bruce Fields return nfs_ok; 27271da177e4SLinus Torvalds } 27281da177e4SLinus Torvalds 2729996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2730996e0938SJ. Bruce Fields { 2731996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27325ac049acSNeilBrown } 27335ac049acSNeilBrown 273421fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 273521fb4016SJ. Bruce Fields { 273621fb4016SJ. Bruce Fields int flags = 0; 273721fb4016SJ. Bruce Fields 273821fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 273921fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 274021fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 274121fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 274221fb4016SJ. Bruce Fields return flags; 274321fb4016SJ. Bruce Fields } 274421fb4016SJ. Bruce Fields 27450c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27460c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2747f9d7562fSJ. Bruce Fields { 2748f9d7562fSJ. Bruce Fields __be32 status; 27490c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27500c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27510c12eaffSCasey Bodley 2752f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2753f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2754f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2755f9d7562fSJ. Bruce Fields if (status) 2756f9d7562fSJ. Bruce Fields return status; 2757f9d7562fSJ. Bruce Fields } 2758f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2759f9d7562fSJ. Bruce Fields 2760f9d7562fSJ. Bruce Fields return nfs_ok; 2761f9d7562fSJ. Bruce Fields } 2762f9d7562fSJ. Bruce Fields 2763b37ad28bSAl Viro static inline __be32 27641da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27651da177e4SLinus Torvalds struct nfsd4_open *open) 27661da177e4SLinus Torvalds { 27671da177e4SLinus Torvalds struct iattr iattr = { 27681da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27691da177e4SLinus Torvalds .ia_size = 0, 27701da177e4SLinus Torvalds }; 27711da177e4SLinus Torvalds if (!open->op_truncate) 27721da177e4SLinus Torvalds return 0; 27731da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27749246585aSAl Viro return nfserr_inval; 27751da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27761da177e4SLinus Torvalds } 27771da177e4SLinus Torvalds 2778b37ad28bSAl Viro static __be32 2779dcef0413SJ. 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) 27801da177e4SLinus Torvalds { 2781b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27827d947842SJ. Bruce Fields bool new_access; 2783b37ad28bSAl Viro __be32 status; 27841da177e4SLinus Torvalds 27857d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2786f9d7562fSJ. Bruce Fields if (new_access) { 27870c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2788f9d7562fSJ. Bruce Fields if (status) 2789f9d7562fSJ. Bruce Fields return status; 27906c26d08fSJ. Bruce Fields } 27911da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27921da177e4SLinus Torvalds if (status) { 2793f9d7562fSJ. Bruce Fields if (new_access) { 2794f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2795f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2796f9d7562fSJ. Bruce Fields } 27971da177e4SLinus Torvalds return status; 27981da177e4SLinus Torvalds } 27991da177e4SLinus Torvalds /* remember the open */ 280024a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2801b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 28021da177e4SLinus Torvalds 28031da177e4SLinus Torvalds return nfs_ok; 28041da177e4SLinus Torvalds } 28051da177e4SLinus Torvalds 28061da177e4SLinus Torvalds 28071da177e4SLinus Torvalds static void 28081255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28091da177e4SLinus Torvalds { 2810dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28111da177e4SLinus Torvalds } 28121da177e4SLinus Torvalds 281314a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 281414a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 281514a24e99SJ. Bruce Fields { 281614a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 281714a24e99SJ. Bruce Fields return true; 281814a24e99SJ. Bruce Fields /* 281914a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 282014a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 282114a24e99SJ. Bruce Fields * until we hear otherwise: 282214a24e99SJ. Bruce Fields */ 282314a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 282414a24e99SJ. Bruce Fields } 282514a24e99SJ. Bruce Fields 282622d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 282722d38c4cSJ. Bruce Fields { 282822d38c4cSJ. Bruce Fields struct file_lock *fl; 282922d38c4cSJ. Bruce Fields 283022d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 283122d38c4cSJ. Bruce Fields if (!fl) 283222d38c4cSJ. Bruce Fields return NULL; 283322d38c4cSJ. Bruce Fields locks_init_lock(fl); 283422d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 283522d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 283622d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 283722d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2838acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 283922d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 284022d38c4cSJ. Bruce Fields return fl; 284122d38c4cSJ. Bruce Fields } 284222d38c4cSJ. Bruce Fields 2843edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2844edab9782SJ. Bruce Fields { 2845acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2846edab9782SJ. Bruce Fields struct file_lock *fl; 2847edab9782SJ. Bruce Fields int status; 2848edab9782SJ. Bruce Fields 2849edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2850edab9782SJ. Bruce Fields if (!fl) 2851edab9782SJ. Bruce Fields return -ENOMEM; 2852acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28532a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2854acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2855edab9782SJ. Bruce Fields if (status) { 2856acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2857edab9782SJ. Bruce Fields locks_free_lock(fl); 2858edab9782SJ. Bruce Fields return -ENOMEM; 2859edab9782SJ. Bruce Fields } 2860acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2861acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2862acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2863acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2864acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2865acfdf5c3SJ. Bruce Fields return 0; 2866acfdf5c3SJ. Bruce Fields } 2867acfdf5c3SJ. Bruce Fields 2868acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2869acfdf5c3SJ. Bruce Fields { 2870acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2871acfdf5c3SJ. Bruce Fields 2872acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2873acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2874acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2875acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2876acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2877acfdf5c3SJ. Bruce Fields return -EAGAIN; 2878acfdf5c3SJ. Bruce Fields } 2879acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2880acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2881acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28822a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2883edab9782SJ. Bruce Fields return 0; 2884edab9782SJ. Bruce Fields } 2885edab9782SJ. Bruce Fields 28864aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28874aa8913cSBenny Halevy { 28884aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28894aa8913cSBenny Halevy if (status == -EAGAIN) 28904aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28914aa8913cSBenny Halevy else { 28924aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28934aa8913cSBenny Halevy switch (open->op_deleg_want) { 28944aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28954aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28964aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28974aa8913cSBenny Halevy break; 28984aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28994aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29004aa8913cSBenny Halevy break; 29014aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29024aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29034aa8913cSBenny Halevy } 29044aa8913cSBenny Halevy } 29054aa8913cSBenny Halevy } 29064aa8913cSBenny Halevy 29071da177e4SLinus Torvalds /* 29081da177e4SLinus Torvalds * Attempt to hand out a delegation. 29091da177e4SLinus Torvalds */ 29101da177e4SLinus Torvalds static void 2911dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29121da177e4SLinus Torvalds { 29131da177e4SLinus Torvalds struct nfs4_delegation *dp; 2914fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 291514a24e99SJ. Bruce Fields int cb_up; 2916d24433cdSBenny Halevy int status = 0, flag = 0; 29171da177e4SLinus Torvalds 2918fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29191da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29207b190fecSNeilBrown open->op_recall = 0; 29217b190fecSNeilBrown switch (open->op_claim_type) { 29227b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29232bf23875SJ. Bruce Fields if (!cb_up) 29247b190fecSNeilBrown open->op_recall = 1; 29257b190fecSNeilBrown flag = open->op_delegate_type; 29267b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29271da177e4SLinus Torvalds goto out; 29287b190fecSNeilBrown break; 29297b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29307b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29317b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2932af558e33SJ. Bruce Fields if (locks_in_grace()) 29337b190fecSNeilBrown goto out; 2934dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29357b190fecSNeilBrown goto out; 29361da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29371da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29381da177e4SLinus Torvalds else 29391da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29407b190fecSNeilBrown break; 29417b190fecSNeilBrown default: 29427b190fecSNeilBrown goto out; 29437b190fecSNeilBrown } 29441da177e4SLinus Torvalds 2945fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2946dd239cc0SJ. Bruce Fields if (dp == NULL) 2947dd239cc0SJ. Bruce Fields goto out_no_deleg; 2948acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2949edab9782SJ. Bruce Fields if (status) 2950dd239cc0SJ. Bruce Fields goto out_free; 29511da177e4SLinus Torvalds 2952d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29531da177e4SLinus Torvalds 29548c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2955d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29561da177e4SLinus Torvalds out: 29571da177e4SLinus Torvalds open->op_delegate_type = flag; 2958d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2959d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2960d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2961d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2962d24433cdSBenny Halevy 29634aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29644aa8913cSBenny Halevy if (open->op_deleg_want) 29654aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2966d24433cdSBenny Halevy } 2967dd239cc0SJ. Bruce Fields return; 2968dd239cc0SJ. Bruce Fields out_free: 2969acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2970dd239cc0SJ. Bruce Fields out_no_deleg: 2971dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2972dd239cc0SJ. Bruce Fields goto out; 29731da177e4SLinus Torvalds } 29741da177e4SLinus Torvalds 2975e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2976e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2977e27f49c3SBenny Halevy { 2978e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2979e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2980e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2981e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2982e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2983e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2984e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2985e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2986e27f49c3SBenny Halevy } 2987e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2988e27f49c3SBenny Halevy * it already has, therefore we don't return 2989e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2990e27f49c3SBenny Halevy */ 2991e27f49c3SBenny Halevy } 2992e27f49c3SBenny Halevy 29931da177e4SLinus Torvalds /* 29941da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29951da177e4SLinus Torvalds */ 2996b37ad28bSAl Viro __be32 29971da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29981da177e4SLinus Torvalds { 29996668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 300038c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30011da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30021da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3003dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3004567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3005b37ad28bSAl Viro __be32 status; 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds /* 30081da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30091da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30101da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30111da177e4SLinus Torvalds */ 30121da177e4SLinus Torvalds fp = find_file(ino); 30131da177e4SLinus Torvalds if (fp) { 30141da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30151da177e4SLinus Torvalds goto out; 301638c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3017c44c5eebSNeilBrown if (status) 3018c44c5eebSNeilBrown goto out; 30191da177e4SLinus Torvalds } else { 3020c44c5eebSNeilBrown status = nfserr_bad_stateid; 30218b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3022c44c5eebSNeilBrown goto out; 30233e772463SJ. Bruce Fields status = nfserr_jukebox; 302432513b40SJ. Bruce Fields fp = open->op_file; 302532513b40SJ. Bruce Fields open->op_file = NULL; 302632513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30271da177e4SLinus Torvalds } 30281da177e4SLinus Torvalds 30291da177e4SLinus Torvalds /* 30301da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30311da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30321da177e4SLinus Torvalds */ 30331da177e4SLinus Torvalds if (stp) { 30341da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3035f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30361da177e4SLinus Torvalds if (status) 30371da177e4SLinus Torvalds goto out; 30381da177e4SLinus Torvalds } else { 30394cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3040567d9829SNeilBrown if (status) 30411da177e4SLinus Torvalds goto out; 30424cdc951bSJ. Bruce Fields stp = open->op_stp; 30434cdc951bSJ. Bruce Fields open->op_stp = NULL; 3044996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30451da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30461da177e4SLinus Torvalds if (status) { 30472283963fSJ. Bruce Fields release_open_stateid(stp); 30481da177e4SLinus Torvalds goto out; 30491da177e4SLinus Torvalds } 30501da177e4SLinus Torvalds } 3051dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3052dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30531da177e4SLinus Torvalds 3054d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3055dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30566668958fSAndy Adamson 3057d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3058d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3059d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3060d24433cdSBenny Halevy goto nodeleg; 3061d24433cdSBenny Halevy } 3062d24433cdSBenny Halevy } 3063d24433cdSBenny Halevy 30641da177e4SLinus Torvalds /* 30651da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30661da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30671da177e4SLinus Torvalds */ 30681da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3069d24433cdSBenny Halevy nodeleg: 30701da177e4SLinus Torvalds status = nfs_ok; 30711da177e4SLinus Torvalds 30728c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3073dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30741da177e4SLinus Torvalds out: 3075d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3076d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3077e27f49c3SBenny Halevy open->op_deleg_want) 3078e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3079d24433cdSBenny Halevy 308013cd2184SNeilBrown if (fp) 308113cd2184SNeilBrown put_nfs4_file(fp); 308237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30831255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30841da177e4SLinus Torvalds /* 30851da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30861da177e4SLinus Torvalds */ 30871da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3088dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30896668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30901da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30911da177e4SLinus Torvalds 30921da177e4SLinus Torvalds return status; 30931da177e4SLinus Torvalds } 30941da177e4SLinus Torvalds 3095d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3096d29b20cdSJ. Bruce Fields { 3097d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3098d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3099d29b20cdSJ. Bruce Fields 3100d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3101d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3102d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3103d29b20cdSJ. Bruce Fields if (status) { 3104d29b20cdSJ. Bruce Fields release_openowner(oo); 3105d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3106d29b20cdSJ. Bruce Fields } else 3107d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3108d29b20cdSJ. Bruce Fields } 3109d29b20cdSJ. Bruce Fields } 311032513b40SJ. Bruce Fields if (open->op_file) 311132513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31124cdc951bSJ. Bruce Fields if (open->op_stp) 31134cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3114d29b20cdSJ. Bruce Fields } 3115d29b20cdSJ. Bruce Fields 3116b37ad28bSAl Viro __be32 3117b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3118b591480bSJ.Bruce Fields clientid_t *clid) 31191da177e4SLinus Torvalds { 31201da177e4SLinus Torvalds struct nfs4_client *clp; 3121b37ad28bSAl Viro __be32 status; 31221da177e4SLinus Torvalds 31231da177e4SLinus Torvalds nfs4_lock_state(); 31241da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31251da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31261da177e4SLinus Torvalds status = nfserr_stale_clientid; 31271da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31281da177e4SLinus Torvalds goto out; 31291da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31301da177e4SLinus Torvalds status = nfserr_expired; 31311da177e4SLinus Torvalds if (clp == NULL) { 31321da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31331da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31341da177e4SLinus Torvalds goto out; 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds status = nfserr_cb_path_down; 3137ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 313877a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31391da177e4SLinus Torvalds goto out; 31401da177e4SLinus Torvalds status = nfs_ok; 31411da177e4SLinus Torvalds out: 31421da177e4SLinus Torvalds nfs4_unlock_state(); 31431da177e4SLinus Torvalds return status; 31441da177e4SLinus Torvalds } 31451da177e4SLinus Torvalds 3146c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3147af558e33SJ. Bruce Fields }; 3148af558e33SJ. Bruce Fields 314933dcc481SJeff Layton static bool grace_ended; 315033dcc481SJeff Layton 3151a76b4319SNeilBrown static void 3152af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3153a76b4319SNeilBrown { 315433dcc481SJeff Layton /* do nothing if grace period already ended */ 315533dcc481SJeff Layton if (grace_ended) 315633dcc481SJeff Layton return; 315733dcc481SJeff Layton 3158a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 315933dcc481SJeff Layton grace_ended = true; 31602a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3161af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3162e46b498cSJ. Bruce Fields /* 3163e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3164e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3165e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3166e46b498cSJ. Bruce Fields */ 3167e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3168a76b4319SNeilBrown } 3169a76b4319SNeilBrown 3170fd39ca9aSNeilBrown static time_t 31711da177e4SLinus Torvalds nfs4_laundromat(void) 31721da177e4SLinus Torvalds { 31731da177e4SLinus Torvalds struct nfs4_client *clp; 3174fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31751da177e4SLinus Torvalds struct nfs4_delegation *dp; 31761da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3177cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3178cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3179cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31801da177e4SLinus Torvalds 31811da177e4SLinus Torvalds nfs4_lock_state(); 31821da177e4SLinus Torvalds 31831da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3184af558e33SJ. Bruce Fields nfsd4_end_grace(); 318536acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 318636acb66bSBenny Halevy spin_lock(&client_lock); 31871da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31881da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31891da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31901da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31911da177e4SLinus Torvalds if (clientid_val > t) 31921da177e4SLinus Torvalds clientid_val = t; 31931da177e4SLinus Torvalds break; 31941da177e4SLinus Torvalds } 3195d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3196d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3197d7682988SBenny Halevy clp->cl_clientid.cl_id); 3198d7682988SBenny Halevy continue; 3199d7682988SBenny Halevy } 3200d7682988SBenny Halevy unhash_client_locked(clp); 3201d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 320236acb66bSBenny Halevy } 320336acb66bSBenny Halevy spin_unlock(&client_lock); 320436acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 320536acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32061da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32071da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32082a4317c5SJeff Layton nfsd4_client_record_remove(clp); 32091da177e4SLinus Torvalds expire_client(clp); 32101da177e4SLinus Torvalds } 32111da177e4SLinus Torvalds spin_lock(&recall_lock); 32121da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32131da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32141da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32151da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32161da177e4SLinus Torvalds if (test_val > u) 32171da177e4SLinus Torvalds test_val = u; 32181da177e4SLinus Torvalds break; 32191da177e4SLinus Torvalds } 32201da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32211da177e4SLinus Torvalds } 32221da177e4SLinus Torvalds spin_unlock(&recall_lock); 32231da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32241da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32251da177e4SLinus Torvalds unhash_delegation(dp); 32261da177e4SLinus Torvalds } 3227cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32281da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3229fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3230fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3231fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32321da177e4SLinus Torvalds if (test_val > u) 32331da177e4SLinus Torvalds test_val = u; 32341da177e4SLinus Torvalds break; 32351da177e4SLinus Torvalds } 3236fe0750e5SJ. Bruce Fields release_openowner(oo); 32371da177e4SLinus Torvalds } 32381da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32391da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32401da177e4SLinus Torvalds nfs4_unlock_state(); 32411da177e4SLinus Torvalds return clientid_val; 32421da177e4SLinus Torvalds } 32431da177e4SLinus Torvalds 3244a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3245a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3246a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3247a254b246SHarvey Harrison 3248a254b246SHarvey Harrison static void 3249c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32501da177e4SLinus Torvalds { 32511da177e4SLinus Torvalds time_t t; 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds t = nfs4_laundromat(); 32541da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 325558da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32561da177e4SLinus Torvalds } 32571da177e4SLinus Torvalds 3258f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3259f8816512SNeilBrown { 3260f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3261f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3262f7a4d872SJ. Bruce Fields return nfs_ok; 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static int 32661da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32671da177e4SLinus Torvalds { 3268d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3269e4e83ea4SJ. Bruce Fields return 0; 32708c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32718c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32721da177e4SLinus Torvalds return 1; 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds 32751da177e4SLinus Torvalds static inline int 32761da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 32771da177e4SLinus Torvalds { 32781da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 32791da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 32801da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds 32831da177e4SLinus Torvalds static inline int 32841da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 32851da177e4SLinus Torvalds { 32861da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 32871da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds 32901da177e4SLinus Torvalds static 3291dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32921da177e4SLinus Torvalds { 3293b37ad28bSAl Viro __be32 status = nfserr_openmode; 32941da177e4SLinus Torvalds 329502921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 329602921914SJ. Bruce Fields if (stp->st_openstp) 329702921914SJ. Bruce Fields stp = stp->st_openstp; 32981da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 32991da177e4SLinus Torvalds goto out; 33001da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 33011da177e4SLinus Torvalds goto out; 33021da177e4SLinus Torvalds status = nfs_ok; 33031da177e4SLinus Torvalds out: 33041da177e4SLinus Torvalds return status; 33051da177e4SLinus Torvalds } 33061da177e4SLinus Torvalds 3307b37ad28bSAl Viro static inline __be32 33081da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 33091da177e4SLinus Torvalds { 3310203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33111da177e4SLinus Torvalds return nfs_ok; 3312af558e33SJ. Bruce Fields else if (locks_in_grace()) { 331325985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33141da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33151da177e4SLinus Torvalds return nfserr_grace; 33161da177e4SLinus Torvalds } else if (flags & WR_STATE) 33171da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33181da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33191da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33201da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33211da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33221da177e4SLinus Torvalds } 33231da177e4SLinus Torvalds 33241da177e4SLinus Torvalds /* 33251da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33261da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33271da177e4SLinus Torvalds */ 33281da177e4SLinus Torvalds static inline int 332918f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33301da177e4SLinus Torvalds { 3331203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33321da177e4SLinus Torvalds } 33331da177e4SLinus Torvalds 333481b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 333581b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 333681b82965SJ. Bruce Fields { 333781b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 333881b82965SJ. Bruce Fields } 333981b82965SJ. Bruce Fields 334057b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33410836f587SJ. Bruce Fields { 33426668958fSAndy Adamson /* 33436668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33446668958fSAndy Adamson * when it is zero. 33456668958fSAndy Adamson */ 334628dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 334781b82965SJ. Bruce Fields return nfs_ok; 334881b82965SJ. Bruce Fields 334981b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 335081b82965SJ. Bruce Fields return nfs_ok; 33516668958fSAndy Adamson 33520836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 335381b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33540836f587SJ. Bruce Fields return nfserr_bad_stateid; 33550836f587SJ. Bruce Fields /* 335681b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 335781b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 335881b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 335981b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 336081b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 336181b82965SJ. Bruce Fields * but better performance may result in retrying IO that 336281b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 336381b82965SJ. Bruce Fields * reordered in flight: 33640836f587SJ. Bruce Fields */ 33650836f587SJ. Bruce Fields return nfserr_old_stateid; 33660836f587SJ. Bruce Fields } 33670836f587SJ. Bruce Fields 336838c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 336917456804SBryan Schumaker { 337097b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 337197b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 337297b7e3b6SJ. Bruce Fields __be32 status; 337317456804SBryan Schumaker 337417456804SBryan Schumaker if (STALE_STATEID(stateid)) 337597b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 337617456804SBryan Schumaker 337738c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 337897b7e3b6SJ. Bruce Fields if (!s) 337997b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 338036279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 338117456804SBryan Schumaker if (status) 338217456804SBryan Schumaker return status; 338397b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 338497b7e3b6SJ. Bruce Fields return nfs_ok; 338597b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 338697b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3387dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 338897b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 338997b7e3b6SJ. Bruce Fields return nfs_ok; 339017456804SBryan Schumaker } 339117456804SBryan Schumaker 339238c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 339338c2f4b1SJ. Bruce Fields { 339438c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 339538c2f4b1SJ. Bruce Fields 339638c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 339738c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 339838c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 339938c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 340038c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 340138c2f4b1SJ. Bruce Fields if (!cl) 340238c2f4b1SJ. Bruce Fields return nfserr_expired; 340338c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 340438c2f4b1SJ. Bruce Fields if (!*s) 340538c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 340638c2f4b1SJ. Bruce Fields return nfs_ok; 340738c2f4b1SJ. Bruce Fields 340838c2f4b1SJ. Bruce Fields } 340938c2f4b1SJ. Bruce Fields 34101da177e4SLinus Torvalds /* 34111da177e4SLinus Torvalds * Checks for stateid operations 34121da177e4SLinus Torvalds */ 3413b37ad28bSAl Viro __be32 3414dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3415dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34161da177e4SLinus Torvalds { 341769064a27SJ. Bruce Fields struct nfs4_stid *s; 3418dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34191da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3420dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34211da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3422b37ad28bSAl Viro __be32 status; 34231da177e4SLinus Torvalds 34241da177e4SLinus Torvalds if (filpp) 34251da177e4SLinus Torvalds *filpp = NULL; 34261da177e4SLinus Torvalds 342718f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34281da177e4SLinus Torvalds return nfserr_grace; 34291da177e4SLinus Torvalds 34301da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34311da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34321da177e4SLinus Torvalds 343338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 343438c2f4b1SJ. Bruce Fields if (status) 343538c2f4b1SJ. Bruce Fields return status; 343669064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34370c2a498fSJ. Bruce Fields if (status) 34380c2a498fSJ. Bruce Fields goto out; 3439f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3440f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 344169064a27SJ. Bruce Fields dp = delegstateid(s); 3442dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3443dc9bf700SJ. Bruce Fields if (status) 3444dc9bf700SJ. Bruce Fields goto out; 344543b0178eSDan Carpenter if (filpp) { 3446acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3447f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 344843b0178eSDan Carpenter } 3449f7a4d872SJ. Bruce Fields break; 3450f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3451f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 345269064a27SJ. Bruce Fields stp = openlockstateid(s); 3453f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3454f7a4d872SJ. Bruce Fields if (status) 34551da177e4SLinus Torvalds goto out; 3456fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3457dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34581da177e4SLinus Torvalds goto out; 3459a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3460a4455be0SJ. Bruce Fields if (status) 34611da177e4SLinus Torvalds goto out; 3462f9d7562fSJ. Bruce Fields if (filpp) { 3463f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3464f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3465f9d7562fSJ. Bruce Fields else 3466f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3467f9d7562fSJ. Bruce Fields } 3468f7a4d872SJ. Bruce Fields break; 3469f7a4d872SJ. Bruce Fields default: 3470f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34711da177e4SLinus Torvalds } 34721da177e4SLinus Torvalds status = nfs_ok; 34731da177e4SLinus Torvalds out: 34741da177e4SLinus Torvalds return status; 34751da177e4SLinus Torvalds } 34761da177e4SLinus Torvalds 3477e1ca12dfSBryan Schumaker static __be32 3478dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3479e1ca12dfSBryan Schumaker { 3480fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3481e1ca12dfSBryan Schumaker return nfserr_locks_held; 3482e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3483e1ca12dfSBryan Schumaker return nfs_ok; 3484e1ca12dfSBryan Schumaker } 3485e1ca12dfSBryan Schumaker 3486e1ca12dfSBryan Schumaker /* 348717456804SBryan Schumaker * Test if the stateid is valid 348817456804SBryan Schumaker */ 348917456804SBryan Schumaker __be32 349017456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 349117456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 349217456804SBryan Schumaker { 349303cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 349403cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 349503cfb420SBryan Schumaker 349603cfb420SBryan Schumaker nfs4_lock_state(); 349703cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 349803cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 349903cfb420SBryan Schumaker nfs4_unlock_state(); 350003cfb420SBryan Schumaker 350117456804SBryan Schumaker return nfs_ok; 350217456804SBryan Schumaker } 350317456804SBryan Schumaker 3504e1ca12dfSBryan Schumaker __be32 3505e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3506e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3507e1ca12dfSBryan Schumaker { 3508e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35092da1cec7SJ. Bruce Fields struct nfs4_stid *s; 351038c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35112da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3512e1ca12dfSBryan Schumaker 3513e1ca12dfSBryan Schumaker nfs4_lock_state(); 351438c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35152da1cec7SJ. Bruce Fields if (!s) 3516e1ca12dfSBryan Schumaker goto out; 35172da1cec7SJ. Bruce Fields switch (s->sc_type) { 35182da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3519e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3520e1ca12dfSBryan Schumaker goto out; 35212da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35222da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35232da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35242da1cec7SJ. Bruce Fields if (ret) 3525e1ca12dfSBryan Schumaker goto out; 35262da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35272da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35282da1cec7SJ. Bruce Fields else 35292da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3530f7a4d872SJ. Bruce Fields break; 3531f7a4d872SJ. Bruce Fields default: 3532f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3533e1ca12dfSBryan Schumaker } 3534e1ca12dfSBryan Schumaker out: 3535e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3536e1ca12dfSBryan Schumaker return ret; 3537e1ca12dfSBryan Schumaker } 3538e1ca12dfSBryan Schumaker 35394c4cd222SNeilBrown static inline int 35404c4cd222SNeilBrown setlkflg (int type) 35414c4cd222SNeilBrown { 35424c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35434c4cd222SNeilBrown RD_STATE : WR_STATE; 35444c4cd222SNeilBrown } 35451da177e4SLinus Torvalds 3546dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3547c0a5d93eSJ. Bruce Fields { 3548c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3549c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3550c0a5d93eSJ. Bruce Fields __be32 status; 3551c0a5d93eSJ. Bruce Fields 3552c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3553c0a5d93eSJ. Bruce Fields if (status) 3554c0a5d93eSJ. Bruce Fields return status; 3555f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3556f7a4d872SJ. Bruce Fields /* 3557f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3558f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3559f7a4d872SJ. Bruce Fields */ 3560f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3561f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3562f7a4d872SJ. Bruce Fields if (status) 3563f7a4d872SJ. Bruce Fields return status; 3564f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3565c0a5d93eSJ. Bruce Fields } 3566c0a5d93eSJ. Bruce Fields 35671da177e4SLinus Torvalds /* 35681da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35691da177e4SLinus Torvalds */ 3570b37ad28bSAl Viro static __be32 3571dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35722288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3573dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35741da177e4SLinus Torvalds { 35750836f587SJ. Bruce Fields __be32 status; 357638c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35771da177e4SLinus Torvalds 35788c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35798c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35801da177e4SLinus Torvalds 35811da177e4SLinus Torvalds *stpp = NULL; 358238c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3583c0a5d93eSJ. Bruce Fields if (status) 3584c0a5d93eSJ. Bruce Fields return status; 358538c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3586c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35871da177e4SLinus Torvalds 3588c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35891da177e4SLinus Torvalds } 35901da177e4SLinus Torvalds 3591dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3592c0a5d93eSJ. Bruce Fields { 3593c0a5d93eSJ. Bruce Fields __be32 status; 3594c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35951da177e4SLinus Torvalds 3596c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35972288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35980836f587SJ. Bruce Fields if (status) 35990836f587SJ. Bruce Fields return status; 3600c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3601dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3602c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36033a4f98bbSNeilBrown return nfs_ok; 36041da177e4SLinus Torvalds } 36051da177e4SLinus Torvalds 3606b37ad28bSAl Viro __be32 3607ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3608a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36091da177e4SLinus Torvalds { 3610b37ad28bSAl Viro __be32 status; 3611fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3612dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36131da177e4SLinus Torvalds 36141da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3615ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3616ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36171da177e4SLinus Torvalds 3618ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3619a8cddc5dSJ. Bruce Fields if (status) 3620a8cddc5dSJ. Bruce Fields return status; 36211da177e4SLinus Torvalds 36221da177e4SLinus Torvalds nfs4_lock_state(); 36231da177e4SLinus Torvalds 36249072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3625ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36262288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36279072d5c6SJ. Bruce Fields if (status) 36281da177e4SLinus Torvalds goto out; 3629fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 363068b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3631dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 363268b66e82SJ. Bruce Fields goto out; 3633dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3634dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3635dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36368c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3637dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3638c7b9a459SNeilBrown 36392a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 364068b66e82SJ. Bruce Fields status = nfs_ok; 36411da177e4SLinus Torvalds out: 36425ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36431da177e4SLinus Torvalds nfs4_unlock_state(); 36441da177e4SLinus Torvalds return status; 36451da177e4SLinus Torvalds } 36461da177e4SLinus Torvalds 36476409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36481da177e4SLinus Torvalds { 36496409a5a6SJ. Bruce Fields if (!test_bit(access, &stp->st_access_bmap)) 36506409a5a6SJ. Bruce Fields return; 36516409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 36526409a5a6SJ. Bruce Fields __clear_bit(access, &stp->st_access_bmap); 3653f197c271SJ. Bruce Fields } 36546409a5a6SJ. Bruce Fields 36556409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36566409a5a6SJ. Bruce Fields { 36576409a5a6SJ. Bruce Fields switch (to_access) { 36586409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36596409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36606409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36616409a5a6SJ. Bruce Fields break; 36626409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36636409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36646409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36656409a5a6SJ. Bruce Fields break; 36666409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36676409a5a6SJ. Bruce Fields break; 36686409a5a6SJ. Bruce Fields default: 36696409a5a6SJ. Bruce Fields BUG(); 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds } 36721da177e4SLinus Torvalds 36731da177e4SLinus Torvalds static void 36741da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 36751da177e4SLinus Torvalds { 36761da177e4SLinus Torvalds int i; 36771da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36781da177e4SLinus Torvalds if ((i & deny) != i) 36791da177e4SLinus Torvalds __clear_bit(i, bmap); 36801da177e4SLinus Torvalds } 36811da177e4SLinus Torvalds } 36821da177e4SLinus Torvalds 3683b37ad28bSAl Viro __be32 3684ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3685ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3686a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36871da177e4SLinus Torvalds { 3688b37ad28bSAl Viro __be32 status; 3689dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36901da177e4SLinus Torvalds 36911da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3692ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3693ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36941da177e4SLinus Torvalds 3695c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36962c8bd7e0SBenny Halevy if (od->od_deleg_want) 36972c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36982c8bd7e0SBenny Halevy od->od_deleg_want); 36991da177e4SLinus Torvalds 37001da177e4SLinus Torvalds nfs4_lock_state(); 3701c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3702c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37039072d5c6SJ. Bruce Fields if (status) 37041da177e4SLinus Torvalds goto out; 37051da177e4SLinus Torvalds status = nfserr_inval; 37061da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 37071da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 37081da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37091da177e4SLinus Torvalds goto out; 37101da177e4SLinus Torvalds } 37111da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 37121da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37131da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37141da177e4SLinus Torvalds goto out; 37151da177e4SLinus Torvalds } 37166409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37171da177e4SLinus Torvalds 37181da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 37191da177e4SLinus Torvalds 3720dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3721dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37221da177e4SLinus Torvalds status = nfs_ok; 37231da177e4SLinus Torvalds out: 37245ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37251da177e4SLinus Torvalds nfs4_unlock_state(); 37261da177e4SLinus Torvalds return status; 37271da177e4SLinus Torvalds } 37281da177e4SLinus Torvalds 372938c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 373038c387b5SJ. Bruce Fields { 373138c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 373238c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 373338c387b5SJ. Bruce Fields 373438c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 373538c387b5SJ. Bruce Fields return; 373638c387b5SJ. Bruce Fields oo = openowner(so); 373738c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 373838c387b5SJ. Bruce Fields if (!s) 373938c387b5SJ. Bruce Fields return; 374038c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 374138c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 374238c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 374338c387b5SJ. Bruce Fields return; 374438c387b5SJ. Bruce Fields } 374538c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3746f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3747f7a4d872SJ. Bruce Fields } 3748f7a4d872SJ. Bruce Fields 3749f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3750f7a4d872SJ. Bruce Fields { 3751f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3752f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 375338c387b5SJ. Bruce Fields } 375438c387b5SJ. Bruce Fields 37551da177e4SLinus Torvalds /* 37561da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37571da177e4SLinus Torvalds */ 3758b37ad28bSAl Viro __be32 3759ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3760a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37611da177e4SLinus Torvalds { 3762b37ad28bSAl Viro __be32 status; 3763fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3764dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37651da177e4SLinus Torvalds 37661da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3767ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3768ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37691da177e4SLinus Torvalds 37701da177e4SLinus Torvalds nfs4_lock_state(); 3771f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3772f7a4d872SJ. Bruce Fields &close->cl_stateid, 3773f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3774f7a4d872SJ. Bruce Fields &stp); 37759072d5c6SJ. Bruce Fields if (status) 37761da177e4SLinus Torvalds goto out; 3777fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37781da177e4SLinus Torvalds status = nfs_ok; 3779dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3780dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37811da177e4SLinus Torvalds 3782f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 378338c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 378404ef5954SJ. Bruce Fields 378504ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 378604ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 378704ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 378804ef5954SJ. Bruce Fields */ 3789fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3790fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 37911da177e4SLinus Torvalds out: 37925ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37931da177e4SLinus Torvalds nfs4_unlock_state(); 37941da177e4SLinus Torvalds return status; 37951da177e4SLinus Torvalds } 37961da177e4SLinus Torvalds 3797b37ad28bSAl Viro __be32 3798ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3799ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38001da177e4SLinus Torvalds { 3801203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3802203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 380338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3804203a8c8eSJ. Bruce Fields struct inode *inode; 3805b37ad28bSAl Viro __be32 status; 38061da177e4SLinus Torvalds 3807ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3808203a8c8eSJ. Bruce Fields return status; 3809203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38101da177e4SLinus Torvalds 38111da177e4SLinus Torvalds nfs4_lock_state(); 381238c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 381338c2f4b1SJ. Bruce Fields if (status) 3814203a8c8eSJ. Bruce Fields goto out; 381538c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3816d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3817203a8c8eSJ. Bruce Fields if (status) 3818203a8c8eSJ. Bruce Fields goto out; 3819203a8c8eSJ. Bruce Fields 3820203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38211da177e4SLinus Torvalds out: 3822203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3823203a8c8eSJ. Bruce Fields 38241da177e4SLinus Torvalds return status; 38251da177e4SLinus Torvalds } 38261da177e4SLinus Torvalds 38271da177e4SLinus Torvalds 38281da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38291da177e4SLinus Torvalds 3830009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3831009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3832009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38331da177e4SLinus Torvalds 383487df4de8SBenny Halevy static inline u64 383587df4de8SBenny Halevy end_offset(u64 start, u64 len) 383687df4de8SBenny Halevy { 383787df4de8SBenny Halevy u64 end; 383887df4de8SBenny Halevy 383987df4de8SBenny Halevy end = start + len; 384087df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 384187df4de8SBenny Halevy } 384287df4de8SBenny Halevy 384387df4de8SBenny Halevy /* last octet in a range */ 384487df4de8SBenny Halevy static inline u64 384587df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 384687df4de8SBenny Halevy { 384787df4de8SBenny Halevy u64 end; 384887df4de8SBenny Halevy 384987df4de8SBenny Halevy BUG_ON(!len); 385087df4de8SBenny Halevy end = start + len; 385187df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 385287df4de8SBenny Halevy } 385387df4de8SBenny Halevy 3854009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38551da177e4SLinus Torvalds { 38561da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38571da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3858009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38591da177e4SLinus Torvalds } 38601da177e4SLinus Torvalds 3861009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38621da177e4SLinus Torvalds 38631da177e4SLinus Torvalds /* 38641da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38651da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38661da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38671da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38681da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38691da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38701da177e4SLinus Torvalds */ 38711da177e4SLinus Torvalds static inline void 38721da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38731da177e4SLinus Torvalds { 38741da177e4SLinus Torvalds if (lock->fl_start < 0) 38751da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38761da177e4SLinus Torvalds if (lock->fl_end < 0) 38771da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38781da177e4SLinus Torvalds } 38791da177e4SLinus Torvalds 3880d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3881d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38827b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3883d5b9026aSNeilBrown }; 38841da177e4SLinus Torvalds 38851da177e4SLinus Torvalds static inline void 38861da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38871da177e4SLinus Torvalds { 3888fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38891da177e4SLinus Torvalds 3890d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3891fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3892fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3893fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38947c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38957c13f344SJ. Bruce Fields /* We just don't care that much */ 38967c13f344SJ. Bruce Fields goto nevermind; 3897fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3898fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3899d5b9026aSNeilBrown } else { 39007c13f344SJ. Bruce Fields nevermind: 39017c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39027c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3903d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3904d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39051da177e4SLinus Torvalds } 39061da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 390787df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 390887df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39091da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39101da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39111da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39121da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39131da177e4SLinus Torvalds } 39141da177e4SLinus Torvalds 3915b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3916b93d87c1SJ. Bruce Fields { 3917b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3918b93d87c1SJ. Bruce Fields 3919b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3920b93d87c1SJ. Bruce Fields return false; 3921b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3922b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3923b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3924b93d87c1SJ. Bruce Fields } 3925b93d87c1SJ. Bruce Fields 3926fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3927fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39281da177e4SLinus Torvalds struct xdr_netobj *owner) 39291da177e4SLinus Torvalds { 3930009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3931b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39321da177e4SLinus Torvalds 3933009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3934b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3935b93d87c1SJ. Bruce Fields return lo; 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds return NULL; 39381da177e4SLinus Torvalds } 39391da177e4SLinus Torvalds 3940dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3941ff194bd9SJ. Bruce Fields { 3942009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3943009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3944009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3945009673b4SJ. Bruce Fields 394616bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3947009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3948fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3949ff194bd9SJ. Bruce Fields } 3950ff194bd9SJ. Bruce Fields 39511da177e4SLinus Torvalds /* 39521da177e4SLinus Torvalds * Alloc a lock owner structure. 39531da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 395425985edcSLucas De Marchi * occurred. 39551da177e4SLinus Torvalds * 395616bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39571da177e4SLinus Torvalds */ 39581da177e4SLinus Torvalds 3959fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3960dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3961fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39621da177e4SLinus Torvalds 3963fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3964fe0750e5SJ. Bruce Fields if (!lo) 39651da177e4SLinus Torvalds return NULL; 3966fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3967fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3968b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3969b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3970fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3971fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3972fe0750e5SJ. Bruce Fields return lo; 39731da177e4SLinus Torvalds } 39741da177e4SLinus Torvalds 3975dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3976dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39771da177e4SLinus Torvalds { 3978dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3979d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39801da177e4SLinus Torvalds 3981996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39825ac049acSNeilBrown if (stp == NULL) 39836136d2b4SJ. Bruce Fields return NULL; 3984996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39858beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3986fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3987fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 398813cd2184SNeilBrown get_nfs4_file(fp); 39891da177e4SLinus Torvalds stp->st_file = fp; 39900997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39911da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39924c4cd222SNeilBrown stp->st_openstp = open_stp; 39931da177e4SLinus Torvalds return stp; 39941da177e4SLinus Torvalds } 39951da177e4SLinus Torvalds 3996fd39ca9aSNeilBrown static int 39971da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39981da177e4SLinus Torvalds { 399987df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40001da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40011da177e4SLinus Torvalds } 40021da177e4SLinus Torvalds 4003dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40040997b173SJ. Bruce Fields { 40050997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40060997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40070997b173SJ. Bruce Fields 40080997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 40090997b173SJ. Bruce Fields return; 40100997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 40110997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 40120997b173SJ. Bruce Fields } 40130997b173SJ. Bruce Fields 40142355c596SJ. 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) 401564a284d0SJ. Bruce Fields { 401664a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 401764a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 401864a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 401964a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 402064a284d0SJ. Bruce Fields unsigned int strhashval; 402164a284d0SJ. Bruce Fields 402264a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 402364a284d0SJ. Bruce Fields if (lo) { 402464a284d0SJ. Bruce Fields if (!cstate->minorversion) 402564a284d0SJ. Bruce Fields return nfserr_bad_seqid; 402664a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 402764a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 402864a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 402964a284d0SJ. Bruce Fields return nfs_ok; 403064a284d0SJ. Bruce Fields } 403116bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 403264a284d0SJ. Bruce Fields &lock->v.new.owner); 403364a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 403464a284d0SJ. Bruce Fields if (lo == NULL) 403564a284d0SJ. Bruce Fields return nfserr_jukebox; 403664a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 403764a284d0SJ. Bruce Fields if (*lst == NULL) { 403864a284d0SJ. Bruce Fields release_lockowner(lo); 403964a284d0SJ. Bruce Fields return nfserr_jukebox; 404064a284d0SJ. Bruce Fields } 404164a284d0SJ. Bruce Fields *new = true; 404264a284d0SJ. Bruce Fields return nfs_ok; 404364a284d0SJ. Bruce Fields } 404464a284d0SJ. Bruce Fields 40451da177e4SLinus Torvalds /* 40461da177e4SLinus Torvalds * LOCK operation 40471da177e4SLinus Torvalds */ 4048b37ad28bSAl Viro __be32 4049ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4050a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40511da177e4SLinus Torvalds { 4052fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4053fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4054dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40557d947842SJ. Bruce Fields struct file *filp = NULL; 40561da177e4SLinus Torvalds struct file_lock file_lock; 40578dc7c311SAndy Adamson struct file_lock conflock; 4058b37ad28bSAl Viro __be32 status = 0; 405964a284d0SJ. Bruce Fields bool new_state = false; 4060b34f27aaSJ. Bruce Fields int lkflg; 4061b8dd7b9aSAl Viro int err; 40621da177e4SLinus Torvalds 40631da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40641da177e4SLinus Torvalds (long long) lock->lk_offset, 40651da177e4SLinus Torvalds (long long) lock->lk_length); 40661da177e4SLinus Torvalds 40671da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40681da177e4SLinus Torvalds return nfserr_inval; 40691da177e4SLinus Torvalds 4070ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40718837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4072a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4073a6f6ef2fSAndy Adamson return status; 4074a6f6ef2fSAndy Adamson } 4075a6f6ef2fSAndy Adamson 40761da177e4SLinus Torvalds nfs4_lock_state(); 40771da177e4SLinus Torvalds 40781da177e4SLinus Torvalds if (lock->lk_is_new) { 40791da177e4SLinus Torvalds /* 40801da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4081893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4082893f8770SNeilBrown * lock stateid. 40831da177e4SLinus Torvalds */ 4084dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40851da177e4SLinus Torvalds 4086684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4087684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4088684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4089684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4090684e5638SJ. Bruce Fields sizeof(clientid_t)); 4091684e5638SJ. Bruce Fields 40921da177e4SLinus Torvalds status = nfserr_stale_clientid; 4093684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40941da177e4SLinus Torvalds goto out; 40951da177e4SLinus Torvalds 40961da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4097c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40981da177e4SLinus Torvalds lock->lk_new_open_seqid, 40991da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4100c0a5d93eSJ. Bruce Fields &open_stp); 410137515177SNeilBrown if (status) 41021da177e4SLinus Torvalds goto out; 4103fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4104b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4105684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4106b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4107b34f27aaSJ. Bruce Fields goto out; 410864a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 410964a284d0SJ. Bruce Fields &lock_stp, &new_state); 411064a284d0SJ. Bruce Fields if (status) 41111da177e4SLinus Torvalds goto out; 41121da177e4SLinus Torvalds } else { 41131da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4114dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41151da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41161da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41172288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41181da177e4SLinus Torvalds if (status) 41191da177e4SLinus Torvalds goto out; 412064a284d0SJ. Bruce Fields } 4121fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41221da177e4SLinus Torvalds 4123b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4124b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4125b34f27aaSJ. Bruce Fields if (status) 4126b34f27aaSJ. Bruce Fields goto out; 4127b34f27aaSJ. Bruce Fields 41280dd395dcSNeilBrown status = nfserr_grace; 4129af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41300dd395dcSNeilBrown goto out; 41310dd395dcSNeilBrown status = nfserr_no_grace; 4132af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41330dd395dcSNeilBrown goto out; 41340dd395dcSNeilBrown 41351da177e4SLinus Torvalds locks_init_lock(&file_lock); 41361da177e4SLinus Torvalds switch (lock->lk_type) { 41371da177e4SLinus Torvalds case NFS4_READ_LT: 41381da177e4SLinus Torvalds case NFS4_READW_LT: 4139f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41400997b173SJ. Bruce Fields if (filp) 41410997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41421da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41431da177e4SLinus Torvalds break; 41441da177e4SLinus Torvalds case NFS4_WRITE_LT: 41451da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4146f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41470997b173SJ. Bruce Fields if (filp) 41480997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41491da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41501da177e4SLinus Torvalds break; 41511da177e4SLinus Torvalds default: 41521da177e4SLinus Torvalds status = nfserr_inval; 41531da177e4SLinus Torvalds goto out; 41541da177e4SLinus Torvalds } 4155f9d7562fSJ. Bruce Fields if (!filp) { 4156f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4157f9d7562fSJ. Bruce Fields goto out; 4158f9d7562fSJ. Bruce Fields } 4159b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41601da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41611da177e4SLinus Torvalds file_lock.fl_file = filp; 41621da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4163d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41641da177e4SLinus Torvalds 41651da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 416687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41671da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41681da177e4SLinus Torvalds 41691da177e4SLinus Torvalds /* 41701da177e4SLinus Torvalds * Try to lock the file in the VFS. 41711da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41721da177e4SLinus Torvalds */ 41731da177e4SLinus Torvalds 4174529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4175b8dd7b9aSAl Viro switch (-err) { 41761da177e4SLinus Torvalds case 0: /* success! */ 4177dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4178dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41791da177e4SLinus Torvalds sizeof(stateid_t)); 4180b8dd7b9aSAl Viro status = 0; 4181eb76b3fdSAndy Adamson break; 4182eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4183eb76b3fdSAndy Adamson status = nfserr_denied; 4184eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4185eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4186eb76b3fdSAndy Adamson break; 41871da177e4SLinus Torvalds case (EDEADLK): 41881da177e4SLinus Torvalds status = nfserr_deadlock; 4189eb76b3fdSAndy Adamson break; 41901da177e4SLinus Torvalds default: 4191fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41923e772463SJ. Bruce Fields status = nfserrno(err); 4193eb76b3fdSAndy Adamson break; 41941da177e4SLinus Torvalds } 41951da177e4SLinus Torvalds out: 419664a284d0SJ. Bruce Fields if (status && new_state) 4197f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41985ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41991da177e4SLinus Torvalds nfs4_unlock_state(); 42001da177e4SLinus Torvalds return status; 42011da177e4SLinus Torvalds } 42021da177e4SLinus Torvalds 42031da177e4SLinus Torvalds /* 420455ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 420555ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 420655ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 420755ef1274SJ. Bruce Fields * inode operation.) 420855ef1274SJ. Bruce Fields */ 420955ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 421055ef1274SJ. Bruce Fields { 421155ef1274SJ. Bruce Fields struct file *file; 421255ef1274SJ. Bruce Fields int err; 421355ef1274SJ. Bruce Fields 421455ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 421555ef1274SJ. Bruce Fields if (err) 421655ef1274SJ. Bruce Fields return err; 421755ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 421855ef1274SJ. Bruce Fields nfsd_close(file); 421955ef1274SJ. Bruce Fields return err; 422055ef1274SJ. Bruce Fields } 422155ef1274SJ. Bruce Fields 422255ef1274SJ. Bruce Fields /* 42231da177e4SLinus Torvalds * LOCKT operation 42241da177e4SLinus Torvalds */ 4225b37ad28bSAl Viro __be32 4226ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4227ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42281da177e4SLinus Torvalds { 42291da177e4SLinus Torvalds struct inode *inode; 42301da177e4SLinus Torvalds struct file_lock file_lock; 4231fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4232fd85b817SMarc Eshel int error; 4233b37ad28bSAl Viro __be32 status; 42341da177e4SLinus Torvalds 4235af558e33SJ. Bruce Fields if (locks_in_grace()) 42361da177e4SLinus Torvalds return nfserr_grace; 42371da177e4SLinus Torvalds 42381da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42391da177e4SLinus Torvalds return nfserr_inval; 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds nfs4_lock_state(); 42421da177e4SLinus Torvalds 42431da177e4SLinus Torvalds status = nfserr_stale_clientid; 424460adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42451da177e4SLinus Torvalds goto out; 42461da177e4SLinus Torvalds 424775c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42481da177e4SLinus Torvalds goto out; 42491da177e4SLinus Torvalds 4250ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42511da177e4SLinus Torvalds locks_init_lock(&file_lock); 42521da177e4SLinus Torvalds switch (lockt->lt_type) { 42531da177e4SLinus Torvalds case NFS4_READ_LT: 42541da177e4SLinus Torvalds case NFS4_READW_LT: 42551da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42561da177e4SLinus Torvalds break; 42571da177e4SLinus Torvalds case NFS4_WRITE_LT: 42581da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42591da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42601da177e4SLinus Torvalds break; 42611da177e4SLinus Torvalds default: 42622fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42631da177e4SLinus Torvalds status = nfserr_inval; 42641da177e4SLinus Torvalds goto out; 42651da177e4SLinus Torvalds } 42661da177e4SLinus Torvalds 4267fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4268fe0750e5SJ. Bruce Fields if (lo) 4269fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42701da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42711da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42721da177e4SLinus Torvalds 42731da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 427487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42751da177e4SLinus Torvalds 42761da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42771da177e4SLinus Torvalds 42781da177e4SLinus Torvalds status = nfs_ok; 427955ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4280fd85b817SMarc Eshel if (error) { 4281fd85b817SMarc Eshel status = nfserrno(error); 4282fd85b817SMarc Eshel goto out; 4283fd85b817SMarc Eshel } 42849d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42851da177e4SLinus Torvalds status = nfserr_denied; 42869d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42871da177e4SLinus Torvalds } 42881da177e4SLinus Torvalds out: 42891da177e4SLinus Torvalds nfs4_unlock_state(); 42901da177e4SLinus Torvalds return status; 42911da177e4SLinus Torvalds } 42921da177e4SLinus Torvalds 4293b37ad28bSAl Viro __be32 4294ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4295a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42961da177e4SLinus Torvalds { 4297dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42981da177e4SLinus Torvalds struct file *filp = NULL; 42991da177e4SLinus Torvalds struct file_lock file_lock; 4300b37ad28bSAl Viro __be32 status; 4301b8dd7b9aSAl Viro int err; 43021da177e4SLinus Torvalds 43031da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43041da177e4SLinus Torvalds (long long) locku->lu_offset, 43051da177e4SLinus Torvalds (long long) locku->lu_length); 43061da177e4SLinus Torvalds 43071da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43081da177e4SLinus Torvalds return nfserr_inval; 43091da177e4SLinus Torvalds 43101da177e4SLinus Torvalds nfs4_lock_state(); 43111da177e4SLinus Torvalds 43129072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43132288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43149072d5c6SJ. Bruce Fields if (status) 43151da177e4SLinus Torvalds goto out; 4316f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4317f9d7562fSJ. Bruce Fields if (!filp) { 4318f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4319f9d7562fSJ. Bruce Fields goto out; 4320f9d7562fSJ. Bruce Fields } 43211da177e4SLinus Torvalds BUG_ON(!filp); 43221da177e4SLinus Torvalds locks_init_lock(&file_lock); 43231da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4324fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43251da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43261da177e4SLinus Torvalds file_lock.fl_file = filp; 43271da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4328d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43291da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43301da177e4SLinus Torvalds 433187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43321da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43331da177e4SLinus Torvalds 43341da177e4SLinus Torvalds /* 43351da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43361da177e4SLinus Torvalds */ 4337fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4338b8dd7b9aSAl Viro if (err) { 4339fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43401da177e4SLinus Torvalds goto out_nfserr; 43411da177e4SLinus Torvalds } 43421da177e4SLinus Torvalds /* 43431da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43441da177e4SLinus Torvalds */ 4345dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4346dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43471da177e4SLinus Torvalds 43481da177e4SLinus Torvalds out: 434971c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43501da177e4SLinus Torvalds nfs4_unlock_state(); 43511da177e4SLinus Torvalds return status; 43521da177e4SLinus Torvalds 43531da177e4SLinus Torvalds out_nfserr: 4354b8dd7b9aSAl Viro status = nfserrno(err); 43551da177e4SLinus Torvalds goto out; 43561da177e4SLinus Torvalds } 43571da177e4SLinus Torvalds 43581da177e4SLinus Torvalds /* 43591da177e4SLinus Torvalds * returns 43601da177e4SLinus Torvalds * 1: locks held by lockowner 43611da177e4SLinus Torvalds * 0: no locks held by lockowner 43621da177e4SLinus Torvalds */ 43631da177e4SLinus Torvalds static int 4364fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43651da177e4SLinus Torvalds { 43661da177e4SLinus Torvalds struct file_lock **flpp; 4367f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43681da177e4SLinus Torvalds int status = 0; 43691da177e4SLinus Torvalds 4370b89f4321SArnd Bergmann lock_flocks(); 43711da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4372796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43731da177e4SLinus Torvalds status = 1; 43741da177e4SLinus Torvalds goto out; 43751da177e4SLinus Torvalds } 4376796dadfdSJ. Bruce Fields } 43771da177e4SLinus Torvalds out: 4378b89f4321SArnd Bergmann unlock_flocks(); 43791da177e4SLinus Torvalds return status; 43801da177e4SLinus Torvalds } 43811da177e4SLinus Torvalds 4382b37ad28bSAl Viro __be32 4383b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4384b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4385b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43861da177e4SLinus Torvalds { 43871da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43883e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4389fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4390dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43911da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43923e9e3dbeSNeilBrown struct list_head matches; 439316bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4394b37ad28bSAl Viro __be32 status; 43951da177e4SLinus Torvalds 43961da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43971da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43981da177e4SLinus Torvalds 43991da177e4SLinus Torvalds /* XXX check for lease expiration */ 44001da177e4SLinus Torvalds 44011da177e4SLinus Torvalds status = nfserr_stale_clientid; 4402849823c5SNeil Brown if (STALE_CLIENTID(clid)) 44031da177e4SLinus Torvalds return status; 44041da177e4SLinus Torvalds 44051da177e4SLinus Torvalds nfs4_lock_state(); 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds status = nfserr_locks_held; 44083e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 440906f1f864SJ. Bruce Fields 441016bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 441116bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 441216bfdaafSJ. Bruce Fields continue; 4413599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44143e9e3dbeSNeilBrown continue; 44153e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4416ea1da636SNeilBrown st_perstateowner) { 4417fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4418fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44191da177e4SLinus Torvalds goto out; 4420fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44211da177e4SLinus Torvalds } 44223e9e3dbeSNeilBrown } 44233e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44243e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44253e9e3dbeSNeilBrown * have been checked. */ 44261da177e4SLinus Torvalds status = nfs_ok; 44270fa822e4SNeilBrown while (!list_empty(&matches)) { 4428fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4429fe0750e5SJ. Bruce Fields lo_list); 44300fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44310fa822e4SNeilBrown * for openowners. */ 4432fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4433fe0750e5SJ. Bruce Fields release_lockowner(lo); 44341da177e4SLinus Torvalds } 44351da177e4SLinus Torvalds out: 44361da177e4SLinus Torvalds nfs4_unlock_state(); 44371da177e4SLinus Torvalds return status; 44381da177e4SLinus Torvalds } 44391da177e4SLinus Torvalds 44401da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4441a55370a3SNeilBrown alloc_reclaim(void) 44421da177e4SLinus Torvalds { 4443a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44441da177e4SLinus Torvalds } 44451da177e4SLinus Torvalds 4446c7b9a459SNeilBrown int 4447a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4448c7b9a459SNeilBrown { 4449c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4450c7b9a459SNeilBrown struct nfs4_client *clp; 4451c7b9a459SNeilBrown 4452e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4453393d8ed8SJ. Bruce Fields if (!clp) 4454393d8ed8SJ. Bruce Fields return 0; 4455a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4456c7b9a459SNeilBrown } 4457c7b9a459SNeilBrown 44581da177e4SLinus Torvalds /* 44591da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44601da177e4SLinus Torvalds */ 4461190e4fbfSNeilBrown int 4462190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44631da177e4SLinus Torvalds { 44641da177e4SLinus Torvalds unsigned int strhashval; 44651da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44661da177e4SLinus Torvalds 4467a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4468a55370a3SNeilBrown crp = alloc_reclaim(); 44691da177e4SLinus Torvalds if (!crp) 44701da177e4SLinus Torvalds return 0; 4471a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44721da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44731da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4474a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44751da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44761da177e4SLinus Torvalds return 1; 44771da177e4SLinus Torvalds } 44781da177e4SLinus Torvalds 44792a4317c5SJeff Layton void 44801da177e4SLinus Torvalds nfs4_release_reclaim(void) 44811da177e4SLinus Torvalds { 44821da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44831da177e4SLinus Torvalds int i; 44841da177e4SLinus Torvalds 44851da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44861da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44871da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44881da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44891da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44901da177e4SLinus Torvalds kfree(crp); 44911da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44921da177e4SLinus Torvalds } 44931da177e4SLinus Torvalds } 44941da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44951da177e4SLinus Torvalds } 44961da177e4SLinus Torvalds 44971da177e4SLinus Torvalds /* 44981da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 44992a4317c5SJeff Layton struct nfs4_client_reclaim * 4500a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 45011da177e4SLinus Torvalds { 45021da177e4SLinus Torvalds unsigned int strhashval; 45031da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45041da177e4SLinus Torvalds 4505a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4506a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4507a55370a3SNeilBrown clp->cl_recdir); 45081da177e4SLinus Torvalds 45091da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4510a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45111da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4512a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45131da177e4SLinus Torvalds return crp; 45141da177e4SLinus Torvalds } 45151da177e4SLinus Torvalds } 45161da177e4SLinus Torvalds return NULL; 45171da177e4SLinus Torvalds } 45181da177e4SLinus Torvalds 45191da177e4SLinus Torvalds /* 45201da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45211da177e4SLinus Torvalds */ 4522b37ad28bSAl Viro __be32 45231da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45241da177e4SLinus Torvalds { 4525a52d726bSJeff Layton struct nfs4_client *clp; 4526a52d726bSJeff Layton 4527a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4528a52d726bSJeff Layton clp = find_confirmed_client(clid); 4529a52d726bSJeff Layton if (clp == NULL) 4530a52d726bSJeff Layton return nfserr_reclaim_bad; 4531a52d726bSJeff Layton 4532a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45331da177e4SLinus Torvalds } 45341da177e4SLinus Torvalds 453565178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 453665178db4SBryan Schumaker 453765178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 453865178db4SBryan Schumaker { 453965178db4SBryan Schumaker struct nfs4_client *clp, *next; 454065178db4SBryan Schumaker int count = 0; 454165178db4SBryan Schumaker 454265178db4SBryan Schumaker nfs4_lock_state(); 454365178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45442a4317c5SJeff Layton nfsd4_client_record_remove(clp); 454565178db4SBryan Schumaker expire_client(clp); 454665178db4SBryan Schumaker if (++count == num) 454765178db4SBryan Schumaker break; 454865178db4SBryan Schumaker } 454965178db4SBryan Schumaker nfs4_unlock_state(); 455065178db4SBryan Schumaker 455165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 455265178db4SBryan Schumaker } 455365178db4SBryan Schumaker 455465178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 455565178db4SBryan Schumaker { 455665178db4SBryan Schumaker release_lockowner(lockowner(sop)); 455765178db4SBryan Schumaker } 455865178db4SBryan Schumaker 455965178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 456065178db4SBryan Schumaker { 456165178db4SBryan Schumaker release_openowner(openowner(sop)); 456265178db4SBryan Schumaker } 456365178db4SBryan Schumaker 4564353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 456565178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 456665178db4SBryan Schumaker { 456765178db4SBryan Schumaker int i, count = 0; 456865178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 456965178db4SBryan Schumaker 457016bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 457116bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 457216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 457316bfdaafSJ. Bruce Fields continue; 457465178db4SBryan Schumaker release_sop(sop); 457565178db4SBryan Schumaker if (++count == num) 457665178db4SBryan Schumaker return count; 457765178db4SBryan Schumaker } 457865178db4SBryan Schumaker } 457965178db4SBryan Schumaker return count; 458065178db4SBryan Schumaker } 458165178db4SBryan Schumaker 458265178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 458365178db4SBryan Schumaker { 458465178db4SBryan Schumaker int count; 458565178db4SBryan Schumaker 458665178db4SBryan Schumaker nfs4_lock_state(); 458716bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 458865178db4SBryan Schumaker nfs4_unlock_state(); 458965178db4SBryan Schumaker 459065178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 459165178db4SBryan Schumaker } 459265178db4SBryan Schumaker 459365178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 459465178db4SBryan Schumaker { 459565178db4SBryan Schumaker int count; 459665178db4SBryan Schumaker 459765178db4SBryan Schumaker nfs4_lock_state(); 459816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 459965178db4SBryan Schumaker nfs4_unlock_state(); 460065178db4SBryan Schumaker 460165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 460265178db4SBryan Schumaker } 460365178db4SBryan Schumaker 460465178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 460565178db4SBryan Schumaker { 460665178db4SBryan Schumaker int i, count = 0; 46072d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46082d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 460965178db4SBryan Schumaker 461065178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46112d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46122d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 461365178db4SBryan Schumaker deleg_func(dp); 461465178db4SBryan Schumaker if (++count == num) 461565178db4SBryan Schumaker return count; 461665178db4SBryan Schumaker } 461765178db4SBryan Schumaker } 461865178db4SBryan Schumaker } 46192d3475c0SBryan Schumaker 462065178db4SBryan Schumaker return count; 462165178db4SBryan Schumaker } 462265178db4SBryan Schumaker 462365178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 462465178db4SBryan Schumaker { 462565178db4SBryan Schumaker unsigned int count; 462665178db4SBryan Schumaker 462765178db4SBryan Schumaker nfs4_lock_state(); 462865178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 462965178db4SBryan Schumaker nfs4_unlock_state(); 463065178db4SBryan Schumaker 463165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 463265178db4SBryan Schumaker } 463365178db4SBryan Schumaker 463465178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 463565178db4SBryan Schumaker { 463665178db4SBryan Schumaker unsigned int count; 463765178db4SBryan Schumaker 463865178db4SBryan Schumaker nfs4_lock_state(); 463965178db4SBryan Schumaker spin_lock(&recall_lock); 464065178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 464165178db4SBryan Schumaker spin_unlock(&recall_lock); 464265178db4SBryan Schumaker nfs4_unlock_state(); 464365178db4SBryan Schumaker 464465178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 464565178db4SBryan Schumaker } 464665178db4SBryan Schumaker 464765178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 464865178db4SBryan Schumaker 4649ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46501da177e4SLinus Torvalds 465172083396SBryan Schumaker void 4652ac4d8ff2SNeilBrown nfs4_state_init(void) 46531da177e4SLinus Torvalds { 465472083396SBryan Schumaker int i; 46551da177e4SLinus Torvalds 46561da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46571da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46581da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46591da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46601da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 466102cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46621da177e4SLinus Torvalds } 46635282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46645282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46651da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46661da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46671da177e4SLinus Torvalds } 466816bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 466916bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46701da177e4SLinus Torvalds } 4671009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4672009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46731da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46741da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46751da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4676ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4677ac4d8ff2SNeilBrown } 4678ac4d8ff2SNeilBrown 4679c2f1a551SMeelap Shah /* 4680c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4681c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4682c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4683c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4684c2f1a551SMeelap Shah * 4685c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4686c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4687c2f1a551SMeelap Shah */ 4688c2f1a551SMeelap Shah static void 4689c2f1a551SMeelap Shah set_max_delegations(void) 4690c2f1a551SMeelap Shah { 4691c2f1a551SMeelap Shah /* 4692c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4693c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4694c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4695c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4696c2f1a551SMeelap Shah */ 4697c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4698c2f1a551SMeelap Shah } 4699c2f1a551SMeelap Shah 4700ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4701ac4d8ff2SNeilBrown 4702a6d6b781SJeff Layton int 4703a6d6b781SJeff Layton nfs4_state_start(void) 4704ac4d8ff2SNeilBrown { 4705b5a1a81eSJ. Bruce Fields int ret; 4706b5a1a81eSJ. Bruce Fields 47072a4317c5SJeff Layton /* 47082a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47092a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47102a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47112a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47122a4317c5SJeff Layton * basis. 47132a4317c5SJeff Layton */ 47142a4317c5SJeff Layton get_net(&init_net); 47152a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 47161da177e4SLinus Torvalds boot_time = get_seconds(); 4717af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 471833dcc481SJeff Layton grace_ended = false; 47199a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4720e46b498cSJ. Bruce Fields nfsd4_grace); 4721b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4722a6d6b781SJeff Layton if (ret) { 4723a6d6b781SJeff Layton ret = -ENOMEM; 4724a6d6b781SJeff Layton goto out_recovery; 4725a6d6b781SJeff Layton } 472658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4727a6d6b781SJeff Layton if (laundry_wq == NULL) { 4728a6d6b781SJeff Layton ret = -ENOMEM; 4729a6d6b781SJeff Layton goto out_recovery; 4730a6d6b781SJeff Layton } 4731b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4732b5a1a81eSJ. Bruce Fields if (ret) 4733b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4734e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4735c2f1a551SMeelap Shah set_max_delegations(); 4736b5a1a81eSJ. Bruce Fields return 0; 4737b5a1a81eSJ. Bruce Fields out_free_laundry: 4738b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4739a6d6b781SJeff Layton out_recovery: 47402a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47412a4317c5SJeff Layton put_net(&init_net); 4742b5a1a81eSJ. Bruce Fields return ret; 47431da177e4SLinus Torvalds } 47441da177e4SLinus Torvalds 47451da177e4SLinus Torvalds static void 47461da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47471da177e4SLinus Torvalds { 47481da177e4SLinus Torvalds int i; 47491da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47501da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47511da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47521da177e4SLinus Torvalds 47531da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47541da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47551da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47561da177e4SLinus Torvalds expire_client(clp); 47571da177e4SLinus Torvalds } 47581da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47591da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47601da177e4SLinus Torvalds expire_client(clp); 47611da177e4SLinus Torvalds } 47621da177e4SLinus Torvalds } 47631da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47641da177e4SLinus Torvalds spin_lock(&recall_lock); 47651da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47661da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47671da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47681da177e4SLinus Torvalds } 47691da177e4SLinus Torvalds spin_unlock(&recall_lock); 47701da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47711da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47721da177e4SLinus Torvalds unhash_delegation(dp); 47731da177e4SLinus Torvalds } 47741da177e4SLinus Torvalds 47752a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47762a4317c5SJeff Layton put_net(&init_net); 47771da177e4SLinus Torvalds } 47781da177e4SLinus Torvalds 47791da177e4SLinus Torvalds void 47801da177e4SLinus Torvalds nfs4_state_shutdown(void) 47811da177e4SLinus Torvalds { 4782afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47835e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47842c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 47851da177e4SLinus Torvalds nfs4_lock_state(); 47861da177e4SLinus Torvalds __nfs4_state_shutdown(); 47871da177e4SLinus Torvalds nfs4_unlock_state(); 4788c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47891da177e4SLinus Torvalds } 47908b70484cSTigran Mkrtchyan 47918b70484cSTigran Mkrtchyan static void 47928b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47938b70484cSTigran Mkrtchyan { 479437c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 479537c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47968b70484cSTigran Mkrtchyan } 47978b70484cSTigran Mkrtchyan 47988b70484cSTigran Mkrtchyan static void 47998b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48008b70484cSTigran Mkrtchyan { 480137c593c5STigran Mkrtchyan if (cstate->minorversion) { 480237c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 480337c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 480437c593c5STigran Mkrtchyan } 480537c593c5STigran Mkrtchyan } 480637c593c5STigran Mkrtchyan 480737c593c5STigran Mkrtchyan void 480837c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 480937c593c5STigran Mkrtchyan { 481037c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48118b70484cSTigran Mkrtchyan } 48128b70484cSTigran Mkrtchyan 481362cd4a59STigran Mkrtchyan /* 481462cd4a59STigran Mkrtchyan * functions to set current state id 481562cd4a59STigran Mkrtchyan */ 48168b70484cSTigran Mkrtchyan void 48179428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48189428fe1aSTigran Mkrtchyan { 48199428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48209428fe1aSTigran Mkrtchyan } 48219428fe1aSTigran Mkrtchyan 48229428fe1aSTigran Mkrtchyan void 48238b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48248b70484cSTigran Mkrtchyan { 48258b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48268b70484cSTigran Mkrtchyan } 48278b70484cSTigran Mkrtchyan 48288b70484cSTigran Mkrtchyan void 482962cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 483062cd4a59STigran Mkrtchyan { 483162cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 483262cd4a59STigran Mkrtchyan } 483362cd4a59STigran Mkrtchyan 483462cd4a59STigran Mkrtchyan void 483562cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 483662cd4a59STigran Mkrtchyan { 483762cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 483862cd4a59STigran Mkrtchyan } 483962cd4a59STigran Mkrtchyan 484062cd4a59STigran Mkrtchyan /* 484162cd4a59STigran Mkrtchyan * functions to consume current state id 484262cd4a59STigran Mkrtchyan */ 48431e97b519STigran Mkrtchyan 48441e97b519STigran Mkrtchyan void 48459428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48469428fe1aSTigran Mkrtchyan { 48479428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48489428fe1aSTigran Mkrtchyan } 48499428fe1aSTigran Mkrtchyan 48509428fe1aSTigran Mkrtchyan void 48519428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48529428fe1aSTigran Mkrtchyan { 48539428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48549428fe1aSTigran Mkrtchyan } 48559428fe1aSTigran Mkrtchyan 48569428fe1aSTigran Mkrtchyan void 48571e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48581e97b519STigran Mkrtchyan { 48591e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48601e97b519STigran Mkrtchyan } 48611e97b519STigran Mkrtchyan 48621e97b519STigran Mkrtchyan void 48631e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48641e97b519STigran Mkrtchyan { 48651e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48661e97b519STigran Mkrtchyan } 48671e97b519STigran Mkrtchyan 486862cd4a59STigran Mkrtchyan void 48698b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48708b70484cSTigran Mkrtchyan { 48718b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48728b70484cSTigran Mkrtchyan } 48738b70484cSTigran Mkrtchyan 48748b70484cSTigran Mkrtchyan void 487562cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48768b70484cSTigran Mkrtchyan { 487762cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48788b70484cSTigran Mkrtchyan } 487930813e27STigran Mkrtchyan 488030813e27STigran Mkrtchyan void 488130813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 488230813e27STigran Mkrtchyan { 488330813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 488430813e27STigran Mkrtchyan } 488530813e27STigran Mkrtchyan 488630813e27STigran Mkrtchyan void 488730813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 488830813e27STigran Mkrtchyan { 488930813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 489030813e27STigran Mkrtchyan } 4891