11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 45bfa4b365SJ. Bruce Fields #include "current_stateid.h" 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* Globals */ 50cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 51efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 52fd39ca9aSNeilBrown static time_t boot_time; 53f32f3c2dSJ. Bruce Fields 54f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 55f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 56f32f3c2dSJ. Bruce Fields .si_generation = ~0, 57f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 58f32f3c2dSJ. Bruce Fields }; 59f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 60f32f3c2dSJ. Bruce Fields /* all fields zero */ 61f32f3c2dSJ. Bruce Fields }; 6219ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6319ff0f28STigran Mkrtchyan .si_generation = 1, 6419ff0f28STigran Mkrtchyan }; 65f32f3c2dSJ. Bruce Fields 66ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 67fd39ca9aSNeilBrown 68f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 69f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7019ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* forward declarations */ 73fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 741da177e4SLinus Torvalds 758b671b80SJ. Bruce Fields /* Locking: */ 768b671b80SJ. Bruce Fields 778b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 78353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 791da177e4SLinus Torvalds 808b671b80SJ. Bruce Fields /* 818b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 828b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 838b671b80SJ. Bruce Fields * eventually cover more: 848b671b80SJ. Bruce Fields */ 858b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 868b671b80SJ. Bruce Fields 87fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 88fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 89e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 92e60d4398SNeilBrown 931da177e4SLinus Torvalds void 941da177e4SLinus Torvalds nfs4_lock_state(void) 951da177e4SLinus Torvalds { 96353ab6e9SIngo Molnar mutex_lock(&client_mutex); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 99508dc6e1SBenny Halevy static void free_session(struct kref *); 100508dc6e1SBenny Halevy 101508dc6e1SBenny Halevy /* Must be called under the client_lock */ 102508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 103508dc6e1SBenny Halevy { 104508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 105508dc6e1SBenny Halevy } 106508dc6e1SBenny Halevy 107508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 108508dc6e1SBenny Halevy { 109508dc6e1SBenny Halevy kref_get(&ses->se_ref); 110508dc6e1SBenny Halevy } 111508dc6e1SBenny Halevy 1121da177e4SLinus Torvalds void 1131da177e4SLinus Torvalds nfs4_unlock_state(void) 1141da177e4SLinus Torvalds { 115353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static inline u32 1191da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds u32 x = 0; 1241da177e4SLinus Torvalds while (nbytes--) { 1251da177e4SLinus Torvalds x *= 37; 1261da177e4SLinus Torvalds x += *cptr++; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds return x; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static struct list_head del_recall_lru; 1321da177e4SLinus Torvalds 13332513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13432513b40SJ. Bruce Fields { 13532513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13632513b40SJ. Bruce Fields } 13732513b40SJ. Bruce Fields 13813cd2184SNeilBrown static inline void 13913cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14013cd2184SNeilBrown { 1418b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1428b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1438b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1448b671b80SJ. Bruce Fields iput(fi->fi_inode); 14532513b40SJ. Bruce Fields nfsd4_free_file(fi); 1468b671b80SJ. Bruce Fields } 14713cd2184SNeilBrown } 14813cd2184SNeilBrown 14913cd2184SNeilBrown static inline void 15013cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15113cd2184SNeilBrown { 1528b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15313cd2184SNeilBrown } 15413cd2184SNeilBrown 155ef0f3390SNeilBrown static int num_delegations; 156c2f1a551SMeelap Shah unsigned int max_delegations; 157ef0f3390SNeilBrown 158ef0f3390SNeilBrown /* 159ef0f3390SNeilBrown * Open owner state (share locks) 160ef0f3390SNeilBrown */ 161ef0f3390SNeilBrown 16216bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16316bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16416bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16516bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 166ef0f3390SNeilBrown 16716bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 168ddc04c41SJ. Bruce Fields { 169ddc04c41SJ. Bruce Fields unsigned int ret; 170ddc04c41SJ. Bruce Fields 171ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 172ddc04c41SJ. Bruce Fields ret += clientid; 17316bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 174ddc04c41SJ. Bruce Fields } 175ef0f3390SNeilBrown 17616bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 177ef0f3390SNeilBrown 178ef0f3390SNeilBrown /* hash table for nfs4_file */ 179ef0f3390SNeilBrown #define FILE_HASH_BITS 8 180ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18135079582SShan Wei 182ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 183ddc04c41SJ. Bruce Fields { 184ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 185ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 186ddc04c41SJ. Bruce Fields } 187ddc04c41SJ. Bruce Fields 188ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 189ef0f3390SNeilBrown 190998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 191f9d7562fSJ. Bruce Fields { 192f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 193f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 194f9d7562fSJ. Bruce Fields } 195f9d7562fSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 197998db52cSJ. Bruce Fields { 198998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 199998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 200998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 201998db52cSJ. Bruce Fields } else 202998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 203998db52cSJ. Bruce Fields } 204998db52cSJ. Bruce Fields 205998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 206f9d7562fSJ. Bruce Fields { 207f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 208f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 209f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields 213998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 214f9d7562fSJ. Bruce Fields { 215f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 216f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2173d02fa29SJ. Bruce Fields /* 2183d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2193d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2203d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2213d02fa29SJ. Bruce Fields */ 2223d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2233d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2243d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 225f9d7562fSJ. Bruce Fields } 226f9d7562fSJ. Bruce Fields } 227f9d7562fSJ. Bruce Fields 228998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 229998db52cSJ. Bruce Fields { 230998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 231998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 232998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 233998db52cSJ. Bruce Fields } else 234998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 235998db52cSJ. Bruce Fields } 236998db52cSJ. Bruce Fields 2376136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23836d44c60SJ. Bruce Fields { 2396136d2b4SJ. Bruce Fields static int min_stateid = 0; 24038c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2416136d2b4SJ. Bruce Fields int new_stid; 2426136d2b4SJ. Bruce Fields int error; 24336d44c60SJ. Bruce Fields 24438c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2456136d2b4SJ. Bruce Fields /* 246996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 247996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 248996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 249996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2506136d2b4SJ. Bruce Fields */ 2516136d2b4SJ. Bruce Fields BUG_ON(error); 2526136d2b4SJ. Bruce Fields /* 2536136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2546136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2556136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2566136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2576136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2586136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2596136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2606136d2b4SJ. Bruce Fields */ 2616136d2b4SJ. Bruce Fields 2626136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2636136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2646136d2b4SJ. Bruce Fields min_stateid = 0; 2656136d2b4SJ. Bruce Fields return new_stid; 26636d44c60SJ. Bruce Fields } 26736d44c60SJ. Bruce Fields 268996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2692a74aba7SJ. Bruce Fields { 2702a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2716136d2b4SJ. Bruce Fields int new_id; 2722a74aba7SJ. Bruce Fields 2732a74aba7SJ. Bruce Fields stid->sc_type = type; 2742a74aba7SJ. Bruce Fields stid->sc_client = cl; 2752a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2766136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2776136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2782a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2792a74aba7SJ. Bruce Fields s->si_generation = 0; 280996e0938SJ. Bruce Fields } 281996e0938SJ. Bruce Fields 282996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 283996e0938SJ. Bruce Fields { 284996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 285996e0938SJ. Bruce Fields 286996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 287996e0938SJ. Bruce Fields return NULL; 288996e0938SJ. Bruce Fields /* 289996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 290996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 291996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 292996e0938SJ. Bruce Fields * preallocated entries. 293996e0938SJ. Bruce Fields */ 294996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2952a74aba7SJ. Bruce Fields } 2962a74aba7SJ. Bruce Fields 2974cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2984cdc951bSJ. Bruce Fields { 2994cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3004cdc951bSJ. Bruce Fields } 3014cdc951bSJ. Bruce Fields 3021da177e4SLinus Torvalds static struct nfs4_delegation * 303dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds struct nfs4_delegation *dp; 3061da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 309c3e48080SJ. Bruce Fields /* 310c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 311c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 312c3e48080SJ. Bruce Fields * write delegations properly. 313c3e48080SJ. Bruce Fields */ 314c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 315c3e48080SJ. Bruce Fields return NULL; 31647f9940cSMeelap Shah if (fp->fi_had_conflict) 31747f9940cSMeelap Shah return NULL; 318c2f1a551SMeelap Shah if (num_delegations > max_delegations) 319ef0f3390SNeilBrown return NULL; 320996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3215b2d21c1SNeilBrown if (dp == NULL) 3221da177e4SLinus Torvalds return dp; 323996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3242a74aba7SJ. Bruce Fields /* 3252a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3266136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3276136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3282a74aba7SJ. Bruce Fields */ 3292a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 330ef0f3390SNeilBrown num_delegations++; 331ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 332ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3331da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33413cd2184SNeilBrown get_nfs4_file(fp); 3351da177e4SLinus Torvalds dp->dl_file = fp; 3361da177e4SLinus Torvalds dp->dl_type = type; 3376c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3381da177e4SLinus Torvalds dp->dl_time = 0; 3391da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 340b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3411da177e4SLinus Torvalds return dp; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds void 3451da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3481da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 34913cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3505b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 351ef0f3390SNeilBrown num_delegations--; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 355acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3561da177e4SLinus Torvalds { 357acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 358acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 359acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3604ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 361acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 362acfdf5c3SJ. Bruce Fields } 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3656136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3666136d2b4SJ. Bruce Fields { 36738c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36838c2f4b1SJ. Bruce Fields 36938c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3706136d2b4SJ. Bruce Fields } 3716136d2b4SJ. Bruce Fields 3721da177e4SLinus Torvalds /* Called under the state lock. */ 3731da177e4SLinus Torvalds static void 3741da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3751da177e4SLinus Torvalds { 3766136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 377ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3781da177e4SLinus Torvalds spin_lock(&recall_lock); 3795d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3801da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3811da177e4SLinus Torvalds spin_unlock(&recall_lock); 382acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3831da177e4SLinus Torvalds nfs4_put_delegation(dp); 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds /* 3871da177e4SLinus Torvalds * SETCLIENTID state 3881da177e4SLinus Torvalds */ 3891da177e4SLinus Torvalds 39036acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3919089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3929089f1b4SBenny Halevy 3931da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3941da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3951da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3961da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3971da177e4SLinus Torvalds 398ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 399ddc04c41SJ. Bruce Fields { 400ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 401ddc04c41SJ. Bruce Fields } 402ddc04c41SJ. Bruce Fields 403ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 404ddc04c41SJ. Bruce Fields { 405ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 406ddc04c41SJ. Bruce Fields } 407ddc04c41SJ. Bruce Fields 4081da177e4SLinus Torvalds /* 4091da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4101da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4111da177e4SLinus Torvalds * 4121da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4131da177e4SLinus Torvalds * setclientid_confirmed info. 4141da177e4SLinus Torvalds * 4151da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4161da177e4SLinus Torvalds * setclientid info. 4171da177e4SLinus Torvalds * 4181da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4191da177e4SLinus Torvalds * for lease renewal. 4201da177e4SLinus Torvalds * 4211da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4221da177e4SLinus Torvalds * for last close replay. 4231da177e4SLinus Torvalds */ 4241da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4251da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4261da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4271da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4291da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head client_lru; 4311da177e4SLinus Torvalds static struct list_head close_lru; 4321da177e4SLinus Torvalds 433f9d7562fSJ. Bruce Fields /* 434f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 435f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 436f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 437f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 438f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 439f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 440f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 441f9d7562fSJ. Bruce Fields * 442f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 443f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 444f9d7562fSJ. Bruce Fields * 445f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 446f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 447f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 448f9d7562fSJ. Bruce Fields * 449f9d7562fSJ. Bruce Fields * which we should reject. 450f9d7562fSJ. Bruce Fields */ 4515ae037e5SJeff Layton static unsigned int 4525ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 453f9d7562fSJ. Bruce Fields int i; 4545ae037e5SJeff Layton unsigned int access = 0; 455f9d7562fSJ. Bruce Fields 456f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 457f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4585ae037e5SJeff Layton access |= i; 459f9d7562fSJ. Bruce Fields } 4605ae037e5SJeff Layton return access; 461f9d7562fSJ. Bruce Fields } 462f9d7562fSJ. Bruce Fields 4633a328614SJeff Layton static bool 464dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 465f9d7562fSJ. Bruce Fields unsigned int access, deny; 466f9d7562fSJ. Bruce Fields 4675ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4685ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 469f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4703a328614SJeff Layton return false; 4713a328614SJeff Layton return true; 472f9d7562fSJ. Bruce Fields } 473f9d7562fSJ. Bruce Fields 47482c5ff1bSJeff Layton /* set share access for a given stateid */ 47582c5ff1bSJeff Layton static inline void 47682c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 47782c5ff1bSJeff Layton { 47882c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 47982c5ff1bSJeff Layton } 48082c5ff1bSJeff Layton 48182c5ff1bSJeff Layton /* clear share access for a given stateid */ 48282c5ff1bSJeff Layton static inline void 48382c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48482c5ff1bSJeff Layton { 48582c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48682c5ff1bSJeff Layton } 48782c5ff1bSJeff Layton 48882c5ff1bSJeff Layton /* test whether a given stateid has access */ 48982c5ff1bSJeff Layton static inline bool 49082c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49182c5ff1bSJeff Layton { 49282c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49382c5ff1bSJeff Layton } 49482c5ff1bSJeff Layton 495ce0fc43cSJeff Layton /* set share deny for a given stateid */ 496ce0fc43cSJeff Layton static inline void 497ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 498ce0fc43cSJeff Layton { 499ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 500ce0fc43cSJeff Layton } 501ce0fc43cSJeff Layton 502ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 503ce0fc43cSJeff Layton static inline void 504ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 505ce0fc43cSJeff Layton { 506ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 507ce0fc43cSJeff Layton } 508ce0fc43cSJeff Layton 509ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 510ce0fc43cSJeff Layton static inline bool 511ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 512ce0fc43cSJeff Layton { 513ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 514ce0fc43cSJeff Layton } 515ce0fc43cSJeff Layton 516f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 517f9d7562fSJ. Bruce Fields { 5188f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 519f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 520f9d7562fSJ. Bruce Fields return O_RDONLY; 521f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 522f9d7562fSJ. Bruce Fields return O_WRONLY; 523f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 524f9d7562fSJ. Bruce Fields return O_RDWR; 525f9d7562fSJ. Bruce Fields } 526f9d7562fSJ. Bruce Fields BUG(); 527f9d7562fSJ. Bruce Fields } 528f9d7562fSJ. Bruce Fields 52982c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53082c5ff1bSJeff Layton static void 53182c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53282c5ff1bSJeff Layton { 53382c5ff1bSJeff Layton int i; 53482c5ff1bSJeff Layton 53582c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53682c5ff1bSJeff Layton if (test_access(i, stp)) 53782c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 53882c5ff1bSJeff Layton nfs4_access_to_omode(i)); 53982c5ff1bSJeff Layton clear_access(i, stp); 54082c5ff1bSJeff Layton } 54182c5ff1bSJeff Layton } 54282c5ff1bSJeff Layton 543dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 544529d7b2aSJ. Bruce Fields { 545529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 546529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 547529d7b2aSJ. Bruce Fields } 548529d7b2aSJ. Bruce Fields 549dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 550529d7b2aSJ. Bruce Fields { 55182c5ff1bSJeff Layton release_all_access(stp); 552a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5534665e2baSJ. Bruce Fields stp->st_file = NULL; 5544665e2baSJ. Bruce Fields } 5554665e2baSJ. Bruce Fields 556dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5574665e2baSJ. Bruce Fields { 558529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 559529d7b2aSJ. Bruce Fields } 560529d7b2aSJ. Bruce Fields 561dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 562529d7b2aSJ. Bruce Fields { 563529d7b2aSJ. Bruce Fields struct file *file; 564529d7b2aSJ. Bruce Fields 565529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5666136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 567529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 568529d7b2aSJ. Bruce Fields if (file) 569fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57038c387b5SJ. Bruce Fields close_generic_stateid(stp); 571529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 572529d7b2aSJ. Bruce Fields } 573529d7b2aSJ. Bruce Fields 574fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 575529d7b2aSJ. Bruce Fields { 576dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 577529d7b2aSJ. Bruce Fields 578fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 579fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 580009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 581fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 582fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 583dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 584529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 585529d7b2aSJ. Bruce Fields } 586529d7b2aSJ. Bruce Fields } 587529d7b2aSJ. Bruce Fields 588fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 589529d7b2aSJ. Bruce Fields { 590fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 591fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 592529d7b2aSJ. Bruce Fields } 593529d7b2aSJ. Bruce Fields 594529d7b2aSJ. Bruce Fields static void 595dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 596529d7b2aSJ. Bruce Fields { 597fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 598529d7b2aSJ. Bruce Fields 599529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 600fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 601fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 602fe0750e5SJ. Bruce Fields release_lockowner(lo); 603529d7b2aSJ. Bruce Fields } 604529d7b2aSJ. Bruce Fields } 605529d7b2aSJ. Bruce Fields 60638c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6072283963fSJ. Bruce Fields { 6082283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6092283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61038c387b5SJ. Bruce Fields close_generic_stateid(stp); 61138c387b5SJ. Bruce Fields } 61238c387b5SJ. Bruce Fields 61338c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61438c387b5SJ. Bruce Fields { 61538c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6166136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6172283963fSJ. Bruce Fields free_generic_stateid(stp); 6182283963fSJ. Bruce Fields } 6192283963fSJ. Bruce Fields 620fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 621f1d110caSJ. Bruce Fields { 622dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 623f1d110caSJ. Bruce Fields 624fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 625fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 626fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 627fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 628dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 629f1d110caSJ. Bruce Fields release_open_stateid(stp); 630f1d110caSJ. Bruce Fields } 631f1d110caSJ. Bruce Fields } 632f1d110caSJ. Bruce Fields 633f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 634f7a4d872SJ. Bruce Fields { 635f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 636f7a4d872SJ. Bruce Fields 637f7a4d872SJ. Bruce Fields if (s) { 6386136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 639f7a4d872SJ. Bruce Fields free_generic_stateid(s); 640f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 641f7a4d872SJ. Bruce Fields } 642f7a4d872SJ. Bruce Fields } 643f7a4d872SJ. Bruce Fields 644fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 645f1d110caSJ. Bruce Fields { 646fe0750e5SJ. Bruce Fields unhash_openowner(oo); 647fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 648f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 649fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 650f1d110caSJ. Bruce Fields } 651f1d110caSJ. Bruce Fields 6525282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6535282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6545282fd72SMarc Eshel 6555282fd72SMarc Eshel static inline int 6565282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6575282fd72SMarc Eshel { 6585282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6595282fd72SMarc Eshel 6605282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6615282fd72SMarc Eshel } 6625282fd72SMarc Eshel 6638f199b82STrond Myklebust #ifdef NFSD_DEBUG 6645282fd72SMarc Eshel static inline void 6655282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6665282fd72SMarc Eshel { 6675282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6685282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6695282fd72SMarc Eshel } 6708f199b82STrond Myklebust #else 6718f199b82STrond Myklebust static inline void 6728f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6738f199b82STrond Myklebust { 6748f199b82STrond Myklebust } 6758f199b82STrond Myklebust #endif 6768f199b82STrond Myklebust 6775282fd72SMarc Eshel 678ec6b5d7bSAndy Adamson static void 679ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 680ec6b5d7bSAndy Adamson { 681ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 682ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 683ec6b5d7bSAndy Adamson 684ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 685ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 686ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 687ec6b5d7bSAndy Adamson sid->reserved = 0; 688ec6b5d7bSAndy Adamson } 689ec6b5d7bSAndy Adamson 690ec6b5d7bSAndy Adamson /* 691a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 692a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 693a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 694a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 695a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 696a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 697a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 698a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 699a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 700a649637cSAndy Adamson * for the SEQUENCE op response: 701ec6b5d7bSAndy Adamson */ 702a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 703a649637cSAndy Adamson 704557ce264SAndy Adamson static void 705557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 706557ce264SAndy Adamson { 707557ce264SAndy Adamson int i; 708557ce264SAndy Adamson 709557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 710557ce264SAndy Adamson kfree(ses->se_slots[i]); 711557ce264SAndy Adamson } 712557ce264SAndy Adamson 713efe0cb6dSJ. Bruce Fields /* 714efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 715efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 716efe0cb6dSJ. Bruce Fields */ 717efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 718efe0cb6dSJ. Bruce Fields { 719efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 720efe0cb6dSJ. Bruce Fields } 721efe0cb6dSJ. Bruce Fields 7225b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 723ec6b5d7bSAndy Adamson { 7245b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7255b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 726ec6b5d7bSAndy Adamson 7275b6feee9SJ. Bruce Fields return size; 728557ce264SAndy Adamson } 729557ce264SAndy Adamson 7305b6feee9SJ. Bruce Fields /* 7315b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7325b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73342b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7345b6feee9SJ. Bruce Fields */ 7355b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7365b6feee9SJ. Bruce Fields { 7375b6feee9SJ. Bruce Fields int avail; 7385b6feee9SJ. Bruce Fields 7395b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7405b6feee9SJ. Bruce Fields 7415b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7425b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7435b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7445b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7455b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7465b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7475b6feee9SJ. Bruce Fields 7485b6feee9SJ. Bruce Fields return num; 7495b6feee9SJ. Bruce Fields } 7505b6feee9SJ. Bruce Fields 7515b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7525b6feee9SJ. Bruce Fields { 7535b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7545b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7555b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7565b6feee9SJ. Bruce Fields } 7575b6feee9SJ. Bruce Fields 7585b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7595b6feee9SJ. Bruce Fields { 7605b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7615b6feee9SJ. Bruce Fields int mem, i; 762ec6b5d7bSAndy Adamson 763c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 764ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7655b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 766ec6b5d7bSAndy Adamson 7675b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7686c18ba9fSAlexandros Batsakis if (!new) 7695b6feee9SJ. Bruce Fields return NULL; 770ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7715b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7725b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7735b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7745b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 775ec6b5d7bSAndy Adamson goto out_free; 776ec6b5d7bSAndy Adamson } 7775b6feee9SJ. Bruce Fields return new; 7785b6feee9SJ. Bruce Fields out_free: 7795b6feee9SJ. Bruce Fields while (i--) 7805b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7815b6feee9SJ. Bruce Fields kfree(new); 7825b6feee9SJ. Bruce Fields return NULL; 7835b6feee9SJ. Bruce Fields } 7845b6feee9SJ. Bruce Fields 7855b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7865b6feee9SJ. Bruce Fields { 7875b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7885b6feee9SJ. Bruce Fields 7895b6feee9SJ. Bruce Fields new->maxreqs = numslots; 790d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 791d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7925b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7935b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7945b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7955b6feee9SJ. Bruce Fields } 7965b6feee9SJ. Bruce Fields 79719cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 79819cf5c02SJ. Bruce Fields { 79919cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80019cf5c02SJ. Bruce Fields kfree(c); 80119cf5c02SJ. Bruce Fields } 80219cf5c02SJ. Bruce Fields 80319cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80419cf5c02SJ. Bruce Fields { 80519cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80619cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 80719cf5c02SJ. Bruce Fields 80819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 80919cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81019cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81119cf5c02SJ. Bruce Fields free_conn(c); 81219cf5c02SJ. Bruce Fields } 81319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 814eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81519cf5c02SJ. Bruce Fields } 81619cf5c02SJ. Bruce Fields 817d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 818c7662518SJ. Bruce Fields { 819c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 820c7662518SJ. Bruce Fields 821c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 822c7662518SJ. Bruce Fields if (!conn) 823db90681dSJ. Bruce Fields return NULL; 824c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 825c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 826d29c374cSJ. Bruce Fields conn->cn_flags = flags; 827db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 828db90681dSJ. Bruce Fields return conn; 829db90681dSJ. Bruce Fields } 830db90681dSJ. Bruce Fields 831328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 832328ead28SJ. Bruce Fields { 833328ead28SJ. Bruce Fields conn->cn_session = ses; 834328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 835328ead28SJ. Bruce Fields } 836328ead28SJ. Bruce Fields 837db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 838db90681dSJ. Bruce Fields { 839db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 840c7662518SJ. Bruce Fields 841c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 842328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 843c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 844db90681dSJ. Bruce Fields } 845c7662518SJ. Bruce Fields 84621b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 847db90681dSJ. Bruce Fields { 84819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 84921b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 850db90681dSJ. Bruce Fields } 851db90681dSJ. Bruce Fields 8521d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 853db90681dSJ. Bruce Fields { 854db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85521b75b01SJ. Bruce Fields int ret; 856db90681dSJ. Bruce Fields 8571d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 858db90681dSJ. Bruce Fields if (!conn) 859db90681dSJ. Bruce Fields return nfserr_jukebox; 860db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86121b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86221b75b01SJ. Bruce Fields if (ret) 86321b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86421b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 865c7662518SJ. Bruce Fields return nfs_ok; 866c7662518SJ. Bruce Fields } 867c7662518SJ. Bruce Fields 8681d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8691d1bc8f2SJ. Bruce Fields { 8701d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8711d1bc8f2SJ. Bruce Fields 8721d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8731d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8741d1bc8f2SJ. Bruce Fields 8751d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8761d1bc8f2SJ. Bruce Fields } 8771d1bc8f2SJ. Bruce Fields 8781d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 87919cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 880c7662518SJ. Bruce Fields { 88119cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 88219cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 88319cf5c02SJ. Bruce Fields 88419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 88519cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 88619cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 88719cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 88819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 88919cf5c02SJ. Bruce Fields 89019cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89119cf5c02SJ. Bruce Fields free_conn(c); 89219cf5c02SJ. Bruce Fields 89319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89419cf5c02SJ. Bruce Fields } 89519cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 896c7662518SJ. Bruce Fields } 897c7662518SJ. Bruce Fields 898508dc6e1SBenny Halevy static void free_session(struct kref *kref) 899c7662518SJ. Bruce Fields { 900c7662518SJ. Bruce Fields struct nfsd4_session *ses; 901c7662518SJ. Bruce Fields int mem; 902c7662518SJ. Bruce Fields 903508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 904c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 90519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 906c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 907c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 908c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 909c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 910c7662518SJ. Bruce Fields free_session_slots(ses); 911c7662518SJ. Bruce Fields kfree(ses); 912c7662518SJ. Bruce Fields } 913c7662518SJ. Bruce Fields 914508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 915508dc6e1SBenny Halevy { 916508dc6e1SBenny Halevy spin_lock(&client_lock); 917508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 918508dc6e1SBenny Halevy spin_unlock(&client_lock); 919508dc6e1SBenny Halevy } 920508dc6e1SBenny Halevy 921ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9225b6feee9SJ. Bruce Fields { 9235b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9245b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9255b6feee9SJ. Bruce Fields int numslots, slotsize; 92657b7b43bSJ. Bruce Fields __be32 status; 9275b6feee9SJ. Bruce Fields int idx; 9285b6feee9SJ. Bruce Fields 9295b6feee9SJ. Bruce Fields /* 9305b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9315b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9325b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9335b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9345b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9355b6feee9SJ. Bruce Fields */ 9365b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9375b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 938ced6dfe9SMi Jinlong if (numslots < 1) 939ced6dfe9SMi Jinlong return NULL; 9405b6feee9SJ. Bruce Fields 9415b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9425b6feee9SJ. Bruce Fields if (!new) { 9435b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 944ac7c46f2SJ. Bruce Fields return NULL; 9455b6feee9SJ. Bruce Fields } 9465b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 947ec6b5d7bSAndy Adamson 948ec6b5d7bSAndy Adamson new->se_client = clp; 949ec6b5d7bSAndy Adamson gen_sessionid(new); 950ec6b5d7bSAndy Adamson 951c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 952c7662518SJ. Bruce Fields 953ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 954ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9558b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 956ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9575b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9589089f1b4SBenny Halevy spin_lock(&client_lock); 959ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9604c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 961ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9624c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9639089f1b4SBenny Halevy spin_unlock(&client_lock); 964ec6b5d7bSAndy Adamson 9651d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 966ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 967c7662518SJ. Bruce Fields if (status) { 968508dc6e1SBenny Halevy spin_lock(&client_lock); 969c7662518SJ. Bruce Fields free_session(&new->se_ref); 970508dc6e1SBenny Halevy spin_unlock(&client_lock); 971ac7c46f2SJ. Bruce Fields return NULL; 972c7662518SJ. Bruce Fields } 973dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 974edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 975dcbeaa68SJ. Bruce Fields /* 976dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 977dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 978dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 979dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 980dcbeaa68SJ. Bruce Fields * future: 981dcbeaa68SJ. Bruce Fields */ 982edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 983edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 984edd76786SJ. Bruce Fields } 985dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 986ac7c46f2SJ. Bruce Fields return new; 987ec6b5d7bSAndy Adamson } 988ec6b5d7bSAndy Adamson 9899089f1b4SBenny Halevy /* caller must hold client_lock */ 9905282fd72SMarc Eshel static struct nfsd4_session * 9915282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9925282fd72SMarc Eshel { 9935282fd72SMarc Eshel struct nfsd4_session *elem; 9945282fd72SMarc Eshel int idx; 9955282fd72SMarc Eshel 9965282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9975282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9985282fd72SMarc Eshel /* Search in the appropriate list */ 9995282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10005282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10015282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10025282fd72SMarc Eshel return elem; 10035282fd72SMarc Eshel } 10045282fd72SMarc Eshel } 10055282fd72SMarc Eshel 10065282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10075282fd72SMarc Eshel return NULL; 10085282fd72SMarc Eshel } 10095282fd72SMarc Eshel 10109089f1b4SBenny Halevy /* caller must hold client_lock */ 10117116ed6bSAndy Adamson static void 10125282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10137116ed6bSAndy Adamson { 10147116ed6bSAndy Adamson list_del(&ses->se_hash); 10154c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10167116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10174c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10185282fd72SMarc Eshel } 10195282fd72SMarc Eshel 102036acb66bSBenny Halevy /* must be called under the client_lock */ 10211da177e4SLinus Torvalds static inline void 102236acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10231da177e4SLinus Torvalds { 102407cd4909SBenny Halevy if (is_client_expired(clp)) { 102507cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 102607cd4909SBenny Halevy __func__, 102707cd4909SBenny Halevy clp->cl_clientid.cl_boot, 102807cd4909SBenny Halevy clp->cl_clientid.cl_id); 102907cd4909SBenny Halevy return; 103007cd4909SBenny Halevy } 103107cd4909SBenny Halevy 10321da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10331da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10341da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10351da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10361da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 103936acb66bSBenny Halevy static inline void 104036acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 104136acb66bSBenny Halevy { 104236acb66bSBenny Halevy spin_lock(&client_lock); 104336acb66bSBenny Halevy renew_client_locked(clp); 104436acb66bSBenny Halevy spin_unlock(&client_lock); 104536acb66bSBenny Halevy } 104636acb66bSBenny Halevy 10471da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10481da177e4SLinus Torvalds static int 10491da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10521da177e4SLinus Torvalds return 0; 105360adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 105460adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10551da177e4SLinus Torvalds return 1; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds /* 10591da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10601da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10611da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10621da177e4SLinus Torvalds */ 106335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds struct nfs4_client *clp; 10661da177e4SLinus Torvalds 106735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 106835bba9a3SJ. Bruce Fields if (clp == NULL) 106935bba9a3SJ. Bruce Fields return NULL; 107067114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 107135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 107235bba9a3SJ. Bruce Fields kfree(clp); 107335bba9a3SJ. Bruce Fields return NULL; 107435bba9a3SJ. Bruce Fields } 10751da177e4SLinus Torvalds clp->cl_name.len = name.len; 10761da177e4SLinus Torvalds return clp; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static inline void 10801da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10811da177e4SLinus Torvalds { 1082508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 1083792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1084792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1085792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1086792c95ddSJ. Bruce Fields se_perclnt); 1087792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1088508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1089792c95ddSJ. Bruce Fields } 10901da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 10911da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 109268e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 10931da177e4SLinus Torvalds kfree(clp->cl_name.data); 10941da177e4SLinus Torvalds kfree(clp); 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 1097d7682988SBenny Halevy void 1098d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1099d7682988SBenny Halevy { 1100d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1101d7682988SBenny Halevy 1102d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1103d7682988SBenny Halevy return; 1104d7682988SBenny Halevy if (is_client_expired(clp)) { 1105d7682988SBenny Halevy free_client(clp); 1106d7682988SBenny Halevy session->se_client = NULL; 1107d7682988SBenny Halevy } else 1108d7682988SBenny Halevy renew_client_locked(clp); 1109d7682988SBenny Halevy spin_unlock(&client_lock); 1110d7682988SBenny Halevy } 1111d7682988SBenny Halevy 111284d38ac9SBenny Halevy /* must be called under the client_lock */ 111384d38ac9SBenny Halevy static inline void 111484d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 111584d38ac9SBenny Halevy { 1116792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1117792c95ddSJ. Bruce Fields 111807cd4909SBenny Halevy mark_client_expired(clp); 111984d38ac9SBenny Halevy list_del(&clp->cl_lru); 11204c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1121792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1122792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11234c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 112484d38ac9SBenny Halevy } 112584d38ac9SBenny Halevy 11261da177e4SLinus Torvalds static void 11271da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11281da177e4SLinus Torvalds { 1129fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11301da177e4SLinus Torvalds struct nfs4_delegation *dp; 11311da177e4SLinus Torvalds struct list_head reaplist; 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11341da177e4SLinus Torvalds spin_lock(&recall_lock); 1135ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1136ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1137ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11381da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11391da177e4SLinus Torvalds } 11401da177e4SLinus Torvalds spin_unlock(&recall_lock); 11411da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11421da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11431da177e4SLinus Torvalds unhash_delegation(dp); 11441da177e4SLinus Torvalds } 1145ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1146fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1147fe0750e5SJ. Bruce Fields release_openowner(oo); 11481da177e4SLinus Torvalds } 11496ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11502bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11512bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 115284d38ac9SBenny Halevy list_del(&clp->cl_idhash); 115384d38ac9SBenny Halevy list_del(&clp->cl_strhash); 115484d38ac9SBenny Halevy spin_lock(&client_lock); 115584d38ac9SBenny Halevy unhash_client_locked(clp); 115646583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1157b12a05cbSJ. Bruce Fields free_client(clp); 115846583e25SBenny Halevy spin_unlock(&client_lock); 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds 116135bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116235bba9a3SJ. Bruce Fields { 116335bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 116435bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11651da177e4SLinus Torvalds } 11661da177e4SLinus Torvalds 116735bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 116835bba9a3SJ. Bruce Fields { 11691da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11701da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds 117335bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 117435bba9a3SJ. Bruce Fields { 11751da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11761da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11771da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11781da177e4SLinus Torvalds get_group_info(target->cr_group_info); 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 118135bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1182599e0a22SJ. Bruce Fields { 1183a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11841da177e4SLinus Torvalds } 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds static int 1187599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1188599e0a22SJ. Bruce Fields { 1189599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds 11921da177e4SLinus Torvalds static int 1193599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1194599e0a22SJ. Bruce Fields { 1195599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11961da177e4SLinus Torvalds } 11971da177e4SLinus Torvalds 11981da177e4SLinus Torvalds /* XXX what about NGROUP */ 11991da177e4SLinus Torvalds static int 1200599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1201599e0a22SJ. Bruce Fields { 1202599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12055ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12065ec7b46cSJ. Bruce Fields { 12075ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12085ec7b46cSJ. Bruce Fields 12091da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 12101da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 1213deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1214deda2faaSJ. Bruce Fields { 1215ab4684d1SChuck Lever __be32 verf[2]; 1216deda2faaSJ. Bruce Fields static u32 i; 12171da177e4SLinus Torvalds 1218ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1219ab4684d1SChuck Lever verf[1] = (__be32)i++; 1220ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12211da177e4SLinus Torvalds } 12221da177e4SLinus Torvalds 122338c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12244581d140SJ. Bruce Fields { 122538c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12264581d140SJ. Bruce Fields } 12274d71ab87SJ. Bruce Fields 122838c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1229f459e453SJ. Bruce Fields { 1230f459e453SJ. Bruce Fields struct nfs4_stid *s; 1231f459e453SJ. Bruce Fields 123238c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1233f459e453SJ. Bruce Fields if (!s) 1234f459e453SJ. Bruce Fields return NULL; 1235f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12364d71ab87SJ. Bruce Fields return s; 12374581d140SJ. Bruce Fields return NULL; 12384581d140SJ. Bruce Fields } 12394581d140SJ. Bruce Fields 1240b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1241b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1242b09333c4SRicardo Labiaga { 1243b09333c4SRicardo Labiaga struct nfs4_client *clp; 1244b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1245b09333c4SRicardo Labiaga char *princ; 1246b09333c4SRicardo Labiaga 1247b09333c4SRicardo Labiaga clp = alloc_client(name); 1248b09333c4SRicardo Labiaga if (clp == NULL) 1249b09333c4SRicardo Labiaga return NULL; 1250b09333c4SRicardo Labiaga 1251792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1252792c95ddSJ. Bruce Fields 1253b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1254b09333c4SRicardo Labiaga if (princ) { 1255b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1256b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1257508dc6e1SBenny Halevy spin_lock(&client_lock); 1258b09333c4SRicardo Labiaga free_client(clp); 1259508dc6e1SBenny Halevy spin_unlock(&client_lock); 1260b09333c4SRicardo Labiaga return NULL; 1261b09333c4SRicardo Labiaga } 1262b09333c4SRicardo Labiaga } 1263b09333c4SRicardo Labiaga 126438c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1265b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 126646583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 126777a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1268b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1269b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1270b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1271b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1272b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12735ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12746ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1275cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 127607cd4909SBenny Halevy clp->cl_time = get_seconds(); 1277b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1278b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1279b09333c4SRicardo Labiaga copy_verf(clp, verf); 1280b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1281b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1282b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1283b09333c4SRicardo Labiaga gen_confirm(clp); 1284edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1285b09333c4SRicardo Labiaga return clp; 1286b09333c4SRicardo Labiaga } 1287b09333c4SRicardo Labiaga 1288fd39ca9aSNeilBrown static void 12891da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 12901da177e4SLinus Torvalds { 12911da177e4SLinus Torvalds unsigned int idhashval; 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 12941da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12951da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 129636acb66bSBenny Halevy renew_client(clp); 12971da177e4SLinus Torvalds } 12981da177e4SLinus Torvalds 1299fd39ca9aSNeilBrown static void 13001da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13011da177e4SLinus Torvalds { 13021da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13031da177e4SLinus Torvalds unsigned int strhashval; 13041da177e4SLinus Torvalds 13051da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1306f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1307a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1308328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13091da177e4SLinus Torvalds renew_client(clp); 13101da177e4SLinus Torvalds } 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds static struct nfs4_client * 13131da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13141da177e4SLinus Torvalds { 13151da177e4SLinus Torvalds struct nfs4_client *clp; 13161da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1319a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1320a50d2ad1SJ. Bruce Fields renew_client(clp); 13211da177e4SLinus Torvalds return clp; 13221da177e4SLinus Torvalds } 1323a50d2ad1SJ. Bruce Fields } 13241da177e4SLinus Torvalds return NULL; 13251da177e4SLinus Torvalds } 13261da177e4SLinus Torvalds 13271da177e4SLinus Torvalds static struct nfs4_client * 13281da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13291da177e4SLinus Torvalds { 13301da177e4SLinus Torvalds struct nfs4_client *clp; 13311da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1334599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13351da177e4SLinus Torvalds return clp; 13361da177e4SLinus Torvalds } 13371da177e4SLinus Torvalds return NULL; 13381da177e4SLinus Torvalds } 13391da177e4SLinus Torvalds 13406e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1341a1bcecd2SAndy Adamson { 13426e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1343a1bcecd2SAndy Adamson } 1344a1bcecd2SAndy Adamson 134528ce6054SNeilBrown static struct nfs4_client * 1346e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 134728ce6054SNeilBrown { 134828ce6054SNeilBrown struct nfs4_client *clp; 134928ce6054SNeilBrown 135028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1351e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 135228ce6054SNeilBrown return clp; 135328ce6054SNeilBrown } 135428ce6054SNeilBrown return NULL; 135528ce6054SNeilBrown } 135628ce6054SNeilBrown 135728ce6054SNeilBrown static struct nfs4_client * 1358e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 135928ce6054SNeilBrown { 136028ce6054SNeilBrown struct nfs4_client *clp; 136128ce6054SNeilBrown 136228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1363e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 136428ce6054SNeilBrown return clp; 136528ce6054SNeilBrown } 136628ce6054SNeilBrown return NULL; 136728ce6054SNeilBrown } 136828ce6054SNeilBrown 1369fd39ca9aSNeilBrown static void 13706f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13711da177e4SLinus Torvalds { 137207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13736f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13746f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13757077ecbaSJeff Layton unsigned short expected_family; 13761da177e4SLinus Torvalds 13777077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13787077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13797077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 13807077ecbaSJeff Layton expected_family = AF_INET; 13817077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 13827077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 13837077ecbaSJeff Layton expected_family = AF_INET6; 13847077ecbaSJeff Layton else 13851da177e4SLinus Torvalds goto out_err; 13861da177e4SLinus Torvalds 1387f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1388aa9a4ec7SJeff Layton se->se_callback_addr_len, 138907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 139007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1391aa9a4ec7SJeff Layton 139207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 13931da177e4SLinus Torvalds goto out_err; 1394aa9a4ec7SJeff Layton 139507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 139607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1397fbf4665fSJeff Layton 139807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 139907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1400849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14011da177e4SLinus Torvalds return; 14021da177e4SLinus Torvalds out_err: 140307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 140407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1405849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14061da177e4SLinus Torvalds "will not receive delegations\n", 14071da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds return; 14101da177e4SLinus Torvalds } 14111da177e4SLinus Torvalds 1412074fe897SAndy Adamson /* 1413557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1414074fe897SAndy Adamson */ 1415074fe897SAndy Adamson void 1416074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1417074fe897SAndy Adamson { 1418557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1419557ce264SAndy Adamson unsigned int base; 1420074fe897SAndy Adamson 1421557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1422074fe897SAndy Adamson 1423557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1424557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1425bf864a31SAndy Adamson 1426bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1427bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1428557ce264SAndy Adamson slot->sl_datalen = 0; 1429bf864a31SAndy Adamson return; 1430bf864a31SAndy Adamson } 1431557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1432557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1433557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1434557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1435557ce264SAndy Adamson slot->sl_datalen)) 1436557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1437557ce264SAndy Adamson return; 1438074fe897SAndy Adamson } 1439074fe897SAndy Adamson 1440074fe897SAndy Adamson /* 1441abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1442abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1443abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1444abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1445abfabf8cSAndy Adamson * 1446074fe897SAndy Adamson */ 1447abfabf8cSAndy Adamson static __be32 1448abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1449abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1450074fe897SAndy Adamson { 1451abfabf8cSAndy Adamson struct nfsd4_op *op; 1452abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1453074fe897SAndy Adamson 1454abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1455abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1456abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1457abfabf8cSAndy Adamson 1458abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 145973e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1460abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1461abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1462abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1463074fe897SAndy Adamson } 1464abfabf8cSAndy Adamson return op->status; 1465074fe897SAndy Adamson } 1466074fe897SAndy Adamson 1467074fe897SAndy Adamson /* 1468557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1469557ce264SAndy Adamson * session values. 1470074fe897SAndy Adamson */ 1471074fe897SAndy Adamson __be32 1472bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1473bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1474074fe897SAndy Adamson { 1475557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1476074fe897SAndy Adamson __be32 status; 1477074fe897SAndy Adamson 1478557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1479074fe897SAndy Adamson 1480abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1481abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1482abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1483abfabf8cSAndy Adamson return status; 1484074fe897SAndy Adamson 1485557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1486557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1487074fe897SAndy Adamson 1488557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1489557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1490557ce264SAndy Adamson status = slot->sl_status; 1491074fe897SAndy Adamson 1492074fe897SAndy Adamson return status; 1493074fe897SAndy Adamson } 1494074fe897SAndy Adamson 14950733d213SAndy Adamson /* 14960733d213SAndy Adamson * Set the exchange_id flags returned by the server. 14970733d213SAndy Adamson */ 14980733d213SAndy Adamson static void 14990733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15000733d213SAndy Adamson { 15010733d213SAndy Adamson /* pNFS is not supported */ 15020733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15030733d213SAndy Adamson 15040733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15050733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15060733d213SAndy Adamson 15070733d213SAndy Adamson /* set the wire flags to return to client. */ 15080733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15090733d213SAndy Adamson } 15100733d213SAndy Adamson 1511b37ad28bSAl Viro __be32 1512069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1513069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1514069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1515069b6ad4SAndy Adamson { 15160733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 151757b7b43bSJ. Bruce Fields __be32 status; 15180733d213SAndy Adamson unsigned int strhashval; 15190733d213SAndy Adamson char dname[HEXDIR_LEN]; 1520363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15210733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1522363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 15230733d213SAndy Adamson 1524363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15250733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1526363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15270733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1528363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15290733d213SAndy Adamson 1530a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15310733d213SAndy Adamson return nfserr_inval; 15320733d213SAndy Adamson 15330733d213SAndy Adamson /* Currently only support SP4_NONE */ 15340733d213SAndy Adamson switch (exid->spa_how) { 15350733d213SAndy Adamson case SP4_NONE: 15360733d213SAndy Adamson break; 15370733d213SAndy Adamson case SP4_SSV: 1538044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15390733d213SAndy Adamson default: 15400733d213SAndy Adamson BUG(); /* checked by xdr code */ 15410733d213SAndy Adamson case SP4_MACH_CRED: 15420733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15430733d213SAndy Adamson } 15440733d213SAndy Adamson 15450733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15460733d213SAndy Adamson 15470733d213SAndy Adamson if (status) 15482786cc3aSJ. Bruce Fields return status; 15490733d213SAndy Adamson 15500733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15510733d213SAndy Adamson 15520733d213SAndy Adamson nfs4_lock_state(); 1553e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15540733d213SAndy Adamson if (conf) { 1555e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1556e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1557e203d506SJ. Bruce Fields goto out; 1558e203d506SJ. Bruce Fields } 1559ea236d07SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1560ea236d07SJ. Bruce Fields /* 18.35.4 case 9 */ 1561ea236d07SJ. Bruce Fields if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) 1562ea236d07SJ. Bruce Fields status = nfserr_perm; 1563ea236d07SJ. Bruce Fields else /* case 3 */ 1564ea236d07SJ. Bruce Fields status = nfserr_clid_inuse; 1565ea236d07SJ. Bruce Fields goto out; 1566ea236d07SJ. Bruce Fields } 15670733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 15680733d213SAndy Adamson /* 18.35.4 case 8 */ 15690733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15700733d213SAndy Adamson status = nfserr_not_same; 15710733d213SAndy Adamson goto out; 15720733d213SAndy Adamson } 15730733d213SAndy Adamson /* Client reboot: destroy old state */ 15740733d213SAndy Adamson expire_client(conf); 15750733d213SAndy Adamson goto out_new; 15760733d213SAndy Adamson } 15770733d213SAndy Adamson /* 15780733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 15790733d213SAndy Adamson * confirmed client id (18.35.3). 15800733d213SAndy Adamson */ 15810733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 15820733d213SAndy Adamson 15830733d213SAndy Adamson /* 15840733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 15850733d213SAndy Adamson * Leave confirmed record intact and return same result. 15860733d213SAndy Adamson */ 15870733d213SAndy Adamson new = conf; 15880733d213SAndy Adamson goto out_copy; 15896ddbbbfeSMike Sager } 15906ddbbbfeSMike Sager 15910733d213SAndy Adamson /* 18.35.4 case 7 */ 15920733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15930733d213SAndy Adamson status = nfserr_noent; 15940733d213SAndy Adamson goto out; 15950733d213SAndy Adamson } 15960733d213SAndy Adamson 1597e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 15980733d213SAndy Adamson if (unconf) { 15990733d213SAndy Adamson /* 16000733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 16010733d213SAndy Adamson * a new unconfirmed record should be generated regardless 16020733d213SAndy Adamson * of whether any properties have changed. 16030733d213SAndy Adamson */ 16040733d213SAndy Adamson expire_client(unconf); 16050733d213SAndy Adamson } 16060733d213SAndy Adamson 16070733d213SAndy Adamson out_new: 16080733d213SAndy Adamson /* Normal case */ 1609b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16100733d213SAndy Adamson if (new == NULL) { 16114731030dSJ. Bruce Fields status = nfserr_jukebox; 16120733d213SAndy Adamson goto out; 16130733d213SAndy Adamson } 16140733d213SAndy Adamson 16150733d213SAndy Adamson gen_clid(new); 16160733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16170733d213SAndy Adamson out_copy: 16180733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16190733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16200733d213SAndy Adamson 162138eb76a5SAndy Adamson exid->seqid = 1; 16220733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16230733d213SAndy Adamson 16240733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 162549557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16260733d213SAndy Adamson status = nfs_ok; 16270733d213SAndy Adamson 16280733d213SAndy Adamson out: 16290733d213SAndy Adamson nfs4_unlock_state(); 16300733d213SAndy Adamson return status; 1631069b6ad4SAndy Adamson } 1632069b6ad4SAndy Adamson 163357b7b43bSJ. Bruce Fields static __be32 163488e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1635b85d4c01SBenny Halevy { 163688e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 163788e588d5SAndy Adamson slot_seqid); 1638b85d4c01SBenny Halevy 1639b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 164088e588d5SAndy Adamson if (slot_inuse) { 164188e588d5SAndy Adamson if (seqid == slot_seqid) 1642b85d4c01SBenny Halevy return nfserr_jukebox; 1643b85d4c01SBenny Halevy else 1644b85d4c01SBenny Halevy return nfserr_seq_misordered; 1645b85d4c01SBenny Halevy } 1646f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 164788e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1648b85d4c01SBenny Halevy return nfs_ok; 164988e588d5SAndy Adamson if (seqid == slot_seqid) 1650b85d4c01SBenny Halevy return nfserr_replay_cache; 1651b85d4c01SBenny Halevy return nfserr_seq_misordered; 1652b85d4c01SBenny Halevy } 1653b85d4c01SBenny Halevy 165449557cc7SAndy Adamson /* 165549557cc7SAndy Adamson * Cache the create session result into the create session single DRC 165649557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 165749557cc7SAndy Adamson * Do this for solo or embedded create session operations. 165849557cc7SAndy Adamson */ 165949557cc7SAndy Adamson static void 166049557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 166157b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 166249557cc7SAndy Adamson { 166349557cc7SAndy Adamson slot->sl_status = nfserr; 166449557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 166549557cc7SAndy Adamson } 166649557cc7SAndy Adamson 166749557cc7SAndy Adamson static __be32 166849557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 166949557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 167049557cc7SAndy Adamson { 167149557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 167249557cc7SAndy Adamson return slot->sl_status; 167349557cc7SAndy Adamson } 167449557cc7SAndy Adamson 16751b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 16761b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 16771b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16781b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 16791b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16801b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 16811b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 16821b74c25bSMi Jinlong 16831b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 16841b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 16851b74c25bSMi Jinlong 1 + /* status */ \ 16861b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16871b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 16881b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16891b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 16901b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 16911b74c25bSMi Jinlong 169257b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 16931b74c25bSMi Jinlong { 16941b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 16951b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 16961b74c25bSMi Jinlong } 16971b74c25bSMi Jinlong 1698069b6ad4SAndy Adamson __be32 1699069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1700069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1701069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1702069b6ad4SAndy Adamson { 1703363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1704ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1705ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 170649557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 170786c3e16cSJ. Bruce Fields bool confirm_me = false; 170857b7b43bSJ. Bruce Fields __be32 status = 0; 1709ec6b5d7bSAndy Adamson 1710a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1711a62573dcSMi Jinlong return nfserr_inval; 1712a62573dcSMi Jinlong 1713ec6b5d7bSAndy Adamson nfs4_lock_state(); 1714ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1715ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1716ec6b5d7bSAndy Adamson 1717ec6b5d7bSAndy Adamson if (conf) { 171849557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 171949557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 172038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1721ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 172249557cc7SAndy Adamson cs_slot->sl_seqid); 172338eb76a5SAndy Adamson /* Return the cached reply status */ 172449557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 172538eb76a5SAndy Adamson goto out; 172649557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1727ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1728ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1729ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 173049557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1731ec6b5d7bSAndy Adamson goto out; 1732ec6b5d7bSAndy Adamson } 1733ec6b5d7bSAndy Adamson } else if (unconf) { 1734ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1735363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1736ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1737ec6b5d7bSAndy Adamson goto out; 1738ec6b5d7bSAndy Adamson } 1739ec6b5d7bSAndy Adamson 174049557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 174149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 174238eb76a5SAndy Adamson if (status) { 174338eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1744ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1745cd5b8144SJ. Bruce Fields goto out; 1746ec6b5d7bSAndy Adamson } 1747ec6b5d7bSAndy Adamson 174886c3e16cSJ. Bruce Fields confirm_me = true; 1749ec6b5d7bSAndy Adamson conf = unconf; 1750ec6b5d7bSAndy Adamson } else { 1751ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1752ec6b5d7bSAndy Adamson goto out; 1753ec6b5d7bSAndy Adamson } 1754ec6b5d7bSAndy Adamson 1755408b79bcSJ. Bruce Fields /* 17568323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17578323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17588323c3b2SJ. Bruce Fields */ 17598323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17608323c3b2SJ. Bruce Fields /* 1761408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1762408b79bcSJ. Bruce Fields */ 1763408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1764408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1765408b79bcSJ. Bruce Fields 17661b74c25bSMi Jinlong status = nfserr_toosmall; 17671b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17681b74c25bSMi Jinlong goto out; 17691b74c25bSMi Jinlong 1770ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1771ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1772ac7c46f2SJ. Bruce Fields if (!new) 1773ec6b5d7bSAndy Adamson goto out; 1774ac7c46f2SJ. Bruce Fields status = nfs_ok; 1775ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1776ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 177712050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 177812050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 177986c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 178049557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1781ec6b5d7bSAndy Adamson 178249557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 178349557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 178486c3e16cSJ. Bruce Fields if (confirm_me) 178586c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1786ec6b5d7bSAndy Adamson out: 1787ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1788ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1789ec6b5d7bSAndy Adamson return status; 1790069b6ad4SAndy Adamson } 1791069b6ad4SAndy Adamson 179257716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 179357716355SJ. Bruce Fields { 179457716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 179557716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 179657716355SJ. Bruce Fields 179757716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 179857716355SJ. Bruce Fields } 179957716355SJ. Bruce Fields 18001d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18011d1bc8f2SJ. Bruce Fields { 18021d1bc8f2SJ. Bruce Fields switch (*dir) { 18031d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18041d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18051d1bc8f2SJ. Bruce Fields return nfs_ok; 18061d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18071d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18081d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18091d1bc8f2SJ. Bruce Fields return nfs_ok; 18101d1bc8f2SJ. Bruce Fields }; 18111d1bc8f2SJ. Bruce Fields return nfserr_inval; 18121d1bc8f2SJ. Bruce Fields } 18131d1bc8f2SJ. Bruce Fields 18141d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18151d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18161d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18171d1bc8f2SJ. Bruce Fields { 18181d1bc8f2SJ. Bruce Fields __be32 status; 18191d1bc8f2SJ. Bruce Fields 18201d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18211d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18221d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18231d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18241d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18251d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18261d1bc8f2SJ. Bruce Fields if (cstate->session) { 18271d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18281d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18291d1bc8f2SJ. Bruce Fields } 18301d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18311d1bc8f2SJ. Bruce Fields if (!cstate->session) 18321d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18331d1bc8f2SJ. Bruce Fields 18341d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18351db2b9ddSBryan Schumaker if (!status) 18361d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18371db2b9ddSBryan Schumaker return status; 18381d1bc8f2SJ. Bruce Fields } 18391d1bc8f2SJ. Bruce Fields 18405d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18415d4cec2fSJ. Bruce Fields { 18425d4cec2fSJ. Bruce Fields if (!session) 18435d4cec2fSJ. Bruce Fields return 0; 18445d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18455d4cec2fSJ. Bruce Fields } 18465d4cec2fSJ. Bruce Fields 1847069b6ad4SAndy Adamson __be32 1848069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1849069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1850069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1851069b6ad4SAndy Adamson { 1852e10e0cfcSBenny Halevy struct nfsd4_session *ses; 185357b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1854e10e0cfcSBenny Halevy 1855e10e0cfcSBenny Halevy /* Notes: 1856e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1857e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1858e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1859e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1860e10e0cfcSBenny Halevy */ 1861e10e0cfcSBenny Halevy 18625d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 186357716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 186457716355SJ. Bruce Fields return nfserr_not_only_op; 186557716355SJ. Bruce Fields } 1866e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18679089f1b4SBenny Halevy spin_lock(&client_lock); 1868e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1869e10e0cfcSBenny Halevy if (!ses) { 18709089f1b4SBenny Halevy spin_unlock(&client_lock); 1871e10e0cfcSBenny Halevy goto out; 1872e10e0cfcSBenny Halevy } 1873e10e0cfcSBenny Halevy 1874e10e0cfcSBenny Halevy unhash_session(ses); 18759089f1b4SBenny Halevy spin_unlock(&client_lock); 1876e10e0cfcSBenny Halevy 1877ab707e15SBenny Halevy nfs4_lock_state(); 187884f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1879ab707e15SBenny Halevy nfs4_unlock_state(); 188019cf5c02SJ. Bruce Fields 1881508dc6e1SBenny Halevy spin_lock(&client_lock); 188219cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1883508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1884508dc6e1SBenny Halevy spin_unlock(&client_lock); 1885e10e0cfcSBenny Halevy status = nfs_ok; 1886e10e0cfcSBenny Halevy out: 1887e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1888e10e0cfcSBenny Halevy return status; 1889069b6ad4SAndy Adamson } 1890069b6ad4SAndy Adamson 1891a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1892328ead28SJ. Bruce Fields { 1893328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1894328ead28SJ. Bruce Fields 1895328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1896a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1897328ead28SJ. Bruce Fields return c; 1898328ead28SJ. Bruce Fields } 1899328ead28SJ. Bruce Fields } 1900328ead28SJ. Bruce Fields return NULL; 1901328ead28SJ. Bruce Fields } 1902328ead28SJ. Bruce Fields 1903a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1904328ead28SJ. Bruce Fields { 1905328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1906a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 190721b75b01SJ. Bruce Fields int ret; 1908328ead28SJ. Bruce Fields 1909328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1910a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1911328ead28SJ. Bruce Fields if (c) { 1912328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1913328ead28SJ. Bruce Fields free_conn(new); 1914328ead28SJ. Bruce Fields return; 1915328ead28SJ. Bruce Fields } 1916328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1917328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 191821b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 191921b75b01SJ. Bruce Fields if (ret) 192021b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 192121b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1922328ead28SJ. Bruce Fields return; 1923328ead28SJ. Bruce Fields } 1924328ead28SJ. Bruce Fields 1925868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1926868b89c3SMi Jinlong { 1927868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1928868b89c3SMi Jinlong 1929868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1930868b89c3SMi Jinlong } 1931868b89c3SMi Jinlong 1932ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1933ae82a8d0SMi Jinlong struct nfsd4_session *session) 1934ae82a8d0SMi Jinlong { 1935ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1936ae82a8d0SMi Jinlong 1937ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1938ae82a8d0SMi Jinlong } 1939ae82a8d0SMi Jinlong 1940069b6ad4SAndy Adamson __be32 1941b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1942069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1943069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1944069b6ad4SAndy Adamson { 1945f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1946b85d4c01SBenny Halevy struct nfsd4_session *session; 1947b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1948a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 194957b7b43bSJ. Bruce Fields __be32 status; 1950b85d4c01SBenny Halevy 1951f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1952f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1953f9bb94c4SAndy Adamson 1954a663bdd8SJ. Bruce Fields /* 1955a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1956a663bdd8SJ. Bruce Fields * below. 1957a663bdd8SJ. Bruce Fields */ 1958a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1959a663bdd8SJ. Bruce Fields if (!conn) 1960a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1961a663bdd8SJ. Bruce Fields 19629089f1b4SBenny Halevy spin_lock(&client_lock); 1963b85d4c01SBenny Halevy status = nfserr_badsession; 1964b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1965b85d4c01SBenny Halevy if (!session) 1966b85d4c01SBenny Halevy goto out; 1967b85d4c01SBenny Halevy 1968868b89c3SMi Jinlong status = nfserr_too_many_ops; 1969868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1970868b89c3SMi Jinlong goto out; 1971868b89c3SMi Jinlong 1972ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1973ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1974ae82a8d0SMi Jinlong goto out; 1975ae82a8d0SMi Jinlong 1976b85d4c01SBenny Halevy status = nfserr_badslot; 19776c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1978b85d4c01SBenny Halevy goto out; 1979b85d4c01SBenny Halevy 1980557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1981b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1982b85d4c01SBenny Halevy 1983a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1984a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1985a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1986a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1987a8dfdaebSAndy Adamson 198873e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 198973e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 1990b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1991bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 1992bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 1993bf5c43c8SJ. Bruce Fields goto out; 1994b85d4c01SBenny Halevy cstate->slot = slot; 1995b85d4c01SBenny Halevy cstate->session = session; 1996da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1997557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1998bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1999da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2000aaf84eb9SBenny Halevy goto out; 2001b85d4c01SBenny Halevy } 2002b85d4c01SBenny Halevy if (status) 2003b85d4c01SBenny Halevy goto out; 2004b85d4c01SBenny Halevy 2005a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2006a663bdd8SJ. Bruce Fields conn = NULL; 2007328ead28SJ. Bruce Fields 2008b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2009b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2010bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 201173e79482SJ. Bruce Fields if (seq->cachethis) 201273e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2013bf5c43c8SJ. Bruce Fields else 2014bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2015b85d4c01SBenny Halevy 2016b85d4c01SBenny Halevy cstate->slot = slot; 2017b85d4c01SBenny Halevy cstate->session = session; 2018b85d4c01SBenny Halevy 2019b85d4c01SBenny Halevy out: 202026c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2021aaf84eb9SBenny Halevy if (cstate->session) { 20220d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20230d7bb719SJ. Bruce Fields 202436acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20250d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20265423732aSBenny Halevy switch (clp->cl_cb_state) { 20275423732aSBenny Halevy case NFSD4_CB_DOWN: 2028fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20295423732aSBenny Halevy break; 20305423732aSBenny Halevy case NFSD4_CB_FAULT: 2031fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20325423732aSBenny Halevy break; 2033fc0c3dd1SBenny Halevy default: 2034fc0c3dd1SBenny Halevy seq->status_flags = 0; 20355423732aSBenny Halevy } 2036aaf84eb9SBenny Halevy } 2037a663bdd8SJ. Bruce Fields kfree(conn); 203836acb66bSBenny Halevy spin_unlock(&client_lock); 2039b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2040b85d4c01SBenny Halevy return status; 2041069b6ad4SAndy Adamson } 2042069b6ad4SAndy Adamson 2043345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 2044345c2842SMi Jinlong { 2045345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 2046345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 2047345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 2048345c2842SMi Jinlong } 2049345c2842SMi Jinlong 2050345c2842SMi Jinlong __be32 2051345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2052345c2842SMi Jinlong { 2053345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 205457b7b43bSJ. Bruce Fields __be32 status = 0; 2055345c2842SMi Jinlong 2056345c2842SMi Jinlong nfs4_lock_state(); 2057345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2058345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2059345c2842SMi Jinlong 2060345c2842SMi Jinlong if (conf) { 2061345c2842SMi Jinlong clp = conf; 2062345c2842SMi Jinlong 2063345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 2064345c2842SMi Jinlong status = nfserr_clientid_busy; 2065345c2842SMi Jinlong goto out; 2066345c2842SMi Jinlong } 2067345c2842SMi Jinlong 2068345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2069345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2070345c2842SMi Jinlong status = nfserr_clientid_busy; 2071345c2842SMi Jinlong goto out; 2072345c2842SMi Jinlong } 2073345c2842SMi Jinlong } else if (unconf) 2074345c2842SMi Jinlong clp = unconf; 2075345c2842SMi Jinlong else { 2076345c2842SMi Jinlong status = nfserr_stale_clientid; 2077345c2842SMi Jinlong goto out; 2078345c2842SMi Jinlong } 2079345c2842SMi Jinlong 2080345c2842SMi Jinlong expire_client(clp); 2081345c2842SMi Jinlong out: 2082345c2842SMi Jinlong nfs4_unlock_state(); 2083345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2084345c2842SMi Jinlong return status; 2085345c2842SMi Jinlong } 2086345c2842SMi Jinlong 2087069b6ad4SAndy Adamson __be32 20884dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 20894dc6ec00SJ. Bruce Fields { 209057b7b43bSJ. Bruce Fields __be32 status = 0; 2091bcecf1ccSMi Jinlong 20924dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 20934dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 20944dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 20954dc6ec00SJ. Bruce Fields /* 20964dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 20974dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 20984dc6ec00SJ. Bruce Fields */ 20994dc6ec00SJ. Bruce Fields return nfs_ok; 21004dc6ec00SJ. Bruce Fields } 2101bcecf1ccSMi Jinlong 21024dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2103bcecf1ccSMi Jinlong status = nfserr_complete_already; 2104a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2105a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2106bcecf1ccSMi Jinlong goto out; 2107bcecf1ccSMi Jinlong 2108bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2109bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21104dc6ec00SJ. Bruce Fields /* 21114dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21124dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21134dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21144dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21154dc6ec00SJ. Bruce Fields * client. 21164dc6ec00SJ. Bruce Fields */ 2117bcecf1ccSMi Jinlong goto out; 2118bcecf1ccSMi Jinlong 2119bcecf1ccSMi Jinlong status = nfs_ok; 21202a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2121bcecf1ccSMi Jinlong out: 21224dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2123bcecf1ccSMi Jinlong return status; 21244dc6ec00SJ. Bruce Fields } 21254dc6ec00SJ. Bruce Fields 21264dc6ec00SJ. Bruce Fields __be32 2127b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2128b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21291da177e4SLinus Torvalds { 2130a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21311da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21321da177e4SLinus Torvalds unsigned int strhashval; 213328ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2134b37ad28bSAl Viro __be32 status; 2135a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21361da177e4SLinus Torvalds 2137a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2138a55370a3SNeilBrown if (status) 213973aea4ecSNeil Brown return status; 2140a55370a3SNeilBrown 21411da177e4SLinus Torvalds /* 21421da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 21431da177e4SLinus Torvalds * We get here on a DRC miss. 21441da177e4SLinus Torvalds */ 21451da177e4SLinus Torvalds 2146a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21471da177e4SLinus Torvalds 21481da177e4SLinus Torvalds nfs4_lock_state(); 2149e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 215028ce6054SNeilBrown if (conf) { 2151a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 21521da177e4SLinus Torvalds status = nfserr_clid_inuse; 2153e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2154e203d506SJ. Bruce Fields goto out; 2155026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2156363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2157363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2158363168b4SJeff Layton sizeof(addr_str)); 2159026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2160363168b4SJeff Layton "at %s\n", addr_str); 21611da177e4SLinus Torvalds goto out; 21621da177e4SLinus Torvalds } 21631da177e4SLinus Torvalds } 2164a186e767SJ. Bruce Fields /* 2165a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 2166a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 2167a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 2168a186e767SJ. Bruce Fields */ 2169e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21703e772463SJ. Bruce Fields status = nfserr_jukebox; 21711da177e4SLinus Torvalds if (!conf) { 21721da177e4SLinus Torvalds /* 2173a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 2174a186e767SJ. Bruce Fields * placed first, because it is the normal case 21751da177e4SLinus Torvalds */ 21761da177e4SLinus Torvalds if (unconf) 21771da177e4SLinus Torvalds expire_client(unconf); 2178b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2179a55370a3SNeilBrown if (new == NULL) 21801da177e4SLinus Torvalds goto out; 21811da177e4SLinus Torvalds gen_clid(new); 2182599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 21831da177e4SLinus Torvalds /* 2184a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 2185a186e767SJ. Bruce Fields * probable callback update 21861da177e4SLinus Torvalds */ 218731f4a6c1SNeilBrown if (unconf) { 218831f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 218931f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 219031f4a6c1SNeilBrown * This has the advantage that there is at most 219131f4a6c1SNeilBrown * one {*x***} in either list at any time. 219231f4a6c1SNeilBrown */ 21931da177e4SLinus Torvalds expire_client(unconf); 21941da177e4SLinus Torvalds } 2195b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2196a55370a3SNeilBrown if (new == NULL) 21971da177e4SLinus Torvalds goto out; 21981da177e4SLinus Torvalds copy_clid(new, conf); 21991da177e4SLinus Torvalds } else if (!unconf) { 22001da177e4SLinus Torvalds /* 2201a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2202a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2203a186e767SJ. Bruce Fields * confirmed. 22041da177e4SLinus Torvalds */ 2205b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2206a55370a3SNeilBrown if (new == NULL) 22071da177e4SLinus Torvalds goto out; 22081da177e4SLinus Torvalds gen_clid(new); 220949ba8781SJ. Bruce Fields } else { 22101da177e4SLinus Torvalds /* 2211a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2212a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2213a186e767SJ. Bruce Fields * confirmed. 22141da177e4SLinus Torvalds */ 22151da177e4SLinus Torvalds expire_client(unconf); 2216b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2217a55370a3SNeilBrown if (new == NULL) 22181da177e4SLinus Torvalds goto out; 22191da177e4SLinus Torvalds gen_clid(new); 22201da177e4SLinus Torvalds } 22218323c3b2SJ. Bruce Fields /* 22228323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22238323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22248323c3b2SJ. Bruce Fields */ 22258323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22266f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2227c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22281da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22291da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22301da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22311da177e4SLinus Torvalds status = nfs_ok; 22321da177e4SLinus Torvalds out: 22331da177e4SLinus Torvalds nfs4_unlock_state(); 22341da177e4SLinus Torvalds return status; 22351da177e4SLinus Torvalds } 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvalds 22381da177e4SLinus Torvalds /* 2239a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2240a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2241a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 22421da177e4SLinus Torvalds */ 2243b37ad28bSAl Viro __be32 2244b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2245b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2246b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22471da177e4SLinus Torvalds { 224821ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22491da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22501da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2251b37ad28bSAl Viro __be32 status; 22521da177e4SLinus Torvalds 22531da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22541da177e4SLinus Torvalds return nfserr_stale_clientid; 22551da177e4SLinus Torvalds /* 22561da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 22571da177e4SLinus Torvalds * We get here on a DRC miss. 22581da177e4SLinus Torvalds */ 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds nfs4_lock_state(); 226121ab45a4SNeilBrown 226221ab45a4SNeilBrown conf = find_confirmed_client(clid); 226321ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 226421ab45a4SNeilBrown 2265a186e767SJ. Bruce Fields /* 2266a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2267a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2268a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2269a186e767SJ. Bruce Fields */ 2270f07ea10dSChuck Lever status = nfserr_clid_inuse; 2271366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2272a186e767SJ. Bruce Fields /* 2273a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2274a186e767SJ. Bruce Fields * callback update 22757c79f737SNeilBrown */ 2276599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22771da177e4SLinus Torvalds status = nfserr_clid_inuse; 22781da177e4SLinus Torvalds else { 22795a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22805a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22811a69c179SNeilBrown expire_client(unconf); 22821da177e4SLinus Torvalds status = nfs_ok; 22831da177e4SLinus Torvalds } 2284f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2285a186e767SJ. Bruce Fields /* 2286a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2287a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2288a186e767SJ. Bruce Fields * do nothing. 22897c79f737SNeilBrown */ 2290599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22911da177e4SLinus Torvalds status = nfserr_clid_inuse; 229221ab45a4SNeilBrown else 22931da177e4SLinus Torvalds status = nfs_ok; 22947c79f737SNeilBrown } else if (!conf && unconf 2295599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2296a186e767SJ. Bruce Fields /* 2297a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2298a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 22991da177e4SLinus Torvalds */ 2300599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 23011da177e4SLinus Torvalds status = nfserr_clid_inuse; 23021da177e4SLinus Torvalds } else { 23031a69c179SNeilBrown unsigned int hash = 23041a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 23051a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2306e203d506SJ. Bruce Fields hash); 23071a69c179SNeilBrown if (conf) { 23082a4317c5SJeff Layton nfsd4_client_record_remove(conf); 23091a69c179SNeilBrown expire_client(conf); 23101a69c179SNeilBrown } 23111da177e4SLinus Torvalds move_to_confirmed(unconf); 231221ab45a4SNeilBrown conf = unconf; 23135a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 23141a69c179SNeilBrown status = nfs_ok; 23151da177e4SLinus Torvalds } 2316599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2317599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 23187c79f737SNeilBrown &confirm)))) { 2319a186e767SJ. Bruce Fields /* 2320a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2321a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 23221da177e4SLinus Torvalds */ 23231da177e4SLinus Torvalds status = nfserr_stale_clientid; 232408e8987cSNeilBrown } 2325f07ea10dSChuck Lever 23261da177e4SLinus Torvalds nfs4_unlock_state(); 23271da177e4SLinus Torvalds return status; 23281da177e4SLinus Torvalds } 23291da177e4SLinus Torvalds 233032513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23311da177e4SLinus Torvalds { 233232513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 233332513b40SJ. Bruce Fields } 233432513b40SJ. Bruce Fields 233532513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 233632513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 233732513b40SJ. Bruce Fields { 23381da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23391da177e4SLinus Torvalds 23408b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23411da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23428beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23438beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23441da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 234547f9940cSMeelap Shah fp->fi_had_conflict = false; 2346acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2347f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2348f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 234947cee541SPavel Emelyanov spin_lock(&recall_lock); 235047cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 235147cee541SPavel Emelyanov spin_unlock(&recall_lock); 23521da177e4SLinus Torvalds } 23531da177e4SLinus Torvalds 23541da177e4SLinus Torvalds static void 2355e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2356e60d4398SNeilBrown { 2357e60d4398SNeilBrown if (*slab == NULL) 2358e60d4398SNeilBrown return; 23591a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2360e60d4398SNeilBrown *slab = NULL; 2361e60d4398SNeilBrown } 2362e60d4398SNeilBrown 2363e8ff2a84SJ. Bruce Fields void 2364e60d4398SNeilBrown nfsd4_free_slabs(void) 2365e60d4398SNeilBrown { 2366fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2367fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2368e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23695ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23705b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2371e60d4398SNeilBrown } 23721da177e4SLinus Torvalds 237372083396SBryan Schumaker int 23741da177e4SLinus Torvalds nfsd4_init_slabs(void) 23751da177e4SLinus Torvalds { 2376fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2377fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2378fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2379fe0750e5SJ. Bruce Fields goto out_nomem; 2380fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2381fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2382fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2383e60d4398SNeilBrown goto out_nomem; 2384e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 238520c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2386e60d4398SNeilBrown if (file_slab == NULL) 2387e60d4398SNeilBrown goto out_nomem; 23885ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2389dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23905ac049acSNeilBrown if (stateid_slab == NULL) 23915ac049acSNeilBrown goto out_nomem; 23925b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 239320c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23945b2d21c1SNeilBrown if (deleg_slab == NULL) 23955b2d21c1SNeilBrown goto out_nomem; 2396e60d4398SNeilBrown return 0; 2397e60d4398SNeilBrown out_nomem: 2398e60d4398SNeilBrown nfsd4_free_slabs(); 23991da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 24001da177e4SLinus Torvalds return -ENOMEM; 24011da177e4SLinus Torvalds } 24021da177e4SLinus Torvalds 2403fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 24041da177e4SLinus Torvalds { 2405fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2406fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2407fe0750e5SJ. Bruce Fields } 2408fe0750e5SJ. Bruce Fields 2409fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2410fe0750e5SJ. Bruce Fields { 2411fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2412fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 24131da177e4SLinus Torvalds } 24141da177e4SLinus Torvalds 2415ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2416ff194bd9SJ. Bruce Fields { 2417ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2418ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2419ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2420ff194bd9SJ. Bruce Fields } 2421ff194bd9SJ. Bruce Fields 2422fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 24231da177e4SLinus Torvalds { 24241da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24251da177e4SLinus Torvalds 2426fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2427ff194bd9SJ. Bruce Fields if (!sop) 2428ff194bd9SJ. Bruce Fields return NULL; 2429ff194bd9SJ. Bruce Fields 2430ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2431ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2432fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2433ff194bd9SJ. Bruce Fields return NULL; 2434ff194bd9SJ. Bruce Fields } 24351da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2436ff194bd9SJ. Bruce Fields 2437ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2438ff194bd9SJ. Bruce Fields sop->so_client = clp; 2439ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24401da177e4SLinus Torvalds return sop; 24411da177e4SLinus Torvalds } 2442ff194bd9SJ. Bruce Fields 2443fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2444ff194bd9SJ. Bruce Fields { 244516bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2446fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds 2449fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24501da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2451fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24521da177e4SLinus Torvalds 2453fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2454fe0750e5SJ. Bruce Fields if (!oo) 24551da177e4SLinus Torvalds return NULL; 2456fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2457fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2458d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2459fe0750e5SJ. Bruce Fields oo->oo_time = 0; 246038c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2461fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2462fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2463fe0750e5SJ. Bruce Fields return oo; 24641da177e4SLinus Torvalds } 24651da177e4SLinus Torvalds 2466996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2467fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2468d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24691da177e4SLinus Torvalds 2470996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2471ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2472fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24738beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2474fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 247513cd2184SNeilBrown get_nfs4_file(fp); 24761da177e4SLinus Torvalds stp->st_file = fp; 24771da177e4SLinus Torvalds stp->st_access_bmap = 0; 24781da177e4SLinus Torvalds stp->st_deny_bmap = 0; 247982c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2480ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24814c4cd222SNeilBrown stp->st_openstp = NULL; 24821da177e4SLinus Torvalds } 24831da177e4SLinus Torvalds 24841da177e4SLinus Torvalds static void 2485fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24861da177e4SLinus Torvalds { 2487fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24881da177e4SLinus Torvalds 2489fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2490fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds static int 2494599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2495599e0a22SJ. Bruce Fields clientid_t *clid) 2496599e0a22SJ. Bruce Fields { 2497599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2498599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2499599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 25001da177e4SLinus Torvalds } 25011da177e4SLinus Torvalds 2502fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 25031da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 25041da177e4SLinus Torvalds { 2505a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2506a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 25071da177e4SLinus Torvalds 250816bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 250916bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 251016bfdaafSJ. Bruce Fields continue; 2511a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2512a50d2ad1SJ. Bruce Fields oo = openowner(so); 2513a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2514a50d2ad1SJ. Bruce Fields return oo; 2515a50d2ad1SJ. Bruce Fields } 25161da177e4SLinus Torvalds } 25171da177e4SLinus Torvalds return NULL; 25181da177e4SLinus Torvalds } 25191da177e4SLinus Torvalds 25201da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25211da177e4SLinus Torvalds static struct nfs4_file * 25221da177e4SLinus Torvalds find_file(struct inode *ino) 25231da177e4SLinus Torvalds { 25241da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25251da177e4SLinus Torvalds struct nfs4_file *fp; 25261da177e4SLinus Torvalds 25278b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25281da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 252913cd2184SNeilBrown if (fp->fi_inode == ino) { 253013cd2184SNeilBrown get_nfs4_file(fp); 25318b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25321da177e4SLinus Torvalds return fp; 25331da177e4SLinus Torvalds } 253413cd2184SNeilBrown } 25358b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25361da177e4SLinus Torvalds return NULL; 25371da177e4SLinus Torvalds } 25381da177e4SLinus Torvalds 25394f83aa30SJ. Bruce Fields /* 25401da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25411da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25421da177e4SLinus Torvalds */ 2543b37ad28bSAl Viro static __be32 25441da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25451da177e4SLinus Torvalds { 25461da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25471da177e4SLinus Torvalds struct nfs4_file *fp; 2548dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2549b37ad28bSAl Viro __be32 ret; 25501da177e4SLinus Torvalds 25511da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds fp = find_file(ino); 255413cd2184SNeilBrown if (!fp) 255513cd2184SNeilBrown return nfs_ok; 2556b700949bSNeilBrown ret = nfserr_locked; 25571da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25588beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2559ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2560ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 256113cd2184SNeilBrown goto out; 25621da177e4SLinus Torvalds } 256313cd2184SNeilBrown ret = nfs_ok; 256413cd2184SNeilBrown out: 256513cd2184SNeilBrown put_nfs4_file(fp); 256613cd2184SNeilBrown return ret; 25671da177e4SLinus Torvalds } 25681da177e4SLinus Torvalds 25696b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25701da177e4SLinus Torvalds { 25711da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25721da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25731da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25741da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25751da177e4SLinus Torvalds * it's safe to take a reference: */ 25761da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25771da177e4SLinus Torvalds 25781da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25791da177e4SLinus Torvalds 2580460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25811da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25821da177e4SLinus Torvalds 25836b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25846b57d9c8SJ. Bruce Fields } 25856b57d9c8SJ. Bruce Fields 2586acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25876b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25886b57d9c8SJ. Bruce Fields { 2589acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2590acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25916b57d9c8SJ. Bruce Fields 2592acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2593acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2594acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25950272e1fdSJ. Bruce Fields /* 25960272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2597acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25986b57d9c8SJ. Bruce Fields * in time: 25990272e1fdSJ. Bruce Fields */ 26000272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 26011da177e4SLinus Torvalds 26025d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2603acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2604acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 26055d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 26065d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 26071da177e4SLinus Torvalds } 26081da177e4SLinus Torvalds 26091da177e4SLinus Torvalds static 26101da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 26111da177e4SLinus Torvalds { 26121da177e4SLinus Torvalds if (arg & F_UNLCK) 26131da177e4SLinus Torvalds return lease_modify(onlist, arg); 26141da177e4SLinus Torvalds else 26151da177e4SLinus Torvalds return -EAGAIN; 26161da177e4SLinus Torvalds } 26171da177e4SLinus Torvalds 26187b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 26198fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26208fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26211da177e4SLinus Torvalds }; 26221da177e4SLinus Torvalds 26237a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26247a8711c9SJ. Bruce Fields { 26257a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26267a8711c9SJ. Bruce Fields return nfs_ok; 26277a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26287a8711c9SJ. Bruce Fields return nfserr_replay_me; 26297a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26307a8711c9SJ. Bruce Fields return nfs_ok; 26317a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26327a8711c9SJ. Bruce Fields } 26331da177e4SLinus Torvalds 2634b37ad28bSAl Viro __be32 26356668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26366668958fSAndy Adamson struct nfsd4_open *open) 26371da177e4SLinus Torvalds { 26381da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26391da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26401da177e4SLinus Torvalds unsigned int strhashval; 2641fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26424cdc951bSJ. Bruce Fields __be32 status; 26431da177e4SLinus Torvalds 26441da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 26451da177e4SLinus Torvalds return nfserr_stale_clientid; 264632513b40SJ. Bruce Fields /* 264732513b40SJ. Bruce Fields * In case we need it later, after we've already created the 264832513b40SJ. Bruce Fields * file and don't want to risk a further failure: 264932513b40SJ. Bruce Fields */ 265032513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 265132513b40SJ. Bruce Fields if (open->op_file == NULL) 265232513b40SJ. Bruce Fields return nfserr_jukebox; 26531da177e4SLinus Torvalds 265416bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2655fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2656fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2657fe0750e5SJ. Bruce Fields if (!oo) { 26580f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26590f442aa2SJ. Bruce Fields if (clp == NULL) 26600f442aa2SJ. Bruce Fields return nfserr_expired; 2661bcf130f9SJ. Bruce Fields goto new_owner; 26620f442aa2SJ. Bruce Fields } 2663dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26640f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2665fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2666fe0750e5SJ. Bruce Fields release_openowner(oo); 2667fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2668bcf130f9SJ. Bruce Fields goto new_owner; 26690f442aa2SJ. Bruce Fields } 26704cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26714cdc951bSJ. Bruce Fields if (status) 26724cdc951bSJ. Bruce Fields return status; 26734cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26744cdc951bSJ. Bruce Fields goto alloc_stateid; 2675bcf130f9SJ. Bruce Fields new_owner: 2676fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2677fe0750e5SJ. Bruce Fields if (oo == NULL) 26783e772463SJ. Bruce Fields return nfserr_jukebox; 2679fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26804cdc951bSJ. Bruce Fields alloc_stateid: 26814cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26824cdc951bSJ. Bruce Fields if (!open->op_stp) 26834cdc951bSJ. Bruce Fields return nfserr_jukebox; 26840f442aa2SJ. Bruce Fields return nfs_ok; 26851da177e4SLinus Torvalds } 26861da177e4SLinus Torvalds 2687b37ad28bSAl Viro static inline __be32 26884a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26894a6e43e6SNeilBrown { 26904a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26914a6e43e6SNeilBrown return nfserr_openmode; 26924a6e43e6SNeilBrown else 26934a6e43e6SNeilBrown return nfs_ok; 26944a6e43e6SNeilBrown } 26954a6e43e6SNeilBrown 2696c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 269724a0111eSJ. Bruce Fields { 269824a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 269924a0111eSJ. Bruce Fields } 270024a0111eSJ. Bruce Fields 270138c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2702f459e453SJ. Bruce Fields { 2703f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2704f459e453SJ. Bruce Fields 270538c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2706f459e453SJ. Bruce Fields if (!ret) 2707f459e453SJ. Bruce Fields return NULL; 2708f459e453SJ. Bruce Fields return delegstateid(ret); 2709f459e453SJ. Bruce Fields } 2710f459e453SJ. Bruce Fields 27118b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 27128b289b2cSJ. Bruce Fields { 27138b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 27148b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 27158b289b2cSJ. Bruce Fields } 27168b289b2cSJ. Bruce Fields 2717b37ad28bSAl Viro static __be32 271838c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2719567d9829SNeilBrown struct nfs4_delegation **dp) 2720567d9829SNeilBrown { 2721567d9829SNeilBrown int flags; 2722b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2723567d9829SNeilBrown 272438c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2725567d9829SNeilBrown if (*dp == NULL) 2726c44c5eebSNeilBrown goto out; 272724a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2728567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2729567d9829SNeilBrown if (status) 2730567d9829SNeilBrown *dp = NULL; 2731c44c5eebSNeilBrown out: 27328b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2733c44c5eebSNeilBrown return nfs_ok; 2734c44c5eebSNeilBrown if (status) 2735c44c5eebSNeilBrown return status; 2736dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2737c44c5eebSNeilBrown return nfs_ok; 2738567d9829SNeilBrown } 2739567d9829SNeilBrown 2740b37ad28bSAl Viro static __be32 2741dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27421da177e4SLinus Torvalds { 2743dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2744fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27451da177e4SLinus Torvalds 27468beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27471da177e4SLinus Torvalds /* ignore lock owners */ 27481da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27491da177e4SLinus Torvalds continue; 27501da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2751fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27521da177e4SLinus Torvalds *stpp = local; 27531da177e4SLinus Torvalds /* check for conflicting share reservations */ 27541da177e4SLinus Torvalds if (!test_share(local, open)) 275577eaae8dSJ. Bruce Fields return nfserr_share_denied; 27561da177e4SLinus Torvalds } 275777eaae8dSJ. Bruce Fields return nfs_ok; 27581da177e4SLinus Torvalds } 27591da177e4SLinus Torvalds 2760996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2761996e0938SJ. Bruce Fields { 2762996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27635ac049acSNeilBrown } 27645ac049acSNeilBrown 276521fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 276621fb4016SJ. Bruce Fields { 276721fb4016SJ. Bruce Fields int flags = 0; 276821fb4016SJ. Bruce Fields 276921fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 277021fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 277121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 277221fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 277321fb4016SJ. Bruce Fields return flags; 277421fb4016SJ. Bruce Fields } 277521fb4016SJ. Bruce Fields 27760c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27770c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2778f9d7562fSJ. Bruce Fields { 2779f9d7562fSJ. Bruce Fields __be32 status; 27800c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27810c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27820c12eaffSCasey Bodley 2783f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2784f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2785f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2786f9d7562fSJ. Bruce Fields if (status) 2787f9d7562fSJ. Bruce Fields return status; 2788f9d7562fSJ. Bruce Fields } 2789f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2790f9d7562fSJ. Bruce Fields 2791f9d7562fSJ. Bruce Fields return nfs_ok; 2792f9d7562fSJ. Bruce Fields } 2793f9d7562fSJ. Bruce Fields 2794b37ad28bSAl Viro static inline __be32 27951da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27961da177e4SLinus Torvalds struct nfsd4_open *open) 27971da177e4SLinus Torvalds { 27981da177e4SLinus Torvalds struct iattr iattr = { 27991da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 28001da177e4SLinus Torvalds .ia_size = 0, 28011da177e4SLinus Torvalds }; 28021da177e4SLinus Torvalds if (!open->op_truncate) 28031da177e4SLinus Torvalds return 0; 28041da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 28059246585aSAl Viro return nfserr_inval; 28061da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 28071da177e4SLinus Torvalds } 28081da177e4SLinus Torvalds 2809b37ad28bSAl Viro static __be32 2810dcef0413SJ. 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) 28111da177e4SLinus Torvalds { 2812b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 28137d947842SJ. Bruce Fields bool new_access; 2814b37ad28bSAl Viro __be32 status; 28151da177e4SLinus Torvalds 281682c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2817f9d7562fSJ. Bruce Fields if (new_access) { 28180c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2819f9d7562fSJ. Bruce Fields if (status) 2820f9d7562fSJ. Bruce Fields return status; 28216c26d08fSJ. Bruce Fields } 28221da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28231da177e4SLinus Torvalds if (status) { 2824f9d7562fSJ. Bruce Fields if (new_access) { 2825f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2826f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2827f9d7562fSJ. Bruce Fields } 28281da177e4SLinus Torvalds return status; 28291da177e4SLinus Torvalds } 28301da177e4SLinus Torvalds /* remember the open */ 283182c5ff1bSJeff Layton set_access(op_share_access, stp); 2832ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28331da177e4SLinus Torvalds 28341da177e4SLinus Torvalds return nfs_ok; 28351da177e4SLinus Torvalds } 28361da177e4SLinus Torvalds 28371da177e4SLinus Torvalds 28381da177e4SLinus Torvalds static void 28391255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28401da177e4SLinus Torvalds { 2841dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28421da177e4SLinus Torvalds } 28431da177e4SLinus Torvalds 284414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 284514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 284614a24e99SJ. Bruce Fields { 284714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 284814a24e99SJ. Bruce Fields return true; 284914a24e99SJ. Bruce Fields /* 285014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 285114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 285214a24e99SJ. Bruce Fields * until we hear otherwise: 285314a24e99SJ. Bruce Fields */ 285414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 285514a24e99SJ. Bruce Fields } 285614a24e99SJ. Bruce Fields 285722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 285822d38c4cSJ. Bruce Fields { 285922d38c4cSJ. Bruce Fields struct file_lock *fl; 286022d38c4cSJ. Bruce Fields 286122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 286222d38c4cSJ. Bruce Fields if (!fl) 286322d38c4cSJ. Bruce Fields return NULL; 286422d38c4cSJ. Bruce Fields locks_init_lock(fl); 286522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 286622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 286722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 286822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2869acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 287022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 287122d38c4cSJ. Bruce Fields return fl; 287222d38c4cSJ. Bruce Fields } 287322d38c4cSJ. Bruce Fields 2874edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2875edab9782SJ. Bruce Fields { 2876acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2877edab9782SJ. Bruce Fields struct file_lock *fl; 2878edab9782SJ. Bruce Fields int status; 2879edab9782SJ. Bruce Fields 2880edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2881edab9782SJ. Bruce Fields if (!fl) 2882edab9782SJ. Bruce Fields return -ENOMEM; 2883acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28842a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2885acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2886edab9782SJ. Bruce Fields if (status) { 2887acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2888edab9782SJ. Bruce Fields locks_free_lock(fl); 2889edab9782SJ. Bruce Fields return -ENOMEM; 2890edab9782SJ. Bruce Fields } 2891acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2892acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2893acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2894acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2895acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2896acfdf5c3SJ. Bruce Fields return 0; 2897acfdf5c3SJ. Bruce Fields } 2898acfdf5c3SJ. Bruce Fields 2899acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2900acfdf5c3SJ. Bruce Fields { 2901acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2902acfdf5c3SJ. Bruce Fields 2903acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2904acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2905acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2906acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2907acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2908acfdf5c3SJ. Bruce Fields return -EAGAIN; 2909acfdf5c3SJ. Bruce Fields } 2910acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2911acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2912acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 29132a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2914edab9782SJ. Bruce Fields return 0; 2915edab9782SJ. Bruce Fields } 2916edab9782SJ. Bruce Fields 29174aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 29184aa8913cSBenny Halevy { 29194aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29204aa8913cSBenny Halevy if (status == -EAGAIN) 29214aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29224aa8913cSBenny Halevy else { 29234aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29244aa8913cSBenny Halevy switch (open->op_deleg_want) { 29254aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29264aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29274aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29284aa8913cSBenny Halevy break; 29294aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29304aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29314aa8913cSBenny Halevy break; 29324aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29334aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29344aa8913cSBenny Halevy } 29354aa8913cSBenny Halevy } 29364aa8913cSBenny Halevy } 29374aa8913cSBenny Halevy 29381da177e4SLinus Torvalds /* 29391da177e4SLinus Torvalds * Attempt to hand out a delegation. 29401da177e4SLinus Torvalds */ 29411da177e4SLinus Torvalds static void 2942dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29431da177e4SLinus Torvalds { 29441da177e4SLinus Torvalds struct nfs4_delegation *dp; 2945fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 294614a24e99SJ. Bruce Fields int cb_up; 2947d24433cdSBenny Halevy int status = 0, flag = 0; 29481da177e4SLinus Torvalds 2949fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29501da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29517b190fecSNeilBrown open->op_recall = 0; 29527b190fecSNeilBrown switch (open->op_claim_type) { 29537b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29542bf23875SJ. Bruce Fields if (!cb_up) 29557b190fecSNeilBrown open->op_recall = 1; 29567b190fecSNeilBrown flag = open->op_delegate_type; 29577b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29581da177e4SLinus Torvalds goto out; 29597b190fecSNeilBrown break; 29607b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29617b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29627b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2963af558e33SJ. Bruce Fields if (locks_in_grace()) 29647b190fecSNeilBrown goto out; 2965dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29667b190fecSNeilBrown goto out; 29671da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29681da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29691da177e4SLinus Torvalds else 29701da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29717b190fecSNeilBrown break; 29727b190fecSNeilBrown default: 29737b190fecSNeilBrown goto out; 29747b190fecSNeilBrown } 29751da177e4SLinus Torvalds 2976fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2977dd239cc0SJ. Bruce Fields if (dp == NULL) 2978dd239cc0SJ. Bruce Fields goto out_no_deleg; 2979acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2980edab9782SJ. Bruce Fields if (status) 2981dd239cc0SJ. Bruce Fields goto out_free; 29821da177e4SLinus Torvalds 2983d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29841da177e4SLinus Torvalds 29858c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2986d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29871da177e4SLinus Torvalds out: 29881da177e4SLinus Torvalds open->op_delegate_type = flag; 2989d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2990d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2991d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2992d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2993d24433cdSBenny Halevy 29944aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29954aa8913cSBenny Halevy if (open->op_deleg_want) 29964aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2997d24433cdSBenny Halevy } 2998dd239cc0SJ. Bruce Fields return; 2999dd239cc0SJ. Bruce Fields out_free: 3000acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 3001dd239cc0SJ. Bruce Fields out_no_deleg: 3002dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 3003dd239cc0SJ. Bruce Fields goto out; 30041da177e4SLinus Torvalds } 30051da177e4SLinus Torvalds 3006e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 3007e27f49c3SBenny Halevy struct nfs4_delegation *dp) 3008e27f49c3SBenny Halevy { 3009e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3010e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3011e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3012e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3013e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3014e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3015e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3016e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3017e27f49c3SBenny Halevy } 3018e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 3019e27f49c3SBenny Halevy * it already has, therefore we don't return 3020e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3021e27f49c3SBenny Halevy */ 3022e27f49c3SBenny Halevy } 3023e27f49c3SBenny Halevy 30241da177e4SLinus Torvalds /* 30251da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30261da177e4SLinus Torvalds */ 3027b37ad28bSAl Viro __be32 30281da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30291da177e4SLinus Torvalds { 30306668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 303138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30321da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30331da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3034dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3035567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3036b37ad28bSAl Viro __be32 status; 30371da177e4SLinus Torvalds 30381da177e4SLinus Torvalds /* 30391da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30401da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30411da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30421da177e4SLinus Torvalds */ 30431da177e4SLinus Torvalds fp = find_file(ino); 30441da177e4SLinus Torvalds if (fp) { 30451da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30461da177e4SLinus Torvalds goto out; 304738c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3048c44c5eebSNeilBrown if (status) 3049c44c5eebSNeilBrown goto out; 30501da177e4SLinus Torvalds } else { 3051c44c5eebSNeilBrown status = nfserr_bad_stateid; 30528b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3053c44c5eebSNeilBrown goto out; 30543e772463SJ. Bruce Fields status = nfserr_jukebox; 305532513b40SJ. Bruce Fields fp = open->op_file; 305632513b40SJ. Bruce Fields open->op_file = NULL; 305732513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30581da177e4SLinus Torvalds } 30591da177e4SLinus Torvalds 30601da177e4SLinus Torvalds /* 30611da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30621da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30631da177e4SLinus Torvalds */ 30641da177e4SLinus Torvalds if (stp) { 30651da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3066f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30671da177e4SLinus Torvalds if (status) 30681da177e4SLinus Torvalds goto out; 30691da177e4SLinus Torvalds } else { 30704cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3071567d9829SNeilBrown if (status) 30721da177e4SLinus Torvalds goto out; 30734cdc951bSJ. Bruce Fields stp = open->op_stp; 30744cdc951bSJ. Bruce Fields open->op_stp = NULL; 3075996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30761da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30771da177e4SLinus Torvalds if (status) { 30782283963fSJ. Bruce Fields release_open_stateid(stp); 30791da177e4SLinus Torvalds goto out; 30801da177e4SLinus Torvalds } 30811da177e4SLinus Torvalds } 3082dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3083dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30841da177e4SLinus Torvalds 3085d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3086dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30876668958fSAndy Adamson 3088d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3089d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3090d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3091d24433cdSBenny Halevy goto nodeleg; 3092d24433cdSBenny Halevy } 3093d24433cdSBenny Halevy } 3094d24433cdSBenny Halevy 30951da177e4SLinus Torvalds /* 30961da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30971da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30981da177e4SLinus Torvalds */ 30991da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3100d24433cdSBenny Halevy nodeleg: 31011da177e4SLinus Torvalds status = nfs_ok; 31021da177e4SLinus Torvalds 31038c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3104dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 31051da177e4SLinus Torvalds out: 3106d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3107d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3108e27f49c3SBenny Halevy open->op_deleg_want) 3109e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3110d24433cdSBenny Halevy 311113cd2184SNeilBrown if (fp) 311213cd2184SNeilBrown put_nfs4_file(fp); 311337515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 31141255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 31151da177e4SLinus Torvalds /* 31161da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 31171da177e4SLinus Torvalds */ 31181da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3119dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 31206668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31211da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31221da177e4SLinus Torvalds 31231da177e4SLinus Torvalds return status; 31241da177e4SLinus Torvalds } 31251da177e4SLinus Torvalds 3126d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3127d29b20cdSJ. Bruce Fields { 3128d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3129d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3130d29b20cdSJ. Bruce Fields 3131d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3132d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3133d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3134d29b20cdSJ. Bruce Fields if (status) { 3135d29b20cdSJ. Bruce Fields release_openowner(oo); 3136d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3137d29b20cdSJ. Bruce Fields } else 3138d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3139d29b20cdSJ. Bruce Fields } 3140d29b20cdSJ. Bruce Fields } 314132513b40SJ. Bruce Fields if (open->op_file) 314232513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31434cdc951bSJ. Bruce Fields if (open->op_stp) 31444cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3145d29b20cdSJ. Bruce Fields } 3146d29b20cdSJ. Bruce Fields 3147b37ad28bSAl Viro __be32 3148b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3149b591480bSJ.Bruce Fields clientid_t *clid) 31501da177e4SLinus Torvalds { 31511da177e4SLinus Torvalds struct nfs4_client *clp; 3152b37ad28bSAl Viro __be32 status; 31531da177e4SLinus Torvalds 31541da177e4SLinus Torvalds nfs4_lock_state(); 31551da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31561da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31571da177e4SLinus Torvalds status = nfserr_stale_clientid; 31581da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31591da177e4SLinus Torvalds goto out; 31601da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31611da177e4SLinus Torvalds status = nfserr_expired; 31621da177e4SLinus Torvalds if (clp == NULL) { 31631da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31641da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31651da177e4SLinus Torvalds goto out; 31661da177e4SLinus Torvalds } 31671da177e4SLinus Torvalds status = nfserr_cb_path_down; 3168ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 316977a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31701da177e4SLinus Torvalds goto out; 31711da177e4SLinus Torvalds status = nfs_ok; 31721da177e4SLinus Torvalds out: 31731da177e4SLinus Torvalds nfs4_unlock_state(); 31741da177e4SLinus Torvalds return status; 31751da177e4SLinus Torvalds } 31761da177e4SLinus Torvalds 3177c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3178af558e33SJ. Bruce Fields }; 3179af558e33SJ. Bruce Fields 318033dcc481SJeff Layton static bool grace_ended; 318133dcc481SJeff Layton 3182a76b4319SNeilBrown static void 3183af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3184a76b4319SNeilBrown { 318533dcc481SJeff Layton /* do nothing if grace period already ended */ 318633dcc481SJeff Layton if (grace_ended) 318733dcc481SJeff Layton return; 318833dcc481SJeff Layton 3189a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 319033dcc481SJeff Layton grace_ended = true; 31912a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3192af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3193e46b498cSJ. Bruce Fields /* 3194e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3195e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3196e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3197e46b498cSJ. Bruce Fields */ 3198e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3199a76b4319SNeilBrown } 3200a76b4319SNeilBrown 3201fd39ca9aSNeilBrown static time_t 32021da177e4SLinus Torvalds nfs4_laundromat(void) 32031da177e4SLinus Torvalds { 32041da177e4SLinus Torvalds struct nfs4_client *clp; 3205fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 32061da177e4SLinus Torvalds struct nfs4_delegation *dp; 32071da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3208cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3209cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3210cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 32111da177e4SLinus Torvalds 32121da177e4SLinus Torvalds nfs4_lock_state(); 32131da177e4SLinus Torvalds 32141da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3215af558e33SJ. Bruce Fields nfsd4_end_grace(); 321636acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 321736acb66bSBenny Halevy spin_lock(&client_lock); 32181da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 32191da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 32201da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 32211da177e4SLinus Torvalds t = clp->cl_time - cutoff; 32221da177e4SLinus Torvalds if (clientid_val > t) 32231da177e4SLinus Torvalds clientid_val = t; 32241da177e4SLinus Torvalds break; 32251da177e4SLinus Torvalds } 3226d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3227d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3228d7682988SBenny Halevy clp->cl_clientid.cl_id); 3229d7682988SBenny Halevy continue; 3230d7682988SBenny Halevy } 3231d7682988SBenny Halevy unhash_client_locked(clp); 3232d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 323336acb66bSBenny Halevy } 323436acb66bSBenny Halevy spin_unlock(&client_lock); 323536acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 323636acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32371da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32381da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32392a4317c5SJeff Layton nfsd4_client_record_remove(clp); 32401da177e4SLinus Torvalds expire_client(clp); 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds spin_lock(&recall_lock); 32431da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32441da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32451da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32461da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32471da177e4SLinus Torvalds if (test_val > u) 32481da177e4SLinus Torvalds test_val = u; 32491da177e4SLinus Torvalds break; 32501da177e4SLinus Torvalds } 32511da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32521da177e4SLinus Torvalds } 32531da177e4SLinus Torvalds spin_unlock(&recall_lock); 32541da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32551da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32561da177e4SLinus Torvalds unhash_delegation(dp); 32571da177e4SLinus Torvalds } 3258cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32591da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3260fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3261fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3262fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32631da177e4SLinus Torvalds if (test_val > u) 32641da177e4SLinus Torvalds test_val = u; 32651da177e4SLinus Torvalds break; 32661da177e4SLinus Torvalds } 3267fe0750e5SJ. Bruce Fields release_openowner(oo); 32681da177e4SLinus Torvalds } 32691da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32701da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32711da177e4SLinus Torvalds nfs4_unlock_state(); 32721da177e4SLinus Torvalds return clientid_val; 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds 3275a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3276a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3277a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3278a254b246SHarvey Harrison 3279a254b246SHarvey Harrison static void 3280c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32811da177e4SLinus Torvalds { 32821da177e4SLinus Torvalds time_t t; 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds t = nfs4_laundromat(); 32851da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 328658da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32871da177e4SLinus Torvalds } 32881da177e4SLinus Torvalds 3289f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3290f8816512SNeilBrown { 3291f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3292f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3293f7a4d872SJ. Bruce Fields return nfs_ok; 32941da177e4SLinus Torvalds } 32951da177e4SLinus Torvalds 32961da177e4SLinus Torvalds static int 32971da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32981da177e4SLinus Torvalds { 3299d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3300e4e83ea4SJ. Bruce Fields return 0; 33018c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 33028c10cbdbSBenny Halevy STATEID_VAL(stateid)); 33031da177e4SLinus Torvalds return 1; 33041da177e4SLinus Torvalds } 33051da177e4SLinus Torvalds 33061da177e4SLinus Torvalds static inline int 330782c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 33081da177e4SLinus Torvalds { 330982c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 331082c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 331182c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 33121da177e4SLinus Torvalds } 33131da177e4SLinus Torvalds 33141da177e4SLinus Torvalds static inline int 331582c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 33161da177e4SLinus Torvalds { 331782c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 331882c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 33191da177e4SLinus Torvalds } 33201da177e4SLinus Torvalds 33211da177e4SLinus Torvalds static 3322dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 33231da177e4SLinus Torvalds { 3324b37ad28bSAl Viro __be32 status = nfserr_openmode; 33251da177e4SLinus Torvalds 332602921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 332702921914SJ. Bruce Fields if (stp->st_openstp) 332802921914SJ. Bruce Fields stp = stp->st_openstp; 332982c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33301da177e4SLinus Torvalds goto out; 333182c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33321da177e4SLinus Torvalds goto out; 33331da177e4SLinus Torvalds status = nfs_ok; 33341da177e4SLinus Torvalds out: 33351da177e4SLinus Torvalds return status; 33361da177e4SLinus Torvalds } 33371da177e4SLinus Torvalds 3338b37ad28bSAl Viro static inline __be32 33391da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 33401da177e4SLinus Torvalds { 3341203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33421da177e4SLinus Torvalds return nfs_ok; 3343af558e33SJ. Bruce Fields else if (locks_in_grace()) { 334425985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33451da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33461da177e4SLinus Torvalds return nfserr_grace; 33471da177e4SLinus Torvalds } else if (flags & WR_STATE) 33481da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33491da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33501da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33511da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33521da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33531da177e4SLinus Torvalds } 33541da177e4SLinus Torvalds 33551da177e4SLinus Torvalds /* 33561da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33571da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33581da177e4SLinus Torvalds */ 33591da177e4SLinus Torvalds static inline int 336018f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33611da177e4SLinus Torvalds { 3362203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33631da177e4SLinus Torvalds } 33641da177e4SLinus Torvalds 336581b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 336681b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 336781b82965SJ. Bruce Fields { 336881b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 336981b82965SJ. Bruce Fields } 337081b82965SJ. Bruce Fields 337157b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33720836f587SJ. Bruce Fields { 33736668958fSAndy Adamson /* 33746668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33756668958fSAndy Adamson * when it is zero. 33766668958fSAndy Adamson */ 337728dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 337881b82965SJ. Bruce Fields return nfs_ok; 337981b82965SJ. Bruce Fields 338081b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 338181b82965SJ. Bruce Fields return nfs_ok; 33826668958fSAndy Adamson 33830836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 338481b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33850836f587SJ. Bruce Fields return nfserr_bad_stateid; 33860836f587SJ. Bruce Fields /* 338781b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 338881b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 338981b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 339081b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 339181b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 339281b82965SJ. Bruce Fields * but better performance may result in retrying IO that 339381b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 339481b82965SJ. Bruce Fields * reordered in flight: 33950836f587SJ. Bruce Fields */ 33960836f587SJ. Bruce Fields return nfserr_old_stateid; 33970836f587SJ. Bruce Fields } 33980836f587SJ. Bruce Fields 339938c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 340017456804SBryan Schumaker { 340197b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 340297b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 340397b7e3b6SJ. Bruce Fields __be32 status; 340417456804SBryan Schumaker 340517456804SBryan Schumaker if (STALE_STATEID(stateid)) 340697b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 340717456804SBryan Schumaker 340838c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 340997b7e3b6SJ. Bruce Fields if (!s) 341097b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 341136279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 341217456804SBryan Schumaker if (status) 341317456804SBryan Schumaker return status; 341497b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 341597b7e3b6SJ. Bruce Fields return nfs_ok; 341697b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 341797b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3418dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 341997b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 342097b7e3b6SJ. Bruce Fields return nfs_ok; 342117456804SBryan Schumaker } 342217456804SBryan Schumaker 342338c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 342438c2f4b1SJ. Bruce Fields { 342538c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 342638c2f4b1SJ. Bruce Fields 342738c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 342838c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 342938c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 343038c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 343138c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 343238c2f4b1SJ. Bruce Fields if (!cl) 343338c2f4b1SJ. Bruce Fields return nfserr_expired; 343438c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 343538c2f4b1SJ. Bruce Fields if (!*s) 343638c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 343738c2f4b1SJ. Bruce Fields return nfs_ok; 343838c2f4b1SJ. Bruce Fields 343938c2f4b1SJ. Bruce Fields } 344038c2f4b1SJ. Bruce Fields 34411da177e4SLinus Torvalds /* 34421da177e4SLinus Torvalds * Checks for stateid operations 34431da177e4SLinus Torvalds */ 3444b37ad28bSAl Viro __be32 3445dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3446dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34471da177e4SLinus Torvalds { 344869064a27SJ. Bruce Fields struct nfs4_stid *s; 3449dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34501da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3451dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34521da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3453b37ad28bSAl Viro __be32 status; 34541da177e4SLinus Torvalds 34551da177e4SLinus Torvalds if (filpp) 34561da177e4SLinus Torvalds *filpp = NULL; 34571da177e4SLinus Torvalds 345818f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34591da177e4SLinus Torvalds return nfserr_grace; 34601da177e4SLinus Torvalds 34611da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34621da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34631da177e4SLinus Torvalds 346438c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 346538c2f4b1SJ. Bruce Fields if (status) 346638c2f4b1SJ. Bruce Fields return status; 346769064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34680c2a498fSJ. Bruce Fields if (status) 34690c2a498fSJ. Bruce Fields goto out; 3470f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3471f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 347269064a27SJ. Bruce Fields dp = delegstateid(s); 3473dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3474dc9bf700SJ. Bruce Fields if (status) 3475dc9bf700SJ. Bruce Fields goto out; 347643b0178eSDan Carpenter if (filpp) { 3477acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3478f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 347943b0178eSDan Carpenter } 3480f7a4d872SJ. Bruce Fields break; 3481f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3482f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 348369064a27SJ. Bruce Fields stp = openlockstateid(s); 3484f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3485f7a4d872SJ. Bruce Fields if (status) 34861da177e4SLinus Torvalds goto out; 3487fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3488dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34891da177e4SLinus Torvalds goto out; 3490a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3491a4455be0SJ. Bruce Fields if (status) 34921da177e4SLinus Torvalds goto out; 3493f9d7562fSJ. Bruce Fields if (filpp) { 3494f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3495f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3496f9d7562fSJ. Bruce Fields else 3497f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3498f9d7562fSJ. Bruce Fields } 3499f7a4d872SJ. Bruce Fields break; 3500f7a4d872SJ. Bruce Fields default: 3501f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 35021da177e4SLinus Torvalds } 35031da177e4SLinus Torvalds status = nfs_ok; 35041da177e4SLinus Torvalds out: 35051da177e4SLinus Torvalds return status; 35061da177e4SLinus Torvalds } 35071da177e4SLinus Torvalds 3508e1ca12dfSBryan Schumaker static __be32 3509dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3510e1ca12dfSBryan Schumaker { 3511fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3512e1ca12dfSBryan Schumaker return nfserr_locks_held; 3513e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3514e1ca12dfSBryan Schumaker return nfs_ok; 3515e1ca12dfSBryan Schumaker } 3516e1ca12dfSBryan Schumaker 3517e1ca12dfSBryan Schumaker /* 351817456804SBryan Schumaker * Test if the stateid is valid 351917456804SBryan Schumaker */ 352017456804SBryan Schumaker __be32 352117456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 352217456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 352317456804SBryan Schumaker { 352403cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 352503cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 352603cfb420SBryan Schumaker 352703cfb420SBryan Schumaker nfs4_lock_state(); 352803cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 352903cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 353003cfb420SBryan Schumaker nfs4_unlock_state(); 353103cfb420SBryan Schumaker 353217456804SBryan Schumaker return nfs_ok; 353317456804SBryan Schumaker } 353417456804SBryan Schumaker 3535e1ca12dfSBryan Schumaker __be32 3536e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3537e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3538e1ca12dfSBryan Schumaker { 3539e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35402da1cec7SJ. Bruce Fields struct nfs4_stid *s; 354138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35422da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3543e1ca12dfSBryan Schumaker 3544e1ca12dfSBryan Schumaker nfs4_lock_state(); 354538c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35462da1cec7SJ. Bruce Fields if (!s) 3547e1ca12dfSBryan Schumaker goto out; 35482da1cec7SJ. Bruce Fields switch (s->sc_type) { 35492da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3550e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3551e1ca12dfSBryan Schumaker goto out; 35522da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35532da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35542da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35552da1cec7SJ. Bruce Fields if (ret) 3556e1ca12dfSBryan Schumaker goto out; 35572da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35582da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35592da1cec7SJ. Bruce Fields else 35602da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3561f7a4d872SJ. Bruce Fields break; 3562f7a4d872SJ. Bruce Fields default: 3563f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3564e1ca12dfSBryan Schumaker } 3565e1ca12dfSBryan Schumaker out: 3566e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3567e1ca12dfSBryan Schumaker return ret; 3568e1ca12dfSBryan Schumaker } 3569e1ca12dfSBryan Schumaker 35704c4cd222SNeilBrown static inline int 35714c4cd222SNeilBrown setlkflg (int type) 35724c4cd222SNeilBrown { 35734c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35744c4cd222SNeilBrown RD_STATE : WR_STATE; 35754c4cd222SNeilBrown } 35761da177e4SLinus Torvalds 3577dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3578c0a5d93eSJ. Bruce Fields { 3579c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3580c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3581c0a5d93eSJ. Bruce Fields __be32 status; 3582c0a5d93eSJ. Bruce Fields 3583c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3584c0a5d93eSJ. Bruce Fields if (status) 3585c0a5d93eSJ. Bruce Fields return status; 3586f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3587f7a4d872SJ. Bruce Fields /* 3588f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3589f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3590f7a4d872SJ. Bruce Fields */ 3591f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3592f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3593f7a4d872SJ. Bruce Fields if (status) 3594f7a4d872SJ. Bruce Fields return status; 3595f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3596c0a5d93eSJ. Bruce Fields } 3597c0a5d93eSJ. Bruce Fields 35981da177e4SLinus Torvalds /* 35991da177e4SLinus Torvalds * Checks for sequence id mutating operations. 36001da177e4SLinus Torvalds */ 3601b37ad28bSAl Viro static __be32 3602dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 36032288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3604dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 36051da177e4SLinus Torvalds { 36060836f587SJ. Bruce Fields __be32 status; 360738c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 36081da177e4SLinus Torvalds 36098c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 36108c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 36111da177e4SLinus Torvalds 36121da177e4SLinus Torvalds *stpp = NULL; 361338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3614c0a5d93eSJ. Bruce Fields if (status) 3615c0a5d93eSJ. Bruce Fields return status; 361638c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3617c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 36181da177e4SLinus Torvalds 3619c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36201da177e4SLinus Torvalds } 36211da177e4SLinus Torvalds 3622dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3623c0a5d93eSJ. Bruce Fields { 3624c0a5d93eSJ. Bruce Fields __be32 status; 3625c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36261da177e4SLinus Torvalds 3627c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36282288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 36290836f587SJ. Bruce Fields if (status) 36300836f587SJ. Bruce Fields return status; 3631c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3632dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3633c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36343a4f98bbSNeilBrown return nfs_ok; 36351da177e4SLinus Torvalds } 36361da177e4SLinus Torvalds 3637b37ad28bSAl Viro __be32 3638ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3639a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36401da177e4SLinus Torvalds { 3641b37ad28bSAl Viro __be32 status; 3642fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3643dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36441da177e4SLinus Torvalds 36451da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3646ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3647ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36481da177e4SLinus Torvalds 3649ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3650a8cddc5dSJ. Bruce Fields if (status) 3651a8cddc5dSJ. Bruce Fields return status; 36521da177e4SLinus Torvalds 36531da177e4SLinus Torvalds nfs4_lock_state(); 36541da177e4SLinus Torvalds 36559072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3656ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36572288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36589072d5c6SJ. Bruce Fields if (status) 36591da177e4SLinus Torvalds goto out; 3660fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 366168b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3662dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 366368b66e82SJ. Bruce Fields goto out; 3664dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3665dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3666dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36678c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3668dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3669c7b9a459SNeilBrown 36702a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 367168b66e82SJ. Bruce Fields status = nfs_ok; 36721da177e4SLinus Torvalds out: 36735ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36741da177e4SLinus Torvalds nfs4_unlock_state(); 36751da177e4SLinus Torvalds return status; 36761da177e4SLinus Torvalds } 36771da177e4SLinus Torvalds 36786409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36791da177e4SLinus Torvalds { 368082c5ff1bSJeff Layton if (!test_access(access, stp)) 36816409a5a6SJ. Bruce Fields return; 36826409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 368382c5ff1bSJeff Layton clear_access(access, stp); 3684f197c271SJ. Bruce Fields } 36856409a5a6SJ. Bruce Fields 36866409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36876409a5a6SJ. Bruce Fields { 36886409a5a6SJ. Bruce Fields switch (to_access) { 36896409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36906409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36916409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36926409a5a6SJ. Bruce Fields break; 36936409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36946409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36956409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36966409a5a6SJ. Bruce Fields break; 36976409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36986409a5a6SJ. Bruce Fields break; 36996409a5a6SJ. Bruce Fields default: 37006409a5a6SJ. Bruce Fields BUG(); 37011da177e4SLinus Torvalds } 37021da177e4SLinus Torvalds } 37031da177e4SLinus Torvalds 37041da177e4SLinus Torvalds static void 3705ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 37061da177e4SLinus Torvalds { 37071da177e4SLinus Torvalds int i; 37081da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 37091da177e4SLinus Torvalds if ((i & deny) != i) 3710ce0fc43cSJeff Layton clear_deny(i, stp); 37111da177e4SLinus Torvalds } 37121da177e4SLinus Torvalds } 37131da177e4SLinus Torvalds 3714b37ad28bSAl Viro __be32 3715ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3716ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3717a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 37181da177e4SLinus Torvalds { 3719b37ad28bSAl Viro __be32 status; 3720dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37211da177e4SLinus Torvalds 37221da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3723ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3724ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37251da177e4SLinus Torvalds 3726c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37272c8bd7e0SBenny Halevy if (od->od_deleg_want) 37282c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37292c8bd7e0SBenny Halevy od->od_deleg_want); 37301da177e4SLinus Torvalds 37311da177e4SLinus Torvalds nfs4_lock_state(); 3732c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3733c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37349072d5c6SJ. Bruce Fields if (status) 37351da177e4SLinus Torvalds goto out; 37361da177e4SLinus Torvalds status = nfserr_inval; 373782c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37381da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37391da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37401da177e4SLinus Torvalds goto out; 37411da177e4SLinus Torvalds } 3742ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37431da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37441da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37451da177e4SLinus Torvalds goto out; 37461da177e4SLinus Torvalds } 37476409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37481da177e4SLinus Torvalds 3749ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37501da177e4SLinus Torvalds 3751dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3752dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37531da177e4SLinus Torvalds status = nfs_ok; 37541da177e4SLinus Torvalds out: 37555ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37561da177e4SLinus Torvalds nfs4_unlock_state(); 37571da177e4SLinus Torvalds return status; 37581da177e4SLinus Torvalds } 37591da177e4SLinus Torvalds 376038c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 376138c387b5SJ. Bruce Fields { 376238c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 376338c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 376438c387b5SJ. Bruce Fields 376538c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 376638c387b5SJ. Bruce Fields return; 376738c387b5SJ. Bruce Fields oo = openowner(so); 376838c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 376938c387b5SJ. Bruce Fields if (!s) 377038c387b5SJ. Bruce Fields return; 377138c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 377238c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 377338c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 377438c387b5SJ. Bruce Fields return; 377538c387b5SJ. Bruce Fields } 377638c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3777f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3778f7a4d872SJ. Bruce Fields } 3779f7a4d872SJ. Bruce Fields 3780f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3781f7a4d872SJ. Bruce Fields { 3782f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3783f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 378438c387b5SJ. Bruce Fields } 378538c387b5SJ. Bruce Fields 37861da177e4SLinus Torvalds /* 37871da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37881da177e4SLinus Torvalds */ 3789b37ad28bSAl Viro __be32 3790ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3791a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37921da177e4SLinus Torvalds { 3793b37ad28bSAl Viro __be32 status; 3794fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3795dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37961da177e4SLinus Torvalds 37971da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3798ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3799ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 38001da177e4SLinus Torvalds 38011da177e4SLinus Torvalds nfs4_lock_state(); 3802f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3803f7a4d872SJ. Bruce Fields &close->cl_stateid, 3804f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3805f7a4d872SJ. Bruce Fields &stp); 38069072d5c6SJ. Bruce Fields if (status) 38071da177e4SLinus Torvalds goto out; 3808fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 38091da177e4SLinus Torvalds status = nfs_ok; 3810dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3811dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 38121da177e4SLinus Torvalds 3813f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 381438c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 381504ef5954SJ. Bruce Fields 381604ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 381704ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 381804ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 381904ef5954SJ. Bruce Fields */ 3820fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3821fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 38221da177e4SLinus Torvalds out: 38235ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38241da177e4SLinus Torvalds nfs4_unlock_state(); 38251da177e4SLinus Torvalds return status; 38261da177e4SLinus Torvalds } 38271da177e4SLinus Torvalds 3828b37ad28bSAl Viro __be32 3829ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3830ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38311da177e4SLinus Torvalds { 3832203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3833203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 383438c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3835203a8c8eSJ. Bruce Fields struct inode *inode; 3836b37ad28bSAl Viro __be32 status; 38371da177e4SLinus Torvalds 3838ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3839203a8c8eSJ. Bruce Fields return status; 3840203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38411da177e4SLinus Torvalds 38421da177e4SLinus Torvalds nfs4_lock_state(); 384338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 384438c2f4b1SJ. Bruce Fields if (status) 3845203a8c8eSJ. Bruce Fields goto out; 384638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3847d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3848203a8c8eSJ. Bruce Fields if (status) 3849203a8c8eSJ. Bruce Fields goto out; 3850203a8c8eSJ. Bruce Fields 3851203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38521da177e4SLinus Torvalds out: 3853203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3854203a8c8eSJ. Bruce Fields 38551da177e4SLinus Torvalds return status; 38561da177e4SLinus Torvalds } 38571da177e4SLinus Torvalds 38581da177e4SLinus Torvalds 38591da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38601da177e4SLinus Torvalds 3861009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3862009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3863009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38641da177e4SLinus Torvalds 386587df4de8SBenny Halevy static inline u64 386687df4de8SBenny Halevy end_offset(u64 start, u64 len) 386787df4de8SBenny Halevy { 386887df4de8SBenny Halevy u64 end; 386987df4de8SBenny Halevy 387087df4de8SBenny Halevy end = start + len; 387187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 387287df4de8SBenny Halevy } 387387df4de8SBenny Halevy 387487df4de8SBenny Halevy /* last octet in a range */ 387587df4de8SBenny Halevy static inline u64 387687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 387787df4de8SBenny Halevy { 387887df4de8SBenny Halevy u64 end; 387987df4de8SBenny Halevy 388087df4de8SBenny Halevy BUG_ON(!len); 388187df4de8SBenny Halevy end = start + len; 388287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 388387df4de8SBenny Halevy } 388487df4de8SBenny Halevy 3885009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38861da177e4SLinus Torvalds { 38871da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38881da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3889009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38901da177e4SLinus Torvalds } 38911da177e4SLinus Torvalds 3892009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38931da177e4SLinus Torvalds 38941da177e4SLinus Torvalds /* 38951da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38961da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38971da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38981da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38991da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 39001da177e4SLinus Torvalds * the VFS, but this is a very deep change! 39011da177e4SLinus Torvalds */ 39021da177e4SLinus Torvalds static inline void 39031da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 39041da177e4SLinus Torvalds { 39051da177e4SLinus Torvalds if (lock->fl_start < 0) 39061da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 39071da177e4SLinus Torvalds if (lock->fl_end < 0) 39081da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 39091da177e4SLinus Torvalds } 39101da177e4SLinus Torvalds 3911d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3912d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 39137b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3914d5b9026aSNeilBrown }; 39151da177e4SLinus Torvalds 39161da177e4SLinus Torvalds static inline void 39171da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 39181da177e4SLinus Torvalds { 3919fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39201da177e4SLinus Torvalds 3921d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3922fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3923fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3924fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39257c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39267c13f344SJ. Bruce Fields /* We just don't care that much */ 39277c13f344SJ. Bruce Fields goto nevermind; 3928fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3929fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3930d5b9026aSNeilBrown } else { 39317c13f344SJ. Bruce Fields nevermind: 39327c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39337c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3934d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3935d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 393887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 393987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39401da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39411da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39421da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39431da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39441da177e4SLinus Torvalds } 39451da177e4SLinus Torvalds 3946b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3947b93d87c1SJ. Bruce Fields { 3948b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3949b93d87c1SJ. Bruce Fields 3950b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3951b93d87c1SJ. Bruce Fields return false; 3952b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3953b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3954b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3955b93d87c1SJ. Bruce Fields } 3956b93d87c1SJ. Bruce Fields 3957fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3958fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39591da177e4SLinus Torvalds struct xdr_netobj *owner) 39601da177e4SLinus Torvalds { 3961009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3962b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39631da177e4SLinus Torvalds 3964009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3965b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3966b93d87c1SJ. Bruce Fields return lo; 39671da177e4SLinus Torvalds } 39681da177e4SLinus Torvalds return NULL; 39691da177e4SLinus Torvalds } 39701da177e4SLinus Torvalds 3971dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3972ff194bd9SJ. Bruce Fields { 3973009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3974009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3975009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3976009673b4SJ. Bruce Fields 397716bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3978009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3979fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3980ff194bd9SJ. Bruce Fields } 3981ff194bd9SJ. Bruce Fields 39821da177e4SLinus Torvalds /* 39831da177e4SLinus Torvalds * Alloc a lock owner structure. 39841da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 398525985edcSLucas De Marchi * occurred. 39861da177e4SLinus Torvalds * 398716bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39881da177e4SLinus Torvalds */ 39891da177e4SLinus Torvalds 3990fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3991dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3992fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39931da177e4SLinus Torvalds 3994fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3995fe0750e5SJ. Bruce Fields if (!lo) 39961da177e4SLinus Torvalds return NULL; 3997fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3998fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3999b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 4000b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 4001fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 4002fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 4003fe0750e5SJ. Bruce Fields return lo; 40041da177e4SLinus Torvalds } 40051da177e4SLinus Torvalds 4006dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 4007dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 40081da177e4SLinus Torvalds { 4009dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 4010d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 40111da177e4SLinus Torvalds 4012996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 40135ac049acSNeilBrown if (stp == NULL) 40146136d2b4SJ. Bruce Fields return NULL; 4015996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 40168beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 4017fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 4018fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 401913cd2184SNeilBrown get_nfs4_file(fp); 40201da177e4SLinus Torvalds stp->st_file = fp; 40210997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40221da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40234c4cd222SNeilBrown stp->st_openstp = open_stp; 40241da177e4SLinus Torvalds return stp; 40251da177e4SLinus Torvalds } 40261da177e4SLinus Torvalds 4027fd39ca9aSNeilBrown static int 40281da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40291da177e4SLinus Torvalds { 403087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40311da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40321da177e4SLinus Torvalds } 40331da177e4SLinus Torvalds 4034dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40350997b173SJ. Bruce Fields { 40360997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40370997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40380997b173SJ. Bruce Fields 403982c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40400997b173SJ. Bruce Fields return; 40410997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 404282c5ff1bSJeff Layton set_access(access, lock_stp); 40430997b173SJ. Bruce Fields } 40440997b173SJ. Bruce Fields 40452355c596SJ. 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) 404664a284d0SJ. Bruce Fields { 404764a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 404864a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 404964a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 405064a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 405164a284d0SJ. Bruce Fields unsigned int strhashval; 405264a284d0SJ. Bruce Fields 405364a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 405464a284d0SJ. Bruce Fields if (lo) { 405564a284d0SJ. Bruce Fields if (!cstate->minorversion) 405664a284d0SJ. Bruce Fields return nfserr_bad_seqid; 405764a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 405864a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 405964a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 406064a284d0SJ. Bruce Fields return nfs_ok; 406164a284d0SJ. Bruce Fields } 406216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 406364a284d0SJ. Bruce Fields &lock->v.new.owner); 406464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 406564a284d0SJ. Bruce Fields if (lo == NULL) 406664a284d0SJ. Bruce Fields return nfserr_jukebox; 406764a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 406864a284d0SJ. Bruce Fields if (*lst == NULL) { 406964a284d0SJ. Bruce Fields release_lockowner(lo); 407064a284d0SJ. Bruce Fields return nfserr_jukebox; 407164a284d0SJ. Bruce Fields } 407264a284d0SJ. Bruce Fields *new = true; 407364a284d0SJ. Bruce Fields return nfs_ok; 407464a284d0SJ. Bruce Fields } 407564a284d0SJ. Bruce Fields 40761da177e4SLinus Torvalds /* 40771da177e4SLinus Torvalds * LOCK operation 40781da177e4SLinus Torvalds */ 4079b37ad28bSAl Viro __be32 4080ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4081a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40821da177e4SLinus Torvalds { 4083fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4084fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4085dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40867d947842SJ. Bruce Fields struct file *filp = NULL; 40871da177e4SLinus Torvalds struct file_lock file_lock; 40888dc7c311SAndy Adamson struct file_lock conflock; 4089b37ad28bSAl Viro __be32 status = 0; 409064a284d0SJ. Bruce Fields bool new_state = false; 4091b34f27aaSJ. Bruce Fields int lkflg; 4092b8dd7b9aSAl Viro int err; 40931da177e4SLinus Torvalds 40941da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40951da177e4SLinus Torvalds (long long) lock->lk_offset, 40961da177e4SLinus Torvalds (long long) lock->lk_length); 40971da177e4SLinus Torvalds 40981da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40991da177e4SLinus Torvalds return nfserr_inval; 41001da177e4SLinus Torvalds 4101ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 41028837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4103a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4104a6f6ef2fSAndy Adamson return status; 4105a6f6ef2fSAndy Adamson } 4106a6f6ef2fSAndy Adamson 41071da177e4SLinus Torvalds nfs4_lock_state(); 41081da177e4SLinus Torvalds 41091da177e4SLinus Torvalds if (lock->lk_is_new) { 41101da177e4SLinus Torvalds /* 41111da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4112893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4113893f8770SNeilBrown * lock stateid. 41141da177e4SLinus Torvalds */ 4115dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 41161da177e4SLinus Torvalds 4117684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4118684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4119684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4120684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4121684e5638SJ. Bruce Fields sizeof(clientid_t)); 4122684e5638SJ. Bruce Fields 41231da177e4SLinus Torvalds status = nfserr_stale_clientid; 4124684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 41251da177e4SLinus Torvalds goto out; 41261da177e4SLinus Torvalds 41271da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4128c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41291da177e4SLinus Torvalds lock->lk_new_open_seqid, 41301da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4131c0a5d93eSJ. Bruce Fields &open_stp); 413237515177SNeilBrown if (status) 41331da177e4SLinus Torvalds goto out; 4134fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4135b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4136684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4137b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4138b34f27aaSJ. Bruce Fields goto out; 413964a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 414064a284d0SJ. Bruce Fields &lock_stp, &new_state); 414164a284d0SJ. Bruce Fields if (status) 41421da177e4SLinus Torvalds goto out; 41431da177e4SLinus Torvalds } else { 41441da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4145dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41461da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41471da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41482288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41491da177e4SLinus Torvalds if (status) 41501da177e4SLinus Torvalds goto out; 415164a284d0SJ. Bruce Fields } 4152fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41531da177e4SLinus Torvalds 4154b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4155b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4156b34f27aaSJ. Bruce Fields if (status) 4157b34f27aaSJ. Bruce Fields goto out; 4158b34f27aaSJ. Bruce Fields 41590dd395dcSNeilBrown status = nfserr_grace; 4160af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41610dd395dcSNeilBrown goto out; 41620dd395dcSNeilBrown status = nfserr_no_grace; 4163af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41640dd395dcSNeilBrown goto out; 41650dd395dcSNeilBrown 41661da177e4SLinus Torvalds locks_init_lock(&file_lock); 41671da177e4SLinus Torvalds switch (lock->lk_type) { 41681da177e4SLinus Torvalds case NFS4_READ_LT: 41691da177e4SLinus Torvalds case NFS4_READW_LT: 4170f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41710997b173SJ. Bruce Fields if (filp) 41720997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41731da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41741da177e4SLinus Torvalds break; 41751da177e4SLinus Torvalds case NFS4_WRITE_LT: 41761da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4177f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41780997b173SJ. Bruce Fields if (filp) 41790997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41801da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41811da177e4SLinus Torvalds break; 41821da177e4SLinus Torvalds default: 41831da177e4SLinus Torvalds status = nfserr_inval; 41841da177e4SLinus Torvalds goto out; 41851da177e4SLinus Torvalds } 4186f9d7562fSJ. Bruce Fields if (!filp) { 4187f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4188f9d7562fSJ. Bruce Fields goto out; 4189f9d7562fSJ. Bruce Fields } 4190b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41911da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41921da177e4SLinus Torvalds file_lock.fl_file = filp; 41931da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4194d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41951da177e4SLinus Torvalds 41961da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 419787df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41981da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41991da177e4SLinus Torvalds 42001da177e4SLinus Torvalds /* 42011da177e4SLinus Torvalds * Try to lock the file in the VFS. 42021da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 42031da177e4SLinus Torvalds */ 42041da177e4SLinus Torvalds 4205529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4206b8dd7b9aSAl Viro switch (-err) { 42071da177e4SLinus Torvalds case 0: /* success! */ 4208dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4209dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 42101da177e4SLinus Torvalds sizeof(stateid_t)); 4211b8dd7b9aSAl Viro status = 0; 4212eb76b3fdSAndy Adamson break; 4213eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4214eb76b3fdSAndy Adamson status = nfserr_denied; 4215eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4216eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4217eb76b3fdSAndy Adamson break; 42181da177e4SLinus Torvalds case (EDEADLK): 42191da177e4SLinus Torvalds status = nfserr_deadlock; 4220eb76b3fdSAndy Adamson break; 42211da177e4SLinus Torvalds default: 4222fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42233e772463SJ. Bruce Fields status = nfserrno(err); 4224eb76b3fdSAndy Adamson break; 42251da177e4SLinus Torvalds } 42261da177e4SLinus Torvalds out: 422764a284d0SJ. Bruce Fields if (status && new_state) 4228f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42295ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42301da177e4SLinus Torvalds nfs4_unlock_state(); 42311da177e4SLinus Torvalds return status; 42321da177e4SLinus Torvalds } 42331da177e4SLinus Torvalds 42341da177e4SLinus Torvalds /* 423555ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 423655ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 423755ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 423855ef1274SJ. Bruce Fields * inode operation.) 423955ef1274SJ. Bruce Fields */ 424055ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 424155ef1274SJ. Bruce Fields { 424255ef1274SJ. Bruce Fields struct file *file; 424355ef1274SJ. Bruce Fields int err; 424455ef1274SJ. Bruce Fields 424555ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 424655ef1274SJ. Bruce Fields if (err) 424755ef1274SJ. Bruce Fields return err; 424855ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 424955ef1274SJ. Bruce Fields nfsd_close(file); 425055ef1274SJ. Bruce Fields return err; 425155ef1274SJ. Bruce Fields } 425255ef1274SJ. Bruce Fields 425355ef1274SJ. Bruce Fields /* 42541da177e4SLinus Torvalds * LOCKT operation 42551da177e4SLinus Torvalds */ 4256b37ad28bSAl Viro __be32 4257ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4258ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42591da177e4SLinus Torvalds { 42601da177e4SLinus Torvalds struct inode *inode; 42611da177e4SLinus Torvalds struct file_lock file_lock; 4262fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4263fd85b817SMarc Eshel int error; 4264b37ad28bSAl Viro __be32 status; 42651da177e4SLinus Torvalds 4266af558e33SJ. Bruce Fields if (locks_in_grace()) 42671da177e4SLinus Torvalds return nfserr_grace; 42681da177e4SLinus Torvalds 42691da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42701da177e4SLinus Torvalds return nfserr_inval; 42711da177e4SLinus Torvalds 42721da177e4SLinus Torvalds nfs4_lock_state(); 42731da177e4SLinus Torvalds 42741da177e4SLinus Torvalds status = nfserr_stale_clientid; 427560adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42761da177e4SLinus Torvalds goto out; 42771da177e4SLinus Torvalds 427875c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42791da177e4SLinus Torvalds goto out; 42801da177e4SLinus Torvalds 4281ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42821da177e4SLinus Torvalds locks_init_lock(&file_lock); 42831da177e4SLinus Torvalds switch (lockt->lt_type) { 42841da177e4SLinus Torvalds case NFS4_READ_LT: 42851da177e4SLinus Torvalds case NFS4_READW_LT: 42861da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42871da177e4SLinus Torvalds break; 42881da177e4SLinus Torvalds case NFS4_WRITE_LT: 42891da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42901da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42911da177e4SLinus Torvalds break; 42921da177e4SLinus Torvalds default: 42932fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42941da177e4SLinus Torvalds status = nfserr_inval; 42951da177e4SLinus Torvalds goto out; 42961da177e4SLinus Torvalds } 42971da177e4SLinus Torvalds 4298fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4299fe0750e5SJ. Bruce Fields if (lo) 4300fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 43011da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43021da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 43031da177e4SLinus Torvalds 43041da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 430587df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 43061da177e4SLinus Torvalds 43071da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43081da177e4SLinus Torvalds 43091da177e4SLinus Torvalds status = nfs_ok; 431055ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4311fd85b817SMarc Eshel if (error) { 4312fd85b817SMarc Eshel status = nfserrno(error); 4313fd85b817SMarc Eshel goto out; 4314fd85b817SMarc Eshel } 43159d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 43161da177e4SLinus Torvalds status = nfserr_denied; 43179d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 43181da177e4SLinus Torvalds } 43191da177e4SLinus Torvalds out: 43201da177e4SLinus Torvalds nfs4_unlock_state(); 43211da177e4SLinus Torvalds return status; 43221da177e4SLinus Torvalds } 43231da177e4SLinus Torvalds 4324b37ad28bSAl Viro __be32 4325ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4326a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43271da177e4SLinus Torvalds { 4328dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43291da177e4SLinus Torvalds struct file *filp = NULL; 43301da177e4SLinus Torvalds struct file_lock file_lock; 4331b37ad28bSAl Viro __be32 status; 4332b8dd7b9aSAl Viro int err; 43331da177e4SLinus Torvalds 43341da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43351da177e4SLinus Torvalds (long long) locku->lu_offset, 43361da177e4SLinus Torvalds (long long) locku->lu_length); 43371da177e4SLinus Torvalds 43381da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43391da177e4SLinus Torvalds return nfserr_inval; 43401da177e4SLinus Torvalds 43411da177e4SLinus Torvalds nfs4_lock_state(); 43421da177e4SLinus Torvalds 43439072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43442288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43459072d5c6SJ. Bruce Fields if (status) 43461da177e4SLinus Torvalds goto out; 4347f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4348f9d7562fSJ. Bruce Fields if (!filp) { 4349f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4350f9d7562fSJ. Bruce Fields goto out; 4351f9d7562fSJ. Bruce Fields } 43521da177e4SLinus Torvalds BUG_ON(!filp); 43531da177e4SLinus Torvalds locks_init_lock(&file_lock); 43541da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4355fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43561da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43571da177e4SLinus Torvalds file_lock.fl_file = filp; 43581da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4359d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43601da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43611da177e4SLinus Torvalds 436287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43631da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43641da177e4SLinus Torvalds 43651da177e4SLinus Torvalds /* 43661da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43671da177e4SLinus Torvalds */ 4368fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4369b8dd7b9aSAl Viro if (err) { 4370fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43711da177e4SLinus Torvalds goto out_nfserr; 43721da177e4SLinus Torvalds } 43731da177e4SLinus Torvalds /* 43741da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43751da177e4SLinus Torvalds */ 4376dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4377dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43781da177e4SLinus Torvalds 43791da177e4SLinus Torvalds out: 438071c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43811da177e4SLinus Torvalds nfs4_unlock_state(); 43821da177e4SLinus Torvalds return status; 43831da177e4SLinus Torvalds 43841da177e4SLinus Torvalds out_nfserr: 4385b8dd7b9aSAl Viro status = nfserrno(err); 43861da177e4SLinus Torvalds goto out; 43871da177e4SLinus Torvalds } 43881da177e4SLinus Torvalds 43891da177e4SLinus Torvalds /* 43901da177e4SLinus Torvalds * returns 43911da177e4SLinus Torvalds * 1: locks held by lockowner 43921da177e4SLinus Torvalds * 0: no locks held by lockowner 43931da177e4SLinus Torvalds */ 43941da177e4SLinus Torvalds static int 4395fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43961da177e4SLinus Torvalds { 43971da177e4SLinus Torvalds struct file_lock **flpp; 4398f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43991da177e4SLinus Torvalds int status = 0; 44001da177e4SLinus Torvalds 4401b89f4321SArnd Bergmann lock_flocks(); 44021da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4403796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 44041da177e4SLinus Torvalds status = 1; 44051da177e4SLinus Torvalds goto out; 44061da177e4SLinus Torvalds } 4407796dadfdSJ. Bruce Fields } 44081da177e4SLinus Torvalds out: 4409b89f4321SArnd Bergmann unlock_flocks(); 44101da177e4SLinus Torvalds return status; 44111da177e4SLinus Torvalds } 44121da177e4SLinus Torvalds 4413b37ad28bSAl Viro __be32 4414b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4415b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4416b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 44171da177e4SLinus Torvalds { 44181da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 44193e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4420fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4421dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44221da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44233e9e3dbeSNeilBrown struct list_head matches; 442416bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4425b37ad28bSAl Viro __be32 status; 44261da177e4SLinus Torvalds 44271da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44281da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44291da177e4SLinus Torvalds 44301da177e4SLinus Torvalds /* XXX check for lease expiration */ 44311da177e4SLinus Torvalds 44321da177e4SLinus Torvalds status = nfserr_stale_clientid; 4433849823c5SNeil Brown if (STALE_CLIENTID(clid)) 44341da177e4SLinus Torvalds return status; 44351da177e4SLinus Torvalds 44361da177e4SLinus Torvalds nfs4_lock_state(); 44371da177e4SLinus Torvalds 44381da177e4SLinus Torvalds status = nfserr_locks_held; 44393e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 444006f1f864SJ. Bruce Fields 444116bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 444216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 444316bfdaafSJ. Bruce Fields continue; 4444599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44453e9e3dbeSNeilBrown continue; 44463e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4447ea1da636SNeilBrown st_perstateowner) { 4448fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4449fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44501da177e4SLinus Torvalds goto out; 4451fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44521da177e4SLinus Torvalds } 44533e9e3dbeSNeilBrown } 44543e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44553e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44563e9e3dbeSNeilBrown * have been checked. */ 44571da177e4SLinus Torvalds status = nfs_ok; 44580fa822e4SNeilBrown while (!list_empty(&matches)) { 4459fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4460fe0750e5SJ. Bruce Fields lo_list); 44610fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44620fa822e4SNeilBrown * for openowners. */ 4463fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4464fe0750e5SJ. Bruce Fields release_lockowner(lo); 44651da177e4SLinus Torvalds } 44661da177e4SLinus Torvalds out: 44671da177e4SLinus Torvalds nfs4_unlock_state(); 44681da177e4SLinus Torvalds return status; 44691da177e4SLinus Torvalds } 44701da177e4SLinus Torvalds 44711da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4472a55370a3SNeilBrown alloc_reclaim(void) 44731da177e4SLinus Torvalds { 4474a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44751da177e4SLinus Torvalds } 44761da177e4SLinus Torvalds 4477c7b9a459SNeilBrown int 4478a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4479c7b9a459SNeilBrown { 4480c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4481c7b9a459SNeilBrown struct nfs4_client *clp; 4482c7b9a459SNeilBrown 4483e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4484393d8ed8SJ. Bruce Fields if (!clp) 4485393d8ed8SJ. Bruce Fields return 0; 4486a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4487c7b9a459SNeilBrown } 4488c7b9a459SNeilBrown 44891da177e4SLinus Torvalds /* 44901da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44911da177e4SLinus Torvalds */ 4492190e4fbfSNeilBrown int 4493190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44941da177e4SLinus Torvalds { 44951da177e4SLinus Torvalds unsigned int strhashval; 44961da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44971da177e4SLinus Torvalds 4498a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4499a55370a3SNeilBrown crp = alloc_reclaim(); 45001da177e4SLinus Torvalds if (!crp) 45011da177e4SLinus Torvalds return 0; 4502a55370a3SNeilBrown strhashval = clientstr_hashval(name); 45031da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 45041da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4505a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 45061da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 45071da177e4SLinus Torvalds return 1; 45081da177e4SLinus Torvalds } 45091da177e4SLinus Torvalds 45102a4317c5SJeff Layton void 45111da177e4SLinus Torvalds nfs4_release_reclaim(void) 45121da177e4SLinus Torvalds { 45131da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45141da177e4SLinus Torvalds int i; 45151da177e4SLinus Torvalds 45161da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45171da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 45181da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 45191da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 45201da177e4SLinus Torvalds list_del(&crp->cr_strhash); 45211da177e4SLinus Torvalds kfree(crp); 45221da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 45231da177e4SLinus Torvalds } 45241da177e4SLinus Torvalds } 45251da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 45261da177e4SLinus Torvalds } 45271da177e4SLinus Torvalds 45281da177e4SLinus Torvalds /* 45291da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45302a4317c5SJeff Layton struct nfs4_client_reclaim * 4531a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 45321da177e4SLinus Torvalds { 45331da177e4SLinus Torvalds unsigned int strhashval; 45341da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45351da177e4SLinus Torvalds 4536a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4537a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4538a55370a3SNeilBrown clp->cl_recdir); 45391da177e4SLinus Torvalds 45401da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4541a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45421da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4543a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45441da177e4SLinus Torvalds return crp; 45451da177e4SLinus Torvalds } 45461da177e4SLinus Torvalds } 45471da177e4SLinus Torvalds return NULL; 45481da177e4SLinus Torvalds } 45491da177e4SLinus Torvalds 45501da177e4SLinus Torvalds /* 45511da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45521da177e4SLinus Torvalds */ 4553b37ad28bSAl Viro __be32 45541da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45551da177e4SLinus Torvalds { 4556a52d726bSJeff Layton struct nfs4_client *clp; 4557a52d726bSJeff Layton 4558a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4559a52d726bSJeff Layton clp = find_confirmed_client(clid); 4560a52d726bSJeff Layton if (clp == NULL) 4561a52d726bSJeff Layton return nfserr_reclaim_bad; 4562a52d726bSJeff Layton 4563a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45641da177e4SLinus Torvalds } 45651da177e4SLinus Torvalds 456665178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 456765178db4SBryan Schumaker 456865178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 456965178db4SBryan Schumaker { 457065178db4SBryan Schumaker struct nfs4_client *clp, *next; 457165178db4SBryan Schumaker int count = 0; 457265178db4SBryan Schumaker 457365178db4SBryan Schumaker nfs4_lock_state(); 457465178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45752a4317c5SJeff Layton nfsd4_client_record_remove(clp); 457665178db4SBryan Schumaker expire_client(clp); 457765178db4SBryan Schumaker if (++count == num) 457865178db4SBryan Schumaker break; 457965178db4SBryan Schumaker } 458065178db4SBryan Schumaker nfs4_unlock_state(); 458165178db4SBryan Schumaker 458265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 458365178db4SBryan Schumaker } 458465178db4SBryan Schumaker 458565178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 458665178db4SBryan Schumaker { 458765178db4SBryan Schumaker release_lockowner(lockowner(sop)); 458865178db4SBryan Schumaker } 458965178db4SBryan Schumaker 459065178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 459165178db4SBryan Schumaker { 459265178db4SBryan Schumaker release_openowner(openowner(sop)); 459365178db4SBryan Schumaker } 459465178db4SBryan Schumaker 4595353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 459665178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 459765178db4SBryan Schumaker { 459865178db4SBryan Schumaker int i, count = 0; 459965178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 460065178db4SBryan Schumaker 460116bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 460216bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 460316bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 460416bfdaafSJ. Bruce Fields continue; 460565178db4SBryan Schumaker release_sop(sop); 460665178db4SBryan Schumaker if (++count == num) 460765178db4SBryan Schumaker return count; 460865178db4SBryan Schumaker } 460965178db4SBryan Schumaker } 461065178db4SBryan Schumaker return count; 461165178db4SBryan Schumaker } 461265178db4SBryan Schumaker 461365178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 461465178db4SBryan Schumaker { 461565178db4SBryan Schumaker int count; 461665178db4SBryan Schumaker 461765178db4SBryan Schumaker nfs4_lock_state(); 461816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 461965178db4SBryan Schumaker nfs4_unlock_state(); 462065178db4SBryan Schumaker 462165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 462265178db4SBryan Schumaker } 462365178db4SBryan Schumaker 462465178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 462565178db4SBryan Schumaker { 462665178db4SBryan Schumaker int count; 462765178db4SBryan Schumaker 462865178db4SBryan Schumaker nfs4_lock_state(); 462916bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 463065178db4SBryan Schumaker nfs4_unlock_state(); 463165178db4SBryan Schumaker 463265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 463365178db4SBryan Schumaker } 463465178db4SBryan Schumaker 463565178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 463665178db4SBryan Schumaker { 463765178db4SBryan Schumaker int i, count = 0; 46382d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46392d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 464065178db4SBryan Schumaker 464165178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46422d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46432d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 464465178db4SBryan Schumaker deleg_func(dp); 464565178db4SBryan Schumaker if (++count == num) 464665178db4SBryan Schumaker return count; 464765178db4SBryan Schumaker } 464865178db4SBryan Schumaker } 464965178db4SBryan Schumaker } 46502d3475c0SBryan Schumaker 465165178db4SBryan Schumaker return count; 465265178db4SBryan Schumaker } 465365178db4SBryan Schumaker 465465178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 465565178db4SBryan Schumaker { 465665178db4SBryan Schumaker unsigned int count; 465765178db4SBryan Schumaker 465865178db4SBryan Schumaker nfs4_lock_state(); 465965178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 466065178db4SBryan Schumaker nfs4_unlock_state(); 466165178db4SBryan Schumaker 466265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 466365178db4SBryan Schumaker } 466465178db4SBryan Schumaker 466565178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 466665178db4SBryan Schumaker { 466765178db4SBryan Schumaker unsigned int count; 466865178db4SBryan Schumaker 466965178db4SBryan Schumaker nfs4_lock_state(); 467065178db4SBryan Schumaker spin_lock(&recall_lock); 467165178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 467265178db4SBryan Schumaker spin_unlock(&recall_lock); 467365178db4SBryan Schumaker nfs4_unlock_state(); 467465178db4SBryan Schumaker 467565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 467665178db4SBryan Schumaker } 467765178db4SBryan Schumaker 467865178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 467965178db4SBryan Schumaker 4680ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46811da177e4SLinus Torvalds 468272083396SBryan Schumaker void 4683ac4d8ff2SNeilBrown nfs4_state_init(void) 46841da177e4SLinus Torvalds { 468572083396SBryan Schumaker int i; 46861da177e4SLinus Torvalds 46871da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46881da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46891da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46901da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46911da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 469202cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46931da177e4SLinus Torvalds } 46945282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46955282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46961da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46971da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46981da177e4SLinus Torvalds } 469916bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 470016bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 47011da177e4SLinus Torvalds } 4702009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4703009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 47041da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 47051da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 47061da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4707ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4708ac4d8ff2SNeilBrown } 4709ac4d8ff2SNeilBrown 4710c2f1a551SMeelap Shah /* 4711c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4712c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4713c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4714c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4715c2f1a551SMeelap Shah * 4716c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4717c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4718c2f1a551SMeelap Shah */ 4719c2f1a551SMeelap Shah static void 4720c2f1a551SMeelap Shah set_max_delegations(void) 4721c2f1a551SMeelap Shah { 4722c2f1a551SMeelap Shah /* 4723c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4724c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4725c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4726c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4727c2f1a551SMeelap Shah */ 4728c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4729c2f1a551SMeelap Shah } 4730c2f1a551SMeelap Shah 4731ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4732ac4d8ff2SNeilBrown 4733a6d6b781SJeff Layton int 4734a6d6b781SJeff Layton nfs4_state_start(void) 4735ac4d8ff2SNeilBrown { 4736b5a1a81eSJ. Bruce Fields int ret; 4737b5a1a81eSJ. Bruce Fields 47382a4317c5SJeff Layton /* 47392a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47402a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47412a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47422a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47432a4317c5SJeff Layton * basis. 47442a4317c5SJeff Layton */ 47452a4317c5SJeff Layton get_net(&init_net); 47462a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 47471da177e4SLinus Torvalds boot_time = get_seconds(); 4748af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 474933dcc481SJeff Layton grace_ended = false; 47509a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4751e46b498cSJ. Bruce Fields nfsd4_grace); 4752b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4753a6d6b781SJeff Layton if (ret) { 4754a6d6b781SJeff Layton ret = -ENOMEM; 4755a6d6b781SJeff Layton goto out_recovery; 4756a6d6b781SJeff Layton } 475758da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4758a6d6b781SJeff Layton if (laundry_wq == NULL) { 4759a6d6b781SJeff Layton ret = -ENOMEM; 4760a6d6b781SJeff Layton goto out_recovery; 4761a6d6b781SJeff Layton } 4762b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4763b5a1a81eSJ. Bruce Fields if (ret) 4764b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4765e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4766c2f1a551SMeelap Shah set_max_delegations(); 4767b5a1a81eSJ. Bruce Fields return 0; 4768b5a1a81eSJ. Bruce Fields out_free_laundry: 4769b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4770a6d6b781SJeff Layton out_recovery: 47712a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47722a4317c5SJeff Layton put_net(&init_net); 4773b5a1a81eSJ. Bruce Fields return ret; 47741da177e4SLinus Torvalds } 47751da177e4SLinus Torvalds 47761da177e4SLinus Torvalds static void 47771da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47781da177e4SLinus Torvalds { 47791da177e4SLinus Torvalds int i; 47801da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47811da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47821da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47831da177e4SLinus Torvalds 47841da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47851da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47861da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47871da177e4SLinus Torvalds expire_client(clp); 47881da177e4SLinus Torvalds } 47891da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47901da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47911da177e4SLinus Torvalds expire_client(clp); 47921da177e4SLinus Torvalds } 47931da177e4SLinus Torvalds } 47941da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47951da177e4SLinus Torvalds spin_lock(&recall_lock); 47961da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47971da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47981da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47991da177e4SLinus Torvalds } 48001da177e4SLinus Torvalds spin_unlock(&recall_lock); 48011da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 48021da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 48031da177e4SLinus Torvalds unhash_delegation(dp); 48041da177e4SLinus Torvalds } 48051da177e4SLinus Torvalds 48062a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 48072a4317c5SJeff Layton put_net(&init_net); 48081da177e4SLinus Torvalds } 48091da177e4SLinus Torvalds 48101da177e4SLinus Torvalds void 48111da177e4SLinus Torvalds nfs4_state_shutdown(void) 48121da177e4SLinus Torvalds { 4813afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 48145e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 48152c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 48161da177e4SLinus Torvalds nfs4_lock_state(); 48171da177e4SLinus Torvalds __nfs4_state_shutdown(); 48181da177e4SLinus Torvalds nfs4_unlock_state(); 4819c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 48201da177e4SLinus Torvalds } 48218b70484cSTigran Mkrtchyan 48228b70484cSTigran Mkrtchyan static void 48238b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48248b70484cSTigran Mkrtchyan { 482537c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 482637c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 48278b70484cSTigran Mkrtchyan } 48288b70484cSTigran Mkrtchyan 48298b70484cSTigran Mkrtchyan static void 48308b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48318b70484cSTigran Mkrtchyan { 483237c593c5STigran Mkrtchyan if (cstate->minorversion) { 483337c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 483437c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 483537c593c5STigran Mkrtchyan } 483637c593c5STigran Mkrtchyan } 483737c593c5STigran Mkrtchyan 483837c593c5STigran Mkrtchyan void 483937c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 484037c593c5STigran Mkrtchyan { 484137c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48428b70484cSTigran Mkrtchyan } 48438b70484cSTigran Mkrtchyan 484462cd4a59STigran Mkrtchyan /* 484562cd4a59STigran Mkrtchyan * functions to set current state id 484662cd4a59STigran Mkrtchyan */ 48478b70484cSTigran Mkrtchyan void 48489428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48499428fe1aSTigran Mkrtchyan { 48509428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48519428fe1aSTigran Mkrtchyan } 48529428fe1aSTigran Mkrtchyan 48539428fe1aSTigran Mkrtchyan void 48548b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48558b70484cSTigran Mkrtchyan { 48568b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48578b70484cSTigran Mkrtchyan } 48588b70484cSTigran Mkrtchyan 48598b70484cSTigran Mkrtchyan void 486062cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 486162cd4a59STigran Mkrtchyan { 486262cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 486362cd4a59STigran Mkrtchyan } 486462cd4a59STigran Mkrtchyan 486562cd4a59STigran Mkrtchyan void 486662cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 486762cd4a59STigran Mkrtchyan { 486862cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 486962cd4a59STigran Mkrtchyan } 487062cd4a59STigran Mkrtchyan 487162cd4a59STigran Mkrtchyan /* 487262cd4a59STigran Mkrtchyan * functions to consume current state id 487362cd4a59STigran Mkrtchyan */ 48741e97b519STigran Mkrtchyan 48751e97b519STigran Mkrtchyan void 48769428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48779428fe1aSTigran Mkrtchyan { 48789428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48799428fe1aSTigran Mkrtchyan } 48809428fe1aSTigran Mkrtchyan 48819428fe1aSTigran Mkrtchyan void 48829428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48839428fe1aSTigran Mkrtchyan { 48849428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48859428fe1aSTigran Mkrtchyan } 48869428fe1aSTigran Mkrtchyan 48879428fe1aSTigran Mkrtchyan void 48881e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48891e97b519STigran Mkrtchyan { 48901e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48911e97b519STigran Mkrtchyan } 48921e97b519STigran Mkrtchyan 48931e97b519STigran Mkrtchyan void 48941e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48951e97b519STigran Mkrtchyan { 48961e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48971e97b519STigran Mkrtchyan } 48981e97b519STigran Mkrtchyan 489962cd4a59STigran Mkrtchyan void 49008b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 49018b70484cSTigran Mkrtchyan { 49028b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 49038b70484cSTigran Mkrtchyan } 49048b70484cSTigran Mkrtchyan 49058b70484cSTigran Mkrtchyan void 490662cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 49078b70484cSTigran Mkrtchyan { 490862cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 49098b70484cSTigran Mkrtchyan } 491030813e27STigran Mkrtchyan 491130813e27STigran Mkrtchyan void 491230813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 491330813e27STigran Mkrtchyan { 491430813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 491530813e27STigran Mkrtchyan } 491630813e27STigran Mkrtchyan 491730813e27STigran Mkrtchyan void 491830813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 491930813e27STigran Mkrtchyan { 492030813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 492130813e27STigran Mkrtchyan } 4922