11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 45bfa4b365SJ. Bruce Fields #include "current_stateid.h" 461da177e4SLinus Torvalds 471da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 481da177e4SLinus Torvalds 491da177e4SLinus Torvalds /* Globals */ 50cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 51efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 52fd39ca9aSNeilBrown static time_t boot_time; 53f32f3c2dSJ. Bruce Fields 54f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 55f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 56f32f3c2dSJ. Bruce Fields .si_generation = ~0, 57f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 58f32f3c2dSJ. Bruce Fields }; 59f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 60f32f3c2dSJ. Bruce Fields /* all fields zero */ 61f32f3c2dSJ. Bruce Fields }; 6219ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6319ff0f28STigran Mkrtchyan .si_generation = 1, 6419ff0f28STigran Mkrtchyan }; 65f32f3c2dSJ. Bruce Fields 66ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 67fd39ca9aSNeilBrown 68f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 69f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7019ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* forward declarations */ 73fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 741da177e4SLinus Torvalds 758b671b80SJ. Bruce Fields /* Locking: */ 768b671b80SJ. Bruce Fields 778b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 78353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 791da177e4SLinus Torvalds 808b671b80SJ. Bruce Fields /* 818b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 828b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 838b671b80SJ. Bruce Fields * eventually cover more: 848b671b80SJ. Bruce Fields */ 858b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 868b671b80SJ. Bruce Fields 87fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 88fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 89e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 92e60d4398SNeilBrown 931da177e4SLinus Torvalds void 941da177e4SLinus Torvalds nfs4_lock_state(void) 951da177e4SLinus Torvalds { 96353ab6e9SIngo Molnar mutex_lock(&client_mutex); 971da177e4SLinus Torvalds } 981da177e4SLinus Torvalds 99508dc6e1SBenny Halevy static void free_session(struct kref *); 100508dc6e1SBenny Halevy 101508dc6e1SBenny Halevy /* Must be called under the client_lock */ 102508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 103508dc6e1SBenny Halevy { 104508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 105508dc6e1SBenny Halevy } 106508dc6e1SBenny Halevy 107508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 108508dc6e1SBenny Halevy { 109508dc6e1SBenny Halevy kref_get(&ses->se_ref); 110508dc6e1SBenny Halevy } 111508dc6e1SBenny Halevy 1121da177e4SLinus Torvalds void 1131da177e4SLinus Torvalds nfs4_unlock_state(void) 1141da177e4SLinus Torvalds { 115353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds 1181da177e4SLinus Torvalds static inline u32 1191da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1201da177e4SLinus Torvalds { 1211da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds u32 x = 0; 1241da177e4SLinus Torvalds while (nbytes--) { 1251da177e4SLinus Torvalds x *= 37; 1261da177e4SLinus Torvalds x += *cptr++; 1271da177e4SLinus Torvalds } 1281da177e4SLinus Torvalds return x; 1291da177e4SLinus Torvalds } 1301da177e4SLinus Torvalds 1311da177e4SLinus Torvalds static struct list_head del_recall_lru; 1321da177e4SLinus Torvalds 13332513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13432513b40SJ. Bruce Fields { 13532513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13632513b40SJ. Bruce Fields } 13732513b40SJ. Bruce Fields 13813cd2184SNeilBrown static inline void 13913cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14013cd2184SNeilBrown { 1418b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1428b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1438b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1448b671b80SJ. Bruce Fields iput(fi->fi_inode); 14532513b40SJ. Bruce Fields nfsd4_free_file(fi); 1468b671b80SJ. Bruce Fields } 14713cd2184SNeilBrown } 14813cd2184SNeilBrown 14913cd2184SNeilBrown static inline void 15013cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15113cd2184SNeilBrown { 1528b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15313cd2184SNeilBrown } 15413cd2184SNeilBrown 155ef0f3390SNeilBrown static int num_delegations; 156c2f1a551SMeelap Shah unsigned int max_delegations; 157ef0f3390SNeilBrown 158ef0f3390SNeilBrown /* 159ef0f3390SNeilBrown * Open owner state (share locks) 160ef0f3390SNeilBrown */ 161ef0f3390SNeilBrown 16216bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16316bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16416bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16516bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 166ef0f3390SNeilBrown 16716bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 168ddc04c41SJ. Bruce Fields { 169ddc04c41SJ. Bruce Fields unsigned int ret; 170ddc04c41SJ. Bruce Fields 171ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 172ddc04c41SJ. Bruce Fields ret += clientid; 17316bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 174ddc04c41SJ. Bruce Fields } 175ef0f3390SNeilBrown 17616bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 177ef0f3390SNeilBrown 178ef0f3390SNeilBrown /* hash table for nfs4_file */ 179ef0f3390SNeilBrown #define FILE_HASH_BITS 8 180ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18135079582SShan Wei 182ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 183ddc04c41SJ. Bruce Fields { 184ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 185ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 186ddc04c41SJ. Bruce Fields } 187ddc04c41SJ. Bruce Fields 188ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 189ef0f3390SNeilBrown 190998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 191f9d7562fSJ. Bruce Fields { 192f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 193f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 194f9d7562fSJ. Bruce Fields } 195f9d7562fSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 197998db52cSJ. Bruce Fields { 198998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 199998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 200998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 201998db52cSJ. Bruce Fields } else 202998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 203998db52cSJ. Bruce Fields } 204998db52cSJ. Bruce Fields 205998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 206f9d7562fSJ. Bruce Fields { 207f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 208f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 209f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields 213998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 214f9d7562fSJ. Bruce Fields { 215f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 216f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2173d02fa29SJ. Bruce Fields /* 2183d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2193d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2203d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2213d02fa29SJ. Bruce Fields */ 2223d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2233d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2243d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 225f9d7562fSJ. Bruce Fields } 226f9d7562fSJ. Bruce Fields } 227f9d7562fSJ. Bruce Fields 228998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 229998db52cSJ. Bruce Fields { 230998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 231998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 232998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 233998db52cSJ. Bruce Fields } else 234998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 235998db52cSJ. Bruce Fields } 236998db52cSJ. Bruce Fields 2376136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23836d44c60SJ. Bruce Fields { 2396136d2b4SJ. Bruce Fields static int min_stateid = 0; 24038c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2416136d2b4SJ. Bruce Fields int new_stid; 2426136d2b4SJ. Bruce Fields int error; 24336d44c60SJ. Bruce Fields 24438c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2456136d2b4SJ. Bruce Fields /* 246996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 247996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 248996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 249996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2506136d2b4SJ. Bruce Fields */ 2516136d2b4SJ. Bruce Fields BUG_ON(error); 2526136d2b4SJ. Bruce Fields /* 2536136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2546136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2556136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2566136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2576136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2586136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2596136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2606136d2b4SJ. Bruce Fields */ 2616136d2b4SJ. Bruce Fields 2626136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2636136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2646136d2b4SJ. Bruce Fields min_stateid = 0; 2656136d2b4SJ. Bruce Fields return new_stid; 26636d44c60SJ. Bruce Fields } 26736d44c60SJ. Bruce Fields 268996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2692a74aba7SJ. Bruce Fields { 2702a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2716136d2b4SJ. Bruce Fields int new_id; 2722a74aba7SJ. Bruce Fields 2732a74aba7SJ. Bruce Fields stid->sc_type = type; 2742a74aba7SJ. Bruce Fields stid->sc_client = cl; 2752a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2766136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2776136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2782a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2792a74aba7SJ. Bruce Fields s->si_generation = 0; 280996e0938SJ. Bruce Fields } 281996e0938SJ. Bruce Fields 282996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 283996e0938SJ. Bruce Fields { 284996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 285996e0938SJ. Bruce Fields 286996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 287996e0938SJ. Bruce Fields return NULL; 288996e0938SJ. Bruce Fields /* 289996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 290996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 291996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 292996e0938SJ. Bruce Fields * preallocated entries. 293996e0938SJ. Bruce Fields */ 294996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2952a74aba7SJ. Bruce Fields } 2962a74aba7SJ. Bruce Fields 2974cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2984cdc951bSJ. Bruce Fields { 2994cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3004cdc951bSJ. Bruce Fields } 3014cdc951bSJ. Bruce Fields 3021da177e4SLinus Torvalds static struct nfs4_delegation * 303dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3041da177e4SLinus Torvalds { 3051da177e4SLinus Torvalds struct nfs4_delegation *dp; 3061da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 309c3e48080SJ. Bruce Fields /* 310c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 311c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 312c3e48080SJ. Bruce Fields * write delegations properly. 313c3e48080SJ. Bruce Fields */ 314c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 315c3e48080SJ. Bruce Fields return NULL; 31647f9940cSMeelap Shah if (fp->fi_had_conflict) 31747f9940cSMeelap Shah return NULL; 318c2f1a551SMeelap Shah if (num_delegations > max_delegations) 319ef0f3390SNeilBrown return NULL; 320996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3215b2d21c1SNeilBrown if (dp == NULL) 3221da177e4SLinus Torvalds return dp; 323996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3242a74aba7SJ. Bruce Fields /* 3252a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3266136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3276136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3282a74aba7SJ. Bruce Fields */ 3292a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 330ef0f3390SNeilBrown num_delegations++; 331ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 332ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3331da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33413cd2184SNeilBrown get_nfs4_file(fp); 3351da177e4SLinus Torvalds dp->dl_file = fp; 3361da177e4SLinus Torvalds dp->dl_type = type; 3376c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3381da177e4SLinus Torvalds dp->dl_time = 0; 3391da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 340b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3411da177e4SLinus Torvalds return dp; 3421da177e4SLinus Torvalds } 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds void 3451da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3461da177e4SLinus Torvalds { 3471da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3481da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 34913cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3505b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 351ef0f3390SNeilBrown num_delegations--; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 355acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3561da177e4SLinus Torvalds { 357acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 358acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 359acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3604ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 361acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 362acfdf5c3SJ. Bruce Fields } 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3656136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3666136d2b4SJ. Bruce Fields { 36738c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36838c2f4b1SJ. Bruce Fields 36938c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3706136d2b4SJ. Bruce Fields } 3716136d2b4SJ. Bruce Fields 3721da177e4SLinus Torvalds /* Called under the state lock. */ 3731da177e4SLinus Torvalds static void 3741da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3751da177e4SLinus Torvalds { 3766136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 377ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3781da177e4SLinus Torvalds spin_lock(&recall_lock); 3795d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3801da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3811da177e4SLinus Torvalds spin_unlock(&recall_lock); 382acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3831da177e4SLinus Torvalds nfs4_put_delegation(dp); 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds /* 3871da177e4SLinus Torvalds * SETCLIENTID state 3881da177e4SLinus Torvalds */ 3891da177e4SLinus Torvalds 39036acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3919089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3929089f1b4SBenny Halevy 3931da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3941da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3951da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3961da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3971da177e4SLinus Torvalds 398ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 399ddc04c41SJ. Bruce Fields { 400ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 401ddc04c41SJ. Bruce Fields } 402ddc04c41SJ. Bruce Fields 403ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 404ddc04c41SJ. Bruce Fields { 405ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 406ddc04c41SJ. Bruce Fields } 407ddc04c41SJ. Bruce Fields 4081da177e4SLinus Torvalds /* 4091da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4101da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4111da177e4SLinus Torvalds * 4121da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4131da177e4SLinus Torvalds * setclientid_confirmed info. 4141da177e4SLinus Torvalds * 4151da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4161da177e4SLinus Torvalds * setclientid info. 4171da177e4SLinus Torvalds * 4181da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4191da177e4SLinus Torvalds * for lease renewal. 4201da177e4SLinus Torvalds * 4211da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4221da177e4SLinus Torvalds * for last close replay. 4231da177e4SLinus Torvalds */ 4241da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4251da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4261da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4271da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4291da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head client_lru; 4311da177e4SLinus Torvalds static struct list_head close_lru; 4321da177e4SLinus Torvalds 433f9d7562fSJ. Bruce Fields /* 434f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 435f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 436f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 437f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 438f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 439f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 440f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 441f9d7562fSJ. Bruce Fields * 442f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 443f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 444f9d7562fSJ. Bruce Fields * 445f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 446f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 447f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 448f9d7562fSJ. Bruce Fields * 449f9d7562fSJ. Bruce Fields * which we should reject. 450f9d7562fSJ. Bruce Fields */ 4515ae037e5SJeff Layton static unsigned int 4525ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 453f9d7562fSJ. Bruce Fields int i; 4545ae037e5SJeff Layton unsigned int access = 0; 455f9d7562fSJ. Bruce Fields 456f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 457f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4585ae037e5SJeff Layton access |= i; 459f9d7562fSJ. Bruce Fields } 4605ae037e5SJeff Layton return access; 461f9d7562fSJ. Bruce Fields } 462f9d7562fSJ. Bruce Fields 4633a328614SJeff Layton static bool 464dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 465f9d7562fSJ. Bruce Fields unsigned int access, deny; 466f9d7562fSJ. Bruce Fields 4675ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4685ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 469f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4703a328614SJeff Layton return false; 4713a328614SJeff Layton return true; 472f9d7562fSJ. Bruce Fields } 473f9d7562fSJ. Bruce Fields 47482c5ff1bSJeff Layton /* set share access for a given stateid */ 47582c5ff1bSJeff Layton static inline void 47682c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 47782c5ff1bSJeff Layton { 47882c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 47982c5ff1bSJeff Layton } 48082c5ff1bSJeff Layton 48182c5ff1bSJeff Layton /* clear share access for a given stateid */ 48282c5ff1bSJeff Layton static inline void 48382c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48482c5ff1bSJeff Layton { 48582c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48682c5ff1bSJeff Layton } 48782c5ff1bSJeff Layton 48882c5ff1bSJeff Layton /* test whether a given stateid has access */ 48982c5ff1bSJeff Layton static inline bool 49082c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49182c5ff1bSJeff Layton { 49282c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49382c5ff1bSJeff Layton } 49482c5ff1bSJeff Layton 495ce0fc43cSJeff Layton /* set share deny for a given stateid */ 496ce0fc43cSJeff Layton static inline void 497ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 498ce0fc43cSJeff Layton { 499ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 500ce0fc43cSJeff Layton } 501ce0fc43cSJeff Layton 502ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 503ce0fc43cSJeff Layton static inline void 504ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 505ce0fc43cSJeff Layton { 506ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 507ce0fc43cSJeff Layton } 508ce0fc43cSJeff Layton 509ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 510ce0fc43cSJeff Layton static inline bool 511ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 512ce0fc43cSJeff Layton { 513ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 514ce0fc43cSJeff Layton } 515ce0fc43cSJeff Layton 516f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 517f9d7562fSJ. Bruce Fields { 5188f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 519f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 520f9d7562fSJ. Bruce Fields return O_RDONLY; 521f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 522f9d7562fSJ. Bruce Fields return O_WRONLY; 523f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 524f9d7562fSJ. Bruce Fields return O_RDWR; 525f9d7562fSJ. Bruce Fields } 526f9d7562fSJ. Bruce Fields BUG(); 527f9d7562fSJ. Bruce Fields } 528f9d7562fSJ. Bruce Fields 52982c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53082c5ff1bSJeff Layton static void 53182c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53282c5ff1bSJeff Layton { 53382c5ff1bSJeff Layton int i; 53482c5ff1bSJeff Layton 53582c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53682c5ff1bSJeff Layton if (test_access(i, stp)) 53782c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 53882c5ff1bSJeff Layton nfs4_access_to_omode(i)); 53982c5ff1bSJeff Layton clear_access(i, stp); 54082c5ff1bSJeff Layton } 54182c5ff1bSJeff Layton } 54282c5ff1bSJeff Layton 543dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 544529d7b2aSJ. Bruce Fields { 545529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 546529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 547529d7b2aSJ. Bruce Fields } 548529d7b2aSJ. Bruce Fields 549dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 550529d7b2aSJ. Bruce Fields { 55182c5ff1bSJeff Layton release_all_access(stp); 552a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5534665e2baSJ. Bruce Fields stp->st_file = NULL; 5544665e2baSJ. Bruce Fields } 5554665e2baSJ. Bruce Fields 556dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5574665e2baSJ. Bruce Fields { 558529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 559529d7b2aSJ. Bruce Fields } 560529d7b2aSJ. Bruce Fields 561dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 562529d7b2aSJ. Bruce Fields { 563529d7b2aSJ. Bruce Fields struct file *file; 564529d7b2aSJ. Bruce Fields 565529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5666136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 567529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 568529d7b2aSJ. Bruce Fields if (file) 569fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57038c387b5SJ. Bruce Fields close_generic_stateid(stp); 571529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 572529d7b2aSJ. Bruce Fields } 573529d7b2aSJ. Bruce Fields 574fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 575529d7b2aSJ. Bruce Fields { 576dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 577529d7b2aSJ. Bruce Fields 578fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 579fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 580009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 581fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 582fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 583dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 584529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 585529d7b2aSJ. Bruce Fields } 586529d7b2aSJ. Bruce Fields } 587529d7b2aSJ. Bruce Fields 588fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 589529d7b2aSJ. Bruce Fields { 590fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 591fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 592529d7b2aSJ. Bruce Fields } 593529d7b2aSJ. Bruce Fields 594529d7b2aSJ. Bruce Fields static void 595dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 596529d7b2aSJ. Bruce Fields { 597fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 598529d7b2aSJ. Bruce Fields 599529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 600fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 601fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 602fe0750e5SJ. Bruce Fields release_lockowner(lo); 603529d7b2aSJ. Bruce Fields } 604529d7b2aSJ. Bruce Fields } 605529d7b2aSJ. Bruce Fields 60638c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6072283963fSJ. Bruce Fields { 6082283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6092283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61038c387b5SJ. Bruce Fields close_generic_stateid(stp); 61138c387b5SJ. Bruce Fields } 61238c387b5SJ. Bruce Fields 61338c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61438c387b5SJ. Bruce Fields { 61538c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6166136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6172283963fSJ. Bruce Fields free_generic_stateid(stp); 6182283963fSJ. Bruce Fields } 6192283963fSJ. Bruce Fields 620fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 621f1d110caSJ. Bruce Fields { 622dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 623f1d110caSJ. Bruce Fields 624fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 625fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 626fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 627fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 628dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 629f1d110caSJ. Bruce Fields release_open_stateid(stp); 630f1d110caSJ. Bruce Fields } 631f1d110caSJ. Bruce Fields } 632f1d110caSJ. Bruce Fields 633f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 634f7a4d872SJ. Bruce Fields { 635f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 636f7a4d872SJ. Bruce Fields 637f7a4d872SJ. Bruce Fields if (s) { 6386136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 639f7a4d872SJ. Bruce Fields free_generic_stateid(s); 640f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 641f7a4d872SJ. Bruce Fields } 642f7a4d872SJ. Bruce Fields } 643f7a4d872SJ. Bruce Fields 644fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 645f1d110caSJ. Bruce Fields { 646fe0750e5SJ. Bruce Fields unhash_openowner(oo); 647fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 648f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 649fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 650f1d110caSJ. Bruce Fields } 651f1d110caSJ. Bruce Fields 6525282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6535282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6545282fd72SMarc Eshel 6555282fd72SMarc Eshel static inline int 6565282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6575282fd72SMarc Eshel { 6585282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6595282fd72SMarc Eshel 6605282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6615282fd72SMarc Eshel } 6625282fd72SMarc Eshel 6638f199b82STrond Myklebust #ifdef NFSD_DEBUG 6645282fd72SMarc Eshel static inline void 6655282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6665282fd72SMarc Eshel { 6675282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6685282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6695282fd72SMarc Eshel } 6708f199b82STrond Myklebust #else 6718f199b82STrond Myklebust static inline void 6728f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6738f199b82STrond Myklebust { 6748f199b82STrond Myklebust } 6758f199b82STrond Myklebust #endif 6768f199b82STrond Myklebust 6775282fd72SMarc Eshel 678ec6b5d7bSAndy Adamson static void 679ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 680ec6b5d7bSAndy Adamson { 681ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 682ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 683ec6b5d7bSAndy Adamson 684ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 685ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 686ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 687ec6b5d7bSAndy Adamson sid->reserved = 0; 688ec6b5d7bSAndy Adamson } 689ec6b5d7bSAndy Adamson 690ec6b5d7bSAndy Adamson /* 691a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 692a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 693a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 694a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 695a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 696a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 697a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 698a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 699a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 700a649637cSAndy Adamson * for the SEQUENCE op response: 701ec6b5d7bSAndy Adamson */ 702a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 703a649637cSAndy Adamson 704557ce264SAndy Adamson static void 705557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 706557ce264SAndy Adamson { 707557ce264SAndy Adamson int i; 708557ce264SAndy Adamson 709557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 710557ce264SAndy Adamson kfree(ses->se_slots[i]); 711557ce264SAndy Adamson } 712557ce264SAndy Adamson 713efe0cb6dSJ. Bruce Fields /* 714efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 715efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 716efe0cb6dSJ. Bruce Fields */ 717efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 718efe0cb6dSJ. Bruce Fields { 719efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 720efe0cb6dSJ. Bruce Fields } 721efe0cb6dSJ. Bruce Fields 7225b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 723ec6b5d7bSAndy Adamson { 7245b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7255b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 726ec6b5d7bSAndy Adamson 7275b6feee9SJ. Bruce Fields return size; 728557ce264SAndy Adamson } 729557ce264SAndy Adamson 7305b6feee9SJ. Bruce Fields /* 7315b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7325b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73342b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7345b6feee9SJ. Bruce Fields */ 7355b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7365b6feee9SJ. Bruce Fields { 7375b6feee9SJ. Bruce Fields int avail; 7385b6feee9SJ. Bruce Fields 7395b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7405b6feee9SJ. Bruce Fields 7415b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7425b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7435b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7445b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7455b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7465b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7475b6feee9SJ. Bruce Fields 7485b6feee9SJ. Bruce Fields return num; 7495b6feee9SJ. Bruce Fields } 7505b6feee9SJ. Bruce Fields 7515b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7525b6feee9SJ. Bruce Fields { 7535b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7545b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7555b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7565b6feee9SJ. Bruce Fields } 7575b6feee9SJ. Bruce Fields 7585b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7595b6feee9SJ. Bruce Fields { 7605b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7615b6feee9SJ. Bruce Fields int mem, i; 762ec6b5d7bSAndy Adamson 763c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 764ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7655b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 766ec6b5d7bSAndy Adamson 7675b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7686c18ba9fSAlexandros Batsakis if (!new) 7695b6feee9SJ. Bruce Fields return NULL; 770ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7715b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7725b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7735b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7745b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 775ec6b5d7bSAndy Adamson goto out_free; 776ec6b5d7bSAndy Adamson } 7775b6feee9SJ. Bruce Fields return new; 7785b6feee9SJ. Bruce Fields out_free: 7795b6feee9SJ. Bruce Fields while (i--) 7805b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7815b6feee9SJ. Bruce Fields kfree(new); 7825b6feee9SJ. Bruce Fields return NULL; 7835b6feee9SJ. Bruce Fields } 7845b6feee9SJ. Bruce Fields 7855b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7865b6feee9SJ. Bruce Fields { 7875b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7885b6feee9SJ. Bruce Fields 7895b6feee9SJ. Bruce Fields new->maxreqs = numslots; 790d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 791d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7925b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7935b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7945b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7955b6feee9SJ. Bruce Fields } 7965b6feee9SJ. Bruce Fields 79719cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 79819cf5c02SJ. Bruce Fields { 79919cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80019cf5c02SJ. Bruce Fields kfree(c); 80119cf5c02SJ. Bruce Fields } 80219cf5c02SJ. Bruce Fields 80319cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80419cf5c02SJ. Bruce Fields { 80519cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80619cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 80719cf5c02SJ. Bruce Fields 80819cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 80919cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81019cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81119cf5c02SJ. Bruce Fields free_conn(c); 81219cf5c02SJ. Bruce Fields } 81319cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 814eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81519cf5c02SJ. Bruce Fields } 81619cf5c02SJ. Bruce Fields 817d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 818c7662518SJ. Bruce Fields { 819c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 820c7662518SJ. Bruce Fields 821c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 822c7662518SJ. Bruce Fields if (!conn) 823db90681dSJ. Bruce Fields return NULL; 824c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 825c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 826d29c374cSJ. Bruce Fields conn->cn_flags = flags; 827db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 828db90681dSJ. Bruce Fields return conn; 829db90681dSJ. Bruce Fields } 830db90681dSJ. Bruce Fields 831328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 832328ead28SJ. Bruce Fields { 833328ead28SJ. Bruce Fields conn->cn_session = ses; 834328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 835328ead28SJ. Bruce Fields } 836328ead28SJ. Bruce Fields 837db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 838db90681dSJ. Bruce Fields { 839db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 840c7662518SJ. Bruce Fields 841c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 842328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 843c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 844db90681dSJ. Bruce Fields } 845c7662518SJ. Bruce Fields 84621b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 847db90681dSJ. Bruce Fields { 84819cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 84921b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 850db90681dSJ. Bruce Fields } 851db90681dSJ. Bruce Fields 8521d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 853db90681dSJ. Bruce Fields { 854db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85521b75b01SJ. Bruce Fields int ret; 856db90681dSJ. Bruce Fields 8571d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 858db90681dSJ. Bruce Fields if (!conn) 859db90681dSJ. Bruce Fields return nfserr_jukebox; 860db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86121b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86221b75b01SJ. Bruce Fields if (ret) 86321b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86421b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 865c7662518SJ. Bruce Fields return nfs_ok; 866c7662518SJ. Bruce Fields } 867c7662518SJ. Bruce Fields 8681d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8691d1bc8f2SJ. Bruce Fields { 8701d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8711d1bc8f2SJ. Bruce Fields 8721d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8731d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8741d1bc8f2SJ. Bruce Fields 8751d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8761d1bc8f2SJ. Bruce Fields } 8771d1bc8f2SJ. Bruce Fields 8781d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 87919cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 880c7662518SJ. Bruce Fields { 88119cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 88219cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 88319cf5c02SJ. Bruce Fields 88419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 88519cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 88619cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 88719cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 88819cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 88919cf5c02SJ. Bruce Fields 89019cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89119cf5c02SJ. Bruce Fields free_conn(c); 89219cf5c02SJ. Bruce Fields 89319cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89419cf5c02SJ. Bruce Fields } 89519cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 896c7662518SJ. Bruce Fields } 897c7662518SJ. Bruce Fields 898508dc6e1SBenny Halevy static void free_session(struct kref *kref) 899c7662518SJ. Bruce Fields { 900c7662518SJ. Bruce Fields struct nfsd4_session *ses; 901c7662518SJ. Bruce Fields int mem; 902c7662518SJ. Bruce Fields 903508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 904c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 90519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 906c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 907c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 908c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 909c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 910c7662518SJ. Bruce Fields free_session_slots(ses); 911c7662518SJ. Bruce Fields kfree(ses); 912c7662518SJ. Bruce Fields } 913c7662518SJ. Bruce Fields 914508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 915508dc6e1SBenny Halevy { 916508dc6e1SBenny Halevy spin_lock(&client_lock); 917508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 918508dc6e1SBenny Halevy spin_unlock(&client_lock); 919508dc6e1SBenny Halevy } 920508dc6e1SBenny Halevy 921ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9225b6feee9SJ. Bruce Fields { 9235b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9245b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9255b6feee9SJ. Bruce Fields int numslots, slotsize; 92657b7b43bSJ. Bruce Fields __be32 status; 9275b6feee9SJ. Bruce Fields int idx; 9285b6feee9SJ. Bruce Fields 9295b6feee9SJ. Bruce Fields /* 9305b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9315b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9325b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9335b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9345b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9355b6feee9SJ. Bruce Fields */ 9365b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9375b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 938ced6dfe9SMi Jinlong if (numslots < 1) 939ced6dfe9SMi Jinlong return NULL; 9405b6feee9SJ. Bruce Fields 9415b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9425b6feee9SJ. Bruce Fields if (!new) { 9435b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 944ac7c46f2SJ. Bruce Fields return NULL; 9455b6feee9SJ. Bruce Fields } 9465b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 947ec6b5d7bSAndy Adamson 948ec6b5d7bSAndy Adamson new->se_client = clp; 949ec6b5d7bSAndy Adamson gen_sessionid(new); 950ec6b5d7bSAndy Adamson 951c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 952c7662518SJ. Bruce Fields 953ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 954ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9558b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 956ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9575b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9589089f1b4SBenny Halevy spin_lock(&client_lock); 959ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9604c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 961ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9624c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9639089f1b4SBenny Halevy spin_unlock(&client_lock); 964ec6b5d7bSAndy Adamson 9651d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 966ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 967c7662518SJ. Bruce Fields if (status) { 968508dc6e1SBenny Halevy spin_lock(&client_lock); 969c7662518SJ. Bruce Fields free_session(&new->se_ref); 970508dc6e1SBenny Halevy spin_unlock(&client_lock); 971ac7c46f2SJ. Bruce Fields return NULL; 972c7662518SJ. Bruce Fields } 973dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 974edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 975dcbeaa68SJ. Bruce Fields /* 976dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 977dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 978dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 979dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 980dcbeaa68SJ. Bruce Fields * future: 981dcbeaa68SJ. Bruce Fields */ 982edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 983edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 984edd76786SJ. Bruce Fields } 985dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 986ac7c46f2SJ. Bruce Fields return new; 987ec6b5d7bSAndy Adamson } 988ec6b5d7bSAndy Adamson 9899089f1b4SBenny Halevy /* caller must hold client_lock */ 9905282fd72SMarc Eshel static struct nfsd4_session * 9915282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9925282fd72SMarc Eshel { 9935282fd72SMarc Eshel struct nfsd4_session *elem; 9945282fd72SMarc Eshel int idx; 9955282fd72SMarc Eshel 9965282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9975282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9985282fd72SMarc Eshel /* Search in the appropriate list */ 9995282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10005282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10015282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10025282fd72SMarc Eshel return elem; 10035282fd72SMarc Eshel } 10045282fd72SMarc Eshel } 10055282fd72SMarc Eshel 10065282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10075282fd72SMarc Eshel return NULL; 10085282fd72SMarc Eshel } 10095282fd72SMarc Eshel 10109089f1b4SBenny Halevy /* caller must hold client_lock */ 10117116ed6bSAndy Adamson static void 10125282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10137116ed6bSAndy Adamson { 10147116ed6bSAndy Adamson list_del(&ses->se_hash); 10154c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10167116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10174c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10185282fd72SMarc Eshel } 10195282fd72SMarc Eshel 102036acb66bSBenny Halevy /* must be called under the client_lock */ 10211da177e4SLinus Torvalds static inline void 102236acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10231da177e4SLinus Torvalds { 102407cd4909SBenny Halevy if (is_client_expired(clp)) { 102507cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 102607cd4909SBenny Halevy __func__, 102707cd4909SBenny Halevy clp->cl_clientid.cl_boot, 102807cd4909SBenny Halevy clp->cl_clientid.cl_id); 102907cd4909SBenny Halevy return; 103007cd4909SBenny Halevy } 103107cd4909SBenny Halevy 10321da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10331da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10341da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10351da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10361da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 103936acb66bSBenny Halevy static inline void 104036acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 104136acb66bSBenny Halevy { 104236acb66bSBenny Halevy spin_lock(&client_lock); 104336acb66bSBenny Halevy renew_client_locked(clp); 104436acb66bSBenny Halevy spin_unlock(&client_lock); 104536acb66bSBenny Halevy } 104636acb66bSBenny Halevy 10471da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10481da177e4SLinus Torvalds static int 10491da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10521da177e4SLinus Torvalds return 0; 105360adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 105460adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10551da177e4SLinus Torvalds return 1; 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds /* 10591da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10601da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10611da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10621da177e4SLinus Torvalds */ 106335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds struct nfs4_client *clp; 10661da177e4SLinus Torvalds 106735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 106835bba9a3SJ. Bruce Fields if (clp == NULL) 106935bba9a3SJ. Bruce Fields return NULL; 107067114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 107135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 107235bba9a3SJ. Bruce Fields kfree(clp); 107335bba9a3SJ. Bruce Fields return NULL; 107435bba9a3SJ. Bruce Fields } 10751da177e4SLinus Torvalds clp->cl_name.len = name.len; 10761da177e4SLinus Torvalds return clp; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static inline void 10801da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10811da177e4SLinus Torvalds { 1082508dc6e1SBenny Halevy BUG_ON(!spin_is_locked(&client_lock)); 1083792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1084792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1085792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1086792c95ddSJ. Bruce Fields se_perclnt); 1087792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1088508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1089792c95ddSJ. Bruce Fields } 109003a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10911da177e4SLinus Torvalds kfree(clp->cl_name.data); 10921da177e4SLinus Torvalds kfree(clp); 10931da177e4SLinus Torvalds } 10941da177e4SLinus Torvalds 1095d7682988SBenny Halevy void 1096d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1097d7682988SBenny Halevy { 1098d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1099d7682988SBenny Halevy 1100d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1101d7682988SBenny Halevy return; 1102d7682988SBenny Halevy if (is_client_expired(clp)) { 1103d7682988SBenny Halevy free_client(clp); 1104d7682988SBenny Halevy session->se_client = NULL; 1105d7682988SBenny Halevy } else 1106d7682988SBenny Halevy renew_client_locked(clp); 1107d7682988SBenny Halevy spin_unlock(&client_lock); 1108d7682988SBenny Halevy } 1109d7682988SBenny Halevy 111084d38ac9SBenny Halevy /* must be called under the client_lock */ 111184d38ac9SBenny Halevy static inline void 111284d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 111384d38ac9SBenny Halevy { 1114792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1115792c95ddSJ. Bruce Fields 111607cd4909SBenny Halevy mark_client_expired(clp); 111784d38ac9SBenny Halevy list_del(&clp->cl_lru); 11184c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1119792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1120792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11214c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 112284d38ac9SBenny Halevy } 112384d38ac9SBenny Halevy 11241da177e4SLinus Torvalds static void 11251da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11261da177e4SLinus Torvalds { 1127fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11281da177e4SLinus Torvalds struct nfs4_delegation *dp; 11291da177e4SLinus Torvalds struct list_head reaplist; 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11321da177e4SLinus Torvalds spin_lock(&recall_lock); 1133ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1134ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1135ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11361da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds spin_unlock(&recall_lock); 11391da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11401da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11411da177e4SLinus Torvalds unhash_delegation(dp); 11421da177e4SLinus Torvalds } 1143ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1144fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1145fe0750e5SJ. Bruce Fields release_openowner(oo); 11461da177e4SLinus Torvalds } 11476ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11482bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11492bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 115084d38ac9SBenny Halevy list_del(&clp->cl_idhash); 115184d38ac9SBenny Halevy list_del(&clp->cl_strhash); 115284d38ac9SBenny Halevy spin_lock(&client_lock); 115384d38ac9SBenny Halevy unhash_client_locked(clp); 115446583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1155b12a05cbSJ. Bruce Fields free_client(clp); 115646583e25SBenny Halevy spin_unlock(&client_lock); 11571da177e4SLinus Torvalds } 11581da177e4SLinus Torvalds 115935bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116035bba9a3SJ. Bruce Fields { 116135bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 116235bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 116535bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 116635bba9a3SJ. Bruce Fields { 11671da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11681da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds 117103a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 117235bba9a3SJ. Bruce Fields { 117303a4e1f6SJ. Bruce Fields if (source->cr_principal) { 117403a4e1f6SJ. Bruce Fields target->cr_principal = 117503a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 117603a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 117703a4e1f6SJ. Bruce Fields return -ENOMEM; 117803a4e1f6SJ. Bruce Fields } else 117903a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1180d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11811da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11821da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11831da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11841da177e4SLinus Torvalds get_group_info(target->cr_group_info); 118503a4e1f6SJ. Bruce Fields return 0; 11861da177e4SLinus Torvalds } 11871da177e4SLinus Torvalds 118835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1189599e0a22SJ. Bruce Fields { 1190a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds static int 1194599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1195599e0a22SJ. Bruce Fields { 1196599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11971da177e4SLinus Torvalds } 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds static int 1200599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1201599e0a22SJ. Bruce Fields { 1202599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12058fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12068fbba96eSJ. Bruce Fields { 12078fbba96eSJ. Bruce Fields int i; 12088fbba96eSJ. Bruce Fields 12098fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12108fbba96eSJ. Bruce Fields return false; 12118fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12128fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12138fbba96eSJ. Bruce Fields return false; 12148fbba96eSJ. Bruce Fields return true; 12158fbba96eSJ. Bruce Fields } 12168fbba96eSJ. Bruce Fields 12171da177e4SLinus Torvalds static int 1218599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1219599e0a22SJ. Bruce Fields { 1220d5497fc6SJ. Bruce Fields if ((cr1->cr_flavor != cr2->cr_flavor) 1221d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12228fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12238fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12248fbba96eSJ. Bruce Fields return false; 12258fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12268fbba96eSJ. Bruce Fields return true; 12278fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12288fbba96eSJ. Bruce Fields return false; 12298fbba96eSJ. Bruce Fields return 0 == strcmp(cr1->cr_principal, cr1->cr_principal); 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds 12325ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12335ec7b46cSJ. Bruce Fields { 12345ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12355ec7b46cSJ. Bruce Fields 12361da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 12371da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds 1240deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1241deda2faaSJ. Bruce Fields { 1242ab4684d1SChuck Lever __be32 verf[2]; 1243deda2faaSJ. Bruce Fields static u32 i; 12441da177e4SLinus Torvalds 1245ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1246ab4684d1SChuck Lever verf[1] = (__be32)i++; 1247ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 125038c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12514581d140SJ. Bruce Fields { 125238c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12534581d140SJ. Bruce Fields } 12544d71ab87SJ. Bruce Fields 125538c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1256f459e453SJ. Bruce Fields { 1257f459e453SJ. Bruce Fields struct nfs4_stid *s; 1258f459e453SJ. Bruce Fields 125938c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1260f459e453SJ. Bruce Fields if (!s) 1261f459e453SJ. Bruce Fields return NULL; 1262f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12634d71ab87SJ. Bruce Fields return s; 12644581d140SJ. Bruce Fields return NULL; 12654581d140SJ. Bruce Fields } 12664581d140SJ. Bruce Fields 1267b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1268b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1269b09333c4SRicardo Labiaga { 1270b09333c4SRicardo Labiaga struct nfs4_client *clp; 1271b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 127203a4e1f6SJ. Bruce Fields int ret; 1273b09333c4SRicardo Labiaga 1274b09333c4SRicardo Labiaga clp = alloc_client(name); 1275b09333c4SRicardo Labiaga if (clp == NULL) 1276b09333c4SRicardo Labiaga return NULL; 1277b09333c4SRicardo Labiaga 1278792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 127903a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 128003a4e1f6SJ. Bruce Fields if (ret) { 1281508dc6e1SBenny Halevy spin_lock(&client_lock); 1282b09333c4SRicardo Labiaga free_client(clp); 1283508dc6e1SBenny Halevy spin_unlock(&client_lock); 1284b09333c4SRicardo Labiaga return NULL; 1285b09333c4SRicardo Labiaga } 128638c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1287b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 128846583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 128977a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1290b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1291b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1292b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1293b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1294b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12955ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12966ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1297cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 129807cd4909SBenny Halevy clp->cl_time = get_seconds(); 1299b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1300b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1301b09333c4SRicardo Labiaga copy_verf(clp, verf); 1302b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1303b09333c4SRicardo Labiaga gen_confirm(clp); 1304edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1305b09333c4SRicardo Labiaga return clp; 1306b09333c4SRicardo Labiaga } 1307b09333c4SRicardo Labiaga 1308fd39ca9aSNeilBrown static void 13091da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13101da177e4SLinus Torvalds { 13111da177e4SLinus Torvalds unsigned int idhashval; 13121da177e4SLinus Torvalds 13131da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13141da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13151da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 131636acb66bSBenny Halevy renew_client(clp); 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds 1319fd39ca9aSNeilBrown static void 13201da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13211da177e4SLinus Torvalds { 13221da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13231da177e4SLinus Torvalds unsigned int strhashval; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1326f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1327a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1328328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13291da177e4SLinus Torvalds renew_client(clp); 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds static struct nfs4_client * 13331da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13341da177e4SLinus Torvalds { 13351da177e4SLinus Torvalds struct nfs4_client *clp; 13361da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1339a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1340a50d2ad1SJ. Bruce Fields renew_client(clp); 13411da177e4SLinus Torvalds return clp; 13421da177e4SLinus Torvalds } 1343a50d2ad1SJ. Bruce Fields } 13441da177e4SLinus Torvalds return NULL; 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds static struct nfs4_client * 13481da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13491da177e4SLinus Torvalds { 13501da177e4SLinus Torvalds struct nfs4_client *clp; 13511da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1354599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13551da177e4SLinus Torvalds return clp; 13561da177e4SLinus Torvalds } 13571da177e4SLinus Torvalds return NULL; 13581da177e4SLinus Torvalds } 13591da177e4SLinus Torvalds 13606e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1361a1bcecd2SAndy Adamson { 13626e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1363a1bcecd2SAndy Adamson } 1364a1bcecd2SAndy Adamson 136528ce6054SNeilBrown static struct nfs4_client * 1366e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 136728ce6054SNeilBrown { 136828ce6054SNeilBrown struct nfs4_client *clp; 136928ce6054SNeilBrown 137028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1371e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 137228ce6054SNeilBrown return clp; 137328ce6054SNeilBrown } 137428ce6054SNeilBrown return NULL; 137528ce6054SNeilBrown } 137628ce6054SNeilBrown 137728ce6054SNeilBrown static struct nfs4_client * 1378e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 137928ce6054SNeilBrown { 138028ce6054SNeilBrown struct nfs4_client *clp; 138128ce6054SNeilBrown 138228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1383e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 138428ce6054SNeilBrown return clp; 138528ce6054SNeilBrown } 138628ce6054SNeilBrown return NULL; 138728ce6054SNeilBrown } 138828ce6054SNeilBrown 1389fd39ca9aSNeilBrown static void 13906f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13911da177e4SLinus Torvalds { 139207263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13936f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13946f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13957077ecbaSJeff Layton unsigned short expected_family; 13961da177e4SLinus Torvalds 13977077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13987077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13997077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14007077ecbaSJeff Layton expected_family = AF_INET; 14017077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14027077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14037077ecbaSJeff Layton expected_family = AF_INET6; 14047077ecbaSJeff Layton else 14051da177e4SLinus Torvalds goto out_err; 14061da177e4SLinus Torvalds 1407f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1408aa9a4ec7SJeff Layton se->se_callback_addr_len, 140907263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 141007263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1411aa9a4ec7SJeff Layton 141207263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14131da177e4SLinus Torvalds goto out_err; 1414aa9a4ec7SJeff Layton 141507263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 141607263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1417fbf4665fSJeff Layton 141807263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 141907263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1420849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14211da177e4SLinus Torvalds return; 14221da177e4SLinus Torvalds out_err: 142307263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 142407263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1425849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14261da177e4SLinus Torvalds "will not receive delegations\n", 14271da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds return; 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds 1432074fe897SAndy Adamson /* 1433557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1434074fe897SAndy Adamson */ 1435074fe897SAndy Adamson void 1436074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1437074fe897SAndy Adamson { 1438557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1439557ce264SAndy Adamson unsigned int base; 1440074fe897SAndy Adamson 1441557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1442074fe897SAndy Adamson 1443557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1444557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1445bf864a31SAndy Adamson 1446bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1447bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1448557ce264SAndy Adamson slot->sl_datalen = 0; 1449bf864a31SAndy Adamson return; 1450bf864a31SAndy Adamson } 1451557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1452557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1453557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1454557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1455557ce264SAndy Adamson slot->sl_datalen)) 1456557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1457557ce264SAndy Adamson return; 1458074fe897SAndy Adamson } 1459074fe897SAndy Adamson 1460074fe897SAndy Adamson /* 1461abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1462abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1463abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1464abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1465abfabf8cSAndy Adamson * 1466074fe897SAndy Adamson */ 1467abfabf8cSAndy Adamson static __be32 1468abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1469abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1470074fe897SAndy Adamson { 1471abfabf8cSAndy Adamson struct nfsd4_op *op; 1472abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1473074fe897SAndy Adamson 1474abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1475abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1476abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1477abfabf8cSAndy Adamson 1478abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 147973e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1480abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1481abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1482abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1483074fe897SAndy Adamson } 1484abfabf8cSAndy Adamson return op->status; 1485074fe897SAndy Adamson } 1486074fe897SAndy Adamson 1487074fe897SAndy Adamson /* 1488557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1489557ce264SAndy Adamson * session values. 1490074fe897SAndy Adamson */ 1491074fe897SAndy Adamson __be32 1492bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1493bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1494074fe897SAndy Adamson { 1495557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1496074fe897SAndy Adamson __be32 status; 1497074fe897SAndy Adamson 1498557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1499074fe897SAndy Adamson 1500abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1501abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1502abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1503abfabf8cSAndy Adamson return status; 1504074fe897SAndy Adamson 1505557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1506557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1507074fe897SAndy Adamson 1508557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1509557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1510557ce264SAndy Adamson status = slot->sl_status; 1511074fe897SAndy Adamson 1512074fe897SAndy Adamson return status; 1513074fe897SAndy Adamson } 1514074fe897SAndy Adamson 15150733d213SAndy Adamson /* 15160733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15170733d213SAndy Adamson */ 15180733d213SAndy Adamson static void 15190733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15200733d213SAndy Adamson { 15210733d213SAndy Adamson /* pNFS is not supported */ 15220733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15230733d213SAndy Adamson 15240733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15250733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15260733d213SAndy Adamson 15270733d213SAndy Adamson /* set the wire flags to return to client. */ 15280733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15290733d213SAndy Adamson } 15300733d213SAndy Adamson 1531631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1532631fc9eaSJ. Bruce Fields { 1533631fc9eaSJ. Bruce Fields /* 1534631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1535631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1536631fc9eaSJ. Bruce Fields * 1537631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1538631fc9eaSJ. Bruce Fields */ 1539631fc9eaSJ. Bruce Fields return list_empty(&clp->cl_openowners) 1540631fc9eaSJ. Bruce Fields && list_empty(&clp->cl_delegations) 1541631fc9eaSJ. Bruce Fields && list_empty(&clp->cl_sessions); 1542631fc9eaSJ. Bruce Fields } 1543631fc9eaSJ. Bruce Fields 1544b37ad28bSAl Viro __be32 1545069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1546069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1547069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1548069b6ad4SAndy Adamson { 15490733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 155057b7b43bSJ. Bruce Fields __be32 status; 15510733d213SAndy Adamson unsigned int strhashval; 15520733d213SAndy Adamson char dname[HEXDIR_LEN]; 1553363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15540733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1555363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 155683e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15570733d213SAndy Adamson 1558363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15590733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1560363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15610733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1562363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15630733d213SAndy Adamson 1564a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15650733d213SAndy Adamson return nfserr_inval; 15660733d213SAndy Adamson 15670733d213SAndy Adamson /* Currently only support SP4_NONE */ 15680733d213SAndy Adamson switch (exid->spa_how) { 15690733d213SAndy Adamson case SP4_NONE: 15700733d213SAndy Adamson break; 15710733d213SAndy Adamson case SP4_SSV: 1572044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15730733d213SAndy Adamson default: 15740733d213SAndy Adamson BUG(); /* checked by xdr code */ 15750733d213SAndy Adamson case SP4_MACH_CRED: 15760733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15770733d213SAndy Adamson } 15780733d213SAndy Adamson 15790733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15800733d213SAndy Adamson 15810733d213SAndy Adamson if (status) 15822786cc3aSJ. Bruce Fields return status; 15830733d213SAndy Adamson 15840733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15850733d213SAndy Adamson 15862dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 15870733d213SAndy Adamson nfs4_lock_state(); 1588e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15890733d213SAndy Adamson if (conf) { 159083e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 159183e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 159283e08fd4SJ. Bruce Fields 1593136e658dSJ. Bruce Fields if (update) { 1594136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 15952dbb269dSJ. Bruce Fields status = nfserr_inval; 1596e203d506SJ. Bruce Fields goto out; 1597e203d506SJ. Bruce Fields } 15982dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 1599ea236d07SJ. Bruce Fields status = nfserr_perm; 1600ea236d07SJ. Bruce Fields goto out; 1601ea236d07SJ. Bruce Fields } 16022dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16030733d213SAndy Adamson status = nfserr_not_same; 16040733d213SAndy Adamson goto out; 16050733d213SAndy Adamson } 1606136e658dSJ. Bruce Fields /* case 6 */ 1607136e658dSJ. Bruce Fields exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 1608136e658dSJ. Bruce Fields new = conf; 1609136e658dSJ. Bruce Fields goto out_copy; 1610136e658dSJ. Bruce Fields } 1611136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1612631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1613136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1614136e658dSJ. Bruce Fields goto out; 1615136e658dSJ. Bruce Fields } 1616631fc9eaSJ. Bruce Fields goto expire_client; 1617631fc9eaSJ. Bruce Fields } 1618136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 1619136e658dSJ. Bruce Fields exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 1620136e658dSJ. Bruce Fields new = conf; 1621136e658dSJ. Bruce Fields goto out_copy; 1622136e658dSJ. Bruce Fields } 16232dbb269dSJ. Bruce Fields /* case 5, client reboot */ 1624631fc9eaSJ. Bruce Fields expire_client: 16250733d213SAndy Adamson expire_client(conf); 16260733d213SAndy Adamson goto out_new; 16270733d213SAndy Adamson } 16286ddbbbfeSMike Sager 16292dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16300733d213SAndy Adamson status = nfserr_noent; 16310733d213SAndy Adamson goto out; 16320733d213SAndy Adamson } 16330733d213SAndy Adamson 1634e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16352dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16360733d213SAndy Adamson expire_client(unconf); 16370733d213SAndy Adamson 16382dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16390733d213SAndy Adamson out_new: 1640b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16410733d213SAndy Adamson if (new == NULL) { 16424731030dSJ. Bruce Fields status = nfserr_jukebox; 16430733d213SAndy Adamson goto out; 16440733d213SAndy Adamson } 16450733d213SAndy Adamson 16460733d213SAndy Adamson gen_clid(new); 16470733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16480733d213SAndy Adamson out_copy: 16490733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16500733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16510733d213SAndy Adamson 165238eb76a5SAndy Adamson exid->seqid = 1; 16530733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16540733d213SAndy Adamson 16550733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 165649557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16570733d213SAndy Adamson status = nfs_ok; 16580733d213SAndy Adamson 16590733d213SAndy Adamson out: 16600733d213SAndy Adamson nfs4_unlock_state(); 16610733d213SAndy Adamson return status; 1662069b6ad4SAndy Adamson } 1663069b6ad4SAndy Adamson 166457b7b43bSJ. Bruce Fields static __be32 166588e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1666b85d4c01SBenny Halevy { 166788e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 166888e588d5SAndy Adamson slot_seqid); 1669b85d4c01SBenny Halevy 1670b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 167188e588d5SAndy Adamson if (slot_inuse) { 167288e588d5SAndy Adamson if (seqid == slot_seqid) 1673b85d4c01SBenny Halevy return nfserr_jukebox; 1674b85d4c01SBenny Halevy else 1675b85d4c01SBenny Halevy return nfserr_seq_misordered; 1676b85d4c01SBenny Halevy } 1677f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 167888e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1679b85d4c01SBenny Halevy return nfs_ok; 168088e588d5SAndy Adamson if (seqid == slot_seqid) 1681b85d4c01SBenny Halevy return nfserr_replay_cache; 1682b85d4c01SBenny Halevy return nfserr_seq_misordered; 1683b85d4c01SBenny Halevy } 1684b85d4c01SBenny Halevy 168549557cc7SAndy Adamson /* 168649557cc7SAndy Adamson * Cache the create session result into the create session single DRC 168749557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 168849557cc7SAndy Adamson * Do this for solo or embedded create session operations. 168949557cc7SAndy Adamson */ 169049557cc7SAndy Adamson static void 169149557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 169257b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 169349557cc7SAndy Adamson { 169449557cc7SAndy Adamson slot->sl_status = nfserr; 169549557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 169649557cc7SAndy Adamson } 169749557cc7SAndy Adamson 169849557cc7SAndy Adamson static __be32 169949557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 170049557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 170149557cc7SAndy Adamson { 170249557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 170349557cc7SAndy Adamson return slot->sl_status; 170449557cc7SAndy Adamson } 170549557cc7SAndy Adamson 17061b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17071b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17081b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17091b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17101b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17111b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17121b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17131b74c25bSMi Jinlong 17141b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17151b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17161b74c25bSMi Jinlong 1 + /* status */ \ 17171b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17181b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17191b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17201b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17211b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17221b74c25bSMi Jinlong 172357b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17241b74c25bSMi Jinlong { 17251b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17261b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17271b74c25bSMi Jinlong } 17281b74c25bSMi Jinlong 1729069b6ad4SAndy Adamson __be32 1730069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1731069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1732069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1733069b6ad4SAndy Adamson { 1734363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1735ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1736ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 173749557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 173886c3e16cSJ. Bruce Fields bool confirm_me = false; 173957b7b43bSJ. Bruce Fields __be32 status = 0; 1740ec6b5d7bSAndy Adamson 1741a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1742a62573dcSMi Jinlong return nfserr_inval; 1743a62573dcSMi Jinlong 1744ec6b5d7bSAndy Adamson nfs4_lock_state(); 1745ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1746ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1747ec6b5d7bSAndy Adamson 1748ec6b5d7bSAndy Adamson if (conf) { 174949557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 175049557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 175138eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1752ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 175349557cc7SAndy Adamson cs_slot->sl_seqid); 175438eb76a5SAndy Adamson /* Return the cached reply status */ 175549557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 175638eb76a5SAndy Adamson goto out; 175749557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1758ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1759ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1760ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 176149557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1762ec6b5d7bSAndy Adamson goto out; 1763ec6b5d7bSAndy Adamson } 1764ec6b5d7bSAndy Adamson } else if (unconf) { 1765ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1766363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1767ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1768ec6b5d7bSAndy Adamson goto out; 1769ec6b5d7bSAndy Adamson } 1770ec6b5d7bSAndy Adamson 177149557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 177249557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 177338eb76a5SAndy Adamson if (status) { 177438eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1775ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1776cd5b8144SJ. Bruce Fields goto out; 1777ec6b5d7bSAndy Adamson } 1778ec6b5d7bSAndy Adamson 177986c3e16cSJ. Bruce Fields confirm_me = true; 1780ec6b5d7bSAndy Adamson conf = unconf; 1781ec6b5d7bSAndy Adamson } else { 1782ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1783ec6b5d7bSAndy Adamson goto out; 1784ec6b5d7bSAndy Adamson } 1785ec6b5d7bSAndy Adamson 1786408b79bcSJ. Bruce Fields /* 17878323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17888323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17898323c3b2SJ. Bruce Fields */ 17908323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17918323c3b2SJ. Bruce Fields /* 1792408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1793408b79bcSJ. Bruce Fields */ 1794408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1795408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1796408b79bcSJ. Bruce Fields 17971b74c25bSMi Jinlong status = nfserr_toosmall; 17981b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17991b74c25bSMi Jinlong goto out; 18001b74c25bSMi Jinlong 1801ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1802ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1803ac7c46f2SJ. Bruce Fields if (!new) 1804ec6b5d7bSAndy Adamson goto out; 1805ac7c46f2SJ. Bruce Fields status = nfs_ok; 1806ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1807ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 180812050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 180912050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 181086c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 181149557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1812ec6b5d7bSAndy Adamson 181349557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 181449557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 181586c3e16cSJ. Bruce Fields if (confirm_me) 181686c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1817ec6b5d7bSAndy Adamson out: 1818ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1819ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1820ec6b5d7bSAndy Adamson return status; 1821069b6ad4SAndy Adamson } 1822069b6ad4SAndy Adamson 182357716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 182457716355SJ. Bruce Fields { 182557716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 182657716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 182757716355SJ. Bruce Fields 182857716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 182957716355SJ. Bruce Fields } 183057716355SJ. Bruce Fields 18311d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18321d1bc8f2SJ. Bruce Fields { 18331d1bc8f2SJ. Bruce Fields switch (*dir) { 18341d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18351d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18361d1bc8f2SJ. Bruce Fields return nfs_ok; 18371d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18381d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18391d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18401d1bc8f2SJ. Bruce Fields return nfs_ok; 18411d1bc8f2SJ. Bruce Fields }; 18421d1bc8f2SJ. Bruce Fields return nfserr_inval; 18431d1bc8f2SJ. Bruce Fields } 18441d1bc8f2SJ. Bruce Fields 18451d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18461d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18471d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18481d1bc8f2SJ. Bruce Fields { 18491d1bc8f2SJ. Bruce Fields __be32 status; 18501d1bc8f2SJ. Bruce Fields 18511d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18521d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18531d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18541d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18551d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18561d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18571d1bc8f2SJ. Bruce Fields if (cstate->session) { 18581d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18591d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18601d1bc8f2SJ. Bruce Fields } 18611d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18621d1bc8f2SJ. Bruce Fields if (!cstate->session) 18631d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18641d1bc8f2SJ. Bruce Fields 18651d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18661db2b9ddSBryan Schumaker if (!status) 18671d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18681db2b9ddSBryan Schumaker return status; 18691d1bc8f2SJ. Bruce Fields } 18701d1bc8f2SJ. Bruce Fields 18715d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18725d4cec2fSJ. Bruce Fields { 18735d4cec2fSJ. Bruce Fields if (!session) 18745d4cec2fSJ. Bruce Fields return 0; 18755d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18765d4cec2fSJ. Bruce Fields } 18775d4cec2fSJ. Bruce Fields 1878069b6ad4SAndy Adamson __be32 1879069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1880069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1881069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1882069b6ad4SAndy Adamson { 1883e10e0cfcSBenny Halevy struct nfsd4_session *ses; 188457b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1885e10e0cfcSBenny Halevy 1886e10e0cfcSBenny Halevy /* Notes: 1887e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1888e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1889e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1890e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1891e10e0cfcSBenny Halevy */ 1892e10e0cfcSBenny Halevy 18935d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 189457716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 189557716355SJ. Bruce Fields return nfserr_not_only_op; 189657716355SJ. Bruce Fields } 1897e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18989089f1b4SBenny Halevy spin_lock(&client_lock); 1899e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1900e10e0cfcSBenny Halevy if (!ses) { 19019089f1b4SBenny Halevy spin_unlock(&client_lock); 1902e10e0cfcSBenny Halevy goto out; 1903e10e0cfcSBenny Halevy } 1904e10e0cfcSBenny Halevy 1905e10e0cfcSBenny Halevy unhash_session(ses); 19069089f1b4SBenny Halevy spin_unlock(&client_lock); 1907e10e0cfcSBenny Halevy 1908ab707e15SBenny Halevy nfs4_lock_state(); 190984f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1910ab707e15SBenny Halevy nfs4_unlock_state(); 191119cf5c02SJ. Bruce Fields 1912508dc6e1SBenny Halevy spin_lock(&client_lock); 191319cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1914508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1915508dc6e1SBenny Halevy spin_unlock(&client_lock); 1916e10e0cfcSBenny Halevy status = nfs_ok; 1917e10e0cfcSBenny Halevy out: 1918e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1919e10e0cfcSBenny Halevy return status; 1920069b6ad4SAndy Adamson } 1921069b6ad4SAndy Adamson 1922a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1923328ead28SJ. Bruce Fields { 1924328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1925328ead28SJ. Bruce Fields 1926328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1927a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1928328ead28SJ. Bruce Fields return c; 1929328ead28SJ. Bruce Fields } 1930328ead28SJ. Bruce Fields } 1931328ead28SJ. Bruce Fields return NULL; 1932328ead28SJ. Bruce Fields } 1933328ead28SJ. Bruce Fields 1934a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1935328ead28SJ. Bruce Fields { 1936328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1937a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 193821b75b01SJ. Bruce Fields int ret; 1939328ead28SJ. Bruce Fields 1940328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1941a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1942328ead28SJ. Bruce Fields if (c) { 1943328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1944328ead28SJ. Bruce Fields free_conn(new); 1945328ead28SJ. Bruce Fields return; 1946328ead28SJ. Bruce Fields } 1947328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1948328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 194921b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 195021b75b01SJ. Bruce Fields if (ret) 195121b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 195221b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1953328ead28SJ. Bruce Fields return; 1954328ead28SJ. Bruce Fields } 1955328ead28SJ. Bruce Fields 1956868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1957868b89c3SMi Jinlong { 1958868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1959868b89c3SMi Jinlong 1960868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1961868b89c3SMi Jinlong } 1962868b89c3SMi Jinlong 1963ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1964ae82a8d0SMi Jinlong struct nfsd4_session *session) 1965ae82a8d0SMi Jinlong { 1966ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1967ae82a8d0SMi Jinlong 1968ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1969ae82a8d0SMi Jinlong } 1970ae82a8d0SMi Jinlong 1971069b6ad4SAndy Adamson __be32 1972b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1973069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1974069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1975069b6ad4SAndy Adamson { 1976f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1977b85d4c01SBenny Halevy struct nfsd4_session *session; 1978b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1979a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 198057b7b43bSJ. Bruce Fields __be32 status; 1981b85d4c01SBenny Halevy 1982f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1983f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1984f9bb94c4SAndy Adamson 1985a663bdd8SJ. Bruce Fields /* 1986a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1987a663bdd8SJ. Bruce Fields * below. 1988a663bdd8SJ. Bruce Fields */ 1989a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1990a663bdd8SJ. Bruce Fields if (!conn) 1991a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1992a663bdd8SJ. Bruce Fields 19939089f1b4SBenny Halevy spin_lock(&client_lock); 1994b85d4c01SBenny Halevy status = nfserr_badsession; 1995b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1996b85d4c01SBenny Halevy if (!session) 1997b85d4c01SBenny Halevy goto out; 1998b85d4c01SBenny Halevy 1999868b89c3SMi Jinlong status = nfserr_too_many_ops; 2000868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2001868b89c3SMi Jinlong goto out; 2002868b89c3SMi Jinlong 2003ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2004ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2005ae82a8d0SMi Jinlong goto out; 2006ae82a8d0SMi Jinlong 2007b85d4c01SBenny Halevy status = nfserr_badslot; 20086c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2009b85d4c01SBenny Halevy goto out; 2010b85d4c01SBenny Halevy 2011557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2012b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2013b85d4c01SBenny Halevy 2014a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2015a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2016a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2017a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2018a8dfdaebSAndy Adamson 201973e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 202073e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2021b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2022bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2023bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2024bf5c43c8SJ. Bruce Fields goto out; 2025b85d4c01SBenny Halevy cstate->slot = slot; 2026b85d4c01SBenny Halevy cstate->session = session; 2027da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2028557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2029bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2030da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2031aaf84eb9SBenny Halevy goto out; 2032b85d4c01SBenny Halevy } 2033b85d4c01SBenny Halevy if (status) 2034b85d4c01SBenny Halevy goto out; 2035b85d4c01SBenny Halevy 2036a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2037a663bdd8SJ. Bruce Fields conn = NULL; 2038328ead28SJ. Bruce Fields 2039b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2040b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2041bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 204273e79482SJ. Bruce Fields if (seq->cachethis) 204373e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2044bf5c43c8SJ. Bruce Fields else 2045bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2046b85d4c01SBenny Halevy 2047b85d4c01SBenny Halevy cstate->slot = slot; 2048b85d4c01SBenny Halevy cstate->session = session; 2049b85d4c01SBenny Halevy 2050b85d4c01SBenny Halevy out: 205126c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2052aaf84eb9SBenny Halevy if (cstate->session) { 20530d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20540d7bb719SJ. Bruce Fields 205536acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20560d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20575423732aSBenny Halevy switch (clp->cl_cb_state) { 20585423732aSBenny Halevy case NFSD4_CB_DOWN: 2059fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20605423732aSBenny Halevy break; 20615423732aSBenny Halevy case NFSD4_CB_FAULT: 2062fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20635423732aSBenny Halevy break; 2064fc0c3dd1SBenny Halevy default: 2065fc0c3dd1SBenny Halevy seq->status_flags = 0; 20665423732aSBenny Halevy } 2067aaf84eb9SBenny Halevy } 2068a663bdd8SJ. Bruce Fields kfree(conn); 206936acb66bSBenny Halevy spin_unlock(&client_lock); 2070b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2071b85d4c01SBenny Halevy return status; 2072069b6ad4SAndy Adamson } 2073069b6ad4SAndy Adamson 2074345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 2075345c2842SMi Jinlong { 2076345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 2077345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 2078345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 2079345c2842SMi Jinlong } 2080345c2842SMi Jinlong 2081345c2842SMi Jinlong __be32 2082345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2083345c2842SMi Jinlong { 2084345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 208557b7b43bSJ. Bruce Fields __be32 status = 0; 2086345c2842SMi Jinlong 2087345c2842SMi Jinlong nfs4_lock_state(); 2088345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2089345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2090345c2842SMi Jinlong 2091345c2842SMi Jinlong if (conf) { 2092345c2842SMi Jinlong clp = conf; 2093345c2842SMi Jinlong 2094345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 2095345c2842SMi Jinlong status = nfserr_clientid_busy; 2096345c2842SMi Jinlong goto out; 2097345c2842SMi Jinlong } 2098345c2842SMi Jinlong 2099345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2100345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2101345c2842SMi Jinlong status = nfserr_clientid_busy; 2102345c2842SMi Jinlong goto out; 2103345c2842SMi Jinlong } 2104345c2842SMi Jinlong } else if (unconf) 2105345c2842SMi Jinlong clp = unconf; 2106345c2842SMi Jinlong else { 2107345c2842SMi Jinlong status = nfserr_stale_clientid; 2108345c2842SMi Jinlong goto out; 2109345c2842SMi Jinlong } 2110345c2842SMi Jinlong 2111345c2842SMi Jinlong expire_client(clp); 2112345c2842SMi Jinlong out: 2113345c2842SMi Jinlong nfs4_unlock_state(); 2114345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2115345c2842SMi Jinlong return status; 2116345c2842SMi Jinlong } 2117345c2842SMi Jinlong 2118069b6ad4SAndy Adamson __be32 21194dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21204dc6ec00SJ. Bruce Fields { 212157b7b43bSJ. Bruce Fields __be32 status = 0; 2122bcecf1ccSMi Jinlong 21234dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21244dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21254dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21264dc6ec00SJ. Bruce Fields /* 21274dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21284dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21294dc6ec00SJ. Bruce Fields */ 21304dc6ec00SJ. Bruce Fields return nfs_ok; 21314dc6ec00SJ. Bruce Fields } 2132bcecf1ccSMi Jinlong 21334dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2134bcecf1ccSMi Jinlong status = nfserr_complete_already; 2135a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2136a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2137bcecf1ccSMi Jinlong goto out; 2138bcecf1ccSMi Jinlong 2139bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2140bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21414dc6ec00SJ. Bruce Fields /* 21424dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21434dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21444dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21454dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21464dc6ec00SJ. Bruce Fields * client. 21474dc6ec00SJ. Bruce Fields */ 2148bcecf1ccSMi Jinlong goto out; 2149bcecf1ccSMi Jinlong 2150bcecf1ccSMi Jinlong status = nfs_ok; 21512a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2152bcecf1ccSMi Jinlong out: 21534dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2154bcecf1ccSMi Jinlong return status; 21554dc6ec00SJ. Bruce Fields } 21564dc6ec00SJ. Bruce Fields 21574dc6ec00SJ. Bruce Fields __be32 2158b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2159b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21601da177e4SLinus Torvalds { 2161a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21621da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21631da177e4SLinus Torvalds unsigned int strhashval; 216428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2165b37ad28bSAl Viro __be32 status; 2166a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21671da177e4SLinus Torvalds 2168a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2169a55370a3SNeilBrown if (status) 217073aea4ecSNeil Brown return status; 2171a55370a3SNeilBrown 2172a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21731da177e4SLinus Torvalds 217463db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 21751da177e4SLinus Torvalds nfs4_lock_state(); 2176e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 217728ce6054SNeilBrown if (conf) { 217863db4632SJ. Bruce Fields /* case 0: */ 21791da177e4SLinus Torvalds status = nfserr_clid_inuse; 2180e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2181e203d506SJ. Bruce Fields goto out; 2182026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2183363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2184363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2185363168b4SJeff Layton sizeof(addr_str)); 2186026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2187363168b4SJeff Layton "at %s\n", addr_str); 21881da177e4SLinus Torvalds goto out; 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds } 2191e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21923e772463SJ. Bruce Fields status = nfserr_jukebox; 21931da177e4SLinus Torvalds if (!conf) { 219463db4632SJ. Bruce Fields /* case 4: placed first, because it's the normal case */ 21951da177e4SLinus Torvalds if (unconf) 21961da177e4SLinus Torvalds expire_client(unconf); 2197b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2198a55370a3SNeilBrown if (new == NULL) 21991da177e4SLinus Torvalds goto out; 22001da177e4SLinus Torvalds gen_clid(new); 2201599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 220263db4632SJ. Bruce Fields /* case 1: probable callback update */ 220331f4a6c1SNeilBrown if (unconf) { 220431f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 220531f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 220631f4a6c1SNeilBrown * This has the advantage that there is at most 220731f4a6c1SNeilBrown * one {*x***} in either list at any time. 220831f4a6c1SNeilBrown */ 22091da177e4SLinus Torvalds expire_client(unconf); 22101da177e4SLinus Torvalds } 2211b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2212a55370a3SNeilBrown if (new == NULL) 22131da177e4SLinus Torvalds goto out; 22141da177e4SLinus Torvalds copy_clid(new, conf); 2215ad72aae5SJ. Bruce Fields } else { /* conf && !same_verf(): */ 2216ad72aae5SJ. Bruce Fields /* cases 2, 3: probable client reboot: */ 2217ad72aae5SJ. Bruce Fields if (unconf) 22181da177e4SLinus Torvalds expire_client(unconf); 2219b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2220a55370a3SNeilBrown if (new == NULL) 22211da177e4SLinus Torvalds goto out; 22221da177e4SLinus Torvalds gen_clid(new); 22231da177e4SLinus Torvalds } 22248323c3b2SJ. Bruce Fields /* 22258323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22268323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22278323c3b2SJ. Bruce Fields */ 22288323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22296f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2230c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22311da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22321da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22331da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22341da177e4SLinus Torvalds status = nfs_ok; 22351da177e4SLinus Torvalds out: 22361da177e4SLinus Torvalds nfs4_unlock_state(); 22371da177e4SLinus Torvalds return status; 22381da177e4SLinus Torvalds } 22391da177e4SLinus Torvalds 22401da177e4SLinus Torvalds 2241b37ad28bSAl Viro __be32 2242b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2243b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2244b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22451da177e4SLinus Torvalds { 224621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22471da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22481da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2249b37ad28bSAl Viro __be32 status; 22501da177e4SLinus Torvalds 22511da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22521da177e4SLinus Torvalds return nfserr_stale_clientid; 22531da177e4SLinus Torvalds /* 22541da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 22551da177e4SLinus Torvalds * We get here on a DRC miss. 22561da177e4SLinus Torvalds */ 22571da177e4SLinus Torvalds 22581da177e4SLinus Torvalds nfs4_lock_state(); 225921ab45a4SNeilBrown 226021ab45a4SNeilBrown conf = find_confirmed_client(clid); 226121ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 226221ab45a4SNeilBrown 226363db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 2264f07ea10dSChuck Lever status = nfserr_clid_inuse; 2265366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 226663db4632SJ. Bruce Fields /* case 1: callback update */ 2267599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22681da177e4SLinus Torvalds status = nfserr_clid_inuse; 22691da177e4SLinus Torvalds else { 22705a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22715a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22721a69c179SNeilBrown expire_client(unconf); 22731da177e4SLinus Torvalds status = nfs_ok; 22741da177e4SLinus Torvalds } 2275f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 227663db4632SJ. Bruce Fields /* case 2: probable retransmit: */ 2277599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22781da177e4SLinus Torvalds status = nfserr_clid_inuse; 227921ab45a4SNeilBrown else 22801da177e4SLinus Torvalds status = nfs_ok; 22817c79f737SNeilBrown } else if (!conf && unconf 2282599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 228363db4632SJ. Bruce Fields /* case 3: normal case; new or rebooted client */ 2284599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22851da177e4SLinus Torvalds status = nfserr_clid_inuse; 22861da177e4SLinus Torvalds } else { 22871a69c179SNeilBrown unsigned int hash = 22881a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22891a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2290e203d506SJ. Bruce Fields hash); 22911a69c179SNeilBrown if (conf) { 22922a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22931a69c179SNeilBrown expire_client(conf); 22941a69c179SNeilBrown } 22951da177e4SLinus Torvalds move_to_confirmed(unconf); 229621ab45a4SNeilBrown conf = unconf; 22975a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22981a69c179SNeilBrown status = nfs_ok; 22991da177e4SLinus Torvalds } 2300e98479b8SJ. Bruce Fields } else if ((!conf || !same_verf(&conf->cl_confirm, &confirm)) 2301e98479b8SJ. Bruce Fields && (!unconf || !same_verf(&unconf->cl_confirm, &confirm))) { 230263db4632SJ. Bruce Fields /* case 4: client hasn't noticed we rebooted yet? */ 23031da177e4SLinus Torvalds status = nfserr_stale_clientid; 230408e8987cSNeilBrown } 2305f07ea10dSChuck Lever 23061da177e4SLinus Torvalds nfs4_unlock_state(); 23071da177e4SLinus Torvalds return status; 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds 231032513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 23111da177e4SLinus Torvalds { 231232513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 231332513b40SJ. Bruce Fields } 231432513b40SJ. Bruce Fields 231532513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 231632513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 231732513b40SJ. Bruce Fields { 23181da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23191da177e4SLinus Torvalds 23208b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 23211da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 23228beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 23238beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 23241da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 232547f9940cSMeelap Shah fp->fi_had_conflict = false; 2326acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2327f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2328f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 232947cee541SPavel Emelyanov spin_lock(&recall_lock); 233047cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 233147cee541SPavel Emelyanov spin_unlock(&recall_lock); 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds static void 2335e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2336e60d4398SNeilBrown { 2337e60d4398SNeilBrown if (*slab == NULL) 2338e60d4398SNeilBrown return; 23391a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2340e60d4398SNeilBrown *slab = NULL; 2341e60d4398SNeilBrown } 2342e60d4398SNeilBrown 2343e8ff2a84SJ. Bruce Fields void 2344e60d4398SNeilBrown nfsd4_free_slabs(void) 2345e60d4398SNeilBrown { 2346fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2347fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2348e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23495ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23505b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2351e60d4398SNeilBrown } 23521da177e4SLinus Torvalds 235372083396SBryan Schumaker int 23541da177e4SLinus Torvalds nfsd4_init_slabs(void) 23551da177e4SLinus Torvalds { 2356fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2357fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2358fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2359fe0750e5SJ. Bruce Fields goto out_nomem; 2360fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2361fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2362fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2363e60d4398SNeilBrown goto out_nomem; 2364e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 236520c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2366e60d4398SNeilBrown if (file_slab == NULL) 2367e60d4398SNeilBrown goto out_nomem; 23685ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2369dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23705ac049acSNeilBrown if (stateid_slab == NULL) 23715ac049acSNeilBrown goto out_nomem; 23725b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 237320c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23745b2d21c1SNeilBrown if (deleg_slab == NULL) 23755b2d21c1SNeilBrown goto out_nomem; 2376e60d4398SNeilBrown return 0; 2377e60d4398SNeilBrown out_nomem: 2378e60d4398SNeilBrown nfsd4_free_slabs(); 23791da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23801da177e4SLinus Torvalds return -ENOMEM; 23811da177e4SLinus Torvalds } 23821da177e4SLinus Torvalds 2383fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23841da177e4SLinus Torvalds { 2385fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2386fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2387fe0750e5SJ. Bruce Fields } 2388fe0750e5SJ. Bruce Fields 2389fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2390fe0750e5SJ. Bruce Fields { 2391fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2392fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23931da177e4SLinus Torvalds } 23941da177e4SLinus Torvalds 2395ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2396ff194bd9SJ. Bruce Fields { 2397ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2398ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2399ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2400ff194bd9SJ. Bruce Fields } 2401ff194bd9SJ. Bruce Fields 2402fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 24031da177e4SLinus Torvalds { 24041da177e4SLinus Torvalds struct nfs4_stateowner *sop; 24051da177e4SLinus Torvalds 2406fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2407ff194bd9SJ. Bruce Fields if (!sop) 2408ff194bd9SJ. Bruce Fields return NULL; 2409ff194bd9SJ. Bruce Fields 2410ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2411ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2412fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2413ff194bd9SJ. Bruce Fields return NULL; 2414ff194bd9SJ. Bruce Fields } 24151da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2416ff194bd9SJ. Bruce Fields 2417ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2418ff194bd9SJ. Bruce Fields sop->so_client = clp; 2419ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 24201da177e4SLinus Torvalds return sop; 24211da177e4SLinus Torvalds } 2422ff194bd9SJ. Bruce Fields 2423fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2424ff194bd9SJ. Bruce Fields { 242516bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2426fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 24271da177e4SLinus Torvalds } 24281da177e4SLinus Torvalds 2429fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24301da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2431fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 24321da177e4SLinus Torvalds 2433fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2434fe0750e5SJ. Bruce Fields if (!oo) 24351da177e4SLinus Torvalds return NULL; 2436fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2437fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2438d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2439fe0750e5SJ. Bruce Fields oo->oo_time = 0; 244038c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2441fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2442fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2443fe0750e5SJ. Bruce Fields return oo; 24441da177e4SLinus Torvalds } 24451da177e4SLinus Torvalds 2446996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2447fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2448d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24491da177e4SLinus Torvalds 2450996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2451ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2452fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24538beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2454fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 245513cd2184SNeilBrown get_nfs4_file(fp); 24561da177e4SLinus Torvalds stp->st_file = fp; 24571da177e4SLinus Torvalds stp->st_access_bmap = 0; 24581da177e4SLinus Torvalds stp->st_deny_bmap = 0; 245982c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2460ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24614c4cd222SNeilBrown stp->st_openstp = NULL; 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds 24641da177e4SLinus Torvalds static void 2465fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24661da177e4SLinus Torvalds { 2467fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24681da177e4SLinus Torvalds 2469fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2470fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24711da177e4SLinus Torvalds } 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds static int 2474599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2475599e0a22SJ. Bruce Fields clientid_t *clid) 2476599e0a22SJ. Bruce Fields { 2477599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2478599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2479599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 2482fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24831da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24841da177e4SLinus Torvalds { 2485a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2486a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24871da177e4SLinus Torvalds 248816bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 248916bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 249016bfdaafSJ. Bruce Fields continue; 2491a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2492a50d2ad1SJ. Bruce Fields oo = openowner(so); 2493a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2494a50d2ad1SJ. Bruce Fields return oo; 2495a50d2ad1SJ. Bruce Fields } 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds return NULL; 24981da177e4SLinus Torvalds } 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 25011da177e4SLinus Torvalds static struct nfs4_file * 25021da177e4SLinus Torvalds find_file(struct inode *ino) 25031da177e4SLinus Torvalds { 25041da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 25051da177e4SLinus Torvalds struct nfs4_file *fp; 25061da177e4SLinus Torvalds 25078b671b80SJ. Bruce Fields spin_lock(&recall_lock); 25081da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 250913cd2184SNeilBrown if (fp->fi_inode == ino) { 251013cd2184SNeilBrown get_nfs4_file(fp); 25118b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25121da177e4SLinus Torvalds return fp; 25131da177e4SLinus Torvalds } 251413cd2184SNeilBrown } 25158b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 25161da177e4SLinus Torvalds return NULL; 25171da177e4SLinus Torvalds } 25181da177e4SLinus Torvalds 25194f83aa30SJ. Bruce Fields /* 25201da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 25211da177e4SLinus Torvalds * WRITE with all zero or all one stateid 25221da177e4SLinus Torvalds */ 2523b37ad28bSAl Viro static __be32 25241da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 25251da177e4SLinus Torvalds { 25261da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25271da177e4SLinus Torvalds struct nfs4_file *fp; 2528dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2529b37ad28bSAl Viro __be32 ret; 25301da177e4SLinus Torvalds 25311da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 25321da177e4SLinus Torvalds 25331da177e4SLinus Torvalds fp = find_file(ino); 253413cd2184SNeilBrown if (!fp) 253513cd2184SNeilBrown return nfs_ok; 2536b700949bSNeilBrown ret = nfserr_locked; 25371da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25388beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2539ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2540ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 254113cd2184SNeilBrown goto out; 25421da177e4SLinus Torvalds } 254313cd2184SNeilBrown ret = nfs_ok; 254413cd2184SNeilBrown out: 254513cd2184SNeilBrown put_nfs4_file(fp); 254613cd2184SNeilBrown return ret; 25471da177e4SLinus Torvalds } 25481da177e4SLinus Torvalds 25496b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25501da177e4SLinus Torvalds { 25511da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25521da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25531da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25541da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25551da177e4SLinus Torvalds * it's safe to take a reference: */ 25561da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25571da177e4SLinus Torvalds 25581da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25591da177e4SLinus Torvalds 2560460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25611da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25621da177e4SLinus Torvalds 25636b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25646b57d9c8SJ. Bruce Fields } 25656b57d9c8SJ. Bruce Fields 2566acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25676b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25686b57d9c8SJ. Bruce Fields { 2569acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2570acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25716b57d9c8SJ. Bruce Fields 2572acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2573acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2574acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25750272e1fdSJ. Bruce Fields /* 25760272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2577acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25786b57d9c8SJ. Bruce Fields * in time: 25790272e1fdSJ. Bruce Fields */ 25800272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25811da177e4SLinus Torvalds 25825d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2583acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2584acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25855d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25865d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25871da177e4SLinus Torvalds } 25881da177e4SLinus Torvalds 25891da177e4SLinus Torvalds static 25901da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25911da177e4SLinus Torvalds { 25921da177e4SLinus Torvalds if (arg & F_UNLCK) 25931da177e4SLinus Torvalds return lease_modify(onlist, arg); 25941da177e4SLinus Torvalds else 25951da177e4SLinus Torvalds return -EAGAIN; 25961da177e4SLinus Torvalds } 25971da177e4SLinus Torvalds 25987b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25998fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 26008fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 26011da177e4SLinus Torvalds }; 26021da177e4SLinus Torvalds 26037a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 26047a8711c9SJ. Bruce Fields { 26057a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 26067a8711c9SJ. Bruce Fields return nfs_ok; 26077a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 26087a8711c9SJ. Bruce Fields return nfserr_replay_me; 26097a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 26107a8711c9SJ. Bruce Fields return nfs_ok; 26117a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 26127a8711c9SJ. Bruce Fields } 26131da177e4SLinus Torvalds 2614b37ad28bSAl Viro __be32 26156668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 26166668958fSAndy Adamson struct nfsd4_open *open) 26171da177e4SLinus Torvalds { 26181da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 26191da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 26201da177e4SLinus Torvalds unsigned int strhashval; 2621fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 26224cdc951bSJ. Bruce Fields __be32 status; 26231da177e4SLinus Torvalds 26241da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 26251da177e4SLinus Torvalds return nfserr_stale_clientid; 262632513b40SJ. Bruce Fields /* 262732513b40SJ. Bruce Fields * In case we need it later, after we've already created the 262832513b40SJ. Bruce Fields * file and don't want to risk a further failure: 262932513b40SJ. Bruce Fields */ 263032513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 263132513b40SJ. Bruce Fields if (open->op_file == NULL) 263232513b40SJ. Bruce Fields return nfserr_jukebox; 26331da177e4SLinus Torvalds 263416bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2635fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2636fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2637fe0750e5SJ. Bruce Fields if (!oo) { 26380f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26390f442aa2SJ. Bruce Fields if (clp == NULL) 26400f442aa2SJ. Bruce Fields return nfserr_expired; 2641bcf130f9SJ. Bruce Fields goto new_owner; 26420f442aa2SJ. Bruce Fields } 2643dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26440f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2645fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2646fe0750e5SJ. Bruce Fields release_openowner(oo); 2647fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2648bcf130f9SJ. Bruce Fields goto new_owner; 26490f442aa2SJ. Bruce Fields } 26504cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26514cdc951bSJ. Bruce Fields if (status) 26524cdc951bSJ. Bruce Fields return status; 26534cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26544cdc951bSJ. Bruce Fields goto alloc_stateid; 2655bcf130f9SJ. Bruce Fields new_owner: 2656fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2657fe0750e5SJ. Bruce Fields if (oo == NULL) 26583e772463SJ. Bruce Fields return nfserr_jukebox; 2659fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26604cdc951bSJ. Bruce Fields alloc_stateid: 26614cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26624cdc951bSJ. Bruce Fields if (!open->op_stp) 26634cdc951bSJ. Bruce Fields return nfserr_jukebox; 26640f442aa2SJ. Bruce Fields return nfs_ok; 26651da177e4SLinus Torvalds } 26661da177e4SLinus Torvalds 2667b37ad28bSAl Viro static inline __be32 26684a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26694a6e43e6SNeilBrown { 26704a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26714a6e43e6SNeilBrown return nfserr_openmode; 26724a6e43e6SNeilBrown else 26734a6e43e6SNeilBrown return nfs_ok; 26744a6e43e6SNeilBrown } 26754a6e43e6SNeilBrown 2676c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 267724a0111eSJ. Bruce Fields { 267824a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 267924a0111eSJ. Bruce Fields } 268024a0111eSJ. Bruce Fields 268138c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2682f459e453SJ. Bruce Fields { 2683f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2684f459e453SJ. Bruce Fields 268538c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2686f459e453SJ. Bruce Fields if (!ret) 2687f459e453SJ. Bruce Fields return NULL; 2688f459e453SJ. Bruce Fields return delegstateid(ret); 2689f459e453SJ. Bruce Fields } 2690f459e453SJ. Bruce Fields 26918b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26928b289b2cSJ. Bruce Fields { 26938b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26948b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26958b289b2cSJ. Bruce Fields } 26968b289b2cSJ. Bruce Fields 2697b37ad28bSAl Viro static __be32 269838c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2699567d9829SNeilBrown struct nfs4_delegation **dp) 2700567d9829SNeilBrown { 2701567d9829SNeilBrown int flags; 2702b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2703567d9829SNeilBrown 270438c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2705567d9829SNeilBrown if (*dp == NULL) 2706c44c5eebSNeilBrown goto out; 270724a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2708567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2709567d9829SNeilBrown if (status) 2710567d9829SNeilBrown *dp = NULL; 2711c44c5eebSNeilBrown out: 27128b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2713c44c5eebSNeilBrown return nfs_ok; 2714c44c5eebSNeilBrown if (status) 2715c44c5eebSNeilBrown return status; 2716dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2717c44c5eebSNeilBrown return nfs_ok; 2718567d9829SNeilBrown } 2719567d9829SNeilBrown 2720b37ad28bSAl Viro static __be32 2721dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 27221da177e4SLinus Torvalds { 2723dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2724fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 27251da177e4SLinus Torvalds 27268beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 27271da177e4SLinus Torvalds /* ignore lock owners */ 27281da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 27291da177e4SLinus Torvalds continue; 27301da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2731fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 27321da177e4SLinus Torvalds *stpp = local; 27331da177e4SLinus Torvalds /* check for conflicting share reservations */ 27341da177e4SLinus Torvalds if (!test_share(local, open)) 273577eaae8dSJ. Bruce Fields return nfserr_share_denied; 27361da177e4SLinus Torvalds } 273777eaae8dSJ. Bruce Fields return nfs_ok; 27381da177e4SLinus Torvalds } 27391da177e4SLinus Torvalds 2740996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2741996e0938SJ. Bruce Fields { 2742996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27435ac049acSNeilBrown } 27445ac049acSNeilBrown 274521fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 274621fb4016SJ. Bruce Fields { 274721fb4016SJ. Bruce Fields int flags = 0; 274821fb4016SJ. Bruce Fields 274921fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 275021fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 275121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 275221fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 275321fb4016SJ. Bruce Fields return flags; 275421fb4016SJ. Bruce Fields } 275521fb4016SJ. Bruce Fields 27560c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27570c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2758f9d7562fSJ. Bruce Fields { 2759f9d7562fSJ. Bruce Fields __be32 status; 27600c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27610c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27620c12eaffSCasey Bodley 2763f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2764f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2765f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2766f9d7562fSJ. Bruce Fields if (status) 2767f9d7562fSJ. Bruce Fields return status; 2768f9d7562fSJ. Bruce Fields } 2769f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2770f9d7562fSJ. Bruce Fields 2771f9d7562fSJ. Bruce Fields return nfs_ok; 2772f9d7562fSJ. Bruce Fields } 2773f9d7562fSJ. Bruce Fields 2774b37ad28bSAl Viro static inline __be32 27751da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27761da177e4SLinus Torvalds struct nfsd4_open *open) 27771da177e4SLinus Torvalds { 27781da177e4SLinus Torvalds struct iattr iattr = { 27791da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27801da177e4SLinus Torvalds .ia_size = 0, 27811da177e4SLinus Torvalds }; 27821da177e4SLinus Torvalds if (!open->op_truncate) 27831da177e4SLinus Torvalds return 0; 27841da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27859246585aSAl Viro return nfserr_inval; 27861da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27871da177e4SLinus Torvalds } 27881da177e4SLinus Torvalds 2789b37ad28bSAl Viro static __be32 2790dcef0413SJ. 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) 27911da177e4SLinus Torvalds { 2792b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27937d947842SJ. Bruce Fields bool new_access; 2794b37ad28bSAl Viro __be32 status; 27951da177e4SLinus Torvalds 279682c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2797f9d7562fSJ. Bruce Fields if (new_access) { 27980c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2799f9d7562fSJ. Bruce Fields if (status) 2800f9d7562fSJ. Bruce Fields return status; 28016c26d08fSJ. Bruce Fields } 28021da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 28031da177e4SLinus Torvalds if (status) { 2804f9d7562fSJ. Bruce Fields if (new_access) { 2805f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2806f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2807f9d7562fSJ. Bruce Fields } 28081da177e4SLinus Torvalds return status; 28091da177e4SLinus Torvalds } 28101da177e4SLinus Torvalds /* remember the open */ 281182c5ff1bSJeff Layton set_access(op_share_access, stp); 2812ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 28131da177e4SLinus Torvalds 28141da177e4SLinus Torvalds return nfs_ok; 28151da177e4SLinus Torvalds } 28161da177e4SLinus Torvalds 28171da177e4SLinus Torvalds 28181da177e4SLinus Torvalds static void 28191255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 28201da177e4SLinus Torvalds { 2821dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 28221da177e4SLinus Torvalds } 28231da177e4SLinus Torvalds 282414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 282514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 282614a24e99SJ. Bruce Fields { 282714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 282814a24e99SJ. Bruce Fields return true; 282914a24e99SJ. Bruce Fields /* 283014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 283114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 283214a24e99SJ. Bruce Fields * until we hear otherwise: 283314a24e99SJ. Bruce Fields */ 283414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 283514a24e99SJ. Bruce Fields } 283614a24e99SJ. Bruce Fields 283722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 283822d38c4cSJ. Bruce Fields { 283922d38c4cSJ. Bruce Fields struct file_lock *fl; 284022d38c4cSJ. Bruce Fields 284122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 284222d38c4cSJ. Bruce Fields if (!fl) 284322d38c4cSJ. Bruce Fields return NULL; 284422d38c4cSJ. Bruce Fields locks_init_lock(fl); 284522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 284622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 284722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 284822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2849acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 285022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 285122d38c4cSJ. Bruce Fields return fl; 285222d38c4cSJ. Bruce Fields } 285322d38c4cSJ. Bruce Fields 2854edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2855edab9782SJ. Bruce Fields { 2856acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2857edab9782SJ. Bruce Fields struct file_lock *fl; 2858edab9782SJ. Bruce Fields int status; 2859edab9782SJ. Bruce Fields 2860edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2861edab9782SJ. Bruce Fields if (!fl) 2862edab9782SJ. Bruce Fields return -ENOMEM; 2863acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28642a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2865acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2866edab9782SJ. Bruce Fields if (status) { 2867acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2868edab9782SJ. Bruce Fields locks_free_lock(fl); 2869edab9782SJ. Bruce Fields return -ENOMEM; 2870edab9782SJ. Bruce Fields } 2871acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2872acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2873acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2874acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2875acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2876acfdf5c3SJ. Bruce Fields return 0; 2877acfdf5c3SJ. Bruce Fields } 2878acfdf5c3SJ. Bruce Fields 2879acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2880acfdf5c3SJ. Bruce Fields { 2881acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2882acfdf5c3SJ. Bruce Fields 2883acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2884acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2885acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2886acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2887acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2888acfdf5c3SJ. Bruce Fields return -EAGAIN; 2889acfdf5c3SJ. Bruce Fields } 2890acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2891acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2892acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28932a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2894edab9782SJ. Bruce Fields return 0; 2895edab9782SJ. Bruce Fields } 2896edab9782SJ. Bruce Fields 28974aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28984aa8913cSBenny Halevy { 28994aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 29004aa8913cSBenny Halevy if (status == -EAGAIN) 29014aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 29024aa8913cSBenny Halevy else { 29034aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 29044aa8913cSBenny Halevy switch (open->op_deleg_want) { 29054aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 29064aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 29074aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 29084aa8913cSBenny Halevy break; 29094aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 29104aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 29114aa8913cSBenny Halevy break; 29124aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 29134aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 29144aa8913cSBenny Halevy } 29154aa8913cSBenny Halevy } 29164aa8913cSBenny Halevy } 29174aa8913cSBenny Halevy 29181da177e4SLinus Torvalds /* 29191da177e4SLinus Torvalds * Attempt to hand out a delegation. 29201da177e4SLinus Torvalds */ 29211da177e4SLinus Torvalds static void 2922dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 29231da177e4SLinus Torvalds { 29241da177e4SLinus Torvalds struct nfs4_delegation *dp; 2925fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 292614a24e99SJ. Bruce Fields int cb_up; 2927d24433cdSBenny Halevy int status = 0, flag = 0; 29281da177e4SLinus Torvalds 2929fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 29301da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 29317b190fecSNeilBrown open->op_recall = 0; 29327b190fecSNeilBrown switch (open->op_claim_type) { 29337b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 29342bf23875SJ. Bruce Fields if (!cb_up) 29357b190fecSNeilBrown open->op_recall = 1; 29367b190fecSNeilBrown flag = open->op_delegate_type; 29377b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29381da177e4SLinus Torvalds goto out; 29397b190fecSNeilBrown break; 29407b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29417b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29427b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2943af558e33SJ. Bruce Fields if (locks_in_grace()) 29447b190fecSNeilBrown goto out; 2945dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29467b190fecSNeilBrown goto out; 29471da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29481da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29491da177e4SLinus Torvalds else 29501da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29517b190fecSNeilBrown break; 29527b190fecSNeilBrown default: 29537b190fecSNeilBrown goto out; 29547b190fecSNeilBrown } 29551da177e4SLinus Torvalds 2956fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2957dd239cc0SJ. Bruce Fields if (dp == NULL) 2958dd239cc0SJ. Bruce Fields goto out_no_deleg; 2959acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2960edab9782SJ. Bruce Fields if (status) 2961dd239cc0SJ. Bruce Fields goto out_free; 29621da177e4SLinus Torvalds 2963d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29641da177e4SLinus Torvalds 29658c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2966d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29671da177e4SLinus Torvalds out: 29681da177e4SLinus Torvalds open->op_delegate_type = flag; 2969d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2970d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2971d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2972d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2973d24433cdSBenny Halevy 29744aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29754aa8913cSBenny Halevy if (open->op_deleg_want) 29764aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2977d24433cdSBenny Halevy } 2978dd239cc0SJ. Bruce Fields return; 2979dd239cc0SJ. Bruce Fields out_free: 2980acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2981dd239cc0SJ. Bruce Fields out_no_deleg: 2982dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2983dd239cc0SJ. Bruce Fields goto out; 29841da177e4SLinus Torvalds } 29851da177e4SLinus Torvalds 2986e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2987e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2988e27f49c3SBenny Halevy { 2989e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2990e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2991e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2992e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2993e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2994e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2995e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2996e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2997e27f49c3SBenny Halevy } 2998e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2999e27f49c3SBenny Halevy * it already has, therefore we don't return 3000e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3001e27f49c3SBenny Halevy */ 3002e27f49c3SBenny Halevy } 3003e27f49c3SBenny Halevy 30041da177e4SLinus Torvalds /* 30051da177e4SLinus Torvalds * called with nfs4_lock_state() held. 30061da177e4SLinus Torvalds */ 3007b37ad28bSAl Viro __be32 30081da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 30091da177e4SLinus Torvalds { 30106668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 301138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 30121da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 30131da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3014dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 3015567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 3016b37ad28bSAl Viro __be32 status; 30171da177e4SLinus Torvalds 30181da177e4SLinus Torvalds /* 30191da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 30201da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 30211da177e4SLinus Torvalds * If not found, create the nfs4_file struct 30221da177e4SLinus Torvalds */ 30231da177e4SLinus Torvalds fp = find_file(ino); 30241da177e4SLinus Torvalds if (fp) { 30251da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 30261da177e4SLinus Torvalds goto out; 302738c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 3028c44c5eebSNeilBrown if (status) 3029c44c5eebSNeilBrown goto out; 30301da177e4SLinus Torvalds } else { 3031c44c5eebSNeilBrown status = nfserr_bad_stateid; 30328b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 3033c44c5eebSNeilBrown goto out; 30343e772463SJ. Bruce Fields status = nfserr_jukebox; 303532513b40SJ. Bruce Fields fp = open->op_file; 303632513b40SJ. Bruce Fields open->op_file = NULL; 303732513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30381da177e4SLinus Torvalds } 30391da177e4SLinus Torvalds 30401da177e4SLinus Torvalds /* 30411da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30421da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30431da177e4SLinus Torvalds */ 30441da177e4SLinus Torvalds if (stp) { 30451da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3046f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30471da177e4SLinus Torvalds if (status) 30481da177e4SLinus Torvalds goto out; 30491da177e4SLinus Torvalds } else { 30504cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3051567d9829SNeilBrown if (status) 30521da177e4SLinus Torvalds goto out; 30534cdc951bSJ. Bruce Fields stp = open->op_stp; 30544cdc951bSJ. Bruce Fields open->op_stp = NULL; 3055996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30561da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30571da177e4SLinus Torvalds if (status) { 30582283963fSJ. Bruce Fields release_open_stateid(stp); 30591da177e4SLinus Torvalds goto out; 30601da177e4SLinus Torvalds } 30611da177e4SLinus Torvalds } 3062dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3063dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30641da177e4SLinus Torvalds 3065d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3066dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30676668958fSAndy Adamson 3068d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3069d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3070d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3071d24433cdSBenny Halevy goto nodeleg; 3072d24433cdSBenny Halevy } 3073d24433cdSBenny Halevy } 3074d24433cdSBenny Halevy 30751da177e4SLinus Torvalds /* 30761da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30771da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30781da177e4SLinus Torvalds */ 30791da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3080d24433cdSBenny Halevy nodeleg: 30811da177e4SLinus Torvalds status = nfs_ok; 30821da177e4SLinus Torvalds 30838c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3084dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30851da177e4SLinus Torvalds out: 3086d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3087d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3088e27f49c3SBenny Halevy open->op_deleg_want) 3089e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3090d24433cdSBenny Halevy 309113cd2184SNeilBrown if (fp) 309213cd2184SNeilBrown put_nfs4_file(fp); 309337515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30941255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30951da177e4SLinus Torvalds /* 30961da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30971da177e4SLinus Torvalds */ 30981da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3099dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 31006668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 31011da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 31021da177e4SLinus Torvalds 31031da177e4SLinus Torvalds return status; 31041da177e4SLinus Torvalds } 31051da177e4SLinus Torvalds 3106d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3107d29b20cdSJ. Bruce Fields { 3108d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3109d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3110d29b20cdSJ. Bruce Fields 3111d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3112d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3113d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3114d29b20cdSJ. Bruce Fields if (status) { 3115d29b20cdSJ. Bruce Fields release_openowner(oo); 3116d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3117d29b20cdSJ. Bruce Fields } else 3118d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3119d29b20cdSJ. Bruce Fields } 3120d29b20cdSJ. Bruce Fields } 312132513b40SJ. Bruce Fields if (open->op_file) 312232513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 31234cdc951bSJ. Bruce Fields if (open->op_stp) 31244cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3125d29b20cdSJ. Bruce Fields } 3126d29b20cdSJ. Bruce Fields 3127b37ad28bSAl Viro __be32 3128b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3129b591480bSJ.Bruce Fields clientid_t *clid) 31301da177e4SLinus Torvalds { 31311da177e4SLinus Torvalds struct nfs4_client *clp; 3132b37ad28bSAl Viro __be32 status; 31331da177e4SLinus Torvalds 31341da177e4SLinus Torvalds nfs4_lock_state(); 31351da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 31361da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 31371da177e4SLinus Torvalds status = nfserr_stale_clientid; 31381da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31391da177e4SLinus Torvalds goto out; 31401da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31411da177e4SLinus Torvalds status = nfserr_expired; 31421da177e4SLinus Torvalds if (clp == NULL) { 31431da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31441da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31451da177e4SLinus Torvalds goto out; 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds status = nfserr_cb_path_down; 3148ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 314977a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31501da177e4SLinus Torvalds goto out; 31511da177e4SLinus Torvalds status = nfs_ok; 31521da177e4SLinus Torvalds out: 31531da177e4SLinus Torvalds nfs4_unlock_state(); 31541da177e4SLinus Torvalds return status; 31551da177e4SLinus Torvalds } 31561da177e4SLinus Torvalds 3157c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3158af558e33SJ. Bruce Fields }; 3159af558e33SJ. Bruce Fields 316033dcc481SJeff Layton static bool grace_ended; 316133dcc481SJeff Layton 3162a76b4319SNeilBrown static void 3163af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3164a76b4319SNeilBrown { 316533dcc481SJeff Layton /* do nothing if grace period already ended */ 316633dcc481SJeff Layton if (grace_ended) 316733dcc481SJeff Layton return; 316833dcc481SJeff Layton 3169a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 317033dcc481SJeff Layton grace_ended = true; 31712a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3172af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3173e46b498cSJ. Bruce Fields /* 3174e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3175e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3176e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3177e46b498cSJ. Bruce Fields */ 3178e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3179a76b4319SNeilBrown } 3180a76b4319SNeilBrown 3181fd39ca9aSNeilBrown static time_t 31821da177e4SLinus Torvalds nfs4_laundromat(void) 31831da177e4SLinus Torvalds { 31841da177e4SLinus Torvalds struct nfs4_client *clp; 3185fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31861da177e4SLinus Torvalds struct nfs4_delegation *dp; 31871da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3188cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3189cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3190cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31911da177e4SLinus Torvalds 31921da177e4SLinus Torvalds nfs4_lock_state(); 31931da177e4SLinus Torvalds 31941da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3195af558e33SJ. Bruce Fields nfsd4_end_grace(); 319636acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 319736acb66bSBenny Halevy spin_lock(&client_lock); 31981da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31991da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 32001da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 32011da177e4SLinus Torvalds t = clp->cl_time - cutoff; 32021da177e4SLinus Torvalds if (clientid_val > t) 32031da177e4SLinus Torvalds clientid_val = t; 32041da177e4SLinus Torvalds break; 32051da177e4SLinus Torvalds } 3206d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3207d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3208d7682988SBenny Halevy clp->cl_clientid.cl_id); 3209d7682988SBenny Halevy continue; 3210d7682988SBenny Halevy } 3211d7682988SBenny Halevy unhash_client_locked(clp); 3212d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 321336acb66bSBenny Halevy } 321436acb66bSBenny Halevy spin_unlock(&client_lock); 321536acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 321636acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 32171da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 32181da177e4SLinus Torvalds clp->cl_clientid.cl_id); 32192a4317c5SJeff Layton nfsd4_client_record_remove(clp); 32201da177e4SLinus Torvalds expire_client(clp); 32211da177e4SLinus Torvalds } 32221da177e4SLinus Torvalds spin_lock(&recall_lock); 32231da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32241da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32251da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 32261da177e4SLinus Torvalds u = dp->dl_time - cutoff; 32271da177e4SLinus Torvalds if (test_val > u) 32281da177e4SLinus Torvalds test_val = u; 32291da177e4SLinus Torvalds break; 32301da177e4SLinus Torvalds } 32311da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds spin_unlock(&recall_lock); 32341da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32351da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32361da177e4SLinus Torvalds unhash_delegation(dp); 32371da177e4SLinus Torvalds } 3238cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32391da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3240fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3241fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3242fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32431da177e4SLinus Torvalds if (test_val > u) 32441da177e4SLinus Torvalds test_val = u; 32451da177e4SLinus Torvalds break; 32461da177e4SLinus Torvalds } 3247fe0750e5SJ. Bruce Fields release_openowner(oo); 32481da177e4SLinus Torvalds } 32491da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32501da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32511da177e4SLinus Torvalds nfs4_unlock_state(); 32521da177e4SLinus Torvalds return clientid_val; 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds 3255a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3256a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3257a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3258a254b246SHarvey Harrison 3259a254b246SHarvey Harrison static void 3260c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32611da177e4SLinus Torvalds { 32621da177e4SLinus Torvalds time_t t; 32631da177e4SLinus Torvalds 32641da177e4SLinus Torvalds t = nfs4_laundromat(); 32651da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 326658da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32671da177e4SLinus Torvalds } 32681da177e4SLinus Torvalds 3269f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3270f8816512SNeilBrown { 3271f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3272f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3273f7a4d872SJ. Bruce Fields return nfs_ok; 32741da177e4SLinus Torvalds } 32751da177e4SLinus Torvalds 32761da177e4SLinus Torvalds static int 32771da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32781da177e4SLinus Torvalds { 3279d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3280e4e83ea4SJ. Bruce Fields return 0; 32818c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32828c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32831da177e4SLinus Torvalds return 1; 32841da177e4SLinus Torvalds } 32851da177e4SLinus Torvalds 32861da177e4SLinus Torvalds static inline int 328782c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32881da177e4SLinus Torvalds { 328982c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 329082c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 329182c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32921da177e4SLinus Torvalds } 32931da177e4SLinus Torvalds 32941da177e4SLinus Torvalds static inline int 329582c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32961da177e4SLinus Torvalds { 329782c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 329882c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32991da177e4SLinus Torvalds } 33001da177e4SLinus Torvalds 33011da177e4SLinus Torvalds static 3302dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 33031da177e4SLinus Torvalds { 3304b37ad28bSAl Viro __be32 status = nfserr_openmode; 33051da177e4SLinus Torvalds 330602921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 330702921914SJ. Bruce Fields if (stp->st_openstp) 330802921914SJ. Bruce Fields stp = stp->st_openstp; 330982c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 33101da177e4SLinus Torvalds goto out; 331182c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 33121da177e4SLinus Torvalds goto out; 33131da177e4SLinus Torvalds status = nfs_ok; 33141da177e4SLinus Torvalds out: 33151da177e4SLinus Torvalds return status; 33161da177e4SLinus Torvalds } 33171da177e4SLinus Torvalds 3318b37ad28bSAl Viro static inline __be32 33191da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 33201da177e4SLinus Torvalds { 3321203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 33221da177e4SLinus Torvalds return nfs_ok; 3323af558e33SJ. Bruce Fields else if (locks_in_grace()) { 332425985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 33251da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 33261da177e4SLinus Torvalds return nfserr_grace; 33271da177e4SLinus Torvalds } else if (flags & WR_STATE) 33281da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33291da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 33301da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 33311da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 33321da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 33331da177e4SLinus Torvalds } 33341da177e4SLinus Torvalds 33351da177e4SLinus Torvalds /* 33361da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 33371da177e4SLinus Torvalds * that are not able to provide mandatory locking. 33381da177e4SLinus Torvalds */ 33391da177e4SLinus Torvalds static inline int 334018f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33411da177e4SLinus Torvalds { 3342203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33431da177e4SLinus Torvalds } 33441da177e4SLinus Torvalds 334581b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 334681b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 334781b82965SJ. Bruce Fields { 334881b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 334981b82965SJ. Bruce Fields } 335081b82965SJ. Bruce Fields 335157b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33520836f587SJ. Bruce Fields { 33536668958fSAndy Adamson /* 33546668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33556668958fSAndy Adamson * when it is zero. 33566668958fSAndy Adamson */ 335728dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 335881b82965SJ. Bruce Fields return nfs_ok; 335981b82965SJ. Bruce Fields 336081b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 336181b82965SJ. Bruce Fields return nfs_ok; 33626668958fSAndy Adamson 33630836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 336481b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33650836f587SJ. Bruce Fields return nfserr_bad_stateid; 33660836f587SJ. Bruce Fields /* 336781b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 336881b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 336981b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 337081b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 337181b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 337281b82965SJ. Bruce Fields * but better performance may result in retrying IO that 337381b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 337481b82965SJ. Bruce Fields * reordered in flight: 33750836f587SJ. Bruce Fields */ 33760836f587SJ. Bruce Fields return nfserr_old_stateid; 33770836f587SJ. Bruce Fields } 33780836f587SJ. Bruce Fields 337938c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 338017456804SBryan Schumaker { 338197b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 338297b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 338397b7e3b6SJ. Bruce Fields __be32 status; 338417456804SBryan Schumaker 338517456804SBryan Schumaker if (STALE_STATEID(stateid)) 338697b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 338717456804SBryan Schumaker 338838c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 338997b7e3b6SJ. Bruce Fields if (!s) 339097b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 339136279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 339217456804SBryan Schumaker if (status) 339317456804SBryan Schumaker return status; 339497b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 339597b7e3b6SJ. Bruce Fields return nfs_ok; 339697b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 339797b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3398dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 339997b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 340097b7e3b6SJ. Bruce Fields return nfs_ok; 340117456804SBryan Schumaker } 340217456804SBryan Schumaker 340338c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 340438c2f4b1SJ. Bruce Fields { 340538c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 340638c2f4b1SJ. Bruce Fields 340738c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 340838c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 340938c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 341038c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 341138c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 341238c2f4b1SJ. Bruce Fields if (!cl) 341338c2f4b1SJ. Bruce Fields return nfserr_expired; 341438c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 341538c2f4b1SJ. Bruce Fields if (!*s) 341638c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 341738c2f4b1SJ. Bruce Fields return nfs_ok; 341838c2f4b1SJ. Bruce Fields 341938c2f4b1SJ. Bruce Fields } 342038c2f4b1SJ. Bruce Fields 34211da177e4SLinus Torvalds /* 34221da177e4SLinus Torvalds * Checks for stateid operations 34231da177e4SLinus Torvalds */ 3424b37ad28bSAl Viro __be32 3425dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3426dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 34271da177e4SLinus Torvalds { 342869064a27SJ. Bruce Fields struct nfs4_stid *s; 3429dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 34301da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3431dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34321da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3433b37ad28bSAl Viro __be32 status; 34341da177e4SLinus Torvalds 34351da177e4SLinus Torvalds if (filpp) 34361da177e4SLinus Torvalds *filpp = NULL; 34371da177e4SLinus Torvalds 343818f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34391da177e4SLinus Torvalds return nfserr_grace; 34401da177e4SLinus Torvalds 34411da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34421da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34431da177e4SLinus Torvalds 344438c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 344538c2f4b1SJ. Bruce Fields if (status) 344638c2f4b1SJ. Bruce Fields return status; 344769064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34480c2a498fSJ. Bruce Fields if (status) 34490c2a498fSJ. Bruce Fields goto out; 3450f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3451f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 345269064a27SJ. Bruce Fields dp = delegstateid(s); 3453dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3454dc9bf700SJ. Bruce Fields if (status) 3455dc9bf700SJ. Bruce Fields goto out; 345643b0178eSDan Carpenter if (filpp) { 3457acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3458f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 345943b0178eSDan Carpenter } 3460f7a4d872SJ. Bruce Fields break; 3461f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3462f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 346369064a27SJ. Bruce Fields stp = openlockstateid(s); 3464f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3465f7a4d872SJ. Bruce Fields if (status) 34661da177e4SLinus Torvalds goto out; 3467fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3468dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34691da177e4SLinus Torvalds goto out; 3470a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3471a4455be0SJ. Bruce Fields if (status) 34721da177e4SLinus Torvalds goto out; 3473f9d7562fSJ. Bruce Fields if (filpp) { 3474f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3475f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3476f9d7562fSJ. Bruce Fields else 3477f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3478f9d7562fSJ. Bruce Fields } 3479f7a4d872SJ. Bruce Fields break; 3480f7a4d872SJ. Bruce Fields default: 3481f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34821da177e4SLinus Torvalds } 34831da177e4SLinus Torvalds status = nfs_ok; 34841da177e4SLinus Torvalds out: 34851da177e4SLinus Torvalds return status; 34861da177e4SLinus Torvalds } 34871da177e4SLinus Torvalds 3488e1ca12dfSBryan Schumaker static __be32 3489dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3490e1ca12dfSBryan Schumaker { 3491fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3492e1ca12dfSBryan Schumaker return nfserr_locks_held; 3493e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3494e1ca12dfSBryan Schumaker return nfs_ok; 3495e1ca12dfSBryan Schumaker } 3496e1ca12dfSBryan Schumaker 3497e1ca12dfSBryan Schumaker /* 349817456804SBryan Schumaker * Test if the stateid is valid 349917456804SBryan Schumaker */ 350017456804SBryan Schumaker __be32 350117456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 350217456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 350317456804SBryan Schumaker { 350403cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 350503cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 350603cfb420SBryan Schumaker 350703cfb420SBryan Schumaker nfs4_lock_state(); 350803cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 350903cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 351003cfb420SBryan Schumaker nfs4_unlock_state(); 351103cfb420SBryan Schumaker 351217456804SBryan Schumaker return nfs_ok; 351317456804SBryan Schumaker } 351417456804SBryan Schumaker 3515e1ca12dfSBryan Schumaker __be32 3516e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3517e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3518e1ca12dfSBryan Schumaker { 3519e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 35202da1cec7SJ. Bruce Fields struct nfs4_stid *s; 352138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 35222da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3523e1ca12dfSBryan Schumaker 3524e1ca12dfSBryan Schumaker nfs4_lock_state(); 352538c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 35262da1cec7SJ. Bruce Fields if (!s) 3527e1ca12dfSBryan Schumaker goto out; 35282da1cec7SJ. Bruce Fields switch (s->sc_type) { 35292da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3530e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3531e1ca12dfSBryan Schumaker goto out; 35322da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35332da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35342da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35352da1cec7SJ. Bruce Fields if (ret) 3536e1ca12dfSBryan Schumaker goto out; 35372da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35382da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35392da1cec7SJ. Bruce Fields else 35402da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3541f7a4d872SJ. Bruce Fields break; 3542f7a4d872SJ. Bruce Fields default: 3543f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3544e1ca12dfSBryan Schumaker } 3545e1ca12dfSBryan Schumaker out: 3546e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3547e1ca12dfSBryan Schumaker return ret; 3548e1ca12dfSBryan Schumaker } 3549e1ca12dfSBryan Schumaker 35504c4cd222SNeilBrown static inline int 35514c4cd222SNeilBrown setlkflg (int type) 35524c4cd222SNeilBrown { 35534c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35544c4cd222SNeilBrown RD_STATE : WR_STATE; 35554c4cd222SNeilBrown } 35561da177e4SLinus Torvalds 3557dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3558c0a5d93eSJ. Bruce Fields { 3559c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3560c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3561c0a5d93eSJ. Bruce Fields __be32 status; 3562c0a5d93eSJ. Bruce Fields 3563c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3564c0a5d93eSJ. Bruce Fields if (status) 3565c0a5d93eSJ. Bruce Fields return status; 3566f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3567f7a4d872SJ. Bruce Fields /* 3568f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3569f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3570f7a4d872SJ. Bruce Fields */ 3571f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3572f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3573f7a4d872SJ. Bruce Fields if (status) 3574f7a4d872SJ. Bruce Fields return status; 3575f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3576c0a5d93eSJ. Bruce Fields } 3577c0a5d93eSJ. Bruce Fields 35781da177e4SLinus Torvalds /* 35791da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35801da177e4SLinus Torvalds */ 3581b37ad28bSAl Viro static __be32 3582dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35832288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3584dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35851da177e4SLinus Torvalds { 35860836f587SJ. Bruce Fields __be32 status; 358738c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35881da177e4SLinus Torvalds 35898c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35908c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35911da177e4SLinus Torvalds 35921da177e4SLinus Torvalds *stpp = NULL; 359338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3594c0a5d93eSJ. Bruce Fields if (status) 3595c0a5d93eSJ. Bruce Fields return status; 359638c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3597c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35981da177e4SLinus Torvalds 3599c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 36001da177e4SLinus Torvalds } 36011da177e4SLinus Torvalds 3602dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3603c0a5d93eSJ. Bruce Fields { 3604c0a5d93eSJ. Bruce Fields __be32 status; 3605c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 36061da177e4SLinus Torvalds 3607c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 36082288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 36090836f587SJ. Bruce Fields if (status) 36100836f587SJ. Bruce Fields return status; 3611c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3612dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3613c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 36143a4f98bbSNeilBrown return nfs_ok; 36151da177e4SLinus Torvalds } 36161da177e4SLinus Torvalds 3617b37ad28bSAl Viro __be32 3618ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3619a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 36201da177e4SLinus Torvalds { 3621b37ad28bSAl Viro __be32 status; 3622fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3623dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36241da177e4SLinus Torvalds 36251da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3626ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3627ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36281da177e4SLinus Torvalds 3629ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3630a8cddc5dSJ. Bruce Fields if (status) 3631a8cddc5dSJ. Bruce Fields return status; 36321da177e4SLinus Torvalds 36331da177e4SLinus Torvalds nfs4_lock_state(); 36341da177e4SLinus Torvalds 36359072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3636ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36372288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36389072d5c6SJ. Bruce Fields if (status) 36391da177e4SLinus Torvalds goto out; 3640fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 364168b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3642dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 364368b66e82SJ. Bruce Fields goto out; 3644dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3645dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3646dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36478c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3648dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3649c7b9a459SNeilBrown 36502a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 365168b66e82SJ. Bruce Fields status = nfs_ok; 36521da177e4SLinus Torvalds out: 36535ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36541da177e4SLinus Torvalds nfs4_unlock_state(); 36551da177e4SLinus Torvalds return status; 36561da177e4SLinus Torvalds } 36571da177e4SLinus Torvalds 36586409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36591da177e4SLinus Torvalds { 366082c5ff1bSJeff Layton if (!test_access(access, stp)) 36616409a5a6SJ. Bruce Fields return; 36626409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 366382c5ff1bSJeff Layton clear_access(access, stp); 3664f197c271SJ. Bruce Fields } 36656409a5a6SJ. Bruce Fields 36666409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36676409a5a6SJ. Bruce Fields { 36686409a5a6SJ. Bruce Fields switch (to_access) { 36696409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36706409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36716409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36726409a5a6SJ. Bruce Fields break; 36736409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36746409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36756409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36766409a5a6SJ. Bruce Fields break; 36776409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36786409a5a6SJ. Bruce Fields break; 36796409a5a6SJ. Bruce Fields default: 36806409a5a6SJ. Bruce Fields BUG(); 36811da177e4SLinus Torvalds } 36821da177e4SLinus Torvalds } 36831da177e4SLinus Torvalds 36841da177e4SLinus Torvalds static void 3685ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36861da177e4SLinus Torvalds { 36871da177e4SLinus Torvalds int i; 36881da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36891da177e4SLinus Torvalds if ((i & deny) != i) 3690ce0fc43cSJeff Layton clear_deny(i, stp); 36911da177e4SLinus Torvalds } 36921da177e4SLinus Torvalds } 36931da177e4SLinus Torvalds 3694b37ad28bSAl Viro __be32 3695ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3696ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3697a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36981da177e4SLinus Torvalds { 3699b37ad28bSAl Viro __be32 status; 3700dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3703ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3704ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37051da177e4SLinus Torvalds 3706c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 37072c8bd7e0SBenny Halevy if (od->od_deleg_want) 37082c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 37092c8bd7e0SBenny Halevy od->od_deleg_want); 37101da177e4SLinus Torvalds 37111da177e4SLinus Torvalds nfs4_lock_state(); 3712c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3713c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 37149072d5c6SJ. Bruce Fields if (status) 37151da177e4SLinus Torvalds goto out; 37161da177e4SLinus Torvalds status = nfserr_inval; 371782c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 37181da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 37191da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 37201da177e4SLinus Torvalds goto out; 37211da177e4SLinus Torvalds } 3722ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 37231da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 37241da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 37251da177e4SLinus Torvalds goto out; 37261da177e4SLinus Torvalds } 37276409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 37281da177e4SLinus Torvalds 3729ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37301da177e4SLinus Torvalds 3731dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3732dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37331da177e4SLinus Torvalds status = nfs_ok; 37341da177e4SLinus Torvalds out: 37355ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37361da177e4SLinus Torvalds nfs4_unlock_state(); 37371da177e4SLinus Torvalds return status; 37381da177e4SLinus Torvalds } 37391da177e4SLinus Torvalds 374038c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 374138c387b5SJ. Bruce Fields { 374238c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 374338c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 374438c387b5SJ. Bruce Fields 374538c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 374638c387b5SJ. Bruce Fields return; 374738c387b5SJ. Bruce Fields oo = openowner(so); 374838c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 374938c387b5SJ. Bruce Fields if (!s) 375038c387b5SJ. Bruce Fields return; 375138c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 375238c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 375338c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 375438c387b5SJ. Bruce Fields return; 375538c387b5SJ. Bruce Fields } 375638c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3757f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3758f7a4d872SJ. Bruce Fields } 3759f7a4d872SJ. Bruce Fields 3760f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3761f7a4d872SJ. Bruce Fields { 3762f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3763f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 376438c387b5SJ. Bruce Fields } 376538c387b5SJ. Bruce Fields 37661da177e4SLinus Torvalds /* 37671da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37681da177e4SLinus Torvalds */ 3769b37ad28bSAl Viro __be32 3770ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3771a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37721da177e4SLinus Torvalds { 3773b37ad28bSAl Viro __be32 status; 3774fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3775dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37761da177e4SLinus Torvalds 37771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3778ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3779ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37801da177e4SLinus Torvalds 37811da177e4SLinus Torvalds nfs4_lock_state(); 3782f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3783f7a4d872SJ. Bruce Fields &close->cl_stateid, 3784f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3785f7a4d872SJ. Bruce Fields &stp); 37869072d5c6SJ. Bruce Fields if (status) 37871da177e4SLinus Torvalds goto out; 3788fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37891da177e4SLinus Torvalds status = nfs_ok; 3790dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3791dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37921da177e4SLinus Torvalds 3793f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 379438c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 379504ef5954SJ. Bruce Fields 379604ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 379704ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 379804ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 379904ef5954SJ. Bruce Fields */ 3800fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3801fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 38021da177e4SLinus Torvalds out: 38035ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 38041da177e4SLinus Torvalds nfs4_unlock_state(); 38051da177e4SLinus Torvalds return status; 38061da177e4SLinus Torvalds } 38071da177e4SLinus Torvalds 3808b37ad28bSAl Viro __be32 3809ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3810ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 38111da177e4SLinus Torvalds { 3812203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3813203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 381438c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3815203a8c8eSJ. Bruce Fields struct inode *inode; 3816b37ad28bSAl Viro __be32 status; 38171da177e4SLinus Torvalds 3818ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3819203a8c8eSJ. Bruce Fields return status; 3820203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 38211da177e4SLinus Torvalds 38221da177e4SLinus Torvalds nfs4_lock_state(); 382338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 382438c2f4b1SJ. Bruce Fields if (status) 3825203a8c8eSJ. Bruce Fields goto out; 382638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3827d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3828203a8c8eSJ. Bruce Fields if (status) 3829203a8c8eSJ. Bruce Fields goto out; 3830203a8c8eSJ. Bruce Fields 3831203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38321da177e4SLinus Torvalds out: 3833203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3834203a8c8eSJ. Bruce Fields 38351da177e4SLinus Torvalds return status; 38361da177e4SLinus Torvalds } 38371da177e4SLinus Torvalds 38381da177e4SLinus Torvalds 38391da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38401da177e4SLinus Torvalds 3841009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3842009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3843009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38441da177e4SLinus Torvalds 384587df4de8SBenny Halevy static inline u64 384687df4de8SBenny Halevy end_offset(u64 start, u64 len) 384787df4de8SBenny Halevy { 384887df4de8SBenny Halevy u64 end; 384987df4de8SBenny Halevy 385087df4de8SBenny Halevy end = start + len; 385187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 385287df4de8SBenny Halevy } 385387df4de8SBenny Halevy 385487df4de8SBenny Halevy /* last octet in a range */ 385587df4de8SBenny Halevy static inline u64 385687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 385787df4de8SBenny Halevy { 385887df4de8SBenny Halevy u64 end; 385987df4de8SBenny Halevy 386087df4de8SBenny Halevy BUG_ON(!len); 386187df4de8SBenny Halevy end = start + len; 386287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 386387df4de8SBenny Halevy } 386487df4de8SBenny Halevy 3865009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38661da177e4SLinus Torvalds { 38671da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38681da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3869009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38701da177e4SLinus Torvalds } 38711da177e4SLinus Torvalds 3872009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38731da177e4SLinus Torvalds 38741da177e4SLinus Torvalds /* 38751da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38761da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38771da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38781da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38791da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38801da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38811da177e4SLinus Torvalds */ 38821da177e4SLinus Torvalds static inline void 38831da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38841da177e4SLinus Torvalds { 38851da177e4SLinus Torvalds if (lock->fl_start < 0) 38861da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38871da177e4SLinus Torvalds if (lock->fl_end < 0) 38881da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38891da177e4SLinus Torvalds } 38901da177e4SLinus Torvalds 3891d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3892d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38937b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3894d5b9026aSNeilBrown }; 38951da177e4SLinus Torvalds 38961da177e4SLinus Torvalds static inline void 38971da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38981da177e4SLinus Torvalds { 3899fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39001da177e4SLinus Torvalds 3901d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3902fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3903fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3904fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 39057c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 39067c13f344SJ. Bruce Fields /* We just don't care that much */ 39077c13f344SJ. Bruce Fields goto nevermind; 3908fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3909fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3910d5b9026aSNeilBrown } else { 39117c13f344SJ. Bruce Fields nevermind: 39127c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 39137c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3914d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3915d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 39161da177e4SLinus Torvalds } 39171da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 391887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 391987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 39201da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 39211da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 39221da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 39231da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 39241da177e4SLinus Torvalds } 39251da177e4SLinus Torvalds 3926b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3927b93d87c1SJ. Bruce Fields { 3928b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3929b93d87c1SJ. Bruce Fields 3930b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3931b93d87c1SJ. Bruce Fields return false; 3932b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3933b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3934b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3935b93d87c1SJ. Bruce Fields } 3936b93d87c1SJ. Bruce Fields 3937fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3938fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39391da177e4SLinus Torvalds struct xdr_netobj *owner) 39401da177e4SLinus Torvalds { 3941009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3942b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39431da177e4SLinus Torvalds 3944009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3945b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3946b93d87c1SJ. Bruce Fields return lo; 39471da177e4SLinus Torvalds } 39481da177e4SLinus Torvalds return NULL; 39491da177e4SLinus Torvalds } 39501da177e4SLinus Torvalds 3951dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3952ff194bd9SJ. Bruce Fields { 3953009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3954009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3955009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3956009673b4SJ. Bruce Fields 395716bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3958009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3959fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3960ff194bd9SJ. Bruce Fields } 3961ff194bd9SJ. Bruce Fields 39621da177e4SLinus Torvalds /* 39631da177e4SLinus Torvalds * Alloc a lock owner structure. 39641da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 396525985edcSLucas De Marchi * occurred. 39661da177e4SLinus Torvalds * 396716bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39681da177e4SLinus Torvalds */ 39691da177e4SLinus Torvalds 3970fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3971dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3972fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39731da177e4SLinus Torvalds 3974fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3975fe0750e5SJ. Bruce Fields if (!lo) 39761da177e4SLinus Torvalds return NULL; 3977fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3978fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3979b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3980b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3981fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3982fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3983fe0750e5SJ. Bruce Fields return lo; 39841da177e4SLinus Torvalds } 39851da177e4SLinus Torvalds 3986dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3987dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39881da177e4SLinus Torvalds { 3989dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3990d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39911da177e4SLinus Torvalds 3992996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39935ac049acSNeilBrown if (stp == NULL) 39946136d2b4SJ. Bruce Fields return NULL; 3995996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39968beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3997fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3998fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 399913cd2184SNeilBrown get_nfs4_file(fp); 40001da177e4SLinus Torvalds stp->st_file = fp; 40010997b173SJ. Bruce Fields stp->st_access_bmap = 0; 40021da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 40034c4cd222SNeilBrown stp->st_openstp = open_stp; 40041da177e4SLinus Torvalds return stp; 40051da177e4SLinus Torvalds } 40061da177e4SLinus Torvalds 4007fd39ca9aSNeilBrown static int 40081da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 40091da177e4SLinus Torvalds { 401087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 40111da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 40121da177e4SLinus Torvalds } 40131da177e4SLinus Torvalds 4014dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 40150997b173SJ. Bruce Fields { 40160997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 40170997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 40180997b173SJ. Bruce Fields 401982c5ff1bSJeff Layton if (test_access(access, lock_stp)) 40200997b173SJ. Bruce Fields return; 40210997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 402282c5ff1bSJeff Layton set_access(access, lock_stp); 40230997b173SJ. Bruce Fields } 40240997b173SJ. Bruce Fields 40252355c596SJ. 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) 402664a284d0SJ. Bruce Fields { 402764a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 402864a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 402964a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 403064a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 403164a284d0SJ. Bruce Fields unsigned int strhashval; 403264a284d0SJ. Bruce Fields 403364a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 403464a284d0SJ. Bruce Fields if (lo) { 403564a284d0SJ. Bruce Fields if (!cstate->minorversion) 403664a284d0SJ. Bruce Fields return nfserr_bad_seqid; 403764a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 403864a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 403964a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 404064a284d0SJ. Bruce Fields return nfs_ok; 404164a284d0SJ. Bruce Fields } 404216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 404364a284d0SJ. Bruce Fields &lock->v.new.owner); 404464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 404564a284d0SJ. Bruce Fields if (lo == NULL) 404664a284d0SJ. Bruce Fields return nfserr_jukebox; 404764a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 404864a284d0SJ. Bruce Fields if (*lst == NULL) { 404964a284d0SJ. Bruce Fields release_lockowner(lo); 405064a284d0SJ. Bruce Fields return nfserr_jukebox; 405164a284d0SJ. Bruce Fields } 405264a284d0SJ. Bruce Fields *new = true; 405364a284d0SJ. Bruce Fields return nfs_ok; 405464a284d0SJ. Bruce Fields } 405564a284d0SJ. Bruce Fields 40561da177e4SLinus Torvalds /* 40571da177e4SLinus Torvalds * LOCK operation 40581da177e4SLinus Torvalds */ 4059b37ad28bSAl Viro __be32 4060ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4061a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40621da177e4SLinus Torvalds { 4063fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4064fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4065dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40667d947842SJ. Bruce Fields struct file *filp = NULL; 40671da177e4SLinus Torvalds struct file_lock file_lock; 40688dc7c311SAndy Adamson struct file_lock conflock; 4069b37ad28bSAl Viro __be32 status = 0; 407064a284d0SJ. Bruce Fields bool new_state = false; 4071b34f27aaSJ. Bruce Fields int lkflg; 4072b8dd7b9aSAl Viro int err; 40731da177e4SLinus Torvalds 40741da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40751da177e4SLinus Torvalds (long long) lock->lk_offset, 40761da177e4SLinus Torvalds (long long) lock->lk_length); 40771da177e4SLinus Torvalds 40781da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40791da177e4SLinus Torvalds return nfserr_inval; 40801da177e4SLinus Torvalds 4081ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40828837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4083a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4084a6f6ef2fSAndy Adamson return status; 4085a6f6ef2fSAndy Adamson } 4086a6f6ef2fSAndy Adamson 40871da177e4SLinus Torvalds nfs4_lock_state(); 40881da177e4SLinus Torvalds 40891da177e4SLinus Torvalds if (lock->lk_is_new) { 40901da177e4SLinus Torvalds /* 40911da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4092893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4093893f8770SNeilBrown * lock stateid. 40941da177e4SLinus Torvalds */ 4095dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40961da177e4SLinus Torvalds 4097684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4098684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4099684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4100684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4101684e5638SJ. Bruce Fields sizeof(clientid_t)); 4102684e5638SJ. Bruce Fields 41031da177e4SLinus Torvalds status = nfserr_stale_clientid; 4104684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 41051da177e4SLinus Torvalds goto out; 41061da177e4SLinus Torvalds 41071da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4108c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 41091da177e4SLinus Torvalds lock->lk_new_open_seqid, 41101da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4111c0a5d93eSJ. Bruce Fields &open_stp); 411237515177SNeilBrown if (status) 41131da177e4SLinus Torvalds goto out; 4114fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4115b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4116684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4117b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4118b34f27aaSJ. Bruce Fields goto out; 411964a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 412064a284d0SJ. Bruce Fields &lock_stp, &new_state); 412164a284d0SJ. Bruce Fields if (status) 41221da177e4SLinus Torvalds goto out; 41231da177e4SLinus Torvalds } else { 41241da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4125dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 41261da177e4SLinus Torvalds lock->lk_old_lock_seqid, 41271da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 41282288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 41291da177e4SLinus Torvalds if (status) 41301da177e4SLinus Torvalds goto out; 413164a284d0SJ. Bruce Fields } 4132fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 41331da177e4SLinus Torvalds 4134b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4135b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4136b34f27aaSJ. Bruce Fields if (status) 4137b34f27aaSJ. Bruce Fields goto out; 4138b34f27aaSJ. Bruce Fields 41390dd395dcSNeilBrown status = nfserr_grace; 4140af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41410dd395dcSNeilBrown goto out; 41420dd395dcSNeilBrown status = nfserr_no_grace; 4143af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41440dd395dcSNeilBrown goto out; 41450dd395dcSNeilBrown 41461da177e4SLinus Torvalds locks_init_lock(&file_lock); 41471da177e4SLinus Torvalds switch (lock->lk_type) { 41481da177e4SLinus Torvalds case NFS4_READ_LT: 41491da177e4SLinus Torvalds case NFS4_READW_LT: 4150f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41510997b173SJ. Bruce Fields if (filp) 41520997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41531da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41541da177e4SLinus Torvalds break; 41551da177e4SLinus Torvalds case NFS4_WRITE_LT: 41561da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4157f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41580997b173SJ. Bruce Fields if (filp) 41590997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41601da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41611da177e4SLinus Torvalds break; 41621da177e4SLinus Torvalds default: 41631da177e4SLinus Torvalds status = nfserr_inval; 41641da177e4SLinus Torvalds goto out; 41651da177e4SLinus Torvalds } 4166f9d7562fSJ. Bruce Fields if (!filp) { 4167f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4168f9d7562fSJ. Bruce Fields goto out; 4169f9d7562fSJ. Bruce Fields } 4170b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41711da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41721da177e4SLinus Torvalds file_lock.fl_file = filp; 41731da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4174d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41751da177e4SLinus Torvalds 41761da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 417787df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41781da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41791da177e4SLinus Torvalds 41801da177e4SLinus Torvalds /* 41811da177e4SLinus Torvalds * Try to lock the file in the VFS. 41821da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41831da177e4SLinus Torvalds */ 41841da177e4SLinus Torvalds 4185529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4186b8dd7b9aSAl Viro switch (-err) { 41871da177e4SLinus Torvalds case 0: /* success! */ 4188dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4189dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41901da177e4SLinus Torvalds sizeof(stateid_t)); 4191b8dd7b9aSAl Viro status = 0; 4192eb76b3fdSAndy Adamson break; 4193eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4194eb76b3fdSAndy Adamson status = nfserr_denied; 4195eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4196eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4197eb76b3fdSAndy Adamson break; 41981da177e4SLinus Torvalds case (EDEADLK): 41991da177e4SLinus Torvalds status = nfserr_deadlock; 4200eb76b3fdSAndy Adamson break; 42011da177e4SLinus Torvalds default: 4202fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 42033e772463SJ. Bruce Fields status = nfserrno(err); 4204eb76b3fdSAndy Adamson break; 42051da177e4SLinus Torvalds } 42061da177e4SLinus Torvalds out: 420764a284d0SJ. Bruce Fields if (status && new_state) 4208f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 42095ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 42101da177e4SLinus Torvalds nfs4_unlock_state(); 42111da177e4SLinus Torvalds return status; 42121da177e4SLinus Torvalds } 42131da177e4SLinus Torvalds 42141da177e4SLinus Torvalds /* 421555ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 421655ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 421755ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 421855ef1274SJ. Bruce Fields * inode operation.) 421955ef1274SJ. Bruce Fields */ 422055ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 422155ef1274SJ. Bruce Fields { 422255ef1274SJ. Bruce Fields struct file *file; 422355ef1274SJ. Bruce Fields int err; 422455ef1274SJ. Bruce Fields 422555ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 422655ef1274SJ. Bruce Fields if (err) 422755ef1274SJ. Bruce Fields return err; 422855ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 422955ef1274SJ. Bruce Fields nfsd_close(file); 423055ef1274SJ. Bruce Fields return err; 423155ef1274SJ. Bruce Fields } 423255ef1274SJ. Bruce Fields 423355ef1274SJ. Bruce Fields /* 42341da177e4SLinus Torvalds * LOCKT operation 42351da177e4SLinus Torvalds */ 4236b37ad28bSAl Viro __be32 4237ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4238ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 42391da177e4SLinus Torvalds { 42401da177e4SLinus Torvalds struct inode *inode; 42411da177e4SLinus Torvalds struct file_lock file_lock; 4242fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4243fd85b817SMarc Eshel int error; 4244b37ad28bSAl Viro __be32 status; 42451da177e4SLinus Torvalds 4246af558e33SJ. Bruce Fields if (locks_in_grace()) 42471da177e4SLinus Torvalds return nfserr_grace; 42481da177e4SLinus Torvalds 42491da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42501da177e4SLinus Torvalds return nfserr_inval; 42511da177e4SLinus Torvalds 42521da177e4SLinus Torvalds nfs4_lock_state(); 42531da177e4SLinus Torvalds 42541da177e4SLinus Torvalds status = nfserr_stale_clientid; 425560adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42561da177e4SLinus Torvalds goto out; 42571da177e4SLinus Torvalds 425875c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42591da177e4SLinus Torvalds goto out; 42601da177e4SLinus Torvalds 4261ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42621da177e4SLinus Torvalds locks_init_lock(&file_lock); 42631da177e4SLinus Torvalds switch (lockt->lt_type) { 42641da177e4SLinus Torvalds case NFS4_READ_LT: 42651da177e4SLinus Torvalds case NFS4_READW_LT: 42661da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42671da177e4SLinus Torvalds break; 42681da177e4SLinus Torvalds case NFS4_WRITE_LT: 42691da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42701da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42711da177e4SLinus Torvalds break; 42721da177e4SLinus Torvalds default: 42732fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42741da177e4SLinus Torvalds status = nfserr_inval; 42751da177e4SLinus Torvalds goto out; 42761da177e4SLinus Torvalds } 42771da177e4SLinus Torvalds 4278fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4279fe0750e5SJ. Bruce Fields if (lo) 4280fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42811da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42821da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42831da177e4SLinus Torvalds 42841da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 428587df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42861da177e4SLinus Torvalds 42871da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42881da177e4SLinus Torvalds 42891da177e4SLinus Torvalds status = nfs_ok; 429055ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4291fd85b817SMarc Eshel if (error) { 4292fd85b817SMarc Eshel status = nfserrno(error); 4293fd85b817SMarc Eshel goto out; 4294fd85b817SMarc Eshel } 42959d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42961da177e4SLinus Torvalds status = nfserr_denied; 42979d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42981da177e4SLinus Torvalds } 42991da177e4SLinus Torvalds out: 43001da177e4SLinus Torvalds nfs4_unlock_state(); 43011da177e4SLinus Torvalds return status; 43021da177e4SLinus Torvalds } 43031da177e4SLinus Torvalds 4304b37ad28bSAl Viro __be32 4305ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4306a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 43071da177e4SLinus Torvalds { 4308dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43091da177e4SLinus Torvalds struct file *filp = NULL; 43101da177e4SLinus Torvalds struct file_lock file_lock; 4311b37ad28bSAl Viro __be32 status; 4312b8dd7b9aSAl Viro int err; 43131da177e4SLinus Torvalds 43141da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 43151da177e4SLinus Torvalds (long long) locku->lu_offset, 43161da177e4SLinus Torvalds (long long) locku->lu_length); 43171da177e4SLinus Torvalds 43181da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 43191da177e4SLinus Torvalds return nfserr_inval; 43201da177e4SLinus Torvalds 43211da177e4SLinus Torvalds nfs4_lock_state(); 43221da177e4SLinus Torvalds 43239072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 43242288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 43259072d5c6SJ. Bruce Fields if (status) 43261da177e4SLinus Torvalds goto out; 4327f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4328f9d7562fSJ. Bruce Fields if (!filp) { 4329f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4330f9d7562fSJ. Bruce Fields goto out; 4331f9d7562fSJ. Bruce Fields } 43321da177e4SLinus Torvalds BUG_ON(!filp); 43331da177e4SLinus Torvalds locks_init_lock(&file_lock); 43341da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4335fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 43361da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 43371da177e4SLinus Torvalds file_lock.fl_file = filp; 43381da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4339d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 43401da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 43411da177e4SLinus Torvalds 434287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 43431da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43441da177e4SLinus Torvalds 43451da177e4SLinus Torvalds /* 43461da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43471da177e4SLinus Torvalds */ 4348fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4349b8dd7b9aSAl Viro if (err) { 4350fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43511da177e4SLinus Torvalds goto out_nfserr; 43521da177e4SLinus Torvalds } 43531da177e4SLinus Torvalds /* 43541da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43551da177e4SLinus Torvalds */ 4356dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4357dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43581da177e4SLinus Torvalds 43591da177e4SLinus Torvalds out: 436071c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43611da177e4SLinus Torvalds nfs4_unlock_state(); 43621da177e4SLinus Torvalds return status; 43631da177e4SLinus Torvalds 43641da177e4SLinus Torvalds out_nfserr: 4365b8dd7b9aSAl Viro status = nfserrno(err); 43661da177e4SLinus Torvalds goto out; 43671da177e4SLinus Torvalds } 43681da177e4SLinus Torvalds 43691da177e4SLinus Torvalds /* 43701da177e4SLinus Torvalds * returns 43711da177e4SLinus Torvalds * 1: locks held by lockowner 43721da177e4SLinus Torvalds * 0: no locks held by lockowner 43731da177e4SLinus Torvalds */ 43741da177e4SLinus Torvalds static int 4375fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43761da177e4SLinus Torvalds { 43771da177e4SLinus Torvalds struct file_lock **flpp; 4378f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43791da177e4SLinus Torvalds int status = 0; 43801da177e4SLinus Torvalds 4381b89f4321SArnd Bergmann lock_flocks(); 43821da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4383796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43841da177e4SLinus Torvalds status = 1; 43851da177e4SLinus Torvalds goto out; 43861da177e4SLinus Torvalds } 4387796dadfdSJ. Bruce Fields } 43881da177e4SLinus Torvalds out: 4389b89f4321SArnd Bergmann unlock_flocks(); 43901da177e4SLinus Torvalds return status; 43911da177e4SLinus Torvalds } 43921da177e4SLinus Torvalds 4393b37ad28bSAl Viro __be32 4394b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4395b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4396b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43971da177e4SLinus Torvalds { 43981da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43993e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4400fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4401dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 44021da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 44033e9e3dbeSNeilBrown struct list_head matches; 440416bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4405b37ad28bSAl Viro __be32 status; 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 44081da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 44091da177e4SLinus Torvalds 44101da177e4SLinus Torvalds /* XXX check for lease expiration */ 44111da177e4SLinus Torvalds 44121da177e4SLinus Torvalds status = nfserr_stale_clientid; 4413849823c5SNeil Brown if (STALE_CLIENTID(clid)) 44141da177e4SLinus Torvalds return status; 44151da177e4SLinus Torvalds 44161da177e4SLinus Torvalds nfs4_lock_state(); 44171da177e4SLinus Torvalds 44181da177e4SLinus Torvalds status = nfserr_locks_held; 44193e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 442006f1f864SJ. Bruce Fields 442116bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 442216bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 442316bfdaafSJ. Bruce Fields continue; 4424599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 44253e9e3dbeSNeilBrown continue; 44263e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4427ea1da636SNeilBrown st_perstateowner) { 4428fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4429fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 44301da177e4SLinus Torvalds goto out; 4431fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 44321da177e4SLinus Torvalds } 44333e9e3dbeSNeilBrown } 44343e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 44353e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 44363e9e3dbeSNeilBrown * have been checked. */ 44371da177e4SLinus Torvalds status = nfs_ok; 44380fa822e4SNeilBrown while (!list_empty(&matches)) { 4439fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4440fe0750e5SJ. Bruce Fields lo_list); 44410fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 44420fa822e4SNeilBrown * for openowners. */ 4443fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4444fe0750e5SJ. Bruce Fields release_lockowner(lo); 44451da177e4SLinus Torvalds } 44461da177e4SLinus Torvalds out: 44471da177e4SLinus Torvalds nfs4_unlock_state(); 44481da177e4SLinus Torvalds return status; 44491da177e4SLinus Torvalds } 44501da177e4SLinus Torvalds 44511da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4452a55370a3SNeilBrown alloc_reclaim(void) 44531da177e4SLinus Torvalds { 4454a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44551da177e4SLinus Torvalds } 44561da177e4SLinus Torvalds 4457c7b9a459SNeilBrown int 4458a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4459c7b9a459SNeilBrown { 4460c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4461c7b9a459SNeilBrown struct nfs4_client *clp; 4462c7b9a459SNeilBrown 4463e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4464393d8ed8SJ. Bruce Fields if (!clp) 4465393d8ed8SJ. Bruce Fields return 0; 4466a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4467c7b9a459SNeilBrown } 4468c7b9a459SNeilBrown 44691da177e4SLinus Torvalds /* 44701da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44711da177e4SLinus Torvalds */ 4472190e4fbfSNeilBrown int 4473190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44741da177e4SLinus Torvalds { 44751da177e4SLinus Torvalds unsigned int strhashval; 44761da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44771da177e4SLinus Torvalds 4478a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4479a55370a3SNeilBrown crp = alloc_reclaim(); 44801da177e4SLinus Torvalds if (!crp) 44811da177e4SLinus Torvalds return 0; 4482a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44831da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44841da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4485a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44861da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44871da177e4SLinus Torvalds return 1; 44881da177e4SLinus Torvalds } 44891da177e4SLinus Torvalds 44902a4317c5SJeff Layton void 44911da177e4SLinus Torvalds nfs4_release_reclaim(void) 44921da177e4SLinus Torvalds { 44931da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44941da177e4SLinus Torvalds int i; 44951da177e4SLinus Torvalds 44961da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44971da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44981da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44991da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 45001da177e4SLinus Torvalds list_del(&crp->cr_strhash); 45011da177e4SLinus Torvalds kfree(crp); 45021da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 45031da177e4SLinus Torvalds } 45041da177e4SLinus Torvalds } 45051da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 45061da177e4SLinus Torvalds } 45071da177e4SLinus Torvalds 45081da177e4SLinus Torvalds /* 45091da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 45102a4317c5SJeff Layton struct nfs4_client_reclaim * 4511a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 45121da177e4SLinus Torvalds { 45131da177e4SLinus Torvalds unsigned int strhashval; 45141da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 45151da177e4SLinus Torvalds 4516a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4517a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4518a55370a3SNeilBrown clp->cl_recdir); 45191da177e4SLinus Torvalds 45201da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4521a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 45221da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4523a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 45241da177e4SLinus Torvalds return crp; 45251da177e4SLinus Torvalds } 45261da177e4SLinus Torvalds } 45271da177e4SLinus Torvalds return NULL; 45281da177e4SLinus Torvalds } 45291da177e4SLinus Torvalds 45301da177e4SLinus Torvalds /* 45311da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 45321da177e4SLinus Torvalds */ 4533b37ad28bSAl Viro __be32 45341da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 45351da177e4SLinus Torvalds { 4536a52d726bSJeff Layton struct nfs4_client *clp; 4537a52d726bSJeff Layton 4538a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4539a52d726bSJeff Layton clp = find_confirmed_client(clid); 4540a52d726bSJeff Layton if (clp == NULL) 4541a52d726bSJeff Layton return nfserr_reclaim_bad; 4542a52d726bSJeff Layton 4543a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45441da177e4SLinus Torvalds } 45451da177e4SLinus Torvalds 454665178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 454765178db4SBryan Schumaker 454865178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 454965178db4SBryan Schumaker { 455065178db4SBryan Schumaker struct nfs4_client *clp, *next; 455165178db4SBryan Schumaker int count = 0; 455265178db4SBryan Schumaker 455365178db4SBryan Schumaker nfs4_lock_state(); 455465178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45552a4317c5SJeff Layton nfsd4_client_record_remove(clp); 455665178db4SBryan Schumaker expire_client(clp); 455765178db4SBryan Schumaker if (++count == num) 455865178db4SBryan Schumaker break; 455965178db4SBryan Schumaker } 456065178db4SBryan Schumaker nfs4_unlock_state(); 456165178db4SBryan Schumaker 456265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 456365178db4SBryan Schumaker } 456465178db4SBryan Schumaker 456565178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 456665178db4SBryan Schumaker { 456765178db4SBryan Schumaker release_lockowner(lockowner(sop)); 456865178db4SBryan Schumaker } 456965178db4SBryan Schumaker 457065178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 457165178db4SBryan Schumaker { 457265178db4SBryan Schumaker release_openowner(openowner(sop)); 457365178db4SBryan Schumaker } 457465178db4SBryan Schumaker 4575353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 457665178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 457765178db4SBryan Schumaker { 457865178db4SBryan Schumaker int i, count = 0; 457965178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 458065178db4SBryan Schumaker 458116bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 458216bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 458316bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 458416bfdaafSJ. Bruce Fields continue; 458565178db4SBryan Schumaker release_sop(sop); 458665178db4SBryan Schumaker if (++count == num) 458765178db4SBryan Schumaker return count; 458865178db4SBryan Schumaker } 458965178db4SBryan Schumaker } 459065178db4SBryan Schumaker return count; 459165178db4SBryan Schumaker } 459265178db4SBryan Schumaker 459365178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 459465178db4SBryan Schumaker { 459565178db4SBryan Schumaker int count; 459665178db4SBryan Schumaker 459765178db4SBryan Schumaker nfs4_lock_state(); 459816bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 459965178db4SBryan Schumaker nfs4_unlock_state(); 460065178db4SBryan Schumaker 460165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 460265178db4SBryan Schumaker } 460365178db4SBryan Schumaker 460465178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 460565178db4SBryan Schumaker { 460665178db4SBryan Schumaker int count; 460765178db4SBryan Schumaker 460865178db4SBryan Schumaker nfs4_lock_state(); 460916bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 461065178db4SBryan Schumaker nfs4_unlock_state(); 461165178db4SBryan Schumaker 461265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 461365178db4SBryan Schumaker } 461465178db4SBryan Schumaker 461565178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 461665178db4SBryan Schumaker { 461765178db4SBryan Schumaker int i, count = 0; 46182d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 46192d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 462065178db4SBryan Schumaker 462165178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 46222d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 46232d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 462465178db4SBryan Schumaker deleg_func(dp); 462565178db4SBryan Schumaker if (++count == num) 462665178db4SBryan Schumaker return count; 462765178db4SBryan Schumaker } 462865178db4SBryan Schumaker } 462965178db4SBryan Schumaker } 46302d3475c0SBryan Schumaker 463165178db4SBryan Schumaker return count; 463265178db4SBryan Schumaker } 463365178db4SBryan Schumaker 463465178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 463565178db4SBryan Schumaker { 463665178db4SBryan Schumaker unsigned int count; 463765178db4SBryan Schumaker 463865178db4SBryan Schumaker nfs4_lock_state(); 463965178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 464065178db4SBryan Schumaker nfs4_unlock_state(); 464165178db4SBryan Schumaker 464265178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 464365178db4SBryan Schumaker } 464465178db4SBryan Schumaker 464565178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 464665178db4SBryan Schumaker { 464765178db4SBryan Schumaker unsigned int count; 464865178db4SBryan Schumaker 464965178db4SBryan Schumaker nfs4_lock_state(); 465065178db4SBryan Schumaker spin_lock(&recall_lock); 465165178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 465265178db4SBryan Schumaker spin_unlock(&recall_lock); 465365178db4SBryan Schumaker nfs4_unlock_state(); 465465178db4SBryan Schumaker 465565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 465665178db4SBryan Schumaker } 465765178db4SBryan Schumaker 465865178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 465965178db4SBryan Schumaker 4660ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46611da177e4SLinus Torvalds 466272083396SBryan Schumaker void 4663ac4d8ff2SNeilBrown nfs4_state_init(void) 46641da177e4SLinus Torvalds { 466572083396SBryan Schumaker int i; 46661da177e4SLinus Torvalds 46671da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46681da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46691da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46701da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46711da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 467202cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46731da177e4SLinus Torvalds } 46745282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46755282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46761da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46771da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46781da177e4SLinus Torvalds } 467916bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 468016bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46811da177e4SLinus Torvalds } 4682009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4683009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46841da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46851da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46861da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4687ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4688ac4d8ff2SNeilBrown } 4689ac4d8ff2SNeilBrown 4690c2f1a551SMeelap Shah /* 4691c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4692c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4693c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4694c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4695c2f1a551SMeelap Shah * 4696c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4697c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4698c2f1a551SMeelap Shah */ 4699c2f1a551SMeelap Shah static void 4700c2f1a551SMeelap Shah set_max_delegations(void) 4701c2f1a551SMeelap Shah { 4702c2f1a551SMeelap Shah /* 4703c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4704c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4705c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4706c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4707c2f1a551SMeelap Shah */ 4708c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4709c2f1a551SMeelap Shah } 4710c2f1a551SMeelap Shah 4711ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4712ac4d8ff2SNeilBrown 4713a6d6b781SJeff Layton int 4714a6d6b781SJeff Layton nfs4_state_start(void) 4715ac4d8ff2SNeilBrown { 4716b5a1a81eSJ. Bruce Fields int ret; 4717b5a1a81eSJ. Bruce Fields 47182a4317c5SJeff Layton /* 47192a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 47202a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 47212a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 47222a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 47232a4317c5SJeff Layton * basis. 47242a4317c5SJeff Layton */ 47252a4317c5SJeff Layton get_net(&init_net); 47262a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 47271da177e4SLinus Torvalds boot_time = get_seconds(); 4728af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 472933dcc481SJeff Layton grace_ended = false; 47309a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4731e46b498cSJ. Bruce Fields nfsd4_grace); 4732b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4733a6d6b781SJeff Layton if (ret) { 4734a6d6b781SJeff Layton ret = -ENOMEM; 4735a6d6b781SJeff Layton goto out_recovery; 4736a6d6b781SJeff Layton } 473758da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4738a6d6b781SJeff Layton if (laundry_wq == NULL) { 4739a6d6b781SJeff Layton ret = -ENOMEM; 4740a6d6b781SJeff Layton goto out_recovery; 4741a6d6b781SJeff Layton } 4742b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4743b5a1a81eSJ. Bruce Fields if (ret) 4744b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4745e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4746c2f1a551SMeelap Shah set_max_delegations(); 4747b5a1a81eSJ. Bruce Fields return 0; 4748b5a1a81eSJ. Bruce Fields out_free_laundry: 4749b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4750a6d6b781SJeff Layton out_recovery: 47512a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47522a4317c5SJeff Layton put_net(&init_net); 4753b5a1a81eSJ. Bruce Fields return ret; 47541da177e4SLinus Torvalds } 47551da177e4SLinus Torvalds 47561da177e4SLinus Torvalds static void 47571da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47581da177e4SLinus Torvalds { 47591da177e4SLinus Torvalds int i; 47601da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47611da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47621da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47631da177e4SLinus Torvalds 47641da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47651da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47661da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47671da177e4SLinus Torvalds expire_client(clp); 47681da177e4SLinus Torvalds } 47691da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47701da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47711da177e4SLinus Torvalds expire_client(clp); 47721da177e4SLinus Torvalds } 47731da177e4SLinus Torvalds } 47741da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47751da177e4SLinus Torvalds spin_lock(&recall_lock); 47761da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47771da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47781da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47791da177e4SLinus Torvalds } 47801da177e4SLinus Torvalds spin_unlock(&recall_lock); 47811da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47821da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47831da177e4SLinus Torvalds unhash_delegation(dp); 47841da177e4SLinus Torvalds } 47851da177e4SLinus Torvalds 47862a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47872a4317c5SJeff Layton put_net(&init_net); 47881da177e4SLinus Torvalds } 47891da177e4SLinus Torvalds 47901da177e4SLinus Torvalds void 47911da177e4SLinus Torvalds nfs4_state_shutdown(void) 47921da177e4SLinus Torvalds { 4793afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47945e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47952c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 47961da177e4SLinus Torvalds nfs4_lock_state(); 47971da177e4SLinus Torvalds __nfs4_state_shutdown(); 47981da177e4SLinus Torvalds nfs4_unlock_state(); 4799c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 48001da177e4SLinus Torvalds } 48018b70484cSTigran Mkrtchyan 48028b70484cSTigran Mkrtchyan static void 48038b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48048b70484cSTigran Mkrtchyan { 480537c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 480637c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 48078b70484cSTigran Mkrtchyan } 48088b70484cSTigran Mkrtchyan 48098b70484cSTigran Mkrtchyan static void 48108b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 48118b70484cSTigran Mkrtchyan { 481237c593c5STigran Mkrtchyan if (cstate->minorversion) { 481337c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 481437c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 481537c593c5STigran Mkrtchyan } 481637c593c5STigran Mkrtchyan } 481737c593c5STigran Mkrtchyan 481837c593c5STigran Mkrtchyan void 481937c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 482037c593c5STigran Mkrtchyan { 482137c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 48228b70484cSTigran Mkrtchyan } 48238b70484cSTigran Mkrtchyan 482462cd4a59STigran Mkrtchyan /* 482562cd4a59STigran Mkrtchyan * functions to set current state id 482662cd4a59STigran Mkrtchyan */ 48278b70484cSTigran Mkrtchyan void 48289428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48299428fe1aSTigran Mkrtchyan { 48309428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 48319428fe1aSTigran Mkrtchyan } 48329428fe1aSTigran Mkrtchyan 48339428fe1aSTigran Mkrtchyan void 48348b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 48358b70484cSTigran Mkrtchyan { 48368b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 48378b70484cSTigran Mkrtchyan } 48388b70484cSTigran Mkrtchyan 48398b70484cSTigran Mkrtchyan void 484062cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 484162cd4a59STigran Mkrtchyan { 484262cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 484362cd4a59STigran Mkrtchyan } 484462cd4a59STigran Mkrtchyan 484562cd4a59STigran Mkrtchyan void 484662cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 484762cd4a59STigran Mkrtchyan { 484862cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 484962cd4a59STigran Mkrtchyan } 485062cd4a59STigran Mkrtchyan 485162cd4a59STigran Mkrtchyan /* 485262cd4a59STigran Mkrtchyan * functions to consume current state id 485362cd4a59STigran Mkrtchyan */ 48541e97b519STigran Mkrtchyan 48551e97b519STigran Mkrtchyan void 48569428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48579428fe1aSTigran Mkrtchyan { 48589428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48599428fe1aSTigran Mkrtchyan } 48609428fe1aSTigran Mkrtchyan 48619428fe1aSTigran Mkrtchyan void 48629428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48639428fe1aSTigran Mkrtchyan { 48649428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48659428fe1aSTigran Mkrtchyan } 48669428fe1aSTigran Mkrtchyan 48679428fe1aSTigran Mkrtchyan void 48681e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48691e97b519STigran Mkrtchyan { 48701e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48711e97b519STigran Mkrtchyan } 48721e97b519STigran Mkrtchyan 48731e97b519STigran Mkrtchyan void 48741e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48751e97b519STigran Mkrtchyan { 48761e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48771e97b519STigran Mkrtchyan } 48781e97b519STigran Mkrtchyan 487962cd4a59STigran Mkrtchyan void 48808b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48818b70484cSTigran Mkrtchyan { 48828b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48838b70484cSTigran Mkrtchyan } 48848b70484cSTigran Mkrtchyan 48858b70484cSTigran Mkrtchyan void 488662cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48878b70484cSTigran Mkrtchyan { 488862cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48898b70484cSTigran Mkrtchyan } 489030813e27STigran Mkrtchyan 489130813e27STigran Mkrtchyan void 489230813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 489330813e27STigran Mkrtchyan { 489430813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 489530813e27STigran Mkrtchyan } 489630813e27STigran Mkrtchyan 489730813e27STigran Mkrtchyan void 489830813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 489930813e27STigran Mkrtchyan { 490030813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 490130813e27STigran Mkrtchyan } 4902