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> 417df302f7SChuck Lever #include <linux/ratelimit.h> 4268e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 43363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 449a74af21SBoaz Harrosh #include "xdr4.h" 450a3adadeSJ. Bruce Fields #include "vfs.h" 46bfa4b365SJ. Bruce Fields #include "current_stateid.h" 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 491da177e4SLinus Torvalds 501da177e4SLinus Torvalds /* Globals */ 51cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 52efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 53fd39ca9aSNeilBrown static time_t boot_time; 54f32f3c2dSJ. Bruce Fields 55f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 56f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 57f32f3c2dSJ. Bruce Fields .si_generation = ~0, 58f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 59f32f3c2dSJ. Bruce Fields }; 60f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 61f32f3c2dSJ. Bruce Fields /* all fields zero */ 62f32f3c2dSJ. Bruce Fields }; 6319ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6419ff0f28STigran Mkrtchyan .si_generation = 1, 6519ff0f28STigran Mkrtchyan }; 66f32f3c2dSJ. Bruce Fields 67ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 68fd39ca9aSNeilBrown 69f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 70f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 7119ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds /* forward declarations */ 74fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 751da177e4SLinus Torvalds 768b671b80SJ. Bruce Fields /* Locking: */ 778b671b80SJ. Bruce Fields 788b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 79353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 801da177e4SLinus Torvalds 818b671b80SJ. Bruce Fields /* 828b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 838b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 848b671b80SJ. Bruce Fields * eventually cover more: 858b671b80SJ. Bruce Fields */ 868b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 878b671b80SJ. Bruce Fields 88fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 89fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 93e60d4398SNeilBrown 941da177e4SLinus Torvalds void 951da177e4SLinus Torvalds nfs4_lock_state(void) 961da177e4SLinus Torvalds { 97353ab6e9SIngo Molnar mutex_lock(&client_mutex); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 100508dc6e1SBenny Halevy static void free_session(struct kref *); 101508dc6e1SBenny Halevy 102508dc6e1SBenny Halevy /* Must be called under the client_lock */ 103508dc6e1SBenny Halevy static void nfsd4_put_session_locked(struct nfsd4_session *ses) 104508dc6e1SBenny Halevy { 105508dc6e1SBenny Halevy kref_put(&ses->se_ref, free_session); 106508dc6e1SBenny Halevy } 107508dc6e1SBenny Halevy 108508dc6e1SBenny Halevy static void nfsd4_get_session(struct nfsd4_session *ses) 109508dc6e1SBenny Halevy { 110508dc6e1SBenny Halevy kref_get(&ses->se_ref); 111508dc6e1SBenny Halevy } 112508dc6e1SBenny Halevy 1131da177e4SLinus Torvalds void 1141da177e4SLinus Torvalds nfs4_unlock_state(void) 1151da177e4SLinus Torvalds { 116353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds static inline u32 1201da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1211da177e4SLinus Torvalds { 1221da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds u32 x = 0; 1251da177e4SLinus Torvalds while (nbytes--) { 1261da177e4SLinus Torvalds x *= 37; 1271da177e4SLinus Torvalds x += *cptr++; 1281da177e4SLinus Torvalds } 1291da177e4SLinus Torvalds return x; 1301da177e4SLinus Torvalds } 1311da177e4SLinus Torvalds 1321da177e4SLinus Torvalds static struct list_head del_recall_lru; 1331da177e4SLinus Torvalds 13432513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 13532513b40SJ. Bruce Fields { 13632513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 13732513b40SJ. Bruce Fields } 13832513b40SJ. Bruce Fields 13913cd2184SNeilBrown static inline void 14013cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14113cd2184SNeilBrown { 1428b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1438b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1448b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1458b671b80SJ. Bruce Fields iput(fi->fi_inode); 14632513b40SJ. Bruce Fields nfsd4_free_file(fi); 1478b671b80SJ. Bruce Fields } 14813cd2184SNeilBrown } 14913cd2184SNeilBrown 15013cd2184SNeilBrown static inline void 15113cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 15213cd2184SNeilBrown { 1538b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 15413cd2184SNeilBrown } 15513cd2184SNeilBrown 156ef0f3390SNeilBrown static int num_delegations; 157c2f1a551SMeelap Shah unsigned int max_delegations; 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown /* 160ef0f3390SNeilBrown * Open owner state (share locks) 161ef0f3390SNeilBrown */ 162ef0f3390SNeilBrown 16316bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 16416bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 16516bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 16616bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 167ef0f3390SNeilBrown 16816bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 169ddc04c41SJ. Bruce Fields { 170ddc04c41SJ. Bruce Fields unsigned int ret; 171ddc04c41SJ. Bruce Fields 172ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 173ddc04c41SJ. Bruce Fields ret += clientid; 17416bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 175ddc04c41SJ. Bruce Fields } 176ef0f3390SNeilBrown 17716bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 178ef0f3390SNeilBrown 179ef0f3390SNeilBrown /* hash table for nfs4_file */ 180ef0f3390SNeilBrown #define FILE_HASH_BITS 8 181ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 18235079582SShan Wei 183ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 184ddc04c41SJ. Bruce Fields { 185ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 186ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 187ddc04c41SJ. Bruce Fields } 188ddc04c41SJ. Bruce Fields 189ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 190ef0f3390SNeilBrown 191998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 192f9d7562fSJ. Bruce Fields { 193f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 194f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 195f9d7562fSJ. Bruce Fields } 196f9d7562fSJ. Bruce Fields 197998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 198998db52cSJ. Bruce Fields { 199998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 200998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 201998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 202998db52cSJ. Bruce Fields } else 203998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 204998db52cSJ. Bruce Fields } 205998db52cSJ. Bruce Fields 206998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 207f9d7562fSJ. Bruce Fields { 208f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 209f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 210f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields } 213f9d7562fSJ. Bruce Fields 214998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 215f9d7562fSJ. Bruce Fields { 216f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 217f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2183d02fa29SJ. Bruce Fields /* 2193d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2203d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2213d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2223d02fa29SJ. Bruce Fields */ 2233d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2243d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2253d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 226f9d7562fSJ. Bruce Fields } 227f9d7562fSJ. Bruce Fields } 228f9d7562fSJ. Bruce Fields 229998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 230998db52cSJ. Bruce Fields { 231998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 232998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 233998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 234998db52cSJ. Bruce Fields } else 235998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 236998db52cSJ. Bruce Fields } 237998db52cSJ. Bruce Fields 2386136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 23936d44c60SJ. Bruce Fields { 2406136d2b4SJ. Bruce Fields static int min_stateid = 0; 24138c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2426136d2b4SJ. Bruce Fields int new_stid; 2436136d2b4SJ. Bruce Fields int error; 24436d44c60SJ. Bruce Fields 24538c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2466136d2b4SJ. Bruce Fields /* 247996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 248996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 249996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 250996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2516136d2b4SJ. Bruce Fields */ 2526136d2b4SJ. Bruce Fields BUG_ON(error); 2536136d2b4SJ. Bruce Fields /* 2546136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2556136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2566136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2576136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2586136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2596136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2606136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2616136d2b4SJ. Bruce Fields */ 2626136d2b4SJ. Bruce Fields 2636136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2646136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2656136d2b4SJ. Bruce Fields min_stateid = 0; 2666136d2b4SJ. Bruce Fields return new_stid; 26736d44c60SJ. Bruce Fields } 26836d44c60SJ. Bruce Fields 269996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2702a74aba7SJ. Bruce Fields { 2712a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2726136d2b4SJ. Bruce Fields int new_id; 2732a74aba7SJ. Bruce Fields 2742a74aba7SJ. Bruce Fields stid->sc_type = type; 2752a74aba7SJ. Bruce Fields stid->sc_client = cl; 2762a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2776136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2786136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2792a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2802a74aba7SJ. Bruce Fields s->si_generation = 0; 281996e0938SJ. Bruce Fields } 282996e0938SJ. Bruce Fields 283996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 284996e0938SJ. Bruce Fields { 285996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 286996e0938SJ. Bruce Fields 287996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 288996e0938SJ. Bruce Fields return NULL; 289996e0938SJ. Bruce Fields /* 290996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 291996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 292996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 293996e0938SJ. Bruce Fields * preallocated entries. 294996e0938SJ. Bruce Fields */ 295996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2962a74aba7SJ. Bruce Fields } 2972a74aba7SJ. Bruce Fields 2984cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2994cdc951bSJ. Bruce Fields { 3004cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 3014cdc951bSJ. Bruce Fields } 3024cdc951bSJ. Bruce Fields 3031da177e4SLinus Torvalds static struct nfs4_delegation * 304dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 3051da177e4SLinus Torvalds { 3061da177e4SLinus Torvalds struct nfs4_delegation *dp; 3071da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 3081da177e4SLinus Torvalds 3091da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 310c3e48080SJ. Bruce Fields /* 311c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 312c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 313c3e48080SJ. Bruce Fields * write delegations properly. 314c3e48080SJ. Bruce Fields */ 315c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 316c3e48080SJ. Bruce Fields return NULL; 31747f9940cSMeelap Shah if (fp->fi_had_conflict) 31847f9940cSMeelap Shah return NULL; 319c2f1a551SMeelap Shah if (num_delegations > max_delegations) 320ef0f3390SNeilBrown return NULL; 321996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3225b2d21c1SNeilBrown if (dp == NULL) 3231da177e4SLinus Torvalds return dp; 324996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3252a74aba7SJ. Bruce Fields /* 3262a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3276136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3286136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3292a74aba7SJ. Bruce Fields */ 3302a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 331ef0f3390SNeilBrown num_delegations++; 332ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 333ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3341da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 33513cd2184SNeilBrown get_nfs4_file(fp); 3361da177e4SLinus Torvalds dp->dl_file = fp; 3371da177e4SLinus Torvalds dp->dl_type = type; 3386c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3391da177e4SLinus Torvalds dp->dl_time = 0; 3401da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 341b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3421da177e4SLinus Torvalds return dp; 3431da177e4SLinus Torvalds } 3441da177e4SLinus Torvalds 3451da177e4SLinus Torvalds void 3461da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3491da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 35013cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3515b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 352ef0f3390SNeilBrown num_delegations--; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 356acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3571da177e4SLinus Torvalds { 358acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 359acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 360acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3614ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 362acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 363acfdf5c3SJ. Bruce Fields } 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds 3666136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3676136d2b4SJ. Bruce Fields { 36838c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 36938c2f4b1SJ. Bruce Fields 37038c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3716136d2b4SJ. Bruce Fields } 3726136d2b4SJ. Bruce Fields 3731da177e4SLinus Torvalds /* Called under the state lock. */ 3741da177e4SLinus Torvalds static void 3751da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3761da177e4SLinus Torvalds { 3776136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 378ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3791da177e4SLinus Torvalds spin_lock(&recall_lock); 3805d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3811da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3821da177e4SLinus Torvalds spin_unlock(&recall_lock); 383acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3841da177e4SLinus Torvalds nfs4_put_delegation(dp); 3851da177e4SLinus Torvalds } 3861da177e4SLinus Torvalds 3871da177e4SLinus Torvalds /* 3881da177e4SLinus Torvalds * SETCLIENTID state 3891da177e4SLinus Torvalds */ 3901da177e4SLinus Torvalds 39136acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3929089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3939089f1b4SBenny Halevy 3941da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3951da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3961da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3971da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3981da177e4SLinus Torvalds 399ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 400ddc04c41SJ. Bruce Fields { 401ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 402ddc04c41SJ. Bruce Fields } 403ddc04c41SJ. Bruce Fields 404ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 405ddc04c41SJ. Bruce Fields { 406ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 407ddc04c41SJ. Bruce Fields } 408ddc04c41SJ. Bruce Fields 4091da177e4SLinus Torvalds /* 4101da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 4111da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 4121da177e4SLinus Torvalds * 4131da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 4141da177e4SLinus Torvalds * setclientid_confirmed info. 4151da177e4SLinus Torvalds * 4161da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4171da177e4SLinus Torvalds * setclientid info. 4181da177e4SLinus Torvalds * 4191da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4201da177e4SLinus Torvalds * for lease renewal. 4211da177e4SLinus Torvalds * 4221da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4231da177e4SLinus Torvalds * for last close replay. 4241da177e4SLinus Torvalds */ 4251da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4261da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4271da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4281da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4291da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4301da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4311da177e4SLinus Torvalds static struct list_head client_lru; 4321da177e4SLinus Torvalds static struct list_head close_lru; 4331da177e4SLinus Torvalds 434f9d7562fSJ. Bruce Fields /* 435f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 436f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 437f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 438f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 439f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 440f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 441f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 442f9d7562fSJ. Bruce Fields * 443f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 444f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 445f9d7562fSJ. Bruce Fields * 446f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 447f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 448f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 449f9d7562fSJ. Bruce Fields * 450f9d7562fSJ. Bruce Fields * which we should reject. 451f9d7562fSJ. Bruce Fields */ 4525ae037e5SJeff Layton static unsigned int 4535ae037e5SJeff Layton bmap_to_share_mode(unsigned long bmap) { 454f9d7562fSJ. Bruce Fields int i; 4555ae037e5SJeff Layton unsigned int access = 0; 456f9d7562fSJ. Bruce Fields 457f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 458f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 4595ae037e5SJeff Layton access |= i; 460f9d7562fSJ. Bruce Fields } 4615ae037e5SJeff Layton return access; 462f9d7562fSJ. Bruce Fields } 463f9d7562fSJ. Bruce Fields 4643a328614SJeff Layton static bool 465dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 466f9d7562fSJ. Bruce Fields unsigned int access, deny; 467f9d7562fSJ. Bruce Fields 4685ae037e5SJeff Layton access = bmap_to_share_mode(stp->st_access_bmap); 4695ae037e5SJeff Layton deny = bmap_to_share_mode(stp->st_deny_bmap); 470f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 4713a328614SJeff Layton return false; 4723a328614SJeff Layton return true; 473f9d7562fSJ. Bruce Fields } 474f9d7562fSJ. Bruce Fields 47582c5ff1bSJeff Layton /* set share access for a given stateid */ 47682c5ff1bSJeff Layton static inline void 47782c5ff1bSJeff Layton set_access(u32 access, struct nfs4_ol_stateid *stp) 47882c5ff1bSJeff Layton { 47982c5ff1bSJeff Layton __set_bit(access, &stp->st_access_bmap); 48082c5ff1bSJeff Layton } 48182c5ff1bSJeff Layton 48282c5ff1bSJeff Layton /* clear share access for a given stateid */ 48382c5ff1bSJeff Layton static inline void 48482c5ff1bSJeff Layton clear_access(u32 access, struct nfs4_ol_stateid *stp) 48582c5ff1bSJeff Layton { 48682c5ff1bSJeff Layton __clear_bit(access, &stp->st_access_bmap); 48782c5ff1bSJeff Layton } 48882c5ff1bSJeff Layton 48982c5ff1bSJeff Layton /* test whether a given stateid has access */ 49082c5ff1bSJeff Layton static inline bool 49182c5ff1bSJeff Layton test_access(u32 access, struct nfs4_ol_stateid *stp) 49282c5ff1bSJeff Layton { 49382c5ff1bSJeff Layton return test_bit(access, &stp->st_access_bmap); 49482c5ff1bSJeff Layton } 49582c5ff1bSJeff Layton 496ce0fc43cSJeff Layton /* set share deny for a given stateid */ 497ce0fc43cSJeff Layton static inline void 498ce0fc43cSJeff Layton set_deny(u32 access, struct nfs4_ol_stateid *stp) 499ce0fc43cSJeff Layton { 500ce0fc43cSJeff Layton __set_bit(access, &stp->st_deny_bmap); 501ce0fc43cSJeff Layton } 502ce0fc43cSJeff Layton 503ce0fc43cSJeff Layton /* clear share deny for a given stateid */ 504ce0fc43cSJeff Layton static inline void 505ce0fc43cSJeff Layton clear_deny(u32 access, struct nfs4_ol_stateid *stp) 506ce0fc43cSJeff Layton { 507ce0fc43cSJeff Layton __clear_bit(access, &stp->st_deny_bmap); 508ce0fc43cSJeff Layton } 509ce0fc43cSJeff Layton 510ce0fc43cSJeff Layton /* test whether a given stateid is denying specific access */ 511ce0fc43cSJeff Layton static inline bool 512ce0fc43cSJeff Layton test_deny(u32 access, struct nfs4_ol_stateid *stp) 513ce0fc43cSJeff Layton { 514ce0fc43cSJeff Layton return test_bit(access, &stp->st_deny_bmap); 515f9d7562fSJ. Bruce Fields } 516f9d7562fSJ. Bruce Fields 517f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 518f9d7562fSJ. Bruce Fields { 5198f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 520f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 521f9d7562fSJ. Bruce Fields return O_RDONLY; 522f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 523f9d7562fSJ. Bruce Fields return O_WRONLY; 524f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 525f9d7562fSJ. Bruce Fields return O_RDWR; 526f9d7562fSJ. Bruce Fields } 527f9d7562fSJ. Bruce Fields BUG(); 528f9d7562fSJ. Bruce Fields } 529f9d7562fSJ. Bruce Fields 53082c5ff1bSJeff Layton /* release all access and file references for a given stateid */ 53182c5ff1bSJeff Layton static void 53282c5ff1bSJeff Layton release_all_access(struct nfs4_ol_stateid *stp) 53382c5ff1bSJeff Layton { 53482c5ff1bSJeff Layton int i; 53582c5ff1bSJeff Layton 53682c5ff1bSJeff Layton for (i = 1; i < 4; i++) { 53782c5ff1bSJeff Layton if (test_access(i, stp)) 53882c5ff1bSJeff Layton nfs4_file_put_access(stp->st_file, 53982c5ff1bSJeff Layton nfs4_access_to_omode(i)); 54082c5ff1bSJeff Layton clear_access(i, stp); 54182c5ff1bSJeff Layton } 54282c5ff1bSJeff Layton } 54382c5ff1bSJeff Layton 544dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 545529d7b2aSJ. Bruce Fields { 546529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 547529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 548529d7b2aSJ. Bruce Fields } 549529d7b2aSJ. Bruce Fields 550dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 551529d7b2aSJ. Bruce Fields { 55282c5ff1bSJeff Layton release_all_access(stp); 553a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5544665e2baSJ. Bruce Fields stp->st_file = NULL; 5554665e2baSJ. Bruce Fields } 5564665e2baSJ. Bruce Fields 557dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5584665e2baSJ. Bruce Fields { 559529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 560529d7b2aSJ. Bruce Fields } 561529d7b2aSJ. Bruce Fields 562dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 563529d7b2aSJ. Bruce Fields { 564529d7b2aSJ. Bruce Fields struct file *file; 565529d7b2aSJ. Bruce Fields 566529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5676136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 568529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 569529d7b2aSJ. Bruce Fields if (file) 570fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 57138c387b5SJ. Bruce Fields close_generic_stateid(stp); 572529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 573529d7b2aSJ. Bruce Fields } 574529d7b2aSJ. Bruce Fields 575fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 576529d7b2aSJ. Bruce Fields { 577dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 578529d7b2aSJ. Bruce Fields 579fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 580fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 581009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 582fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 583fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 584dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 585529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 586529d7b2aSJ. Bruce Fields } 587529d7b2aSJ. Bruce Fields } 588529d7b2aSJ. Bruce Fields 589fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 590529d7b2aSJ. Bruce Fields { 591fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 592fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 593529d7b2aSJ. Bruce Fields } 594529d7b2aSJ. Bruce Fields 595529d7b2aSJ. Bruce Fields static void 596dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 597529d7b2aSJ. Bruce Fields { 598fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 599529d7b2aSJ. Bruce Fields 600529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 601fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 602fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 603fe0750e5SJ. Bruce Fields release_lockowner(lo); 604529d7b2aSJ. Bruce Fields } 605529d7b2aSJ. Bruce Fields } 606529d7b2aSJ. Bruce Fields 60738c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 6082283963fSJ. Bruce Fields { 6092283963fSJ. Bruce Fields unhash_generic_stateid(stp); 6102283963fSJ. Bruce Fields release_stateid_lockowners(stp); 61138c387b5SJ. Bruce Fields close_generic_stateid(stp); 61238c387b5SJ. Bruce Fields } 61338c387b5SJ. Bruce Fields 61438c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 61538c387b5SJ. Bruce Fields { 61638c387b5SJ. Bruce Fields unhash_open_stateid(stp); 6176136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 6182283963fSJ. Bruce Fields free_generic_stateid(stp); 6192283963fSJ. Bruce Fields } 6202283963fSJ. Bruce Fields 621fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 622f1d110caSJ. Bruce Fields { 623dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 624f1d110caSJ. Bruce Fields 625fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 626fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 627fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 628fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 629dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 630f1d110caSJ. Bruce Fields release_open_stateid(stp); 631f1d110caSJ. Bruce Fields } 632f1d110caSJ. Bruce Fields } 633f1d110caSJ. Bruce Fields 634f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 635f7a4d872SJ. Bruce Fields { 636f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 637f7a4d872SJ. Bruce Fields 638f7a4d872SJ. Bruce Fields if (s) { 6396136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 640f7a4d872SJ. Bruce Fields free_generic_stateid(s); 641f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 642f7a4d872SJ. Bruce Fields } 643f7a4d872SJ. Bruce Fields } 644f7a4d872SJ. Bruce Fields 645fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 646f1d110caSJ. Bruce Fields { 647fe0750e5SJ. Bruce Fields unhash_openowner(oo); 648fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 649f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 650fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 651f1d110caSJ. Bruce Fields } 652f1d110caSJ. Bruce Fields 6535282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6545282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6555282fd72SMarc Eshel 6565282fd72SMarc Eshel static inline int 6575282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6585282fd72SMarc Eshel { 6595282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6605282fd72SMarc Eshel 6615282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6625282fd72SMarc Eshel } 6635282fd72SMarc Eshel 6648f199b82STrond Myklebust #ifdef NFSD_DEBUG 6655282fd72SMarc Eshel static inline void 6665282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6675282fd72SMarc Eshel { 6685282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6695282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6705282fd72SMarc Eshel } 6718f199b82STrond Myklebust #else 6728f199b82STrond Myklebust static inline void 6738f199b82STrond Myklebust dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6748f199b82STrond Myklebust { 6758f199b82STrond Myklebust } 6768f199b82STrond Myklebust #endif 6778f199b82STrond Myklebust 6785282fd72SMarc Eshel 679ec6b5d7bSAndy Adamson static void 680ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 681ec6b5d7bSAndy Adamson { 682ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 683ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 684ec6b5d7bSAndy Adamson 685ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 686ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 687ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 688ec6b5d7bSAndy Adamson sid->reserved = 0; 689ec6b5d7bSAndy Adamson } 690ec6b5d7bSAndy Adamson 691ec6b5d7bSAndy Adamson /* 692a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 693a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 694a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 695a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 696a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 697a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 698a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 699a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 700a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 701a649637cSAndy Adamson * for the SEQUENCE op response: 702ec6b5d7bSAndy Adamson */ 703a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 704a649637cSAndy Adamson 705557ce264SAndy Adamson static void 706557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 707557ce264SAndy Adamson { 708557ce264SAndy Adamson int i; 709557ce264SAndy Adamson 710557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 711557ce264SAndy Adamson kfree(ses->se_slots[i]); 712557ce264SAndy Adamson } 713557ce264SAndy Adamson 714efe0cb6dSJ. Bruce Fields /* 715efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 716efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 717efe0cb6dSJ. Bruce Fields */ 718efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 719efe0cb6dSJ. Bruce Fields { 720efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 721efe0cb6dSJ. Bruce Fields } 722efe0cb6dSJ. Bruce Fields 7235b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 724ec6b5d7bSAndy Adamson { 7255b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 7265b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 727ec6b5d7bSAndy Adamson 7285b6feee9SJ. Bruce Fields return size; 729557ce264SAndy Adamson } 730557ce264SAndy Adamson 7315b6feee9SJ. Bruce Fields /* 7325b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 7335b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 73442b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 7355b6feee9SJ. Bruce Fields */ 7365b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 7375b6feee9SJ. Bruce Fields { 7385b6feee9SJ. Bruce Fields int avail; 7395b6feee9SJ. Bruce Fields 7405b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 7415b6feee9SJ. Bruce Fields 7425b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7435b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 7445b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 7455b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 7465b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 7475b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7485b6feee9SJ. Bruce Fields 7495b6feee9SJ. Bruce Fields return num; 7505b6feee9SJ. Bruce Fields } 7515b6feee9SJ. Bruce Fields 7525b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 7535b6feee9SJ. Bruce Fields { 7545b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 7555b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 7565b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 7575b6feee9SJ. Bruce Fields } 7585b6feee9SJ. Bruce Fields 7595b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7605b6feee9SJ. Bruce Fields { 7615b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7625b6feee9SJ. Bruce Fields int mem, i; 763ec6b5d7bSAndy Adamson 764c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 765ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7665b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 767ec6b5d7bSAndy Adamson 7685b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7696c18ba9fSAlexandros Batsakis if (!new) 7705b6feee9SJ. Bruce Fields return NULL; 771ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7725b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7735b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7745b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7755b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 776ec6b5d7bSAndy Adamson goto out_free; 777ec6b5d7bSAndy Adamson } 7785b6feee9SJ. Bruce Fields return new; 7795b6feee9SJ. Bruce Fields out_free: 7805b6feee9SJ. Bruce Fields while (i--) 7815b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7825b6feee9SJ. Bruce Fields kfree(new); 7835b6feee9SJ. Bruce Fields return NULL; 7845b6feee9SJ. Bruce Fields } 7855b6feee9SJ. Bruce Fields 7865b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7875b6feee9SJ. Bruce Fields { 7885b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7895b6feee9SJ. Bruce Fields 7905b6feee9SJ. Bruce Fields new->maxreqs = numslots; 791d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 792d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7935b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7945b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7955b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7965b6feee9SJ. Bruce Fields } 7975b6feee9SJ. Bruce Fields 79819cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 79919cf5c02SJ. Bruce Fields { 80019cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 80119cf5c02SJ. Bruce Fields kfree(c); 80219cf5c02SJ. Bruce Fields } 80319cf5c02SJ. Bruce Fields 80419cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 80519cf5c02SJ. Bruce Fields { 80619cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 80719cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 80819cf5c02SJ. Bruce Fields 80919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 81019cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 81119cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 81219cf5c02SJ. Bruce Fields free_conn(c); 81319cf5c02SJ. Bruce Fields } 81419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 815eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 81619cf5c02SJ. Bruce Fields } 81719cf5c02SJ. Bruce Fields 818d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 819c7662518SJ. Bruce Fields { 820c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 821c7662518SJ. Bruce Fields 822c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 823c7662518SJ. Bruce Fields if (!conn) 824db90681dSJ. Bruce Fields return NULL; 825c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 826c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 827d29c374cSJ. Bruce Fields conn->cn_flags = flags; 828db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 829db90681dSJ. Bruce Fields return conn; 830db90681dSJ. Bruce Fields } 831db90681dSJ. Bruce Fields 832328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 833328ead28SJ. Bruce Fields { 834328ead28SJ. Bruce Fields conn->cn_session = ses; 835328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 836328ead28SJ. Bruce Fields } 837328ead28SJ. Bruce Fields 838db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 839db90681dSJ. Bruce Fields { 840db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 841c7662518SJ. Bruce Fields 842c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 843328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 844c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 845db90681dSJ. Bruce Fields } 846c7662518SJ. Bruce Fields 84721b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 848db90681dSJ. Bruce Fields { 84919cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 85021b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 851db90681dSJ. Bruce Fields } 852db90681dSJ. Bruce Fields 8531d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 854db90681dSJ. Bruce Fields { 855db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 85621b75b01SJ. Bruce Fields int ret; 857db90681dSJ. Bruce Fields 8581d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 859db90681dSJ. Bruce Fields if (!conn) 860db90681dSJ. Bruce Fields return nfserr_jukebox; 861db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 86221b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 86321b75b01SJ. Bruce Fields if (ret) 86421b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 86521b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 86624119673SWeston Andros Adamson if (ses->se_client->cl_cb_state == NFSD4_CB_DOWN && 86724119673SWeston Andros Adamson dir & NFS4_CDFC4_BACK) { 86824119673SWeston Andros Adamson /* callback channel may be back up */ 86924119673SWeston Andros Adamson nfsd4_probe_callback(ses->se_client); 87024119673SWeston Andros Adamson } 871c7662518SJ. Bruce Fields return nfs_ok; 872c7662518SJ. Bruce Fields } 873c7662518SJ. Bruce Fields 8741d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8751d1bc8f2SJ. Bruce Fields { 8761d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8771d1bc8f2SJ. Bruce Fields 8781d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8791d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8801d1bc8f2SJ. Bruce Fields 8811d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8821d1bc8f2SJ. Bruce Fields } 8831d1bc8f2SJ. Bruce Fields 8841d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 88519cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 886c7662518SJ. Bruce Fields { 88719cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 88819cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 88919cf5c02SJ. Bruce Fields 89019cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 89119cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 89219cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 89319cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 89419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 89519cf5c02SJ. Bruce Fields 89619cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 89719cf5c02SJ. Bruce Fields free_conn(c); 89819cf5c02SJ. Bruce Fields 89919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 90019cf5c02SJ. Bruce Fields } 90119cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 902c7662518SJ. Bruce Fields } 903c7662518SJ. Bruce Fields 904508dc6e1SBenny Halevy static void free_session(struct kref *kref) 905c7662518SJ. Bruce Fields { 906c7662518SJ. Bruce Fields struct nfsd4_session *ses; 907c7662518SJ. Bruce Fields int mem; 908c7662518SJ. Bruce Fields 909bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 910c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 91119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 912c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 913c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 914c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 915c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 916c7662518SJ. Bruce Fields free_session_slots(ses); 917c7662518SJ. Bruce Fields kfree(ses); 918c7662518SJ. Bruce Fields } 919c7662518SJ. Bruce Fields 920508dc6e1SBenny Halevy void nfsd4_put_session(struct nfsd4_session *ses) 921508dc6e1SBenny Halevy { 922508dc6e1SBenny Halevy spin_lock(&client_lock); 923508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 924508dc6e1SBenny Halevy spin_unlock(&client_lock); 925508dc6e1SBenny Halevy } 926508dc6e1SBenny Halevy 927ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 9285b6feee9SJ. Bruce Fields { 9295b6feee9SJ. Bruce Fields struct nfsd4_session *new; 9305b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 9315b6feee9SJ. Bruce Fields int numslots, slotsize; 93257b7b43bSJ. Bruce Fields __be32 status; 9335b6feee9SJ. Bruce Fields int idx; 9345b6feee9SJ. Bruce Fields 9355b6feee9SJ. Bruce Fields /* 9365b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 9375b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 9385b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 9395b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 9405b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 9415b6feee9SJ. Bruce Fields */ 9425b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 9435b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 944ced6dfe9SMi Jinlong if (numslots < 1) 945ced6dfe9SMi Jinlong return NULL; 9465b6feee9SJ. Bruce Fields 9475b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 9485b6feee9SJ. Bruce Fields if (!new) { 9495b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 950ac7c46f2SJ. Bruce Fields return NULL; 9515b6feee9SJ. Bruce Fields } 9525b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 953ec6b5d7bSAndy Adamson 954ec6b5d7bSAndy Adamson new->se_client = clp; 955ec6b5d7bSAndy Adamson gen_sessionid(new); 956ec6b5d7bSAndy Adamson 957c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 958c7662518SJ. Bruce Fields 959ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 960ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 9618b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 962ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 9635b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 9649089f1b4SBenny Halevy spin_lock(&client_lock); 965ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 9664c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 967ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 9684c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 9699089f1b4SBenny Halevy spin_unlock(&client_lock); 970ec6b5d7bSAndy Adamson 9711d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 972ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 973c7662518SJ. Bruce Fields if (status) { 974508dc6e1SBenny Halevy spin_lock(&client_lock); 975c7662518SJ. Bruce Fields free_session(&new->se_ref); 976508dc6e1SBenny Halevy spin_unlock(&client_lock); 977ac7c46f2SJ. Bruce Fields return NULL; 978c7662518SJ. Bruce Fields } 979dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 980edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 981dcbeaa68SJ. Bruce Fields /* 982dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 983dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 984dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 985dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 986dcbeaa68SJ. Bruce Fields * future: 987dcbeaa68SJ. Bruce Fields */ 988edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 989edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 990edd76786SJ. Bruce Fields } 991dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 992ac7c46f2SJ. Bruce Fields return new; 993ec6b5d7bSAndy Adamson } 994ec6b5d7bSAndy Adamson 9959089f1b4SBenny Halevy /* caller must hold client_lock */ 9965282fd72SMarc Eshel static struct nfsd4_session * 9975282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9985282fd72SMarc Eshel { 9995282fd72SMarc Eshel struct nfsd4_session *elem; 10005282fd72SMarc Eshel int idx; 10015282fd72SMarc Eshel 10025282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 10035282fd72SMarc Eshel idx = hash_sessionid(sessionid); 10045282fd72SMarc Eshel /* Search in the appropriate list */ 10055282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 10065282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 10075282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 10085282fd72SMarc Eshel return elem; 10095282fd72SMarc Eshel } 10105282fd72SMarc Eshel } 10115282fd72SMarc Eshel 10125282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 10135282fd72SMarc Eshel return NULL; 10145282fd72SMarc Eshel } 10155282fd72SMarc Eshel 10169089f1b4SBenny Halevy /* caller must hold client_lock */ 10177116ed6bSAndy Adamson static void 10185282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 10197116ed6bSAndy Adamson { 10207116ed6bSAndy Adamson list_del(&ses->se_hash); 10214c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 10227116ed6bSAndy Adamson list_del(&ses->se_perclnt); 10234c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 10245282fd72SMarc Eshel } 10255282fd72SMarc Eshel 102636acb66bSBenny Halevy /* must be called under the client_lock */ 10271da177e4SLinus Torvalds static inline void 102836acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 10291da177e4SLinus Torvalds { 103007cd4909SBenny Halevy if (is_client_expired(clp)) { 10317447758bSJ. Bruce Fields WARN_ON(1); 10327447758bSJ. Bruce Fields printk("%s: client (clientid %08x/%08x) already expired\n", 103307cd4909SBenny Halevy __func__, 103407cd4909SBenny Halevy clp->cl_clientid.cl_boot, 103507cd4909SBenny Halevy clp->cl_clientid.cl_id); 103607cd4909SBenny Halevy return; 103707cd4909SBenny Halevy } 103807cd4909SBenny Halevy 10391da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 10401da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 10411da177e4SLinus Torvalds clp->cl_clientid.cl_id); 10421da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 10431da177e4SLinus Torvalds clp->cl_time = get_seconds(); 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds 104636acb66bSBenny Halevy static inline void 104736acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 104836acb66bSBenny Halevy { 104936acb66bSBenny Halevy spin_lock(&client_lock); 105036acb66bSBenny Halevy renew_client_locked(clp); 105136acb66bSBenny Halevy spin_unlock(&client_lock); 105236acb66bSBenny Halevy } 105336acb66bSBenny Halevy 10541da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 10551da177e4SLinus Torvalds static int 10561da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 10571da177e4SLinus Torvalds { 10581da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 10591da177e4SLinus Torvalds return 0; 106060adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 106160adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 10621da177e4SLinus Torvalds return 1; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds /* 10661da177e4SLinus Torvalds * XXX Should we use a slab cache ? 10671da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 10681da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 10691da177e4SLinus Torvalds */ 107035bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 10711da177e4SLinus Torvalds { 10721da177e4SLinus Torvalds struct nfs4_client *clp; 10731da177e4SLinus Torvalds 107435bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 107535bba9a3SJ. Bruce Fields if (clp == NULL) 107635bba9a3SJ. Bruce Fields return NULL; 107767114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 107835bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 107935bba9a3SJ. Bruce Fields kfree(clp); 108035bba9a3SJ. Bruce Fields return NULL; 108135bba9a3SJ. Bruce Fields } 10821da177e4SLinus Torvalds clp->cl_name.len = name.len; 10831da177e4SLinus Torvalds return clp; 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static inline void 10871da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10881da177e4SLinus Torvalds { 1089bc2df47aSJ. Bruce Fields lockdep_assert_held(&client_lock); 1090792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1091792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1092792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1093792c95ddSJ. Bruce Fields se_perclnt); 1094792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1095508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1096792c95ddSJ. Bruce Fields } 109703a4e1f6SJ. Bruce Fields free_svc_cred(&clp->cl_cred); 10981da177e4SLinus Torvalds kfree(clp->cl_name.data); 10991da177e4SLinus Torvalds kfree(clp); 11001da177e4SLinus Torvalds } 11011da177e4SLinus Torvalds 1102d7682988SBenny Halevy void 1103d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1104d7682988SBenny Halevy { 1105d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1106d7682988SBenny Halevy 1107d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1108d7682988SBenny Halevy return; 1109d7682988SBenny Halevy if (is_client_expired(clp)) { 1110d7682988SBenny Halevy free_client(clp); 1111d7682988SBenny Halevy session->se_client = NULL; 1112d7682988SBenny Halevy } else 1113d7682988SBenny Halevy renew_client_locked(clp); 1114d7682988SBenny Halevy spin_unlock(&client_lock); 1115d7682988SBenny Halevy } 1116d7682988SBenny Halevy 111784d38ac9SBenny Halevy /* must be called under the client_lock */ 111884d38ac9SBenny Halevy static inline void 111984d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 112084d38ac9SBenny Halevy { 1121792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1122792c95ddSJ. Bruce Fields 112307cd4909SBenny Halevy mark_client_expired(clp); 112484d38ac9SBenny Halevy list_del(&clp->cl_lru); 11254c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1126792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1127792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 11284c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 112984d38ac9SBenny Halevy } 113084d38ac9SBenny Halevy 11311da177e4SLinus Torvalds static void 11321da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 11331da177e4SLinus Torvalds { 1134fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 11351da177e4SLinus Torvalds struct nfs4_delegation *dp; 11361da177e4SLinus Torvalds struct list_head reaplist; 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 11391da177e4SLinus Torvalds spin_lock(&recall_lock); 1140ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1141ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1142ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 11431da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 11441da177e4SLinus Torvalds } 11451da177e4SLinus Torvalds spin_unlock(&recall_lock); 11461da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 11471da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 11481da177e4SLinus Torvalds unhash_delegation(dp); 11491da177e4SLinus Torvalds } 1150ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1151fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1152fe0750e5SJ. Bruce Fields release_openowner(oo); 11531da177e4SLinus Torvalds } 11546ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 11552bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 11562bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 115784d38ac9SBenny Halevy list_del(&clp->cl_idhash); 115884d38ac9SBenny Halevy list_del(&clp->cl_strhash); 115984d38ac9SBenny Halevy spin_lock(&client_lock); 116084d38ac9SBenny Halevy unhash_client_locked(clp); 116146583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1162b12a05cbSJ. Bruce Fields free_client(clp); 116346583e25SBenny Halevy spin_unlock(&client_lock); 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 116635bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 116735bba9a3SJ. Bruce Fields { 116835bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 116935bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 117235bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 117335bba9a3SJ. Bruce Fields { 11741da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11751da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds 117803a4e1f6SJ. Bruce Fields static int copy_cred(struct svc_cred *target, struct svc_cred *source) 117935bba9a3SJ. Bruce Fields { 118003a4e1f6SJ. Bruce Fields if (source->cr_principal) { 118103a4e1f6SJ. Bruce Fields target->cr_principal = 118203a4e1f6SJ. Bruce Fields kstrdup(source->cr_principal, GFP_KERNEL); 118303a4e1f6SJ. Bruce Fields if (target->cr_principal == NULL) 118403a4e1f6SJ. Bruce Fields return -ENOMEM; 118503a4e1f6SJ. Bruce Fields } else 118603a4e1f6SJ. Bruce Fields target->cr_principal = NULL; 1187d5497fc6SJ. Bruce Fields target->cr_flavor = source->cr_flavor; 11881da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11891da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11901da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11911da177e4SLinus Torvalds get_group_info(target->cr_group_info); 119203a4e1f6SJ. Bruce Fields return 0; 11931da177e4SLinus Torvalds } 11941da177e4SLinus Torvalds 119535bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1196599e0a22SJ. Bruce Fields { 1197a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds static int 1201599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1202599e0a22SJ. Bruce Fields { 1203599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds static int 1207599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1208599e0a22SJ. Bruce Fields { 1209599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12128fbba96eSJ. Bruce Fields static bool groups_equal(struct group_info *g1, struct group_info *g2) 12138fbba96eSJ. Bruce Fields { 12148fbba96eSJ. Bruce Fields int i; 12158fbba96eSJ. Bruce Fields 12168fbba96eSJ. Bruce Fields if (g1->ngroups != g2->ngroups) 12178fbba96eSJ. Bruce Fields return false; 12188fbba96eSJ. Bruce Fields for (i=0; i<g1->ngroups; i++) 12198fbba96eSJ. Bruce Fields if (GROUP_AT(g1, i) != GROUP_AT(g2, i)) 12208fbba96eSJ. Bruce Fields return false; 12218fbba96eSJ. Bruce Fields return true; 12228fbba96eSJ. Bruce Fields } 12238fbba96eSJ. Bruce Fields 12241da177e4SLinus Torvalds static int 1225599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1226599e0a22SJ. Bruce Fields { 1227d5497fc6SJ. Bruce Fields if ((cr1->cr_flavor != cr2->cr_flavor) 1228d5497fc6SJ. Bruce Fields || (cr1->cr_uid != cr2->cr_uid) 12298fbba96eSJ. Bruce Fields || (cr1->cr_gid != cr2->cr_gid) 12308fbba96eSJ. Bruce Fields || !groups_equal(cr1->cr_group_info, cr2->cr_group_info)) 12318fbba96eSJ. Bruce Fields return false; 12328fbba96eSJ. Bruce Fields if (cr1->cr_principal == cr2->cr_principal) 12338fbba96eSJ. Bruce Fields return true; 12348fbba96eSJ. Bruce Fields if (!cr1->cr_principal || !cr2->cr_principal) 12358fbba96eSJ. Bruce Fields return false; 12368fbba96eSJ. Bruce Fields return 0 == strcmp(cr1->cr_principal, cr1->cr_principal); 12371da177e4SLinus Torvalds } 12381da177e4SLinus Torvalds 12395ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 12405ec7b46cSJ. Bruce Fields { 12415ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 12425ec7b46cSJ. Bruce Fields 12431da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 12441da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 12451da177e4SLinus Torvalds } 12461da177e4SLinus Torvalds 1247deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1248deda2faaSJ. Bruce Fields { 1249ab4684d1SChuck Lever __be32 verf[2]; 1250deda2faaSJ. Bruce Fields static u32 i; 12511da177e4SLinus Torvalds 1252ab4684d1SChuck Lever verf[0] = (__be32)get_seconds(); 1253ab4684d1SChuck Lever verf[1] = (__be32)i++; 1254ab4684d1SChuck Lever memcpy(clp->cl_confirm.data, verf, sizeof(clp->cl_confirm.data)); 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 125738c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 12584581d140SJ. Bruce Fields { 125938c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 12604581d140SJ. Bruce Fields } 12614d71ab87SJ. Bruce Fields 126238c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1263f459e453SJ. Bruce Fields { 1264f459e453SJ. Bruce Fields struct nfs4_stid *s; 1265f459e453SJ. Bruce Fields 126638c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1267f459e453SJ. Bruce Fields if (!s) 1268f459e453SJ. Bruce Fields return NULL; 1269f459e453SJ. Bruce Fields if (typemask & s->sc_type) 12704d71ab87SJ. Bruce Fields return s; 12714581d140SJ. Bruce Fields return NULL; 12724581d140SJ. Bruce Fields } 12734581d140SJ. Bruce Fields 1274b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1275b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1276b09333c4SRicardo Labiaga { 1277b09333c4SRicardo Labiaga struct nfs4_client *clp; 1278b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 127903a4e1f6SJ. Bruce Fields int ret; 1280b09333c4SRicardo Labiaga 1281b09333c4SRicardo Labiaga clp = alloc_client(name); 1282b09333c4SRicardo Labiaga if (clp == NULL) 1283b09333c4SRicardo Labiaga return NULL; 1284b09333c4SRicardo Labiaga 1285792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 128603a4e1f6SJ. Bruce Fields ret = copy_cred(&clp->cl_cred, &rqstp->rq_cred); 128703a4e1f6SJ. Bruce Fields if (ret) { 1288508dc6e1SBenny Halevy spin_lock(&client_lock); 1289b09333c4SRicardo Labiaga free_client(clp); 1290508dc6e1SBenny Halevy spin_unlock(&client_lock); 1291b09333c4SRicardo Labiaga return NULL; 1292b09333c4SRicardo Labiaga } 129338c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1294b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 129546583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 129677a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1297b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1298b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1299b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1300b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1301b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 13025ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 13036ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1304cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 130507cd4909SBenny Halevy clp->cl_time = get_seconds(); 1306b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1307b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1308b09333c4SRicardo Labiaga copy_verf(clp, verf); 1309b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1310b09333c4SRicardo Labiaga gen_confirm(clp); 1311edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1312b09333c4SRicardo Labiaga return clp; 1313b09333c4SRicardo Labiaga } 1314b09333c4SRicardo Labiaga 1315fd39ca9aSNeilBrown static void 13161da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 13171da177e4SLinus Torvalds { 13181da177e4SLinus Torvalds unsigned int idhashval; 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 13211da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13221da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 132336acb66bSBenny Halevy renew_client(clp); 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 1326fd39ca9aSNeilBrown static void 13271da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 13281da177e4SLinus Torvalds { 13291da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 13301da177e4SLinus Torvalds unsigned int strhashval; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1333f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1334a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1335328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 13361da177e4SLinus Torvalds renew_client(clp); 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds static struct nfs4_client * 13401da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 13411da177e4SLinus Torvalds { 13421da177e4SLinus Torvalds struct nfs4_client *clp; 13431da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13441da177e4SLinus Torvalds 13451da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1346a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1347a50d2ad1SJ. Bruce Fields renew_client(clp); 13481da177e4SLinus Torvalds return clp; 13491da177e4SLinus Torvalds } 1350a50d2ad1SJ. Bruce Fields } 13511da177e4SLinus Torvalds return NULL; 13521da177e4SLinus Torvalds } 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds static struct nfs4_client * 13551da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 13561da177e4SLinus Torvalds { 13571da177e4SLinus Torvalds struct nfs4_client *clp; 13581da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1361599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 13621da177e4SLinus Torvalds return clp; 13631da177e4SLinus Torvalds } 13641da177e4SLinus Torvalds return NULL; 13651da177e4SLinus Torvalds } 13661da177e4SLinus Torvalds 13676e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1368a1bcecd2SAndy Adamson { 13696e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1370a1bcecd2SAndy Adamson } 1371a1bcecd2SAndy Adamson 137228ce6054SNeilBrown static struct nfs4_client * 1373e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 137428ce6054SNeilBrown { 137528ce6054SNeilBrown struct nfs4_client *clp; 137628ce6054SNeilBrown 137728ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1378e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 137928ce6054SNeilBrown return clp; 138028ce6054SNeilBrown } 138128ce6054SNeilBrown return NULL; 138228ce6054SNeilBrown } 138328ce6054SNeilBrown 138428ce6054SNeilBrown static struct nfs4_client * 1385e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 138628ce6054SNeilBrown { 138728ce6054SNeilBrown struct nfs4_client *clp; 138828ce6054SNeilBrown 138928ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1390e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 139128ce6054SNeilBrown return clp; 139228ce6054SNeilBrown } 139328ce6054SNeilBrown return NULL; 139428ce6054SNeilBrown } 139528ce6054SNeilBrown 1396fd39ca9aSNeilBrown static void 13976f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 13981da177e4SLinus Torvalds { 139907263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 14006f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 14016f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 14027077ecbaSJeff Layton unsigned short expected_family; 14031da177e4SLinus Torvalds 14047077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 14057077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 14067077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 14077077ecbaSJeff Layton expected_family = AF_INET; 14087077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 14097077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 14107077ecbaSJeff Layton expected_family = AF_INET6; 14117077ecbaSJeff Layton else 14121da177e4SLinus Torvalds goto out_err; 14131da177e4SLinus Torvalds 1414f2ac4dc9SStanislav Kinsbursky conn->cb_addrlen = rpc_uaddr2sockaddr(&init_net, se->se_callback_addr_val, 1415aa9a4ec7SJeff Layton se->se_callback_addr_len, 141607263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 141707263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1418aa9a4ec7SJeff Layton 141907263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 14201da177e4SLinus Torvalds goto out_err; 1421aa9a4ec7SJeff Layton 142207263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 142307263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1424fbf4665fSJeff Layton 142507263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 142607263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1427849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 14281da177e4SLinus Torvalds return; 14291da177e4SLinus Torvalds out_err: 143007263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 143107263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1432849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 14331da177e4SLinus Torvalds "will not receive delegations\n", 14341da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds return; 14371da177e4SLinus Torvalds } 14381da177e4SLinus Torvalds 1439074fe897SAndy Adamson /* 1440557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1441074fe897SAndy Adamson */ 1442074fe897SAndy Adamson void 1443074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1444074fe897SAndy Adamson { 1445557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1446557ce264SAndy Adamson unsigned int base; 1447074fe897SAndy Adamson 1448557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1449074fe897SAndy Adamson 1450557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1451557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1452bf864a31SAndy Adamson 1453bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1454bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1455557ce264SAndy Adamson slot->sl_datalen = 0; 1456bf864a31SAndy Adamson return; 1457bf864a31SAndy Adamson } 1458557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1459557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1460557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1461557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1462557ce264SAndy Adamson slot->sl_datalen)) 1463557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1464557ce264SAndy Adamson return; 1465074fe897SAndy Adamson } 1466074fe897SAndy Adamson 1467074fe897SAndy Adamson /* 1468abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1469abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1470abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1471abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1472abfabf8cSAndy Adamson * 1473074fe897SAndy Adamson */ 1474abfabf8cSAndy Adamson static __be32 1475abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1476abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1477074fe897SAndy Adamson { 1478abfabf8cSAndy Adamson struct nfsd4_op *op; 1479abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1480074fe897SAndy Adamson 1481abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1482abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1483abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1484abfabf8cSAndy Adamson 1485abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 148673e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1487abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1488abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1489abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1490074fe897SAndy Adamson } 1491abfabf8cSAndy Adamson return op->status; 1492074fe897SAndy Adamson } 1493074fe897SAndy Adamson 1494074fe897SAndy Adamson /* 1495557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1496557ce264SAndy Adamson * session values. 1497074fe897SAndy Adamson */ 1498074fe897SAndy Adamson __be32 1499bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1500bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1501074fe897SAndy Adamson { 1502557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1503074fe897SAndy Adamson __be32 status; 1504074fe897SAndy Adamson 1505557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1506074fe897SAndy Adamson 1507abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1508abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1509abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1510abfabf8cSAndy Adamson return status; 1511074fe897SAndy Adamson 1512557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1513557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1514074fe897SAndy Adamson 1515557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1516557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1517557ce264SAndy Adamson status = slot->sl_status; 1518074fe897SAndy Adamson 1519074fe897SAndy Adamson return status; 1520074fe897SAndy Adamson } 1521074fe897SAndy Adamson 15220733d213SAndy Adamson /* 15230733d213SAndy Adamson * Set the exchange_id flags returned by the server. 15240733d213SAndy Adamson */ 15250733d213SAndy Adamson static void 15260733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 15270733d213SAndy Adamson { 15280733d213SAndy Adamson /* pNFS is not supported */ 15290733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 15300733d213SAndy Adamson 15310733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 15320733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 15330733d213SAndy Adamson 15340733d213SAndy Adamson /* set the wire flags to return to client. */ 15350733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 15360733d213SAndy Adamson } 15370733d213SAndy Adamson 1538631fc9eaSJ. Bruce Fields static bool client_has_state(struct nfs4_client *clp) 1539631fc9eaSJ. Bruce Fields { 1540631fc9eaSJ. Bruce Fields /* 1541631fc9eaSJ. Bruce Fields * Note clp->cl_openowners check isn't quite right: there's no 1542631fc9eaSJ. Bruce Fields * need to count owners without stateid's. 1543631fc9eaSJ. Bruce Fields * 1544631fc9eaSJ. Bruce Fields * Also note we should probably be using this in 4.0 case too. 1545631fc9eaSJ. Bruce Fields */ 15466eccece9SJ. Bruce Fields return !list_empty(&clp->cl_openowners) 15476eccece9SJ. Bruce Fields || !list_empty(&clp->cl_delegations) 15486eccece9SJ. Bruce Fields || !list_empty(&clp->cl_sessions); 1549631fc9eaSJ. Bruce Fields } 1550631fc9eaSJ. Bruce Fields 1551b37ad28bSAl Viro __be32 1552069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1553069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1554069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1555069b6ad4SAndy Adamson { 15560733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 155757b7b43bSJ. Bruce Fields __be32 status; 15580733d213SAndy Adamson unsigned int strhashval; 15590733d213SAndy Adamson char dname[HEXDIR_LEN]; 1560363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 15610733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1562363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 156383e08fd4SJ. Bruce Fields bool update = exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A; 15640733d213SAndy Adamson 1565363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 15660733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1567363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 15680733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1569363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 15700733d213SAndy Adamson 1571a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 15720733d213SAndy Adamson return nfserr_inval; 15730733d213SAndy Adamson 15740733d213SAndy Adamson /* Currently only support SP4_NONE */ 15750733d213SAndy Adamson switch (exid->spa_how) { 15760733d213SAndy Adamson case SP4_NONE: 15770733d213SAndy Adamson break; 15780733d213SAndy Adamson case SP4_SSV: 1579044bc1d4SJ. Bruce Fields return nfserr_serverfault; 15800733d213SAndy Adamson default: 15810733d213SAndy Adamson BUG(); /* checked by xdr code */ 15820733d213SAndy Adamson case SP4_MACH_CRED: 15830733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 15840733d213SAndy Adamson } 15850733d213SAndy Adamson 15860733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 15870733d213SAndy Adamson 15880733d213SAndy Adamson if (status) 15892786cc3aSJ. Bruce Fields return status; 15900733d213SAndy Adamson 15910733d213SAndy Adamson strhashval = clientstr_hashval(dname); 15920733d213SAndy Adamson 15932dbb269dSJ. Bruce Fields /* Cases below refer to rfc 5661 section 18.35.4: */ 15940733d213SAndy Adamson nfs4_lock_state(); 1595e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 15960733d213SAndy Adamson if (conf) { 159783e08fd4SJ. Bruce Fields bool creds_match = same_creds(&conf->cl_cred, &rqstp->rq_cred); 159883e08fd4SJ. Bruce Fields bool verfs_match = same_verf(&verf, &conf->cl_verifier); 159983e08fd4SJ. Bruce Fields 1600136e658dSJ. Bruce Fields if (update) { 1601136e658dSJ. Bruce Fields if (!clp_used_exchangeid(conf)) { /* buggy client */ 16022dbb269dSJ. Bruce Fields status = nfserr_inval; 1603e203d506SJ. Bruce Fields goto out; 1604e203d506SJ. Bruce Fields } 16052dbb269dSJ. Bruce Fields if (!creds_match) { /* case 9 */ 16060733d213SAndy Adamson status = nfserr_perm; 16070733d213SAndy Adamson goto out; 16080733d213SAndy Adamson } 16092dbb269dSJ. Bruce Fields if (!verfs_match) { /* case 8 */ 16100733d213SAndy Adamson status = nfserr_not_same; 16110733d213SAndy Adamson goto out; 16120733d213SAndy Adamson } 1613136e658dSJ. Bruce Fields /* case 6 */ 16140733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 16150733d213SAndy Adamson new = conf; 16160733d213SAndy Adamson goto out_copy; 16176ddbbbfeSMike Sager } 1618136e658dSJ. Bruce Fields if (!creds_match) { /* case 3 */ 1619631fc9eaSJ. Bruce Fields if (client_has_state(conf)) { 1620136e658dSJ. Bruce Fields status = nfserr_clid_inuse; 1621136e658dSJ. Bruce Fields goto out; 1622136e658dSJ. Bruce Fields } 1623b9831b59SJ. Bruce Fields expire_client(conf); 1624b9831b59SJ. Bruce Fields goto out_new; 1625631fc9eaSJ. Bruce Fields } 1626136e658dSJ. Bruce Fields if (verfs_match) { /* case 2 */ 16270f1ba0efSJ. Bruce Fields conf->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R; 1628136e658dSJ. Bruce Fields new = conf; 1629136e658dSJ. Bruce Fields goto out_copy; 1630136e658dSJ. Bruce Fields } 16312dbb269dSJ. Bruce Fields /* case 5, client reboot */ 16320733d213SAndy Adamson goto out_new; 16330733d213SAndy Adamson } 16346ddbbbfeSMike Sager 16352dbb269dSJ. Bruce Fields if (update) { /* case 7 */ 16360733d213SAndy Adamson status = nfserr_noent; 16370733d213SAndy Adamson goto out; 16380733d213SAndy Adamson } 16390733d213SAndy Adamson 1640e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 16412dbb269dSJ. Bruce Fields if (unconf) /* case 4, possible retry or client restart */ 16420733d213SAndy Adamson expire_client(unconf); 16430733d213SAndy Adamson 16442dbb269dSJ. Bruce Fields /* case 1 (normal case) */ 16450733d213SAndy Adamson out_new: 1646b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 16470733d213SAndy Adamson if (new == NULL) { 16484731030dSJ. Bruce Fields status = nfserr_jukebox; 16490733d213SAndy Adamson goto out; 16500733d213SAndy Adamson } 16510733d213SAndy Adamson 16520733d213SAndy Adamson gen_clid(new); 16530733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 16540733d213SAndy Adamson out_copy: 16550733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 16560733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 16570733d213SAndy Adamson 1658778df3f0SJ. Bruce Fields exid->seqid = new->cl_cs_slot.sl_seqid + 1; 16590733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 16600733d213SAndy Adamson 16610733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 166249557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 16630733d213SAndy Adamson status = nfs_ok; 16640733d213SAndy Adamson 16650733d213SAndy Adamson out: 16660733d213SAndy Adamson nfs4_unlock_state(); 16670733d213SAndy Adamson return status; 1668069b6ad4SAndy Adamson } 1669069b6ad4SAndy Adamson 167057b7b43bSJ. Bruce Fields static __be32 167188e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1672b85d4c01SBenny Halevy { 167388e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 167488e588d5SAndy Adamson slot_seqid); 1675b85d4c01SBenny Halevy 1676b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 167788e588d5SAndy Adamson if (slot_inuse) { 167888e588d5SAndy Adamson if (seqid == slot_seqid) 1679b85d4c01SBenny Halevy return nfserr_jukebox; 1680b85d4c01SBenny Halevy else 1681b85d4c01SBenny Halevy return nfserr_seq_misordered; 1682b85d4c01SBenny Halevy } 1683f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 168488e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1685b85d4c01SBenny Halevy return nfs_ok; 168688e588d5SAndy Adamson if (seqid == slot_seqid) 1687b85d4c01SBenny Halevy return nfserr_replay_cache; 1688b85d4c01SBenny Halevy return nfserr_seq_misordered; 1689b85d4c01SBenny Halevy } 1690b85d4c01SBenny Halevy 169149557cc7SAndy Adamson /* 169249557cc7SAndy Adamson * Cache the create session result into the create session single DRC 169349557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 169449557cc7SAndy Adamson * Do this for solo or embedded create session operations. 169549557cc7SAndy Adamson */ 169649557cc7SAndy Adamson static void 169749557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 169857b7b43bSJ. Bruce Fields struct nfsd4_clid_slot *slot, __be32 nfserr) 169949557cc7SAndy Adamson { 170049557cc7SAndy Adamson slot->sl_status = nfserr; 170149557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 170249557cc7SAndy Adamson } 170349557cc7SAndy Adamson 170449557cc7SAndy Adamson static __be32 170549557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 170649557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 170749557cc7SAndy Adamson { 170849557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 170949557cc7SAndy Adamson return slot->sl_status; 171049557cc7SAndy Adamson } 171149557cc7SAndy Adamson 17121b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 17131b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 17141b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17151b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 17161b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17171b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 17181b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 17191b74c25bSMi Jinlong 17201b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 17211b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 17221b74c25bSMi Jinlong 1 + /* status */ \ 17231b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 17241b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 17251b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 17261b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 17271b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 17281b74c25bSMi Jinlong 172957b7b43bSJ. Bruce Fields static bool check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 17301b74c25bSMi Jinlong { 17311b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 17321b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 17331b74c25bSMi Jinlong } 17341b74c25bSMi Jinlong 1735069b6ad4SAndy Adamson __be32 1736069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1737069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1738069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1739069b6ad4SAndy Adamson { 1740363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1741ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1742ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 174349557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 174486c3e16cSJ. Bruce Fields bool confirm_me = false; 174557b7b43bSJ. Bruce Fields __be32 status = 0; 1746ec6b5d7bSAndy Adamson 1747a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1748a62573dcSMi Jinlong return nfserr_inval; 1749a62573dcSMi Jinlong 1750ec6b5d7bSAndy Adamson nfs4_lock_state(); 1751ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1752ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1753ec6b5d7bSAndy Adamson 1754ec6b5d7bSAndy Adamson if (conf) { 175549557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 175649557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 175738eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 175849557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 175938eb76a5SAndy Adamson goto out; 176049557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1761ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 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 } 177049557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 177149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 177238eb76a5SAndy Adamson if (status) { 177338eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1774ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1775cd5b8144SJ. Bruce Fields goto out; 1776ec6b5d7bSAndy Adamson } 177786c3e16cSJ. Bruce Fields confirm_me = true; 1778ec6b5d7bSAndy Adamson conf = unconf; 1779ec6b5d7bSAndy Adamson } else { 1780ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1781ec6b5d7bSAndy Adamson goto out; 1782ec6b5d7bSAndy Adamson } 1783ec6b5d7bSAndy Adamson 1784408b79bcSJ. Bruce Fields /* 17858323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 17868323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 17878323c3b2SJ. Bruce Fields */ 17888323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 17898323c3b2SJ. Bruce Fields /* 1790408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1791408b79bcSJ. Bruce Fields */ 1792408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1793408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1794408b79bcSJ. Bruce Fields 17951b74c25bSMi Jinlong status = nfserr_toosmall; 17961b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17971b74c25bSMi Jinlong goto out; 17981b74c25bSMi Jinlong 1799ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1800ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1801ac7c46f2SJ. Bruce Fields if (!new) 1802ec6b5d7bSAndy Adamson goto out; 1803ac7c46f2SJ. Bruce Fields status = nfs_ok; 1804ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1805ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 180612050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 180712050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 180886c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 180949557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1810ec6b5d7bSAndy Adamson 181149557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 181249557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 1813b9831b59SJ. Bruce Fields if (confirm_me) { 1814b9831b59SJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 1815b9831b59SJ. Bruce Fields struct nfs4_client *old = 1816b9831b59SJ. Bruce Fields find_confirmed_client_by_str(conf->cl_recdir, hash); 1817b9831b59SJ. Bruce Fields if (old) 1818b9831b59SJ. Bruce Fields expire_client(old); 181986c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1820b9831b59SJ. Bruce Fields } 1821ec6b5d7bSAndy Adamson out: 1822ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1823ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1824ec6b5d7bSAndy Adamson return status; 1825069b6ad4SAndy Adamson } 1826069b6ad4SAndy Adamson 182757716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 182857716355SJ. Bruce Fields { 182957716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 183057716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 183157716355SJ. Bruce Fields 183257716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 183357716355SJ. Bruce Fields } 183457716355SJ. Bruce Fields 18351d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 18361d1bc8f2SJ. Bruce Fields { 18371d1bc8f2SJ. Bruce Fields switch (*dir) { 18381d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 18391d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 18401d1bc8f2SJ. Bruce Fields return nfs_ok; 18411d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 18421d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 18431d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 18441d1bc8f2SJ. Bruce Fields return nfs_ok; 18451d1bc8f2SJ. Bruce Fields }; 18461d1bc8f2SJ. Bruce Fields return nfserr_inval; 18471d1bc8f2SJ. Bruce Fields } 18481d1bc8f2SJ. Bruce Fields 18491d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 18501d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 18511d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 18521d1bc8f2SJ. Bruce Fields { 18531d1bc8f2SJ. Bruce Fields __be32 status; 18541d1bc8f2SJ. Bruce Fields 18551d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 18561d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 18571d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 18581d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 18591d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 18601d1bc8f2SJ. Bruce Fields * client_lock iself: */ 18611d1bc8f2SJ. Bruce Fields if (cstate->session) { 18621d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 18631d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 18641d1bc8f2SJ. Bruce Fields } 18651d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 18661d1bc8f2SJ. Bruce Fields if (!cstate->session) 18671d1bc8f2SJ. Bruce Fields return nfserr_badsession; 18681d1bc8f2SJ. Bruce Fields 18691d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 18701db2b9ddSBryan Schumaker if (!status) 18711d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 18721db2b9ddSBryan Schumaker return status; 18731d1bc8f2SJ. Bruce Fields } 18741d1bc8f2SJ. Bruce Fields 18755d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 18765d4cec2fSJ. Bruce Fields { 18775d4cec2fSJ. Bruce Fields if (!session) 18785d4cec2fSJ. Bruce Fields return 0; 18795d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 18805d4cec2fSJ. Bruce Fields } 18815d4cec2fSJ. Bruce Fields 1882069b6ad4SAndy Adamson __be32 1883069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1884069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1885069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1886069b6ad4SAndy Adamson { 1887e10e0cfcSBenny Halevy struct nfsd4_session *ses; 188857b7b43bSJ. Bruce Fields __be32 status = nfserr_badsession; 1889e10e0cfcSBenny Halevy 1890e10e0cfcSBenny Halevy /* Notes: 1891e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1892e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1893e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1894e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1895e10e0cfcSBenny Halevy */ 1896e10e0cfcSBenny Halevy 18975d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 189857716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 189957716355SJ. Bruce Fields return nfserr_not_only_op; 190057716355SJ. Bruce Fields } 1901e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 19029089f1b4SBenny Halevy spin_lock(&client_lock); 1903e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1904e10e0cfcSBenny Halevy if (!ses) { 19059089f1b4SBenny Halevy spin_unlock(&client_lock); 1906e10e0cfcSBenny Halevy goto out; 1907e10e0cfcSBenny Halevy } 1908e10e0cfcSBenny Halevy 1909e10e0cfcSBenny Halevy unhash_session(ses); 19109089f1b4SBenny Halevy spin_unlock(&client_lock); 1911e10e0cfcSBenny Halevy 1912ab707e15SBenny Halevy nfs4_lock_state(); 191384f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1914ab707e15SBenny Halevy nfs4_unlock_state(); 191519cf5c02SJ. Bruce Fields 1916508dc6e1SBenny Halevy spin_lock(&client_lock); 191719cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 1918508dc6e1SBenny Halevy nfsd4_put_session_locked(ses); 1919508dc6e1SBenny Halevy spin_unlock(&client_lock); 1920e10e0cfcSBenny Halevy status = nfs_ok; 1921e10e0cfcSBenny Halevy out: 1922e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1923e10e0cfcSBenny Halevy return status; 1924069b6ad4SAndy Adamson } 1925069b6ad4SAndy Adamson 1926a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1927328ead28SJ. Bruce Fields { 1928328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1929328ead28SJ. Bruce Fields 1930328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1931a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1932328ead28SJ. Bruce Fields return c; 1933328ead28SJ. Bruce Fields } 1934328ead28SJ. Bruce Fields } 1935328ead28SJ. Bruce Fields return NULL; 1936328ead28SJ. Bruce Fields } 1937328ead28SJ. Bruce Fields 1938a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1939328ead28SJ. Bruce Fields { 1940328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1941a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 194221b75b01SJ. Bruce Fields int ret; 1943328ead28SJ. Bruce Fields 1944328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1945a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1946328ead28SJ. Bruce Fields if (c) { 1947328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1948328ead28SJ. Bruce Fields free_conn(new); 1949328ead28SJ. Bruce Fields return; 1950328ead28SJ. Bruce Fields } 1951328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1952328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 195321b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 195421b75b01SJ. Bruce Fields if (ret) 195521b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 195621b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1957328ead28SJ. Bruce Fields return; 1958328ead28SJ. Bruce Fields } 1959328ead28SJ. Bruce Fields 1960868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1961868b89c3SMi Jinlong { 1962868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1963868b89c3SMi Jinlong 1964868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1965868b89c3SMi Jinlong } 1966868b89c3SMi Jinlong 1967ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1968ae82a8d0SMi Jinlong struct nfsd4_session *session) 1969ae82a8d0SMi Jinlong { 1970ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1971ae82a8d0SMi Jinlong 1972ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1973ae82a8d0SMi Jinlong } 1974ae82a8d0SMi Jinlong 1975069b6ad4SAndy Adamson __be32 1976b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1977069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1978069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1979069b6ad4SAndy Adamson { 1980f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1981b85d4c01SBenny Halevy struct nfsd4_session *session; 1982b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1983a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 198457b7b43bSJ. Bruce Fields __be32 status; 1985b85d4c01SBenny Halevy 1986f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1987f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1988f9bb94c4SAndy Adamson 1989a663bdd8SJ. Bruce Fields /* 1990a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1991a663bdd8SJ. Bruce Fields * below. 1992a663bdd8SJ. Bruce Fields */ 1993a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1994a663bdd8SJ. Bruce Fields if (!conn) 1995a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1996a663bdd8SJ. Bruce Fields 19979089f1b4SBenny Halevy spin_lock(&client_lock); 1998b85d4c01SBenny Halevy status = nfserr_badsession; 1999b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 2000b85d4c01SBenny Halevy if (!session) 2001b85d4c01SBenny Halevy goto out; 2002b85d4c01SBenny Halevy 2003868b89c3SMi Jinlong status = nfserr_too_many_ops; 2004868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 2005868b89c3SMi Jinlong goto out; 2006868b89c3SMi Jinlong 2007ae82a8d0SMi Jinlong status = nfserr_req_too_big; 2008ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 2009ae82a8d0SMi Jinlong goto out; 2010ae82a8d0SMi Jinlong 2011b85d4c01SBenny Halevy status = nfserr_badslot; 20126c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 2013b85d4c01SBenny Halevy goto out; 2014b85d4c01SBenny Halevy 2015557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 2016b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 2017b85d4c01SBenny Halevy 2018a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 2019a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 2020a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 2021a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 2022a8dfdaebSAndy Adamson 202373e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 202473e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 2025b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 2026bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 2027bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 2028bf5c43c8SJ. Bruce Fields goto out; 2029b85d4c01SBenny Halevy cstate->slot = slot; 2030b85d4c01SBenny Halevy cstate->session = session; 2031da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 2032557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 2033bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 2034da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 2035aaf84eb9SBenny Halevy goto out; 2036b85d4c01SBenny Halevy } 2037b85d4c01SBenny Halevy if (status) 2038b85d4c01SBenny Halevy goto out; 2039b85d4c01SBenny Halevy 2040a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 2041a663bdd8SJ. Bruce Fields conn = NULL; 2042328ead28SJ. Bruce Fields 2043b85d4c01SBenny Halevy /* Success! bump slot seqid */ 2044b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 2045bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 204673e79482SJ. Bruce Fields if (seq->cachethis) 204773e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 2048bf5c43c8SJ. Bruce Fields else 2049bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 2050b85d4c01SBenny Halevy 2051b85d4c01SBenny Halevy cstate->slot = slot; 2052b85d4c01SBenny Halevy cstate->session = session; 2053b85d4c01SBenny Halevy 2054b85d4c01SBenny Halevy out: 205526c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 2056aaf84eb9SBenny Halevy if (cstate->session) { 20570d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 20580d7bb719SJ. Bruce Fields 205936acb66bSBenny Halevy nfsd4_get_session(cstate->session); 20600d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 20615423732aSBenny Halevy switch (clp->cl_cb_state) { 20625423732aSBenny Halevy case NFSD4_CB_DOWN: 2063fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 20645423732aSBenny Halevy break; 20655423732aSBenny Halevy case NFSD4_CB_FAULT: 2066fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 20675423732aSBenny Halevy break; 2068fc0c3dd1SBenny Halevy default: 2069fc0c3dd1SBenny Halevy seq->status_flags = 0; 20705423732aSBenny Halevy } 2071aaf84eb9SBenny Halevy } 2072a663bdd8SJ. Bruce Fields kfree(conn); 207336acb66bSBenny Halevy spin_unlock(&client_lock); 2074b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 2075b85d4c01SBenny Halevy return status; 2076069b6ad4SAndy Adamson } 2077069b6ad4SAndy Adamson 2078345c2842SMi Jinlong __be32 2079345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 2080345c2842SMi Jinlong { 2081345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 208257b7b43bSJ. Bruce Fields __be32 status = 0; 2083345c2842SMi Jinlong 2084345c2842SMi Jinlong nfs4_lock_state(); 2085345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 2086345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 2087345c2842SMi Jinlong 2088345c2842SMi Jinlong if (conf) { 2089345c2842SMi Jinlong clp = conf; 2090345c2842SMi Jinlong 20916eccece9SJ. Bruce Fields if (!is_client_expired(conf) && client_has_state(conf)) { 2092345c2842SMi Jinlong status = nfserr_clientid_busy; 2093345c2842SMi Jinlong goto out; 2094345c2842SMi Jinlong } 2095345c2842SMi Jinlong 2096345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2097345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2098345c2842SMi Jinlong status = nfserr_clientid_busy; 2099345c2842SMi Jinlong goto out; 2100345c2842SMi Jinlong } 2101345c2842SMi Jinlong } else if (unconf) 2102345c2842SMi Jinlong clp = unconf; 2103345c2842SMi Jinlong else { 2104345c2842SMi Jinlong status = nfserr_stale_clientid; 2105345c2842SMi Jinlong goto out; 2106345c2842SMi Jinlong } 2107345c2842SMi Jinlong 2108345c2842SMi Jinlong expire_client(clp); 2109345c2842SMi Jinlong out: 2110345c2842SMi Jinlong nfs4_unlock_state(); 2111345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2112345c2842SMi Jinlong return status; 2113345c2842SMi Jinlong } 2114345c2842SMi Jinlong 2115069b6ad4SAndy Adamson __be32 21164dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 21174dc6ec00SJ. Bruce Fields { 211857b7b43bSJ. Bruce Fields __be32 status = 0; 2119bcecf1ccSMi Jinlong 21204dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 21214dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 21224dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 21234dc6ec00SJ. Bruce Fields /* 21244dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 21254dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 21264dc6ec00SJ. Bruce Fields */ 21274dc6ec00SJ. Bruce Fields return nfs_ok; 21284dc6ec00SJ. Bruce Fields } 2129bcecf1ccSMi Jinlong 21304dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2131bcecf1ccSMi Jinlong status = nfserr_complete_already; 2132a52d726bSJeff Layton if (test_and_set_bit(NFSD4_CLIENT_RECLAIM_COMPLETE, 2133a52d726bSJeff Layton &cstate->session->se_client->cl_flags)) 2134bcecf1ccSMi Jinlong goto out; 2135bcecf1ccSMi Jinlong 2136bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2137bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 21384dc6ec00SJ. Bruce Fields /* 21394dc6ec00SJ. Bruce Fields * The following error isn't really legal. 21404dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 21414dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 21424dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 21434dc6ec00SJ. Bruce Fields * client. 21444dc6ec00SJ. Bruce Fields */ 2145bcecf1ccSMi Jinlong goto out; 2146bcecf1ccSMi Jinlong 2147bcecf1ccSMi Jinlong status = nfs_ok; 21482a4317c5SJeff Layton nfsd4_client_record_create(cstate->session->se_client); 2149bcecf1ccSMi Jinlong out: 21504dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2151bcecf1ccSMi Jinlong return status; 21524dc6ec00SJ. Bruce Fields } 21534dc6ec00SJ. Bruce Fields 21544dc6ec00SJ. Bruce Fields __be32 2155b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2156b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 21571da177e4SLinus Torvalds { 2158a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 21591da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 21601da177e4SLinus Torvalds unsigned int strhashval; 216128ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2162b37ad28bSAl Viro __be32 status; 2163a55370a3SNeilBrown char dname[HEXDIR_LEN]; 21641da177e4SLinus Torvalds 2165a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2166a55370a3SNeilBrown if (status) 216773aea4ecSNeil Brown return status; 2168a55370a3SNeilBrown 2169a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 21701da177e4SLinus Torvalds 217163db4632SJ. Bruce Fields /* Cases below refer to rfc 3530 section 14.2.33: */ 21721da177e4SLinus Torvalds nfs4_lock_state(); 2173e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 217428ce6054SNeilBrown if (conf) { 217563db4632SJ. Bruce Fields /* case 0: */ 21761da177e4SLinus Torvalds status = nfserr_clid_inuse; 2177e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2178e203d506SJ. Bruce Fields goto out; 2179026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2180363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2181363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2182363168b4SJeff Layton sizeof(addr_str)); 2183026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2184363168b4SJeff Layton "at %s\n", addr_str); 21851da177e4SLinus Torvalds goto out; 21861da177e4SLinus Torvalds } 21871da177e4SLinus Torvalds } 2188e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21891da177e4SLinus Torvalds if (unconf) 21901da177e4SLinus Torvalds expire_client(unconf); 21918f930711SJ. Bruce Fields status = nfserr_jukebox; 2192b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2193a55370a3SNeilBrown if (new == NULL) 21941da177e4SLinus Torvalds goto out; 219534b232bbSJ. Bruce Fields if (conf && same_verf(&conf->cl_verifier, &clverifier)) 219663db4632SJ. Bruce Fields /* case 1: probable callback update */ 21971da177e4SLinus Torvalds copy_clid(new, conf); 219834b232bbSJ. Bruce Fields else /* case 4 (new client) or cases 2, 3 (client reboot): */ 21991da177e4SLinus Torvalds gen_clid(new); 22008323c3b2SJ. Bruce Fields /* 22018323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 22028323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 22038323c3b2SJ. Bruce Fields */ 22048323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 22056f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2206c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 22071da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 22081da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 22091da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 22101da177e4SLinus Torvalds status = nfs_ok; 22111da177e4SLinus Torvalds out: 22121da177e4SLinus Torvalds nfs4_unlock_state(); 22131da177e4SLinus Torvalds return status; 22141da177e4SLinus Torvalds } 22151da177e4SLinus Torvalds 22161da177e4SLinus Torvalds 2217b37ad28bSAl Viro __be32 2218b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2219b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2220b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 22211da177e4SLinus Torvalds { 222221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 22231da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 22241da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2225b37ad28bSAl Viro __be32 status; 22261da177e4SLinus Torvalds 22271da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 22281da177e4SLinus Torvalds return nfserr_stale_clientid; 22291da177e4SLinus Torvalds nfs4_lock_state(); 223021ab45a4SNeilBrown 223121ab45a4SNeilBrown conf = find_confirmed_client(clid); 223221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 2233a186e767SJ. Bruce Fields /* 22348695b90aSJ. Bruce Fields * We try hard to give out unique clientid's, so if we get an 22358695b90aSJ. Bruce Fields * attempt to confirm the same clientid with a different cred, 22368695b90aSJ. Bruce Fields * there's a bug somewhere. Let's charitably assume it's our 22378695b90aSJ. Bruce Fields * bug. 2238a186e767SJ. Bruce Fields */ 22398695b90aSJ. Bruce Fields status = nfserr_serverfault; 22408695b90aSJ. Bruce Fields if (unconf && !same_creds(&unconf->cl_cred, &rqstp->rq_cred)) 22418695b90aSJ. Bruce Fields goto out; 22428695b90aSJ. Bruce Fields if (conf && !same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22438695b90aSJ. Bruce Fields goto out; 224463db4632SJ. Bruce Fields /* cases below refer to rfc 3530 section 14.2.34: */ 224590d700b7SJ. Bruce Fields if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) { 224690d700b7SJ. Bruce Fields if (conf && !unconf) /* case 2: probable retransmit */ 224790d700b7SJ. Bruce Fields status = nfs_ok; 224890d700b7SJ. Bruce Fields else /* case 4: client hasn't noticed we rebooted yet? */ 224990d700b7SJ. Bruce Fields status = nfserr_stale_clientid; 225090d700b7SJ. Bruce Fields goto out; 225190d700b7SJ. Bruce Fields } 225290d700b7SJ. Bruce Fields status = nfs_ok; 225390d700b7SJ. Bruce Fields if (conf) { /* case 1: callback update */ 22545a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22555a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22561a69c179SNeilBrown expire_client(unconf); 225790d700b7SJ. Bruce Fields } else { /* case 3: normal case; new or rebooted client */ 22588695b90aSJ. Bruce Fields unsigned int hash = clientstr_hashval(unconf->cl_recdir); 22591a69c179SNeilBrown 22608695b90aSJ. Bruce Fields conf = find_confirmed_client_by_str(unconf->cl_recdir, hash); 22611a69c179SNeilBrown if (conf) { 22622a4317c5SJeff Layton nfsd4_client_record_remove(conf); 22631a69c179SNeilBrown expire_client(conf); 22641a69c179SNeilBrown } 22651da177e4SLinus Torvalds move_to_confirmed(unconf); 2266f3d03b92SJ. Bruce Fields nfsd4_probe_callback(unconf); 226708e8987cSNeilBrown } 22681da177e4SLinus Torvalds out: 22691da177e4SLinus Torvalds nfs4_unlock_state(); 22701da177e4SLinus Torvalds return status; 22711da177e4SLinus Torvalds } 22721da177e4SLinus Torvalds 227332513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22741da177e4SLinus Torvalds { 227532513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 227632513b40SJ. Bruce Fields } 227732513b40SJ. Bruce Fields 227832513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 227932513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 228032513b40SJ. Bruce Fields { 22811da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22821da177e4SLinus Torvalds 22838b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 22841da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 22858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 22868beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 22871da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 228847f9940cSMeelap Shah fp->fi_had_conflict = false; 2289acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2290f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2291f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 229247cee541SPavel Emelyanov spin_lock(&recall_lock); 229347cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 229447cee541SPavel Emelyanov spin_unlock(&recall_lock); 22951da177e4SLinus Torvalds } 22961da177e4SLinus Torvalds 22971da177e4SLinus Torvalds static void 2298e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2299e60d4398SNeilBrown { 2300e60d4398SNeilBrown if (*slab == NULL) 2301e60d4398SNeilBrown return; 23021a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2303e60d4398SNeilBrown *slab = NULL; 2304e60d4398SNeilBrown } 2305e60d4398SNeilBrown 2306e8ff2a84SJ. Bruce Fields void 2307e60d4398SNeilBrown nfsd4_free_slabs(void) 2308e60d4398SNeilBrown { 2309fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2310fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2311e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23125ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23135b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2314e60d4398SNeilBrown } 23151da177e4SLinus Torvalds 231672083396SBryan Schumaker int 23171da177e4SLinus Torvalds nfsd4_init_slabs(void) 23181da177e4SLinus Torvalds { 2319fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2320fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2321fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2322fe0750e5SJ. Bruce Fields goto out_nomem; 2323fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2324fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2325fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2326e60d4398SNeilBrown goto out_nomem; 2327e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 232820c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2329e60d4398SNeilBrown if (file_slab == NULL) 2330e60d4398SNeilBrown goto out_nomem; 23315ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2332dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23335ac049acSNeilBrown if (stateid_slab == NULL) 23345ac049acSNeilBrown goto out_nomem; 23355b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 233620c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23375b2d21c1SNeilBrown if (deleg_slab == NULL) 23385b2d21c1SNeilBrown goto out_nomem; 2339e60d4398SNeilBrown return 0; 2340e60d4398SNeilBrown out_nomem: 2341e60d4398SNeilBrown nfsd4_free_slabs(); 23421da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23431da177e4SLinus Torvalds return -ENOMEM; 23441da177e4SLinus Torvalds } 23451da177e4SLinus Torvalds 2346fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23471da177e4SLinus Torvalds { 2348fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2349fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2350fe0750e5SJ. Bruce Fields } 2351fe0750e5SJ. Bruce Fields 2352fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2353fe0750e5SJ. Bruce Fields { 2354fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2355fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23561da177e4SLinus Torvalds } 23571da177e4SLinus Torvalds 2358ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2359ff194bd9SJ. Bruce Fields { 2360ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2361ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2362ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2363ff194bd9SJ. Bruce Fields } 2364ff194bd9SJ. Bruce Fields 2365fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23661da177e4SLinus Torvalds { 23671da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23681da177e4SLinus Torvalds 2369fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2370ff194bd9SJ. Bruce Fields if (!sop) 2371ff194bd9SJ. Bruce Fields return NULL; 2372ff194bd9SJ. Bruce Fields 2373ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2374ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2375fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2376ff194bd9SJ. Bruce Fields return NULL; 2377ff194bd9SJ. Bruce Fields } 23781da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2379ff194bd9SJ. Bruce Fields 2380ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2381ff194bd9SJ. Bruce Fields sop->so_client = clp; 2382ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23831da177e4SLinus Torvalds return sop; 23841da177e4SLinus Torvalds } 2385ff194bd9SJ. Bruce Fields 2386fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2387ff194bd9SJ. Bruce Fields { 238816bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2389fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 23901da177e4SLinus Torvalds } 23911da177e4SLinus Torvalds 2392fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23931da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2394fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 23951da177e4SLinus Torvalds 2396fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2397fe0750e5SJ. Bruce Fields if (!oo) 23981da177e4SLinus Torvalds return NULL; 2399fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2400fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2401d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2402fe0750e5SJ. Bruce Fields oo->oo_time = 0; 240338c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2404fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2405fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2406fe0750e5SJ. Bruce Fields return oo; 24071da177e4SLinus Torvalds } 24081da177e4SLinus Torvalds 2409996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2410fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2411d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24121da177e4SLinus Torvalds 2413996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2414ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2415fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24168beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2417fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 241813cd2184SNeilBrown get_nfs4_file(fp); 24191da177e4SLinus Torvalds stp->st_file = fp; 24201da177e4SLinus Torvalds stp->st_access_bmap = 0; 24211da177e4SLinus Torvalds stp->st_deny_bmap = 0; 242282c5ff1bSJeff Layton set_access(open->op_share_access, stp); 2423ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 24244c4cd222SNeilBrown stp->st_openstp = NULL; 24251da177e4SLinus Torvalds } 24261da177e4SLinus Torvalds 24271da177e4SLinus Torvalds static void 2428fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24291da177e4SLinus Torvalds { 2430fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24311da177e4SLinus Torvalds 2432fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2433fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24341da177e4SLinus Torvalds } 24351da177e4SLinus Torvalds 24361da177e4SLinus Torvalds static int 2437599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2438599e0a22SJ. Bruce Fields clientid_t *clid) 2439599e0a22SJ. Bruce Fields { 2440599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2441599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2442599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24431da177e4SLinus Torvalds } 24441da177e4SLinus Torvalds 2445fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24461da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24471da177e4SLinus Torvalds { 2448a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2449a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24501da177e4SLinus Torvalds 245116bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 245216bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 245316bfdaafSJ. Bruce Fields continue; 2454a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2455a50d2ad1SJ. Bruce Fields oo = openowner(so); 2456a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2457a50d2ad1SJ. Bruce Fields return oo; 2458a50d2ad1SJ. Bruce Fields } 24591da177e4SLinus Torvalds } 24601da177e4SLinus Torvalds return NULL; 24611da177e4SLinus Torvalds } 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24641da177e4SLinus Torvalds static struct nfs4_file * 24651da177e4SLinus Torvalds find_file(struct inode *ino) 24661da177e4SLinus Torvalds { 24671da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24681da177e4SLinus Torvalds struct nfs4_file *fp; 24691da177e4SLinus Torvalds 24708b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24711da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 247213cd2184SNeilBrown if (fp->fi_inode == ino) { 247313cd2184SNeilBrown get_nfs4_file(fp); 24748b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24751da177e4SLinus Torvalds return fp; 24761da177e4SLinus Torvalds } 247713cd2184SNeilBrown } 24788b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24791da177e4SLinus Torvalds return NULL; 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 24824f83aa30SJ. Bruce Fields /* 24831da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 24841da177e4SLinus Torvalds * WRITE with all zero or all one stateid 24851da177e4SLinus Torvalds */ 2486b37ad28bSAl Viro static __be32 24871da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 24881da177e4SLinus Torvalds { 24891da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24901da177e4SLinus Torvalds struct nfs4_file *fp; 2491dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2492b37ad28bSAl Viro __be32 ret; 24931da177e4SLinus Torvalds 24941da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds fp = find_file(ino); 249713cd2184SNeilBrown if (!fp) 249813cd2184SNeilBrown return nfs_ok; 2499b700949bSNeilBrown ret = nfserr_locked; 25001da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25018beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 2502ce0fc43cSJeff Layton if (test_deny(deny_type, stp) || 2503ce0fc43cSJeff Layton test_deny(NFS4_SHARE_DENY_BOTH, stp)) 250413cd2184SNeilBrown goto out; 25051da177e4SLinus Torvalds } 250613cd2184SNeilBrown ret = nfs_ok; 250713cd2184SNeilBrown out: 250813cd2184SNeilBrown put_nfs4_file(fp); 250913cd2184SNeilBrown return ret; 25101da177e4SLinus Torvalds } 25111da177e4SLinus Torvalds 25126b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25131da177e4SLinus Torvalds { 25141da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25151da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25161da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25171da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25181da177e4SLinus Torvalds * it's safe to take a reference: */ 25191da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25201da177e4SLinus Torvalds 25211da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25221da177e4SLinus Torvalds 2523460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25241da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25251da177e4SLinus Torvalds 25266b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25276b57d9c8SJ. Bruce Fields } 25286b57d9c8SJ. Bruce Fields 2529acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25306b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25316b57d9c8SJ. Bruce Fields { 2532acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2533acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25346b57d9c8SJ. Bruce Fields 2535acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2536acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2537acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25380272e1fdSJ. Bruce Fields /* 25390272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2540acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25416b57d9c8SJ. Bruce Fields * in time: 25420272e1fdSJ. Bruce Fields */ 25430272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25441da177e4SLinus Torvalds 25455d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2546acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2547acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25485d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25495d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25501da177e4SLinus Torvalds } 25511da177e4SLinus Torvalds 25521da177e4SLinus Torvalds static 25531da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25541da177e4SLinus Torvalds { 25551da177e4SLinus Torvalds if (arg & F_UNLCK) 25561da177e4SLinus Torvalds return lease_modify(onlist, arg); 25571da177e4SLinus Torvalds else 25581da177e4SLinus Torvalds return -EAGAIN; 25591da177e4SLinus Torvalds } 25601da177e4SLinus Torvalds 25617b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25628fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25638fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25641da177e4SLinus Torvalds }; 25651da177e4SLinus Torvalds 25667a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25677a8711c9SJ. Bruce Fields { 25687a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25697a8711c9SJ. Bruce Fields return nfs_ok; 25707a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25717a8711c9SJ. Bruce Fields return nfserr_replay_me; 25727a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25737a8711c9SJ. Bruce Fields return nfs_ok; 25747a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25757a8711c9SJ. Bruce Fields } 25761da177e4SLinus Torvalds 2577b37ad28bSAl Viro __be32 25786668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25796668958fSAndy Adamson struct nfsd4_open *open) 25801da177e4SLinus Torvalds { 25811da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25821da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25831da177e4SLinus Torvalds unsigned int strhashval; 2584fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 25854cdc951bSJ. Bruce Fields __be32 status; 25861da177e4SLinus Torvalds 25871da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 25881da177e4SLinus Torvalds return nfserr_stale_clientid; 258932513b40SJ. Bruce Fields /* 259032513b40SJ. Bruce Fields * In case we need it later, after we've already created the 259132513b40SJ. Bruce Fields * file and don't want to risk a further failure: 259232513b40SJ. Bruce Fields */ 259332513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 259432513b40SJ. Bruce Fields if (open->op_file == NULL) 259532513b40SJ. Bruce Fields return nfserr_jukebox; 25961da177e4SLinus Torvalds 259716bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2598fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2599fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2600fe0750e5SJ. Bruce Fields if (!oo) { 26010f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26020f442aa2SJ. Bruce Fields if (clp == NULL) 26030f442aa2SJ. Bruce Fields return nfserr_expired; 2604bcf130f9SJ. Bruce Fields goto new_owner; 26050f442aa2SJ. Bruce Fields } 2606dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26070f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2608fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2609fe0750e5SJ. Bruce Fields release_openowner(oo); 2610fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2611bcf130f9SJ. Bruce Fields goto new_owner; 26120f442aa2SJ. Bruce Fields } 26134cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26144cdc951bSJ. Bruce Fields if (status) 26154cdc951bSJ. Bruce Fields return status; 26164cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26174cdc951bSJ. Bruce Fields goto alloc_stateid; 2618bcf130f9SJ. Bruce Fields new_owner: 2619fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2620fe0750e5SJ. Bruce Fields if (oo == NULL) 26213e772463SJ. Bruce Fields return nfserr_jukebox; 2622fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26234cdc951bSJ. Bruce Fields alloc_stateid: 26244cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26254cdc951bSJ. Bruce Fields if (!open->op_stp) 26264cdc951bSJ. Bruce Fields return nfserr_jukebox; 26270f442aa2SJ. Bruce Fields return nfs_ok; 26281da177e4SLinus Torvalds } 26291da177e4SLinus Torvalds 2630b37ad28bSAl Viro static inline __be32 26314a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26324a6e43e6SNeilBrown { 26334a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26344a6e43e6SNeilBrown return nfserr_openmode; 26354a6e43e6SNeilBrown else 26364a6e43e6SNeilBrown return nfs_ok; 26374a6e43e6SNeilBrown } 26384a6e43e6SNeilBrown 2639c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 264024a0111eSJ. Bruce Fields { 264124a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 264224a0111eSJ. Bruce Fields } 264324a0111eSJ. Bruce Fields 264438c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2645f459e453SJ. Bruce Fields { 2646f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2647f459e453SJ. Bruce Fields 264838c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2649f459e453SJ. Bruce Fields if (!ret) 2650f459e453SJ. Bruce Fields return NULL; 2651f459e453SJ. Bruce Fields return delegstateid(ret); 2652f459e453SJ. Bruce Fields } 2653f459e453SJ. Bruce Fields 26548b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26558b289b2cSJ. Bruce Fields { 26568b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26578b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26588b289b2cSJ. Bruce Fields } 26598b289b2cSJ. Bruce Fields 2660b37ad28bSAl Viro static __be32 266138c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2662567d9829SNeilBrown struct nfs4_delegation **dp) 2663567d9829SNeilBrown { 2664567d9829SNeilBrown int flags; 2665b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2666567d9829SNeilBrown 266738c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2668567d9829SNeilBrown if (*dp == NULL) 2669c44c5eebSNeilBrown goto out; 267024a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2671567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2672567d9829SNeilBrown if (status) 2673567d9829SNeilBrown *dp = NULL; 2674c44c5eebSNeilBrown out: 26758b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2676c44c5eebSNeilBrown return nfs_ok; 2677c44c5eebSNeilBrown if (status) 2678c44c5eebSNeilBrown return status; 2679dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2680c44c5eebSNeilBrown return nfs_ok; 2681567d9829SNeilBrown } 2682567d9829SNeilBrown 2683b37ad28bSAl Viro static __be32 2684dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26851da177e4SLinus Torvalds { 2686dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2687fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26881da177e4SLinus Torvalds 26898beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26901da177e4SLinus Torvalds /* ignore lock owners */ 26911da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26921da177e4SLinus Torvalds continue; 26931da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2694fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 26951da177e4SLinus Torvalds *stpp = local; 26961da177e4SLinus Torvalds /* check for conflicting share reservations */ 26971da177e4SLinus Torvalds if (!test_share(local, open)) 269877eaae8dSJ. Bruce Fields return nfserr_share_denied; 26991da177e4SLinus Torvalds } 270077eaae8dSJ. Bruce Fields return nfs_ok; 27011da177e4SLinus Torvalds } 27021da177e4SLinus Torvalds 2703996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2704996e0938SJ. Bruce Fields { 2705996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27065ac049acSNeilBrown } 27075ac049acSNeilBrown 270821fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 270921fb4016SJ. Bruce Fields { 271021fb4016SJ. Bruce Fields int flags = 0; 271121fb4016SJ. Bruce Fields 271221fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 271321fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 271421fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 271521fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 271621fb4016SJ. Bruce Fields return flags; 271721fb4016SJ. Bruce Fields } 271821fb4016SJ. Bruce Fields 27190c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27200c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2721f9d7562fSJ. Bruce Fields { 2722f9d7562fSJ. Bruce Fields __be32 status; 27230c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27240c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27250c12eaffSCasey Bodley 2726f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2727f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2728f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2729f9d7562fSJ. Bruce Fields if (status) 2730f9d7562fSJ. Bruce Fields return status; 2731f9d7562fSJ. Bruce Fields } 2732f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2733f9d7562fSJ. Bruce Fields 2734f9d7562fSJ. Bruce Fields return nfs_ok; 2735f9d7562fSJ. Bruce Fields } 2736f9d7562fSJ. Bruce Fields 2737b37ad28bSAl Viro static inline __be32 27381da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27391da177e4SLinus Torvalds struct nfsd4_open *open) 27401da177e4SLinus Torvalds { 27411da177e4SLinus Torvalds struct iattr iattr = { 27421da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27431da177e4SLinus Torvalds .ia_size = 0, 27441da177e4SLinus Torvalds }; 27451da177e4SLinus Torvalds if (!open->op_truncate) 27461da177e4SLinus Torvalds return 0; 27471da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27489246585aSAl Viro return nfserr_inval; 27491da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27501da177e4SLinus Torvalds } 27511da177e4SLinus Torvalds 2752b37ad28bSAl Viro static __be32 2753dcef0413SJ. 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) 27541da177e4SLinus Torvalds { 2755b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27567d947842SJ. Bruce Fields bool new_access; 2757b37ad28bSAl Viro __be32 status; 27581da177e4SLinus Torvalds 275982c5ff1bSJeff Layton new_access = !test_access(op_share_access, stp); 2760f9d7562fSJ. Bruce Fields if (new_access) { 27610c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2762f9d7562fSJ. Bruce Fields if (status) 2763f9d7562fSJ. Bruce Fields return status; 27646c26d08fSJ. Bruce Fields } 27651da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27661da177e4SLinus Torvalds if (status) { 2767f9d7562fSJ. Bruce Fields if (new_access) { 2768f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2769f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2770f9d7562fSJ. Bruce Fields } 27711da177e4SLinus Torvalds return status; 27721da177e4SLinus Torvalds } 27731da177e4SLinus Torvalds /* remember the open */ 277482c5ff1bSJeff Layton set_access(op_share_access, stp); 2775ce0fc43cSJeff Layton set_deny(open->op_share_deny, stp); 27761da177e4SLinus Torvalds 27771da177e4SLinus Torvalds return nfs_ok; 27781da177e4SLinus Torvalds } 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds 27811da177e4SLinus Torvalds static void 27821255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 27831da177e4SLinus Torvalds { 2784dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 27851da177e4SLinus Torvalds } 27861da177e4SLinus Torvalds 278714a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 278814a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 278914a24e99SJ. Bruce Fields { 279014a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 279114a24e99SJ. Bruce Fields return true; 279214a24e99SJ. Bruce Fields /* 279314a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 279414a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 279514a24e99SJ. Bruce Fields * until we hear otherwise: 279614a24e99SJ. Bruce Fields */ 279714a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 279814a24e99SJ. Bruce Fields } 279914a24e99SJ. Bruce Fields 280022d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 280122d38c4cSJ. Bruce Fields { 280222d38c4cSJ. Bruce Fields struct file_lock *fl; 280322d38c4cSJ. Bruce Fields 280422d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 280522d38c4cSJ. Bruce Fields if (!fl) 280622d38c4cSJ. Bruce Fields return NULL; 280722d38c4cSJ. Bruce Fields locks_init_lock(fl); 280822d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 280922d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 281022d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 281122d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2812acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 281322d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 281422d38c4cSJ. Bruce Fields return fl; 281522d38c4cSJ. Bruce Fields } 281622d38c4cSJ. Bruce Fields 2817edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2818edab9782SJ. Bruce Fields { 2819acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2820edab9782SJ. Bruce Fields struct file_lock *fl; 2821edab9782SJ. Bruce Fields int status; 2822edab9782SJ. Bruce Fields 2823edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2824edab9782SJ. Bruce Fields if (!fl) 2825edab9782SJ. Bruce Fields return -ENOMEM; 2826acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28272a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2828acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2829edab9782SJ. Bruce Fields if (status) { 2830acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2831edab9782SJ. Bruce Fields locks_free_lock(fl); 2832edab9782SJ. Bruce Fields return -ENOMEM; 2833edab9782SJ. Bruce Fields } 2834acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2835acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2836acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2837acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2838acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2839acfdf5c3SJ. Bruce Fields return 0; 2840acfdf5c3SJ. Bruce Fields } 2841acfdf5c3SJ. Bruce Fields 2842acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2843acfdf5c3SJ. Bruce Fields { 2844acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2845acfdf5c3SJ. Bruce Fields 2846acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2847acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2848acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2849acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2850acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2851acfdf5c3SJ. Bruce Fields return -EAGAIN; 2852acfdf5c3SJ. Bruce Fields } 2853acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2854acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2855acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28562a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2857edab9782SJ. Bruce Fields return 0; 2858edab9782SJ. Bruce Fields } 2859edab9782SJ. Bruce Fields 28604aa8913cSBenny Halevy static void nfsd4_open_deleg_none_ext(struct nfsd4_open *open, int status) 28614aa8913cSBenny Halevy { 28624aa8913cSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 28634aa8913cSBenny Halevy if (status == -EAGAIN) 28644aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 28654aa8913cSBenny Halevy else { 28664aa8913cSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 28674aa8913cSBenny Halevy switch (open->op_deleg_want) { 28684aa8913cSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 28694aa8913cSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 28704aa8913cSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 28714aa8913cSBenny Halevy break; 28724aa8913cSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 28734aa8913cSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 28744aa8913cSBenny Halevy break; 28754aa8913cSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 28764aa8913cSBenny Halevy BUG(); /* not supposed to get here */ 28774aa8913cSBenny Halevy } 28784aa8913cSBenny Halevy } 28794aa8913cSBenny Halevy } 28804aa8913cSBenny Halevy 28811da177e4SLinus Torvalds /* 28821da177e4SLinus Torvalds * Attempt to hand out a delegation. 28831da177e4SLinus Torvalds */ 28841da177e4SLinus Torvalds static void 2885dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28861da177e4SLinus Torvalds { 28871da177e4SLinus Torvalds struct nfs4_delegation *dp; 2888fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 288914a24e99SJ. Bruce Fields int cb_up; 2890d24433cdSBenny Halevy int status = 0, flag = 0; 28911da177e4SLinus Torvalds 2892fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28931da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28947b190fecSNeilBrown open->op_recall = 0; 28957b190fecSNeilBrown switch (open->op_claim_type) { 28967b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28972bf23875SJ. Bruce Fields if (!cb_up) 28987b190fecSNeilBrown open->op_recall = 1; 28997b190fecSNeilBrown flag = open->op_delegate_type; 29007b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 29011da177e4SLinus Torvalds goto out; 29027b190fecSNeilBrown break; 29037b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 29047b190fecSNeilBrown /* Let's not give out any delegations till everyone's 29057b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2906af558e33SJ. Bruce Fields if (locks_in_grace()) 29077b190fecSNeilBrown goto out; 2908dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 29097b190fecSNeilBrown goto out; 29101da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 29111da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 29121da177e4SLinus Torvalds else 29131da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 29147b190fecSNeilBrown break; 29157b190fecSNeilBrown default: 29167b190fecSNeilBrown goto out; 29177b190fecSNeilBrown } 29181da177e4SLinus Torvalds 2919fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2920dd239cc0SJ. Bruce Fields if (dp == NULL) 2921dd239cc0SJ. Bruce Fields goto out_no_deleg; 2922acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2923edab9782SJ. Bruce Fields if (status) 2924dd239cc0SJ. Bruce Fields goto out_free; 29251da177e4SLinus Torvalds 2926d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29271da177e4SLinus Torvalds 29288c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2929d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29301da177e4SLinus Torvalds out: 29311da177e4SLinus Torvalds open->op_delegate_type = flag; 2932d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2933d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2934d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2935d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2936d24433cdSBenny Halevy 29374aa8913cSBenny Halevy /* 4.1 client asking for a delegation? */ 29384aa8913cSBenny Halevy if (open->op_deleg_want) 29394aa8913cSBenny Halevy nfsd4_open_deleg_none_ext(open, status); 2940d24433cdSBenny Halevy } 2941dd239cc0SJ. Bruce Fields return; 2942dd239cc0SJ. Bruce Fields out_free: 2943acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2944dd239cc0SJ. Bruce Fields out_no_deleg: 2945dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2946dd239cc0SJ. Bruce Fields goto out; 29471da177e4SLinus Torvalds } 29481da177e4SLinus Torvalds 2949e27f49c3SBenny Halevy static void nfsd4_deleg_xgrade_none_ext(struct nfsd4_open *open, 2950e27f49c3SBenny Halevy struct nfs4_delegation *dp) 2951e27f49c3SBenny Halevy { 2952e27f49c3SBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 2953e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2954e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2955e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 2956e27f49c3SBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 2957e27f49c3SBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 2958e27f49c3SBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2959e27f49c3SBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 2960e27f49c3SBenny Halevy } 2961e27f49c3SBenny Halevy /* Otherwise the client must be confused wanting a delegation 2962e27f49c3SBenny Halevy * it already has, therefore we don't return 2963e27f49c3SBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 2964e27f49c3SBenny Halevy */ 2965e27f49c3SBenny Halevy } 2966e27f49c3SBenny Halevy 29671da177e4SLinus Torvalds /* 29681da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29691da177e4SLinus Torvalds */ 2970b37ad28bSAl Viro __be32 29711da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29721da177e4SLinus Torvalds { 29736668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 297438c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29751da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29761da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2977dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2978567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2979b37ad28bSAl Viro __be32 status; 29801da177e4SLinus Torvalds 29811da177e4SLinus Torvalds /* 29821da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29831da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29841da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29851da177e4SLinus Torvalds */ 29861da177e4SLinus Torvalds fp = find_file(ino); 29871da177e4SLinus Torvalds if (fp) { 29881da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29891da177e4SLinus Torvalds goto out; 299038c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2991c44c5eebSNeilBrown if (status) 2992c44c5eebSNeilBrown goto out; 29931da177e4SLinus Torvalds } else { 2994c44c5eebSNeilBrown status = nfserr_bad_stateid; 29958b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 2996c44c5eebSNeilBrown goto out; 29973e772463SJ. Bruce Fields status = nfserr_jukebox; 299832513b40SJ. Bruce Fields fp = open->op_file; 299932513b40SJ. Bruce Fields open->op_file = NULL; 300032513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 30011da177e4SLinus Torvalds } 30021da177e4SLinus Torvalds 30031da177e4SLinus Torvalds /* 30041da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 30051da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 30061da177e4SLinus Torvalds */ 30071da177e4SLinus Torvalds if (stp) { 30081da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 3009f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 30101da177e4SLinus Torvalds if (status) 30111da177e4SLinus Torvalds goto out; 30121da177e4SLinus Torvalds } else { 30134cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 3014567d9829SNeilBrown if (status) 30151da177e4SLinus Torvalds goto out; 30164af82504SJ. Bruce Fields status = nfsd4_truncate(rqstp, current_fh, open); 30174af82504SJ. Bruce Fields if (status) 30184af82504SJ. Bruce Fields goto out; 30194cdc951bSJ. Bruce Fields stp = open->op_stp; 30204cdc951bSJ. Bruce Fields open->op_stp = NULL; 3021996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30221da177e4SLinus Torvalds } 3023dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3024dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30251da177e4SLinus Torvalds 3026d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3027dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30286668958fSAndy Adamson 3029d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3030d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3031d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3032d24433cdSBenny Halevy goto nodeleg; 3033d24433cdSBenny Halevy } 3034d24433cdSBenny Halevy } 3035d24433cdSBenny Halevy 30361da177e4SLinus Torvalds /* 30371da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30381da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30391da177e4SLinus Torvalds */ 30401da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3041d24433cdSBenny Halevy nodeleg: 30421da177e4SLinus Torvalds status = nfs_ok; 30431da177e4SLinus Torvalds 30448c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3045dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30461da177e4SLinus Torvalds out: 3047d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3048d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3049e27f49c3SBenny Halevy open->op_deleg_want) 3050e27f49c3SBenny Halevy nfsd4_deleg_xgrade_none_ext(open, dp); 3051d24433cdSBenny Halevy 305213cd2184SNeilBrown if (fp) 305313cd2184SNeilBrown put_nfs4_file(fp); 305437515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30551255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30561da177e4SLinus Torvalds /* 30571da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30581da177e4SLinus Torvalds */ 30591da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3060dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30616668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30621da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30631da177e4SLinus Torvalds 30641da177e4SLinus Torvalds return status; 30651da177e4SLinus Torvalds } 30661da177e4SLinus Torvalds 3067d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3068d29b20cdSJ. Bruce Fields { 3069d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3070d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3071d29b20cdSJ. Bruce Fields 3072d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3073d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3074d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3075d29b20cdSJ. Bruce Fields if (status) { 3076d29b20cdSJ. Bruce Fields release_openowner(oo); 3077d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3078d29b20cdSJ. Bruce Fields } else 3079d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3080d29b20cdSJ. Bruce Fields } 3081d29b20cdSJ. Bruce Fields } 308232513b40SJ. Bruce Fields if (open->op_file) 308332513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30844cdc951bSJ. Bruce Fields if (open->op_stp) 30854cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3086d29b20cdSJ. Bruce Fields } 3087d29b20cdSJ. Bruce Fields 3088b37ad28bSAl Viro __be32 3089b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3090b591480bSJ.Bruce Fields clientid_t *clid) 30911da177e4SLinus Torvalds { 30921da177e4SLinus Torvalds struct nfs4_client *clp; 3093b37ad28bSAl Viro __be32 status; 30941da177e4SLinus Torvalds 30951da177e4SLinus Torvalds nfs4_lock_state(); 30961da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 30971da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30981da177e4SLinus Torvalds status = nfserr_stale_clientid; 30991da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 31001da177e4SLinus Torvalds goto out; 31011da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31021da177e4SLinus Torvalds status = nfserr_expired; 31031da177e4SLinus Torvalds if (clp == NULL) { 31041da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31051da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31061da177e4SLinus Torvalds goto out; 31071da177e4SLinus Torvalds } 31081da177e4SLinus Torvalds status = nfserr_cb_path_down; 3109ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 311077a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31111da177e4SLinus Torvalds goto out; 31121da177e4SLinus Torvalds status = nfs_ok; 31131da177e4SLinus Torvalds out: 31141da177e4SLinus Torvalds nfs4_unlock_state(); 31151da177e4SLinus Torvalds return status; 31161da177e4SLinus Torvalds } 31171da177e4SLinus Torvalds 3118c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3119af558e33SJ. Bruce Fields }; 3120af558e33SJ. Bruce Fields 312133dcc481SJeff Layton static bool grace_ended; 312233dcc481SJeff Layton 3123a76b4319SNeilBrown static void 3124af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3125a76b4319SNeilBrown { 312633dcc481SJeff Layton /* do nothing if grace period already ended */ 312733dcc481SJeff Layton if (grace_ended) 312833dcc481SJeff Layton return; 312933dcc481SJeff Layton 3130a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 313133dcc481SJeff Layton grace_ended = true; 31322a4317c5SJeff Layton nfsd4_record_grace_done(&init_net, boot_time); 3133af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3134e46b498cSJ. Bruce Fields /* 3135e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3136e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3137e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3138e46b498cSJ. Bruce Fields */ 3139e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3140a76b4319SNeilBrown } 3141a76b4319SNeilBrown 3142fd39ca9aSNeilBrown static time_t 31431da177e4SLinus Torvalds nfs4_laundromat(void) 31441da177e4SLinus Torvalds { 31451da177e4SLinus Torvalds struct nfs4_client *clp; 3146fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31471da177e4SLinus Torvalds struct nfs4_delegation *dp; 31481da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3149cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3150cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3151cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31521da177e4SLinus Torvalds 31531da177e4SLinus Torvalds nfs4_lock_state(); 31541da177e4SLinus Torvalds 31551da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3156af558e33SJ. Bruce Fields nfsd4_end_grace(); 315736acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 315836acb66bSBenny Halevy spin_lock(&client_lock); 31591da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31601da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31611da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31621da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31631da177e4SLinus Torvalds if (clientid_val > t) 31641da177e4SLinus Torvalds clientid_val = t; 31651da177e4SLinus Torvalds break; 31661da177e4SLinus Torvalds } 3167d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3168d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3169d7682988SBenny Halevy clp->cl_clientid.cl_id); 3170d7682988SBenny Halevy continue; 3171d7682988SBenny Halevy } 3172d7682988SBenny Halevy unhash_client_locked(clp); 3173d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 317436acb66bSBenny Halevy } 317536acb66bSBenny Halevy spin_unlock(&client_lock); 317636acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 317736acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31781da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31791da177e4SLinus Torvalds clp->cl_clientid.cl_id); 31802a4317c5SJeff Layton nfsd4_client_record_remove(clp); 31811da177e4SLinus Torvalds expire_client(clp); 31821da177e4SLinus Torvalds } 31831da177e4SLinus Torvalds spin_lock(&recall_lock); 31841da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31851da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31861da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31871da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31881da177e4SLinus Torvalds if (test_val > u) 31891da177e4SLinus Torvalds test_val = u; 31901da177e4SLinus Torvalds break; 31911da177e4SLinus Torvalds } 31921da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31931da177e4SLinus Torvalds } 31941da177e4SLinus Torvalds spin_unlock(&recall_lock); 31951da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 31961da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31971da177e4SLinus Torvalds unhash_delegation(dp); 31981da177e4SLinus Torvalds } 3199cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 32001da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3201fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3202fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3203fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 32041da177e4SLinus Torvalds if (test_val > u) 32051da177e4SLinus Torvalds test_val = u; 32061da177e4SLinus Torvalds break; 32071da177e4SLinus Torvalds } 3208fe0750e5SJ. Bruce Fields release_openowner(oo); 32091da177e4SLinus Torvalds } 32101da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32111da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32121da177e4SLinus Torvalds nfs4_unlock_state(); 32131da177e4SLinus Torvalds return clientid_val; 32141da177e4SLinus Torvalds } 32151da177e4SLinus Torvalds 3216a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3217a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3218a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3219a254b246SHarvey Harrison 3220a254b246SHarvey Harrison static void 3221c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32221da177e4SLinus Torvalds { 32231da177e4SLinus Torvalds time_t t; 32241da177e4SLinus Torvalds 32251da177e4SLinus Torvalds t = nfs4_laundromat(); 32261da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 322758da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds 3230f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3231f8816512SNeilBrown { 3232f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3233f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3234f7a4d872SJ. Bruce Fields return nfs_ok; 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds 32371da177e4SLinus Torvalds static int 32381da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32391da177e4SLinus Torvalds { 3240d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3241e4e83ea4SJ. Bruce Fields return 0; 32428c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32438c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32441da177e4SLinus Torvalds return 1; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds 32471da177e4SLinus Torvalds static inline int 324882c5ff1bSJeff Layton access_permit_read(struct nfs4_ol_stateid *stp) 32491da177e4SLinus Torvalds { 325082c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_READ, stp) || 325182c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp) || 325282c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_WRITE, stp); 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds 32551da177e4SLinus Torvalds static inline int 325682c5ff1bSJeff Layton access_permit_write(struct nfs4_ol_stateid *stp) 32571da177e4SLinus Torvalds { 325882c5ff1bSJeff Layton return test_access(NFS4_SHARE_ACCESS_WRITE, stp) || 325982c5ff1bSJeff Layton test_access(NFS4_SHARE_ACCESS_BOTH, stp); 32601da177e4SLinus Torvalds } 32611da177e4SLinus Torvalds 32621da177e4SLinus Torvalds static 3263dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32641da177e4SLinus Torvalds { 3265b37ad28bSAl Viro __be32 status = nfserr_openmode; 32661da177e4SLinus Torvalds 326702921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 326802921914SJ. Bruce Fields if (stp->st_openstp) 326902921914SJ. Bruce Fields stp = stp->st_openstp; 327082c5ff1bSJeff Layton if ((flags & WR_STATE) && !access_permit_write(stp)) 32711da177e4SLinus Torvalds goto out; 327282c5ff1bSJeff Layton if ((flags & RD_STATE) && !access_permit_read(stp)) 32731da177e4SLinus Torvalds goto out; 32741da177e4SLinus Torvalds status = nfs_ok; 32751da177e4SLinus Torvalds out: 32761da177e4SLinus Torvalds return status; 32771da177e4SLinus Torvalds } 32781da177e4SLinus Torvalds 3279b37ad28bSAl Viro static inline __be32 32801da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 32811da177e4SLinus Torvalds { 3282203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32831da177e4SLinus Torvalds return nfs_ok; 3284af558e33SJ. Bruce Fields else if (locks_in_grace()) { 328525985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32861da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32871da177e4SLinus Torvalds return nfserr_grace; 32881da177e4SLinus Torvalds } else if (flags & WR_STATE) 32891da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32901da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32911da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32921da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32931da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32941da177e4SLinus Torvalds } 32951da177e4SLinus Torvalds 32961da177e4SLinus Torvalds /* 32971da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 32981da177e4SLinus Torvalds * that are not able to provide mandatory locking. 32991da177e4SLinus Torvalds */ 33001da177e4SLinus Torvalds static inline int 330118f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 33021da177e4SLinus Torvalds { 3303203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 33041da177e4SLinus Torvalds } 33051da177e4SLinus Torvalds 330681b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 330781b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 330881b82965SJ. Bruce Fields { 330981b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 331081b82965SJ. Bruce Fields } 331181b82965SJ. Bruce Fields 331257b7b43bSJ. Bruce Fields static __be32 check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33130836f587SJ. Bruce Fields { 33146668958fSAndy Adamson /* 33156668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33166668958fSAndy Adamson * when it is zero. 33176668958fSAndy Adamson */ 331828dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 331981b82965SJ. Bruce Fields return nfs_ok; 332081b82965SJ. Bruce Fields 332181b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 332281b82965SJ. Bruce Fields return nfs_ok; 33236668958fSAndy Adamson 33240836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 332581b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33260836f587SJ. Bruce Fields return nfserr_bad_stateid; 33270836f587SJ. Bruce Fields /* 332881b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 332981b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 333081b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 333181b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 333281b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 333381b82965SJ. Bruce Fields * but better performance may result in retrying IO that 333481b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 333581b82965SJ. Bruce Fields * reordered in flight: 33360836f587SJ. Bruce Fields */ 33370836f587SJ. Bruce Fields return nfserr_old_stateid; 33380836f587SJ. Bruce Fields } 33390836f587SJ. Bruce Fields 33407df302f7SChuck Lever static __be32 nfsd4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 334117456804SBryan Schumaker { 334297b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 334397b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 334497b7e3b6SJ. Bruce Fields __be32 status; 334517456804SBryan Schumaker 33467df302f7SChuck Lever if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33477df302f7SChuck Lever return nfserr_bad_stateid; 33487df302f7SChuck Lever /* Client debugging aid. */ 33497df302f7SChuck Lever if (!same_clid(&stateid->si_opaque.so_clid, &cl->cl_clientid)) { 33507df302f7SChuck Lever char addr_str[INET6_ADDRSTRLEN]; 33517df302f7SChuck Lever rpc_ntop((struct sockaddr *)&cl->cl_addr, addr_str, 33527df302f7SChuck Lever sizeof(addr_str)); 33537df302f7SChuck Lever pr_warn_ratelimited("NFSD: client %s testing state ID " 33547df302f7SChuck Lever "with incorrect client ID\n", addr_str); 33557df302f7SChuck Lever return nfserr_bad_stateid; 33567df302f7SChuck Lever } 335738c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 335897b7e3b6SJ. Bruce Fields if (!s) 33597df302f7SChuck Lever return nfserr_bad_stateid; 336036279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 336117456804SBryan Schumaker if (status) 336217456804SBryan Schumaker return status; 336397b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 336497b7e3b6SJ. Bruce Fields return nfs_ok; 336597b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 336697b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3367dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 336897b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 336997b7e3b6SJ. Bruce Fields return nfs_ok; 337017456804SBryan Schumaker } 337117456804SBryan Schumaker 337238c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 337338c2f4b1SJ. Bruce Fields { 337438c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 337538c2f4b1SJ. Bruce Fields 337638c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 337738c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 337838c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 337938c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 338038c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 338138c2f4b1SJ. Bruce Fields if (!cl) 338238c2f4b1SJ. Bruce Fields return nfserr_expired; 338338c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 338438c2f4b1SJ. Bruce Fields if (!*s) 338538c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 338638c2f4b1SJ. Bruce Fields return nfs_ok; 338738c2f4b1SJ. Bruce Fields 338838c2f4b1SJ. Bruce Fields } 338938c2f4b1SJ. Bruce Fields 33901da177e4SLinus Torvalds /* 33911da177e4SLinus Torvalds * Checks for stateid operations 33921da177e4SLinus Torvalds */ 3393b37ad28bSAl Viro __be32 3394dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3395dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 33961da177e4SLinus Torvalds { 339769064a27SJ. Bruce Fields struct nfs4_stid *s; 3398dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 33991da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3400dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 34011da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3402b37ad28bSAl Viro __be32 status; 34031da177e4SLinus Torvalds 34041da177e4SLinus Torvalds if (filpp) 34051da177e4SLinus Torvalds *filpp = NULL; 34061da177e4SLinus Torvalds 340718f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 34081da177e4SLinus Torvalds return nfserr_grace; 34091da177e4SLinus Torvalds 34101da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 34111da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 34121da177e4SLinus Torvalds 341338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 341438c2f4b1SJ. Bruce Fields if (status) 341538c2f4b1SJ. Bruce Fields return status; 341669064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34170c2a498fSJ. Bruce Fields if (status) 34180c2a498fSJ. Bruce Fields goto out; 3419f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3420f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 342169064a27SJ. Bruce Fields dp = delegstateid(s); 3422dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3423dc9bf700SJ. Bruce Fields if (status) 3424dc9bf700SJ. Bruce Fields goto out; 342543b0178eSDan Carpenter if (filpp) { 3426acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3427f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 342843b0178eSDan Carpenter } 3429f7a4d872SJ. Bruce Fields break; 3430f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3431f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 343269064a27SJ. Bruce Fields stp = openlockstateid(s); 3433f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3434f7a4d872SJ. Bruce Fields if (status) 34351da177e4SLinus Torvalds goto out; 3436fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3437dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34381da177e4SLinus Torvalds goto out; 3439a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3440a4455be0SJ. Bruce Fields if (status) 34411da177e4SLinus Torvalds goto out; 3442f9d7562fSJ. Bruce Fields if (filpp) { 3443f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3444f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3445f9d7562fSJ. Bruce Fields else 3446f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3447f9d7562fSJ. Bruce Fields } 3448f7a4d872SJ. Bruce Fields break; 3449f7a4d872SJ. Bruce Fields default: 3450f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34511da177e4SLinus Torvalds } 34521da177e4SLinus Torvalds status = nfs_ok; 34531da177e4SLinus Torvalds out: 34541da177e4SLinus Torvalds return status; 34551da177e4SLinus Torvalds } 34561da177e4SLinus Torvalds 3457e1ca12dfSBryan Schumaker static __be32 3458dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3459e1ca12dfSBryan Schumaker { 3460fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3461e1ca12dfSBryan Schumaker return nfserr_locks_held; 3462e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3463e1ca12dfSBryan Schumaker return nfs_ok; 3464e1ca12dfSBryan Schumaker } 3465e1ca12dfSBryan Schumaker 3466e1ca12dfSBryan Schumaker /* 346717456804SBryan Schumaker * Test if the stateid is valid 346817456804SBryan Schumaker */ 346917456804SBryan Schumaker __be32 347017456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 347117456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 347217456804SBryan Schumaker { 347303cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 347403cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 347503cfb420SBryan Schumaker 347603cfb420SBryan Schumaker nfs4_lock_state(); 347703cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 34787df302f7SChuck Lever stateid->ts_id_status = 34797df302f7SChuck Lever nfsd4_validate_stateid(cl, &stateid->ts_id_stateid); 348003cfb420SBryan Schumaker nfs4_unlock_state(); 348103cfb420SBryan Schumaker 348217456804SBryan Schumaker return nfs_ok; 348317456804SBryan Schumaker } 348417456804SBryan Schumaker 3485e1ca12dfSBryan Schumaker __be32 3486e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3487e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3488e1ca12dfSBryan Schumaker { 3489e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34902da1cec7SJ. Bruce Fields struct nfs4_stid *s; 349138c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34922da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3493e1ca12dfSBryan Schumaker 3494e1ca12dfSBryan Schumaker nfs4_lock_state(); 349538c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 34962da1cec7SJ. Bruce Fields if (!s) 3497e1ca12dfSBryan Schumaker goto out; 34982da1cec7SJ. Bruce Fields switch (s->sc_type) { 34992da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3500e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3501e1ca12dfSBryan Schumaker goto out; 35022da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 35032da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 35042da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 35052da1cec7SJ. Bruce Fields if (ret) 3506e1ca12dfSBryan Schumaker goto out; 35072da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 35082da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 35092da1cec7SJ. Bruce Fields else 35102da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3511f7a4d872SJ. Bruce Fields break; 3512f7a4d872SJ. Bruce Fields default: 3513f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3514e1ca12dfSBryan Schumaker } 3515e1ca12dfSBryan Schumaker out: 3516e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3517e1ca12dfSBryan Schumaker return ret; 3518e1ca12dfSBryan Schumaker } 3519e1ca12dfSBryan Schumaker 35204c4cd222SNeilBrown static inline int 35214c4cd222SNeilBrown setlkflg (int type) 35224c4cd222SNeilBrown { 35234c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35244c4cd222SNeilBrown RD_STATE : WR_STATE; 35254c4cd222SNeilBrown } 35261da177e4SLinus Torvalds 3527dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3528c0a5d93eSJ. Bruce Fields { 3529c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3530c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3531c0a5d93eSJ. Bruce Fields __be32 status; 3532c0a5d93eSJ. Bruce Fields 3533c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3534c0a5d93eSJ. Bruce Fields if (status) 3535c0a5d93eSJ. Bruce Fields return status; 3536f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3537f7a4d872SJ. Bruce Fields /* 3538f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3539f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3540f7a4d872SJ. Bruce Fields */ 3541f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3542f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3543f7a4d872SJ. Bruce Fields if (status) 3544f7a4d872SJ. Bruce Fields return status; 3545f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3546c0a5d93eSJ. Bruce Fields } 3547c0a5d93eSJ. Bruce Fields 35481da177e4SLinus Torvalds /* 35491da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35501da177e4SLinus Torvalds */ 3551b37ad28bSAl Viro static __be32 3552dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35532288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3554dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35551da177e4SLinus Torvalds { 35560836f587SJ. Bruce Fields __be32 status; 355738c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35581da177e4SLinus Torvalds 35598c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35608c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35611da177e4SLinus Torvalds 35621da177e4SLinus Torvalds *stpp = NULL; 356338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3564c0a5d93eSJ. Bruce Fields if (status) 3565c0a5d93eSJ. Bruce Fields return status; 356638c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3567c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35681da177e4SLinus Torvalds 3569c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35701da177e4SLinus Torvalds } 35711da177e4SLinus Torvalds 3572dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3573c0a5d93eSJ. Bruce Fields { 3574c0a5d93eSJ. Bruce Fields __be32 status; 3575c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35761da177e4SLinus Torvalds 3577c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35782288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35790836f587SJ. Bruce Fields if (status) 35800836f587SJ. Bruce Fields return status; 3581c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3582dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3583c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35843a4f98bbSNeilBrown return nfs_ok; 35851da177e4SLinus Torvalds } 35861da177e4SLinus Torvalds 3587b37ad28bSAl Viro __be32 3588ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3589a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35901da177e4SLinus Torvalds { 3591b37ad28bSAl Viro __be32 status; 3592fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3593dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35941da177e4SLinus Torvalds 35951da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3596ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3597ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35981da177e4SLinus Torvalds 3599ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3600a8cddc5dSJ. Bruce Fields if (status) 3601a8cddc5dSJ. Bruce Fields return status; 36021da177e4SLinus Torvalds 36031da177e4SLinus Torvalds nfs4_lock_state(); 36041da177e4SLinus Torvalds 36059072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3606ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 36072288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 36089072d5c6SJ. Bruce Fields if (status) 36091da177e4SLinus Torvalds goto out; 3610fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 361168b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3612dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 361368b66e82SJ. Bruce Fields goto out; 3614dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3615dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3616dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36178c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3618dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3619c7b9a459SNeilBrown 36202a4317c5SJeff Layton nfsd4_client_record_create(oo->oo_owner.so_client); 362168b66e82SJ. Bruce Fields status = nfs_ok; 36221da177e4SLinus Torvalds out: 36235ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36241da177e4SLinus Torvalds nfs4_unlock_state(); 36251da177e4SLinus Torvalds return status; 36261da177e4SLinus Torvalds } 36271da177e4SLinus Torvalds 36286409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36291da177e4SLinus Torvalds { 363082c5ff1bSJeff Layton if (!test_access(access, stp)) 36316409a5a6SJ. Bruce Fields return; 36326409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 363382c5ff1bSJeff Layton clear_access(access, stp); 3634f197c271SJ. Bruce Fields } 36356409a5a6SJ. Bruce Fields 36366409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36376409a5a6SJ. Bruce Fields { 36386409a5a6SJ. Bruce Fields switch (to_access) { 36396409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36406409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36416409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36426409a5a6SJ. Bruce Fields break; 36436409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36446409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36456409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36466409a5a6SJ. Bruce Fields break; 36476409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36486409a5a6SJ. Bruce Fields break; 36496409a5a6SJ. Bruce Fields default: 36506409a5a6SJ. Bruce Fields BUG(); 36511da177e4SLinus Torvalds } 36521da177e4SLinus Torvalds } 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds static void 3655ce0fc43cSJeff Layton reset_union_bmap_deny(unsigned long deny, struct nfs4_ol_stateid *stp) 36561da177e4SLinus Torvalds { 36571da177e4SLinus Torvalds int i; 36581da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36591da177e4SLinus Torvalds if ((i & deny) != i) 3660ce0fc43cSJeff Layton clear_deny(i, stp); 36611da177e4SLinus Torvalds } 36621da177e4SLinus Torvalds } 36631da177e4SLinus Torvalds 3664b37ad28bSAl Viro __be32 3665ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3666ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3667a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36681da177e4SLinus Torvalds { 3669b37ad28bSAl Viro __be32 status; 3670dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36711da177e4SLinus Torvalds 36721da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3673ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3674ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36751da177e4SLinus Torvalds 3676c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36772c8bd7e0SBenny Halevy if (od->od_deleg_want) 36782c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36792c8bd7e0SBenny Halevy od->od_deleg_want); 36801da177e4SLinus Torvalds 36811da177e4SLinus Torvalds nfs4_lock_state(); 3682c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3683c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36849072d5c6SJ. Bruce Fields if (status) 36851da177e4SLinus Torvalds goto out; 36861da177e4SLinus Torvalds status = nfserr_inval; 368782c5ff1bSJeff Layton if (!test_access(od->od_share_access, stp)) { 36881da177e4SLinus Torvalds dprintk("NFSD: access not a subset current bitmap: 0x%lx, input access=%08x\n", 36891da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36901da177e4SLinus Torvalds goto out; 36911da177e4SLinus Torvalds } 3692ce0fc43cSJeff Layton if (!test_deny(od->od_share_deny, stp)) { 36931da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36941da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 36951da177e4SLinus Torvalds goto out; 36961da177e4SLinus Torvalds } 36976409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 36981da177e4SLinus Torvalds 3699ce0fc43cSJeff Layton reset_union_bmap_deny(od->od_share_deny, stp); 37001da177e4SLinus Torvalds 3701dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3702dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37031da177e4SLinus Torvalds status = nfs_ok; 37041da177e4SLinus Torvalds out: 37055ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37061da177e4SLinus Torvalds nfs4_unlock_state(); 37071da177e4SLinus Torvalds return status; 37081da177e4SLinus Torvalds } 37091da177e4SLinus Torvalds 371038c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 371138c387b5SJ. Bruce Fields { 371238c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 371338c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 371438c387b5SJ. Bruce Fields 371538c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 371638c387b5SJ. Bruce Fields return; 371738c387b5SJ. Bruce Fields oo = openowner(so); 371838c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 371938c387b5SJ. Bruce Fields if (!s) 372038c387b5SJ. Bruce Fields return; 372138c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 372238c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 372338c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 372438c387b5SJ. Bruce Fields return; 372538c387b5SJ. Bruce Fields } 372638c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3727f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3728f7a4d872SJ. Bruce Fields } 3729f7a4d872SJ. Bruce Fields 3730f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3731f7a4d872SJ. Bruce Fields { 3732f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3733f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 373438c387b5SJ. Bruce Fields } 373538c387b5SJ. Bruce Fields 37361da177e4SLinus Torvalds /* 37371da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37381da177e4SLinus Torvalds */ 3739b37ad28bSAl Viro __be32 3740ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3741a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37421da177e4SLinus Torvalds { 3743b37ad28bSAl Viro __be32 status; 3744fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3745dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37461da177e4SLinus Torvalds 37471da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3748ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3749ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37501da177e4SLinus Torvalds 37511da177e4SLinus Torvalds nfs4_lock_state(); 3752f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3753f7a4d872SJ. Bruce Fields &close->cl_stateid, 3754f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3755f7a4d872SJ. Bruce Fields &stp); 37569072d5c6SJ. Bruce Fields if (status) 37571da177e4SLinus Torvalds goto out; 3758fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37591da177e4SLinus Torvalds status = nfs_ok; 3760dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3761dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37621da177e4SLinus Torvalds 3763f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 376438c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 376504ef5954SJ. Bruce Fields 376604ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 376704ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 376804ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 376904ef5954SJ. Bruce Fields */ 3770fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3771fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 37721da177e4SLinus Torvalds out: 37735ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37741da177e4SLinus Torvalds nfs4_unlock_state(); 37751da177e4SLinus Torvalds return status; 37761da177e4SLinus Torvalds } 37771da177e4SLinus Torvalds 3778b37ad28bSAl Viro __be32 3779ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3780ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37811da177e4SLinus Torvalds { 3782203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3783203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 378438c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3785203a8c8eSJ. Bruce Fields struct inode *inode; 3786b37ad28bSAl Viro __be32 status; 37871da177e4SLinus Torvalds 3788ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3789203a8c8eSJ. Bruce Fields return status; 3790203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37911da177e4SLinus Torvalds 37921da177e4SLinus Torvalds nfs4_lock_state(); 379338c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 379438c2f4b1SJ. Bruce Fields if (status) 3795203a8c8eSJ. Bruce Fields goto out; 379638c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3797d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3798203a8c8eSJ. Bruce Fields if (status) 3799203a8c8eSJ. Bruce Fields goto out; 3800203a8c8eSJ. Bruce Fields 3801203a8c8eSJ. Bruce Fields unhash_delegation(dp); 38021da177e4SLinus Torvalds out: 3803203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3804203a8c8eSJ. Bruce Fields 38051da177e4SLinus Torvalds return status; 38061da177e4SLinus Torvalds } 38071da177e4SLinus Torvalds 38081da177e4SLinus Torvalds 38091da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 38101da177e4SLinus Torvalds 3811009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3812009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3813009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 38141da177e4SLinus Torvalds 381587df4de8SBenny Halevy static inline u64 381687df4de8SBenny Halevy end_offset(u64 start, u64 len) 381787df4de8SBenny Halevy { 381887df4de8SBenny Halevy u64 end; 381987df4de8SBenny Halevy 382087df4de8SBenny Halevy end = start + len; 382187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 382287df4de8SBenny Halevy } 382387df4de8SBenny Halevy 382487df4de8SBenny Halevy /* last octet in a range */ 382587df4de8SBenny Halevy static inline u64 382687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 382787df4de8SBenny Halevy { 382887df4de8SBenny Halevy u64 end; 382987df4de8SBenny Halevy 383087df4de8SBenny Halevy BUG_ON(!len); 383187df4de8SBenny Halevy end = start + len; 383287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 383387df4de8SBenny Halevy } 383487df4de8SBenny Halevy 3835009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38361da177e4SLinus Torvalds { 38371da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38381da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3839009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38401da177e4SLinus Torvalds } 38411da177e4SLinus Torvalds 3842009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38431da177e4SLinus Torvalds 38441da177e4SLinus Torvalds /* 38451da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38461da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38471da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38481da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38491da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38501da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38511da177e4SLinus Torvalds */ 38521da177e4SLinus Torvalds static inline void 38531da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38541da177e4SLinus Torvalds { 38551da177e4SLinus Torvalds if (lock->fl_start < 0) 38561da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38571da177e4SLinus Torvalds if (lock->fl_end < 0) 38581da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38591da177e4SLinus Torvalds } 38601da177e4SLinus Torvalds 3861d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3862d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38637b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3864d5b9026aSNeilBrown }; 38651da177e4SLinus Torvalds 38661da177e4SLinus Torvalds static inline void 38671da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38681da177e4SLinus Torvalds { 3869fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38701da177e4SLinus Torvalds 3871d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3872fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3873fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3874fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38757c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38767c13f344SJ. Bruce Fields /* We just don't care that much */ 38777c13f344SJ. Bruce Fields goto nevermind; 3878fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3879fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3880d5b9026aSNeilBrown } else { 38817c13f344SJ. Bruce Fields nevermind: 38827c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38837c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3884d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3885d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38861da177e4SLinus Torvalds } 38871da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 388887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 388987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38901da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38911da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38921da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38931da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38941da177e4SLinus Torvalds } 38951da177e4SLinus Torvalds 3896b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3897b93d87c1SJ. Bruce Fields { 3898b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3899b93d87c1SJ. Bruce Fields 3900b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3901b93d87c1SJ. Bruce Fields return false; 3902b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3903b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3904b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3905b93d87c1SJ. Bruce Fields } 3906b93d87c1SJ. Bruce Fields 3907fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3908fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 39091da177e4SLinus Torvalds struct xdr_netobj *owner) 39101da177e4SLinus Torvalds { 3911009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3912b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 39131da177e4SLinus Torvalds 3914009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3915b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3916b93d87c1SJ. Bruce Fields return lo; 39171da177e4SLinus Torvalds } 39181da177e4SLinus Torvalds return NULL; 39191da177e4SLinus Torvalds } 39201da177e4SLinus Torvalds 3921dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3922ff194bd9SJ. Bruce Fields { 3923009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3924009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3925009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3926009673b4SJ. Bruce Fields 392716bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3928009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3929fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3930ff194bd9SJ. Bruce Fields } 3931ff194bd9SJ. Bruce Fields 39321da177e4SLinus Torvalds /* 39331da177e4SLinus Torvalds * Alloc a lock owner structure. 39341da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 393525985edcSLucas De Marchi * occurred. 39361da177e4SLinus Torvalds * 393716bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39381da177e4SLinus Torvalds */ 39391da177e4SLinus Torvalds 3940fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3941dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3942fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39431da177e4SLinus Torvalds 3944fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3945fe0750e5SJ. Bruce Fields if (!lo) 39461da177e4SLinus Torvalds return NULL; 3947fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3948fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3949b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3950b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3951fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3952fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3953fe0750e5SJ. Bruce Fields return lo; 39541da177e4SLinus Torvalds } 39551da177e4SLinus Torvalds 3956dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3957dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39581da177e4SLinus Torvalds { 3959dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3960d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39611da177e4SLinus Torvalds 3962996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39635ac049acSNeilBrown if (stp == NULL) 39646136d2b4SJ. Bruce Fields return NULL; 3965996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39668beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3967fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3968fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 396913cd2184SNeilBrown get_nfs4_file(fp); 39701da177e4SLinus Torvalds stp->st_file = fp; 39710997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39721da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39734c4cd222SNeilBrown stp->st_openstp = open_stp; 39741da177e4SLinus Torvalds return stp; 39751da177e4SLinus Torvalds } 39761da177e4SLinus Torvalds 3977fd39ca9aSNeilBrown static int 39781da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39791da177e4SLinus Torvalds { 398087df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39811da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39821da177e4SLinus Torvalds } 39831da177e4SLinus Torvalds 3984dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39850997b173SJ. Bruce Fields { 39860997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39870997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39880997b173SJ. Bruce Fields 398982c5ff1bSJeff Layton if (test_access(access, lock_stp)) 39900997b173SJ. Bruce Fields return; 39910997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 399282c5ff1bSJeff Layton set_access(access, lock_stp); 39930997b173SJ. Bruce Fields } 39940997b173SJ. Bruce Fields 39952355c596SJ. 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) 399664a284d0SJ. Bruce Fields { 399764a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 399864a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 399964a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 400064a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 400164a284d0SJ. Bruce Fields unsigned int strhashval; 400264a284d0SJ. Bruce Fields 400364a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 400464a284d0SJ. Bruce Fields if (lo) { 400564a284d0SJ. Bruce Fields if (!cstate->minorversion) 400664a284d0SJ. Bruce Fields return nfserr_bad_seqid; 400764a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 400864a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 400964a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 401064a284d0SJ. Bruce Fields return nfs_ok; 401164a284d0SJ. Bruce Fields } 401216bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 401364a284d0SJ. Bruce Fields &lock->v.new.owner); 401464a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 401564a284d0SJ. Bruce Fields if (lo == NULL) 401664a284d0SJ. Bruce Fields return nfserr_jukebox; 401764a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 401864a284d0SJ. Bruce Fields if (*lst == NULL) { 401964a284d0SJ. Bruce Fields release_lockowner(lo); 402064a284d0SJ. Bruce Fields return nfserr_jukebox; 402164a284d0SJ. Bruce Fields } 402264a284d0SJ. Bruce Fields *new = true; 402364a284d0SJ. Bruce Fields return nfs_ok; 402464a284d0SJ. Bruce Fields } 402564a284d0SJ. Bruce Fields 40261da177e4SLinus Torvalds /* 40271da177e4SLinus Torvalds * LOCK operation 40281da177e4SLinus Torvalds */ 4029b37ad28bSAl Viro __be32 4030ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4031a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40321da177e4SLinus Torvalds { 4033fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4034fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4035dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40367d947842SJ. Bruce Fields struct file *filp = NULL; 40371da177e4SLinus Torvalds struct file_lock file_lock; 40388dc7c311SAndy Adamson struct file_lock conflock; 4039b37ad28bSAl Viro __be32 status = 0; 404064a284d0SJ. Bruce Fields bool new_state = false; 4041b34f27aaSJ. Bruce Fields int lkflg; 4042b8dd7b9aSAl Viro int err; 40431da177e4SLinus Torvalds 40441da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40451da177e4SLinus Torvalds (long long) lock->lk_offset, 40461da177e4SLinus Torvalds (long long) lock->lk_length); 40471da177e4SLinus Torvalds 40481da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40491da177e4SLinus Torvalds return nfserr_inval; 40501da177e4SLinus Torvalds 4051ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40528837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4053a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4054a6f6ef2fSAndy Adamson return status; 4055a6f6ef2fSAndy Adamson } 4056a6f6ef2fSAndy Adamson 40571da177e4SLinus Torvalds nfs4_lock_state(); 40581da177e4SLinus Torvalds 40591da177e4SLinus Torvalds if (lock->lk_is_new) { 4060dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40611da177e4SLinus Torvalds 4062684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4063684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4064684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4065684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4066684e5638SJ. Bruce Fields sizeof(clientid_t)); 4067684e5638SJ. Bruce Fields 40681da177e4SLinus Torvalds status = nfserr_stale_clientid; 4069684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40701da177e4SLinus Torvalds goto out; 40711da177e4SLinus Torvalds 40721da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4073c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40741da177e4SLinus Torvalds lock->lk_new_open_seqid, 40751da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4076c0a5d93eSJ. Bruce Fields &open_stp); 407737515177SNeilBrown if (status) 40781da177e4SLinus Torvalds goto out; 4079fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4080b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4081684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4082b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4083b34f27aaSJ. Bruce Fields goto out; 408464a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 408564a284d0SJ. Bruce Fields &lock_stp, &new_state); 4086e1aaa891SJ. Bruce Fields } else 4087dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40881da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40891da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 40902288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 40911da177e4SLinus Torvalds if (status) 40921da177e4SLinus Torvalds goto out; 4093fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 40941da177e4SLinus Torvalds 4095b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4096b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4097b34f27aaSJ. Bruce Fields if (status) 4098b34f27aaSJ. Bruce Fields goto out; 4099b34f27aaSJ. Bruce Fields 41000dd395dcSNeilBrown status = nfserr_grace; 4101af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 41020dd395dcSNeilBrown goto out; 41030dd395dcSNeilBrown status = nfserr_no_grace; 4104af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 41050dd395dcSNeilBrown goto out; 41060dd395dcSNeilBrown 41071da177e4SLinus Torvalds locks_init_lock(&file_lock); 41081da177e4SLinus Torvalds switch (lock->lk_type) { 41091da177e4SLinus Torvalds case NFS4_READ_LT: 41101da177e4SLinus Torvalds case NFS4_READW_LT: 4111f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41120997b173SJ. Bruce Fields if (filp) 41130997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41141da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41151da177e4SLinus Torvalds break; 41161da177e4SLinus Torvalds case NFS4_WRITE_LT: 41171da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4118f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41190997b173SJ. Bruce Fields if (filp) 41200997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41211da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41221da177e4SLinus Torvalds break; 41231da177e4SLinus Torvalds default: 41241da177e4SLinus Torvalds status = nfserr_inval; 41251da177e4SLinus Torvalds goto out; 41261da177e4SLinus Torvalds } 4127f9d7562fSJ. Bruce Fields if (!filp) { 4128f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4129f9d7562fSJ. Bruce Fields goto out; 4130f9d7562fSJ. Bruce Fields } 4131b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41321da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41331da177e4SLinus Torvalds file_lock.fl_file = filp; 41341da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4135d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41361da177e4SLinus Torvalds 41371da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 413887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41391da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41401da177e4SLinus Torvalds 41411da177e4SLinus Torvalds /* 41421da177e4SLinus Torvalds * Try to lock the file in the VFS. 41431da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41441da177e4SLinus Torvalds */ 41451da177e4SLinus Torvalds 4146529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4147b8dd7b9aSAl Viro switch (-err) { 41481da177e4SLinus Torvalds case 0: /* success! */ 4149dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4150dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41511da177e4SLinus Torvalds sizeof(stateid_t)); 4152b8dd7b9aSAl Viro status = 0; 4153eb76b3fdSAndy Adamson break; 4154eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4155eb76b3fdSAndy Adamson status = nfserr_denied; 4156eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4157eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4158eb76b3fdSAndy Adamson break; 41591da177e4SLinus Torvalds case (EDEADLK): 41601da177e4SLinus Torvalds status = nfserr_deadlock; 4161eb76b3fdSAndy Adamson break; 41621da177e4SLinus Torvalds default: 4163fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41643e772463SJ. Bruce Fields status = nfserrno(err); 4165eb76b3fdSAndy Adamson break; 41661da177e4SLinus Torvalds } 41671da177e4SLinus Torvalds out: 416864a284d0SJ. Bruce Fields if (status && new_state) 4169f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41705ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41711da177e4SLinus Torvalds nfs4_unlock_state(); 41721da177e4SLinus Torvalds return status; 41731da177e4SLinus Torvalds } 41741da177e4SLinus Torvalds 41751da177e4SLinus Torvalds /* 417655ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 417755ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 417855ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 417955ef1274SJ. Bruce Fields * inode operation.) 418055ef1274SJ. Bruce Fields */ 418104da6e9dSAl Viro static __be32 nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 418255ef1274SJ. Bruce Fields { 418355ef1274SJ. Bruce Fields struct file *file; 418404da6e9dSAl Viro __be32 err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 418504da6e9dSAl Viro if (!err) { 418604da6e9dSAl Viro err = nfserrno(vfs_test_lock(file, lock)); 418755ef1274SJ. Bruce Fields nfsd_close(file); 418804da6e9dSAl Viro } 418955ef1274SJ. Bruce Fields return err; 419055ef1274SJ. Bruce Fields } 419155ef1274SJ. Bruce Fields 419255ef1274SJ. Bruce Fields /* 41931da177e4SLinus Torvalds * LOCKT operation 41941da177e4SLinus Torvalds */ 4195b37ad28bSAl Viro __be32 4196ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4197ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41981da177e4SLinus Torvalds { 41991da177e4SLinus Torvalds struct inode *inode; 42001da177e4SLinus Torvalds struct file_lock file_lock; 4201fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4202b37ad28bSAl Viro __be32 status; 42031da177e4SLinus Torvalds 4204af558e33SJ. Bruce Fields if (locks_in_grace()) 42051da177e4SLinus Torvalds return nfserr_grace; 42061da177e4SLinus Torvalds 42071da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42081da177e4SLinus Torvalds return nfserr_inval; 42091da177e4SLinus Torvalds 42101da177e4SLinus Torvalds nfs4_lock_state(); 42111da177e4SLinus Torvalds 42121da177e4SLinus Torvalds status = nfserr_stale_clientid; 421360adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42141da177e4SLinus Torvalds goto out; 42151da177e4SLinus Torvalds 421675c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42171da177e4SLinus Torvalds goto out; 42181da177e4SLinus Torvalds 4219ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42201da177e4SLinus Torvalds locks_init_lock(&file_lock); 42211da177e4SLinus Torvalds switch (lockt->lt_type) { 42221da177e4SLinus Torvalds case NFS4_READ_LT: 42231da177e4SLinus Torvalds case NFS4_READW_LT: 42241da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42251da177e4SLinus Torvalds break; 42261da177e4SLinus Torvalds case NFS4_WRITE_LT: 42271da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42281da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42291da177e4SLinus Torvalds break; 42301da177e4SLinus Torvalds default: 42312fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42321da177e4SLinus Torvalds status = nfserr_inval; 42331da177e4SLinus Torvalds goto out; 42341da177e4SLinus Torvalds } 42351da177e4SLinus Torvalds 4236fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4237fe0750e5SJ. Bruce Fields if (lo) 4238fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42391da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42401da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42411da177e4SLinus Torvalds 42421da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 424387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42441da177e4SLinus Torvalds 42451da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42461da177e4SLinus Torvalds 424704da6e9dSAl Viro status = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 424804da6e9dSAl Viro if (status) 4249fd85b817SMarc Eshel goto out; 425004da6e9dSAl Viro 42519d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42521da177e4SLinus Torvalds status = nfserr_denied; 42539d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42541da177e4SLinus Torvalds } 42551da177e4SLinus Torvalds out: 42561da177e4SLinus Torvalds nfs4_unlock_state(); 42571da177e4SLinus Torvalds return status; 42581da177e4SLinus Torvalds } 42591da177e4SLinus Torvalds 4260b37ad28bSAl Viro __be32 4261ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4262a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42631da177e4SLinus Torvalds { 4264dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42651da177e4SLinus Torvalds struct file *filp = NULL; 42661da177e4SLinus Torvalds struct file_lock file_lock; 4267b37ad28bSAl Viro __be32 status; 4268b8dd7b9aSAl Viro int err; 42691da177e4SLinus Torvalds 42701da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42711da177e4SLinus Torvalds (long long) locku->lu_offset, 42721da177e4SLinus Torvalds (long long) locku->lu_length); 42731da177e4SLinus Torvalds 42741da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42751da177e4SLinus Torvalds return nfserr_inval; 42761da177e4SLinus Torvalds 42771da177e4SLinus Torvalds nfs4_lock_state(); 42781da177e4SLinus Torvalds 42799072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 42802288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 42819072d5c6SJ. Bruce Fields if (status) 42821da177e4SLinus Torvalds goto out; 4283f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4284f9d7562fSJ. Bruce Fields if (!filp) { 4285f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4286f9d7562fSJ. Bruce Fields goto out; 4287f9d7562fSJ. Bruce Fields } 42881da177e4SLinus Torvalds BUG_ON(!filp); 42891da177e4SLinus Torvalds locks_init_lock(&file_lock); 42901da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4291fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 42921da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42931da177e4SLinus Torvalds file_lock.fl_file = filp; 42941da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4295d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42961da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42971da177e4SLinus Torvalds 429887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42991da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 43001da177e4SLinus Torvalds 43011da177e4SLinus Torvalds /* 43021da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43031da177e4SLinus Torvalds */ 4304fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4305b8dd7b9aSAl Viro if (err) { 4306fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43071da177e4SLinus Torvalds goto out_nfserr; 43081da177e4SLinus Torvalds } 43091da177e4SLinus Torvalds /* 43101da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43111da177e4SLinus Torvalds */ 4312dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4313dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43141da177e4SLinus Torvalds 43151da177e4SLinus Torvalds out: 431671c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43171da177e4SLinus Torvalds nfs4_unlock_state(); 43181da177e4SLinus Torvalds return status; 43191da177e4SLinus Torvalds 43201da177e4SLinus Torvalds out_nfserr: 4321b8dd7b9aSAl Viro status = nfserrno(err); 43221da177e4SLinus Torvalds goto out; 43231da177e4SLinus Torvalds } 43241da177e4SLinus Torvalds 43251da177e4SLinus Torvalds /* 43261da177e4SLinus Torvalds * returns 43271da177e4SLinus Torvalds * 1: locks held by lockowner 43281da177e4SLinus Torvalds * 0: no locks held by lockowner 43291da177e4SLinus Torvalds */ 43301da177e4SLinus Torvalds static int 4331fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43321da177e4SLinus Torvalds { 43331da177e4SLinus Torvalds struct file_lock **flpp; 4334f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43351da177e4SLinus Torvalds int status = 0; 43361da177e4SLinus Torvalds 4337b89f4321SArnd Bergmann lock_flocks(); 43381da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4339796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43401da177e4SLinus Torvalds status = 1; 43411da177e4SLinus Torvalds goto out; 43421da177e4SLinus Torvalds } 4343796dadfdSJ. Bruce Fields } 43441da177e4SLinus Torvalds out: 4345b89f4321SArnd Bergmann unlock_flocks(); 43461da177e4SLinus Torvalds return status; 43471da177e4SLinus Torvalds } 43481da177e4SLinus Torvalds 4349b37ad28bSAl Viro __be32 4350b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4351b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4352b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43531da177e4SLinus Torvalds { 43541da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43553e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4356fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4357dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43581da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43593e9e3dbeSNeilBrown struct list_head matches; 436016bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4361b37ad28bSAl Viro __be32 status; 43621da177e4SLinus Torvalds 43631da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43641da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43651da177e4SLinus Torvalds 43661da177e4SLinus Torvalds /* XXX check for lease expiration */ 43671da177e4SLinus Torvalds 43681da177e4SLinus Torvalds status = nfserr_stale_clientid; 4369849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43701da177e4SLinus Torvalds return status; 43711da177e4SLinus Torvalds 43721da177e4SLinus Torvalds nfs4_lock_state(); 43731da177e4SLinus Torvalds 43741da177e4SLinus Torvalds status = nfserr_locks_held; 43753e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 437606f1f864SJ. Bruce Fields 437716bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 437816bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 437916bfdaafSJ. Bruce Fields continue; 4380599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43813e9e3dbeSNeilBrown continue; 43823e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4383ea1da636SNeilBrown st_perstateowner) { 4384fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4385fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 43861da177e4SLinus Torvalds goto out; 4387fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 43881da177e4SLinus Torvalds } 43893e9e3dbeSNeilBrown } 43903e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43913e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43923e9e3dbeSNeilBrown * have been checked. */ 43931da177e4SLinus Torvalds status = nfs_ok; 43940fa822e4SNeilBrown while (!list_empty(&matches)) { 4395fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4396fe0750e5SJ. Bruce Fields lo_list); 43970fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43980fa822e4SNeilBrown * for openowners. */ 4399fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4400fe0750e5SJ. Bruce Fields release_lockowner(lo); 44011da177e4SLinus Torvalds } 44021da177e4SLinus Torvalds out: 44031da177e4SLinus Torvalds nfs4_unlock_state(); 44041da177e4SLinus Torvalds return status; 44051da177e4SLinus Torvalds } 44061da177e4SLinus Torvalds 44071da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4408a55370a3SNeilBrown alloc_reclaim(void) 44091da177e4SLinus Torvalds { 4410a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44111da177e4SLinus Torvalds } 44121da177e4SLinus Torvalds 4413c7b9a459SNeilBrown int 4414a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4415c7b9a459SNeilBrown { 4416c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4417c7b9a459SNeilBrown struct nfs4_client *clp; 4418c7b9a459SNeilBrown 4419e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4420393d8ed8SJ. Bruce Fields if (!clp) 4421393d8ed8SJ. Bruce Fields return 0; 4422a52d726bSJeff Layton return test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags); 4423c7b9a459SNeilBrown } 4424c7b9a459SNeilBrown 44251da177e4SLinus Torvalds /* 44261da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44271da177e4SLinus Torvalds */ 4428190e4fbfSNeilBrown int 4429190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44301da177e4SLinus Torvalds { 44311da177e4SLinus Torvalds unsigned int strhashval; 44321da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44331da177e4SLinus Torvalds 4434a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4435a55370a3SNeilBrown crp = alloc_reclaim(); 44361da177e4SLinus Torvalds if (!crp) 44371da177e4SLinus Torvalds return 0; 4438a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44391da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44401da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4441a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44421da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44431da177e4SLinus Torvalds return 1; 44441da177e4SLinus Torvalds } 44451da177e4SLinus Torvalds 44462a4317c5SJeff Layton void 44471da177e4SLinus Torvalds nfs4_release_reclaim(void) 44481da177e4SLinus Torvalds { 44491da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44501da177e4SLinus Torvalds int i; 44511da177e4SLinus Torvalds 44521da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44531da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44541da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44551da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44561da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44571da177e4SLinus Torvalds kfree(crp); 44581da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44591da177e4SLinus Torvalds } 44601da177e4SLinus Torvalds } 44611da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44621da177e4SLinus Torvalds } 44631da177e4SLinus Torvalds 44641da177e4SLinus Torvalds /* 44651da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 44662a4317c5SJeff Layton struct nfs4_client_reclaim * 4467a52d726bSJeff Layton nfsd4_find_reclaim_client(struct nfs4_client *clp) 44681da177e4SLinus Torvalds { 44691da177e4SLinus Torvalds unsigned int strhashval; 44701da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44711da177e4SLinus Torvalds 4472a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4473a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4474a55370a3SNeilBrown clp->cl_recdir); 44751da177e4SLinus Torvalds 44761da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4477a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44781da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4479a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44801da177e4SLinus Torvalds return crp; 44811da177e4SLinus Torvalds } 44821da177e4SLinus Torvalds } 44831da177e4SLinus Torvalds return NULL; 44841da177e4SLinus Torvalds } 44851da177e4SLinus Torvalds 44861da177e4SLinus Torvalds /* 44871da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44881da177e4SLinus Torvalds */ 4489b37ad28bSAl Viro __be32 44901da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44911da177e4SLinus Torvalds { 4492a52d726bSJeff Layton struct nfs4_client *clp; 4493a52d726bSJeff Layton 4494a52d726bSJeff Layton /* find clientid in conf_id_hashtbl */ 4495a52d726bSJeff Layton clp = find_confirmed_client(clid); 4496a52d726bSJeff Layton if (clp == NULL) 4497a52d726bSJeff Layton return nfserr_reclaim_bad; 4498a52d726bSJeff Layton 4499a52d726bSJeff Layton return nfsd4_client_record_check(clp) ? nfserr_reclaim_bad : nfs_ok; 45001da177e4SLinus Torvalds } 45011da177e4SLinus Torvalds 450265178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 450365178db4SBryan Schumaker 450465178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 450565178db4SBryan Schumaker { 450665178db4SBryan Schumaker struct nfs4_client *clp, *next; 450765178db4SBryan Schumaker int count = 0; 450865178db4SBryan Schumaker 450965178db4SBryan Schumaker nfs4_lock_state(); 451065178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 45112a4317c5SJeff Layton nfsd4_client_record_remove(clp); 451265178db4SBryan Schumaker expire_client(clp); 451365178db4SBryan Schumaker if (++count == num) 451465178db4SBryan Schumaker break; 451565178db4SBryan Schumaker } 451665178db4SBryan Schumaker nfs4_unlock_state(); 451765178db4SBryan Schumaker 451865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 451965178db4SBryan Schumaker } 452065178db4SBryan Schumaker 452165178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 452265178db4SBryan Schumaker { 452365178db4SBryan Schumaker release_lockowner(lockowner(sop)); 452465178db4SBryan Schumaker } 452565178db4SBryan Schumaker 452665178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 452765178db4SBryan Schumaker { 452865178db4SBryan Schumaker release_openowner(openowner(sop)); 452965178db4SBryan Schumaker } 453065178db4SBryan Schumaker 4531353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 453265178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 453365178db4SBryan Schumaker { 453465178db4SBryan Schumaker int i, count = 0; 453565178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 453665178db4SBryan Schumaker 453716bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 453816bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 453916bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 454016bfdaafSJ. Bruce Fields continue; 454165178db4SBryan Schumaker release_sop(sop); 454265178db4SBryan Schumaker if (++count == num) 454365178db4SBryan Schumaker return count; 454465178db4SBryan Schumaker } 454565178db4SBryan Schumaker } 454665178db4SBryan Schumaker return count; 454765178db4SBryan Schumaker } 454865178db4SBryan Schumaker 454965178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 455065178db4SBryan Schumaker { 455165178db4SBryan Schumaker int count; 455265178db4SBryan Schumaker 455365178db4SBryan Schumaker nfs4_lock_state(); 455416bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 455565178db4SBryan Schumaker nfs4_unlock_state(); 455665178db4SBryan Schumaker 455765178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 455865178db4SBryan Schumaker } 455965178db4SBryan Schumaker 456065178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 456165178db4SBryan Schumaker { 456265178db4SBryan Schumaker int count; 456365178db4SBryan Schumaker 456465178db4SBryan Schumaker nfs4_lock_state(); 456516bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 456665178db4SBryan Schumaker nfs4_unlock_state(); 456765178db4SBryan Schumaker 456865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 456965178db4SBryan Schumaker } 457065178db4SBryan Schumaker 457165178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 457265178db4SBryan Schumaker { 457365178db4SBryan Schumaker int i, count = 0; 45742d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 45752d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 457665178db4SBryan Schumaker 457765178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 45782d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 45792d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 458065178db4SBryan Schumaker deleg_func(dp); 458165178db4SBryan Schumaker if (++count == num) 458265178db4SBryan Schumaker return count; 458365178db4SBryan Schumaker } 458465178db4SBryan Schumaker } 458565178db4SBryan Schumaker } 45862d3475c0SBryan Schumaker 458765178db4SBryan Schumaker return count; 458865178db4SBryan Schumaker } 458965178db4SBryan Schumaker 459065178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 459165178db4SBryan Schumaker { 459265178db4SBryan Schumaker unsigned int count; 459365178db4SBryan Schumaker 459465178db4SBryan Schumaker nfs4_lock_state(); 459565178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 459665178db4SBryan Schumaker nfs4_unlock_state(); 459765178db4SBryan Schumaker 459865178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 459965178db4SBryan Schumaker } 460065178db4SBryan Schumaker 460165178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 460265178db4SBryan Schumaker { 460365178db4SBryan Schumaker unsigned int count; 460465178db4SBryan Schumaker 460565178db4SBryan Schumaker nfs4_lock_state(); 460665178db4SBryan Schumaker spin_lock(&recall_lock); 460765178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 460865178db4SBryan Schumaker spin_unlock(&recall_lock); 460965178db4SBryan Schumaker nfs4_unlock_state(); 461065178db4SBryan Schumaker 461165178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 461265178db4SBryan Schumaker } 461365178db4SBryan Schumaker 461465178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 461565178db4SBryan Schumaker 4616ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46171da177e4SLinus Torvalds 461872083396SBryan Schumaker void 4619ac4d8ff2SNeilBrown nfs4_state_init(void) 46201da177e4SLinus Torvalds { 462172083396SBryan Schumaker int i; 46221da177e4SLinus Torvalds 46231da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46241da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46251da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46261da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46271da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 462802cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46291da177e4SLinus Torvalds } 46305282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46315282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46321da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46331da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46341da177e4SLinus Torvalds } 463516bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 463616bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46371da177e4SLinus Torvalds } 4638009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4639009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46401da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46411da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46421da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4643ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4644ac4d8ff2SNeilBrown } 4645ac4d8ff2SNeilBrown 4646c2f1a551SMeelap Shah /* 4647c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4648c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4649c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4650c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4651c2f1a551SMeelap Shah * 4652c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4653c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4654c2f1a551SMeelap Shah */ 4655c2f1a551SMeelap Shah static void 4656c2f1a551SMeelap Shah set_max_delegations(void) 4657c2f1a551SMeelap Shah { 4658c2f1a551SMeelap Shah /* 4659c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4660c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4661c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4662c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4663c2f1a551SMeelap Shah */ 4664c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4665c2f1a551SMeelap Shah } 4666c2f1a551SMeelap Shah 4667ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4668ac4d8ff2SNeilBrown 4669a6d6b781SJeff Layton int 4670a6d6b781SJeff Layton nfs4_state_start(void) 4671ac4d8ff2SNeilBrown { 4672b5a1a81eSJ. Bruce Fields int ret; 4673b5a1a81eSJ. Bruce Fields 46742a4317c5SJeff Layton /* 46752a4317c5SJeff Layton * FIXME: For now, we hang most of the pernet global stuff off of 46762a4317c5SJeff Layton * init_net until nfsd is fully containerized. Eventually, we'll 46772a4317c5SJeff Layton * need to pass a net pointer into this function, take a reference 46782a4317c5SJeff Layton * to that instead and then do most of the rest of this on a per-net 46792a4317c5SJeff Layton * basis. 46802a4317c5SJeff Layton */ 46812a4317c5SJeff Layton get_net(&init_net); 46822a4317c5SJeff Layton nfsd4_client_tracking_init(&init_net); 46831da177e4SLinus Torvalds boot_time = get_seconds(); 4684af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 468533dcc481SJeff Layton grace_ended = false; 46869a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4687e46b498cSJ. Bruce Fields nfsd4_grace); 4688b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4689a6d6b781SJeff Layton if (ret) { 4690a6d6b781SJeff Layton ret = -ENOMEM; 4691a6d6b781SJeff Layton goto out_recovery; 4692a6d6b781SJeff Layton } 469358da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 4694a6d6b781SJeff Layton if (laundry_wq == NULL) { 4695a6d6b781SJeff Layton ret = -ENOMEM; 4696a6d6b781SJeff Layton goto out_recovery; 4697a6d6b781SJeff Layton } 4698b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4699b5a1a81eSJ. Bruce Fields if (ret) 4700b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4701e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4702c2f1a551SMeelap Shah set_max_delegations(); 4703b5a1a81eSJ. Bruce Fields return 0; 4704b5a1a81eSJ. Bruce Fields out_free_laundry: 4705b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4706a6d6b781SJeff Layton out_recovery: 47072a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47082a4317c5SJeff Layton put_net(&init_net); 4709b5a1a81eSJ. Bruce Fields return ret; 47101da177e4SLinus Torvalds } 47111da177e4SLinus Torvalds 47121da177e4SLinus Torvalds static void 47131da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47141da177e4SLinus Torvalds { 47151da177e4SLinus Torvalds int i; 47161da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47171da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47181da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47191da177e4SLinus Torvalds 47201da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47211da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47221da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47231da177e4SLinus Torvalds expire_client(clp); 47241da177e4SLinus Torvalds } 47251da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47261da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47271da177e4SLinus Torvalds expire_client(clp); 47281da177e4SLinus Torvalds } 47291da177e4SLinus Torvalds } 47301da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47311da177e4SLinus Torvalds spin_lock(&recall_lock); 47321da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47331da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47341da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47351da177e4SLinus Torvalds } 47361da177e4SLinus Torvalds spin_unlock(&recall_lock); 47371da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47381da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47391da177e4SLinus Torvalds unhash_delegation(dp); 47401da177e4SLinus Torvalds } 47411da177e4SLinus Torvalds 47422a4317c5SJeff Layton nfsd4_client_tracking_exit(&init_net); 47432a4317c5SJeff Layton put_net(&init_net); 47441da177e4SLinus Torvalds } 47451da177e4SLinus Torvalds 47461da177e4SLinus Torvalds void 47471da177e4SLinus Torvalds nfs4_state_shutdown(void) 47481da177e4SLinus Torvalds { 4749afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 47505e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 47512c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 47521da177e4SLinus Torvalds nfs4_lock_state(); 47531da177e4SLinus Torvalds __nfs4_state_shutdown(); 47541da177e4SLinus Torvalds nfs4_unlock_state(); 4755c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47561da177e4SLinus Torvalds } 47578b70484cSTigran Mkrtchyan 47588b70484cSTigran Mkrtchyan static void 47598b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47608b70484cSTigran Mkrtchyan { 476137c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 476237c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47638b70484cSTigran Mkrtchyan } 47648b70484cSTigran Mkrtchyan 47658b70484cSTigran Mkrtchyan static void 47668b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47678b70484cSTigran Mkrtchyan { 476837c593c5STigran Mkrtchyan if (cstate->minorversion) { 476937c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 477037c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 477137c593c5STigran Mkrtchyan } 477237c593c5STigran Mkrtchyan } 477337c593c5STigran Mkrtchyan 477437c593c5STigran Mkrtchyan void 477537c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 477637c593c5STigran Mkrtchyan { 477737c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 47788b70484cSTigran Mkrtchyan } 47798b70484cSTigran Mkrtchyan 478062cd4a59STigran Mkrtchyan /* 478162cd4a59STigran Mkrtchyan * functions to set current state id 478262cd4a59STigran Mkrtchyan */ 47838b70484cSTigran Mkrtchyan void 47849428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 47859428fe1aSTigran Mkrtchyan { 47869428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 47879428fe1aSTigran Mkrtchyan } 47889428fe1aSTigran Mkrtchyan 47899428fe1aSTigran Mkrtchyan void 47908b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 47918b70484cSTigran Mkrtchyan { 47928b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 47938b70484cSTigran Mkrtchyan } 47948b70484cSTigran Mkrtchyan 47958b70484cSTigran Mkrtchyan void 479662cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 479762cd4a59STigran Mkrtchyan { 479862cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 479962cd4a59STigran Mkrtchyan } 480062cd4a59STigran Mkrtchyan 480162cd4a59STigran Mkrtchyan void 480262cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 480362cd4a59STigran Mkrtchyan { 480462cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 480562cd4a59STigran Mkrtchyan } 480662cd4a59STigran Mkrtchyan 480762cd4a59STigran Mkrtchyan /* 480862cd4a59STigran Mkrtchyan * functions to consume current state id 480962cd4a59STigran Mkrtchyan */ 48101e97b519STigran Mkrtchyan 48111e97b519STigran Mkrtchyan void 48129428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48139428fe1aSTigran Mkrtchyan { 48149428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48159428fe1aSTigran Mkrtchyan } 48169428fe1aSTigran Mkrtchyan 48179428fe1aSTigran Mkrtchyan void 48189428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48199428fe1aSTigran Mkrtchyan { 48209428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48219428fe1aSTigran Mkrtchyan } 48229428fe1aSTigran Mkrtchyan 48239428fe1aSTigran Mkrtchyan void 48241e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48251e97b519STigran Mkrtchyan { 48261e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48271e97b519STigran Mkrtchyan } 48281e97b519STigran Mkrtchyan 48291e97b519STigran Mkrtchyan void 48301e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48311e97b519STigran Mkrtchyan { 48321e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48331e97b519STigran Mkrtchyan } 48341e97b519STigran Mkrtchyan 483562cd4a59STigran Mkrtchyan void 48368b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48378b70484cSTigran Mkrtchyan { 48388b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48398b70484cSTigran Mkrtchyan } 48408b70484cSTigran Mkrtchyan 48418b70484cSTigran Mkrtchyan void 484262cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48438b70484cSTigran Mkrtchyan { 484462cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48458b70484cSTigran Mkrtchyan } 484630813e27STigran Mkrtchyan 484730813e27STigran Mkrtchyan void 484830813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 484930813e27STigran Mkrtchyan { 485030813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 485130813e27STigran Mkrtchyan } 485230813e27STigran Mkrtchyan 485330813e27STigran Mkrtchyan void 485430813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 485530813e27STigran Mkrtchyan { 485630813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 485730813e27STigran Mkrtchyan } 4858