11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 31da177e4SLinus Torvalds * All rights reserved. 41da177e4SLinus Torvalds * 51da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 61da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 71da177e4SLinus Torvalds * 81da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 91da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 101da177e4SLinus Torvalds * are met: 111da177e4SLinus Torvalds * 121da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 131da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 141da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 161da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 171da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 181da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 191da177e4SLinus Torvalds * from this software without specific prior written permission. 201da177e4SLinus Torvalds * 211da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 221da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 231da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 241da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 251da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 261da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 271da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 281da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 291da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 301da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 311da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 321da177e4SLinus Torvalds * 331da177e4SLinus Torvalds */ 341da177e4SLinus Torvalds 35aceaf78dSDave Hansen #include <linux/file.h> 36b89f4321SArnd Bergmann #include <linux/fs.h> 375a0e3ad6STejun Heo #include <linux/slab.h> 380964a3d3SNeilBrown #include <linux/namei.h> 39c2f1a551SMeelap Shah #include <linux/swap.h> 4017456804SBryan Schumaker #include <linux/pagemap.h> 4168e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 42363168b4SJeff Layton #include <linux/sunrpc/clnt.h> 439a74af21SBoaz Harrosh #include "xdr4.h" 440a3adadeSJ. Bruce Fields #include "vfs.h" 451da177e4SLinus Torvalds 461da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 471da177e4SLinus Torvalds 481da177e4SLinus Torvalds /* Globals */ 49cf07d2eaSJ. Bruce Fields time_t nfsd4_lease = 90; /* default lease time */ 50efc4bb4fSJ. Bruce Fields time_t nfsd4_grace = 90; 51fd39ca9aSNeilBrown static time_t boot_time; 52f32f3c2dSJ. Bruce Fields 53f32f3c2dSJ. Bruce Fields #define all_ones {{~0,~0},~0} 54f32f3c2dSJ. Bruce Fields static const stateid_t one_stateid = { 55f32f3c2dSJ. Bruce Fields .si_generation = ~0, 56f32f3c2dSJ. Bruce Fields .si_opaque = all_ones, 57f32f3c2dSJ. Bruce Fields }; 58f32f3c2dSJ. Bruce Fields static const stateid_t zero_stateid = { 59f32f3c2dSJ. Bruce Fields /* all fields zero */ 60f32f3c2dSJ. Bruce Fields }; 6119ff0f28STigran Mkrtchyan static const stateid_t currentstateid = { 6219ff0f28STigran Mkrtchyan .si_generation = 1, 6319ff0f28STigran Mkrtchyan }; 64f32f3c2dSJ. Bruce Fields 65ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 66fd39ca9aSNeilBrown 67f32f3c2dSJ. Bruce Fields #define ZERO_STATEID(stateid) (!memcmp((stateid), &zero_stateid, sizeof(stateid_t))) 68f32f3c2dSJ. Bruce Fields #define ONE_STATEID(stateid) (!memcmp((stateid), &one_stateid, sizeof(stateid_t))) 6919ff0f28STigran Mkrtchyan #define CURRENT_STATEID(stateid) (!memcmp((stateid), ¤tstateid, sizeof(stateid_t))) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* forward declarations */ 72fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner); 731da177e4SLinus Torvalds 748b671b80SJ. Bruce Fields /* Locking: */ 758b671b80SJ. Bruce Fields 768b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 77353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 781da177e4SLinus Torvalds 798b671b80SJ. Bruce Fields /* 808b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 818b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 828b671b80SJ. Bruce Fields * eventually cover more: 838b671b80SJ. Bruce Fields */ 848b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 858b671b80SJ. Bruce Fields 86fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 87fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 88e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 89e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 91e60d4398SNeilBrown 921da177e4SLinus Torvalds void 931da177e4SLinus Torvalds nfs4_lock_state(void) 941da177e4SLinus Torvalds { 95353ab6e9SIngo Molnar mutex_lock(&client_mutex); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds void 991da177e4SLinus Torvalds nfs4_unlock_state(void) 1001da177e4SLinus Torvalds { 101353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds static inline u32 1051da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds u32 x = 0; 1101da177e4SLinus Torvalds while (nbytes--) { 1111da177e4SLinus Torvalds x *= 37; 1121da177e4SLinus Torvalds x += *cptr++; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds return x; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds static struct list_head del_recall_lru; 1181da177e4SLinus Torvalds 11932513b40SJ. Bruce Fields static void nfsd4_free_file(struct nfs4_file *f) 12032513b40SJ. Bruce Fields { 12132513b40SJ. Bruce Fields kmem_cache_free(file_slab, f); 12232513b40SJ. Bruce Fields } 12332513b40SJ. Bruce Fields 12413cd2184SNeilBrown static inline void 12513cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 12613cd2184SNeilBrown { 1278b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1288b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1298b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1308b671b80SJ. Bruce Fields iput(fi->fi_inode); 13132513b40SJ. Bruce Fields nfsd4_free_file(fi); 1328b671b80SJ. Bruce Fields } 13313cd2184SNeilBrown } 13413cd2184SNeilBrown 13513cd2184SNeilBrown static inline void 13613cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 13713cd2184SNeilBrown { 1388b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 13913cd2184SNeilBrown } 14013cd2184SNeilBrown 141ef0f3390SNeilBrown static int num_delegations; 142c2f1a551SMeelap Shah unsigned int max_delegations; 143ef0f3390SNeilBrown 144ef0f3390SNeilBrown /* 145ef0f3390SNeilBrown * Open owner state (share locks) 146ef0f3390SNeilBrown */ 147ef0f3390SNeilBrown 14816bfdaafSJ. Bruce Fields /* hash tables for lock and open owners */ 14916bfdaafSJ. Bruce Fields #define OWNER_HASH_BITS 8 15016bfdaafSJ. Bruce Fields #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 15116bfdaafSJ. Bruce Fields #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 152ef0f3390SNeilBrown 15316bfdaafSJ. Bruce Fields static unsigned int ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 154ddc04c41SJ. Bruce Fields { 155ddc04c41SJ. Bruce Fields unsigned int ret; 156ddc04c41SJ. Bruce Fields 157ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 158ddc04c41SJ. Bruce Fields ret += clientid; 15916bfdaafSJ. Bruce Fields return ret & OWNER_HASH_MASK; 160ddc04c41SJ. Bruce Fields } 161ef0f3390SNeilBrown 16216bfdaafSJ. Bruce Fields static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 163ef0f3390SNeilBrown 164ef0f3390SNeilBrown /* hash table for nfs4_file */ 165ef0f3390SNeilBrown #define FILE_HASH_BITS 8 166ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 16735079582SShan Wei 168ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 169ddc04c41SJ. Bruce Fields { 170ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 171ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 172ddc04c41SJ. Bruce Fields } 173ddc04c41SJ. Bruce Fields 174ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 175ef0f3390SNeilBrown 176998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 177f9d7562fSJ. Bruce Fields { 178f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 179f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 180f9d7562fSJ. Bruce Fields } 181f9d7562fSJ. Bruce Fields 182998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 183998db52cSJ. Bruce Fields { 184998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 185998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 186998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 187998db52cSJ. Bruce Fields } else 188998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 189998db52cSJ. Bruce Fields } 190998db52cSJ. Bruce Fields 191998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 192f9d7562fSJ. Bruce Fields { 193f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 194f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 195f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 196f9d7562fSJ. Bruce Fields } 197f9d7562fSJ. Bruce Fields } 198f9d7562fSJ. Bruce Fields 199998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 200f9d7562fSJ. Bruce Fields { 201f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 202f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 2033d02fa29SJ. Bruce Fields /* 2043d02fa29SJ. Bruce Fields * It's also safe to get rid of the RDWR open *if* 2053d02fa29SJ. Bruce Fields * we no longer have need of the other kind of access 2063d02fa29SJ. Bruce Fields * or if we already have the other kind of open: 2073d02fa29SJ. Bruce Fields */ 2083d02fa29SJ. Bruce Fields if (fp->fi_fds[1-oflag] 2093d02fa29SJ. Bruce Fields || atomic_read(&fp->fi_access[1 - oflag]) == 0) 2103d02fa29SJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields } 213f9d7562fSJ. Bruce Fields 214998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 215998db52cSJ. Bruce Fields { 216998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 217998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 218998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 219998db52cSJ. Bruce Fields } else 220998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 221998db52cSJ. Bruce Fields } 222998db52cSJ. Bruce Fields 2236136d2b4SJ. Bruce Fields static inline int get_new_stid(struct nfs4_stid *stid) 22436d44c60SJ. Bruce Fields { 2256136d2b4SJ. Bruce Fields static int min_stateid = 0; 22638c2f4b1SJ. Bruce Fields struct idr *stateids = &stid->sc_client->cl_stateids; 2276136d2b4SJ. Bruce Fields int new_stid; 2286136d2b4SJ. Bruce Fields int error; 22936d44c60SJ. Bruce Fields 23038c2f4b1SJ. Bruce Fields error = idr_get_new_above(stateids, stid, min_stateid, &new_stid); 2316136d2b4SJ. Bruce Fields /* 232996e0938SJ. Bruce Fields * Note: the necessary preallocation was done in 233996e0938SJ. Bruce Fields * nfs4_alloc_stateid(). The idr code caps the number of 234996e0938SJ. Bruce Fields * preallocations that can exist at a time, but the state lock 235996e0938SJ. Bruce Fields * prevents anyone from using ours before we get here: 2366136d2b4SJ. Bruce Fields */ 2376136d2b4SJ. Bruce Fields BUG_ON(error); 2386136d2b4SJ. Bruce Fields /* 2396136d2b4SJ. Bruce Fields * It shouldn't be a problem to reuse an opaque stateid value. 2406136d2b4SJ. Bruce Fields * I don't think it is for 4.1. But with 4.0 I worry that, for 2416136d2b4SJ. Bruce Fields * example, a stray write retransmission could be accepted by 2426136d2b4SJ. Bruce Fields * the server when it should have been rejected. Therefore, 2436136d2b4SJ. Bruce Fields * adopt a trick from the sctp code to attempt to maximize the 2446136d2b4SJ. Bruce Fields * amount of time until an id is reused, by ensuring they always 2456136d2b4SJ. Bruce Fields * "increase" (mod INT_MAX): 2466136d2b4SJ. Bruce Fields */ 2476136d2b4SJ. Bruce Fields 2486136d2b4SJ. Bruce Fields min_stateid = new_stid+1; 2496136d2b4SJ. Bruce Fields if (min_stateid == INT_MAX) 2506136d2b4SJ. Bruce Fields min_stateid = 0; 2516136d2b4SJ. Bruce Fields return new_stid; 25236d44c60SJ. Bruce Fields } 25336d44c60SJ. Bruce Fields 254996e0938SJ. Bruce Fields static void init_stid(struct nfs4_stid *stid, struct nfs4_client *cl, unsigned char type) 2552a74aba7SJ. Bruce Fields { 2562a74aba7SJ. Bruce Fields stateid_t *s = &stid->sc_stateid; 2576136d2b4SJ. Bruce Fields int new_id; 2582a74aba7SJ. Bruce Fields 2592a74aba7SJ. Bruce Fields stid->sc_type = type; 2602a74aba7SJ. Bruce Fields stid->sc_client = cl; 2612a74aba7SJ. Bruce Fields s->si_opaque.so_clid = cl->cl_clientid; 2626136d2b4SJ. Bruce Fields new_id = get_new_stid(stid); 2636136d2b4SJ. Bruce Fields s->si_opaque.so_id = (u32)new_id; 2642a74aba7SJ. Bruce Fields /* Will be incremented before return to client: */ 2652a74aba7SJ. Bruce Fields s->si_generation = 0; 266996e0938SJ. Bruce Fields } 267996e0938SJ. Bruce Fields 268996e0938SJ. Bruce Fields static struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab) 269996e0938SJ. Bruce Fields { 270996e0938SJ. Bruce Fields struct idr *stateids = &cl->cl_stateids; 271996e0938SJ. Bruce Fields 272996e0938SJ. Bruce Fields if (!idr_pre_get(stateids, GFP_KERNEL)) 273996e0938SJ. Bruce Fields return NULL; 274996e0938SJ. Bruce Fields /* 275996e0938SJ. Bruce Fields * Note: if we fail here (or any time between now and the time 276996e0938SJ. Bruce Fields * we actually get the new idr), we won't need to undo the idr 277996e0938SJ. Bruce Fields * preallocation, since the idr code caps the number of 278996e0938SJ. Bruce Fields * preallocated entries. 279996e0938SJ. Bruce Fields */ 280996e0938SJ. Bruce Fields return kmem_cache_alloc(slab, GFP_KERNEL); 2812a74aba7SJ. Bruce Fields } 2822a74aba7SJ. Bruce Fields 2834cdc951bSJ. Bruce Fields static struct nfs4_ol_stateid * nfs4_alloc_stateid(struct nfs4_client *clp) 2844cdc951bSJ. Bruce Fields { 2854cdc951bSJ. Bruce Fields return openlockstateid(nfs4_alloc_stid(clp, stateid_slab)); 2864cdc951bSJ. Bruce Fields } 2874cdc951bSJ. Bruce Fields 2881da177e4SLinus Torvalds static struct nfs4_delegation * 289dcef0413SJ. Bruce Fields alloc_init_deleg(struct nfs4_client *clp, struct nfs4_ol_stateid *stp, struct svc_fh *current_fh, u32 type) 2901da177e4SLinus Torvalds { 2911da177e4SLinus Torvalds struct nfs4_delegation *dp; 2921da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2931da177e4SLinus Torvalds 2941da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 295c3e48080SJ. Bruce Fields /* 296c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 297c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 298c3e48080SJ. Bruce Fields * write delegations properly. 299c3e48080SJ. Bruce Fields */ 300c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 301c3e48080SJ. Bruce Fields return NULL; 30247f9940cSMeelap Shah if (fp->fi_had_conflict) 30347f9940cSMeelap Shah return NULL; 304c2f1a551SMeelap Shah if (num_delegations > max_delegations) 305ef0f3390SNeilBrown return NULL; 306996e0938SJ. Bruce Fields dp = delegstateid(nfs4_alloc_stid(clp, deleg_slab)); 3075b2d21c1SNeilBrown if (dp == NULL) 3081da177e4SLinus Torvalds return dp; 309996e0938SJ. Bruce Fields init_stid(&dp->dl_stid, clp, NFS4_DELEG_STID); 3102a74aba7SJ. Bruce Fields /* 3112a74aba7SJ. Bruce Fields * delegation seqid's are never incremented. The 4.1 special 3126136d2b4SJ. Bruce Fields * meaning of seqid 0 isn't meaningful, really, but let's avoid 3136136d2b4SJ. Bruce Fields * 0 anyway just for consistency and use 1: 3142a74aba7SJ. Bruce Fields */ 3152a74aba7SJ. Bruce Fields dp->dl_stid.sc_stateid.si_generation = 1; 316ef0f3390SNeilBrown num_delegations++; 317ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 318ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 3191da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 32013cd2184SNeilBrown get_nfs4_file(fp); 3211da177e4SLinus Torvalds dp->dl_file = fp; 3221da177e4SLinus Torvalds dp->dl_type = type; 3236c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 3241da177e4SLinus Torvalds dp->dl_time = 0; 3251da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 326b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 3271da177e4SLinus Torvalds return dp; 3281da177e4SLinus Torvalds } 3291da177e4SLinus Torvalds 3301da177e4SLinus Torvalds void 3311da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 3321da177e4SLinus Torvalds { 3331da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 3341da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 33513cd2184SNeilBrown put_nfs4_file(dp->dl_file); 3365b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 337ef0f3390SNeilBrown num_delegations--; 3381da177e4SLinus Torvalds } 3391da177e4SLinus Torvalds } 3401da177e4SLinus Torvalds 341acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 3421da177e4SLinus Torvalds { 343acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 344acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 345acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 3464ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 347acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 348acfdf5c3SJ. Bruce Fields } 3491da177e4SLinus Torvalds } 3501da177e4SLinus Torvalds 3516136d2b4SJ. Bruce Fields static void unhash_stid(struct nfs4_stid *s) 3526136d2b4SJ. Bruce Fields { 35338c2f4b1SJ. Bruce Fields struct idr *stateids = &s->sc_client->cl_stateids; 35438c2f4b1SJ. Bruce Fields 35538c2f4b1SJ. Bruce Fields idr_remove(stateids, s->sc_stateid.si_opaque.so_id); 3566136d2b4SJ. Bruce Fields } 3576136d2b4SJ. Bruce Fields 3581da177e4SLinus Torvalds /* Called under the state lock. */ 3591da177e4SLinus Torvalds static void 3601da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 3611da177e4SLinus Torvalds { 3626136d2b4SJ. Bruce Fields unhash_stid(&dp->dl_stid); 363ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3641da177e4SLinus Torvalds spin_lock(&recall_lock); 3655d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 3661da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3671da177e4SLinus Torvalds spin_unlock(&recall_lock); 368acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 3691da177e4SLinus Torvalds nfs4_put_delegation(dp); 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds /* 3731da177e4SLinus Torvalds * SETCLIENTID state 3741da177e4SLinus Torvalds */ 3751da177e4SLinus Torvalds 37636acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3779089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3789089f1b4SBenny Halevy 3791da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3801da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3811da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3821da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3831da177e4SLinus Torvalds 384ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 385ddc04c41SJ. Bruce Fields { 386ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 387ddc04c41SJ. Bruce Fields } 388ddc04c41SJ. Bruce Fields 389ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 390ddc04c41SJ. Bruce Fields { 391ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 392ddc04c41SJ. Bruce Fields } 393ddc04c41SJ. Bruce Fields 3941da177e4SLinus Torvalds /* 3951da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3961da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3971da177e4SLinus Torvalds * 3981da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3991da177e4SLinus Torvalds * setclientid_confirmed info. 4001da177e4SLinus Torvalds * 4011da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 4021da177e4SLinus Torvalds * setclientid info. 4031da177e4SLinus Torvalds * 4041da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 4051da177e4SLinus Torvalds * for lease renewal. 4061da177e4SLinus Torvalds * 4071da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 4081da177e4SLinus Torvalds * for last close replay. 4091da177e4SLinus Torvalds */ 4101da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 4111da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 4121da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 4131da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 4141da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 4151da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 4161da177e4SLinus Torvalds static struct list_head client_lru; 4171da177e4SLinus Torvalds static struct list_head close_lru; 4181da177e4SLinus Torvalds 419f9d7562fSJ. Bruce Fields /* 420f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 421f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 422f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 423f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 424f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 425f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 426f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 427f9d7562fSJ. Bruce Fields * 428f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 429f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 430f9d7562fSJ. Bruce Fields * 431f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 432f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 433f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 434f9d7562fSJ. Bruce Fields * 435f9d7562fSJ. Bruce Fields * which we should reject. 436f9d7562fSJ. Bruce Fields */ 437f9d7562fSJ. Bruce Fields static void 438f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 439f9d7562fSJ. Bruce Fields int i; 440f9d7562fSJ. Bruce Fields 441f9d7562fSJ. Bruce Fields *access = 0; 442f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 443f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 444f9d7562fSJ. Bruce Fields *access |= i; 445f9d7562fSJ. Bruce Fields } 446f9d7562fSJ. Bruce Fields } 447f9d7562fSJ. Bruce Fields 448f9d7562fSJ. Bruce Fields static void 449f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 450f9d7562fSJ. Bruce Fields int i; 451f9d7562fSJ. Bruce Fields 452f9d7562fSJ. Bruce Fields *deny = 0; 453f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 454f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 455f9d7562fSJ. Bruce Fields *deny |= i ; 456f9d7562fSJ. Bruce Fields } 457f9d7562fSJ. Bruce Fields } 458f9d7562fSJ. Bruce Fields 459f9d7562fSJ. Bruce Fields static int 460dcef0413SJ. Bruce Fields test_share(struct nfs4_ol_stateid *stp, struct nfsd4_open *open) { 461f9d7562fSJ. Bruce Fields unsigned int access, deny; 462f9d7562fSJ. Bruce Fields 463f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 464f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 465f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 466f9d7562fSJ. Bruce Fields return 0; 467f9d7562fSJ. Bruce Fields return 1; 468f9d7562fSJ. Bruce Fields } 469f9d7562fSJ. Bruce Fields 470f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 471f9d7562fSJ. Bruce Fields { 4728f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 473f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 474f9d7562fSJ. Bruce Fields return O_RDONLY; 475f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 476f9d7562fSJ. Bruce Fields return O_WRONLY; 477f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 478f9d7562fSJ. Bruce Fields return O_RDWR; 479f9d7562fSJ. Bruce Fields } 480f9d7562fSJ. Bruce Fields BUG(); 481f9d7562fSJ. Bruce Fields } 482f9d7562fSJ. Bruce Fields 483dcef0413SJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_ol_stateid *stp) 484529d7b2aSJ. Bruce Fields { 485529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 486529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 487529d7b2aSJ. Bruce Fields } 488529d7b2aSJ. Bruce Fields 489dcef0413SJ. Bruce Fields static void close_generic_stateid(struct nfs4_ol_stateid *stp) 490529d7b2aSJ. Bruce Fields { 491499f3edcSJ. Bruce Fields int i; 4920997b173SJ. Bruce Fields 49323fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 494499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 495499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 496499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 497499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 4984665e2baSJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 499499f3edcSJ. Bruce Fields } 50023fcf2ecSJ. Bruce Fields } 501a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 5024665e2baSJ. Bruce Fields stp->st_file = NULL; 5034665e2baSJ. Bruce Fields } 5044665e2baSJ. Bruce Fields 505dcef0413SJ. Bruce Fields static void free_generic_stateid(struct nfs4_ol_stateid *stp) 5064665e2baSJ. Bruce Fields { 507529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 508529d7b2aSJ. Bruce Fields } 509529d7b2aSJ. Bruce Fields 510dcef0413SJ. Bruce Fields static void release_lock_stateid(struct nfs4_ol_stateid *stp) 511529d7b2aSJ. Bruce Fields { 512529d7b2aSJ. Bruce Fields struct file *file; 513529d7b2aSJ. Bruce Fields 514529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 5156136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 516529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 517529d7b2aSJ. Bruce Fields if (file) 518fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 51938c387b5SJ. Bruce Fields close_generic_stateid(stp); 520529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 521529d7b2aSJ. Bruce Fields } 522529d7b2aSJ. Bruce Fields 523fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 524529d7b2aSJ. Bruce Fields { 525dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 526529d7b2aSJ. Bruce Fields 527fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 528fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 529009673b4SJ. Bruce Fields list_del(&lo->lo_owner_ino_hash); 530fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 531fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 532dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 533529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 534529d7b2aSJ. Bruce Fields } 535529d7b2aSJ. Bruce Fields } 536529d7b2aSJ. Bruce Fields 537fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 538529d7b2aSJ. Bruce Fields { 539fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 540fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 541529d7b2aSJ. Bruce Fields } 542529d7b2aSJ. Bruce Fields 543529d7b2aSJ. Bruce Fields static void 544dcef0413SJ. Bruce Fields release_stateid_lockowners(struct nfs4_ol_stateid *open_stp) 545529d7b2aSJ. Bruce Fields { 546fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 547529d7b2aSJ. Bruce Fields 548529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 549fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 550fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 551fe0750e5SJ. Bruce Fields release_lockowner(lo); 552529d7b2aSJ. Bruce Fields } 553529d7b2aSJ. Bruce Fields } 554529d7b2aSJ. Bruce Fields 55538c387b5SJ. Bruce Fields static void unhash_open_stateid(struct nfs4_ol_stateid *stp) 5562283963fSJ. Bruce Fields { 5572283963fSJ. Bruce Fields unhash_generic_stateid(stp); 5582283963fSJ. Bruce Fields release_stateid_lockowners(stp); 55938c387b5SJ. Bruce Fields close_generic_stateid(stp); 56038c387b5SJ. Bruce Fields } 56138c387b5SJ. Bruce Fields 56238c387b5SJ. Bruce Fields static void release_open_stateid(struct nfs4_ol_stateid *stp) 56338c387b5SJ. Bruce Fields { 56438c387b5SJ. Bruce Fields unhash_open_stateid(stp); 5656136d2b4SJ. Bruce Fields unhash_stid(&stp->st_stid); 5662283963fSJ. Bruce Fields free_generic_stateid(stp); 5672283963fSJ. Bruce Fields } 5682283963fSJ. Bruce Fields 569fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 570f1d110caSJ. Bruce Fields { 571dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 572f1d110caSJ. Bruce Fields 573fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 574fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 575fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 576fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 577dcef0413SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 578f1d110caSJ. Bruce Fields release_open_stateid(stp); 579f1d110caSJ. Bruce Fields } 580f1d110caSJ. Bruce Fields } 581f1d110caSJ. Bruce Fields 582f7a4d872SJ. Bruce Fields static void release_last_closed_stateid(struct nfs4_openowner *oo) 583f7a4d872SJ. Bruce Fields { 584f7a4d872SJ. Bruce Fields struct nfs4_ol_stateid *s = oo->oo_last_closed_stid; 585f7a4d872SJ. Bruce Fields 586f7a4d872SJ. Bruce Fields if (s) { 5876136d2b4SJ. Bruce Fields unhash_stid(&s->st_stid); 588f7a4d872SJ. Bruce Fields free_generic_stateid(s); 589f7a4d872SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 590f7a4d872SJ. Bruce Fields } 591f7a4d872SJ. Bruce Fields } 592f7a4d872SJ. Bruce Fields 593fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 594f1d110caSJ. Bruce Fields { 595fe0750e5SJ. Bruce Fields unhash_openowner(oo); 596fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 597f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 598fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 599f1d110caSJ. Bruce Fields } 600f1d110caSJ. Bruce Fields 6015282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 6025282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 6035282fd72SMarc Eshel 6045282fd72SMarc Eshel static inline int 6055282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 6065282fd72SMarc Eshel { 6075282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 6085282fd72SMarc Eshel 6095282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 6105282fd72SMarc Eshel } 6115282fd72SMarc Eshel 6125282fd72SMarc Eshel static inline void 6135282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 6145282fd72SMarc Eshel { 6155282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 6165282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 6175282fd72SMarc Eshel } 6185282fd72SMarc Eshel 619ec6b5d7bSAndy Adamson static void 620ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 621ec6b5d7bSAndy Adamson { 622ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 623ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 624ec6b5d7bSAndy Adamson 625ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 626ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 627ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 628ec6b5d7bSAndy Adamson sid->reserved = 0; 629ec6b5d7bSAndy Adamson } 630ec6b5d7bSAndy Adamson 631ec6b5d7bSAndy Adamson /* 632a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 633a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 634a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 635a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 636a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 637a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 638a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 639a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 640a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 641a649637cSAndy Adamson * for the SEQUENCE op response: 642ec6b5d7bSAndy Adamson */ 643a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 644a649637cSAndy Adamson 645557ce264SAndy Adamson static void 646557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 647557ce264SAndy Adamson { 648557ce264SAndy Adamson int i; 649557ce264SAndy Adamson 650557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 651557ce264SAndy Adamson kfree(ses->se_slots[i]); 652557ce264SAndy Adamson } 653557ce264SAndy Adamson 654efe0cb6dSJ. Bruce Fields /* 655efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 656efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 657efe0cb6dSJ. Bruce Fields */ 658efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 659efe0cb6dSJ. Bruce Fields { 660efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 661efe0cb6dSJ. Bruce Fields } 662efe0cb6dSJ. Bruce Fields 6635b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 664ec6b5d7bSAndy Adamson { 6655b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 6665b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 667ec6b5d7bSAndy Adamson 6685b6feee9SJ. Bruce Fields return size; 669557ce264SAndy Adamson } 670557ce264SAndy Adamson 6715b6feee9SJ. Bruce Fields /* 6725b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 6735b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 67442b2aa86SJustin P. Mattock * room for new connections. For now we just fail the create session. 6755b6feee9SJ. Bruce Fields */ 6765b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 6775b6feee9SJ. Bruce Fields { 6785b6feee9SJ. Bruce Fields int avail; 6795b6feee9SJ. Bruce Fields 6805b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 6815b6feee9SJ. Bruce Fields 6825b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6835b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 6845b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 6855b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 6865b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 6875b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 6885b6feee9SJ. Bruce Fields 6895b6feee9SJ. Bruce Fields return num; 6905b6feee9SJ. Bruce Fields } 6915b6feee9SJ. Bruce Fields 6925b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 6935b6feee9SJ. Bruce Fields { 6945b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6955b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 6965b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 6975b6feee9SJ. Bruce Fields } 6985b6feee9SJ. Bruce Fields 6995b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 7005b6feee9SJ. Bruce Fields { 7015b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7025b6feee9SJ. Bruce Fields int mem, i; 703ec6b5d7bSAndy Adamson 704c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 705ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 7065b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 707ec6b5d7bSAndy Adamson 7085b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 7096c18ba9fSAlexandros Batsakis if (!new) 7105b6feee9SJ. Bruce Fields return NULL; 711ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 7125b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 7135b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 7145b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 7155b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 716ec6b5d7bSAndy Adamson goto out_free; 717ec6b5d7bSAndy Adamson } 7185b6feee9SJ. Bruce Fields return new; 7195b6feee9SJ. Bruce Fields out_free: 7205b6feee9SJ. Bruce Fields while (i--) 7215b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 7225b6feee9SJ. Bruce Fields kfree(new); 7235b6feee9SJ. Bruce Fields return NULL; 7245b6feee9SJ. Bruce Fields } 7255b6feee9SJ. Bruce Fields 7265b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 7275b6feee9SJ. Bruce Fields { 7285b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 7295b6feee9SJ. Bruce Fields 7305b6feee9SJ. Bruce Fields new->maxreqs = numslots; 731d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 732d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 7335b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 7345b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 7355b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 7365b6feee9SJ. Bruce Fields } 7375b6feee9SJ. Bruce Fields 73819cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 73919cf5c02SJ. Bruce Fields { 74019cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 74119cf5c02SJ. Bruce Fields kfree(c); 74219cf5c02SJ. Bruce Fields } 74319cf5c02SJ. Bruce Fields 74419cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 74519cf5c02SJ. Bruce Fields { 74619cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 74719cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 74819cf5c02SJ. Bruce Fields 74919cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 75019cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 75119cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 75219cf5c02SJ. Bruce Fields free_conn(c); 75319cf5c02SJ. Bruce Fields } 75419cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 755eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 75619cf5c02SJ. Bruce Fields } 75719cf5c02SJ. Bruce Fields 758d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 759c7662518SJ. Bruce Fields { 760c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 761c7662518SJ. Bruce Fields 762c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 763c7662518SJ. Bruce Fields if (!conn) 764db90681dSJ. Bruce Fields return NULL; 765c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 766c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 767d29c374cSJ. Bruce Fields conn->cn_flags = flags; 768db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 769db90681dSJ. Bruce Fields return conn; 770db90681dSJ. Bruce Fields } 771db90681dSJ. Bruce Fields 772328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 773328ead28SJ. Bruce Fields { 774328ead28SJ. Bruce Fields conn->cn_session = ses; 775328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 776328ead28SJ. Bruce Fields } 777328ead28SJ. Bruce Fields 778db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 779db90681dSJ. Bruce Fields { 780db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 781c7662518SJ. Bruce Fields 782c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 783328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 784c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 785db90681dSJ. Bruce Fields } 786c7662518SJ. Bruce Fields 78721b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 788db90681dSJ. Bruce Fields { 78919cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 79021b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 791db90681dSJ. Bruce Fields } 792db90681dSJ. Bruce Fields 7931d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 794db90681dSJ. Bruce Fields { 795db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 79621b75b01SJ. Bruce Fields int ret; 797db90681dSJ. Bruce Fields 7981d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 799db90681dSJ. Bruce Fields if (!conn) 800db90681dSJ. Bruce Fields return nfserr_jukebox; 801db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 80221b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 80321b75b01SJ. Bruce Fields if (ret) 80421b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 80521b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 806c7662518SJ. Bruce Fields return nfs_ok; 807c7662518SJ. Bruce Fields } 808c7662518SJ. Bruce Fields 8091d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 8101d1bc8f2SJ. Bruce Fields { 8111d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 8121d1bc8f2SJ. Bruce Fields 8131d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 8141d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 8151d1bc8f2SJ. Bruce Fields 8161d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 8171d1bc8f2SJ. Bruce Fields } 8181d1bc8f2SJ. Bruce Fields 8191d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 82019cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 821c7662518SJ. Bruce Fields { 82219cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 82319cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 82419cf5c02SJ. Bruce Fields 82519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 82619cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 82719cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 82819cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 82919cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 83019cf5c02SJ. Bruce Fields 83119cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 83219cf5c02SJ. Bruce Fields free_conn(c); 83319cf5c02SJ. Bruce Fields 83419cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 83519cf5c02SJ. Bruce Fields } 83619cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 837c7662518SJ. Bruce Fields } 838c7662518SJ. Bruce Fields 839c7662518SJ. Bruce Fields void free_session(struct kref *kref) 840c7662518SJ. Bruce Fields { 841c7662518SJ. Bruce Fields struct nfsd4_session *ses; 842c7662518SJ. Bruce Fields int mem; 843c7662518SJ. Bruce Fields 844c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 84519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 846c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 847c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 848c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 849c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 850c7662518SJ. Bruce Fields free_session_slots(ses); 851c7662518SJ. Bruce Fields kfree(ses); 852c7662518SJ. Bruce Fields } 853c7662518SJ. Bruce Fields 854ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 8555b6feee9SJ. Bruce Fields { 8565b6feee9SJ. Bruce Fields struct nfsd4_session *new; 8575b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 8585b6feee9SJ. Bruce Fields int numslots, slotsize; 859c7662518SJ. Bruce Fields int status; 8605b6feee9SJ. Bruce Fields int idx; 8615b6feee9SJ. Bruce Fields 8625b6feee9SJ. Bruce Fields /* 8635b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 8645b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 8655b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 8665b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 8675b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 8685b6feee9SJ. Bruce Fields */ 8695b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 8705b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 871ced6dfe9SMi Jinlong if (numslots < 1) 872ced6dfe9SMi Jinlong return NULL; 8735b6feee9SJ. Bruce Fields 8745b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 8755b6feee9SJ. Bruce Fields if (!new) { 8765b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 877ac7c46f2SJ. Bruce Fields return NULL; 8785b6feee9SJ. Bruce Fields } 8795b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 880ec6b5d7bSAndy Adamson 881ec6b5d7bSAndy Adamson new->se_client = clp; 882ec6b5d7bSAndy Adamson gen_sessionid(new); 883ec6b5d7bSAndy Adamson 884c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 885c7662518SJ. Bruce Fields 886ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 887ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 8888b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 889ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 8905b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 8919089f1b4SBenny Halevy spin_lock(&client_lock); 892ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 8934c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 894ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 8954c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 8969089f1b4SBenny Halevy spin_unlock(&client_lock); 897ec6b5d7bSAndy Adamson 8981d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 899ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 900c7662518SJ. Bruce Fields if (status) { 901c7662518SJ. Bruce Fields free_session(&new->se_ref); 902ac7c46f2SJ. Bruce Fields return NULL; 903c7662518SJ. Bruce Fields } 904dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 905edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 906dcbeaa68SJ. Bruce Fields /* 907dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 908dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 909dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 910dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 911dcbeaa68SJ. Bruce Fields * future: 912dcbeaa68SJ. Bruce Fields */ 913edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 914edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 915edd76786SJ. Bruce Fields } 916dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 917ac7c46f2SJ. Bruce Fields return new; 918ec6b5d7bSAndy Adamson } 919ec6b5d7bSAndy Adamson 9209089f1b4SBenny Halevy /* caller must hold client_lock */ 9215282fd72SMarc Eshel static struct nfsd4_session * 9225282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 9235282fd72SMarc Eshel { 9245282fd72SMarc Eshel struct nfsd4_session *elem; 9255282fd72SMarc Eshel int idx; 9265282fd72SMarc Eshel 9275282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 9285282fd72SMarc Eshel idx = hash_sessionid(sessionid); 9295282fd72SMarc Eshel /* Search in the appropriate list */ 9305282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 9315282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 9325282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 9335282fd72SMarc Eshel return elem; 9345282fd72SMarc Eshel } 9355282fd72SMarc Eshel } 9365282fd72SMarc Eshel 9375282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 9385282fd72SMarc Eshel return NULL; 9395282fd72SMarc Eshel } 9405282fd72SMarc Eshel 9419089f1b4SBenny Halevy /* caller must hold client_lock */ 9427116ed6bSAndy Adamson static void 9435282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 9447116ed6bSAndy Adamson { 9457116ed6bSAndy Adamson list_del(&ses->se_hash); 9464c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 9477116ed6bSAndy Adamson list_del(&ses->se_perclnt); 9484c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 9495282fd72SMarc Eshel } 9505282fd72SMarc Eshel 95136acb66bSBenny Halevy /* must be called under the client_lock */ 9521da177e4SLinus Torvalds static inline void 95336acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 9541da177e4SLinus Torvalds { 95507cd4909SBenny Halevy if (is_client_expired(clp)) { 95607cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 95707cd4909SBenny Halevy __func__, 95807cd4909SBenny Halevy clp->cl_clientid.cl_boot, 95907cd4909SBenny Halevy clp->cl_clientid.cl_id); 96007cd4909SBenny Halevy return; 96107cd4909SBenny Halevy } 96207cd4909SBenny Halevy 9631da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 9641da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 9651da177e4SLinus Torvalds clp->cl_clientid.cl_id); 9661da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 9671da177e4SLinus Torvalds clp->cl_time = get_seconds(); 9681da177e4SLinus Torvalds } 9691da177e4SLinus Torvalds 97036acb66bSBenny Halevy static inline void 97136acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 97236acb66bSBenny Halevy { 97336acb66bSBenny Halevy spin_lock(&client_lock); 97436acb66bSBenny Halevy renew_client_locked(clp); 97536acb66bSBenny Halevy spin_unlock(&client_lock); 97636acb66bSBenny Halevy } 97736acb66bSBenny Halevy 9781da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 9791da177e4SLinus Torvalds static int 9801da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 9811da177e4SLinus Torvalds { 9821da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 9831da177e4SLinus Torvalds return 0; 98460adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 98560adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 9861da177e4SLinus Torvalds return 1; 9871da177e4SLinus Torvalds } 9881da177e4SLinus Torvalds 9891da177e4SLinus Torvalds /* 9901da177e4SLinus Torvalds * XXX Should we use a slab cache ? 9911da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 9921da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 9931da177e4SLinus Torvalds */ 99435bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 9951da177e4SLinus Torvalds { 9961da177e4SLinus Torvalds struct nfs4_client *clp; 9971da177e4SLinus Torvalds 99835bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 99935bba9a3SJ. Bruce Fields if (clp == NULL) 100035bba9a3SJ. Bruce Fields return NULL; 100167114fe6SThomas Meyer clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL); 100235bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 100335bba9a3SJ. Bruce Fields kfree(clp); 100435bba9a3SJ. Bruce Fields return NULL; 100535bba9a3SJ. Bruce Fields } 10061da177e4SLinus Torvalds clp->cl_name.len = name.len; 10071da177e4SLinus Torvalds return clp; 10081da177e4SLinus Torvalds } 10091da177e4SLinus Torvalds 10101da177e4SLinus Torvalds static inline void 10111da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 10121da177e4SLinus Torvalds { 1013792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 1014792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1015792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 1016792c95ddSJ. Bruce Fields se_perclnt); 1017792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 1018792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 1019792c95ddSJ. Bruce Fields } 10201da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 10211da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 102268e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 10231da177e4SLinus Torvalds kfree(clp->cl_name.data); 10241da177e4SLinus Torvalds kfree(clp); 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 1027d7682988SBenny Halevy void 1028d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 1029d7682988SBenny Halevy { 1030d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 1031d7682988SBenny Halevy 1032d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 1033d7682988SBenny Halevy return; 1034d7682988SBenny Halevy if (is_client_expired(clp)) { 1035d7682988SBenny Halevy free_client(clp); 1036d7682988SBenny Halevy session->se_client = NULL; 1037d7682988SBenny Halevy } else 1038d7682988SBenny Halevy renew_client_locked(clp); 1039d7682988SBenny Halevy spin_unlock(&client_lock); 1040d7682988SBenny Halevy } 1041d7682988SBenny Halevy 104284d38ac9SBenny Halevy /* must be called under the client_lock */ 104384d38ac9SBenny Halevy static inline void 104484d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 104584d38ac9SBenny Halevy { 1046792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 1047792c95ddSJ. Bruce Fields 104807cd4909SBenny Halevy mark_client_expired(clp); 104984d38ac9SBenny Halevy list_del(&clp->cl_lru); 10504c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 1051792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 1052792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 10534c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 105484d38ac9SBenny Halevy } 105584d38ac9SBenny Halevy 10561da177e4SLinus Torvalds static void 10571da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 10581da177e4SLinus Torvalds { 1059fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 10601da177e4SLinus Torvalds struct nfs4_delegation *dp; 10611da177e4SLinus Torvalds struct list_head reaplist; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 10641da177e4SLinus Torvalds spin_lock(&recall_lock); 1065ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 1066ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 1067ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 10681da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds spin_unlock(&recall_lock); 10711da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 10721da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 10731da177e4SLinus Torvalds unhash_delegation(dp); 10741da177e4SLinus Torvalds } 1075ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 1076fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 1077fe0750e5SJ. Bruce Fields release_openowner(oo); 10781da177e4SLinus Torvalds } 10796ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 10802bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 10812bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 108284d38ac9SBenny Halevy list_del(&clp->cl_idhash); 108384d38ac9SBenny Halevy list_del(&clp->cl_strhash); 108484d38ac9SBenny Halevy spin_lock(&client_lock); 108584d38ac9SBenny Halevy unhash_client_locked(clp); 108646583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 1087b12a05cbSJ. Bruce Fields free_client(clp); 108846583e25SBenny Halevy spin_unlock(&client_lock); 10891da177e4SLinus Torvalds } 10901da177e4SLinus Torvalds 109135bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 109235bba9a3SJ. Bruce Fields { 109335bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 109435bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 10951da177e4SLinus Torvalds } 10961da177e4SLinus Torvalds 109735bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 109835bba9a3SJ. Bruce Fields { 10991da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 11001da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 11011da177e4SLinus Torvalds } 11021da177e4SLinus Torvalds 110335bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 110435bba9a3SJ. Bruce Fields { 11051da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 11061da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 11071da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 11081da177e4SLinus Torvalds get_group_info(target->cr_group_info); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds 111135bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1112599e0a22SJ. Bruce Fields { 1113a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 11141da177e4SLinus Torvalds } 11151da177e4SLinus Torvalds 11161da177e4SLinus Torvalds static int 1117599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1118599e0a22SJ. Bruce Fields { 1119599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 11201da177e4SLinus Torvalds } 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds static int 1123599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1124599e0a22SJ. Bruce Fields { 1125599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 11261da177e4SLinus Torvalds } 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds /* XXX what about NGROUP */ 11291da177e4SLinus Torvalds static int 1130599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1131599e0a22SJ. Bruce Fields { 1132599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11355ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 11365ec7b46cSJ. Bruce Fields { 11375ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 11385ec7b46cSJ. Bruce Fields 11391da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 11401da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 1143deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1144deda2faaSJ. Bruce Fields { 1145deda2faaSJ. Bruce Fields static u32 i; 11461da177e4SLinus Torvalds u32 *p; 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1149deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1150deda2faaSJ. Bruce Fields *p++ = i++; 11511da177e4SLinus Torvalds } 11521da177e4SLinus Torvalds 115338c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid(struct nfs4_client *cl, stateid_t *t) 11544581d140SJ. Bruce Fields { 115538c2f4b1SJ. Bruce Fields return idr_find(&cl->cl_stateids, t->si_opaque.so_id); 11564581d140SJ. Bruce Fields } 11574d71ab87SJ. Bruce Fields 115838c2f4b1SJ. Bruce Fields static struct nfs4_stid *find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask) 1159f459e453SJ. Bruce Fields { 1160f459e453SJ. Bruce Fields struct nfs4_stid *s; 1161f459e453SJ. Bruce Fields 116238c2f4b1SJ. Bruce Fields s = find_stateid(cl, t); 1163f459e453SJ. Bruce Fields if (!s) 1164f459e453SJ. Bruce Fields return NULL; 1165f459e453SJ. Bruce Fields if (typemask & s->sc_type) 11664d71ab87SJ. Bruce Fields return s; 11674581d140SJ. Bruce Fields return NULL; 11684581d140SJ. Bruce Fields } 11694581d140SJ. Bruce Fields 1170b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1171b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1172b09333c4SRicardo Labiaga { 1173b09333c4SRicardo Labiaga struct nfs4_client *clp; 1174b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1175b09333c4SRicardo Labiaga char *princ; 1176b09333c4SRicardo Labiaga 1177b09333c4SRicardo Labiaga clp = alloc_client(name); 1178b09333c4SRicardo Labiaga if (clp == NULL) 1179b09333c4SRicardo Labiaga return NULL; 1180b09333c4SRicardo Labiaga 1181792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1182792c95ddSJ. Bruce Fields 1183b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1184b09333c4SRicardo Labiaga if (princ) { 1185b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1186b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1187b09333c4SRicardo Labiaga free_client(clp); 1188b09333c4SRicardo Labiaga return NULL; 1189b09333c4SRicardo Labiaga } 1190b09333c4SRicardo Labiaga } 1191b09333c4SRicardo Labiaga 119238c2f4b1SJ. Bruce Fields idr_init(&clp->cl_stateids); 1193b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 119446583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 119577a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1196b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1197b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1198b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1199b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1200b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 12015ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 12026ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1203cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 120407cd4909SBenny Halevy clp->cl_time = get_seconds(); 1205b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1206b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1207b09333c4SRicardo Labiaga copy_verf(clp, verf); 1208b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1209b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1210b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1211b09333c4SRicardo Labiaga gen_confirm(clp); 1212edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1213b09333c4SRicardo Labiaga return clp; 1214b09333c4SRicardo Labiaga } 1215b09333c4SRicardo Labiaga 1216fd39ca9aSNeilBrown static void 12171da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 12181da177e4SLinus Torvalds { 12191da177e4SLinus Torvalds unsigned int idhashval; 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 12221da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12231da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 122436acb66bSBenny Halevy renew_client(clp); 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 1227fd39ca9aSNeilBrown static void 12281da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 12291da177e4SLinus Torvalds { 12301da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 12311da177e4SLinus Torvalds unsigned int strhashval; 12321da177e4SLinus Torvalds 12331da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1234f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1235a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1236328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 12371da177e4SLinus Torvalds renew_client(clp); 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds static struct nfs4_client * 12411da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 12421da177e4SLinus Torvalds { 12431da177e4SLinus Torvalds struct nfs4_client *clp; 12441da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12451da177e4SLinus Torvalds 12461da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1247a50d2ad1SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) { 1248a50d2ad1SJ. Bruce Fields renew_client(clp); 12491da177e4SLinus Torvalds return clp; 12501da177e4SLinus Torvalds } 1251a50d2ad1SJ. Bruce Fields } 12521da177e4SLinus Torvalds return NULL; 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds static struct nfs4_client * 12561da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 12571da177e4SLinus Torvalds { 12581da177e4SLinus Torvalds struct nfs4_client *clp; 12591da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1262599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 12631da177e4SLinus Torvalds return clp; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds return NULL; 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 12686e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1269a1bcecd2SAndy Adamson { 12706e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1271a1bcecd2SAndy Adamson } 1272a1bcecd2SAndy Adamson 127328ce6054SNeilBrown static struct nfs4_client * 1274e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 127528ce6054SNeilBrown { 127628ce6054SNeilBrown struct nfs4_client *clp; 127728ce6054SNeilBrown 127828ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1279e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 128028ce6054SNeilBrown return clp; 128128ce6054SNeilBrown } 128228ce6054SNeilBrown return NULL; 128328ce6054SNeilBrown } 128428ce6054SNeilBrown 128528ce6054SNeilBrown static struct nfs4_client * 1286e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 128728ce6054SNeilBrown { 128828ce6054SNeilBrown struct nfs4_client *clp; 128928ce6054SNeilBrown 129028ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1291e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 129228ce6054SNeilBrown return clp; 129328ce6054SNeilBrown } 129428ce6054SNeilBrown return NULL; 129528ce6054SNeilBrown } 129628ce6054SNeilBrown 1297fd39ca9aSNeilBrown static void 12986f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 12991da177e4SLinus Torvalds { 130007263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 13016f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 13026f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 13037077ecbaSJeff Layton unsigned short expected_family; 13041da177e4SLinus Torvalds 13057077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 13067077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 13077077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 13087077ecbaSJeff Layton expected_family = AF_INET; 13097077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 13107077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 13117077ecbaSJeff Layton expected_family = AF_INET6; 13127077ecbaSJeff Layton else 13131da177e4SLinus Torvalds goto out_err; 13141da177e4SLinus Torvalds 131507263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1316aa9a4ec7SJeff Layton se->se_callback_addr_len, 131707263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 131807263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1319aa9a4ec7SJeff Layton 132007263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 13211da177e4SLinus Torvalds goto out_err; 1322aa9a4ec7SJeff Layton 132307263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 132407263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1325fbf4665fSJeff Layton 132607263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 132707263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 1328849a1cf1SMi Jinlong memcpy(&conn->cb_saddr, &rqstp->rq_daddr, rqstp->rq_daddrlen); 13291da177e4SLinus Torvalds return; 13301da177e4SLinus Torvalds out_err: 133107263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 133207263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1333849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 13341da177e4SLinus Torvalds "will not receive delegations\n", 13351da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds return; 13381da177e4SLinus Torvalds } 13391da177e4SLinus Torvalds 1340074fe897SAndy Adamson /* 1341557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1342074fe897SAndy Adamson */ 1343074fe897SAndy Adamson void 1344074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1345074fe897SAndy Adamson { 1346557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1347557ce264SAndy Adamson unsigned int base; 1348074fe897SAndy Adamson 1349557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1350074fe897SAndy Adamson 1351557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1352557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1353bf864a31SAndy Adamson 1354bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INITIALIZED; 1355bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1356557ce264SAndy Adamson slot->sl_datalen = 0; 1357bf864a31SAndy Adamson return; 1358bf864a31SAndy Adamson } 1359557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1360557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1361557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1362557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1363557ce264SAndy Adamson slot->sl_datalen)) 1364557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1365557ce264SAndy Adamson return; 1366074fe897SAndy Adamson } 1367074fe897SAndy Adamson 1368074fe897SAndy Adamson /* 1369abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1370abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1371abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1372abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1373abfabf8cSAndy Adamson * 1374074fe897SAndy Adamson */ 1375abfabf8cSAndy Adamson static __be32 1376abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1377abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1378074fe897SAndy Adamson { 1379abfabf8cSAndy Adamson struct nfsd4_op *op; 1380abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1381074fe897SAndy Adamson 1382abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1383abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1384abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1385abfabf8cSAndy Adamson 1386abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 138773e79482SJ. Bruce Fields if (args->opcnt > 1 && !(slot->sl_flags & NFSD4_SLOT_CACHETHIS)) { 1388abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1389abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1390abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1391074fe897SAndy Adamson } 1392abfabf8cSAndy Adamson return op->status; 1393074fe897SAndy Adamson } 1394074fe897SAndy Adamson 1395074fe897SAndy Adamson /* 1396557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1397557ce264SAndy Adamson * session values. 1398074fe897SAndy Adamson */ 1399074fe897SAndy Adamson __be32 1400bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1401bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1402074fe897SAndy Adamson { 1403557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1404074fe897SAndy Adamson __be32 status; 1405074fe897SAndy Adamson 1406557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1407074fe897SAndy Adamson 1408abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1409abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1410abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1411abfabf8cSAndy Adamson return status; 1412074fe897SAndy Adamson 1413557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1414557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1415074fe897SAndy Adamson 1416557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1417557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1418557ce264SAndy Adamson status = slot->sl_status; 1419074fe897SAndy Adamson 1420074fe897SAndy Adamson return status; 1421074fe897SAndy Adamson } 1422074fe897SAndy Adamson 14230733d213SAndy Adamson /* 14240733d213SAndy Adamson * Set the exchange_id flags returned by the server. 14250733d213SAndy Adamson */ 14260733d213SAndy Adamson static void 14270733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 14280733d213SAndy Adamson { 14290733d213SAndy Adamson /* pNFS is not supported */ 14300733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 14310733d213SAndy Adamson 14320733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 14330733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 14340733d213SAndy Adamson 14350733d213SAndy Adamson /* set the wire flags to return to client. */ 14360733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 14370733d213SAndy Adamson } 14380733d213SAndy Adamson 1439b37ad28bSAl Viro __be32 1440069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1441069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1442069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1443069b6ad4SAndy Adamson { 14440733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 14450733d213SAndy Adamson int status; 14460733d213SAndy Adamson unsigned int strhashval; 14470733d213SAndy Adamson char dname[HEXDIR_LEN]; 1448363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 14490733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1450363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 14510733d213SAndy Adamson 1452363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 14530733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1454363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 14550733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1456363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 14570733d213SAndy Adamson 1458a084daf5SJ. Bruce Fields if (exid->flags & ~EXCHGID4_FLAG_MASK_A) 14590733d213SAndy Adamson return nfserr_inval; 14600733d213SAndy Adamson 14610733d213SAndy Adamson /* Currently only support SP4_NONE */ 14620733d213SAndy Adamson switch (exid->spa_how) { 14630733d213SAndy Adamson case SP4_NONE: 14640733d213SAndy Adamson break; 14650733d213SAndy Adamson case SP4_SSV: 1466044bc1d4SJ. Bruce Fields return nfserr_serverfault; 14670733d213SAndy Adamson default: 14680733d213SAndy Adamson BUG(); /* checked by xdr code */ 14690733d213SAndy Adamson case SP4_MACH_CRED: 14700733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 14710733d213SAndy Adamson } 14720733d213SAndy Adamson 14730733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 14740733d213SAndy Adamson 14750733d213SAndy Adamson if (status) 14760733d213SAndy Adamson goto error; 14770733d213SAndy Adamson 14780733d213SAndy Adamson strhashval = clientstr_hashval(dname); 14790733d213SAndy Adamson 14800733d213SAndy Adamson nfs4_lock_state(); 14810733d213SAndy Adamson status = nfs_ok; 14820733d213SAndy Adamson 1483e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 14840733d213SAndy Adamson if (conf) { 1485e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1486e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1487e203d506SJ. Bruce Fields goto out; 1488e203d506SJ. Bruce Fields } 14890733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 14900733d213SAndy Adamson /* 18.35.4 case 8 */ 14910733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14920733d213SAndy Adamson status = nfserr_not_same; 14930733d213SAndy Adamson goto out; 14940733d213SAndy Adamson } 14950733d213SAndy Adamson /* Client reboot: destroy old state */ 14960733d213SAndy Adamson expire_client(conf); 14970733d213SAndy Adamson goto out_new; 14980733d213SAndy Adamson } 14990733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 15000733d213SAndy Adamson /* 18.35.4 case 9 */ 15010733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15020733d213SAndy Adamson status = nfserr_perm; 15030733d213SAndy Adamson goto out; 15040733d213SAndy Adamson } 15050733d213SAndy Adamson expire_client(conf); 15060733d213SAndy Adamson goto out_new; 15070733d213SAndy Adamson } 15080733d213SAndy Adamson /* 15090733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 15100733d213SAndy Adamson * confirmed client id (18.35.3). 15110733d213SAndy Adamson */ 15120733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 15130733d213SAndy Adamson 15140733d213SAndy Adamson /* 15150733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 15160733d213SAndy Adamson * Leave confirmed record intact and return same result. 15170733d213SAndy Adamson */ 15180733d213SAndy Adamson copy_verf(conf, &verf); 15190733d213SAndy Adamson new = conf; 15200733d213SAndy Adamson goto out_copy; 15216ddbbbfeSMike Sager } 15226ddbbbfeSMike Sager 15230733d213SAndy Adamson /* 18.35.4 case 7 */ 15240733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 15250733d213SAndy Adamson status = nfserr_noent; 15260733d213SAndy Adamson goto out; 15270733d213SAndy Adamson } 15280733d213SAndy Adamson 1529e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 15300733d213SAndy Adamson if (unconf) { 15310733d213SAndy Adamson /* 15320733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 15330733d213SAndy Adamson * a new unconfirmed record should be generated regardless 15340733d213SAndy Adamson * of whether any properties have changed. 15350733d213SAndy Adamson */ 15360733d213SAndy Adamson expire_client(unconf); 15370733d213SAndy Adamson } 15380733d213SAndy Adamson 15390733d213SAndy Adamson out_new: 15400733d213SAndy Adamson /* Normal case */ 1541b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 15420733d213SAndy Adamson if (new == NULL) { 15434731030dSJ. Bruce Fields status = nfserr_jukebox; 15440733d213SAndy Adamson goto out; 15450733d213SAndy Adamson } 15460733d213SAndy Adamson 15470733d213SAndy Adamson gen_clid(new); 15480733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 15490733d213SAndy Adamson out_copy: 15500733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 15510733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 15520733d213SAndy Adamson 155338eb76a5SAndy Adamson exid->seqid = 1; 15540733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 15550733d213SAndy Adamson 15560733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 155749557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 15580733d213SAndy Adamson status = nfs_ok; 15590733d213SAndy Adamson 15600733d213SAndy Adamson out: 15610733d213SAndy Adamson nfs4_unlock_state(); 15620733d213SAndy Adamson error: 15630733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 15640733d213SAndy Adamson return status; 1565069b6ad4SAndy Adamson } 1566069b6ad4SAndy Adamson 1567b85d4c01SBenny Halevy static int 156888e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1569b85d4c01SBenny Halevy { 157088e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 157188e588d5SAndy Adamson slot_seqid); 1572b85d4c01SBenny Halevy 1573b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 157488e588d5SAndy Adamson if (slot_inuse) { 157588e588d5SAndy Adamson if (seqid == slot_seqid) 1576b85d4c01SBenny Halevy return nfserr_jukebox; 1577b85d4c01SBenny Halevy else 1578b85d4c01SBenny Halevy return nfserr_seq_misordered; 1579b85d4c01SBenny Halevy } 1580f6d82485SJ. Bruce Fields /* Note unsigned 32-bit arithmetic handles wraparound: */ 158188e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1582b85d4c01SBenny Halevy return nfs_ok; 158388e588d5SAndy Adamson if (seqid == slot_seqid) 1584b85d4c01SBenny Halevy return nfserr_replay_cache; 1585b85d4c01SBenny Halevy return nfserr_seq_misordered; 1586b85d4c01SBenny Halevy } 1587b85d4c01SBenny Halevy 158849557cc7SAndy Adamson /* 158949557cc7SAndy Adamson * Cache the create session result into the create session single DRC 159049557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 159149557cc7SAndy Adamson * Do this for solo or embedded create session operations. 159249557cc7SAndy Adamson */ 159349557cc7SAndy Adamson static void 159449557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 159549557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 159649557cc7SAndy Adamson { 159749557cc7SAndy Adamson slot->sl_status = nfserr; 159849557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 159949557cc7SAndy Adamson } 160049557cc7SAndy Adamson 160149557cc7SAndy Adamson static __be32 160249557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 160349557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 160449557cc7SAndy Adamson { 160549557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 160649557cc7SAndy Adamson return slot->sl_status; 160749557cc7SAndy Adamson } 160849557cc7SAndy Adamson 16091b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 16101b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 16111b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16121b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 16131b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16141b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 16151b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 16161b74c25bSMi Jinlong 16171b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 16181b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 16191b74c25bSMi Jinlong 1 + /* status */ \ 16201b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 16211b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 16221b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 16231b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 16241b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 16251b74c25bSMi Jinlong 16261b74c25bSMi Jinlong static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 16271b74c25bSMi Jinlong { 16281b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 16291b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 16301b74c25bSMi Jinlong } 16311b74c25bSMi Jinlong 1632069b6ad4SAndy Adamson __be32 1633069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1634069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1635069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1636069b6ad4SAndy Adamson { 1637363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1638ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1639ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 164049557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 164186c3e16cSJ. Bruce Fields bool confirm_me = false; 1642ec6b5d7bSAndy Adamson int status = 0; 1643ec6b5d7bSAndy Adamson 1644a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1645a62573dcSMi Jinlong return nfserr_inval; 1646a62573dcSMi Jinlong 1647ec6b5d7bSAndy Adamson nfs4_lock_state(); 1648ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1649ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1650ec6b5d7bSAndy Adamson 1651ec6b5d7bSAndy Adamson if (conf) { 165249557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 165349557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 165438eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1655ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 165649557cc7SAndy Adamson cs_slot->sl_seqid); 165738eb76a5SAndy Adamson /* Return the cached reply status */ 165849557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 165938eb76a5SAndy Adamson goto out; 166049557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1661ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1662ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1663ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 166449557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1665ec6b5d7bSAndy Adamson goto out; 1666ec6b5d7bSAndy Adamson } 1667ec6b5d7bSAndy Adamson } else if (unconf) { 1668ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1669363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1670ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1671ec6b5d7bSAndy Adamson goto out; 1672ec6b5d7bSAndy Adamson } 1673ec6b5d7bSAndy Adamson 167449557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 167549557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 167638eb76a5SAndy Adamson if (status) { 167738eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1678ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1679cd5b8144SJ. Bruce Fields goto out; 1680ec6b5d7bSAndy Adamson } 1681ec6b5d7bSAndy Adamson 168286c3e16cSJ. Bruce Fields confirm_me = true; 1683ec6b5d7bSAndy Adamson conf = unconf; 1684ec6b5d7bSAndy Adamson } else { 1685ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1686ec6b5d7bSAndy Adamson goto out; 1687ec6b5d7bSAndy Adamson } 1688ec6b5d7bSAndy Adamson 1689408b79bcSJ. Bruce Fields /* 16908323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 16918323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 16928323c3b2SJ. Bruce Fields */ 16938323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 16948323c3b2SJ. Bruce Fields /* 1695408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1696408b79bcSJ. Bruce Fields */ 1697408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1698408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1699408b79bcSJ. Bruce Fields 17001b74c25bSMi Jinlong status = nfserr_toosmall; 17011b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 17021b74c25bSMi Jinlong goto out; 17031b74c25bSMi Jinlong 1704ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1705ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1706ac7c46f2SJ. Bruce Fields if (!new) 1707ec6b5d7bSAndy Adamson goto out; 1708ac7c46f2SJ. Bruce Fields status = nfs_ok; 1709ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1710ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 171112050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 171212050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 171386c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 171449557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1715ec6b5d7bSAndy Adamson 171649557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 171749557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 171886c3e16cSJ. Bruce Fields if (confirm_me) 171986c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1720ec6b5d7bSAndy Adamson out: 1721ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1722ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1723ec6b5d7bSAndy Adamson return status; 1724069b6ad4SAndy Adamson } 1725069b6ad4SAndy Adamson 172657716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 172757716355SJ. Bruce Fields { 172857716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 172957716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 173057716355SJ. Bruce Fields 173157716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 173257716355SJ. Bruce Fields } 173357716355SJ. Bruce Fields 17341d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 17351d1bc8f2SJ. Bruce Fields { 17361d1bc8f2SJ. Bruce Fields switch (*dir) { 17371d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 17381d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 17391d1bc8f2SJ. Bruce Fields return nfs_ok; 17401d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 17411d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 17421d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 17431d1bc8f2SJ. Bruce Fields return nfs_ok; 17441d1bc8f2SJ. Bruce Fields }; 17451d1bc8f2SJ. Bruce Fields return nfserr_inval; 17461d1bc8f2SJ. Bruce Fields } 17471d1bc8f2SJ. Bruce Fields 17481d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 17491d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 17501d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 17511d1bc8f2SJ. Bruce Fields { 17521d1bc8f2SJ. Bruce Fields __be32 status; 17531d1bc8f2SJ. Bruce Fields 17541d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 17551d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 17561d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 17571d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 17581d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 17591d1bc8f2SJ. Bruce Fields * client_lock iself: */ 17601d1bc8f2SJ. Bruce Fields if (cstate->session) { 17611d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 17621d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 17631d1bc8f2SJ. Bruce Fields } 17641d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 17651d1bc8f2SJ. Bruce Fields if (!cstate->session) 17661d1bc8f2SJ. Bruce Fields return nfserr_badsession; 17671d1bc8f2SJ. Bruce Fields 17681d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 17691db2b9ddSBryan Schumaker if (!status) 17701d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 17711db2b9ddSBryan Schumaker return status; 17721d1bc8f2SJ. Bruce Fields } 17731d1bc8f2SJ. Bruce Fields 17745d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 17755d4cec2fSJ. Bruce Fields { 17765d4cec2fSJ. Bruce Fields if (!session) 17775d4cec2fSJ. Bruce Fields return 0; 17785d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 17795d4cec2fSJ. Bruce Fields } 17805d4cec2fSJ. Bruce Fields 1781069b6ad4SAndy Adamson __be32 1782069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1783069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1784069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1785069b6ad4SAndy Adamson { 1786e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1787e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1788e10e0cfcSBenny Halevy 1789e10e0cfcSBenny Halevy /* Notes: 1790e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1791e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1792e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1793e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1794e10e0cfcSBenny Halevy */ 1795e10e0cfcSBenny Halevy 17965d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 179757716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 179857716355SJ. Bruce Fields return nfserr_not_only_op; 179957716355SJ. Bruce Fields } 1800e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 18019089f1b4SBenny Halevy spin_lock(&client_lock); 1802e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1803e10e0cfcSBenny Halevy if (!ses) { 18049089f1b4SBenny Halevy spin_unlock(&client_lock); 1805e10e0cfcSBenny Halevy goto out; 1806e10e0cfcSBenny Halevy } 1807e10e0cfcSBenny Halevy 1808e10e0cfcSBenny Halevy unhash_session(ses); 18099089f1b4SBenny Halevy spin_unlock(&client_lock); 1810e10e0cfcSBenny Halevy 1811ab707e15SBenny Halevy nfs4_lock_state(); 181284f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1813ab707e15SBenny Halevy nfs4_unlock_state(); 181419cf5c02SJ. Bruce Fields 181519cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 181619cf5c02SJ. Bruce Fields 1817e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1818e10e0cfcSBenny Halevy status = nfs_ok; 1819e10e0cfcSBenny Halevy out: 1820e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1821e10e0cfcSBenny Halevy return status; 1822069b6ad4SAndy Adamson } 1823069b6ad4SAndy Adamson 1824a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1825328ead28SJ. Bruce Fields { 1826328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1827328ead28SJ. Bruce Fields 1828328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1829a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1830328ead28SJ. Bruce Fields return c; 1831328ead28SJ. Bruce Fields } 1832328ead28SJ. Bruce Fields } 1833328ead28SJ. Bruce Fields return NULL; 1834328ead28SJ. Bruce Fields } 1835328ead28SJ. Bruce Fields 1836a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1837328ead28SJ. Bruce Fields { 1838328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1839a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 184021b75b01SJ. Bruce Fields int ret; 1841328ead28SJ. Bruce Fields 1842328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1843a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1844328ead28SJ. Bruce Fields if (c) { 1845328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1846328ead28SJ. Bruce Fields free_conn(new); 1847328ead28SJ. Bruce Fields return; 1848328ead28SJ. Bruce Fields } 1849328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1850328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 185121b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 185221b75b01SJ. Bruce Fields if (ret) 185321b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 185421b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1855328ead28SJ. Bruce Fields return; 1856328ead28SJ. Bruce Fields } 1857328ead28SJ. Bruce Fields 1858868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1859868b89c3SMi Jinlong { 1860868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1861868b89c3SMi Jinlong 1862868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1863868b89c3SMi Jinlong } 1864868b89c3SMi Jinlong 1865ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1866ae82a8d0SMi Jinlong struct nfsd4_session *session) 1867ae82a8d0SMi Jinlong { 1868ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1869ae82a8d0SMi Jinlong 1870ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1871ae82a8d0SMi Jinlong } 1872ae82a8d0SMi Jinlong 1873069b6ad4SAndy Adamson __be32 1874b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1875069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1876069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1877069b6ad4SAndy Adamson { 1878f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1879b85d4c01SBenny Halevy struct nfsd4_session *session; 1880b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1881a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1882b85d4c01SBenny Halevy int status; 1883b85d4c01SBenny Halevy 1884f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1885f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1886f9bb94c4SAndy Adamson 1887a663bdd8SJ. Bruce Fields /* 1888a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1889a663bdd8SJ. Bruce Fields * below. 1890a663bdd8SJ. Bruce Fields */ 1891a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1892a663bdd8SJ. Bruce Fields if (!conn) 1893a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1894a663bdd8SJ. Bruce Fields 18959089f1b4SBenny Halevy spin_lock(&client_lock); 1896b85d4c01SBenny Halevy status = nfserr_badsession; 1897b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1898b85d4c01SBenny Halevy if (!session) 1899b85d4c01SBenny Halevy goto out; 1900b85d4c01SBenny Halevy 1901868b89c3SMi Jinlong status = nfserr_too_many_ops; 1902868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1903868b89c3SMi Jinlong goto out; 1904868b89c3SMi Jinlong 1905ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1906ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1907ae82a8d0SMi Jinlong goto out; 1908ae82a8d0SMi Jinlong 1909b85d4c01SBenny Halevy status = nfserr_badslot; 19106c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1911b85d4c01SBenny Halevy goto out; 1912b85d4c01SBenny Halevy 1913557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1914b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1915b85d4c01SBenny Halevy 1916a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1917a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1918a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1919a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1920a8dfdaebSAndy Adamson 192173e79482SJ. Bruce Fields status = check_slot_seqid(seq->seqid, slot->sl_seqid, 192273e79482SJ. Bruce Fields slot->sl_flags & NFSD4_SLOT_INUSE); 1923b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1924bf5c43c8SJ. Bruce Fields status = nfserr_seq_misordered; 1925bf5c43c8SJ. Bruce Fields if (!(slot->sl_flags & NFSD4_SLOT_INITIALIZED)) 1926bf5c43c8SJ. Bruce Fields goto out; 1927b85d4c01SBenny Halevy cstate->slot = slot; 1928b85d4c01SBenny Halevy cstate->session = session; 1929da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1930557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1931bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1932da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1933aaf84eb9SBenny Halevy goto out; 1934b85d4c01SBenny Halevy } 1935b85d4c01SBenny Halevy if (status) 1936b85d4c01SBenny Halevy goto out; 1937b85d4c01SBenny Halevy 1938a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1939a663bdd8SJ. Bruce Fields conn = NULL; 1940328ead28SJ. Bruce Fields 1941b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1942b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1943bf5c43c8SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_INUSE; 194473e79482SJ. Bruce Fields if (seq->cachethis) 194573e79482SJ. Bruce Fields slot->sl_flags |= NFSD4_SLOT_CACHETHIS; 1946bf5c43c8SJ. Bruce Fields else 1947bf5c43c8SJ. Bruce Fields slot->sl_flags &= ~NFSD4_SLOT_CACHETHIS; 1948b85d4c01SBenny Halevy 1949b85d4c01SBenny Halevy cstate->slot = slot; 1950b85d4c01SBenny Halevy cstate->session = session; 1951b85d4c01SBenny Halevy 1952b85d4c01SBenny Halevy out: 195326c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1954aaf84eb9SBenny Halevy if (cstate->session) { 19550d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 19560d7bb719SJ. Bruce Fields 195736acb66bSBenny Halevy nfsd4_get_session(cstate->session); 19580d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 19595423732aSBenny Halevy switch (clp->cl_cb_state) { 19605423732aSBenny Halevy case NFSD4_CB_DOWN: 1961fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_CB_PATH_DOWN; 19625423732aSBenny Halevy break; 19635423732aSBenny Halevy case NFSD4_CB_FAULT: 1964fc0c3dd1SBenny Halevy seq->status_flags = SEQ4_STATUS_BACKCHANNEL_FAULT; 19655423732aSBenny Halevy break; 1966fc0c3dd1SBenny Halevy default: 1967fc0c3dd1SBenny Halevy seq->status_flags = 0; 19685423732aSBenny Halevy } 1969aaf84eb9SBenny Halevy } 1970a663bdd8SJ. Bruce Fields kfree(conn); 197136acb66bSBenny Halevy spin_unlock(&client_lock); 1972b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1973b85d4c01SBenny Halevy return status; 1974069b6ad4SAndy Adamson } 1975069b6ad4SAndy Adamson 1976345c2842SMi Jinlong static inline bool has_resources(struct nfs4_client *clp) 1977345c2842SMi Jinlong { 1978345c2842SMi Jinlong return !list_empty(&clp->cl_openowners) 1979345c2842SMi Jinlong || !list_empty(&clp->cl_delegations) 1980345c2842SMi Jinlong || !list_empty(&clp->cl_sessions); 1981345c2842SMi Jinlong } 1982345c2842SMi Jinlong 1983345c2842SMi Jinlong __be32 1984345c2842SMi Jinlong nfsd4_destroy_clientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_destroy_clientid *dc) 1985345c2842SMi Jinlong { 1986345c2842SMi Jinlong struct nfs4_client *conf, *unconf, *clp; 1987345c2842SMi Jinlong int status = 0; 1988345c2842SMi Jinlong 1989345c2842SMi Jinlong nfs4_lock_state(); 1990345c2842SMi Jinlong unconf = find_unconfirmed_client(&dc->clientid); 1991345c2842SMi Jinlong conf = find_confirmed_client(&dc->clientid); 1992345c2842SMi Jinlong 1993345c2842SMi Jinlong if (conf) { 1994345c2842SMi Jinlong clp = conf; 1995345c2842SMi Jinlong 1996345c2842SMi Jinlong if (!is_client_expired(conf) && has_resources(conf)) { 1997345c2842SMi Jinlong status = nfserr_clientid_busy; 1998345c2842SMi Jinlong goto out; 1999345c2842SMi Jinlong } 2000345c2842SMi Jinlong 2001345c2842SMi Jinlong /* rfc5661 18.50.3 */ 2002345c2842SMi Jinlong if (cstate->session && conf == cstate->session->se_client) { 2003345c2842SMi Jinlong status = nfserr_clientid_busy; 2004345c2842SMi Jinlong goto out; 2005345c2842SMi Jinlong } 2006345c2842SMi Jinlong } else if (unconf) 2007345c2842SMi Jinlong clp = unconf; 2008345c2842SMi Jinlong else { 2009345c2842SMi Jinlong status = nfserr_stale_clientid; 2010345c2842SMi Jinlong goto out; 2011345c2842SMi Jinlong } 2012345c2842SMi Jinlong 2013345c2842SMi Jinlong expire_client(clp); 2014345c2842SMi Jinlong out: 2015345c2842SMi Jinlong nfs4_unlock_state(); 2016345c2842SMi Jinlong dprintk("%s return %d\n", __func__, ntohl(status)); 2017345c2842SMi Jinlong return status; 2018345c2842SMi Jinlong } 2019345c2842SMi Jinlong 2020069b6ad4SAndy Adamson __be32 20214dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 20224dc6ec00SJ. Bruce Fields { 2023bcecf1ccSMi Jinlong int status = 0; 2024bcecf1ccSMi Jinlong 20254dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 20264dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 20274dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 20284dc6ec00SJ. Bruce Fields /* 20294dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 20304dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 20314dc6ec00SJ. Bruce Fields */ 20324dc6ec00SJ. Bruce Fields return nfs_ok; 20334dc6ec00SJ. Bruce Fields } 2034bcecf1ccSMi Jinlong 20354dc6ec00SJ. Bruce Fields nfs4_lock_state(); 2036bcecf1ccSMi Jinlong status = nfserr_complete_already; 2037bcecf1ccSMi Jinlong if (cstate->session->se_client->cl_firststate) 2038bcecf1ccSMi Jinlong goto out; 2039bcecf1ccSMi Jinlong 2040bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 2041bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 20424dc6ec00SJ. Bruce Fields /* 20434dc6ec00SJ. Bruce Fields * The following error isn't really legal. 20444dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 20454dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 20464dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 20474dc6ec00SJ. Bruce Fields * client. 20484dc6ec00SJ. Bruce Fields */ 2049bcecf1ccSMi Jinlong goto out; 2050bcecf1ccSMi Jinlong 2051bcecf1ccSMi Jinlong status = nfs_ok; 20524dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 2053bcecf1ccSMi Jinlong out: 20544dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 2055bcecf1ccSMi Jinlong return status; 20564dc6ec00SJ. Bruce Fields } 20574dc6ec00SJ. Bruce Fields 20584dc6ec00SJ. Bruce Fields __be32 2059b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2060b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 20611da177e4SLinus Torvalds { 2062a084daf5SJ. Bruce Fields struct xdr_netobj clname = setclid->se_name; 20631da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 20641da177e4SLinus Torvalds unsigned int strhashval; 206528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 2066b37ad28bSAl Viro __be32 status; 2067a55370a3SNeilBrown char dname[HEXDIR_LEN]; 20681da177e4SLinus Torvalds 2069a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 2070a55370a3SNeilBrown if (status) 207173aea4ecSNeil Brown return status; 2072a55370a3SNeilBrown 20731da177e4SLinus Torvalds /* 20741da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 20751da177e4SLinus Torvalds * We get here on a DRC miss. 20761da177e4SLinus Torvalds */ 20771da177e4SLinus Torvalds 2078a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds nfs4_lock_state(); 2081e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 208228ce6054SNeilBrown if (conf) { 2083a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 20841da177e4SLinus Torvalds status = nfserr_clid_inuse; 2085e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 2086e203d506SJ. Bruce Fields goto out; 2087026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 2088363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 2089363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 2090363168b4SJeff Layton sizeof(addr_str)); 2091026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 2092363168b4SJeff Layton "at %s\n", addr_str); 20931da177e4SLinus Torvalds goto out; 20941da177e4SLinus Torvalds } 20951da177e4SLinus Torvalds } 2096a186e767SJ. Bruce Fields /* 2097a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 2098a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 2099a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 2100a186e767SJ. Bruce Fields */ 2101e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 21023e772463SJ. Bruce Fields status = nfserr_jukebox; 21031da177e4SLinus Torvalds if (!conf) { 21041da177e4SLinus Torvalds /* 2105a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 2106a186e767SJ. Bruce Fields * placed first, because it is the normal case 21071da177e4SLinus Torvalds */ 21081da177e4SLinus Torvalds if (unconf) 21091da177e4SLinus Torvalds expire_client(unconf); 2110b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2111a55370a3SNeilBrown if (new == NULL) 21121da177e4SLinus Torvalds goto out; 21131da177e4SLinus Torvalds gen_clid(new); 2114599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 21151da177e4SLinus Torvalds /* 2116a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 2117a186e767SJ. Bruce Fields * probable callback update 21181da177e4SLinus Torvalds */ 211931f4a6c1SNeilBrown if (unconf) { 212031f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 212131f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 212231f4a6c1SNeilBrown * This has the advantage that there is at most 212331f4a6c1SNeilBrown * one {*x***} in either list at any time. 212431f4a6c1SNeilBrown */ 21251da177e4SLinus Torvalds expire_client(unconf); 21261da177e4SLinus Torvalds } 2127b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2128a55370a3SNeilBrown if (new == NULL) 21291da177e4SLinus Torvalds goto out; 21301da177e4SLinus Torvalds copy_clid(new, conf); 21311da177e4SLinus Torvalds } else if (!unconf) { 21321da177e4SLinus Torvalds /* 2133a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2134a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2135a186e767SJ. Bruce Fields * confirmed. 21361da177e4SLinus Torvalds */ 2137b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2138a55370a3SNeilBrown if (new == NULL) 21391da177e4SLinus Torvalds goto out; 21401da177e4SLinus Torvalds gen_clid(new); 214149ba8781SJ. Bruce Fields } else { 21421da177e4SLinus Torvalds /* 2143a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2144a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2145a186e767SJ. Bruce Fields * confirmed. 21461da177e4SLinus Torvalds */ 21471da177e4SLinus Torvalds expire_client(unconf); 2148b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2149a55370a3SNeilBrown if (new == NULL) 21501da177e4SLinus Torvalds goto out; 21511da177e4SLinus Torvalds gen_clid(new); 21521da177e4SLinus Torvalds } 21538323c3b2SJ. Bruce Fields /* 21548323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 21558323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 21568323c3b2SJ. Bruce Fields */ 21578323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 21586f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2159c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 21601da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 21611da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 21621da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 21631da177e4SLinus Torvalds status = nfs_ok; 21641da177e4SLinus Torvalds out: 21651da177e4SLinus Torvalds nfs4_unlock_state(); 21661da177e4SLinus Torvalds return status; 21671da177e4SLinus Torvalds } 21681da177e4SLinus Torvalds 21691da177e4SLinus Torvalds 21701da177e4SLinus Torvalds /* 2171a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2172a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2173a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 21741da177e4SLinus Torvalds */ 2175b37ad28bSAl Viro __be32 2176b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2177b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2178b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 21791da177e4SLinus Torvalds { 2180363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 218121ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 21821da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 21831da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2184b37ad28bSAl Viro __be32 status; 21851da177e4SLinus Torvalds 21861da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 21871da177e4SLinus Torvalds return nfserr_stale_clientid; 21881da177e4SLinus Torvalds /* 21891da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 21901da177e4SLinus Torvalds * We get here on a DRC miss. 21911da177e4SLinus Torvalds */ 21921da177e4SLinus Torvalds 21931da177e4SLinus Torvalds nfs4_lock_state(); 219421ab45a4SNeilBrown 219521ab45a4SNeilBrown conf = find_confirmed_client(clid); 219621ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 219721ab45a4SNeilBrown 219822de4d83SNeilBrown status = nfserr_clid_inuse; 2199363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 22001da177e4SLinus Torvalds goto out; 2201363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 22021da177e4SLinus Torvalds goto out; 220321ab45a4SNeilBrown 2204a186e767SJ. Bruce Fields /* 2205a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2206a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2207a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2208a186e767SJ. Bruce Fields */ 2209366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2210a186e767SJ. Bruce Fields /* 2211a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2212a186e767SJ. Bruce Fields * callback update 22137c79f737SNeilBrown */ 2214599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 22151da177e4SLinus Torvalds status = nfserr_clid_inuse; 22161da177e4SLinus Torvalds else { 22175a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 22185a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22191a69c179SNeilBrown expire_client(unconf); 22201da177e4SLinus Torvalds status = nfs_ok; 22211a69c179SNeilBrown 22221da177e4SLinus Torvalds } 2223f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2224a186e767SJ. Bruce Fields /* 2225a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2226a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2227a186e767SJ. Bruce Fields * do nothing. 22287c79f737SNeilBrown */ 2229599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 22301da177e4SLinus Torvalds status = nfserr_clid_inuse; 223121ab45a4SNeilBrown else 22321da177e4SLinus Torvalds status = nfs_ok; 22337c79f737SNeilBrown } else if (!conf && unconf 2234599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2235a186e767SJ. Bruce Fields /* 2236a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2237a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 22381da177e4SLinus Torvalds */ 2239599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 22401da177e4SLinus Torvalds status = nfserr_clid_inuse; 22411da177e4SLinus Torvalds } else { 22421a69c179SNeilBrown unsigned int hash = 22431a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 22441a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2245e203d506SJ. Bruce Fields hash); 22461a69c179SNeilBrown if (conf) { 2247c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 22481a69c179SNeilBrown expire_client(conf); 22491a69c179SNeilBrown } 22501da177e4SLinus Torvalds move_to_confirmed(unconf); 225121ab45a4SNeilBrown conf = unconf; 22525a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 22531a69c179SNeilBrown status = nfs_ok; 22541da177e4SLinus Torvalds } 2255599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2256599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 22577c79f737SNeilBrown &confirm)))) { 2258a186e767SJ. Bruce Fields /* 2259a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2260a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 22611da177e4SLinus Torvalds */ 22621da177e4SLinus Torvalds status = nfserr_stale_clientid; 22637c79f737SNeilBrown } else { 22641da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 226522de4d83SNeilBrown status = nfserr_clid_inuse; 226608e8987cSNeilBrown } 22671da177e4SLinus Torvalds out: 22681da177e4SLinus Torvalds nfs4_unlock_state(); 22691da177e4SLinus Torvalds return status; 22701da177e4SLinus Torvalds } 22711da177e4SLinus Torvalds 227232513b40SJ. Bruce Fields static struct nfs4_file *nfsd4_alloc_file(void) 22731da177e4SLinus Torvalds { 227432513b40SJ. Bruce Fields return kmem_cache_alloc(file_slab, GFP_KERNEL); 227532513b40SJ. Bruce Fields } 227632513b40SJ. Bruce Fields 227732513b40SJ. Bruce Fields /* OPEN Share state helper functions */ 227832513b40SJ. Bruce Fields static void nfsd4_init_file(struct nfs4_file *fp, struct inode *ino) 227932513b40SJ. Bruce Fields { 22801da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 22811da177e4SLinus Torvalds 22828b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 22831da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 22848beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 22858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 22861da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 228747f9940cSMeelap Shah fp->fi_had_conflict = false; 2288acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2289f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2290f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 229147cee541SPavel Emelyanov spin_lock(&recall_lock); 229247cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 229347cee541SPavel Emelyanov spin_unlock(&recall_lock); 22941da177e4SLinus Torvalds } 22951da177e4SLinus Torvalds 22961da177e4SLinus Torvalds static void 2297e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2298e60d4398SNeilBrown { 2299e60d4398SNeilBrown if (*slab == NULL) 2300e60d4398SNeilBrown return; 23011a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2302e60d4398SNeilBrown *slab = NULL; 2303e60d4398SNeilBrown } 2304e60d4398SNeilBrown 2305e8ff2a84SJ. Bruce Fields void 2306e60d4398SNeilBrown nfsd4_free_slabs(void) 2307e60d4398SNeilBrown { 2308fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2309fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2310e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 23115ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 23125b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2313e60d4398SNeilBrown } 23141da177e4SLinus Torvalds 231572083396SBryan Schumaker int 23161da177e4SLinus Torvalds nfsd4_init_slabs(void) 23171da177e4SLinus Torvalds { 2318fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2319fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2320fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2321fe0750e5SJ. Bruce Fields goto out_nomem; 2322fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2323fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2324fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2325e60d4398SNeilBrown goto out_nomem; 2326e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 232720c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2328e60d4398SNeilBrown if (file_slab == NULL) 2329e60d4398SNeilBrown goto out_nomem; 23305ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 2331dcef0413SJ. Bruce Fields sizeof(struct nfs4_ol_stateid), 0, 0, NULL); 23325ac049acSNeilBrown if (stateid_slab == NULL) 23335ac049acSNeilBrown goto out_nomem; 23345b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 233520c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 23365b2d21c1SNeilBrown if (deleg_slab == NULL) 23375b2d21c1SNeilBrown goto out_nomem; 2338e60d4398SNeilBrown return 0; 2339e60d4398SNeilBrown out_nomem: 2340e60d4398SNeilBrown nfsd4_free_slabs(); 23411da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 23421da177e4SLinus Torvalds return -ENOMEM; 23431da177e4SLinus Torvalds } 23441da177e4SLinus Torvalds 2345fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 23461da177e4SLinus Torvalds { 2347fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2348fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2349fe0750e5SJ. Bruce Fields } 2350fe0750e5SJ. Bruce Fields 2351fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2352fe0750e5SJ. Bruce Fields { 2353fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2354fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 23551da177e4SLinus Torvalds } 23561da177e4SLinus Torvalds 2357ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2358ff194bd9SJ. Bruce Fields { 2359ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2360ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2361ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2362ff194bd9SJ. Bruce Fields } 2363ff194bd9SJ. Bruce Fields 2364fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 23651da177e4SLinus Torvalds { 23661da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23671da177e4SLinus Torvalds 2368fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2369ff194bd9SJ. Bruce Fields if (!sop) 2370ff194bd9SJ. Bruce Fields return NULL; 2371ff194bd9SJ. Bruce Fields 2372ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2373ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2374fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2375ff194bd9SJ. Bruce Fields return NULL; 2376ff194bd9SJ. Bruce Fields } 23771da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2378ff194bd9SJ. Bruce Fields 2379ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2380ff194bd9SJ. Bruce Fields sop->so_client = clp; 2381ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 23821da177e4SLinus Torvalds return sop; 23831da177e4SLinus Torvalds } 2384ff194bd9SJ. Bruce Fields 2385fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2386ff194bd9SJ. Bruce Fields { 238716bfdaafSJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 2388fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 23891da177e4SLinus Torvalds } 23901da177e4SLinus Torvalds 2391fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23921da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2393fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 23941da177e4SLinus Torvalds 2395fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2396fe0750e5SJ. Bruce Fields if (!oo) 23971da177e4SLinus Torvalds return NULL; 2398fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2399fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2400d29b20cdSJ. Bruce Fields oo->oo_flags = NFS4_OO_NEW; 2401fe0750e5SJ. Bruce Fields oo->oo_time = 0; 240238c387b5SJ. Bruce Fields oo->oo_last_closed_stid = NULL; 2403fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2404fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2405fe0750e5SJ. Bruce Fields return oo; 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 2408996e0938SJ. Bruce Fields static void init_open_stateid(struct nfs4_ol_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2409fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2410d3b313a4SJ. Bruce Fields struct nfs4_client *clp = oo->oo_owner.so_client; 24111da177e4SLinus Torvalds 2412996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_OPEN_STID); 2413ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 2414fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 24158beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2416fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 241713cd2184SNeilBrown get_nfs4_file(fp); 24181da177e4SLinus Torvalds stp->st_file = fp; 24191da177e4SLinus Torvalds stp->st_access_bmap = 0; 24201da177e4SLinus Torvalds stp->st_deny_bmap = 0; 2421b6d2f1caSJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 24221da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24234c4cd222SNeilBrown stp->st_openstp = NULL; 24241da177e4SLinus Torvalds } 24251da177e4SLinus Torvalds 24261da177e4SLinus Torvalds static void 2427fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 24281da177e4SLinus Torvalds { 2429fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 24301da177e4SLinus Torvalds 2431fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2432fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 24331da177e4SLinus Torvalds } 24341da177e4SLinus Torvalds 24351da177e4SLinus Torvalds static int 2436599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2437599e0a22SJ. Bruce Fields clientid_t *clid) 2438599e0a22SJ. Bruce Fields { 2439599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2440599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2441599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 24421da177e4SLinus Torvalds } 24431da177e4SLinus Torvalds 2444fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 24451da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 24461da177e4SLinus Torvalds { 2447a50d2ad1SJ. Bruce Fields struct nfs4_stateowner *so; 2448a50d2ad1SJ. Bruce Fields struct nfs4_openowner *oo; 24491da177e4SLinus Torvalds 245016bfdaafSJ. Bruce Fields list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 245116bfdaafSJ. Bruce Fields if (!so->so_is_open_owner) 245216bfdaafSJ. Bruce Fields continue; 2453a50d2ad1SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) { 2454a50d2ad1SJ. Bruce Fields oo = openowner(so); 2455a50d2ad1SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 2456a50d2ad1SJ. Bruce Fields return oo; 2457a50d2ad1SJ. Bruce Fields } 24581da177e4SLinus Torvalds } 24591da177e4SLinus Torvalds return NULL; 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 24631da177e4SLinus Torvalds static struct nfs4_file * 24641da177e4SLinus Torvalds find_file(struct inode *ino) 24651da177e4SLinus Torvalds { 24661da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 24671da177e4SLinus Torvalds struct nfs4_file *fp; 24681da177e4SLinus Torvalds 24698b671b80SJ. Bruce Fields spin_lock(&recall_lock); 24701da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 247113cd2184SNeilBrown if (fp->fi_inode == ino) { 247213cd2184SNeilBrown get_nfs4_file(fp); 24738b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24741da177e4SLinus Torvalds return fp; 24751da177e4SLinus Torvalds } 247613cd2184SNeilBrown } 24778b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 24781da177e4SLinus Torvalds return NULL; 24791da177e4SLinus Torvalds } 24801da177e4SLinus Torvalds 24814f83aa30SJ. Bruce Fields /* 24821da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 24831da177e4SLinus Torvalds * WRITE with all zero or all one stateid 24841da177e4SLinus Torvalds */ 2485b37ad28bSAl Viro static __be32 24861da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 24871da177e4SLinus Torvalds { 24881da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 24891da177e4SLinus Torvalds struct nfs4_file *fp; 2490dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 2491b37ad28bSAl Viro __be32 ret; 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24941da177e4SLinus Torvalds 24951da177e4SLinus Torvalds fp = find_file(ino); 249613cd2184SNeilBrown if (!fp) 249713cd2184SNeilBrown return nfs_ok; 2498b700949bSNeilBrown ret = nfserr_locked; 24991da177e4SLinus Torvalds /* Search for conflicting share reservations */ 25008beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 25011da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 25021da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 250313cd2184SNeilBrown goto out; 25041da177e4SLinus Torvalds } 250513cd2184SNeilBrown ret = nfs_ok; 250613cd2184SNeilBrown out: 250713cd2184SNeilBrown put_nfs4_file(fp); 250813cd2184SNeilBrown return ret; 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds 25116b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 25121da177e4SLinus Torvalds { 25131da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 25141da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 25151da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 25161da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 25171da177e4SLinus Torvalds * it's safe to take a reference: */ 25181da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 25191da177e4SLinus Torvalds 25201da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 25211da177e4SLinus Torvalds 2522460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 25231da177e4SLinus Torvalds dp->dl_time = get_seconds(); 25241da177e4SLinus Torvalds 25256b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 25266b57d9c8SJ. Bruce Fields } 25276b57d9c8SJ. Bruce Fields 2528acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 25296b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 25306b57d9c8SJ. Bruce Fields { 2531acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2532acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 25336b57d9c8SJ. Bruce Fields 2534acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2535acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2536acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 25370272e1fdSJ. Bruce Fields /* 25380272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2539acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 25406b57d9c8SJ. Bruce Fields * in time: 25410272e1fdSJ. Bruce Fields */ 25420272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 25431da177e4SLinus Torvalds 25445d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2545acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2546acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 25475d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 25485d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds 25511da177e4SLinus Torvalds static 25521da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 25531da177e4SLinus Torvalds { 25541da177e4SLinus Torvalds if (arg & F_UNLCK) 25551da177e4SLinus Torvalds return lease_modify(onlist, arg); 25561da177e4SLinus Torvalds else 25571da177e4SLinus Torvalds return -EAGAIN; 25581da177e4SLinus Torvalds } 25591da177e4SLinus Torvalds 25607b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 25618fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 25628fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 25631da177e4SLinus Torvalds }; 25641da177e4SLinus Torvalds 25657a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 25667a8711c9SJ. Bruce Fields { 25677a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 25687a8711c9SJ. Bruce Fields return nfs_ok; 25697a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 25707a8711c9SJ. Bruce Fields return nfserr_replay_me; 25717a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 25727a8711c9SJ. Bruce Fields return nfs_ok; 25737a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 25747a8711c9SJ. Bruce Fields } 25751da177e4SLinus Torvalds 2576b37ad28bSAl Viro __be32 25776668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 25786668958fSAndy Adamson struct nfsd4_open *open) 25791da177e4SLinus Torvalds { 25801da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 25811da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 25821da177e4SLinus Torvalds unsigned int strhashval; 2583fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 25844cdc951bSJ. Bruce Fields __be32 status; 25851da177e4SLinus Torvalds 25861da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 25871da177e4SLinus Torvalds return nfserr_stale_clientid; 258832513b40SJ. Bruce Fields /* 258932513b40SJ. Bruce Fields * In case we need it later, after we've already created the 259032513b40SJ. Bruce Fields * file and don't want to risk a further failure: 259132513b40SJ. Bruce Fields */ 259232513b40SJ. Bruce Fields open->op_file = nfsd4_alloc_file(); 259332513b40SJ. Bruce Fields if (open->op_file == NULL) 259432513b40SJ. Bruce Fields return nfserr_jukebox; 25951da177e4SLinus Torvalds 259616bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(clientid->cl_id, &open->op_owner); 2597fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2598fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2599fe0750e5SJ. Bruce Fields if (!oo) { 26000f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 26010f442aa2SJ. Bruce Fields if (clp == NULL) 26020f442aa2SJ. Bruce Fields return nfserr_expired; 2603bcf130f9SJ. Bruce Fields goto new_owner; 26040f442aa2SJ. Bruce Fields } 2605dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) { 26060f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2607fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2608fe0750e5SJ. Bruce Fields release_openowner(oo); 2609fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2610bcf130f9SJ. Bruce Fields goto new_owner; 26110f442aa2SJ. Bruce Fields } 26124cdc951bSJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 26134cdc951bSJ. Bruce Fields if (status) 26144cdc951bSJ. Bruce Fields return status; 26154cdc951bSJ. Bruce Fields clp = oo->oo_owner.so_client; 26164cdc951bSJ. Bruce Fields goto alloc_stateid; 2617bcf130f9SJ. Bruce Fields new_owner: 2618fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2619fe0750e5SJ. Bruce Fields if (oo == NULL) 26203e772463SJ. Bruce Fields return nfserr_jukebox; 2621fe0750e5SJ. Bruce Fields open->op_openowner = oo; 26224cdc951bSJ. Bruce Fields alloc_stateid: 26234cdc951bSJ. Bruce Fields open->op_stp = nfs4_alloc_stateid(clp); 26244cdc951bSJ. Bruce Fields if (!open->op_stp) 26254cdc951bSJ. Bruce Fields return nfserr_jukebox; 26260f442aa2SJ. Bruce Fields return nfs_ok; 26271da177e4SLinus Torvalds } 26281da177e4SLinus Torvalds 2629b37ad28bSAl Viro static inline __be32 26304a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 26314a6e43e6SNeilBrown { 26324a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 26334a6e43e6SNeilBrown return nfserr_openmode; 26344a6e43e6SNeilBrown else 26354a6e43e6SNeilBrown return nfs_ok; 26364a6e43e6SNeilBrown } 26374a6e43e6SNeilBrown 2638c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 263924a0111eSJ. Bruce Fields { 264024a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 264124a0111eSJ. Bruce Fields } 264224a0111eSJ. Bruce Fields 264338c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2644f459e453SJ. Bruce Fields { 2645f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2646f459e453SJ. Bruce Fields 264738c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2648f459e453SJ. Bruce Fields if (!ret) 2649f459e453SJ. Bruce Fields return NULL; 2650f459e453SJ. Bruce Fields return delegstateid(ret); 2651f459e453SJ. Bruce Fields } 2652f459e453SJ. Bruce Fields 26538b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26548b289b2cSJ. Bruce Fields { 26558b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26568b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26578b289b2cSJ. Bruce Fields } 26588b289b2cSJ. Bruce Fields 2659b37ad28bSAl Viro static __be32 266038c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2661567d9829SNeilBrown struct nfs4_delegation **dp) 2662567d9829SNeilBrown { 2663567d9829SNeilBrown int flags; 2664b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2665567d9829SNeilBrown 266638c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2667567d9829SNeilBrown if (*dp == NULL) 2668c44c5eebSNeilBrown goto out; 266924a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2670567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2671567d9829SNeilBrown if (status) 2672567d9829SNeilBrown *dp = NULL; 2673c44c5eebSNeilBrown out: 26748b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2675c44c5eebSNeilBrown return nfs_ok; 2676c44c5eebSNeilBrown if (status) 2677c44c5eebSNeilBrown return status; 2678dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2679c44c5eebSNeilBrown return nfs_ok; 2680567d9829SNeilBrown } 2681567d9829SNeilBrown 2682b37ad28bSAl Viro static __be32 2683dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26841da177e4SLinus Torvalds { 2685dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2686fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26871da177e4SLinus Torvalds 26888beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26891da177e4SLinus Torvalds /* ignore lock owners */ 26901da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26911da177e4SLinus Torvalds continue; 26921da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2693fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 26941da177e4SLinus Torvalds *stpp = local; 26951da177e4SLinus Torvalds /* check for conflicting share reservations */ 26961da177e4SLinus Torvalds if (!test_share(local, open)) 269777eaae8dSJ. Bruce Fields return nfserr_share_denied; 26981da177e4SLinus Torvalds } 269977eaae8dSJ. Bruce Fields return nfs_ok; 27001da177e4SLinus Torvalds } 27011da177e4SLinus Torvalds 2702996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2703996e0938SJ. Bruce Fields { 2704996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27055ac049acSNeilBrown } 27065ac049acSNeilBrown 270721fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 270821fb4016SJ. Bruce Fields { 270921fb4016SJ. Bruce Fields int flags = 0; 271021fb4016SJ. Bruce Fields 271121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 271221fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 271321fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 271421fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 271521fb4016SJ. Bruce Fields return flags; 271621fb4016SJ. Bruce Fields } 271721fb4016SJ. Bruce Fields 27180c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27190c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2720f9d7562fSJ. Bruce Fields { 2721f9d7562fSJ. Bruce Fields __be32 status; 27220c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27230c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27240c12eaffSCasey Bodley 2725f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2726f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2727f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2728f9d7562fSJ. Bruce Fields if (status) 2729f9d7562fSJ. Bruce Fields return status; 2730f9d7562fSJ. Bruce Fields } 2731f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2732f9d7562fSJ. Bruce Fields 2733f9d7562fSJ. Bruce Fields return nfs_ok; 2734f9d7562fSJ. Bruce Fields } 2735f9d7562fSJ. Bruce Fields 2736b37ad28bSAl Viro static inline __be32 27371da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27381da177e4SLinus Torvalds struct nfsd4_open *open) 27391da177e4SLinus Torvalds { 27401da177e4SLinus Torvalds struct iattr iattr = { 27411da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27421da177e4SLinus Torvalds .ia_size = 0, 27431da177e4SLinus Torvalds }; 27441da177e4SLinus Torvalds if (!open->op_truncate) 27451da177e4SLinus Torvalds return 0; 27461da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27479246585aSAl Viro return nfserr_inval; 27481da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27491da177e4SLinus Torvalds } 27501da177e4SLinus Torvalds 2751b37ad28bSAl Viro static __be32 2752dcef0413SJ. 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) 27531da177e4SLinus Torvalds { 2754b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27557d947842SJ. Bruce Fields bool new_access; 2756b37ad28bSAl Viro __be32 status; 27571da177e4SLinus Torvalds 27587d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2759f9d7562fSJ. Bruce Fields if (new_access) { 27600c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2761f9d7562fSJ. Bruce Fields if (status) 2762f9d7562fSJ. Bruce Fields return status; 27636c26d08fSJ. Bruce Fields } 27641da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27651da177e4SLinus Torvalds if (status) { 2766f9d7562fSJ. Bruce Fields if (new_access) { 2767f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2768f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2769f9d7562fSJ. Bruce Fields } 27701da177e4SLinus Torvalds return status; 27711da177e4SLinus Torvalds } 27721da177e4SLinus Torvalds /* remember the open */ 277324a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2774b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27751da177e4SLinus Torvalds 27761da177e4SLinus Torvalds return nfs_ok; 27771da177e4SLinus Torvalds } 27781da177e4SLinus Torvalds 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds static void 27811255a8f3SJ. Bruce Fields nfs4_set_claim_prev(struct nfsd4_open *open, bool has_session) 27821da177e4SLinus Torvalds { 2783dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 27841255a8f3SJ. Bruce Fields /* 27851255a8f3SJ. Bruce Fields * On a 4.1+ client, we don't create a state record for a client 27861255a8f3SJ. Bruce Fields * until it performs RECLAIM_COMPLETE: 27871255a8f3SJ. Bruce Fields */ 27881255a8f3SJ. Bruce Fields if (!has_session) 2789fe0750e5SJ. Bruce Fields open->op_openowner->oo_owner.so_client->cl_firststate = 1; 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds 279214a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 279314a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 279414a24e99SJ. Bruce Fields { 279514a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 279614a24e99SJ. Bruce Fields return true; 279714a24e99SJ. Bruce Fields /* 279814a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 279914a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 280014a24e99SJ. Bruce Fields * until we hear otherwise: 280114a24e99SJ. Bruce Fields */ 280214a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 280314a24e99SJ. Bruce Fields } 280414a24e99SJ. Bruce Fields 280522d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 280622d38c4cSJ. Bruce Fields { 280722d38c4cSJ. Bruce Fields struct file_lock *fl; 280822d38c4cSJ. Bruce Fields 280922d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 281022d38c4cSJ. Bruce Fields if (!fl) 281122d38c4cSJ. Bruce Fields return NULL; 281222d38c4cSJ. Bruce Fields locks_init_lock(fl); 281322d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 281422d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 281522d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 281622d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2817acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 281822d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 281922d38c4cSJ. Bruce Fields return fl; 282022d38c4cSJ. Bruce Fields } 282122d38c4cSJ. Bruce Fields 2822edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2823edab9782SJ. Bruce Fields { 2824acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2825edab9782SJ. Bruce Fields struct file_lock *fl; 2826edab9782SJ. Bruce Fields int status; 2827edab9782SJ. Bruce Fields 2828edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2829edab9782SJ. Bruce Fields if (!fl) 2830edab9782SJ. Bruce Fields return -ENOMEM; 2831acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28322a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2833acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2834edab9782SJ. Bruce Fields if (status) { 2835acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2836edab9782SJ. Bruce Fields locks_free_lock(fl); 2837edab9782SJ. Bruce Fields return -ENOMEM; 2838edab9782SJ. Bruce Fields } 2839acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2840acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2841acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2842acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2843acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2844acfdf5c3SJ. Bruce Fields return 0; 2845acfdf5c3SJ. Bruce Fields } 2846acfdf5c3SJ. Bruce Fields 2847acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2848acfdf5c3SJ. Bruce Fields { 2849acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2850acfdf5c3SJ. Bruce Fields 2851acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2852acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2853acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2854acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2855acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2856acfdf5c3SJ. Bruce Fields return -EAGAIN; 2857acfdf5c3SJ. Bruce Fields } 2858acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2859acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2860acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28612a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2862edab9782SJ. Bruce Fields return 0; 2863edab9782SJ. Bruce Fields } 2864edab9782SJ. Bruce Fields 28651da177e4SLinus Torvalds /* 28661da177e4SLinus Torvalds * Attempt to hand out a delegation. 28671da177e4SLinus Torvalds */ 28681da177e4SLinus Torvalds static void 2869dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28701da177e4SLinus Torvalds { 28711da177e4SLinus Torvalds struct nfs4_delegation *dp; 2872fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 287314a24e99SJ. Bruce Fields int cb_up; 2874d24433cdSBenny Halevy int status = 0, flag = 0; 28751da177e4SLinus Torvalds 2876fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28771da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28787b190fecSNeilBrown open->op_recall = 0; 28797b190fecSNeilBrown switch (open->op_claim_type) { 28807b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28812bf23875SJ. Bruce Fields if (!cb_up) 28827b190fecSNeilBrown open->op_recall = 1; 28837b190fecSNeilBrown flag = open->op_delegate_type; 28847b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28851da177e4SLinus Torvalds goto out; 28867b190fecSNeilBrown break; 28877b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28887b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28897b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2890af558e33SJ. Bruce Fields if (locks_in_grace()) 28917b190fecSNeilBrown goto out; 2892dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 28937b190fecSNeilBrown goto out; 28941da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28951da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28961da177e4SLinus Torvalds else 28971da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28987b190fecSNeilBrown break; 28997b190fecSNeilBrown default: 29007b190fecSNeilBrown goto out; 29017b190fecSNeilBrown } 29021da177e4SLinus Torvalds 2903fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2904dd239cc0SJ. Bruce Fields if (dp == NULL) 2905dd239cc0SJ. Bruce Fields goto out_no_deleg; 2906acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2907edab9782SJ. Bruce Fields if (status) 2908dd239cc0SJ. Bruce Fields goto out_free; 29091da177e4SLinus Torvalds 2910d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29111da177e4SLinus Torvalds 29128c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2913d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29141da177e4SLinus Torvalds out: 29151da177e4SLinus Torvalds open->op_delegate_type = flag; 2916d24433cdSBenny Halevy if (flag == NFS4_OPEN_DELEGATE_NONE) { 2917d24433cdSBenny Halevy if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS && 2918d24433cdSBenny Halevy open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 2919d24433cdSBenny Halevy dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 2920d24433cdSBenny Halevy 2921d24433cdSBenny Halevy if (open->op_deleg_want) { 2922d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 2923d24433cdSBenny Halevy if (status == -EAGAIN) 2924d24433cdSBenny Halevy open->op_why_no_deleg = WND4_CONTENTION; 2925d24433cdSBenny Halevy else { 2926d24433cdSBenny Halevy open->op_why_no_deleg = WND4_RESOURCE; 2927d24433cdSBenny Halevy switch (open->op_deleg_want) { 2928d24433cdSBenny Halevy case NFS4_SHARE_WANT_READ_DELEG: 2929d24433cdSBenny Halevy case NFS4_SHARE_WANT_WRITE_DELEG: 2930d24433cdSBenny Halevy case NFS4_SHARE_WANT_ANY_DELEG: 2931d24433cdSBenny Halevy break; 2932d24433cdSBenny Halevy case NFS4_SHARE_WANT_CANCEL: 2933d24433cdSBenny Halevy open->op_why_no_deleg = WND4_CANCELLED; 2934d24433cdSBenny Halevy break; 2935d24433cdSBenny Halevy case NFS4_SHARE_WANT_NO_DELEG: 2936d24433cdSBenny Halevy BUG(); /* not supposed to get here */ 2937d24433cdSBenny Halevy } 2938d24433cdSBenny Halevy } 2939d24433cdSBenny Halevy } 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 29491da177e4SLinus Torvalds /* 29501da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29511da177e4SLinus Torvalds */ 2952b37ad28bSAl Viro __be32 29531da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29541da177e4SLinus Torvalds { 29556668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 295638c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29571da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29581da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2959dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2960567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2961b37ad28bSAl Viro __be32 status; 29621da177e4SLinus Torvalds 29631da177e4SLinus Torvalds /* 29641da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29651da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29661da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29671da177e4SLinus Torvalds */ 29681da177e4SLinus Torvalds fp = find_file(ino); 29691da177e4SLinus Torvalds if (fp) { 29701da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29711da177e4SLinus Torvalds goto out; 297238c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2973c44c5eebSNeilBrown if (status) 2974c44c5eebSNeilBrown goto out; 29751da177e4SLinus Torvalds } else { 2976c44c5eebSNeilBrown status = nfserr_bad_stateid; 29778b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 2978c44c5eebSNeilBrown goto out; 29793e772463SJ. Bruce Fields status = nfserr_jukebox; 298032513b40SJ. Bruce Fields fp = open->op_file; 298132513b40SJ. Bruce Fields open->op_file = NULL; 298232513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 29831da177e4SLinus Torvalds } 29841da177e4SLinus Torvalds 29851da177e4SLinus Torvalds /* 29861da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 29871da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 29881da177e4SLinus Torvalds */ 29891da177e4SLinus Torvalds if (stp) { 29901da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2991f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 29921da177e4SLinus Torvalds if (status) 29931da177e4SLinus Torvalds goto out; 29941da177e4SLinus Torvalds } else { 29954cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 2996567d9829SNeilBrown if (status) 29971da177e4SLinus Torvalds goto out; 29984cdc951bSJ. Bruce Fields stp = open->op_stp; 29994cdc951bSJ. Bruce Fields open->op_stp = NULL; 3000996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 30011da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 30021da177e4SLinus Torvalds if (status) { 30032283963fSJ. Bruce Fields release_open_stateid(stp); 30041da177e4SLinus Torvalds goto out; 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds } 3007dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3008dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 30091da177e4SLinus Torvalds 3010d24433cdSBenny Halevy if (nfsd4_has_session(&resp->cstate)) { 3011dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 30126668958fSAndy Adamson 3013d24433cdSBenny Halevy if (open->op_deleg_want & NFS4_SHARE_WANT_NO_DELEG) { 3014d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3015d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_WANTED; 3016d24433cdSBenny Halevy goto nodeleg; 3017d24433cdSBenny Halevy } 3018d24433cdSBenny Halevy } 3019d24433cdSBenny Halevy 30201da177e4SLinus Torvalds /* 30211da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 30221da177e4SLinus Torvalds * OPEN succeeds even if we fail. 30231da177e4SLinus Torvalds */ 30241da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 3025d24433cdSBenny Halevy nodeleg: 30261da177e4SLinus Torvalds status = nfs_ok; 30271da177e4SLinus Torvalds 30288c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 3029dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 30301da177e4SLinus Torvalds out: 3031d24433cdSBenny Halevy /* 4.1 client trying to upgrade/downgrade delegation? */ 3032d24433cdSBenny Halevy if (open->op_delegate_type == NFS4_OPEN_DELEGATE_NONE && dp && 3033d24433cdSBenny Halevy open->op_deleg_want) { 3034d24433cdSBenny Halevy if (open->op_deleg_want == NFS4_SHARE_WANT_READ_DELEG && 3035d24433cdSBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3036d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3037d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_DOWNGRADE; 3038d24433cdSBenny Halevy } else if (open->op_deleg_want == NFS4_SHARE_WANT_WRITE_DELEG && 3039d24433cdSBenny Halevy dp->dl_type == NFS4_OPEN_DELEGATE_WRITE) { 3040d24433cdSBenny Halevy open->op_delegate_type = NFS4_OPEN_DELEGATE_NONE_EXT; 3041d24433cdSBenny Halevy open->op_why_no_deleg = WND4_NOT_SUPP_UPGRADE; 3042d24433cdSBenny Halevy } 3043d24433cdSBenny Halevy /* Otherwise the client must be confused wanting a delegation 3044d24433cdSBenny Halevy * it already has, therefore we don't return 3045d24433cdSBenny Halevy * NFS4_OPEN_DELEGATE_NONE_EXT and reason. 3046d24433cdSBenny Halevy */ 3047d24433cdSBenny Halevy } 3048d24433cdSBenny Halevy 304913cd2184SNeilBrown if (fp) 305013cd2184SNeilBrown put_nfs4_file(fp); 305137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 30521255a8f3SJ. Bruce Fields nfs4_set_claim_prev(open, nfsd4_has_session(&resp->cstate)); 30531da177e4SLinus Torvalds /* 30541da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30551da177e4SLinus Torvalds */ 30561da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3057dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30586668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30591da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30601da177e4SLinus Torvalds 30611da177e4SLinus Torvalds return status; 30621da177e4SLinus Torvalds } 30631da177e4SLinus Torvalds 3064d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3065d29b20cdSJ. Bruce Fields { 3066d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3067d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3068d29b20cdSJ. Bruce Fields 3069d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3070d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3071d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3072d29b20cdSJ. Bruce Fields if (status) { 3073d29b20cdSJ. Bruce Fields release_openowner(oo); 3074d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3075d29b20cdSJ. Bruce Fields } else 3076d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3077d29b20cdSJ. Bruce Fields } 3078d29b20cdSJ. Bruce Fields } 307932513b40SJ. Bruce Fields if (open->op_file) 308032513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30814cdc951bSJ. Bruce Fields if (open->op_stp) 30824cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3083d29b20cdSJ. Bruce Fields } 3084d29b20cdSJ. Bruce Fields 3085b37ad28bSAl Viro __be32 3086b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3087b591480bSJ.Bruce Fields clientid_t *clid) 30881da177e4SLinus Torvalds { 30891da177e4SLinus Torvalds struct nfs4_client *clp; 3090b37ad28bSAl Viro __be32 status; 30911da177e4SLinus Torvalds 30921da177e4SLinus Torvalds nfs4_lock_state(); 30931da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 30941da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30951da177e4SLinus Torvalds status = nfserr_stale_clientid; 30961da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 30971da177e4SLinus Torvalds goto out; 30981da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30991da177e4SLinus Torvalds status = nfserr_expired; 31001da177e4SLinus Torvalds if (clp == NULL) { 31011da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 31021da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 31031da177e4SLinus Torvalds goto out; 31041da177e4SLinus Torvalds } 31051da177e4SLinus Torvalds status = nfserr_cb_path_down; 3106ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 310777a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 31081da177e4SLinus Torvalds goto out; 31091da177e4SLinus Torvalds status = nfs_ok; 31101da177e4SLinus Torvalds out: 31111da177e4SLinus Torvalds nfs4_unlock_state(); 31121da177e4SLinus Torvalds return status; 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds 3115c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3116af558e33SJ. Bruce Fields }; 3117af558e33SJ. Bruce Fields 3118a76b4319SNeilBrown static void 3119af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3120a76b4319SNeilBrown { 3121a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3122c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 3123af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3124e46b498cSJ. Bruce Fields /* 3125e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3126e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3127e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3128e46b498cSJ. Bruce Fields */ 3129e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3130a76b4319SNeilBrown } 3131a76b4319SNeilBrown 3132fd39ca9aSNeilBrown static time_t 31331da177e4SLinus Torvalds nfs4_laundromat(void) 31341da177e4SLinus Torvalds { 31351da177e4SLinus Torvalds struct nfs4_client *clp; 3136fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 31371da177e4SLinus Torvalds struct nfs4_delegation *dp; 31381da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3139cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3140cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3141cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 31421da177e4SLinus Torvalds 31431da177e4SLinus Torvalds nfs4_lock_state(); 31441da177e4SLinus Torvalds 31451da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3146af558e33SJ. Bruce Fields if (locks_in_grace()) 3147af558e33SJ. Bruce Fields nfsd4_end_grace(); 314836acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 314936acb66bSBenny Halevy spin_lock(&client_lock); 31501da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31511da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31521da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31531da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31541da177e4SLinus Torvalds if (clientid_val > t) 31551da177e4SLinus Torvalds clientid_val = t; 31561da177e4SLinus Torvalds break; 31571da177e4SLinus Torvalds } 3158d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3159d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3160d7682988SBenny Halevy clp->cl_clientid.cl_id); 3161d7682988SBenny Halevy continue; 3162d7682988SBenny Halevy } 3163d7682988SBenny Halevy unhash_client_locked(clp); 3164d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 316536acb66bSBenny Halevy } 316636acb66bSBenny Halevy spin_unlock(&client_lock); 316736acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 316836acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31691da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31701da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3171c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 31721da177e4SLinus Torvalds expire_client(clp); 31731da177e4SLinus Torvalds } 31741da177e4SLinus Torvalds spin_lock(&recall_lock); 31751da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31761da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31771da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31781da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31791da177e4SLinus Torvalds if (test_val > u) 31801da177e4SLinus Torvalds test_val = u; 31811da177e4SLinus Torvalds break; 31821da177e4SLinus Torvalds } 31831da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31841da177e4SLinus Torvalds } 31851da177e4SLinus Torvalds spin_unlock(&recall_lock); 31861da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 31871da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31881da177e4SLinus Torvalds unhash_delegation(dp); 31891da177e4SLinus Torvalds } 3190cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 31911da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3192fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3193fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3194fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 31951da177e4SLinus Torvalds if (test_val > u) 31961da177e4SLinus Torvalds test_val = u; 31971da177e4SLinus Torvalds break; 31981da177e4SLinus Torvalds } 3199fe0750e5SJ. Bruce Fields release_openowner(oo); 32001da177e4SLinus Torvalds } 32011da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 32021da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 32031da177e4SLinus Torvalds nfs4_unlock_state(); 32041da177e4SLinus Torvalds return clientid_val; 32051da177e4SLinus Torvalds } 32061da177e4SLinus Torvalds 3207a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3208a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3209a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3210a254b246SHarvey Harrison 3211a254b246SHarvey Harrison static void 3212c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 32131da177e4SLinus Torvalds { 32141da177e4SLinus Torvalds time_t t; 32151da177e4SLinus Torvalds 32161da177e4SLinus Torvalds t = nfs4_laundromat(); 32171da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 321858da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 32191da177e4SLinus Torvalds } 32201da177e4SLinus Torvalds 3221f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3222f8816512SNeilBrown { 3223f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3224f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3225f7a4d872SJ. Bruce Fields return nfs_ok; 32261da177e4SLinus Torvalds } 32271da177e4SLinus Torvalds 32281da177e4SLinus Torvalds static int 32291da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 32301da177e4SLinus Torvalds { 3231d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3232e4e83ea4SJ. Bruce Fields return 0; 32338c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 32348c10cbdbSBenny Halevy STATEID_VAL(stateid)); 32351da177e4SLinus Torvalds return 1; 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 32381da177e4SLinus Torvalds static inline int 32391da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 32401da177e4SLinus Torvalds { 32411da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 32421da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 32431da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 32441da177e4SLinus Torvalds } 32451da177e4SLinus Torvalds 32461da177e4SLinus Torvalds static inline int 32471da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 32481da177e4SLinus Torvalds { 32491da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 32501da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds static 3254dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32551da177e4SLinus Torvalds { 3256b37ad28bSAl Viro __be32 status = nfserr_openmode; 32571da177e4SLinus Torvalds 325802921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 325902921914SJ. Bruce Fields if (stp->st_openstp) 326002921914SJ. Bruce Fields stp = stp->st_openstp; 32611da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 32621da177e4SLinus Torvalds goto out; 32631da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 32641da177e4SLinus Torvalds goto out; 32651da177e4SLinus Torvalds status = nfs_ok; 32661da177e4SLinus Torvalds out: 32671da177e4SLinus Torvalds return status; 32681da177e4SLinus Torvalds } 32691da177e4SLinus Torvalds 3270b37ad28bSAl Viro static inline __be32 32711da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 32721da177e4SLinus Torvalds { 3273203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32741da177e4SLinus Torvalds return nfs_ok; 3275af558e33SJ. Bruce Fields else if (locks_in_grace()) { 327625985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32771da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32781da177e4SLinus Torvalds return nfserr_grace; 32791da177e4SLinus Torvalds } else if (flags & WR_STATE) 32801da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32811da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32821da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32831da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32841da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32851da177e4SLinus Torvalds } 32861da177e4SLinus Torvalds 32871da177e4SLinus Torvalds /* 32881da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 32891da177e4SLinus Torvalds * that are not able to provide mandatory locking. 32901da177e4SLinus Torvalds */ 32911da177e4SLinus Torvalds static inline int 329218f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 32931da177e4SLinus Torvalds { 3294203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 32951da177e4SLinus Torvalds } 32961da177e4SLinus Torvalds 329781b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 329881b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 329981b82965SJ. Bruce Fields { 330081b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 330181b82965SJ. Bruce Fields } 330281b82965SJ. Bruce Fields 330328dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 33040836f587SJ. Bruce Fields { 33056668958fSAndy Adamson /* 33066668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 33076668958fSAndy Adamson * when it is zero. 33086668958fSAndy Adamson */ 330928dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 331081b82965SJ. Bruce Fields return nfs_ok; 331181b82965SJ. Bruce Fields 331281b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 331381b82965SJ. Bruce Fields return nfs_ok; 33146668958fSAndy Adamson 33150836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 331681b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 33170836f587SJ. Bruce Fields return nfserr_bad_stateid; 33180836f587SJ. Bruce Fields /* 331981b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 332081b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 332181b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 332281b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 332381b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 332481b82965SJ. Bruce Fields * but better performance may result in retrying IO that 332581b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 332681b82965SJ. Bruce Fields * reordered in flight: 33270836f587SJ. Bruce Fields */ 33280836f587SJ. Bruce Fields return nfserr_old_stateid; 33290836f587SJ. Bruce Fields } 33300836f587SJ. Bruce Fields 333138c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 333217456804SBryan Schumaker { 333397b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 333497b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 333597b7e3b6SJ. Bruce Fields __be32 status; 333617456804SBryan Schumaker 333717456804SBryan Schumaker if (STALE_STATEID(stateid)) 333897b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 333917456804SBryan Schumaker 334038c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 334197b7e3b6SJ. Bruce Fields if (!s) 334297b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 334336279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 334417456804SBryan Schumaker if (status) 334517456804SBryan Schumaker return status; 334697b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 334797b7e3b6SJ. Bruce Fields return nfs_ok; 334897b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 334997b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3350dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 335197b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 335297b7e3b6SJ. Bruce Fields return nfs_ok; 335317456804SBryan Schumaker } 335417456804SBryan Schumaker 335538c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 335638c2f4b1SJ. Bruce Fields { 335738c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 335838c2f4b1SJ. Bruce Fields 335938c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 336038c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 336138c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 336238c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 336338c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 336438c2f4b1SJ. Bruce Fields if (!cl) 336538c2f4b1SJ. Bruce Fields return nfserr_expired; 336638c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 336738c2f4b1SJ. Bruce Fields if (!*s) 336838c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 336938c2f4b1SJ. Bruce Fields return nfs_ok; 337038c2f4b1SJ. Bruce Fields 337138c2f4b1SJ. Bruce Fields } 337238c2f4b1SJ. Bruce Fields 33731da177e4SLinus Torvalds /* 33741da177e4SLinus Torvalds * Checks for stateid operations 33751da177e4SLinus Torvalds */ 3376b37ad28bSAl Viro __be32 3377dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3378dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 33791da177e4SLinus Torvalds { 338069064a27SJ. Bruce Fields struct nfs4_stid *s; 3381dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 33821da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3383dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 33841da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3385b37ad28bSAl Viro __be32 status; 33861da177e4SLinus Torvalds 33871da177e4SLinus Torvalds if (filpp) 33881da177e4SLinus Torvalds *filpp = NULL; 33891da177e4SLinus Torvalds 339018f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 33911da177e4SLinus Torvalds return nfserr_grace; 33921da177e4SLinus Torvalds 33931da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33941da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 33951da177e4SLinus Torvalds 339638c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 339738c2f4b1SJ. Bruce Fields if (status) 339838c2f4b1SJ. Bruce Fields return status; 339969064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 34000c2a498fSJ. Bruce Fields if (status) 34010c2a498fSJ. Bruce Fields goto out; 3402f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3403f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 340469064a27SJ. Bruce Fields dp = delegstateid(s); 3405dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3406dc9bf700SJ. Bruce Fields if (status) 3407dc9bf700SJ. Bruce Fields goto out; 340843b0178eSDan Carpenter if (filpp) { 3409acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3410f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 341143b0178eSDan Carpenter } 3412f7a4d872SJ. Bruce Fields break; 3413f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3414f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 341569064a27SJ. Bruce Fields stp = openlockstateid(s); 3416f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3417f7a4d872SJ. Bruce Fields if (status) 34181da177e4SLinus Torvalds goto out; 3419fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3420dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 34211da177e4SLinus Torvalds goto out; 3422a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3423a4455be0SJ. Bruce Fields if (status) 34241da177e4SLinus Torvalds goto out; 3425f9d7562fSJ. Bruce Fields if (filpp) { 3426f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3427f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3428f9d7562fSJ. Bruce Fields else 3429f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3430f9d7562fSJ. Bruce Fields } 3431f7a4d872SJ. Bruce Fields break; 3432f7a4d872SJ. Bruce Fields default: 3433f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 34341da177e4SLinus Torvalds } 34351da177e4SLinus Torvalds status = nfs_ok; 34361da177e4SLinus Torvalds out: 34371da177e4SLinus Torvalds return status; 34381da177e4SLinus Torvalds } 34391da177e4SLinus Torvalds 3440e1ca12dfSBryan Schumaker static __be32 3441dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3442e1ca12dfSBryan Schumaker { 3443fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3444e1ca12dfSBryan Schumaker return nfserr_locks_held; 3445e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3446e1ca12dfSBryan Schumaker return nfs_ok; 3447e1ca12dfSBryan Schumaker } 3448e1ca12dfSBryan Schumaker 3449e1ca12dfSBryan Schumaker /* 345017456804SBryan Schumaker * Test if the stateid is valid 345117456804SBryan Schumaker */ 345217456804SBryan Schumaker __be32 345317456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 345417456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 345517456804SBryan Schumaker { 345603cfb420SBryan Schumaker struct nfsd4_test_stateid_id *stateid; 345703cfb420SBryan Schumaker struct nfs4_client *cl = cstate->session->se_client; 345803cfb420SBryan Schumaker 345903cfb420SBryan Schumaker nfs4_lock_state(); 346003cfb420SBryan Schumaker list_for_each_entry(stateid, &test_stateid->ts_stateid_list, ts_id_list) 346103cfb420SBryan Schumaker stateid->ts_id_status = nfs4_validate_stateid(cl, &stateid->ts_id_stateid); 346203cfb420SBryan Schumaker nfs4_unlock_state(); 346303cfb420SBryan Schumaker 346417456804SBryan Schumaker return nfs_ok; 346517456804SBryan Schumaker } 346617456804SBryan Schumaker 3467e1ca12dfSBryan Schumaker __be32 3468e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3469e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3470e1ca12dfSBryan Schumaker { 3471e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34722da1cec7SJ. Bruce Fields struct nfs4_stid *s; 347338c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34742da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3475e1ca12dfSBryan Schumaker 3476e1ca12dfSBryan Schumaker nfs4_lock_state(); 347738c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 34782da1cec7SJ. Bruce Fields if (!s) 3479e1ca12dfSBryan Schumaker goto out; 34802da1cec7SJ. Bruce Fields switch (s->sc_type) { 34812da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3482e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3483e1ca12dfSBryan Schumaker goto out; 34842da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 34852da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 34862da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 34872da1cec7SJ. Bruce Fields if (ret) 3488e1ca12dfSBryan Schumaker goto out; 34892da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 34902da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 34912da1cec7SJ. Bruce Fields else 34922da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3493f7a4d872SJ. Bruce Fields break; 3494f7a4d872SJ. Bruce Fields default: 3495f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3496e1ca12dfSBryan Schumaker } 3497e1ca12dfSBryan Schumaker out: 3498e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3499e1ca12dfSBryan Schumaker return ret; 3500e1ca12dfSBryan Schumaker } 3501e1ca12dfSBryan Schumaker 35024c4cd222SNeilBrown static inline int 35034c4cd222SNeilBrown setlkflg (int type) 35044c4cd222SNeilBrown { 35054c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 35064c4cd222SNeilBrown RD_STATE : WR_STATE; 35074c4cd222SNeilBrown } 35081da177e4SLinus Torvalds 3509dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3510c0a5d93eSJ. Bruce Fields { 3511c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3512c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3513c0a5d93eSJ. Bruce Fields __be32 status; 3514c0a5d93eSJ. Bruce Fields 3515c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3516c0a5d93eSJ. Bruce Fields if (status) 3517c0a5d93eSJ. Bruce Fields return status; 3518f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3519f7a4d872SJ. Bruce Fields /* 3520f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3521f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3522f7a4d872SJ. Bruce Fields */ 3523f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3524f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3525f7a4d872SJ. Bruce Fields if (status) 3526f7a4d872SJ. Bruce Fields return status; 3527f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3528c0a5d93eSJ. Bruce Fields } 3529c0a5d93eSJ. Bruce Fields 35301da177e4SLinus Torvalds /* 35311da177e4SLinus Torvalds * Checks for sequence id mutating operations. 35321da177e4SLinus Torvalds */ 3533b37ad28bSAl Viro static __be32 3534dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 35352288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3536dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 35371da177e4SLinus Torvalds { 35380836f587SJ. Bruce Fields __be32 status; 353938c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 35401da177e4SLinus Torvalds 35418c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 35428c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 35431da177e4SLinus Torvalds 35441da177e4SLinus Torvalds *stpp = NULL; 354538c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3546c0a5d93eSJ. Bruce Fields if (status) 3547c0a5d93eSJ. Bruce Fields return status; 354838c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3549c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 35501da177e4SLinus Torvalds 3551c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 35521da177e4SLinus Torvalds } 35531da177e4SLinus Torvalds 3554dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3555c0a5d93eSJ. Bruce Fields { 3556c0a5d93eSJ. Bruce Fields __be32 status; 3557c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35581da177e4SLinus Torvalds 3559c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35602288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35610836f587SJ. Bruce Fields if (status) 35620836f587SJ. Bruce Fields return status; 3563c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3564dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3565c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35663a4f98bbSNeilBrown return nfs_ok; 35671da177e4SLinus Torvalds } 35681da177e4SLinus Torvalds 3569b37ad28bSAl Viro __be32 3570ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3571a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35721da177e4SLinus Torvalds { 3573b37ad28bSAl Viro __be32 status; 3574fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3575dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35761da177e4SLinus Torvalds 35771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3578ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3579ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35801da177e4SLinus Torvalds 3581ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3582a8cddc5dSJ. Bruce Fields if (status) 3583a8cddc5dSJ. Bruce Fields return status; 35841da177e4SLinus Torvalds 35851da177e4SLinus Torvalds nfs4_lock_state(); 35861da177e4SLinus Torvalds 35879072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3588ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 35892288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 35909072d5c6SJ. Bruce Fields if (status) 35911da177e4SLinus Torvalds goto out; 3592fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 359368b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3594dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 359568b66e82SJ. Bruce Fields goto out; 3596dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3597dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3598dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 35998c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3600dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3601c7b9a459SNeilBrown 3602fe0750e5SJ. Bruce Fields nfsd4_create_clid_dir(oo->oo_owner.so_client); 360368b66e82SJ. Bruce Fields status = nfs_ok; 36041da177e4SLinus Torvalds out: 36055ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36061da177e4SLinus Torvalds nfs4_unlock_state(); 36071da177e4SLinus Torvalds return status; 36081da177e4SLinus Torvalds } 36091da177e4SLinus Torvalds 36106409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 36111da177e4SLinus Torvalds { 36126409a5a6SJ. Bruce Fields if (!test_bit(access, &stp->st_access_bmap)) 36136409a5a6SJ. Bruce Fields return; 36146409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 36156409a5a6SJ. Bruce Fields __clear_bit(access, &stp->st_access_bmap); 3616f197c271SJ. Bruce Fields } 36176409a5a6SJ. Bruce Fields 36186409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 36196409a5a6SJ. Bruce Fields { 36206409a5a6SJ. Bruce Fields switch (to_access) { 36216409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 36226409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 36236409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36246409a5a6SJ. Bruce Fields break; 36256409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 36266409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 36276409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 36286409a5a6SJ. Bruce Fields break; 36296409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 36306409a5a6SJ. Bruce Fields break; 36316409a5a6SJ. Bruce Fields default: 36326409a5a6SJ. Bruce Fields BUG(); 36331da177e4SLinus Torvalds } 36341da177e4SLinus Torvalds } 36351da177e4SLinus Torvalds 36361da177e4SLinus Torvalds static void 36371da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 36381da177e4SLinus Torvalds { 36391da177e4SLinus Torvalds int i; 36401da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 36411da177e4SLinus Torvalds if ((i & deny) != i) 36421da177e4SLinus Torvalds __clear_bit(i, bmap); 36431da177e4SLinus Torvalds } 36441da177e4SLinus Torvalds } 36451da177e4SLinus Torvalds 3646b37ad28bSAl Viro __be32 3647ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3648ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3649a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 36501da177e4SLinus Torvalds { 3651b37ad28bSAl Viro __be32 status; 3652dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3655ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3656ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36571da177e4SLinus Torvalds 3658c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 36592c8bd7e0SBenny Halevy if (od->od_deleg_want) 36602c8bd7e0SBenny Halevy dprintk("NFSD: %s: od_deleg_want=0x%x ignored\n", __func__, 36612c8bd7e0SBenny Halevy od->od_deleg_want); 36621da177e4SLinus Torvalds 36631da177e4SLinus Torvalds nfs4_lock_state(); 3664c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3665c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36669072d5c6SJ. Bruce Fields if (status) 36671da177e4SLinus Torvalds goto out; 36681da177e4SLinus Torvalds status = nfserr_inval; 36691da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 36701da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 36711da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36721da177e4SLinus Torvalds goto out; 36731da177e4SLinus Torvalds } 36741da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 36751da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36761da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 36771da177e4SLinus Torvalds goto out; 36781da177e4SLinus Torvalds } 36796409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 36801da177e4SLinus Torvalds 36811da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 36821da177e4SLinus Torvalds 3683dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3684dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36851da177e4SLinus Torvalds status = nfs_ok; 36861da177e4SLinus Torvalds out: 36875ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36881da177e4SLinus Torvalds nfs4_unlock_state(); 36891da177e4SLinus Torvalds return status; 36901da177e4SLinus Torvalds } 36911da177e4SLinus Torvalds 369238c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 369338c387b5SJ. Bruce Fields { 369438c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 369538c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 369638c387b5SJ. Bruce Fields 369738c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 369838c387b5SJ. Bruce Fields return; 369938c387b5SJ. Bruce Fields oo = openowner(so); 370038c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 370138c387b5SJ. Bruce Fields if (!s) 370238c387b5SJ. Bruce Fields return; 370338c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 370438c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 370538c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 370638c387b5SJ. Bruce Fields return; 370738c387b5SJ. Bruce Fields } 370838c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3709f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3710f7a4d872SJ. Bruce Fields } 3711f7a4d872SJ. Bruce Fields 3712f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3713f7a4d872SJ. Bruce Fields { 3714f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3715f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 371638c387b5SJ. Bruce Fields } 371738c387b5SJ. Bruce Fields 37181da177e4SLinus Torvalds /* 37191da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 37201da177e4SLinus Torvalds */ 3721b37ad28bSAl Viro __be32 3722ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3723a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 37241da177e4SLinus Torvalds { 3725b37ad28bSAl Viro __be32 status; 3726fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3727dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 37281da177e4SLinus Torvalds 37291da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3730ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3731ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 37321da177e4SLinus Torvalds 37331da177e4SLinus Torvalds nfs4_lock_state(); 3734f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3735f7a4d872SJ. Bruce Fields &close->cl_stateid, 3736f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3737f7a4d872SJ. Bruce Fields &stp); 37389072d5c6SJ. Bruce Fields if (status) 37391da177e4SLinus Torvalds goto out; 3740fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 37411da177e4SLinus Torvalds status = nfs_ok; 3742dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3743dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 37441da177e4SLinus Torvalds 3745f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 374638c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 374704ef5954SJ. Bruce Fields 374804ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 374904ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 375004ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 375104ef5954SJ. Bruce Fields */ 3752fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3753fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 37541da177e4SLinus Torvalds out: 37555ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 37561da177e4SLinus Torvalds nfs4_unlock_state(); 37571da177e4SLinus Torvalds return status; 37581da177e4SLinus Torvalds } 37591da177e4SLinus Torvalds 3760b37ad28bSAl Viro __be32 3761ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3762ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37631da177e4SLinus Torvalds { 3764203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3765203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 376638c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3767203a8c8eSJ. Bruce Fields struct inode *inode; 3768b37ad28bSAl Viro __be32 status; 37691da177e4SLinus Torvalds 3770ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3771203a8c8eSJ. Bruce Fields return status; 3772203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37731da177e4SLinus Torvalds 37741da177e4SLinus Torvalds nfs4_lock_state(); 377538c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 377638c2f4b1SJ. Bruce Fields if (status) 3777203a8c8eSJ. Bruce Fields goto out; 377838c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3779d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3780203a8c8eSJ. Bruce Fields if (status) 3781203a8c8eSJ. Bruce Fields goto out; 3782203a8c8eSJ. Bruce Fields 3783203a8c8eSJ. Bruce Fields unhash_delegation(dp); 37841da177e4SLinus Torvalds out: 3785203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3786203a8c8eSJ. Bruce Fields 37871da177e4SLinus Torvalds return status; 37881da177e4SLinus Torvalds } 37891da177e4SLinus Torvalds 37901da177e4SLinus Torvalds 37911da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 37921da177e4SLinus Torvalds 3793009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3794009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3795009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 37961da177e4SLinus Torvalds 379787df4de8SBenny Halevy static inline u64 379887df4de8SBenny Halevy end_offset(u64 start, u64 len) 379987df4de8SBenny Halevy { 380087df4de8SBenny Halevy u64 end; 380187df4de8SBenny Halevy 380287df4de8SBenny Halevy end = start + len; 380387df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 380487df4de8SBenny Halevy } 380587df4de8SBenny Halevy 380687df4de8SBenny Halevy /* last octet in a range */ 380787df4de8SBenny Halevy static inline u64 380887df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 380987df4de8SBenny Halevy { 381087df4de8SBenny Halevy u64 end; 381187df4de8SBenny Halevy 381287df4de8SBenny Halevy BUG_ON(!len); 381387df4de8SBenny Halevy end = start + len; 381487df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 381587df4de8SBenny Halevy } 381687df4de8SBenny Halevy 3817009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 38181da177e4SLinus Torvalds { 38191da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 38201da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3821009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 38221da177e4SLinus Torvalds } 38231da177e4SLinus Torvalds 3824009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 38251da177e4SLinus Torvalds 38261da177e4SLinus Torvalds /* 38271da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 38281da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 38291da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 38301da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 38311da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 38321da177e4SLinus Torvalds * the VFS, but this is a very deep change! 38331da177e4SLinus Torvalds */ 38341da177e4SLinus Torvalds static inline void 38351da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 38361da177e4SLinus Torvalds { 38371da177e4SLinus Torvalds if (lock->fl_start < 0) 38381da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 38391da177e4SLinus Torvalds if (lock->fl_end < 0) 38401da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 38411da177e4SLinus Torvalds } 38421da177e4SLinus Torvalds 3843d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3844d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 38457b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3846d5b9026aSNeilBrown }; 38471da177e4SLinus Torvalds 38481da177e4SLinus Torvalds static inline void 38491da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38501da177e4SLinus Torvalds { 3851fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38521da177e4SLinus Torvalds 3853d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3854fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3855fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3856fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 38577c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38587c13f344SJ. Bruce Fields /* We just don't care that much */ 38597c13f344SJ. Bruce Fields goto nevermind; 3860fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3861fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3862d5b9026aSNeilBrown } else { 38637c13f344SJ. Bruce Fields nevermind: 38647c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38657c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3866d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3867d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38681da177e4SLinus Torvalds } 38691da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 387087df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 387187df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38721da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38731da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38741da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38751da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38761da177e4SLinus Torvalds } 38771da177e4SLinus Torvalds 3878b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3879b93d87c1SJ. Bruce Fields { 3880b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3881b93d87c1SJ. Bruce Fields 3882b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3883b93d87c1SJ. Bruce Fields return false; 3884b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3885b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3886b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3887b93d87c1SJ. Bruce Fields } 3888b93d87c1SJ. Bruce Fields 3889fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3890fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 38911da177e4SLinus Torvalds struct xdr_netobj *owner) 38921da177e4SLinus Torvalds { 3893009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3894b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 38951da177e4SLinus Torvalds 3896009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3897b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3898b93d87c1SJ. Bruce Fields return lo; 38991da177e4SLinus Torvalds } 39001da177e4SLinus Torvalds return NULL; 39011da177e4SLinus Torvalds } 39021da177e4SLinus Torvalds 3903dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3904ff194bd9SJ. Bruce Fields { 3905009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3906009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3907009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3908009673b4SJ. Bruce Fields 390916bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3910009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3911fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3912ff194bd9SJ. Bruce Fields } 3913ff194bd9SJ. Bruce Fields 39141da177e4SLinus Torvalds /* 39151da177e4SLinus Torvalds * Alloc a lock owner structure. 39161da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 391725985edcSLucas De Marchi * occurred. 39181da177e4SLinus Torvalds * 391916bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 39201da177e4SLinus Torvalds */ 39211da177e4SLinus Torvalds 3922fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3923dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3924fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 39251da177e4SLinus Torvalds 3926fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3927fe0750e5SJ. Bruce Fields if (!lo) 39281da177e4SLinus Torvalds return NULL; 3929fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3930fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3931b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3932b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3933fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3934fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3935fe0750e5SJ. Bruce Fields return lo; 39361da177e4SLinus Torvalds } 39371da177e4SLinus Torvalds 3938dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3939dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 39401da177e4SLinus Torvalds { 3941dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3942d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 39431da177e4SLinus Torvalds 3944996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 39455ac049acSNeilBrown if (stp == NULL) 39466136d2b4SJ. Bruce Fields return NULL; 3947996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 39488beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3949fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3950fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 395113cd2184SNeilBrown get_nfs4_file(fp); 39521da177e4SLinus Torvalds stp->st_file = fp; 39530997b173SJ. Bruce Fields stp->st_access_bmap = 0; 39541da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 39554c4cd222SNeilBrown stp->st_openstp = open_stp; 39561da177e4SLinus Torvalds return stp; 39571da177e4SLinus Torvalds } 39581da177e4SLinus Torvalds 3959fd39ca9aSNeilBrown static int 39601da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39611da177e4SLinus Torvalds { 396287df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39631da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39641da177e4SLinus Torvalds } 39651da177e4SLinus Torvalds 3966dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39670997b173SJ. Bruce Fields { 39680997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39690997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39700997b173SJ. Bruce Fields 39710997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39720997b173SJ. Bruce Fields return; 39730997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 39740997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 39750997b173SJ. Bruce Fields } 39760997b173SJ. Bruce Fields 397764a284d0SJ. Bruce Fields __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) 397864a284d0SJ. Bruce Fields { 397964a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 398064a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 398164a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 398264a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 398364a284d0SJ. Bruce Fields unsigned int strhashval; 398464a284d0SJ. Bruce Fields 398564a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 398664a284d0SJ. Bruce Fields if (lo) { 398764a284d0SJ. Bruce Fields if (!cstate->minorversion) 398864a284d0SJ. Bruce Fields return nfserr_bad_seqid; 398964a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 399064a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 399164a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 399264a284d0SJ. Bruce Fields return nfs_ok; 399364a284d0SJ. Bruce Fields } 399416bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 399564a284d0SJ. Bruce Fields &lock->v.new.owner); 399664a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 399764a284d0SJ. Bruce Fields if (lo == NULL) 399864a284d0SJ. Bruce Fields return nfserr_jukebox; 399964a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 400064a284d0SJ. Bruce Fields if (*lst == NULL) { 400164a284d0SJ. Bruce Fields release_lockowner(lo); 400264a284d0SJ. Bruce Fields return nfserr_jukebox; 400364a284d0SJ. Bruce Fields } 400464a284d0SJ. Bruce Fields *new = true; 400564a284d0SJ. Bruce Fields return nfs_ok; 400664a284d0SJ. Bruce Fields } 400764a284d0SJ. Bruce Fields 40081da177e4SLinus Torvalds /* 40091da177e4SLinus Torvalds * LOCK operation 40101da177e4SLinus Torvalds */ 4011b37ad28bSAl Viro __be32 4012ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4013a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 40141da177e4SLinus Torvalds { 4015fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 4016fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 4017dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 40187d947842SJ. Bruce Fields struct nfs4_file *fp; 40197d947842SJ. Bruce Fields struct file *filp = NULL; 40201da177e4SLinus Torvalds struct file_lock file_lock; 40218dc7c311SAndy Adamson struct file_lock conflock; 4022b37ad28bSAl Viro __be32 status = 0; 402364a284d0SJ. Bruce Fields bool new_state = false; 4024b34f27aaSJ. Bruce Fields int lkflg; 4025b8dd7b9aSAl Viro int err; 40261da177e4SLinus Torvalds 40271da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 40281da177e4SLinus Torvalds (long long) lock->lk_offset, 40291da177e4SLinus Torvalds (long long) lock->lk_length); 40301da177e4SLinus Torvalds 40311da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 40321da177e4SLinus Torvalds return nfserr_inval; 40331da177e4SLinus Torvalds 4034ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 40358837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 4036a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 4037a6f6ef2fSAndy Adamson return status; 4038a6f6ef2fSAndy Adamson } 4039a6f6ef2fSAndy Adamson 40401da177e4SLinus Torvalds nfs4_lock_state(); 40411da177e4SLinus Torvalds 40421da177e4SLinus Torvalds if (lock->lk_is_new) { 40431da177e4SLinus Torvalds /* 40441da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 4045893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 4046893f8770SNeilBrown * lock stateid. 40471da177e4SLinus Torvalds */ 4048dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 40491da177e4SLinus Torvalds 4050684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 4051684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 4052684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 4053684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 4054684e5638SJ. Bruce Fields sizeof(clientid_t)); 4055684e5638SJ. Bruce Fields 40561da177e4SLinus Torvalds status = nfserr_stale_clientid; 4057684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40581da177e4SLinus Torvalds goto out; 40591da177e4SLinus Torvalds 40601da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4061c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40621da177e4SLinus Torvalds lock->lk_new_open_seqid, 40631da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4064c0a5d93eSJ. Bruce Fields &open_stp); 406537515177SNeilBrown if (status) 40661da177e4SLinus Torvalds goto out; 4067fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4068b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4069684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4070b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4071b34f27aaSJ. Bruce Fields goto out; 407264a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 407364a284d0SJ. Bruce Fields &lock_stp, &new_state); 407464a284d0SJ. Bruce Fields if (status) 40751da177e4SLinus Torvalds goto out; 40761da177e4SLinus Torvalds } else { 40771da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4078dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40791da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40801da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 40812288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 40821da177e4SLinus Torvalds if (status) 40831da177e4SLinus Torvalds goto out; 408464a284d0SJ. Bruce Fields } 4085fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 40867d947842SJ. Bruce Fields fp = lock_stp->st_file; 40871da177e4SLinus Torvalds 4088b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4089b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4090b34f27aaSJ. Bruce Fields if (status) 4091b34f27aaSJ. Bruce Fields goto out; 4092b34f27aaSJ. Bruce Fields 40930dd395dcSNeilBrown status = nfserr_grace; 4094af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40950dd395dcSNeilBrown goto out; 40960dd395dcSNeilBrown status = nfserr_no_grace; 4097af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40980dd395dcSNeilBrown goto out; 40990dd395dcSNeilBrown 41001da177e4SLinus Torvalds locks_init_lock(&file_lock); 41011da177e4SLinus Torvalds switch (lock->lk_type) { 41021da177e4SLinus Torvalds case NFS4_READ_LT: 41031da177e4SLinus Torvalds case NFS4_READW_LT: 4104f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 41050997b173SJ. Bruce Fields if (filp) 41060997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 41071da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41081da177e4SLinus Torvalds break; 41091da177e4SLinus Torvalds case NFS4_WRITE_LT: 41101da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4111f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 41120997b173SJ. Bruce Fields if (filp) 41130997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 41141da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41151da177e4SLinus Torvalds break; 41161da177e4SLinus Torvalds default: 41171da177e4SLinus Torvalds status = nfserr_inval; 41181da177e4SLinus Torvalds goto out; 41191da177e4SLinus Torvalds } 4120f9d7562fSJ. Bruce Fields if (!filp) { 4121f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4122f9d7562fSJ. Bruce Fields goto out; 4123f9d7562fSJ. Bruce Fields } 4124b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 41251da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41261da177e4SLinus Torvalds file_lock.fl_file = filp; 41271da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4128d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 41291da177e4SLinus Torvalds 41301da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 413187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 41321da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41331da177e4SLinus Torvalds 41341da177e4SLinus Torvalds /* 41351da177e4SLinus Torvalds * Try to lock the file in the VFS. 41361da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 41371da177e4SLinus Torvalds */ 41381da177e4SLinus Torvalds 4139529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4140b8dd7b9aSAl Viro switch (-err) { 41411da177e4SLinus Torvalds case 0: /* success! */ 4142dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4143dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 41441da177e4SLinus Torvalds sizeof(stateid_t)); 4145b8dd7b9aSAl Viro status = 0; 4146eb76b3fdSAndy Adamson break; 4147eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4148eb76b3fdSAndy Adamson status = nfserr_denied; 4149eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4150eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4151eb76b3fdSAndy Adamson break; 41521da177e4SLinus Torvalds case (EDEADLK): 41531da177e4SLinus Torvalds status = nfserr_deadlock; 4154eb76b3fdSAndy Adamson break; 41551da177e4SLinus Torvalds default: 4156fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 41573e772463SJ. Bruce Fields status = nfserrno(err); 4158eb76b3fdSAndy Adamson break; 41591da177e4SLinus Torvalds } 41601da177e4SLinus Torvalds out: 416164a284d0SJ. Bruce Fields if (status && new_state) 4162f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41635ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41641da177e4SLinus Torvalds nfs4_unlock_state(); 41651da177e4SLinus Torvalds return status; 41661da177e4SLinus Torvalds } 41671da177e4SLinus Torvalds 41681da177e4SLinus Torvalds /* 416955ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 417055ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 417155ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 417255ef1274SJ. Bruce Fields * inode operation.) 417355ef1274SJ. Bruce Fields */ 417455ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 417555ef1274SJ. Bruce Fields { 417655ef1274SJ. Bruce Fields struct file *file; 417755ef1274SJ. Bruce Fields int err; 417855ef1274SJ. Bruce Fields 417955ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 418055ef1274SJ. Bruce Fields if (err) 418155ef1274SJ. Bruce Fields return err; 418255ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 418355ef1274SJ. Bruce Fields nfsd_close(file); 418455ef1274SJ. Bruce Fields return err; 418555ef1274SJ. Bruce Fields } 418655ef1274SJ. Bruce Fields 418755ef1274SJ. Bruce Fields /* 41881da177e4SLinus Torvalds * LOCKT operation 41891da177e4SLinus Torvalds */ 4190b37ad28bSAl Viro __be32 4191ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4192ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41931da177e4SLinus Torvalds { 41941da177e4SLinus Torvalds struct inode *inode; 41951da177e4SLinus Torvalds struct file_lock file_lock; 4196fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4197fd85b817SMarc Eshel int error; 4198b37ad28bSAl Viro __be32 status; 41991da177e4SLinus Torvalds 4200af558e33SJ. Bruce Fields if (locks_in_grace()) 42011da177e4SLinus Torvalds return nfserr_grace; 42021da177e4SLinus Torvalds 42031da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 42041da177e4SLinus Torvalds return nfserr_inval; 42051da177e4SLinus Torvalds 42061da177e4SLinus Torvalds nfs4_lock_state(); 42071da177e4SLinus Torvalds 42081da177e4SLinus Torvalds status = nfserr_stale_clientid; 420960adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 42101da177e4SLinus Torvalds goto out; 42111da177e4SLinus Torvalds 421275c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 42131da177e4SLinus Torvalds goto out; 42141da177e4SLinus Torvalds 4215ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 42161da177e4SLinus Torvalds locks_init_lock(&file_lock); 42171da177e4SLinus Torvalds switch (lockt->lt_type) { 42181da177e4SLinus Torvalds case NFS4_READ_LT: 42191da177e4SLinus Torvalds case NFS4_READW_LT: 42201da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 42211da177e4SLinus Torvalds break; 42221da177e4SLinus Torvalds case NFS4_WRITE_LT: 42231da177e4SLinus Torvalds case NFS4_WRITEW_LT: 42241da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 42251da177e4SLinus Torvalds break; 42261da177e4SLinus Torvalds default: 42272fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 42281da177e4SLinus Torvalds status = nfserr_inval; 42291da177e4SLinus Torvalds goto out; 42301da177e4SLinus Torvalds } 42311da177e4SLinus Torvalds 4232fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4233fe0750e5SJ. Bruce Fields if (lo) 4234fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 42351da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42361da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 42371da177e4SLinus Torvalds 42381da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 423987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42421da177e4SLinus Torvalds 42431da177e4SLinus Torvalds status = nfs_ok; 424455ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4245fd85b817SMarc Eshel if (error) { 4246fd85b817SMarc Eshel status = nfserrno(error); 4247fd85b817SMarc Eshel goto out; 4248fd85b817SMarc Eshel } 42499d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 42501da177e4SLinus Torvalds status = nfserr_denied; 42519d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 42521da177e4SLinus Torvalds } 42531da177e4SLinus Torvalds out: 42541da177e4SLinus Torvalds nfs4_unlock_state(); 42551da177e4SLinus Torvalds return status; 42561da177e4SLinus Torvalds } 42571da177e4SLinus Torvalds 4258b37ad28bSAl Viro __be32 4259ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4260a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42611da177e4SLinus Torvalds { 4262dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42631da177e4SLinus Torvalds struct file *filp = NULL; 42641da177e4SLinus Torvalds struct file_lock file_lock; 4265b37ad28bSAl Viro __be32 status; 4266b8dd7b9aSAl Viro int err; 42671da177e4SLinus Torvalds 42681da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42691da177e4SLinus Torvalds (long long) locku->lu_offset, 42701da177e4SLinus Torvalds (long long) locku->lu_length); 42711da177e4SLinus Torvalds 42721da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42731da177e4SLinus Torvalds return nfserr_inval; 42741da177e4SLinus Torvalds 42751da177e4SLinus Torvalds nfs4_lock_state(); 42761da177e4SLinus Torvalds 42779072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 42782288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 42799072d5c6SJ. Bruce Fields if (status) 42801da177e4SLinus Torvalds goto out; 4281f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4282f9d7562fSJ. Bruce Fields if (!filp) { 4283f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4284f9d7562fSJ. Bruce Fields goto out; 4285f9d7562fSJ. Bruce Fields } 42861da177e4SLinus Torvalds BUG_ON(!filp); 42871da177e4SLinus Torvalds locks_init_lock(&file_lock); 42881da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4289fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 42901da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42911da177e4SLinus Torvalds file_lock.fl_file = filp; 42921da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4293d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42941da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42951da177e4SLinus Torvalds 429687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42971da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42981da177e4SLinus Torvalds 42991da177e4SLinus Torvalds /* 43001da177e4SLinus Torvalds * Try to unlock the file in the VFS. 43011da177e4SLinus Torvalds */ 4302fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4303b8dd7b9aSAl Viro if (err) { 4304fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 43051da177e4SLinus Torvalds goto out_nfserr; 43061da177e4SLinus Torvalds } 43071da177e4SLinus Torvalds /* 43081da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 43091da177e4SLinus Torvalds */ 4310dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4311dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 43121da177e4SLinus Torvalds 43131da177e4SLinus Torvalds out: 431471c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 43151da177e4SLinus Torvalds nfs4_unlock_state(); 43161da177e4SLinus Torvalds return status; 43171da177e4SLinus Torvalds 43181da177e4SLinus Torvalds out_nfserr: 4319b8dd7b9aSAl Viro status = nfserrno(err); 43201da177e4SLinus Torvalds goto out; 43211da177e4SLinus Torvalds } 43221da177e4SLinus Torvalds 43231da177e4SLinus Torvalds /* 43241da177e4SLinus Torvalds * returns 43251da177e4SLinus Torvalds * 1: locks held by lockowner 43261da177e4SLinus Torvalds * 0: no locks held by lockowner 43271da177e4SLinus Torvalds */ 43281da177e4SLinus Torvalds static int 4329fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 43301da177e4SLinus Torvalds { 43311da177e4SLinus Torvalds struct file_lock **flpp; 4332f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 43331da177e4SLinus Torvalds int status = 0; 43341da177e4SLinus Torvalds 4335b89f4321SArnd Bergmann lock_flocks(); 43361da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4337796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 43381da177e4SLinus Torvalds status = 1; 43391da177e4SLinus Torvalds goto out; 43401da177e4SLinus Torvalds } 4341796dadfdSJ. Bruce Fields } 43421da177e4SLinus Torvalds out: 4343b89f4321SArnd Bergmann unlock_flocks(); 43441da177e4SLinus Torvalds return status; 43451da177e4SLinus Torvalds } 43461da177e4SLinus Torvalds 4347b37ad28bSAl Viro __be32 4348b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4349b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4350b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 43511da177e4SLinus Torvalds { 43521da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 43533e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4354fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4355dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 43561da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 43573e9e3dbeSNeilBrown struct list_head matches; 435816bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4359b37ad28bSAl Viro __be32 status; 43601da177e4SLinus Torvalds 43611da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43621da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43631da177e4SLinus Torvalds 43641da177e4SLinus Torvalds /* XXX check for lease expiration */ 43651da177e4SLinus Torvalds 43661da177e4SLinus Torvalds status = nfserr_stale_clientid; 4367849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43681da177e4SLinus Torvalds return status; 43691da177e4SLinus Torvalds 43701da177e4SLinus Torvalds nfs4_lock_state(); 43711da177e4SLinus Torvalds 43721da177e4SLinus Torvalds status = nfserr_locks_held; 43733e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 437406f1f864SJ. Bruce Fields 437516bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 437616bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 437716bfdaafSJ. Bruce Fields continue; 4378599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43793e9e3dbeSNeilBrown continue; 43803e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4381ea1da636SNeilBrown st_perstateowner) { 4382fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4383fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 43841da177e4SLinus Torvalds goto out; 4385fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 43861da177e4SLinus Torvalds } 43873e9e3dbeSNeilBrown } 43883e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43893e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43903e9e3dbeSNeilBrown * have been checked. */ 43911da177e4SLinus Torvalds status = nfs_ok; 43920fa822e4SNeilBrown while (!list_empty(&matches)) { 4393fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4394fe0750e5SJ. Bruce Fields lo_list); 43950fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43960fa822e4SNeilBrown * for openowners. */ 4397fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4398fe0750e5SJ. Bruce Fields release_lockowner(lo); 43991da177e4SLinus Torvalds } 44001da177e4SLinus Torvalds out: 44011da177e4SLinus Torvalds nfs4_unlock_state(); 44021da177e4SLinus Torvalds return status; 44031da177e4SLinus Torvalds } 44041da177e4SLinus Torvalds 44051da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4406a55370a3SNeilBrown alloc_reclaim(void) 44071da177e4SLinus Torvalds { 4408a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 44091da177e4SLinus Torvalds } 44101da177e4SLinus Torvalds 4411c7b9a459SNeilBrown int 4412a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4413c7b9a459SNeilBrown { 4414c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4415c7b9a459SNeilBrown struct nfs4_client *clp; 4416c7b9a459SNeilBrown 4417e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4418*393d8ed8SJ. Bruce Fields if (!clp) 4419*393d8ed8SJ. Bruce Fields return 0; 4420*393d8ed8SJ. Bruce Fields return clp->cl_firststate; 4421c7b9a459SNeilBrown } 4422c7b9a459SNeilBrown 44231da177e4SLinus Torvalds /* 44241da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 44251da177e4SLinus Torvalds */ 4426190e4fbfSNeilBrown int 4427190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 44281da177e4SLinus Torvalds { 44291da177e4SLinus Torvalds unsigned int strhashval; 44301da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44311da177e4SLinus Torvalds 4432a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4433a55370a3SNeilBrown crp = alloc_reclaim(); 44341da177e4SLinus Torvalds if (!crp) 44351da177e4SLinus Torvalds return 0; 4436a55370a3SNeilBrown strhashval = clientstr_hashval(name); 44371da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 44381da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4439a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 44401da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 44411da177e4SLinus Torvalds return 1; 44421da177e4SLinus Torvalds } 44431da177e4SLinus Torvalds 44441da177e4SLinus Torvalds static void 44451da177e4SLinus Torvalds nfs4_release_reclaim(void) 44461da177e4SLinus Torvalds { 44471da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44481da177e4SLinus Torvalds int i; 44491da177e4SLinus Torvalds 44501da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44511da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 44521da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 44531da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 44541da177e4SLinus Torvalds list_del(&crp->cr_strhash); 44551da177e4SLinus Torvalds kfree(crp); 44561da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 44571da177e4SLinus Torvalds } 44581da177e4SLinus Torvalds } 44591da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44601da177e4SLinus Torvalds } 44611da177e4SLinus Torvalds 44621da177e4SLinus Torvalds /* 44631da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4464fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 44651da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 44661da177e4SLinus Torvalds { 44671da177e4SLinus Torvalds unsigned int strhashval; 44681da177e4SLinus Torvalds struct nfs4_client *clp; 44691da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44701da177e4SLinus Torvalds 44711da177e4SLinus Torvalds 44721da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 44731da177e4SLinus Torvalds clp = find_confirmed_client(clid); 44741da177e4SLinus Torvalds if (clp == NULL) 44751da177e4SLinus Torvalds return NULL; 44761da177e4SLinus Torvalds 4477a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4478a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4479a55370a3SNeilBrown clp->cl_recdir); 44801da177e4SLinus Torvalds 44811da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4482a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44831da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4484a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44851da177e4SLinus Torvalds return crp; 44861da177e4SLinus Torvalds } 44871da177e4SLinus Torvalds } 44881da177e4SLinus Torvalds return NULL; 44891da177e4SLinus Torvalds } 44901da177e4SLinus Torvalds 44911da177e4SLinus Torvalds /* 44921da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44931da177e4SLinus Torvalds */ 4494b37ad28bSAl Viro __be32 44951da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44961da177e4SLinus Torvalds { 4497dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44981da177e4SLinus Torvalds } 44991da177e4SLinus Torvalds 450065178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 450165178db4SBryan Schumaker 450265178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 450365178db4SBryan Schumaker { 450465178db4SBryan Schumaker struct nfs4_client *clp, *next; 450565178db4SBryan Schumaker int count = 0; 450665178db4SBryan Schumaker 450765178db4SBryan Schumaker nfs4_lock_state(); 450865178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 450965178db4SBryan Schumaker nfsd4_remove_clid_dir(clp); 451065178db4SBryan Schumaker expire_client(clp); 451165178db4SBryan Schumaker if (++count == num) 451265178db4SBryan Schumaker break; 451365178db4SBryan Schumaker } 451465178db4SBryan Schumaker nfs4_unlock_state(); 451565178db4SBryan Schumaker 451665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 451765178db4SBryan Schumaker } 451865178db4SBryan Schumaker 451965178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 452065178db4SBryan Schumaker { 452165178db4SBryan Schumaker release_lockowner(lockowner(sop)); 452265178db4SBryan Schumaker } 452365178db4SBryan Schumaker 452465178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 452565178db4SBryan Schumaker { 452665178db4SBryan Schumaker release_openowner(openowner(sop)); 452765178db4SBryan Schumaker } 452865178db4SBryan Schumaker 4529353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 453065178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 453165178db4SBryan Schumaker { 453265178db4SBryan Schumaker int i, count = 0; 453365178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 453465178db4SBryan Schumaker 453516bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 453616bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 453716bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 453816bfdaafSJ. Bruce Fields continue; 453965178db4SBryan Schumaker release_sop(sop); 454065178db4SBryan Schumaker if (++count == num) 454165178db4SBryan Schumaker return count; 454265178db4SBryan Schumaker } 454365178db4SBryan Schumaker } 454465178db4SBryan Schumaker return count; 454565178db4SBryan Schumaker } 454665178db4SBryan Schumaker 454765178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 454865178db4SBryan Schumaker { 454965178db4SBryan Schumaker int count; 455065178db4SBryan Schumaker 455165178db4SBryan Schumaker nfs4_lock_state(); 455216bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 455365178db4SBryan Schumaker nfs4_unlock_state(); 455465178db4SBryan Schumaker 455565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 455665178db4SBryan Schumaker } 455765178db4SBryan Schumaker 455865178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 455965178db4SBryan Schumaker { 456065178db4SBryan Schumaker int count; 456165178db4SBryan Schumaker 456265178db4SBryan Schumaker nfs4_lock_state(); 456316bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 456465178db4SBryan Schumaker nfs4_unlock_state(); 456565178db4SBryan Schumaker 456665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 456765178db4SBryan Schumaker } 456865178db4SBryan Schumaker 456965178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 457065178db4SBryan Schumaker { 457165178db4SBryan Schumaker int i, count = 0; 45722d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 45732d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 457465178db4SBryan Schumaker 457565178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 45762d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 45772d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 457865178db4SBryan Schumaker deleg_func(dp); 457965178db4SBryan Schumaker if (++count == num) 458065178db4SBryan Schumaker return count; 458165178db4SBryan Schumaker } 458265178db4SBryan Schumaker } 458365178db4SBryan Schumaker } 45842d3475c0SBryan Schumaker 458565178db4SBryan Schumaker return count; 458665178db4SBryan Schumaker } 458765178db4SBryan Schumaker 458865178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 458965178db4SBryan Schumaker { 459065178db4SBryan Schumaker unsigned int count; 459165178db4SBryan Schumaker 459265178db4SBryan Schumaker nfs4_lock_state(); 459365178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 459465178db4SBryan Schumaker nfs4_unlock_state(); 459565178db4SBryan Schumaker 459665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 459765178db4SBryan Schumaker } 459865178db4SBryan Schumaker 459965178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 460065178db4SBryan Schumaker { 460165178db4SBryan Schumaker unsigned int count; 460265178db4SBryan Schumaker 460365178db4SBryan Schumaker nfs4_lock_state(); 460465178db4SBryan Schumaker spin_lock(&recall_lock); 460565178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 460665178db4SBryan Schumaker spin_unlock(&recall_lock); 460765178db4SBryan Schumaker nfs4_unlock_state(); 460865178db4SBryan Schumaker 460965178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 461065178db4SBryan Schumaker } 461165178db4SBryan Schumaker 461265178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 461365178db4SBryan Schumaker 4614ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 46151da177e4SLinus Torvalds 461672083396SBryan Schumaker void 4617ac4d8ff2SNeilBrown nfs4_state_init(void) 46181da177e4SLinus Torvalds { 461972083396SBryan Schumaker int i; 46201da177e4SLinus Torvalds 46211da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46221da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 46231da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 46241da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 46251da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 462602cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 46271da177e4SLinus Torvalds } 46285282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 46295282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 46301da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 46311da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 46321da177e4SLinus Torvalds } 463316bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 463416bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 46351da177e4SLinus Torvalds } 4636009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4637009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 46381da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 46391da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 46401da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4641ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4642ac4d8ff2SNeilBrown } 4643ac4d8ff2SNeilBrown 4644190e4fbfSNeilBrown static void 4645190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4646190e4fbfSNeilBrown { 4647190e4fbfSNeilBrown int status; 4648190e4fbfSNeilBrown 46490964a3d3SNeilBrown nfs4_lock_state(); 465048483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4651190e4fbfSNeilBrown status = nfsd4_recdir_load(); 46520964a3d3SNeilBrown nfs4_unlock_state(); 4653190e4fbfSNeilBrown if (status) 4654190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4655190e4fbfSNeilBrown } 4656190e4fbfSNeilBrown 4657c2f1a551SMeelap Shah /* 4658c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4659c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4660c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4661c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4662c2f1a551SMeelap Shah * 4663c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4664c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4665c2f1a551SMeelap Shah */ 4666c2f1a551SMeelap Shah static void 4667c2f1a551SMeelap Shah set_max_delegations(void) 4668c2f1a551SMeelap Shah { 4669c2f1a551SMeelap Shah /* 4670c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4671c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4672c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4673c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4674c2f1a551SMeelap Shah */ 4675c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4676c2f1a551SMeelap Shah } 4677c2f1a551SMeelap Shah 4678ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4679ac4d8ff2SNeilBrown 468029ab23ccSJ. Bruce Fields static int 4681ac4d8ff2SNeilBrown __nfs4_state_start(void) 4682ac4d8ff2SNeilBrown { 4683b5a1a81eSJ. Bruce Fields int ret; 4684b5a1a81eSJ. Bruce Fields 46851da177e4SLinus Torvalds boot_time = get_seconds(); 4686af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 46879a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4688e46b498cSJ. Bruce Fields nfsd4_grace); 4689b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4690b5a1a81eSJ. Bruce Fields if (ret) 4691b5a1a81eSJ. Bruce Fields return -ENOMEM; 469258da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 469329ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 469429ab23ccSJ. Bruce Fields return -ENOMEM; 4695b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4696b5a1a81eSJ. Bruce Fields if (ret) 4697b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4698e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4699c2f1a551SMeelap Shah set_max_delegations(); 4700b5a1a81eSJ. Bruce Fields return 0; 4701b5a1a81eSJ. Bruce Fields out_free_laundry: 4702b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4703b5a1a81eSJ. Bruce Fields return ret; 47041da177e4SLinus Torvalds } 47051da177e4SLinus Torvalds 470629ab23ccSJ. Bruce Fields int 470776a3550eSNeilBrown nfs4_state_start(void) 47081da177e4SLinus Torvalds { 4709190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 47104ad9a344SJeff Layton return __nfs4_state_start(); 47111da177e4SLinus Torvalds } 47121da177e4SLinus Torvalds 47131da177e4SLinus Torvalds static void 47141da177e4SLinus Torvalds __nfs4_state_shutdown(void) 47151da177e4SLinus Torvalds { 47161da177e4SLinus Torvalds int i; 47171da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 47181da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 47191da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 47201da177e4SLinus Torvalds 47211da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 47221da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 47231da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 47241da177e4SLinus Torvalds expire_client(clp); 47251da177e4SLinus Torvalds } 47261da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 47271da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 47281da177e4SLinus Torvalds expire_client(clp); 47291da177e4SLinus Torvalds } 47301da177e4SLinus Torvalds } 47311da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 47321da177e4SLinus Torvalds spin_lock(&recall_lock); 47331da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 47341da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47351da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 47361da177e4SLinus Torvalds } 47371da177e4SLinus Torvalds spin_unlock(&recall_lock); 47381da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 47391da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 47401da177e4SLinus Torvalds unhash_delegation(dp); 47411da177e4SLinus Torvalds } 47421da177e4SLinus Torvalds 4743190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 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_release_reclaim(); 47541da177e4SLinus Torvalds __nfs4_state_shutdown(); 47551da177e4SLinus Torvalds nfs4_unlock_state(); 4756c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 47571da177e4SLinus Torvalds } 47588b70484cSTigran Mkrtchyan 47598b70484cSTigran Mkrtchyan static void 47608b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47618b70484cSTigran Mkrtchyan { 476237c593c5STigran Mkrtchyan if (HAS_STATE_ID(cstate, CURRENT_STATE_ID_FLAG) && CURRENT_STATEID(stateid)) 476337c593c5STigran Mkrtchyan memcpy(stateid, &cstate->current_stateid, sizeof(stateid_t)); 47648b70484cSTigran Mkrtchyan } 47658b70484cSTigran Mkrtchyan 47668b70484cSTigran Mkrtchyan static void 47678b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47688b70484cSTigran Mkrtchyan { 476937c593c5STigran Mkrtchyan if (cstate->minorversion) { 477037c593c5STigran Mkrtchyan memcpy(&cstate->current_stateid, stateid, sizeof(stateid_t)); 477137c593c5STigran Mkrtchyan SET_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 477237c593c5STigran Mkrtchyan } 477337c593c5STigran Mkrtchyan } 477437c593c5STigran Mkrtchyan 477537c593c5STigran Mkrtchyan void 477637c593c5STigran Mkrtchyan clear_current_stateid(struct nfsd4_compound_state *cstate) 477737c593c5STigran Mkrtchyan { 477837c593c5STigran Mkrtchyan CLEAR_STATE_ID(cstate, CURRENT_STATE_ID_FLAG); 47798b70484cSTigran Mkrtchyan } 47808b70484cSTigran Mkrtchyan 478162cd4a59STigran Mkrtchyan /* 478262cd4a59STigran Mkrtchyan * functions to set current state id 478362cd4a59STigran Mkrtchyan */ 47848b70484cSTigran Mkrtchyan void 47859428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 47869428fe1aSTigran Mkrtchyan { 47879428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 47889428fe1aSTigran Mkrtchyan } 47899428fe1aSTigran Mkrtchyan 47909428fe1aSTigran Mkrtchyan void 47918b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 47928b70484cSTigran Mkrtchyan { 47938b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 47948b70484cSTigran Mkrtchyan } 47958b70484cSTigran Mkrtchyan 47968b70484cSTigran Mkrtchyan void 479762cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 479862cd4a59STigran Mkrtchyan { 479962cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 480062cd4a59STigran Mkrtchyan } 480162cd4a59STigran Mkrtchyan 480262cd4a59STigran Mkrtchyan void 480362cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 480462cd4a59STigran Mkrtchyan { 480562cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 480662cd4a59STigran Mkrtchyan } 480762cd4a59STigran Mkrtchyan 480862cd4a59STigran Mkrtchyan /* 480962cd4a59STigran Mkrtchyan * functions to consume current state id 481062cd4a59STigran Mkrtchyan */ 48111e97b519STigran Mkrtchyan 48121e97b519STigran Mkrtchyan void 48139428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 48149428fe1aSTigran Mkrtchyan { 48159428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 48169428fe1aSTigran Mkrtchyan } 48179428fe1aSTigran Mkrtchyan 48189428fe1aSTigran Mkrtchyan void 48199428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 48209428fe1aSTigran Mkrtchyan { 48219428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 48229428fe1aSTigran Mkrtchyan } 48239428fe1aSTigran Mkrtchyan 48249428fe1aSTigran Mkrtchyan void 48251e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 48261e97b519STigran Mkrtchyan { 48271e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 48281e97b519STigran Mkrtchyan } 48291e97b519STigran Mkrtchyan 48301e97b519STigran Mkrtchyan void 48311e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 48321e97b519STigran Mkrtchyan { 48331e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 48341e97b519STigran Mkrtchyan } 48351e97b519STigran Mkrtchyan 483662cd4a59STigran Mkrtchyan void 48378b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 48388b70484cSTigran Mkrtchyan { 48398b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 48408b70484cSTigran Mkrtchyan } 48418b70484cSTigran Mkrtchyan 48428b70484cSTigran Mkrtchyan void 484362cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 48448b70484cSTigran Mkrtchyan { 484562cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 48468b70484cSTigran Mkrtchyan } 484730813e27STigran Mkrtchyan 484830813e27STigran Mkrtchyan void 484930813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 485030813e27STigran Mkrtchyan { 485130813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 485230813e27STigran Mkrtchyan } 485330813e27STigran Mkrtchyan 485430813e27STigran Mkrtchyan void 485530813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 485630813e27STigran Mkrtchyan { 485730813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 485830813e27STigran Mkrtchyan } 4859