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 share_access &= ~NFS4_SHARE_WANT_MASK; 264124a0111eSJ. Bruce Fields 264224a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 264324a0111eSJ. Bruce Fields } 264424a0111eSJ. Bruce Fields 264538c2f4b1SJ. Bruce Fields static struct nfs4_delegation *find_deleg_stateid(struct nfs4_client *cl, stateid_t *s) 2646f459e453SJ. Bruce Fields { 2647f459e453SJ. Bruce Fields struct nfs4_stid *ret; 2648f459e453SJ. Bruce Fields 264938c2f4b1SJ. Bruce Fields ret = find_stateid_by_type(cl, s, NFS4_DELEG_STID); 2650f459e453SJ. Bruce Fields if (!ret) 2651f459e453SJ. Bruce Fields return NULL; 2652f459e453SJ. Bruce Fields return delegstateid(ret); 2653f459e453SJ. Bruce Fields } 2654f459e453SJ. Bruce Fields 26558b289b2cSJ. Bruce Fields static bool nfsd4_is_deleg_cur(struct nfsd4_open *open) 26568b289b2cSJ. Bruce Fields { 26578b289b2cSJ. Bruce Fields return open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR || 26588b289b2cSJ. Bruce Fields open->op_claim_type == NFS4_OPEN_CLAIM_DELEG_CUR_FH; 26598b289b2cSJ. Bruce Fields } 26608b289b2cSJ. Bruce Fields 2661b37ad28bSAl Viro static __be32 266238c2f4b1SJ. Bruce Fields nfs4_check_deleg(struct nfs4_client *cl, struct nfs4_file *fp, struct nfsd4_open *open, 2663567d9829SNeilBrown struct nfs4_delegation **dp) 2664567d9829SNeilBrown { 2665567d9829SNeilBrown int flags; 2666b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2667567d9829SNeilBrown 266838c2f4b1SJ. Bruce Fields *dp = find_deleg_stateid(cl, &open->op_delegate_stateid); 2669567d9829SNeilBrown if (*dp == NULL) 2670c44c5eebSNeilBrown goto out; 267124a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2672567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2673567d9829SNeilBrown if (status) 2674567d9829SNeilBrown *dp = NULL; 2675c44c5eebSNeilBrown out: 26768b289b2cSJ. Bruce Fields if (!nfsd4_is_deleg_cur(open)) 2677c44c5eebSNeilBrown return nfs_ok; 2678c44c5eebSNeilBrown if (status) 2679c44c5eebSNeilBrown return status; 2680dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2681c44c5eebSNeilBrown return nfs_ok; 2682567d9829SNeilBrown } 2683567d9829SNeilBrown 2684b37ad28bSAl Viro static __be32 2685dcef0413SJ. Bruce Fields nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_ol_stateid **stpp) 26861da177e4SLinus Torvalds { 2687dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *local; 2688fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 26891da177e4SLinus Torvalds 26908beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 26911da177e4SLinus Torvalds /* ignore lock owners */ 26921da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 26931da177e4SLinus Torvalds continue; 26941da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2695fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 26961da177e4SLinus Torvalds *stpp = local; 26971da177e4SLinus Torvalds /* check for conflicting share reservations */ 26981da177e4SLinus Torvalds if (!test_share(local, open)) 269977eaae8dSJ. Bruce Fields return nfserr_share_denied; 27001da177e4SLinus Torvalds } 270177eaae8dSJ. Bruce Fields return nfs_ok; 27021da177e4SLinus Torvalds } 27031da177e4SLinus Torvalds 2704996e0938SJ. Bruce Fields static void nfs4_free_stateid(struct nfs4_ol_stateid *s) 2705996e0938SJ. Bruce Fields { 2706996e0938SJ. Bruce Fields kmem_cache_free(stateid_slab, s); 27075ac049acSNeilBrown } 27085ac049acSNeilBrown 270921fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 271021fb4016SJ. Bruce Fields { 271121fb4016SJ. Bruce Fields int flags = 0; 271221fb4016SJ. Bruce Fields 271321fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 271421fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 271521fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 271621fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 271721fb4016SJ. Bruce Fields return flags; 271821fb4016SJ. Bruce Fields } 271921fb4016SJ. Bruce Fields 27200c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 27210c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2722f9d7562fSJ. Bruce Fields { 2723f9d7562fSJ. Bruce Fields __be32 status; 27240c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 27250c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 27260c12eaffSCasey Bodley 2727f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2728f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2729f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2730f9d7562fSJ. Bruce Fields if (status) 2731f9d7562fSJ. Bruce Fields return status; 2732f9d7562fSJ. Bruce Fields } 2733f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2734f9d7562fSJ. Bruce Fields 2735f9d7562fSJ. Bruce Fields return nfs_ok; 2736f9d7562fSJ. Bruce Fields } 2737f9d7562fSJ. Bruce Fields 2738b37ad28bSAl Viro static inline __be32 27391da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 27401da177e4SLinus Torvalds struct nfsd4_open *open) 27411da177e4SLinus Torvalds { 27421da177e4SLinus Torvalds struct iattr iattr = { 27431da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 27441da177e4SLinus Torvalds .ia_size = 0, 27451da177e4SLinus Torvalds }; 27461da177e4SLinus Torvalds if (!open->op_truncate) 27471da177e4SLinus Torvalds return 0; 27481da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 27499246585aSAl Viro return nfserr_inval; 27501da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 27511da177e4SLinus Torvalds } 27521da177e4SLinus Torvalds 2753b37ad28bSAl Viro static __be32 2754dcef0413SJ. 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) 27551da177e4SLinus Torvalds { 2756b6d2f1caSJ. Bruce Fields u32 op_share_access = open->op_share_access; 27577d947842SJ. Bruce Fields bool new_access; 2758b37ad28bSAl Viro __be32 status; 27591da177e4SLinus Torvalds 27607d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2761f9d7562fSJ. Bruce Fields if (new_access) { 27620c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2763f9d7562fSJ. Bruce Fields if (status) 2764f9d7562fSJ. Bruce Fields return status; 27656c26d08fSJ. Bruce Fields } 27661da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 27671da177e4SLinus Torvalds if (status) { 2768f9d7562fSJ. Bruce Fields if (new_access) { 2769f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2770f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2771f9d7562fSJ. Bruce Fields } 27721da177e4SLinus Torvalds return status; 27731da177e4SLinus Torvalds } 27741da177e4SLinus Torvalds /* remember the open */ 277524a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2776b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27771da177e4SLinus Torvalds 27781da177e4SLinus Torvalds return nfs_ok; 27791da177e4SLinus Torvalds } 27801da177e4SLinus Torvalds 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds static void 278337515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 27841da177e4SLinus Torvalds { 2785dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 2786fe0750e5SJ. Bruce Fields open->op_openowner->oo_owner.so_client->cl_firststate = 1; 27871da177e4SLinus Torvalds } 27881da177e4SLinus Torvalds 278914a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 279014a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 279114a24e99SJ. Bruce Fields { 279214a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 279314a24e99SJ. Bruce Fields return true; 279414a24e99SJ. Bruce Fields /* 279514a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 279614a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 279714a24e99SJ. Bruce Fields * until we hear otherwise: 279814a24e99SJ. Bruce Fields */ 279914a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 280014a24e99SJ. Bruce Fields } 280114a24e99SJ. Bruce Fields 280222d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 280322d38c4cSJ. Bruce Fields { 280422d38c4cSJ. Bruce Fields struct file_lock *fl; 280522d38c4cSJ. Bruce Fields 280622d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 280722d38c4cSJ. Bruce Fields if (!fl) 280822d38c4cSJ. Bruce Fields return NULL; 280922d38c4cSJ. Bruce Fields locks_init_lock(fl); 281022d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 281122d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 281222d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 281322d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2814acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 281522d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 281622d38c4cSJ. Bruce Fields return fl; 281722d38c4cSJ. Bruce Fields } 281822d38c4cSJ. Bruce Fields 2819edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2820edab9782SJ. Bruce Fields { 2821acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2822edab9782SJ. Bruce Fields struct file_lock *fl; 2823edab9782SJ. Bruce Fields int status; 2824edab9782SJ. Bruce Fields 2825edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2826edab9782SJ. Bruce Fields if (!fl) 2827edab9782SJ. Bruce Fields return -ENOMEM; 2828acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 28292a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2830acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2831edab9782SJ. Bruce Fields if (status) { 2832acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2833edab9782SJ. Bruce Fields locks_free_lock(fl); 2834edab9782SJ. Bruce Fields return -ENOMEM; 2835edab9782SJ. Bruce Fields } 2836acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2837acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2838acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2839acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2840acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2841acfdf5c3SJ. Bruce Fields return 0; 2842acfdf5c3SJ. Bruce Fields } 2843acfdf5c3SJ. Bruce Fields 2844acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2845acfdf5c3SJ. Bruce Fields { 2846acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2847acfdf5c3SJ. Bruce Fields 2848acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2849acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2850acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2851acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2852acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2853acfdf5c3SJ. Bruce Fields return -EAGAIN; 2854acfdf5c3SJ. Bruce Fields } 2855acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2856acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2857acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 28582a74aba7SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_stid.sc_client->cl_delegations); 2859edab9782SJ. Bruce Fields return 0; 2860edab9782SJ. Bruce Fields } 2861edab9782SJ. Bruce Fields 28621da177e4SLinus Torvalds /* 28631da177e4SLinus Torvalds * Attempt to hand out a delegation. 28641da177e4SLinus Torvalds */ 28651da177e4SLinus Torvalds static void 2866dcef0413SJ. Bruce Fields nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_ol_stateid *stp) 28671da177e4SLinus Torvalds { 28681da177e4SLinus Torvalds struct nfs4_delegation *dp; 2869fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 287014a24e99SJ. Bruce Fields int cb_up; 28711da177e4SLinus Torvalds int status, flag = 0; 28721da177e4SLinus Torvalds 2873fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28741da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28757b190fecSNeilBrown open->op_recall = 0; 28767b190fecSNeilBrown switch (open->op_claim_type) { 28777b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28782bf23875SJ. Bruce Fields if (!cb_up) 28797b190fecSNeilBrown open->op_recall = 1; 28807b190fecSNeilBrown flag = open->op_delegate_type; 28817b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28821da177e4SLinus Torvalds goto out; 28837b190fecSNeilBrown break; 28847b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28857b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28867b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2887af558e33SJ. Bruce Fields if (locks_in_grace()) 28887b190fecSNeilBrown goto out; 2889dad1c067SJ. Bruce Fields if (!cb_up || !(oo->oo_flags & NFS4_OO_CONFIRMED)) 28907b190fecSNeilBrown goto out; 28911da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28921da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28931da177e4SLinus Torvalds else 28941da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28957b190fecSNeilBrown break; 28967b190fecSNeilBrown default: 28977b190fecSNeilBrown goto out; 28987b190fecSNeilBrown } 28991da177e4SLinus Torvalds 2900fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2901dd239cc0SJ. Bruce Fields if (dp == NULL) 2902dd239cc0SJ. Bruce Fields goto out_no_deleg; 2903acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2904edab9782SJ. Bruce Fields if (status) 2905dd239cc0SJ. Bruce Fields goto out_free; 29061da177e4SLinus Torvalds 2907d5477a8dSJ. Bruce Fields memcpy(&open->op_delegate_stateid, &dp->dl_stid.sc_stateid, sizeof(dp->dl_stid.sc_stateid)); 29081da177e4SLinus Torvalds 29098c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 2910d5477a8dSJ. Bruce Fields STATEID_VAL(&dp->dl_stid.sc_stateid)); 29111da177e4SLinus Torvalds out: 29127b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 29137b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 29147b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 29152fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 29161da177e4SLinus Torvalds open->op_delegate_type = flag; 2917dd239cc0SJ. Bruce Fields return; 2918dd239cc0SJ. Bruce Fields out_free: 2919acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2920dd239cc0SJ. Bruce Fields out_no_deleg: 2921dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2922dd239cc0SJ. Bruce Fields goto out; 29231da177e4SLinus Torvalds } 29241da177e4SLinus Torvalds 29251da177e4SLinus Torvalds /* 29261da177e4SLinus Torvalds * called with nfs4_lock_state() held. 29271da177e4SLinus Torvalds */ 2928b37ad28bSAl Viro __be32 29291da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 29301da177e4SLinus Torvalds { 29316668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 293238c2f4b1SJ. Bruce Fields struct nfs4_client *cl = open->op_openowner->oo_owner.so_client; 29331da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 29341da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2935dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 2936567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2937b37ad28bSAl Viro __be32 status; 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds /* 29401da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 29411da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 29421da177e4SLinus Torvalds * If not found, create the nfs4_file struct 29431da177e4SLinus Torvalds */ 29441da177e4SLinus Torvalds fp = find_file(ino); 29451da177e4SLinus Torvalds if (fp) { 29461da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 29471da177e4SLinus Torvalds goto out; 294838c2f4b1SJ. Bruce Fields status = nfs4_check_deleg(cl, fp, open, &dp); 2949c44c5eebSNeilBrown if (status) 2950c44c5eebSNeilBrown goto out; 29511da177e4SLinus Torvalds } else { 2952c44c5eebSNeilBrown status = nfserr_bad_stateid; 29538b289b2cSJ. Bruce Fields if (nfsd4_is_deleg_cur(open)) 2954c44c5eebSNeilBrown goto out; 29553e772463SJ. Bruce Fields status = nfserr_jukebox; 295632513b40SJ. Bruce Fields fp = open->op_file; 295732513b40SJ. Bruce Fields open->op_file = NULL; 295832513b40SJ. Bruce Fields nfsd4_init_file(fp, ino); 29591da177e4SLinus Torvalds } 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds /* 29621da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 29631da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 29641da177e4SLinus Torvalds */ 29651da177e4SLinus Torvalds if (stp) { 29661da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2967f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 29681da177e4SLinus Torvalds if (status) 29691da177e4SLinus Torvalds goto out; 29701da177e4SLinus Torvalds } else { 29714cdc951bSJ. Bruce Fields status = nfs4_get_vfs_file(rqstp, fp, current_fh, open); 2972567d9829SNeilBrown if (status) 29731da177e4SLinus Torvalds goto out; 29744cdc951bSJ. Bruce Fields stp = open->op_stp; 29754cdc951bSJ. Bruce Fields open->op_stp = NULL; 2976996e0938SJ. Bruce Fields init_open_stateid(stp, fp, open); 29771da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 29781da177e4SLinus Torvalds if (status) { 29792283963fSJ. Bruce Fields release_open_stateid(stp); 29801da177e4SLinus Torvalds goto out; 29811da177e4SLinus Torvalds } 29821da177e4SLinus Torvalds } 2983dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 2984dcef0413SJ. Bruce Fields memcpy(&open->op_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 29851da177e4SLinus Torvalds 29864dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 2987dad1c067SJ. Bruce Fields open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED; 29886668958fSAndy Adamson 29891da177e4SLinus Torvalds /* 29901da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 29911da177e4SLinus Torvalds * OPEN succeeds even if we fail. 29921da177e4SLinus Torvalds */ 29931da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 29941da177e4SLinus Torvalds 29951da177e4SLinus Torvalds status = nfs_ok; 29961da177e4SLinus Torvalds 29978c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 2998dcef0413SJ. Bruce Fields STATEID_VAL(&stp->st_stid.sc_stateid)); 29991da177e4SLinus Torvalds out: 300013cd2184SNeilBrown if (fp) 300113cd2184SNeilBrown put_nfs4_file(fp); 300237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 300337515177SNeilBrown nfs4_set_claim_prev(open); 30041da177e4SLinus Torvalds /* 30051da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 30061da177e4SLinus Torvalds */ 30071da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 3008dad1c067SJ. Bruce Fields if (!(open->op_openowner->oo_flags & NFS4_OO_CONFIRMED) && 30096668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 30101da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 30111da177e4SLinus Torvalds 30121da177e4SLinus Torvalds return status; 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds 3015d29b20cdSJ. Bruce Fields void nfsd4_cleanup_open_state(struct nfsd4_open *open, __be32 status) 3016d29b20cdSJ. Bruce Fields { 3017d29b20cdSJ. Bruce Fields if (open->op_openowner) { 3018d29b20cdSJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 3019d29b20cdSJ. Bruce Fields 3020d29b20cdSJ. Bruce Fields if (!list_empty(&oo->oo_owner.so_stateids)) 3021d29b20cdSJ. Bruce Fields list_del_init(&oo->oo_close_lru); 3022d29b20cdSJ. Bruce Fields if (oo->oo_flags & NFS4_OO_NEW) { 3023d29b20cdSJ. Bruce Fields if (status) { 3024d29b20cdSJ. Bruce Fields release_openowner(oo); 3025d29b20cdSJ. Bruce Fields open->op_openowner = NULL; 3026d29b20cdSJ. Bruce Fields } else 3027d29b20cdSJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_NEW; 3028d29b20cdSJ. Bruce Fields } 3029d29b20cdSJ. Bruce Fields } 303032513b40SJ. Bruce Fields if (open->op_file) 303132513b40SJ. Bruce Fields nfsd4_free_file(open->op_file); 30324cdc951bSJ. Bruce Fields if (open->op_stp) 30334cdc951bSJ. Bruce Fields nfs4_free_stateid(open->op_stp); 3034d29b20cdSJ. Bruce Fields } 3035d29b20cdSJ. Bruce Fields 3036b37ad28bSAl Viro __be32 3037b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3038b591480bSJ.Bruce Fields clientid_t *clid) 30391da177e4SLinus Torvalds { 30401da177e4SLinus Torvalds struct nfs4_client *clp; 3041b37ad28bSAl Viro __be32 status; 30421da177e4SLinus Torvalds 30431da177e4SLinus Torvalds nfs4_lock_state(); 30441da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 30451da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30461da177e4SLinus Torvalds status = nfserr_stale_clientid; 30471da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 30481da177e4SLinus Torvalds goto out; 30491da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30501da177e4SLinus Torvalds status = nfserr_expired; 30511da177e4SLinus Torvalds if (clp == NULL) { 30521da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 30531da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 30541da177e4SLinus Torvalds goto out; 30551da177e4SLinus Torvalds } 30561da177e4SLinus Torvalds status = nfserr_cb_path_down; 3057ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 305877a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 30591da177e4SLinus Torvalds goto out; 30601da177e4SLinus Torvalds status = nfs_ok; 30611da177e4SLinus Torvalds out: 30621da177e4SLinus Torvalds nfs4_unlock_state(); 30631da177e4SLinus Torvalds return status; 30641da177e4SLinus Torvalds } 30651da177e4SLinus Torvalds 3066c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 3067af558e33SJ. Bruce Fields }; 3068af558e33SJ. Bruce Fields 3069a76b4319SNeilBrown static void 3070af558e33SJ. Bruce Fields nfsd4_end_grace(void) 3071a76b4319SNeilBrown { 3072a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 3073c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 3074af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 3075e46b498cSJ. Bruce Fields /* 3076e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 3077e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 3078e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 3079e46b498cSJ. Bruce Fields */ 3080e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 3081a76b4319SNeilBrown } 3082a76b4319SNeilBrown 3083fd39ca9aSNeilBrown static time_t 30841da177e4SLinus Torvalds nfs4_laundromat(void) 30851da177e4SLinus Torvalds { 30861da177e4SLinus Torvalds struct nfs4_client *clp; 3087fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 30881da177e4SLinus Torvalds struct nfs4_delegation *dp; 30891da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3090cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3091cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3092cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 30931da177e4SLinus Torvalds 30941da177e4SLinus Torvalds nfs4_lock_state(); 30951da177e4SLinus Torvalds 30961da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3097af558e33SJ. Bruce Fields if (locks_in_grace()) 3098af558e33SJ. Bruce Fields nfsd4_end_grace(); 309936acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 310036acb66bSBenny Halevy spin_lock(&client_lock); 31011da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 31021da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 31031da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 31041da177e4SLinus Torvalds t = clp->cl_time - cutoff; 31051da177e4SLinus Torvalds if (clientid_val > t) 31061da177e4SLinus Torvalds clientid_val = t; 31071da177e4SLinus Torvalds break; 31081da177e4SLinus Torvalds } 3109d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3110d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3111d7682988SBenny Halevy clp->cl_clientid.cl_id); 3112d7682988SBenny Halevy continue; 3113d7682988SBenny Halevy } 3114d7682988SBenny Halevy unhash_client_locked(clp); 3115d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 311636acb66bSBenny Halevy } 311736acb66bSBenny Halevy spin_unlock(&client_lock); 311836acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 311936acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 31201da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 31211da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3122c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 31231da177e4SLinus Torvalds expire_client(clp); 31241da177e4SLinus Torvalds } 31251da177e4SLinus Torvalds spin_lock(&recall_lock); 31261da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 31271da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31281da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 31291da177e4SLinus Torvalds u = dp->dl_time - cutoff; 31301da177e4SLinus Torvalds if (test_val > u) 31311da177e4SLinus Torvalds test_val = u; 31321da177e4SLinus Torvalds break; 31331da177e4SLinus Torvalds } 31341da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds spin_unlock(&recall_lock); 31371da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 31381da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 31391da177e4SLinus Torvalds unhash_delegation(dp); 31401da177e4SLinus Torvalds } 3141cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 31421da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3143fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3144fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3145fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 31461da177e4SLinus Torvalds if (test_val > u) 31471da177e4SLinus Torvalds test_val = u; 31481da177e4SLinus Torvalds break; 31491da177e4SLinus Torvalds } 3150fe0750e5SJ. Bruce Fields release_openowner(oo); 31511da177e4SLinus Torvalds } 31521da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 31531da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 31541da177e4SLinus Torvalds nfs4_unlock_state(); 31551da177e4SLinus Torvalds return clientid_val; 31561da177e4SLinus Torvalds } 31571da177e4SLinus Torvalds 3158a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3159a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3160a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3161a254b246SHarvey Harrison 3162a254b246SHarvey Harrison static void 3163c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 31641da177e4SLinus Torvalds { 31651da177e4SLinus Torvalds time_t t; 31661da177e4SLinus Torvalds 31671da177e4SLinus Torvalds t = nfs4_laundromat(); 31681da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 316958da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 31701da177e4SLinus Torvalds } 31711da177e4SLinus Torvalds 3172f7a4d872SJ. Bruce Fields static inline __be32 nfs4_check_fh(struct svc_fh *fhp, struct nfs4_ol_stateid *stp) 3173f8816512SNeilBrown { 3174f7a4d872SJ. Bruce Fields if (fhp->fh_dentry->d_inode != stp->st_file->fi_inode) 3175f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3176f7a4d872SJ. Bruce Fields return nfs_ok; 31771da177e4SLinus Torvalds } 31781da177e4SLinus Torvalds 31791da177e4SLinus Torvalds static int 31801da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 31811da177e4SLinus Torvalds { 3182d3b313a4SJ. Bruce Fields if (stateid->si_opaque.so_clid.cl_boot == boot_time) 3183e4e83ea4SJ. Bruce Fields return 0; 31848c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 31858c10cbdbSBenny Halevy STATEID_VAL(stateid)); 31861da177e4SLinus Torvalds return 1; 31871da177e4SLinus Torvalds } 31881da177e4SLinus Torvalds 31891da177e4SLinus Torvalds static inline int 31901da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 31911da177e4SLinus Torvalds { 31921da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 31931da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 31941da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 31951da177e4SLinus Torvalds } 31961da177e4SLinus Torvalds 31971da177e4SLinus Torvalds static inline int 31981da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 31991da177e4SLinus Torvalds { 32001da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 32011da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 32021da177e4SLinus Torvalds } 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds static 3205dcef0413SJ. Bruce Fields __be32 nfs4_check_openmode(struct nfs4_ol_stateid *stp, int flags) 32061da177e4SLinus Torvalds { 3207b37ad28bSAl Viro __be32 status = nfserr_openmode; 32081da177e4SLinus Torvalds 320902921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 321002921914SJ. Bruce Fields if (stp->st_openstp) 321102921914SJ. Bruce Fields stp = stp->st_openstp; 32121da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 32131da177e4SLinus Torvalds goto out; 32141da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 32151da177e4SLinus Torvalds goto out; 32161da177e4SLinus Torvalds status = nfs_ok; 32171da177e4SLinus Torvalds out: 32181da177e4SLinus Torvalds return status; 32191da177e4SLinus Torvalds } 32201da177e4SLinus Torvalds 3221b37ad28bSAl Viro static inline __be32 32221da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 32231da177e4SLinus Torvalds { 3224203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 32251da177e4SLinus Torvalds return nfs_ok; 3226af558e33SJ. Bruce Fields else if (locks_in_grace()) { 322725985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 32281da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 32291da177e4SLinus Torvalds return nfserr_grace; 32301da177e4SLinus Torvalds } else if (flags & WR_STATE) 32311da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32321da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 32331da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 32341da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 32351da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 32381da177e4SLinus Torvalds /* 32391da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 32401da177e4SLinus Torvalds * that are not able to provide mandatory locking. 32411da177e4SLinus Torvalds */ 32421da177e4SLinus Torvalds static inline int 324318f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 32441da177e4SLinus Torvalds { 3245203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds 324881b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 324981b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 325081b82965SJ. Bruce Fields { 325181b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 325281b82965SJ. Bruce Fields } 325381b82965SJ. Bruce Fields 325428dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 32550836f587SJ. Bruce Fields { 32566668958fSAndy Adamson /* 32576668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 32586668958fSAndy Adamson * when it is zero. 32596668958fSAndy Adamson */ 326028dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 326181b82965SJ. Bruce Fields return nfs_ok; 326281b82965SJ. Bruce Fields 326381b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 326481b82965SJ. Bruce Fields return nfs_ok; 32656668958fSAndy Adamson 32660836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 326781b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 32680836f587SJ. Bruce Fields return nfserr_bad_stateid; 32690836f587SJ. Bruce Fields /* 327081b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 327181b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 327281b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 327381b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 327481b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 327581b82965SJ. Bruce Fields * but better performance may result in retrying IO that 327681b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 327781b82965SJ. Bruce Fields * reordered in flight: 32780836f587SJ. Bruce Fields */ 32790836f587SJ. Bruce Fields return nfserr_old_stateid; 32800836f587SJ. Bruce Fields } 32810836f587SJ. Bruce Fields 328238c2f4b1SJ. Bruce Fields __be32 nfs4_validate_stateid(struct nfs4_client *cl, stateid_t *stateid) 328317456804SBryan Schumaker { 328497b7e3b6SJ. Bruce Fields struct nfs4_stid *s; 328597b7e3b6SJ. Bruce Fields struct nfs4_ol_stateid *ols; 328697b7e3b6SJ. Bruce Fields __be32 status; 328717456804SBryan Schumaker 328817456804SBryan Schumaker if (STALE_STATEID(stateid)) 328997b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 329017456804SBryan Schumaker 329138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 329297b7e3b6SJ. Bruce Fields if (!s) 329397b7e3b6SJ. Bruce Fields return nfserr_stale_stateid; 329436279ac1SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, 1); 329517456804SBryan Schumaker if (status) 329617456804SBryan Schumaker return status; 329797b7e3b6SJ. Bruce Fields if (!(s->sc_type & (NFS4_OPEN_STID | NFS4_LOCK_STID))) 329897b7e3b6SJ. Bruce Fields return nfs_ok; 329997b7e3b6SJ. Bruce Fields ols = openlockstateid(s); 330097b7e3b6SJ. Bruce Fields if (ols->st_stateowner->so_is_open_owner 3301dad1c067SJ. Bruce Fields && !(openowner(ols->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 330297b7e3b6SJ. Bruce Fields return nfserr_bad_stateid; 330397b7e3b6SJ. Bruce Fields return nfs_ok; 330417456804SBryan Schumaker } 330517456804SBryan Schumaker 330638c2f4b1SJ. Bruce Fields static __be32 nfsd4_lookup_stateid(stateid_t *stateid, unsigned char typemask, struct nfs4_stid **s) 330738c2f4b1SJ. Bruce Fields { 330838c2f4b1SJ. Bruce Fields struct nfs4_client *cl; 330938c2f4b1SJ. Bruce Fields 331038c2f4b1SJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 331138c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 331238c2f4b1SJ. Bruce Fields if (STALE_STATEID(stateid)) 331338c2f4b1SJ. Bruce Fields return nfserr_stale_stateid; 331438c2f4b1SJ. Bruce Fields cl = find_confirmed_client(&stateid->si_opaque.so_clid); 331538c2f4b1SJ. Bruce Fields if (!cl) 331638c2f4b1SJ. Bruce Fields return nfserr_expired; 331738c2f4b1SJ. Bruce Fields *s = find_stateid_by_type(cl, stateid, typemask); 331838c2f4b1SJ. Bruce Fields if (!*s) 331938c2f4b1SJ. Bruce Fields return nfserr_bad_stateid; 332038c2f4b1SJ. Bruce Fields return nfs_ok; 332138c2f4b1SJ. Bruce Fields 332238c2f4b1SJ. Bruce Fields } 332338c2f4b1SJ. Bruce Fields 33241da177e4SLinus Torvalds /* 33251da177e4SLinus Torvalds * Checks for stateid operations 33261da177e4SLinus Torvalds */ 3327b37ad28bSAl Viro __be32 3328dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3329dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 33301da177e4SLinus Torvalds { 333169064a27SJ. Bruce Fields struct nfs4_stid *s; 3332dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp = NULL; 33331da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3334dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 33351da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3336b37ad28bSAl Viro __be32 status; 33371da177e4SLinus Torvalds 33381da177e4SLinus Torvalds if (filpp) 33391da177e4SLinus Torvalds *filpp = NULL; 33401da177e4SLinus Torvalds 334118f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 33421da177e4SLinus Torvalds return nfserr_grace; 33431da177e4SLinus Torvalds 33441da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 33451da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 33461da177e4SLinus Torvalds 334738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID|NFS4_OPEN_STID|NFS4_LOCK_STID, &s); 334838c2f4b1SJ. Bruce Fields if (status) 334938c2f4b1SJ. Bruce Fields return status; 335069064a27SJ. Bruce Fields status = check_stateid_generation(stateid, &s->sc_stateid, nfsd4_has_session(cstate)); 33510c2a498fSJ. Bruce Fields if (status) 33520c2a498fSJ. Bruce Fields goto out; 3353f7a4d872SJ. Bruce Fields switch (s->sc_type) { 3354f7a4d872SJ. Bruce Fields case NFS4_DELEG_STID: 335569064a27SJ. Bruce Fields dp = delegstateid(s); 3356dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3357dc9bf700SJ. Bruce Fields if (status) 3358dc9bf700SJ. Bruce Fields goto out; 335943b0178eSDan Carpenter if (filpp) { 3360acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3361f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 336243b0178eSDan Carpenter } 3363f7a4d872SJ. Bruce Fields break; 3364f7a4d872SJ. Bruce Fields case NFS4_OPEN_STID: 3365f7a4d872SJ. Bruce Fields case NFS4_LOCK_STID: 336669064a27SJ. Bruce Fields stp = openlockstateid(s); 3367f7a4d872SJ. Bruce Fields status = nfs4_check_fh(current_fh, stp); 3368f7a4d872SJ. Bruce Fields if (status) 33691da177e4SLinus Torvalds goto out; 3370fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3371dad1c067SJ. Bruce Fields && !(openowner(stp->st_stateowner)->oo_flags & NFS4_OO_CONFIRMED)) 33721da177e4SLinus Torvalds goto out; 3373a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3374a4455be0SJ. Bruce Fields if (status) 33751da177e4SLinus Torvalds goto out; 3376f9d7562fSJ. Bruce Fields if (filpp) { 3377f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3378f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3379f9d7562fSJ. Bruce Fields else 3380f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3381f9d7562fSJ. Bruce Fields } 3382f7a4d872SJ. Bruce Fields break; 3383f7a4d872SJ. Bruce Fields default: 3384f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 33851da177e4SLinus Torvalds } 33861da177e4SLinus Torvalds status = nfs_ok; 33871da177e4SLinus Torvalds out: 33881da177e4SLinus Torvalds return status; 33891da177e4SLinus Torvalds } 33901da177e4SLinus Torvalds 3391e1ca12dfSBryan Schumaker static __be32 3392dcef0413SJ. Bruce Fields nfsd4_free_lock_stateid(struct nfs4_ol_stateid *stp) 3393e1ca12dfSBryan Schumaker { 3394fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3395e1ca12dfSBryan Schumaker return nfserr_locks_held; 3396e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3397e1ca12dfSBryan Schumaker return nfs_ok; 3398e1ca12dfSBryan Schumaker } 3399e1ca12dfSBryan Schumaker 3400e1ca12dfSBryan Schumaker /* 340117456804SBryan Schumaker * Test if the stateid is valid 340217456804SBryan Schumaker */ 340317456804SBryan Schumaker __be32 340417456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 340517456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 340617456804SBryan Schumaker { 340736279ac1SJ. Bruce Fields /* real work is done during encoding */ 340817456804SBryan Schumaker return nfs_ok; 340917456804SBryan Schumaker } 341017456804SBryan Schumaker 3411e1ca12dfSBryan Schumaker __be32 3412e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3413e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3414e1ca12dfSBryan Schumaker { 3415e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 34162da1cec7SJ. Bruce Fields struct nfs4_stid *s; 341738c2f4b1SJ. Bruce Fields struct nfs4_client *cl = cstate->session->se_client; 34182da1cec7SJ. Bruce Fields __be32 ret = nfserr_bad_stateid; 3419e1ca12dfSBryan Schumaker 3420e1ca12dfSBryan Schumaker nfs4_lock_state(); 342138c2f4b1SJ. Bruce Fields s = find_stateid(cl, stateid); 34222da1cec7SJ. Bruce Fields if (!s) 3423e1ca12dfSBryan Schumaker goto out; 34242da1cec7SJ. Bruce Fields switch (s->sc_type) { 34252da1cec7SJ. Bruce Fields case NFS4_DELEG_STID: 3426e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3427e1ca12dfSBryan Schumaker goto out; 34282da1cec7SJ. Bruce Fields case NFS4_OPEN_STID: 34292da1cec7SJ. Bruce Fields case NFS4_LOCK_STID: 34302da1cec7SJ. Bruce Fields ret = check_stateid_generation(stateid, &s->sc_stateid, 1); 34312da1cec7SJ. Bruce Fields if (ret) 3432e1ca12dfSBryan Schumaker goto out; 34332da1cec7SJ. Bruce Fields if (s->sc_type == NFS4_LOCK_STID) 34342da1cec7SJ. Bruce Fields ret = nfsd4_free_lock_stateid(openlockstateid(s)); 34352da1cec7SJ. Bruce Fields else 34362da1cec7SJ. Bruce Fields ret = nfserr_locks_held; 3437f7a4d872SJ. Bruce Fields break; 3438f7a4d872SJ. Bruce Fields default: 3439f7a4d872SJ. Bruce Fields ret = nfserr_bad_stateid; 3440e1ca12dfSBryan Schumaker } 3441e1ca12dfSBryan Schumaker out: 3442e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3443e1ca12dfSBryan Schumaker return ret; 3444e1ca12dfSBryan Schumaker } 3445e1ca12dfSBryan Schumaker 34464c4cd222SNeilBrown static inline int 34474c4cd222SNeilBrown setlkflg (int type) 34484c4cd222SNeilBrown { 34494c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 34504c4cd222SNeilBrown RD_STATE : WR_STATE; 34514c4cd222SNeilBrown } 34521da177e4SLinus Torvalds 3453dcef0413SJ. Bruce Fields static __be32 nfs4_seqid_op_checks(struct nfsd4_compound_state *cstate, stateid_t *stateid, u32 seqid, struct nfs4_ol_stateid *stp) 3454c0a5d93eSJ. Bruce Fields { 3455c0a5d93eSJ. Bruce Fields struct svc_fh *current_fh = &cstate->current_fh; 3456c0a5d93eSJ. Bruce Fields struct nfs4_stateowner *sop = stp->st_stateowner; 3457c0a5d93eSJ. Bruce Fields __be32 status; 3458c0a5d93eSJ. Bruce Fields 3459c0a5d93eSJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 3460c0a5d93eSJ. Bruce Fields if (status) 3461c0a5d93eSJ. Bruce Fields return status; 3462f7a4d872SJ. Bruce Fields if (stp->st_stid.sc_type == NFS4_CLOSED_STID) 3463f7a4d872SJ. Bruce Fields /* 3464f7a4d872SJ. Bruce Fields * "Closed" stateid's exist *only* to return 3465f7a4d872SJ. Bruce Fields * nfserr_replay_me from the previous step. 3466f7a4d872SJ. Bruce Fields */ 3467f7a4d872SJ. Bruce Fields return nfserr_bad_stateid; 3468f7a4d872SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stid.sc_stateid, nfsd4_has_session(cstate)); 3469f7a4d872SJ. Bruce Fields if (status) 3470f7a4d872SJ. Bruce Fields return status; 3471f7a4d872SJ. Bruce Fields return nfs4_check_fh(current_fh, stp); 3472c0a5d93eSJ. Bruce Fields } 3473c0a5d93eSJ. Bruce Fields 34741da177e4SLinus Torvalds /* 34751da177e4SLinus Torvalds * Checks for sequence id mutating operations. 34761da177e4SLinus Torvalds */ 3477b37ad28bSAl Viro static __be32 3478dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 34792288d0e3SJ. Bruce Fields stateid_t *stateid, char typemask, 3480dcef0413SJ. Bruce Fields struct nfs4_ol_stateid **stpp) 34811da177e4SLinus Torvalds { 34820836f587SJ. Bruce Fields __be32 status; 348338c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 34841da177e4SLinus Torvalds 34858c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 34868c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 34871da177e4SLinus Torvalds 34881da177e4SLinus Torvalds *stpp = NULL; 348938c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, typemask, &s); 3490c0a5d93eSJ. Bruce Fields if (status) 3491c0a5d93eSJ. Bruce Fields return status; 349238c2f4b1SJ. Bruce Fields *stpp = openlockstateid(s); 3493c0a5d93eSJ. Bruce Fields cstate->replay_owner = (*stpp)->st_stateowner; 34941da177e4SLinus Torvalds 3495c0a5d93eSJ. Bruce Fields return nfs4_seqid_op_checks(cstate, stateid, seqid, *stpp); 34961da177e4SLinus Torvalds } 34971da177e4SLinus Torvalds 3498dcef0413SJ. Bruce Fields static __be32 nfs4_preprocess_confirmed_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, stateid_t *stateid, struct nfs4_ol_stateid **stpp) 3499c0a5d93eSJ. Bruce Fields { 3500c0a5d93eSJ. Bruce Fields __be32 status; 3501c0a5d93eSJ. Bruce Fields struct nfs4_openowner *oo; 35021da177e4SLinus Torvalds 3503c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, seqid, stateid, 35042288d0e3SJ. Bruce Fields NFS4_OPEN_STID, stpp); 35050836f587SJ. Bruce Fields if (status) 35060836f587SJ. Bruce Fields return status; 3507c0a5d93eSJ. Bruce Fields oo = openowner((*stpp)->st_stateowner); 3508dad1c067SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_CONFIRMED)) 3509c0a5d93eSJ. Bruce Fields return nfserr_bad_stateid; 35103a4f98bbSNeilBrown return nfs_ok; 35111da177e4SLinus Torvalds } 35121da177e4SLinus Torvalds 3513b37ad28bSAl Viro __be32 3514ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3515a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 35161da177e4SLinus Torvalds { 3517b37ad28bSAl Viro __be32 status; 3518fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3519dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35201da177e4SLinus Torvalds 35211da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3522ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3523ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35241da177e4SLinus Torvalds 3525ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3526a8cddc5dSJ. Bruce Fields if (status) 3527a8cddc5dSJ. Bruce Fields return status; 35281da177e4SLinus Torvalds 35291da177e4SLinus Torvalds nfs4_lock_state(); 35301da177e4SLinus Torvalds 35319072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3532ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 35332288d0e3SJ. Bruce Fields NFS4_OPEN_STID, &stp); 35349072d5c6SJ. Bruce Fields if (status) 35351da177e4SLinus Torvalds goto out; 3536fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 353768b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3538dad1c067SJ. Bruce Fields if (oo->oo_flags & NFS4_OO_CONFIRMED) 353968b66e82SJ. Bruce Fields goto out; 3540dad1c067SJ. Bruce Fields oo->oo_flags |= NFS4_OO_CONFIRMED; 3541dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3542dcef0413SJ. Bruce Fields memcpy(&oc->oc_resp_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 35438c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 3544dcef0413SJ. Bruce Fields __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stid.sc_stateid)); 3545c7b9a459SNeilBrown 3546fe0750e5SJ. Bruce Fields nfsd4_create_clid_dir(oo->oo_owner.so_client); 354768b66e82SJ. Bruce Fields status = nfs_ok; 35481da177e4SLinus Torvalds out: 35495ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 35501da177e4SLinus Torvalds nfs4_unlock_state(); 35511da177e4SLinus Torvalds return status; 35521da177e4SLinus Torvalds } 35531da177e4SLinus Torvalds 35546409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade_bit(struct nfs4_ol_stateid *stp, u32 access) 35551da177e4SLinus Torvalds { 35566409a5a6SJ. Bruce Fields if (!test_bit(access, &stp->st_access_bmap)) 35576409a5a6SJ. Bruce Fields return; 35586409a5a6SJ. Bruce Fields nfs4_file_put_access(stp->st_file, nfs4_access_to_omode(access)); 35596409a5a6SJ. Bruce Fields __clear_bit(access, &stp->st_access_bmap); 3560f197c271SJ. Bruce Fields } 35616409a5a6SJ. Bruce Fields 35626409a5a6SJ. Bruce Fields static inline void nfs4_stateid_downgrade(struct nfs4_ol_stateid *stp, u32 to_access) 35636409a5a6SJ. Bruce Fields { 35646409a5a6SJ. Bruce Fields switch (to_access) { 35656409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 35666409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_WRITE); 35676409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 35686409a5a6SJ. Bruce Fields break; 35696409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 35706409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_READ); 35716409a5a6SJ. Bruce Fields nfs4_stateid_downgrade_bit(stp, NFS4_SHARE_ACCESS_BOTH); 35726409a5a6SJ. Bruce Fields break; 35736409a5a6SJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 35746409a5a6SJ. Bruce Fields break; 35756409a5a6SJ. Bruce Fields default: 35766409a5a6SJ. Bruce Fields BUG(); 35771da177e4SLinus Torvalds } 35781da177e4SLinus Torvalds } 35791da177e4SLinus Torvalds 35801da177e4SLinus Torvalds static void 35811da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 35821da177e4SLinus Torvalds { 35831da177e4SLinus Torvalds int i; 35841da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 35851da177e4SLinus Torvalds if ((i & deny) != i) 35861da177e4SLinus Torvalds __clear_bit(i, bmap); 35871da177e4SLinus Torvalds } 35881da177e4SLinus Torvalds } 35891da177e4SLinus Torvalds 3590b37ad28bSAl Viro __be32 3591ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3592ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3593a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 35941da177e4SLinus Torvalds { 3595b37ad28bSAl Viro __be32 status; 3596dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 35971da177e4SLinus Torvalds 35981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3599ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3600ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36011da177e4SLinus Torvalds 3602c30e92dfSJ. Bruce Fields /* We don't yet support WANT bits: */ 3603c30e92dfSJ. Bruce Fields od->od_share_access &= NFS4_SHARE_ACCESS_MASK; 36041da177e4SLinus Torvalds 36051da177e4SLinus Torvalds nfs4_lock_state(); 3606c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, od->od_seqid, 3607c0a5d93eSJ. Bruce Fields &od->od_stateid, &stp); 36089072d5c6SJ. Bruce Fields if (status) 36091da177e4SLinus Torvalds goto out; 36101da177e4SLinus Torvalds status = nfserr_inval; 36111da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 36121da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 36131da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 36141da177e4SLinus Torvalds goto out; 36151da177e4SLinus Torvalds } 36161da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 36171da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 36181da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 36191da177e4SLinus Torvalds goto out; 36201da177e4SLinus Torvalds } 36216409a5a6SJ. Bruce Fields nfs4_stateid_downgrade(stp, od->od_share_access); 36221da177e4SLinus Torvalds 36231da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 36241da177e4SLinus Torvalds 3625dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3626dcef0413SJ. Bruce Fields memcpy(&od->od_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36271da177e4SLinus Torvalds status = nfs_ok; 36281da177e4SLinus Torvalds out: 36295ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36301da177e4SLinus Torvalds nfs4_unlock_state(); 36311da177e4SLinus Torvalds return status; 36321da177e4SLinus Torvalds } 36331da177e4SLinus Torvalds 363438c387b5SJ. Bruce Fields void nfsd4_purge_closed_stateid(struct nfs4_stateowner *so) 363538c387b5SJ. Bruce Fields { 363638c387b5SJ. Bruce Fields struct nfs4_openowner *oo; 363738c387b5SJ. Bruce Fields struct nfs4_ol_stateid *s; 363838c387b5SJ. Bruce Fields 363938c387b5SJ. Bruce Fields if (!so->so_is_open_owner) 364038c387b5SJ. Bruce Fields return; 364138c387b5SJ. Bruce Fields oo = openowner(so); 364238c387b5SJ. Bruce Fields s = oo->oo_last_closed_stid; 364338c387b5SJ. Bruce Fields if (!s) 364438c387b5SJ. Bruce Fields return; 364538c387b5SJ. Bruce Fields if (!(oo->oo_flags & NFS4_OO_PURGE_CLOSE)) { 364638c387b5SJ. Bruce Fields /* Release the last_closed_stid on the next seqid bump: */ 364738c387b5SJ. Bruce Fields oo->oo_flags |= NFS4_OO_PURGE_CLOSE; 364838c387b5SJ. Bruce Fields return; 364938c387b5SJ. Bruce Fields } 365038c387b5SJ. Bruce Fields oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE; 3651f7a4d872SJ. Bruce Fields release_last_closed_stateid(oo); 3652f7a4d872SJ. Bruce Fields } 3653f7a4d872SJ. Bruce Fields 3654f7a4d872SJ. Bruce Fields static void nfsd4_close_open_stateid(struct nfs4_ol_stateid *s) 3655f7a4d872SJ. Bruce Fields { 3656f7a4d872SJ. Bruce Fields unhash_open_stateid(s); 3657f7a4d872SJ. Bruce Fields s->st_stid.sc_type = NFS4_CLOSED_STID; 365838c387b5SJ. Bruce Fields } 365938c387b5SJ. Bruce Fields 36601da177e4SLinus Torvalds /* 36611da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 36621da177e4SLinus Torvalds */ 3663b37ad28bSAl Viro __be32 3664ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3665a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 36661da177e4SLinus Torvalds { 3667b37ad28bSAl Viro __be32 status; 3668fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 3669dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 36701da177e4SLinus Torvalds 36711da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3672ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3673ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 36741da177e4SLinus Torvalds 36751da177e4SLinus Torvalds nfs4_lock_state(); 3676f7a4d872SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 3677f7a4d872SJ. Bruce Fields &close->cl_stateid, 3678f7a4d872SJ. Bruce Fields NFS4_OPEN_STID|NFS4_CLOSED_STID, 3679f7a4d872SJ. Bruce Fields &stp); 36809072d5c6SJ. Bruce Fields if (status) 36811da177e4SLinus Torvalds goto out; 3682fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 36831da177e4SLinus Torvalds status = nfs_ok; 3684dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 3685dcef0413SJ. Bruce Fields memcpy(&close->cl_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 36861da177e4SLinus Torvalds 3687f7a4d872SJ. Bruce Fields nfsd4_close_open_stateid(stp); 368838c387b5SJ. Bruce Fields oo->oo_last_closed_stid = stp; 368904ef5954SJ. Bruce Fields 369004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 369104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 369204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 369304ef5954SJ. Bruce Fields */ 3694fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3695fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 36961da177e4SLinus Torvalds out: 36975ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36981da177e4SLinus Torvalds nfs4_unlock_state(); 36991da177e4SLinus Torvalds return status; 37001da177e4SLinus Torvalds } 37011da177e4SLinus Torvalds 3702b37ad28bSAl Viro __be32 3703ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3704ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 37051da177e4SLinus Torvalds { 3706203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3707203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 370838c2f4b1SJ. Bruce Fields struct nfs4_stid *s; 3709203a8c8eSJ. Bruce Fields struct inode *inode; 3710b37ad28bSAl Viro __be32 status; 37111da177e4SLinus Torvalds 3712ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3713203a8c8eSJ. Bruce Fields return status; 3714203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37151da177e4SLinus Torvalds 37161da177e4SLinus Torvalds nfs4_lock_state(); 371738c2f4b1SJ. Bruce Fields status = nfsd4_lookup_stateid(stateid, NFS4_DELEG_STID, &s); 371838c2f4b1SJ. Bruce Fields if (status) 3719203a8c8eSJ. Bruce Fields goto out; 372038c2f4b1SJ. Bruce Fields dp = delegstateid(s); 3721d5477a8dSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stid.sc_stateid, nfsd4_has_session(cstate)); 3722203a8c8eSJ. Bruce Fields if (status) 3723203a8c8eSJ. Bruce Fields goto out; 3724203a8c8eSJ. Bruce Fields 3725203a8c8eSJ. Bruce Fields unhash_delegation(dp); 37261da177e4SLinus Torvalds out: 3727203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3728203a8c8eSJ. Bruce Fields 37291da177e4SLinus Torvalds return status; 37301da177e4SLinus Torvalds } 37311da177e4SLinus Torvalds 37321da177e4SLinus Torvalds 37331da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 37341da177e4SLinus Torvalds 3735009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_BITS 8 3736009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_SIZE (1 << LOCKOWNER_INO_HASH_BITS) 3737009673b4SJ. Bruce Fields #define LOCKOWNER_INO_HASH_MASK (LOCKOWNER_INO_HASH_SIZE - 1) 37381da177e4SLinus Torvalds 373987df4de8SBenny Halevy static inline u64 374087df4de8SBenny Halevy end_offset(u64 start, u64 len) 374187df4de8SBenny Halevy { 374287df4de8SBenny Halevy u64 end; 374387df4de8SBenny Halevy 374487df4de8SBenny Halevy end = start + len; 374587df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 374687df4de8SBenny Halevy } 374787df4de8SBenny Halevy 374887df4de8SBenny Halevy /* last octet in a range */ 374987df4de8SBenny Halevy static inline u64 375087df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 375187df4de8SBenny Halevy { 375287df4de8SBenny Halevy u64 end; 375387df4de8SBenny Halevy 375487df4de8SBenny Halevy BUG_ON(!len); 375587df4de8SBenny Halevy end = start + len; 375687df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 375787df4de8SBenny Halevy } 375887df4de8SBenny Halevy 3759009673b4SJ. Bruce Fields static unsigned int lockowner_ino_hashval(struct inode *inode, u32 cl_id, struct xdr_netobj *ownername) 37601da177e4SLinus Torvalds { 37611da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 37621da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 3763009673b4SJ. Bruce Fields & LOCKOWNER_INO_HASH_MASK; 37641da177e4SLinus Torvalds } 37651da177e4SLinus Torvalds 3766009673b4SJ. Bruce Fields static struct list_head lockowner_ino_hashtbl[LOCKOWNER_INO_HASH_SIZE]; 37671da177e4SLinus Torvalds 37681da177e4SLinus Torvalds /* 37691da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 37701da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 37711da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 37721da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 37731da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 37741da177e4SLinus Torvalds * the VFS, but this is a very deep change! 37751da177e4SLinus Torvalds */ 37761da177e4SLinus Torvalds static inline void 37771da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 37781da177e4SLinus Torvalds { 37791da177e4SLinus Torvalds if (lock->fl_start < 0) 37801da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 37811da177e4SLinus Torvalds if (lock->fl_end < 0) 37821da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 37831da177e4SLinus Torvalds } 37841da177e4SLinus Torvalds 3785d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3786d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 37877b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3788d5b9026aSNeilBrown }; 37891da177e4SLinus Torvalds 37901da177e4SLinus Torvalds static inline void 37911da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 37921da177e4SLinus Torvalds { 3793fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 37941da177e4SLinus Torvalds 3795d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3796fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3797fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3798fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 37997c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 38007c13f344SJ. Bruce Fields /* We just don't care that much */ 38017c13f344SJ. Bruce Fields goto nevermind; 3802fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3803fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3804d5b9026aSNeilBrown } else { 38057c13f344SJ. Bruce Fields nevermind: 38067c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 38077c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3808d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3809d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38101da177e4SLinus Torvalds } 38111da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 381287df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 381387df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38141da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38151da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38161da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38171da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38181da177e4SLinus Torvalds } 38191da177e4SLinus Torvalds 3820b93d87c1SJ. Bruce Fields static bool same_lockowner_ino(struct nfs4_lockowner *lo, struct inode *inode, clientid_t *clid, struct xdr_netobj *owner) 3821b93d87c1SJ. Bruce Fields { 3822b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid *lst; 3823b93d87c1SJ. Bruce Fields 3824b93d87c1SJ. Bruce Fields if (!same_owner_str(&lo->lo_owner, owner, clid)) 3825b93d87c1SJ. Bruce Fields return false; 3826b93d87c1SJ. Bruce Fields lst = list_first_entry(&lo->lo_owner.so_stateids, 3827b93d87c1SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 3828b93d87c1SJ. Bruce Fields return lst->st_file->fi_inode == inode; 3829b93d87c1SJ. Bruce Fields } 3830b93d87c1SJ. Bruce Fields 3831fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3832fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 38331da177e4SLinus Torvalds struct xdr_netobj *owner) 38341da177e4SLinus Torvalds { 3835009673b4SJ. Bruce Fields unsigned int hashval = lockowner_ino_hashval(inode, clid->cl_id, owner); 3836b93d87c1SJ. Bruce Fields struct nfs4_lockowner *lo; 38371da177e4SLinus Torvalds 3838009673b4SJ. Bruce Fields list_for_each_entry(lo, &lockowner_ino_hashtbl[hashval], lo_owner_ino_hash) { 3839b93d87c1SJ. Bruce Fields if (same_lockowner_ino(lo, inode, clid, owner)) 3840b93d87c1SJ. Bruce Fields return lo; 38411da177e4SLinus Torvalds } 38421da177e4SLinus Torvalds return NULL; 38431da177e4SLinus Torvalds } 38441da177e4SLinus Torvalds 3845dcef0413SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp) 3846ff194bd9SJ. Bruce Fields { 3847009673b4SJ. Bruce Fields struct inode *inode = open_stp->st_file->fi_inode; 3848009673b4SJ. Bruce Fields unsigned int inohash = lockowner_ino_hashval(inode, 3849009673b4SJ. Bruce Fields clp->cl_clientid.cl_id, &lo->lo_owner.so_owner); 3850009673b4SJ. Bruce Fields 385116bfdaafSJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &ownerstr_hashtbl[strhashval]); 3852009673b4SJ. Bruce Fields list_add(&lo->lo_owner_ino_hash, &lockowner_ino_hashtbl[inohash]); 3853fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3854ff194bd9SJ. Bruce Fields } 3855ff194bd9SJ. Bruce Fields 38561da177e4SLinus Torvalds /* 38571da177e4SLinus Torvalds * Alloc a lock owner structure. 38581da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 385925985edcSLucas De Marchi * occurred. 38601da177e4SLinus Torvalds * 386116bfdaafSJ. Bruce Fields * strhashval = ownerstr_hashval 38621da177e4SLinus Torvalds */ 38631da177e4SLinus Torvalds 3864fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3865dcef0413SJ. Bruce Fields alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_ol_stateid *open_stp, struct nfsd4_lock *lock) { 3866fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38671da177e4SLinus Torvalds 3868fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3869fe0750e5SJ. Bruce Fields if (!lo) 38701da177e4SLinus Torvalds return NULL; 3871fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3872fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3873b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3874b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3875fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3876fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3877fe0750e5SJ. Bruce Fields return lo; 38781da177e4SLinus Torvalds } 38791da177e4SLinus Torvalds 3880dcef0413SJ. Bruce Fields static struct nfs4_ol_stateid * 3881dcef0413SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_ol_stateid *open_stp) 38821da177e4SLinus Torvalds { 3883dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 3884d3b313a4SJ. Bruce Fields struct nfs4_client *clp = lo->lo_owner.so_client; 38851da177e4SLinus Torvalds 3886996e0938SJ. Bruce Fields stp = nfs4_alloc_stateid(clp); 38875ac049acSNeilBrown if (stp == NULL) 38886136d2b4SJ. Bruce Fields return NULL; 3889996e0938SJ. Bruce Fields init_stid(&stp->st_stid, clp, NFS4_LOCK_STID); 38908beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3891fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3892fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 389313cd2184SNeilBrown get_nfs4_file(fp); 38941da177e4SLinus Torvalds stp->st_file = fp; 38950997b173SJ. Bruce Fields stp->st_access_bmap = 0; 38961da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 38974c4cd222SNeilBrown stp->st_openstp = open_stp; 38981da177e4SLinus Torvalds return stp; 38991da177e4SLinus Torvalds } 39001da177e4SLinus Torvalds 3901fd39ca9aSNeilBrown static int 39021da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39031da177e4SLinus Torvalds { 390487df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39051da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39061da177e4SLinus Torvalds } 39071da177e4SLinus Torvalds 3908dcef0413SJ. Bruce Fields static void get_lock_access(struct nfs4_ol_stateid *lock_stp, u32 access) 39090997b173SJ. Bruce Fields { 39100997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39110997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39120997b173SJ. Bruce Fields 39130997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39140997b173SJ. Bruce Fields return; 39150997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 39160997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 39170997b173SJ. Bruce Fields } 39180997b173SJ. Bruce Fields 391964a284d0SJ. 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) 392064a284d0SJ. Bruce Fields { 392164a284d0SJ. Bruce Fields struct nfs4_file *fi = ost->st_file; 392264a284d0SJ. Bruce Fields struct nfs4_openowner *oo = openowner(ost->st_stateowner); 392364a284d0SJ. Bruce Fields struct nfs4_client *cl = oo->oo_owner.so_client; 392464a284d0SJ. Bruce Fields struct nfs4_lockowner *lo; 392564a284d0SJ. Bruce Fields unsigned int strhashval; 392664a284d0SJ. Bruce Fields 392764a284d0SJ. Bruce Fields lo = find_lockowner_str(fi->fi_inode, &cl->cl_clientid, &lock->v.new.owner); 392864a284d0SJ. Bruce Fields if (lo) { 392964a284d0SJ. Bruce Fields if (!cstate->minorversion) 393064a284d0SJ. Bruce Fields return nfserr_bad_seqid; 393164a284d0SJ. Bruce Fields /* XXX: a lockowner always has exactly one stateid: */ 393264a284d0SJ. Bruce Fields *lst = list_first_entry(&lo->lo_owner.so_stateids, 393364a284d0SJ. Bruce Fields struct nfs4_ol_stateid, st_perstateowner); 393464a284d0SJ. Bruce Fields return nfs_ok; 393564a284d0SJ. Bruce Fields } 393616bfdaafSJ. Bruce Fields strhashval = ownerstr_hashval(cl->cl_clientid.cl_id, 393764a284d0SJ. Bruce Fields &lock->v.new.owner); 393864a284d0SJ. Bruce Fields lo = alloc_init_lock_stateowner(strhashval, cl, ost, lock); 393964a284d0SJ. Bruce Fields if (lo == NULL) 394064a284d0SJ. Bruce Fields return nfserr_jukebox; 394164a284d0SJ. Bruce Fields *lst = alloc_init_lock_stateid(lo, fi, ost); 394264a284d0SJ. Bruce Fields if (*lst == NULL) { 394364a284d0SJ. Bruce Fields release_lockowner(lo); 394464a284d0SJ. Bruce Fields return nfserr_jukebox; 394564a284d0SJ. Bruce Fields } 394664a284d0SJ. Bruce Fields *new = true; 394764a284d0SJ. Bruce Fields return nfs_ok; 394864a284d0SJ. Bruce Fields } 394964a284d0SJ. Bruce Fields 39501da177e4SLinus Torvalds /* 39511da177e4SLinus Torvalds * LOCK operation 39521da177e4SLinus Torvalds */ 3953b37ad28bSAl Viro __be32 3954ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3955a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 39561da177e4SLinus Torvalds { 3957fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 3958fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 3959dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *lock_stp; 39607d947842SJ. Bruce Fields struct nfs4_file *fp; 39617d947842SJ. Bruce Fields struct file *filp = NULL; 39621da177e4SLinus Torvalds struct file_lock file_lock; 39638dc7c311SAndy Adamson struct file_lock conflock; 3964b37ad28bSAl Viro __be32 status = 0; 396564a284d0SJ. Bruce Fields bool new_state = false; 3966b34f27aaSJ. Bruce Fields int lkflg; 3967b8dd7b9aSAl Viro int err; 39681da177e4SLinus Torvalds 39691da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 39701da177e4SLinus Torvalds (long long) lock->lk_offset, 39711da177e4SLinus Torvalds (long long) lock->lk_length); 39721da177e4SLinus Torvalds 39731da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 39741da177e4SLinus Torvalds return nfserr_inval; 39751da177e4SLinus Torvalds 3976ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 39778837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3978a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3979a6f6ef2fSAndy Adamson return status; 3980a6f6ef2fSAndy Adamson } 3981a6f6ef2fSAndy Adamson 39821da177e4SLinus Torvalds nfs4_lock_state(); 39831da177e4SLinus Torvalds 39841da177e4SLinus Torvalds if (lock->lk_is_new) { 39851da177e4SLinus Torvalds /* 39861da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3987893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3988893f8770SNeilBrown * lock stateid. 39891da177e4SLinus Torvalds */ 3990dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *open_stp = NULL; 39911da177e4SLinus Torvalds 3992684e5638SJ. Bruce Fields if (nfsd4_has_session(cstate)) 3993684e5638SJ. Bruce Fields /* See rfc 5661 18.10.3: given clientid is ignored: */ 3994684e5638SJ. Bruce Fields memcpy(&lock->v.new.clientid, 3995684e5638SJ. Bruce Fields &cstate->session->se_client->cl_clientid, 3996684e5638SJ. Bruce Fields sizeof(clientid_t)); 3997684e5638SJ. Bruce Fields 39981da177e4SLinus Torvalds status = nfserr_stale_clientid; 3999684e5638SJ. Bruce Fields if (STALE_CLIENTID(&lock->lk_new_clientid)) 40001da177e4SLinus Torvalds goto out; 40011da177e4SLinus Torvalds 40021da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 4003c0a5d93eSJ. Bruce Fields status = nfs4_preprocess_confirmed_seqid_op(cstate, 40041da177e4SLinus Torvalds lock->lk_new_open_seqid, 40051da177e4SLinus Torvalds &lock->lk_new_open_stateid, 4006c0a5d93eSJ. Bruce Fields &open_stp); 400737515177SNeilBrown if (status) 40081da177e4SLinus Torvalds goto out; 4009fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 4010b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 4011684e5638SJ. Bruce Fields if (!same_clid(&open_sop->oo_owner.so_client->cl_clientid, 4012b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 4013b34f27aaSJ. Bruce Fields goto out; 401464a284d0SJ. Bruce Fields status = lookup_or_create_lock_state(cstate, open_stp, lock, 401564a284d0SJ. Bruce Fields &lock_stp, &new_state); 401664a284d0SJ. Bruce Fields if (status) 40171da177e4SLinus Torvalds goto out; 40181da177e4SLinus Torvalds } else { 40191da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4020dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40211da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40221da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 40232288d0e3SJ. Bruce Fields NFS4_LOCK_STID, &lock_stp); 40241da177e4SLinus Torvalds if (status) 40251da177e4SLinus Torvalds goto out; 402664a284d0SJ. Bruce Fields } 4027fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 40287d947842SJ. Bruce Fields fp = lock_stp->st_file; 40291da177e4SLinus Torvalds 4030b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4031b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4032b34f27aaSJ. Bruce Fields if (status) 4033b34f27aaSJ. Bruce Fields goto out; 4034b34f27aaSJ. Bruce Fields 40350dd395dcSNeilBrown status = nfserr_grace; 4036af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40370dd395dcSNeilBrown goto out; 40380dd395dcSNeilBrown status = nfserr_no_grace; 4039af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40400dd395dcSNeilBrown goto out; 40410dd395dcSNeilBrown 40421da177e4SLinus Torvalds locks_init_lock(&file_lock); 40431da177e4SLinus Torvalds switch (lock->lk_type) { 40441da177e4SLinus Torvalds case NFS4_READ_LT: 40451da177e4SLinus Torvalds case NFS4_READW_LT: 4046f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 40470997b173SJ. Bruce Fields if (filp) 40480997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 40491da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 40501da177e4SLinus Torvalds break; 40511da177e4SLinus Torvalds case NFS4_WRITE_LT: 40521da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4053f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 40540997b173SJ. Bruce Fields if (filp) 40550997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 40561da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 40571da177e4SLinus Torvalds break; 40581da177e4SLinus Torvalds default: 40591da177e4SLinus Torvalds status = nfserr_inval; 40601da177e4SLinus Torvalds goto out; 40611da177e4SLinus Torvalds } 4062f9d7562fSJ. Bruce Fields if (!filp) { 4063f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4064f9d7562fSJ. Bruce Fields goto out; 4065f9d7562fSJ. Bruce Fields } 4066b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 40671da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40681da177e4SLinus Torvalds file_lock.fl_file = filp; 40691da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4070d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40711da177e4SLinus Torvalds 40721da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 407387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 40741da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40751da177e4SLinus Torvalds 40761da177e4SLinus Torvalds /* 40771da177e4SLinus Torvalds * Try to lock the file in the VFS. 40781da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 40791da177e4SLinus Torvalds */ 40801da177e4SLinus Torvalds 4081529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4082b8dd7b9aSAl Viro switch (-err) { 40831da177e4SLinus Torvalds case 0: /* success! */ 4084dcef0413SJ. Bruce Fields update_stateid(&lock_stp->st_stid.sc_stateid); 4085dcef0413SJ. Bruce Fields memcpy(&lock->lk_resp_stateid, &lock_stp->st_stid.sc_stateid, 40861da177e4SLinus Torvalds sizeof(stateid_t)); 4087b8dd7b9aSAl Viro status = 0; 4088eb76b3fdSAndy Adamson break; 4089eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4090eb76b3fdSAndy Adamson status = nfserr_denied; 4091eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4092eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4093eb76b3fdSAndy Adamson break; 40941da177e4SLinus Torvalds case (EDEADLK): 40951da177e4SLinus Torvalds status = nfserr_deadlock; 4096eb76b3fdSAndy Adamson break; 40971da177e4SLinus Torvalds default: 4098fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 40993e772463SJ. Bruce Fields status = nfserrno(err); 4100eb76b3fdSAndy Adamson break; 41011da177e4SLinus Torvalds } 41021da177e4SLinus Torvalds out: 410364a284d0SJ. Bruce Fields if (status && new_state) 4104f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 41055ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 41061da177e4SLinus Torvalds nfs4_unlock_state(); 41071da177e4SLinus Torvalds return status; 41081da177e4SLinus Torvalds } 41091da177e4SLinus Torvalds 41101da177e4SLinus Torvalds /* 411155ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 411255ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 411355ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 411455ef1274SJ. Bruce Fields * inode operation.) 411555ef1274SJ. Bruce Fields */ 411655ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 411755ef1274SJ. Bruce Fields { 411855ef1274SJ. Bruce Fields struct file *file; 411955ef1274SJ. Bruce Fields int err; 412055ef1274SJ. Bruce Fields 412155ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 412255ef1274SJ. Bruce Fields if (err) 412355ef1274SJ. Bruce Fields return err; 412455ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 412555ef1274SJ. Bruce Fields nfsd_close(file); 412655ef1274SJ. Bruce Fields return err; 412755ef1274SJ. Bruce Fields } 412855ef1274SJ. Bruce Fields 412955ef1274SJ. Bruce Fields /* 41301da177e4SLinus Torvalds * LOCKT operation 41311da177e4SLinus Torvalds */ 4132b37ad28bSAl Viro __be32 4133ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4134ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41351da177e4SLinus Torvalds { 41361da177e4SLinus Torvalds struct inode *inode; 41371da177e4SLinus Torvalds struct file_lock file_lock; 4138fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4139fd85b817SMarc Eshel int error; 4140b37ad28bSAl Viro __be32 status; 41411da177e4SLinus Torvalds 4142af558e33SJ. Bruce Fields if (locks_in_grace()) 41431da177e4SLinus Torvalds return nfserr_grace; 41441da177e4SLinus Torvalds 41451da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 41461da177e4SLinus Torvalds return nfserr_inval; 41471da177e4SLinus Torvalds 41481da177e4SLinus Torvalds nfs4_lock_state(); 41491da177e4SLinus Torvalds 41501da177e4SLinus Torvalds status = nfserr_stale_clientid; 415160adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 41521da177e4SLinus Torvalds goto out; 41531da177e4SLinus Torvalds 415475c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 41551da177e4SLinus Torvalds goto out; 41561da177e4SLinus Torvalds 4157ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 41581da177e4SLinus Torvalds locks_init_lock(&file_lock); 41591da177e4SLinus Torvalds switch (lockt->lt_type) { 41601da177e4SLinus Torvalds case NFS4_READ_LT: 41611da177e4SLinus Torvalds case NFS4_READW_LT: 41621da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41631da177e4SLinus Torvalds break; 41641da177e4SLinus Torvalds case NFS4_WRITE_LT: 41651da177e4SLinus Torvalds case NFS4_WRITEW_LT: 41661da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41671da177e4SLinus Torvalds break; 41681da177e4SLinus Torvalds default: 41692fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 41701da177e4SLinus Torvalds status = nfserr_inval; 41711da177e4SLinus Torvalds goto out; 41721da177e4SLinus Torvalds } 41731da177e4SLinus Torvalds 4174fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4175fe0750e5SJ. Bruce Fields if (lo) 4176fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 41771da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41781da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 41791da177e4SLinus Torvalds 41801da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 418187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 41821da177e4SLinus Torvalds 41831da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41841da177e4SLinus Torvalds 41851da177e4SLinus Torvalds status = nfs_ok; 418655ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4187fd85b817SMarc Eshel if (error) { 4188fd85b817SMarc Eshel status = nfserrno(error); 4189fd85b817SMarc Eshel goto out; 4190fd85b817SMarc Eshel } 41919d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 41921da177e4SLinus Torvalds status = nfserr_denied; 41939d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 41941da177e4SLinus Torvalds } 41951da177e4SLinus Torvalds out: 41961da177e4SLinus Torvalds nfs4_unlock_state(); 41971da177e4SLinus Torvalds return status; 41981da177e4SLinus Torvalds } 41991da177e4SLinus Torvalds 4200b37ad28bSAl Viro __be32 4201ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4202a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 42031da177e4SLinus Torvalds { 4204dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42051da177e4SLinus Torvalds struct file *filp = NULL; 42061da177e4SLinus Torvalds struct file_lock file_lock; 4207b37ad28bSAl Viro __be32 status; 4208b8dd7b9aSAl Viro int err; 42091da177e4SLinus Torvalds 42101da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 42111da177e4SLinus Torvalds (long long) locku->lu_offset, 42121da177e4SLinus Torvalds (long long) locku->lu_length); 42131da177e4SLinus Torvalds 42141da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42151da177e4SLinus Torvalds return nfserr_inval; 42161da177e4SLinus Torvalds 42171da177e4SLinus Torvalds nfs4_lock_state(); 42181da177e4SLinus Torvalds 42199072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 42202288d0e3SJ. Bruce Fields &locku->lu_stateid, NFS4_LOCK_STID, &stp); 42219072d5c6SJ. Bruce Fields if (status) 42221da177e4SLinus Torvalds goto out; 4223f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4224f9d7562fSJ. Bruce Fields if (!filp) { 4225f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4226f9d7562fSJ. Bruce Fields goto out; 4227f9d7562fSJ. Bruce Fields } 42281da177e4SLinus Torvalds BUG_ON(!filp); 42291da177e4SLinus Torvalds locks_init_lock(&file_lock); 42301da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4231fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 42321da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42331da177e4SLinus Torvalds file_lock.fl_file = filp; 42341da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4235d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42361da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42371da177e4SLinus Torvalds 423887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42391da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42401da177e4SLinus Torvalds 42411da177e4SLinus Torvalds /* 42421da177e4SLinus Torvalds * Try to unlock the file in the VFS. 42431da177e4SLinus Torvalds */ 4244fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4245b8dd7b9aSAl Viro if (err) { 4246fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 42471da177e4SLinus Torvalds goto out_nfserr; 42481da177e4SLinus Torvalds } 42491da177e4SLinus Torvalds /* 42501da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 42511da177e4SLinus Torvalds */ 4252dcef0413SJ. Bruce Fields update_stateid(&stp->st_stid.sc_stateid); 4253dcef0413SJ. Bruce Fields memcpy(&locku->lu_stateid, &stp->st_stid.sc_stateid, sizeof(stateid_t)); 42541da177e4SLinus Torvalds 42551da177e4SLinus Torvalds out: 425671c3bcd7SJ. Bruce Fields if (!cstate->replay_owner) 42571da177e4SLinus Torvalds nfs4_unlock_state(); 42581da177e4SLinus Torvalds return status; 42591da177e4SLinus Torvalds 42601da177e4SLinus Torvalds out_nfserr: 4261b8dd7b9aSAl Viro status = nfserrno(err); 42621da177e4SLinus Torvalds goto out; 42631da177e4SLinus Torvalds } 42641da177e4SLinus Torvalds 42651da177e4SLinus Torvalds /* 42661da177e4SLinus Torvalds * returns 42671da177e4SLinus Torvalds * 1: locks held by lockowner 42681da177e4SLinus Torvalds * 0: no locks held by lockowner 42691da177e4SLinus Torvalds */ 42701da177e4SLinus Torvalds static int 4271fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 42721da177e4SLinus Torvalds { 42731da177e4SLinus Torvalds struct file_lock **flpp; 4274f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 42751da177e4SLinus Torvalds int status = 0; 42761da177e4SLinus Torvalds 4277b89f4321SArnd Bergmann lock_flocks(); 42781da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4279796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 42801da177e4SLinus Torvalds status = 1; 42811da177e4SLinus Torvalds goto out; 42821da177e4SLinus Torvalds } 4283796dadfdSJ. Bruce Fields } 42841da177e4SLinus Torvalds out: 4285b89f4321SArnd Bergmann unlock_flocks(); 42861da177e4SLinus Torvalds return status; 42871da177e4SLinus Torvalds } 42881da177e4SLinus Torvalds 4289b37ad28bSAl Viro __be32 4290b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4291b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4292b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 42931da177e4SLinus Torvalds { 42941da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 42953e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4296fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4297dcef0413SJ. Bruce Fields struct nfs4_ol_stateid *stp; 42981da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 42993e9e3dbeSNeilBrown struct list_head matches; 430016bfdaafSJ. Bruce Fields unsigned int hashval = ownerstr_hashval(clid->cl_id, owner); 4301b37ad28bSAl Viro __be32 status; 43021da177e4SLinus Torvalds 43031da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 43041da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 43051da177e4SLinus Torvalds 43061da177e4SLinus Torvalds /* XXX check for lease expiration */ 43071da177e4SLinus Torvalds 43081da177e4SLinus Torvalds status = nfserr_stale_clientid; 4309849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43101da177e4SLinus Torvalds return status; 43111da177e4SLinus Torvalds 43121da177e4SLinus Torvalds nfs4_lock_state(); 43131da177e4SLinus Torvalds 43141da177e4SLinus Torvalds status = nfserr_locks_held; 43153e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 431606f1f864SJ. Bruce Fields 431716bfdaafSJ. Bruce Fields list_for_each_entry(sop, &ownerstr_hashtbl[hashval], so_strhash) { 431816bfdaafSJ. Bruce Fields if (sop->so_is_open_owner) 431916bfdaafSJ. Bruce Fields continue; 4320599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43213e9e3dbeSNeilBrown continue; 43223e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4323ea1da636SNeilBrown st_perstateowner) { 4324fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4325fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 43261da177e4SLinus Torvalds goto out; 4327fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 43281da177e4SLinus Torvalds } 43293e9e3dbeSNeilBrown } 43303e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43313e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43323e9e3dbeSNeilBrown * have been checked. */ 43331da177e4SLinus Torvalds status = nfs_ok; 43340fa822e4SNeilBrown while (!list_empty(&matches)) { 4335fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4336fe0750e5SJ. Bruce Fields lo_list); 43370fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43380fa822e4SNeilBrown * for openowners. */ 4339fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4340fe0750e5SJ. Bruce Fields release_lockowner(lo); 43411da177e4SLinus Torvalds } 43421da177e4SLinus Torvalds out: 43431da177e4SLinus Torvalds nfs4_unlock_state(); 43441da177e4SLinus Torvalds return status; 43451da177e4SLinus Torvalds } 43461da177e4SLinus Torvalds 43471da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4348a55370a3SNeilBrown alloc_reclaim(void) 43491da177e4SLinus Torvalds { 4350a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 43511da177e4SLinus Torvalds } 43521da177e4SLinus Torvalds 4353c7b9a459SNeilBrown int 4354a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4355c7b9a459SNeilBrown { 4356c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4357c7b9a459SNeilBrown struct nfs4_client *clp; 4358c7b9a459SNeilBrown 4359e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4360c7b9a459SNeilBrown return clp ? 1 : 0; 4361c7b9a459SNeilBrown } 4362c7b9a459SNeilBrown 43631da177e4SLinus Torvalds /* 43641da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 43651da177e4SLinus Torvalds */ 4366190e4fbfSNeilBrown int 4367190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 43681da177e4SLinus Torvalds { 43691da177e4SLinus Torvalds unsigned int strhashval; 43701da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43711da177e4SLinus Torvalds 4372a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4373a55370a3SNeilBrown crp = alloc_reclaim(); 43741da177e4SLinus Torvalds if (!crp) 43751da177e4SLinus Torvalds return 0; 4376a55370a3SNeilBrown strhashval = clientstr_hashval(name); 43771da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 43781da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4379a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 43801da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 43811da177e4SLinus Torvalds return 1; 43821da177e4SLinus Torvalds } 43831da177e4SLinus Torvalds 43841da177e4SLinus Torvalds static void 43851da177e4SLinus Torvalds nfs4_release_reclaim(void) 43861da177e4SLinus Torvalds { 43871da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43881da177e4SLinus Torvalds int i; 43891da177e4SLinus Torvalds 43901da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43911da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 43921da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 43931da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 43941da177e4SLinus Torvalds list_del(&crp->cr_strhash); 43951da177e4SLinus Torvalds kfree(crp); 43961da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 43971da177e4SLinus Torvalds } 43981da177e4SLinus Torvalds } 43991da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 44001da177e4SLinus Torvalds } 44011da177e4SLinus Torvalds 44021da177e4SLinus Torvalds /* 44031da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4404fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 44051da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 44061da177e4SLinus Torvalds { 44071da177e4SLinus Torvalds unsigned int strhashval; 44081da177e4SLinus Torvalds struct nfs4_client *clp; 44091da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44101da177e4SLinus Torvalds 44111da177e4SLinus Torvalds 44121da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 44131da177e4SLinus Torvalds clp = find_confirmed_client(clid); 44141da177e4SLinus Torvalds if (clp == NULL) 44151da177e4SLinus Torvalds return NULL; 44161da177e4SLinus Torvalds 4417a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4418a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4419a55370a3SNeilBrown clp->cl_recdir); 44201da177e4SLinus Torvalds 44211da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4422a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44231da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4424a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44251da177e4SLinus Torvalds return crp; 44261da177e4SLinus Torvalds } 44271da177e4SLinus Torvalds } 44281da177e4SLinus Torvalds return NULL; 44291da177e4SLinus Torvalds } 44301da177e4SLinus Torvalds 44311da177e4SLinus Torvalds /* 44321da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44331da177e4SLinus Torvalds */ 4434b37ad28bSAl Viro __be32 44351da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44361da177e4SLinus Torvalds { 4437dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44381da177e4SLinus Torvalds } 44391da177e4SLinus Torvalds 444065178db4SBryan Schumaker #ifdef CONFIG_NFSD_FAULT_INJECTION 444165178db4SBryan Schumaker 444265178db4SBryan Schumaker void nfsd_forget_clients(u64 num) 444365178db4SBryan Schumaker { 444465178db4SBryan Schumaker struct nfs4_client *clp, *next; 444565178db4SBryan Schumaker int count = 0; 444665178db4SBryan Schumaker 444765178db4SBryan Schumaker nfs4_lock_state(); 444865178db4SBryan Schumaker list_for_each_entry_safe(clp, next, &client_lru, cl_lru) { 444965178db4SBryan Schumaker nfsd4_remove_clid_dir(clp); 445065178db4SBryan Schumaker expire_client(clp); 445165178db4SBryan Schumaker if (++count == num) 445265178db4SBryan Schumaker break; 445365178db4SBryan Schumaker } 445465178db4SBryan Schumaker nfs4_unlock_state(); 445565178db4SBryan Schumaker 445665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d clients", count); 445765178db4SBryan Schumaker } 445865178db4SBryan Schumaker 445965178db4SBryan Schumaker static void release_lockowner_sop(struct nfs4_stateowner *sop) 446065178db4SBryan Schumaker { 446165178db4SBryan Schumaker release_lockowner(lockowner(sop)); 446265178db4SBryan Schumaker } 446365178db4SBryan Schumaker 446465178db4SBryan Schumaker static void release_openowner_sop(struct nfs4_stateowner *sop) 446565178db4SBryan Schumaker { 446665178db4SBryan Schumaker release_openowner(openowner(sop)); 446765178db4SBryan Schumaker } 446865178db4SBryan Schumaker 4469353de31bSJ. Bruce Fields static int nfsd_release_n_owners(u64 num, bool is_open_owner, 447065178db4SBryan Schumaker void (*release_sop)(struct nfs4_stateowner *)) 447165178db4SBryan Schumaker { 447265178db4SBryan Schumaker int i, count = 0; 447365178db4SBryan Schumaker struct nfs4_stateowner *sop, *next; 447465178db4SBryan Schumaker 447516bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 447616bfdaafSJ. Bruce Fields list_for_each_entry_safe(sop, next, &ownerstr_hashtbl[i], so_strhash) { 447716bfdaafSJ. Bruce Fields if (sop->so_is_open_owner != is_open_owner) 447816bfdaafSJ. Bruce Fields continue; 447965178db4SBryan Schumaker release_sop(sop); 448065178db4SBryan Schumaker if (++count == num) 448165178db4SBryan Schumaker return count; 448265178db4SBryan Schumaker } 448365178db4SBryan Schumaker } 448465178db4SBryan Schumaker return count; 448565178db4SBryan Schumaker } 448665178db4SBryan Schumaker 448765178db4SBryan Schumaker void nfsd_forget_locks(u64 num) 448865178db4SBryan Schumaker { 448965178db4SBryan Schumaker int count; 449065178db4SBryan Schumaker 449165178db4SBryan Schumaker nfs4_lock_state(); 449216bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, false, release_lockowner_sop); 449365178db4SBryan Schumaker nfs4_unlock_state(); 449465178db4SBryan Schumaker 449565178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d locks", count); 449665178db4SBryan Schumaker } 449765178db4SBryan Schumaker 449865178db4SBryan Schumaker void nfsd_forget_openowners(u64 num) 449965178db4SBryan Schumaker { 450065178db4SBryan Schumaker int count; 450165178db4SBryan Schumaker 450265178db4SBryan Schumaker nfs4_lock_state(); 450316bfdaafSJ. Bruce Fields count = nfsd_release_n_owners(num, true, release_openowner_sop); 450465178db4SBryan Schumaker nfs4_unlock_state(); 450565178db4SBryan Schumaker 450665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d open owners", count); 450765178db4SBryan Schumaker } 450865178db4SBryan Schumaker 450965178db4SBryan Schumaker int nfsd_process_n_delegations(u64 num, void (*deleg_func)(struct nfs4_delegation *)) 451065178db4SBryan Schumaker { 451165178db4SBryan Schumaker int i, count = 0; 45122d3475c0SBryan Schumaker struct nfs4_file *fp, *fnext; 45132d3475c0SBryan Schumaker struct nfs4_delegation *dp, *dnext; 451465178db4SBryan Schumaker 451565178db4SBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 45162d3475c0SBryan Schumaker list_for_each_entry_safe(fp, fnext, &file_hashtbl[i], fi_hash) { 45172d3475c0SBryan Schumaker list_for_each_entry_safe(dp, dnext, &fp->fi_delegations, dl_perfile) { 451865178db4SBryan Schumaker deleg_func(dp); 451965178db4SBryan Schumaker if (++count == num) 452065178db4SBryan Schumaker return count; 452165178db4SBryan Schumaker } 452265178db4SBryan Schumaker } 452365178db4SBryan Schumaker } 45242d3475c0SBryan Schumaker 452565178db4SBryan Schumaker return count; 452665178db4SBryan Schumaker } 452765178db4SBryan Schumaker 452865178db4SBryan Schumaker void nfsd_forget_delegations(u64 num) 452965178db4SBryan Schumaker { 453065178db4SBryan Schumaker unsigned int count; 453165178db4SBryan Schumaker 453265178db4SBryan Schumaker nfs4_lock_state(); 453365178db4SBryan Schumaker count = nfsd_process_n_delegations(num, unhash_delegation); 453465178db4SBryan Schumaker nfs4_unlock_state(); 453565178db4SBryan Schumaker 453665178db4SBryan Schumaker printk(KERN_INFO "NFSD: Forgot %d delegations", count); 453765178db4SBryan Schumaker } 453865178db4SBryan Schumaker 453965178db4SBryan Schumaker void nfsd_recall_delegations(u64 num) 454065178db4SBryan Schumaker { 454165178db4SBryan Schumaker unsigned int count; 454265178db4SBryan Schumaker 454365178db4SBryan Schumaker nfs4_lock_state(); 454465178db4SBryan Schumaker spin_lock(&recall_lock); 454565178db4SBryan Schumaker count = nfsd_process_n_delegations(num, nfsd_break_one_deleg); 454665178db4SBryan Schumaker spin_unlock(&recall_lock); 454765178db4SBryan Schumaker nfs4_unlock_state(); 454865178db4SBryan Schumaker 454965178db4SBryan Schumaker printk(KERN_INFO "NFSD: Recalled %d delegations", count); 455065178db4SBryan Schumaker } 455165178db4SBryan Schumaker 455265178db4SBryan Schumaker #endif /* CONFIG_NFSD_FAULT_INJECTION */ 455365178db4SBryan Schumaker 4554ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 45551da177e4SLinus Torvalds 455672083396SBryan Schumaker void 4557ac4d8ff2SNeilBrown nfs4_state_init(void) 45581da177e4SLinus Torvalds { 455972083396SBryan Schumaker int i; 45601da177e4SLinus Torvalds 45611da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45621da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 45631da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 45641da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 45651da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 456602cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 45671da177e4SLinus Torvalds } 45685282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 45695282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 45701da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 45711da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 45721da177e4SLinus Torvalds } 457316bfdaafSJ. Bruce Fields for (i = 0; i < OWNER_HASH_SIZE; i++) { 457416bfdaafSJ. Bruce Fields INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 45751da177e4SLinus Torvalds } 4576009673b4SJ. Bruce Fields for (i = 0; i < LOCKOWNER_INO_HASH_SIZE; i++) 4577009673b4SJ. Bruce Fields INIT_LIST_HEAD(&lockowner_ino_hashtbl[i]); 45781da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 45791da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 45801da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4581ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4582ac4d8ff2SNeilBrown } 4583ac4d8ff2SNeilBrown 4584190e4fbfSNeilBrown static void 4585190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4586190e4fbfSNeilBrown { 4587190e4fbfSNeilBrown int status; 4588190e4fbfSNeilBrown 45890964a3d3SNeilBrown nfs4_lock_state(); 459048483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4591190e4fbfSNeilBrown status = nfsd4_recdir_load(); 45920964a3d3SNeilBrown nfs4_unlock_state(); 4593190e4fbfSNeilBrown if (status) 4594190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4595190e4fbfSNeilBrown } 4596190e4fbfSNeilBrown 4597c2f1a551SMeelap Shah /* 4598c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4599c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4600c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4601c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4602c2f1a551SMeelap Shah * 4603c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4604c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4605c2f1a551SMeelap Shah */ 4606c2f1a551SMeelap Shah static void 4607c2f1a551SMeelap Shah set_max_delegations(void) 4608c2f1a551SMeelap Shah { 4609c2f1a551SMeelap Shah /* 4610c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4611c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4612c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4613c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4614c2f1a551SMeelap Shah */ 4615c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4616c2f1a551SMeelap Shah } 4617c2f1a551SMeelap Shah 4618ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4619ac4d8ff2SNeilBrown 462029ab23ccSJ. Bruce Fields static int 4621ac4d8ff2SNeilBrown __nfs4_state_start(void) 4622ac4d8ff2SNeilBrown { 4623b5a1a81eSJ. Bruce Fields int ret; 4624b5a1a81eSJ. Bruce Fields 46251da177e4SLinus Torvalds boot_time = get_seconds(); 4626af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 46279a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4628e46b498cSJ. Bruce Fields nfsd4_grace); 4629b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4630b5a1a81eSJ. Bruce Fields if (ret) 4631b5a1a81eSJ. Bruce Fields return -ENOMEM; 463258da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 463329ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 463429ab23ccSJ. Bruce Fields return -ENOMEM; 4635b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4636b5a1a81eSJ. Bruce Fields if (ret) 4637b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4638e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4639c2f1a551SMeelap Shah set_max_delegations(); 4640b5a1a81eSJ. Bruce Fields return 0; 4641b5a1a81eSJ. Bruce Fields out_free_laundry: 4642b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4643b5a1a81eSJ. Bruce Fields return ret; 46441da177e4SLinus Torvalds } 46451da177e4SLinus Torvalds 464629ab23ccSJ. Bruce Fields int 464776a3550eSNeilBrown nfs4_state_start(void) 46481da177e4SLinus Torvalds { 4649190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 46504ad9a344SJeff Layton return __nfs4_state_start(); 46511da177e4SLinus Torvalds } 46521da177e4SLinus Torvalds 46531da177e4SLinus Torvalds static void 46541da177e4SLinus Torvalds __nfs4_state_shutdown(void) 46551da177e4SLinus Torvalds { 46561da177e4SLinus Torvalds int i; 46571da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 46581da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 46591da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 46601da177e4SLinus Torvalds 46611da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 46621da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 46631da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 46641da177e4SLinus Torvalds expire_client(clp); 46651da177e4SLinus Torvalds } 46661da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 46671da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 46681da177e4SLinus Torvalds expire_client(clp); 46691da177e4SLinus Torvalds } 46701da177e4SLinus Torvalds } 46711da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 46721da177e4SLinus Torvalds spin_lock(&recall_lock); 46731da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 46741da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46751da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 46761da177e4SLinus Torvalds } 46771da177e4SLinus Torvalds spin_unlock(&recall_lock); 46781da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 46791da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 46801da177e4SLinus Torvalds unhash_delegation(dp); 46811da177e4SLinus Torvalds } 46821da177e4SLinus Torvalds 4683190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 46841da177e4SLinus Torvalds } 46851da177e4SLinus Torvalds 46861da177e4SLinus Torvalds void 46871da177e4SLinus Torvalds nfs4_state_shutdown(void) 46881da177e4SLinus Torvalds { 4689afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 46905e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 46912c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 46921da177e4SLinus Torvalds nfs4_lock_state(); 46931da177e4SLinus Torvalds nfs4_release_reclaim(); 46941da177e4SLinus Torvalds __nfs4_state_shutdown(); 46951da177e4SLinus Torvalds nfs4_unlock_state(); 4696c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 46971da177e4SLinus Torvalds } 46988b70484cSTigran Mkrtchyan 46998b70484cSTigran Mkrtchyan static void 47008b70484cSTigran Mkrtchyan get_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47018b70484cSTigran Mkrtchyan { 47028b70484cSTigran Mkrtchyan if (cstate->current_stateid && CURRENT_STATEID(stateid)) 47038b70484cSTigran Mkrtchyan memcpy(stateid, cstate->current_stateid, sizeof(stateid_t)); 47048b70484cSTigran Mkrtchyan } 47058b70484cSTigran Mkrtchyan 47068b70484cSTigran Mkrtchyan static void 47078b70484cSTigran Mkrtchyan put_stateid(struct nfsd4_compound_state *cstate, stateid_t *stateid) 47088b70484cSTigran Mkrtchyan { 47098b70484cSTigran Mkrtchyan if (cstate->minorversion) 47108b70484cSTigran Mkrtchyan cstate->current_stateid = stateid; 47118b70484cSTigran Mkrtchyan } 47128b70484cSTigran Mkrtchyan 471362cd4a59STigran Mkrtchyan /* 471462cd4a59STigran Mkrtchyan * functions to set current state id 471562cd4a59STigran Mkrtchyan */ 47168b70484cSTigran Mkrtchyan void 47179428fe1aSTigran Mkrtchyan nfsd4_set_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 47189428fe1aSTigran Mkrtchyan { 47199428fe1aSTigran Mkrtchyan put_stateid(cstate, &odp->od_stateid); 47209428fe1aSTigran Mkrtchyan } 47219428fe1aSTigran Mkrtchyan 47229428fe1aSTigran Mkrtchyan void 47238b70484cSTigran Mkrtchyan nfsd4_set_openstateid(struct nfsd4_compound_state *cstate, struct nfsd4_open *open) 47248b70484cSTigran Mkrtchyan { 47258b70484cSTigran Mkrtchyan put_stateid(cstate, &open->op_stateid); 47268b70484cSTigran Mkrtchyan } 47278b70484cSTigran Mkrtchyan 47288b70484cSTigran Mkrtchyan void 472962cd4a59STigran Mkrtchyan nfsd4_set_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 473062cd4a59STigran Mkrtchyan { 473162cd4a59STigran Mkrtchyan put_stateid(cstate, &close->cl_stateid); 473262cd4a59STigran Mkrtchyan } 473362cd4a59STigran Mkrtchyan 473462cd4a59STigran Mkrtchyan void 473562cd4a59STigran Mkrtchyan nfsd4_set_lockstateid(struct nfsd4_compound_state *cstate, struct nfsd4_lock *lock) 473662cd4a59STigran Mkrtchyan { 473762cd4a59STigran Mkrtchyan put_stateid(cstate, &lock->lk_resp_stateid); 473862cd4a59STigran Mkrtchyan } 473962cd4a59STigran Mkrtchyan 474062cd4a59STigran Mkrtchyan /* 474162cd4a59STigran Mkrtchyan * functions to consume current state id 474262cd4a59STigran Mkrtchyan */ 47431e97b519STigran Mkrtchyan 47441e97b519STigran Mkrtchyan void 47459428fe1aSTigran Mkrtchyan nfsd4_get_opendowngradestateid(struct nfsd4_compound_state *cstate, struct nfsd4_open_downgrade *odp) 47469428fe1aSTigran Mkrtchyan { 47479428fe1aSTigran Mkrtchyan get_stateid(cstate, &odp->od_stateid); 47489428fe1aSTigran Mkrtchyan } 47499428fe1aSTigran Mkrtchyan 47509428fe1aSTigran Mkrtchyan void 47519428fe1aSTigran Mkrtchyan nfsd4_get_delegreturnstateid(struct nfsd4_compound_state *cstate, struct nfsd4_delegreturn *drp) 47529428fe1aSTigran Mkrtchyan { 47539428fe1aSTigran Mkrtchyan get_stateid(cstate, &drp->dr_stateid); 47549428fe1aSTigran Mkrtchyan } 47559428fe1aSTigran Mkrtchyan 47569428fe1aSTigran Mkrtchyan void 47571e97b519STigran Mkrtchyan nfsd4_get_freestateid(struct nfsd4_compound_state *cstate, struct nfsd4_free_stateid *fsp) 47581e97b519STigran Mkrtchyan { 47591e97b519STigran Mkrtchyan get_stateid(cstate, &fsp->fr_stateid); 47601e97b519STigran Mkrtchyan } 47611e97b519STigran Mkrtchyan 47621e97b519STigran Mkrtchyan void 47631e97b519STigran Mkrtchyan nfsd4_get_setattrstateid(struct nfsd4_compound_state *cstate, struct nfsd4_setattr *setattr) 47641e97b519STigran Mkrtchyan { 47651e97b519STigran Mkrtchyan get_stateid(cstate, &setattr->sa_stateid); 47661e97b519STigran Mkrtchyan } 47671e97b519STigran Mkrtchyan 476862cd4a59STigran Mkrtchyan void 47698b70484cSTigran Mkrtchyan nfsd4_get_closestateid(struct nfsd4_compound_state *cstate, struct nfsd4_close *close) 47708b70484cSTigran Mkrtchyan { 47718b70484cSTigran Mkrtchyan get_stateid(cstate, &close->cl_stateid); 47728b70484cSTigran Mkrtchyan } 47738b70484cSTigran Mkrtchyan 47748b70484cSTigran Mkrtchyan void 477562cd4a59STigran Mkrtchyan nfsd4_get_lockustateid(struct nfsd4_compound_state *cstate, struct nfsd4_locku *locku) 47768b70484cSTigran Mkrtchyan { 477762cd4a59STigran Mkrtchyan get_stateid(cstate, &locku->lu_stateid); 47788b70484cSTigran Mkrtchyan } 477930813e27STigran Mkrtchyan 478030813e27STigran Mkrtchyan void 478130813e27STigran Mkrtchyan nfsd4_get_readstateid(struct nfsd4_compound_state *cstate, struct nfsd4_read *read) 478230813e27STigran Mkrtchyan { 478330813e27STigran Mkrtchyan get_stateid(cstate, &read->rd_stateid); 478430813e27STigran Mkrtchyan } 478530813e27STigran Mkrtchyan 478630813e27STigran Mkrtchyan void 478730813e27STigran Mkrtchyan nfsd4_get_writestateid(struct nfsd4_compound_state *cstate, struct nfsd4_write *write) 478830813e27STigran Mkrtchyan { 478930813e27STigran Mkrtchyan get_stateid(cstate, &write->wr_stateid); 479030813e27STigran Mkrtchyan } 4791