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; 521da177e4SLinus Torvalds static u32 current_ownerid = 1; 531da177e4SLinus Torvalds static u32 current_fileid = 1; 541da177e4SLinus Torvalds static u32 current_delegid = 1; 55fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 56fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 57ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 58fd39ca9aSNeilBrown 59fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 60fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 611da177e4SLinus Torvalds 621da177e4SLinus Torvalds /* forward declarations */ 63fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 64e1ca12dfSBryan Schumaker static struct nfs4_delegation * search_for_delegation(stateid_t *stid); 651da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 66e1ca12dfSBryan Schumaker static int check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner); 671da177e4SLinus Torvalds 688b671b80SJ. Bruce Fields /* Locking: */ 698b671b80SJ. Bruce Fields 708b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 71353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 721da177e4SLinus Torvalds 738b671b80SJ. Bruce Fields /* 748b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 758b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 768b671b80SJ. Bruce Fields * eventually cover more: 778b671b80SJ. Bruce Fields */ 788b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 798b671b80SJ. Bruce Fields 80e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 81e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 83e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 84e60d4398SNeilBrown 851da177e4SLinus Torvalds void 861da177e4SLinus Torvalds nfs4_lock_state(void) 871da177e4SLinus Torvalds { 88353ab6e9SIngo Molnar mutex_lock(&client_mutex); 891da177e4SLinus Torvalds } 901da177e4SLinus Torvalds 911da177e4SLinus Torvalds void 921da177e4SLinus Torvalds nfs4_unlock_state(void) 931da177e4SLinus Torvalds { 94353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds static inline u32 981da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 991da177e4SLinus Torvalds { 1001da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1011da177e4SLinus Torvalds 1021da177e4SLinus Torvalds u32 x = 0; 1031da177e4SLinus Torvalds while (nbytes--) { 1041da177e4SLinus Torvalds x *= 37; 1051da177e4SLinus Torvalds x += *cptr++; 1061da177e4SLinus Torvalds } 1071da177e4SLinus Torvalds return x; 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static struct list_head del_recall_lru; 1111da177e4SLinus Torvalds 11213cd2184SNeilBrown static inline void 11313cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11413cd2184SNeilBrown { 1158b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1168b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1178b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1188b671b80SJ. Bruce Fields iput(fi->fi_inode); 1198b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1208b671b80SJ. Bruce Fields } 12113cd2184SNeilBrown } 12213cd2184SNeilBrown 12313cd2184SNeilBrown static inline void 12413cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12513cd2184SNeilBrown { 1268b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12713cd2184SNeilBrown } 12813cd2184SNeilBrown 129ef0f3390SNeilBrown static int num_delegations; 130c2f1a551SMeelap Shah unsigned int max_delegations; 131ef0f3390SNeilBrown 132ef0f3390SNeilBrown /* 133ef0f3390SNeilBrown * Open owner state (share locks) 134ef0f3390SNeilBrown */ 135ef0f3390SNeilBrown 136506f275fSJ. Bruce Fields /* hash tables for open owners */ 137506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_BITS 8 138506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) 139506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) 140ef0f3390SNeilBrown 141506f275fSJ. Bruce Fields static unsigned int open_ownerid_hashval(const u32 id) 142ddc04c41SJ. Bruce Fields { 143506f275fSJ. Bruce Fields return id & OPEN_OWNER_HASH_MASK; 144ddc04c41SJ. Bruce Fields } 145ddc04c41SJ. Bruce Fields 146506f275fSJ. Bruce Fields static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 147ddc04c41SJ. Bruce Fields { 148ddc04c41SJ. Bruce Fields unsigned int ret; 149ddc04c41SJ. Bruce Fields 150ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 151ddc04c41SJ. Bruce Fields ret += clientid; 152506f275fSJ. Bruce Fields return ret & OPEN_OWNER_HASH_MASK; 153ddc04c41SJ. Bruce Fields } 154ef0f3390SNeilBrown 155506f275fSJ. Bruce Fields static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; 156506f275fSJ. Bruce Fields static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; 157ef0f3390SNeilBrown 158ef0f3390SNeilBrown /* hash table for nfs4_file */ 159ef0f3390SNeilBrown #define FILE_HASH_BITS 8 160ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 16135079582SShan Wei 162ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 163ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 164ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 165ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 166ef0f3390SNeilBrown 167ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 168ddc04c41SJ. Bruce Fields { 169ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 170ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 171ddc04c41SJ. Bruce Fields } 172ddc04c41SJ. Bruce Fields 173ddc04c41SJ. Bruce Fields static unsigned int stateid_hashval(u32 owner_id, u32 file_id) 174ddc04c41SJ. Bruce Fields { 175ddc04c41SJ. Bruce Fields return (owner_id + file_id) & STATEID_HASH_MASK; 176ddc04c41SJ. Bruce Fields } 177ef0f3390SNeilBrown 178ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 179ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 180ef0f3390SNeilBrown 181998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 182f9d7562fSJ. Bruce Fields { 183f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 184f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 185f9d7562fSJ. Bruce Fields } 186f9d7562fSJ. Bruce Fields 187998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 188998db52cSJ. Bruce Fields { 189998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 190998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 191998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 192998db52cSJ. Bruce Fields } else 193998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 194998db52cSJ. Bruce Fields } 195998db52cSJ. Bruce Fields 196998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 197f9d7562fSJ. Bruce Fields { 198f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 199f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 200f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 201f9d7562fSJ. Bruce Fields } 202f9d7562fSJ. Bruce Fields } 203f9d7562fSJ. Bruce Fields 204998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 205f9d7562fSJ. Bruce Fields { 206f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 207f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 208f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 209f9d7562fSJ. Bruce Fields } 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields 212998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 213998db52cSJ. Bruce Fields { 214998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 215998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 216998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 217998db52cSJ. Bruce Fields } else 218998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 219998db52cSJ. Bruce Fields } 220998db52cSJ. Bruce Fields 2211da177e4SLinus Torvalds static struct nfs4_delegation * 2221da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds struct nfs4_delegation *dp; 2251da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 228c3e48080SJ. Bruce Fields /* 229c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 230c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 231c3e48080SJ. Bruce Fields * write delegations properly. 232c3e48080SJ. Bruce Fields */ 233c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 234c3e48080SJ. Bruce Fields return NULL; 23547f9940cSMeelap Shah if (fp->fi_had_conflict) 23647f9940cSMeelap Shah return NULL; 237c2f1a551SMeelap Shah if (num_delegations > max_delegations) 238ef0f3390SNeilBrown return NULL; 2395b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2405b2d21c1SNeilBrown if (dp == NULL) 2411da177e4SLinus Torvalds return dp; 242ef0f3390SNeilBrown num_delegations++; 243ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 244ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2451da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2461da177e4SLinus Torvalds dp->dl_client = clp; 24713cd2184SNeilBrown get_nfs4_file(fp); 2481da177e4SLinus Torvalds dp->dl_file = fp; 2491da177e4SLinus Torvalds dp->dl_type = type; 250e4e83ea4SJ. Bruce Fields dp->dl_stateid.si_boot = boot_time; 2511da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2521da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 25373997dc4SJ. Bruce Fields dp->dl_stateid.si_generation = 1; 2546c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2551da177e4SLinus Torvalds dp->dl_time = 0; 2561da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 257b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2581da177e4SLinus Torvalds return dp; 2591da177e4SLinus Torvalds } 2601da177e4SLinus Torvalds 2611da177e4SLinus Torvalds void 2621da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2631da177e4SLinus Torvalds { 2641da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2651da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 26613cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2675b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 268ef0f3390SNeilBrown num_delegations--; 2691da177e4SLinus Torvalds } 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds 272acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 2731da177e4SLinus Torvalds { 274acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 275acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 276acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2774ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 278acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 279acfdf5c3SJ. Bruce Fields } 2801da177e4SLinus Torvalds } 2811da177e4SLinus Torvalds 2821da177e4SLinus Torvalds /* Called under the state lock. */ 2831da177e4SLinus Torvalds static void 2841da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2851da177e4SLinus Torvalds { 286ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2871da177e4SLinus Torvalds spin_lock(&recall_lock); 2885d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 2891da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2901da177e4SLinus Torvalds spin_unlock(&recall_lock); 291acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 2921da177e4SLinus Torvalds nfs4_put_delegation(dp); 2931da177e4SLinus Torvalds } 2941da177e4SLinus Torvalds 2951da177e4SLinus Torvalds /* 2961da177e4SLinus Torvalds * SETCLIENTID state 2971da177e4SLinus Torvalds */ 2981da177e4SLinus Torvalds 29936acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3009089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3019089f1b4SBenny Halevy 3021da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3031da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3041da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3051da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3061da177e4SLinus Torvalds 307ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 308ddc04c41SJ. Bruce Fields { 309ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 310ddc04c41SJ. Bruce Fields } 311ddc04c41SJ. Bruce Fields 312ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 313ddc04c41SJ. Bruce Fields { 314ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 315ddc04c41SJ. Bruce Fields } 316ddc04c41SJ. Bruce Fields 3171da177e4SLinus Torvalds /* 3181da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3191da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3201da177e4SLinus Torvalds * 3211da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3221da177e4SLinus Torvalds * setclientid_confirmed info. 3231da177e4SLinus Torvalds * 3241da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3251da177e4SLinus Torvalds * setclientid info. 3261da177e4SLinus Torvalds * 3271da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3281da177e4SLinus Torvalds * for lease renewal. 3291da177e4SLinus Torvalds * 3301da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3311da177e4SLinus Torvalds * for last close replay. 3321da177e4SLinus Torvalds */ 3331da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3341da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3351da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3361da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3371da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3381da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3391da177e4SLinus Torvalds static struct list_head client_lru; 3401da177e4SLinus Torvalds static struct list_head close_lru; 3411da177e4SLinus Torvalds 342f9d7562fSJ. Bruce Fields /* 343f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 344f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 345f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 346f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 347f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 348f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 349f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 350f9d7562fSJ. Bruce Fields * 351f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 352f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 353f9d7562fSJ. Bruce Fields * 354f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 355f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 356f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 357f9d7562fSJ. Bruce Fields * 358f9d7562fSJ. Bruce Fields * which we should reject. 359f9d7562fSJ. Bruce Fields */ 360f9d7562fSJ. Bruce Fields static void 361f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 362f9d7562fSJ. Bruce Fields int i; 363f9d7562fSJ. Bruce Fields 364f9d7562fSJ. Bruce Fields *access = 0; 365f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 366f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 367f9d7562fSJ. Bruce Fields *access |= i; 368f9d7562fSJ. Bruce Fields } 369f9d7562fSJ. Bruce Fields } 370f9d7562fSJ. Bruce Fields 371f9d7562fSJ. Bruce Fields static void 372f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 373f9d7562fSJ. Bruce Fields int i; 374f9d7562fSJ. Bruce Fields 375f9d7562fSJ. Bruce Fields *deny = 0; 376f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 377f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 378f9d7562fSJ. Bruce Fields *deny |= i ; 379f9d7562fSJ. Bruce Fields } 380f9d7562fSJ. Bruce Fields } 381f9d7562fSJ. Bruce Fields 382f9d7562fSJ. Bruce Fields static int 383f9d7562fSJ. Bruce Fields test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 384f9d7562fSJ. Bruce Fields unsigned int access, deny; 385f9d7562fSJ. Bruce Fields 386f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 387f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 388f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 389f9d7562fSJ. Bruce Fields return 0; 390f9d7562fSJ. Bruce Fields return 1; 391f9d7562fSJ. Bruce Fields } 392f9d7562fSJ. Bruce Fields 393f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 394f9d7562fSJ. Bruce Fields { 3958f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 396f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 397f9d7562fSJ. Bruce Fields return O_RDONLY; 398f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 399f9d7562fSJ. Bruce Fields return O_WRONLY; 400f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 401f9d7562fSJ. Bruce Fields return O_RDWR; 402f9d7562fSJ. Bruce Fields } 403f9d7562fSJ. Bruce Fields BUG(); 404f9d7562fSJ. Bruce Fields } 405f9d7562fSJ. Bruce Fields 406529d7b2aSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 407529d7b2aSJ. Bruce Fields { 408529d7b2aSJ. Bruce Fields list_del(&stp->st_hash); 409529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 410529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 411529d7b2aSJ. Bruce Fields } 412529d7b2aSJ. Bruce Fields 413529d7b2aSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 414529d7b2aSJ. Bruce Fields { 415499f3edcSJ. Bruce Fields int i; 4160997b173SJ. Bruce Fields 41723fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 418499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 419499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 420499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 421499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 422499f3edcSJ. Bruce Fields } 42323fcf2ecSJ. Bruce Fields } 424a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 425529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 426529d7b2aSJ. Bruce Fields } 427529d7b2aSJ. Bruce Fields 428529d7b2aSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 429529d7b2aSJ. Bruce Fields { 430529d7b2aSJ. Bruce Fields struct file *file; 431529d7b2aSJ. Bruce Fields 432529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 433529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 434529d7b2aSJ. Bruce Fields if (file) 435529d7b2aSJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)stp->st_stateowner); 436529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 437529d7b2aSJ. Bruce Fields } 438529d7b2aSJ. Bruce Fields 439529d7b2aSJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 440529d7b2aSJ. Bruce Fields { 441529d7b2aSJ. Bruce Fields struct nfs4_stateid *stp; 442529d7b2aSJ. Bruce Fields 443529d7b2aSJ. Bruce Fields list_del(&sop->so_idhash); 444529d7b2aSJ. Bruce Fields list_del(&sop->so_strhash); 445529d7b2aSJ. Bruce Fields list_del(&sop->so_perstateid); 446529d7b2aSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 447529d7b2aSJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 448529d7b2aSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 449529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 450529d7b2aSJ. Bruce Fields } 451529d7b2aSJ. Bruce Fields } 452529d7b2aSJ. Bruce Fields 453529d7b2aSJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 454529d7b2aSJ. Bruce Fields { 455529d7b2aSJ. Bruce Fields unhash_lockowner(sop); 456529d7b2aSJ. Bruce Fields nfs4_put_stateowner(sop); 457529d7b2aSJ. Bruce Fields } 458529d7b2aSJ. Bruce Fields 459529d7b2aSJ. Bruce Fields static void 460529d7b2aSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 461529d7b2aSJ. Bruce Fields { 462529d7b2aSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 463529d7b2aSJ. Bruce Fields 464529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 465529d7b2aSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 466529d7b2aSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 467529d7b2aSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 468529d7b2aSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 469529d7b2aSJ. Bruce Fields release_lockowner(lock_sop); 470529d7b2aSJ. Bruce Fields } 471529d7b2aSJ. Bruce Fields } 472529d7b2aSJ. Bruce Fields 4732283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 4742283963fSJ. Bruce Fields { 4752283963fSJ. Bruce Fields unhash_generic_stateid(stp); 4762283963fSJ. Bruce Fields release_stateid_lockowners(stp); 4772283963fSJ. Bruce Fields free_generic_stateid(stp); 4782283963fSJ. Bruce Fields } 4792283963fSJ. Bruce Fields 480f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 481f1d110caSJ. Bruce Fields { 482f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 483f1d110caSJ. Bruce Fields 484f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 485f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 486f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 487f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 488f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 489f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 490f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 491f1d110caSJ. Bruce Fields release_open_stateid(stp); 492f1d110caSJ. Bruce Fields } 493f1d110caSJ. Bruce Fields } 494f1d110caSJ. Bruce Fields 495f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 496f1d110caSJ. Bruce Fields { 497f044ff83SJ. Bruce Fields unhash_openowner(sop); 498f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 499f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 500f1d110caSJ. Bruce Fields } 501f1d110caSJ. Bruce Fields 5025282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 5035282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 5045282fd72SMarc Eshel 5055282fd72SMarc Eshel static inline int 5065282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 5075282fd72SMarc Eshel { 5085282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 5095282fd72SMarc Eshel 5105282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 5115282fd72SMarc Eshel } 5125282fd72SMarc Eshel 5135282fd72SMarc Eshel static inline void 5145282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 5155282fd72SMarc Eshel { 5165282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 5175282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 5185282fd72SMarc Eshel } 5195282fd72SMarc Eshel 520ec6b5d7bSAndy Adamson static void 521ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 522ec6b5d7bSAndy Adamson { 523ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 524ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 525ec6b5d7bSAndy Adamson 526ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 527ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 528ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 529ec6b5d7bSAndy Adamson sid->reserved = 0; 530ec6b5d7bSAndy Adamson } 531ec6b5d7bSAndy Adamson 532ec6b5d7bSAndy Adamson /* 533a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 534a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 535a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 536a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 537a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 538a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 539a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 540a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 541a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 542a649637cSAndy Adamson * for the SEQUENCE op response: 543ec6b5d7bSAndy Adamson */ 544a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 545a649637cSAndy Adamson 546557ce264SAndy Adamson static void 547557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 548557ce264SAndy Adamson { 549557ce264SAndy Adamson int i; 550557ce264SAndy Adamson 551557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 552557ce264SAndy Adamson kfree(ses->se_slots[i]); 553557ce264SAndy Adamson } 554557ce264SAndy Adamson 555efe0cb6dSJ. Bruce Fields /* 556efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 557efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 558efe0cb6dSJ. Bruce Fields */ 559efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 560efe0cb6dSJ. Bruce Fields { 561efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 562efe0cb6dSJ. Bruce Fields } 563efe0cb6dSJ. Bruce Fields 5645b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 565ec6b5d7bSAndy Adamson { 5665b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 5675b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 568ec6b5d7bSAndy Adamson 5695b6feee9SJ. Bruce Fields return size; 570557ce264SAndy Adamson } 571557ce264SAndy Adamson 5725b6feee9SJ. Bruce Fields /* 5735b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 5745b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 5755b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 5765b6feee9SJ. Bruce Fields */ 5775b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 5785b6feee9SJ. Bruce Fields { 5795b6feee9SJ. Bruce Fields int avail; 5805b6feee9SJ. Bruce Fields 5815b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 5825b6feee9SJ. Bruce Fields 5835b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5845b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 5855b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 5865b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 5875b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 5885b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5895b6feee9SJ. Bruce Fields 5905b6feee9SJ. Bruce Fields return num; 5915b6feee9SJ. Bruce Fields } 5925b6feee9SJ. Bruce Fields 5935b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 5945b6feee9SJ. Bruce Fields { 5955b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5965b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 5975b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5985b6feee9SJ. Bruce Fields } 5995b6feee9SJ. Bruce Fields 6005b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 6015b6feee9SJ. Bruce Fields { 6025b6feee9SJ. Bruce Fields struct nfsd4_session *new; 6035b6feee9SJ. Bruce Fields int mem, i; 604ec6b5d7bSAndy Adamson 605c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 606ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 6075b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 608ec6b5d7bSAndy Adamson 6095b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 6106c18ba9fSAlexandros Batsakis if (!new) 6115b6feee9SJ. Bruce Fields return NULL; 612ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 6135b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 6145b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 6155b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 6165b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 617ec6b5d7bSAndy Adamson goto out_free; 618ec6b5d7bSAndy Adamson } 6195b6feee9SJ. Bruce Fields return new; 6205b6feee9SJ. Bruce Fields out_free: 6215b6feee9SJ. Bruce Fields while (i--) 6225b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 6235b6feee9SJ. Bruce Fields kfree(new); 6245b6feee9SJ. Bruce Fields return NULL; 6255b6feee9SJ. Bruce Fields } 6265b6feee9SJ. Bruce Fields 6275b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 6285b6feee9SJ. Bruce Fields { 6295b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 6305b6feee9SJ. Bruce Fields 6315b6feee9SJ. Bruce Fields new->maxreqs = numslots; 632d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 633d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 6345b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 6355b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 6365b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 6375b6feee9SJ. Bruce Fields } 6385b6feee9SJ. Bruce Fields 63919cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 64019cf5c02SJ. Bruce Fields { 64119cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 64219cf5c02SJ. Bruce Fields kfree(c); 64319cf5c02SJ. Bruce Fields } 64419cf5c02SJ. Bruce Fields 64519cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 64619cf5c02SJ. Bruce Fields { 64719cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 64819cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 64919cf5c02SJ. Bruce Fields 65019cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 65119cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 65219cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 65319cf5c02SJ. Bruce Fields free_conn(c); 65419cf5c02SJ. Bruce Fields } 65519cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 656eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 65719cf5c02SJ. Bruce Fields } 65819cf5c02SJ. Bruce Fields 659d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 660c7662518SJ. Bruce Fields { 661c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 662c7662518SJ. Bruce Fields 663c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 664c7662518SJ. Bruce Fields if (!conn) 665db90681dSJ. Bruce Fields return NULL; 666c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 667c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 668d29c374cSJ. Bruce Fields conn->cn_flags = flags; 669db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 670db90681dSJ. Bruce Fields return conn; 671db90681dSJ. Bruce Fields } 672db90681dSJ. Bruce Fields 673328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 674328ead28SJ. Bruce Fields { 675328ead28SJ. Bruce Fields conn->cn_session = ses; 676328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 677328ead28SJ. Bruce Fields } 678328ead28SJ. Bruce Fields 679db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 680db90681dSJ. Bruce Fields { 681db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 682c7662518SJ. Bruce Fields 683c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 684328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 685c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 686db90681dSJ. Bruce Fields } 687c7662518SJ. Bruce Fields 68821b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 689db90681dSJ. Bruce Fields { 69019cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 69121b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 692db90681dSJ. Bruce Fields } 693db90681dSJ. Bruce Fields 6941d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 695db90681dSJ. Bruce Fields { 696db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 69721b75b01SJ. Bruce Fields int ret; 698db90681dSJ. Bruce Fields 6991d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 700db90681dSJ. Bruce Fields if (!conn) 701db90681dSJ. Bruce Fields return nfserr_jukebox; 702db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 70321b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 70421b75b01SJ. Bruce Fields if (ret) 70521b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 70621b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 707c7662518SJ. Bruce Fields return nfs_ok; 708c7662518SJ. Bruce Fields } 709c7662518SJ. Bruce Fields 7101d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 7111d1bc8f2SJ. Bruce Fields { 7121d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 7131d1bc8f2SJ. Bruce Fields 7141d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 7151d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 7161d1bc8f2SJ. Bruce Fields 7171d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 7181d1bc8f2SJ. Bruce Fields } 7191d1bc8f2SJ. Bruce Fields 7201d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 72119cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 722c7662518SJ. Bruce Fields { 72319cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 72419cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 72519cf5c02SJ. Bruce Fields 72619cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 72719cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 72819cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 72919cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 73019cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 73119cf5c02SJ. Bruce Fields 73219cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 73319cf5c02SJ. Bruce Fields free_conn(c); 73419cf5c02SJ. Bruce Fields 73519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 73619cf5c02SJ. Bruce Fields } 73719cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 738c7662518SJ. Bruce Fields } 739c7662518SJ. Bruce Fields 740c7662518SJ. Bruce Fields void free_session(struct kref *kref) 741c7662518SJ. Bruce Fields { 742c7662518SJ. Bruce Fields struct nfsd4_session *ses; 743c7662518SJ. Bruce Fields int mem; 744c7662518SJ. Bruce Fields 745c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 74619cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 747c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 748c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 749c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 750c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 751c7662518SJ. Bruce Fields free_session_slots(ses); 752c7662518SJ. Bruce Fields kfree(ses); 753c7662518SJ. Bruce Fields } 754c7662518SJ. Bruce Fields 755ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7565b6feee9SJ. Bruce Fields { 7575b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7585b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7595b6feee9SJ. Bruce Fields int numslots, slotsize; 760c7662518SJ. Bruce Fields int status; 7615b6feee9SJ. Bruce Fields int idx; 7625b6feee9SJ. Bruce Fields 7635b6feee9SJ. Bruce Fields /* 7645b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7655b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7665b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7675b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7685b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7695b6feee9SJ. Bruce Fields */ 7705b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7715b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 772ced6dfe9SMi Jinlong if (numslots < 1) 773ced6dfe9SMi Jinlong return NULL; 7745b6feee9SJ. Bruce Fields 7755b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7765b6feee9SJ. Bruce Fields if (!new) { 7775b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 778ac7c46f2SJ. Bruce Fields return NULL; 7795b6feee9SJ. Bruce Fields } 7805b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 781ec6b5d7bSAndy Adamson 782ec6b5d7bSAndy Adamson new->se_client = clp; 783ec6b5d7bSAndy Adamson gen_sessionid(new); 784ec6b5d7bSAndy Adamson 785c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 786c7662518SJ. Bruce Fields 787ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 788ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7898b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 790ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7915b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7929089f1b4SBenny Halevy spin_lock(&client_lock); 793ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 7944c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 795ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 7964c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 7979089f1b4SBenny Halevy spin_unlock(&client_lock); 798ec6b5d7bSAndy Adamson 7991d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 800ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 801c7662518SJ. Bruce Fields if (status) { 802c7662518SJ. Bruce Fields free_session(&new->se_ref); 803ac7c46f2SJ. Bruce Fields return NULL; 804c7662518SJ. Bruce Fields } 805dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 806edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 807dcbeaa68SJ. Bruce Fields /* 808dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 809dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 810dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 811dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 812dcbeaa68SJ. Bruce Fields * future: 813dcbeaa68SJ. Bruce Fields */ 814edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 815edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 816edd76786SJ. Bruce Fields } 817dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 818ac7c46f2SJ. Bruce Fields return new; 819ec6b5d7bSAndy Adamson } 820ec6b5d7bSAndy Adamson 8219089f1b4SBenny Halevy /* caller must hold client_lock */ 8225282fd72SMarc Eshel static struct nfsd4_session * 8235282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 8245282fd72SMarc Eshel { 8255282fd72SMarc Eshel struct nfsd4_session *elem; 8265282fd72SMarc Eshel int idx; 8275282fd72SMarc Eshel 8285282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 8295282fd72SMarc Eshel idx = hash_sessionid(sessionid); 8305282fd72SMarc Eshel /* Search in the appropriate list */ 8315282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8325282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8335282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8345282fd72SMarc Eshel return elem; 8355282fd72SMarc Eshel } 8365282fd72SMarc Eshel } 8375282fd72SMarc Eshel 8385282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8395282fd72SMarc Eshel return NULL; 8405282fd72SMarc Eshel } 8415282fd72SMarc Eshel 8429089f1b4SBenny Halevy /* caller must hold client_lock */ 8437116ed6bSAndy Adamson static void 8445282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8457116ed6bSAndy Adamson { 8467116ed6bSAndy Adamson list_del(&ses->se_hash); 8474c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 8487116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8494c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 8505282fd72SMarc Eshel } 8515282fd72SMarc Eshel 85236acb66bSBenny Halevy /* must be called under the client_lock */ 8531da177e4SLinus Torvalds static inline void 85436acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8551da177e4SLinus Torvalds { 85607cd4909SBenny Halevy if (is_client_expired(clp)) { 85707cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 85807cd4909SBenny Halevy __func__, 85907cd4909SBenny Halevy clp->cl_clientid.cl_boot, 86007cd4909SBenny Halevy clp->cl_clientid.cl_id); 86107cd4909SBenny Halevy return; 86207cd4909SBenny Halevy } 86307cd4909SBenny Halevy 8641da177e4SLinus Torvalds /* 8651da177e4SLinus Torvalds * Move client to the end to the LRU list. 8661da177e4SLinus Torvalds */ 8671da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8681da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8691da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8701da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8711da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8721da177e4SLinus Torvalds } 8731da177e4SLinus Torvalds 87436acb66bSBenny Halevy static inline void 87536acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 87636acb66bSBenny Halevy { 87736acb66bSBenny Halevy spin_lock(&client_lock); 87836acb66bSBenny Halevy renew_client_locked(clp); 87936acb66bSBenny Halevy spin_unlock(&client_lock); 88036acb66bSBenny Halevy } 88136acb66bSBenny Halevy 8821da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8831da177e4SLinus Torvalds static int 8841da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8851da177e4SLinus Torvalds { 8861da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8871da177e4SLinus Torvalds return 0; 88860adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 88960adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8901da177e4SLinus Torvalds return 1; 8911da177e4SLinus Torvalds } 8921da177e4SLinus Torvalds 8931da177e4SLinus Torvalds /* 8941da177e4SLinus Torvalds * XXX Should we use a slab cache ? 8951da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 8961da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 8971da177e4SLinus Torvalds */ 89835bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 8991da177e4SLinus Torvalds { 9001da177e4SLinus Torvalds struct nfs4_client *clp; 9011da177e4SLinus Torvalds 90235bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 90335bba9a3SJ. Bruce Fields if (clp == NULL) 90435bba9a3SJ. Bruce Fields return NULL; 90535bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 90635bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 90735bba9a3SJ. Bruce Fields kfree(clp); 90835bba9a3SJ. Bruce Fields return NULL; 90935bba9a3SJ. Bruce Fields } 9101da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 9111da177e4SLinus Torvalds clp->cl_name.len = name.len; 9121da177e4SLinus Torvalds return clp; 9131da177e4SLinus Torvalds } 9141da177e4SLinus Torvalds 9151da177e4SLinus Torvalds static inline void 9161da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 9171da177e4SLinus Torvalds { 918792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 919792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 920792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 921792c95ddSJ. Bruce Fields se_perclnt); 922792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 923792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 924792c95ddSJ. Bruce Fields } 9251da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 9261da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 92768e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 9281da177e4SLinus Torvalds kfree(clp->cl_name.data); 9291da177e4SLinus Torvalds kfree(clp); 9301da177e4SLinus Torvalds } 9311da177e4SLinus Torvalds 932d7682988SBenny Halevy void 933d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 934d7682988SBenny Halevy { 935d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 936d7682988SBenny Halevy 937d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 938d7682988SBenny Halevy return; 939d7682988SBenny Halevy if (is_client_expired(clp)) { 940d7682988SBenny Halevy free_client(clp); 941d7682988SBenny Halevy session->se_client = NULL; 942d7682988SBenny Halevy } else 943d7682988SBenny Halevy renew_client_locked(clp); 944d7682988SBenny Halevy spin_unlock(&client_lock); 945d7682988SBenny Halevy } 946d7682988SBenny Halevy 94784d38ac9SBenny Halevy /* must be called under the client_lock */ 94884d38ac9SBenny Halevy static inline void 94984d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 95084d38ac9SBenny Halevy { 951792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 952792c95ddSJ. Bruce Fields 95307cd4909SBenny Halevy mark_client_expired(clp); 95484d38ac9SBenny Halevy list_del(&clp->cl_lru); 9554c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 956792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 957792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 9584c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 95984d38ac9SBenny Halevy } 96084d38ac9SBenny Halevy 9611da177e4SLinus Torvalds static void 9621da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9631da177e4SLinus Torvalds { 9641da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9651da177e4SLinus Torvalds struct nfs4_delegation *dp; 9661da177e4SLinus Torvalds struct list_head reaplist; 9671da177e4SLinus Torvalds 9681da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9691da177e4SLinus Torvalds spin_lock(&recall_lock); 970ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 971ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 972ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9731da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9741da177e4SLinus Torvalds } 9751da177e4SLinus Torvalds spin_unlock(&recall_lock); 9761da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9771da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9781da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9791da177e4SLinus Torvalds unhash_delegation(dp); 9801da177e4SLinus Torvalds } 981ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 982ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 983f044ff83SJ. Bruce Fields release_openowner(sop); 9841da177e4SLinus Torvalds } 9856ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9862bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9872bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 98884d38ac9SBenny Halevy list_del(&clp->cl_idhash); 98984d38ac9SBenny Halevy list_del(&clp->cl_strhash); 99084d38ac9SBenny Halevy spin_lock(&client_lock); 99184d38ac9SBenny Halevy unhash_client_locked(clp); 99246583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 993b12a05cbSJ. Bruce Fields free_client(clp); 99446583e25SBenny Halevy spin_unlock(&client_lock); 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 99735bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 99835bba9a3SJ. Bruce Fields { 99935bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 100035bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds 100335bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 100435bba9a3SJ. Bruce Fields { 10051da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 10061da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 100935bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 101035bba9a3SJ. Bruce Fields { 10111da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 10121da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 10131da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 10141da177e4SLinus Torvalds get_group_info(target->cr_group_info); 10151da177e4SLinus Torvalds } 10161da177e4SLinus Torvalds 101735bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1018599e0a22SJ. Bruce Fields { 1019a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds static int 1023599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1024599e0a22SJ. Bruce Fields { 1025599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds static int 1029599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1030599e0a22SJ. Bruce Fields { 1031599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds /* XXX what about NGROUP */ 10351da177e4SLinus Torvalds static int 1036599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1037599e0a22SJ. Bruce Fields { 1038599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10415ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10425ec7b46cSJ. Bruce Fields { 10435ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10445ec7b46cSJ. Bruce Fields 10451da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10461da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds 1049deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1050deda2faaSJ. Bruce Fields { 1051deda2faaSJ. Bruce Fields static u32 i; 10521da177e4SLinus Torvalds u32 *p; 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1055deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1056deda2faaSJ. Bruce Fields *p++ = i++; 10571da177e4SLinus Torvalds } 10581da177e4SLinus Torvalds 1059b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1060b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1061b09333c4SRicardo Labiaga { 1062b09333c4SRicardo Labiaga struct nfs4_client *clp; 1063b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1064b09333c4SRicardo Labiaga char *princ; 1065b09333c4SRicardo Labiaga 1066b09333c4SRicardo Labiaga clp = alloc_client(name); 1067b09333c4SRicardo Labiaga if (clp == NULL) 1068b09333c4SRicardo Labiaga return NULL; 1069b09333c4SRicardo Labiaga 1070792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1071792c95ddSJ. Bruce Fields 1072b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1073b09333c4SRicardo Labiaga if (princ) { 1074b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1075b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1076b09333c4SRicardo Labiaga free_client(clp); 1077b09333c4SRicardo Labiaga return NULL; 1078b09333c4SRicardo Labiaga } 1079b09333c4SRicardo Labiaga } 1080b09333c4SRicardo Labiaga 1081b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 108246583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 108377a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1084b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1085b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1086b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1087b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1088b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10895ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 10906ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1091cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 109207cd4909SBenny Halevy clp->cl_time = get_seconds(); 1093b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1094b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1095b09333c4SRicardo Labiaga copy_verf(clp, verf); 1096b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1097b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1098b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1099b09333c4SRicardo Labiaga gen_confirm(clp); 1100edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1101b09333c4SRicardo Labiaga return clp; 1102b09333c4SRicardo Labiaga } 1103b09333c4SRicardo Labiaga 110435bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 110535bba9a3SJ. Bruce Fields { 11061da177e4SLinus Torvalds if (name.len == 0) 11071da177e4SLinus Torvalds return 0; 11081da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 11092fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 11101da177e4SLinus Torvalds return 0; 11111da177e4SLinus Torvalds } 11121da177e4SLinus Torvalds return 1; 11131da177e4SLinus Torvalds } 11141da177e4SLinus Torvalds 1115fd39ca9aSNeilBrown static void 11161da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 11171da177e4SLinus Torvalds { 11181da177e4SLinus Torvalds unsigned int idhashval; 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 11211da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11221da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 112336acb66bSBenny Halevy renew_client(clp); 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 1126fd39ca9aSNeilBrown static void 11271da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 11281da177e4SLinus Torvalds { 11291da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11301da177e4SLinus Torvalds unsigned int strhashval; 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1133f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1134a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1135328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11361da177e4SLinus Torvalds renew_client(clp); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds static struct nfs4_client * 11401da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11411da177e4SLinus Torvalds { 11421da177e4SLinus Torvalds struct nfs4_client *clp; 11431da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1146599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11471da177e4SLinus Torvalds return clp; 11481da177e4SLinus Torvalds } 11491da177e4SLinus Torvalds return NULL; 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static struct nfs4_client * 11531da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11541da177e4SLinus Torvalds { 11551da177e4SLinus Torvalds struct nfs4_client *clp; 11561da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11571da177e4SLinus Torvalds 11581da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1159599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11601da177e4SLinus Torvalds return clp; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds return NULL; 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 11656e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1166a1bcecd2SAndy Adamson { 11676e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1168a1bcecd2SAndy Adamson } 1169a1bcecd2SAndy Adamson 117028ce6054SNeilBrown static struct nfs4_client * 1171e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 117228ce6054SNeilBrown { 117328ce6054SNeilBrown struct nfs4_client *clp; 117428ce6054SNeilBrown 117528ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1176e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 117728ce6054SNeilBrown return clp; 117828ce6054SNeilBrown } 117928ce6054SNeilBrown return NULL; 118028ce6054SNeilBrown } 118128ce6054SNeilBrown 118228ce6054SNeilBrown static struct nfs4_client * 1183e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 118428ce6054SNeilBrown { 118528ce6054SNeilBrown struct nfs4_client *clp; 118628ce6054SNeilBrown 118728ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1188e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 118928ce6054SNeilBrown return clp; 119028ce6054SNeilBrown } 119128ce6054SNeilBrown return NULL; 119228ce6054SNeilBrown } 119328ce6054SNeilBrown 11946f3d772fSTakuma Umeya static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) 11956f3d772fSTakuma Umeya { 11966f3d772fSTakuma Umeya switch (family) { 11976f3d772fSTakuma Umeya case AF_INET: 11986f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_family = AF_INET; 11996f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; 12006f3d772fSTakuma Umeya return; 12016f3d772fSTakuma Umeya case AF_INET6: 12026f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; 12036f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; 12046f3d772fSTakuma Umeya return; 12056f3d772fSTakuma Umeya } 12066f3d772fSTakuma Umeya } 12076f3d772fSTakuma Umeya 1208fd39ca9aSNeilBrown static void 12096f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 12101da177e4SLinus Torvalds { 121107263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 12126f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 12136f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 12147077ecbaSJeff Layton unsigned short expected_family; 12151da177e4SLinus Torvalds 12167077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 12177077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 12187077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 12197077ecbaSJeff Layton expected_family = AF_INET; 12207077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 12217077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 12227077ecbaSJeff Layton expected_family = AF_INET6; 12237077ecbaSJeff Layton else 12241da177e4SLinus Torvalds goto out_err; 12251da177e4SLinus Torvalds 122607263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1227aa9a4ec7SJeff Layton se->se_callback_addr_len, 122807263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 122907263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1230aa9a4ec7SJeff Layton 123107263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 12321da177e4SLinus Torvalds goto out_err; 1233aa9a4ec7SJeff Layton 123407263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 123507263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1236fbf4665fSJeff Layton 123707263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 123807263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12396f3d772fSTakuma Umeya rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); 12401da177e4SLinus Torvalds return; 12411da177e4SLinus Torvalds out_err: 124207263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 124307263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1244849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12451da177e4SLinus Torvalds "will not receive delegations\n", 12461da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds return; 12491da177e4SLinus Torvalds } 12501da177e4SLinus Torvalds 1251074fe897SAndy Adamson /* 1252557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1253074fe897SAndy Adamson */ 1254074fe897SAndy Adamson void 1255074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1256074fe897SAndy Adamson { 1257557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1258557ce264SAndy Adamson unsigned int base; 1259074fe897SAndy Adamson 1260557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1261074fe897SAndy Adamson 1262557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1263557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1264bf864a31SAndy Adamson 1265bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1266557ce264SAndy Adamson slot->sl_datalen = 0; 1267bf864a31SAndy Adamson return; 1268bf864a31SAndy Adamson } 1269557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1270557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1271557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1272557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1273557ce264SAndy Adamson slot->sl_datalen)) 1274557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1275557ce264SAndy Adamson return; 1276074fe897SAndy Adamson } 1277074fe897SAndy Adamson 1278074fe897SAndy Adamson /* 1279abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1280abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1281abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1282abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1283abfabf8cSAndy Adamson * 1284074fe897SAndy Adamson */ 1285abfabf8cSAndy Adamson static __be32 1286abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1287abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1288074fe897SAndy Adamson { 1289abfabf8cSAndy Adamson struct nfsd4_op *op; 1290abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1291074fe897SAndy Adamson 1292abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1293557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1294abfabf8cSAndy Adamson 1295abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1296abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1297abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1298abfabf8cSAndy Adamson 1299abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1300557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1301abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1302abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1303abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1304074fe897SAndy Adamson } 1305abfabf8cSAndy Adamson return op->status; 1306074fe897SAndy Adamson } 1307074fe897SAndy Adamson 1308074fe897SAndy Adamson /* 1309557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1310557ce264SAndy Adamson * session values. 1311074fe897SAndy Adamson */ 1312074fe897SAndy Adamson __be32 1313bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1314bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1315074fe897SAndy Adamson { 1316557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1317074fe897SAndy Adamson __be32 status; 1318074fe897SAndy Adamson 1319557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1320074fe897SAndy Adamson 1321abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1322abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1323abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1324abfabf8cSAndy Adamson return status; 1325074fe897SAndy Adamson 1326557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1327557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1328074fe897SAndy Adamson 1329557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1330557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1331557ce264SAndy Adamson status = slot->sl_status; 1332074fe897SAndy Adamson 1333074fe897SAndy Adamson return status; 1334074fe897SAndy Adamson } 1335074fe897SAndy Adamson 13360733d213SAndy Adamson /* 13370733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13380733d213SAndy Adamson */ 13390733d213SAndy Adamson static void 13400733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13410733d213SAndy Adamson { 13420733d213SAndy Adamson /* pNFS is not supported */ 13430733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13440733d213SAndy Adamson 13450733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13460733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13470733d213SAndy Adamson 13480733d213SAndy Adamson /* set the wire flags to return to client. */ 13490733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13500733d213SAndy Adamson } 13510733d213SAndy Adamson 1352b37ad28bSAl Viro __be32 1353069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1354069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1355069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1356069b6ad4SAndy Adamson { 13570733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13580733d213SAndy Adamson int status; 13590733d213SAndy Adamson unsigned int strhashval; 13600733d213SAndy Adamson char dname[HEXDIR_LEN]; 1361363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13620733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1363363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13640733d213SAndy Adamson 1365363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13660733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1367363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13680733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1369363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13700733d213SAndy Adamson 13710733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13720733d213SAndy Adamson return nfserr_inval; 13730733d213SAndy Adamson 13740733d213SAndy Adamson /* Currently only support SP4_NONE */ 13750733d213SAndy Adamson switch (exid->spa_how) { 13760733d213SAndy Adamson case SP4_NONE: 13770733d213SAndy Adamson break; 13780733d213SAndy Adamson case SP4_SSV: 1379044bc1d4SJ. Bruce Fields return nfserr_serverfault; 13800733d213SAndy Adamson default: 13810733d213SAndy Adamson BUG(); /* checked by xdr code */ 13820733d213SAndy Adamson case SP4_MACH_CRED: 13830733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13840733d213SAndy Adamson } 13850733d213SAndy Adamson 13860733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13870733d213SAndy Adamson 13880733d213SAndy Adamson if (status) 13890733d213SAndy Adamson goto error; 13900733d213SAndy Adamson 13910733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13920733d213SAndy Adamson 13930733d213SAndy Adamson nfs4_lock_state(); 13940733d213SAndy Adamson status = nfs_ok; 13950733d213SAndy Adamson 1396e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 13970733d213SAndy Adamson if (conf) { 1398e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1399e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1400e203d506SJ. Bruce Fields goto out; 1401e203d506SJ. Bruce Fields } 14020733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 14030733d213SAndy Adamson /* 18.35.4 case 8 */ 14040733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14050733d213SAndy Adamson status = nfserr_not_same; 14060733d213SAndy Adamson goto out; 14070733d213SAndy Adamson } 14080733d213SAndy Adamson /* Client reboot: destroy old state */ 14090733d213SAndy Adamson expire_client(conf); 14100733d213SAndy Adamson goto out_new; 14110733d213SAndy Adamson } 14120733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 14130733d213SAndy Adamson /* 18.35.4 case 9 */ 14140733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14150733d213SAndy Adamson status = nfserr_perm; 14160733d213SAndy Adamson goto out; 14170733d213SAndy Adamson } 14180733d213SAndy Adamson expire_client(conf); 14190733d213SAndy Adamson goto out_new; 14200733d213SAndy Adamson } 14210733d213SAndy Adamson /* 14220733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 14230733d213SAndy Adamson * confirmed client id (18.35.3). 14240733d213SAndy Adamson */ 14250733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 14260733d213SAndy Adamson 14270733d213SAndy Adamson /* 14280733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 14290733d213SAndy Adamson * Leave confirmed record intact and return same result. 14300733d213SAndy Adamson */ 14310733d213SAndy Adamson copy_verf(conf, &verf); 14320733d213SAndy Adamson new = conf; 14330733d213SAndy Adamson goto out_copy; 14346ddbbbfeSMike Sager } 14356ddbbbfeSMike Sager 14360733d213SAndy Adamson /* 18.35.4 case 7 */ 14370733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14380733d213SAndy Adamson status = nfserr_noent; 14390733d213SAndy Adamson goto out; 14400733d213SAndy Adamson } 14410733d213SAndy Adamson 1442e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 14430733d213SAndy Adamson if (unconf) { 14440733d213SAndy Adamson /* 14450733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14460733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14470733d213SAndy Adamson * of whether any properties have changed. 14480733d213SAndy Adamson */ 14490733d213SAndy Adamson expire_client(unconf); 14500733d213SAndy Adamson } 14510733d213SAndy Adamson 14520733d213SAndy Adamson out_new: 14530733d213SAndy Adamson /* Normal case */ 1454b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14550733d213SAndy Adamson if (new == NULL) { 14564731030dSJ. Bruce Fields status = nfserr_jukebox; 14570733d213SAndy Adamson goto out; 14580733d213SAndy Adamson } 14590733d213SAndy Adamson 14600733d213SAndy Adamson gen_clid(new); 14610733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14620733d213SAndy Adamson out_copy: 14630733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14640733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14650733d213SAndy Adamson 146638eb76a5SAndy Adamson exid->seqid = 1; 14670733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14680733d213SAndy Adamson 14690733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 147049557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14710733d213SAndy Adamson status = nfs_ok; 14720733d213SAndy Adamson 14730733d213SAndy Adamson out: 14740733d213SAndy Adamson nfs4_unlock_state(); 14750733d213SAndy Adamson error: 14760733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14770733d213SAndy Adamson return status; 1478069b6ad4SAndy Adamson } 1479069b6ad4SAndy Adamson 1480b85d4c01SBenny Halevy static int 148188e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1482b85d4c01SBenny Halevy { 148388e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 148488e588d5SAndy Adamson slot_seqid); 1485b85d4c01SBenny Halevy 1486b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 148788e588d5SAndy Adamson if (slot_inuse) { 148888e588d5SAndy Adamson if (seqid == slot_seqid) 1489b85d4c01SBenny Halevy return nfserr_jukebox; 1490b85d4c01SBenny Halevy else 1491b85d4c01SBenny Halevy return nfserr_seq_misordered; 1492b85d4c01SBenny Halevy } 1493b85d4c01SBenny Halevy /* Normal */ 149488e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1495b85d4c01SBenny Halevy return nfs_ok; 1496b85d4c01SBenny Halevy /* Replay */ 149788e588d5SAndy Adamson if (seqid == slot_seqid) 1498b85d4c01SBenny Halevy return nfserr_replay_cache; 1499b85d4c01SBenny Halevy /* Wraparound */ 150088e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1501b85d4c01SBenny Halevy return nfs_ok; 1502b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1503b85d4c01SBenny Halevy return nfserr_seq_misordered; 1504b85d4c01SBenny Halevy } 1505b85d4c01SBenny Halevy 150649557cc7SAndy Adamson /* 150749557cc7SAndy Adamson * Cache the create session result into the create session single DRC 150849557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 150949557cc7SAndy Adamson * Do this for solo or embedded create session operations. 151049557cc7SAndy Adamson */ 151149557cc7SAndy Adamson static void 151249557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 151349557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 151449557cc7SAndy Adamson { 151549557cc7SAndy Adamson slot->sl_status = nfserr; 151649557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 151749557cc7SAndy Adamson } 151849557cc7SAndy Adamson 151949557cc7SAndy Adamson static __be32 152049557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 152149557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 152249557cc7SAndy Adamson { 152349557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 152449557cc7SAndy Adamson return slot->sl_status; 152549557cc7SAndy Adamson } 152649557cc7SAndy Adamson 15271b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 15281b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 15291b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15301b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 15311b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15321b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 15331b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 15341b74c25bSMi Jinlong 15351b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 15361b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 15371b74c25bSMi Jinlong 1 + /* status */ \ 15381b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15391b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 15401b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15411b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 15421b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 15431b74c25bSMi Jinlong 15441b74c25bSMi Jinlong static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 15451b74c25bSMi Jinlong { 15461b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 15471b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 15481b74c25bSMi Jinlong } 15491b74c25bSMi Jinlong 1550069b6ad4SAndy Adamson __be32 1551069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1552069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1553069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1554069b6ad4SAndy Adamson { 1555363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1556ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1557ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 155849557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 155986c3e16cSJ. Bruce Fields bool confirm_me = false; 1560ec6b5d7bSAndy Adamson int status = 0; 1561ec6b5d7bSAndy Adamson 1562a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1563a62573dcSMi Jinlong return nfserr_inval; 1564a62573dcSMi Jinlong 1565ec6b5d7bSAndy Adamson nfs4_lock_state(); 1566ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1567ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1568ec6b5d7bSAndy Adamson 1569ec6b5d7bSAndy Adamson if (conf) { 157049557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 157149557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 157238eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1573ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 157449557cc7SAndy Adamson cs_slot->sl_seqid); 157538eb76a5SAndy Adamson /* Return the cached reply status */ 157649557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 157738eb76a5SAndy Adamson goto out; 157849557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1579ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1580ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1581ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 158249557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1583ec6b5d7bSAndy Adamson goto out; 1584ec6b5d7bSAndy Adamson } 1585ec6b5d7bSAndy Adamson } else if (unconf) { 1586ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1587363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1588ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1589ec6b5d7bSAndy Adamson goto out; 1590ec6b5d7bSAndy Adamson } 1591ec6b5d7bSAndy Adamson 159249557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 159349557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 159438eb76a5SAndy Adamson if (status) { 159538eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1596ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1597cd5b8144SJ. Bruce Fields goto out; 1598ec6b5d7bSAndy Adamson } 1599ec6b5d7bSAndy Adamson 160086c3e16cSJ. Bruce Fields confirm_me = true; 1601ec6b5d7bSAndy Adamson conf = unconf; 1602ec6b5d7bSAndy Adamson } else { 1603ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1604ec6b5d7bSAndy Adamson goto out; 1605ec6b5d7bSAndy Adamson } 1606ec6b5d7bSAndy Adamson 1607408b79bcSJ. Bruce Fields /* 16088323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 16098323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 16108323c3b2SJ. Bruce Fields */ 16118323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 16128323c3b2SJ. Bruce Fields /* 1613408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1614408b79bcSJ. Bruce Fields */ 1615408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1616408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1617408b79bcSJ. Bruce Fields 16181b74c25bSMi Jinlong status = nfserr_toosmall; 16191b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 16201b74c25bSMi Jinlong goto out; 16211b74c25bSMi Jinlong 1622ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1623ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1624ac7c46f2SJ. Bruce Fields if (!new) 1625ec6b5d7bSAndy Adamson goto out; 1626ac7c46f2SJ. Bruce Fields status = nfs_ok; 1627ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1628ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 162912050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 163012050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 163186c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 163249557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1633ec6b5d7bSAndy Adamson 163449557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 163549557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 163686c3e16cSJ. Bruce Fields if (confirm_me) 163786c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1638ec6b5d7bSAndy Adamson out: 1639ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1640ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1641ec6b5d7bSAndy Adamson return status; 1642069b6ad4SAndy Adamson } 1643069b6ad4SAndy Adamson 164457716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 164557716355SJ. Bruce Fields { 164657716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 164757716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 164857716355SJ. Bruce Fields 164957716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 165057716355SJ. Bruce Fields } 165157716355SJ. Bruce Fields 16521d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 16531d1bc8f2SJ. Bruce Fields { 16541d1bc8f2SJ. Bruce Fields switch (*dir) { 16551d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 16561d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 16571d1bc8f2SJ. Bruce Fields return nfs_ok; 16581d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 16591d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 16601d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 16611d1bc8f2SJ. Bruce Fields return nfs_ok; 16621d1bc8f2SJ. Bruce Fields }; 16631d1bc8f2SJ. Bruce Fields return nfserr_inval; 16641d1bc8f2SJ. Bruce Fields } 16651d1bc8f2SJ. Bruce Fields 16661d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 16671d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 16681d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 16691d1bc8f2SJ. Bruce Fields { 16701d1bc8f2SJ. Bruce Fields __be32 status; 16711d1bc8f2SJ. Bruce Fields 16721d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 16731d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 16741d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 16751d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 16761d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 16771d1bc8f2SJ. Bruce Fields * client_lock iself: */ 16781d1bc8f2SJ. Bruce Fields if (cstate->session) { 16791d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 16801d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 16811d1bc8f2SJ. Bruce Fields } 16821d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 16831d1bc8f2SJ. Bruce Fields if (!cstate->session) 16841d1bc8f2SJ. Bruce Fields return nfserr_badsession; 16851d1bc8f2SJ. Bruce Fields 16861d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 16871db2b9ddSBryan Schumaker if (!status) 16881d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 16891db2b9ddSBryan Schumaker return status; 16901d1bc8f2SJ. Bruce Fields } 16911d1bc8f2SJ. Bruce Fields 16925d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 16935d4cec2fSJ. Bruce Fields { 16945d4cec2fSJ. Bruce Fields if (!session) 16955d4cec2fSJ. Bruce Fields return 0; 16965d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 16975d4cec2fSJ. Bruce Fields } 16985d4cec2fSJ. Bruce Fields 1699069b6ad4SAndy Adamson __be32 1700069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1701069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1702069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1703069b6ad4SAndy Adamson { 1704e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1705e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1706e10e0cfcSBenny Halevy 1707e10e0cfcSBenny Halevy /* Notes: 1708e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1709e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1710e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1711e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1712e10e0cfcSBenny Halevy */ 1713e10e0cfcSBenny Halevy 17145d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 171557716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 171657716355SJ. Bruce Fields return nfserr_not_only_op; 171757716355SJ. Bruce Fields } 1718e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 17199089f1b4SBenny Halevy spin_lock(&client_lock); 1720e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1721e10e0cfcSBenny Halevy if (!ses) { 17229089f1b4SBenny Halevy spin_unlock(&client_lock); 1723e10e0cfcSBenny Halevy goto out; 1724e10e0cfcSBenny Halevy } 1725e10e0cfcSBenny Halevy 1726e10e0cfcSBenny Halevy unhash_session(ses); 17279089f1b4SBenny Halevy spin_unlock(&client_lock); 1728e10e0cfcSBenny Halevy 1729ab707e15SBenny Halevy nfs4_lock_state(); 173084f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1731ab707e15SBenny Halevy nfs4_unlock_state(); 173219cf5c02SJ. Bruce Fields 173319cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 173419cf5c02SJ. Bruce Fields 1735e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1736e10e0cfcSBenny Halevy status = nfs_ok; 1737e10e0cfcSBenny Halevy out: 1738e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1739e10e0cfcSBenny Halevy return status; 1740069b6ad4SAndy Adamson } 1741069b6ad4SAndy Adamson 1742a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1743328ead28SJ. Bruce Fields { 1744328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1745328ead28SJ. Bruce Fields 1746328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1747a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1748328ead28SJ. Bruce Fields return c; 1749328ead28SJ. Bruce Fields } 1750328ead28SJ. Bruce Fields } 1751328ead28SJ. Bruce Fields return NULL; 1752328ead28SJ. Bruce Fields } 1753328ead28SJ. Bruce Fields 1754a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1755328ead28SJ. Bruce Fields { 1756328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1757a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 175821b75b01SJ. Bruce Fields int ret; 1759328ead28SJ. Bruce Fields 1760328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1761a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1762328ead28SJ. Bruce Fields if (c) { 1763328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1764328ead28SJ. Bruce Fields free_conn(new); 1765328ead28SJ. Bruce Fields return; 1766328ead28SJ. Bruce Fields } 1767328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1768328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 176921b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 177021b75b01SJ. Bruce Fields if (ret) 177121b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 177221b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1773328ead28SJ. Bruce Fields return; 1774328ead28SJ. Bruce Fields } 1775328ead28SJ. Bruce Fields 1776868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1777868b89c3SMi Jinlong { 1778868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1779868b89c3SMi Jinlong 1780868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1781868b89c3SMi Jinlong } 1782868b89c3SMi Jinlong 1783ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1784ae82a8d0SMi Jinlong struct nfsd4_session *session) 1785ae82a8d0SMi Jinlong { 1786ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1787ae82a8d0SMi Jinlong 1788ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1789ae82a8d0SMi Jinlong } 1790ae82a8d0SMi Jinlong 1791069b6ad4SAndy Adamson __be32 1792b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1793069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1794069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1795069b6ad4SAndy Adamson { 1796f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1797b85d4c01SBenny Halevy struct nfsd4_session *session; 1798b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1799a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1800b85d4c01SBenny Halevy int status; 1801b85d4c01SBenny Halevy 1802f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1803f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1804f9bb94c4SAndy Adamson 1805a663bdd8SJ. Bruce Fields /* 1806a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1807a663bdd8SJ. Bruce Fields * below. 1808a663bdd8SJ. Bruce Fields */ 1809a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1810a663bdd8SJ. Bruce Fields if (!conn) 1811a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1812a663bdd8SJ. Bruce Fields 18139089f1b4SBenny Halevy spin_lock(&client_lock); 1814b85d4c01SBenny Halevy status = nfserr_badsession; 1815b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1816b85d4c01SBenny Halevy if (!session) 1817b85d4c01SBenny Halevy goto out; 1818b85d4c01SBenny Halevy 1819868b89c3SMi Jinlong status = nfserr_too_many_ops; 1820868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1821868b89c3SMi Jinlong goto out; 1822868b89c3SMi Jinlong 1823ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1824ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1825ae82a8d0SMi Jinlong goto out; 1826ae82a8d0SMi Jinlong 1827b85d4c01SBenny Halevy status = nfserr_badslot; 18286c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1829b85d4c01SBenny Halevy goto out; 1830b85d4c01SBenny Halevy 1831557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1832b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1833b85d4c01SBenny Halevy 1834a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1835a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1836a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1837a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1838a8dfdaebSAndy Adamson 183988e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1840b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1841b85d4c01SBenny Halevy cstate->slot = slot; 1842b85d4c01SBenny Halevy cstate->session = session; 1843da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1844557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1845bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1846da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1847aaf84eb9SBenny Halevy goto out; 1848b85d4c01SBenny Halevy } 1849b85d4c01SBenny Halevy if (status) 1850b85d4c01SBenny Halevy goto out; 1851b85d4c01SBenny Halevy 1852a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1853a663bdd8SJ. Bruce Fields conn = NULL; 1854328ead28SJ. Bruce Fields 1855b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1856b85d4c01SBenny Halevy slot->sl_inuse = true; 1857b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1858557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1859b85d4c01SBenny Halevy 1860b85d4c01SBenny Halevy cstate->slot = slot; 1861b85d4c01SBenny Halevy cstate->session = session; 1862b85d4c01SBenny Halevy 1863b85d4c01SBenny Halevy out: 186426c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1865aaf84eb9SBenny Halevy if (cstate->session) { 18660d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 18670d7bb719SJ. Bruce Fields 186836acb66bSBenny Halevy nfsd4_get_session(cstate->session); 18690d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 18700d7bb719SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_DOWN) 18710d7bb719SJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; 1872aaf84eb9SBenny Halevy } 1873a663bdd8SJ. Bruce Fields kfree(conn); 187436acb66bSBenny Halevy spin_unlock(&client_lock); 1875b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1876b85d4c01SBenny Halevy return status; 1877069b6ad4SAndy Adamson } 1878069b6ad4SAndy Adamson 1879069b6ad4SAndy Adamson __be32 18804dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 18814dc6ec00SJ. Bruce Fields { 1882bcecf1ccSMi Jinlong int status = 0; 1883bcecf1ccSMi Jinlong 18844dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 18854dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 18864dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 18874dc6ec00SJ. Bruce Fields /* 18884dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 18894dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 18904dc6ec00SJ. Bruce Fields */ 18914dc6ec00SJ. Bruce Fields return nfs_ok; 18924dc6ec00SJ. Bruce Fields } 1893bcecf1ccSMi Jinlong 18944dc6ec00SJ. Bruce Fields nfs4_lock_state(); 1895bcecf1ccSMi Jinlong status = nfserr_complete_already; 1896bcecf1ccSMi Jinlong if (cstate->session->se_client->cl_firststate) 1897bcecf1ccSMi Jinlong goto out; 1898bcecf1ccSMi Jinlong 1899bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 1900bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 19014dc6ec00SJ. Bruce Fields /* 19024dc6ec00SJ. Bruce Fields * The following error isn't really legal. 19034dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 19044dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 19054dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 19064dc6ec00SJ. Bruce Fields * client. 19074dc6ec00SJ. Bruce Fields */ 1908bcecf1ccSMi Jinlong goto out; 1909bcecf1ccSMi Jinlong 1910bcecf1ccSMi Jinlong status = nfs_ok; 19114dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 1912bcecf1ccSMi Jinlong out: 19134dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 1914bcecf1ccSMi Jinlong return status; 19154dc6ec00SJ. Bruce Fields } 19164dc6ec00SJ. Bruce Fields 19174dc6ec00SJ. Bruce Fields __be32 1918b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1919b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 19201da177e4SLinus Torvalds { 19211da177e4SLinus Torvalds struct xdr_netobj clname = { 19221da177e4SLinus Torvalds .len = setclid->se_namelen, 19231da177e4SLinus Torvalds .data = setclid->se_name, 19241da177e4SLinus Torvalds }; 19251da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 19261da177e4SLinus Torvalds unsigned int strhashval; 192728ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1928b37ad28bSAl Viro __be32 status; 1929a55370a3SNeilBrown char dname[HEXDIR_LEN]; 19301da177e4SLinus Torvalds 19311da177e4SLinus Torvalds if (!check_name(clname)) 193273aea4ecSNeil Brown return nfserr_inval; 19331da177e4SLinus Torvalds 1934a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1935a55370a3SNeilBrown if (status) 193673aea4ecSNeil Brown return status; 1937a55370a3SNeilBrown 19381da177e4SLinus Torvalds /* 19391da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19401da177e4SLinus Torvalds * We get here on a DRC miss. 19411da177e4SLinus Torvalds */ 19421da177e4SLinus Torvalds 1943a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 19441da177e4SLinus Torvalds 19451da177e4SLinus Torvalds nfs4_lock_state(); 1946e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 194728ce6054SNeilBrown if (conf) { 1948a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 19491da177e4SLinus Torvalds status = nfserr_clid_inuse; 1950e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 1951e203d506SJ. Bruce Fields goto out; 1952026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1953363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1954363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1955363168b4SJeff Layton sizeof(addr_str)); 1956026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1957363168b4SJeff Layton "at %s\n", addr_str); 19581da177e4SLinus Torvalds goto out; 19591da177e4SLinus Torvalds } 19601da177e4SLinus Torvalds } 1961a186e767SJ. Bruce Fields /* 1962a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1963a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1964a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1965a186e767SJ. Bruce Fields */ 1966e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 19673e772463SJ. Bruce Fields status = nfserr_jukebox; 19681da177e4SLinus Torvalds if (!conf) { 19691da177e4SLinus Torvalds /* 1970a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1971a186e767SJ. Bruce Fields * placed first, because it is the normal case 19721da177e4SLinus Torvalds */ 19731da177e4SLinus Torvalds if (unconf) 19741da177e4SLinus Torvalds expire_client(unconf); 1975b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1976a55370a3SNeilBrown if (new == NULL) 19771da177e4SLinus Torvalds goto out; 19781da177e4SLinus Torvalds gen_clid(new); 1979599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 19801da177e4SLinus Torvalds /* 1981a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1982a186e767SJ. Bruce Fields * probable callback update 19831da177e4SLinus Torvalds */ 198431f4a6c1SNeilBrown if (unconf) { 198531f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 198631f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 198731f4a6c1SNeilBrown * This has the advantage that there is at most 198831f4a6c1SNeilBrown * one {*x***} in either list at any time. 198931f4a6c1SNeilBrown */ 19901da177e4SLinus Torvalds expire_client(unconf); 19911da177e4SLinus Torvalds } 1992b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1993a55370a3SNeilBrown if (new == NULL) 19941da177e4SLinus Torvalds goto out; 19951da177e4SLinus Torvalds copy_clid(new, conf); 19961da177e4SLinus Torvalds } else if (!unconf) { 19971da177e4SLinus Torvalds /* 1998a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1999a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2000a186e767SJ. Bruce Fields * confirmed. 20011da177e4SLinus Torvalds */ 2002b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2003a55370a3SNeilBrown if (new == NULL) 20041da177e4SLinus Torvalds goto out; 20051da177e4SLinus Torvalds gen_clid(new); 200649ba8781SJ. Bruce Fields } else { 20071da177e4SLinus Torvalds /* 2008a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2009a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2010a186e767SJ. Bruce Fields * confirmed. 20111da177e4SLinus Torvalds */ 20121da177e4SLinus Torvalds expire_client(unconf); 2013b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2014a55370a3SNeilBrown if (new == NULL) 20151da177e4SLinus Torvalds goto out; 20161da177e4SLinus Torvalds gen_clid(new); 20171da177e4SLinus Torvalds } 20188323c3b2SJ. Bruce Fields /* 20198323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 20208323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 20218323c3b2SJ. Bruce Fields */ 20228323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 20236f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2024c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 20251da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 20261da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 20271da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 20281da177e4SLinus Torvalds status = nfs_ok; 20291da177e4SLinus Torvalds out: 20301da177e4SLinus Torvalds nfs4_unlock_state(); 20311da177e4SLinus Torvalds return status; 20321da177e4SLinus Torvalds } 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds 20351da177e4SLinus Torvalds /* 2036a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2037a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2038a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 20391da177e4SLinus Torvalds */ 2040b37ad28bSAl Viro __be32 2041b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2042b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2043b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 20441da177e4SLinus Torvalds { 2045363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 204621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 20471da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 20481da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2049b37ad28bSAl Viro __be32 status; 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 20521da177e4SLinus Torvalds return nfserr_stale_clientid; 20531da177e4SLinus Torvalds /* 20541da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 20551da177e4SLinus Torvalds * We get here on a DRC miss. 20561da177e4SLinus Torvalds */ 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds nfs4_lock_state(); 205921ab45a4SNeilBrown 206021ab45a4SNeilBrown conf = find_confirmed_client(clid); 206121ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 206221ab45a4SNeilBrown 206322de4d83SNeilBrown status = nfserr_clid_inuse; 2064363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 20651da177e4SLinus Torvalds goto out; 2066363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 20671da177e4SLinus Torvalds goto out; 206821ab45a4SNeilBrown 2069a186e767SJ. Bruce Fields /* 2070a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2071a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2072a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2073a186e767SJ. Bruce Fields */ 2074366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2075a186e767SJ. Bruce Fields /* 2076a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2077a186e767SJ. Bruce Fields * callback update 20787c79f737SNeilBrown */ 2079599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 20801da177e4SLinus Torvalds status = nfserr_clid_inuse; 20811da177e4SLinus Torvalds else { 20825a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 20835a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 20841a69c179SNeilBrown expire_client(unconf); 20851da177e4SLinus Torvalds status = nfs_ok; 20861a69c179SNeilBrown 20871da177e4SLinus Torvalds } 2088f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2089a186e767SJ. Bruce Fields /* 2090a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2091a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2092a186e767SJ. Bruce Fields * do nothing. 20937c79f737SNeilBrown */ 2094599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 20951da177e4SLinus Torvalds status = nfserr_clid_inuse; 209621ab45a4SNeilBrown else 20971da177e4SLinus Torvalds status = nfs_ok; 20987c79f737SNeilBrown } else if (!conf && unconf 2099599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2100a186e767SJ. Bruce Fields /* 2101a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2102a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 21031da177e4SLinus Torvalds */ 2104599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 21051da177e4SLinus Torvalds status = nfserr_clid_inuse; 21061da177e4SLinus Torvalds } else { 21071a69c179SNeilBrown unsigned int hash = 21081a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 21091a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2110e203d506SJ. Bruce Fields hash); 21111a69c179SNeilBrown if (conf) { 2112c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 21131a69c179SNeilBrown expire_client(conf); 21141a69c179SNeilBrown } 21151da177e4SLinus Torvalds move_to_confirmed(unconf); 211621ab45a4SNeilBrown conf = unconf; 21175a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 21181a69c179SNeilBrown status = nfs_ok; 21191da177e4SLinus Torvalds } 2120599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2121599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 21227c79f737SNeilBrown &confirm)))) { 2123a186e767SJ. Bruce Fields /* 2124a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2125a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 21261da177e4SLinus Torvalds */ 21271da177e4SLinus Torvalds status = nfserr_stale_clientid; 21287c79f737SNeilBrown } else { 21291da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 213022de4d83SNeilBrown status = nfserr_clid_inuse; 213108e8987cSNeilBrown } 21321da177e4SLinus Torvalds out: 21331da177e4SLinus Torvalds nfs4_unlock_state(); 21341da177e4SLinus Torvalds return status; 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds /* OPEN Share state helper functions */ 21381da177e4SLinus Torvalds static inline struct nfs4_file * 21391da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 21401da177e4SLinus Torvalds { 21411da177e4SLinus Torvalds struct nfs4_file *fp; 21421da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 21431da177e4SLinus Torvalds 2144e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 2145e60d4398SNeilBrown if (fp) { 21468b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 21471da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 21488beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 21498beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 21501da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 21511da177e4SLinus Torvalds fp->fi_id = current_fileid++; 215247f9940cSMeelap Shah fp->fi_had_conflict = false; 2153acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2154f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2155f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 215647cee541SPavel Emelyanov spin_lock(&recall_lock); 215747cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 215847cee541SPavel Emelyanov spin_unlock(&recall_lock); 21591da177e4SLinus Torvalds return fp; 21601da177e4SLinus Torvalds } 21611da177e4SLinus Torvalds return NULL; 21621da177e4SLinus Torvalds } 21631da177e4SLinus Torvalds 21641da177e4SLinus Torvalds static void 2165e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2166e60d4398SNeilBrown { 2167e60d4398SNeilBrown if (*slab == NULL) 2168e60d4398SNeilBrown return; 21691a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2170e60d4398SNeilBrown *slab = NULL; 2171e60d4398SNeilBrown } 2172e60d4398SNeilBrown 2173e8ff2a84SJ. Bruce Fields void 2174e60d4398SNeilBrown nfsd4_free_slabs(void) 2175e60d4398SNeilBrown { 2176e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 2177e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 21785ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 21795b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2180e60d4398SNeilBrown } 21811da177e4SLinus Torvalds 21821da177e4SLinus Torvalds static int 21831da177e4SLinus Torvalds nfsd4_init_slabs(void) 21841da177e4SLinus Torvalds { 21851da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 218620c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 2187e60d4398SNeilBrown if (stateowner_slab == NULL) 2188e60d4398SNeilBrown goto out_nomem; 2189e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 219020c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2191e60d4398SNeilBrown if (file_slab == NULL) 2192e60d4398SNeilBrown goto out_nomem; 21935ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 219420c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 21955ac049acSNeilBrown if (stateid_slab == NULL) 21965ac049acSNeilBrown goto out_nomem; 21975b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 219820c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 21995b2d21c1SNeilBrown if (deleg_slab == NULL) 22005b2d21c1SNeilBrown goto out_nomem; 2201e60d4398SNeilBrown return 0; 2202e60d4398SNeilBrown out_nomem: 2203e60d4398SNeilBrown nfsd4_free_slabs(); 22041da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 22051da177e4SLinus Torvalds return -ENOMEM; 22061da177e4SLinus Torvalds } 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds void 22091da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 22101da177e4SLinus Torvalds { 22111da177e4SLinus Torvalds struct nfs4_stateowner *sop = 22121da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 22131da177e4SLinus Torvalds kfree(sop->so_owner.data); 22141da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 22151da177e4SLinus Torvalds } 22161da177e4SLinus Torvalds 2217ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2218ff194bd9SJ. Bruce Fields { 2219ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2220ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2221ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2222ff194bd9SJ. Bruce Fields } 2223ff194bd9SJ. Bruce Fields 2224ff194bd9SJ. Bruce Fields static inline struct nfs4_stateowner *alloc_stateowner(struct xdr_netobj *owner, struct nfs4_client *clp) 22251da177e4SLinus Torvalds { 22261da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22271da177e4SLinus Torvalds 2228ff194bd9SJ. Bruce Fields sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL); 2229ff194bd9SJ. Bruce Fields if (!sop) 2230ff194bd9SJ. Bruce Fields return NULL; 2231ff194bd9SJ. Bruce Fields 2232ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2233ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2234ff194bd9SJ. Bruce Fields kmem_cache_free(stateowner_slab, sop); 2235ff194bd9SJ. Bruce Fields return NULL; 2236ff194bd9SJ. Bruce Fields } 22371da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2238ff194bd9SJ. Bruce Fields 22391da177e4SLinus Torvalds kref_init(&sop->so_ref); 2240ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_perclient); 2241ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2242ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_perstateid); 2243ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_close_lru); 2244ff194bd9SJ. Bruce Fields sop->so_id = current_ownerid++; 2245ff194bd9SJ. Bruce Fields sop->so_time = 0; 2246ff194bd9SJ. Bruce Fields sop->so_client = clp; 2247ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 22481da177e4SLinus Torvalds return sop; 22491da177e4SLinus Torvalds } 2250ff194bd9SJ. Bruce Fields 2251ff194bd9SJ. Bruce Fields static void hash_openowner(struct nfs4_stateowner *sop, struct nfs4_client *clp, unsigned int strhashval) 2252ff194bd9SJ. Bruce Fields { 2253ff194bd9SJ. Bruce Fields unsigned int idhashval; 2254ff194bd9SJ. Bruce Fields 2255ff194bd9SJ. Bruce Fields idhashval = open_ownerid_hashval(sop->so_id); 2256ff194bd9SJ. Bruce Fields list_add(&sop->so_idhash, &open_ownerid_hashtbl[idhashval]); 2257ff194bd9SJ. Bruce Fields list_add(&sop->so_strhash, &open_ownerstr_hashtbl[strhashval]); 2258ff194bd9SJ. Bruce Fields list_add(&sop->so_perclient, &clp->cl_openowners); 22591da177e4SLinus Torvalds } 22601da177e4SLinus Torvalds 22611da177e4SLinus Torvalds static struct nfs4_stateowner * 22621da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 22631da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22641da177e4SLinus Torvalds 2265ff194bd9SJ. Bruce Fields sop = alloc_stateowner(&open->op_owner, clp); 2266ff194bd9SJ. Bruce Fields if (!sop) 22671da177e4SLinus Torvalds return NULL; 22681da177e4SLinus Torvalds sop->so_is_open_owner = 1; 22691da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 22701da177e4SLinus Torvalds sop->so_confirmed = 0; 2271ff194bd9SJ. Bruce Fields hash_openowner(sop, clp, strhashval); 22721da177e4SLinus Torvalds return sop; 22731da177e4SLinus Torvalds } 22741da177e4SLinus Torvalds 22751da177e4SLinus Torvalds static inline void 22761da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 22771da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 22781da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 22791da177e4SLinus Torvalds 22801da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2281ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2282ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 22831da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 22841da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2285ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 22868beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 22875fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_OPEN_STID; 22881da177e4SLinus Torvalds stp->st_stateowner = sop; 228913cd2184SNeilBrown get_nfs4_file(fp); 22901da177e4SLinus Torvalds stp->st_file = fp; 2291e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 22921da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 22931da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 229473997dc4SJ. Bruce Fields /* note will be incremented before first return to client: */ 22951da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 22961da177e4SLinus Torvalds stp->st_access_bmap = 0; 22971da177e4SLinus Torvalds stp->st_deny_bmap = 0; 229884459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 229984459a11SAndy Adamson &stp->st_access_bmap); 23001da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 23014c4cd222SNeilBrown stp->st_openstp = NULL; 23021da177e4SLinus Torvalds } 23031da177e4SLinus Torvalds 23041da177e4SLinus Torvalds static void 23051da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 23061da177e4SLinus Torvalds { 23071da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 23081da177e4SLinus Torvalds 2309358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 23101da177e4SLinus Torvalds sop->so_time = get_seconds(); 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds 23131da177e4SLinus Torvalds static int 2314599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2315599e0a22SJ. Bruce Fields clientid_t *clid) 2316599e0a22SJ. Bruce Fields { 2317599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2318599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2319599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 23201da177e4SLinus Torvalds } 23211da177e4SLinus Torvalds 23221da177e4SLinus Torvalds static struct nfs4_stateowner * 23231da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 23241da177e4SLinus Torvalds { 23251da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 23261da177e4SLinus Torvalds 2327506f275fSJ. Bruce Fields list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { 2328599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 23291da177e4SLinus Torvalds return so; 23301da177e4SLinus Torvalds } 23311da177e4SLinus Torvalds return NULL; 23321da177e4SLinus Torvalds } 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 23351da177e4SLinus Torvalds static struct nfs4_file * 23361da177e4SLinus Torvalds find_file(struct inode *ino) 23371da177e4SLinus Torvalds { 23381da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23391da177e4SLinus Torvalds struct nfs4_file *fp; 23401da177e4SLinus Torvalds 23418b671b80SJ. Bruce Fields spin_lock(&recall_lock); 23421da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 234313cd2184SNeilBrown if (fp->fi_inode == ino) { 234413cd2184SNeilBrown get_nfs4_file(fp); 23458b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23461da177e4SLinus Torvalds return fp; 23471da177e4SLinus Torvalds } 234813cd2184SNeilBrown } 23498b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23501da177e4SLinus Torvalds return NULL; 23511da177e4SLinus Torvalds } 23521da177e4SLinus Torvalds 2353d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2354ba5a6a19SJ. Bruce Fields { 2355d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 23568838dc43SJ. Bruce Fields return 0; 2357d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2358d87a8adeSAndy Adamson return 0; 2359d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2360d87a8adeSAndy Adamson if (minorversion && x) { 2361d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2362d87a8adeSAndy Adamson return 0; 2363d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2364d87a8adeSAndy Adamson return 0; 2365d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2366d87a8adeSAndy Adamson } 2367d87a8adeSAndy Adamson if (x) 23688838dc43SJ. Bruce Fields return 0; 23698838dc43SJ. Bruce Fields return 1; 2370ba5a6a19SJ. Bruce Fields } 2371ba5a6a19SJ. Bruce Fields 23728838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2373ba5a6a19SJ. Bruce Fields { 23748838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 23758838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2376ba5a6a19SJ. Bruce Fields } 23771da177e4SLinus Torvalds 23784f83aa30SJ. Bruce Fields /* 23791da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 23801da177e4SLinus Torvalds * WRITE with all zero or all one stateid 23811da177e4SLinus Torvalds */ 2382b37ad28bSAl Viro static __be32 23831da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 23841da177e4SLinus Torvalds { 23851da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 23861da177e4SLinus Torvalds struct nfs4_file *fp; 23871da177e4SLinus Torvalds struct nfs4_stateid *stp; 2388b37ad28bSAl Viro __be32 ret; 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 23911da177e4SLinus Torvalds 23921da177e4SLinus Torvalds fp = find_file(ino); 239313cd2184SNeilBrown if (!fp) 239413cd2184SNeilBrown return nfs_ok; 2395b700949bSNeilBrown ret = nfserr_locked; 23961da177e4SLinus Torvalds /* Search for conflicting share reservations */ 23978beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 23981da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 23991da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 240013cd2184SNeilBrown goto out; 24011da177e4SLinus Torvalds } 240213cd2184SNeilBrown ret = nfs_ok; 240313cd2184SNeilBrown out: 240413cd2184SNeilBrown put_nfs4_file(fp); 240513cd2184SNeilBrown return ret; 24061da177e4SLinus Torvalds } 24071da177e4SLinus Torvalds 24086b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 24091da177e4SLinus Torvalds { 24101da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 24111da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 24121da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 24131da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 24141da177e4SLinus Torvalds * it's safe to take a reference: */ 24151da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 24181da177e4SLinus Torvalds 2419460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 24201da177e4SLinus Torvalds dp->dl_time = get_seconds(); 24211da177e4SLinus Torvalds 24226b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 24236b57d9c8SJ. Bruce Fields } 24246b57d9c8SJ. Bruce Fields 2425acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 24266b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 24276b57d9c8SJ. Bruce Fields { 2428acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2429acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 24306b57d9c8SJ. Bruce Fields 2431acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2432acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2433acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 24340272e1fdSJ. Bruce Fields /* 24350272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2436acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 24376b57d9c8SJ. Bruce Fields * in time: 24380272e1fdSJ. Bruce Fields */ 24390272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 24401da177e4SLinus Torvalds 24415d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2442acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2443acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 24445d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 24455d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 24481da177e4SLinus Torvalds static 24491da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 24501da177e4SLinus Torvalds { 24511da177e4SLinus Torvalds if (arg & F_UNLCK) 24521da177e4SLinus Torvalds return lease_modify(onlist, arg); 24531da177e4SLinus Torvalds else 24541da177e4SLinus Torvalds return -EAGAIN; 24551da177e4SLinus Torvalds } 24561da177e4SLinus Torvalds 24577b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 24588fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 24598fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 24601da177e4SLinus Torvalds }; 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds 2463b37ad28bSAl Viro __be32 24646668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 24656668958fSAndy Adamson struct nfsd4_open *open) 24661da177e4SLinus Torvalds { 24671da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 24681da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 24691da177e4SLinus Torvalds unsigned int strhashval; 24701da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds if (!check_name(open->op_owner)) 24730f442aa2SJ. Bruce Fields return nfserr_inval; 24741da177e4SLinus Torvalds 24751da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 24761da177e4SLinus Torvalds return nfserr_stale_clientid; 24771da177e4SLinus Torvalds 2478506f275fSJ. Bruce Fields strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); 24791da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 24801da177e4SLinus Torvalds open->op_stateowner = sop; 24810f442aa2SJ. Bruce Fields if (!sop) { 24820f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 24830f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 24840f442aa2SJ. Bruce Fields if (clp == NULL) 24850f442aa2SJ. Bruce Fields return nfserr_expired; 24860f442aa2SJ. Bruce Fields goto renew; 24870f442aa2SJ. Bruce Fields } 24886668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 24896668958fSAndy Adamson if (nfsd4_has_session(cstate)) 24906668958fSAndy Adamson goto renew; 2491ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 24920f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2493ae8b6253SJ. Bruce Fields clp = sop->so_client; 2494f044ff83SJ. Bruce Fields release_openowner(sop); 24950f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2496ae8b6253SJ. Bruce Fields goto renew; 24970f442aa2SJ. Bruce Fields } 24980f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 24991da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2500a90b061cSAl Viro return nfserr_replay_me; 25011da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 25021da177e4SLinus Torvalds * that we don't even have replay data saved! 25031da177e4SLinus Torvalds * Therefore, we have no choice but to continue 25041da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 25051da177e4SLinus Torvalds * fail again for the same reason. 25061da177e4SLinus Torvalds */ 25070f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 25081da177e4SLinus Torvalds goto renew; 25091da177e4SLinus Torvalds } 25100f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 25110f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 25120f442aa2SJ. Bruce Fields renew: 25130f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 25141da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 25151da177e4SLinus Torvalds if (sop == NULL) 25163e772463SJ. Bruce Fields return nfserr_jukebox; 25171da177e4SLinus Torvalds open->op_stateowner = sop; 25180f442aa2SJ. Bruce Fields } 25190f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 25201da177e4SLinus Torvalds renew_client(sop->so_client); 25210f442aa2SJ. Bruce Fields return nfs_ok; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds 2524b37ad28bSAl Viro static inline __be32 25254a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 25264a6e43e6SNeilBrown { 25274a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 25284a6e43e6SNeilBrown return nfserr_openmode; 25294a6e43e6SNeilBrown else 25304a6e43e6SNeilBrown return nfs_ok; 25314a6e43e6SNeilBrown } 25324a6e43e6SNeilBrown 253352f4fb43SNeilBrown static struct nfs4_delegation * 253452f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 253552f4fb43SNeilBrown { 253632b007b4SJ. Bruce Fields struct nfs4_delegation *dp; 253752f4fb43SNeilBrown 2538acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 253932b007b4SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 254032b007b4SJ. Bruce Fields if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { 2541acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2542acfdf5c3SJ. Bruce Fields return dp; 254352f4fb43SNeilBrown } 254432b007b4SJ. Bruce Fields spin_unlock(&recall_lock); 254532b007b4SJ. Bruce Fields return NULL; 254632b007b4SJ. Bruce Fields } 254752f4fb43SNeilBrown 2548c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 254924a0111eSJ. Bruce Fields { 255024a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 255124a0111eSJ. Bruce Fields 255224a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 255324a0111eSJ. Bruce Fields } 255424a0111eSJ. Bruce Fields 2555b37ad28bSAl Viro static __be32 2556567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2557567d9829SNeilBrown struct nfs4_delegation **dp) 2558567d9829SNeilBrown { 2559567d9829SNeilBrown int flags; 2560b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2561567d9829SNeilBrown 2562567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2563567d9829SNeilBrown if (*dp == NULL) 2564c44c5eebSNeilBrown goto out; 256524a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2566567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2567567d9829SNeilBrown if (status) 2568567d9829SNeilBrown *dp = NULL; 2569c44c5eebSNeilBrown out: 2570c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2571c44c5eebSNeilBrown return nfs_ok; 2572c44c5eebSNeilBrown if (status) 2573c44c5eebSNeilBrown return status; 2574c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2575c44c5eebSNeilBrown return nfs_ok; 2576567d9829SNeilBrown } 2577567d9829SNeilBrown 2578b37ad28bSAl Viro static __be32 25791da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 25801da177e4SLinus Torvalds { 25811da177e4SLinus Torvalds struct nfs4_stateid *local; 2582b37ad28bSAl Viro __be32 status = nfserr_share_denied; 25831da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 25841da177e4SLinus Torvalds 25858beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 25861da177e4SLinus Torvalds /* ignore lock owners */ 25871da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 25881da177e4SLinus Torvalds continue; 25891da177e4SLinus Torvalds /* remember if we have seen this open owner */ 25901da177e4SLinus Torvalds if (local->st_stateowner == sop) 25911da177e4SLinus Torvalds *stpp = local; 25921da177e4SLinus Torvalds /* check for conflicting share reservations */ 25931da177e4SLinus Torvalds if (!test_share(local, open)) 25941da177e4SLinus Torvalds goto out; 25951da177e4SLinus Torvalds } 25961da177e4SLinus Torvalds status = 0; 25971da177e4SLinus Torvalds out: 25981da177e4SLinus Torvalds return status; 25991da177e4SLinus Torvalds } 26001da177e4SLinus Torvalds 26015ac049acSNeilBrown static inline struct nfs4_stateid * 26025ac049acSNeilBrown nfs4_alloc_stateid(void) 26035ac049acSNeilBrown { 26045ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 26055ac049acSNeilBrown } 26065ac049acSNeilBrown 260721fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 260821fb4016SJ. Bruce Fields { 260921fb4016SJ. Bruce Fields int flags = 0; 261021fb4016SJ. Bruce Fields 261121fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 261221fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 261321fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 261421fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 261521fb4016SJ. Bruce Fields return flags; 261621fb4016SJ. Bruce Fields } 261721fb4016SJ. Bruce Fields 26180c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 26190c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2620f9d7562fSJ. Bruce Fields { 2621f9d7562fSJ. Bruce Fields __be32 status; 26220c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 26230c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 26240c12eaffSCasey Bodley 26250c12eaffSCasey Bodley /* CLAIM_DELEGATE_CUR is used in response to a broken lease; 26260c12eaffSCasey Bodley * allowing it to break the lease and return EAGAIN leaves the 26270c12eaffSCasey Bodley * client unable to make progress in returning the delegation */ 26280c12eaffSCasey Bodley if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 26290c12eaffSCasey Bodley access |= NFSD_MAY_NOT_BREAK_LEASE; 2630f9d7562fSJ. Bruce Fields 2631f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2632f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2633f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2634f9d7562fSJ. Bruce Fields if (status) 2635f9d7562fSJ. Bruce Fields return status; 2636f9d7562fSJ. Bruce Fields } 2637f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2638f9d7562fSJ. Bruce Fields 2639f9d7562fSJ. Bruce Fields return nfs_ok; 2640f9d7562fSJ. Bruce Fields } 2641f9d7562fSJ. Bruce Fields 2642b37ad28bSAl Viro static __be32 26431da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2644f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2645f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 26461da177e4SLinus Torvalds { 26471da177e4SLinus Torvalds struct nfs4_stateid *stp; 2648f9d7562fSJ. Bruce Fields __be32 status; 26491da177e4SLinus Torvalds 26505ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26511da177e4SLinus Torvalds if (stp == NULL) 26523e772463SJ. Bruce Fields return nfserr_jukebox; 26531da177e4SLinus Torvalds 26540c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 26551da177e4SLinus Torvalds if (status) { 26565ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 26571da177e4SLinus Torvalds return status; 26581da177e4SLinus Torvalds } 26591da177e4SLinus Torvalds *stpp = stp; 26601da177e4SLinus Torvalds return 0; 26611da177e4SLinus Torvalds } 26621da177e4SLinus Torvalds 2663b37ad28bSAl Viro static inline __be32 26641da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 26651da177e4SLinus Torvalds struct nfsd4_open *open) 26661da177e4SLinus Torvalds { 26671da177e4SLinus Torvalds struct iattr iattr = { 26681da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 26691da177e4SLinus Torvalds .ia_size = 0, 26701da177e4SLinus Torvalds }; 26711da177e4SLinus Torvalds if (!open->op_truncate) 26721da177e4SLinus Torvalds return 0; 26731da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 26749246585aSAl Viro return nfserr_inval; 26751da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 26761da177e4SLinus Torvalds } 26771da177e4SLinus Torvalds 2678b37ad28bSAl Viro static __be32 2679f9d7562fSJ. Bruce Fields nfs4_upgrade_open(struct svc_rqst *rqstp, struct nfs4_file *fp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 26801da177e4SLinus Torvalds { 26817d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 26827d947842SJ. Bruce Fields bool new_access; 2683b37ad28bSAl Viro __be32 status; 26841da177e4SLinus Torvalds 26857d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2686f9d7562fSJ. Bruce Fields if (new_access) { 26870c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2688f9d7562fSJ. Bruce Fields if (status) 2689f9d7562fSJ. Bruce Fields return status; 26906c26d08fSJ. Bruce Fields } 26911da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 26921da177e4SLinus Torvalds if (status) { 2693f9d7562fSJ. Bruce Fields if (new_access) { 2694f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2695f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2696f9d7562fSJ. Bruce Fields } 26971da177e4SLinus Torvalds return status; 26981da177e4SLinus Torvalds } 26991da177e4SLinus Torvalds /* remember the open */ 270024a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2701b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27021da177e4SLinus Torvalds 27031da177e4SLinus Torvalds return nfs_ok; 27041da177e4SLinus Torvalds } 27051da177e4SLinus Torvalds 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds static void 270837515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 27091da177e4SLinus Torvalds { 27101da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2711c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 27121da177e4SLinus Torvalds } 27131da177e4SLinus Torvalds 271414a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 271514a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 271614a24e99SJ. Bruce Fields { 271714a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 271814a24e99SJ. Bruce Fields return true; 271914a24e99SJ. Bruce Fields /* 272014a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 272114a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 272214a24e99SJ. Bruce Fields * until we hear otherwise: 272314a24e99SJ. Bruce Fields */ 272414a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 272514a24e99SJ. Bruce Fields } 272614a24e99SJ. Bruce Fields 272722d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 272822d38c4cSJ. Bruce Fields { 272922d38c4cSJ. Bruce Fields struct file_lock *fl; 273022d38c4cSJ. Bruce Fields 273122d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 273222d38c4cSJ. Bruce Fields if (!fl) 273322d38c4cSJ. Bruce Fields return NULL; 273422d38c4cSJ. Bruce Fields locks_init_lock(fl); 273522d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 273622d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 273722d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 273822d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2739acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 274022d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 274122d38c4cSJ. Bruce Fields return fl; 274222d38c4cSJ. Bruce Fields } 274322d38c4cSJ. Bruce Fields 2744edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2745edab9782SJ. Bruce Fields { 2746acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2747edab9782SJ. Bruce Fields struct file_lock *fl; 2748edab9782SJ. Bruce Fields int status; 2749edab9782SJ. Bruce Fields 2750edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2751edab9782SJ. Bruce Fields if (!fl) 2752edab9782SJ. Bruce Fields return -ENOMEM; 2753acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 2754acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2755acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2756edab9782SJ. Bruce Fields if (status) { 2757acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2758edab9782SJ. Bruce Fields locks_free_lock(fl); 2759edab9782SJ. Bruce Fields return -ENOMEM; 2760edab9782SJ. Bruce Fields } 2761acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2762acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2763acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2764acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2765acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2766acfdf5c3SJ. Bruce Fields return 0; 2767acfdf5c3SJ. Bruce Fields } 2768acfdf5c3SJ. Bruce Fields 2769acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2770acfdf5c3SJ. Bruce Fields { 2771acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2772acfdf5c3SJ. Bruce Fields 2773acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2774acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2775acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2776acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2777acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2778acfdf5c3SJ. Bruce Fields return -EAGAIN; 2779acfdf5c3SJ. Bruce Fields } 2780acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2781acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2782acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2783acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2784edab9782SJ. Bruce Fields return 0; 2785edab9782SJ. Bruce Fields } 2786edab9782SJ. Bruce Fields 27871da177e4SLinus Torvalds /* 27881da177e4SLinus Torvalds * Attempt to hand out a delegation. 27891da177e4SLinus Torvalds */ 27901da177e4SLinus Torvalds static void 27911da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 27921da177e4SLinus Torvalds { 27931da177e4SLinus Torvalds struct nfs4_delegation *dp; 27941da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 279514a24e99SJ. Bruce Fields int cb_up; 27961da177e4SLinus Torvalds int status, flag = 0; 27971da177e4SLinus Torvalds 279814a24e99SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(sop->so_client); 27991da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28007b190fecSNeilBrown open->op_recall = 0; 28017b190fecSNeilBrown switch (open->op_claim_type) { 28027b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28032bf23875SJ. Bruce Fields if (!cb_up) 28047b190fecSNeilBrown open->op_recall = 1; 28057b190fecSNeilBrown flag = open->op_delegate_type; 28067b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28071da177e4SLinus Torvalds goto out; 28087b190fecSNeilBrown break; 28097b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28107b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28117b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2812af558e33SJ. Bruce Fields if (locks_in_grace()) 28137b190fecSNeilBrown goto out; 28142bf23875SJ. Bruce Fields if (!cb_up || !sop->so_confirmed) 28157b190fecSNeilBrown goto out; 28161da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28171da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28181da177e4SLinus Torvalds else 28191da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28207b190fecSNeilBrown break; 28217b190fecSNeilBrown default: 28227b190fecSNeilBrown goto out; 28237b190fecSNeilBrown } 28241da177e4SLinus Torvalds 28251da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 2826dd239cc0SJ. Bruce Fields if (dp == NULL) 2827dd239cc0SJ. Bruce Fields goto out_no_deleg; 2828acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2829edab9782SJ. Bruce Fields if (status) 2830dd239cc0SJ. Bruce Fields goto out_free; 28311da177e4SLinus Torvalds 28321da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 28331da177e4SLinus Torvalds 28348c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 28358c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 28361da177e4SLinus Torvalds out: 28377b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 28387b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 28397b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 28402fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 28411da177e4SLinus Torvalds open->op_delegate_type = flag; 2842dd239cc0SJ. Bruce Fields return; 2843dd239cc0SJ. Bruce Fields out_free: 2844acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2845dd239cc0SJ. Bruce Fields out_no_deleg: 2846dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2847dd239cc0SJ. Bruce Fields goto out; 28481da177e4SLinus Torvalds } 28491da177e4SLinus Torvalds 28501da177e4SLinus Torvalds /* 28511da177e4SLinus Torvalds * called with nfs4_lock_state() held. 28521da177e4SLinus Torvalds */ 2853b37ad28bSAl Viro __be32 28541da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 28551da177e4SLinus Torvalds { 28566668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 28571da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 28581da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 28591da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2860567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2861b37ad28bSAl Viro __be32 status; 28621da177e4SLinus Torvalds 28631da177e4SLinus Torvalds status = nfserr_inval; 2864d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2865ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 28661da177e4SLinus Torvalds goto out; 28671da177e4SLinus Torvalds /* 28681da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 28691da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 28701da177e4SLinus Torvalds * If not found, create the nfs4_file struct 28711da177e4SLinus Torvalds */ 28721da177e4SLinus Torvalds fp = find_file(ino); 28731da177e4SLinus Torvalds if (fp) { 28741da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 28751da177e4SLinus Torvalds goto out; 2876c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2877c44c5eebSNeilBrown if (status) 2878c44c5eebSNeilBrown goto out; 28791da177e4SLinus Torvalds } else { 2880c44c5eebSNeilBrown status = nfserr_bad_stateid; 2881c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2882c44c5eebSNeilBrown goto out; 28833e772463SJ. Bruce Fields status = nfserr_jukebox; 28841da177e4SLinus Torvalds fp = alloc_init_file(ino); 28851da177e4SLinus Torvalds if (fp == NULL) 28861da177e4SLinus Torvalds goto out; 28871da177e4SLinus Torvalds } 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds /* 28901da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 28911da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 28921da177e4SLinus Torvalds */ 28931da177e4SLinus Torvalds if (stp) { 28941da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2895f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 28961da177e4SLinus Torvalds if (status) 28971da177e4SLinus Torvalds goto out; 28981da177e4SLinus Torvalds } else { 2899f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2900567d9829SNeilBrown if (status) 29011da177e4SLinus Torvalds goto out; 29021da177e4SLinus Torvalds init_stateid(stp, fp, open); 29031da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 29041da177e4SLinus Torvalds if (status) { 29052283963fSJ. Bruce Fields release_open_stateid(stp); 29061da177e4SLinus Torvalds goto out; 29071da177e4SLinus Torvalds } 29081da177e4SLinus Torvalds } 290973997dc4SJ. Bruce Fields update_stateid(&stp->st_stateid); 29101da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 29111da177e4SLinus Torvalds 29124dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 29136668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 29146668958fSAndy Adamson 29151da177e4SLinus Torvalds /* 29161da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 29171da177e4SLinus Torvalds * OPEN succeeds even if we fail. 29181da177e4SLinus Torvalds */ 29191da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds status = nfs_ok; 29221da177e4SLinus Torvalds 29238c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 29248c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 29251da177e4SLinus Torvalds out: 292613cd2184SNeilBrown if (fp) 292713cd2184SNeilBrown put_nfs4_file(fp); 292837515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 292937515177SNeilBrown nfs4_set_claim_prev(open); 29301da177e4SLinus Torvalds /* 29311da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 29321da177e4SLinus Torvalds */ 29331da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 29346668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 29356668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 29361da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 29371da177e4SLinus Torvalds 29381da177e4SLinus Torvalds return status; 29391da177e4SLinus Torvalds } 29401da177e4SLinus Torvalds 2941b37ad28bSAl Viro __be32 2942b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2943b591480bSJ.Bruce Fields clientid_t *clid) 29441da177e4SLinus Torvalds { 29451da177e4SLinus Torvalds struct nfs4_client *clp; 2946b37ad28bSAl Viro __be32 status; 29471da177e4SLinus Torvalds 29481da177e4SLinus Torvalds nfs4_lock_state(); 29491da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 29501da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29511da177e4SLinus Torvalds status = nfserr_stale_clientid; 29521da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 29531da177e4SLinus Torvalds goto out; 29541da177e4SLinus Torvalds clp = find_confirmed_client(clid); 29551da177e4SLinus Torvalds status = nfserr_expired; 29561da177e4SLinus Torvalds if (clp == NULL) { 29571da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 29581da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 29591da177e4SLinus Torvalds goto out; 29601da177e4SLinus Torvalds } 29611da177e4SLinus Torvalds renew_client(clp); 29621da177e4SLinus Torvalds status = nfserr_cb_path_down; 2963ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 296477a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 29651da177e4SLinus Torvalds goto out; 29661da177e4SLinus Torvalds status = nfs_ok; 29671da177e4SLinus Torvalds out: 29681da177e4SLinus Torvalds nfs4_unlock_state(); 29691da177e4SLinus Torvalds return status; 29701da177e4SLinus Torvalds } 29711da177e4SLinus Torvalds 2972c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 2973af558e33SJ. Bruce Fields }; 2974af558e33SJ. Bruce Fields 2975a76b4319SNeilBrown static void 2976af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2977a76b4319SNeilBrown { 2978a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2979c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2980af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2981e46b498cSJ. Bruce Fields /* 2982e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2983e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2984e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2985e46b498cSJ. Bruce Fields */ 2986e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2987a76b4319SNeilBrown } 2988a76b4319SNeilBrown 2989fd39ca9aSNeilBrown static time_t 29901da177e4SLinus Torvalds nfs4_laundromat(void) 29911da177e4SLinus Torvalds { 29921da177e4SLinus Torvalds struct nfs4_client *clp; 29931da177e4SLinus Torvalds struct nfs4_stateowner *sop; 29941da177e4SLinus Torvalds struct nfs4_delegation *dp; 29951da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 2996cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 2997cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 2998cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 29991da177e4SLinus Torvalds 30001da177e4SLinus Torvalds nfs4_lock_state(); 30011da177e4SLinus Torvalds 30021da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3003af558e33SJ. Bruce Fields if (locks_in_grace()) 3004af558e33SJ. Bruce Fields nfsd4_end_grace(); 300536acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 300636acb66bSBenny Halevy spin_lock(&client_lock); 30071da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 30081da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 30091da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 30101da177e4SLinus Torvalds t = clp->cl_time - cutoff; 30111da177e4SLinus Torvalds if (clientid_val > t) 30121da177e4SLinus Torvalds clientid_val = t; 30131da177e4SLinus Torvalds break; 30141da177e4SLinus Torvalds } 3015d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3016d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3017d7682988SBenny Halevy clp->cl_clientid.cl_id); 3018d7682988SBenny Halevy continue; 3019d7682988SBenny Halevy } 3020d7682988SBenny Halevy unhash_client_locked(clp); 3021d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 302236acb66bSBenny Halevy } 302336acb66bSBenny Halevy spin_unlock(&client_lock); 302436acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 302536acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 30261da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 30271da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3028c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 30291da177e4SLinus Torvalds expire_client(clp); 30301da177e4SLinus Torvalds } 30311da177e4SLinus Torvalds spin_lock(&recall_lock); 30321da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 30331da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30341da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 30351da177e4SLinus Torvalds u = dp->dl_time - cutoff; 30361da177e4SLinus Torvalds if (test_val > u) 30371da177e4SLinus Torvalds test_val = u; 30381da177e4SLinus Torvalds break; 30391da177e4SLinus Torvalds } 30401da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 30411da177e4SLinus Torvalds } 30421da177e4SLinus Torvalds spin_unlock(&recall_lock); 30431da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 30441da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30451da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 30461da177e4SLinus Torvalds unhash_delegation(dp); 30471da177e4SLinus Torvalds } 3048cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 30491da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 30501da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 30511da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 30521da177e4SLinus Torvalds u = sop->so_time - cutoff; 30531da177e4SLinus Torvalds if (test_val > u) 30541da177e4SLinus Torvalds test_val = u; 30551da177e4SLinus Torvalds break; 30561da177e4SLinus Torvalds } 30571da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 30581da177e4SLinus Torvalds sop->so_id); 3059f044ff83SJ. Bruce Fields release_openowner(sop); 30601da177e4SLinus Torvalds } 30611da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 30621da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 30631da177e4SLinus Torvalds nfs4_unlock_state(); 30641da177e4SLinus Torvalds return clientid_val; 30651da177e4SLinus Torvalds } 30661da177e4SLinus Torvalds 3067a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3068a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3069a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3070a254b246SHarvey Harrison 3071a254b246SHarvey Harrison static void 3072c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 30731da177e4SLinus Torvalds { 30741da177e4SLinus Torvalds time_t t; 30751da177e4SLinus Torvalds 30761da177e4SLinus Torvalds t = nfs4_laundromat(); 30771da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 307858da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 30791da177e4SLinus Torvalds } 30801da177e4SLinus Torvalds 3081fd39ca9aSNeilBrown static struct nfs4_stateowner * 3082f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 3083f8816512SNeilBrown { 30841da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 30851da177e4SLinus Torvalds 30861da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 30871da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 30881da177e4SLinus Torvalds if (local->so_id == st_id) 30891da177e4SLinus Torvalds return local; 30901da177e4SLinus Torvalds } 30911da177e4SLinus Torvalds } 30921da177e4SLinus Torvalds return NULL; 30931da177e4SLinus Torvalds } 30941da177e4SLinus Torvalds 30951da177e4SLinus Torvalds static inline int 30961da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 30971da177e4SLinus Torvalds { 3098f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 30991da177e4SLinus Torvalds } 31001da177e4SLinus Torvalds 31011da177e4SLinus Torvalds static int 31021da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 31031da177e4SLinus Torvalds { 3104e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 3105e4e83ea4SJ. Bruce Fields return 0; 31068c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 31078c10cbdbSBenny Halevy STATEID_VAL(stateid)); 31081da177e4SLinus Torvalds return 1; 31091da177e4SLinus Torvalds } 31101da177e4SLinus Torvalds 31111da177e4SLinus Torvalds static inline int 31121da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 31131da177e4SLinus Torvalds { 31141da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 31151da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 31161da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 31171da177e4SLinus Torvalds } 31181da177e4SLinus Torvalds 31191da177e4SLinus Torvalds static inline int 31201da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 31211da177e4SLinus Torvalds { 31221da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 31231da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 31241da177e4SLinus Torvalds } 31251da177e4SLinus Torvalds 31261da177e4SLinus Torvalds static 3127b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 31281da177e4SLinus Torvalds { 3129b37ad28bSAl Viro __be32 status = nfserr_openmode; 31301da177e4SLinus Torvalds 313102921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 313202921914SJ. Bruce Fields if (stp->st_openstp) 313302921914SJ. Bruce Fields stp = stp->st_openstp; 31341da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 31351da177e4SLinus Torvalds goto out; 31361da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 31371da177e4SLinus Torvalds goto out; 31381da177e4SLinus Torvalds status = nfs_ok; 31391da177e4SLinus Torvalds out: 31401da177e4SLinus Torvalds return status; 31411da177e4SLinus Torvalds } 31421da177e4SLinus Torvalds 3143b37ad28bSAl Viro static inline __be32 31441da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 31451da177e4SLinus Torvalds { 3146203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 31471da177e4SLinus Torvalds return nfs_ok; 3148af558e33SJ. Bruce Fields else if (locks_in_grace()) { 314925985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 31501da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 31511da177e4SLinus Torvalds return nfserr_grace; 31521da177e4SLinus Torvalds } else if (flags & WR_STATE) 31531da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31541da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 31551da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 31561da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31571da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 31581da177e4SLinus Torvalds } 31591da177e4SLinus Torvalds 31601da177e4SLinus Torvalds /* 31611da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 31621da177e4SLinus Torvalds * that are not able to provide mandatory locking. 31631da177e4SLinus Torvalds */ 31641da177e4SLinus Torvalds static inline int 316518f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 31661da177e4SLinus Torvalds { 3167203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 31681da177e4SLinus Torvalds } 31691da177e4SLinus Torvalds 317081b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 317181b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 317281b82965SJ. Bruce Fields { 317381b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 317481b82965SJ. Bruce Fields } 317581b82965SJ. Bruce Fields 317628dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 31770836f587SJ. Bruce Fields { 31786668958fSAndy Adamson /* 31796668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 31806668958fSAndy Adamson * when it is zero. 31816668958fSAndy Adamson */ 318228dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 318381b82965SJ. Bruce Fields return nfs_ok; 318481b82965SJ. Bruce Fields 318581b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 318681b82965SJ. Bruce Fields return nfs_ok; 31876668958fSAndy Adamson 31880836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 318981b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 31900836f587SJ. Bruce Fields return nfserr_bad_stateid; 31910836f587SJ. Bruce Fields /* 319281b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 319381b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 319481b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 319581b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 319681b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 319781b82965SJ. Bruce Fields * but better performance may result in retrying IO that 319881b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 319981b82965SJ. Bruce Fields * reordered in flight: 32000836f587SJ. Bruce Fields */ 32010836f587SJ. Bruce Fields return nfserr_old_stateid; 32020836f587SJ. Bruce Fields } 32030836f587SJ. Bruce Fields 32043e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 32053e633079SJ. Bruce Fields { 32063e633079SJ. Bruce Fields return stateid->si_fileid == 0; 32073e633079SJ. Bruce Fields } 32083e633079SJ. Bruce Fields 320928dde241SJ. Bruce Fields __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) 321017456804SBryan Schumaker { 321117456804SBryan Schumaker struct nfs4_stateid *stp = NULL; 321217456804SBryan Schumaker __be32 status = nfserr_stale_stateid; 321317456804SBryan Schumaker 321417456804SBryan Schumaker if (STALE_STATEID(stateid)) 321517456804SBryan Schumaker goto out; 321617456804SBryan Schumaker 321717456804SBryan Schumaker status = nfserr_expired; 3218b79abaddSJ. Bruce Fields stp = find_stateid(stateid, 0); 321917456804SBryan Schumaker if (!stp) 322017456804SBryan Schumaker goto out; 322117456804SBryan Schumaker status = nfserr_bad_stateid; 322217456804SBryan Schumaker 322317456804SBryan Schumaker if (!stp->st_stateowner->so_confirmed) 322417456804SBryan Schumaker goto out; 322517456804SBryan Schumaker 322628dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid, has_session); 322717456804SBryan Schumaker if (status) 322817456804SBryan Schumaker goto out; 322917456804SBryan Schumaker 323017456804SBryan Schumaker status = nfs_ok; 323117456804SBryan Schumaker out: 323217456804SBryan Schumaker return status; 323317456804SBryan Schumaker } 323417456804SBryan Schumaker 32351da177e4SLinus Torvalds /* 32361da177e4SLinus Torvalds * Checks for stateid operations 32371da177e4SLinus Torvalds */ 3238b37ad28bSAl Viro __be32 3239dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3240dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 32411da177e4SLinus Torvalds { 32421da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 32431da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3244dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 32451da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3246b37ad28bSAl Viro __be32 status; 32471da177e4SLinus Torvalds 32481da177e4SLinus Torvalds if (filpp) 32491da177e4SLinus Torvalds *filpp = NULL; 32501da177e4SLinus Torvalds 325118f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 32521da177e4SLinus Torvalds return nfserr_grace; 32531da177e4SLinus Torvalds 32541da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 32551da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 32561da177e4SLinus Torvalds 32571da177e4SLinus Torvalds status = nfserr_stale_stateid; 32581da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 32591da177e4SLinus Torvalds goto out; 32601da177e4SLinus Torvalds 326133515142SJ. Bruce Fields /* 326233515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 326333515142SJ. Bruce Fields * but that we can't find, is expired: 326433515142SJ. Bruce Fields */ 326533515142SJ. Bruce Fields status = nfserr_expired; 32663e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3267a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3268e4e83ea4SJ. Bruce Fields if (!dp) 32691da177e4SLinus Torvalds goto out; 327028dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 32710c2a498fSJ. Bruce Fields if (status) 32720c2a498fSJ. Bruce Fields goto out; 3273dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3274dc9bf700SJ. Bruce Fields if (status) 3275dc9bf700SJ. Bruce Fields goto out; 3276dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 327743b0178eSDan Carpenter if (filpp) { 3278acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3279f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 328043b0178eSDan Carpenter } 32811da177e4SLinus Torvalds } else { /* open or lock stateid */ 3282a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3283e4e83ea4SJ. Bruce Fields if (!stp) 32841da177e4SLinus Torvalds goto out; 328533515142SJ. Bruce Fields status = nfserr_bad_stateid; 32866150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 32871da177e4SLinus Torvalds goto out; 32881da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 32891da177e4SLinus Torvalds goto out; 32906668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 329128dde241SJ. Bruce Fields nfsd4_has_session(cstate)); 32920836f587SJ. Bruce Fields if (status) 32931da177e4SLinus Torvalds goto out; 3294a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3295a4455be0SJ. Bruce Fields if (status) 32961da177e4SLinus Torvalds goto out; 32971da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3298f9d7562fSJ. Bruce Fields if (filpp) { 3299f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3300f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3301f9d7562fSJ. Bruce Fields else 3302f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3303f9d7562fSJ. Bruce Fields } 33041da177e4SLinus Torvalds } 33051da177e4SLinus Torvalds status = nfs_ok; 33061da177e4SLinus Torvalds out: 33071da177e4SLinus Torvalds return status; 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds 3310e1ca12dfSBryan Schumaker static __be32 3311e1ca12dfSBryan Schumaker nfsd4_free_delegation_stateid(stateid_t *stateid) 3312e1ca12dfSBryan Schumaker { 3313e1ca12dfSBryan Schumaker struct nfs4_delegation *dp = search_for_delegation(stateid); 3314e1ca12dfSBryan Schumaker if (dp) 3315e1ca12dfSBryan Schumaker return nfserr_locks_held; 3316e1ca12dfSBryan Schumaker return nfserr_bad_stateid; 3317e1ca12dfSBryan Schumaker } 3318e1ca12dfSBryan Schumaker 3319e1ca12dfSBryan Schumaker static __be32 3320e1ca12dfSBryan Schumaker nfsd4_free_lock_stateid(struct nfs4_stateid *stp) 3321e1ca12dfSBryan Schumaker { 3322e1ca12dfSBryan Schumaker if (check_for_locks(stp->st_file, stp->st_stateowner)) 3323e1ca12dfSBryan Schumaker return nfserr_locks_held; 3324e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3325e1ca12dfSBryan Schumaker return nfs_ok; 3326e1ca12dfSBryan Schumaker } 3327e1ca12dfSBryan Schumaker 3328e1ca12dfSBryan Schumaker /* 332917456804SBryan Schumaker * Test if the stateid is valid 333017456804SBryan Schumaker */ 333117456804SBryan Schumaker __be32 333217456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 333317456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 333417456804SBryan Schumaker { 333517456804SBryan Schumaker test_stateid->ts_has_session = nfsd4_has_session(cstate); 333617456804SBryan Schumaker return nfs_ok; 333717456804SBryan Schumaker } 333817456804SBryan Schumaker 333917456804SBryan Schumaker /* 3340e1ca12dfSBryan Schumaker * Free a state id 3341e1ca12dfSBryan Schumaker */ 3342e1ca12dfSBryan Schumaker __be32 3343e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3344e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3345e1ca12dfSBryan Schumaker { 3346e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 3347e1ca12dfSBryan Schumaker struct nfs4_stateid *stp; 3348e1ca12dfSBryan Schumaker __be32 ret; 3349e1ca12dfSBryan Schumaker 3350e1ca12dfSBryan Schumaker nfs4_lock_state(); 3351e1ca12dfSBryan Schumaker if (is_delegation_stateid(stateid)) { 3352e1ca12dfSBryan Schumaker ret = nfsd4_free_delegation_stateid(stateid); 3353e1ca12dfSBryan Schumaker goto out; 3354e1ca12dfSBryan Schumaker } 3355e1ca12dfSBryan Schumaker 3356b79abaddSJ. Bruce Fields stp = find_stateid(stateid, 0); 3357e1ca12dfSBryan Schumaker if (!stp) { 3358e1ca12dfSBryan Schumaker ret = nfserr_bad_stateid; 3359e1ca12dfSBryan Schumaker goto out; 3360e1ca12dfSBryan Schumaker } 336181b82965SJ. Bruce Fields ret = check_stateid_generation(stateid, &stp->st_stateid, 1); 336281b82965SJ. Bruce Fields if (ret) 3363e1ca12dfSBryan Schumaker goto out; 3364e1ca12dfSBryan Schumaker 33655fa0bbb4SJ. Bruce Fields if (stp->st_type == NFS4_OPEN_STID) { 3366e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3367e1ca12dfSBryan Schumaker goto out; 3368e1ca12dfSBryan Schumaker } else { 3369e1ca12dfSBryan Schumaker ret = nfsd4_free_lock_stateid(stp); 3370e1ca12dfSBryan Schumaker goto out; 3371e1ca12dfSBryan Schumaker } 3372e1ca12dfSBryan Schumaker 3373e1ca12dfSBryan Schumaker out: 3374e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3375e1ca12dfSBryan Schumaker return ret; 3376e1ca12dfSBryan Schumaker } 3377e1ca12dfSBryan Schumaker 33784c4cd222SNeilBrown static inline int 33794c4cd222SNeilBrown setlkflg (int type) 33804c4cd222SNeilBrown { 33814c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 33824c4cd222SNeilBrown RD_STATE : WR_STATE; 33834c4cd222SNeilBrown } 33841da177e4SLinus Torvalds 33851da177e4SLinus Torvalds /* 33861da177e4SLinus Torvalds * Checks for sequence id mutating operations. 33871da177e4SLinus Torvalds */ 3388b37ad28bSAl Viro static __be32 3389dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3390dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3391dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 3392b34f27aaSJ. Bruce Fields struct nfs4_stateid **stpp) 33931da177e4SLinus Torvalds { 33941da177e4SLinus Torvalds struct nfs4_stateid *stp; 33951da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3396dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 33970836f587SJ. Bruce Fields __be32 status; 33981da177e4SLinus Torvalds 33998c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 34008c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 34011da177e4SLinus Torvalds 34021da177e4SLinus Torvalds *stpp = NULL; 34031da177e4SLinus Torvalds *sopp = NULL; 34041da177e4SLinus Torvalds 34051da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 34062fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 34073a4f98bbSNeilBrown return nfserr_bad_stateid; 34081da177e4SLinus Torvalds } 34091da177e4SLinus Torvalds 34101da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 34113a4f98bbSNeilBrown return nfserr_stale_stateid; 34126668958fSAndy Adamson 34131da177e4SLinus Torvalds /* 34141da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 34151da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 34161da177e4SLinus Torvalds * number is incorrect. 34171da177e4SLinus Torvalds */ 3418f8816512SNeilBrown stp = find_stateid(stateid, flags); 3419f8816512SNeilBrown if (stp == NULL) { 3420f8816512SNeilBrown /* 3421f8816512SNeilBrown * Also, we should make sure this isn't just the result of 3422f8816512SNeilBrown * a replayed close: 3423f8816512SNeilBrown */ 3424f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 342533515142SJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3426f8816512SNeilBrown if (sop == NULL) 342733515142SJ. Bruce Fields return nfserr_expired; 3428f8816512SNeilBrown *sopp = sop; 3429f8816512SNeilBrown goto check_replay; 3430f8816512SNeilBrown } 34311da177e4SLinus Torvalds 343239325bd0SJ. Bruce Fields *stpp = stp; 343339325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 343439325bd0SJ. Bruce Fields 3435f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 34362fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 34373a4f98bbSNeilBrown return nfserr_bad_stateid; 34381da177e4SLinus Torvalds } 34391da177e4SLinus Torvalds 344028dde241SJ. Bruce Fields if (!nfsd4_has_session(cstate) && seqid != sop->so_seqid) 34411da177e4SLinus Torvalds goto check_replay; 34421da177e4SLinus Torvalds 34433a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 34442fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 34453a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 34463a4f98bbSNeilBrown return nfserr_bad_stateid; 34471da177e4SLinus Torvalds } 34483a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 34492fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 34503a4f98bbSNeilBrown " confirmed yet!\n"); 34513a4f98bbSNeilBrown return nfserr_bad_stateid; 34521da177e4SLinus Torvalds } 345328dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid, nfsd4_has_session(cstate)); 34540836f587SJ. Bruce Fields if (status) 34550836f587SJ. Bruce Fields return status; 345652fd004eSNeilBrown renew_client(sop->so_client); 34573a4f98bbSNeilBrown return nfs_ok; 34581da177e4SLinus Torvalds 34591da177e4SLinus Torvalds check_replay: 3460bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3461849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 34621da177e4SLinus Torvalds /* indicate replay to calling function */ 3463a90b061cSAl Viro return nfserr_replay_me; 34641da177e4SLinus Torvalds } 34652fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 34663a4f98bbSNeilBrown sop->so_seqid, seqid); 34673a4f98bbSNeilBrown *sopp = NULL; 34683a4f98bbSNeilBrown return nfserr_bad_seqid; 34691da177e4SLinus Torvalds } 34701da177e4SLinus Torvalds 3471b37ad28bSAl Viro __be32 3472ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3473a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 34741da177e4SLinus Torvalds { 3475b37ad28bSAl Viro __be32 status; 34761da177e4SLinus Torvalds struct nfs4_stateowner *sop; 34771da177e4SLinus Torvalds struct nfs4_stateid *stp; 34781da177e4SLinus Torvalds 34791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3480ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3481ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 34821da177e4SLinus Torvalds 3483ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3484a8cddc5dSJ. Bruce Fields if (status) 3485a8cddc5dSJ. Bruce Fields return status; 34861da177e4SLinus Torvalds 34871da177e4SLinus Torvalds nfs4_lock_state(); 34881da177e4SLinus Torvalds 3489dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3490ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3491f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 3492b34f27aaSJ. Bruce Fields &oc->oc_stateowner, &stp))) 34931da177e4SLinus Torvalds goto out; 34941da177e4SLinus Torvalds 34951da177e4SLinus Torvalds sop = oc->oc_stateowner; 34961da177e4SLinus Torvalds sop->so_confirmed = 1; 34971da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 34981da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 34998c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 35008c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3501c7b9a459SNeilBrown 3502c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 35031da177e4SLinus Torvalds out: 3504f2327d9aSNeil Brown if (oc->oc_stateowner) { 35051da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3506a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3507f2327d9aSNeil Brown } 35081da177e4SLinus Torvalds nfs4_unlock_state(); 35091da177e4SLinus Torvalds return status; 35101da177e4SLinus Torvalds } 35111da177e4SLinus Torvalds 3512f197c271SJ. Bruce Fields static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) 35131da177e4SLinus Torvalds { 35141da177e4SLinus Torvalds int i; 3515f197c271SJ. Bruce Fields 35161da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 3517f197c271SJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { 3518f197c271SJ. Bruce Fields nfs4_file_put_access(stp->st_file, i); 3519f197c271SJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 3520f197c271SJ. Bruce Fields } 35211da177e4SLinus Torvalds } 35221da177e4SLinus Torvalds } 35231da177e4SLinus Torvalds 35241da177e4SLinus Torvalds static void 35251da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 35261da177e4SLinus Torvalds { 35271da177e4SLinus Torvalds int i; 35281da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 35291da177e4SLinus Torvalds if ((i & deny) != i) 35301da177e4SLinus Torvalds __clear_bit(i, bmap); 35311da177e4SLinus Torvalds } 35321da177e4SLinus Torvalds } 35331da177e4SLinus Torvalds 3534b37ad28bSAl Viro __be32 3535ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3536ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3537a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 35381da177e4SLinus Torvalds { 3539b37ad28bSAl Viro __be32 status; 35401da177e4SLinus Torvalds struct nfs4_stateid *stp; 35411da177e4SLinus Torvalds 35421da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3543ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3544ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35451da177e4SLinus Torvalds 3546d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3547ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 35481da177e4SLinus Torvalds return nfserr_inval; 35491da177e4SLinus Torvalds 35501da177e4SLinus Torvalds nfs4_lock_state(); 3551dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3552ca364317SJ.Bruce Fields od->od_seqid, 35531da177e4SLinus Torvalds &od->od_stateid, 3554f3362737SJ. Bruce Fields OPEN_STATE, 3555b34f27aaSJ. Bruce Fields &od->od_stateowner, &stp))) 35561da177e4SLinus Torvalds goto out; 35571da177e4SLinus Torvalds 35581da177e4SLinus Torvalds status = nfserr_inval; 35591da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 35601da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 35611da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 35621da177e4SLinus Torvalds goto out; 35631da177e4SLinus Torvalds } 35641da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 35651da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 35661da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 35671da177e4SLinus Torvalds goto out; 35681da177e4SLinus Torvalds } 3569f197c271SJ. Bruce Fields nfs4_file_downgrade(stp, od->od_share_access); 35701da177e4SLinus Torvalds 35711da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 35721da177e4SLinus Torvalds 35731da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 35741da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 35751da177e4SLinus Torvalds status = nfs_ok; 35761da177e4SLinus Torvalds out: 3577f2327d9aSNeil Brown if (od->od_stateowner) { 35781da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3579a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3580f2327d9aSNeil Brown } 35811da177e4SLinus Torvalds nfs4_unlock_state(); 35821da177e4SLinus Torvalds return status; 35831da177e4SLinus Torvalds } 35841da177e4SLinus Torvalds 35851da177e4SLinus Torvalds /* 35861da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 35871da177e4SLinus Torvalds */ 3588b37ad28bSAl Viro __be32 3589ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3590a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 35911da177e4SLinus Torvalds { 3592b37ad28bSAl Viro __be32 status; 35931da177e4SLinus Torvalds struct nfs4_stateid *stp; 35941da177e4SLinus Torvalds 35951da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3596ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3597ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35981da177e4SLinus Torvalds 35991da177e4SLinus Torvalds nfs4_lock_state(); 36001da177e4SLinus Torvalds /* check close_lru for replay */ 3601dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3602ca364317SJ.Bruce Fields close->cl_seqid, 36031da177e4SLinus Torvalds &close->cl_stateid, 3604f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 3605b34f27aaSJ. Bruce Fields &close->cl_stateowner, &stp))) 36061da177e4SLinus Torvalds goto out; 36071da177e4SLinus Torvalds status = nfs_ok; 36081da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 36091da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 36101da177e4SLinus Torvalds 361104ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 36122283963fSJ. Bruce Fields release_open_stateid(stp); 361304ef5954SJ. Bruce Fields 361404ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 361504ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 361604ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 361704ef5954SJ. Bruce Fields */ 361804ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 361904ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 36201da177e4SLinus Torvalds out: 3621f2327d9aSNeil Brown if (close->cl_stateowner) { 36221da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3623a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3624f2327d9aSNeil Brown } 36251da177e4SLinus Torvalds nfs4_unlock_state(); 36261da177e4SLinus Torvalds return status; 36271da177e4SLinus Torvalds } 36281da177e4SLinus Torvalds 3629b37ad28bSAl Viro __be32 3630ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3631ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 36321da177e4SLinus Torvalds { 3633203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3634203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3635203a8c8eSJ. Bruce Fields struct inode *inode; 3636b37ad28bSAl Viro __be32 status; 36371da177e4SLinus Torvalds 3638ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3639203a8c8eSJ. Bruce Fields return status; 3640203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 36411da177e4SLinus Torvalds 36421da177e4SLinus Torvalds nfs4_lock_state(); 3643203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3644203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3645203a8c8eSJ. Bruce Fields goto out; 3646203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3647203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3648203a8c8eSJ. Bruce Fields goto out; 36497e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3650203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3651203a8c8eSJ. Bruce Fields goto out; 365233515142SJ. Bruce Fields status = nfserr_expired; 3653203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3654e4e83ea4SJ. Bruce Fields if (!dp) 3655203a8c8eSJ. Bruce Fields goto out; 365628dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 3657203a8c8eSJ. Bruce Fields if (status) 3658203a8c8eSJ. Bruce Fields goto out; 3659203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3660203a8c8eSJ. Bruce Fields 3661203a8c8eSJ. Bruce Fields unhash_delegation(dp); 36621da177e4SLinus Torvalds out: 3663203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3664203a8c8eSJ. Bruce Fields 36651da177e4SLinus Torvalds return status; 36661da177e4SLinus Torvalds } 36671da177e4SLinus Torvalds 36681da177e4SLinus Torvalds 36691da177e4SLinus Torvalds /* 36701da177e4SLinus Torvalds * Lock owner state (byte-range locks) 36711da177e4SLinus Torvalds */ 36721da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 36731da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 36741da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 36751da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 36761da177e4SLinus Torvalds 367787df4de8SBenny Halevy static inline u64 367887df4de8SBenny Halevy end_offset(u64 start, u64 len) 367987df4de8SBenny Halevy { 368087df4de8SBenny Halevy u64 end; 368187df4de8SBenny Halevy 368287df4de8SBenny Halevy end = start + len; 368387df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 368487df4de8SBenny Halevy } 368587df4de8SBenny Halevy 368687df4de8SBenny Halevy /* last octet in a range */ 368787df4de8SBenny Halevy static inline u64 368887df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 368987df4de8SBenny Halevy { 369087df4de8SBenny Halevy u64 end; 369187df4de8SBenny Halevy 369287df4de8SBenny Halevy BUG_ON(!len); 369387df4de8SBenny Halevy end = start + len; 369487df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 369587df4de8SBenny Halevy } 369687df4de8SBenny Halevy 3697ddc04c41SJ. Bruce Fields static unsigned int lockownerid_hashval(u32 id) 3698ddc04c41SJ. Bruce Fields { 3699ddc04c41SJ. Bruce Fields return id & LOCK_HASH_MASK; 3700ddc04c41SJ. Bruce Fields } 37011da177e4SLinus Torvalds 37021da177e4SLinus Torvalds static inline unsigned int 37031da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 37041da177e4SLinus Torvalds struct xdr_netobj *ownername) 37051da177e4SLinus Torvalds { 37061da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 37071da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 37081da177e4SLinus Torvalds & LOCK_HASH_MASK; 37091da177e4SLinus Torvalds } 37101da177e4SLinus Torvalds 37111da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 37121da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 37131da177e4SLinus Torvalds 3714e1ca12dfSBryan Schumaker static int 3715e1ca12dfSBryan Schumaker same_stateid(stateid_t *id_one, stateid_t *id_two) 3716e1ca12dfSBryan Schumaker { 3717e1ca12dfSBryan Schumaker if (id_one->si_stateownerid != id_two->si_stateownerid) 3718e1ca12dfSBryan Schumaker return 0; 3719e1ca12dfSBryan Schumaker return id_one->si_fileid == id_two->si_fileid; 3720e1ca12dfSBryan Schumaker } 3721e1ca12dfSBryan Schumaker 3722b79abaddSJ. Bruce Fields static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) 37231da177e4SLinus Torvalds { 3724b79abaddSJ. Bruce Fields struct nfs4_stateid *s; 37251da177e4SLinus Torvalds unsigned int hashval; 37261da177e4SLinus Torvalds 3727b79abaddSJ. Bruce Fields hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); 3728b79abaddSJ. Bruce Fields list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { 3729b79abaddSJ. Bruce Fields if (!same_stateid(&s->st_stateid, t)) 3730b79abaddSJ. Bruce Fields continue; 3731b79abaddSJ. Bruce Fields if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) 37321da177e4SLinus Torvalds return NULL; 3733b79abaddSJ. Bruce Fields if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) 3734b79abaddSJ. Bruce Fields return NULL; 3735b79abaddSJ. Bruce Fields return s; 3736e1ca12dfSBryan Schumaker } 3737e1ca12dfSBryan Schumaker return NULL; 3738e1ca12dfSBryan Schumaker } 3739e1ca12dfSBryan Schumaker 3740e1ca12dfSBryan Schumaker static struct nfs4_delegation * 3741e1ca12dfSBryan Schumaker search_for_delegation(stateid_t *stid) 3742e1ca12dfSBryan Schumaker { 3743e1ca12dfSBryan Schumaker struct nfs4_file *fp; 3744e1ca12dfSBryan Schumaker struct nfs4_delegation *dp; 3745e1ca12dfSBryan Schumaker struct list_head *pos; 3746e1ca12dfSBryan Schumaker int i; 3747e1ca12dfSBryan Schumaker 3748e1ca12dfSBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 3749e1ca12dfSBryan Schumaker list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { 3750e1ca12dfSBryan Schumaker list_for_each(pos, &fp->fi_delegations) { 3751e1ca12dfSBryan Schumaker dp = list_entry(pos, struct nfs4_delegation, dl_perfile); 3752e1ca12dfSBryan Schumaker if (same_stateid(&dp->dl_stateid, stid)) 3753e1ca12dfSBryan Schumaker return dp; 3754e1ca12dfSBryan Schumaker } 3755e1ca12dfSBryan Schumaker } 3756e1ca12dfSBryan Schumaker } 3757e1ca12dfSBryan Schumaker return NULL; 3758e1ca12dfSBryan Schumaker } 3759e1ca12dfSBryan Schumaker 37601da177e4SLinus Torvalds static struct nfs4_delegation * 37611da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 37621da177e4SLinus Torvalds { 376313cd2184SNeilBrown struct nfs4_file *fp; 376413cd2184SNeilBrown struct nfs4_delegation *dl; 37651da177e4SLinus Torvalds 37668c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 37678c10cbdbSBenny Halevy STATEID_VAL(stid)); 37681da177e4SLinus Torvalds 37691da177e4SLinus Torvalds fp = find_file(ino); 377013cd2184SNeilBrown if (!fp) 37711da177e4SLinus Torvalds return NULL; 377213cd2184SNeilBrown dl = find_delegation_file(fp, stid); 377313cd2184SNeilBrown put_nfs4_file(fp); 377413cd2184SNeilBrown return dl; 37751da177e4SLinus Torvalds } 37761da177e4SLinus Torvalds 37771da177e4SLinus Torvalds /* 37781da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 37791da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 37801da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 37811da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 37821da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 37831da177e4SLinus Torvalds * the VFS, but this is a very deep change! 37841da177e4SLinus Torvalds */ 37851da177e4SLinus Torvalds static inline void 37861da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 37871da177e4SLinus Torvalds { 37881da177e4SLinus Torvalds if (lock->fl_start < 0) 37891da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 37901da177e4SLinus Torvalds if (lock->fl_end < 0) 37911da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 37921da177e4SLinus Torvalds } 37931da177e4SLinus Torvalds 3794d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3795d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 37967b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3797d5b9026aSNeilBrown }; 37981da177e4SLinus Torvalds 37991da177e4SLinus Torvalds static inline void 38001da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 38011da177e4SLinus Torvalds { 3802d5b9026aSNeilBrown struct nfs4_stateowner *sop; 38031da177e4SLinus Torvalds 3804d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3805d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 38061da177e4SLinus Torvalds kref_get(&sop->so_ref); 38071da177e4SLinus Torvalds deny->ld_sop = sop; 38081da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3809d5b9026aSNeilBrown } else { 3810d5b9026aSNeilBrown deny->ld_sop = NULL; 3811d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3812d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38131da177e4SLinus Torvalds } 38141da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 381587df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 381687df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38171da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38181da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38191da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38201da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38211da177e4SLinus Torvalds } 38221da177e4SLinus Torvalds 38231da177e4SLinus Torvalds static struct nfs4_stateowner * 38241da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 38251da177e4SLinus Torvalds struct xdr_netobj *owner) 38261da177e4SLinus Torvalds { 38271da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 38281da177e4SLinus Torvalds struct nfs4_stateowner *op; 38291da177e4SLinus Torvalds 38301da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3831599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 38321da177e4SLinus Torvalds return op; 38331da177e4SLinus Torvalds } 38341da177e4SLinus Torvalds return NULL; 38351da177e4SLinus Torvalds } 38361da177e4SLinus Torvalds 3837ff194bd9SJ. Bruce Fields static void hash_lockowner(struct nfs4_stateowner *sop, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) 3838ff194bd9SJ. Bruce Fields { 3839ff194bd9SJ. Bruce Fields unsigned int idhashval; 3840ff194bd9SJ. Bruce Fields 3841ff194bd9SJ. Bruce Fields idhashval = lockownerid_hashval(sop->so_id); 3842ff194bd9SJ. Bruce Fields list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 3843ff194bd9SJ. Bruce Fields list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3844ff194bd9SJ. Bruce Fields list_add(&sop->so_perstateid, &open_stp->st_lockowners); 3845ff194bd9SJ. Bruce Fields } 3846ff194bd9SJ. Bruce Fields 38471da177e4SLinus Torvalds /* 38481da177e4SLinus Torvalds * Alloc a lock owner structure. 38491da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 385025985edcSLucas De Marchi * occurred. 38511da177e4SLinus Torvalds * 38521da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 38531da177e4SLinus Torvalds */ 38541da177e4SLinus Torvalds 38551da177e4SLinus Torvalds static struct nfs4_stateowner * 38561da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 38571da177e4SLinus Torvalds struct nfs4_stateowner *sop; 38581da177e4SLinus Torvalds 3859ff194bd9SJ. Bruce Fields sop = alloc_stateowner(&lock->lk_new_owner, clp); 3860ff194bd9SJ. Bruce Fields if (!sop) 38611da177e4SLinus Torvalds return NULL; 3862ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 38631da177e4SLinus Torvalds sop->so_is_open_owner = 0; 3864b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3865b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3866b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 38671da177e4SLinus Torvalds sop->so_confirmed = 1; 3868ff194bd9SJ. Bruce Fields hash_lockowner(sop, strhashval, clp, open_stp); 38691da177e4SLinus Torvalds return sop; 38701da177e4SLinus Torvalds } 38711da177e4SLinus Torvalds 3872fd39ca9aSNeilBrown static struct nfs4_stateid * 38731da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 38741da177e4SLinus Torvalds { 38751da177e4SLinus Torvalds struct nfs4_stateid *stp; 38761da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 38771da177e4SLinus Torvalds 38785ac049acSNeilBrown stp = nfs4_alloc_stateid(); 38795ac049acSNeilBrown if (stp == NULL) 38801da177e4SLinus Torvalds goto out; 38811da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 38821da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3883ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3884ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 3885b79abaddSJ. Bruce Fields list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 38868beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3887ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 38881da177e4SLinus Torvalds stp->st_stateowner = sop; 38895fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_LOCK_STID; 389013cd2184SNeilBrown get_nfs4_file(fp); 38911da177e4SLinus Torvalds stp->st_file = fp; 3892e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 38931da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 38941da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 389573997dc4SJ. Bruce Fields /* note will be incremented before first return to client: */ 38961da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 38970997b173SJ. Bruce Fields stp->st_access_bmap = 0; 38981da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 38994c4cd222SNeilBrown stp->st_openstp = open_stp; 39001da177e4SLinus Torvalds 39011da177e4SLinus Torvalds out: 39021da177e4SLinus Torvalds return stp; 39031da177e4SLinus Torvalds } 39041da177e4SLinus Torvalds 3905fd39ca9aSNeilBrown static int 39061da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 39071da177e4SLinus Torvalds { 390887df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 39091da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 39101da177e4SLinus Torvalds } 39111da177e4SLinus Torvalds 39120997b173SJ. Bruce Fields static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) 39130997b173SJ. Bruce Fields { 39140997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39150997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39160997b173SJ. Bruce Fields 39170997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39180997b173SJ. Bruce Fields return; 39190997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 39200997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 39210997b173SJ. Bruce Fields } 39220997b173SJ. Bruce Fields 39231da177e4SLinus Torvalds /* 39241da177e4SLinus Torvalds * LOCK operation 39251da177e4SLinus Torvalds */ 3926b37ad28bSAl Viro __be32 3927ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3928a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 39291da177e4SLinus Torvalds { 39303e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3931b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 39321da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 39337d947842SJ. Bruce Fields struct nfs4_file *fp; 39347d947842SJ. Bruce Fields struct file *filp = NULL; 39351da177e4SLinus Torvalds struct file_lock file_lock; 39368dc7c311SAndy Adamson struct file_lock conflock; 3937b37ad28bSAl Viro __be32 status = 0; 39381da177e4SLinus Torvalds unsigned int strhashval; 3939b34f27aaSJ. Bruce Fields int lkflg; 3940b8dd7b9aSAl Viro int err; 39411da177e4SLinus Torvalds 39421da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 39431da177e4SLinus Torvalds (long long) lock->lk_offset, 39441da177e4SLinus Torvalds (long long) lock->lk_length); 39451da177e4SLinus Torvalds 39461da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 39471da177e4SLinus Torvalds return nfserr_inval; 39481da177e4SLinus Torvalds 3949ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 39508837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3951a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3952a6f6ef2fSAndy Adamson return status; 3953a6f6ef2fSAndy Adamson } 3954a6f6ef2fSAndy Adamson 39551da177e4SLinus Torvalds nfs4_lock_state(); 39561da177e4SLinus Torvalds 39571da177e4SLinus Torvalds if (lock->lk_is_new) { 39581da177e4SLinus Torvalds /* 39591da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3960893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3961893f8770SNeilBrown * lock stateid. 39621da177e4SLinus Torvalds */ 39631da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 39641da177e4SLinus Torvalds 39651da177e4SLinus Torvalds status = nfserr_stale_clientid; 396660adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 396760adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 39681da177e4SLinus Torvalds goto out; 39691da177e4SLinus Torvalds 39701da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3971dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 39721da177e4SLinus Torvalds lock->lk_new_open_seqid, 39731da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3974f3362737SJ. Bruce Fields OPEN_STATE, 3975b34f27aaSJ. Bruce Fields &lock->lk_replay_owner, &open_stp); 397637515177SNeilBrown if (status) 39771da177e4SLinus Torvalds goto out; 3978b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 39793a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 3980b34f27aaSJ. Bruce Fields if (!nfsd4_has_session(cstate) && 3981b34f27aaSJ. Bruce Fields !same_clid(&open_sop->so_client->cl_clientid, 3982b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 3983b34f27aaSJ. Bruce Fields goto out; 39841da177e4SLinus Torvalds /* create lockowner and lock stateid */ 39851da177e4SLinus Torvalds fp = open_stp->st_file; 39861da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 39871da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 39881da177e4SLinus Torvalds &lock->v.new.owner); 39893e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 39903e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 39913e9e3dbeSNeilBrown * create new stateids)? */ 39923e772463SJ. Bruce Fields status = nfserr_jukebox; 3993b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3994b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3995b59e3c0eSNeil Brown if (lock_sop == NULL) 39961da177e4SLinus Torvalds goto out; 3997b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 39988a280510SJ. Bruce Fields if (lock_stp == NULL) 39991da177e4SLinus Torvalds goto out; 40001da177e4SLinus Torvalds } else { 40011da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 4002dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 40031da177e4SLinus Torvalds lock->lk_old_lock_seqid, 40041da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 4005f3362737SJ. Bruce Fields LOCK_STATE, 4006b34f27aaSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp); 40071da177e4SLinus Torvalds if (status) 40081da177e4SLinus Torvalds goto out; 40093a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 40107d947842SJ. Bruce Fields fp = lock_stp->st_file; 40111da177e4SLinus Torvalds } 40123a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 40131da177e4SLinus Torvalds 4014b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4015b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4016b34f27aaSJ. Bruce Fields if (status) 4017b34f27aaSJ. Bruce Fields goto out; 4018b34f27aaSJ. Bruce Fields 40190dd395dcSNeilBrown status = nfserr_grace; 4020af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40210dd395dcSNeilBrown goto out; 40220dd395dcSNeilBrown status = nfserr_no_grace; 4023af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40240dd395dcSNeilBrown goto out; 40250dd395dcSNeilBrown 40261da177e4SLinus Torvalds locks_init_lock(&file_lock); 40271da177e4SLinus Torvalds switch (lock->lk_type) { 40281da177e4SLinus Torvalds case NFS4_READ_LT: 40291da177e4SLinus Torvalds case NFS4_READW_LT: 4030f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 40310997b173SJ. Bruce Fields if (filp) 40320997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 40331da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 40341da177e4SLinus Torvalds break; 40351da177e4SLinus Torvalds case NFS4_WRITE_LT: 40361da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4037f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 40380997b173SJ. Bruce Fields if (filp) 40390997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 40401da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 40411da177e4SLinus Torvalds break; 40421da177e4SLinus Torvalds default: 40431da177e4SLinus Torvalds status = nfserr_inval; 40441da177e4SLinus Torvalds goto out; 40451da177e4SLinus Torvalds } 4046f9d7562fSJ. Bruce Fields if (!filp) { 4047f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4048f9d7562fSJ. Bruce Fields goto out; 4049f9d7562fSJ. Bruce Fields } 4050b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 40511da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40521da177e4SLinus Torvalds file_lock.fl_file = filp; 40531da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4054d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40551da177e4SLinus Torvalds 40561da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 405787df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 40581da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40591da177e4SLinus Torvalds 40601da177e4SLinus Torvalds /* 40611da177e4SLinus Torvalds * Try to lock the file in the VFS. 40621da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 40631da177e4SLinus Torvalds */ 40641da177e4SLinus Torvalds 4065529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4066b8dd7b9aSAl Viro switch (-err) { 40671da177e4SLinus Torvalds case 0: /* success! */ 40681da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 40691da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 40701da177e4SLinus Torvalds sizeof(stateid_t)); 4071b8dd7b9aSAl Viro status = 0; 4072eb76b3fdSAndy Adamson break; 4073eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4074eb76b3fdSAndy Adamson status = nfserr_denied; 4075eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4076eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4077eb76b3fdSAndy Adamson break; 40781da177e4SLinus Torvalds case (EDEADLK): 40791da177e4SLinus Torvalds status = nfserr_deadlock; 4080eb76b3fdSAndy Adamson break; 40811da177e4SLinus Torvalds default: 4082fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 40833e772463SJ. Bruce Fields status = nfserrno(err); 4084eb76b3fdSAndy Adamson break; 40851da177e4SLinus Torvalds } 40861da177e4SLinus Torvalds out: 40878a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 4088f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 40893a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 40903a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 4091a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 4092f2327d9aSNeil Brown } 40931da177e4SLinus Torvalds nfs4_unlock_state(); 40941da177e4SLinus Torvalds return status; 40951da177e4SLinus Torvalds } 40961da177e4SLinus Torvalds 40971da177e4SLinus Torvalds /* 409855ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 409955ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 410055ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 410155ef1274SJ. Bruce Fields * inode operation.) 410255ef1274SJ. Bruce Fields */ 410355ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 410455ef1274SJ. Bruce Fields { 410555ef1274SJ. Bruce Fields struct file *file; 410655ef1274SJ. Bruce Fields int err; 410755ef1274SJ. Bruce Fields 410855ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 410955ef1274SJ. Bruce Fields if (err) 411055ef1274SJ. Bruce Fields return err; 411155ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 411255ef1274SJ. Bruce Fields nfsd_close(file); 411355ef1274SJ. Bruce Fields return err; 411455ef1274SJ. Bruce Fields } 411555ef1274SJ. Bruce Fields 411655ef1274SJ. Bruce Fields /* 41171da177e4SLinus Torvalds * LOCKT operation 41181da177e4SLinus Torvalds */ 4119b37ad28bSAl Viro __be32 4120ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4121ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41221da177e4SLinus Torvalds { 41231da177e4SLinus Torvalds struct inode *inode; 41241da177e4SLinus Torvalds struct file_lock file_lock; 4125fd85b817SMarc Eshel int error; 4126b37ad28bSAl Viro __be32 status; 41271da177e4SLinus Torvalds 4128af558e33SJ. Bruce Fields if (locks_in_grace()) 41291da177e4SLinus Torvalds return nfserr_grace; 41301da177e4SLinus Torvalds 41311da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 41321da177e4SLinus Torvalds return nfserr_inval; 41331da177e4SLinus Torvalds 41341da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 41351da177e4SLinus Torvalds nfs4_lock_state(); 41361da177e4SLinus Torvalds 41371da177e4SLinus Torvalds status = nfserr_stale_clientid; 413860adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 41391da177e4SLinus Torvalds goto out; 41401da177e4SLinus Torvalds 414175c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 41421da177e4SLinus Torvalds goto out; 41431da177e4SLinus Torvalds 4144ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 41451da177e4SLinus Torvalds locks_init_lock(&file_lock); 41461da177e4SLinus Torvalds switch (lockt->lt_type) { 41471da177e4SLinus Torvalds case NFS4_READ_LT: 41481da177e4SLinus Torvalds case NFS4_READW_LT: 41491da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41501da177e4SLinus Torvalds break; 41511da177e4SLinus Torvalds case NFS4_WRITE_LT: 41521da177e4SLinus Torvalds case NFS4_WRITEW_LT: 41531da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41541da177e4SLinus Torvalds break; 41551da177e4SLinus Torvalds default: 41562fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 41571da177e4SLinus Torvalds status = nfserr_inval; 41581da177e4SLinus Torvalds goto out; 41591da177e4SLinus Torvalds } 41601da177e4SLinus Torvalds 41611da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 41621da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 41631da177e4SLinus Torvalds if (lockt->lt_stateowner) 41641da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 41651da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41661da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 41671da177e4SLinus Torvalds 41681da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 416987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 41701da177e4SLinus Torvalds 41711da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41721da177e4SLinus Torvalds 41731da177e4SLinus Torvalds status = nfs_ok; 417455ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4175fd85b817SMarc Eshel if (error) { 4176fd85b817SMarc Eshel status = nfserrno(error); 4177fd85b817SMarc Eshel goto out; 4178fd85b817SMarc Eshel } 41799d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 41801da177e4SLinus Torvalds status = nfserr_denied; 41819d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 41821da177e4SLinus Torvalds } 41831da177e4SLinus Torvalds out: 41841da177e4SLinus Torvalds nfs4_unlock_state(); 41851da177e4SLinus Torvalds return status; 41861da177e4SLinus Torvalds } 41871da177e4SLinus Torvalds 4188b37ad28bSAl Viro __be32 4189ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4190a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 41911da177e4SLinus Torvalds { 41921da177e4SLinus Torvalds struct nfs4_stateid *stp; 41931da177e4SLinus Torvalds struct file *filp = NULL; 41941da177e4SLinus Torvalds struct file_lock file_lock; 4195b37ad28bSAl Viro __be32 status; 4196b8dd7b9aSAl Viro int err; 41971da177e4SLinus Torvalds 41981da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 41991da177e4SLinus Torvalds (long long) locku->lu_offset, 42001da177e4SLinus Torvalds (long long) locku->lu_length); 42011da177e4SLinus Torvalds 42021da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 42031da177e4SLinus Torvalds return nfserr_inval; 42041da177e4SLinus Torvalds 42051da177e4SLinus Torvalds nfs4_lock_state(); 42061da177e4SLinus Torvalds 4207dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 42081da177e4SLinus Torvalds locku->lu_seqid, 42091da177e4SLinus Torvalds &locku->lu_stateid, 4210f3362737SJ. Bruce Fields LOCK_STATE, 4211b34f27aaSJ. Bruce Fields &locku->lu_stateowner, &stp))) 42121da177e4SLinus Torvalds goto out; 42131da177e4SLinus Torvalds 4214f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4215f9d7562fSJ. Bruce Fields if (!filp) { 4216f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4217f9d7562fSJ. Bruce Fields goto out; 4218f9d7562fSJ. Bruce Fields } 42191da177e4SLinus Torvalds BUG_ON(!filp); 42201da177e4SLinus Torvalds locks_init_lock(&file_lock); 42211da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 42221da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 42231da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42241da177e4SLinus Torvalds file_lock.fl_file = filp; 42251da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4226d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42271da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42281da177e4SLinus Torvalds 422987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42301da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42311da177e4SLinus Torvalds 42321da177e4SLinus Torvalds /* 42331da177e4SLinus Torvalds * Try to unlock the file in the VFS. 42341da177e4SLinus Torvalds */ 4235fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4236b8dd7b9aSAl Viro if (err) { 4237fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 42381da177e4SLinus Torvalds goto out_nfserr; 42391da177e4SLinus Torvalds } 42401da177e4SLinus Torvalds /* 42411da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 42421da177e4SLinus Torvalds */ 42431da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 42441da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 42451da177e4SLinus Torvalds 42461da177e4SLinus Torvalds out: 4247f2327d9aSNeil Brown if (locku->lu_stateowner) { 42481da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 4249a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 4250f2327d9aSNeil Brown } 42511da177e4SLinus Torvalds nfs4_unlock_state(); 42521da177e4SLinus Torvalds return status; 42531da177e4SLinus Torvalds 42541da177e4SLinus Torvalds out_nfserr: 4255b8dd7b9aSAl Viro status = nfserrno(err); 42561da177e4SLinus Torvalds goto out; 42571da177e4SLinus Torvalds } 42581da177e4SLinus Torvalds 42591da177e4SLinus Torvalds /* 42601da177e4SLinus Torvalds * returns 42611da177e4SLinus Torvalds * 1: locks held by lockowner 42621da177e4SLinus Torvalds * 0: no locks held by lockowner 42631da177e4SLinus Torvalds */ 42641da177e4SLinus Torvalds static int 4265f9d7562fSJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_stateowner *lowner) 42661da177e4SLinus Torvalds { 42671da177e4SLinus Torvalds struct file_lock **flpp; 4268f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 42691da177e4SLinus Torvalds int status = 0; 42701da177e4SLinus Torvalds 4271b89f4321SArnd Bergmann lock_flocks(); 42721da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4273796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 42741da177e4SLinus Torvalds status = 1; 42751da177e4SLinus Torvalds goto out; 42761da177e4SLinus Torvalds } 4277796dadfdSJ. Bruce Fields } 42781da177e4SLinus Torvalds out: 4279b89f4321SArnd Bergmann unlock_flocks(); 42801da177e4SLinus Torvalds return status; 42811da177e4SLinus Torvalds } 42821da177e4SLinus Torvalds 4283b37ad28bSAl Viro __be32 4284b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4285b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4286b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 42871da177e4SLinus Torvalds { 42881da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 42893e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 42903e9e3dbeSNeilBrown struct nfs4_stateid *stp; 42911da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 42923e9e3dbeSNeilBrown struct list_head matches; 42933e9e3dbeSNeilBrown int i; 4294b37ad28bSAl Viro __be32 status; 42951da177e4SLinus Torvalds 42961da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 42971da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 42981da177e4SLinus Torvalds 42991da177e4SLinus Torvalds /* XXX check for lease expiration */ 43001da177e4SLinus Torvalds 43011da177e4SLinus Torvalds status = nfserr_stale_clientid; 4302849823c5SNeil Brown if (STALE_CLIENTID(clid)) 43031da177e4SLinus Torvalds return status; 43041da177e4SLinus Torvalds 43051da177e4SLinus Torvalds nfs4_lock_state(); 43061da177e4SLinus Torvalds 43071da177e4SLinus Torvalds status = nfserr_locks_held; 43083e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 43093e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 43103e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 43113e9e3dbeSNeilBrown * data structures. */ 43123e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 43133e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 43143e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4315599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 43163e9e3dbeSNeilBrown continue; 43173e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4318ea1da636SNeilBrown st_perstateowner) { 4319f9d7562fSJ. Bruce Fields if (check_for_locks(stp->st_file, sop)) 43201da177e4SLinus Torvalds goto out; 43213e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 43223e9e3dbeSNeilBrown * so it's OK to fool with here. */ 43233e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 43241da177e4SLinus Torvalds } 43253e9e3dbeSNeilBrown } 43263e9e3dbeSNeilBrown } 43273e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43283e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43293e9e3dbeSNeilBrown * have been checked. */ 43301da177e4SLinus Torvalds status = nfs_ok; 43310fa822e4SNeilBrown while (!list_empty(&matches)) { 43320fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 43330fa822e4SNeilBrown so_perclient); 43340fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43350fa822e4SNeilBrown * for openowners. */ 43360fa822e4SNeilBrown list_del(&sop->so_perclient); 4337f044ff83SJ. Bruce Fields release_lockowner(sop); 43381da177e4SLinus Torvalds } 43391da177e4SLinus Torvalds out: 43401da177e4SLinus Torvalds nfs4_unlock_state(); 43411da177e4SLinus Torvalds return status; 43421da177e4SLinus Torvalds } 43431da177e4SLinus Torvalds 43441da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4345a55370a3SNeilBrown alloc_reclaim(void) 43461da177e4SLinus Torvalds { 4347a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 43481da177e4SLinus Torvalds } 43491da177e4SLinus Torvalds 4350c7b9a459SNeilBrown int 4351a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4352c7b9a459SNeilBrown { 4353c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4354c7b9a459SNeilBrown struct nfs4_client *clp; 4355c7b9a459SNeilBrown 4356e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4357c7b9a459SNeilBrown return clp ? 1 : 0; 4358c7b9a459SNeilBrown } 4359c7b9a459SNeilBrown 43601da177e4SLinus Torvalds /* 43611da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 43621da177e4SLinus Torvalds */ 4363190e4fbfSNeilBrown int 4364190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 43651da177e4SLinus Torvalds { 43661da177e4SLinus Torvalds unsigned int strhashval; 43671da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43681da177e4SLinus Torvalds 4369a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4370a55370a3SNeilBrown crp = alloc_reclaim(); 43711da177e4SLinus Torvalds if (!crp) 43721da177e4SLinus Torvalds return 0; 4373a55370a3SNeilBrown strhashval = clientstr_hashval(name); 43741da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 43751da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4376a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 43771da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 43781da177e4SLinus Torvalds return 1; 43791da177e4SLinus Torvalds } 43801da177e4SLinus Torvalds 43811da177e4SLinus Torvalds static void 43821da177e4SLinus Torvalds nfs4_release_reclaim(void) 43831da177e4SLinus Torvalds { 43841da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43851da177e4SLinus Torvalds int i; 43861da177e4SLinus Torvalds 43871da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43881da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 43891da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 43901da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 43911da177e4SLinus Torvalds list_del(&crp->cr_strhash); 43921da177e4SLinus Torvalds kfree(crp); 43931da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 43941da177e4SLinus Torvalds } 43951da177e4SLinus Torvalds } 43961da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 43971da177e4SLinus Torvalds } 43981da177e4SLinus Torvalds 43991da177e4SLinus Torvalds /* 44001da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4401fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 44021da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 44031da177e4SLinus Torvalds { 44041da177e4SLinus Torvalds unsigned int strhashval; 44051da177e4SLinus Torvalds struct nfs4_client *clp; 44061da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 44071da177e4SLinus Torvalds 44081da177e4SLinus Torvalds 44091da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 44101da177e4SLinus Torvalds clp = find_confirmed_client(clid); 44111da177e4SLinus Torvalds if (clp == NULL) 44121da177e4SLinus Torvalds return NULL; 44131da177e4SLinus Torvalds 4414a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4415a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4416a55370a3SNeilBrown clp->cl_recdir); 44171da177e4SLinus Torvalds 44181da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4419a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 44201da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4421a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 44221da177e4SLinus Torvalds return crp; 44231da177e4SLinus Torvalds } 44241da177e4SLinus Torvalds } 44251da177e4SLinus Torvalds return NULL; 44261da177e4SLinus Torvalds } 44271da177e4SLinus Torvalds 44281da177e4SLinus Torvalds /* 44291da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44301da177e4SLinus Torvalds */ 4431b37ad28bSAl Viro __be32 44321da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44331da177e4SLinus Torvalds { 4434dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44351da177e4SLinus Torvalds } 44361da177e4SLinus Torvalds 4437ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 44381da177e4SLinus Torvalds 4439e8ff2a84SJ. Bruce Fields int 4440ac4d8ff2SNeilBrown nfs4_state_init(void) 44411da177e4SLinus Torvalds { 4442e8ff2a84SJ. Bruce Fields int i, status; 44431da177e4SLinus Torvalds 4444e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4445e8ff2a84SJ. Bruce Fields if (status) 4446e8ff2a84SJ. Bruce Fields return status; 44471da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44481da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 44491da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 44501da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 44511da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 445202cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 44531da177e4SLinus Torvalds } 44545282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 44555282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 44561da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 44571da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 44581da177e4SLinus Torvalds } 4459506f275fSJ. Bruce Fields for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { 4460506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); 4461506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); 44621da177e4SLinus Torvalds } 4463b79abaddSJ. Bruce Fields for (i = 0; i < STATEID_HASH_SIZE; i++) 44641da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 44651da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 44661da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 44671da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 44681da177e4SLinus Torvalds } 44691da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 44701da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 44711da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 44721da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4473ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4474e8ff2a84SJ. Bruce Fields return 0; 4475ac4d8ff2SNeilBrown } 4476ac4d8ff2SNeilBrown 4477190e4fbfSNeilBrown static void 4478190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4479190e4fbfSNeilBrown { 4480190e4fbfSNeilBrown int status; 4481190e4fbfSNeilBrown 44820964a3d3SNeilBrown nfs4_lock_state(); 448348483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4484190e4fbfSNeilBrown status = nfsd4_recdir_load(); 44850964a3d3SNeilBrown nfs4_unlock_state(); 4486190e4fbfSNeilBrown if (status) 4487190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4488190e4fbfSNeilBrown } 4489190e4fbfSNeilBrown 4490c2f1a551SMeelap Shah /* 4491c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4492c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4493c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4494c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4495c2f1a551SMeelap Shah * 4496c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4497c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4498c2f1a551SMeelap Shah */ 4499c2f1a551SMeelap Shah static void 4500c2f1a551SMeelap Shah set_max_delegations(void) 4501c2f1a551SMeelap Shah { 4502c2f1a551SMeelap Shah /* 4503c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4504c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4505c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4506c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4507c2f1a551SMeelap Shah */ 4508c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4509c2f1a551SMeelap Shah } 4510c2f1a551SMeelap Shah 4511ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4512ac4d8ff2SNeilBrown 451329ab23ccSJ. Bruce Fields static int 4514ac4d8ff2SNeilBrown __nfs4_state_start(void) 4515ac4d8ff2SNeilBrown { 4516b5a1a81eSJ. Bruce Fields int ret; 4517b5a1a81eSJ. Bruce Fields 45181da177e4SLinus Torvalds boot_time = get_seconds(); 4519af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 45209a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4521e46b498cSJ. Bruce Fields nfsd4_grace); 4522b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4523b5a1a81eSJ. Bruce Fields if (ret) 4524b5a1a81eSJ. Bruce Fields return -ENOMEM; 452558da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 452629ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 452729ab23ccSJ. Bruce Fields return -ENOMEM; 4528b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4529b5a1a81eSJ. Bruce Fields if (ret) 4530b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4531e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4532c2f1a551SMeelap Shah set_max_delegations(); 4533b5a1a81eSJ. Bruce Fields return 0; 4534b5a1a81eSJ. Bruce Fields out_free_laundry: 4535b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4536b5a1a81eSJ. Bruce Fields return ret; 45371da177e4SLinus Torvalds } 45381da177e4SLinus Torvalds 453929ab23ccSJ. Bruce Fields int 454076a3550eSNeilBrown nfs4_state_start(void) 45411da177e4SLinus Torvalds { 4542190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 45434ad9a344SJeff Layton return __nfs4_state_start(); 45441da177e4SLinus Torvalds } 45451da177e4SLinus Torvalds 45461da177e4SLinus Torvalds static void 45471da177e4SLinus Torvalds __nfs4_state_shutdown(void) 45481da177e4SLinus Torvalds { 45491da177e4SLinus Torvalds int i; 45501da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 45511da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 45521da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 45531da177e4SLinus Torvalds 45541da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45551da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 45561da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 45571da177e4SLinus Torvalds expire_client(clp); 45581da177e4SLinus Torvalds } 45591da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 45601da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 45611da177e4SLinus Torvalds expire_client(clp); 45621da177e4SLinus Torvalds } 45631da177e4SLinus Torvalds } 45641da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 45651da177e4SLinus Torvalds spin_lock(&recall_lock); 45661da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 45671da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 45681da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 45691da177e4SLinus Torvalds } 45701da177e4SLinus Torvalds spin_unlock(&recall_lock); 45711da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 45721da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 45731da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 45741da177e4SLinus Torvalds unhash_delegation(dp); 45751da177e4SLinus Torvalds } 45761da177e4SLinus Torvalds 4577190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 45781da177e4SLinus Torvalds } 45791da177e4SLinus Torvalds 45801da177e4SLinus Torvalds void 45811da177e4SLinus Torvalds nfs4_state_shutdown(void) 45821da177e4SLinus Torvalds { 4583afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 45845e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 45852c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 45861da177e4SLinus Torvalds nfs4_lock_state(); 45871da177e4SLinus Torvalds nfs4_release_reclaim(); 45881da177e4SLinus Torvalds __nfs4_state_shutdown(); 45891da177e4SLinus Torvalds nfs4_unlock_state(); 4590c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 45911da177e4SLinus Torvalds } 4592