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); 66fe0750e5SJ. Bruce Fields static int check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *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 80fe0750e5SJ. Bruce Fields static struct kmem_cache *openowner_slab = NULL; 81fe0750e5SJ. Bruce Fields static struct kmem_cache *lockowner_slab = NULL; 82e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 83e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 84e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 85e60d4398SNeilBrown 861da177e4SLinus Torvalds void 871da177e4SLinus Torvalds nfs4_lock_state(void) 881da177e4SLinus Torvalds { 89353ab6e9SIngo Molnar mutex_lock(&client_mutex); 901da177e4SLinus Torvalds } 911da177e4SLinus Torvalds 921da177e4SLinus Torvalds void 931da177e4SLinus Torvalds nfs4_unlock_state(void) 941da177e4SLinus Torvalds { 95353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds static inline u32 991da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1001da177e4SLinus Torvalds { 1011da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds u32 x = 0; 1041da177e4SLinus Torvalds while (nbytes--) { 1051da177e4SLinus Torvalds x *= 37; 1061da177e4SLinus Torvalds x += *cptr++; 1071da177e4SLinus Torvalds } 1081da177e4SLinus Torvalds return x; 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static struct list_head del_recall_lru; 1121da177e4SLinus Torvalds 11313cd2184SNeilBrown static inline void 11413cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 11513cd2184SNeilBrown { 1168b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1178b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1188b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1198b671b80SJ. Bruce Fields iput(fi->fi_inode); 1208b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1218b671b80SJ. Bruce Fields } 12213cd2184SNeilBrown } 12313cd2184SNeilBrown 12413cd2184SNeilBrown static inline void 12513cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 12613cd2184SNeilBrown { 1278b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 12813cd2184SNeilBrown } 12913cd2184SNeilBrown 130ef0f3390SNeilBrown static int num_delegations; 131c2f1a551SMeelap Shah unsigned int max_delegations; 132ef0f3390SNeilBrown 133ef0f3390SNeilBrown /* 134ef0f3390SNeilBrown * Open owner state (share locks) 135ef0f3390SNeilBrown */ 136ef0f3390SNeilBrown 137506f275fSJ. Bruce Fields /* hash tables for open owners */ 138506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_BITS 8 139506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_SIZE (1 << OPEN_OWNER_HASH_BITS) 140506f275fSJ. Bruce Fields #define OPEN_OWNER_HASH_MASK (OPEN_OWNER_HASH_SIZE - 1) 141ef0f3390SNeilBrown 142506f275fSJ. Bruce Fields static unsigned int open_ownerid_hashval(const u32 id) 143ddc04c41SJ. Bruce Fields { 144506f275fSJ. Bruce Fields return id & OPEN_OWNER_HASH_MASK; 145ddc04c41SJ. Bruce Fields } 146ddc04c41SJ. Bruce Fields 147506f275fSJ. Bruce Fields static unsigned int open_ownerstr_hashval(u32 clientid, struct xdr_netobj *ownername) 148ddc04c41SJ. Bruce Fields { 149ddc04c41SJ. Bruce Fields unsigned int ret; 150ddc04c41SJ. Bruce Fields 151ddc04c41SJ. Bruce Fields ret = opaque_hashval(ownername->data, ownername->len); 152ddc04c41SJ. Bruce Fields ret += clientid; 153506f275fSJ. Bruce Fields return ret & OPEN_OWNER_HASH_MASK; 154ddc04c41SJ. Bruce Fields } 155ef0f3390SNeilBrown 156506f275fSJ. Bruce Fields static struct list_head open_ownerid_hashtbl[OPEN_OWNER_HASH_SIZE]; 157506f275fSJ. Bruce Fields static struct list_head open_ownerstr_hashtbl[OPEN_OWNER_HASH_SIZE]; 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown /* hash table for nfs4_file */ 160ef0f3390SNeilBrown #define FILE_HASH_BITS 8 161ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 16235079582SShan Wei 163ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 164ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 165ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 166ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 167ef0f3390SNeilBrown 168ddc04c41SJ. Bruce Fields static unsigned int file_hashval(struct inode *ino) 169ddc04c41SJ. Bruce Fields { 170ddc04c41SJ. Bruce Fields /* XXX: why are we hashing on inode pointer, anyway? */ 171ddc04c41SJ. Bruce Fields return hash_ptr(ino, FILE_HASH_BITS); 172ddc04c41SJ. Bruce Fields } 173ddc04c41SJ. Bruce Fields 174ddc04c41SJ. Bruce Fields static unsigned int stateid_hashval(u32 owner_id, u32 file_id) 175ddc04c41SJ. Bruce Fields { 176ddc04c41SJ. Bruce Fields return (owner_id + file_id) & STATEID_HASH_MASK; 177ddc04c41SJ. Bruce Fields } 178ef0f3390SNeilBrown 179ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 180ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 181ef0f3390SNeilBrown 182998db52cSJ. Bruce Fields static void __nfs4_file_get_access(struct nfs4_file *fp, int oflag) 183f9d7562fSJ. Bruce Fields { 184f9d7562fSJ. Bruce Fields BUG_ON(!(fp->fi_fds[oflag] || fp->fi_fds[O_RDWR])); 185f9d7562fSJ. Bruce Fields atomic_inc(&fp->fi_access[oflag]); 186f9d7562fSJ. Bruce Fields } 187f9d7562fSJ. Bruce Fields 188998db52cSJ. Bruce Fields static void nfs4_file_get_access(struct nfs4_file *fp, int oflag) 189998db52cSJ. Bruce Fields { 190998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 191998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_RDONLY); 192998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, O_WRONLY); 193998db52cSJ. Bruce Fields } else 194998db52cSJ. Bruce Fields __nfs4_file_get_access(fp, oflag); 195998db52cSJ. Bruce Fields } 196998db52cSJ. Bruce Fields 197998db52cSJ. Bruce Fields static void nfs4_file_put_fd(struct nfs4_file *fp, int oflag) 198f9d7562fSJ. Bruce Fields { 199f9d7562fSJ. Bruce Fields if (fp->fi_fds[oflag]) { 200f9d7562fSJ. Bruce Fields fput(fp->fi_fds[oflag]); 201f9d7562fSJ. Bruce Fields fp->fi_fds[oflag] = NULL; 202f9d7562fSJ. Bruce Fields } 203f9d7562fSJ. Bruce Fields } 204f9d7562fSJ. Bruce Fields 205998db52cSJ. Bruce Fields static void __nfs4_file_put_access(struct nfs4_file *fp, int oflag) 206f9d7562fSJ. Bruce Fields { 207f9d7562fSJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_access[oflag])) { 208f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, O_RDWR); 209f9d7562fSJ. Bruce Fields nfs4_file_put_fd(fp, oflag); 210f9d7562fSJ. Bruce Fields } 211f9d7562fSJ. Bruce Fields } 212f9d7562fSJ. Bruce Fields 213998db52cSJ. Bruce Fields static void nfs4_file_put_access(struct nfs4_file *fp, int oflag) 214998db52cSJ. Bruce Fields { 215998db52cSJ. Bruce Fields if (oflag == O_RDWR) { 216998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_RDONLY); 217998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, O_WRONLY); 218998db52cSJ. Bruce Fields } else 219998db52cSJ. Bruce Fields __nfs4_file_put_access(fp, oflag); 220998db52cSJ. Bruce Fields } 221998db52cSJ. Bruce Fields 2221da177e4SLinus Torvalds static struct nfs4_delegation * 2231da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 2241da177e4SLinus Torvalds { 2251da177e4SLinus Torvalds struct nfs4_delegation *dp; 2261da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 2271da177e4SLinus Torvalds 2281da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 229c3e48080SJ. Bruce Fields /* 230c3e48080SJ. Bruce Fields * Major work on the lease subsystem (for example, to support 231c3e48080SJ. Bruce Fields * calbacks on stat) will be required before we can support 232c3e48080SJ. Bruce Fields * write delegations properly. 233c3e48080SJ. Bruce Fields */ 234c3e48080SJ. Bruce Fields if (type != NFS4_OPEN_DELEGATE_READ) 235c3e48080SJ. Bruce Fields return NULL; 23647f9940cSMeelap Shah if (fp->fi_had_conflict) 23747f9940cSMeelap Shah return NULL; 238c2f1a551SMeelap Shah if (num_delegations > max_delegations) 239ef0f3390SNeilBrown return NULL; 2405b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2415b2d21c1SNeilBrown if (dp == NULL) 2421da177e4SLinus Torvalds return dp; 243ef0f3390SNeilBrown num_delegations++; 244ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 245ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2461da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2471da177e4SLinus Torvalds dp->dl_client = clp; 24813cd2184SNeilBrown get_nfs4_file(fp); 2491da177e4SLinus Torvalds dp->dl_file = fp; 2501da177e4SLinus Torvalds dp->dl_type = type; 251e4e83ea4SJ. Bruce Fields dp->dl_stateid.si_boot = boot_time; 2521da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2531da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 25473997dc4SJ. Bruce Fields dp->dl_stateid.si_generation = 1; 2556c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2561da177e4SLinus Torvalds dp->dl_time = 0; 2571da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 258b5a1a81eSJ. Bruce Fields INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); 2591da177e4SLinus Torvalds return dp; 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds void 2631da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2641da177e4SLinus Torvalds { 2651da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2661da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 26713cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2685b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 269ef0f3390SNeilBrown num_delegations--; 2701da177e4SLinus Torvalds } 2711da177e4SLinus Torvalds } 2721da177e4SLinus Torvalds 273acfdf5c3SJ. Bruce Fields static void nfs4_put_deleg_lease(struct nfs4_file *fp) 2741da177e4SLinus Torvalds { 275acfdf5c3SJ. Bruce Fields if (atomic_dec_and_test(&fp->fi_delegees)) { 276acfdf5c3SJ. Bruce Fields vfs_setlease(fp->fi_deleg_file, F_UNLCK, &fp->fi_lease); 277acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2784ee63624SJ. Bruce Fields fput(fp->fi_deleg_file); 279acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = NULL; 280acfdf5c3SJ. Bruce Fields } 2811da177e4SLinus Torvalds } 2821da177e4SLinus Torvalds 2831da177e4SLinus Torvalds /* Called under the state lock. */ 2841da177e4SLinus Torvalds static void 2851da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2861da177e4SLinus Torvalds { 287ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2881da177e4SLinus Torvalds spin_lock(&recall_lock); 2895d926e8cSJ. Bruce Fields list_del_init(&dp->dl_perfile); 2901da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2911da177e4SLinus Torvalds spin_unlock(&recall_lock); 292acfdf5c3SJ. Bruce Fields nfs4_put_deleg_lease(dp->dl_file); 2931da177e4SLinus Torvalds nfs4_put_delegation(dp); 2941da177e4SLinus Torvalds } 2951da177e4SLinus Torvalds 2961da177e4SLinus Torvalds /* 2971da177e4SLinus Torvalds * SETCLIENTID state 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds 30036acb66bSBenny Halevy /* client_lock protects the client lru list and session hash table */ 3019089f1b4SBenny Halevy static DEFINE_SPINLOCK(client_lock); 3029089f1b4SBenny Halevy 3031da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 3041da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 3051da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 3061da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 3071da177e4SLinus Torvalds 308ddc04c41SJ. Bruce Fields static unsigned int clientid_hashval(u32 id) 309ddc04c41SJ. Bruce Fields { 310ddc04c41SJ. Bruce Fields return id & CLIENT_HASH_MASK; 311ddc04c41SJ. Bruce Fields } 312ddc04c41SJ. Bruce Fields 313ddc04c41SJ. Bruce Fields static unsigned int clientstr_hashval(const char *name) 314ddc04c41SJ. Bruce Fields { 315ddc04c41SJ. Bruce Fields return opaque_hashval(name, 8) & CLIENT_HASH_MASK; 316ddc04c41SJ. Bruce Fields } 317ddc04c41SJ. Bruce Fields 3181da177e4SLinus Torvalds /* 3191da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 3201da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 3211da177e4SLinus Torvalds * 3221da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 3231da177e4SLinus Torvalds * setclientid_confirmed info. 3241da177e4SLinus Torvalds * 3251da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 3261da177e4SLinus Torvalds * setclientid info. 3271da177e4SLinus Torvalds * 3281da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3291da177e4SLinus Torvalds * for lease renewal. 3301da177e4SLinus Torvalds * 3311da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3321da177e4SLinus Torvalds * for last close replay. 3331da177e4SLinus Torvalds */ 3341da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3351da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3361da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3371da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3381da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3391da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3401da177e4SLinus Torvalds static struct list_head client_lru; 3411da177e4SLinus Torvalds static struct list_head close_lru; 3421da177e4SLinus Torvalds 343f9d7562fSJ. Bruce Fields /* 344f9d7562fSJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 345f9d7562fSJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 346f9d7562fSJ. Bruce Fields * only what share bits are currently in force, but also what 347f9d7562fSJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 348f9d7562fSJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 349f9d7562fSJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 350f9d7562fSJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 351f9d7562fSJ. Bruce Fields * 352f9d7562fSJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 353f9d7562fSJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 354f9d7562fSJ. Bruce Fields * 355f9d7562fSJ. Bruce Fields * OPEN allow read, deny write 356f9d7562fSJ. Bruce Fields * OPEN allow both, deny none 357f9d7562fSJ. Bruce Fields * DOWNGRADE allow read, deny none 358f9d7562fSJ. Bruce Fields * 359f9d7562fSJ. Bruce Fields * which we should reject. 360f9d7562fSJ. Bruce Fields */ 361f9d7562fSJ. Bruce Fields static void 362f9d7562fSJ. Bruce Fields set_access(unsigned int *access, unsigned long bmap) { 363f9d7562fSJ. Bruce Fields int i; 364f9d7562fSJ. Bruce Fields 365f9d7562fSJ. Bruce Fields *access = 0; 366f9d7562fSJ. Bruce Fields for (i = 1; i < 4; i++) { 367f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 368f9d7562fSJ. Bruce Fields *access |= i; 369f9d7562fSJ. Bruce Fields } 370f9d7562fSJ. Bruce Fields } 371f9d7562fSJ. Bruce Fields 372f9d7562fSJ. Bruce Fields static void 373f9d7562fSJ. Bruce Fields set_deny(unsigned int *deny, unsigned long bmap) { 374f9d7562fSJ. Bruce Fields int i; 375f9d7562fSJ. Bruce Fields 376f9d7562fSJ. Bruce Fields *deny = 0; 377f9d7562fSJ. Bruce Fields for (i = 0; i < 4; i++) { 378f9d7562fSJ. Bruce Fields if (test_bit(i, &bmap)) 379f9d7562fSJ. Bruce Fields *deny |= i ; 380f9d7562fSJ. Bruce Fields } 381f9d7562fSJ. Bruce Fields } 382f9d7562fSJ. Bruce Fields 383f9d7562fSJ. Bruce Fields static int 384f9d7562fSJ. Bruce Fields test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 385f9d7562fSJ. Bruce Fields unsigned int access, deny; 386f9d7562fSJ. Bruce Fields 387f9d7562fSJ. Bruce Fields set_access(&access, stp->st_access_bmap); 388f9d7562fSJ. Bruce Fields set_deny(&deny, stp->st_deny_bmap); 389f9d7562fSJ. Bruce Fields if ((access & open->op_share_deny) || (deny & open->op_share_access)) 390f9d7562fSJ. Bruce Fields return 0; 391f9d7562fSJ. Bruce Fields return 1; 392f9d7562fSJ. Bruce Fields } 393f9d7562fSJ. Bruce Fields 394f9d7562fSJ. Bruce Fields static int nfs4_access_to_omode(u32 access) 395f9d7562fSJ. Bruce Fields { 3968f34a430SJ. Bruce Fields switch (access & NFS4_SHARE_ACCESS_BOTH) { 397f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_READ: 398f9d7562fSJ. Bruce Fields return O_RDONLY; 399f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_WRITE: 400f9d7562fSJ. Bruce Fields return O_WRONLY; 401f9d7562fSJ. Bruce Fields case NFS4_SHARE_ACCESS_BOTH: 402f9d7562fSJ. Bruce Fields return O_RDWR; 403f9d7562fSJ. Bruce Fields } 404f9d7562fSJ. Bruce Fields BUG(); 405f9d7562fSJ. Bruce Fields } 406f9d7562fSJ. Bruce Fields 407529d7b2aSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 408529d7b2aSJ. Bruce Fields { 409529d7b2aSJ. Bruce Fields list_del(&stp->st_hash); 410529d7b2aSJ. Bruce Fields list_del(&stp->st_perfile); 411529d7b2aSJ. Bruce Fields list_del(&stp->st_perstateowner); 412529d7b2aSJ. Bruce Fields } 413529d7b2aSJ. Bruce Fields 414*4665e2baSJ. Bruce Fields static void close_generic_stateid(struct nfs4_stateid *stp) 415529d7b2aSJ. Bruce Fields { 416499f3edcSJ. Bruce Fields int i; 4170997b173SJ. Bruce Fields 41823fcf2ecSJ. Bruce Fields if (stp->st_access_bmap) { 419499f3edcSJ. Bruce Fields for (i = 1; i < 4; i++) { 420499f3edcSJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap)) 421499f3edcSJ. Bruce Fields nfs4_file_put_access(stp->st_file, 422499f3edcSJ. Bruce Fields nfs4_access_to_omode(i)); 423*4665e2baSJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 424499f3edcSJ. Bruce Fields } 42523fcf2ecSJ. Bruce Fields } 426a96e5b90SOGAWA Hirofumi put_nfs4_file(stp->st_file); 427*4665e2baSJ. Bruce Fields stp->st_file = NULL; 428*4665e2baSJ. Bruce Fields } 429*4665e2baSJ. Bruce Fields 430*4665e2baSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 431*4665e2baSJ. Bruce Fields { 432*4665e2baSJ. Bruce Fields close_generic_stateid(stp); 433529d7b2aSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 434529d7b2aSJ. Bruce Fields } 435529d7b2aSJ. Bruce Fields 436529d7b2aSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 437529d7b2aSJ. Bruce Fields { 438529d7b2aSJ. Bruce Fields struct file *file; 439529d7b2aSJ. Bruce Fields 440529d7b2aSJ. Bruce Fields unhash_generic_stateid(stp); 441529d7b2aSJ. Bruce Fields file = find_any_file(stp->st_file); 442529d7b2aSJ. Bruce Fields if (file) 443fe0750e5SJ. Bruce Fields locks_remove_posix(file, (fl_owner_t)lockowner(stp->st_stateowner)); 444529d7b2aSJ. Bruce Fields free_generic_stateid(stp); 445529d7b2aSJ. Bruce Fields } 446529d7b2aSJ. Bruce Fields 447fe0750e5SJ. Bruce Fields static void unhash_lockowner(struct nfs4_lockowner *lo) 448529d7b2aSJ. Bruce Fields { 449529d7b2aSJ. Bruce Fields struct nfs4_stateid *stp; 450529d7b2aSJ. Bruce Fields 451fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_idhash); 452fe0750e5SJ. Bruce Fields list_del(&lo->lo_owner.so_strhash); 453fe0750e5SJ. Bruce Fields list_del(&lo->lo_perstateid); 454fe0750e5SJ. Bruce Fields while (!list_empty(&lo->lo_owner.so_stateids)) { 455fe0750e5SJ. Bruce Fields stp = list_first_entry(&lo->lo_owner.so_stateids, 456529d7b2aSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 457529d7b2aSJ. Bruce Fields release_lock_stateid(stp); 458529d7b2aSJ. Bruce Fields } 459529d7b2aSJ. Bruce Fields } 460529d7b2aSJ. Bruce Fields 461fe0750e5SJ. Bruce Fields static void release_lockowner(struct nfs4_lockowner *lo) 462529d7b2aSJ. Bruce Fields { 463fe0750e5SJ. Bruce Fields unhash_lockowner(lo); 464fe0750e5SJ. Bruce Fields nfs4_free_lockowner(lo); 465529d7b2aSJ. Bruce Fields } 466529d7b2aSJ. Bruce Fields 467529d7b2aSJ. Bruce Fields static void 468529d7b2aSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 469529d7b2aSJ. Bruce Fields { 470fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 471529d7b2aSJ. Bruce Fields 472529d7b2aSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 473fe0750e5SJ. Bruce Fields lo = list_entry(open_stp->st_lockowners.next, 474fe0750e5SJ. Bruce Fields struct nfs4_lockowner, lo_perstateid); 475fe0750e5SJ. Bruce Fields release_lockowner(lo); 476529d7b2aSJ. Bruce Fields } 477529d7b2aSJ. Bruce Fields } 478529d7b2aSJ. Bruce Fields 4792283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 4802283963fSJ. Bruce Fields { 4812283963fSJ. Bruce Fields unhash_generic_stateid(stp); 4822283963fSJ. Bruce Fields release_stateid_lockowners(stp); 4832283963fSJ. Bruce Fields free_generic_stateid(stp); 4842283963fSJ. Bruce Fields } 4852283963fSJ. Bruce Fields 486fe0750e5SJ. Bruce Fields static void unhash_openowner(struct nfs4_openowner *oo) 487f1d110caSJ. Bruce Fields { 488f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 489f1d110caSJ. Bruce Fields 490fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_idhash); 491fe0750e5SJ. Bruce Fields list_del(&oo->oo_owner.so_strhash); 492fe0750e5SJ. Bruce Fields list_del(&oo->oo_perclient); 493fe0750e5SJ. Bruce Fields while (!list_empty(&oo->oo_owner.so_stateids)) { 494fe0750e5SJ. Bruce Fields stp = list_first_entry(&oo->oo_owner.so_stateids, 495f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 496f1d110caSJ. Bruce Fields release_open_stateid(stp); 497f1d110caSJ. Bruce Fields } 498f1d110caSJ. Bruce Fields } 499f1d110caSJ. Bruce Fields 500fe0750e5SJ. Bruce Fields static void release_openowner(struct nfs4_openowner *oo) 501f1d110caSJ. Bruce Fields { 502fe0750e5SJ. Bruce Fields unhash_openowner(oo); 503fe0750e5SJ. Bruce Fields list_del(&oo->oo_close_lru); 504fe0750e5SJ. Bruce Fields nfs4_free_openowner(oo); 505f1d110caSJ. Bruce Fields } 506f1d110caSJ. Bruce Fields 5075282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 5085282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 5095282fd72SMarc Eshel 5105282fd72SMarc Eshel static inline int 5115282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 5125282fd72SMarc Eshel { 5135282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 5145282fd72SMarc Eshel 5155282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 5165282fd72SMarc Eshel } 5175282fd72SMarc Eshel 5185282fd72SMarc Eshel static inline void 5195282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 5205282fd72SMarc Eshel { 5215282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 5225282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 5235282fd72SMarc Eshel } 5245282fd72SMarc Eshel 525ec6b5d7bSAndy Adamson static void 526ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 527ec6b5d7bSAndy Adamson { 528ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 529ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 530ec6b5d7bSAndy Adamson 531ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 532ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 533ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 534ec6b5d7bSAndy Adamson sid->reserved = 0; 535ec6b5d7bSAndy Adamson } 536ec6b5d7bSAndy Adamson 537ec6b5d7bSAndy Adamson /* 538a649637cSAndy Adamson * The protocol defines ca_maxresponssize_cached to include the size of 539a649637cSAndy Adamson * the rpc header, but all we need to cache is the data starting after 540a649637cSAndy Adamson * the end of the initial SEQUENCE operation--the rest we regenerate 541a649637cSAndy Adamson * each time. Therefore we can advertise a ca_maxresponssize_cached 542a649637cSAndy Adamson * value that is the number of bytes in our cache plus a few additional 543a649637cSAndy Adamson * bytes. In order to stay on the safe side, and not promise more than 544a649637cSAndy Adamson * we can cache, those additional bytes must be the minimum possible: 24 545a649637cSAndy Adamson * bytes of rpc header (xid through accept state, with AUTH_NULL 546a649637cSAndy Adamson * verifier), 12 for the compound header (with zero-length tag), and 44 547a649637cSAndy Adamson * for the SEQUENCE op response: 548ec6b5d7bSAndy Adamson */ 549a649637cSAndy Adamson #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) 550a649637cSAndy Adamson 551557ce264SAndy Adamson static void 552557ce264SAndy Adamson free_session_slots(struct nfsd4_session *ses) 553557ce264SAndy Adamson { 554557ce264SAndy Adamson int i; 555557ce264SAndy Adamson 556557ce264SAndy Adamson for (i = 0; i < ses->se_fchannel.maxreqs; i++) 557557ce264SAndy Adamson kfree(ses->se_slots[i]); 558557ce264SAndy Adamson } 559557ce264SAndy Adamson 560efe0cb6dSJ. Bruce Fields /* 561efe0cb6dSJ. Bruce Fields * We don't actually need to cache the rpc and session headers, so we 562efe0cb6dSJ. Bruce Fields * can allocate a little less for each slot: 563efe0cb6dSJ. Bruce Fields */ 564efe0cb6dSJ. Bruce Fields static inline int slot_bytes(struct nfsd4_channel_attrs *ca) 565efe0cb6dSJ. Bruce Fields { 566efe0cb6dSJ. Bruce Fields return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; 567efe0cb6dSJ. Bruce Fields } 568efe0cb6dSJ. Bruce Fields 5695b6feee9SJ. Bruce Fields static int nfsd4_sanitize_slot_size(u32 size) 570ec6b5d7bSAndy Adamson { 5715b6feee9SJ. Bruce Fields size -= NFSD_MIN_HDR_SEQ_SZ; /* We don't cache the rpc header */ 5725b6feee9SJ. Bruce Fields size = min_t(u32, size, NFSD_SLOT_CACHE_SIZE); 573ec6b5d7bSAndy Adamson 5745b6feee9SJ. Bruce Fields return size; 575557ce264SAndy Adamson } 576557ce264SAndy Adamson 5775b6feee9SJ. Bruce Fields /* 5785b6feee9SJ. Bruce Fields * XXX: If we run out of reserved DRC memory we could (up to a point) 5795b6feee9SJ. Bruce Fields * re-negotiate active sessions and reduce their slot usage to make 5805b6feee9SJ. Bruce Fields * rooom for new connections. For now we just fail the create session. 5815b6feee9SJ. Bruce Fields */ 5825b6feee9SJ. Bruce Fields static int nfsd4_get_drc_mem(int slotsize, u32 num) 5835b6feee9SJ. Bruce Fields { 5845b6feee9SJ. Bruce Fields int avail; 5855b6feee9SJ. Bruce Fields 5865b6feee9SJ. Bruce Fields num = min_t(u32, num, NFSD_MAX_SLOTS_PER_SESSION); 5875b6feee9SJ. Bruce Fields 5885b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 5895b6feee9SJ. Bruce Fields avail = min_t(int, NFSD_MAX_MEM_PER_SESSION, 5905b6feee9SJ. Bruce Fields nfsd_drc_max_mem - nfsd_drc_mem_used); 5915b6feee9SJ. Bruce Fields num = min_t(int, num, avail / slotsize); 5925b6feee9SJ. Bruce Fields nfsd_drc_mem_used += num * slotsize; 5935b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 5945b6feee9SJ. Bruce Fields 5955b6feee9SJ. Bruce Fields return num; 5965b6feee9SJ. Bruce Fields } 5975b6feee9SJ. Bruce Fields 5985b6feee9SJ. Bruce Fields static void nfsd4_put_drc_mem(int slotsize, int num) 5995b6feee9SJ. Bruce Fields { 6005b6feee9SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 6015b6feee9SJ. Bruce Fields nfsd_drc_mem_used -= slotsize * num; 6025b6feee9SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 6035b6feee9SJ. Bruce Fields } 6045b6feee9SJ. Bruce Fields 6055b6feee9SJ. Bruce Fields static struct nfsd4_session *alloc_session(int slotsize, int numslots) 6065b6feee9SJ. Bruce Fields { 6075b6feee9SJ. Bruce Fields struct nfsd4_session *new; 6085b6feee9SJ. Bruce Fields int mem, i; 609ec6b5d7bSAndy Adamson 610c23753daSJ. Bruce Fields BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot *) 611ec6b5d7bSAndy Adamson + sizeof(struct nfsd4_session) > PAGE_SIZE); 6125b6feee9SJ. Bruce Fields mem = numslots * sizeof(struct nfsd4_slot *); 613ec6b5d7bSAndy Adamson 6145b6feee9SJ. Bruce Fields new = kzalloc(sizeof(*new) + mem, GFP_KERNEL); 6156c18ba9fSAlexandros Batsakis if (!new) 6165b6feee9SJ. Bruce Fields return NULL; 617ec6b5d7bSAndy Adamson /* allocate each struct nfsd4_slot and data cache in one piece */ 6185b6feee9SJ. Bruce Fields for (i = 0; i < numslots; i++) { 6195b6feee9SJ. Bruce Fields mem = sizeof(struct nfsd4_slot) + slotsize; 6205b6feee9SJ. Bruce Fields new->se_slots[i] = kzalloc(mem, GFP_KERNEL); 6215b6feee9SJ. Bruce Fields if (!new->se_slots[i]) 622ec6b5d7bSAndy Adamson goto out_free; 623ec6b5d7bSAndy Adamson } 6245b6feee9SJ. Bruce Fields return new; 6255b6feee9SJ. Bruce Fields out_free: 6265b6feee9SJ. Bruce Fields while (i--) 6275b6feee9SJ. Bruce Fields kfree(new->se_slots[i]); 6285b6feee9SJ. Bruce Fields kfree(new); 6295b6feee9SJ. Bruce Fields return NULL; 6305b6feee9SJ. Bruce Fields } 6315b6feee9SJ. Bruce Fields 6325b6feee9SJ. Bruce Fields static void init_forechannel_attrs(struct nfsd4_channel_attrs *new, struct nfsd4_channel_attrs *req, int numslots, int slotsize) 6335b6feee9SJ. Bruce Fields { 6345b6feee9SJ. Bruce Fields u32 maxrpc = nfsd_serv->sv_max_mesg; 6355b6feee9SJ. Bruce Fields 6365b6feee9SJ. Bruce Fields new->maxreqs = numslots; 637d2b21743SMi Jinlong new->maxresp_cached = min_t(u32, req->maxresp_cached, 638d2b21743SMi Jinlong slotsize + NFSD_MIN_HDR_SEQ_SZ); 6395b6feee9SJ. Bruce Fields new->maxreq_sz = min_t(u32, req->maxreq_sz, maxrpc); 6405b6feee9SJ. Bruce Fields new->maxresp_sz = min_t(u32, req->maxresp_sz, maxrpc); 6415b6feee9SJ. Bruce Fields new->maxops = min_t(u32, req->maxops, NFSD_MAX_OPS_PER_COMPOUND); 6425b6feee9SJ. Bruce Fields } 6435b6feee9SJ. Bruce Fields 64419cf5c02SJ. Bruce Fields static void free_conn(struct nfsd4_conn *c) 64519cf5c02SJ. Bruce Fields { 64619cf5c02SJ. Bruce Fields svc_xprt_put(c->cn_xprt); 64719cf5c02SJ. Bruce Fields kfree(c); 64819cf5c02SJ. Bruce Fields } 64919cf5c02SJ. Bruce Fields 65019cf5c02SJ. Bruce Fields static void nfsd4_conn_lost(struct svc_xpt_user *u) 65119cf5c02SJ. Bruce Fields { 65219cf5c02SJ. Bruce Fields struct nfsd4_conn *c = container_of(u, struct nfsd4_conn, cn_xpt_user); 65319cf5c02SJ. Bruce Fields struct nfs4_client *clp = c->cn_session->se_client; 65419cf5c02SJ. Bruce Fields 65519cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 65619cf5c02SJ. Bruce Fields if (!list_empty(&c->cn_persession)) { 65719cf5c02SJ. Bruce Fields list_del(&c->cn_persession); 65819cf5c02SJ. Bruce Fields free_conn(c); 65919cf5c02SJ. Bruce Fields } 66019cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 661eea49806SJ. Bruce Fields nfsd4_probe_callback(clp); 66219cf5c02SJ. Bruce Fields } 66319cf5c02SJ. Bruce Fields 664d29c374cSJ. Bruce Fields static struct nfsd4_conn *alloc_conn(struct svc_rqst *rqstp, u32 flags) 665c7662518SJ. Bruce Fields { 666c7662518SJ. Bruce Fields struct nfsd4_conn *conn; 667c7662518SJ. Bruce Fields 668c7662518SJ. Bruce Fields conn = kmalloc(sizeof(struct nfsd4_conn), GFP_KERNEL); 669c7662518SJ. Bruce Fields if (!conn) 670db90681dSJ. Bruce Fields return NULL; 671c7662518SJ. Bruce Fields svc_xprt_get(rqstp->rq_xprt); 672c7662518SJ. Bruce Fields conn->cn_xprt = rqstp->rq_xprt; 673d29c374cSJ. Bruce Fields conn->cn_flags = flags; 674db90681dSJ. Bruce Fields INIT_LIST_HEAD(&conn->cn_xpt_user.list); 675db90681dSJ. Bruce Fields return conn; 676db90681dSJ. Bruce Fields } 677db90681dSJ. Bruce Fields 678328ead28SJ. Bruce Fields static void __nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 679328ead28SJ. Bruce Fields { 680328ead28SJ. Bruce Fields conn->cn_session = ses; 681328ead28SJ. Bruce Fields list_add(&conn->cn_persession, &ses->se_conns); 682328ead28SJ. Bruce Fields } 683328ead28SJ. Bruce Fields 684db90681dSJ. Bruce Fields static void nfsd4_hash_conn(struct nfsd4_conn *conn, struct nfsd4_session *ses) 685db90681dSJ. Bruce Fields { 686db90681dSJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 687c7662518SJ. Bruce Fields 688c7662518SJ. Bruce Fields spin_lock(&clp->cl_lock); 689328ead28SJ. Bruce Fields __nfsd4_hash_conn(conn, ses); 690c7662518SJ. Bruce Fields spin_unlock(&clp->cl_lock); 691db90681dSJ. Bruce Fields } 692c7662518SJ. Bruce Fields 69321b75b01SJ. Bruce Fields static int nfsd4_register_conn(struct nfsd4_conn *conn) 694db90681dSJ. Bruce Fields { 69519cf5c02SJ. Bruce Fields conn->cn_xpt_user.callback = nfsd4_conn_lost; 69621b75b01SJ. Bruce Fields return register_xpt_user(conn->cn_xprt, &conn->cn_xpt_user); 697db90681dSJ. Bruce Fields } 698db90681dSJ. Bruce Fields 6991d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn(struct svc_rqst *rqstp, struct nfsd4_session *ses, u32 dir) 700db90681dSJ. Bruce Fields { 701db90681dSJ. Bruce Fields struct nfsd4_conn *conn; 70221b75b01SJ. Bruce Fields int ret; 703db90681dSJ. Bruce Fields 7041d1bc8f2SJ. Bruce Fields conn = alloc_conn(rqstp, dir); 705db90681dSJ. Bruce Fields if (!conn) 706db90681dSJ. Bruce Fields return nfserr_jukebox; 707db90681dSJ. Bruce Fields nfsd4_hash_conn(conn, ses); 70821b75b01SJ. Bruce Fields ret = nfsd4_register_conn(conn); 70921b75b01SJ. Bruce Fields if (ret) 71021b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 71121b75b01SJ. Bruce Fields nfsd4_conn_lost(&conn->cn_xpt_user); 712c7662518SJ. Bruce Fields return nfs_ok; 713c7662518SJ. Bruce Fields } 714c7662518SJ. Bruce Fields 7151d1bc8f2SJ. Bruce Fields static __be32 nfsd4_new_conn_from_crses(struct svc_rqst *rqstp, struct nfsd4_session *ses) 7161d1bc8f2SJ. Bruce Fields { 7171d1bc8f2SJ. Bruce Fields u32 dir = NFS4_CDFC4_FORE; 7181d1bc8f2SJ. Bruce Fields 7191d1bc8f2SJ. Bruce Fields if (ses->se_flags & SESSION4_BACK_CHAN) 7201d1bc8f2SJ. Bruce Fields dir |= NFS4_CDFC4_BACK; 7211d1bc8f2SJ. Bruce Fields 7221d1bc8f2SJ. Bruce Fields return nfsd4_new_conn(rqstp, ses, dir); 7231d1bc8f2SJ. Bruce Fields } 7241d1bc8f2SJ. Bruce Fields 7251d1bc8f2SJ. Bruce Fields /* must be called under client_lock */ 72619cf5c02SJ. Bruce Fields static void nfsd4_del_conns(struct nfsd4_session *s) 727c7662518SJ. Bruce Fields { 72819cf5c02SJ. Bruce Fields struct nfs4_client *clp = s->se_client; 72919cf5c02SJ. Bruce Fields struct nfsd4_conn *c; 73019cf5c02SJ. Bruce Fields 73119cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 73219cf5c02SJ. Bruce Fields while (!list_empty(&s->se_conns)) { 73319cf5c02SJ. Bruce Fields c = list_first_entry(&s->se_conns, struct nfsd4_conn, cn_persession); 73419cf5c02SJ. Bruce Fields list_del_init(&c->cn_persession); 73519cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 73619cf5c02SJ. Bruce Fields 73719cf5c02SJ. Bruce Fields unregister_xpt_user(c->cn_xprt, &c->cn_xpt_user); 73819cf5c02SJ. Bruce Fields free_conn(c); 73919cf5c02SJ. Bruce Fields 74019cf5c02SJ. Bruce Fields spin_lock(&clp->cl_lock); 74119cf5c02SJ. Bruce Fields } 74219cf5c02SJ. Bruce Fields spin_unlock(&clp->cl_lock); 743c7662518SJ. Bruce Fields } 744c7662518SJ. Bruce Fields 745c7662518SJ. Bruce Fields void free_session(struct kref *kref) 746c7662518SJ. Bruce Fields { 747c7662518SJ. Bruce Fields struct nfsd4_session *ses; 748c7662518SJ. Bruce Fields int mem; 749c7662518SJ. Bruce Fields 750c7662518SJ. Bruce Fields ses = container_of(kref, struct nfsd4_session, se_ref); 75119cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 752c7662518SJ. Bruce Fields spin_lock(&nfsd_drc_lock); 753c7662518SJ. Bruce Fields mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); 754c7662518SJ. Bruce Fields nfsd_drc_mem_used -= mem; 755c7662518SJ. Bruce Fields spin_unlock(&nfsd_drc_lock); 756c7662518SJ. Bruce Fields free_session_slots(ses); 757c7662518SJ. Bruce Fields kfree(ses); 758c7662518SJ. Bruce Fields } 759c7662518SJ. Bruce Fields 760ac7c46f2SJ. Bruce Fields static struct nfsd4_session *alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, struct nfsd4_create_session *cses) 7615b6feee9SJ. Bruce Fields { 7625b6feee9SJ. Bruce Fields struct nfsd4_session *new; 7635b6feee9SJ. Bruce Fields struct nfsd4_channel_attrs *fchan = &cses->fore_channel; 7645b6feee9SJ. Bruce Fields int numslots, slotsize; 765c7662518SJ. Bruce Fields int status; 7665b6feee9SJ. Bruce Fields int idx; 7675b6feee9SJ. Bruce Fields 7685b6feee9SJ. Bruce Fields /* 7695b6feee9SJ. Bruce Fields * Note decreasing slot size below client's request may 7705b6feee9SJ. Bruce Fields * make it difficult for client to function correctly, whereas 7715b6feee9SJ. Bruce Fields * decreasing the number of slots will (just?) affect 7725b6feee9SJ. Bruce Fields * performance. When short on memory we therefore prefer to 7735b6feee9SJ. Bruce Fields * decrease number of slots instead of their size. 7745b6feee9SJ. Bruce Fields */ 7755b6feee9SJ. Bruce Fields slotsize = nfsd4_sanitize_slot_size(fchan->maxresp_cached); 7765b6feee9SJ. Bruce Fields numslots = nfsd4_get_drc_mem(slotsize, fchan->maxreqs); 777ced6dfe9SMi Jinlong if (numslots < 1) 778ced6dfe9SMi Jinlong return NULL; 7795b6feee9SJ. Bruce Fields 7805b6feee9SJ. Bruce Fields new = alloc_session(slotsize, numslots); 7815b6feee9SJ. Bruce Fields if (!new) { 7825b6feee9SJ. Bruce Fields nfsd4_put_drc_mem(slotsize, fchan->maxreqs); 783ac7c46f2SJ. Bruce Fields return NULL; 7845b6feee9SJ. Bruce Fields } 7855b6feee9SJ. Bruce Fields init_forechannel_attrs(&new->se_fchannel, fchan, numslots, slotsize); 786ec6b5d7bSAndy Adamson 787ec6b5d7bSAndy Adamson new->se_client = clp; 788ec6b5d7bSAndy Adamson gen_sessionid(new); 789ec6b5d7bSAndy Adamson 790c7662518SJ. Bruce Fields INIT_LIST_HEAD(&new->se_conns); 791c7662518SJ. Bruce Fields 792ac7c46f2SJ. Bruce Fields new->se_cb_seq_nr = 1; 793ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 7948b5ce5cdSJ. Bruce Fields new->se_cb_prog = cses->callback_prog; 795ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 7965b6feee9SJ. Bruce Fields idx = hash_sessionid(&new->se_sessionid); 7979089f1b4SBenny Halevy spin_lock(&client_lock); 798ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 7994c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 800ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 8014c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 8029089f1b4SBenny Halevy spin_unlock(&client_lock); 803ec6b5d7bSAndy Adamson 8041d1bc8f2SJ. Bruce Fields status = nfsd4_new_conn_from_crses(rqstp, new); 805ac7c46f2SJ. Bruce Fields /* whoops: benny points out, status is ignored! (err, or bogus) */ 806c7662518SJ. Bruce Fields if (status) { 807c7662518SJ. Bruce Fields free_session(&new->se_ref); 808ac7c46f2SJ. Bruce Fields return NULL; 809c7662518SJ. Bruce Fields } 810dcbeaa68SJ. Bruce Fields if (cses->flags & SESSION4_BACK_CHAN) { 811edd76786SJ. Bruce Fields struct sockaddr *sa = svc_addr(rqstp); 812dcbeaa68SJ. Bruce Fields /* 813dcbeaa68SJ. Bruce Fields * This is a little silly; with sessions there's no real 814dcbeaa68SJ. Bruce Fields * use for the callback address. Use the peer address 815dcbeaa68SJ. Bruce Fields * as a reasonable default for now, but consider fixing 816dcbeaa68SJ. Bruce Fields * the rpc client not to require an address in the 817dcbeaa68SJ. Bruce Fields * future: 818dcbeaa68SJ. Bruce Fields */ 819edd76786SJ. Bruce Fields rpc_copy_addr((struct sockaddr *)&clp->cl_cb_conn.cb_addr, sa); 820edd76786SJ. Bruce Fields clp->cl_cb_conn.cb_addrlen = svc_addr_len(sa); 821edd76786SJ. Bruce Fields } 822dcbeaa68SJ. Bruce Fields nfsd4_probe_callback(clp); 823ac7c46f2SJ. Bruce Fields return new; 824ec6b5d7bSAndy Adamson } 825ec6b5d7bSAndy Adamson 8269089f1b4SBenny Halevy /* caller must hold client_lock */ 8275282fd72SMarc Eshel static struct nfsd4_session * 8285282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 8295282fd72SMarc Eshel { 8305282fd72SMarc Eshel struct nfsd4_session *elem; 8315282fd72SMarc Eshel int idx; 8325282fd72SMarc Eshel 8335282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 8345282fd72SMarc Eshel idx = hash_sessionid(sessionid); 8355282fd72SMarc Eshel /* Search in the appropriate list */ 8365282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 8375282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 8385282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 8395282fd72SMarc Eshel return elem; 8405282fd72SMarc Eshel } 8415282fd72SMarc Eshel } 8425282fd72SMarc Eshel 8435282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 8445282fd72SMarc Eshel return NULL; 8455282fd72SMarc Eshel } 8465282fd72SMarc Eshel 8479089f1b4SBenny Halevy /* caller must hold client_lock */ 8487116ed6bSAndy Adamson static void 8495282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 8507116ed6bSAndy Adamson { 8517116ed6bSAndy Adamson list_del(&ses->se_hash); 8524c649378SJ. Bruce Fields spin_lock(&ses->se_client->cl_lock); 8537116ed6bSAndy Adamson list_del(&ses->se_perclnt); 8544c649378SJ. Bruce Fields spin_unlock(&ses->se_client->cl_lock); 8555282fd72SMarc Eshel } 8565282fd72SMarc Eshel 85736acb66bSBenny Halevy /* must be called under the client_lock */ 8581da177e4SLinus Torvalds static inline void 85936acb66bSBenny Halevy renew_client_locked(struct nfs4_client *clp) 8601da177e4SLinus Torvalds { 86107cd4909SBenny Halevy if (is_client_expired(clp)) { 86207cd4909SBenny Halevy dprintk("%s: client (clientid %08x/%08x) already expired\n", 86307cd4909SBenny Halevy __func__, 86407cd4909SBenny Halevy clp->cl_clientid.cl_boot, 86507cd4909SBenny Halevy clp->cl_clientid.cl_id); 86607cd4909SBenny Halevy return; 86707cd4909SBenny Halevy } 86807cd4909SBenny Halevy 8691da177e4SLinus Torvalds /* 8701da177e4SLinus Torvalds * Move client to the end to the LRU list. 8711da177e4SLinus Torvalds */ 8721da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 8731da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 8741da177e4SLinus Torvalds clp->cl_clientid.cl_id); 8751da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 8761da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8771da177e4SLinus Torvalds } 8781da177e4SLinus Torvalds 87936acb66bSBenny Halevy static inline void 88036acb66bSBenny Halevy renew_client(struct nfs4_client *clp) 88136acb66bSBenny Halevy { 88236acb66bSBenny Halevy spin_lock(&client_lock); 88336acb66bSBenny Halevy renew_client_locked(clp); 88436acb66bSBenny Halevy spin_unlock(&client_lock); 88536acb66bSBenny Halevy } 88636acb66bSBenny Halevy 8871da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 8881da177e4SLinus Torvalds static int 8891da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 8901da177e4SLinus Torvalds { 8911da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 8921da177e4SLinus Torvalds return 0; 89360adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 89460adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 8951da177e4SLinus Torvalds return 1; 8961da177e4SLinus Torvalds } 8971da177e4SLinus Torvalds 8981da177e4SLinus Torvalds /* 8991da177e4SLinus Torvalds * XXX Should we use a slab cache ? 9001da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 9011da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 9021da177e4SLinus Torvalds */ 90335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 9041da177e4SLinus Torvalds { 9051da177e4SLinus Torvalds struct nfs4_client *clp; 9061da177e4SLinus Torvalds 90735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 90835bba9a3SJ. Bruce Fields if (clp == NULL) 90935bba9a3SJ. Bruce Fields return NULL; 91035bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 91135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 91235bba9a3SJ. Bruce Fields kfree(clp); 91335bba9a3SJ. Bruce Fields return NULL; 91435bba9a3SJ. Bruce Fields } 9151da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 9161da177e4SLinus Torvalds clp->cl_name.len = name.len; 9171da177e4SLinus Torvalds return clp; 9181da177e4SLinus Torvalds } 9191da177e4SLinus Torvalds 9201da177e4SLinus Torvalds static inline void 9211da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 9221da177e4SLinus Torvalds { 923792c95ddSJ. Bruce Fields while (!list_empty(&clp->cl_sessions)) { 924792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 925792c95ddSJ. Bruce Fields ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 926792c95ddSJ. Bruce Fields se_perclnt); 927792c95ddSJ. Bruce Fields list_del(&ses->se_perclnt); 928792c95ddSJ. Bruce Fields nfsd4_put_session(ses); 929792c95ddSJ. Bruce Fields } 9301da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 9311da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 93268e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 9331da177e4SLinus Torvalds kfree(clp->cl_name.data); 9341da177e4SLinus Torvalds kfree(clp); 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds 937d7682988SBenny Halevy void 938d7682988SBenny Halevy release_session_client(struct nfsd4_session *session) 939d7682988SBenny Halevy { 940d7682988SBenny Halevy struct nfs4_client *clp = session->se_client; 941d7682988SBenny Halevy 942d7682988SBenny Halevy if (!atomic_dec_and_lock(&clp->cl_refcount, &client_lock)) 943d7682988SBenny Halevy return; 944d7682988SBenny Halevy if (is_client_expired(clp)) { 945d7682988SBenny Halevy free_client(clp); 946d7682988SBenny Halevy session->se_client = NULL; 947d7682988SBenny Halevy } else 948d7682988SBenny Halevy renew_client_locked(clp); 949d7682988SBenny Halevy spin_unlock(&client_lock); 950d7682988SBenny Halevy } 951d7682988SBenny Halevy 95284d38ac9SBenny Halevy /* must be called under the client_lock */ 95384d38ac9SBenny Halevy static inline void 95484d38ac9SBenny Halevy unhash_client_locked(struct nfs4_client *clp) 95584d38ac9SBenny Halevy { 956792c95ddSJ. Bruce Fields struct nfsd4_session *ses; 957792c95ddSJ. Bruce Fields 95807cd4909SBenny Halevy mark_client_expired(clp); 95984d38ac9SBenny Halevy list_del(&clp->cl_lru); 9604c649378SJ. Bruce Fields spin_lock(&clp->cl_lock); 961792c95ddSJ. Bruce Fields list_for_each_entry(ses, &clp->cl_sessions, se_perclnt) 962792c95ddSJ. Bruce Fields list_del_init(&ses->se_hash); 9634c649378SJ. Bruce Fields spin_unlock(&clp->cl_lock); 96484d38ac9SBenny Halevy } 96584d38ac9SBenny Halevy 9661da177e4SLinus Torvalds static void 9671da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 9681da177e4SLinus Torvalds { 969fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 9701da177e4SLinus Torvalds struct nfs4_delegation *dp; 9711da177e4SLinus Torvalds struct list_head reaplist; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 9741da177e4SLinus Torvalds spin_lock(&recall_lock); 975ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 976ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 977ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 9781da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 9791da177e4SLinus Torvalds } 9801da177e4SLinus Torvalds spin_unlock(&recall_lock); 9811da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 9821da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 9831da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 9841da177e4SLinus Torvalds unhash_delegation(dp); 9851da177e4SLinus Torvalds } 986ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 987fe0750e5SJ. Bruce Fields oo = list_entry(clp->cl_openowners.next, struct nfs4_openowner, oo_perclient); 988fe0750e5SJ. Bruce Fields release_openowner(oo); 9891da177e4SLinus Torvalds } 9906ff8da08SJ. Bruce Fields nfsd4_shutdown_callback(clp); 9912bf23875SJ. Bruce Fields if (clp->cl_cb_conn.cb_xprt) 9922bf23875SJ. Bruce Fields svc_xprt_put(clp->cl_cb_conn.cb_xprt); 99384d38ac9SBenny Halevy list_del(&clp->cl_idhash); 99484d38ac9SBenny Halevy list_del(&clp->cl_strhash); 99584d38ac9SBenny Halevy spin_lock(&client_lock); 99684d38ac9SBenny Halevy unhash_client_locked(clp); 99746583e25SBenny Halevy if (atomic_read(&clp->cl_refcount) == 0) 998b12a05cbSJ. Bruce Fields free_client(clp); 99946583e25SBenny Halevy spin_unlock(&client_lock); 10001da177e4SLinus Torvalds } 10011da177e4SLinus Torvalds 100235bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 100335bba9a3SJ. Bruce Fields { 100435bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 100535bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 10061da177e4SLinus Torvalds } 10071da177e4SLinus Torvalds 100835bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 100935bba9a3SJ. Bruce Fields { 10101da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 10111da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds 101435bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 101535bba9a3SJ. Bruce Fields { 10161da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 10171da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 10181da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 10191da177e4SLinus Torvalds get_group_info(target->cr_group_info); 10201da177e4SLinus Torvalds } 10211da177e4SLinus Torvalds 102235bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 1023599e0a22SJ. Bruce Fields { 1024a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 10251da177e4SLinus Torvalds } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static int 1028599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 1029599e0a22SJ. Bruce Fields { 1030599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 10311da177e4SLinus Torvalds } 10321da177e4SLinus Torvalds 10331da177e4SLinus Torvalds static int 1034599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 1035599e0a22SJ. Bruce Fields { 1036599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds /* XXX what about NGROUP */ 10401da177e4SLinus Torvalds static int 1041599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 1042599e0a22SJ. Bruce Fields { 1043599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 10441da177e4SLinus Torvalds } 10451da177e4SLinus Torvalds 10465ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 10475ec7b46cSJ. Bruce Fields { 10485ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 10495ec7b46cSJ. Bruce Fields 10501da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 10511da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 1054deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 1055deda2faaSJ. Bruce Fields { 1056deda2faaSJ. Bruce Fields static u32 i; 10571da177e4SLinus Torvalds u32 *p; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 1060deda2faaSJ. Bruce Fields *p++ = get_seconds(); 1061deda2faaSJ. Bruce Fields *p++ = i++; 10621da177e4SLinus Torvalds } 10631da177e4SLinus Torvalds 1064b09333c4SRicardo Labiaga static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, 1065b09333c4SRicardo Labiaga struct svc_rqst *rqstp, nfs4_verifier *verf) 1066b09333c4SRicardo Labiaga { 1067b09333c4SRicardo Labiaga struct nfs4_client *clp; 1068b09333c4SRicardo Labiaga struct sockaddr *sa = svc_addr(rqstp); 1069b09333c4SRicardo Labiaga char *princ; 1070b09333c4SRicardo Labiaga 1071b09333c4SRicardo Labiaga clp = alloc_client(name); 1072b09333c4SRicardo Labiaga if (clp == NULL) 1073b09333c4SRicardo Labiaga return NULL; 1074b09333c4SRicardo Labiaga 1075792c95ddSJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_sessions); 1076792c95ddSJ. Bruce Fields 1077b09333c4SRicardo Labiaga princ = svc_gss_principal(rqstp); 1078b09333c4SRicardo Labiaga if (princ) { 1079b09333c4SRicardo Labiaga clp->cl_principal = kstrdup(princ, GFP_KERNEL); 1080b09333c4SRicardo Labiaga if (clp->cl_principal == NULL) { 1081b09333c4SRicardo Labiaga free_client(clp); 1082b09333c4SRicardo Labiaga return NULL; 1083b09333c4SRicardo Labiaga } 1084b09333c4SRicardo Labiaga } 1085b09333c4SRicardo Labiaga 1086b09333c4SRicardo Labiaga memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 108746583e25SBenny Halevy atomic_set(&clp->cl_refcount, 0); 108877a3569dSJ. Bruce Fields clp->cl_cb_state = NFSD4_CB_UNKNOWN; 1089b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_idhash); 1090b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_strhash); 1091b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_openowners); 1092b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_delegations); 1093b09333c4SRicardo Labiaga INIT_LIST_HEAD(&clp->cl_lru); 10945ce8ba25SJ. Bruce Fields INIT_LIST_HEAD(&clp->cl_callbacks); 10956ff8da08SJ. Bruce Fields spin_lock_init(&clp->cl_lock); 1096cee277d9SJ. Bruce Fields INIT_WORK(&clp->cl_cb_null.cb_work, nfsd4_do_callback_rpc); 109707cd4909SBenny Halevy clp->cl_time = get_seconds(); 1098b09333c4SRicardo Labiaga clear_bit(0, &clp->cl_cb_slot_busy); 1099b09333c4SRicardo Labiaga rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); 1100b09333c4SRicardo Labiaga copy_verf(clp, verf); 1101b09333c4SRicardo Labiaga rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); 1102b09333c4SRicardo Labiaga clp->cl_flavor = rqstp->rq_flavor; 1103b09333c4SRicardo Labiaga copy_cred(&clp->cl_cred, &rqstp->rq_cred); 1104b09333c4SRicardo Labiaga gen_confirm(clp); 1105edd76786SJ. Bruce Fields clp->cl_cb_session = NULL; 1106b09333c4SRicardo Labiaga return clp; 1107b09333c4SRicardo Labiaga } 1108b09333c4SRicardo Labiaga 110935bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 111035bba9a3SJ. Bruce Fields { 11111da177e4SLinus Torvalds if (name.len == 0) 11121da177e4SLinus Torvalds return 0; 11131da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 11142fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 11151da177e4SLinus Torvalds return 0; 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds return 1; 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 1120fd39ca9aSNeilBrown static void 11211da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds unsigned int idhashval; 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 11261da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11271da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 112836acb66bSBenny Halevy renew_client(clp); 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 1131fd39ca9aSNeilBrown static void 11321da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 11331da177e4SLinus Torvalds { 11341da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 11351da177e4SLinus Torvalds unsigned int strhashval; 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 1138f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 1139a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 1140328efbabSBenny Halevy list_move(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 11411da177e4SLinus Torvalds renew_client(clp); 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds static struct nfs4_client * 11451da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 11461da177e4SLinus Torvalds { 11471da177e4SLinus Torvalds struct nfs4_client *clp; 11481da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11491da177e4SLinus Torvalds 11501da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 1151599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11521da177e4SLinus Torvalds return clp; 11531da177e4SLinus Torvalds } 11541da177e4SLinus Torvalds return NULL; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds static struct nfs4_client * 11581da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds struct nfs4_client *clp; 11611da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 1164599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 11651da177e4SLinus Torvalds return clp; 11661da177e4SLinus Torvalds } 11671da177e4SLinus Torvalds return NULL; 11681da177e4SLinus Torvalds } 11691da177e4SLinus Torvalds 11706e5f15c9SJ. Bruce Fields static bool clp_used_exchangeid(struct nfs4_client *clp) 1171a1bcecd2SAndy Adamson { 11726e5f15c9SJ. Bruce Fields return clp->cl_exchange_flags != 0; 1173a1bcecd2SAndy Adamson } 1174a1bcecd2SAndy Adamson 117528ce6054SNeilBrown static struct nfs4_client * 1176e203d506SJ. Bruce Fields find_confirmed_client_by_str(const char *dname, unsigned int hashval) 117728ce6054SNeilBrown { 117828ce6054SNeilBrown struct nfs4_client *clp; 117928ce6054SNeilBrown 118028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 1181e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 118228ce6054SNeilBrown return clp; 118328ce6054SNeilBrown } 118428ce6054SNeilBrown return NULL; 118528ce6054SNeilBrown } 118628ce6054SNeilBrown 118728ce6054SNeilBrown static struct nfs4_client * 1188e203d506SJ. Bruce Fields find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 118928ce6054SNeilBrown { 119028ce6054SNeilBrown struct nfs4_client *clp; 119128ce6054SNeilBrown 119228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 1193e203d506SJ. Bruce Fields if (same_name(clp->cl_recdir, dname)) 119428ce6054SNeilBrown return clp; 119528ce6054SNeilBrown } 119628ce6054SNeilBrown return NULL; 119728ce6054SNeilBrown } 119828ce6054SNeilBrown 11996f3d772fSTakuma Umeya static void rpc_svcaddr2sockaddr(struct sockaddr *sa, unsigned short family, union svc_addr_u *svcaddr) 12006f3d772fSTakuma Umeya { 12016f3d772fSTakuma Umeya switch (family) { 12026f3d772fSTakuma Umeya case AF_INET: 12036f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_family = AF_INET; 12046f3d772fSTakuma Umeya ((struct sockaddr_in *)sa)->sin_addr = svcaddr->addr; 12056f3d772fSTakuma Umeya return; 12066f3d772fSTakuma Umeya case AF_INET6: 12076f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_family = AF_INET6; 12086f3d772fSTakuma Umeya ((struct sockaddr_in6 *)sa)->sin6_addr = svcaddr->addr6; 12096f3d772fSTakuma Umeya return; 12106f3d772fSTakuma Umeya } 12116f3d772fSTakuma Umeya } 12126f3d772fSTakuma Umeya 1213fd39ca9aSNeilBrown static void 12146f3d772fSTakuma Umeya gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, struct svc_rqst *rqstp) 12151da177e4SLinus Torvalds { 121607263f1eSJ. Bruce Fields struct nfs4_cb_conn *conn = &clp->cl_cb_conn; 12176f3d772fSTakuma Umeya struct sockaddr *sa = svc_addr(rqstp); 12186f3d772fSTakuma Umeya u32 scopeid = rpc_get_scope_id(sa); 12197077ecbaSJeff Layton unsigned short expected_family; 12201da177e4SLinus Torvalds 12217077ecbaSJeff Layton /* Currently, we only support tcp and tcp6 for the callback channel */ 12227077ecbaSJeff Layton if (se->se_callback_netid_len == 3 && 12237077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp", 3)) 12247077ecbaSJeff Layton expected_family = AF_INET; 12257077ecbaSJeff Layton else if (se->se_callback_netid_len == 4 && 12267077ecbaSJeff Layton !memcmp(se->se_callback_netid_val, "tcp6", 4)) 12277077ecbaSJeff Layton expected_family = AF_INET6; 12287077ecbaSJeff Layton else 12291da177e4SLinus Torvalds goto out_err; 12301da177e4SLinus Torvalds 123107263f1eSJ. Bruce Fields conn->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, 1232aa9a4ec7SJeff Layton se->se_callback_addr_len, 123307263f1eSJ. Bruce Fields (struct sockaddr *)&conn->cb_addr, 123407263f1eSJ. Bruce Fields sizeof(conn->cb_addr)); 1235aa9a4ec7SJeff Layton 123607263f1eSJ. Bruce Fields if (!conn->cb_addrlen || conn->cb_addr.ss_family != expected_family) 12371da177e4SLinus Torvalds goto out_err; 1238aa9a4ec7SJeff Layton 123907263f1eSJ. Bruce Fields if (conn->cb_addr.ss_family == AF_INET6) 124007263f1eSJ. Bruce Fields ((struct sockaddr_in6 *)&conn->cb_addr)->sin6_scope_id = scopeid; 1241fbf4665fSJeff Layton 124207263f1eSJ. Bruce Fields conn->cb_prog = se->se_callback_prog; 124307263f1eSJ. Bruce Fields conn->cb_ident = se->se_callback_ident; 12446f3d772fSTakuma Umeya rpc_svcaddr2sockaddr((struct sockaddr *)&conn->cb_saddr, expected_family, &rqstp->rq_daddr); 12451da177e4SLinus Torvalds return; 12461da177e4SLinus Torvalds out_err: 124707263f1eSJ. Bruce Fields conn->cb_addr.ss_family = AF_UNSPEC; 124807263f1eSJ. Bruce Fields conn->cb_addrlen = 0; 1249849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 12501da177e4SLinus Torvalds "will not receive delegations\n", 12511da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvalds return; 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds 1256074fe897SAndy Adamson /* 1257557ce264SAndy Adamson * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. 1258074fe897SAndy Adamson */ 1259074fe897SAndy Adamson void 1260074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1261074fe897SAndy Adamson { 1262557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1263557ce264SAndy Adamson unsigned int base; 1264074fe897SAndy Adamson 1265557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1266074fe897SAndy Adamson 1267557ce264SAndy Adamson slot->sl_opcnt = resp->opcnt; 1268557ce264SAndy Adamson slot->sl_status = resp->cstate.status; 1269bf864a31SAndy Adamson 1270bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1271557ce264SAndy Adamson slot->sl_datalen = 0; 1272bf864a31SAndy Adamson return; 1273bf864a31SAndy Adamson } 1274557ce264SAndy Adamson slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; 1275557ce264SAndy Adamson base = (char *)resp->cstate.datap - 1276557ce264SAndy Adamson (char *)resp->xbuf->head[0].iov_base; 1277557ce264SAndy Adamson if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, 1278557ce264SAndy Adamson slot->sl_datalen)) 1279557ce264SAndy Adamson WARN("%s: sessions DRC could not cache compound\n", __func__); 1280557ce264SAndy Adamson return; 1281074fe897SAndy Adamson } 1282074fe897SAndy Adamson 1283074fe897SAndy Adamson /* 1284abfabf8cSAndy Adamson * Encode the replay sequence operation from the slot values. 1285abfabf8cSAndy Adamson * If cachethis is FALSE encode the uncached rep error on the next 1286abfabf8cSAndy Adamson * operation which sets resp->p and increments resp->opcnt for 1287abfabf8cSAndy Adamson * nfs4svc_encode_compoundres. 1288abfabf8cSAndy Adamson * 1289074fe897SAndy Adamson */ 1290abfabf8cSAndy Adamson static __be32 1291abfabf8cSAndy Adamson nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, 1292abfabf8cSAndy Adamson struct nfsd4_compoundres *resp) 1293074fe897SAndy Adamson { 1294abfabf8cSAndy Adamson struct nfsd4_op *op; 1295abfabf8cSAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1296074fe897SAndy Adamson 1297abfabf8cSAndy Adamson dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, 1298557ce264SAndy Adamson resp->opcnt, resp->cstate.slot->sl_cachethis); 1299abfabf8cSAndy Adamson 1300abfabf8cSAndy Adamson /* Encode the replayed sequence operation */ 1301abfabf8cSAndy Adamson op = &args->ops[resp->opcnt - 1]; 1302abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1303abfabf8cSAndy Adamson 1304abfabf8cSAndy Adamson /* Return nfserr_retry_uncached_rep in next operation. */ 1305557ce264SAndy Adamson if (args->opcnt > 1 && slot->sl_cachethis == 0) { 1306abfabf8cSAndy Adamson op = &args->ops[resp->opcnt++]; 1307abfabf8cSAndy Adamson op->status = nfserr_retry_uncached_rep; 1308abfabf8cSAndy Adamson nfsd4_encode_operation(resp, op); 1309074fe897SAndy Adamson } 1310abfabf8cSAndy Adamson return op->status; 1311074fe897SAndy Adamson } 1312074fe897SAndy Adamson 1313074fe897SAndy Adamson /* 1314557ce264SAndy Adamson * The sequence operation is not cached because we can use the slot and 1315557ce264SAndy Adamson * session values. 1316074fe897SAndy Adamson */ 1317074fe897SAndy Adamson __be32 1318bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1319bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1320074fe897SAndy Adamson { 1321557ce264SAndy Adamson struct nfsd4_slot *slot = resp->cstate.slot; 1322074fe897SAndy Adamson __be32 status; 1323074fe897SAndy Adamson 1324557ce264SAndy Adamson dprintk("--> %s slot %p\n", __func__, slot); 1325074fe897SAndy Adamson 1326abfabf8cSAndy Adamson /* Either returns 0 or nfserr_retry_uncached */ 1327abfabf8cSAndy Adamson status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); 1328abfabf8cSAndy Adamson if (status == nfserr_retry_uncached_rep) 1329abfabf8cSAndy Adamson return status; 1330074fe897SAndy Adamson 1331557ce264SAndy Adamson /* The sequence operation has been encoded, cstate->datap set. */ 1332557ce264SAndy Adamson memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); 1333074fe897SAndy Adamson 1334557ce264SAndy Adamson resp->opcnt = slot->sl_opcnt; 1335557ce264SAndy Adamson resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); 1336557ce264SAndy Adamson status = slot->sl_status; 1337074fe897SAndy Adamson 1338074fe897SAndy Adamson return status; 1339074fe897SAndy Adamson } 1340074fe897SAndy Adamson 13410733d213SAndy Adamson /* 13420733d213SAndy Adamson * Set the exchange_id flags returned by the server. 13430733d213SAndy Adamson */ 13440733d213SAndy Adamson static void 13450733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 13460733d213SAndy Adamson { 13470733d213SAndy Adamson /* pNFS is not supported */ 13480733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 13490733d213SAndy Adamson 13500733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 13510733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 13520733d213SAndy Adamson 13530733d213SAndy Adamson /* set the wire flags to return to client. */ 13540733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 13550733d213SAndy Adamson } 13560733d213SAndy Adamson 1357b37ad28bSAl Viro __be32 1358069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1359069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1360069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1361069b6ad4SAndy Adamson { 13620733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 13630733d213SAndy Adamson int status; 13640733d213SAndy Adamson unsigned int strhashval; 13650733d213SAndy Adamson char dname[HEXDIR_LEN]; 1366363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 13670733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 1368363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 13690733d213SAndy Adamson 1370363168b4SJeff Layton rpc_ntop(sa, addr_str, sizeof(addr_str)); 13710733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 1372363168b4SJeff Layton "ip_addr=%s flags %x, spa_how %d\n", 13730733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 1374363168b4SJeff Layton addr_str, exid->flags, exid->spa_how); 13750733d213SAndy Adamson 13760733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 13770733d213SAndy Adamson return nfserr_inval; 13780733d213SAndy Adamson 13790733d213SAndy Adamson /* Currently only support SP4_NONE */ 13800733d213SAndy Adamson switch (exid->spa_how) { 13810733d213SAndy Adamson case SP4_NONE: 13820733d213SAndy Adamson break; 13830733d213SAndy Adamson case SP4_SSV: 1384044bc1d4SJ. Bruce Fields return nfserr_serverfault; 13850733d213SAndy Adamson default: 13860733d213SAndy Adamson BUG(); /* checked by xdr code */ 13870733d213SAndy Adamson case SP4_MACH_CRED: 13880733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 13890733d213SAndy Adamson } 13900733d213SAndy Adamson 13910733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 13920733d213SAndy Adamson 13930733d213SAndy Adamson if (status) 13940733d213SAndy Adamson goto error; 13950733d213SAndy Adamson 13960733d213SAndy Adamson strhashval = clientstr_hashval(dname); 13970733d213SAndy Adamson 13980733d213SAndy Adamson nfs4_lock_state(); 13990733d213SAndy Adamson status = nfs_ok; 14000733d213SAndy Adamson 1401e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 14020733d213SAndy Adamson if (conf) { 1403e203d506SJ. Bruce Fields if (!clp_used_exchangeid(conf)) { 1404e203d506SJ. Bruce Fields status = nfserr_clid_inuse; /* XXX: ? */ 1405e203d506SJ. Bruce Fields goto out; 1406e203d506SJ. Bruce Fields } 14070733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 14080733d213SAndy Adamson /* 18.35.4 case 8 */ 14090733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14100733d213SAndy Adamson status = nfserr_not_same; 14110733d213SAndy Adamson goto out; 14120733d213SAndy Adamson } 14130733d213SAndy Adamson /* Client reboot: destroy old state */ 14140733d213SAndy Adamson expire_client(conf); 14150733d213SAndy Adamson goto out_new; 14160733d213SAndy Adamson } 14170733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 14180733d213SAndy Adamson /* 18.35.4 case 9 */ 14190733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14200733d213SAndy Adamson status = nfserr_perm; 14210733d213SAndy Adamson goto out; 14220733d213SAndy Adamson } 14230733d213SAndy Adamson expire_client(conf); 14240733d213SAndy Adamson goto out_new; 14250733d213SAndy Adamson } 14260733d213SAndy Adamson /* 14270733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 14280733d213SAndy Adamson * confirmed client id (18.35.3). 14290733d213SAndy Adamson */ 14300733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 14310733d213SAndy Adamson 14320733d213SAndy Adamson /* 14330733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 14340733d213SAndy Adamson * Leave confirmed record intact and return same result. 14350733d213SAndy Adamson */ 14360733d213SAndy Adamson copy_verf(conf, &verf); 14370733d213SAndy Adamson new = conf; 14380733d213SAndy Adamson goto out_copy; 14396ddbbbfeSMike Sager } 14406ddbbbfeSMike Sager 14410733d213SAndy Adamson /* 18.35.4 case 7 */ 14420733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 14430733d213SAndy Adamson status = nfserr_noent; 14440733d213SAndy Adamson goto out; 14450733d213SAndy Adamson } 14460733d213SAndy Adamson 1447e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 14480733d213SAndy Adamson if (unconf) { 14490733d213SAndy Adamson /* 14500733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 14510733d213SAndy Adamson * a new unconfirmed record should be generated regardless 14520733d213SAndy Adamson * of whether any properties have changed. 14530733d213SAndy Adamson */ 14540733d213SAndy Adamson expire_client(unconf); 14550733d213SAndy Adamson } 14560733d213SAndy Adamson 14570733d213SAndy Adamson out_new: 14580733d213SAndy Adamson /* Normal case */ 1459b09333c4SRicardo Labiaga new = create_client(exid->clname, dname, rqstp, &verf); 14600733d213SAndy Adamson if (new == NULL) { 14614731030dSJ. Bruce Fields status = nfserr_jukebox; 14620733d213SAndy Adamson goto out; 14630733d213SAndy Adamson } 14640733d213SAndy Adamson 14650733d213SAndy Adamson gen_clid(new); 14660733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 14670733d213SAndy Adamson out_copy: 14680733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 14690733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 14700733d213SAndy Adamson 147138eb76a5SAndy Adamson exid->seqid = 1; 14720733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 14730733d213SAndy Adamson 14740733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 147549557cc7SAndy Adamson new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); 14760733d213SAndy Adamson status = nfs_ok; 14770733d213SAndy Adamson 14780733d213SAndy Adamson out: 14790733d213SAndy Adamson nfs4_unlock_state(); 14800733d213SAndy Adamson error: 14810733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 14820733d213SAndy Adamson return status; 1483069b6ad4SAndy Adamson } 1484069b6ad4SAndy Adamson 1485b85d4c01SBenny Halevy static int 148688e588d5SAndy Adamson check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) 1487b85d4c01SBenny Halevy { 148888e588d5SAndy Adamson dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, 148988e588d5SAndy Adamson slot_seqid); 1490b85d4c01SBenny Halevy 1491b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 149288e588d5SAndy Adamson if (slot_inuse) { 149388e588d5SAndy Adamson if (seqid == slot_seqid) 1494b85d4c01SBenny Halevy return nfserr_jukebox; 1495b85d4c01SBenny Halevy else 1496b85d4c01SBenny Halevy return nfserr_seq_misordered; 1497b85d4c01SBenny Halevy } 1498b85d4c01SBenny Halevy /* Normal */ 149988e588d5SAndy Adamson if (likely(seqid == slot_seqid + 1)) 1500b85d4c01SBenny Halevy return nfs_ok; 1501b85d4c01SBenny Halevy /* Replay */ 150288e588d5SAndy Adamson if (seqid == slot_seqid) 1503b85d4c01SBenny Halevy return nfserr_replay_cache; 1504b85d4c01SBenny Halevy /* Wraparound */ 150588e588d5SAndy Adamson if (seqid == 1 && (slot_seqid + 1) == 0) 1506b85d4c01SBenny Halevy return nfs_ok; 1507b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1508b85d4c01SBenny Halevy return nfserr_seq_misordered; 1509b85d4c01SBenny Halevy } 1510b85d4c01SBenny Halevy 151149557cc7SAndy Adamson /* 151249557cc7SAndy Adamson * Cache the create session result into the create session single DRC 151349557cc7SAndy Adamson * slot cache by saving the xdr structure. sl_seqid has been set. 151449557cc7SAndy Adamson * Do this for solo or embedded create session operations. 151549557cc7SAndy Adamson */ 151649557cc7SAndy Adamson static void 151749557cc7SAndy Adamson nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, 151849557cc7SAndy Adamson struct nfsd4_clid_slot *slot, int nfserr) 151949557cc7SAndy Adamson { 152049557cc7SAndy Adamson slot->sl_status = nfserr; 152149557cc7SAndy Adamson memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); 152249557cc7SAndy Adamson } 152349557cc7SAndy Adamson 152449557cc7SAndy Adamson static __be32 152549557cc7SAndy Adamson nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, 152649557cc7SAndy Adamson struct nfsd4_clid_slot *slot) 152749557cc7SAndy Adamson { 152849557cc7SAndy Adamson memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); 152949557cc7SAndy Adamson return slot->sl_status; 153049557cc7SAndy Adamson } 153149557cc7SAndy Adamson 15321b74c25bSMi Jinlong #define NFSD_MIN_REQ_HDR_SEQ_SZ ((\ 15331b74c25bSMi Jinlong 2 * 2 + /* credential,verifier: AUTH_NULL, length 0 */ \ 15341b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15351b74c25bSMi Jinlong 3 + /* version, opcount, opcode */ \ 15361b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15371b74c25bSMi Jinlong /* seqid, slotID, slotID, cache */ \ 15381b74c25bSMi Jinlong 4 ) * sizeof(__be32)) 15391b74c25bSMi Jinlong 15401b74c25bSMi Jinlong #define NFSD_MIN_RESP_HDR_SEQ_SZ ((\ 15411b74c25bSMi Jinlong 2 + /* verifier: AUTH_NULL, length 0 */\ 15421b74c25bSMi Jinlong 1 + /* status */ \ 15431b74c25bSMi Jinlong 1 + /* MIN tag is length with zero, only length */ \ 15441b74c25bSMi Jinlong 3 + /* opcount, opcode, opstatus*/ \ 15451b74c25bSMi Jinlong XDR_QUADLEN(NFS4_MAX_SESSIONID_LEN) + \ 15461b74c25bSMi Jinlong /* seqid, slotID, slotID, slotID, status */ \ 15471b74c25bSMi Jinlong 5 ) * sizeof(__be32)) 15481b74c25bSMi Jinlong 15491b74c25bSMi Jinlong static __be32 check_forechannel_attrs(struct nfsd4_channel_attrs fchannel) 15501b74c25bSMi Jinlong { 15511b74c25bSMi Jinlong return fchannel.maxreq_sz < NFSD_MIN_REQ_HDR_SEQ_SZ 15521b74c25bSMi Jinlong || fchannel.maxresp_sz < NFSD_MIN_RESP_HDR_SEQ_SZ; 15531b74c25bSMi Jinlong } 15541b74c25bSMi Jinlong 1555069b6ad4SAndy Adamson __be32 1556069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1557069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1558069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1559069b6ad4SAndy Adamson { 1560363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 1561ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 1562ac7c46f2SJ. Bruce Fields struct nfsd4_session *new; 156349557cc7SAndy Adamson struct nfsd4_clid_slot *cs_slot = NULL; 156486c3e16cSJ. Bruce Fields bool confirm_me = false; 1565ec6b5d7bSAndy Adamson int status = 0; 1566ec6b5d7bSAndy Adamson 1567a62573dcSMi Jinlong if (cr_ses->flags & ~SESSION4_FLAG_MASK_A) 1568a62573dcSMi Jinlong return nfserr_inval; 1569a62573dcSMi Jinlong 1570ec6b5d7bSAndy Adamson nfs4_lock_state(); 1571ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1572ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1573ec6b5d7bSAndy Adamson 1574ec6b5d7bSAndy Adamson if (conf) { 157549557cc7SAndy Adamson cs_slot = &conf->cl_cs_slot; 157649557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 157738eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1578ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 157949557cc7SAndy Adamson cs_slot->sl_seqid); 158038eb76a5SAndy Adamson /* Return the cached reply status */ 158149557cc7SAndy Adamson status = nfsd4_replay_create_session(cr_ses, cs_slot); 158238eb76a5SAndy Adamson goto out; 158349557cc7SAndy Adamson } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { 1584ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1585ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1586ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 158749557cc7SAndy Adamson cs_slot->sl_seqid, cr_ses->seqid); 1588ec6b5d7bSAndy Adamson goto out; 1589ec6b5d7bSAndy Adamson } 1590ec6b5d7bSAndy Adamson } else if (unconf) { 1591ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1592363168b4SJeff Layton !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { 1593ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1594ec6b5d7bSAndy Adamson goto out; 1595ec6b5d7bSAndy Adamson } 1596ec6b5d7bSAndy Adamson 159749557cc7SAndy Adamson cs_slot = &unconf->cl_cs_slot; 159849557cc7SAndy Adamson status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); 159938eb76a5SAndy Adamson if (status) { 160038eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1601ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1602cd5b8144SJ. Bruce Fields goto out; 1603ec6b5d7bSAndy Adamson } 1604ec6b5d7bSAndy Adamson 160586c3e16cSJ. Bruce Fields confirm_me = true; 1606ec6b5d7bSAndy Adamson conf = unconf; 1607ec6b5d7bSAndy Adamson } else { 1608ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1609ec6b5d7bSAndy Adamson goto out; 1610ec6b5d7bSAndy Adamson } 1611ec6b5d7bSAndy Adamson 1612408b79bcSJ. Bruce Fields /* 16138323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 16148323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 16158323c3b2SJ. Bruce Fields */ 16168323c3b2SJ. Bruce Fields conf->cl_minorversion = 1; 16178323c3b2SJ. Bruce Fields /* 1618408b79bcSJ. Bruce Fields * We do not support RDMA or persistent sessions 1619408b79bcSJ. Bruce Fields */ 1620408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_PERSIST; 1621408b79bcSJ. Bruce Fields cr_ses->flags &= ~SESSION4_RDMA; 1622408b79bcSJ. Bruce Fields 16231b74c25bSMi Jinlong status = nfserr_toosmall; 16241b74c25bSMi Jinlong if (check_forechannel_attrs(cr_ses->fore_channel)) 16251b74c25bSMi Jinlong goto out; 16261b74c25bSMi Jinlong 1627ac7c46f2SJ. Bruce Fields status = nfserr_jukebox; 1628ac7c46f2SJ. Bruce Fields new = alloc_init_session(rqstp, conf, cr_ses); 1629ac7c46f2SJ. Bruce Fields if (!new) 1630ec6b5d7bSAndy Adamson goto out; 1631ac7c46f2SJ. Bruce Fields status = nfs_ok; 1632ac7c46f2SJ. Bruce Fields memcpy(cr_ses->sessionid.data, new->se_sessionid.data, 1633ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 163412050657SMi Jinlong memcpy(&cr_ses->fore_channel, &new->se_fchannel, 163512050657SMi Jinlong sizeof(struct nfsd4_channel_attrs)); 163686c3e16cSJ. Bruce Fields cs_slot->sl_seqid++; 163749557cc7SAndy Adamson cr_ses->seqid = cs_slot->sl_seqid; 1638ec6b5d7bSAndy Adamson 163949557cc7SAndy Adamson /* cache solo and embedded create sessions under the state lock */ 164049557cc7SAndy Adamson nfsd4_cache_create_session(cr_ses, cs_slot, status); 164186c3e16cSJ. Bruce Fields if (confirm_me) 164286c3e16cSJ. Bruce Fields move_to_confirmed(conf); 1643ec6b5d7bSAndy Adamson out: 1644ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1645ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1646ec6b5d7bSAndy Adamson return status; 1647069b6ad4SAndy Adamson } 1648069b6ad4SAndy Adamson 164957716355SJ. Bruce Fields static bool nfsd4_last_compound_op(struct svc_rqst *rqstp) 165057716355SJ. Bruce Fields { 165157716355SJ. Bruce Fields struct nfsd4_compoundres *resp = rqstp->rq_resp; 165257716355SJ. Bruce Fields struct nfsd4_compoundargs *argp = rqstp->rq_argp; 165357716355SJ. Bruce Fields 165457716355SJ. Bruce Fields return argp->opcnt == resp->opcnt; 165557716355SJ. Bruce Fields } 165657716355SJ. Bruce Fields 16571d1bc8f2SJ. Bruce Fields static __be32 nfsd4_map_bcts_dir(u32 *dir) 16581d1bc8f2SJ. Bruce Fields { 16591d1bc8f2SJ. Bruce Fields switch (*dir) { 16601d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE: 16611d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK: 16621d1bc8f2SJ. Bruce Fields return nfs_ok; 16631d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_FORE_OR_BOTH: 16641d1bc8f2SJ. Bruce Fields case NFS4_CDFC4_BACK_OR_BOTH: 16651d1bc8f2SJ. Bruce Fields *dir = NFS4_CDFC4_BOTH; 16661d1bc8f2SJ. Bruce Fields return nfs_ok; 16671d1bc8f2SJ. Bruce Fields }; 16681d1bc8f2SJ. Bruce Fields return nfserr_inval; 16691d1bc8f2SJ. Bruce Fields } 16701d1bc8f2SJ. Bruce Fields 16711d1bc8f2SJ. Bruce Fields __be32 nfsd4_bind_conn_to_session(struct svc_rqst *rqstp, 16721d1bc8f2SJ. Bruce Fields struct nfsd4_compound_state *cstate, 16731d1bc8f2SJ. Bruce Fields struct nfsd4_bind_conn_to_session *bcts) 16741d1bc8f2SJ. Bruce Fields { 16751d1bc8f2SJ. Bruce Fields __be32 status; 16761d1bc8f2SJ. Bruce Fields 16771d1bc8f2SJ. Bruce Fields if (!nfsd4_last_compound_op(rqstp)) 16781d1bc8f2SJ. Bruce Fields return nfserr_not_only_op; 16791d1bc8f2SJ. Bruce Fields spin_lock(&client_lock); 16801d1bc8f2SJ. Bruce Fields cstate->session = find_in_sessionid_hashtbl(&bcts->sessionid); 16811d1bc8f2SJ. Bruce Fields /* Sorta weird: we only need the refcnt'ing because new_conn acquires 16821d1bc8f2SJ. Bruce Fields * client_lock iself: */ 16831d1bc8f2SJ. Bruce Fields if (cstate->session) { 16841d1bc8f2SJ. Bruce Fields nfsd4_get_session(cstate->session); 16851d1bc8f2SJ. Bruce Fields atomic_inc(&cstate->session->se_client->cl_refcount); 16861d1bc8f2SJ. Bruce Fields } 16871d1bc8f2SJ. Bruce Fields spin_unlock(&client_lock); 16881d1bc8f2SJ. Bruce Fields if (!cstate->session) 16891d1bc8f2SJ. Bruce Fields return nfserr_badsession; 16901d1bc8f2SJ. Bruce Fields 16911d1bc8f2SJ. Bruce Fields status = nfsd4_map_bcts_dir(&bcts->dir); 16921db2b9ddSBryan Schumaker if (!status) 16931d1bc8f2SJ. Bruce Fields nfsd4_new_conn(rqstp, cstate->session, bcts->dir); 16941db2b9ddSBryan Schumaker return status; 16951d1bc8f2SJ. Bruce Fields } 16961d1bc8f2SJ. Bruce Fields 16975d4cec2fSJ. Bruce Fields static bool nfsd4_compound_in_session(struct nfsd4_session *session, struct nfs4_sessionid *sid) 16985d4cec2fSJ. Bruce Fields { 16995d4cec2fSJ. Bruce Fields if (!session) 17005d4cec2fSJ. Bruce Fields return 0; 17015d4cec2fSJ. Bruce Fields return !memcmp(sid, &session->se_sessionid, sizeof(*sid)); 17025d4cec2fSJ. Bruce Fields } 17035d4cec2fSJ. Bruce Fields 1704069b6ad4SAndy Adamson __be32 1705069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1706069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1707069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1708069b6ad4SAndy Adamson { 1709e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1710e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1711e10e0cfcSBenny Halevy 1712e10e0cfcSBenny Halevy /* Notes: 1713e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1714e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1715e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1716e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1717e10e0cfcSBenny Halevy */ 1718e10e0cfcSBenny Halevy 17195d4cec2fSJ. Bruce Fields if (nfsd4_compound_in_session(cstate->session, &sessionid->sessionid)) { 172057716355SJ. Bruce Fields if (!nfsd4_last_compound_op(r)) 172157716355SJ. Bruce Fields return nfserr_not_only_op; 172257716355SJ. Bruce Fields } 1723e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 17249089f1b4SBenny Halevy spin_lock(&client_lock); 1725e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1726e10e0cfcSBenny Halevy if (!ses) { 17279089f1b4SBenny Halevy spin_unlock(&client_lock); 1728e10e0cfcSBenny Halevy goto out; 1729e10e0cfcSBenny Halevy } 1730e10e0cfcSBenny Halevy 1731e10e0cfcSBenny Halevy unhash_session(ses); 17329089f1b4SBenny Halevy spin_unlock(&client_lock); 1733e10e0cfcSBenny Halevy 1734ab707e15SBenny Halevy nfs4_lock_state(); 173584f5f7ccSJ. Bruce Fields nfsd4_probe_callback_sync(ses->se_client); 1736ab707e15SBenny Halevy nfs4_unlock_state(); 173719cf5c02SJ. Bruce Fields 173819cf5c02SJ. Bruce Fields nfsd4_del_conns(ses); 173919cf5c02SJ. Bruce Fields 1740e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1741e10e0cfcSBenny Halevy status = nfs_ok; 1742e10e0cfcSBenny Halevy out: 1743e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1744e10e0cfcSBenny Halevy return status; 1745069b6ad4SAndy Adamson } 1746069b6ad4SAndy Adamson 1747a663bdd8SJ. Bruce Fields static struct nfsd4_conn *__nfsd4_find_conn(struct svc_xprt *xpt, struct nfsd4_session *s) 1748328ead28SJ. Bruce Fields { 1749328ead28SJ. Bruce Fields struct nfsd4_conn *c; 1750328ead28SJ. Bruce Fields 1751328ead28SJ. Bruce Fields list_for_each_entry(c, &s->se_conns, cn_persession) { 1752a663bdd8SJ. Bruce Fields if (c->cn_xprt == xpt) { 1753328ead28SJ. Bruce Fields return c; 1754328ead28SJ. Bruce Fields } 1755328ead28SJ. Bruce Fields } 1756328ead28SJ. Bruce Fields return NULL; 1757328ead28SJ. Bruce Fields } 1758328ead28SJ. Bruce Fields 1759a663bdd8SJ. Bruce Fields static void nfsd4_sequence_check_conn(struct nfsd4_conn *new, struct nfsd4_session *ses) 1760328ead28SJ. Bruce Fields { 1761328ead28SJ. Bruce Fields struct nfs4_client *clp = ses->se_client; 1762a663bdd8SJ. Bruce Fields struct nfsd4_conn *c; 176321b75b01SJ. Bruce Fields int ret; 1764328ead28SJ. Bruce Fields 1765328ead28SJ. Bruce Fields spin_lock(&clp->cl_lock); 1766a663bdd8SJ. Bruce Fields c = __nfsd4_find_conn(new->cn_xprt, ses); 1767328ead28SJ. Bruce Fields if (c) { 1768328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 1769328ead28SJ. Bruce Fields free_conn(new); 1770328ead28SJ. Bruce Fields return; 1771328ead28SJ. Bruce Fields } 1772328ead28SJ. Bruce Fields __nfsd4_hash_conn(new, ses); 1773328ead28SJ. Bruce Fields spin_unlock(&clp->cl_lock); 177421b75b01SJ. Bruce Fields ret = nfsd4_register_conn(new); 177521b75b01SJ. Bruce Fields if (ret) 177621b75b01SJ. Bruce Fields /* oops; xprt is already down: */ 177721b75b01SJ. Bruce Fields nfsd4_conn_lost(&new->cn_xpt_user); 1778328ead28SJ. Bruce Fields return; 1779328ead28SJ. Bruce Fields } 1780328ead28SJ. Bruce Fields 1781868b89c3SMi Jinlong static bool nfsd4_session_too_many_ops(struct svc_rqst *rqstp, struct nfsd4_session *session) 1782868b89c3SMi Jinlong { 1783868b89c3SMi Jinlong struct nfsd4_compoundargs *args = rqstp->rq_argp; 1784868b89c3SMi Jinlong 1785868b89c3SMi Jinlong return args->opcnt > session->se_fchannel.maxops; 1786868b89c3SMi Jinlong } 1787868b89c3SMi Jinlong 1788ae82a8d0SMi Jinlong static bool nfsd4_request_too_big(struct svc_rqst *rqstp, 1789ae82a8d0SMi Jinlong struct nfsd4_session *session) 1790ae82a8d0SMi Jinlong { 1791ae82a8d0SMi Jinlong struct xdr_buf *xb = &rqstp->rq_arg; 1792ae82a8d0SMi Jinlong 1793ae82a8d0SMi Jinlong return xb->len > session->se_fchannel.maxreq_sz; 1794ae82a8d0SMi Jinlong } 1795ae82a8d0SMi Jinlong 1796069b6ad4SAndy Adamson __be32 1797b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1798069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1799069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1800069b6ad4SAndy Adamson { 1801f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1802b85d4c01SBenny Halevy struct nfsd4_session *session; 1803b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1804a663bdd8SJ. Bruce Fields struct nfsd4_conn *conn; 1805b85d4c01SBenny Halevy int status; 1806b85d4c01SBenny Halevy 1807f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1808f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1809f9bb94c4SAndy Adamson 1810a663bdd8SJ. Bruce Fields /* 1811a663bdd8SJ. Bruce Fields * Will be either used or freed by nfsd4_sequence_check_conn 1812a663bdd8SJ. Bruce Fields * below. 1813a663bdd8SJ. Bruce Fields */ 1814a663bdd8SJ. Bruce Fields conn = alloc_conn(rqstp, NFS4_CDFC4_FORE); 1815a663bdd8SJ. Bruce Fields if (!conn) 1816a663bdd8SJ. Bruce Fields return nfserr_jukebox; 1817a663bdd8SJ. Bruce Fields 18189089f1b4SBenny Halevy spin_lock(&client_lock); 1819b85d4c01SBenny Halevy status = nfserr_badsession; 1820b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1821b85d4c01SBenny Halevy if (!session) 1822b85d4c01SBenny Halevy goto out; 1823b85d4c01SBenny Halevy 1824868b89c3SMi Jinlong status = nfserr_too_many_ops; 1825868b89c3SMi Jinlong if (nfsd4_session_too_many_ops(rqstp, session)) 1826868b89c3SMi Jinlong goto out; 1827868b89c3SMi Jinlong 1828ae82a8d0SMi Jinlong status = nfserr_req_too_big; 1829ae82a8d0SMi Jinlong if (nfsd4_request_too_big(rqstp, session)) 1830ae82a8d0SMi Jinlong goto out; 1831ae82a8d0SMi Jinlong 1832b85d4c01SBenny Halevy status = nfserr_badslot; 18336c18ba9fSAlexandros Batsakis if (seq->slotid >= session->se_fchannel.maxreqs) 1834b85d4c01SBenny Halevy goto out; 1835b85d4c01SBenny Halevy 1836557ce264SAndy Adamson slot = session->se_slots[seq->slotid]; 1837b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1838b85d4c01SBenny Halevy 1839a8dfdaebSAndy Adamson /* We do not negotiate the number of slots yet, so set the 1840a8dfdaebSAndy Adamson * maxslots to the session maxreqs which is used to encode 1841a8dfdaebSAndy Adamson * sr_highest_slotid and the sr_target_slot id to maxslots */ 1842a8dfdaebSAndy Adamson seq->maxslots = session->se_fchannel.maxreqs; 1843a8dfdaebSAndy Adamson 184488e588d5SAndy Adamson status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); 1845b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1846b85d4c01SBenny Halevy cstate->slot = slot; 1847b85d4c01SBenny Halevy cstate->session = session; 1848da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1849557ce264SAndy Adamson * for nfsd4_proc_compound processing */ 1850bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1851da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1852aaf84eb9SBenny Halevy goto out; 1853b85d4c01SBenny Halevy } 1854b85d4c01SBenny Halevy if (status) 1855b85d4c01SBenny Halevy goto out; 1856b85d4c01SBenny Halevy 1857a663bdd8SJ. Bruce Fields nfsd4_sequence_check_conn(conn, session); 1858a663bdd8SJ. Bruce Fields conn = NULL; 1859328ead28SJ. Bruce Fields 1860b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1861b85d4c01SBenny Halevy slot->sl_inuse = true; 1862b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1863557ce264SAndy Adamson slot->sl_cachethis = seq->cachethis; 1864b85d4c01SBenny Halevy 1865b85d4c01SBenny Halevy cstate->slot = slot; 1866b85d4c01SBenny Halevy cstate->session = session; 1867b85d4c01SBenny Halevy 1868b85d4c01SBenny Halevy out: 186926c0c75eSJ. Bruce Fields /* Hold a session reference until done processing the compound. */ 1870aaf84eb9SBenny Halevy if (cstate->session) { 18710d7bb719SJ. Bruce Fields struct nfs4_client *clp = session->se_client; 18720d7bb719SJ. Bruce Fields 187336acb66bSBenny Halevy nfsd4_get_session(cstate->session); 18740d7bb719SJ. Bruce Fields atomic_inc(&clp->cl_refcount); 18750d7bb719SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_DOWN) 18760d7bb719SJ. Bruce Fields seq->status_flags |= SEQ4_STATUS_CB_PATH_DOWN; 1877aaf84eb9SBenny Halevy } 1878a663bdd8SJ. Bruce Fields kfree(conn); 187936acb66bSBenny Halevy spin_unlock(&client_lock); 1880b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1881b85d4c01SBenny Halevy return status; 1882069b6ad4SAndy Adamson } 1883069b6ad4SAndy Adamson 1884069b6ad4SAndy Adamson __be32 18854dc6ec00SJ. Bruce Fields nfsd4_reclaim_complete(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, struct nfsd4_reclaim_complete *rc) 18864dc6ec00SJ. Bruce Fields { 1887bcecf1ccSMi Jinlong int status = 0; 1888bcecf1ccSMi Jinlong 18894dc6ec00SJ. Bruce Fields if (rc->rca_one_fs) { 18904dc6ec00SJ. Bruce Fields if (!cstate->current_fh.fh_dentry) 18914dc6ec00SJ. Bruce Fields return nfserr_nofilehandle; 18924dc6ec00SJ. Bruce Fields /* 18934dc6ec00SJ. Bruce Fields * We don't take advantage of the rca_one_fs case. 18944dc6ec00SJ. Bruce Fields * That's OK, it's optional, we can safely ignore it. 18954dc6ec00SJ. Bruce Fields */ 18964dc6ec00SJ. Bruce Fields return nfs_ok; 18974dc6ec00SJ. Bruce Fields } 1898bcecf1ccSMi Jinlong 18994dc6ec00SJ. Bruce Fields nfs4_lock_state(); 1900bcecf1ccSMi Jinlong status = nfserr_complete_already; 1901bcecf1ccSMi Jinlong if (cstate->session->se_client->cl_firststate) 1902bcecf1ccSMi Jinlong goto out; 1903bcecf1ccSMi Jinlong 1904bcecf1ccSMi Jinlong status = nfserr_stale_clientid; 1905bcecf1ccSMi Jinlong if (is_client_expired(cstate->session->se_client)) 19064dc6ec00SJ. Bruce Fields /* 19074dc6ec00SJ. Bruce Fields * The following error isn't really legal. 19084dc6ec00SJ. Bruce Fields * But we only get here if the client just explicitly 19094dc6ec00SJ. Bruce Fields * destroyed the client. Surely it no longer cares what 19104dc6ec00SJ. Bruce Fields * error it gets back on an operation for the dead 19114dc6ec00SJ. Bruce Fields * client. 19124dc6ec00SJ. Bruce Fields */ 1913bcecf1ccSMi Jinlong goto out; 1914bcecf1ccSMi Jinlong 1915bcecf1ccSMi Jinlong status = nfs_ok; 19164dc6ec00SJ. Bruce Fields nfsd4_create_clid_dir(cstate->session->se_client); 1917bcecf1ccSMi Jinlong out: 19184dc6ec00SJ. Bruce Fields nfs4_unlock_state(); 1919bcecf1ccSMi Jinlong return status; 19204dc6ec00SJ. Bruce Fields } 19214dc6ec00SJ. Bruce Fields 19224dc6ec00SJ. Bruce Fields __be32 1923b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1924b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 19251da177e4SLinus Torvalds { 19261da177e4SLinus Torvalds struct xdr_netobj clname = { 19271da177e4SLinus Torvalds .len = setclid->se_namelen, 19281da177e4SLinus Torvalds .data = setclid->se_name, 19291da177e4SLinus Torvalds }; 19301da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 19311da177e4SLinus Torvalds unsigned int strhashval; 193228ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1933b37ad28bSAl Viro __be32 status; 1934a55370a3SNeilBrown char dname[HEXDIR_LEN]; 19351da177e4SLinus Torvalds 19361da177e4SLinus Torvalds if (!check_name(clname)) 193773aea4ecSNeil Brown return nfserr_inval; 19381da177e4SLinus Torvalds 1939a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1940a55370a3SNeilBrown if (status) 194173aea4ecSNeil Brown return status; 1942a55370a3SNeilBrown 19431da177e4SLinus Torvalds /* 19441da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 19451da177e4SLinus Torvalds * We get here on a DRC miss. 19461da177e4SLinus Torvalds */ 19471da177e4SLinus Torvalds 1948a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds nfs4_lock_state(); 1951e203d506SJ. Bruce Fields conf = find_confirmed_client_by_str(dname, strhashval); 195228ce6054SNeilBrown if (conf) { 1953a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 19541da177e4SLinus Torvalds status = nfserr_clid_inuse; 1955e203d506SJ. Bruce Fields if (clp_used_exchangeid(conf)) 1956e203d506SJ. Bruce Fields goto out; 1957026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1958363168b4SJeff Layton char addr_str[INET6_ADDRSTRLEN]; 1959363168b4SJeff Layton rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, 1960363168b4SJeff Layton sizeof(addr_str)); 1961026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client " 1962363168b4SJeff Layton "at %s\n", addr_str); 19631da177e4SLinus Torvalds goto out; 19641da177e4SLinus Torvalds } 19651da177e4SLinus Torvalds } 1966a186e767SJ. Bruce Fields /* 1967a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1968a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1969a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1970a186e767SJ. Bruce Fields */ 1971e203d506SJ. Bruce Fields unconf = find_unconfirmed_client_by_str(dname, strhashval); 19723e772463SJ. Bruce Fields status = nfserr_jukebox; 19731da177e4SLinus Torvalds if (!conf) { 19741da177e4SLinus Torvalds /* 1975a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1976a186e767SJ. Bruce Fields * placed first, because it is the normal case 19771da177e4SLinus Torvalds */ 19781da177e4SLinus Torvalds if (unconf) 19791da177e4SLinus Torvalds expire_client(unconf); 1980b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1981a55370a3SNeilBrown if (new == NULL) 19821da177e4SLinus Torvalds goto out; 19831da177e4SLinus Torvalds gen_clid(new); 1984599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 19851da177e4SLinus Torvalds /* 1986a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1987a186e767SJ. Bruce Fields * probable callback update 19881da177e4SLinus Torvalds */ 198931f4a6c1SNeilBrown if (unconf) { 199031f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 199131f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 199231f4a6c1SNeilBrown * This has the advantage that there is at most 199331f4a6c1SNeilBrown * one {*x***} in either list at any time. 199431f4a6c1SNeilBrown */ 19951da177e4SLinus Torvalds expire_client(unconf); 19961da177e4SLinus Torvalds } 1997b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 1998a55370a3SNeilBrown if (new == NULL) 19991da177e4SLinus Torvalds goto out; 20001da177e4SLinus Torvalds copy_clid(new, conf); 20011da177e4SLinus Torvalds } else if (!unconf) { 20021da177e4SLinus Torvalds /* 2003a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 2004a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2005a186e767SJ. Bruce Fields * confirmed. 20061da177e4SLinus Torvalds */ 2007b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2008a55370a3SNeilBrown if (new == NULL) 20091da177e4SLinus Torvalds goto out; 20101da177e4SLinus Torvalds gen_clid(new); 201149ba8781SJ. Bruce Fields } else { 20121da177e4SLinus Torvalds /* 2013a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 2014a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 2015a186e767SJ. Bruce Fields * confirmed. 20161da177e4SLinus Torvalds */ 20171da177e4SLinus Torvalds expire_client(unconf); 2018b09333c4SRicardo Labiaga new = create_client(clname, dname, rqstp, &clverifier); 2019a55370a3SNeilBrown if (new == NULL) 20201da177e4SLinus Torvalds goto out; 20211da177e4SLinus Torvalds gen_clid(new); 20221da177e4SLinus Torvalds } 20238323c3b2SJ. Bruce Fields /* 20248323c3b2SJ. Bruce Fields * XXX: we should probably set this at creation time, and check 20258323c3b2SJ. Bruce Fields * for consistent minorversion use throughout: 20268323c3b2SJ. Bruce Fields */ 20278323c3b2SJ. Bruce Fields new->cl_minorversion = 0; 20286f3d772fSTakuma Umeya gen_callback(new, setclid, rqstp); 2029c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 20301da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 20311da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 20321da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 20331da177e4SLinus Torvalds status = nfs_ok; 20341da177e4SLinus Torvalds out: 20351da177e4SLinus Torvalds nfs4_unlock_state(); 20361da177e4SLinus Torvalds return status; 20371da177e4SLinus Torvalds } 20381da177e4SLinus Torvalds 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds /* 2041a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 2042a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 2043a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 20441da177e4SLinus Torvalds */ 2045b37ad28bSAl Viro __be32 2046b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 2047b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2048b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 20491da177e4SLinus Torvalds { 2050363168b4SJeff Layton struct sockaddr *sa = svc_addr(rqstp); 205121ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 20521da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 20531da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 2054b37ad28bSAl Viro __be32 status; 20551da177e4SLinus Torvalds 20561da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 20571da177e4SLinus Torvalds return nfserr_stale_clientid; 20581da177e4SLinus Torvalds /* 20591da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 20601da177e4SLinus Torvalds * We get here on a DRC miss. 20611da177e4SLinus Torvalds */ 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds nfs4_lock_state(); 206421ab45a4SNeilBrown 206521ab45a4SNeilBrown conf = find_confirmed_client(clid); 206621ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 206721ab45a4SNeilBrown 206822de4d83SNeilBrown status = nfserr_clid_inuse; 2069363168b4SJeff Layton if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) 20701da177e4SLinus Torvalds goto out; 2071363168b4SJeff Layton if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) 20721da177e4SLinus Torvalds goto out; 207321ab45a4SNeilBrown 2074a186e767SJ. Bruce Fields /* 2075a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 2076a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 2077a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 2078a186e767SJ. Bruce Fields */ 2079366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 2080a186e767SJ. Bruce Fields /* 2081a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 2082a186e767SJ. Bruce Fields * callback update 20837c79f737SNeilBrown */ 2084599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 20851da177e4SLinus Torvalds status = nfserr_clid_inuse; 20861da177e4SLinus Torvalds else { 20875a3c9d71SJ. Bruce Fields nfsd4_change_callback(conf, &unconf->cl_cb_conn); 20885a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 20891a69c179SNeilBrown expire_client(unconf); 20901da177e4SLinus Torvalds status = nfs_ok; 20911a69c179SNeilBrown 20921da177e4SLinus Torvalds } 2093f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 2094a186e767SJ. Bruce Fields /* 2095a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 2096a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 2097a186e767SJ. Bruce Fields * do nothing. 20987c79f737SNeilBrown */ 2099599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 21001da177e4SLinus Torvalds status = nfserr_clid_inuse; 210121ab45a4SNeilBrown else 21021da177e4SLinus Torvalds status = nfs_ok; 21037c79f737SNeilBrown } else if (!conf && unconf 2104599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 2105a186e767SJ. Bruce Fields /* 2106a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 2107a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 21081da177e4SLinus Torvalds */ 2109599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 21101da177e4SLinus Torvalds status = nfserr_clid_inuse; 21111da177e4SLinus Torvalds } else { 21121a69c179SNeilBrown unsigned int hash = 21131a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 21141a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 2115e203d506SJ. Bruce Fields hash); 21161a69c179SNeilBrown if (conf) { 2117c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 21181a69c179SNeilBrown expire_client(conf); 21191a69c179SNeilBrown } 21201da177e4SLinus Torvalds move_to_confirmed(unconf); 212121ab45a4SNeilBrown conf = unconf; 21225a3c9d71SJ. Bruce Fields nfsd4_probe_callback(conf); 21231a69c179SNeilBrown status = nfs_ok; 21241da177e4SLinus Torvalds } 2125599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 2126599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 21277c79f737SNeilBrown &confirm)))) { 2128a186e767SJ. Bruce Fields /* 2129a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 2130a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 21311da177e4SLinus Torvalds */ 21321da177e4SLinus Torvalds status = nfserr_stale_clientid; 21337c79f737SNeilBrown } else { 21341da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 213522de4d83SNeilBrown status = nfserr_clid_inuse; 213608e8987cSNeilBrown } 21371da177e4SLinus Torvalds out: 21381da177e4SLinus Torvalds nfs4_unlock_state(); 21391da177e4SLinus Torvalds return status; 21401da177e4SLinus Torvalds } 21411da177e4SLinus Torvalds 21421da177e4SLinus Torvalds /* OPEN Share state helper functions */ 21431da177e4SLinus Torvalds static inline struct nfs4_file * 21441da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 21451da177e4SLinus Torvalds { 21461da177e4SLinus Torvalds struct nfs4_file *fp; 21471da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 21481da177e4SLinus Torvalds 2149e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 2150e60d4398SNeilBrown if (fp) { 21518b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 21521da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 21538beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 21548beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 21551da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 21561da177e4SLinus Torvalds fp->fi_id = current_fileid++; 215747f9940cSMeelap Shah fp->fi_had_conflict = false; 2158acfdf5c3SJ. Bruce Fields fp->fi_lease = NULL; 2159f9d7562fSJ. Bruce Fields memset(fp->fi_fds, 0, sizeof(fp->fi_fds)); 2160f9d7562fSJ. Bruce Fields memset(fp->fi_access, 0, sizeof(fp->fi_access)); 216147cee541SPavel Emelyanov spin_lock(&recall_lock); 216247cee541SPavel Emelyanov list_add(&fp->fi_hash, &file_hashtbl[hashval]); 216347cee541SPavel Emelyanov spin_unlock(&recall_lock); 21641da177e4SLinus Torvalds return fp; 21651da177e4SLinus Torvalds } 21661da177e4SLinus Torvalds return NULL; 21671da177e4SLinus Torvalds } 21681da177e4SLinus Torvalds 21691da177e4SLinus Torvalds static void 2170e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 2171e60d4398SNeilBrown { 2172e60d4398SNeilBrown if (*slab == NULL) 2173e60d4398SNeilBrown return; 21741a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 2175e60d4398SNeilBrown *slab = NULL; 2176e60d4398SNeilBrown } 2177e60d4398SNeilBrown 2178e8ff2a84SJ. Bruce Fields void 2179e60d4398SNeilBrown nfsd4_free_slabs(void) 2180e60d4398SNeilBrown { 2181fe0750e5SJ. Bruce Fields nfsd4_free_slab(&openowner_slab); 2182fe0750e5SJ. Bruce Fields nfsd4_free_slab(&lockowner_slab); 2183e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 21845ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 21855b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 2186e60d4398SNeilBrown } 21871da177e4SLinus Torvalds 21881da177e4SLinus Torvalds static int 21891da177e4SLinus Torvalds nfsd4_init_slabs(void) 21901da177e4SLinus Torvalds { 2191fe0750e5SJ. Bruce Fields openowner_slab = kmem_cache_create("nfsd4_openowners", 2192fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2193fe0750e5SJ. Bruce Fields if (openowner_slab == NULL) 2194fe0750e5SJ. Bruce Fields goto out_nomem; 2195fe0750e5SJ. Bruce Fields lockowner_slab = kmem_cache_create("nfsd4_lockowners", 2196fe0750e5SJ. Bruce Fields sizeof(struct nfs4_openowner), 0, 0, NULL); 2197fe0750e5SJ. Bruce Fields if (lockowner_slab == NULL) 2198e60d4398SNeilBrown goto out_nomem; 2199e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 220020c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 2201e60d4398SNeilBrown if (file_slab == NULL) 2202e60d4398SNeilBrown goto out_nomem; 22035ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 220420c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 22055ac049acSNeilBrown if (stateid_slab == NULL) 22065ac049acSNeilBrown goto out_nomem; 22075b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 220820c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 22095b2d21c1SNeilBrown if (deleg_slab == NULL) 22105b2d21c1SNeilBrown goto out_nomem; 2211e60d4398SNeilBrown return 0; 2212e60d4398SNeilBrown out_nomem: 2213e60d4398SNeilBrown nfsd4_free_slabs(); 22141da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 22151da177e4SLinus Torvalds return -ENOMEM; 22161da177e4SLinus Torvalds } 22171da177e4SLinus Torvalds 2218fe0750e5SJ. Bruce Fields void nfs4_free_openowner(struct nfs4_openowner *oo) 22191da177e4SLinus Torvalds { 2220fe0750e5SJ. Bruce Fields kfree(oo->oo_owner.so_owner.data); 2221fe0750e5SJ. Bruce Fields kmem_cache_free(openowner_slab, oo); 2222fe0750e5SJ. Bruce Fields } 2223fe0750e5SJ. Bruce Fields 2224fe0750e5SJ. Bruce Fields void nfs4_free_lockowner(struct nfs4_lockowner *lo) 2225fe0750e5SJ. Bruce Fields { 2226fe0750e5SJ. Bruce Fields kfree(lo->lo_owner.so_owner.data); 2227fe0750e5SJ. Bruce Fields kmem_cache_free(lockowner_slab, lo); 22281da177e4SLinus Torvalds } 22291da177e4SLinus Torvalds 2230ff194bd9SJ. Bruce Fields static void init_nfs4_replay(struct nfs4_replay *rp) 2231ff194bd9SJ. Bruce Fields { 2232ff194bd9SJ. Bruce Fields rp->rp_status = nfserr_serverfault; 2233ff194bd9SJ. Bruce Fields rp->rp_buflen = 0; 2234ff194bd9SJ. Bruce Fields rp->rp_buf = rp->rp_ibuf; 2235ff194bd9SJ. Bruce Fields } 2236ff194bd9SJ. Bruce Fields 2237fe0750e5SJ. Bruce Fields static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj *owner, struct nfs4_client *clp) 22381da177e4SLinus Torvalds { 22391da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22401da177e4SLinus Torvalds 2241fe0750e5SJ. Bruce Fields sop = kmem_cache_alloc(slab, GFP_KERNEL); 2242ff194bd9SJ. Bruce Fields if (!sop) 2243ff194bd9SJ. Bruce Fields return NULL; 2244ff194bd9SJ. Bruce Fields 2245ff194bd9SJ. Bruce Fields sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL); 2246ff194bd9SJ. Bruce Fields if (!sop->so_owner.data) { 2247fe0750e5SJ. Bruce Fields kmem_cache_free(slab, sop); 2248ff194bd9SJ. Bruce Fields return NULL; 2249ff194bd9SJ. Bruce Fields } 22501da177e4SLinus Torvalds sop->so_owner.len = owner->len; 2251ff194bd9SJ. Bruce Fields 2252ff194bd9SJ. Bruce Fields INIT_LIST_HEAD(&sop->so_stateids); 2253ff194bd9SJ. Bruce Fields sop->so_id = current_ownerid++; 2254ff194bd9SJ. Bruce Fields sop->so_client = clp; 2255ff194bd9SJ. Bruce Fields init_nfs4_replay(&sop->so_replay); 22561da177e4SLinus Torvalds return sop; 22571da177e4SLinus Torvalds } 2258ff194bd9SJ. Bruce Fields 2259fe0750e5SJ. Bruce Fields static void hash_openowner(struct nfs4_openowner *oo, struct nfs4_client *clp, unsigned int strhashval) 2260ff194bd9SJ. Bruce Fields { 2261ff194bd9SJ. Bruce Fields unsigned int idhashval; 2262ff194bd9SJ. Bruce Fields 2263fe0750e5SJ. Bruce Fields idhashval = open_ownerid_hashval(oo->oo_owner.so_id); 2264fe0750e5SJ. Bruce Fields list_add(&oo->oo_owner.so_idhash, &open_ownerid_hashtbl[idhashval]); 2265fe0750e5SJ. Bruce Fields list_add(&oo->oo_owner.so_strhash, &open_ownerstr_hashtbl[strhashval]); 2266fe0750e5SJ. Bruce Fields list_add(&oo->oo_perclient, &clp->cl_openowners); 22671da177e4SLinus Torvalds } 22681da177e4SLinus Torvalds 2269fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 22701da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 2271fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 22721da177e4SLinus Torvalds 2273fe0750e5SJ. Bruce Fields oo = alloc_stateowner(openowner_slab, &open->op_owner, clp); 2274fe0750e5SJ. Bruce Fields if (!oo) 22751da177e4SLinus Torvalds return NULL; 2276fe0750e5SJ. Bruce Fields oo->oo_owner.so_is_open_owner = 1; 2277fe0750e5SJ. Bruce Fields oo->oo_owner.so_seqid = open->op_seqid; 2278fe0750e5SJ. Bruce Fields oo->oo_confirmed = 0; 2279fe0750e5SJ. Bruce Fields oo->oo_time = 0; 2280fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&oo->oo_close_lru); 2281fe0750e5SJ. Bruce Fields hash_openowner(oo, clp, strhashval); 2282fe0750e5SJ. Bruce Fields return oo; 22831da177e4SLinus Torvalds } 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds static inline void 22861da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 2287fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 2288fe0750e5SJ. Bruce Fields unsigned int hashval = stateid_hashval(oo->oo_owner.so_id, fp->fi_id); 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 2291ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2292ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 22931da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 22941da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 2295fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &oo->oo_owner.so_stateids); 22968beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 22975fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_OPEN_STID; 2298fe0750e5SJ. Bruce Fields stp->st_stateowner = &oo->oo_owner; 229913cd2184SNeilBrown get_nfs4_file(fp); 23001da177e4SLinus Torvalds stp->st_file = fp; 2301e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 2302fe0750e5SJ. Bruce Fields stp->st_stateid.si_stateownerid = oo->oo_owner.so_id; 23031da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 230473997dc4SJ. Bruce Fields /* note will be incremented before first return to client: */ 23051da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 23061da177e4SLinus Torvalds stp->st_access_bmap = 0; 23071da177e4SLinus Torvalds stp->st_deny_bmap = 0; 230884459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 230984459a11SAndy Adamson &stp->st_access_bmap); 23101da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 23114c4cd222SNeilBrown stp->st_openstp = NULL; 23121da177e4SLinus Torvalds } 23131da177e4SLinus Torvalds 23141da177e4SLinus Torvalds static void 2315fe0750e5SJ. Bruce Fields move_to_close_lru(struct nfs4_openowner *oo) 23161da177e4SLinus Torvalds { 2317fe0750e5SJ. Bruce Fields dprintk("NFSD: move_to_close_lru nfs4_openowner %p\n", oo); 23181da177e4SLinus Torvalds 2319fe0750e5SJ. Bruce Fields list_move_tail(&oo->oo_close_lru, &close_lru); 2320fe0750e5SJ. Bruce Fields oo->oo_time = get_seconds(); 23211da177e4SLinus Torvalds } 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds static int 2324599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 2325599e0a22SJ. Bruce Fields clientid_t *clid) 2326599e0a22SJ. Bruce Fields { 2327599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 2328599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 2329599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 23301da177e4SLinus Torvalds } 23311da177e4SLinus Torvalds 2332fe0750e5SJ. Bruce Fields static struct nfs4_openowner * 23331da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 23341da177e4SLinus Torvalds { 23351da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 23361da177e4SLinus Torvalds 2337506f275fSJ. Bruce Fields list_for_each_entry(so, &open_ownerstr_hashtbl[hashval], so_strhash) { 2338599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 2339fe0750e5SJ. Bruce Fields return container_of(so, struct nfs4_openowner, oo_owner); 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds return NULL; 23421da177e4SLinus Torvalds } 23431da177e4SLinus Torvalds 23441da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 23451da177e4SLinus Torvalds static struct nfs4_file * 23461da177e4SLinus Torvalds find_file(struct inode *ino) 23471da177e4SLinus Torvalds { 23481da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 23491da177e4SLinus Torvalds struct nfs4_file *fp; 23501da177e4SLinus Torvalds 23518b671b80SJ. Bruce Fields spin_lock(&recall_lock); 23521da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 235313cd2184SNeilBrown if (fp->fi_inode == ino) { 235413cd2184SNeilBrown get_nfs4_file(fp); 23558b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23561da177e4SLinus Torvalds return fp; 23571da177e4SLinus Torvalds } 235813cd2184SNeilBrown } 23598b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 23601da177e4SLinus Torvalds return NULL; 23611da177e4SLinus Torvalds } 23621da177e4SLinus Torvalds 2363d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 2364ba5a6a19SJ. Bruce Fields { 2365d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 23668838dc43SJ. Bruce Fields return 0; 2367d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 2368d87a8adeSAndy Adamson return 0; 2369d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 2370d87a8adeSAndy Adamson if (minorversion && x) { 2371d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 2372d87a8adeSAndy Adamson return 0; 2373d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 2374d87a8adeSAndy Adamson return 0; 2375d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 2376d87a8adeSAndy Adamson } 2377d87a8adeSAndy Adamson if (x) 23788838dc43SJ. Bruce Fields return 0; 23798838dc43SJ. Bruce Fields return 1; 2380ba5a6a19SJ. Bruce Fields } 2381ba5a6a19SJ. Bruce Fields 23828838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 2383ba5a6a19SJ. Bruce Fields { 23848838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 23858838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 2386ba5a6a19SJ. Bruce Fields } 23871da177e4SLinus Torvalds 23884f83aa30SJ. Bruce Fields /* 23891da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 23901da177e4SLinus Torvalds * WRITE with all zero or all one stateid 23911da177e4SLinus Torvalds */ 2392b37ad28bSAl Viro static __be32 23931da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 23941da177e4SLinus Torvalds { 23951da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 23961da177e4SLinus Torvalds struct nfs4_file *fp; 23971da177e4SLinus Torvalds struct nfs4_stateid *stp; 2398b37ad28bSAl Viro __be32 ret; 23991da177e4SLinus Torvalds 24001da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds fp = find_file(ino); 240313cd2184SNeilBrown if (!fp) 240413cd2184SNeilBrown return nfs_ok; 2405b700949bSNeilBrown ret = nfserr_locked; 24061da177e4SLinus Torvalds /* Search for conflicting share reservations */ 24078beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 24081da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 24091da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 241013cd2184SNeilBrown goto out; 24111da177e4SLinus Torvalds } 241213cd2184SNeilBrown ret = nfs_ok; 241313cd2184SNeilBrown out: 241413cd2184SNeilBrown put_nfs4_file(fp); 241513cd2184SNeilBrown return ret; 24161da177e4SLinus Torvalds } 24171da177e4SLinus Torvalds 24186b57d9c8SJ. Bruce Fields static void nfsd_break_one_deleg(struct nfs4_delegation *dp) 24191da177e4SLinus Torvalds { 24201da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 24211da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 24221da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 24231da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 24241da177e4SLinus Torvalds * it's safe to take a reference: */ 24251da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 24261da177e4SLinus Torvalds 24271da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 24281da177e4SLinus Torvalds 2429460781b5SArnd Bergmann /* only place dl_time is set. protected by lock_flocks*/ 24301da177e4SLinus Torvalds dp->dl_time = get_seconds(); 24311da177e4SLinus Torvalds 24326b57d9c8SJ. Bruce Fields nfsd4_cb_recall(dp); 24336b57d9c8SJ. Bruce Fields } 24346b57d9c8SJ. Bruce Fields 2435acfdf5c3SJ. Bruce Fields /* Called from break_lease() with lock_flocks() held. */ 24366b57d9c8SJ. Bruce Fields static void nfsd_break_deleg_cb(struct file_lock *fl) 24376b57d9c8SJ. Bruce Fields { 2438acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = (struct nfs4_file *)fl->fl_owner; 2439acfdf5c3SJ. Bruce Fields struct nfs4_delegation *dp; 24406b57d9c8SJ. Bruce Fields 2441acfdf5c3SJ. Bruce Fields BUG_ON(!fp); 2442acfdf5c3SJ. Bruce Fields /* We assume break_lease is only called once per lease: */ 2443acfdf5c3SJ. Bruce Fields BUG_ON(fp->fi_had_conflict); 24440272e1fdSJ. Bruce Fields /* 24450272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 2446acfdf5c3SJ. Bruce Fields * we'll remove it ourself if a delegation isn't returned 24476b57d9c8SJ. Bruce Fields * in time: 24480272e1fdSJ. Bruce Fields */ 24490272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 24501da177e4SLinus Torvalds 24515d926e8cSJ. Bruce Fields spin_lock(&recall_lock); 2452acfdf5c3SJ. Bruce Fields fp->fi_had_conflict = true; 2453acfdf5c3SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 24545d926e8cSJ. Bruce Fields nfsd_break_one_deleg(dp); 24555d926e8cSJ. Bruce Fields spin_unlock(&recall_lock); 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds static 24591da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 24601da177e4SLinus Torvalds { 24611da177e4SLinus Torvalds if (arg & F_UNLCK) 24621da177e4SLinus Torvalds return lease_modify(onlist, arg); 24631da177e4SLinus Torvalds else 24641da177e4SLinus Torvalds return -EAGAIN; 24651da177e4SLinus Torvalds } 24661da177e4SLinus Torvalds 24677b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_lease_mng_ops = { 24688fb47a4fSJ. Bruce Fields .lm_break = nfsd_break_deleg_cb, 24698fb47a4fSJ. Bruce Fields .lm_change = nfsd_change_deleg_cb, 24701da177e4SLinus Torvalds }; 24711da177e4SLinus Torvalds 24727a8711c9SJ. Bruce Fields static __be32 nfsd4_check_seqid(struct nfsd4_compound_state *cstate, struct nfs4_stateowner *so, u32 seqid) 24737a8711c9SJ. Bruce Fields { 24747a8711c9SJ. Bruce Fields if (nfsd4_has_session(cstate)) 24757a8711c9SJ. Bruce Fields return nfs_ok; 24767a8711c9SJ. Bruce Fields if (seqid == so->so_seqid - 1) 24777a8711c9SJ. Bruce Fields return nfserr_replay_me; 24787a8711c9SJ. Bruce Fields if (seqid == so->so_seqid) 24797a8711c9SJ. Bruce Fields return nfs_ok; 24807a8711c9SJ. Bruce Fields return nfserr_bad_seqid; 24817a8711c9SJ. Bruce Fields } 24821da177e4SLinus Torvalds 2483b37ad28bSAl Viro __be32 24846668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 24856668958fSAndy Adamson struct nfsd4_open *open) 24861da177e4SLinus Torvalds { 24871da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 24881da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 24891da177e4SLinus Torvalds unsigned int strhashval; 2490fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = NULL; 24917a8711c9SJ. Bruce Fields __be32 status; 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds if (!check_name(open->op_owner)) 24940f442aa2SJ. Bruce Fields return nfserr_inval; 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 24971da177e4SLinus Torvalds return nfserr_stale_clientid; 24981da177e4SLinus Torvalds 2499506f275fSJ. Bruce Fields strhashval = open_ownerstr_hashval(clientid->cl_id, &open->op_owner); 2500fe0750e5SJ. Bruce Fields oo = find_openstateowner_str(strhashval, open); 2501fe0750e5SJ. Bruce Fields open->op_openowner = oo; 2502fe0750e5SJ. Bruce Fields if (!oo) { 25030f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 25040f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 25050f442aa2SJ. Bruce Fields if (clp == NULL) 25060f442aa2SJ. Bruce Fields return nfserr_expired; 25070f442aa2SJ. Bruce Fields goto renew; 25080f442aa2SJ. Bruce Fields } 2509fe0750e5SJ. Bruce Fields if (!oo->oo_confirmed) { 25100f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2511fe0750e5SJ. Bruce Fields clp = oo->oo_owner.so_client; 2512fe0750e5SJ. Bruce Fields release_openowner(oo); 2513fe0750e5SJ. Bruce Fields open->op_openowner = NULL; 2514ae8b6253SJ. Bruce Fields goto renew; 25150f442aa2SJ. Bruce Fields } 2516fe0750e5SJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, open->op_seqid); 25177a8711c9SJ. Bruce Fields if (status) 25187a8711c9SJ. Bruce Fields return status; 25190f442aa2SJ. Bruce Fields renew: 2520fe0750e5SJ. Bruce Fields if (open->op_openowner == NULL) { 2521fe0750e5SJ. Bruce Fields oo = alloc_init_open_stateowner(strhashval, clp, open); 2522fe0750e5SJ. Bruce Fields if (oo == NULL) 25233e772463SJ. Bruce Fields return nfserr_jukebox; 2524fe0750e5SJ. Bruce Fields open->op_openowner = oo; 25250f442aa2SJ. Bruce Fields } 2526fe0750e5SJ. Bruce Fields list_del_init(&oo->oo_close_lru); 2527fe0750e5SJ. Bruce Fields renew_client(oo->oo_owner.so_client); 25280f442aa2SJ. Bruce Fields return nfs_ok; 25291da177e4SLinus Torvalds } 25301da177e4SLinus Torvalds 2531b37ad28bSAl Viro static inline __be32 25324a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 25334a6e43e6SNeilBrown { 25344a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 25354a6e43e6SNeilBrown return nfserr_openmode; 25364a6e43e6SNeilBrown else 25374a6e43e6SNeilBrown return nfs_ok; 25384a6e43e6SNeilBrown } 25394a6e43e6SNeilBrown 254052f4fb43SNeilBrown static struct nfs4_delegation * 254152f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 254252f4fb43SNeilBrown { 254332b007b4SJ. Bruce Fields struct nfs4_delegation *dp; 254452f4fb43SNeilBrown 2545acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 254632b007b4SJ. Bruce Fields list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) 254732b007b4SJ. Bruce Fields if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) { 2548acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2549acfdf5c3SJ. Bruce Fields return dp; 255052f4fb43SNeilBrown } 255132b007b4SJ. Bruce Fields spin_unlock(&recall_lock); 255232b007b4SJ. Bruce Fields return NULL; 255332b007b4SJ. Bruce Fields } 255452f4fb43SNeilBrown 2555c47d832bSDaniel Mack static int share_access_to_flags(u32 share_access) 255624a0111eSJ. Bruce Fields { 255724a0111eSJ. Bruce Fields share_access &= ~NFS4_SHARE_WANT_MASK; 255824a0111eSJ. Bruce Fields 255924a0111eSJ. Bruce Fields return share_access == NFS4_SHARE_ACCESS_READ ? RD_STATE : WR_STATE; 256024a0111eSJ. Bruce Fields } 256124a0111eSJ. Bruce Fields 2562b37ad28bSAl Viro static __be32 2563567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2564567d9829SNeilBrown struct nfs4_delegation **dp) 2565567d9829SNeilBrown { 2566567d9829SNeilBrown int flags; 2567b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2568567d9829SNeilBrown 2569567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2570567d9829SNeilBrown if (*dp == NULL) 2571c44c5eebSNeilBrown goto out; 257224a0111eSJ. Bruce Fields flags = share_access_to_flags(open->op_share_access); 2573567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2574567d9829SNeilBrown if (status) 2575567d9829SNeilBrown *dp = NULL; 2576c44c5eebSNeilBrown out: 2577c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2578c44c5eebSNeilBrown return nfs_ok; 2579c44c5eebSNeilBrown if (status) 2580c44c5eebSNeilBrown return status; 2581fe0750e5SJ. Bruce Fields open->op_openowner->oo_confirmed = 1; 2582c44c5eebSNeilBrown return nfs_ok; 2583567d9829SNeilBrown } 2584567d9829SNeilBrown 2585b37ad28bSAl Viro static __be32 25861da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 25871da177e4SLinus Torvalds { 25881da177e4SLinus Torvalds struct nfs4_stateid *local; 2589fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = open->op_openowner; 25901da177e4SLinus Torvalds 25918beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 25921da177e4SLinus Torvalds /* ignore lock owners */ 25931da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 25941da177e4SLinus Torvalds continue; 25951da177e4SLinus Torvalds /* remember if we have seen this open owner */ 2596fe0750e5SJ. Bruce Fields if (local->st_stateowner == &oo->oo_owner) 25971da177e4SLinus Torvalds *stpp = local; 25981da177e4SLinus Torvalds /* check for conflicting share reservations */ 25991da177e4SLinus Torvalds if (!test_share(local, open)) 260077eaae8dSJ. Bruce Fields return nfserr_share_denied; 26011da177e4SLinus Torvalds } 260277eaae8dSJ. Bruce Fields return nfs_ok; 26031da177e4SLinus Torvalds } 26041da177e4SLinus Torvalds 26055ac049acSNeilBrown static inline struct nfs4_stateid * 26065ac049acSNeilBrown nfs4_alloc_stateid(void) 26075ac049acSNeilBrown { 26085ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 26095ac049acSNeilBrown } 26105ac049acSNeilBrown 261121fb4016SJ. Bruce Fields static inline int nfs4_access_to_access(u32 nfs4_access) 261221fb4016SJ. Bruce Fields { 261321fb4016SJ. Bruce Fields int flags = 0; 261421fb4016SJ. Bruce Fields 261521fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_READ) 261621fb4016SJ. Bruce Fields flags |= NFSD_MAY_READ; 261721fb4016SJ. Bruce Fields if (nfs4_access & NFS4_SHARE_ACCESS_WRITE) 261821fb4016SJ. Bruce Fields flags |= NFSD_MAY_WRITE; 261921fb4016SJ. Bruce Fields return flags; 262021fb4016SJ. Bruce Fields } 262121fb4016SJ. Bruce Fields 26220c12eaffSCasey Bodley static __be32 nfs4_get_vfs_file(struct svc_rqst *rqstp, struct nfs4_file *fp, 26230c12eaffSCasey Bodley struct svc_fh *cur_fh, struct nfsd4_open *open) 2624f9d7562fSJ. Bruce Fields { 2625f9d7562fSJ. Bruce Fields __be32 status; 26260c12eaffSCasey Bodley int oflag = nfs4_access_to_omode(open->op_share_access); 26270c12eaffSCasey Bodley int access = nfs4_access_to_access(open->op_share_access); 26280c12eaffSCasey Bodley 26290c12eaffSCasey Bodley /* CLAIM_DELEGATE_CUR is used in response to a broken lease; 26300c12eaffSCasey Bodley * allowing it to break the lease and return EAGAIN leaves the 26310c12eaffSCasey Bodley * client unable to make progress in returning the delegation */ 26320c12eaffSCasey Bodley if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 26330c12eaffSCasey Bodley access |= NFSD_MAY_NOT_BREAK_LEASE; 2634f9d7562fSJ. Bruce Fields 2635f9d7562fSJ. Bruce Fields if (!fp->fi_fds[oflag]) { 2636f9d7562fSJ. Bruce Fields status = nfsd_open(rqstp, cur_fh, S_IFREG, access, 2637f9d7562fSJ. Bruce Fields &fp->fi_fds[oflag]); 2638f9d7562fSJ. Bruce Fields if (status) 2639f9d7562fSJ. Bruce Fields return status; 2640f9d7562fSJ. Bruce Fields } 2641f9d7562fSJ. Bruce Fields nfs4_file_get_access(fp, oflag); 2642f9d7562fSJ. Bruce Fields 2643f9d7562fSJ. Bruce Fields return nfs_ok; 2644f9d7562fSJ. Bruce Fields } 2645f9d7562fSJ. Bruce Fields 2646b37ad28bSAl Viro static __be32 26471da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2648f9d7562fSJ. Bruce Fields struct nfs4_file *fp, struct svc_fh *cur_fh, 2649f9d7562fSJ. Bruce Fields struct nfsd4_open *open) 26501da177e4SLinus Torvalds { 26511da177e4SLinus Torvalds struct nfs4_stateid *stp; 2652f9d7562fSJ. Bruce Fields __be32 status; 26531da177e4SLinus Torvalds 26545ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26551da177e4SLinus Torvalds if (stp == NULL) 26563e772463SJ. Bruce Fields return nfserr_jukebox; 26571da177e4SLinus Torvalds 26580c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 26591da177e4SLinus Torvalds if (status) { 26605ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 26611da177e4SLinus Torvalds return status; 26621da177e4SLinus Torvalds } 26631da177e4SLinus Torvalds *stpp = stp; 26641da177e4SLinus Torvalds return 0; 26651da177e4SLinus Torvalds } 26661da177e4SLinus Torvalds 2667b37ad28bSAl Viro static inline __be32 26681da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 26691da177e4SLinus Torvalds struct nfsd4_open *open) 26701da177e4SLinus Torvalds { 26711da177e4SLinus Torvalds struct iattr iattr = { 26721da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 26731da177e4SLinus Torvalds .ia_size = 0, 26741da177e4SLinus Torvalds }; 26751da177e4SLinus Torvalds if (!open->op_truncate) 26761da177e4SLinus Torvalds return 0; 26771da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 26789246585aSAl Viro return nfserr_inval; 26791da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 26801da177e4SLinus Torvalds } 26811da177e4SLinus Torvalds 2682b37ad28bSAl Viro static __be32 2683f9d7562fSJ. 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) 26841da177e4SLinus Torvalds { 26857d947842SJ. Bruce Fields u32 op_share_access = open->op_share_access & ~NFS4_SHARE_WANT_MASK; 26867d947842SJ. Bruce Fields bool new_access; 2687b37ad28bSAl Viro __be32 status; 26881da177e4SLinus Torvalds 26897d947842SJ. Bruce Fields new_access = !test_bit(op_share_access, &stp->st_access_bmap); 2690f9d7562fSJ. Bruce Fields if (new_access) { 26910c12eaffSCasey Bodley status = nfs4_get_vfs_file(rqstp, fp, cur_fh, open); 2692f9d7562fSJ. Bruce Fields if (status) 2693f9d7562fSJ. Bruce Fields return status; 26946c26d08fSJ. Bruce Fields } 26951da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 26961da177e4SLinus Torvalds if (status) { 2697f9d7562fSJ. Bruce Fields if (new_access) { 2698f197c271SJ. Bruce Fields int oflag = nfs4_access_to_omode(op_share_access); 2699f9d7562fSJ. Bruce Fields nfs4_file_put_access(fp, oflag); 2700f9d7562fSJ. Bruce Fields } 27011da177e4SLinus Torvalds return status; 27021da177e4SLinus Torvalds } 27031da177e4SLinus Torvalds /* remember the open */ 270424a0111eSJ. Bruce Fields __set_bit(op_share_access, &stp->st_access_bmap); 2705b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds return nfs_ok; 27081da177e4SLinus Torvalds } 27091da177e4SLinus Torvalds 27101da177e4SLinus Torvalds 27111da177e4SLinus Torvalds static void 271237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 27131da177e4SLinus Torvalds { 2714fe0750e5SJ. Bruce Fields open->op_openowner->oo_confirmed = 1; 2715fe0750e5SJ. Bruce Fields open->op_openowner->oo_owner.so_client->cl_firststate = 1; 27161da177e4SLinus Torvalds } 27171da177e4SLinus Torvalds 271814a24e99SJ. Bruce Fields /* Should we give out recallable state?: */ 271914a24e99SJ. Bruce Fields static bool nfsd4_cb_channel_good(struct nfs4_client *clp) 272014a24e99SJ. Bruce Fields { 272114a24e99SJ. Bruce Fields if (clp->cl_cb_state == NFSD4_CB_UP) 272214a24e99SJ. Bruce Fields return true; 272314a24e99SJ. Bruce Fields /* 272414a24e99SJ. Bruce Fields * In the sessions case, since we don't have to establish a 272514a24e99SJ. Bruce Fields * separate connection for callbacks, we assume it's OK 272614a24e99SJ. Bruce Fields * until we hear otherwise: 272714a24e99SJ. Bruce Fields */ 272814a24e99SJ. Bruce Fields return clp->cl_minorversion && clp->cl_cb_state == NFSD4_CB_UNKNOWN; 272914a24e99SJ. Bruce Fields } 273014a24e99SJ. Bruce Fields 273122d38c4cSJ. Bruce Fields static struct file_lock *nfs4_alloc_init_lease(struct nfs4_delegation *dp, int flag) 273222d38c4cSJ. Bruce Fields { 273322d38c4cSJ. Bruce Fields struct file_lock *fl; 273422d38c4cSJ. Bruce Fields 273522d38c4cSJ. Bruce Fields fl = locks_alloc_lock(); 273622d38c4cSJ. Bruce Fields if (!fl) 273722d38c4cSJ. Bruce Fields return NULL; 273822d38c4cSJ. Bruce Fields locks_init_lock(fl); 273922d38c4cSJ. Bruce Fields fl->fl_lmops = &nfsd_lease_mng_ops; 274022d38c4cSJ. Bruce Fields fl->fl_flags = FL_LEASE; 274122d38c4cSJ. Bruce Fields fl->fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 274222d38c4cSJ. Bruce Fields fl->fl_end = OFFSET_MAX; 2743acfdf5c3SJ. Bruce Fields fl->fl_owner = (fl_owner_t)(dp->dl_file); 274422d38c4cSJ. Bruce Fields fl->fl_pid = current->tgid; 274522d38c4cSJ. Bruce Fields return fl; 274622d38c4cSJ. Bruce Fields } 274722d38c4cSJ. Bruce Fields 2748edab9782SJ. Bruce Fields static int nfs4_setlease(struct nfs4_delegation *dp, int flag) 2749edab9782SJ. Bruce Fields { 2750acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2751edab9782SJ. Bruce Fields struct file_lock *fl; 2752edab9782SJ. Bruce Fields int status; 2753edab9782SJ. Bruce Fields 2754edab9782SJ. Bruce Fields fl = nfs4_alloc_init_lease(dp, flag); 2755edab9782SJ. Bruce Fields if (!fl) 2756edab9782SJ. Bruce Fields return -ENOMEM; 2757acfdf5c3SJ. Bruce Fields fl->fl_file = find_readable_file(fp); 2758acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2759acfdf5c3SJ. Bruce Fields status = vfs_setlease(fl->fl_file, fl->fl_type, &fl); 2760edab9782SJ. Bruce Fields if (status) { 2761acfdf5c3SJ. Bruce Fields list_del_init(&dp->dl_perclnt); 2762edab9782SJ. Bruce Fields locks_free_lock(fl); 2763edab9782SJ. Bruce Fields return -ENOMEM; 2764edab9782SJ. Bruce Fields } 2765acfdf5c3SJ. Bruce Fields fp->fi_lease = fl; 2766acfdf5c3SJ. Bruce Fields fp->fi_deleg_file = fl->fl_file; 2767acfdf5c3SJ. Bruce Fields get_file(fp->fi_deleg_file); 2768acfdf5c3SJ. Bruce Fields atomic_set(&fp->fi_delegees, 1); 2769acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2770acfdf5c3SJ. Bruce Fields return 0; 2771acfdf5c3SJ. Bruce Fields } 2772acfdf5c3SJ. Bruce Fields 2773acfdf5c3SJ. Bruce Fields static int nfs4_set_delegation(struct nfs4_delegation *dp, int flag) 2774acfdf5c3SJ. Bruce Fields { 2775acfdf5c3SJ. Bruce Fields struct nfs4_file *fp = dp->dl_file; 2776acfdf5c3SJ. Bruce Fields 2777acfdf5c3SJ. Bruce Fields if (!fp->fi_lease) 2778acfdf5c3SJ. Bruce Fields return nfs4_setlease(dp, flag); 2779acfdf5c3SJ. Bruce Fields spin_lock(&recall_lock); 2780acfdf5c3SJ. Bruce Fields if (fp->fi_had_conflict) { 2781acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2782acfdf5c3SJ. Bruce Fields return -EAGAIN; 2783acfdf5c3SJ. Bruce Fields } 2784acfdf5c3SJ. Bruce Fields atomic_inc(&fp->fi_delegees); 2785acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perfile, &fp->fi_delegations); 2786acfdf5c3SJ. Bruce Fields spin_unlock(&recall_lock); 2787acfdf5c3SJ. Bruce Fields list_add(&dp->dl_perclnt, &dp->dl_client->cl_delegations); 2788edab9782SJ. Bruce Fields return 0; 2789edab9782SJ. Bruce Fields } 2790edab9782SJ. Bruce Fields 27911da177e4SLinus Torvalds /* 27921da177e4SLinus Torvalds * Attempt to hand out a delegation. 27931da177e4SLinus Torvalds */ 27941da177e4SLinus Torvalds static void 27951da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 27961da177e4SLinus Torvalds { 27971da177e4SLinus Torvalds struct nfs4_delegation *dp; 2798fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo = container_of(stp->st_stateowner, struct nfs4_openowner, oo_owner); 279914a24e99SJ. Bruce Fields int cb_up; 28001da177e4SLinus Torvalds int status, flag = 0; 28011da177e4SLinus Torvalds 2802fe0750e5SJ. Bruce Fields cb_up = nfsd4_cb_channel_good(oo->oo_owner.so_client); 28031da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 28047b190fecSNeilBrown open->op_recall = 0; 28057b190fecSNeilBrown switch (open->op_claim_type) { 28067b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 28072bf23875SJ. Bruce Fields if (!cb_up) 28087b190fecSNeilBrown open->op_recall = 1; 28097b190fecSNeilBrown flag = open->op_delegate_type; 28107b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 28111da177e4SLinus Torvalds goto out; 28127b190fecSNeilBrown break; 28137b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 28147b190fecSNeilBrown /* Let's not give out any delegations till everyone's 28157b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2816af558e33SJ. Bruce Fields if (locks_in_grace()) 28177b190fecSNeilBrown goto out; 2818fe0750e5SJ. Bruce Fields if (!cb_up || !oo->oo_confirmed) 28197b190fecSNeilBrown goto out; 28201da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 28211da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 28221da177e4SLinus Torvalds else 28231da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 28247b190fecSNeilBrown break; 28257b190fecSNeilBrown default: 28267b190fecSNeilBrown goto out; 28277b190fecSNeilBrown } 28281da177e4SLinus Torvalds 2829fe0750e5SJ. Bruce Fields dp = alloc_init_deleg(oo->oo_owner.so_client, stp, fh, flag); 2830dd239cc0SJ. Bruce Fields if (dp == NULL) 2831dd239cc0SJ. Bruce Fields goto out_no_deleg; 2832acfdf5c3SJ. Bruce Fields status = nfs4_set_delegation(dp, flag); 2833edab9782SJ. Bruce Fields if (status) 2834dd239cc0SJ. Bruce Fields goto out_free; 28351da177e4SLinus Torvalds 28361da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 28371da177e4SLinus Torvalds 28388c10cbdbSBenny Halevy dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", 28398c10cbdbSBenny Halevy STATEID_VAL(&dp->dl_stateid)); 28401da177e4SLinus Torvalds out: 28417b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 28427b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 28437b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 28442fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 28451da177e4SLinus Torvalds open->op_delegate_type = flag; 2846dd239cc0SJ. Bruce Fields return; 2847dd239cc0SJ. Bruce Fields out_free: 2848acfdf5c3SJ. Bruce Fields nfs4_put_delegation(dp); 2849dd239cc0SJ. Bruce Fields out_no_deleg: 2850dd239cc0SJ. Bruce Fields flag = NFS4_OPEN_DELEGATE_NONE; 2851dd239cc0SJ. Bruce Fields goto out; 28521da177e4SLinus Torvalds } 28531da177e4SLinus Torvalds 28541da177e4SLinus Torvalds /* 28551da177e4SLinus Torvalds * called with nfs4_lock_state() held. 28561da177e4SLinus Torvalds */ 2857b37ad28bSAl Viro __be32 28581da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 28591da177e4SLinus Torvalds { 28606668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 28611da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 28621da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 28631da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2864567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2865b37ad28bSAl Viro __be32 status; 28661da177e4SLinus Torvalds 28671da177e4SLinus Torvalds status = nfserr_inval; 2868d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2869ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 28701da177e4SLinus Torvalds goto out; 28711da177e4SLinus Torvalds /* 28721da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 28731da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 28741da177e4SLinus Torvalds * If not found, create the nfs4_file struct 28751da177e4SLinus Torvalds */ 28761da177e4SLinus Torvalds fp = find_file(ino); 28771da177e4SLinus Torvalds if (fp) { 28781da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 28791da177e4SLinus Torvalds goto out; 2880c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2881c44c5eebSNeilBrown if (status) 2882c44c5eebSNeilBrown goto out; 28831da177e4SLinus Torvalds } else { 2884c44c5eebSNeilBrown status = nfserr_bad_stateid; 2885c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2886c44c5eebSNeilBrown goto out; 28873e772463SJ. Bruce Fields status = nfserr_jukebox; 28881da177e4SLinus Torvalds fp = alloc_init_file(ino); 28891da177e4SLinus Torvalds if (fp == NULL) 28901da177e4SLinus Torvalds goto out; 28911da177e4SLinus Torvalds } 28921da177e4SLinus Torvalds 28931da177e4SLinus Torvalds /* 28941da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 28951da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 28961da177e4SLinus Torvalds */ 28971da177e4SLinus Torvalds if (stp) { 28981da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 2899f9d7562fSJ. Bruce Fields status = nfs4_upgrade_open(rqstp, fp, current_fh, stp, open); 29001da177e4SLinus Torvalds if (status) 29011da177e4SLinus Torvalds goto out; 29021da177e4SLinus Torvalds } else { 2903f9d7562fSJ. Bruce Fields status = nfs4_new_open(rqstp, &stp, fp, current_fh, open); 2904567d9829SNeilBrown if (status) 29051da177e4SLinus Torvalds goto out; 29061da177e4SLinus Torvalds init_stateid(stp, fp, open); 29071da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 29081da177e4SLinus Torvalds if (status) { 29092283963fSJ. Bruce Fields release_open_stateid(stp); 29101da177e4SLinus Torvalds goto out; 29111da177e4SLinus Torvalds } 29121da177e4SLinus Torvalds } 291373997dc4SJ. Bruce Fields update_stateid(&stp->st_stateid); 29141da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 29151da177e4SLinus Torvalds 29164dc6ec00SJ. Bruce Fields if (nfsd4_has_session(&resp->cstate)) 2917fe0750e5SJ. Bruce Fields open->op_openowner->oo_confirmed = 1; 29186668958fSAndy Adamson 29191da177e4SLinus Torvalds /* 29201da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 29211da177e4SLinus Torvalds * OPEN succeeds even if we fail. 29221da177e4SLinus Torvalds */ 29231da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 29241da177e4SLinus Torvalds 29251da177e4SLinus Torvalds status = nfs_ok; 29261da177e4SLinus Torvalds 29278c10cbdbSBenny Halevy dprintk("%s: stateid=" STATEID_FMT "\n", __func__, 29288c10cbdbSBenny Halevy STATEID_VAL(&stp->st_stateid)); 29291da177e4SLinus Torvalds out: 293013cd2184SNeilBrown if (fp) 293113cd2184SNeilBrown put_nfs4_file(fp); 293237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 293337515177SNeilBrown nfs4_set_claim_prev(open); 29341da177e4SLinus Torvalds /* 29351da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 29361da177e4SLinus Torvalds */ 29371da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 2938fe0750e5SJ. Bruce Fields if (!open->op_openowner->oo_confirmed && 29396668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 29401da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds return status; 29431da177e4SLinus Torvalds } 29441da177e4SLinus Torvalds 2945b37ad28bSAl Viro __be32 2946b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2947b591480bSJ.Bruce Fields clientid_t *clid) 29481da177e4SLinus Torvalds { 29491da177e4SLinus Torvalds struct nfs4_client *clp; 2950b37ad28bSAl Viro __be32 status; 29511da177e4SLinus Torvalds 29521da177e4SLinus Torvalds nfs4_lock_state(); 29531da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 29541da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29551da177e4SLinus Torvalds status = nfserr_stale_clientid; 29561da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 29571da177e4SLinus Torvalds goto out; 29581da177e4SLinus Torvalds clp = find_confirmed_client(clid); 29591da177e4SLinus Torvalds status = nfserr_expired; 29601da177e4SLinus Torvalds if (clp == NULL) { 29611da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 29621da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 29631da177e4SLinus Torvalds goto out; 29641da177e4SLinus Torvalds } 29651da177e4SLinus Torvalds renew_client(clp); 29661da177e4SLinus Torvalds status = nfserr_cb_path_down; 2967ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 296877a3569dSJ. Bruce Fields && clp->cl_cb_state != NFSD4_CB_UP) 29691da177e4SLinus Torvalds goto out; 29701da177e4SLinus Torvalds status = nfs_ok; 29711da177e4SLinus Torvalds out: 29721da177e4SLinus Torvalds nfs4_unlock_state(); 29731da177e4SLinus Torvalds return status; 29741da177e4SLinus Torvalds } 29751da177e4SLinus Torvalds 2976c47d832bSDaniel Mack static struct lock_manager nfsd4_manager = { 2977af558e33SJ. Bruce Fields }; 2978af558e33SJ. Bruce Fields 2979a76b4319SNeilBrown static void 2980af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2981a76b4319SNeilBrown { 2982a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2983c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2984af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2985e46b498cSJ. Bruce Fields /* 2986e46b498cSJ. Bruce Fields * Now that every NFSv4 client has had the chance to recover and 2987e46b498cSJ. Bruce Fields * to see the (possibly new, possibly shorter) lease time, we 2988e46b498cSJ. Bruce Fields * can safely set the next grace time to the current lease time: 2989e46b498cSJ. Bruce Fields */ 2990e46b498cSJ. Bruce Fields nfsd4_grace = nfsd4_lease; 2991a76b4319SNeilBrown } 2992a76b4319SNeilBrown 2993fd39ca9aSNeilBrown static time_t 29941da177e4SLinus Torvalds nfs4_laundromat(void) 29951da177e4SLinus Torvalds { 29961da177e4SLinus Torvalds struct nfs4_client *clp; 2997fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 29981da177e4SLinus Torvalds struct nfs4_delegation *dp; 29991da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 3000cf07d2eaSJ. Bruce Fields time_t cutoff = get_seconds() - nfsd4_lease; 3001cf07d2eaSJ. Bruce Fields time_t t, clientid_val = nfsd4_lease; 3002cf07d2eaSJ. Bruce Fields time_t u, test_val = nfsd4_lease; 30031da177e4SLinus Torvalds 30041da177e4SLinus Torvalds nfs4_lock_state(); 30051da177e4SLinus Torvalds 30061da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 3007af558e33SJ. Bruce Fields if (locks_in_grace()) 3008af558e33SJ. Bruce Fields nfsd4_end_grace(); 300936acb66bSBenny Halevy INIT_LIST_HEAD(&reaplist); 301036acb66bSBenny Halevy spin_lock(&client_lock); 30111da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 30121da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 30131da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 30141da177e4SLinus Torvalds t = clp->cl_time - cutoff; 30151da177e4SLinus Torvalds if (clientid_val > t) 30161da177e4SLinus Torvalds clientid_val = t; 30171da177e4SLinus Torvalds break; 30181da177e4SLinus Torvalds } 3019d7682988SBenny Halevy if (atomic_read(&clp->cl_refcount)) { 3020d7682988SBenny Halevy dprintk("NFSD: client in use (clientid %08x)\n", 3021d7682988SBenny Halevy clp->cl_clientid.cl_id); 3022d7682988SBenny Halevy continue; 3023d7682988SBenny Halevy } 3024d7682988SBenny Halevy unhash_client_locked(clp); 3025d7682988SBenny Halevy list_add(&clp->cl_lru, &reaplist); 302636acb66bSBenny Halevy } 302736acb66bSBenny Halevy spin_unlock(&client_lock); 302836acb66bSBenny Halevy list_for_each_safe(pos, next, &reaplist) { 302936acb66bSBenny Halevy clp = list_entry(pos, struct nfs4_client, cl_lru); 30301da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 30311da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3032c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 30331da177e4SLinus Torvalds expire_client(clp); 30341da177e4SLinus Torvalds } 30351da177e4SLinus Torvalds spin_lock(&recall_lock); 30361da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 30371da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30381da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 30391da177e4SLinus Torvalds u = dp->dl_time - cutoff; 30401da177e4SLinus Torvalds if (test_val > u) 30411da177e4SLinus Torvalds test_val = u; 30421da177e4SLinus Torvalds break; 30431da177e4SLinus Torvalds } 30441da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 30451da177e4SLinus Torvalds } 30461da177e4SLinus Torvalds spin_unlock(&recall_lock); 30471da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 30481da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 30491da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 30501da177e4SLinus Torvalds unhash_delegation(dp); 30511da177e4SLinus Torvalds } 3052cf07d2eaSJ. Bruce Fields test_val = nfsd4_lease; 30531da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 3054fe0750e5SJ. Bruce Fields oo = container_of(pos, struct nfs4_openowner, oo_close_lru); 3055fe0750e5SJ. Bruce Fields if (time_after((unsigned long)oo->oo_time, (unsigned long)cutoff)) { 3056fe0750e5SJ. Bruce Fields u = oo->oo_time - cutoff; 30571da177e4SLinus Torvalds if (test_val > u) 30581da177e4SLinus Torvalds test_val = u; 30591da177e4SLinus Torvalds break; 30601da177e4SLinus Torvalds } 30611da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 3062fe0750e5SJ. Bruce Fields oo->oo_owner.so_id); 3063fe0750e5SJ. Bruce Fields release_openowner(oo); 30641da177e4SLinus Torvalds } 30651da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 30661da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 30671da177e4SLinus Torvalds nfs4_unlock_state(); 30681da177e4SLinus Torvalds return clientid_val; 30691da177e4SLinus Torvalds } 30701da177e4SLinus Torvalds 3071a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 3072a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 3073a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 3074a254b246SHarvey Harrison 3075a254b246SHarvey Harrison static void 3076c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 30771da177e4SLinus Torvalds { 30781da177e4SLinus Torvalds time_t t; 30791da177e4SLinus Torvalds 30801da177e4SLinus Torvalds t = nfs4_laundromat(); 30811da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 308258da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 30831da177e4SLinus Torvalds } 30841da177e4SLinus Torvalds 3085fe0750e5SJ. Bruce Fields static struct nfs4_openowner * search_close_lru(u32 st_id) 3086f8816512SNeilBrown { 3087fe0750e5SJ. Bruce Fields struct nfs4_openowner *local; 30881da177e4SLinus Torvalds 3089fe0750e5SJ. Bruce Fields list_for_each_entry(local, &close_lru, oo_close_lru) { 3090fe0750e5SJ. Bruce Fields if (local->oo_owner.so_id == st_id) 30911da177e4SLinus Torvalds return local; 30921da177e4SLinus Torvalds } 30931da177e4SLinus Torvalds return NULL; 30941da177e4SLinus Torvalds } 30951da177e4SLinus Torvalds 30961da177e4SLinus Torvalds static inline int 30971da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 30981da177e4SLinus Torvalds { 3099f9d7562fSJ. Bruce Fields return fhp->fh_dentry->d_inode != stp->st_file->fi_inode; 31001da177e4SLinus Torvalds } 31011da177e4SLinus Torvalds 31021da177e4SLinus Torvalds static int 31031da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 31041da177e4SLinus Torvalds { 3105e4e83ea4SJ. Bruce Fields if (stateid->si_boot == boot_time) 3106e4e83ea4SJ. Bruce Fields return 0; 31078c10cbdbSBenny Halevy dprintk("NFSD: stale stateid " STATEID_FMT "!\n", 31088c10cbdbSBenny Halevy STATEID_VAL(stateid)); 31091da177e4SLinus Torvalds return 1; 31101da177e4SLinus Torvalds } 31111da177e4SLinus Torvalds 31121da177e4SLinus Torvalds static inline int 31131da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 31141da177e4SLinus Torvalds { 31151da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 31161da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 31171da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 31181da177e4SLinus Torvalds } 31191da177e4SLinus Torvalds 31201da177e4SLinus Torvalds static inline int 31211da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 31221da177e4SLinus Torvalds { 31231da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 31241da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 31251da177e4SLinus Torvalds } 31261da177e4SLinus Torvalds 31271da177e4SLinus Torvalds static 3128b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 31291da177e4SLinus Torvalds { 3130b37ad28bSAl Viro __be32 status = nfserr_openmode; 31311da177e4SLinus Torvalds 313202921914SJ. Bruce Fields /* For lock stateid's, we test the parent open, not the lock: */ 313302921914SJ. Bruce Fields if (stp->st_openstp) 313402921914SJ. Bruce Fields stp = stp->st_openstp; 31351da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 31361da177e4SLinus Torvalds goto out; 31371da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 31381da177e4SLinus Torvalds goto out; 31391da177e4SLinus Torvalds status = nfs_ok; 31401da177e4SLinus Torvalds out: 31411da177e4SLinus Torvalds return status; 31421da177e4SLinus Torvalds } 31431da177e4SLinus Torvalds 3144b37ad28bSAl Viro static inline __be32 31451da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 31461da177e4SLinus Torvalds { 3147203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 31481da177e4SLinus Torvalds return nfs_ok; 3149af558e33SJ. Bruce Fields else if (locks_in_grace()) { 315025985edcSLucas De Marchi /* Answer in remaining cases depends on existence of 31511da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 31521da177e4SLinus Torvalds return nfserr_grace; 31531da177e4SLinus Torvalds } else if (flags & WR_STATE) 31541da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31551da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 31561da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 31571da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 31581da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 31591da177e4SLinus Torvalds } 31601da177e4SLinus Torvalds 31611da177e4SLinus Torvalds /* 31621da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 31631da177e4SLinus Torvalds * that are not able to provide mandatory locking. 31641da177e4SLinus Torvalds */ 31651da177e4SLinus Torvalds static inline int 316618f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 31671da177e4SLinus Torvalds { 3168203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds 317181b82965SJ. Bruce Fields /* Returns true iff a is later than b: */ 317281b82965SJ. Bruce Fields static bool stateid_generation_after(stateid_t *a, stateid_t *b) 317381b82965SJ. Bruce Fields { 317481b82965SJ. Bruce Fields return (s32)a->si_generation - (s32)b->si_generation > 0; 317581b82965SJ. Bruce Fields } 317681b82965SJ. Bruce Fields 317728dde241SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref, bool has_session) 31780836f587SJ. Bruce Fields { 31796668958fSAndy Adamson /* 31806668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 31816668958fSAndy Adamson * when it is zero. 31826668958fSAndy Adamson */ 318328dde241SJ. Bruce Fields if (has_session && in->si_generation == 0) 318481b82965SJ. Bruce Fields return nfs_ok; 318581b82965SJ. Bruce Fields 318681b82965SJ. Bruce Fields if (in->si_generation == ref->si_generation) 318781b82965SJ. Bruce Fields return nfs_ok; 31886668958fSAndy Adamson 31890836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 319081b82965SJ. Bruce Fields if (stateid_generation_after(in, ref)) 31910836f587SJ. Bruce Fields return nfserr_bad_stateid; 31920836f587SJ. Bruce Fields /* 319381b82965SJ. Bruce Fields * However, we could see a stateid from the past, even from a 319481b82965SJ. Bruce Fields * non-buggy client. For example, if the client sends a lock 319581b82965SJ. Bruce Fields * while some IO is outstanding, the lock may bump si_generation 319681b82965SJ. Bruce Fields * while the IO is still in flight. The client could avoid that 319781b82965SJ. Bruce Fields * situation by waiting for responses on all the IO requests, 319881b82965SJ. Bruce Fields * but better performance may result in retrying IO that 319981b82965SJ. Bruce Fields * receives an old_stateid error if requests are rarely 320081b82965SJ. Bruce Fields * reordered in flight: 32010836f587SJ. Bruce Fields */ 32020836f587SJ. Bruce Fields return nfserr_old_stateid; 32030836f587SJ. Bruce Fields } 32040836f587SJ. Bruce Fields 32053e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 32063e633079SJ. Bruce Fields { 32073e633079SJ. Bruce Fields return stateid->si_fileid == 0; 32083e633079SJ. Bruce Fields } 32093e633079SJ. Bruce Fields 321028dde241SJ. Bruce Fields __be32 nfs4_validate_stateid(stateid_t *stateid, bool has_session) 321117456804SBryan Schumaker { 321217456804SBryan Schumaker struct nfs4_stateid *stp = NULL; 321317456804SBryan Schumaker __be32 status = nfserr_stale_stateid; 321417456804SBryan Schumaker 321517456804SBryan Schumaker if (STALE_STATEID(stateid)) 321617456804SBryan Schumaker goto out; 321717456804SBryan Schumaker 321817456804SBryan Schumaker status = nfserr_expired; 3219b79abaddSJ. Bruce Fields stp = find_stateid(stateid, 0); 322017456804SBryan Schumaker if (!stp) 322117456804SBryan Schumaker goto out; 322217456804SBryan Schumaker status = nfserr_bad_stateid; 322317456804SBryan Schumaker 3224fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3225fe0750e5SJ. Bruce Fields && !openowner(stp->st_stateowner)->oo_confirmed) 322617456804SBryan Schumaker goto out; 322717456804SBryan Schumaker 322828dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid, has_session); 322917456804SBryan Schumaker if (status) 323017456804SBryan Schumaker goto out; 323117456804SBryan Schumaker 323217456804SBryan Schumaker status = nfs_ok; 323317456804SBryan Schumaker out: 323417456804SBryan Schumaker return status; 323517456804SBryan Schumaker } 323617456804SBryan Schumaker 32371da177e4SLinus Torvalds /* 32381da177e4SLinus Torvalds * Checks for stateid operations 32391da177e4SLinus Torvalds */ 3240b37ad28bSAl Viro __be32 3241dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 3242dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 32431da177e4SLinus Torvalds { 32441da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 32451da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 3246dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 32471da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 3248b37ad28bSAl Viro __be32 status; 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds if (filpp) 32511da177e4SLinus Torvalds *filpp = NULL; 32521da177e4SLinus Torvalds 325318f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 32541da177e4SLinus Torvalds return nfserr_grace; 32551da177e4SLinus Torvalds 32561da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 32571da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds status = nfserr_stale_stateid; 32601da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 32611da177e4SLinus Torvalds goto out; 32621da177e4SLinus Torvalds 326333515142SJ. Bruce Fields /* 326433515142SJ. Bruce Fields * We assume that any stateid that has the current boot time, 326533515142SJ. Bruce Fields * but that we can't find, is expired: 326633515142SJ. Bruce Fields */ 326733515142SJ. Bruce Fields status = nfserr_expired; 32683e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 3269a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 3270e4e83ea4SJ. Bruce Fields if (!dp) 32711da177e4SLinus Torvalds goto out; 327228dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 32730c2a498fSJ. Bruce Fields if (status) 32740c2a498fSJ. Bruce Fields goto out; 3275dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 3276dc9bf700SJ. Bruce Fields if (status) 3277dc9bf700SJ. Bruce Fields goto out; 3278dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 327943b0178eSDan Carpenter if (filpp) { 3280acfdf5c3SJ. Bruce Fields *filpp = dp->dl_file->fi_deleg_file; 3281f9d7562fSJ. Bruce Fields BUG_ON(!*filpp); 328243b0178eSDan Carpenter } 32831da177e4SLinus Torvalds } else { /* open or lock stateid */ 3284a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 3285e4e83ea4SJ. Bruce Fields if (!stp) 32861da177e4SLinus Torvalds goto out; 328733515142SJ. Bruce Fields status = nfserr_bad_stateid; 32886150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 32891da177e4SLinus Torvalds goto out; 3290fe0750e5SJ. Bruce Fields if (stp->st_stateowner->so_is_open_owner 3291fe0750e5SJ. Bruce Fields && !openowner(stp->st_stateowner)->oo_confirmed) 32921da177e4SLinus Torvalds goto out; 32936668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 329428dde241SJ. Bruce Fields nfsd4_has_session(cstate)); 32950836f587SJ. Bruce Fields if (status) 32961da177e4SLinus Torvalds goto out; 3297a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 3298a4455be0SJ. Bruce Fields if (status) 32991da177e4SLinus Torvalds goto out; 33001da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 3301f9d7562fSJ. Bruce Fields if (filpp) { 3302f9d7562fSJ. Bruce Fields if (flags & RD_STATE) 3303f9d7562fSJ. Bruce Fields *filpp = find_readable_file(stp->st_file); 3304f9d7562fSJ. Bruce Fields else 3305f9d7562fSJ. Bruce Fields *filpp = find_writeable_file(stp->st_file); 3306f9d7562fSJ. Bruce Fields } 33071da177e4SLinus Torvalds } 33081da177e4SLinus Torvalds status = nfs_ok; 33091da177e4SLinus Torvalds out: 33101da177e4SLinus Torvalds return status; 33111da177e4SLinus Torvalds } 33121da177e4SLinus Torvalds 3313e1ca12dfSBryan Schumaker static __be32 3314e1ca12dfSBryan Schumaker nfsd4_free_delegation_stateid(stateid_t *stateid) 3315e1ca12dfSBryan Schumaker { 3316e1ca12dfSBryan Schumaker struct nfs4_delegation *dp = search_for_delegation(stateid); 3317e1ca12dfSBryan Schumaker if (dp) 3318e1ca12dfSBryan Schumaker return nfserr_locks_held; 3319e1ca12dfSBryan Schumaker return nfserr_bad_stateid; 3320e1ca12dfSBryan Schumaker } 3321e1ca12dfSBryan Schumaker 3322e1ca12dfSBryan Schumaker static __be32 3323e1ca12dfSBryan Schumaker nfsd4_free_lock_stateid(struct nfs4_stateid *stp) 3324e1ca12dfSBryan Schumaker { 3325fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lockowner(stp->st_stateowner))) 3326e1ca12dfSBryan Schumaker return nfserr_locks_held; 3327e1ca12dfSBryan Schumaker release_lock_stateid(stp); 3328e1ca12dfSBryan Schumaker return nfs_ok; 3329e1ca12dfSBryan Schumaker } 3330e1ca12dfSBryan Schumaker 3331e1ca12dfSBryan Schumaker /* 333217456804SBryan Schumaker * Test if the stateid is valid 333317456804SBryan Schumaker */ 333417456804SBryan Schumaker __be32 333517456804SBryan Schumaker nfsd4_test_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 333617456804SBryan Schumaker struct nfsd4_test_stateid *test_stateid) 333717456804SBryan Schumaker { 333817456804SBryan Schumaker test_stateid->ts_has_session = nfsd4_has_session(cstate); 333917456804SBryan Schumaker return nfs_ok; 334017456804SBryan Schumaker } 334117456804SBryan Schumaker 334217456804SBryan Schumaker /* 3343e1ca12dfSBryan Schumaker * Free a state id 3344e1ca12dfSBryan Schumaker */ 3345e1ca12dfSBryan Schumaker __be32 3346e1ca12dfSBryan Schumaker nfsd4_free_stateid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3347e1ca12dfSBryan Schumaker struct nfsd4_free_stateid *free_stateid) 3348e1ca12dfSBryan Schumaker { 3349e1ca12dfSBryan Schumaker stateid_t *stateid = &free_stateid->fr_stateid; 3350e1ca12dfSBryan Schumaker struct nfs4_stateid *stp; 3351e1ca12dfSBryan Schumaker __be32 ret; 3352e1ca12dfSBryan Schumaker 3353e1ca12dfSBryan Schumaker nfs4_lock_state(); 3354e1ca12dfSBryan Schumaker if (is_delegation_stateid(stateid)) { 3355e1ca12dfSBryan Schumaker ret = nfsd4_free_delegation_stateid(stateid); 3356e1ca12dfSBryan Schumaker goto out; 3357e1ca12dfSBryan Schumaker } 3358e1ca12dfSBryan Schumaker 3359b79abaddSJ. Bruce Fields stp = find_stateid(stateid, 0); 3360e1ca12dfSBryan Schumaker if (!stp) { 3361e1ca12dfSBryan Schumaker ret = nfserr_bad_stateid; 3362e1ca12dfSBryan Schumaker goto out; 3363e1ca12dfSBryan Schumaker } 336481b82965SJ. Bruce Fields ret = check_stateid_generation(stateid, &stp->st_stateid, 1); 336581b82965SJ. Bruce Fields if (ret) 3366e1ca12dfSBryan Schumaker goto out; 3367e1ca12dfSBryan Schumaker 33685fa0bbb4SJ. Bruce Fields if (stp->st_type == NFS4_OPEN_STID) { 3369e1ca12dfSBryan Schumaker ret = nfserr_locks_held; 3370e1ca12dfSBryan Schumaker goto out; 3371e1ca12dfSBryan Schumaker } else { 3372e1ca12dfSBryan Schumaker ret = nfsd4_free_lock_stateid(stp); 3373e1ca12dfSBryan Schumaker goto out; 3374e1ca12dfSBryan Schumaker } 3375e1ca12dfSBryan Schumaker 3376e1ca12dfSBryan Schumaker out: 3377e1ca12dfSBryan Schumaker nfs4_unlock_state(); 3378e1ca12dfSBryan Schumaker return ret; 3379e1ca12dfSBryan Schumaker } 3380e1ca12dfSBryan Schumaker 33814c4cd222SNeilBrown static inline int 33824c4cd222SNeilBrown setlkflg (int type) 33834c4cd222SNeilBrown { 33844c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 33854c4cd222SNeilBrown RD_STATE : WR_STATE; 33864c4cd222SNeilBrown } 33871da177e4SLinus Torvalds 33881da177e4SLinus Torvalds /* 33891da177e4SLinus Torvalds * Checks for sequence id mutating operations. 33901da177e4SLinus Torvalds */ 3391b37ad28bSAl Viro static __be32 3392dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 3393dd453dfdSBenny Halevy stateid_t *stateid, int flags, 3394b34f27aaSJ. Bruce Fields struct nfs4_stateid **stpp) 33951da177e4SLinus Torvalds { 33961da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3397dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 33980836f587SJ. Bruce Fields __be32 status; 33991da177e4SLinus Torvalds 34008c10cbdbSBenny Halevy dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, 34018c10cbdbSBenny Halevy seqid, STATEID_VAL(stateid)); 34021da177e4SLinus Torvalds 34031da177e4SLinus Torvalds *stpp = 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 */ 3418f4dee24cSJ. Bruce Fields *stpp = find_stateid(stateid, flags); 3419f4dee24cSJ. Bruce Fields if (*stpp == NULL) 342033515142SJ. Bruce Fields return nfserr_expired; 34211da177e4SLinus Torvalds 3422f4dee24cSJ. Bruce Fields sop = (*stpp)->st_stateowner; 3423f3e42237SJ. Bruce Fields cstate->replay_owner = sop; 342439325bd0SJ. Bruce Fields 3425f4dee24cSJ. Bruce Fields if (nfs4_check_fh(current_fh, *stpp)) { 34262fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 34273a4f98bbSNeilBrown return nfserr_bad_stateid; 34281da177e4SLinus Torvalds } 34291da177e4SLinus Torvalds 34307a8711c9SJ. Bruce Fields status = nfsd4_check_seqid(cstate, sop, seqid); 34317a8711c9SJ. Bruce Fields if (status) 34327a8711c9SJ. Bruce Fields return status; 34331da177e4SLinus Torvalds 3434fe0750e5SJ. Bruce Fields if (sop->so_is_open_owner && !openowner(sop)->oo_confirmed 3435fe0750e5SJ. Bruce Fields && !(flags & CONFIRM)) { 34362fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 34373a4f98bbSNeilBrown " confirmed yet!\n"); 34383a4f98bbSNeilBrown return nfserr_bad_stateid; 34391da177e4SLinus Torvalds } 3440f4dee24cSJ. Bruce Fields status = check_stateid_generation(stateid, &(*stpp)->st_stateid, nfsd4_has_session(cstate)); 34410836f587SJ. Bruce Fields if (status) 34420836f587SJ. Bruce Fields return status; 344352fd004eSNeilBrown renew_client(sop->so_client); 34443a4f98bbSNeilBrown return nfs_ok; 34451da177e4SLinus Torvalds } 34461da177e4SLinus Torvalds 3447b37ad28bSAl Viro __be32 3448ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3449a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 34501da177e4SLinus Torvalds { 3451b37ad28bSAl Viro __be32 status; 3452fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 34531da177e4SLinus Torvalds struct nfs4_stateid *stp; 34541da177e4SLinus Torvalds 34551da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3456ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3457ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 34581da177e4SLinus Torvalds 3459ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3460a8cddc5dSJ. Bruce Fields if (status) 3461a8cddc5dSJ. Bruce Fields return status; 34621da177e4SLinus Torvalds 34631da177e4SLinus Torvalds nfs4_lock_state(); 34641da177e4SLinus Torvalds 34659072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, 3466ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 34679072d5c6SJ. Bruce Fields CONFIRM | OPEN_STATE, &stp); 34689072d5c6SJ. Bruce Fields if (status) 34691da177e4SLinus Torvalds goto out; 3470fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 347168b66e82SJ. Bruce Fields status = nfserr_bad_stateid; 3472fe0750e5SJ. Bruce Fields if (oo->oo_confirmed) 347368b66e82SJ. Bruce Fields goto out; 3474fe0750e5SJ. Bruce Fields oo->oo_confirmed = 1; 34751da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 34761da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 34778c10cbdbSBenny Halevy dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", 34788c10cbdbSBenny Halevy __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); 3479c7b9a459SNeilBrown 3480fe0750e5SJ. Bruce Fields nfsd4_create_clid_dir(oo->oo_owner.so_client); 348168b66e82SJ. Bruce Fields status = nfs_ok; 34821da177e4SLinus Torvalds out: 34835ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 34841da177e4SLinus Torvalds nfs4_unlock_state(); 34851da177e4SLinus Torvalds return status; 34861da177e4SLinus Torvalds } 34871da177e4SLinus Torvalds 3488f197c271SJ. Bruce Fields static inline void nfs4_file_downgrade(struct nfs4_stateid *stp, unsigned int to_access) 34891da177e4SLinus Torvalds { 34901da177e4SLinus Torvalds int i; 3491f197c271SJ. Bruce Fields 34921da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 3493f197c271SJ. Bruce Fields if (test_bit(i, &stp->st_access_bmap) && !(i & to_access)) { 3494f197c271SJ. Bruce Fields nfs4_file_put_access(stp->st_file, i); 3495f197c271SJ. Bruce Fields __clear_bit(i, &stp->st_access_bmap); 3496f197c271SJ. Bruce Fields } 34971da177e4SLinus Torvalds } 34981da177e4SLinus Torvalds } 34991da177e4SLinus Torvalds 35001da177e4SLinus Torvalds static void 35011da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 35021da177e4SLinus Torvalds { 35031da177e4SLinus Torvalds int i; 35041da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 35051da177e4SLinus Torvalds if ((i & deny) != i) 35061da177e4SLinus Torvalds __clear_bit(i, bmap); 35071da177e4SLinus Torvalds } 35081da177e4SLinus Torvalds } 35091da177e4SLinus Torvalds 3510b37ad28bSAl Viro __be32 3511ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3512ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3513a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 35141da177e4SLinus Torvalds { 3515b37ad28bSAl Viro __be32 status; 35161da177e4SLinus Torvalds struct nfs4_stateid *stp; 35171da177e4SLinus Torvalds 35181da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3519ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3520ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35211da177e4SLinus Torvalds 3522d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3523ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 35241da177e4SLinus Torvalds return nfserr_inval; 35251da177e4SLinus Torvalds 35261da177e4SLinus Torvalds nfs4_lock_state(); 35279072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, od->od_seqid, 35289072d5c6SJ. Bruce Fields &od->od_stateid, OPEN_STATE, &stp); 35299072d5c6SJ. Bruce Fields if (status) 35301da177e4SLinus Torvalds goto out; 35311da177e4SLinus Torvalds status = nfserr_inval; 35321da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 35331da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 35341da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 35351da177e4SLinus Torvalds goto out; 35361da177e4SLinus Torvalds } 35371da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 35381da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 35391da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 35401da177e4SLinus Torvalds goto out; 35411da177e4SLinus Torvalds } 3542f197c271SJ. Bruce Fields nfs4_file_downgrade(stp, od->od_share_access); 35431da177e4SLinus Torvalds 35441da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 35451da177e4SLinus Torvalds 35461da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 35471da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 35481da177e4SLinus Torvalds status = nfs_ok; 35491da177e4SLinus Torvalds out: 35505ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 35511da177e4SLinus Torvalds nfs4_unlock_state(); 35521da177e4SLinus Torvalds return status; 35531da177e4SLinus Torvalds } 35541da177e4SLinus Torvalds 35551da177e4SLinus Torvalds /* 35561da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 35571da177e4SLinus Torvalds */ 3558b37ad28bSAl Viro __be32 3559ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3560a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 35611da177e4SLinus Torvalds { 3562b37ad28bSAl Viro __be32 status; 3563fe0750e5SJ. Bruce Fields struct nfs4_openowner *oo; 35641da177e4SLinus Torvalds struct nfs4_stateid *stp; 35651da177e4SLinus Torvalds 35661da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3567ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3568ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 35691da177e4SLinus Torvalds 35701da177e4SLinus Torvalds nfs4_lock_state(); 35711da177e4SLinus Torvalds /* check close_lru for replay */ 35729072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, close->cl_seqid, 35731da177e4SLinus Torvalds &close->cl_stateid, 3574f4dee24cSJ. Bruce Fields OPEN_STATE, &stp); 3575f4dee24cSJ. Bruce Fields if (stp == NULL && status == nfserr_expired) { 3576f4dee24cSJ. Bruce Fields /* 3577f4dee24cSJ. Bruce Fields * Also, we should make sure this isn't just the result of 3578f4dee24cSJ. Bruce Fields * a replayed close: 3579f4dee24cSJ. Bruce Fields */ 3580fe0750e5SJ. Bruce Fields oo = search_close_lru(close->cl_stateid.si_stateownerid); 3581f4dee24cSJ. Bruce Fields /* It's not stale; let's assume it's expired: */ 3582fe0750e5SJ. Bruce Fields if (oo == NULL) 3583f4dee24cSJ. Bruce Fields goto out; 3584fe0750e5SJ. Bruce Fields cstate->replay_owner = &oo->oo_owner; 3585fe0750e5SJ. Bruce Fields status = nfsd4_check_seqid(cstate, &oo->oo_owner, close->cl_seqid); 3586f4dee24cSJ. Bruce Fields if (status) 3587f4dee24cSJ. Bruce Fields goto out; 3588f4dee24cSJ. Bruce Fields status = nfserr_bad_seqid; 3589f4dee24cSJ. Bruce Fields } 35909072d5c6SJ. Bruce Fields if (status) 35911da177e4SLinus Torvalds goto out; 3592fe0750e5SJ. Bruce Fields oo = openowner(stp->st_stateowner); 35931da177e4SLinus Torvalds status = nfs_ok; 35941da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 35951da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 35961da177e4SLinus Torvalds 359704ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 35982283963fSJ. Bruce Fields release_open_stateid(stp); 359904ef5954SJ. Bruce Fields 360004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 360104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 360204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 360304ef5954SJ. Bruce Fields */ 3604fe0750e5SJ. Bruce Fields if (list_empty(&oo->oo_owner.so_stateids)) 3605fe0750e5SJ. Bruce Fields move_to_close_lru(oo); 36061da177e4SLinus Torvalds out: 36075ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 36081da177e4SLinus Torvalds nfs4_unlock_state(); 36091da177e4SLinus Torvalds return status; 36101da177e4SLinus Torvalds } 36111da177e4SLinus Torvalds 3612b37ad28bSAl Viro __be32 3613ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3614ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 36151da177e4SLinus Torvalds { 3616203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3617203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3618203a8c8eSJ. Bruce Fields struct inode *inode; 3619b37ad28bSAl Viro __be32 status; 36201da177e4SLinus Torvalds 3621ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3622203a8c8eSJ. Bruce Fields return status; 3623203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 36241da177e4SLinus Torvalds 36251da177e4SLinus Torvalds nfs4_lock_state(); 3626203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3627203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3628203a8c8eSJ. Bruce Fields goto out; 3629203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3630203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3631203a8c8eSJ. Bruce Fields goto out; 36327e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3633203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3634203a8c8eSJ. Bruce Fields goto out; 363533515142SJ. Bruce Fields status = nfserr_expired; 3636203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 3637e4e83ea4SJ. Bruce Fields if (!dp) 3638203a8c8eSJ. Bruce Fields goto out; 363928dde241SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid, nfsd4_has_session(cstate)); 3640203a8c8eSJ. Bruce Fields if (status) 3641203a8c8eSJ. Bruce Fields goto out; 3642203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3643203a8c8eSJ. Bruce Fields 3644203a8c8eSJ. Bruce Fields unhash_delegation(dp); 36451da177e4SLinus Torvalds out: 3646203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3647203a8c8eSJ. Bruce Fields 36481da177e4SLinus Torvalds return status; 36491da177e4SLinus Torvalds } 36501da177e4SLinus Torvalds 36511da177e4SLinus Torvalds 36521da177e4SLinus Torvalds /* 36531da177e4SLinus Torvalds * Lock owner state (byte-range locks) 36541da177e4SLinus Torvalds */ 36551da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 36561da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 36571da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 36581da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 36591da177e4SLinus Torvalds 366087df4de8SBenny Halevy static inline u64 366187df4de8SBenny Halevy end_offset(u64 start, u64 len) 366287df4de8SBenny Halevy { 366387df4de8SBenny Halevy u64 end; 366487df4de8SBenny Halevy 366587df4de8SBenny Halevy end = start + len; 366687df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 366787df4de8SBenny Halevy } 366887df4de8SBenny Halevy 366987df4de8SBenny Halevy /* last octet in a range */ 367087df4de8SBenny Halevy static inline u64 367187df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 367287df4de8SBenny Halevy { 367387df4de8SBenny Halevy u64 end; 367487df4de8SBenny Halevy 367587df4de8SBenny Halevy BUG_ON(!len); 367687df4de8SBenny Halevy end = start + len; 367787df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 367887df4de8SBenny Halevy } 367987df4de8SBenny Halevy 3680ddc04c41SJ. Bruce Fields static unsigned int lockownerid_hashval(u32 id) 3681ddc04c41SJ. Bruce Fields { 3682ddc04c41SJ. Bruce Fields return id & LOCK_HASH_MASK; 3683ddc04c41SJ. Bruce Fields } 36841da177e4SLinus Torvalds 36851da177e4SLinus Torvalds static inline unsigned int 36861da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 36871da177e4SLinus Torvalds struct xdr_netobj *ownername) 36881da177e4SLinus Torvalds { 36891da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 36901da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 36911da177e4SLinus Torvalds & LOCK_HASH_MASK; 36921da177e4SLinus Torvalds } 36931da177e4SLinus Torvalds 36941da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 36951da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 36961da177e4SLinus Torvalds 3697e1ca12dfSBryan Schumaker static int 3698e1ca12dfSBryan Schumaker same_stateid(stateid_t *id_one, stateid_t *id_two) 3699e1ca12dfSBryan Schumaker { 3700e1ca12dfSBryan Schumaker if (id_one->si_stateownerid != id_two->si_stateownerid) 3701e1ca12dfSBryan Schumaker return 0; 3702e1ca12dfSBryan Schumaker return id_one->si_fileid == id_two->si_fileid; 3703e1ca12dfSBryan Schumaker } 3704e1ca12dfSBryan Schumaker 3705b79abaddSJ. Bruce Fields static struct nfs4_stateid *find_stateid(stateid_t *t, int flags) 37061da177e4SLinus Torvalds { 3707b79abaddSJ. Bruce Fields struct nfs4_stateid *s; 37081da177e4SLinus Torvalds unsigned int hashval; 37091da177e4SLinus Torvalds 3710b79abaddSJ. Bruce Fields hashval = stateid_hashval(t->si_stateownerid, t->si_fileid); 3711b79abaddSJ. Bruce Fields list_for_each_entry(s, &stateid_hashtbl[hashval], st_hash) { 3712b79abaddSJ. Bruce Fields if (!same_stateid(&s->st_stateid, t)) 3713b79abaddSJ. Bruce Fields continue; 3714b79abaddSJ. Bruce Fields if (flags & LOCK_STATE && s->st_type != NFS4_LOCK_STID) 37151da177e4SLinus Torvalds return NULL; 3716b79abaddSJ. Bruce Fields if (flags & OPEN_STATE && s->st_type != NFS4_OPEN_STID) 3717b79abaddSJ. Bruce Fields return NULL; 3718b79abaddSJ. Bruce Fields return s; 3719e1ca12dfSBryan Schumaker } 3720e1ca12dfSBryan Schumaker return NULL; 3721e1ca12dfSBryan Schumaker } 3722e1ca12dfSBryan Schumaker 3723e1ca12dfSBryan Schumaker static struct nfs4_delegation * 3724e1ca12dfSBryan Schumaker search_for_delegation(stateid_t *stid) 3725e1ca12dfSBryan Schumaker { 3726e1ca12dfSBryan Schumaker struct nfs4_file *fp; 3727e1ca12dfSBryan Schumaker struct nfs4_delegation *dp; 3728e1ca12dfSBryan Schumaker struct list_head *pos; 3729e1ca12dfSBryan Schumaker int i; 3730e1ca12dfSBryan Schumaker 3731e1ca12dfSBryan Schumaker for (i = 0; i < FILE_HASH_SIZE; i++) { 3732e1ca12dfSBryan Schumaker list_for_each_entry(fp, &file_hashtbl[i], fi_hash) { 3733e1ca12dfSBryan Schumaker list_for_each(pos, &fp->fi_delegations) { 3734e1ca12dfSBryan Schumaker dp = list_entry(pos, struct nfs4_delegation, dl_perfile); 3735e1ca12dfSBryan Schumaker if (same_stateid(&dp->dl_stateid, stid)) 3736e1ca12dfSBryan Schumaker return dp; 3737e1ca12dfSBryan Schumaker } 3738e1ca12dfSBryan Schumaker } 3739e1ca12dfSBryan Schumaker } 3740e1ca12dfSBryan Schumaker return NULL; 3741e1ca12dfSBryan Schumaker } 3742e1ca12dfSBryan Schumaker 37431da177e4SLinus Torvalds static struct nfs4_delegation * 37441da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 37451da177e4SLinus Torvalds { 374613cd2184SNeilBrown struct nfs4_file *fp; 374713cd2184SNeilBrown struct nfs4_delegation *dl; 37481da177e4SLinus Torvalds 37498c10cbdbSBenny Halevy dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, 37508c10cbdbSBenny Halevy STATEID_VAL(stid)); 37511da177e4SLinus Torvalds 37521da177e4SLinus Torvalds fp = find_file(ino); 375313cd2184SNeilBrown if (!fp) 37541da177e4SLinus Torvalds return NULL; 375513cd2184SNeilBrown dl = find_delegation_file(fp, stid); 375613cd2184SNeilBrown put_nfs4_file(fp); 375713cd2184SNeilBrown return dl; 37581da177e4SLinus Torvalds } 37591da177e4SLinus Torvalds 37601da177e4SLinus Torvalds /* 37611da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 37621da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 37631da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 37641da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 37651da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 37661da177e4SLinus Torvalds * the VFS, but this is a very deep change! 37671da177e4SLinus Torvalds */ 37681da177e4SLinus Torvalds static inline void 37691da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 37701da177e4SLinus Torvalds { 37711da177e4SLinus Torvalds if (lock->fl_start < 0) 37721da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 37731da177e4SLinus Torvalds if (lock->fl_end < 0) 37741da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 37751da177e4SLinus Torvalds } 37761da177e4SLinus Torvalds 3777d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3778d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 37797b021967SAlexey Dobriyan static const struct lock_manager_operations nfsd_posix_mng_ops = { 3780d5b9026aSNeilBrown }; 37811da177e4SLinus Torvalds 37821da177e4SLinus Torvalds static inline void 37831da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 37841da177e4SLinus Torvalds { 3785fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 37861da177e4SLinus Torvalds 3787d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3788fe0750e5SJ. Bruce Fields lo = (struct nfs4_lockowner *) fl->fl_owner; 3789fe0750e5SJ. Bruce Fields deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data, 3790fe0750e5SJ. Bruce Fields lo->lo_owner.so_owner.len, GFP_KERNEL); 37917c13f344SJ. Bruce Fields if (!deny->ld_owner.data) 37927c13f344SJ. Bruce Fields /* We just don't care that much */ 37937c13f344SJ. Bruce Fields goto nevermind; 3794fe0750e5SJ. Bruce Fields deny->ld_owner.len = lo->lo_owner.so_owner.len; 3795fe0750e5SJ. Bruce Fields deny->ld_clientid = lo->lo_owner.so_client->cl_clientid; 3796d5b9026aSNeilBrown } else { 37977c13f344SJ. Bruce Fields nevermind: 37987c13f344SJ. Bruce Fields deny->ld_owner.len = 0; 37997c13f344SJ. Bruce Fields deny->ld_owner.data = NULL; 3800d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3801d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 38021da177e4SLinus Torvalds } 38031da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 380487df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 380587df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 38061da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 38071da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 38081da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 38091da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 38101da177e4SLinus Torvalds } 38111da177e4SLinus Torvalds 3812fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 3813fe0750e5SJ. Bruce Fields find_lockowner_str(struct inode *inode, clientid_t *clid, 38141da177e4SLinus Torvalds struct xdr_netobj *owner) 38151da177e4SLinus Torvalds { 38161da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 38171da177e4SLinus Torvalds struct nfs4_stateowner *op; 38181da177e4SLinus Torvalds 38191da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3820599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 3821fe0750e5SJ. Bruce Fields return lockowner(op); 38221da177e4SLinus Torvalds } 38231da177e4SLinus Torvalds return NULL; 38241da177e4SLinus Torvalds } 38251da177e4SLinus Torvalds 3826fe0750e5SJ. Bruce Fields static void hash_lockowner(struct nfs4_lockowner *lo, unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp) 3827ff194bd9SJ. Bruce Fields { 3828ff194bd9SJ. Bruce Fields unsigned int idhashval; 3829ff194bd9SJ. Bruce Fields 3830fe0750e5SJ. Bruce Fields idhashval = lockownerid_hashval(lo->lo_owner.so_id); 3831fe0750e5SJ. Bruce Fields list_add(&lo->lo_owner.so_idhash, &lock_ownerid_hashtbl[idhashval]); 3832fe0750e5SJ. Bruce Fields list_add(&lo->lo_owner.so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3833fe0750e5SJ. Bruce Fields list_add(&lo->lo_perstateid, &open_stp->st_lockowners); 3834ff194bd9SJ. Bruce Fields } 3835ff194bd9SJ. Bruce Fields 38361da177e4SLinus Torvalds /* 38371da177e4SLinus Torvalds * Alloc a lock owner structure. 38381da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 383925985edcSLucas De Marchi * occurred. 38401da177e4SLinus Torvalds * 38411da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 38421da177e4SLinus Torvalds */ 38431da177e4SLinus Torvalds 3844fe0750e5SJ. Bruce Fields static struct nfs4_lockowner * 38451da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 3846fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 38471da177e4SLinus Torvalds 3848fe0750e5SJ. Bruce Fields lo = alloc_stateowner(lockowner_slab, &lock->lk_new_owner, clp); 3849fe0750e5SJ. Bruce Fields if (!lo) 38501da177e4SLinus Torvalds return NULL; 3851fe0750e5SJ. Bruce Fields INIT_LIST_HEAD(&lo->lo_owner.so_stateids); 3852fe0750e5SJ. Bruce Fields lo->lo_owner.so_is_open_owner = 0; 3853b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3854b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3855fe0750e5SJ. Bruce Fields lo->lo_owner.so_seqid = lock->lk_new_lock_seqid + 1; 3856fe0750e5SJ. Bruce Fields hash_lockowner(lo, strhashval, clp, open_stp); 3857fe0750e5SJ. Bruce Fields return lo; 38581da177e4SLinus Torvalds } 38591da177e4SLinus Torvalds 3860fd39ca9aSNeilBrown static struct nfs4_stateid * 3861fe0750e5SJ. Bruce Fields alloc_init_lock_stateid(struct nfs4_lockowner *lo, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 38621da177e4SLinus Torvalds { 38631da177e4SLinus Torvalds struct nfs4_stateid *stp; 3864fe0750e5SJ. Bruce Fields unsigned int hashval = stateid_hashval(lo->lo_owner.so_id, fp->fi_id); 38651da177e4SLinus Torvalds 38665ac049acSNeilBrown stp = nfs4_alloc_stateid(); 38675ac049acSNeilBrown if (stp == NULL) 38681da177e4SLinus Torvalds goto out; 38691da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 38701da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3871ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3872ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 3873b79abaddSJ. Bruce Fields list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 38748beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3875fe0750e5SJ. Bruce Fields list_add(&stp->st_perstateowner, &lo->lo_owner.so_stateids); 3876fe0750e5SJ. Bruce Fields stp->st_stateowner = &lo->lo_owner; 38775fa0bbb4SJ. Bruce Fields stp->st_type = NFS4_LOCK_STID; 387813cd2184SNeilBrown get_nfs4_file(fp); 38791da177e4SLinus Torvalds stp->st_file = fp; 3880e4e83ea4SJ. Bruce Fields stp->st_stateid.si_boot = boot_time; 3881fe0750e5SJ. Bruce Fields stp->st_stateid.si_stateownerid = lo->lo_owner.so_id; 38821da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 388373997dc4SJ. Bruce Fields /* note will be incremented before first return to client: */ 38841da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 38850997b173SJ. Bruce Fields stp->st_access_bmap = 0; 38861da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 38874c4cd222SNeilBrown stp->st_openstp = open_stp; 38881da177e4SLinus Torvalds 38891da177e4SLinus Torvalds out: 38901da177e4SLinus Torvalds return stp; 38911da177e4SLinus Torvalds } 38921da177e4SLinus Torvalds 3893fd39ca9aSNeilBrown static int 38941da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 38951da177e4SLinus Torvalds { 389687df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 38971da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 38981da177e4SLinus Torvalds } 38991da177e4SLinus Torvalds 39000997b173SJ. Bruce Fields static void get_lock_access(struct nfs4_stateid *lock_stp, u32 access) 39010997b173SJ. Bruce Fields { 39020997b173SJ. Bruce Fields struct nfs4_file *fp = lock_stp->st_file; 39030997b173SJ. Bruce Fields int oflag = nfs4_access_to_omode(access); 39040997b173SJ. Bruce Fields 39050997b173SJ. Bruce Fields if (test_bit(access, &lock_stp->st_access_bmap)) 39060997b173SJ. Bruce Fields return; 39070997b173SJ. Bruce Fields nfs4_file_get_access(fp, oflag); 39080997b173SJ. Bruce Fields __set_bit(access, &lock_stp->st_access_bmap); 39090997b173SJ. Bruce Fields } 39100997b173SJ. Bruce Fields 39111da177e4SLinus Torvalds /* 39121da177e4SLinus Torvalds * LOCK operation 39131da177e4SLinus Torvalds */ 3914b37ad28bSAl Viro __be32 3915ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3916a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 39171da177e4SLinus Torvalds { 3918fe0750e5SJ. Bruce Fields struct nfs4_openowner *open_sop = NULL; 3919fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lock_sop = NULL; 39201da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 39217d947842SJ. Bruce Fields struct nfs4_file *fp; 39227d947842SJ. Bruce Fields struct file *filp = NULL; 39231da177e4SLinus Torvalds struct file_lock file_lock; 39248dc7c311SAndy Adamson struct file_lock conflock; 3925b37ad28bSAl Viro __be32 status = 0; 39261da177e4SLinus Torvalds unsigned int strhashval; 3927b34f27aaSJ. Bruce Fields int lkflg; 3928b8dd7b9aSAl Viro int err; 39291da177e4SLinus Torvalds 39301da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 39311da177e4SLinus Torvalds (long long) lock->lk_offset, 39321da177e4SLinus Torvalds (long long) lock->lk_length); 39331da177e4SLinus Torvalds 39341da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 39351da177e4SLinus Torvalds return nfserr_inval; 39361da177e4SLinus Torvalds 3937ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 39388837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3939a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3940a6f6ef2fSAndy Adamson return status; 3941a6f6ef2fSAndy Adamson } 3942a6f6ef2fSAndy Adamson 39431da177e4SLinus Torvalds nfs4_lock_state(); 39441da177e4SLinus Torvalds 39451da177e4SLinus Torvalds if (lock->lk_is_new) { 39461da177e4SLinus Torvalds /* 39471da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3948893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3949893f8770SNeilBrown * lock stateid. 39501da177e4SLinus Torvalds */ 39511da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 39521da177e4SLinus Torvalds 39531da177e4SLinus Torvalds status = nfserr_stale_clientid; 395460adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 395560adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 39561da177e4SLinus Torvalds goto out; 39571da177e4SLinus Torvalds 39581da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3959dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 39601da177e4SLinus Torvalds lock->lk_new_open_seqid, 39611da177e4SLinus Torvalds &lock->lk_new_open_stateid, 39629072d5c6SJ. Bruce Fields OPEN_STATE, &open_stp); 396337515177SNeilBrown if (status) 39641da177e4SLinus Torvalds goto out; 3965fe0750e5SJ. Bruce Fields open_sop = openowner(open_stp->st_stateowner); 3966b34f27aaSJ. Bruce Fields status = nfserr_bad_stateid; 3967b34f27aaSJ. Bruce Fields if (!nfsd4_has_session(cstate) && 3968fe0750e5SJ. Bruce Fields !same_clid(&open_sop->oo_owner.so_client->cl_clientid, 3969b34f27aaSJ. Bruce Fields &lock->v.new.clientid)) 3970b34f27aaSJ. Bruce Fields goto out; 39711da177e4SLinus Torvalds /* create lockowner and lock stateid */ 39721da177e4SLinus Torvalds fp = open_stp->st_file; 39731da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 3974fe0750e5SJ. Bruce Fields open_sop->oo_owner.so_client->cl_clientid.cl_id, 39751da177e4SLinus Torvalds &lock->v.new.owner); 39763e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 39773e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 39783e9e3dbeSNeilBrown * create new stateids)? */ 39793e772463SJ. Bruce Fields status = nfserr_jukebox; 3980b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3981fe0750e5SJ. Bruce Fields open_sop->oo_owner.so_client, open_stp, lock); 3982b59e3c0eSNeil Brown if (lock_sop == NULL) 39831da177e4SLinus Torvalds goto out; 3984b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 39858a280510SJ. Bruce Fields if (lock_stp == NULL) 39861da177e4SLinus Torvalds goto out; 39871da177e4SLinus Torvalds } else { 39881da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3989dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 39901da177e4SLinus Torvalds lock->lk_old_lock_seqid, 39911da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 39929072d5c6SJ. Bruce Fields LOCK_STATE, &lock_stp); 39931da177e4SLinus Torvalds if (status) 39941da177e4SLinus Torvalds goto out; 3995fe0750e5SJ. Bruce Fields lock_sop = lockowner(lock_stp->st_stateowner); 39967d947842SJ. Bruce Fields fp = lock_stp->st_file; 39971da177e4SLinus Torvalds } 39989072d5c6SJ. Bruce Fields /* lock_sop and lock_stp have been created or found */ 39991da177e4SLinus Torvalds 4000b34f27aaSJ. Bruce Fields lkflg = setlkflg(lock->lk_type); 4001b34f27aaSJ. Bruce Fields status = nfs4_check_openmode(lock_stp, lkflg); 4002b34f27aaSJ. Bruce Fields if (status) 4003b34f27aaSJ. Bruce Fields goto out; 4004b34f27aaSJ. Bruce Fields 40050dd395dcSNeilBrown status = nfserr_grace; 4006af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 40070dd395dcSNeilBrown goto out; 40080dd395dcSNeilBrown status = nfserr_no_grace; 4009af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 40100dd395dcSNeilBrown goto out; 40110dd395dcSNeilBrown 40121da177e4SLinus Torvalds locks_init_lock(&file_lock); 40131da177e4SLinus Torvalds switch (lock->lk_type) { 40141da177e4SLinus Torvalds case NFS4_READ_LT: 40151da177e4SLinus Torvalds case NFS4_READW_LT: 4016f9d7562fSJ. Bruce Fields filp = find_readable_file(lock_stp->st_file); 40170997b173SJ. Bruce Fields if (filp) 40180997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_READ); 40191da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 40201da177e4SLinus Torvalds break; 40211da177e4SLinus Torvalds case NFS4_WRITE_LT: 40221da177e4SLinus Torvalds case NFS4_WRITEW_LT: 4023f9d7562fSJ. Bruce Fields filp = find_writeable_file(lock_stp->st_file); 40240997b173SJ. Bruce Fields if (filp) 40250997b173SJ. Bruce Fields get_lock_access(lock_stp, NFS4_SHARE_ACCESS_WRITE); 40261da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 40271da177e4SLinus Torvalds break; 40281da177e4SLinus Torvalds default: 40291da177e4SLinus Torvalds status = nfserr_inval; 40301da177e4SLinus Torvalds goto out; 40311da177e4SLinus Torvalds } 4032f9d7562fSJ. Bruce Fields if (!filp) { 4033f9d7562fSJ. Bruce Fields status = nfserr_openmode; 4034f9d7562fSJ. Bruce Fields goto out; 4035f9d7562fSJ. Bruce Fields } 4036b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 40371da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 40381da177e4SLinus Torvalds file_lock.fl_file = filp; 40391da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4040d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 40411da177e4SLinus Torvalds 40421da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 404387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 40441da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 40451da177e4SLinus Torvalds 40461da177e4SLinus Torvalds /* 40471da177e4SLinus Torvalds * Try to lock the file in the VFS. 40481da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 40491da177e4SLinus Torvalds */ 40501da177e4SLinus Torvalds 4051529d7b2aSJ. Bruce Fields err = vfs_lock_file(filp, F_SETLK, &file_lock, &conflock); 4052b8dd7b9aSAl Viro switch (-err) { 40531da177e4SLinus Torvalds case 0: /* success! */ 40541da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 40551da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 40561da177e4SLinus Torvalds sizeof(stateid_t)); 4057b8dd7b9aSAl Viro status = 0; 4058eb76b3fdSAndy Adamson break; 4059eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 4060eb76b3fdSAndy Adamson status = nfserr_denied; 4061eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 4062eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 4063eb76b3fdSAndy Adamson break; 40641da177e4SLinus Torvalds case (EDEADLK): 40651da177e4SLinus Torvalds status = nfserr_deadlock; 4066eb76b3fdSAndy Adamson break; 40671da177e4SLinus Torvalds default: 4068fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 40693e772463SJ. Bruce Fields status = nfserrno(err); 4070eb76b3fdSAndy Adamson break; 40711da177e4SLinus Torvalds } 40721da177e4SLinus Torvalds out: 40738a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 4074f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 40755ec094c1SJ. Bruce Fields if (!cstate->replay_owner) 40761da177e4SLinus Torvalds nfs4_unlock_state(); 40771da177e4SLinus Torvalds return status; 40781da177e4SLinus Torvalds } 40791da177e4SLinus Torvalds 40801da177e4SLinus Torvalds /* 408155ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 408255ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 408355ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 408455ef1274SJ. Bruce Fields * inode operation.) 408555ef1274SJ. Bruce Fields */ 408655ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 408755ef1274SJ. Bruce Fields { 408855ef1274SJ. Bruce Fields struct file *file; 408955ef1274SJ. Bruce Fields int err; 409055ef1274SJ. Bruce Fields 409155ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 409255ef1274SJ. Bruce Fields if (err) 409355ef1274SJ. Bruce Fields return err; 409455ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 409555ef1274SJ. Bruce Fields nfsd_close(file); 409655ef1274SJ. Bruce Fields return err; 409755ef1274SJ. Bruce Fields } 409855ef1274SJ. Bruce Fields 409955ef1274SJ. Bruce Fields /* 41001da177e4SLinus Torvalds * LOCKT operation 41011da177e4SLinus Torvalds */ 4102b37ad28bSAl Viro __be32 4103ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4104ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 41051da177e4SLinus Torvalds { 41061da177e4SLinus Torvalds struct inode *inode; 41071da177e4SLinus Torvalds struct file_lock file_lock; 4108fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 4109fd85b817SMarc Eshel int error; 4110b37ad28bSAl Viro __be32 status; 41111da177e4SLinus Torvalds 4112af558e33SJ. Bruce Fields if (locks_in_grace()) 41131da177e4SLinus Torvalds return nfserr_grace; 41141da177e4SLinus Torvalds 41151da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 41161da177e4SLinus Torvalds return nfserr_inval; 41171da177e4SLinus Torvalds 41181da177e4SLinus Torvalds nfs4_lock_state(); 41191da177e4SLinus Torvalds 41201da177e4SLinus Torvalds status = nfserr_stale_clientid; 412160adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 41221da177e4SLinus Torvalds goto out; 41231da177e4SLinus Torvalds 412475c096f7SJ. Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 41251da177e4SLinus Torvalds goto out; 41261da177e4SLinus Torvalds 4127ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 41281da177e4SLinus Torvalds locks_init_lock(&file_lock); 41291da177e4SLinus Torvalds switch (lockt->lt_type) { 41301da177e4SLinus Torvalds case NFS4_READ_LT: 41311da177e4SLinus Torvalds case NFS4_READW_LT: 41321da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 41331da177e4SLinus Torvalds break; 41341da177e4SLinus Torvalds case NFS4_WRITE_LT: 41351da177e4SLinus Torvalds case NFS4_WRITEW_LT: 41361da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 41371da177e4SLinus Torvalds break; 41381da177e4SLinus Torvalds default: 41392fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 41401da177e4SLinus Torvalds status = nfserr_inval; 41411da177e4SLinus Torvalds goto out; 41421da177e4SLinus Torvalds } 41431da177e4SLinus Torvalds 4144fe0750e5SJ. Bruce Fields lo = find_lockowner_str(inode, &lockt->lt_clientid, &lockt->lt_owner); 4145fe0750e5SJ. Bruce Fields if (lo) 4146fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lo; 41471da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 41481da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 41491da177e4SLinus Torvalds 41501da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 415187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 41521da177e4SLinus Torvalds 41531da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 41541da177e4SLinus Torvalds 41551da177e4SLinus Torvalds status = nfs_ok; 415655ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 4157fd85b817SMarc Eshel if (error) { 4158fd85b817SMarc Eshel status = nfserrno(error); 4159fd85b817SMarc Eshel goto out; 4160fd85b817SMarc Eshel } 41619d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 41621da177e4SLinus Torvalds status = nfserr_denied; 41639d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 41641da177e4SLinus Torvalds } 41651da177e4SLinus Torvalds out: 41661da177e4SLinus Torvalds nfs4_unlock_state(); 41671da177e4SLinus Torvalds return status; 41681da177e4SLinus Torvalds } 41691da177e4SLinus Torvalds 4170b37ad28bSAl Viro __be32 4171ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 4172a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 41731da177e4SLinus Torvalds { 41741da177e4SLinus Torvalds struct nfs4_stateid *stp; 41751da177e4SLinus Torvalds struct file *filp = NULL; 41761da177e4SLinus Torvalds struct file_lock file_lock; 4177b37ad28bSAl Viro __be32 status; 4178b8dd7b9aSAl Viro int err; 41791da177e4SLinus Torvalds 41801da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 41811da177e4SLinus Torvalds (long long) locku->lu_offset, 41821da177e4SLinus Torvalds (long long) locku->lu_length); 41831da177e4SLinus Torvalds 41841da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 41851da177e4SLinus Torvalds return nfserr_inval; 41861da177e4SLinus Torvalds 41871da177e4SLinus Torvalds nfs4_lock_state(); 41881da177e4SLinus Torvalds 41899072d5c6SJ. Bruce Fields status = nfs4_preprocess_seqid_op(cstate, locku->lu_seqid, 41909072d5c6SJ. Bruce Fields &locku->lu_stateid, LOCK_STATE, &stp); 41919072d5c6SJ. Bruce Fields if (status) 41921da177e4SLinus Torvalds goto out; 4193f9d7562fSJ. Bruce Fields filp = find_any_file(stp->st_file); 4194f9d7562fSJ. Bruce Fields if (!filp) { 4195f9d7562fSJ. Bruce Fields status = nfserr_lock_range; 4196f9d7562fSJ. Bruce Fields goto out; 4197f9d7562fSJ. Bruce Fields } 41981da177e4SLinus Torvalds BUG_ON(!filp); 41991da177e4SLinus Torvalds locks_init_lock(&file_lock); 42001da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 4201fe0750e5SJ. Bruce Fields file_lock.fl_owner = (fl_owner_t)lockowner(stp->st_stateowner); 42021da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 42031da177e4SLinus Torvalds file_lock.fl_file = filp; 42041da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 4205d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 42061da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 42071da177e4SLinus Torvalds 420887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 42091da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 42101da177e4SLinus Torvalds 42111da177e4SLinus Torvalds /* 42121da177e4SLinus Torvalds * Try to unlock the file in the VFS. 42131da177e4SLinus Torvalds */ 4214fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 4215b8dd7b9aSAl Viro if (err) { 4216fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 42171da177e4SLinus Torvalds goto out_nfserr; 42181da177e4SLinus Torvalds } 42191da177e4SLinus Torvalds /* 42201da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 42211da177e4SLinus Torvalds */ 42221da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 42231da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 42241da177e4SLinus Torvalds 42251da177e4SLinus Torvalds out: 42261da177e4SLinus Torvalds nfs4_unlock_state(); 42271da177e4SLinus Torvalds return status; 42281da177e4SLinus Torvalds 42291da177e4SLinus Torvalds out_nfserr: 4230b8dd7b9aSAl Viro status = nfserrno(err); 42311da177e4SLinus Torvalds goto out; 42321da177e4SLinus Torvalds } 42331da177e4SLinus Torvalds 42341da177e4SLinus Torvalds /* 42351da177e4SLinus Torvalds * returns 42361da177e4SLinus Torvalds * 1: locks held by lockowner 42371da177e4SLinus Torvalds * 0: no locks held by lockowner 42381da177e4SLinus Torvalds */ 42391da177e4SLinus Torvalds static int 4240fe0750e5SJ. Bruce Fields check_for_locks(struct nfs4_file *filp, struct nfs4_lockowner *lowner) 42411da177e4SLinus Torvalds { 42421da177e4SLinus Torvalds struct file_lock **flpp; 4243f9d7562fSJ. Bruce Fields struct inode *inode = filp->fi_inode; 42441da177e4SLinus Torvalds int status = 0; 42451da177e4SLinus Torvalds 4246b89f4321SArnd Bergmann lock_flocks(); 42471da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 4248796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 42491da177e4SLinus Torvalds status = 1; 42501da177e4SLinus Torvalds goto out; 42511da177e4SLinus Torvalds } 4252796dadfdSJ. Bruce Fields } 42531da177e4SLinus Torvalds out: 4254b89f4321SArnd Bergmann unlock_flocks(); 42551da177e4SLinus Torvalds return status; 42561da177e4SLinus Torvalds } 42571da177e4SLinus Torvalds 4258b37ad28bSAl Viro __be32 4259b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 4260b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 4261b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 42621da177e4SLinus Torvalds { 42631da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 42643e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 4265fe0750e5SJ. Bruce Fields struct nfs4_lockowner *lo; 42663e9e3dbeSNeilBrown struct nfs4_stateid *stp; 42671da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 42683e9e3dbeSNeilBrown struct list_head matches; 42693e9e3dbeSNeilBrown int i; 4270b37ad28bSAl Viro __be32 status; 42711da177e4SLinus Torvalds 42721da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 42731da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 42741da177e4SLinus Torvalds 42751da177e4SLinus Torvalds /* XXX check for lease expiration */ 42761da177e4SLinus Torvalds 42771da177e4SLinus Torvalds status = nfserr_stale_clientid; 4278849823c5SNeil Brown if (STALE_CLIENTID(clid)) 42791da177e4SLinus Torvalds return status; 42801da177e4SLinus Torvalds 42811da177e4SLinus Torvalds nfs4_lock_state(); 42821da177e4SLinus Torvalds 42831da177e4SLinus Torvalds status = nfserr_locks_held; 42843e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 42853e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 42863e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 42873e9e3dbeSNeilBrown * data structures. */ 42883e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 42893e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 42903e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 4291599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 42923e9e3dbeSNeilBrown continue; 42933e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 4294ea1da636SNeilBrown st_perstateowner) { 4295fe0750e5SJ. Bruce Fields lo = lockowner(sop); 4296fe0750e5SJ. Bruce Fields if (check_for_locks(stp->st_file, lo)) 42971da177e4SLinus Torvalds goto out; 4298fe0750e5SJ. Bruce Fields list_add(&lo->lo_list, &matches); 42991da177e4SLinus Torvalds } 43003e9e3dbeSNeilBrown } 43013e9e3dbeSNeilBrown } 43023e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 43033e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 43043e9e3dbeSNeilBrown * have been checked. */ 43051da177e4SLinus Torvalds status = nfs_ok; 43060fa822e4SNeilBrown while (!list_empty(&matches)) { 4307fe0750e5SJ. Bruce Fields lo = list_entry(matches.next, struct nfs4_lockowner, 4308fe0750e5SJ. Bruce Fields lo_list); 43090fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 43100fa822e4SNeilBrown * for openowners. */ 4311fe0750e5SJ. Bruce Fields list_del(&lo->lo_list); 4312fe0750e5SJ. Bruce Fields release_lockowner(lo); 43131da177e4SLinus Torvalds } 43141da177e4SLinus Torvalds out: 43151da177e4SLinus Torvalds nfs4_unlock_state(); 43161da177e4SLinus Torvalds return status; 43171da177e4SLinus Torvalds } 43181da177e4SLinus Torvalds 43191da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 4320a55370a3SNeilBrown alloc_reclaim(void) 43211da177e4SLinus Torvalds { 4322a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 43231da177e4SLinus Torvalds } 43241da177e4SLinus Torvalds 4325c7b9a459SNeilBrown int 4326a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 4327c7b9a459SNeilBrown { 4328c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 4329c7b9a459SNeilBrown struct nfs4_client *clp; 4330c7b9a459SNeilBrown 4331e203d506SJ. Bruce Fields clp = find_confirmed_client_by_str(name, strhashval); 4332c7b9a459SNeilBrown return clp ? 1 : 0; 4333c7b9a459SNeilBrown } 4334c7b9a459SNeilBrown 43351da177e4SLinus Torvalds /* 43361da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 43371da177e4SLinus Torvalds */ 4338190e4fbfSNeilBrown int 4339190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 43401da177e4SLinus Torvalds { 43411da177e4SLinus Torvalds unsigned int strhashval; 43421da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43431da177e4SLinus Torvalds 4344a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 4345a55370a3SNeilBrown crp = alloc_reclaim(); 43461da177e4SLinus Torvalds if (!crp) 43471da177e4SLinus Torvalds return 0; 4348a55370a3SNeilBrown strhashval = clientstr_hashval(name); 43491da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 43501da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 4351a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 43521da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 43531da177e4SLinus Torvalds return 1; 43541da177e4SLinus Torvalds } 43551da177e4SLinus Torvalds 43561da177e4SLinus Torvalds static void 43571da177e4SLinus Torvalds nfs4_release_reclaim(void) 43581da177e4SLinus Torvalds { 43591da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43601da177e4SLinus Torvalds int i; 43611da177e4SLinus Torvalds 43621da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 43631da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 43641da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 43651da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 43661da177e4SLinus Torvalds list_del(&crp->cr_strhash); 43671da177e4SLinus Torvalds kfree(crp); 43681da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 43691da177e4SLinus Torvalds } 43701da177e4SLinus Torvalds } 43711da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 43721da177e4SLinus Torvalds } 43731da177e4SLinus Torvalds 43741da177e4SLinus Torvalds /* 43751da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 4376fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 43771da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 43781da177e4SLinus Torvalds { 43791da177e4SLinus Torvalds unsigned int strhashval; 43801da177e4SLinus Torvalds struct nfs4_client *clp; 43811da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 43821da177e4SLinus Torvalds 43831da177e4SLinus Torvalds 43841da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 43851da177e4SLinus Torvalds clp = find_confirmed_client(clid); 43861da177e4SLinus Torvalds if (clp == NULL) 43871da177e4SLinus Torvalds return NULL; 43881da177e4SLinus Torvalds 4389a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 4390a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 4391a55370a3SNeilBrown clp->cl_recdir); 43921da177e4SLinus Torvalds 43931da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 4394a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 43951da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 4396a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 43971da177e4SLinus Torvalds return crp; 43981da177e4SLinus Torvalds } 43991da177e4SLinus Torvalds } 44001da177e4SLinus Torvalds return NULL; 44011da177e4SLinus Torvalds } 44021da177e4SLinus Torvalds 44031da177e4SLinus Torvalds /* 44041da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 44051da177e4SLinus Torvalds */ 4406b37ad28bSAl Viro __be32 44071da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 44081da177e4SLinus Torvalds { 4409dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 44101da177e4SLinus Torvalds } 44111da177e4SLinus Torvalds 4412ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 44131da177e4SLinus Torvalds 4414e8ff2a84SJ. Bruce Fields int 4415ac4d8ff2SNeilBrown nfs4_state_init(void) 44161da177e4SLinus Torvalds { 4417e8ff2a84SJ. Bruce Fields int i, status; 44181da177e4SLinus Torvalds 4419e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4420e8ff2a84SJ. Bruce Fields if (status) 4421e8ff2a84SJ. Bruce Fields return status; 44221da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 44231da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 44241da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 44251da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 44261da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 442702cb2858SWang Chen INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 44281da177e4SLinus Torvalds } 44295282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 44305282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 44311da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 44321da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 44331da177e4SLinus Torvalds } 4434506f275fSJ. Bruce Fields for (i = 0; i < OPEN_OWNER_HASH_SIZE; i++) { 4435506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerstr_hashtbl[i]); 4436506f275fSJ. Bruce Fields INIT_LIST_HEAD(&open_ownerid_hashtbl[i]); 44371da177e4SLinus Torvalds } 4438b79abaddSJ. Bruce Fields for (i = 0; i < STATEID_HASH_SIZE; i++) 44391da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 44401da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 44411da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 44421da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 44431da177e4SLinus Torvalds } 44441da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 44451da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 44461da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 44471da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4448ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4449e8ff2a84SJ. Bruce Fields return 0; 4450ac4d8ff2SNeilBrown } 4451ac4d8ff2SNeilBrown 4452190e4fbfSNeilBrown static void 4453190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4454190e4fbfSNeilBrown { 4455190e4fbfSNeilBrown int status; 4456190e4fbfSNeilBrown 44570964a3d3SNeilBrown nfs4_lock_state(); 445848483bf2SJ. Bruce Fields nfsd4_init_recdir(); 4459190e4fbfSNeilBrown status = nfsd4_recdir_load(); 44600964a3d3SNeilBrown nfs4_unlock_state(); 4461190e4fbfSNeilBrown if (status) 4462190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4463190e4fbfSNeilBrown } 4464190e4fbfSNeilBrown 4465c2f1a551SMeelap Shah /* 4466c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4467c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4468c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4469c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4470c2f1a551SMeelap Shah * 4471c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4472c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4473c2f1a551SMeelap Shah */ 4474c2f1a551SMeelap Shah static void 4475c2f1a551SMeelap Shah set_max_delegations(void) 4476c2f1a551SMeelap Shah { 4477c2f1a551SMeelap Shah /* 4478c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4479c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4480c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4481c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4482c2f1a551SMeelap Shah */ 4483c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4484c2f1a551SMeelap Shah } 4485c2f1a551SMeelap Shah 4486ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4487ac4d8ff2SNeilBrown 448829ab23ccSJ. Bruce Fields static int 4489ac4d8ff2SNeilBrown __nfs4_state_start(void) 4490ac4d8ff2SNeilBrown { 4491b5a1a81eSJ. Bruce Fields int ret; 4492b5a1a81eSJ. Bruce Fields 44931da177e4SLinus Torvalds boot_time = get_seconds(); 4494af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 44959a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 4496e46b498cSJ. Bruce Fields nfsd4_grace); 4497b5a1a81eSJ. Bruce Fields ret = set_callback_cred(); 4498b5a1a81eSJ. Bruce Fields if (ret) 4499b5a1a81eSJ. Bruce Fields return -ENOMEM; 450058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 450129ab23ccSJ. Bruce Fields if (laundry_wq == NULL) 450229ab23ccSJ. Bruce Fields return -ENOMEM; 4503b5a1a81eSJ. Bruce Fields ret = nfsd4_create_callback_queue(); 4504b5a1a81eSJ. Bruce Fields if (ret) 4505b5a1a81eSJ. Bruce Fields goto out_free_laundry; 4506e46b498cSJ. Bruce Fields queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); 4507c2f1a551SMeelap Shah set_max_delegations(); 4508b5a1a81eSJ. Bruce Fields return 0; 4509b5a1a81eSJ. Bruce Fields out_free_laundry: 4510b5a1a81eSJ. Bruce Fields destroy_workqueue(laundry_wq); 4511b5a1a81eSJ. Bruce Fields return ret; 45121da177e4SLinus Torvalds } 45131da177e4SLinus Torvalds 451429ab23ccSJ. Bruce Fields int 451576a3550eSNeilBrown nfs4_state_start(void) 45161da177e4SLinus Torvalds { 4517190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 45184ad9a344SJeff Layton return __nfs4_state_start(); 45191da177e4SLinus Torvalds } 45201da177e4SLinus Torvalds 45211da177e4SLinus Torvalds static void 45221da177e4SLinus Torvalds __nfs4_state_shutdown(void) 45231da177e4SLinus Torvalds { 45241da177e4SLinus Torvalds int i; 45251da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 45261da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 45271da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 45281da177e4SLinus Torvalds 45291da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 45301da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 45311da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 45321da177e4SLinus Torvalds expire_client(clp); 45331da177e4SLinus Torvalds } 45341da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 45351da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 45361da177e4SLinus Torvalds expire_client(clp); 45371da177e4SLinus Torvalds } 45381da177e4SLinus Torvalds } 45391da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 45401da177e4SLinus Torvalds spin_lock(&recall_lock); 45411da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 45421da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 45431da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 45441da177e4SLinus Torvalds } 45451da177e4SLinus Torvalds spin_unlock(&recall_lock); 45461da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 45471da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 45481da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 45491da177e4SLinus Torvalds unhash_delegation(dp); 45501da177e4SLinus Torvalds } 45511da177e4SLinus Torvalds 4552190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 45531da177e4SLinus Torvalds } 45541da177e4SLinus Torvalds 45551da177e4SLinus Torvalds void 45561da177e4SLinus Torvalds nfs4_state_shutdown(void) 45571da177e4SLinus Torvalds { 4558afe2c511STejun Heo cancel_delayed_work_sync(&laundromat_work); 45595e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 45602c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 45611da177e4SLinus Torvalds nfs4_lock_state(); 45621da177e4SLinus Torvalds nfs4_release_reclaim(); 45631da177e4SLinus Torvalds __nfs4_state_shutdown(); 45641da177e4SLinus Torvalds nfs4_unlock_state(); 4565c3935e30SJ. Bruce Fields nfsd4_destroy_callback_queue(); 45661da177e4SLinus Torvalds } 4567