11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfsd/nfs4state.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 51da177e4SLinus Torvalds * All rights reserved. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 81da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 111da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 121da177e4SLinus Torvalds * are met: 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 161da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 171da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 181da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 191da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 201da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 211da177e4SLinus Torvalds * from this software without specific prior written permission. 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 241da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 251da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 261da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 271da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 281da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 291da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 301da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 311da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 321da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 331da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 341da177e4SLinus Torvalds * 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <linux/param.h> 381da177e4SLinus Torvalds #include <linux/major.h> 391da177e4SLinus Torvalds #include <linux/slab.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <linux/sunrpc/svc.h> 421da177e4SLinus Torvalds #include <linux/nfsd/nfsd.h> 431da177e4SLinus Torvalds #include <linux/nfsd/cache.h> 44aceaf78dSDave Hansen #include <linux/file.h> 451da177e4SLinus Torvalds #include <linux/mount.h> 461da177e4SLinus Torvalds #include <linux/workqueue.h> 471da177e4SLinus Torvalds #include <linux/smp_lock.h> 481da177e4SLinus Torvalds #include <linux/kthread.h> 491da177e4SLinus Torvalds #include <linux/nfs4.h> 501da177e4SLinus Torvalds #include <linux/nfsd/state.h> 511da177e4SLinus Torvalds #include <linux/nfsd/xdr4.h> 520964a3d3SNeilBrown #include <linux/namei.h> 53c2f1a551SMeelap Shah #include <linux/swap.h> 54353ab6e9SIngo Molnar #include <linux/mutex.h> 55fd85b817SMarc Eshel #include <linux/lockd/bind.h> 569a8db97eSMarc Eshel #include <linux/module.h> 5768e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* Globals */ 621da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 63d99a05adSNeilBrown static time_t user_lease_time = 90; 64fd39ca9aSNeilBrown static time_t boot_time; 651da177e4SLinus Torvalds static u32 current_ownerid = 1; 661da177e4SLinus Torvalds static u32 current_fileid = 1; 671da177e4SLinus Torvalds static u32 current_delegid = 1; 681da177e4SLinus Torvalds static u32 nfs4_init; 69fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 70fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 71fd39ca9aSNeilBrown 72fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 73fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 771da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 780964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 790964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 801da177e4SLinus Torvalds 818b671b80SJ. Bruce Fields /* Locking: */ 828b671b80SJ. Bruce Fields 838b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 84353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 851da177e4SLinus Torvalds 868b671b80SJ. Bruce Fields /* 878b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 888b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 898b671b80SJ. Bruce Fields * eventually cover more: 908b671b80SJ. Bruce Fields */ 918b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 928b671b80SJ. Bruce Fields 93e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 94e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 95e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 96e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 97e60d4398SNeilBrown 981da177e4SLinus Torvalds void 991da177e4SLinus Torvalds nfs4_lock_state(void) 1001da177e4SLinus Torvalds { 101353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds void 1051da177e4SLinus Torvalds nfs4_unlock_state(void) 1061da177e4SLinus Torvalds { 107353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static inline u32 1111da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1121da177e4SLinus Torvalds { 1131da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds u32 x = 0; 1161da177e4SLinus Torvalds while (nbytes--) { 1171da177e4SLinus Torvalds x *= 37; 1181da177e4SLinus Torvalds x += *cptr++; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds return x; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static struct list_head del_recall_lru; 1241da177e4SLinus Torvalds 12513cd2184SNeilBrown static inline void 12613cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 12713cd2184SNeilBrown { 1288b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1298b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1308b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1318b671b80SJ. Bruce Fields iput(fi->fi_inode); 1328b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1338b671b80SJ. Bruce Fields } 13413cd2184SNeilBrown } 13513cd2184SNeilBrown 13613cd2184SNeilBrown static inline void 13713cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 13813cd2184SNeilBrown { 1398b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 14013cd2184SNeilBrown } 14113cd2184SNeilBrown 142ef0f3390SNeilBrown static int num_delegations; 143c2f1a551SMeelap Shah unsigned int max_delegations; 144ef0f3390SNeilBrown 145ef0f3390SNeilBrown /* 146ef0f3390SNeilBrown * Open owner state (share locks) 147ef0f3390SNeilBrown */ 148ef0f3390SNeilBrown 149ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 150ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 151ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 152ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 153ef0f3390SNeilBrown 154ef0f3390SNeilBrown #define ownerid_hashval(id) \ 155ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 156ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 157ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 160ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 161ef0f3390SNeilBrown 162ef0f3390SNeilBrown /* hash table for nfs4_file */ 163ef0f3390SNeilBrown #define FILE_HASH_BITS 8 164ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 165ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 166ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 167ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 168ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 169ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 170ef0f3390SNeilBrown 171ef0f3390SNeilBrown #define file_hashval(x) \ 172ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 173ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 174ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 175ef0f3390SNeilBrown 176ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 177ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 178ef0f3390SNeilBrown 1791da177e4SLinus Torvalds static struct nfs4_delegation * 1801da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct nfs4_delegation *dp; 1831da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1841da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 18747f9940cSMeelap Shah if (fp->fi_had_conflict) 18847f9940cSMeelap Shah return NULL; 189c2f1a551SMeelap Shah if (num_delegations > max_delegations) 190ef0f3390SNeilBrown return NULL; 1915b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1925b2d21c1SNeilBrown if (dp == NULL) 1931da177e4SLinus Torvalds return dp; 194ef0f3390SNeilBrown num_delegations++; 195ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 196ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1971da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1981da177e4SLinus Torvalds dp->dl_client = clp; 19913cd2184SNeilBrown get_nfs4_file(fp); 2001da177e4SLinus Torvalds dp->dl_file = fp; 2011da177e4SLinus Torvalds dp->dl_flock = NULL; 2021da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2031da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2041da177e4SLinus Torvalds dp->dl_type = type; 2051da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2061da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2071da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2081da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2091da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2101da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2111da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2126c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2131da177e4SLinus Torvalds dp->dl_time = 0; 2141da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 215ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 216ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2171da177e4SLinus Torvalds return dp; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds void 2211da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2241da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 22513cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2265b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 227ef0f3390SNeilBrown num_delegations--; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2321da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2331da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2341da177e4SLinus Torvalds * fl_release_callback. 2351da177e4SLinus Torvalds */ 2361da177e4SLinus Torvalds static void 2371da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2421da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2431da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2441da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 245c907132dSNeilBrown if (dp->dl_flock) 246a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2471da177e4SLinus Torvalds nfsd_close(filp); 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds /* Called under the state lock. */ 2511da177e4SLinus Torvalds static void 2521da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2531da177e4SLinus Torvalds { 254ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 255ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2561da177e4SLinus Torvalds spin_lock(&recall_lock); 2571da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2581da177e4SLinus Torvalds spin_unlock(&recall_lock); 2591da177e4SLinus Torvalds nfs4_close_delegation(dp); 2601da177e4SLinus Torvalds nfs4_put_delegation(dp); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* 2641da177e4SLinus Torvalds * SETCLIENTID state 2651da177e4SLinus Torvalds */ 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2681da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2691da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2701da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds #define clientid_hashval(id) \ 2731da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 274a55370a3SNeilBrown #define clientstr_hashval(name) \ 275a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2781da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2791da177e4SLinus Torvalds * 2801da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2811da177e4SLinus Torvalds * setclientid_confirmed info. 2821da177e4SLinus Torvalds * 2831da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2841da177e4SLinus Torvalds * setclientid info. 2851da177e4SLinus Torvalds * 2861da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2871da177e4SLinus Torvalds * for lease renewal. 2881da177e4SLinus Torvalds * 2891da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2901da177e4SLinus Torvalds * for last close replay. 2911da177e4SLinus Torvalds */ 2921da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2931da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2941da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2951da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2961da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2971da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2981da177e4SLinus Torvalds static struct list_head client_lru; 2991da177e4SLinus Torvalds static struct list_head close_lru; 3001da177e4SLinus Torvalds 3012283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 3022283963fSJ. Bruce Fields { 3032283963fSJ. Bruce Fields list_del(&stp->st_hash); 3042283963fSJ. Bruce Fields list_del(&stp->st_perfile); 3052283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 3062283963fSJ. Bruce Fields } 3072283963fSJ. Bruce Fields 3082283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 3092283963fSJ. Bruce Fields { 3102283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3112283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3122283963fSJ. Bruce Fields } 3132283963fSJ. Bruce Fields 3142283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3152283963fSJ. Bruce Fields { 3162283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3172283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3182283963fSJ. Bruce Fields free_generic_stateid(stp); 3192283963fSJ. Bruce Fields } 3202283963fSJ. Bruce Fields 321f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 322f044ff83SJ. Bruce Fields { 323f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 324f044ff83SJ. Bruce Fields 325f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 326f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 327f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 328f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 329f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 330f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 331f044ff83SJ. Bruce Fields release_lock_stateid(stp); 332f044ff83SJ. Bruce Fields } 333f044ff83SJ. Bruce Fields } 334f044ff83SJ. Bruce Fields 335f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 336f044ff83SJ. Bruce Fields { 337f044ff83SJ. Bruce Fields unhash_lockowner(sop); 338f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 339f044ff83SJ. Bruce Fields } 340f044ff83SJ. Bruce Fields 341f1d110caSJ. Bruce Fields static void 342f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 343f1d110caSJ. Bruce Fields { 344f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 345f1d110caSJ. Bruce Fields 346f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 347f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 348f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 349f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 350f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 351f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 352f1d110caSJ. Bruce Fields } 353f1d110caSJ. Bruce Fields } 354f1d110caSJ. Bruce Fields 3552283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3562283963fSJ. Bruce Fields { 3572283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3582283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3592283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3602283963fSJ. Bruce Fields free_generic_stateid(stp); 3612283963fSJ. Bruce Fields } 3622283963fSJ. Bruce Fields 363f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 364f1d110caSJ. Bruce Fields { 365f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 366f1d110caSJ. Bruce Fields 367f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 368f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 369f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 370f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 371f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 372f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 373f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 374f1d110caSJ. Bruce Fields release_open_stateid(stp); 375f1d110caSJ. Bruce Fields } 376f1d110caSJ. Bruce Fields } 377f1d110caSJ. Bruce Fields 378f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 379f1d110caSJ. Bruce Fields { 380f044ff83SJ. Bruce Fields unhash_openowner(sop); 381f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 382f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 383f1d110caSJ. Bruce Fields } 384f1d110caSJ. Bruce Fields 3857116ed6bSAndy Adamson static void 3867116ed6bSAndy Adamson release_session(struct nfsd4_session *ses) 3877116ed6bSAndy Adamson { 3887116ed6bSAndy Adamson list_del(&ses->se_hash); 3897116ed6bSAndy Adamson list_del(&ses->se_perclnt); 3907116ed6bSAndy Adamson nfsd4_put_session(ses); 3917116ed6bSAndy Adamson } 3927116ed6bSAndy Adamson 3937116ed6bSAndy Adamson void 3947116ed6bSAndy Adamson free_session(struct kref *kref) 3957116ed6bSAndy Adamson { 3967116ed6bSAndy Adamson struct nfsd4_session *ses; 3977116ed6bSAndy Adamson 3987116ed6bSAndy Adamson ses = container_of(kref, struct nfsd4_session, se_ref); 3997116ed6bSAndy Adamson kfree(ses->se_slots); 4007116ed6bSAndy Adamson kfree(ses); 4017116ed6bSAndy Adamson } 4027116ed6bSAndy Adamson 4031da177e4SLinus Torvalds static inline void 4041da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 4051da177e4SLinus Torvalds { 4061da177e4SLinus Torvalds /* 4071da177e4SLinus Torvalds * Move client to the end to the LRU list. 4081da177e4SLinus Torvalds */ 4091da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 4101da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 4111da177e4SLinus Torvalds clp->cl_clientid.cl_id); 4121da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 4131da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds 4161da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 4171da177e4SLinus Torvalds static int 4181da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 4191da177e4SLinus Torvalds { 4201da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 4211da177e4SLinus Torvalds return 0; 4221da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 4231da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 4241da177e4SLinus Torvalds return 1; 4251da177e4SLinus Torvalds } 4261da177e4SLinus Torvalds 4271da177e4SLinus Torvalds /* 4281da177e4SLinus Torvalds * XXX Should we use a slab cache ? 4291da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 4301da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 4311da177e4SLinus Torvalds */ 43235bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 4331da177e4SLinus Torvalds { 4341da177e4SLinus Torvalds struct nfs4_client *clp; 4351da177e4SLinus Torvalds 43635bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 43735bba9a3SJ. Bruce Fields if (clp == NULL) 43835bba9a3SJ. Bruce Fields return NULL; 43935bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 44035bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 44135bba9a3SJ. Bruce Fields kfree(clp); 44235bba9a3SJ. Bruce Fields return NULL; 44335bba9a3SJ. Bruce Fields } 4441da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 4451da177e4SLinus Torvalds clp->cl_name.len = name.len; 4461da177e4SLinus Torvalds return clp; 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 4491b1a9b31SJ. Bruce Fields static void 4501b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 4511b1a9b31SJ. Bruce Fields { 4521b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 4531b1a9b31SJ. Bruce Fields 4541b1a9b31SJ. Bruce Fields if (clnt) { 455404ec117SJ. Bruce Fields /* 456404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 457404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 458404ec117SJ. Bruce Fields */ 4591b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 4601b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 4611b1a9b31SJ. Bruce Fields } 4621b1a9b31SJ. Bruce Fields } 4631b1a9b31SJ. Bruce Fields 4641da177e4SLinus Torvalds static inline void 4651da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 4661da177e4SLinus Torvalds { 4671b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 4681da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 4691da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 47068e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 4711da177e4SLinus Torvalds kfree(clp->cl_name.data); 4721da177e4SLinus Torvalds kfree(clp); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds void 4761da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 4771da177e4SLinus Torvalds { 4781da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 4791da177e4SLinus Torvalds free_client(clp); 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds static void 4831da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 4841da177e4SLinus Torvalds { 4851da177e4SLinus Torvalds struct nfs4_stateowner *sop; 4861da177e4SLinus Torvalds struct nfs4_delegation *dp; 4871da177e4SLinus Torvalds struct list_head reaplist; 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 4901da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4931da177e4SLinus Torvalds spin_lock(&recall_lock); 494ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 495ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4961da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4971da177e4SLinus Torvalds dp->dl_flock); 498ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4991da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds spin_unlock(&recall_lock); 5021da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 5031da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 5041da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 5051da177e4SLinus Torvalds unhash_delegation(dp); 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds list_del(&clp->cl_idhash); 5081da177e4SLinus Torvalds list_del(&clp->cl_strhash); 5091da177e4SLinus Torvalds list_del(&clp->cl_lru); 510ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 511ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 512f044ff83SJ. Bruce Fields release_openowner(sop); 5131da177e4SLinus Torvalds } 514c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 515c4bf7868SMarc Eshel struct nfsd4_session *ses; 516c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 517c4bf7868SMarc Eshel se_perclnt); 518c4bf7868SMarc Eshel release_session(ses); 519c4bf7868SMarc Eshel } 5201da177e4SLinus Torvalds put_nfs4_client(clp); 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 52335bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 52435bba9a3SJ. Bruce Fields { 5251da177e4SLinus Torvalds struct nfs4_client *clp; 5261da177e4SLinus Torvalds 52735bba9a3SJ. Bruce Fields clp = alloc_client(name); 52835bba9a3SJ. Bruce Fields if (clp == NULL) 52935bba9a3SJ. Bruce Fields return NULL; 530a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 5311da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 5321da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 5331da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 5341da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 535ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 536ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 5379fb87070SMarc Eshel INIT_LIST_HEAD(&clp->cl_sessions); 5381da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 5391da177e4SLinus Torvalds return clp; 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 54235bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 54335bba9a3SJ. Bruce Fields { 54435bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 54535bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 54835bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 54935bba9a3SJ. Bruce Fields { 5501da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 5511da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds 55435bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 55535bba9a3SJ. Bruce Fields { 5561da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 5571da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 5581da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 5591da177e4SLinus Torvalds get_group_info(target->cr_group_info); 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds 56235bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 563599e0a22SJ. Bruce Fields { 564a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds static int 568599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 569599e0a22SJ. Bruce Fields { 570599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds static int 574599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 575599e0a22SJ. Bruce Fields { 576599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 5771da177e4SLinus Torvalds } 5781da177e4SLinus Torvalds 5791da177e4SLinus Torvalds /* XXX what about NGROUP */ 5801da177e4SLinus Torvalds static int 581599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 582599e0a22SJ. Bruce Fields { 583599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 5841da177e4SLinus Torvalds } 5851da177e4SLinus Torvalds 5865ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 5875ec7b46cSJ. Bruce Fields { 5885ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 5895ec7b46cSJ. Bruce Fields 5901da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 5911da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds 594deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 595deda2faaSJ. Bruce Fields { 596deda2faaSJ. Bruce Fields static u32 i; 5971da177e4SLinus Torvalds u32 *p; 5981da177e4SLinus Torvalds 5991da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 600deda2faaSJ. Bruce Fields *p++ = get_seconds(); 601deda2faaSJ. Bruce Fields *p++ = i++; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds 60435bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 60535bba9a3SJ. Bruce Fields { 6061da177e4SLinus Torvalds if (name.len == 0) 6071da177e4SLinus Torvalds return 0; 6081da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 6092fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 6101da177e4SLinus Torvalds return 0; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds return 1; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds 615fd39ca9aSNeilBrown static void 6161da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 6171da177e4SLinus Torvalds { 6181da177e4SLinus Torvalds unsigned int idhashval; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 6211da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6221da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 6231da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 6241da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6251da177e4SLinus Torvalds } 6261da177e4SLinus Torvalds 627fd39ca9aSNeilBrown static void 6281da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6311da177e4SLinus Torvalds unsigned int strhashval; 6321da177e4SLinus Torvalds 6331da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 6341da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 635f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 636a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 6371da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 6381da177e4SLinus Torvalds renew_client(clp); 6391da177e4SLinus Torvalds } 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds static struct nfs4_client * 6421da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 6431da177e4SLinus Torvalds { 6441da177e4SLinus Torvalds struct nfs4_client *clp; 6451da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 6461da177e4SLinus Torvalds 6471da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 648599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 6491da177e4SLinus Torvalds return clp; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds return NULL; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds static struct nfs4_client * 6551da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 6561da177e4SLinus Torvalds { 6571da177e4SLinus Torvalds struct nfs4_client *clp; 6581da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 6591da177e4SLinus Torvalds 6601da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 661599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 6621da177e4SLinus Torvalds return clp; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds return NULL; 6651da177e4SLinus Torvalds } 6661da177e4SLinus Torvalds 66728ce6054SNeilBrown static struct nfs4_client * 66828ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 66928ce6054SNeilBrown { 67028ce6054SNeilBrown struct nfs4_client *clp; 67128ce6054SNeilBrown 67228ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 67328ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 67428ce6054SNeilBrown return clp; 67528ce6054SNeilBrown } 67628ce6054SNeilBrown return NULL; 67728ce6054SNeilBrown } 67828ce6054SNeilBrown 67928ce6054SNeilBrown static struct nfs4_client * 68028ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 68128ce6054SNeilBrown { 68228ce6054SNeilBrown struct nfs4_client *clp; 68328ce6054SNeilBrown 68428ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 68528ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 68628ce6054SNeilBrown return clp; 68728ce6054SNeilBrown } 68828ce6054SNeilBrown return NULL; 68928ce6054SNeilBrown } 69028ce6054SNeilBrown 6911da177e4SLinus Torvalds /* a helper function for parse_callback */ 6921da177e4SLinus Torvalds static int 6931da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 6941da177e4SLinus Torvalds { 6951da177e4SLinus Torvalds unsigned int len = *lenp; 6961da177e4SLinus Torvalds char *p = *addrp; 6971da177e4SLinus Torvalds int n = -1; 6981da177e4SLinus Torvalds char c; 6991da177e4SLinus Torvalds 7001da177e4SLinus Torvalds for (;;) { 7011da177e4SLinus Torvalds if (!len) 7021da177e4SLinus Torvalds break; 7031da177e4SLinus Torvalds len--; 7041da177e4SLinus Torvalds c = *p++; 7051da177e4SLinus Torvalds if (c == '.') 7061da177e4SLinus Torvalds break; 7071da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 7081da177e4SLinus Torvalds n = -1; 7091da177e4SLinus Torvalds break; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds if (n < 0) 7121da177e4SLinus Torvalds n = 0; 7131da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 7141da177e4SLinus Torvalds if (n > 255) { 7151da177e4SLinus Torvalds n = -1; 7161da177e4SLinus Torvalds break; 7171da177e4SLinus Torvalds } 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds *lenp = len; 7201da177e4SLinus Torvalds *addrp = p; 7211da177e4SLinus Torvalds return n; 7221da177e4SLinus Torvalds } 7231da177e4SLinus Torvalds 7241da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 725fd39ca9aSNeilBrown static int 7261da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 7271da177e4SLinus Torvalds { 7281da177e4SLinus Torvalds int temp = 0; 7291da177e4SLinus Torvalds u32 cbaddr = 0; 7301da177e4SLinus Torvalds u16 cbport = 0; 7311da177e4SLinus Torvalds u32 addrlen = addr_len; 7321da177e4SLinus Torvalds char *addr = addr_val; 7331da177e4SLinus Torvalds int i, shift; 7341da177e4SLinus Torvalds 7351da177e4SLinus Torvalds /* ipaddress */ 7361da177e4SLinus Torvalds shift = 24; 7371da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 7381da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7391da177e4SLinus Torvalds return 0; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds cbaddr |= (temp << shift); 7421da177e4SLinus Torvalds if (shift > 0) 7431da177e4SLinus Torvalds shift -= 8; 7441da177e4SLinus Torvalds } 7451da177e4SLinus Torvalds *cbaddrp = cbaddr; 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds /* port */ 7481da177e4SLinus Torvalds shift = 8; 7491da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 7501da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7511da177e4SLinus Torvalds return 0; 7521da177e4SLinus Torvalds } 7531da177e4SLinus Torvalds cbport |= (temp << shift); 7541da177e4SLinus Torvalds if (shift > 0) 7551da177e4SLinus Torvalds shift -= 8; 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds *cbportp = cbport; 7581da177e4SLinus Torvalds return 1; 7591da177e4SLinus Torvalds } 7601da177e4SLinus Torvalds 761fd39ca9aSNeilBrown static void 7621da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 7631da177e4SLinus Torvalds { 7641da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 7651da177e4SLinus Torvalds 7661da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 7671da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 7681da177e4SLinus Torvalds goto out_err; 7691da177e4SLinus Torvalds 7701da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 7711da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 7721da177e4SLinus Torvalds goto out_err; 7731da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 7741da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 7751da177e4SLinus Torvalds return; 7761da177e4SLinus Torvalds out_err: 777849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 7781da177e4SLinus Torvalds "will not receive delegations\n", 7791da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds return; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 784b37ad28bSAl Viro __be32 785b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 786b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 7871da177e4SLinus Torvalds { 78827459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 7891da177e4SLinus Torvalds struct xdr_netobj clname = { 7901da177e4SLinus Torvalds .len = setclid->se_namelen, 7911da177e4SLinus Torvalds .data = setclid->se_name, 7921da177e4SLinus Torvalds }; 7931da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7941da177e4SLinus Torvalds unsigned int strhashval; 79528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 796b37ad28bSAl Viro __be32 status; 79768e76ad0SOlga Kornievskaia char *princ; 798a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds if (!check_name(clname)) 80173aea4ecSNeil Brown return nfserr_inval; 8021da177e4SLinus Torvalds 803a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 804a55370a3SNeilBrown if (status) 80573aea4ecSNeil Brown return status; 806a55370a3SNeilBrown 8071da177e4SLinus Torvalds /* 8081da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8091da177e4SLinus Torvalds * We get here on a DRC miss. 8101da177e4SLinus Torvalds */ 8111da177e4SLinus Torvalds 812a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 8131da177e4SLinus Torvalds 8141da177e4SLinus Torvalds nfs4_lock_state(); 81528ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 81628ce6054SNeilBrown if (conf) { 817a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 8181da177e4SLinus Torvalds status = nfserr_clid_inuse; 819026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 820026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client" 821026722c2SJ. Bruce Fields " at %pI4\n", &conf->cl_addr); 8221da177e4SLinus Torvalds goto out; 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds } 825a186e767SJ. Bruce Fields /* 826a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 827a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 828a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 829a186e767SJ. Bruce Fields */ 83028ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 8311da177e4SLinus Torvalds status = nfserr_resource; 8321da177e4SLinus Torvalds if (!conf) { 8331da177e4SLinus Torvalds /* 834a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 835a186e767SJ. Bruce Fields * placed first, because it is the normal case 8361da177e4SLinus Torvalds */ 8371da177e4SLinus Torvalds if (unconf) 8381da177e4SLinus Torvalds expire_client(unconf); 839a55370a3SNeilBrown new = create_client(clname, dname); 840a55370a3SNeilBrown if (new == NULL) 8411da177e4SLinus Torvalds goto out; 8421da177e4SLinus Torvalds gen_clid(new); 843599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 8441da177e4SLinus Torvalds /* 845a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 846a186e767SJ. Bruce Fields * probable callback update 8471da177e4SLinus Torvalds */ 84831f4a6c1SNeilBrown if (unconf) { 84931f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 85031f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 85131f4a6c1SNeilBrown * This has the advantage that there is at most 85231f4a6c1SNeilBrown * one {*x***} in either list at any time. 85331f4a6c1SNeilBrown */ 8541da177e4SLinus Torvalds expire_client(unconf); 8551da177e4SLinus Torvalds } 856a55370a3SNeilBrown new = create_client(clname, dname); 857a55370a3SNeilBrown if (new == NULL) 8581da177e4SLinus Torvalds goto out; 8591da177e4SLinus Torvalds copy_clid(new, conf); 8601da177e4SLinus Torvalds } else if (!unconf) { 8611da177e4SLinus Torvalds /* 862a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 863a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 864a186e767SJ. Bruce Fields * confirmed. 8651da177e4SLinus Torvalds */ 866a55370a3SNeilBrown new = create_client(clname, dname); 867a55370a3SNeilBrown if (new == NULL) 8681da177e4SLinus Torvalds goto out; 8691da177e4SLinus Torvalds gen_clid(new); 87049ba8781SJ. Bruce Fields } else { 8711da177e4SLinus Torvalds /* 872a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 873a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 874a186e767SJ. Bruce Fields * confirmed. 8751da177e4SLinus Torvalds */ 8761da177e4SLinus Torvalds expire_client(unconf); 877a55370a3SNeilBrown new = create_client(clname, dname); 878a55370a3SNeilBrown if (new == NULL) 8791da177e4SLinus Torvalds goto out; 8801da177e4SLinus Torvalds gen_clid(new); 8811da177e4SLinus Torvalds } 882c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 883c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 88461054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 88568e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 88668e76ad0SOlga Kornievskaia if (princ) { 88768e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 88868e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 88968e76ad0SOlga Kornievskaia free_client(new); 89068e76ad0SOlga Kornievskaia goto out; 89168e76ad0SOlga Kornievskaia } 89268e76ad0SOlga Kornievskaia } 893c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 894c175b83cSJ. Bruce Fields gen_confirm(new); 895c175b83cSJ. Bruce Fields gen_callback(new, setclid); 896c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 8971da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8981da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8991da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 9001da177e4SLinus Torvalds status = nfs_ok; 9011da177e4SLinus Torvalds out: 9021da177e4SLinus Torvalds nfs4_unlock_state(); 9031da177e4SLinus Torvalds return status; 9041da177e4SLinus Torvalds } 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds 9071da177e4SLinus Torvalds /* 908a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 909a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 910a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 9111da177e4SLinus Torvalds */ 912b37ad28bSAl Viro __be32 913b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 914b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 915b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 9161da177e4SLinus Torvalds { 91727459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 91821ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 9191da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 9201da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 921b37ad28bSAl Viro __be32 status; 9221da177e4SLinus Torvalds 9231da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 9241da177e4SLinus Torvalds return nfserr_stale_clientid; 9251da177e4SLinus Torvalds /* 9261da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 9271da177e4SLinus Torvalds * We get here on a DRC miss. 9281da177e4SLinus Torvalds */ 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds nfs4_lock_state(); 93121ab45a4SNeilBrown 93221ab45a4SNeilBrown conf = find_confirmed_client(clid); 93321ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 93421ab45a4SNeilBrown 93522de4d83SNeilBrown status = nfserr_clid_inuse; 93627459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 9371da177e4SLinus Torvalds goto out; 93827459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 9391da177e4SLinus Torvalds goto out; 94021ab45a4SNeilBrown 941a186e767SJ. Bruce Fields /* 942a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 943a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 944a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 945a186e767SJ. Bruce Fields */ 946366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 947a186e767SJ. Bruce Fields /* 948a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 949a186e767SJ. Bruce Fields * callback update 9507c79f737SNeilBrown */ 951599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 9521da177e4SLinus Torvalds status = nfserr_clid_inuse; 9531da177e4SLinus Torvalds else { 9541a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9551a69c179SNeilBrown * change request correctly. */ 956cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 95721ab45a4SNeilBrown gen_confirm(conf); 95846309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9591a69c179SNeilBrown expire_client(unconf); 9601da177e4SLinus Torvalds status = nfs_ok; 9611a69c179SNeilBrown 9621da177e4SLinus Torvalds } 963f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 964a186e767SJ. Bruce Fields /* 965a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 966a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 967a186e767SJ. Bruce Fields * do nothing. 9687c79f737SNeilBrown */ 969599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 9701da177e4SLinus Torvalds status = nfserr_clid_inuse; 97121ab45a4SNeilBrown else 9721da177e4SLinus Torvalds status = nfs_ok; 9737c79f737SNeilBrown } else if (!conf && unconf 974599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 975a186e767SJ. Bruce Fields /* 976a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 977a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 9781da177e4SLinus Torvalds */ 979599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9801da177e4SLinus Torvalds status = nfserr_clid_inuse; 9811da177e4SLinus Torvalds } else { 9821a69c179SNeilBrown unsigned int hash = 9831a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9841a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9851a69c179SNeilBrown hash); 9861a69c179SNeilBrown if (conf) { 987c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9881a69c179SNeilBrown expire_client(conf); 9891a69c179SNeilBrown } 9901da177e4SLinus Torvalds move_to_confirmed(unconf); 99121ab45a4SNeilBrown conf = unconf; 99246f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 9931a69c179SNeilBrown status = nfs_ok; 9941da177e4SLinus Torvalds } 995599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 996599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 9977c79f737SNeilBrown &confirm)))) { 998a186e767SJ. Bruce Fields /* 999a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1000a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 10011da177e4SLinus Torvalds */ 10021da177e4SLinus Torvalds status = nfserr_stale_clientid; 10037c79f737SNeilBrown } else { 10041da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 100522de4d83SNeilBrown status = nfserr_clid_inuse; 100608e8987cSNeilBrown } 10071da177e4SLinus Torvalds out: 10081da177e4SLinus Torvalds nfs4_unlock_state(); 10091da177e4SLinus Torvalds return status; 10101da177e4SLinus Torvalds } 10111da177e4SLinus Torvalds 10121da177e4SLinus Torvalds /* OPEN Share state helper functions */ 10131da177e4SLinus Torvalds static inline struct nfs4_file * 10141da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 10151da177e4SLinus Torvalds { 10161da177e4SLinus Torvalds struct nfs4_file *fp; 10171da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 10181da177e4SLinus Torvalds 1019e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1020e60d4398SNeilBrown if (fp) { 10218b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 10221da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 10238beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 10248beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 10258b671b80SJ. Bruce Fields spin_lock(&recall_lock); 10261da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 10278b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 10281da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 10291da177e4SLinus Torvalds fp->fi_id = current_fileid++; 103047f9940cSMeelap Shah fp->fi_had_conflict = false; 10311da177e4SLinus Torvalds return fp; 10321da177e4SLinus Torvalds } 10331da177e4SLinus Torvalds return NULL; 10341da177e4SLinus Torvalds } 10351da177e4SLinus Torvalds 10361da177e4SLinus Torvalds static void 1037e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1038e60d4398SNeilBrown { 1039e60d4398SNeilBrown if (*slab == NULL) 1040e60d4398SNeilBrown return; 10411a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1042e60d4398SNeilBrown *slab = NULL; 1043e60d4398SNeilBrown } 1044e60d4398SNeilBrown 1045e8ff2a84SJ. Bruce Fields void 1046e60d4398SNeilBrown nfsd4_free_slabs(void) 1047e60d4398SNeilBrown { 1048e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1049e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10505ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10515b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1052e60d4398SNeilBrown } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds static int 10551da177e4SLinus Torvalds nfsd4_init_slabs(void) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 105820c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1059e60d4398SNeilBrown if (stateowner_slab == NULL) 1060e60d4398SNeilBrown goto out_nomem; 1061e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 106220c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1063e60d4398SNeilBrown if (file_slab == NULL) 1064e60d4398SNeilBrown goto out_nomem; 10655ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 106620c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 10675ac049acSNeilBrown if (stateid_slab == NULL) 10685ac049acSNeilBrown goto out_nomem; 10695b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 107020c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 10715b2d21c1SNeilBrown if (deleg_slab == NULL) 10725b2d21c1SNeilBrown goto out_nomem; 1073e60d4398SNeilBrown return 0; 1074e60d4398SNeilBrown out_nomem: 1075e60d4398SNeilBrown nfsd4_free_slabs(); 10761da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10771da177e4SLinus Torvalds return -ENOMEM; 10781da177e4SLinus Torvalds } 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds void 10811da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10821da177e4SLinus Torvalds { 10831da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10841da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10851da177e4SLinus Torvalds kfree(sop->so_owner.data); 10861da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10871da177e4SLinus Torvalds } 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10901da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10911da177e4SLinus Torvalds { 10921da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10931da177e4SLinus Torvalds 10941da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10951da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10961da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10971da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10981da177e4SLinus Torvalds kref_init(&sop->so_ref); 10991da177e4SLinus Torvalds return sop; 11001da177e4SLinus Torvalds } 11011da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 11021da177e4SLinus Torvalds } 11031da177e4SLinus Torvalds return NULL; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static struct nfs4_stateowner * 11071da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 11081da177e4SLinus Torvalds struct nfs4_stateowner *sop; 11091da177e4SLinus Torvalds struct nfs4_replay *rp; 11101da177e4SLinus Torvalds unsigned int idhashval; 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 11131da177e4SLinus Torvalds return NULL; 11141da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 11151da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 11161da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 11171da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1118ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1119ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 11201da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 11211da177e4SLinus Torvalds sop->so_time = 0; 11221da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 11231da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1124ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 11251da177e4SLinus Torvalds sop->so_is_open_owner = 1; 11261da177e4SLinus Torvalds sop->so_id = current_ownerid++; 11271da177e4SLinus Torvalds sop->so_client = clp; 11281da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 11291da177e4SLinus Torvalds sop->so_confirmed = 0; 11301da177e4SLinus Torvalds rp = &sop->so_replay; 1131de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11321da177e4SLinus Torvalds rp->rp_buflen = 0; 11331da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11341da177e4SLinus Torvalds return sop; 11351da177e4SLinus Torvalds } 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds static inline void 11381da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11391da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11401da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11411da177e4SLinus Torvalds 11421da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1143ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1144ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11451da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11461da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1147ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11488beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11491da177e4SLinus Torvalds stp->st_stateowner = sop; 115013cd2184SNeilBrown get_nfs4_file(fp); 11511da177e4SLinus Torvalds stp->st_file = fp; 11521da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11531da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11541da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11551da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11561da177e4SLinus Torvalds stp->st_access_bmap = 0; 11571da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11581da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11591da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11604c4cd222SNeilBrown stp->st_openstp = NULL; 11611da177e4SLinus Torvalds } 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds static void 11641da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11651da177e4SLinus Torvalds { 11661da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11671da177e4SLinus Torvalds 1168358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11691da177e4SLinus Torvalds sop->so_time = get_seconds(); 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11721da177e4SLinus Torvalds static int 1173599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1174599e0a22SJ. Bruce Fields clientid_t *clid) 1175599e0a22SJ. Bruce Fields { 1176599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1177599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1178599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11791da177e4SLinus Torvalds } 11801da177e4SLinus Torvalds 11811da177e4SLinus Torvalds static struct nfs4_stateowner * 11821da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 11831da177e4SLinus Torvalds { 11841da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 11851da177e4SLinus Torvalds 11861da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1187599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 11881da177e4SLinus Torvalds return so; 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds return NULL; 11911da177e4SLinus Torvalds } 11921da177e4SLinus Torvalds 11931da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 11941da177e4SLinus Torvalds static struct nfs4_file * 11951da177e4SLinus Torvalds find_file(struct inode *ino) 11961da177e4SLinus Torvalds { 11971da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 11981da177e4SLinus Torvalds struct nfs4_file *fp; 11991da177e4SLinus Torvalds 12008b671b80SJ. Bruce Fields spin_lock(&recall_lock); 12011da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 120213cd2184SNeilBrown if (fp->fi_inode == ino) { 120313cd2184SNeilBrown get_nfs4_file(fp); 12048b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 12051da177e4SLinus Torvalds return fp; 12061da177e4SLinus Torvalds } 120713cd2184SNeilBrown } 12088b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 12091da177e4SLinus Torvalds return NULL; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12128838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1213ba5a6a19SJ. Bruce Fields { 12148838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 12158838dc43SJ. Bruce Fields return 0; 12168838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 12178838dc43SJ. Bruce Fields return 0; 12188838dc43SJ. Bruce Fields return 1; 1219ba5a6a19SJ. Bruce Fields } 1220ba5a6a19SJ. Bruce Fields 12218838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1222ba5a6a19SJ. Bruce Fields { 12238838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 12248838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1225ba5a6a19SJ. Bruce Fields } 12261da177e4SLinus Torvalds 12274f83aa30SJ. Bruce Fields /* 12284f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 12294f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 12304f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 12314f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 12324f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 12334f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 12344f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 12354f83aa30SJ. Bruce Fields * 12364f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 12374f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 12384f83aa30SJ. Bruce Fields * 12394f83aa30SJ. Bruce Fields * OPEN allow read, deny write 12404f83aa30SJ. Bruce Fields * OPEN allow both, deny none 12414f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 12424f83aa30SJ. Bruce Fields * 12434f83aa30SJ. Bruce Fields * which we should reject. 12444f83aa30SJ. Bruce Fields */ 1245fd39ca9aSNeilBrown static void 12461da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12471da177e4SLinus Torvalds int i; 12481da177e4SLinus Torvalds 12491da177e4SLinus Torvalds *access = 0; 12501da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12511da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12521da177e4SLinus Torvalds *access |= i; 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds 1256fd39ca9aSNeilBrown static void 12571da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12581da177e4SLinus Torvalds int i; 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds *deny = 0; 12611da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12621da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12631da177e4SLinus Torvalds *deny |= i ; 12641da177e4SLinus Torvalds } 12651da177e4SLinus Torvalds } 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds static int 12681da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12691da177e4SLinus Torvalds unsigned int access, deny; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12721da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12731da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12741da177e4SLinus Torvalds return 0; 12751da177e4SLinus Torvalds return 1; 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds /* 12791da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12801da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12811da177e4SLinus Torvalds */ 1282b37ad28bSAl Viro static __be32 12831da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12841da177e4SLinus Torvalds { 12851da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12861da177e4SLinus Torvalds struct nfs4_file *fp; 12871da177e4SLinus Torvalds struct nfs4_stateid *stp; 1288b37ad28bSAl Viro __be32 ret; 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds fp = find_file(ino); 129313cd2184SNeilBrown if (!fp) 129413cd2184SNeilBrown return nfs_ok; 1295b700949bSNeilBrown ret = nfserr_locked; 12961da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12978beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12981da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12991da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 130013cd2184SNeilBrown goto out; 13011da177e4SLinus Torvalds } 130213cd2184SNeilBrown ret = nfs_ok; 130313cd2184SNeilBrown out: 130413cd2184SNeilBrown put_nfs4_file(fp); 130513cd2184SNeilBrown return ret; 13061da177e4SLinus Torvalds } 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds static inline void 13091da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13101da177e4SLinus Torvalds { 13111da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1312aceaf78dSDave Hansen drop_file_write_access(filp); 13131da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13141da177e4SLinus Torvalds } 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds /* 13181da177e4SLinus Torvalds * Recall a delegation 13191da177e4SLinus Torvalds */ 13201da177e4SLinus Torvalds static int 13211da177e4SLinus Torvalds do_recall(void *__dp) 13221da177e4SLinus Torvalds { 13231da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13241da177e4SLinus Torvalds 132547f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 13261da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13271da177e4SLinus Torvalds return 0; 13281da177e4SLinus Torvalds } 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds /* 13311da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13321da177e4SLinus Torvalds * by the lease (file_lock) 13331da177e4SLinus Torvalds * 13341da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13351da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13361da177e4SLinus Torvalds * lease. 13371da177e4SLinus Torvalds */ 13381da177e4SLinus Torvalds static 13391da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13401da177e4SLinus Torvalds { 13411da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13421da177e4SLinus Torvalds struct task_struct *t; 13431da177e4SLinus Torvalds 13441da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13451da177e4SLinus Torvalds if (!dp) 13461da177e4SLinus Torvalds return; 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13491da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13501da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13511da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13521da177e4SLinus Torvalds * it's safe to take a reference: */ 13531da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1354cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13551da177e4SLinus Torvalds 13561da177e4SLinus Torvalds spin_lock(&recall_lock); 13571da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13581da177e4SLinus Torvalds spin_unlock(&recall_lock); 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13611da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13621da177e4SLinus Torvalds 13630272e1fdSJ. Bruce Fields /* 13640272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13650272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13660272e1fdSJ. Bruce Fields * in time. 13670272e1fdSJ. Bruce Fields */ 13680272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13691da177e4SLinus Torvalds 13701da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13711da177e4SLinus Torvalds if (IS_ERR(t)) { 13721da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13751da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13761da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1377cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13781da177e4SLinus Torvalds nfs4_put_delegation(dp); 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds } 13811da177e4SLinus Torvalds 13821da177e4SLinus Torvalds /* 13831da177e4SLinus Torvalds * The file_lock is being reapd. 13841da177e4SLinus Torvalds * 13851da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13861da177e4SLinus Torvalds */ 13871da177e4SLinus Torvalds static 13881da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13891da177e4SLinus Torvalds { 13901da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13951da177e4SLinus Torvalds return; 13961da177e4SLinus Torvalds dp->dl_flock = NULL; 13971da177e4SLinus Torvalds } 13981da177e4SLinus Torvalds 13991da177e4SLinus Torvalds /* 14001da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 14011da177e4SLinus Torvalds * 1402a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 14031da177e4SLinus Torvalds */ 14041da177e4SLinus Torvalds static 14051da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 14061da177e4SLinus Torvalds { 14071da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14101da177e4SLinus Torvalds if (!dp) 14111da177e4SLinus Torvalds return; 14121da177e4SLinus Torvalds dp->dl_flock = new; 14131da177e4SLinus Torvalds } 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds /* 1416a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 14171da177e4SLinus Torvalds */ 14181da177e4SLinus Torvalds static 14191da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14201da177e4SLinus Torvalds { 14211da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14221da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14231da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14241da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14271da177e4SLinus Torvalds return 0; 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14301da177e4SLinus Torvalds } 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds static 14341da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14351da177e4SLinus Torvalds { 14361da177e4SLinus Torvalds if (arg & F_UNLCK) 14371da177e4SLinus Torvalds return lease_modify(onlist, arg); 14381da177e4SLinus Torvalds else 14391da177e4SLinus Torvalds return -EAGAIN; 14401da177e4SLinus Torvalds } 14411da177e4SLinus Torvalds 1442fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14431da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14441da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14451da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14461da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14471da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14481da177e4SLinus Torvalds }; 14491da177e4SLinus Torvalds 14501da177e4SLinus Torvalds 1451b37ad28bSAl Viro __be32 14521da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14531da177e4SLinus Torvalds { 14541da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14551da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14561da177e4SLinus Torvalds unsigned int strhashval; 14571da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14581da177e4SLinus Torvalds 14591da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14600f442aa2SJ. Bruce Fields return nfserr_inval; 14611da177e4SLinus Torvalds 14621da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14631da177e4SLinus Torvalds return nfserr_stale_clientid; 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14661da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14671da177e4SLinus Torvalds open->op_stateowner = sop; 14680f442aa2SJ. Bruce Fields if (!sop) { 14690f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14700f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14710f442aa2SJ. Bruce Fields if (clp == NULL) 14720f442aa2SJ. Bruce Fields return nfserr_expired; 14730f442aa2SJ. Bruce Fields goto renew; 14740f442aa2SJ. Bruce Fields } 1475ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14760f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1477ae8b6253SJ. Bruce Fields clp = sop->so_client; 1478f044ff83SJ. Bruce Fields release_openowner(sop); 14790f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1480ae8b6253SJ. Bruce Fields goto renew; 14810f442aa2SJ. Bruce Fields } 14820f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14831da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1484a90b061cSAl Viro return nfserr_replay_me; 14851da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14861da177e4SLinus Torvalds * that we don't even have replay data saved! 14871da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14881da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14891da177e4SLinus Torvalds * fail again for the same reason. 14901da177e4SLinus Torvalds */ 14910f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14921da177e4SLinus Torvalds goto renew; 14931da177e4SLinus Torvalds } 14940f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14950f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14960f442aa2SJ. Bruce Fields renew: 14970f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14981da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14991da177e4SLinus Torvalds if (sop == NULL) 15000f442aa2SJ. Bruce Fields return nfserr_resource; 15011da177e4SLinus Torvalds open->op_stateowner = sop; 15020f442aa2SJ. Bruce Fields } 15030f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 15041da177e4SLinus Torvalds renew_client(sop->so_client); 15050f442aa2SJ. Bruce Fields return nfs_ok; 15061da177e4SLinus Torvalds } 15071da177e4SLinus Torvalds 1508b37ad28bSAl Viro static inline __be32 15094a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15104a6e43e6SNeilBrown { 15114a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15124a6e43e6SNeilBrown return nfserr_openmode; 15134a6e43e6SNeilBrown else 15144a6e43e6SNeilBrown return nfs_ok; 15154a6e43e6SNeilBrown } 15164a6e43e6SNeilBrown 151752f4fb43SNeilBrown static struct nfs4_delegation * 151852f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 151952f4fb43SNeilBrown { 152052f4fb43SNeilBrown struct nfs4_delegation *dp; 152152f4fb43SNeilBrown 1522ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 152352f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 152452f4fb43SNeilBrown return dp; 152552f4fb43SNeilBrown } 152652f4fb43SNeilBrown return NULL; 152752f4fb43SNeilBrown } 152852f4fb43SNeilBrown 1529b37ad28bSAl Viro static __be32 1530567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1531567d9829SNeilBrown struct nfs4_delegation **dp) 1532567d9829SNeilBrown { 1533567d9829SNeilBrown int flags; 1534b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1535567d9829SNeilBrown 1536567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1537567d9829SNeilBrown if (*dp == NULL) 1538c44c5eebSNeilBrown goto out; 1539567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1540567d9829SNeilBrown RD_STATE : WR_STATE; 1541567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1542567d9829SNeilBrown if (status) 1543567d9829SNeilBrown *dp = NULL; 1544c44c5eebSNeilBrown out: 1545c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1546c44c5eebSNeilBrown return nfs_ok; 1547c44c5eebSNeilBrown if (status) 1548c44c5eebSNeilBrown return status; 1549c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1550c44c5eebSNeilBrown return nfs_ok; 1551567d9829SNeilBrown } 1552567d9829SNeilBrown 1553b37ad28bSAl Viro static __be32 15541da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15551da177e4SLinus Torvalds { 15561da177e4SLinus Torvalds struct nfs4_stateid *local; 1557b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15581da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15591da177e4SLinus Torvalds 15608beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15611da177e4SLinus Torvalds /* ignore lock owners */ 15621da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15631da177e4SLinus Torvalds continue; 15641da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15651da177e4SLinus Torvalds if (local->st_stateowner == sop) 15661da177e4SLinus Torvalds *stpp = local; 15671da177e4SLinus Torvalds /* check for conflicting share reservations */ 15681da177e4SLinus Torvalds if (!test_share(local, open)) 15691da177e4SLinus Torvalds goto out; 15701da177e4SLinus Torvalds } 15711da177e4SLinus Torvalds status = 0; 15721da177e4SLinus Torvalds out: 15731da177e4SLinus Torvalds return status; 15741da177e4SLinus Torvalds } 15751da177e4SLinus Torvalds 15765ac049acSNeilBrown static inline struct nfs4_stateid * 15775ac049acSNeilBrown nfs4_alloc_stateid(void) 15785ac049acSNeilBrown { 15795ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15805ac049acSNeilBrown } 15815ac049acSNeilBrown 1582b37ad28bSAl Viro static __be32 15831da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1584567d9829SNeilBrown struct nfs4_delegation *dp, 15851da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15861da177e4SLinus Torvalds { 15871da177e4SLinus Torvalds struct nfs4_stateid *stp; 15881da177e4SLinus Torvalds 15895ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15901da177e4SLinus Torvalds if (stp == NULL) 15911da177e4SLinus Torvalds return nfserr_resource; 15921da177e4SLinus Torvalds 1593567d9829SNeilBrown if (dp) { 1594567d9829SNeilBrown get_file(dp->dl_vfs_file); 1595567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1596567d9829SNeilBrown } else { 1597b37ad28bSAl Viro __be32 status; 1598567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1599567d9829SNeilBrown &stp->st_vfs_file); 16001da177e4SLinus Torvalds if (status) { 16011da177e4SLinus Torvalds if (status == nfserr_dropit) 16021da177e4SLinus Torvalds status = nfserr_jukebox; 16035ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 16041da177e4SLinus Torvalds return status; 16051da177e4SLinus Torvalds } 1606567d9829SNeilBrown } 16071da177e4SLinus Torvalds *stpp = stp; 16081da177e4SLinus Torvalds return 0; 16091da177e4SLinus Torvalds } 16101da177e4SLinus Torvalds 1611b37ad28bSAl Viro static inline __be32 16121da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16131da177e4SLinus Torvalds struct nfsd4_open *open) 16141da177e4SLinus Torvalds { 16151da177e4SLinus Torvalds struct iattr iattr = { 16161da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16171da177e4SLinus Torvalds .ia_size = 0, 16181da177e4SLinus Torvalds }; 16191da177e4SLinus Torvalds if (!open->op_truncate) 16201da177e4SLinus Torvalds return 0; 16211da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16229246585aSAl Viro return nfserr_inval; 16231da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16241da177e4SLinus Torvalds } 16251da177e4SLinus Torvalds 1626b37ad28bSAl Viro static __be32 16271da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16281da177e4SLinus Torvalds { 16291da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16307eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 16316c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1632b37ad28bSAl Viro __be32 status; 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16356c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16366c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16371da177e4SLinus Torvalds 16386c26d08fSJ. Bruce Fields if (new_writer) { 1639b37ad28bSAl Viro int err = get_write_access(inode); 1640b37ad28bSAl Viro if (err) 1641b37ad28bSAl Viro return nfserrno(err); 1642e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 1643e518f056SBenny Halevy if (err) 1644e518f056SBenny Halevy return nfserrno(err); 1645e518f056SBenny Halevy file_take_write(filp); 16466c26d08fSJ. Bruce Fields } 16471da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16481da177e4SLinus Torvalds if (status) { 16496c26d08fSJ. Bruce Fields if (new_writer) 16501da177e4SLinus Torvalds put_write_access(inode); 16511da177e4SLinus Torvalds return status; 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds /* remember the open */ 16546c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 1655b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 1656b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16571da177e4SLinus Torvalds 16581da177e4SLinus Torvalds return nfs_ok; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds 16621da177e4SLinus Torvalds static void 166337515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16641da177e4SLinus Torvalds { 16651da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1666c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16671da177e4SLinus Torvalds } 16681da177e4SLinus Torvalds 16691da177e4SLinus Torvalds /* 16701da177e4SLinus Torvalds * Attempt to hand out a delegation. 16711da177e4SLinus Torvalds */ 16721da177e4SLinus Torvalds static void 16731da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16741da177e4SLinus Torvalds { 16751da177e4SLinus Torvalds struct nfs4_delegation *dp; 16761da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16771da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16781da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16791da177e4SLinus Torvalds int status, flag = 0; 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16827b190fecSNeilBrown open->op_recall = 0; 16837b190fecSNeilBrown switch (open->op_claim_type) { 16847b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16857b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16867b190fecSNeilBrown open->op_recall = 1; 16877b190fecSNeilBrown flag = open->op_delegate_type; 16887b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16891da177e4SLinus Torvalds goto out; 16907b190fecSNeilBrown break; 16917b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16927b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16937b190fecSNeilBrown * had the chance to reclaim theirs.... */ 1694af558e33SJ. Bruce Fields if (locks_in_grace()) 16957b190fecSNeilBrown goto out; 16967b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16977b190fecSNeilBrown goto out; 16981da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16991da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 17001da177e4SLinus Torvalds else 17011da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 17027b190fecSNeilBrown break; 17037b190fecSNeilBrown default: 17047b190fecSNeilBrown goto out; 17057b190fecSNeilBrown } 17061da177e4SLinus Torvalds 17071da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 17081da177e4SLinus Torvalds if (dp == NULL) { 17091da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17101da177e4SLinus Torvalds goto out; 17111da177e4SLinus Torvalds } 17121da177e4SLinus Torvalds locks_init_lock(&fl); 17131da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17141da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17159167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 17161da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17171da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17181da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17191da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17201da177e4SLinus Torvalds 1721a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 17221da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17231da177e4SLinus Torvalds */ 17249167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 17251da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1726c907132dSNeilBrown unhash_delegation(dp); 17271da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17281da177e4SLinus Torvalds goto out; 17291da177e4SLinus Torvalds } 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17321da177e4SLinus Torvalds 17331da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17341da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17351da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17361da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17371da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17381da177e4SLinus Torvalds out: 17397b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17407b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17417b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17422fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 17431da177e4SLinus Torvalds open->op_delegate_type = flag; 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds 17461da177e4SLinus Torvalds /* 17471da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17481da177e4SLinus Torvalds */ 1749b37ad28bSAl Viro __be32 17501da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17511da177e4SLinus Torvalds { 17521da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17531da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17541da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1755567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1756b37ad28bSAl Viro __be32 status; 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds status = nfserr_inval; 1759ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1760ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17611da177e4SLinus Torvalds goto out; 17621da177e4SLinus Torvalds /* 17631da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17641da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17651da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17661da177e4SLinus Torvalds */ 17671da177e4SLinus Torvalds fp = find_file(ino); 17681da177e4SLinus Torvalds if (fp) { 17691da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17701da177e4SLinus Torvalds goto out; 1771c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1772c44c5eebSNeilBrown if (status) 1773c44c5eebSNeilBrown goto out; 17741da177e4SLinus Torvalds } else { 1775c44c5eebSNeilBrown status = nfserr_bad_stateid; 1776c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1777c44c5eebSNeilBrown goto out; 17781da177e4SLinus Torvalds status = nfserr_resource; 17791da177e4SLinus Torvalds fp = alloc_init_file(ino); 17801da177e4SLinus Torvalds if (fp == NULL) 17811da177e4SLinus Torvalds goto out; 17821da177e4SLinus Torvalds } 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds /* 17851da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17861da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17871da177e4SLinus Torvalds */ 17881da177e4SLinus Torvalds if (stp) { 17891da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17901da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17911da177e4SLinus Torvalds if (status) 17921da177e4SLinus Torvalds goto out; 1793444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17941da177e4SLinus Torvalds } else { 17951da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17961da177e4SLinus Torvalds int flags = 0; 17979ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17988837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 17991da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 18008837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 1801567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1802567d9829SNeilBrown if (status) 18031da177e4SLinus Torvalds goto out; 18041da177e4SLinus Torvalds init_stateid(stp, fp, open); 18051da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 18061da177e4SLinus Torvalds if (status) { 18072283963fSJ. Bruce Fields release_open_stateid(stp); 18081da177e4SLinus Torvalds goto out; 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds } 18111da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds /* 18141da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18151da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18161da177e4SLinus Torvalds */ 18171da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds status = nfs_ok; 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18221da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18231da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18241da177e4SLinus Torvalds out: 182513cd2184SNeilBrown if (fp) 182613cd2184SNeilBrown put_nfs4_file(fp); 182737515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 182837515177SNeilBrown nfs4_set_claim_prev(open); 18291da177e4SLinus Torvalds /* 18301da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18311da177e4SLinus Torvalds */ 18321da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18331da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18341da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18351da177e4SLinus Torvalds 18361da177e4SLinus Torvalds return status; 18371da177e4SLinus Torvalds } 18381da177e4SLinus Torvalds 1839b37ad28bSAl Viro __be32 1840b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1841b591480bSJ.Bruce Fields clientid_t *clid) 18421da177e4SLinus Torvalds { 18431da177e4SLinus Torvalds struct nfs4_client *clp; 1844b37ad28bSAl Viro __be32 status; 18451da177e4SLinus Torvalds 18461da177e4SLinus Torvalds nfs4_lock_state(); 18471da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18481da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18491da177e4SLinus Torvalds status = nfserr_stale_clientid; 18501da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18511da177e4SLinus Torvalds goto out; 18521da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18531da177e4SLinus Torvalds status = nfserr_expired; 18541da177e4SLinus Torvalds if (clp == NULL) { 18551da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18561da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18571da177e4SLinus Torvalds goto out; 18581da177e4SLinus Torvalds } 18591da177e4SLinus Torvalds renew_client(clp); 18601da177e4SLinus Torvalds status = nfserr_cb_path_down; 1861ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18621da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18631da177e4SLinus Torvalds goto out; 18641da177e4SLinus Torvalds status = nfs_ok; 18651da177e4SLinus Torvalds out: 18661da177e4SLinus Torvalds nfs4_unlock_state(); 18671da177e4SLinus Torvalds return status; 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds 1870af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 1871af558e33SJ. Bruce Fields }; 1872af558e33SJ. Bruce Fields 1873a76b4319SNeilBrown static void 1874af558e33SJ. Bruce Fields nfsd4_end_grace(void) 1875a76b4319SNeilBrown { 1876a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1877c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1878af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 1879a76b4319SNeilBrown } 1880a76b4319SNeilBrown 1881fd39ca9aSNeilBrown static time_t 18821da177e4SLinus Torvalds nfs4_laundromat(void) 18831da177e4SLinus Torvalds { 18841da177e4SLinus Torvalds struct nfs4_client *clp; 18851da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18861da177e4SLinus Torvalds struct nfs4_delegation *dp; 18871da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18881da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18891da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18901da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18911da177e4SLinus Torvalds 18921da177e4SLinus Torvalds nfs4_lock_state(); 18931da177e4SLinus Torvalds 18941da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1895af558e33SJ. Bruce Fields if (locks_in_grace()) 1896af558e33SJ. Bruce Fields nfsd4_end_grace(); 18971da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18981da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18991da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 19001da177e4SLinus Torvalds t = clp->cl_time - cutoff; 19011da177e4SLinus Torvalds if (clientid_val > t) 19021da177e4SLinus Torvalds clientid_val = t; 19031da177e4SLinus Torvalds break; 19041da177e4SLinus Torvalds } 19051da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 19061da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1907c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 19081da177e4SLinus Torvalds expire_client(clp); 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19111da177e4SLinus Torvalds spin_lock(&recall_lock); 19121da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19131da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19141da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19151da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19161da177e4SLinus Torvalds if (test_val > u) 19171da177e4SLinus Torvalds test_val = u; 19181da177e4SLinus Torvalds break; 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19211da177e4SLinus Torvalds dp, dp->dl_flock); 19221da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds spin_unlock(&recall_lock); 19251da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19261da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19271da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19281da177e4SLinus Torvalds unhash_delegation(dp); 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19311da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19321da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19331da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19341da177e4SLinus Torvalds u = sop->so_time - cutoff; 19351da177e4SLinus Torvalds if (test_val > u) 19361da177e4SLinus Torvalds test_val = u; 19371da177e4SLinus Torvalds break; 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19401da177e4SLinus Torvalds sop->so_id); 1941f044ff83SJ. Bruce Fields release_openowner(sop); 19421da177e4SLinus Torvalds } 19431da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19441da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19451da177e4SLinus Torvalds nfs4_unlock_state(); 19461da177e4SLinus Torvalds return clientid_val; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 1949a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 1950a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 1951a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 1952a254b246SHarvey Harrison 1953a254b246SHarvey Harrison static void 1954c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19551da177e4SLinus Torvalds { 19561da177e4SLinus Torvalds time_t t; 19571da177e4SLinus Torvalds 19581da177e4SLinus Torvalds t = nfs4_laundromat(); 19591da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 196058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds 1963fd39ca9aSNeilBrown static struct nfs4_stateowner * 1964f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1965f8816512SNeilBrown { 19661da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19691da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19701da177e4SLinus Torvalds if (local->so_id == st_id) 19711da177e4SLinus Torvalds return local; 19721da177e4SLinus Torvalds } 19731da177e4SLinus Torvalds } 19741da177e4SLinus Torvalds return NULL; 19751da177e4SLinus Torvalds } 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds static inline int 19781da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19791da177e4SLinus Torvalds { 19807eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 19831da177e4SLinus Torvalds static int 19841da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19851da177e4SLinus Torvalds { 19861da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19871da177e4SLinus Torvalds return 0; 1988849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19891da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19901da177e4SLinus Torvalds stateid->si_generation); 19911da177e4SLinus Torvalds return 1; 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds static inline int 19951da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19961da177e4SLinus Torvalds { 19971da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19981da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19991da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds 20021da177e4SLinus Torvalds static inline int 20031da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 20041da177e4SLinus Torvalds { 20051da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 20061da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds 20091da177e4SLinus Torvalds static 2010b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 20111da177e4SLinus Torvalds { 2012b37ad28bSAl Viro __be32 status = nfserr_openmode; 20131da177e4SLinus Torvalds 20141da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20151da177e4SLinus Torvalds goto out; 20161da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20171da177e4SLinus Torvalds goto out; 20181da177e4SLinus Torvalds status = nfs_ok; 20191da177e4SLinus Torvalds out: 20201da177e4SLinus Torvalds return status; 20211da177e4SLinus Torvalds } 20221da177e4SLinus Torvalds 2023b37ad28bSAl Viro static inline __be32 20241da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20251da177e4SLinus Torvalds { 2026203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20271da177e4SLinus Torvalds return nfs_ok; 2028af558e33SJ. Bruce Fields else if (locks_in_grace()) { 20291da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20301da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20311da177e4SLinus Torvalds return nfserr_grace; 20321da177e4SLinus Torvalds } else if (flags & WR_STATE) 20331da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20341da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20351da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20361da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20371da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20381da177e4SLinus Torvalds } 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds /* 20411da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20421da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20431da177e4SLinus Torvalds */ 20441da177e4SLinus Torvalds static inline int 204518f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 20461da177e4SLinus Torvalds { 2047203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 20481da177e4SLinus Torvalds } 20491da177e4SLinus Torvalds 20500836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 20510836f587SJ. Bruce Fields { 20520836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 20530836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 20540836f587SJ. Bruce Fields return nfserr_bad_stateid; 20550836f587SJ. Bruce Fields /* 20560836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 20570836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 20580836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 20590836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 20600836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 20610836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 20620836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 20630836f587SJ. Bruce Fields * will just have to retry the IO: 20640836f587SJ. Bruce Fields */ 20650836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 20660836f587SJ. Bruce Fields return nfserr_old_stateid; 20670836f587SJ. Bruce Fields return nfs_ok; 20680836f587SJ. Bruce Fields } 20690836f587SJ. Bruce Fields 20703e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 20713e633079SJ. Bruce Fields { 20723e633079SJ. Bruce Fields return stateid->si_fileid == 0; 20733e633079SJ. Bruce Fields } 20743e633079SJ. Bruce Fields 20751da177e4SLinus Torvalds /* 20761da177e4SLinus Torvalds * Checks for stateid operations 20771da177e4SLinus Torvalds */ 2078b37ad28bSAl Viro __be32 20791da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20801da177e4SLinus Torvalds { 20811da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20821da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20831da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2084b37ad28bSAl Viro __be32 status; 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvalds if (filpp) 20871da177e4SLinus Torvalds *filpp = NULL; 20881da177e4SLinus Torvalds 208918f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 20901da177e4SLinus Torvalds return nfserr_grace; 20911da177e4SLinus Torvalds 20921da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20931da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20941da177e4SLinus Torvalds 20951da177e4SLinus Torvalds status = nfserr_stale_stateid; 20961da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20971da177e4SLinus Torvalds goto out; 20981da177e4SLinus Torvalds 20991da177e4SLinus Torvalds status = nfserr_bad_stateid; 21003e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2101a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 2102819a8f53SJ. Bruce Fields if (!dp) 21031da177e4SLinus Torvalds goto out; 2104fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 21050c2a498fSJ. Bruce Fields if (status) 21060c2a498fSJ. Bruce Fields goto out; 2107dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2108dc9bf700SJ. Bruce Fields if (status) 2109dc9bf700SJ. Bruce Fields goto out; 2110dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2111dc9bf700SJ. Bruce Fields if (filpp) 2112dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 21131da177e4SLinus Torvalds } else { /* open or lock stateid */ 2114a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 2115819a8f53SJ. Bruce Fields if (!stp) 21161da177e4SLinus Torvalds goto out; 21176150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 21181da177e4SLinus Torvalds goto out; 21191da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 21201da177e4SLinus Torvalds goto out; 2121fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 21220836f587SJ. Bruce Fields if (status) 21231da177e4SLinus Torvalds goto out; 2124a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2125a4455be0SJ. Bruce Fields if (status) 21261da177e4SLinus Torvalds goto out; 21271da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21281da177e4SLinus Torvalds if (filpp) 21291da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21301da177e4SLinus Torvalds } 21311da177e4SLinus Torvalds status = nfs_ok; 21321da177e4SLinus Torvalds out: 21331da177e4SLinus Torvalds return status; 21341da177e4SLinus Torvalds } 21351da177e4SLinus Torvalds 21364c4cd222SNeilBrown static inline int 21374c4cd222SNeilBrown setlkflg (int type) 21384c4cd222SNeilBrown { 21394c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21404c4cd222SNeilBrown RD_STATE : WR_STATE; 21414c4cd222SNeilBrown } 21421da177e4SLinus Torvalds 21431da177e4SLinus Torvalds /* 21441da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21451da177e4SLinus Torvalds */ 2146b37ad28bSAl Viro static __be32 21474c4cd222SNeilBrown nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 21481da177e4SLinus Torvalds { 21491da177e4SLinus Torvalds struct nfs4_stateid *stp; 21501da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21510836f587SJ. Bruce Fields __be32 status; 21521da177e4SLinus Torvalds 21531da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21541da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21551da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21561da177e4SLinus Torvalds stateid->si_generation); 21571da177e4SLinus Torvalds 21581da177e4SLinus Torvalds *stpp = NULL; 21591da177e4SLinus Torvalds *sopp = NULL; 21601da177e4SLinus Torvalds 21611da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21622fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21633a4f98bbSNeilBrown return nfserr_bad_stateid; 21641da177e4SLinus Torvalds } 21651da177e4SLinus Torvalds 21661da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21673a4f98bbSNeilBrown return nfserr_stale_stateid; 21681da177e4SLinus Torvalds /* 21691da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21701da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21711da177e4SLinus Torvalds * number is incorrect. 21721da177e4SLinus Torvalds */ 2173f8816512SNeilBrown stp = find_stateid(stateid, flags); 2174f8816512SNeilBrown if (stp == NULL) { 2175f8816512SNeilBrown /* 2176f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2177f8816512SNeilBrown * a replayed close: 2178f8816512SNeilBrown */ 2179f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2180f8816512SNeilBrown if (sop == NULL) 2181f8816512SNeilBrown return nfserr_bad_stateid; 2182f8816512SNeilBrown *sopp = sop; 2183f8816512SNeilBrown goto check_replay; 2184f8816512SNeilBrown } 21851da177e4SLinus Torvalds 218639325bd0SJ. Bruce Fields *stpp = stp; 218739325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 218839325bd0SJ. Bruce Fields 21894c4cd222SNeilBrown if (lock) { 21904c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21911da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21924c4cd222SNeilBrown int lkflg = 0; 2193b37ad28bSAl Viro __be32 status; 21941da177e4SLinus Torvalds 21954c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21964c4cd222SNeilBrown 21974c4cd222SNeilBrown if (lock->lk_is_new) { 21981da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21993a4f98bbSNeilBrown return nfserr_bad_stateid; 2200599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 22013a4f98bbSNeilBrown return nfserr_bad_stateid; 22024c4cd222SNeilBrown /* stp is the open stateid */ 22034c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 22044c4cd222SNeilBrown if (status) 22054c4cd222SNeilBrown return status; 22064c4cd222SNeilBrown } else { 22074c4cd222SNeilBrown /* stp is the lock stateid */ 22084c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 22094c4cd222SNeilBrown if (status) 22104c4cd222SNeilBrown return status; 22114c4cd222SNeilBrown } 22121da177e4SLinus Torvalds } 22131da177e4SLinus Torvalds 2214f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 22152fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 22163a4f98bbSNeilBrown return nfserr_bad_stateid; 22171da177e4SLinus Torvalds } 22181da177e4SLinus Torvalds 22191da177e4SLinus Torvalds /* 22201da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22211da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22221da177e4SLinus Torvalds * generation number wraparound. 22231da177e4SLinus Torvalds */ 2224bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22251da177e4SLinus Torvalds goto check_replay; 22261da177e4SLinus Torvalds 22273a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22282fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 22293a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22303a4f98bbSNeilBrown return nfserr_bad_stateid; 22311da177e4SLinus Torvalds } 22323a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22332fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 22343a4f98bbSNeilBrown " confirmed yet!\n"); 22353a4f98bbSNeilBrown return nfserr_bad_stateid; 22361da177e4SLinus Torvalds } 22370836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 22380836f587SJ. Bruce Fields if (status) 22390836f587SJ. Bruce Fields return status; 224052fd004eSNeilBrown renew_client(sop->so_client); 22413a4f98bbSNeilBrown return nfs_ok; 22421da177e4SLinus Torvalds 22431da177e4SLinus Torvalds check_replay: 2244bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2245849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22461da177e4SLinus Torvalds /* indicate replay to calling function */ 2247a90b061cSAl Viro return nfserr_replay_me; 22481da177e4SLinus Torvalds } 22492fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22503a4f98bbSNeilBrown sop->so_seqid, seqid); 22513a4f98bbSNeilBrown *sopp = NULL; 22523a4f98bbSNeilBrown return nfserr_bad_seqid; 22531da177e4SLinus Torvalds } 22541da177e4SLinus Torvalds 2255b37ad28bSAl Viro __be32 2256ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2257a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22581da177e4SLinus Torvalds { 2259b37ad28bSAl Viro __be32 status; 22601da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22611da177e4SLinus Torvalds struct nfs4_stateid *stp; 22621da177e4SLinus Torvalds 22631da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2264ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2265ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22661da177e4SLinus Torvalds 2267ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2268a8cddc5dSJ. Bruce Fields if (status) 2269a8cddc5dSJ. Bruce Fields return status; 22701da177e4SLinus Torvalds 22711da177e4SLinus Torvalds nfs4_lock_state(); 22721da177e4SLinus Torvalds 2273ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2274ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2275f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 22761da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22771da177e4SLinus Torvalds goto out; 22781da177e4SLinus Torvalds 22791da177e4SLinus Torvalds sop = oc->oc_stateowner; 22801da177e4SLinus Torvalds sop->so_confirmed = 1; 22811da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22821da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22831da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22841da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22851da177e4SLinus Torvalds stp->st_stateid.si_boot, 22861da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22871da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22881da177e4SLinus Torvalds stp->st_stateid.si_generation); 2289c7b9a459SNeilBrown 2290c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22911da177e4SLinus Torvalds out: 2292f2327d9aSNeil Brown if (oc->oc_stateowner) { 22931da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2294a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2295f2327d9aSNeil Brown } 22961da177e4SLinus Torvalds nfs4_unlock_state(); 22971da177e4SLinus Torvalds return status; 22981da177e4SLinus Torvalds } 22991da177e4SLinus Torvalds 23001da177e4SLinus Torvalds 23011da177e4SLinus Torvalds /* 23021da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 23031da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 23041da177e4SLinus Torvalds */ 23051da177e4SLinus Torvalds static void 23061da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 23071da177e4SLinus Torvalds { 23081da177e4SLinus Torvalds int i; 23091da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 23101da177e4SLinus Torvalds if ((i & access) != i) 23111da177e4SLinus Torvalds __clear_bit(i, bmap); 23121da177e4SLinus Torvalds } 23131da177e4SLinus Torvalds } 23141da177e4SLinus Torvalds 23151da177e4SLinus Torvalds static void 23161da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23171da177e4SLinus Torvalds { 23181da177e4SLinus Torvalds int i; 23191da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23201da177e4SLinus Torvalds if ((i & deny) != i) 23211da177e4SLinus Torvalds __clear_bit(i, bmap); 23221da177e4SLinus Torvalds } 23231da177e4SLinus Torvalds } 23241da177e4SLinus Torvalds 2325b37ad28bSAl Viro __be32 2326ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2327ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2328a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 23291da177e4SLinus Torvalds { 2330b37ad28bSAl Viro __be32 status; 23311da177e4SLinus Torvalds struct nfs4_stateid *stp; 23321da177e4SLinus Torvalds unsigned int share_access; 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2335ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2336ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23371da177e4SLinus Torvalds 2338ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2339ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23401da177e4SLinus Torvalds return nfserr_inval; 23411da177e4SLinus Torvalds 23421da177e4SLinus Torvalds nfs4_lock_state(); 2343ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2344ca364317SJ.Bruce Fields od->od_seqid, 23451da177e4SLinus Torvalds &od->od_stateid, 2346f3362737SJ. Bruce Fields OPEN_STATE, 23471da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23481da177e4SLinus Torvalds goto out; 23491da177e4SLinus Torvalds 23501da177e4SLinus Torvalds status = nfserr_inval; 23511da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23521da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23531da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23541da177e4SLinus Torvalds goto out; 23551da177e4SLinus Torvalds } 23561da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23571da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23581da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23591da177e4SLinus Torvalds goto out; 23601da177e4SLinus Torvalds } 23611da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23621da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23631da177e4SLinus Torvalds share_access & ~od->od_share_access); 23641da177e4SLinus Torvalds 23651da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23661da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23671da177e4SLinus Torvalds 23681da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23691da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23701da177e4SLinus Torvalds status = nfs_ok; 23711da177e4SLinus Torvalds out: 2372f2327d9aSNeil Brown if (od->od_stateowner) { 23731da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2374a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2375f2327d9aSNeil Brown } 23761da177e4SLinus Torvalds nfs4_unlock_state(); 23771da177e4SLinus Torvalds return status; 23781da177e4SLinus Torvalds } 23791da177e4SLinus Torvalds 23801da177e4SLinus Torvalds /* 23811da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23821da177e4SLinus Torvalds */ 2383b37ad28bSAl Viro __be32 2384ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2385a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23861da177e4SLinus Torvalds { 2387b37ad28bSAl Viro __be32 status; 23881da177e4SLinus Torvalds struct nfs4_stateid *stp; 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2391ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2392ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23931da177e4SLinus Torvalds 23941da177e4SLinus Torvalds nfs4_lock_state(); 23951da177e4SLinus Torvalds /* check close_lru for replay */ 2396ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2397ca364317SJ.Bruce Fields close->cl_seqid, 23981da177e4SLinus Torvalds &close->cl_stateid, 2399f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 24001da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 24011da177e4SLinus Torvalds goto out; 24021da177e4SLinus Torvalds status = nfs_ok; 24031da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 24041da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 24051da177e4SLinus Torvalds 240604ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 24072283963fSJ. Bruce Fields release_open_stateid(stp); 240804ef5954SJ. Bruce Fields 240904ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 241004ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 241104ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 241204ef5954SJ. Bruce Fields */ 241304ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 241404ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 24151da177e4SLinus Torvalds out: 2416f2327d9aSNeil Brown if (close->cl_stateowner) { 24171da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2418a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2419f2327d9aSNeil Brown } 24201da177e4SLinus Torvalds nfs4_unlock_state(); 24211da177e4SLinus Torvalds return status; 24221da177e4SLinus Torvalds } 24231da177e4SLinus Torvalds 2424b37ad28bSAl Viro __be32 2425ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2426ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 24271da177e4SLinus Torvalds { 2428203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 2429203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 2430203a8c8eSJ. Bruce Fields struct inode *inode; 2431b37ad28bSAl Viro __be32 status; 24321da177e4SLinus Torvalds 2433ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 2434203a8c8eSJ. Bruce Fields return status; 2435203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 24361da177e4SLinus Torvalds 24371da177e4SLinus Torvalds nfs4_lock_state(); 2438203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 2439203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 2440203a8c8eSJ. Bruce Fields goto out; 2441203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 2442203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 2443203a8c8eSJ. Bruce Fields goto out; 24447e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 2445203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 2446203a8c8eSJ. Bruce Fields goto out; 2447203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 2448203a8c8eSJ. Bruce Fields if (!dp) 2449203a8c8eSJ. Bruce Fields goto out; 2450203a8c8eSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 2451203a8c8eSJ. Bruce Fields if (status) 2452203a8c8eSJ. Bruce Fields goto out; 2453203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 2454203a8c8eSJ. Bruce Fields 2455203a8c8eSJ. Bruce Fields unhash_delegation(dp); 24561da177e4SLinus Torvalds out: 2457203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 2458203a8c8eSJ. Bruce Fields 24591da177e4SLinus Torvalds return status; 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds /* 24641da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24651da177e4SLinus Torvalds */ 24661da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24671da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24681da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24691da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24701da177e4SLinus Torvalds 247187df4de8SBenny Halevy static inline u64 247287df4de8SBenny Halevy end_offset(u64 start, u64 len) 247387df4de8SBenny Halevy { 247487df4de8SBenny Halevy u64 end; 247587df4de8SBenny Halevy 247687df4de8SBenny Halevy end = start + len; 247787df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 247887df4de8SBenny Halevy } 247987df4de8SBenny Halevy 248087df4de8SBenny Halevy /* last octet in a range */ 248187df4de8SBenny Halevy static inline u64 248287df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 248387df4de8SBenny Halevy { 248487df4de8SBenny Halevy u64 end; 248587df4de8SBenny Halevy 248687df4de8SBenny Halevy BUG_ON(!len); 248787df4de8SBenny Halevy end = start + len; 248887df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 248987df4de8SBenny Halevy } 249087df4de8SBenny Halevy 24911da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24921da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24931da177e4SLinus Torvalds 24941da177e4SLinus Torvalds static inline unsigned int 24951da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24961da177e4SLinus Torvalds struct xdr_netobj *ownername) 24971da177e4SLinus Torvalds { 24981da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24991da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 25001da177e4SLinus Torvalds & LOCK_HASH_MASK; 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 25041da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 25051da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 25061da177e4SLinus Torvalds 2507fd39ca9aSNeilBrown static struct nfs4_stateid * 25081da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 25091da177e4SLinus Torvalds { 25109346eff0SKrishna Kumar struct nfs4_stateid *local; 25111da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 25121da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 25131da177e4SLinus Torvalds unsigned int hashval; 25141da177e4SLinus Torvalds 25151da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 25169346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 25171da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 25181da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 25191da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 25201da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 25211da177e4SLinus Torvalds return local; 25221da177e4SLinus Torvalds } 25231da177e4SLinus Torvalds } 25249346eff0SKrishna Kumar 25259346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 25261da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 25271da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 25281da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 25291da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 25301da177e4SLinus Torvalds return local; 25311da177e4SLinus Torvalds } 2532849823c5SNeil Brown } 25331da177e4SLinus Torvalds return NULL; 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds static struct nfs4_delegation * 25371da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 25381da177e4SLinus Torvalds { 253913cd2184SNeilBrown struct nfs4_file *fp; 254013cd2184SNeilBrown struct nfs4_delegation *dl; 25411da177e4SLinus Torvalds 25421da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 25431da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 25441da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds fp = find_file(ino); 254713cd2184SNeilBrown if (!fp) 25481da177e4SLinus Torvalds return NULL; 254913cd2184SNeilBrown dl = find_delegation_file(fp, stid); 255013cd2184SNeilBrown put_nfs4_file(fp); 255113cd2184SNeilBrown return dl; 25521da177e4SLinus Torvalds } 25531da177e4SLinus Torvalds 25541da177e4SLinus Torvalds /* 25551da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 25561da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25571da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25581da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25591da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25601da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25611da177e4SLinus Torvalds */ 25621da177e4SLinus Torvalds static inline void 25631da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25641da177e4SLinus Torvalds { 25651da177e4SLinus Torvalds if (lock->fl_start < 0) 25661da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25671da177e4SLinus Torvalds if (lock->fl_end < 0) 25681da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25691da177e4SLinus Torvalds } 25701da177e4SLinus Torvalds 2571d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2572d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2573e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2574d5b9026aSNeilBrown }; 25751da177e4SLinus Torvalds 25761da177e4SLinus Torvalds static inline void 25771da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25781da177e4SLinus Torvalds { 2579d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2580d5b9026aSNeilBrown unsigned int hval; 25811da177e4SLinus Torvalds 2582d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2583d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2584d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25851da177e4SLinus Torvalds kref_get(&sop->so_ref); 25861da177e4SLinus Torvalds deny->ld_sop = sop; 25871da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2588d5b9026aSNeilBrown } else { 2589d5b9026aSNeilBrown deny->ld_sop = NULL; 2590d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2591d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25921da177e4SLinus Torvalds } 25931da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 259487df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 259587df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 25961da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25971da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25981da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25991da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 26001da177e4SLinus Torvalds } 26011da177e4SLinus Torvalds 26021da177e4SLinus Torvalds static struct nfs4_stateowner * 26031da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 26041da177e4SLinus Torvalds struct xdr_netobj *owner) 26051da177e4SLinus Torvalds { 26061da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 26071da177e4SLinus Torvalds struct nfs4_stateowner *op; 26081da177e4SLinus Torvalds 26091da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2610599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 26111da177e4SLinus Torvalds return op; 26121da177e4SLinus Torvalds } 26131da177e4SLinus Torvalds return NULL; 26141da177e4SLinus Torvalds } 26151da177e4SLinus Torvalds 26161da177e4SLinus Torvalds /* 26171da177e4SLinus Torvalds * Alloc a lock owner structure. 26181da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 26191da177e4SLinus Torvalds * occured. 26201da177e4SLinus Torvalds * 26211da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 26221da177e4SLinus Torvalds */ 26231da177e4SLinus Torvalds 26241da177e4SLinus Torvalds static struct nfs4_stateowner * 26251da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 26261da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26271da177e4SLinus Torvalds struct nfs4_replay *rp; 26281da177e4SLinus Torvalds unsigned int idhashval; 26291da177e4SLinus Torvalds 26301da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 26311da177e4SLinus Torvalds return NULL; 26321da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 26331da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 26341da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 26351da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2636ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2637ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 26381da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 26391da177e4SLinus Torvalds sop->so_time = 0; 26401da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 26411da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2642ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 26431da177e4SLinus Torvalds sop->so_is_open_owner = 0; 26441da177e4SLinus Torvalds sop->so_id = current_ownerid++; 26451da177e4SLinus Torvalds sop->so_client = clp; 2646b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2647b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2648b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 26491da177e4SLinus Torvalds sop->so_confirmed = 1; 26501da177e4SLinus Torvalds rp = &sop->so_replay; 2651de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 26521da177e4SLinus Torvalds rp->rp_buflen = 0; 26531da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 26541da177e4SLinus Torvalds return sop; 26551da177e4SLinus Torvalds } 26561da177e4SLinus Torvalds 2657fd39ca9aSNeilBrown static struct nfs4_stateid * 26581da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26591da177e4SLinus Torvalds { 26601da177e4SLinus Torvalds struct nfs4_stateid *stp; 26611da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26621da177e4SLinus Torvalds 26635ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26645ac049acSNeilBrown if (stp == NULL) 26651da177e4SLinus Torvalds goto out; 26661da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26671da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2668ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2669ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26701da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26718beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2672ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26731da177e4SLinus Torvalds stp->st_stateowner = sop; 267413cd2184SNeilBrown get_nfs4_file(fp); 26751da177e4SLinus Torvalds stp->st_file = fp; 26761da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26771da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26781da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26791da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26801da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26811da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26821da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26834c4cd222SNeilBrown stp->st_openstp = open_stp; 26841da177e4SLinus Torvalds 26851da177e4SLinus Torvalds out: 26861da177e4SLinus Torvalds return stp; 26871da177e4SLinus Torvalds } 26881da177e4SLinus Torvalds 2689fd39ca9aSNeilBrown static int 26901da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26911da177e4SLinus Torvalds { 269287df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 26931da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26941da177e4SLinus Torvalds } 26951da177e4SLinus Torvalds 26961da177e4SLinus Torvalds /* 26971da177e4SLinus Torvalds * LOCK operation 26981da177e4SLinus Torvalds */ 2699b37ad28bSAl Viro __be32 2700ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2701a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 27021da177e4SLinus Torvalds { 27033e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2704b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 27051da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 27061da177e4SLinus Torvalds struct file *filp; 27071da177e4SLinus Torvalds struct file_lock file_lock; 27088dc7c311SAndy Adamson struct file_lock conflock; 2709b37ad28bSAl Viro __be32 status = 0; 27101da177e4SLinus Torvalds unsigned int strhashval; 2711150b3934SMarc Eshel unsigned int cmd; 2712b8dd7b9aSAl Viro int err; 27131da177e4SLinus Torvalds 27141da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 27151da177e4SLinus Torvalds (long long) lock->lk_offset, 27161da177e4SLinus Torvalds (long long) lock->lk_length); 27171da177e4SLinus Torvalds 27181da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 27191da177e4SLinus Torvalds return nfserr_inval; 27201da177e4SLinus Torvalds 2721ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 27228837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 2723a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2724a6f6ef2fSAndy Adamson return status; 2725a6f6ef2fSAndy Adamson } 2726a6f6ef2fSAndy Adamson 27271da177e4SLinus Torvalds nfs4_lock_state(); 27281da177e4SLinus Torvalds 27291da177e4SLinus Torvalds if (lock->lk_is_new) { 27301da177e4SLinus Torvalds /* 27311da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2732893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2733893f8770SNeilBrown * lock stateid. 27341da177e4SLinus Torvalds */ 27351da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 27361da177e4SLinus Torvalds struct nfs4_file *fp; 27371da177e4SLinus Torvalds 27381da177e4SLinus Torvalds status = nfserr_stale_clientid; 2739849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 27401da177e4SLinus Torvalds goto out; 27411da177e4SLinus Torvalds 27421da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2743ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27441da177e4SLinus Torvalds lock->lk_new_open_seqid, 27451da177e4SLinus Torvalds &lock->lk_new_open_stateid, 2746f3362737SJ. Bruce Fields OPEN_STATE, 27473a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2748b59e3c0eSNeil Brown lock); 274937515177SNeilBrown if (status) 27501da177e4SLinus Torvalds goto out; 27513a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 27521da177e4SLinus Torvalds /* create lockowner and lock stateid */ 27531da177e4SLinus Torvalds fp = open_stp->st_file; 27541da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 27551da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 27561da177e4SLinus Torvalds &lock->v.new.owner); 27573e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27583e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27593e9e3dbeSNeilBrown * create new stateids)? */ 27601da177e4SLinus Torvalds status = nfserr_resource; 2761b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2762b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2763b59e3c0eSNeil Brown if (lock_sop == NULL) 27641da177e4SLinus Torvalds goto out; 2765b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27668a280510SJ. Bruce Fields if (lock_stp == NULL) 27671da177e4SLinus Torvalds goto out; 27681da177e4SLinus Torvalds } else { 27691da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2770ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27711da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27721da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 2773f3362737SJ. Bruce Fields LOCK_STATE, 27743a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27751da177e4SLinus Torvalds if (status) 27761da177e4SLinus Torvalds goto out; 27773a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27781da177e4SLinus Torvalds } 27793a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27801da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27811da177e4SLinus Torvalds 27820dd395dcSNeilBrown status = nfserr_grace; 2783af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 27840dd395dcSNeilBrown goto out; 27850dd395dcSNeilBrown status = nfserr_no_grace; 2786af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 27870dd395dcSNeilBrown goto out; 27880dd395dcSNeilBrown 27891da177e4SLinus Torvalds locks_init_lock(&file_lock); 27901da177e4SLinus Torvalds switch (lock->lk_type) { 27911da177e4SLinus Torvalds case NFS4_READ_LT: 27921da177e4SLinus Torvalds case NFS4_READW_LT: 27931da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2794150b3934SMarc Eshel cmd = F_SETLK; 27951da177e4SLinus Torvalds break; 27961da177e4SLinus Torvalds case NFS4_WRITE_LT: 27971da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27981da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2799150b3934SMarc Eshel cmd = F_SETLK; 28001da177e4SLinus Torvalds break; 28011da177e4SLinus Torvalds default: 28021da177e4SLinus Torvalds status = nfserr_inval; 28031da177e4SLinus Torvalds goto out; 28041da177e4SLinus Torvalds } 2805b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 28061da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28071da177e4SLinus Torvalds file_lock.fl_file = filp; 28081da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2809d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28101da177e4SLinus Torvalds 28111da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 281287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 28131da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28141da177e4SLinus Torvalds 28151da177e4SLinus Torvalds /* 28161da177e4SLinus Torvalds * Try to lock the file in the VFS. 28171da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 28181da177e4SLinus Torvalds */ 28191da177e4SLinus Torvalds 2820fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2821b8dd7b9aSAl Viro switch (-err) { 28221da177e4SLinus Torvalds case 0: /* success! */ 28231da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 28241da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 28251da177e4SLinus Torvalds sizeof(stateid_t)); 2826b8dd7b9aSAl Viro status = 0; 2827eb76b3fdSAndy Adamson break; 2828eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2829eb76b3fdSAndy Adamson status = nfserr_denied; 2830eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2831eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2832eb76b3fdSAndy Adamson break; 28331da177e4SLinus Torvalds case (EDEADLK): 28341da177e4SLinus Torvalds status = nfserr_deadlock; 2835eb76b3fdSAndy Adamson break; 28361da177e4SLinus Torvalds default: 2837fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2838eb76b3fdSAndy Adamson status = nfserr_resource; 2839eb76b3fdSAndy Adamson break; 28401da177e4SLinus Torvalds } 28411da177e4SLinus Torvalds out: 28428a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 2843f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 28443a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 28453a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2846a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2847f2327d9aSNeil Brown } 28481da177e4SLinus Torvalds nfs4_unlock_state(); 28491da177e4SLinus Torvalds return status; 28501da177e4SLinus Torvalds } 28511da177e4SLinus Torvalds 28521da177e4SLinus Torvalds /* 285355ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 285455ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 285555ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 285655ef1274SJ. Bruce Fields * inode operation.) 285755ef1274SJ. Bruce Fields */ 285855ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 285955ef1274SJ. Bruce Fields { 286055ef1274SJ. Bruce Fields struct file *file; 286155ef1274SJ. Bruce Fields int err; 286255ef1274SJ. Bruce Fields 286355ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 286455ef1274SJ. Bruce Fields if (err) 286555ef1274SJ. Bruce Fields return err; 286655ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 286755ef1274SJ. Bruce Fields nfsd_close(file); 286855ef1274SJ. Bruce Fields return err; 286955ef1274SJ. Bruce Fields } 287055ef1274SJ. Bruce Fields 287155ef1274SJ. Bruce Fields /* 28721da177e4SLinus Torvalds * LOCKT operation 28731da177e4SLinus Torvalds */ 2874b37ad28bSAl Viro __be32 2875ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2876ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 28771da177e4SLinus Torvalds { 28781da177e4SLinus Torvalds struct inode *inode; 28791da177e4SLinus Torvalds struct file_lock file_lock; 2880fd85b817SMarc Eshel int error; 2881b37ad28bSAl Viro __be32 status; 28821da177e4SLinus Torvalds 2883af558e33SJ. Bruce Fields if (locks_in_grace()) 28841da177e4SLinus Torvalds return nfserr_grace; 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28871da177e4SLinus Torvalds return nfserr_inval; 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28901da177e4SLinus Torvalds nfs4_lock_state(); 28911da177e4SLinus Torvalds 28921da177e4SLinus Torvalds status = nfserr_stale_clientid; 2893849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28941da177e4SLinus Torvalds goto out; 28951da177e4SLinus Torvalds 2896ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2897849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28981da177e4SLinus Torvalds if (status == nfserr_symlink) 28991da177e4SLinus Torvalds status = nfserr_inval; 29001da177e4SLinus Torvalds goto out; 29011da177e4SLinus Torvalds } 29021da177e4SLinus Torvalds 2903ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 29041da177e4SLinus Torvalds locks_init_lock(&file_lock); 29051da177e4SLinus Torvalds switch (lockt->lt_type) { 29061da177e4SLinus Torvalds case NFS4_READ_LT: 29071da177e4SLinus Torvalds case NFS4_READW_LT: 29081da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 29091da177e4SLinus Torvalds break; 29101da177e4SLinus Torvalds case NFS4_WRITE_LT: 29111da177e4SLinus Torvalds case NFS4_WRITEW_LT: 29121da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 29131da177e4SLinus Torvalds break; 29141da177e4SLinus Torvalds default: 29152fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 29161da177e4SLinus Torvalds status = nfserr_inval; 29171da177e4SLinus Torvalds goto out; 29181da177e4SLinus Torvalds } 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 29211da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 29221da177e4SLinus Torvalds if (lockt->lt_stateowner) 29231da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 29241da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29251da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 29261da177e4SLinus Torvalds 29271da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 292887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 29291da177e4SLinus Torvalds 29301da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29311da177e4SLinus Torvalds 29321da177e4SLinus Torvalds status = nfs_ok; 293355ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 2934fd85b817SMarc Eshel if (error) { 2935fd85b817SMarc Eshel status = nfserrno(error); 2936fd85b817SMarc Eshel goto out; 2937fd85b817SMarc Eshel } 29389d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 29391da177e4SLinus Torvalds status = nfserr_denied; 29409d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds out: 29431da177e4SLinus Torvalds nfs4_unlock_state(); 29441da177e4SLinus Torvalds return status; 29451da177e4SLinus Torvalds } 29461da177e4SLinus Torvalds 2947b37ad28bSAl Viro __be32 2948ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2949a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 29501da177e4SLinus Torvalds { 29511da177e4SLinus Torvalds struct nfs4_stateid *stp; 29521da177e4SLinus Torvalds struct file *filp = NULL; 29531da177e4SLinus Torvalds struct file_lock file_lock; 2954b37ad28bSAl Viro __be32 status; 2955b8dd7b9aSAl Viro int err; 29561da177e4SLinus Torvalds 29571da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29581da177e4SLinus Torvalds (long long) locku->lu_offset, 29591da177e4SLinus Torvalds (long long) locku->lu_length); 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29621da177e4SLinus Torvalds return nfserr_inval; 29631da177e4SLinus Torvalds 29641da177e4SLinus Torvalds nfs4_lock_state(); 29651da177e4SLinus Torvalds 2966ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 29671da177e4SLinus Torvalds locku->lu_seqid, 29681da177e4SLinus Torvalds &locku->lu_stateid, 2969f3362737SJ. Bruce Fields LOCK_STATE, 29701da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29711da177e4SLinus Torvalds goto out; 29721da177e4SLinus Torvalds 29731da177e4SLinus Torvalds filp = stp->st_vfs_file; 29741da177e4SLinus Torvalds BUG_ON(!filp); 29751da177e4SLinus Torvalds locks_init_lock(&file_lock); 29761da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29771da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29781da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29791da177e4SLinus Torvalds file_lock.fl_file = filp; 29801da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2981d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29821da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29831da177e4SLinus Torvalds 298487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 29851da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29861da177e4SLinus Torvalds 29871da177e4SLinus Torvalds /* 29881da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29891da177e4SLinus Torvalds */ 2990fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2991b8dd7b9aSAl Viro if (err) { 2992fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29931da177e4SLinus Torvalds goto out_nfserr; 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds /* 29961da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29971da177e4SLinus Torvalds */ 29981da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29991da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 30001da177e4SLinus Torvalds 30011da177e4SLinus Torvalds out: 3002f2327d9aSNeil Brown if (locku->lu_stateowner) { 30031da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3004a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3005f2327d9aSNeil Brown } 30061da177e4SLinus Torvalds nfs4_unlock_state(); 30071da177e4SLinus Torvalds return status; 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds out_nfserr: 3010b8dd7b9aSAl Viro status = nfserrno(err); 30111da177e4SLinus Torvalds goto out; 30121da177e4SLinus Torvalds } 30131da177e4SLinus Torvalds 30141da177e4SLinus Torvalds /* 30151da177e4SLinus Torvalds * returns 30161da177e4SLinus Torvalds * 1: locks held by lockowner 30171da177e4SLinus Torvalds * 0: no locks held by lockowner 30181da177e4SLinus Torvalds */ 30191da177e4SLinus Torvalds static int 30201da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 30211da177e4SLinus Torvalds { 30221da177e4SLinus Torvalds struct file_lock **flpp; 30237eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 30241da177e4SLinus Torvalds int status = 0; 30251da177e4SLinus Torvalds 30261da177e4SLinus Torvalds lock_kernel(); 30271da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3028796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 30291da177e4SLinus Torvalds status = 1; 30301da177e4SLinus Torvalds goto out; 30311da177e4SLinus Torvalds } 3032796dadfdSJ. Bruce Fields } 30331da177e4SLinus Torvalds out: 30341da177e4SLinus Torvalds unlock_kernel(); 30351da177e4SLinus Torvalds return status; 30361da177e4SLinus Torvalds } 30371da177e4SLinus Torvalds 3038b37ad28bSAl Viro __be32 3039b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3040b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3041b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 30421da177e4SLinus Torvalds { 30431da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 30443e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 30453e9e3dbeSNeilBrown struct nfs4_stateid *stp; 30461da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 30473e9e3dbeSNeilBrown struct list_head matches; 30483e9e3dbeSNeilBrown int i; 3049b37ad28bSAl Viro __be32 status; 30501da177e4SLinus Torvalds 30511da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 30521da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30531da177e4SLinus Torvalds 30541da177e4SLinus Torvalds /* XXX check for lease expiration */ 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds status = nfserr_stale_clientid; 3057849823c5SNeil Brown if (STALE_CLIENTID(clid)) 30581da177e4SLinus Torvalds return status; 30591da177e4SLinus Torvalds 30601da177e4SLinus Torvalds nfs4_lock_state(); 30611da177e4SLinus Torvalds 30621da177e4SLinus Torvalds status = nfserr_locks_held; 30633e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30643e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30653e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30663e9e3dbeSNeilBrown * data structures. */ 30673e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30683e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30693e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3070599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 30713e9e3dbeSNeilBrown continue; 30723e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3073ea1da636SNeilBrown st_perstateowner) { 30743e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30751da177e4SLinus Torvalds goto out; 30763e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30773e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30783e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30791da177e4SLinus Torvalds } 30803e9e3dbeSNeilBrown } 30813e9e3dbeSNeilBrown } 30823e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30833e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30843e9e3dbeSNeilBrown * have been checked. */ 30851da177e4SLinus Torvalds status = nfs_ok; 30860fa822e4SNeilBrown while (!list_empty(&matches)) { 30870fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30880fa822e4SNeilBrown so_perclient); 30890fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30900fa822e4SNeilBrown * for openowners. */ 30910fa822e4SNeilBrown list_del(&sop->so_perclient); 3092f044ff83SJ. Bruce Fields release_lockowner(sop); 30931da177e4SLinus Torvalds } 30941da177e4SLinus Torvalds out: 30951da177e4SLinus Torvalds nfs4_unlock_state(); 30961da177e4SLinus Torvalds return status; 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3100a55370a3SNeilBrown alloc_reclaim(void) 31011da177e4SLinus Torvalds { 3102a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 31031da177e4SLinus Torvalds } 31041da177e4SLinus Torvalds 3105c7b9a459SNeilBrown int 3106c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3107c7b9a459SNeilBrown { 3108c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3109c7b9a459SNeilBrown struct nfs4_client *clp; 3110c7b9a459SNeilBrown 3111c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3112c7b9a459SNeilBrown return clp ? 1 : 0; 3113c7b9a459SNeilBrown } 3114c7b9a459SNeilBrown 31151da177e4SLinus Torvalds /* 31161da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 31171da177e4SLinus Torvalds */ 3118190e4fbfSNeilBrown int 3119190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 31201da177e4SLinus Torvalds { 31211da177e4SLinus Torvalds unsigned int strhashval; 31221da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31231da177e4SLinus Torvalds 3124a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3125a55370a3SNeilBrown crp = alloc_reclaim(); 31261da177e4SLinus Torvalds if (!crp) 31271da177e4SLinus Torvalds return 0; 3128a55370a3SNeilBrown strhashval = clientstr_hashval(name); 31291da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 31301da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3131a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 31321da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 31331da177e4SLinus Torvalds return 1; 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds 31361da177e4SLinus Torvalds static void 31371da177e4SLinus Torvalds nfs4_release_reclaim(void) 31381da177e4SLinus Torvalds { 31391da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31401da177e4SLinus Torvalds int i; 31411da177e4SLinus Torvalds 31421da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31431da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 31441da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 31451da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 31461da177e4SLinus Torvalds list_del(&crp->cr_strhash); 31471da177e4SLinus Torvalds kfree(crp); 31481da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 31491da177e4SLinus Torvalds } 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 31521da177e4SLinus Torvalds } 31531da177e4SLinus Torvalds 31541da177e4SLinus Torvalds /* 31551da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3156fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31571da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31581da177e4SLinus Torvalds { 31591da177e4SLinus Torvalds unsigned int strhashval; 31601da177e4SLinus Torvalds struct nfs4_client *clp; 31611da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31621da177e4SLinus Torvalds 31631da177e4SLinus Torvalds 31641da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31651da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31661da177e4SLinus Torvalds if (clp == NULL) 31671da177e4SLinus Torvalds return NULL; 31681da177e4SLinus Torvalds 3169a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3170a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3171a55370a3SNeilBrown clp->cl_recdir); 31721da177e4SLinus Torvalds 31731da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3174a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31751da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3176a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31771da177e4SLinus Torvalds return crp; 31781da177e4SLinus Torvalds } 31791da177e4SLinus Torvalds } 31801da177e4SLinus Torvalds return NULL; 31811da177e4SLinus Torvalds } 31821da177e4SLinus Torvalds 31831da177e4SLinus Torvalds /* 31841da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31851da177e4SLinus Torvalds */ 3186b37ad28bSAl Viro __be32 31871da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31881da177e4SLinus Torvalds { 3189dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31901da177e4SLinus Torvalds } 31911da177e4SLinus Torvalds 3192ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31931da177e4SLinus Torvalds 3194e8ff2a84SJ. Bruce Fields int 3195ac4d8ff2SNeilBrown nfs4_state_init(void) 31961da177e4SLinus Torvalds { 3197e8ff2a84SJ. Bruce Fields int i, status; 31981da177e4SLinus Torvalds 3199e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3200e8ff2a84SJ. Bruce Fields if (status) 3201e8ff2a84SJ. Bruce Fields return status; 32021da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32031da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 32041da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 32051da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 32061da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 32071da177e4SLinus Torvalds } 32081da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 32091da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 32101da177e4SLinus Torvalds } 32111da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 32121da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 32131da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 32141da177e4SLinus Torvalds } 32151da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 32161da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 32171da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 32181da177e4SLinus Torvalds } 32191da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 32201da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 32211da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 32241da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 32251da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 32261da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3227ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3228ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3229ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3230e8ff2a84SJ. Bruce Fields return 0; 3231ac4d8ff2SNeilBrown } 3232ac4d8ff2SNeilBrown 3233190e4fbfSNeilBrown static void 3234190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3235190e4fbfSNeilBrown { 3236190e4fbfSNeilBrown int status; 3237190e4fbfSNeilBrown 32380964a3d3SNeilBrown nfs4_lock_state(); 32390964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3240190e4fbfSNeilBrown status = nfsd4_recdir_load(); 32410964a3d3SNeilBrown nfs4_unlock_state(); 3242190e4fbfSNeilBrown if (status) 3243190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3244190e4fbfSNeilBrown } 3245190e4fbfSNeilBrown 32469a8db97eSMarc Eshel unsigned long 32479a8db97eSMarc Eshel get_nfs4_grace_period(void) 32489a8db97eSMarc Eshel { 32499a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 32509a8db97eSMarc Eshel } 32519a8db97eSMarc Eshel 3252c2f1a551SMeelap Shah /* 3253c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3254c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3255c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3256c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3257c2f1a551SMeelap Shah * 3258c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3259c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3260c2f1a551SMeelap Shah */ 3261c2f1a551SMeelap Shah static void 3262c2f1a551SMeelap Shah set_max_delegations(void) 3263c2f1a551SMeelap Shah { 3264c2f1a551SMeelap Shah /* 3265c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3266c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3267c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3268c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3269c2f1a551SMeelap Shah */ 3270c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3271c2f1a551SMeelap Shah } 3272c2f1a551SMeelap Shah 3273ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3274ac4d8ff2SNeilBrown 3275ac4d8ff2SNeilBrown static void 3276ac4d8ff2SNeilBrown __nfs4_state_start(void) 3277ac4d8ff2SNeilBrown { 32789a8db97eSMarc Eshel unsigned long grace_time; 3279ac4d8ff2SNeilBrown 32801da177e4SLinus Torvalds boot_time = get_seconds(); 3281af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3282d99a05adSNeilBrown lease_time = user_lease_time; 3283af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 32849a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32859a8db97eSMarc Eshel grace_time/HZ); 328658da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32879a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3288c2f1a551SMeelap Shah set_max_delegations(); 32891da177e4SLinus Torvalds } 32901da177e4SLinus Torvalds 3291e8ff2a84SJ. Bruce Fields void 329276a3550eSNeilBrown nfs4_state_start(void) 32931da177e4SLinus Torvalds { 32941da177e4SLinus Torvalds if (nfs4_init) 3295e8ff2a84SJ. Bruce Fields return; 3296190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 329776a3550eSNeilBrown __nfs4_state_start(); 32981da177e4SLinus Torvalds nfs4_init = 1; 3299e8ff2a84SJ. Bruce Fields return; 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds 33021da177e4SLinus Torvalds time_t 33031da177e4SLinus Torvalds nfs4_lease_time(void) 33041da177e4SLinus Torvalds { 33051da177e4SLinus Torvalds return lease_time; 33061da177e4SLinus Torvalds } 33071da177e4SLinus Torvalds 33081da177e4SLinus Torvalds static void 33091da177e4SLinus Torvalds __nfs4_state_shutdown(void) 33101da177e4SLinus Torvalds { 33111da177e4SLinus Torvalds int i; 33121da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 33131da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 33141da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 33151da177e4SLinus Torvalds 33161da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 33171da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 33181da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 33191da177e4SLinus Torvalds expire_client(clp); 33201da177e4SLinus Torvalds } 33211da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 33221da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 33231da177e4SLinus Torvalds expire_client(clp); 33241da177e4SLinus Torvalds } 33251da177e4SLinus Torvalds } 33261da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 33271da177e4SLinus Torvalds spin_lock(&recall_lock); 33281da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 33291da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 33301da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 33311da177e4SLinus Torvalds } 33321da177e4SLinus Torvalds spin_unlock(&recall_lock); 33331da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 33341da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 33351da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 33361da177e4SLinus Torvalds unhash_delegation(dp); 33371da177e4SLinus Torvalds } 33381da177e4SLinus Torvalds 3339190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 33401da177e4SLinus Torvalds nfs4_init = 0; 33411da177e4SLinus Torvalds } 33421da177e4SLinus Torvalds 33431da177e4SLinus Torvalds void 33441da177e4SLinus Torvalds nfs4_state_shutdown(void) 33451da177e4SLinus Torvalds { 33465e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 33475e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 33482c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 33491da177e4SLinus Torvalds nfs4_lock_state(); 33501da177e4SLinus Torvalds nfs4_release_reclaim(); 33511da177e4SLinus Torvalds __nfs4_state_shutdown(); 33521da177e4SLinus Torvalds nfs4_unlock_state(); 33531da177e4SLinus Torvalds } 33541da177e4SLinus Torvalds 33553dd98a3bSJeff Layton /* 33563dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 33573dd98a3bSJeff Layton * accessed when nfsd is starting. 33583dd98a3bSJeff Layton */ 33590964a3d3SNeilBrown static void 33600964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33610964a3d3SNeilBrown { 33620964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33630964a3d3SNeilBrown } 33640964a3d3SNeilBrown 33650964a3d3SNeilBrown /* 33660964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33670964a3d3SNeilBrown */ 33680964a3d3SNeilBrown int 33690964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33700964a3d3SNeilBrown { 33710964a3d3SNeilBrown int status; 3372a63bb996SAl Viro struct path path; 33730964a3d3SNeilBrown 3374a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 33750964a3d3SNeilBrown if (status) 33760964a3d3SNeilBrown return status; 33770964a3d3SNeilBrown status = -ENOTDIR; 3378a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 33790964a3d3SNeilBrown nfs4_set_recdir(recdir); 33800964a3d3SNeilBrown status = 0; 33810964a3d3SNeilBrown } 3382a63bb996SAl Viro path_put(&path); 33830964a3d3SNeilBrown return status; 33840964a3d3SNeilBrown } 33850964a3d3SNeilBrown 33863dd98a3bSJeff Layton char * 33873dd98a3bSJeff Layton nfs4_recoverydir(void) 33883dd98a3bSJeff Layton { 33893dd98a3bSJeff Layton return user_recovery_dirname; 33903dd98a3bSJeff Layton } 33913dd98a3bSJeff Layton 33921da177e4SLinus Torvalds /* 33931da177e4SLinus Torvalds * Called when leasetime is changed. 33941da177e4SLinus Torvalds * 3395d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3396d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3397d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3398d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3399d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 34003dd98a3bSJeff Layton * 34013dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 34023dd98a3bSJeff Layton * when nfsd is starting 34031da177e4SLinus Torvalds */ 34041da177e4SLinus Torvalds void 34051da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 34061da177e4SLinus Torvalds { 3407d99a05adSNeilBrown user_lease_time = leasetime; 34081da177e4SLinus Torvalds } 3409