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 } 5141da177e4SLinus Torvalds put_nfs4_client(clp); 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 51735bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 51835bba9a3SJ. Bruce Fields { 5191da177e4SLinus Torvalds struct nfs4_client *clp; 5201da177e4SLinus Torvalds 52135bba9a3SJ. Bruce Fields clp = alloc_client(name); 52235bba9a3SJ. Bruce Fields if (clp == NULL) 52335bba9a3SJ. Bruce Fields return NULL; 524a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 5251da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 5261da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 5271da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 5281da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 529ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 530ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 5319fb87070SMarc Eshel INIT_LIST_HEAD(&clp->cl_sessions); 5321da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 5331da177e4SLinus Torvalds return clp; 5341da177e4SLinus Torvalds } 5351da177e4SLinus Torvalds 53635bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 53735bba9a3SJ. Bruce Fields { 53835bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 53935bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 54235bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 54335bba9a3SJ. Bruce Fields { 5441da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 5451da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 54835bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 54935bba9a3SJ. Bruce Fields { 5501da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 5511da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 5521da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 5531da177e4SLinus Torvalds get_group_info(target->cr_group_info); 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 55635bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 557599e0a22SJ. Bruce Fields { 558a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds static int 562599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 563599e0a22SJ. Bruce Fields { 564599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5671da177e4SLinus Torvalds static int 568599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 569599e0a22SJ. Bruce Fields { 570599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 5711da177e4SLinus Torvalds } 5721da177e4SLinus Torvalds 5731da177e4SLinus Torvalds /* XXX what about NGROUP */ 5741da177e4SLinus Torvalds static int 575599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 576599e0a22SJ. Bruce Fields { 577599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 5781da177e4SLinus Torvalds } 5791da177e4SLinus Torvalds 5805ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 5815ec7b46cSJ. Bruce Fields { 5825ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 5835ec7b46cSJ. Bruce Fields 5841da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 5851da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 5861da177e4SLinus Torvalds } 5871da177e4SLinus Torvalds 588deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 589deda2faaSJ. Bruce Fields { 590deda2faaSJ. Bruce Fields static u32 i; 5911da177e4SLinus Torvalds u32 *p; 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 594deda2faaSJ. Bruce Fields *p++ = get_seconds(); 595deda2faaSJ. Bruce Fields *p++ = i++; 5961da177e4SLinus Torvalds } 5971da177e4SLinus Torvalds 59835bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 59935bba9a3SJ. Bruce Fields { 6001da177e4SLinus Torvalds if (name.len == 0) 6011da177e4SLinus Torvalds return 0; 6021da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 6032fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 6041da177e4SLinus Torvalds return 0; 6051da177e4SLinus Torvalds } 6061da177e4SLinus Torvalds return 1; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds 609fd39ca9aSNeilBrown static void 6101da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 6111da177e4SLinus Torvalds { 6121da177e4SLinus Torvalds unsigned int idhashval; 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 6151da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6161da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 6171da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 6181da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 621fd39ca9aSNeilBrown static void 6221da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6251da177e4SLinus Torvalds unsigned int strhashval; 6261da177e4SLinus Torvalds 6271da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 6281da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 629f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 630a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 6311da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 6321da177e4SLinus Torvalds renew_client(clp); 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds static struct nfs4_client * 6361da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 6371da177e4SLinus Torvalds { 6381da177e4SLinus Torvalds struct nfs4_client *clp; 6391da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 6401da177e4SLinus Torvalds 6411da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 642599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 6431da177e4SLinus Torvalds return clp; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds return NULL; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds static struct nfs4_client * 6491da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 6501da177e4SLinus Torvalds { 6511da177e4SLinus Torvalds struct nfs4_client *clp; 6521da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 6531da177e4SLinus Torvalds 6541da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 655599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 6561da177e4SLinus Torvalds return clp; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds return NULL; 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 66128ce6054SNeilBrown static struct nfs4_client * 66228ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 66328ce6054SNeilBrown { 66428ce6054SNeilBrown struct nfs4_client *clp; 66528ce6054SNeilBrown 66628ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 66728ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 66828ce6054SNeilBrown return clp; 66928ce6054SNeilBrown } 67028ce6054SNeilBrown return NULL; 67128ce6054SNeilBrown } 67228ce6054SNeilBrown 67328ce6054SNeilBrown static struct nfs4_client * 67428ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 67528ce6054SNeilBrown { 67628ce6054SNeilBrown struct nfs4_client *clp; 67728ce6054SNeilBrown 67828ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 67928ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 68028ce6054SNeilBrown return clp; 68128ce6054SNeilBrown } 68228ce6054SNeilBrown return NULL; 68328ce6054SNeilBrown } 68428ce6054SNeilBrown 6851da177e4SLinus Torvalds /* a helper function for parse_callback */ 6861da177e4SLinus Torvalds static int 6871da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 6881da177e4SLinus Torvalds { 6891da177e4SLinus Torvalds unsigned int len = *lenp; 6901da177e4SLinus Torvalds char *p = *addrp; 6911da177e4SLinus Torvalds int n = -1; 6921da177e4SLinus Torvalds char c; 6931da177e4SLinus Torvalds 6941da177e4SLinus Torvalds for (;;) { 6951da177e4SLinus Torvalds if (!len) 6961da177e4SLinus Torvalds break; 6971da177e4SLinus Torvalds len--; 6981da177e4SLinus Torvalds c = *p++; 6991da177e4SLinus Torvalds if (c == '.') 7001da177e4SLinus Torvalds break; 7011da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 7021da177e4SLinus Torvalds n = -1; 7031da177e4SLinus Torvalds break; 7041da177e4SLinus Torvalds } 7051da177e4SLinus Torvalds if (n < 0) 7061da177e4SLinus Torvalds n = 0; 7071da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 7081da177e4SLinus Torvalds if (n > 255) { 7091da177e4SLinus Torvalds n = -1; 7101da177e4SLinus Torvalds break; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds } 7131da177e4SLinus Torvalds *lenp = len; 7141da177e4SLinus Torvalds *addrp = p; 7151da177e4SLinus Torvalds return n; 7161da177e4SLinus Torvalds } 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 719fd39ca9aSNeilBrown static int 7201da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 7211da177e4SLinus Torvalds { 7221da177e4SLinus Torvalds int temp = 0; 7231da177e4SLinus Torvalds u32 cbaddr = 0; 7241da177e4SLinus Torvalds u16 cbport = 0; 7251da177e4SLinus Torvalds u32 addrlen = addr_len; 7261da177e4SLinus Torvalds char *addr = addr_val; 7271da177e4SLinus Torvalds int i, shift; 7281da177e4SLinus Torvalds 7291da177e4SLinus Torvalds /* ipaddress */ 7301da177e4SLinus Torvalds shift = 24; 7311da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 7321da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7331da177e4SLinus Torvalds return 0; 7341da177e4SLinus Torvalds } 7351da177e4SLinus Torvalds cbaddr |= (temp << shift); 7361da177e4SLinus Torvalds if (shift > 0) 7371da177e4SLinus Torvalds shift -= 8; 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds *cbaddrp = cbaddr; 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds /* port */ 7421da177e4SLinus Torvalds shift = 8; 7431da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 7441da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7451da177e4SLinus Torvalds return 0; 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds cbport |= (temp << shift); 7481da177e4SLinus Torvalds if (shift > 0) 7491da177e4SLinus Torvalds shift -= 8; 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds *cbportp = cbport; 7521da177e4SLinus Torvalds return 1; 7531da177e4SLinus Torvalds } 7541da177e4SLinus Torvalds 755fd39ca9aSNeilBrown static void 7561da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 7571da177e4SLinus Torvalds { 7581da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 7591da177e4SLinus Torvalds 7601da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 7611da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 7621da177e4SLinus Torvalds goto out_err; 7631da177e4SLinus Torvalds 7641da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 7651da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 7661da177e4SLinus Torvalds goto out_err; 7671da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 7681da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 7691da177e4SLinus Torvalds return; 7701da177e4SLinus Torvalds out_err: 771849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 7721da177e4SLinus Torvalds "will not receive delegations\n", 7731da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 7741da177e4SLinus Torvalds 7751da177e4SLinus Torvalds return; 7761da177e4SLinus Torvalds } 7771da177e4SLinus Torvalds 778b37ad28bSAl Viro __be32 779b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 780b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 7811da177e4SLinus Torvalds { 78227459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 7831da177e4SLinus Torvalds struct xdr_netobj clname = { 7841da177e4SLinus Torvalds .len = setclid->se_namelen, 7851da177e4SLinus Torvalds .data = setclid->se_name, 7861da177e4SLinus Torvalds }; 7871da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7881da177e4SLinus Torvalds unsigned int strhashval; 78928ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 790b37ad28bSAl Viro __be32 status; 79168e76ad0SOlga Kornievskaia char *princ; 792a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7931da177e4SLinus Torvalds 7941da177e4SLinus Torvalds if (!check_name(clname)) 79573aea4ecSNeil Brown return nfserr_inval; 7961da177e4SLinus Torvalds 797a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 798a55370a3SNeilBrown if (status) 79973aea4ecSNeil Brown return status; 800a55370a3SNeilBrown 8011da177e4SLinus Torvalds /* 8021da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8031da177e4SLinus Torvalds * We get here on a DRC miss. 8041da177e4SLinus Torvalds */ 8051da177e4SLinus Torvalds 806a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 8071da177e4SLinus Torvalds 8081da177e4SLinus Torvalds nfs4_lock_state(); 80928ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 81028ce6054SNeilBrown if (conf) { 811a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 8121da177e4SLinus Torvalds status = nfserr_clid_inuse; 813026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 814026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client" 815026722c2SJ. Bruce Fields " at %pI4\n", &conf->cl_addr); 8161da177e4SLinus Torvalds goto out; 8171da177e4SLinus Torvalds } 8181da177e4SLinus Torvalds } 819a186e767SJ. Bruce Fields /* 820a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 821a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 822a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 823a186e767SJ. Bruce Fields */ 82428ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 8251da177e4SLinus Torvalds status = nfserr_resource; 8261da177e4SLinus Torvalds if (!conf) { 8271da177e4SLinus Torvalds /* 828a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 829a186e767SJ. Bruce Fields * placed first, because it is the normal case 8301da177e4SLinus Torvalds */ 8311da177e4SLinus Torvalds if (unconf) 8321da177e4SLinus Torvalds expire_client(unconf); 833a55370a3SNeilBrown new = create_client(clname, dname); 834a55370a3SNeilBrown if (new == NULL) 8351da177e4SLinus Torvalds goto out; 8361da177e4SLinus Torvalds gen_clid(new); 837599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 8381da177e4SLinus Torvalds /* 839a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 840a186e767SJ. Bruce Fields * probable callback update 8411da177e4SLinus Torvalds */ 84231f4a6c1SNeilBrown if (unconf) { 84331f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 84431f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 84531f4a6c1SNeilBrown * This has the advantage that there is at most 84631f4a6c1SNeilBrown * one {*x***} in either list at any time. 84731f4a6c1SNeilBrown */ 8481da177e4SLinus Torvalds expire_client(unconf); 8491da177e4SLinus Torvalds } 850a55370a3SNeilBrown new = create_client(clname, dname); 851a55370a3SNeilBrown if (new == NULL) 8521da177e4SLinus Torvalds goto out; 8531da177e4SLinus Torvalds copy_clid(new, conf); 8541da177e4SLinus Torvalds } else if (!unconf) { 8551da177e4SLinus Torvalds /* 856a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 857a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 858a186e767SJ. Bruce Fields * confirmed. 8591da177e4SLinus Torvalds */ 860a55370a3SNeilBrown new = create_client(clname, dname); 861a55370a3SNeilBrown if (new == NULL) 8621da177e4SLinus Torvalds goto out; 8631da177e4SLinus Torvalds gen_clid(new); 86449ba8781SJ. Bruce Fields } else { 8651da177e4SLinus Torvalds /* 866a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 867a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 868a186e767SJ. Bruce Fields * confirmed. 8691da177e4SLinus Torvalds */ 8701da177e4SLinus Torvalds expire_client(unconf); 871a55370a3SNeilBrown new = create_client(clname, dname); 872a55370a3SNeilBrown if (new == NULL) 8731da177e4SLinus Torvalds goto out; 8741da177e4SLinus Torvalds gen_clid(new); 8751da177e4SLinus Torvalds } 876c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 877c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 87861054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 87968e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 88068e76ad0SOlga Kornievskaia if (princ) { 88168e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 88268e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 88368e76ad0SOlga Kornievskaia free_client(new); 88468e76ad0SOlga Kornievskaia goto out; 88568e76ad0SOlga Kornievskaia } 88668e76ad0SOlga Kornievskaia } 887c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 888c175b83cSJ. Bruce Fields gen_confirm(new); 889c175b83cSJ. Bruce Fields gen_callback(new, setclid); 890c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 8911da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8921da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8931da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8941da177e4SLinus Torvalds status = nfs_ok; 8951da177e4SLinus Torvalds out: 8961da177e4SLinus Torvalds nfs4_unlock_state(); 8971da177e4SLinus Torvalds return status; 8981da177e4SLinus Torvalds } 8991da177e4SLinus Torvalds 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds /* 902a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 903a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 904a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 9051da177e4SLinus Torvalds */ 906b37ad28bSAl Viro __be32 907b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 908b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 909b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 9101da177e4SLinus Torvalds { 91127459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 91221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 9131da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 9141da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 915b37ad28bSAl Viro __be32 status; 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 9181da177e4SLinus Torvalds return nfserr_stale_clientid; 9191da177e4SLinus Torvalds /* 9201da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 9211da177e4SLinus Torvalds * We get here on a DRC miss. 9221da177e4SLinus Torvalds */ 9231da177e4SLinus Torvalds 9241da177e4SLinus Torvalds nfs4_lock_state(); 92521ab45a4SNeilBrown 92621ab45a4SNeilBrown conf = find_confirmed_client(clid); 92721ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 92821ab45a4SNeilBrown 92922de4d83SNeilBrown status = nfserr_clid_inuse; 93027459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 9311da177e4SLinus Torvalds goto out; 93227459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 9331da177e4SLinus Torvalds goto out; 93421ab45a4SNeilBrown 935a186e767SJ. Bruce Fields /* 936a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 937a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 938a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 939a186e767SJ. Bruce Fields */ 940366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 941a186e767SJ. Bruce Fields /* 942a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 943a186e767SJ. Bruce Fields * callback update 9447c79f737SNeilBrown */ 945599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 9461da177e4SLinus Torvalds status = nfserr_clid_inuse; 9471da177e4SLinus Torvalds else { 9481a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9491a69c179SNeilBrown * change request correctly. */ 950cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 95121ab45a4SNeilBrown gen_confirm(conf); 95246309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9531a69c179SNeilBrown expire_client(unconf); 9541da177e4SLinus Torvalds status = nfs_ok; 9551a69c179SNeilBrown 9561da177e4SLinus Torvalds } 957f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 958a186e767SJ. Bruce Fields /* 959a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 960a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 961a186e767SJ. Bruce Fields * do nothing. 9627c79f737SNeilBrown */ 963599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 9641da177e4SLinus Torvalds status = nfserr_clid_inuse; 96521ab45a4SNeilBrown else 9661da177e4SLinus Torvalds status = nfs_ok; 9677c79f737SNeilBrown } else if (!conf && unconf 968599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 969a186e767SJ. Bruce Fields /* 970a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 971a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 9721da177e4SLinus Torvalds */ 973599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9741da177e4SLinus Torvalds status = nfserr_clid_inuse; 9751da177e4SLinus Torvalds } else { 9761a69c179SNeilBrown unsigned int hash = 9771a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9781a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9791a69c179SNeilBrown hash); 9801a69c179SNeilBrown if (conf) { 981c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9821a69c179SNeilBrown expire_client(conf); 9831a69c179SNeilBrown } 9841da177e4SLinus Torvalds move_to_confirmed(unconf); 98521ab45a4SNeilBrown conf = unconf; 98646f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 9871a69c179SNeilBrown status = nfs_ok; 9881da177e4SLinus Torvalds } 989599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 990599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 9917c79f737SNeilBrown &confirm)))) { 992a186e767SJ. Bruce Fields /* 993a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 994a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 9951da177e4SLinus Torvalds */ 9961da177e4SLinus Torvalds status = nfserr_stale_clientid; 9977c79f737SNeilBrown } else { 9981da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 99922de4d83SNeilBrown status = nfserr_clid_inuse; 100008e8987cSNeilBrown } 10011da177e4SLinus Torvalds out: 10021da177e4SLinus Torvalds nfs4_unlock_state(); 10031da177e4SLinus Torvalds return status; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds /* OPEN Share state helper functions */ 10071da177e4SLinus Torvalds static inline struct nfs4_file * 10081da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 10091da177e4SLinus Torvalds { 10101da177e4SLinus Torvalds struct nfs4_file *fp; 10111da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 10121da177e4SLinus Torvalds 1013e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1014e60d4398SNeilBrown if (fp) { 10158b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 10161da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 10178beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 10188beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 10198b671b80SJ. Bruce Fields spin_lock(&recall_lock); 10201da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 10218b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 10221da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 10231da177e4SLinus Torvalds fp->fi_id = current_fileid++; 102447f9940cSMeelap Shah fp->fi_had_conflict = false; 10251da177e4SLinus Torvalds return fp; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds return NULL; 10281da177e4SLinus Torvalds } 10291da177e4SLinus Torvalds 10301da177e4SLinus Torvalds static void 1031e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1032e60d4398SNeilBrown { 1033e60d4398SNeilBrown if (*slab == NULL) 1034e60d4398SNeilBrown return; 10351a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1036e60d4398SNeilBrown *slab = NULL; 1037e60d4398SNeilBrown } 1038e60d4398SNeilBrown 1039e8ff2a84SJ. Bruce Fields void 1040e60d4398SNeilBrown nfsd4_free_slabs(void) 1041e60d4398SNeilBrown { 1042e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1043e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10445ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10455b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1046e60d4398SNeilBrown } 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds static int 10491da177e4SLinus Torvalds nfsd4_init_slabs(void) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 105220c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1053e60d4398SNeilBrown if (stateowner_slab == NULL) 1054e60d4398SNeilBrown goto out_nomem; 1055e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 105620c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1057e60d4398SNeilBrown if (file_slab == NULL) 1058e60d4398SNeilBrown goto out_nomem; 10595ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 106020c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 10615ac049acSNeilBrown if (stateid_slab == NULL) 10625ac049acSNeilBrown goto out_nomem; 10635b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 106420c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 10655b2d21c1SNeilBrown if (deleg_slab == NULL) 10665b2d21c1SNeilBrown goto out_nomem; 1067e60d4398SNeilBrown return 0; 1068e60d4398SNeilBrown out_nomem: 1069e60d4398SNeilBrown nfsd4_free_slabs(); 10701da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10711da177e4SLinus Torvalds return -ENOMEM; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds void 10751da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10761da177e4SLinus Torvalds { 10771da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10781da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10791da177e4SLinus Torvalds kfree(sop->so_owner.data); 10801da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10841da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10851da177e4SLinus Torvalds { 10861da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10871da177e4SLinus Torvalds 10881da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10891da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10901da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10911da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10921da177e4SLinus Torvalds kref_init(&sop->so_ref); 10931da177e4SLinus Torvalds return sop; 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds return NULL; 10981da177e4SLinus Torvalds } 10991da177e4SLinus Torvalds 11001da177e4SLinus Torvalds static struct nfs4_stateowner * 11011da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 11021da177e4SLinus Torvalds struct nfs4_stateowner *sop; 11031da177e4SLinus Torvalds struct nfs4_replay *rp; 11041da177e4SLinus Torvalds unsigned int idhashval; 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 11071da177e4SLinus Torvalds return NULL; 11081da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 11091da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 11101da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 11111da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1112ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1113ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 11141da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 11151da177e4SLinus Torvalds sop->so_time = 0; 11161da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 11171da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1118ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 11191da177e4SLinus Torvalds sop->so_is_open_owner = 1; 11201da177e4SLinus Torvalds sop->so_id = current_ownerid++; 11211da177e4SLinus Torvalds sop->so_client = clp; 11221da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 11231da177e4SLinus Torvalds sop->so_confirmed = 0; 11241da177e4SLinus Torvalds rp = &sop->so_replay; 1125de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11261da177e4SLinus Torvalds rp->rp_buflen = 0; 11271da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11281da177e4SLinus Torvalds return sop; 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds 11311da177e4SLinus Torvalds static inline void 11321da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11331da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11341da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11351da177e4SLinus Torvalds 11361da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1137ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1138ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11391da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11401da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1141ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11428beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11431da177e4SLinus Torvalds stp->st_stateowner = sop; 114413cd2184SNeilBrown get_nfs4_file(fp); 11451da177e4SLinus Torvalds stp->st_file = fp; 11461da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11471da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11481da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11491da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11501da177e4SLinus Torvalds stp->st_access_bmap = 0; 11511da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11521da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11531da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11544c4cd222SNeilBrown stp->st_openstp = NULL; 11551da177e4SLinus Torvalds } 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds static void 11581da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11611da177e4SLinus Torvalds 1162358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11631da177e4SLinus Torvalds sop->so_time = get_seconds(); 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds static int 1167599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1168599e0a22SJ. Bruce Fields clientid_t *clid) 1169599e0a22SJ. Bruce Fields { 1170599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1171599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1172599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11731da177e4SLinus Torvalds } 11741da177e4SLinus Torvalds 11751da177e4SLinus Torvalds static struct nfs4_stateowner * 11761da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 11771da177e4SLinus Torvalds { 11781da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 11791da177e4SLinus Torvalds 11801da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1181599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 11821da177e4SLinus Torvalds return so; 11831da177e4SLinus Torvalds } 11841da177e4SLinus Torvalds return NULL; 11851da177e4SLinus Torvalds } 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 11881da177e4SLinus Torvalds static struct nfs4_file * 11891da177e4SLinus Torvalds find_file(struct inode *ino) 11901da177e4SLinus Torvalds { 11911da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 11921da177e4SLinus Torvalds struct nfs4_file *fp; 11931da177e4SLinus Torvalds 11948b671b80SJ. Bruce Fields spin_lock(&recall_lock); 11951da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 119613cd2184SNeilBrown if (fp->fi_inode == ino) { 119713cd2184SNeilBrown get_nfs4_file(fp); 11988b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 11991da177e4SLinus Torvalds return fp; 12001da177e4SLinus Torvalds } 120113cd2184SNeilBrown } 12028b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 12031da177e4SLinus Torvalds return NULL; 12041da177e4SLinus Torvalds } 12051da177e4SLinus Torvalds 12068838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1207ba5a6a19SJ. Bruce Fields { 12088838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 12098838dc43SJ. Bruce Fields return 0; 12108838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 12118838dc43SJ. Bruce Fields return 0; 12128838dc43SJ. Bruce Fields return 1; 1213ba5a6a19SJ. Bruce Fields } 1214ba5a6a19SJ. Bruce Fields 12158838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1216ba5a6a19SJ. Bruce Fields { 12178838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 12188838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1219ba5a6a19SJ. Bruce Fields } 12201da177e4SLinus Torvalds 12214f83aa30SJ. Bruce Fields /* 12224f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 12234f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 12244f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 12254f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 12264f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 12274f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 12284f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 12294f83aa30SJ. Bruce Fields * 12304f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 12314f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 12324f83aa30SJ. Bruce Fields * 12334f83aa30SJ. Bruce Fields * OPEN allow read, deny write 12344f83aa30SJ. Bruce Fields * OPEN allow both, deny none 12354f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 12364f83aa30SJ. Bruce Fields * 12374f83aa30SJ. Bruce Fields * which we should reject. 12384f83aa30SJ. Bruce Fields */ 1239fd39ca9aSNeilBrown static void 12401da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12411da177e4SLinus Torvalds int i; 12421da177e4SLinus Torvalds 12431da177e4SLinus Torvalds *access = 0; 12441da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12451da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12461da177e4SLinus Torvalds *access |= i; 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 1250fd39ca9aSNeilBrown static void 12511da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12521da177e4SLinus Torvalds int i; 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds *deny = 0; 12551da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12561da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12571da177e4SLinus Torvalds *deny |= i ; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds static int 12621da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12631da177e4SLinus Torvalds unsigned int access, deny; 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12661da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12671da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12681da177e4SLinus Torvalds return 0; 12691da177e4SLinus Torvalds return 1; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds /* 12731da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12741da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12751da177e4SLinus Torvalds */ 1276b37ad28bSAl Viro static __be32 12771da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12781da177e4SLinus Torvalds { 12791da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12801da177e4SLinus Torvalds struct nfs4_file *fp; 12811da177e4SLinus Torvalds struct nfs4_stateid *stp; 1282b37ad28bSAl Viro __be32 ret; 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds fp = find_file(ino); 128713cd2184SNeilBrown if (!fp) 128813cd2184SNeilBrown return nfs_ok; 1289b700949bSNeilBrown ret = nfserr_locked; 12901da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12918beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12921da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12931da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 129413cd2184SNeilBrown goto out; 12951da177e4SLinus Torvalds } 129613cd2184SNeilBrown ret = nfs_ok; 129713cd2184SNeilBrown out: 129813cd2184SNeilBrown put_nfs4_file(fp); 129913cd2184SNeilBrown return ret; 13001da177e4SLinus Torvalds } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds static inline void 13031da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13041da177e4SLinus Torvalds { 13051da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1306aceaf78dSDave Hansen drop_file_write_access(filp); 13071da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds /* 13121da177e4SLinus Torvalds * Recall a delegation 13131da177e4SLinus Torvalds */ 13141da177e4SLinus Torvalds static int 13151da177e4SLinus Torvalds do_recall(void *__dp) 13161da177e4SLinus Torvalds { 13171da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13181da177e4SLinus Torvalds 131947f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 13201da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13211da177e4SLinus Torvalds return 0; 13221da177e4SLinus Torvalds } 13231da177e4SLinus Torvalds 13241da177e4SLinus Torvalds /* 13251da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13261da177e4SLinus Torvalds * by the lease (file_lock) 13271da177e4SLinus Torvalds * 13281da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13291da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13301da177e4SLinus Torvalds * lease. 13311da177e4SLinus Torvalds */ 13321da177e4SLinus Torvalds static 13331da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13341da177e4SLinus Torvalds { 13351da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13361da177e4SLinus Torvalds struct task_struct *t; 13371da177e4SLinus Torvalds 13381da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13391da177e4SLinus Torvalds if (!dp) 13401da177e4SLinus Torvalds return; 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13431da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13441da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13451da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13461da177e4SLinus Torvalds * it's safe to take a reference: */ 13471da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1348cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds spin_lock(&recall_lock); 13511da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13521da177e4SLinus Torvalds spin_unlock(&recall_lock); 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13551da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13561da177e4SLinus Torvalds 13570272e1fdSJ. Bruce Fields /* 13580272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13590272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13600272e1fdSJ. Bruce Fields * in time. 13610272e1fdSJ. Bruce Fields */ 13620272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13651da177e4SLinus Torvalds if (IS_ERR(t)) { 13661da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13691da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13701da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1371cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13721da177e4SLinus Torvalds nfs4_put_delegation(dp); 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds /* 13771da177e4SLinus Torvalds * The file_lock is being reapd. 13781da177e4SLinus Torvalds * 13791da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13801da177e4SLinus Torvalds */ 13811da177e4SLinus Torvalds static 13821da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13891da177e4SLinus Torvalds return; 13901da177e4SLinus Torvalds dp->dl_flock = NULL; 13911da177e4SLinus Torvalds } 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds /* 13941da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13951da177e4SLinus Torvalds * 1396a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 13971da177e4SLinus Torvalds */ 13981da177e4SLinus Torvalds static 13991da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 14001da177e4SLinus Torvalds { 14011da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14021da177e4SLinus Torvalds 14031da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14041da177e4SLinus Torvalds if (!dp) 14051da177e4SLinus Torvalds return; 14061da177e4SLinus Torvalds dp->dl_flock = new; 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds /* 1410a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 14111da177e4SLinus Torvalds */ 14121da177e4SLinus Torvalds static 14131da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14141da177e4SLinus Torvalds { 14151da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14161da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14171da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14181da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14191da177e4SLinus Torvalds 14201da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14211da177e4SLinus Torvalds return 0; 14221da177e4SLinus Torvalds 14231da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14241da177e4SLinus Torvalds } 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds static 14281da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14291da177e4SLinus Torvalds { 14301da177e4SLinus Torvalds if (arg & F_UNLCK) 14311da177e4SLinus Torvalds return lease_modify(onlist, arg); 14321da177e4SLinus Torvalds else 14331da177e4SLinus Torvalds return -EAGAIN; 14341da177e4SLinus Torvalds } 14351da177e4SLinus Torvalds 1436fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14371da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14381da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14391da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14401da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14411da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14421da177e4SLinus Torvalds }; 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds 1445b37ad28bSAl Viro __be32 14461da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14471da177e4SLinus Torvalds { 14481da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14491da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14501da177e4SLinus Torvalds unsigned int strhashval; 14511da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14540f442aa2SJ. Bruce Fields return nfserr_inval; 14551da177e4SLinus Torvalds 14561da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14571da177e4SLinus Torvalds return nfserr_stale_clientid; 14581da177e4SLinus Torvalds 14591da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14601da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14611da177e4SLinus Torvalds open->op_stateowner = sop; 14620f442aa2SJ. Bruce Fields if (!sop) { 14630f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14640f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14650f442aa2SJ. Bruce Fields if (clp == NULL) 14660f442aa2SJ. Bruce Fields return nfserr_expired; 14670f442aa2SJ. Bruce Fields goto renew; 14680f442aa2SJ. Bruce Fields } 1469ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14700f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1471ae8b6253SJ. Bruce Fields clp = sop->so_client; 1472f044ff83SJ. Bruce Fields release_openowner(sop); 14730f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1474ae8b6253SJ. Bruce Fields goto renew; 14750f442aa2SJ. Bruce Fields } 14760f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14771da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1478a90b061cSAl Viro return nfserr_replay_me; 14791da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14801da177e4SLinus Torvalds * that we don't even have replay data saved! 14811da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14821da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14831da177e4SLinus Torvalds * fail again for the same reason. 14841da177e4SLinus Torvalds */ 14850f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14861da177e4SLinus Torvalds goto renew; 14871da177e4SLinus Torvalds } 14880f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14890f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14900f442aa2SJ. Bruce Fields renew: 14910f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14921da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14931da177e4SLinus Torvalds if (sop == NULL) 14940f442aa2SJ. Bruce Fields return nfserr_resource; 14951da177e4SLinus Torvalds open->op_stateowner = sop; 14960f442aa2SJ. Bruce Fields } 14970f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14981da177e4SLinus Torvalds renew_client(sop->so_client); 14990f442aa2SJ. Bruce Fields return nfs_ok; 15001da177e4SLinus Torvalds } 15011da177e4SLinus Torvalds 1502b37ad28bSAl Viro static inline __be32 15034a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15044a6e43e6SNeilBrown { 15054a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15064a6e43e6SNeilBrown return nfserr_openmode; 15074a6e43e6SNeilBrown else 15084a6e43e6SNeilBrown return nfs_ok; 15094a6e43e6SNeilBrown } 15104a6e43e6SNeilBrown 151152f4fb43SNeilBrown static struct nfs4_delegation * 151252f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 151352f4fb43SNeilBrown { 151452f4fb43SNeilBrown struct nfs4_delegation *dp; 151552f4fb43SNeilBrown 1516ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 151752f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 151852f4fb43SNeilBrown return dp; 151952f4fb43SNeilBrown } 152052f4fb43SNeilBrown return NULL; 152152f4fb43SNeilBrown } 152252f4fb43SNeilBrown 1523b37ad28bSAl Viro static __be32 1524567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1525567d9829SNeilBrown struct nfs4_delegation **dp) 1526567d9829SNeilBrown { 1527567d9829SNeilBrown int flags; 1528b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1529567d9829SNeilBrown 1530567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1531567d9829SNeilBrown if (*dp == NULL) 1532c44c5eebSNeilBrown goto out; 1533567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1534567d9829SNeilBrown RD_STATE : WR_STATE; 1535567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1536567d9829SNeilBrown if (status) 1537567d9829SNeilBrown *dp = NULL; 1538c44c5eebSNeilBrown out: 1539c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1540c44c5eebSNeilBrown return nfs_ok; 1541c44c5eebSNeilBrown if (status) 1542c44c5eebSNeilBrown return status; 1543c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1544c44c5eebSNeilBrown return nfs_ok; 1545567d9829SNeilBrown } 1546567d9829SNeilBrown 1547b37ad28bSAl Viro static __be32 15481da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15491da177e4SLinus Torvalds { 15501da177e4SLinus Torvalds struct nfs4_stateid *local; 1551b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15521da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15531da177e4SLinus Torvalds 15548beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15551da177e4SLinus Torvalds /* ignore lock owners */ 15561da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15571da177e4SLinus Torvalds continue; 15581da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15591da177e4SLinus Torvalds if (local->st_stateowner == sop) 15601da177e4SLinus Torvalds *stpp = local; 15611da177e4SLinus Torvalds /* check for conflicting share reservations */ 15621da177e4SLinus Torvalds if (!test_share(local, open)) 15631da177e4SLinus Torvalds goto out; 15641da177e4SLinus Torvalds } 15651da177e4SLinus Torvalds status = 0; 15661da177e4SLinus Torvalds out: 15671da177e4SLinus Torvalds return status; 15681da177e4SLinus Torvalds } 15691da177e4SLinus Torvalds 15705ac049acSNeilBrown static inline struct nfs4_stateid * 15715ac049acSNeilBrown nfs4_alloc_stateid(void) 15725ac049acSNeilBrown { 15735ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15745ac049acSNeilBrown } 15755ac049acSNeilBrown 1576b37ad28bSAl Viro static __be32 15771da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1578567d9829SNeilBrown struct nfs4_delegation *dp, 15791da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15801da177e4SLinus Torvalds { 15811da177e4SLinus Torvalds struct nfs4_stateid *stp; 15821da177e4SLinus Torvalds 15835ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15841da177e4SLinus Torvalds if (stp == NULL) 15851da177e4SLinus Torvalds return nfserr_resource; 15861da177e4SLinus Torvalds 1587567d9829SNeilBrown if (dp) { 1588567d9829SNeilBrown get_file(dp->dl_vfs_file); 1589567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1590567d9829SNeilBrown } else { 1591b37ad28bSAl Viro __be32 status; 1592567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1593567d9829SNeilBrown &stp->st_vfs_file); 15941da177e4SLinus Torvalds if (status) { 15951da177e4SLinus Torvalds if (status == nfserr_dropit) 15961da177e4SLinus Torvalds status = nfserr_jukebox; 15975ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15981da177e4SLinus Torvalds return status; 15991da177e4SLinus Torvalds } 1600567d9829SNeilBrown } 16011da177e4SLinus Torvalds *stpp = stp; 16021da177e4SLinus Torvalds return 0; 16031da177e4SLinus Torvalds } 16041da177e4SLinus Torvalds 1605b37ad28bSAl Viro static inline __be32 16061da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16071da177e4SLinus Torvalds struct nfsd4_open *open) 16081da177e4SLinus Torvalds { 16091da177e4SLinus Torvalds struct iattr iattr = { 16101da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16111da177e4SLinus Torvalds .ia_size = 0, 16121da177e4SLinus Torvalds }; 16131da177e4SLinus Torvalds if (!open->op_truncate) 16141da177e4SLinus Torvalds return 0; 16151da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16169246585aSAl Viro return nfserr_inval; 16171da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16181da177e4SLinus Torvalds } 16191da177e4SLinus Torvalds 1620b37ad28bSAl Viro static __be32 16211da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16221da177e4SLinus Torvalds { 16231da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16247eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 16256c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1626b37ad28bSAl Viro __be32 status; 16271da177e4SLinus Torvalds 16281da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16296c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16306c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16311da177e4SLinus Torvalds 16326c26d08fSJ. Bruce Fields if (new_writer) { 1633b37ad28bSAl Viro int err = get_write_access(inode); 1634b37ad28bSAl Viro if (err) 1635b37ad28bSAl Viro return nfserrno(err); 1636e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 1637e518f056SBenny Halevy if (err) 1638e518f056SBenny Halevy return nfserrno(err); 1639e518f056SBenny Halevy file_take_write(filp); 16406c26d08fSJ. Bruce Fields } 16411da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16421da177e4SLinus Torvalds if (status) { 16436c26d08fSJ. Bruce Fields if (new_writer) 16441da177e4SLinus Torvalds put_write_access(inode); 16451da177e4SLinus Torvalds return status; 16461da177e4SLinus Torvalds } 16471da177e4SLinus Torvalds /* remember the open */ 16486c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 1649b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 1650b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16511da177e4SLinus Torvalds 16521da177e4SLinus Torvalds return nfs_ok; 16531da177e4SLinus Torvalds } 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds 16561da177e4SLinus Torvalds static void 165737515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16581da177e4SLinus Torvalds { 16591da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1660c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16611da177e4SLinus Torvalds } 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds /* 16641da177e4SLinus Torvalds * Attempt to hand out a delegation. 16651da177e4SLinus Torvalds */ 16661da177e4SLinus Torvalds static void 16671da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16681da177e4SLinus Torvalds { 16691da177e4SLinus Torvalds struct nfs4_delegation *dp; 16701da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16711da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16721da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16731da177e4SLinus Torvalds int status, flag = 0; 16741da177e4SLinus Torvalds 16751da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16767b190fecSNeilBrown open->op_recall = 0; 16777b190fecSNeilBrown switch (open->op_claim_type) { 16787b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16797b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16807b190fecSNeilBrown open->op_recall = 1; 16817b190fecSNeilBrown flag = open->op_delegate_type; 16827b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16831da177e4SLinus Torvalds goto out; 16847b190fecSNeilBrown break; 16857b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16867b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16877b190fecSNeilBrown * had the chance to reclaim theirs.... */ 1688af558e33SJ. Bruce Fields if (locks_in_grace()) 16897b190fecSNeilBrown goto out; 16907b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16917b190fecSNeilBrown goto out; 16921da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16931da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16941da177e4SLinus Torvalds else 16951da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16967b190fecSNeilBrown break; 16977b190fecSNeilBrown default: 16987b190fecSNeilBrown goto out; 16997b190fecSNeilBrown } 17001da177e4SLinus Torvalds 17011da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 17021da177e4SLinus Torvalds if (dp == NULL) { 17031da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17041da177e4SLinus Torvalds goto out; 17051da177e4SLinus Torvalds } 17061da177e4SLinus Torvalds locks_init_lock(&fl); 17071da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17081da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17099167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 17101da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17111da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17121da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17131da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17141da177e4SLinus Torvalds 1715a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 17161da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17171da177e4SLinus Torvalds */ 17189167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 17191da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1720c907132dSNeilBrown unhash_delegation(dp); 17211da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17221da177e4SLinus Torvalds goto out; 17231da177e4SLinus Torvalds } 17241da177e4SLinus Torvalds 17251da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17261da177e4SLinus Torvalds 17271da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17281da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17291da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17301da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17311da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17321da177e4SLinus Torvalds out: 17337b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17347b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17357b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17362fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 17371da177e4SLinus Torvalds open->op_delegate_type = flag; 17381da177e4SLinus Torvalds } 17391da177e4SLinus Torvalds 17401da177e4SLinus Torvalds /* 17411da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17421da177e4SLinus Torvalds */ 1743b37ad28bSAl Viro __be32 17441da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17451da177e4SLinus Torvalds { 17461da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17471da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17481da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1749567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1750b37ad28bSAl Viro __be32 status; 17511da177e4SLinus Torvalds 17521da177e4SLinus Torvalds status = nfserr_inval; 1753ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1754ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17551da177e4SLinus Torvalds goto out; 17561da177e4SLinus Torvalds /* 17571da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17581da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17591da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17601da177e4SLinus Torvalds */ 17611da177e4SLinus Torvalds fp = find_file(ino); 17621da177e4SLinus Torvalds if (fp) { 17631da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17641da177e4SLinus Torvalds goto out; 1765c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1766c44c5eebSNeilBrown if (status) 1767c44c5eebSNeilBrown goto out; 17681da177e4SLinus Torvalds } else { 1769c44c5eebSNeilBrown status = nfserr_bad_stateid; 1770c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1771c44c5eebSNeilBrown goto out; 17721da177e4SLinus Torvalds status = nfserr_resource; 17731da177e4SLinus Torvalds fp = alloc_init_file(ino); 17741da177e4SLinus Torvalds if (fp == NULL) 17751da177e4SLinus Torvalds goto out; 17761da177e4SLinus Torvalds } 17771da177e4SLinus Torvalds 17781da177e4SLinus Torvalds /* 17791da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17801da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17811da177e4SLinus Torvalds */ 17821da177e4SLinus Torvalds if (stp) { 17831da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17841da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17851da177e4SLinus Torvalds if (status) 17861da177e4SLinus Torvalds goto out; 1787444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17881da177e4SLinus Torvalds } else { 17891da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17901da177e4SLinus Torvalds int flags = 0; 17919ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17928837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 17931da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17948837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 1795567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1796567d9829SNeilBrown if (status) 17971da177e4SLinus Torvalds goto out; 17981da177e4SLinus Torvalds init_stateid(stp, fp, open); 17991da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 18001da177e4SLinus Torvalds if (status) { 18012283963fSJ. Bruce Fields release_open_stateid(stp); 18021da177e4SLinus Torvalds goto out; 18031da177e4SLinus Torvalds } 18041da177e4SLinus Torvalds } 18051da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds /* 18081da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18091da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18101da177e4SLinus Torvalds */ 18111da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds status = nfs_ok; 18141da177e4SLinus Torvalds 18151da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18161da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18171da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18181da177e4SLinus Torvalds out: 181913cd2184SNeilBrown if (fp) 182013cd2184SNeilBrown put_nfs4_file(fp); 182137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 182237515177SNeilBrown nfs4_set_claim_prev(open); 18231da177e4SLinus Torvalds /* 18241da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18251da177e4SLinus Torvalds */ 18261da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18271da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18281da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18291da177e4SLinus Torvalds 18301da177e4SLinus Torvalds return status; 18311da177e4SLinus Torvalds } 18321da177e4SLinus Torvalds 1833b37ad28bSAl Viro __be32 1834b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1835b591480bSJ.Bruce Fields clientid_t *clid) 18361da177e4SLinus Torvalds { 18371da177e4SLinus Torvalds struct nfs4_client *clp; 1838b37ad28bSAl Viro __be32 status; 18391da177e4SLinus Torvalds 18401da177e4SLinus Torvalds nfs4_lock_state(); 18411da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18421da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18431da177e4SLinus Torvalds status = nfserr_stale_clientid; 18441da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18451da177e4SLinus Torvalds goto out; 18461da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18471da177e4SLinus Torvalds status = nfserr_expired; 18481da177e4SLinus Torvalds if (clp == NULL) { 18491da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18501da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18511da177e4SLinus Torvalds goto out; 18521da177e4SLinus Torvalds } 18531da177e4SLinus Torvalds renew_client(clp); 18541da177e4SLinus Torvalds status = nfserr_cb_path_down; 1855ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18561da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18571da177e4SLinus Torvalds goto out; 18581da177e4SLinus Torvalds status = nfs_ok; 18591da177e4SLinus Torvalds out: 18601da177e4SLinus Torvalds nfs4_unlock_state(); 18611da177e4SLinus Torvalds return status; 18621da177e4SLinus Torvalds } 18631da177e4SLinus Torvalds 1864af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 1865af558e33SJ. Bruce Fields }; 1866af558e33SJ. Bruce Fields 1867a76b4319SNeilBrown static void 1868af558e33SJ. Bruce Fields nfsd4_end_grace(void) 1869a76b4319SNeilBrown { 1870a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1871c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1872af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 1873a76b4319SNeilBrown } 1874a76b4319SNeilBrown 1875fd39ca9aSNeilBrown static time_t 18761da177e4SLinus Torvalds nfs4_laundromat(void) 18771da177e4SLinus Torvalds { 18781da177e4SLinus Torvalds struct nfs4_client *clp; 18791da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18801da177e4SLinus Torvalds struct nfs4_delegation *dp; 18811da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18821da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18831da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18841da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds nfs4_lock_state(); 18871da177e4SLinus Torvalds 18881da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1889af558e33SJ. Bruce Fields if (locks_in_grace()) 1890af558e33SJ. Bruce Fields nfsd4_end_grace(); 18911da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18921da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18931da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18941da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18951da177e4SLinus Torvalds if (clientid_val > t) 18961da177e4SLinus Torvalds clientid_val = t; 18971da177e4SLinus Torvalds break; 18981da177e4SLinus Torvalds } 18991da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 19001da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1901c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 19021da177e4SLinus Torvalds expire_client(clp); 19031da177e4SLinus Torvalds } 19041da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19051da177e4SLinus Torvalds spin_lock(&recall_lock); 19061da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19071da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19081da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19091da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19101da177e4SLinus Torvalds if (test_val > u) 19111da177e4SLinus Torvalds test_val = u; 19121da177e4SLinus Torvalds break; 19131da177e4SLinus Torvalds } 19141da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19151da177e4SLinus Torvalds dp, dp->dl_flock); 19161da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19171da177e4SLinus Torvalds } 19181da177e4SLinus Torvalds spin_unlock(&recall_lock); 19191da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19201da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19211da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19221da177e4SLinus Torvalds unhash_delegation(dp); 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19251da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19261da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19271da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19281da177e4SLinus Torvalds u = sop->so_time - cutoff; 19291da177e4SLinus Torvalds if (test_val > u) 19301da177e4SLinus Torvalds test_val = u; 19311da177e4SLinus Torvalds break; 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19341da177e4SLinus Torvalds sop->so_id); 1935f044ff83SJ. Bruce Fields release_openowner(sop); 19361da177e4SLinus Torvalds } 19371da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19381da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19391da177e4SLinus Torvalds nfs4_unlock_state(); 19401da177e4SLinus Torvalds return clientid_val; 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds 1943a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 1944a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 1945a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 1946a254b246SHarvey Harrison 1947a254b246SHarvey Harrison static void 1948c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19491da177e4SLinus Torvalds { 19501da177e4SLinus Torvalds time_t t; 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds t = nfs4_laundromat(); 19531da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 195458da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19551da177e4SLinus Torvalds } 19561da177e4SLinus Torvalds 1957fd39ca9aSNeilBrown static struct nfs4_stateowner * 1958f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1959f8816512SNeilBrown { 19601da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19631da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19641da177e4SLinus Torvalds if (local->so_id == st_id) 19651da177e4SLinus Torvalds return local; 19661da177e4SLinus Torvalds } 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds return NULL; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds static inline int 19721da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19731da177e4SLinus Torvalds { 19747eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19751da177e4SLinus Torvalds } 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds static int 19781da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19791da177e4SLinus Torvalds { 19801da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19811da177e4SLinus Torvalds return 0; 1982849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19831da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19841da177e4SLinus Torvalds stateid->si_generation); 19851da177e4SLinus Torvalds return 1; 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds 19881da177e4SLinus Torvalds static inline int 19891da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19901da177e4SLinus Torvalds { 19911da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19921da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19931da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19941da177e4SLinus Torvalds } 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds static inline int 19971da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19981da177e4SLinus Torvalds { 19991da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 20001da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds 20031da177e4SLinus Torvalds static 2004b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 20051da177e4SLinus Torvalds { 2006b37ad28bSAl Viro __be32 status = nfserr_openmode; 20071da177e4SLinus Torvalds 20081da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20091da177e4SLinus Torvalds goto out; 20101da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20111da177e4SLinus Torvalds goto out; 20121da177e4SLinus Torvalds status = nfs_ok; 20131da177e4SLinus Torvalds out: 20141da177e4SLinus Torvalds return status; 20151da177e4SLinus Torvalds } 20161da177e4SLinus Torvalds 2017b37ad28bSAl Viro static inline __be32 20181da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20191da177e4SLinus Torvalds { 2020203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20211da177e4SLinus Torvalds return nfs_ok; 2022af558e33SJ. Bruce Fields else if (locks_in_grace()) { 20231da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20241da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20251da177e4SLinus Torvalds return nfserr_grace; 20261da177e4SLinus Torvalds } else if (flags & WR_STATE) 20271da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20281da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20291da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20301da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20311da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20321da177e4SLinus Torvalds } 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds /* 20351da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20361da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20371da177e4SLinus Torvalds */ 20381da177e4SLinus Torvalds static inline int 203918f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 20401da177e4SLinus Torvalds { 2041203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 20421da177e4SLinus Torvalds } 20431da177e4SLinus Torvalds 20440836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 20450836f587SJ. Bruce Fields { 20460836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 20470836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 20480836f587SJ. Bruce Fields return nfserr_bad_stateid; 20490836f587SJ. Bruce Fields /* 20500836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 20510836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 20520836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 20530836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 20540836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 20550836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 20560836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 20570836f587SJ. Bruce Fields * will just have to retry the IO: 20580836f587SJ. Bruce Fields */ 20590836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 20600836f587SJ. Bruce Fields return nfserr_old_stateid; 20610836f587SJ. Bruce Fields return nfs_ok; 20620836f587SJ. Bruce Fields } 20630836f587SJ. Bruce Fields 20643e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 20653e633079SJ. Bruce Fields { 20663e633079SJ. Bruce Fields return stateid->si_fileid == 0; 20673e633079SJ. Bruce Fields } 20683e633079SJ. Bruce Fields 20691da177e4SLinus Torvalds /* 20701da177e4SLinus Torvalds * Checks for stateid operations 20711da177e4SLinus Torvalds */ 2072b37ad28bSAl Viro __be32 20731da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20741da177e4SLinus Torvalds { 20751da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20761da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20771da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2078b37ad28bSAl Viro __be32 status; 20791da177e4SLinus Torvalds 20801da177e4SLinus Torvalds if (filpp) 20811da177e4SLinus Torvalds *filpp = NULL; 20821da177e4SLinus Torvalds 208318f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 20841da177e4SLinus Torvalds return nfserr_grace; 20851da177e4SLinus Torvalds 20861da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20871da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20881da177e4SLinus Torvalds 20891da177e4SLinus Torvalds status = nfserr_stale_stateid; 20901da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20911da177e4SLinus Torvalds goto out; 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds status = nfserr_bad_stateid; 20943e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2095a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 2096819a8f53SJ. Bruce Fields if (!dp) 20971da177e4SLinus Torvalds goto out; 2098fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 20990c2a498fSJ. Bruce Fields if (status) 21000c2a498fSJ. Bruce Fields goto out; 2101dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2102dc9bf700SJ. Bruce Fields if (status) 2103dc9bf700SJ. Bruce Fields goto out; 2104dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2105dc9bf700SJ. Bruce Fields if (filpp) 2106dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 21071da177e4SLinus Torvalds } else { /* open or lock stateid */ 2108a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 2109819a8f53SJ. Bruce Fields if (!stp) 21101da177e4SLinus Torvalds goto out; 21116150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 21121da177e4SLinus Torvalds goto out; 21131da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 21141da177e4SLinus Torvalds goto out; 2115fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 21160836f587SJ. Bruce Fields if (status) 21171da177e4SLinus Torvalds goto out; 2118a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2119a4455be0SJ. Bruce Fields if (status) 21201da177e4SLinus Torvalds goto out; 21211da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21221da177e4SLinus Torvalds if (filpp) 21231da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21241da177e4SLinus Torvalds } 21251da177e4SLinus Torvalds status = nfs_ok; 21261da177e4SLinus Torvalds out: 21271da177e4SLinus Torvalds return status; 21281da177e4SLinus Torvalds } 21291da177e4SLinus Torvalds 21304c4cd222SNeilBrown static inline int 21314c4cd222SNeilBrown setlkflg (int type) 21324c4cd222SNeilBrown { 21334c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21344c4cd222SNeilBrown RD_STATE : WR_STATE; 21354c4cd222SNeilBrown } 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds /* 21381da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21391da177e4SLinus Torvalds */ 2140b37ad28bSAl Viro static __be32 21414c4cd222SNeilBrown 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) 21421da177e4SLinus Torvalds { 21431da177e4SLinus Torvalds struct nfs4_stateid *stp; 21441da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21450836f587SJ. Bruce Fields __be32 status; 21461da177e4SLinus Torvalds 21471da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21481da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21491da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21501da177e4SLinus Torvalds stateid->si_generation); 21511da177e4SLinus Torvalds 21521da177e4SLinus Torvalds *stpp = NULL; 21531da177e4SLinus Torvalds *sopp = NULL; 21541da177e4SLinus Torvalds 21551da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21562fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21573a4f98bbSNeilBrown return nfserr_bad_stateid; 21581da177e4SLinus Torvalds } 21591da177e4SLinus Torvalds 21601da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21613a4f98bbSNeilBrown return nfserr_stale_stateid; 21621da177e4SLinus Torvalds /* 21631da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21641da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21651da177e4SLinus Torvalds * number is incorrect. 21661da177e4SLinus Torvalds */ 2167f8816512SNeilBrown stp = find_stateid(stateid, flags); 2168f8816512SNeilBrown if (stp == NULL) { 2169f8816512SNeilBrown /* 2170f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2171f8816512SNeilBrown * a replayed close: 2172f8816512SNeilBrown */ 2173f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2174f8816512SNeilBrown if (sop == NULL) 2175f8816512SNeilBrown return nfserr_bad_stateid; 2176f8816512SNeilBrown *sopp = sop; 2177f8816512SNeilBrown goto check_replay; 2178f8816512SNeilBrown } 21791da177e4SLinus Torvalds 218039325bd0SJ. Bruce Fields *stpp = stp; 218139325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 218239325bd0SJ. Bruce Fields 21834c4cd222SNeilBrown if (lock) { 21844c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21851da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21864c4cd222SNeilBrown int lkflg = 0; 2187b37ad28bSAl Viro __be32 status; 21881da177e4SLinus Torvalds 21894c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21904c4cd222SNeilBrown 21914c4cd222SNeilBrown if (lock->lk_is_new) { 21921da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21933a4f98bbSNeilBrown return nfserr_bad_stateid; 2194599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 21953a4f98bbSNeilBrown return nfserr_bad_stateid; 21964c4cd222SNeilBrown /* stp is the open stateid */ 21974c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21984c4cd222SNeilBrown if (status) 21994c4cd222SNeilBrown return status; 22004c4cd222SNeilBrown } else { 22014c4cd222SNeilBrown /* stp is the lock stateid */ 22024c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 22034c4cd222SNeilBrown if (status) 22044c4cd222SNeilBrown return status; 22054c4cd222SNeilBrown } 22061da177e4SLinus Torvalds } 22071da177e4SLinus Torvalds 2208f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 22092fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 22103a4f98bbSNeilBrown return nfserr_bad_stateid; 22111da177e4SLinus Torvalds } 22121da177e4SLinus Torvalds 22131da177e4SLinus Torvalds /* 22141da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22151da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22161da177e4SLinus Torvalds * generation number wraparound. 22171da177e4SLinus Torvalds */ 2218bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22191da177e4SLinus Torvalds goto check_replay; 22201da177e4SLinus Torvalds 22213a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22222fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 22233a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22243a4f98bbSNeilBrown return nfserr_bad_stateid; 22251da177e4SLinus Torvalds } 22263a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22272fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 22283a4f98bbSNeilBrown " confirmed yet!\n"); 22293a4f98bbSNeilBrown return nfserr_bad_stateid; 22301da177e4SLinus Torvalds } 22310836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 22320836f587SJ. Bruce Fields if (status) 22330836f587SJ. Bruce Fields return status; 223452fd004eSNeilBrown renew_client(sop->so_client); 22353a4f98bbSNeilBrown return nfs_ok; 22361da177e4SLinus Torvalds 22371da177e4SLinus Torvalds check_replay: 2238bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2239849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22401da177e4SLinus Torvalds /* indicate replay to calling function */ 2241a90b061cSAl Viro return nfserr_replay_me; 22421da177e4SLinus Torvalds } 22432fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22443a4f98bbSNeilBrown sop->so_seqid, seqid); 22453a4f98bbSNeilBrown *sopp = NULL; 22463a4f98bbSNeilBrown return nfserr_bad_seqid; 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds 2249b37ad28bSAl Viro __be32 2250ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2251a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22521da177e4SLinus Torvalds { 2253b37ad28bSAl Viro __be32 status; 22541da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22551da177e4SLinus Torvalds struct nfs4_stateid *stp; 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2258ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2259ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22601da177e4SLinus Torvalds 2261ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2262a8cddc5dSJ. Bruce Fields if (status) 2263a8cddc5dSJ. Bruce Fields return status; 22641da177e4SLinus Torvalds 22651da177e4SLinus Torvalds nfs4_lock_state(); 22661da177e4SLinus Torvalds 2267ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2268ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2269f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 22701da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22711da177e4SLinus Torvalds goto out; 22721da177e4SLinus Torvalds 22731da177e4SLinus Torvalds sop = oc->oc_stateowner; 22741da177e4SLinus Torvalds sop->so_confirmed = 1; 22751da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22761da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22781da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22791da177e4SLinus Torvalds stp->st_stateid.si_boot, 22801da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22811da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22821da177e4SLinus Torvalds stp->st_stateid.si_generation); 2283c7b9a459SNeilBrown 2284c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22851da177e4SLinus Torvalds out: 2286f2327d9aSNeil Brown if (oc->oc_stateowner) { 22871da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2288a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2289f2327d9aSNeil Brown } 22901da177e4SLinus Torvalds nfs4_unlock_state(); 22911da177e4SLinus Torvalds return status; 22921da177e4SLinus Torvalds } 22931da177e4SLinus Torvalds 22941da177e4SLinus Torvalds 22951da177e4SLinus Torvalds /* 22961da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22971da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22981da177e4SLinus Torvalds */ 22991da177e4SLinus Torvalds static void 23001da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 23011da177e4SLinus Torvalds { 23021da177e4SLinus Torvalds int i; 23031da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 23041da177e4SLinus Torvalds if ((i & access) != i) 23051da177e4SLinus Torvalds __clear_bit(i, bmap); 23061da177e4SLinus Torvalds } 23071da177e4SLinus Torvalds } 23081da177e4SLinus Torvalds 23091da177e4SLinus Torvalds static void 23101da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23111da177e4SLinus Torvalds { 23121da177e4SLinus Torvalds int i; 23131da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23141da177e4SLinus Torvalds if ((i & deny) != i) 23151da177e4SLinus Torvalds __clear_bit(i, bmap); 23161da177e4SLinus Torvalds } 23171da177e4SLinus Torvalds } 23181da177e4SLinus Torvalds 2319b37ad28bSAl Viro __be32 2320ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2321ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2322a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 23231da177e4SLinus Torvalds { 2324b37ad28bSAl Viro __be32 status; 23251da177e4SLinus Torvalds struct nfs4_stateid *stp; 23261da177e4SLinus Torvalds unsigned int share_access; 23271da177e4SLinus Torvalds 23281da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2329ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2330ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23311da177e4SLinus Torvalds 2332ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2333ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23341da177e4SLinus Torvalds return nfserr_inval; 23351da177e4SLinus Torvalds 23361da177e4SLinus Torvalds nfs4_lock_state(); 2337ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2338ca364317SJ.Bruce Fields od->od_seqid, 23391da177e4SLinus Torvalds &od->od_stateid, 2340f3362737SJ. Bruce Fields OPEN_STATE, 23411da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23421da177e4SLinus Torvalds goto out; 23431da177e4SLinus Torvalds 23441da177e4SLinus Torvalds status = nfserr_inval; 23451da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23461da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23471da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23481da177e4SLinus Torvalds goto out; 23491da177e4SLinus Torvalds } 23501da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23511da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23521da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23531da177e4SLinus Torvalds goto out; 23541da177e4SLinus Torvalds } 23551da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23561da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23571da177e4SLinus Torvalds share_access & ~od->od_share_access); 23581da177e4SLinus Torvalds 23591da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23601da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23611da177e4SLinus Torvalds 23621da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23631da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23641da177e4SLinus Torvalds status = nfs_ok; 23651da177e4SLinus Torvalds out: 2366f2327d9aSNeil Brown if (od->od_stateowner) { 23671da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2368a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2369f2327d9aSNeil Brown } 23701da177e4SLinus Torvalds nfs4_unlock_state(); 23711da177e4SLinus Torvalds return status; 23721da177e4SLinus Torvalds } 23731da177e4SLinus Torvalds 23741da177e4SLinus Torvalds /* 23751da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23761da177e4SLinus Torvalds */ 2377b37ad28bSAl Viro __be32 2378ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2379a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23801da177e4SLinus Torvalds { 2381b37ad28bSAl Viro __be32 status; 23821da177e4SLinus Torvalds struct nfs4_stateid *stp; 23831da177e4SLinus Torvalds 23841da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2385ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2386ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23871da177e4SLinus Torvalds 23881da177e4SLinus Torvalds nfs4_lock_state(); 23891da177e4SLinus Torvalds /* check close_lru for replay */ 2390ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2391ca364317SJ.Bruce Fields close->cl_seqid, 23921da177e4SLinus Torvalds &close->cl_stateid, 2393f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 23941da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23951da177e4SLinus Torvalds goto out; 23961da177e4SLinus Torvalds status = nfs_ok; 23971da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23981da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23991da177e4SLinus Torvalds 240004ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 24012283963fSJ. Bruce Fields release_open_stateid(stp); 240204ef5954SJ. Bruce Fields 240304ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 240404ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 240504ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 240604ef5954SJ. Bruce Fields */ 240704ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 240804ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 24091da177e4SLinus Torvalds out: 2410f2327d9aSNeil Brown if (close->cl_stateowner) { 24111da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2412a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2413f2327d9aSNeil Brown } 24141da177e4SLinus Torvalds nfs4_unlock_state(); 24151da177e4SLinus Torvalds return status; 24161da177e4SLinus Torvalds } 24171da177e4SLinus Torvalds 2418b37ad28bSAl Viro __be32 2419ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2420ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 24211da177e4SLinus Torvalds { 2422203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 2423203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 2424203a8c8eSJ. Bruce Fields struct inode *inode; 2425b37ad28bSAl Viro __be32 status; 24261da177e4SLinus Torvalds 2427ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 2428203a8c8eSJ. Bruce Fields return status; 2429203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds nfs4_lock_state(); 2432203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 2433203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 2434203a8c8eSJ. Bruce Fields goto out; 2435203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 2436203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 2437203a8c8eSJ. Bruce Fields goto out; 24387e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 2439203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 2440203a8c8eSJ. Bruce Fields goto out; 2441203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 2442203a8c8eSJ. Bruce Fields if (!dp) 2443203a8c8eSJ. Bruce Fields goto out; 2444203a8c8eSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 2445203a8c8eSJ. Bruce Fields if (status) 2446203a8c8eSJ. Bruce Fields goto out; 2447203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 2448203a8c8eSJ. Bruce Fields 2449203a8c8eSJ. Bruce Fields unhash_delegation(dp); 24501da177e4SLinus Torvalds out: 2451203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 2452203a8c8eSJ. Bruce Fields 24531da177e4SLinus Torvalds return status; 24541da177e4SLinus Torvalds } 24551da177e4SLinus Torvalds 24561da177e4SLinus Torvalds 24571da177e4SLinus Torvalds /* 24581da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24591da177e4SLinus Torvalds */ 24601da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24611da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24621da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24631da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24641da177e4SLinus Torvalds 246587df4de8SBenny Halevy static inline u64 246687df4de8SBenny Halevy end_offset(u64 start, u64 len) 246787df4de8SBenny Halevy { 246887df4de8SBenny Halevy u64 end; 246987df4de8SBenny Halevy 247087df4de8SBenny Halevy end = start + len; 247187df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 247287df4de8SBenny Halevy } 247387df4de8SBenny Halevy 247487df4de8SBenny Halevy /* last octet in a range */ 247587df4de8SBenny Halevy static inline u64 247687df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 247787df4de8SBenny Halevy { 247887df4de8SBenny Halevy u64 end; 247987df4de8SBenny Halevy 248087df4de8SBenny Halevy BUG_ON(!len); 248187df4de8SBenny Halevy end = start + len; 248287df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 248387df4de8SBenny Halevy } 248487df4de8SBenny Halevy 24851da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24861da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24871da177e4SLinus Torvalds 24881da177e4SLinus Torvalds static inline unsigned int 24891da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24901da177e4SLinus Torvalds struct xdr_netobj *ownername) 24911da177e4SLinus Torvalds { 24921da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24931da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24941da177e4SLinus Torvalds & LOCK_HASH_MASK; 24951da177e4SLinus Torvalds } 24961da177e4SLinus Torvalds 24971da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24981da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24991da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 25001da177e4SLinus Torvalds 2501fd39ca9aSNeilBrown static struct nfs4_stateid * 25021da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 25031da177e4SLinus Torvalds { 25049346eff0SKrishna Kumar struct nfs4_stateid *local; 25051da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 25061da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 25071da177e4SLinus Torvalds unsigned int hashval; 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 25109346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 25111da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 25121da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 25131da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 25141da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 25151da177e4SLinus Torvalds return local; 25161da177e4SLinus Torvalds } 25171da177e4SLinus Torvalds } 25189346eff0SKrishna Kumar 25199346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 25201da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 25211da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 25221da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 25231da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 25241da177e4SLinus Torvalds return local; 25251da177e4SLinus Torvalds } 2526849823c5SNeil Brown } 25271da177e4SLinus Torvalds return NULL; 25281da177e4SLinus Torvalds } 25291da177e4SLinus Torvalds 25301da177e4SLinus Torvalds static struct nfs4_delegation * 25311da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 25321da177e4SLinus Torvalds { 253313cd2184SNeilBrown struct nfs4_file *fp; 253413cd2184SNeilBrown struct nfs4_delegation *dl; 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 25371da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 25381da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 25391da177e4SLinus Torvalds 25401da177e4SLinus Torvalds fp = find_file(ino); 254113cd2184SNeilBrown if (!fp) 25421da177e4SLinus Torvalds return NULL; 254313cd2184SNeilBrown dl = find_delegation_file(fp, stid); 254413cd2184SNeilBrown put_nfs4_file(fp); 254513cd2184SNeilBrown return dl; 25461da177e4SLinus Torvalds } 25471da177e4SLinus Torvalds 25481da177e4SLinus Torvalds /* 25491da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 25501da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25511da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25521da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25531da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25541da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25551da177e4SLinus Torvalds */ 25561da177e4SLinus Torvalds static inline void 25571da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25581da177e4SLinus Torvalds { 25591da177e4SLinus Torvalds if (lock->fl_start < 0) 25601da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25611da177e4SLinus Torvalds if (lock->fl_end < 0) 25621da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25631da177e4SLinus Torvalds } 25641da177e4SLinus Torvalds 2565d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2566d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2567e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2568d5b9026aSNeilBrown }; 25691da177e4SLinus Torvalds 25701da177e4SLinus Torvalds static inline void 25711da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25721da177e4SLinus Torvalds { 2573d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2574d5b9026aSNeilBrown unsigned int hval; 25751da177e4SLinus Torvalds 2576d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2577d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2578d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25791da177e4SLinus Torvalds kref_get(&sop->so_ref); 25801da177e4SLinus Torvalds deny->ld_sop = sop; 25811da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2582d5b9026aSNeilBrown } else { 2583d5b9026aSNeilBrown deny->ld_sop = NULL; 2584d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2585d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25861da177e4SLinus Torvalds } 25871da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 258887df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 258987df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 25901da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25911da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25921da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25931da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25941da177e4SLinus Torvalds } 25951da177e4SLinus Torvalds 25961da177e4SLinus Torvalds static struct nfs4_stateowner * 25971da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25981da177e4SLinus Torvalds struct xdr_netobj *owner) 25991da177e4SLinus Torvalds { 26001da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 26011da177e4SLinus Torvalds struct nfs4_stateowner *op; 26021da177e4SLinus Torvalds 26031da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2604599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 26051da177e4SLinus Torvalds return op; 26061da177e4SLinus Torvalds } 26071da177e4SLinus Torvalds return NULL; 26081da177e4SLinus Torvalds } 26091da177e4SLinus Torvalds 26101da177e4SLinus Torvalds /* 26111da177e4SLinus Torvalds * Alloc a lock owner structure. 26121da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 26131da177e4SLinus Torvalds * occured. 26141da177e4SLinus Torvalds * 26151da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 26161da177e4SLinus Torvalds */ 26171da177e4SLinus Torvalds 26181da177e4SLinus Torvalds static struct nfs4_stateowner * 26191da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 26201da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26211da177e4SLinus Torvalds struct nfs4_replay *rp; 26221da177e4SLinus Torvalds unsigned int idhashval; 26231da177e4SLinus Torvalds 26241da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 26251da177e4SLinus Torvalds return NULL; 26261da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 26271da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 26281da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 26291da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2630ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2631ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 26321da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 26331da177e4SLinus Torvalds sop->so_time = 0; 26341da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 26351da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2636ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 26371da177e4SLinus Torvalds sop->so_is_open_owner = 0; 26381da177e4SLinus Torvalds sop->so_id = current_ownerid++; 26391da177e4SLinus Torvalds sop->so_client = clp; 2640b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2641b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2642b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 26431da177e4SLinus Torvalds sop->so_confirmed = 1; 26441da177e4SLinus Torvalds rp = &sop->so_replay; 2645de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 26461da177e4SLinus Torvalds rp->rp_buflen = 0; 26471da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 26481da177e4SLinus Torvalds return sop; 26491da177e4SLinus Torvalds } 26501da177e4SLinus Torvalds 2651fd39ca9aSNeilBrown static struct nfs4_stateid * 26521da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26531da177e4SLinus Torvalds { 26541da177e4SLinus Torvalds struct nfs4_stateid *stp; 26551da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26561da177e4SLinus Torvalds 26575ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26585ac049acSNeilBrown if (stp == NULL) 26591da177e4SLinus Torvalds goto out; 26601da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26611da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2662ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2663ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26641da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26658beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2666ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26671da177e4SLinus Torvalds stp->st_stateowner = sop; 266813cd2184SNeilBrown get_nfs4_file(fp); 26691da177e4SLinus Torvalds stp->st_file = fp; 26701da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26711da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26721da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26731da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26741da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26751da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26761da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26774c4cd222SNeilBrown stp->st_openstp = open_stp; 26781da177e4SLinus Torvalds 26791da177e4SLinus Torvalds out: 26801da177e4SLinus Torvalds return stp; 26811da177e4SLinus Torvalds } 26821da177e4SLinus Torvalds 2683fd39ca9aSNeilBrown static int 26841da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26851da177e4SLinus Torvalds { 268687df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 26871da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26881da177e4SLinus Torvalds } 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds /* 26911da177e4SLinus Torvalds * LOCK operation 26921da177e4SLinus Torvalds */ 2693b37ad28bSAl Viro __be32 2694ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2695a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26961da177e4SLinus Torvalds { 26973e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2698b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26991da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 27001da177e4SLinus Torvalds struct file *filp; 27011da177e4SLinus Torvalds struct file_lock file_lock; 27028dc7c311SAndy Adamson struct file_lock conflock; 2703b37ad28bSAl Viro __be32 status = 0; 27041da177e4SLinus Torvalds unsigned int strhashval; 2705150b3934SMarc Eshel unsigned int cmd; 2706b8dd7b9aSAl Viro int err; 27071da177e4SLinus Torvalds 27081da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 27091da177e4SLinus Torvalds (long long) lock->lk_offset, 27101da177e4SLinus Torvalds (long long) lock->lk_length); 27111da177e4SLinus Torvalds 27121da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 27131da177e4SLinus Torvalds return nfserr_inval; 27141da177e4SLinus Torvalds 2715ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 27168837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 2717a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2718a6f6ef2fSAndy Adamson return status; 2719a6f6ef2fSAndy Adamson } 2720a6f6ef2fSAndy Adamson 27211da177e4SLinus Torvalds nfs4_lock_state(); 27221da177e4SLinus Torvalds 27231da177e4SLinus Torvalds if (lock->lk_is_new) { 27241da177e4SLinus Torvalds /* 27251da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2726893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2727893f8770SNeilBrown * lock stateid. 27281da177e4SLinus Torvalds */ 27291da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 27301da177e4SLinus Torvalds struct nfs4_file *fp; 27311da177e4SLinus Torvalds 27321da177e4SLinus Torvalds status = nfserr_stale_clientid; 2733849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 27341da177e4SLinus Torvalds goto out; 27351da177e4SLinus Torvalds 27361da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2737ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27381da177e4SLinus Torvalds lock->lk_new_open_seqid, 27391da177e4SLinus Torvalds &lock->lk_new_open_stateid, 2740f3362737SJ. Bruce Fields OPEN_STATE, 27413a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2742b59e3c0eSNeil Brown lock); 274337515177SNeilBrown if (status) 27441da177e4SLinus Torvalds goto out; 27453a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 27461da177e4SLinus Torvalds /* create lockowner and lock stateid */ 27471da177e4SLinus Torvalds fp = open_stp->st_file; 27481da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 27491da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 27501da177e4SLinus Torvalds &lock->v.new.owner); 27513e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27523e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27533e9e3dbeSNeilBrown * create new stateids)? */ 27541da177e4SLinus Torvalds status = nfserr_resource; 2755b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2756b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2757b59e3c0eSNeil Brown if (lock_sop == NULL) 27581da177e4SLinus Torvalds goto out; 2759b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27608a280510SJ. Bruce Fields if (lock_stp == NULL) 27611da177e4SLinus Torvalds goto out; 27621da177e4SLinus Torvalds } else { 27631da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2764ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27651da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27661da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 2767f3362737SJ. Bruce Fields LOCK_STATE, 27683a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27691da177e4SLinus Torvalds if (status) 27701da177e4SLinus Torvalds goto out; 27713a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27721da177e4SLinus Torvalds } 27733a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27741da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27751da177e4SLinus Torvalds 27760dd395dcSNeilBrown status = nfserr_grace; 2777af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 27780dd395dcSNeilBrown goto out; 27790dd395dcSNeilBrown status = nfserr_no_grace; 2780af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 27810dd395dcSNeilBrown goto out; 27820dd395dcSNeilBrown 27831da177e4SLinus Torvalds locks_init_lock(&file_lock); 27841da177e4SLinus Torvalds switch (lock->lk_type) { 27851da177e4SLinus Torvalds case NFS4_READ_LT: 27861da177e4SLinus Torvalds case NFS4_READW_LT: 27871da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2788150b3934SMarc Eshel cmd = F_SETLK; 27891da177e4SLinus Torvalds break; 27901da177e4SLinus Torvalds case NFS4_WRITE_LT: 27911da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27921da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2793150b3934SMarc Eshel cmd = F_SETLK; 27941da177e4SLinus Torvalds break; 27951da177e4SLinus Torvalds default: 27961da177e4SLinus Torvalds status = nfserr_inval; 27971da177e4SLinus Torvalds goto out; 27981da177e4SLinus Torvalds } 2799b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 28001da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28011da177e4SLinus Torvalds file_lock.fl_file = filp; 28021da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2803d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28041da177e4SLinus Torvalds 28051da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 280687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 28071da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds /* 28101da177e4SLinus Torvalds * Try to lock the file in the VFS. 28111da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 28121da177e4SLinus Torvalds */ 28131da177e4SLinus Torvalds 2814fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2815b8dd7b9aSAl Viro switch (-err) { 28161da177e4SLinus Torvalds case 0: /* success! */ 28171da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 28181da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 28191da177e4SLinus Torvalds sizeof(stateid_t)); 2820b8dd7b9aSAl Viro status = 0; 2821eb76b3fdSAndy Adamson break; 2822eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2823eb76b3fdSAndy Adamson status = nfserr_denied; 2824eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2825eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2826eb76b3fdSAndy Adamson break; 28271da177e4SLinus Torvalds case (EDEADLK): 28281da177e4SLinus Torvalds status = nfserr_deadlock; 2829eb76b3fdSAndy Adamson break; 28301da177e4SLinus Torvalds default: 2831fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2832eb76b3fdSAndy Adamson status = nfserr_resource; 2833eb76b3fdSAndy Adamson break; 28341da177e4SLinus Torvalds } 28351da177e4SLinus Torvalds out: 28368a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 2837f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 28383a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 28393a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2840a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2841f2327d9aSNeil Brown } 28421da177e4SLinus Torvalds nfs4_unlock_state(); 28431da177e4SLinus Torvalds return status; 28441da177e4SLinus Torvalds } 28451da177e4SLinus Torvalds 28461da177e4SLinus Torvalds /* 284755ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 284855ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 284955ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 285055ef1274SJ. Bruce Fields * inode operation.) 285155ef1274SJ. Bruce Fields */ 285255ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 285355ef1274SJ. Bruce Fields { 285455ef1274SJ. Bruce Fields struct file *file; 285555ef1274SJ. Bruce Fields int err; 285655ef1274SJ. Bruce Fields 285755ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 285855ef1274SJ. Bruce Fields if (err) 285955ef1274SJ. Bruce Fields return err; 286055ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 286155ef1274SJ. Bruce Fields nfsd_close(file); 286255ef1274SJ. Bruce Fields return err; 286355ef1274SJ. Bruce Fields } 286455ef1274SJ. Bruce Fields 286555ef1274SJ. Bruce Fields /* 28661da177e4SLinus Torvalds * LOCKT operation 28671da177e4SLinus Torvalds */ 2868b37ad28bSAl Viro __be32 2869ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2870ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 28711da177e4SLinus Torvalds { 28721da177e4SLinus Torvalds struct inode *inode; 28731da177e4SLinus Torvalds struct file_lock file_lock; 2874fd85b817SMarc Eshel int error; 2875b37ad28bSAl Viro __be32 status; 28761da177e4SLinus Torvalds 2877af558e33SJ. Bruce Fields if (locks_in_grace()) 28781da177e4SLinus Torvalds return nfserr_grace; 28791da177e4SLinus Torvalds 28801da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28811da177e4SLinus Torvalds return nfserr_inval; 28821da177e4SLinus Torvalds 28831da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28841da177e4SLinus Torvalds nfs4_lock_state(); 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds status = nfserr_stale_clientid; 2887849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28881da177e4SLinus Torvalds goto out; 28891da177e4SLinus Torvalds 2890ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2891849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28921da177e4SLinus Torvalds if (status == nfserr_symlink) 28931da177e4SLinus Torvalds status = nfserr_inval; 28941da177e4SLinus Torvalds goto out; 28951da177e4SLinus Torvalds } 28961da177e4SLinus Torvalds 2897ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28981da177e4SLinus Torvalds locks_init_lock(&file_lock); 28991da177e4SLinus Torvalds switch (lockt->lt_type) { 29001da177e4SLinus Torvalds case NFS4_READ_LT: 29011da177e4SLinus Torvalds case NFS4_READW_LT: 29021da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 29031da177e4SLinus Torvalds break; 29041da177e4SLinus Torvalds case NFS4_WRITE_LT: 29051da177e4SLinus Torvalds case NFS4_WRITEW_LT: 29061da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 29071da177e4SLinus Torvalds break; 29081da177e4SLinus Torvalds default: 29092fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 29101da177e4SLinus Torvalds status = nfserr_inval; 29111da177e4SLinus Torvalds goto out; 29121da177e4SLinus Torvalds } 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 29151da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 29161da177e4SLinus Torvalds if (lockt->lt_stateowner) 29171da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 29181da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29191da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 292287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 29231da177e4SLinus Torvalds 29241da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds status = nfs_ok; 292755ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 2928fd85b817SMarc Eshel if (error) { 2929fd85b817SMarc Eshel status = nfserrno(error); 2930fd85b817SMarc Eshel goto out; 2931fd85b817SMarc Eshel } 29329d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 29331da177e4SLinus Torvalds status = nfserr_denied; 29349d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 29351da177e4SLinus Torvalds } 29361da177e4SLinus Torvalds out: 29371da177e4SLinus Torvalds nfs4_unlock_state(); 29381da177e4SLinus Torvalds return status; 29391da177e4SLinus Torvalds } 29401da177e4SLinus Torvalds 2941b37ad28bSAl Viro __be32 2942ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2943a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 29441da177e4SLinus Torvalds { 29451da177e4SLinus Torvalds struct nfs4_stateid *stp; 29461da177e4SLinus Torvalds struct file *filp = NULL; 29471da177e4SLinus Torvalds struct file_lock file_lock; 2948b37ad28bSAl Viro __be32 status; 2949b8dd7b9aSAl Viro int err; 29501da177e4SLinus Torvalds 29511da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29521da177e4SLinus Torvalds (long long) locku->lu_offset, 29531da177e4SLinus Torvalds (long long) locku->lu_length); 29541da177e4SLinus Torvalds 29551da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29561da177e4SLinus Torvalds return nfserr_inval; 29571da177e4SLinus Torvalds 29581da177e4SLinus Torvalds nfs4_lock_state(); 29591da177e4SLinus Torvalds 2960ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 29611da177e4SLinus Torvalds locku->lu_seqid, 29621da177e4SLinus Torvalds &locku->lu_stateid, 2963f3362737SJ. Bruce Fields LOCK_STATE, 29641da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29651da177e4SLinus Torvalds goto out; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds filp = stp->st_vfs_file; 29681da177e4SLinus Torvalds BUG_ON(!filp); 29691da177e4SLinus Torvalds locks_init_lock(&file_lock); 29701da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29711da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29721da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29731da177e4SLinus Torvalds file_lock.fl_file = filp; 29741da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2975d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29761da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29771da177e4SLinus Torvalds 297887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 29791da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29801da177e4SLinus Torvalds 29811da177e4SLinus Torvalds /* 29821da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29831da177e4SLinus Torvalds */ 2984fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2985b8dd7b9aSAl Viro if (err) { 2986fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29871da177e4SLinus Torvalds goto out_nfserr; 29881da177e4SLinus Torvalds } 29891da177e4SLinus Torvalds /* 29901da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29911da177e4SLinus Torvalds */ 29921da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29931da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29941da177e4SLinus Torvalds 29951da177e4SLinus Torvalds out: 2996f2327d9aSNeil Brown if (locku->lu_stateowner) { 29971da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2998a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2999f2327d9aSNeil Brown } 30001da177e4SLinus Torvalds nfs4_unlock_state(); 30011da177e4SLinus Torvalds return status; 30021da177e4SLinus Torvalds 30031da177e4SLinus Torvalds out_nfserr: 3004b8dd7b9aSAl Viro status = nfserrno(err); 30051da177e4SLinus Torvalds goto out; 30061da177e4SLinus Torvalds } 30071da177e4SLinus Torvalds 30081da177e4SLinus Torvalds /* 30091da177e4SLinus Torvalds * returns 30101da177e4SLinus Torvalds * 1: locks held by lockowner 30111da177e4SLinus Torvalds * 0: no locks held by lockowner 30121da177e4SLinus Torvalds */ 30131da177e4SLinus Torvalds static int 30141da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 30151da177e4SLinus Torvalds { 30161da177e4SLinus Torvalds struct file_lock **flpp; 30177eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 30181da177e4SLinus Torvalds int status = 0; 30191da177e4SLinus Torvalds 30201da177e4SLinus Torvalds lock_kernel(); 30211da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3022796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 30231da177e4SLinus Torvalds status = 1; 30241da177e4SLinus Torvalds goto out; 30251da177e4SLinus Torvalds } 3026796dadfdSJ. Bruce Fields } 30271da177e4SLinus Torvalds out: 30281da177e4SLinus Torvalds unlock_kernel(); 30291da177e4SLinus Torvalds return status; 30301da177e4SLinus Torvalds } 30311da177e4SLinus Torvalds 3032b37ad28bSAl Viro __be32 3033b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3034b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3035b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 30361da177e4SLinus Torvalds { 30371da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 30383e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 30393e9e3dbeSNeilBrown struct nfs4_stateid *stp; 30401da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 30413e9e3dbeSNeilBrown struct list_head matches; 30423e9e3dbeSNeilBrown int i; 3043b37ad28bSAl Viro __be32 status; 30441da177e4SLinus Torvalds 30451da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 30461da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30471da177e4SLinus Torvalds 30481da177e4SLinus Torvalds /* XXX check for lease expiration */ 30491da177e4SLinus Torvalds 30501da177e4SLinus Torvalds status = nfserr_stale_clientid; 3051849823c5SNeil Brown if (STALE_CLIENTID(clid)) 30521da177e4SLinus Torvalds return status; 30531da177e4SLinus Torvalds 30541da177e4SLinus Torvalds nfs4_lock_state(); 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds status = nfserr_locks_held; 30573e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30583e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30593e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30603e9e3dbeSNeilBrown * data structures. */ 30613e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30623e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30633e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3064599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 30653e9e3dbeSNeilBrown continue; 30663e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3067ea1da636SNeilBrown st_perstateowner) { 30683e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30691da177e4SLinus Torvalds goto out; 30703e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30713e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30723e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30731da177e4SLinus Torvalds } 30743e9e3dbeSNeilBrown } 30753e9e3dbeSNeilBrown } 30763e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30773e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30783e9e3dbeSNeilBrown * have been checked. */ 30791da177e4SLinus Torvalds status = nfs_ok; 30800fa822e4SNeilBrown while (!list_empty(&matches)) { 30810fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30820fa822e4SNeilBrown so_perclient); 30830fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30840fa822e4SNeilBrown * for openowners. */ 30850fa822e4SNeilBrown list_del(&sop->so_perclient); 3086f044ff83SJ. Bruce Fields release_lockowner(sop); 30871da177e4SLinus Torvalds } 30881da177e4SLinus Torvalds out: 30891da177e4SLinus Torvalds nfs4_unlock_state(); 30901da177e4SLinus Torvalds return status; 30911da177e4SLinus Torvalds } 30921da177e4SLinus Torvalds 30931da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3094a55370a3SNeilBrown alloc_reclaim(void) 30951da177e4SLinus Torvalds { 3096a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 3099c7b9a459SNeilBrown int 3100c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3101c7b9a459SNeilBrown { 3102c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3103c7b9a459SNeilBrown struct nfs4_client *clp; 3104c7b9a459SNeilBrown 3105c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3106c7b9a459SNeilBrown return clp ? 1 : 0; 3107c7b9a459SNeilBrown } 3108c7b9a459SNeilBrown 31091da177e4SLinus Torvalds /* 31101da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 31111da177e4SLinus Torvalds */ 3112190e4fbfSNeilBrown int 3113190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 31141da177e4SLinus Torvalds { 31151da177e4SLinus Torvalds unsigned int strhashval; 31161da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31171da177e4SLinus Torvalds 3118a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3119a55370a3SNeilBrown crp = alloc_reclaim(); 31201da177e4SLinus Torvalds if (!crp) 31211da177e4SLinus Torvalds return 0; 3122a55370a3SNeilBrown strhashval = clientstr_hashval(name); 31231da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 31241da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3125a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 31261da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 31271da177e4SLinus Torvalds return 1; 31281da177e4SLinus Torvalds } 31291da177e4SLinus Torvalds 31301da177e4SLinus Torvalds static void 31311da177e4SLinus Torvalds nfs4_release_reclaim(void) 31321da177e4SLinus Torvalds { 31331da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31341da177e4SLinus Torvalds int i; 31351da177e4SLinus Torvalds 31361da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31371da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 31381da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 31391da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 31401da177e4SLinus Torvalds list_del(&crp->cr_strhash); 31411da177e4SLinus Torvalds kfree(crp); 31421da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 31431da177e4SLinus Torvalds } 31441da177e4SLinus Torvalds } 31451da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds 31481da177e4SLinus Torvalds /* 31491da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3150fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31511da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31521da177e4SLinus Torvalds { 31531da177e4SLinus Torvalds unsigned int strhashval; 31541da177e4SLinus Torvalds struct nfs4_client *clp; 31551da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds 31581da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31591da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31601da177e4SLinus Torvalds if (clp == NULL) 31611da177e4SLinus Torvalds return NULL; 31621da177e4SLinus Torvalds 3163a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3164a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3165a55370a3SNeilBrown clp->cl_recdir); 31661da177e4SLinus Torvalds 31671da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3168a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31691da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3170a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31711da177e4SLinus Torvalds return crp; 31721da177e4SLinus Torvalds } 31731da177e4SLinus Torvalds } 31741da177e4SLinus Torvalds return NULL; 31751da177e4SLinus Torvalds } 31761da177e4SLinus Torvalds 31771da177e4SLinus Torvalds /* 31781da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31791da177e4SLinus Torvalds */ 3180b37ad28bSAl Viro __be32 31811da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31821da177e4SLinus Torvalds { 3183dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31841da177e4SLinus Torvalds } 31851da177e4SLinus Torvalds 3186ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31871da177e4SLinus Torvalds 3188e8ff2a84SJ. Bruce Fields int 3189ac4d8ff2SNeilBrown nfs4_state_init(void) 31901da177e4SLinus Torvalds { 3191e8ff2a84SJ. Bruce Fields int i, status; 31921da177e4SLinus Torvalds 3193e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3194e8ff2a84SJ. Bruce Fields if (status) 3195e8ff2a84SJ. Bruce Fields return status; 31961da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31971da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31981da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31991da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 32001da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 32011da177e4SLinus Torvalds } 32021da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 32031da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 32041da177e4SLinus Torvalds } 32051da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 32061da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 32071da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 32081da177e4SLinus Torvalds } 32091da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 32101da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 32111da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 32121da177e4SLinus Torvalds } 32131da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 32141da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 32151da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 32161da177e4SLinus Torvalds } 32171da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 32181da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 32191da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 32201da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3221ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3222ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3223ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3224e8ff2a84SJ. Bruce Fields return 0; 3225ac4d8ff2SNeilBrown } 3226ac4d8ff2SNeilBrown 3227190e4fbfSNeilBrown static void 3228190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3229190e4fbfSNeilBrown { 3230190e4fbfSNeilBrown int status; 3231190e4fbfSNeilBrown 32320964a3d3SNeilBrown nfs4_lock_state(); 32330964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3234190e4fbfSNeilBrown status = nfsd4_recdir_load(); 32350964a3d3SNeilBrown nfs4_unlock_state(); 3236190e4fbfSNeilBrown if (status) 3237190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3238190e4fbfSNeilBrown } 3239190e4fbfSNeilBrown 32409a8db97eSMarc Eshel unsigned long 32419a8db97eSMarc Eshel get_nfs4_grace_period(void) 32429a8db97eSMarc Eshel { 32439a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 32449a8db97eSMarc Eshel } 32459a8db97eSMarc Eshel 3246c2f1a551SMeelap Shah /* 3247c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3248c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3249c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3250c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3251c2f1a551SMeelap Shah * 3252c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3253c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3254c2f1a551SMeelap Shah */ 3255c2f1a551SMeelap Shah static void 3256c2f1a551SMeelap Shah set_max_delegations(void) 3257c2f1a551SMeelap Shah { 3258c2f1a551SMeelap Shah /* 3259c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3260c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3261c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3262c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3263c2f1a551SMeelap Shah */ 3264c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3265c2f1a551SMeelap Shah } 3266c2f1a551SMeelap Shah 3267ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3268ac4d8ff2SNeilBrown 3269ac4d8ff2SNeilBrown static void 3270ac4d8ff2SNeilBrown __nfs4_state_start(void) 3271ac4d8ff2SNeilBrown { 32729a8db97eSMarc Eshel unsigned long grace_time; 3273ac4d8ff2SNeilBrown 32741da177e4SLinus Torvalds boot_time = get_seconds(); 3275af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3276d99a05adSNeilBrown lease_time = user_lease_time; 3277af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 32789a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32799a8db97eSMarc Eshel grace_time/HZ); 328058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32819a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3282c2f1a551SMeelap Shah set_max_delegations(); 32831da177e4SLinus Torvalds } 32841da177e4SLinus Torvalds 3285e8ff2a84SJ. Bruce Fields void 328676a3550eSNeilBrown nfs4_state_start(void) 32871da177e4SLinus Torvalds { 32881da177e4SLinus Torvalds if (nfs4_init) 3289e8ff2a84SJ. Bruce Fields return; 3290190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 329176a3550eSNeilBrown __nfs4_state_start(); 32921da177e4SLinus Torvalds nfs4_init = 1; 3293e8ff2a84SJ. Bruce Fields return; 32941da177e4SLinus Torvalds } 32951da177e4SLinus Torvalds 32961da177e4SLinus Torvalds time_t 32971da177e4SLinus Torvalds nfs4_lease_time(void) 32981da177e4SLinus Torvalds { 32991da177e4SLinus Torvalds return lease_time; 33001da177e4SLinus Torvalds } 33011da177e4SLinus Torvalds 33021da177e4SLinus Torvalds static void 33031da177e4SLinus Torvalds __nfs4_state_shutdown(void) 33041da177e4SLinus Torvalds { 33051da177e4SLinus Torvalds int i; 33061da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 33071da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 33081da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 33091da177e4SLinus Torvalds 33101da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 33111da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 33121da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 33131da177e4SLinus Torvalds expire_client(clp); 33141da177e4SLinus Torvalds } 33151da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 33161da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 33171da177e4SLinus Torvalds expire_client(clp); 33181da177e4SLinus Torvalds } 33191da177e4SLinus Torvalds } 33201da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 33211da177e4SLinus Torvalds spin_lock(&recall_lock); 33221da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 33231da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 33241da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 33251da177e4SLinus Torvalds } 33261da177e4SLinus Torvalds spin_unlock(&recall_lock); 33271da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 33281da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 33291da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 33301da177e4SLinus Torvalds unhash_delegation(dp); 33311da177e4SLinus Torvalds } 33321da177e4SLinus Torvalds 3333190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 33341da177e4SLinus Torvalds nfs4_init = 0; 33351da177e4SLinus Torvalds } 33361da177e4SLinus Torvalds 33371da177e4SLinus Torvalds void 33381da177e4SLinus Torvalds nfs4_state_shutdown(void) 33391da177e4SLinus Torvalds { 33405e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 33415e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 33422c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 33431da177e4SLinus Torvalds nfs4_lock_state(); 33441da177e4SLinus Torvalds nfs4_release_reclaim(); 33451da177e4SLinus Torvalds __nfs4_state_shutdown(); 33461da177e4SLinus Torvalds nfs4_unlock_state(); 33471da177e4SLinus Torvalds } 33481da177e4SLinus Torvalds 33493dd98a3bSJeff Layton /* 33503dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 33513dd98a3bSJeff Layton * accessed when nfsd is starting. 33523dd98a3bSJeff Layton */ 33530964a3d3SNeilBrown static void 33540964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33550964a3d3SNeilBrown { 33560964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33570964a3d3SNeilBrown } 33580964a3d3SNeilBrown 33590964a3d3SNeilBrown /* 33600964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33610964a3d3SNeilBrown */ 33620964a3d3SNeilBrown int 33630964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33640964a3d3SNeilBrown { 33650964a3d3SNeilBrown int status; 3366a63bb996SAl Viro struct path path; 33670964a3d3SNeilBrown 3368a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 33690964a3d3SNeilBrown if (status) 33700964a3d3SNeilBrown return status; 33710964a3d3SNeilBrown status = -ENOTDIR; 3372a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 33730964a3d3SNeilBrown nfs4_set_recdir(recdir); 33740964a3d3SNeilBrown status = 0; 33750964a3d3SNeilBrown } 3376a63bb996SAl Viro path_put(&path); 33770964a3d3SNeilBrown return status; 33780964a3d3SNeilBrown } 33790964a3d3SNeilBrown 33803dd98a3bSJeff Layton char * 33813dd98a3bSJeff Layton nfs4_recoverydir(void) 33823dd98a3bSJeff Layton { 33833dd98a3bSJeff Layton return user_recovery_dirname; 33843dd98a3bSJeff Layton } 33853dd98a3bSJeff Layton 33861da177e4SLinus Torvalds /* 33871da177e4SLinus Torvalds * Called when leasetime is changed. 33881da177e4SLinus Torvalds * 3389d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3390d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3391d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3392d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3393d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33943dd98a3bSJeff Layton * 33953dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 33963dd98a3bSJeff Layton * when nfsd is starting 33971da177e4SLinus Torvalds */ 33981da177e4SLinus Torvalds void 33991da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 34001da177e4SLinus Torvalds { 3401d99a05adSNeilBrown user_lease_time = leasetime; 34021da177e4SLinus Torvalds } 3403