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 811da177e4SLinus Torvalds /* Locking: 821da177e4SLinus Torvalds * 83353ab6e9SIngo Molnar * client_mutex: 841da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 851da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 861da177e4SLinus Torvalds */ 87353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 881da177e4SLinus Torvalds 89e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 93e60d4398SNeilBrown 941da177e4SLinus Torvalds void 951da177e4SLinus Torvalds nfs4_lock_state(void) 961da177e4SLinus Torvalds { 97353ab6e9SIngo Molnar mutex_lock(&client_mutex); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds void 1011da177e4SLinus Torvalds nfs4_unlock_state(void) 1021da177e4SLinus Torvalds { 103353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static inline u32 1071da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds u32 x = 0; 1121da177e4SLinus Torvalds while (nbytes--) { 1131da177e4SLinus Torvalds x *= 37; 1141da177e4SLinus Torvalds x += *cptr++; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds return x; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* 1201da177e4SLinus Torvalds * Delegation state 1211da177e4SLinus Torvalds */ 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 12434af946aSIngo Molnar static DEFINE_SPINLOCK(recall_lock); 1251da177e4SLinus Torvalds static struct list_head del_recall_lru; 1261da177e4SLinus Torvalds 12713cd2184SNeilBrown static void 12813cd2184SNeilBrown free_nfs4_file(struct kref *kref) 12913cd2184SNeilBrown { 13013cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13113cd2184SNeilBrown list_del(&fp->fi_hash); 13213cd2184SNeilBrown iput(fp->fi_inode); 13313cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13413cd2184SNeilBrown } 13513cd2184SNeilBrown 13613cd2184SNeilBrown static inline void 13713cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 13813cd2184SNeilBrown { 13913cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14013cd2184SNeilBrown } 14113cd2184SNeilBrown 14213cd2184SNeilBrown static inline void 14313cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14413cd2184SNeilBrown { 14513cd2184SNeilBrown kref_get(&fi->fi_ref); 14613cd2184SNeilBrown } 14713cd2184SNeilBrown 148ef0f3390SNeilBrown static int num_delegations; 149c2f1a551SMeelap Shah unsigned int max_delegations; 150ef0f3390SNeilBrown 151ef0f3390SNeilBrown /* 152ef0f3390SNeilBrown * Open owner state (share locks) 153ef0f3390SNeilBrown */ 154ef0f3390SNeilBrown 155ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 156ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 157ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 158ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 159ef0f3390SNeilBrown 160ef0f3390SNeilBrown #define ownerid_hashval(id) \ 161ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 162ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 163ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 164ef0f3390SNeilBrown 165ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 166ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 167ef0f3390SNeilBrown 168ef0f3390SNeilBrown /* hash table for nfs4_file */ 169ef0f3390SNeilBrown #define FILE_HASH_BITS 8 170ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 171ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 172ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 173ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 174ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 175ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 176ef0f3390SNeilBrown 177ef0f3390SNeilBrown #define file_hashval(x) \ 178ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 179ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 180ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 181ef0f3390SNeilBrown 182ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 183ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 184ef0f3390SNeilBrown 1851da177e4SLinus Torvalds static struct nfs4_delegation * 1861da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1871da177e4SLinus Torvalds { 1881da177e4SLinus Torvalds struct nfs4_delegation *dp; 1891da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1901da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1911da177e4SLinus Torvalds 1921da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 19347f9940cSMeelap Shah if (fp->fi_had_conflict) 19447f9940cSMeelap Shah return NULL; 195c2f1a551SMeelap Shah if (num_delegations > max_delegations) 196ef0f3390SNeilBrown return NULL; 1975b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1985b2d21c1SNeilBrown if (dp == NULL) 1991da177e4SLinus Torvalds return dp; 200ef0f3390SNeilBrown num_delegations++; 201ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 202ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2031da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2041da177e4SLinus Torvalds dp->dl_client = clp; 20513cd2184SNeilBrown get_nfs4_file(fp); 2061da177e4SLinus Torvalds dp->dl_file = fp; 2071da177e4SLinus Torvalds dp->dl_flock = NULL; 2081da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2091da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2101da177e4SLinus Torvalds dp->dl_type = type; 2111da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2121da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2131da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2141da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2151da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2161da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2171da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2186c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2191da177e4SLinus Torvalds dp->dl_time = 0; 2201da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 221ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 222ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2231da177e4SLinus Torvalds return dp; 2241da177e4SLinus Torvalds } 2251da177e4SLinus Torvalds 2261da177e4SLinus Torvalds void 2271da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2281da177e4SLinus Torvalds { 2291da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2301da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 23113cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2325b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 233ef0f3390SNeilBrown num_delegations--; 2341da177e4SLinus Torvalds } 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds 2371da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2381da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2391da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2401da177e4SLinus Torvalds * fl_release_callback. 2411da177e4SLinus Torvalds */ 2421da177e4SLinus Torvalds static void 2431da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2441da177e4SLinus Torvalds { 2451da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2461da177e4SLinus Torvalds 2471da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2481da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2491da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2501da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 251c907132dSNeilBrown if (dp->dl_flock) 252a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2531da177e4SLinus Torvalds nfsd_close(filp); 2541da177e4SLinus Torvalds } 2551da177e4SLinus Torvalds 2561da177e4SLinus Torvalds /* Called under the state lock. */ 2571da177e4SLinus Torvalds static void 2581da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2591da177e4SLinus Torvalds { 260ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 261ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2621da177e4SLinus Torvalds spin_lock(&recall_lock); 2631da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2641da177e4SLinus Torvalds spin_unlock(&recall_lock); 2651da177e4SLinus Torvalds nfs4_close_delegation(dp); 2661da177e4SLinus Torvalds nfs4_put_delegation(dp); 2671da177e4SLinus Torvalds } 2681da177e4SLinus Torvalds 2691da177e4SLinus Torvalds /* 2701da177e4SLinus Torvalds * SETCLIENTID state 2711da177e4SLinus Torvalds */ 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2741da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2751da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2761da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2771da177e4SLinus Torvalds 2781da177e4SLinus Torvalds #define clientid_hashval(id) \ 2791da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 280a55370a3SNeilBrown #define clientstr_hashval(name) \ 281a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2821da177e4SLinus Torvalds /* 2831da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2841da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2851da177e4SLinus Torvalds * 2861da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2871da177e4SLinus Torvalds * setclientid_confirmed info. 2881da177e4SLinus Torvalds * 2891da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2901da177e4SLinus Torvalds * setclientid info. 2911da177e4SLinus Torvalds * 2921da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2931da177e4SLinus Torvalds * for lease renewal. 2941da177e4SLinus Torvalds * 2951da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2961da177e4SLinus Torvalds * for last close replay. 2971da177e4SLinus Torvalds */ 2981da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2991da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3001da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3011da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3021da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3031da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3041da177e4SLinus Torvalds static struct list_head client_lru; 3051da177e4SLinus Torvalds static struct list_head close_lru; 3061da177e4SLinus Torvalds 3072283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 3082283963fSJ. Bruce Fields { 3092283963fSJ. Bruce Fields list_del(&stp->st_hash); 3102283963fSJ. Bruce Fields list_del(&stp->st_perfile); 3112283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 3122283963fSJ. Bruce Fields } 3132283963fSJ. Bruce Fields 3142283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 3152283963fSJ. Bruce Fields { 3162283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3172283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3182283963fSJ. Bruce Fields } 3192283963fSJ. Bruce Fields 3202283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3212283963fSJ. Bruce Fields { 3222283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3232283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3242283963fSJ. Bruce Fields free_generic_stateid(stp); 3252283963fSJ. Bruce Fields } 3262283963fSJ. Bruce Fields 327f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 328f044ff83SJ. Bruce Fields { 329f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 330f044ff83SJ. Bruce Fields 331f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 332f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 333f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 334f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 335f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 336f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 337f044ff83SJ. Bruce Fields release_lock_stateid(stp); 338f044ff83SJ. Bruce Fields } 339f044ff83SJ. Bruce Fields } 340f044ff83SJ. Bruce Fields 341f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 342f044ff83SJ. Bruce Fields { 343f044ff83SJ. Bruce Fields unhash_lockowner(sop); 344f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 345f044ff83SJ. Bruce Fields } 346f044ff83SJ. Bruce Fields 347f1d110caSJ. Bruce Fields static void 348f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 349f1d110caSJ. Bruce Fields { 350f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 351f1d110caSJ. Bruce Fields 352f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 353f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 354f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 355f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 356f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 357f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 358f1d110caSJ. Bruce Fields } 359f1d110caSJ. Bruce Fields } 360f1d110caSJ. Bruce Fields 3612283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3622283963fSJ. Bruce Fields { 3632283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3642283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3652283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3662283963fSJ. Bruce Fields free_generic_stateid(stp); 3672283963fSJ. Bruce Fields } 3682283963fSJ. Bruce Fields 369f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 370f1d110caSJ. Bruce Fields { 371f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 372f1d110caSJ. Bruce Fields 373f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 374f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 375f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 376f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 377f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 378f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 379f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 380f1d110caSJ. Bruce Fields release_open_stateid(stp); 381f1d110caSJ. Bruce Fields } 382f1d110caSJ. Bruce Fields } 383f1d110caSJ. Bruce Fields 384f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 385f1d110caSJ. Bruce Fields { 386f044ff83SJ. Bruce Fields unhash_openowner(sop); 387f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 388f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 389f1d110caSJ. Bruce Fields } 390f1d110caSJ. Bruce Fields 3911da177e4SLinus Torvalds static inline void 3921da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 3931da177e4SLinus Torvalds { 3941da177e4SLinus Torvalds /* 3951da177e4SLinus Torvalds * Move client to the end to the LRU list. 3961da177e4SLinus Torvalds */ 3971da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 3981da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 3991da177e4SLinus Torvalds clp->cl_clientid.cl_id); 4001da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 4011da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 4051da177e4SLinus Torvalds static int 4061da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 4071da177e4SLinus Torvalds { 4081da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 4091da177e4SLinus Torvalds return 0; 4101da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 4111da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 4121da177e4SLinus Torvalds return 1; 4131da177e4SLinus Torvalds } 4141da177e4SLinus Torvalds 4151da177e4SLinus Torvalds /* 4161da177e4SLinus Torvalds * XXX Should we use a slab cache ? 4171da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 4181da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 4191da177e4SLinus Torvalds */ 42035bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 4211da177e4SLinus Torvalds { 4221da177e4SLinus Torvalds struct nfs4_client *clp; 4231da177e4SLinus Torvalds 42435bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 42535bba9a3SJ. Bruce Fields if (clp == NULL) 42635bba9a3SJ. Bruce Fields return NULL; 42735bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 42835bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 42935bba9a3SJ. Bruce Fields kfree(clp); 43035bba9a3SJ. Bruce Fields return NULL; 43135bba9a3SJ. Bruce Fields } 4321da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 4331da177e4SLinus Torvalds clp->cl_name.len = name.len; 4341da177e4SLinus Torvalds return clp; 4351da177e4SLinus Torvalds } 4361da177e4SLinus Torvalds 4371b1a9b31SJ. Bruce Fields static void 4381b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 4391b1a9b31SJ. Bruce Fields { 4401b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 4411b1a9b31SJ. Bruce Fields 4421b1a9b31SJ. Bruce Fields if (clnt) { 443404ec117SJ. Bruce Fields /* 444404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 445404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 446404ec117SJ. Bruce Fields */ 4471b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 4481b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 4491b1a9b31SJ. Bruce Fields } 4501b1a9b31SJ. Bruce Fields } 4511b1a9b31SJ. Bruce Fields 4521da177e4SLinus Torvalds static inline void 4531da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 4541da177e4SLinus Torvalds { 4551b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 4561da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 4571da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 45868e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 4591da177e4SLinus Torvalds kfree(clp->cl_name.data); 4601da177e4SLinus Torvalds kfree(clp); 4611da177e4SLinus Torvalds } 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds void 4641da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 4651da177e4SLinus Torvalds { 4661da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 4671da177e4SLinus Torvalds free_client(clp); 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds static void 4711da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 4721da177e4SLinus Torvalds { 4731da177e4SLinus Torvalds struct nfs4_stateowner *sop; 4741da177e4SLinus Torvalds struct nfs4_delegation *dp; 4751da177e4SLinus Torvalds struct list_head reaplist; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 4781da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4811da177e4SLinus Torvalds spin_lock(&recall_lock); 482ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 483ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4841da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4851da177e4SLinus Torvalds dp->dl_flock); 486ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4871da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds spin_unlock(&recall_lock); 4901da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4911da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4921da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4931da177e4SLinus Torvalds unhash_delegation(dp); 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4961da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4971da177e4SLinus Torvalds list_del(&clp->cl_lru); 498ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 499ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 500f044ff83SJ. Bruce Fields release_openowner(sop); 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds put_nfs4_client(clp); 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 50535bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 50635bba9a3SJ. Bruce Fields { 5071da177e4SLinus Torvalds struct nfs4_client *clp; 5081da177e4SLinus Torvalds 50935bba9a3SJ. Bruce Fields clp = alloc_client(name); 51035bba9a3SJ. Bruce Fields if (clp == NULL) 51135bba9a3SJ. Bruce Fields return NULL; 512a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 5131da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 5141da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 5151da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 5161da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 517ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 518ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 5191da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 5201da177e4SLinus Torvalds return clp; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 52335bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 52435bba9a3SJ. Bruce Fields { 52535bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 52635bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds 52935bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 53035bba9a3SJ. Bruce Fields { 5311da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 5321da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 5331da177e4SLinus Torvalds } 5341da177e4SLinus Torvalds 53535bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 53635bba9a3SJ. Bruce Fields { 5371da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 5381da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 5391da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 5401da177e4SLinus Torvalds get_group_info(target->cr_group_info); 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds 54335bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 544599e0a22SJ. Bruce Fields { 545a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds static int 549599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 550599e0a22SJ. Bruce Fields { 551599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds 5541da177e4SLinus Torvalds static int 555599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 556599e0a22SJ. Bruce Fields { 557599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds 5601da177e4SLinus Torvalds /* XXX what about NGROUP */ 5611da177e4SLinus Torvalds static int 562599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 563599e0a22SJ. Bruce Fields { 564599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds 5675ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 5685ec7b46cSJ. Bruce Fields { 5695ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 5705ec7b46cSJ. Bruce Fields 5711da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 5721da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 575deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 576deda2faaSJ. Bruce Fields { 577deda2faaSJ. Bruce Fields static u32 i; 5781da177e4SLinus Torvalds u32 *p; 5791da177e4SLinus Torvalds 5801da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 581deda2faaSJ. Bruce Fields *p++ = get_seconds(); 582deda2faaSJ. Bruce Fields *p++ = i++; 5831da177e4SLinus Torvalds } 5841da177e4SLinus Torvalds 58535bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 58635bba9a3SJ. Bruce Fields { 5871da177e4SLinus Torvalds if (name.len == 0) 5881da177e4SLinus Torvalds return 0; 5891da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5902fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 5911da177e4SLinus Torvalds return 0; 5921da177e4SLinus Torvalds } 5931da177e4SLinus Torvalds return 1; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds 596fd39ca9aSNeilBrown static void 5971da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds unsigned int idhashval; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 6021da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6031da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 6041da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 6051da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds 608fd39ca9aSNeilBrown static void 6091da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 6101da177e4SLinus Torvalds { 6111da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6121da177e4SLinus Torvalds unsigned int strhashval; 6131da177e4SLinus Torvalds 6141da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 6151da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 616f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 617a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 6181da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 6191da177e4SLinus Torvalds renew_client(clp); 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds 6221da177e4SLinus Torvalds static struct nfs4_client * 6231da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 6241da177e4SLinus Torvalds { 6251da177e4SLinus Torvalds struct nfs4_client *clp; 6261da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 629599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 6301da177e4SLinus Torvalds return clp; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds return NULL; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds static struct nfs4_client * 6361da177e4SLinus Torvalds find_unconfirmed_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, &unconf_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 64828ce6054SNeilBrown static struct nfs4_client * 64928ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 65028ce6054SNeilBrown { 65128ce6054SNeilBrown struct nfs4_client *clp; 65228ce6054SNeilBrown 65328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 65428ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 65528ce6054SNeilBrown return clp; 65628ce6054SNeilBrown } 65728ce6054SNeilBrown return NULL; 65828ce6054SNeilBrown } 65928ce6054SNeilBrown 66028ce6054SNeilBrown static struct nfs4_client * 66128ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 66228ce6054SNeilBrown { 66328ce6054SNeilBrown struct nfs4_client *clp; 66428ce6054SNeilBrown 66528ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 66628ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 66728ce6054SNeilBrown return clp; 66828ce6054SNeilBrown } 66928ce6054SNeilBrown return NULL; 67028ce6054SNeilBrown } 67128ce6054SNeilBrown 6721da177e4SLinus Torvalds /* a helper function for parse_callback */ 6731da177e4SLinus Torvalds static int 6741da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 6751da177e4SLinus Torvalds { 6761da177e4SLinus Torvalds unsigned int len = *lenp; 6771da177e4SLinus Torvalds char *p = *addrp; 6781da177e4SLinus Torvalds int n = -1; 6791da177e4SLinus Torvalds char c; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds for (;;) { 6821da177e4SLinus Torvalds if (!len) 6831da177e4SLinus Torvalds break; 6841da177e4SLinus Torvalds len--; 6851da177e4SLinus Torvalds c = *p++; 6861da177e4SLinus Torvalds if (c == '.') 6871da177e4SLinus Torvalds break; 6881da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6891da177e4SLinus Torvalds n = -1; 6901da177e4SLinus Torvalds break; 6911da177e4SLinus Torvalds } 6921da177e4SLinus Torvalds if (n < 0) 6931da177e4SLinus Torvalds n = 0; 6941da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6951da177e4SLinus Torvalds if (n > 255) { 6961da177e4SLinus Torvalds n = -1; 6971da177e4SLinus Torvalds break; 6981da177e4SLinus Torvalds } 6991da177e4SLinus Torvalds } 7001da177e4SLinus Torvalds *lenp = len; 7011da177e4SLinus Torvalds *addrp = p; 7021da177e4SLinus Torvalds return n; 7031da177e4SLinus Torvalds } 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 706fd39ca9aSNeilBrown static int 7071da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 7081da177e4SLinus Torvalds { 7091da177e4SLinus Torvalds int temp = 0; 7101da177e4SLinus Torvalds u32 cbaddr = 0; 7111da177e4SLinus Torvalds u16 cbport = 0; 7121da177e4SLinus Torvalds u32 addrlen = addr_len; 7131da177e4SLinus Torvalds char *addr = addr_val; 7141da177e4SLinus Torvalds int i, shift; 7151da177e4SLinus Torvalds 7161da177e4SLinus Torvalds /* ipaddress */ 7171da177e4SLinus Torvalds shift = 24; 7181da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 7191da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7201da177e4SLinus Torvalds return 0; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds cbaddr |= (temp << shift); 7231da177e4SLinus Torvalds if (shift > 0) 7241da177e4SLinus Torvalds shift -= 8; 7251da177e4SLinus Torvalds } 7261da177e4SLinus Torvalds *cbaddrp = cbaddr; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds /* port */ 7291da177e4SLinus Torvalds shift = 8; 7301da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 7311da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 7321da177e4SLinus Torvalds return 0; 7331da177e4SLinus Torvalds } 7341da177e4SLinus Torvalds cbport |= (temp << shift); 7351da177e4SLinus Torvalds if (shift > 0) 7361da177e4SLinus Torvalds shift -= 8; 7371da177e4SLinus Torvalds } 7381da177e4SLinus Torvalds *cbportp = cbport; 7391da177e4SLinus Torvalds return 1; 7401da177e4SLinus Torvalds } 7411da177e4SLinus Torvalds 742fd39ca9aSNeilBrown static void 7431da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 7441da177e4SLinus Torvalds { 7451da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 7481da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 7491da177e4SLinus Torvalds goto out_err; 7501da177e4SLinus Torvalds 7511da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 7521da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 7531da177e4SLinus Torvalds goto out_err; 7541da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 7551da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 7561da177e4SLinus Torvalds return; 7571da177e4SLinus Torvalds out_err: 758849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 7591da177e4SLinus Torvalds "will not receive delegations\n", 7601da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 7611da177e4SLinus Torvalds 7621da177e4SLinus Torvalds return; 7631da177e4SLinus Torvalds } 7641da177e4SLinus Torvalds 765b37ad28bSAl Viro __be32 766b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 767b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 7681da177e4SLinus Torvalds { 76927459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 7701da177e4SLinus Torvalds struct xdr_netobj clname = { 7711da177e4SLinus Torvalds .len = setclid->se_namelen, 7721da177e4SLinus Torvalds .data = setclid->se_name, 7731da177e4SLinus Torvalds }; 7741da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7751da177e4SLinus Torvalds unsigned int strhashval; 77628ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 777b37ad28bSAl Viro __be32 status; 77868e76ad0SOlga Kornievskaia char *princ; 779a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7801da177e4SLinus Torvalds 7811da177e4SLinus Torvalds if (!check_name(clname)) 78273aea4ecSNeil Brown return nfserr_inval; 7831da177e4SLinus Torvalds 784a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 785a55370a3SNeilBrown if (status) 78673aea4ecSNeil Brown return status; 787a55370a3SNeilBrown 7881da177e4SLinus Torvalds /* 7891da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7901da177e4SLinus Torvalds * We get here on a DRC miss. 7911da177e4SLinus Torvalds */ 7921da177e4SLinus Torvalds 793a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7941da177e4SLinus Torvalds 7951da177e4SLinus Torvalds nfs4_lock_state(); 79628ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 79728ce6054SNeilBrown if (conf) { 798a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 7991da177e4SLinus Torvalds status = nfserr_clid_inuse; 800599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) 80127459f09SChuck Lever || conf->cl_addr != sin->sin_addr.s_addr) { 802be859405SHarvey Harrison dprintk("NFSD: setclientid: string in use by clientat %pI4\n", 803be859405SHarvey Harrison &conf->cl_addr); 8041da177e4SLinus Torvalds goto out; 8051da177e4SLinus Torvalds } 8061da177e4SLinus Torvalds } 807a186e767SJ. Bruce Fields /* 808a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 809a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 810a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 811a186e767SJ. Bruce Fields */ 81228ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 8131da177e4SLinus Torvalds status = nfserr_resource; 8141da177e4SLinus Torvalds if (!conf) { 8151da177e4SLinus Torvalds /* 816a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 817a186e767SJ. Bruce Fields * placed first, because it is the normal case 8181da177e4SLinus Torvalds */ 8191da177e4SLinus Torvalds if (unconf) 8201da177e4SLinus Torvalds expire_client(unconf); 821a55370a3SNeilBrown new = create_client(clname, dname); 822a55370a3SNeilBrown if (new == NULL) 8231da177e4SLinus Torvalds goto out; 8241da177e4SLinus Torvalds gen_clid(new); 825599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 8261da177e4SLinus Torvalds /* 827a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 828a186e767SJ. Bruce Fields * probable callback update 8291da177e4SLinus Torvalds */ 83031f4a6c1SNeilBrown if (unconf) { 83131f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 83231f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 83331f4a6c1SNeilBrown * This has the advantage that there is at most 83431f4a6c1SNeilBrown * one {*x***} in either list at any time. 83531f4a6c1SNeilBrown */ 8361da177e4SLinus Torvalds expire_client(unconf); 8371da177e4SLinus Torvalds } 838a55370a3SNeilBrown new = create_client(clname, dname); 839a55370a3SNeilBrown if (new == NULL) 8401da177e4SLinus Torvalds goto out; 8411da177e4SLinus Torvalds copy_clid(new, conf); 8421da177e4SLinus Torvalds } else if (!unconf) { 8431da177e4SLinus Torvalds /* 844a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 845a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 846a186e767SJ. Bruce Fields * confirmed. 8471da177e4SLinus Torvalds */ 848a55370a3SNeilBrown new = create_client(clname, dname); 849a55370a3SNeilBrown if (new == NULL) 8501da177e4SLinus Torvalds goto out; 8511da177e4SLinus Torvalds gen_clid(new); 85249ba8781SJ. Bruce Fields } else { 8531da177e4SLinus Torvalds /* 854a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 855a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 856a186e767SJ. Bruce Fields * confirmed. 8571da177e4SLinus Torvalds */ 8581da177e4SLinus Torvalds expire_client(unconf); 859a55370a3SNeilBrown new = create_client(clname, dname); 860a55370a3SNeilBrown if (new == NULL) 8611da177e4SLinus Torvalds goto out; 8621da177e4SLinus Torvalds gen_clid(new); 8631da177e4SLinus Torvalds } 864c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 865c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 86661054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 86768e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 86868e76ad0SOlga Kornievskaia if (princ) { 86968e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 87068e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 87168e76ad0SOlga Kornievskaia free_client(new); 87268e76ad0SOlga Kornievskaia goto out; 87368e76ad0SOlga Kornievskaia } 87468e76ad0SOlga Kornievskaia } 875c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 876c175b83cSJ. Bruce Fields gen_confirm(new); 877c175b83cSJ. Bruce Fields gen_callback(new, setclid); 878c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 8791da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8801da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8811da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8821da177e4SLinus Torvalds status = nfs_ok; 8831da177e4SLinus Torvalds out: 8841da177e4SLinus Torvalds nfs4_unlock_state(); 8851da177e4SLinus Torvalds return status; 8861da177e4SLinus Torvalds } 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds 8891da177e4SLinus Torvalds /* 890a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 891a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 892a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 8931da177e4SLinus Torvalds */ 894b37ad28bSAl Viro __be32 895b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 896b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 897b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 8981da177e4SLinus Torvalds { 89927459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 90021ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 9011da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 9021da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 903b37ad28bSAl Viro __be32 status; 9041da177e4SLinus Torvalds 9051da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 9061da177e4SLinus Torvalds return nfserr_stale_clientid; 9071da177e4SLinus Torvalds /* 9081da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 9091da177e4SLinus Torvalds * We get here on a DRC miss. 9101da177e4SLinus Torvalds */ 9111da177e4SLinus Torvalds 9121da177e4SLinus Torvalds nfs4_lock_state(); 91321ab45a4SNeilBrown 91421ab45a4SNeilBrown conf = find_confirmed_client(clid); 91521ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 91621ab45a4SNeilBrown 91722de4d83SNeilBrown status = nfserr_clid_inuse; 91827459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 9191da177e4SLinus Torvalds goto out; 92027459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 9211da177e4SLinus Torvalds goto out; 92221ab45a4SNeilBrown 923a186e767SJ. Bruce Fields /* 924a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 925a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 926a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 927a186e767SJ. Bruce Fields */ 928366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 929a186e767SJ. Bruce Fields /* 930a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 931a186e767SJ. Bruce Fields * callback update 9327c79f737SNeilBrown */ 933599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 9341da177e4SLinus Torvalds status = nfserr_clid_inuse; 9351da177e4SLinus Torvalds else { 9361a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9371a69c179SNeilBrown * change request correctly. */ 938cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 93921ab45a4SNeilBrown gen_confirm(conf); 94046309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9411a69c179SNeilBrown expire_client(unconf); 9421da177e4SLinus Torvalds status = nfs_ok; 9431a69c179SNeilBrown 9441da177e4SLinus Torvalds } 945f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 946a186e767SJ. Bruce Fields /* 947a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 948a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 949a186e767SJ. Bruce Fields * do nothing. 9507c79f737SNeilBrown */ 951599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 9521da177e4SLinus Torvalds status = nfserr_clid_inuse; 95321ab45a4SNeilBrown else 9541da177e4SLinus Torvalds status = nfs_ok; 9557c79f737SNeilBrown } else if (!conf && unconf 956599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 957a186e767SJ. Bruce Fields /* 958a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 959a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 9601da177e4SLinus Torvalds */ 961599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9621da177e4SLinus Torvalds status = nfserr_clid_inuse; 9631da177e4SLinus Torvalds } else { 9641a69c179SNeilBrown unsigned int hash = 9651a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9661a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9671a69c179SNeilBrown hash); 9681a69c179SNeilBrown if (conf) { 969c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9701a69c179SNeilBrown expire_client(conf); 9711a69c179SNeilBrown } 9721da177e4SLinus Torvalds move_to_confirmed(unconf); 97321ab45a4SNeilBrown conf = unconf; 97446f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 9751a69c179SNeilBrown status = nfs_ok; 9761da177e4SLinus Torvalds } 977599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 978599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 9797c79f737SNeilBrown &confirm)))) { 980a186e767SJ. Bruce Fields /* 981a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 982a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 9831da177e4SLinus Torvalds */ 9841da177e4SLinus Torvalds status = nfserr_stale_clientid; 9857c79f737SNeilBrown } else { 9861da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 98722de4d83SNeilBrown status = nfserr_clid_inuse; 98808e8987cSNeilBrown } 9891da177e4SLinus Torvalds out: 9901da177e4SLinus Torvalds nfs4_unlock_state(); 9911da177e4SLinus Torvalds return status; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9951da177e4SLinus Torvalds static inline struct nfs4_file * 9961da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9971da177e4SLinus Torvalds { 9981da177e4SLinus Torvalds struct nfs4_file *fp; 9991da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 10001da177e4SLinus Torvalds 1001e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1002e60d4398SNeilBrown if (fp) { 100313cd2184SNeilBrown kref_init(&fp->fi_ref); 10041da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 10058beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 10068beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 10071da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 10081da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 10091da177e4SLinus Torvalds fp->fi_id = current_fileid++; 101047f9940cSMeelap Shah fp->fi_had_conflict = false; 10111da177e4SLinus Torvalds return fp; 10121da177e4SLinus Torvalds } 10131da177e4SLinus Torvalds return NULL; 10141da177e4SLinus Torvalds } 10151da177e4SLinus Torvalds 10161da177e4SLinus Torvalds static void 1017e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1018e60d4398SNeilBrown { 1019e60d4398SNeilBrown if (*slab == NULL) 1020e60d4398SNeilBrown return; 10211a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1022e60d4398SNeilBrown *slab = NULL; 1023e60d4398SNeilBrown } 1024e60d4398SNeilBrown 1025e8ff2a84SJ. Bruce Fields void 1026e60d4398SNeilBrown nfsd4_free_slabs(void) 1027e60d4398SNeilBrown { 1028e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1029e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10305ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10315b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1032e60d4398SNeilBrown } 10331da177e4SLinus Torvalds 10341da177e4SLinus Torvalds static int 10351da177e4SLinus Torvalds nfsd4_init_slabs(void) 10361da177e4SLinus Torvalds { 10371da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 103820c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1039e60d4398SNeilBrown if (stateowner_slab == NULL) 1040e60d4398SNeilBrown goto out_nomem; 1041e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 104220c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1043e60d4398SNeilBrown if (file_slab == NULL) 1044e60d4398SNeilBrown goto out_nomem; 10455ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 104620c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 10475ac049acSNeilBrown if (stateid_slab == NULL) 10485ac049acSNeilBrown goto out_nomem; 10495b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 105020c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 10515b2d21c1SNeilBrown if (deleg_slab == NULL) 10525b2d21c1SNeilBrown goto out_nomem; 1053e60d4398SNeilBrown return 0; 1054e60d4398SNeilBrown out_nomem: 1055e60d4398SNeilBrown nfsd4_free_slabs(); 10561da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10571da177e4SLinus Torvalds return -ENOMEM; 10581da177e4SLinus Torvalds } 10591da177e4SLinus Torvalds 10601da177e4SLinus Torvalds void 10611da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10621da177e4SLinus Torvalds { 10631da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10641da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10651da177e4SLinus Torvalds kfree(sop->so_owner.data); 10661da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10671da177e4SLinus Torvalds } 10681da177e4SLinus Torvalds 10691da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10701da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10711da177e4SLinus Torvalds { 10721da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10751da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10761da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10771da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10781da177e4SLinus Torvalds kref_init(&sop->so_ref); 10791da177e4SLinus Torvalds return sop; 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10821da177e4SLinus Torvalds } 10831da177e4SLinus Torvalds return NULL; 10841da177e4SLinus Torvalds } 10851da177e4SLinus Torvalds 10861da177e4SLinus Torvalds static struct nfs4_stateowner * 10871da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10881da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10891da177e4SLinus Torvalds struct nfs4_replay *rp; 10901da177e4SLinus Torvalds unsigned int idhashval; 10911da177e4SLinus Torvalds 10921da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10931da177e4SLinus Torvalds return NULL; 10941da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10951da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10961da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10971da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1098ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1099ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 11001da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 11011da177e4SLinus Torvalds sop->so_time = 0; 11021da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 11031da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1104ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 11051da177e4SLinus Torvalds sop->so_is_open_owner = 1; 11061da177e4SLinus Torvalds sop->so_id = current_ownerid++; 11071da177e4SLinus Torvalds sop->so_client = clp; 11081da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 11091da177e4SLinus Torvalds sop->so_confirmed = 0; 11101da177e4SLinus Torvalds rp = &sop->so_replay; 1111de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11121da177e4SLinus Torvalds rp->rp_buflen = 0; 11131da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11141da177e4SLinus Torvalds return sop; 11151da177e4SLinus Torvalds } 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds static inline void 11181da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11191da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11201da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11211da177e4SLinus Torvalds 11221da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1123ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1124ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11251da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11261da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1127ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11288beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11291da177e4SLinus Torvalds stp->st_stateowner = sop; 113013cd2184SNeilBrown get_nfs4_file(fp); 11311da177e4SLinus Torvalds stp->st_file = fp; 11321da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11331da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11341da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11351da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11361da177e4SLinus Torvalds stp->st_access_bmap = 0; 11371da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11381da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11391da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11404c4cd222SNeilBrown stp->st_openstp = NULL; 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds static void 11441da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11451da177e4SLinus Torvalds { 11461da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11471da177e4SLinus Torvalds 1148358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11491da177e4SLinus Torvalds sop->so_time = get_seconds(); 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static int 1153599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1154599e0a22SJ. Bruce Fields clientid_t *clid) 1155599e0a22SJ. Bruce Fields { 1156599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1157599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1158599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11591da177e4SLinus Torvalds } 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds static struct nfs4_stateowner * 11621da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 11631da177e4SLinus Torvalds { 11641da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1167599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 11681da177e4SLinus Torvalds return so; 11691da177e4SLinus Torvalds } 11701da177e4SLinus Torvalds return NULL; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds 11731da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 11741da177e4SLinus Torvalds static struct nfs4_file * 11751da177e4SLinus Torvalds find_file(struct inode *ino) 11761da177e4SLinus Torvalds { 11771da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 11781da177e4SLinus Torvalds struct nfs4_file *fp; 11791da177e4SLinus Torvalds 11801da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 118113cd2184SNeilBrown if (fp->fi_inode == ino) { 118213cd2184SNeilBrown get_nfs4_file(fp); 11831da177e4SLinus Torvalds return fp; 11841da177e4SLinus Torvalds } 118513cd2184SNeilBrown } 11861da177e4SLinus Torvalds return NULL; 11871da177e4SLinus Torvalds } 11881da177e4SLinus Torvalds 11898838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1190ba5a6a19SJ. Bruce Fields { 11918838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 11928838dc43SJ. Bruce Fields return 0; 11938838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 11948838dc43SJ. Bruce Fields return 0; 11958838dc43SJ. Bruce Fields return 1; 1196ba5a6a19SJ. Bruce Fields } 1197ba5a6a19SJ. Bruce Fields 11988838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1199ba5a6a19SJ. Bruce Fields { 12008838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 12018838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1202ba5a6a19SJ. Bruce Fields } 12031da177e4SLinus Torvalds 12044f83aa30SJ. Bruce Fields /* 12054f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 12064f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 12074f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 12084f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 12094f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 12104f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 12114f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 12124f83aa30SJ. Bruce Fields * 12134f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 12144f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 12154f83aa30SJ. Bruce Fields * 12164f83aa30SJ. Bruce Fields * OPEN allow read, deny write 12174f83aa30SJ. Bruce Fields * OPEN allow both, deny none 12184f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 12194f83aa30SJ. Bruce Fields * 12204f83aa30SJ. Bruce Fields * which we should reject. 12214f83aa30SJ. Bruce Fields */ 1222fd39ca9aSNeilBrown static void 12231da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12241da177e4SLinus Torvalds int i; 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds *access = 0; 12271da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12281da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12291da177e4SLinus Torvalds *access |= i; 12301da177e4SLinus Torvalds } 12311da177e4SLinus Torvalds } 12321da177e4SLinus Torvalds 1233fd39ca9aSNeilBrown static void 12341da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12351da177e4SLinus Torvalds int i; 12361da177e4SLinus Torvalds 12371da177e4SLinus Torvalds *deny = 0; 12381da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12391da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12401da177e4SLinus Torvalds *deny |= i ; 12411da177e4SLinus Torvalds } 12421da177e4SLinus Torvalds } 12431da177e4SLinus Torvalds 12441da177e4SLinus Torvalds static int 12451da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12461da177e4SLinus Torvalds unsigned int access, deny; 12471da177e4SLinus Torvalds 12481da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12491da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12501da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12511da177e4SLinus Torvalds return 0; 12521da177e4SLinus Torvalds return 1; 12531da177e4SLinus Torvalds } 12541da177e4SLinus Torvalds 12551da177e4SLinus Torvalds /* 12561da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12571da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12581da177e4SLinus Torvalds */ 1259b37ad28bSAl Viro static __be32 12601da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12611da177e4SLinus Torvalds { 12621da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12631da177e4SLinus Torvalds struct nfs4_file *fp; 12641da177e4SLinus Torvalds struct nfs4_stateid *stp; 1265b37ad28bSAl Viro __be32 ret; 12661da177e4SLinus Torvalds 12671da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds fp = find_file(ino); 127013cd2184SNeilBrown if (!fp) 127113cd2184SNeilBrown return nfs_ok; 1272b700949bSNeilBrown ret = nfserr_locked; 12731da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12748beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12751da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12761da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 127713cd2184SNeilBrown goto out; 12781da177e4SLinus Torvalds } 127913cd2184SNeilBrown ret = nfs_ok; 128013cd2184SNeilBrown out: 128113cd2184SNeilBrown put_nfs4_file(fp); 128213cd2184SNeilBrown return ret; 12831da177e4SLinus Torvalds } 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds static inline void 12861da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 12871da177e4SLinus Torvalds { 12881da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1289aceaf78dSDave Hansen drop_file_write_access(filp); 12901da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 12911da177e4SLinus Torvalds } 12921da177e4SLinus Torvalds } 12931da177e4SLinus Torvalds 12941da177e4SLinus Torvalds /* 12951da177e4SLinus Torvalds * Recall a delegation 12961da177e4SLinus Torvalds */ 12971da177e4SLinus Torvalds static int 12981da177e4SLinus Torvalds do_recall(void *__dp) 12991da177e4SLinus Torvalds { 13001da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13011da177e4SLinus Torvalds 130247f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 13031da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13041da177e4SLinus Torvalds return 0; 13051da177e4SLinus Torvalds } 13061da177e4SLinus Torvalds 13071da177e4SLinus Torvalds /* 13081da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13091da177e4SLinus Torvalds * by the lease (file_lock) 13101da177e4SLinus Torvalds * 13111da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13121da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13131da177e4SLinus Torvalds * lease. 13141da177e4SLinus Torvalds */ 13151da177e4SLinus Torvalds static 13161da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13171da177e4SLinus Torvalds { 13181da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13191da177e4SLinus Torvalds struct task_struct *t; 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13221da177e4SLinus Torvalds if (!dp) 13231da177e4SLinus Torvalds return; 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13261da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13271da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13281da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13291da177e4SLinus Torvalds * it's safe to take a reference: */ 13301da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1331cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13321da177e4SLinus Torvalds 13331da177e4SLinus Torvalds spin_lock(&recall_lock); 13341da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13351da177e4SLinus Torvalds spin_unlock(&recall_lock); 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13381da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13391da177e4SLinus Torvalds 13400272e1fdSJ. Bruce Fields /* 13410272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13420272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13430272e1fdSJ. Bruce Fields * in time. 13440272e1fdSJ. Bruce Fields */ 13450272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13481da177e4SLinus Torvalds if (IS_ERR(t)) { 13491da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13501da177e4SLinus Torvalds 13511da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13521da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13531da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1354cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13551da177e4SLinus Torvalds nfs4_put_delegation(dp); 13561da177e4SLinus Torvalds } 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds /* 13601da177e4SLinus Torvalds * The file_lock is being reapd. 13611da177e4SLinus Torvalds * 13621da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13631da177e4SLinus Torvalds */ 13641da177e4SLinus Torvalds static 13651da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13661da177e4SLinus Torvalds { 13671da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13721da177e4SLinus Torvalds return; 13731da177e4SLinus Torvalds dp->dl_flock = NULL; 13741da177e4SLinus Torvalds } 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds /* 13771da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13781da177e4SLinus Torvalds * 1379a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 13801da177e4SLinus Torvalds */ 13811da177e4SLinus Torvalds static 13821da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 13871da177e4SLinus Torvalds if (!dp) 13881da177e4SLinus Torvalds return; 13891da177e4SLinus Torvalds dp->dl_flock = new; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds /* 1393a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 13941da177e4SLinus Torvalds */ 13951da177e4SLinus Torvalds static 13961da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 13971da177e4SLinus Torvalds { 13981da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 13991da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14001da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14011da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14021da177e4SLinus Torvalds 14031da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14041da177e4SLinus Torvalds return 0; 14051da177e4SLinus Torvalds 14061da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14071da177e4SLinus Torvalds } 14081da177e4SLinus Torvalds 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds static 14111da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14121da177e4SLinus Torvalds { 14131da177e4SLinus Torvalds if (arg & F_UNLCK) 14141da177e4SLinus Torvalds return lease_modify(onlist, arg); 14151da177e4SLinus Torvalds else 14161da177e4SLinus Torvalds return -EAGAIN; 14171da177e4SLinus Torvalds } 14181da177e4SLinus Torvalds 1419fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14201da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14211da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14221da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14231da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14241da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14251da177e4SLinus Torvalds }; 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds 1428b37ad28bSAl Viro __be32 14291da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14301da177e4SLinus Torvalds { 14311da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14321da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14331da177e4SLinus Torvalds unsigned int strhashval; 14341da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14370f442aa2SJ. Bruce Fields return nfserr_inval; 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14401da177e4SLinus Torvalds return nfserr_stale_clientid; 14411da177e4SLinus Torvalds 14421da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14431da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14441da177e4SLinus Torvalds open->op_stateowner = sop; 14450f442aa2SJ. Bruce Fields if (!sop) { 14460f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14470f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14480f442aa2SJ. Bruce Fields if (clp == NULL) 14490f442aa2SJ. Bruce Fields return nfserr_expired; 14500f442aa2SJ. Bruce Fields goto renew; 14510f442aa2SJ. Bruce Fields } 1452ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14530f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1454ae8b6253SJ. Bruce Fields clp = sop->so_client; 1455f044ff83SJ. Bruce Fields release_openowner(sop); 14560f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1457ae8b6253SJ. Bruce Fields goto renew; 14580f442aa2SJ. Bruce Fields } 14590f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14601da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1461a90b061cSAl Viro return nfserr_replay_me; 14621da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14631da177e4SLinus Torvalds * that we don't even have replay data saved! 14641da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14651da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14661da177e4SLinus Torvalds * fail again for the same reason. 14671da177e4SLinus Torvalds */ 14680f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14691da177e4SLinus Torvalds goto renew; 14701da177e4SLinus Torvalds } 14710f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14720f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14730f442aa2SJ. Bruce Fields renew: 14740f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14751da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14761da177e4SLinus Torvalds if (sop == NULL) 14770f442aa2SJ. Bruce Fields return nfserr_resource; 14781da177e4SLinus Torvalds open->op_stateowner = sop; 14790f442aa2SJ. Bruce Fields } 14800f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14811da177e4SLinus Torvalds renew_client(sop->so_client); 14820f442aa2SJ. Bruce Fields return nfs_ok; 14831da177e4SLinus Torvalds } 14841da177e4SLinus Torvalds 1485b37ad28bSAl Viro static inline __be32 14864a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 14874a6e43e6SNeilBrown { 14884a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 14894a6e43e6SNeilBrown return nfserr_openmode; 14904a6e43e6SNeilBrown else 14914a6e43e6SNeilBrown return nfs_ok; 14924a6e43e6SNeilBrown } 14934a6e43e6SNeilBrown 149452f4fb43SNeilBrown static struct nfs4_delegation * 149552f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 149652f4fb43SNeilBrown { 149752f4fb43SNeilBrown struct nfs4_delegation *dp; 149852f4fb43SNeilBrown 1499ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 150052f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 150152f4fb43SNeilBrown return dp; 150252f4fb43SNeilBrown } 150352f4fb43SNeilBrown return NULL; 150452f4fb43SNeilBrown } 150552f4fb43SNeilBrown 1506b37ad28bSAl Viro static __be32 1507567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1508567d9829SNeilBrown struct nfs4_delegation **dp) 1509567d9829SNeilBrown { 1510567d9829SNeilBrown int flags; 1511b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1512567d9829SNeilBrown 1513567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1514567d9829SNeilBrown if (*dp == NULL) 1515c44c5eebSNeilBrown goto out; 1516567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1517567d9829SNeilBrown RD_STATE : WR_STATE; 1518567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1519567d9829SNeilBrown if (status) 1520567d9829SNeilBrown *dp = NULL; 1521c44c5eebSNeilBrown out: 1522c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1523c44c5eebSNeilBrown return nfs_ok; 1524c44c5eebSNeilBrown if (status) 1525c44c5eebSNeilBrown return status; 1526c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1527c44c5eebSNeilBrown return nfs_ok; 1528567d9829SNeilBrown } 1529567d9829SNeilBrown 1530b37ad28bSAl Viro static __be32 15311da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15321da177e4SLinus Torvalds { 15331da177e4SLinus Torvalds struct nfs4_stateid *local; 1534b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15351da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15361da177e4SLinus Torvalds 15378beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15381da177e4SLinus Torvalds /* ignore lock owners */ 15391da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15401da177e4SLinus Torvalds continue; 15411da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15421da177e4SLinus Torvalds if (local->st_stateowner == sop) 15431da177e4SLinus Torvalds *stpp = local; 15441da177e4SLinus Torvalds /* check for conflicting share reservations */ 15451da177e4SLinus Torvalds if (!test_share(local, open)) 15461da177e4SLinus Torvalds goto out; 15471da177e4SLinus Torvalds } 15481da177e4SLinus Torvalds status = 0; 15491da177e4SLinus Torvalds out: 15501da177e4SLinus Torvalds return status; 15511da177e4SLinus Torvalds } 15521da177e4SLinus Torvalds 15535ac049acSNeilBrown static inline struct nfs4_stateid * 15545ac049acSNeilBrown nfs4_alloc_stateid(void) 15555ac049acSNeilBrown { 15565ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15575ac049acSNeilBrown } 15585ac049acSNeilBrown 1559b37ad28bSAl Viro static __be32 15601da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1561567d9829SNeilBrown struct nfs4_delegation *dp, 15621da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15631da177e4SLinus Torvalds { 15641da177e4SLinus Torvalds struct nfs4_stateid *stp; 15651da177e4SLinus Torvalds 15665ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15671da177e4SLinus Torvalds if (stp == NULL) 15681da177e4SLinus Torvalds return nfserr_resource; 15691da177e4SLinus Torvalds 1570567d9829SNeilBrown if (dp) { 1571567d9829SNeilBrown get_file(dp->dl_vfs_file); 1572567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1573567d9829SNeilBrown } else { 1574b37ad28bSAl Viro __be32 status; 1575567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1576567d9829SNeilBrown &stp->st_vfs_file); 15771da177e4SLinus Torvalds if (status) { 15781da177e4SLinus Torvalds if (status == nfserr_dropit) 15791da177e4SLinus Torvalds status = nfserr_jukebox; 15805ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15811da177e4SLinus Torvalds return status; 15821da177e4SLinus Torvalds } 1583567d9829SNeilBrown } 15841da177e4SLinus Torvalds *stpp = stp; 15851da177e4SLinus Torvalds return 0; 15861da177e4SLinus Torvalds } 15871da177e4SLinus Torvalds 1588b37ad28bSAl Viro static inline __be32 15891da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 15901da177e4SLinus Torvalds struct nfsd4_open *open) 15911da177e4SLinus Torvalds { 15921da177e4SLinus Torvalds struct iattr iattr = { 15931da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 15941da177e4SLinus Torvalds .ia_size = 0, 15951da177e4SLinus Torvalds }; 15961da177e4SLinus Torvalds if (!open->op_truncate) 15971da177e4SLinus Torvalds return 0; 15981da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 15999246585aSAl Viro return nfserr_inval; 16001da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16011da177e4SLinus Torvalds } 16021da177e4SLinus Torvalds 1603b37ad28bSAl Viro static __be32 16041da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16051da177e4SLinus Torvalds { 16061da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16077eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 16086c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1609b37ad28bSAl Viro __be32 status; 16101da177e4SLinus Torvalds 16111da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16126c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16136c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16141da177e4SLinus Torvalds 16156c26d08fSJ. Bruce Fields if (new_writer) { 1616b37ad28bSAl Viro int err = get_write_access(inode); 1617b37ad28bSAl Viro if (err) 1618b37ad28bSAl Viro return nfserrno(err); 1619e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 1620e518f056SBenny Halevy if (err) 1621e518f056SBenny Halevy return nfserrno(err); 1622e518f056SBenny Halevy file_take_write(filp); 16236c26d08fSJ. Bruce Fields } 16241da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16251da177e4SLinus Torvalds if (status) { 16266c26d08fSJ. Bruce Fields if (new_writer) 16271da177e4SLinus Torvalds put_write_access(inode); 16281da177e4SLinus Torvalds return status; 16291da177e4SLinus Torvalds } 16301da177e4SLinus Torvalds /* remember the open */ 16316c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 1632b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 1633b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16341da177e4SLinus Torvalds 16351da177e4SLinus Torvalds return nfs_ok; 16361da177e4SLinus Torvalds } 16371da177e4SLinus Torvalds 16381da177e4SLinus Torvalds 16391da177e4SLinus Torvalds static void 164037515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16411da177e4SLinus Torvalds { 16421da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1643c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds /* 16471da177e4SLinus Torvalds * Attempt to hand out a delegation. 16481da177e4SLinus Torvalds */ 16491da177e4SLinus Torvalds static void 16501da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16511da177e4SLinus Torvalds { 16521da177e4SLinus Torvalds struct nfs4_delegation *dp; 16531da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16541da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16551da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16561da177e4SLinus Torvalds int status, flag = 0; 16571da177e4SLinus Torvalds 16581da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16597b190fecSNeilBrown open->op_recall = 0; 16607b190fecSNeilBrown switch (open->op_claim_type) { 16617b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16627b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16637b190fecSNeilBrown open->op_recall = 1; 16647b190fecSNeilBrown flag = open->op_delegate_type; 16657b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16661da177e4SLinus Torvalds goto out; 16677b190fecSNeilBrown break; 16687b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16697b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16707b190fecSNeilBrown * had the chance to reclaim theirs.... */ 1671af558e33SJ. Bruce Fields if (locks_in_grace()) 16727b190fecSNeilBrown goto out; 16737b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16747b190fecSNeilBrown goto out; 16751da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16761da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16771da177e4SLinus Torvalds else 16781da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16797b190fecSNeilBrown break; 16807b190fecSNeilBrown default: 16817b190fecSNeilBrown goto out; 16827b190fecSNeilBrown } 16831da177e4SLinus Torvalds 16841da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16851da177e4SLinus Torvalds if (dp == NULL) { 16861da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16871da177e4SLinus Torvalds goto out; 16881da177e4SLinus Torvalds } 16891da177e4SLinus Torvalds locks_init_lock(&fl); 16901da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 16911da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 16929167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 16931da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 16941da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 16951da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 16961da177e4SLinus Torvalds fl.fl_pid = current->tgid; 16971da177e4SLinus Torvalds 1698a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 16991da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17001da177e4SLinus Torvalds */ 17019167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 17021da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1703c907132dSNeilBrown unhash_delegation(dp); 17041da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17051da177e4SLinus Torvalds goto out; 17061da177e4SLinus Torvalds } 17071da177e4SLinus Torvalds 17081da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17091da177e4SLinus Torvalds 17101da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17111da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17121da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17131da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17141da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17151da177e4SLinus Torvalds out: 17167b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17177b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17187b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17192fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 17201da177e4SLinus Torvalds open->op_delegate_type = flag; 17211da177e4SLinus Torvalds } 17221da177e4SLinus Torvalds 17231da177e4SLinus Torvalds /* 17241da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17251da177e4SLinus Torvalds */ 1726b37ad28bSAl Viro __be32 17271da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17281da177e4SLinus Torvalds { 17291da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17301da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17311da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1732567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1733b37ad28bSAl Viro __be32 status; 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds status = nfserr_inval; 1736ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1737ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17381da177e4SLinus Torvalds goto out; 17391da177e4SLinus Torvalds /* 17401da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17411da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17421da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17431da177e4SLinus Torvalds */ 17441da177e4SLinus Torvalds fp = find_file(ino); 17451da177e4SLinus Torvalds if (fp) { 17461da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17471da177e4SLinus Torvalds goto out; 1748c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1749c44c5eebSNeilBrown if (status) 1750c44c5eebSNeilBrown goto out; 17511da177e4SLinus Torvalds } else { 1752c44c5eebSNeilBrown status = nfserr_bad_stateid; 1753c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1754c44c5eebSNeilBrown goto out; 17551da177e4SLinus Torvalds status = nfserr_resource; 17561da177e4SLinus Torvalds fp = alloc_init_file(ino); 17571da177e4SLinus Torvalds if (fp == NULL) 17581da177e4SLinus Torvalds goto out; 17591da177e4SLinus Torvalds } 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds /* 17621da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17631da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17641da177e4SLinus Torvalds */ 17651da177e4SLinus Torvalds if (stp) { 17661da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17671da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17681da177e4SLinus Torvalds if (status) 17691da177e4SLinus Torvalds goto out; 1770444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17711da177e4SLinus Torvalds } else { 17721da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17731da177e4SLinus Torvalds int flags = 0; 17749ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17758837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 17761da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17778837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 1778567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1779567d9829SNeilBrown if (status) 17801da177e4SLinus Torvalds goto out; 17811da177e4SLinus Torvalds init_stateid(stp, fp, open); 17821da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17831da177e4SLinus Torvalds if (status) { 17842283963fSJ. Bruce Fields release_open_stateid(stp); 17851da177e4SLinus Torvalds goto out; 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds /* 17911da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 17921da177e4SLinus Torvalds * OPEN succeeds even if we fail. 17931da177e4SLinus Torvalds */ 17941da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds status = nfs_ok; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 17991da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18001da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18011da177e4SLinus Torvalds out: 180213cd2184SNeilBrown if (fp) 180313cd2184SNeilBrown put_nfs4_file(fp); 180437515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 180537515177SNeilBrown nfs4_set_claim_prev(open); 18061da177e4SLinus Torvalds /* 18071da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18081da177e4SLinus Torvalds */ 18091da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18101da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18111da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds return status; 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds 1816b37ad28bSAl Viro __be32 1817b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1818b591480bSJ.Bruce Fields clientid_t *clid) 18191da177e4SLinus Torvalds { 18201da177e4SLinus Torvalds struct nfs4_client *clp; 1821b37ad28bSAl Viro __be32 status; 18221da177e4SLinus Torvalds 18231da177e4SLinus Torvalds nfs4_lock_state(); 18241da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18251da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18261da177e4SLinus Torvalds status = nfserr_stale_clientid; 18271da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18281da177e4SLinus Torvalds goto out; 18291da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18301da177e4SLinus Torvalds status = nfserr_expired; 18311da177e4SLinus Torvalds if (clp == NULL) { 18321da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18331da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18341da177e4SLinus Torvalds goto out; 18351da177e4SLinus Torvalds } 18361da177e4SLinus Torvalds renew_client(clp); 18371da177e4SLinus Torvalds status = nfserr_cb_path_down; 1838ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18391da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18401da177e4SLinus Torvalds goto out; 18411da177e4SLinus Torvalds status = nfs_ok; 18421da177e4SLinus Torvalds out: 18431da177e4SLinus Torvalds nfs4_unlock_state(); 18441da177e4SLinus Torvalds return status; 18451da177e4SLinus Torvalds } 18461da177e4SLinus Torvalds 1847af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 1848af558e33SJ. Bruce Fields }; 1849af558e33SJ. Bruce Fields 1850a76b4319SNeilBrown static void 1851af558e33SJ. Bruce Fields nfsd4_end_grace(void) 1852a76b4319SNeilBrown { 1853a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1854c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1855af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 1856a76b4319SNeilBrown } 1857a76b4319SNeilBrown 1858fd39ca9aSNeilBrown static time_t 18591da177e4SLinus Torvalds nfs4_laundromat(void) 18601da177e4SLinus Torvalds { 18611da177e4SLinus Torvalds struct nfs4_client *clp; 18621da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18631da177e4SLinus Torvalds struct nfs4_delegation *dp; 18641da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18651da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18661da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18671da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18681da177e4SLinus Torvalds 18691da177e4SLinus Torvalds nfs4_lock_state(); 18701da177e4SLinus Torvalds 18711da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1872af558e33SJ. Bruce Fields if (locks_in_grace()) 1873af558e33SJ. Bruce Fields nfsd4_end_grace(); 18741da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18751da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18761da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18771da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18781da177e4SLinus Torvalds if (clientid_val > t) 18791da177e4SLinus Torvalds clientid_val = t; 18801da177e4SLinus Torvalds break; 18811da177e4SLinus Torvalds } 18821da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18831da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1884c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18851da177e4SLinus Torvalds expire_client(clp); 18861da177e4SLinus Torvalds } 18871da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 18881da177e4SLinus Torvalds spin_lock(&recall_lock); 18891da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 18901da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18911da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 18921da177e4SLinus Torvalds u = dp->dl_time - cutoff; 18931da177e4SLinus Torvalds if (test_val > u) 18941da177e4SLinus Torvalds test_val = u; 18951da177e4SLinus Torvalds break; 18961da177e4SLinus Torvalds } 18971da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 18981da177e4SLinus Torvalds dp, dp->dl_flock); 18991da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19001da177e4SLinus Torvalds } 19011da177e4SLinus Torvalds spin_unlock(&recall_lock); 19021da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19031da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19041da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19051da177e4SLinus Torvalds unhash_delegation(dp); 19061da177e4SLinus Torvalds } 19071da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19081da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19091da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19101da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19111da177e4SLinus Torvalds u = sop->so_time - cutoff; 19121da177e4SLinus Torvalds if (test_val > u) 19131da177e4SLinus Torvalds test_val = u; 19141da177e4SLinus Torvalds break; 19151da177e4SLinus Torvalds } 19161da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19171da177e4SLinus Torvalds sop->so_id); 1918f044ff83SJ. Bruce Fields release_openowner(sop); 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19211da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19221da177e4SLinus Torvalds nfs4_unlock_state(); 19231da177e4SLinus Torvalds return clientid_val; 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds 1926a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 1927a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 1928a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 1929a254b246SHarvey Harrison 1930a254b246SHarvey Harrison static void 1931c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19321da177e4SLinus Torvalds { 19331da177e4SLinus Torvalds time_t t; 19341da177e4SLinus Torvalds 19351da177e4SLinus Torvalds t = nfs4_laundromat(); 19361da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 193758da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds 1940fd39ca9aSNeilBrown static struct nfs4_stateowner * 1941f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1942f8816512SNeilBrown { 19431da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19441da177e4SLinus Torvalds 19451da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19461da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19471da177e4SLinus Torvalds if (local->so_id == st_id) 19481da177e4SLinus Torvalds return local; 19491da177e4SLinus Torvalds } 19501da177e4SLinus Torvalds } 19511da177e4SLinus Torvalds return NULL; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds static inline int 19551da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19561da177e4SLinus Torvalds { 19577eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds 19601da177e4SLinus Torvalds static int 19611da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19621da177e4SLinus Torvalds { 19631da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19641da177e4SLinus Torvalds return 0; 1965849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19661da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19671da177e4SLinus Torvalds stateid->si_generation); 19681da177e4SLinus Torvalds return 1; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds 19711da177e4SLinus Torvalds static inline int 19721da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19731da177e4SLinus Torvalds { 19741da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19751da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19761da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19771da177e4SLinus Torvalds } 19781da177e4SLinus Torvalds 19791da177e4SLinus Torvalds static inline int 19801da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19811da177e4SLinus Torvalds { 19821da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19831da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19841da177e4SLinus Torvalds } 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds static 1987b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19881da177e4SLinus Torvalds { 1989b37ad28bSAl Viro __be32 status = nfserr_openmode; 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 19921da177e4SLinus Torvalds goto out; 19931da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 19941da177e4SLinus Torvalds goto out; 19951da177e4SLinus Torvalds status = nfs_ok; 19961da177e4SLinus Torvalds out: 19971da177e4SLinus Torvalds return status; 19981da177e4SLinus Torvalds } 19991da177e4SLinus Torvalds 2000b37ad28bSAl Viro static inline __be32 20011da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20021da177e4SLinus Torvalds { 20031da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20041da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20051da177e4SLinus Torvalds return nfserr_bad_stateid; 20061da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20071da177e4SLinus Torvalds return nfs_ok; 2008af558e33SJ. Bruce Fields else if (locks_in_grace()) { 20091da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20101da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20111da177e4SLinus Torvalds return nfserr_grace; 20121da177e4SLinus Torvalds } else if (flags & WR_STATE) 20131da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20141da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20151da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20161da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20171da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20181da177e4SLinus Torvalds } 20191da177e4SLinus Torvalds 20201da177e4SLinus Torvalds /* 20211da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20221da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20231da177e4SLinus Torvalds */ 20241da177e4SLinus Torvalds static inline int 20251da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20261da177e4SLinus Torvalds { 2027af558e33SJ. Bruce Fields return locks_in_grace() && (flags & (RD_STATE | WR_STATE)) 2028a16877caSPavel Emelyanov && mandatory_lock(inode); 20291da177e4SLinus Torvalds } 20301da177e4SLinus Torvalds 20310836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 20320836f587SJ. Bruce Fields { 20330836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 20340836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 20350836f587SJ. Bruce Fields return nfserr_bad_stateid; 20360836f587SJ. Bruce Fields /* 20370836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 20380836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 20390836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 20400836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 20410836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 20420836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 20430836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 20440836f587SJ. Bruce Fields * will just have to retry the IO: 20450836f587SJ. Bruce Fields */ 20460836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 20470836f587SJ. Bruce Fields return nfserr_old_stateid; 20480836f587SJ. Bruce Fields return nfs_ok; 20490836f587SJ. Bruce Fields } 20500836f587SJ. Bruce Fields 20511da177e4SLinus Torvalds /* 20521da177e4SLinus Torvalds * Checks for stateid operations 20531da177e4SLinus Torvalds */ 2054b37ad28bSAl Viro __be32 20551da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20561da177e4SLinus Torvalds { 20571da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20581da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20591da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2060b37ad28bSAl Viro __be32 status; 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds if (filpp) 20631da177e4SLinus Torvalds *filpp = NULL; 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20661da177e4SLinus Torvalds return nfserr_grace; 20671da177e4SLinus Torvalds 20681da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20691da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20701da177e4SLinus Torvalds 20711da177e4SLinus Torvalds status = nfserr_stale_stateid; 20721da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20731da177e4SLinus Torvalds goto out; 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds status = nfserr_bad_stateid; 20761da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 2077a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 2078819a8f53SJ. Bruce Fields if (!dp) 20791da177e4SLinus Torvalds goto out; 2080fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 20810c2a498fSJ. Bruce Fields if (status) 20820c2a498fSJ. Bruce Fields goto out; 2083dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2084dc9bf700SJ. Bruce Fields if (status) 2085dc9bf700SJ. Bruce Fields goto out; 2086dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2087dc9bf700SJ. Bruce Fields if (flags & DELEG_RET) 2088dc9bf700SJ. Bruce Fields unhash_delegation(dp); 2089dc9bf700SJ. Bruce Fields if (filpp) 2090dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 20911da177e4SLinus Torvalds } else { /* open or lock stateid */ 2092a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 2093819a8f53SJ. Bruce Fields if (!stp) 20941da177e4SLinus Torvalds goto out; 20951da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20961da177e4SLinus Torvalds goto out; 20971da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20981da177e4SLinus Torvalds goto out; 2099fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 21000836f587SJ. Bruce Fields if (status) 21011da177e4SLinus Torvalds goto out; 2102a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2103a4455be0SJ. Bruce Fields if (status) 21041da177e4SLinus Torvalds goto out; 21051da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21061da177e4SLinus Torvalds if (filpp) 21071da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21081da177e4SLinus Torvalds } 21091da177e4SLinus Torvalds status = nfs_ok; 21101da177e4SLinus Torvalds out: 21111da177e4SLinus Torvalds return status; 21121da177e4SLinus Torvalds } 21131da177e4SLinus Torvalds 21144c4cd222SNeilBrown static inline int 21154c4cd222SNeilBrown setlkflg (int type) 21164c4cd222SNeilBrown { 21174c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21184c4cd222SNeilBrown RD_STATE : WR_STATE; 21194c4cd222SNeilBrown } 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds /* 21221da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21231da177e4SLinus Torvalds */ 2124b37ad28bSAl Viro static __be32 21254c4cd222SNeilBrown 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) 21261da177e4SLinus Torvalds { 21271da177e4SLinus Torvalds struct nfs4_stateid *stp; 21281da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21290836f587SJ. Bruce Fields __be32 status; 21301da177e4SLinus Torvalds 21311da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21321da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21331da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21341da177e4SLinus Torvalds stateid->si_generation); 21351da177e4SLinus Torvalds 21361da177e4SLinus Torvalds *stpp = NULL; 21371da177e4SLinus Torvalds *sopp = NULL; 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21402fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21413a4f98bbSNeilBrown return nfserr_bad_stateid; 21421da177e4SLinus Torvalds } 21431da177e4SLinus Torvalds 21441da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21453a4f98bbSNeilBrown return nfserr_stale_stateid; 21461da177e4SLinus Torvalds /* 21471da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21481da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21491da177e4SLinus Torvalds * number is incorrect. 21501da177e4SLinus Torvalds */ 2151f8816512SNeilBrown stp = find_stateid(stateid, flags); 2152f8816512SNeilBrown if (stp == NULL) { 2153f8816512SNeilBrown /* 2154f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2155f8816512SNeilBrown * a replayed close: 2156f8816512SNeilBrown */ 2157f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2158f8816512SNeilBrown if (sop == NULL) 2159f8816512SNeilBrown return nfserr_bad_stateid; 2160f8816512SNeilBrown *sopp = sop; 2161f8816512SNeilBrown goto check_replay; 2162f8816512SNeilBrown } 21631da177e4SLinus Torvalds 216439325bd0SJ. Bruce Fields *stpp = stp; 216539325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 216639325bd0SJ. Bruce Fields 21674c4cd222SNeilBrown if (lock) { 21684c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21691da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21704c4cd222SNeilBrown int lkflg = 0; 2171b37ad28bSAl Viro __be32 status; 21721da177e4SLinus Torvalds 21734c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21744c4cd222SNeilBrown 21754c4cd222SNeilBrown if (lock->lk_is_new) { 21761da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21773a4f98bbSNeilBrown return nfserr_bad_stateid; 2178599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 21793a4f98bbSNeilBrown return nfserr_bad_stateid; 21804c4cd222SNeilBrown /* stp is the open stateid */ 21814c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21824c4cd222SNeilBrown if (status) 21834c4cd222SNeilBrown return status; 21844c4cd222SNeilBrown } else { 21854c4cd222SNeilBrown /* stp is the lock stateid */ 21864c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21874c4cd222SNeilBrown if (status) 21884c4cd222SNeilBrown return status; 21894c4cd222SNeilBrown } 21901da177e4SLinus Torvalds } 21911da177e4SLinus Torvalds 2192f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 21932fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21943a4f98bbSNeilBrown return nfserr_bad_stateid; 21951da177e4SLinus Torvalds } 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvalds /* 21981da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 21991da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22001da177e4SLinus Torvalds * generation number wraparound. 22011da177e4SLinus Torvalds */ 2202bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22031da177e4SLinus Torvalds goto check_replay; 22041da177e4SLinus Torvalds 22053a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22062fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 22073a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22083a4f98bbSNeilBrown return nfserr_bad_stateid; 22091da177e4SLinus Torvalds } 22103a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22112fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 22123a4f98bbSNeilBrown " confirmed yet!\n"); 22133a4f98bbSNeilBrown return nfserr_bad_stateid; 22141da177e4SLinus Torvalds } 22150836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 22160836f587SJ. Bruce Fields if (status) 22170836f587SJ. Bruce Fields return status; 221852fd004eSNeilBrown renew_client(sop->so_client); 22193a4f98bbSNeilBrown return nfs_ok; 22201da177e4SLinus Torvalds 22211da177e4SLinus Torvalds check_replay: 2222bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2223849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22241da177e4SLinus Torvalds /* indicate replay to calling function */ 2225a90b061cSAl Viro return nfserr_replay_me; 22261da177e4SLinus Torvalds } 22272fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22283a4f98bbSNeilBrown sop->so_seqid, seqid); 22293a4f98bbSNeilBrown *sopp = NULL; 22303a4f98bbSNeilBrown return nfserr_bad_seqid; 22311da177e4SLinus Torvalds } 22321da177e4SLinus Torvalds 2233b37ad28bSAl Viro __be32 2234ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2235a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22361da177e4SLinus Torvalds { 2237b37ad28bSAl Viro __be32 status; 22381da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22391da177e4SLinus Torvalds struct nfs4_stateid *stp; 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2242ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2243ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22441da177e4SLinus Torvalds 2245ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2246a8cddc5dSJ. Bruce Fields if (status) 2247a8cddc5dSJ. Bruce Fields return status; 22481da177e4SLinus Torvalds 22491da177e4SLinus Torvalds nfs4_lock_state(); 22501da177e4SLinus Torvalds 2251ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2252ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2253f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 22541da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22551da177e4SLinus Torvalds goto out; 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds sop = oc->oc_stateowner; 22581da177e4SLinus Torvalds sop->so_confirmed = 1; 22591da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22601da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22611da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22621da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22631da177e4SLinus Torvalds stp->st_stateid.si_boot, 22641da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22651da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22661da177e4SLinus Torvalds stp->st_stateid.si_generation); 2267c7b9a459SNeilBrown 2268c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22691da177e4SLinus Torvalds out: 2270f2327d9aSNeil Brown if (oc->oc_stateowner) { 22711da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2272a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2273f2327d9aSNeil Brown } 22741da177e4SLinus Torvalds nfs4_unlock_state(); 22751da177e4SLinus Torvalds return status; 22761da177e4SLinus Torvalds } 22771da177e4SLinus Torvalds 22781da177e4SLinus Torvalds 22791da177e4SLinus Torvalds /* 22801da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22811da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22821da177e4SLinus Torvalds */ 22831da177e4SLinus Torvalds static void 22841da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22851da177e4SLinus Torvalds { 22861da177e4SLinus Torvalds int i; 22871da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22881da177e4SLinus Torvalds if ((i & access) != i) 22891da177e4SLinus Torvalds __clear_bit(i, bmap); 22901da177e4SLinus Torvalds } 22911da177e4SLinus Torvalds } 22921da177e4SLinus Torvalds 22931da177e4SLinus Torvalds static void 22941da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 22951da177e4SLinus Torvalds { 22961da177e4SLinus Torvalds int i; 22971da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22981da177e4SLinus Torvalds if ((i & deny) != i) 22991da177e4SLinus Torvalds __clear_bit(i, bmap); 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds 2303b37ad28bSAl Viro __be32 2304ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2305ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2306a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 23071da177e4SLinus Torvalds { 2308b37ad28bSAl Viro __be32 status; 23091da177e4SLinus Torvalds struct nfs4_stateid *stp; 23101da177e4SLinus Torvalds unsigned int share_access; 23111da177e4SLinus Torvalds 23121da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2313ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2314ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23151da177e4SLinus Torvalds 2316ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2317ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23181da177e4SLinus Torvalds return nfserr_inval; 23191da177e4SLinus Torvalds 23201da177e4SLinus Torvalds nfs4_lock_state(); 2321ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2322ca364317SJ.Bruce Fields od->od_seqid, 23231da177e4SLinus Torvalds &od->od_stateid, 2324f3362737SJ. Bruce Fields OPEN_STATE, 23251da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23261da177e4SLinus Torvalds goto out; 23271da177e4SLinus Torvalds 23281da177e4SLinus Torvalds status = nfserr_inval; 23291da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23301da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23311da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23321da177e4SLinus Torvalds goto out; 23331da177e4SLinus Torvalds } 23341da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23351da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23361da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23371da177e4SLinus Torvalds goto out; 23381da177e4SLinus Torvalds } 23391da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23401da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23411da177e4SLinus Torvalds share_access & ~od->od_share_access); 23421da177e4SLinus Torvalds 23431da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23441da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23451da177e4SLinus Torvalds 23461da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23471da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23481da177e4SLinus Torvalds status = nfs_ok; 23491da177e4SLinus Torvalds out: 2350f2327d9aSNeil Brown if (od->od_stateowner) { 23511da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2352a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2353f2327d9aSNeil Brown } 23541da177e4SLinus Torvalds nfs4_unlock_state(); 23551da177e4SLinus Torvalds return status; 23561da177e4SLinus Torvalds } 23571da177e4SLinus Torvalds 23581da177e4SLinus Torvalds /* 23591da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23601da177e4SLinus Torvalds */ 2361b37ad28bSAl Viro __be32 2362ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2363a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23641da177e4SLinus Torvalds { 2365b37ad28bSAl Viro __be32 status; 23661da177e4SLinus Torvalds struct nfs4_stateid *stp; 23671da177e4SLinus Torvalds 23681da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2369ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2370ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23711da177e4SLinus Torvalds 23721da177e4SLinus Torvalds nfs4_lock_state(); 23731da177e4SLinus Torvalds /* check close_lru for replay */ 2374ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2375ca364317SJ.Bruce Fields close->cl_seqid, 23761da177e4SLinus Torvalds &close->cl_stateid, 2377f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 23781da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23791da177e4SLinus Torvalds goto out; 23801da177e4SLinus Torvalds status = nfs_ok; 23811da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23821da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23831da177e4SLinus Torvalds 238404ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 23852283963fSJ. Bruce Fields release_open_stateid(stp); 238604ef5954SJ. Bruce Fields 238704ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 238804ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 238904ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 239004ef5954SJ. Bruce Fields */ 239104ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 239204ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23931da177e4SLinus Torvalds out: 2394f2327d9aSNeil Brown if (close->cl_stateowner) { 23951da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2396a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2397f2327d9aSNeil Brown } 23981da177e4SLinus Torvalds nfs4_unlock_state(); 23991da177e4SLinus Torvalds return status; 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds 2402b37ad28bSAl Viro __be32 2403ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2404ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 24051da177e4SLinus Torvalds { 2406b37ad28bSAl Viro __be32 status; 24071da177e4SLinus Torvalds 2408ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 24091da177e4SLinus Torvalds goto out; 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds nfs4_lock_state(); 2412ca364317SJ.Bruce Fields status = nfs4_preprocess_stateid_op(&cstate->current_fh, 2413ca364317SJ.Bruce Fields &dr->dr_stateid, DELEG_RET, NULL); 24141da177e4SLinus Torvalds nfs4_unlock_state(); 24151da177e4SLinus Torvalds out: 24161da177e4SLinus Torvalds return status; 24171da177e4SLinus Torvalds } 24181da177e4SLinus Torvalds 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds /* 24211da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24221da177e4SLinus Torvalds */ 24231da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24241da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24251da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24261da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24271da177e4SLinus Torvalds 242887df4de8SBenny Halevy static inline u64 242987df4de8SBenny Halevy end_offset(u64 start, u64 len) 243087df4de8SBenny Halevy { 243187df4de8SBenny Halevy u64 end; 243287df4de8SBenny Halevy 243387df4de8SBenny Halevy end = start + len; 243487df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 243587df4de8SBenny Halevy } 243687df4de8SBenny Halevy 243787df4de8SBenny Halevy /* last octet in a range */ 243887df4de8SBenny Halevy static inline u64 243987df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 244087df4de8SBenny Halevy { 244187df4de8SBenny Halevy u64 end; 244287df4de8SBenny Halevy 244387df4de8SBenny Halevy BUG_ON(!len); 244487df4de8SBenny Halevy end = start + len; 244587df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 244687df4de8SBenny Halevy } 244787df4de8SBenny Halevy 24481da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24491da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24501da177e4SLinus Torvalds 24511da177e4SLinus Torvalds static inline unsigned int 24521da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24531da177e4SLinus Torvalds struct xdr_netobj *ownername) 24541da177e4SLinus Torvalds { 24551da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24561da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24571da177e4SLinus Torvalds & LOCK_HASH_MASK; 24581da177e4SLinus Torvalds } 24591da177e4SLinus Torvalds 24601da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24611da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24621da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24631da177e4SLinus Torvalds 2464fd39ca9aSNeilBrown static struct nfs4_stateid * 24651da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24661da177e4SLinus Torvalds { 24679346eff0SKrishna Kumar struct nfs4_stateid *local; 24681da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24691da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24701da177e4SLinus Torvalds unsigned int hashval; 24711da177e4SLinus Torvalds 24721da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24739346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 24741da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24751da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24761da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24771da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24781da177e4SLinus Torvalds return local; 24791da177e4SLinus Torvalds } 24801da177e4SLinus Torvalds } 24819346eff0SKrishna Kumar 24829346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 24831da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24841da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24851da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24861da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24871da177e4SLinus Torvalds return local; 24881da177e4SLinus Torvalds } 2489849823c5SNeil Brown } 24901da177e4SLinus Torvalds return NULL; 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds static struct nfs4_delegation * 24941da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24951da177e4SLinus Torvalds { 249613cd2184SNeilBrown struct nfs4_file *fp; 249713cd2184SNeilBrown struct nfs4_delegation *dl; 24981da177e4SLinus Torvalds 24991da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 25001da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 25011da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds fp = find_file(ino); 250413cd2184SNeilBrown if (!fp) 25051da177e4SLinus Torvalds return NULL; 250613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 250713cd2184SNeilBrown put_nfs4_file(fp); 250813cd2184SNeilBrown return dl; 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds /* 25121da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 25131da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25141da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25151da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25161da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25171da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25181da177e4SLinus Torvalds */ 25191da177e4SLinus Torvalds static inline void 25201da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25211da177e4SLinus Torvalds { 25221da177e4SLinus Torvalds if (lock->fl_start < 0) 25231da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25241da177e4SLinus Torvalds if (lock->fl_end < 0) 25251da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds 2528d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2529d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2530e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2531d5b9026aSNeilBrown }; 25321da177e4SLinus Torvalds 25331da177e4SLinus Torvalds static inline void 25341da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25351da177e4SLinus Torvalds { 2536d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2537d5b9026aSNeilBrown unsigned int hval; 25381da177e4SLinus Torvalds 2539d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2540d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2541d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25421da177e4SLinus Torvalds kref_get(&sop->so_ref); 25431da177e4SLinus Torvalds deny->ld_sop = sop; 25441da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2545d5b9026aSNeilBrown } else { 2546d5b9026aSNeilBrown deny->ld_sop = NULL; 2547d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2548d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 255187df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 255287df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 25531da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25541da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25551da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25561da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25571da177e4SLinus Torvalds } 25581da177e4SLinus Torvalds 25591da177e4SLinus Torvalds static struct nfs4_stateowner * 25601da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25611da177e4SLinus Torvalds struct xdr_netobj *owner) 25621da177e4SLinus Torvalds { 25631da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25641da177e4SLinus Torvalds struct nfs4_stateowner *op; 25651da177e4SLinus Torvalds 25661da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2567599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 25681da177e4SLinus Torvalds return op; 25691da177e4SLinus Torvalds } 25701da177e4SLinus Torvalds return NULL; 25711da177e4SLinus Torvalds } 25721da177e4SLinus Torvalds 25731da177e4SLinus Torvalds /* 25741da177e4SLinus Torvalds * Alloc a lock owner structure. 25751da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25761da177e4SLinus Torvalds * occured. 25771da177e4SLinus Torvalds * 25781da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25791da177e4SLinus Torvalds */ 25801da177e4SLinus Torvalds 25811da177e4SLinus Torvalds static struct nfs4_stateowner * 25821da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25831da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25841da177e4SLinus Torvalds struct nfs4_replay *rp; 25851da177e4SLinus Torvalds unsigned int idhashval; 25861da177e4SLinus Torvalds 25871da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25881da177e4SLinus Torvalds return NULL; 25891da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25901da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25911da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25921da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2593ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2594ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25951da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25961da177e4SLinus Torvalds sop->so_time = 0; 25971da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25981da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2599ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 26001da177e4SLinus Torvalds sop->so_is_open_owner = 0; 26011da177e4SLinus Torvalds sop->so_id = current_ownerid++; 26021da177e4SLinus Torvalds sop->so_client = clp; 2603b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2604b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2605b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 26061da177e4SLinus Torvalds sop->so_confirmed = 1; 26071da177e4SLinus Torvalds rp = &sop->so_replay; 2608de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 26091da177e4SLinus Torvalds rp->rp_buflen = 0; 26101da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 26111da177e4SLinus Torvalds return sop; 26121da177e4SLinus Torvalds } 26131da177e4SLinus Torvalds 2614fd39ca9aSNeilBrown static struct nfs4_stateid * 26151da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26161da177e4SLinus Torvalds { 26171da177e4SLinus Torvalds struct nfs4_stateid *stp; 26181da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26191da177e4SLinus Torvalds 26205ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26215ac049acSNeilBrown if (stp == NULL) 26221da177e4SLinus Torvalds goto out; 26231da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26241da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2625ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2626ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26271da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26288beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2629ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26301da177e4SLinus Torvalds stp->st_stateowner = sop; 263113cd2184SNeilBrown get_nfs4_file(fp); 26321da177e4SLinus Torvalds stp->st_file = fp; 26331da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26341da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26351da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26361da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26371da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26381da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26391da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26404c4cd222SNeilBrown stp->st_openstp = open_stp; 26411da177e4SLinus Torvalds 26421da177e4SLinus Torvalds out: 26431da177e4SLinus Torvalds return stp; 26441da177e4SLinus Torvalds } 26451da177e4SLinus Torvalds 2646fd39ca9aSNeilBrown static int 26471da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26481da177e4SLinus Torvalds { 264987df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 26501da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26511da177e4SLinus Torvalds } 26521da177e4SLinus Torvalds 26531da177e4SLinus Torvalds /* 26541da177e4SLinus Torvalds * LOCK operation 26551da177e4SLinus Torvalds */ 2656b37ad28bSAl Viro __be32 2657ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2658a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26591da177e4SLinus Torvalds { 26603e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2661b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26621da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26631da177e4SLinus Torvalds struct file *filp; 26641da177e4SLinus Torvalds struct file_lock file_lock; 26658dc7c311SAndy Adamson struct file_lock conflock; 2666b37ad28bSAl Viro __be32 status = 0; 26671da177e4SLinus Torvalds unsigned int strhashval; 2668150b3934SMarc Eshel unsigned int cmd; 2669b8dd7b9aSAl Viro int err; 26701da177e4SLinus Torvalds 26711da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26721da177e4SLinus Torvalds (long long) lock->lk_offset, 26731da177e4SLinus Torvalds (long long) lock->lk_length); 26741da177e4SLinus Torvalds 26751da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26761da177e4SLinus Torvalds return nfserr_inval; 26771da177e4SLinus Torvalds 2678ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 26798837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 2680a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2681a6f6ef2fSAndy Adamson return status; 2682a6f6ef2fSAndy Adamson } 2683a6f6ef2fSAndy Adamson 26841da177e4SLinus Torvalds nfs4_lock_state(); 26851da177e4SLinus Torvalds 26861da177e4SLinus Torvalds if (lock->lk_is_new) { 26871da177e4SLinus Torvalds /* 26881da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2689893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2690893f8770SNeilBrown * lock stateid. 26911da177e4SLinus Torvalds */ 26921da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26931da177e4SLinus Torvalds struct nfs4_file *fp; 26941da177e4SLinus Torvalds 26951da177e4SLinus Torvalds status = nfserr_stale_clientid; 2696849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26971da177e4SLinus Torvalds goto out; 26981da177e4SLinus Torvalds 26991da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2700ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27011da177e4SLinus Torvalds lock->lk_new_open_seqid, 27021da177e4SLinus Torvalds &lock->lk_new_open_stateid, 2703f3362737SJ. Bruce Fields OPEN_STATE, 27043a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2705b59e3c0eSNeil Brown lock); 270637515177SNeilBrown if (status) 27071da177e4SLinus Torvalds goto out; 27083a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 27091da177e4SLinus Torvalds /* create lockowner and lock stateid */ 27101da177e4SLinus Torvalds fp = open_stp->st_file; 27111da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 27121da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 27131da177e4SLinus Torvalds &lock->v.new.owner); 27143e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27153e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27163e9e3dbeSNeilBrown * create new stateids)? */ 27171da177e4SLinus Torvalds status = nfserr_resource; 2718b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2719b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2720b59e3c0eSNeil Brown if (lock_sop == NULL) 27211da177e4SLinus Torvalds goto out; 2722b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27238a280510SJ. Bruce Fields if (lock_stp == NULL) 27241da177e4SLinus Torvalds goto out; 27251da177e4SLinus Torvalds } else { 27261da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2727ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27281da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27291da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 2730f3362737SJ. Bruce Fields LOCK_STATE, 27313a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27321da177e4SLinus Torvalds if (status) 27331da177e4SLinus Torvalds goto out; 27343a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27351da177e4SLinus Torvalds } 27363a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27371da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27381da177e4SLinus Torvalds 27390dd395dcSNeilBrown status = nfserr_grace; 2740af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 27410dd395dcSNeilBrown goto out; 27420dd395dcSNeilBrown status = nfserr_no_grace; 2743af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 27440dd395dcSNeilBrown goto out; 27450dd395dcSNeilBrown 27461da177e4SLinus Torvalds locks_init_lock(&file_lock); 27471da177e4SLinus Torvalds switch (lock->lk_type) { 27481da177e4SLinus Torvalds case NFS4_READ_LT: 27491da177e4SLinus Torvalds case NFS4_READW_LT: 27501da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2751150b3934SMarc Eshel cmd = F_SETLK; 27521da177e4SLinus Torvalds break; 27531da177e4SLinus Torvalds case NFS4_WRITE_LT: 27541da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27551da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2756150b3934SMarc Eshel cmd = F_SETLK; 27571da177e4SLinus Torvalds break; 27581da177e4SLinus Torvalds default: 27591da177e4SLinus Torvalds status = nfserr_inval; 27601da177e4SLinus Torvalds goto out; 27611da177e4SLinus Torvalds } 2762b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27631da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27641da177e4SLinus Torvalds file_lock.fl_file = filp; 27651da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2766d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27671da177e4SLinus Torvalds 27681da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 276987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 27701da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds /* 27731da177e4SLinus Torvalds * Try to lock the file in the VFS. 27741da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27751da177e4SLinus Torvalds */ 27761da177e4SLinus Torvalds 2777fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2778b8dd7b9aSAl Viro switch (-err) { 27791da177e4SLinus Torvalds case 0: /* success! */ 27801da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27811da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27821da177e4SLinus Torvalds sizeof(stateid_t)); 2783b8dd7b9aSAl Viro status = 0; 2784eb76b3fdSAndy Adamson break; 2785eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2786eb76b3fdSAndy Adamson status = nfserr_denied; 2787eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2788eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2789eb76b3fdSAndy Adamson break; 27901da177e4SLinus Torvalds case (EDEADLK): 27911da177e4SLinus Torvalds status = nfserr_deadlock; 2792eb76b3fdSAndy Adamson break; 27931da177e4SLinus Torvalds default: 2794fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2795eb76b3fdSAndy Adamson status = nfserr_resource; 2796eb76b3fdSAndy Adamson break; 27971da177e4SLinus Torvalds } 27981da177e4SLinus Torvalds out: 27998a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 2800f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 28013a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 28023a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2803a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2804f2327d9aSNeil Brown } 28051da177e4SLinus Torvalds nfs4_unlock_state(); 28061da177e4SLinus Torvalds return status; 28071da177e4SLinus Torvalds } 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds /* 281055ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 281155ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 281255ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 281355ef1274SJ. Bruce Fields * inode operation.) 281455ef1274SJ. Bruce Fields */ 281555ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 281655ef1274SJ. Bruce Fields { 281755ef1274SJ. Bruce Fields struct file *file; 281855ef1274SJ. Bruce Fields int err; 281955ef1274SJ. Bruce Fields 282055ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 282155ef1274SJ. Bruce Fields if (err) 282255ef1274SJ. Bruce Fields return err; 282355ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 282455ef1274SJ. Bruce Fields nfsd_close(file); 282555ef1274SJ. Bruce Fields return err; 282655ef1274SJ. Bruce Fields } 282755ef1274SJ. Bruce Fields 282855ef1274SJ. Bruce Fields /* 28291da177e4SLinus Torvalds * LOCKT operation 28301da177e4SLinus Torvalds */ 2831b37ad28bSAl Viro __be32 2832ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2833ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 28341da177e4SLinus Torvalds { 28351da177e4SLinus Torvalds struct inode *inode; 28361da177e4SLinus Torvalds struct file_lock file_lock; 2837fd85b817SMarc Eshel int error; 2838b37ad28bSAl Viro __be32 status; 28391da177e4SLinus Torvalds 2840af558e33SJ. Bruce Fields if (locks_in_grace()) 28411da177e4SLinus Torvalds return nfserr_grace; 28421da177e4SLinus Torvalds 28431da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28441da177e4SLinus Torvalds return nfserr_inval; 28451da177e4SLinus Torvalds 28461da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28471da177e4SLinus Torvalds nfs4_lock_state(); 28481da177e4SLinus Torvalds 28491da177e4SLinus Torvalds status = nfserr_stale_clientid; 2850849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28511da177e4SLinus Torvalds goto out; 28521da177e4SLinus Torvalds 2853ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2854849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28551da177e4SLinus Torvalds if (status == nfserr_symlink) 28561da177e4SLinus Torvalds status = nfserr_inval; 28571da177e4SLinus Torvalds goto out; 28581da177e4SLinus Torvalds } 28591da177e4SLinus Torvalds 2860ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28611da177e4SLinus Torvalds locks_init_lock(&file_lock); 28621da177e4SLinus Torvalds switch (lockt->lt_type) { 28631da177e4SLinus Torvalds case NFS4_READ_LT: 28641da177e4SLinus Torvalds case NFS4_READW_LT: 28651da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28661da177e4SLinus Torvalds break; 28671da177e4SLinus Torvalds case NFS4_WRITE_LT: 28681da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28691da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28701da177e4SLinus Torvalds break; 28711da177e4SLinus Torvalds default: 28722fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 28731da177e4SLinus Torvalds status = nfserr_inval; 28741da177e4SLinus Torvalds goto out; 28751da177e4SLinus Torvalds } 28761da177e4SLinus Torvalds 28771da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28781da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28791da177e4SLinus Torvalds if (lockt->lt_stateowner) 28801da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28811da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28821da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 28831da177e4SLinus Torvalds 28841da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 288587df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 28861da177e4SLinus Torvalds 28871da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds status = nfs_ok; 289055ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 2891fd85b817SMarc Eshel if (error) { 2892fd85b817SMarc Eshel status = nfserrno(error); 2893fd85b817SMarc Eshel goto out; 2894fd85b817SMarc Eshel } 28959d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 28961da177e4SLinus Torvalds status = nfserr_denied; 28979d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 28981da177e4SLinus Torvalds } 28991da177e4SLinus Torvalds out: 29001da177e4SLinus Torvalds nfs4_unlock_state(); 29011da177e4SLinus Torvalds return status; 29021da177e4SLinus Torvalds } 29031da177e4SLinus Torvalds 2904b37ad28bSAl Viro __be32 2905ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2906a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 29071da177e4SLinus Torvalds { 29081da177e4SLinus Torvalds struct nfs4_stateid *stp; 29091da177e4SLinus Torvalds struct file *filp = NULL; 29101da177e4SLinus Torvalds struct file_lock file_lock; 2911b37ad28bSAl Viro __be32 status; 2912b8dd7b9aSAl Viro int err; 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29151da177e4SLinus Torvalds (long long) locku->lu_offset, 29161da177e4SLinus Torvalds (long long) locku->lu_length); 29171da177e4SLinus Torvalds 29181da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29191da177e4SLinus Torvalds return nfserr_inval; 29201da177e4SLinus Torvalds 29211da177e4SLinus Torvalds nfs4_lock_state(); 29221da177e4SLinus Torvalds 2923ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 29241da177e4SLinus Torvalds locku->lu_seqid, 29251da177e4SLinus Torvalds &locku->lu_stateid, 2926f3362737SJ. Bruce Fields LOCK_STATE, 29271da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29281da177e4SLinus Torvalds goto out; 29291da177e4SLinus Torvalds 29301da177e4SLinus Torvalds filp = stp->st_vfs_file; 29311da177e4SLinus Torvalds BUG_ON(!filp); 29321da177e4SLinus Torvalds locks_init_lock(&file_lock); 29331da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29341da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29351da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29361da177e4SLinus Torvalds file_lock.fl_file = filp; 29371da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2938d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29391da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29401da177e4SLinus Torvalds 294187df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 29421da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29431da177e4SLinus Torvalds 29441da177e4SLinus Torvalds /* 29451da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29461da177e4SLinus Torvalds */ 2947fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2948b8dd7b9aSAl Viro if (err) { 2949fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29501da177e4SLinus Torvalds goto out_nfserr; 29511da177e4SLinus Torvalds } 29521da177e4SLinus Torvalds /* 29531da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29541da177e4SLinus Torvalds */ 29551da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29561da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29571da177e4SLinus Torvalds 29581da177e4SLinus Torvalds out: 2959f2327d9aSNeil Brown if (locku->lu_stateowner) { 29601da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2961a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2962f2327d9aSNeil Brown } 29631da177e4SLinus Torvalds nfs4_unlock_state(); 29641da177e4SLinus Torvalds return status; 29651da177e4SLinus Torvalds 29661da177e4SLinus Torvalds out_nfserr: 2967b8dd7b9aSAl Viro status = nfserrno(err); 29681da177e4SLinus Torvalds goto out; 29691da177e4SLinus Torvalds } 29701da177e4SLinus Torvalds 29711da177e4SLinus Torvalds /* 29721da177e4SLinus Torvalds * returns 29731da177e4SLinus Torvalds * 1: locks held by lockowner 29741da177e4SLinus Torvalds * 0: no locks held by lockowner 29751da177e4SLinus Torvalds */ 29761da177e4SLinus Torvalds static int 29771da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29781da177e4SLinus Torvalds { 29791da177e4SLinus Torvalds struct file_lock **flpp; 29807eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 29811da177e4SLinus Torvalds int status = 0; 29821da177e4SLinus Torvalds 29831da177e4SLinus Torvalds lock_kernel(); 29841da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2985796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29861da177e4SLinus Torvalds status = 1; 29871da177e4SLinus Torvalds goto out; 29881da177e4SLinus Torvalds } 2989796dadfdSJ. Bruce Fields } 29901da177e4SLinus Torvalds out: 29911da177e4SLinus Torvalds unlock_kernel(); 29921da177e4SLinus Torvalds return status; 29931da177e4SLinus Torvalds } 29941da177e4SLinus Torvalds 2995b37ad28bSAl Viro __be32 2996b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 2997b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2998b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 29991da177e4SLinus Torvalds { 30001da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 30013e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 30023e9e3dbeSNeilBrown struct nfs4_stateid *stp; 30031da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 30043e9e3dbeSNeilBrown struct list_head matches; 30053e9e3dbeSNeilBrown int i; 3006b37ad28bSAl Viro __be32 status; 30071da177e4SLinus Torvalds 30081da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 30091da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30101da177e4SLinus Torvalds 30111da177e4SLinus Torvalds /* XXX check for lease expiration */ 30121da177e4SLinus Torvalds 30131da177e4SLinus Torvalds status = nfserr_stale_clientid; 3014849823c5SNeil Brown if (STALE_CLIENTID(clid)) 30151da177e4SLinus Torvalds return status; 30161da177e4SLinus Torvalds 30171da177e4SLinus Torvalds nfs4_lock_state(); 30181da177e4SLinus Torvalds 30191da177e4SLinus Torvalds status = nfserr_locks_held; 30203e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30213e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30223e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30233e9e3dbeSNeilBrown * data structures. */ 30243e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30253e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30263e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3027599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 30283e9e3dbeSNeilBrown continue; 30293e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3030ea1da636SNeilBrown st_perstateowner) { 30313e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30321da177e4SLinus Torvalds goto out; 30333e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30343e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30353e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30361da177e4SLinus Torvalds } 30373e9e3dbeSNeilBrown } 30383e9e3dbeSNeilBrown } 30393e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30403e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30413e9e3dbeSNeilBrown * have been checked. */ 30421da177e4SLinus Torvalds status = nfs_ok; 30430fa822e4SNeilBrown while (!list_empty(&matches)) { 30440fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30450fa822e4SNeilBrown so_perclient); 30460fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30470fa822e4SNeilBrown * for openowners. */ 30480fa822e4SNeilBrown list_del(&sop->so_perclient); 3049f044ff83SJ. Bruce Fields release_lockowner(sop); 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds out: 30521da177e4SLinus Torvalds nfs4_unlock_state(); 30531da177e4SLinus Torvalds return status; 30541da177e4SLinus Torvalds } 30551da177e4SLinus Torvalds 30561da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3057a55370a3SNeilBrown alloc_reclaim(void) 30581da177e4SLinus Torvalds { 3059a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30601da177e4SLinus Torvalds } 30611da177e4SLinus Torvalds 3062c7b9a459SNeilBrown int 3063c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3064c7b9a459SNeilBrown { 3065c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3066c7b9a459SNeilBrown struct nfs4_client *clp; 3067c7b9a459SNeilBrown 3068c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3069c7b9a459SNeilBrown return clp ? 1 : 0; 3070c7b9a459SNeilBrown } 3071c7b9a459SNeilBrown 30721da177e4SLinus Torvalds /* 30731da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30741da177e4SLinus Torvalds */ 3075190e4fbfSNeilBrown int 3076190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30771da177e4SLinus Torvalds { 30781da177e4SLinus Torvalds unsigned int strhashval; 30791da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30801da177e4SLinus Torvalds 3081a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3082a55370a3SNeilBrown crp = alloc_reclaim(); 30831da177e4SLinus Torvalds if (!crp) 30841da177e4SLinus Torvalds return 0; 3085a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30861da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30871da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3088a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30891da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30901da177e4SLinus Torvalds return 1; 30911da177e4SLinus Torvalds } 30921da177e4SLinus Torvalds 30931da177e4SLinus Torvalds static void 30941da177e4SLinus Torvalds nfs4_release_reclaim(void) 30951da177e4SLinus Torvalds { 30961da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30971da177e4SLinus Torvalds int i; 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31001da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 31011da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 31021da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 31031da177e4SLinus Torvalds list_del(&crp->cr_strhash); 31041da177e4SLinus Torvalds kfree(crp); 31051da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 31061da177e4SLinus Torvalds } 31071da177e4SLinus Torvalds } 31081da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 31091da177e4SLinus Torvalds } 31101da177e4SLinus Torvalds 31111da177e4SLinus Torvalds /* 31121da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3113fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31141da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31151da177e4SLinus Torvalds { 31161da177e4SLinus Torvalds unsigned int strhashval; 31171da177e4SLinus Torvalds struct nfs4_client *clp; 31181da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31191da177e4SLinus Torvalds 31201da177e4SLinus Torvalds 31211da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31221da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31231da177e4SLinus Torvalds if (clp == NULL) 31241da177e4SLinus Torvalds return NULL; 31251da177e4SLinus Torvalds 3126a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3127a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3128a55370a3SNeilBrown clp->cl_recdir); 31291da177e4SLinus Torvalds 31301da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3131a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31321da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3133a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31341da177e4SLinus Torvalds return crp; 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds } 31371da177e4SLinus Torvalds return NULL; 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds 31401da177e4SLinus Torvalds /* 31411da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31421da177e4SLinus Torvalds */ 3143b37ad28bSAl Viro __be32 31441da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31451da177e4SLinus Torvalds { 3146dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31471da177e4SLinus Torvalds } 31481da177e4SLinus Torvalds 3149ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31501da177e4SLinus Torvalds 3151e8ff2a84SJ. Bruce Fields int 3152ac4d8ff2SNeilBrown nfs4_state_init(void) 31531da177e4SLinus Torvalds { 3154e8ff2a84SJ. Bruce Fields int i, status; 31551da177e4SLinus Torvalds 3156e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3157e8ff2a84SJ. Bruce Fields if (status) 3158e8ff2a84SJ. Bruce Fields return status; 31591da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31601da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31611da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31621da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31631da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31641da177e4SLinus Torvalds } 31651da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31661da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31671da177e4SLinus Torvalds } 31681da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31691da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31701da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31711da177e4SLinus Torvalds } 31721da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31731da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31741da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31751da177e4SLinus Torvalds } 31761da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31771da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31781da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31791da177e4SLinus Torvalds } 31801da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31811da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31821da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31831da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3184ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3185ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3186ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3187e8ff2a84SJ. Bruce Fields return 0; 3188ac4d8ff2SNeilBrown } 3189ac4d8ff2SNeilBrown 3190190e4fbfSNeilBrown static void 3191190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3192190e4fbfSNeilBrown { 3193190e4fbfSNeilBrown int status; 3194190e4fbfSNeilBrown 31950964a3d3SNeilBrown nfs4_lock_state(); 31960964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3197190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31980964a3d3SNeilBrown nfs4_unlock_state(); 3199190e4fbfSNeilBrown if (status) 3200190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3201190e4fbfSNeilBrown } 3202190e4fbfSNeilBrown 32039a8db97eSMarc Eshel unsigned long 32049a8db97eSMarc Eshel get_nfs4_grace_period(void) 32059a8db97eSMarc Eshel { 32069a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 32079a8db97eSMarc Eshel } 32089a8db97eSMarc Eshel 3209c2f1a551SMeelap Shah /* 3210c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3211c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3212c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3213c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3214c2f1a551SMeelap Shah * 3215c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3216c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3217c2f1a551SMeelap Shah */ 3218c2f1a551SMeelap Shah static void 3219c2f1a551SMeelap Shah set_max_delegations(void) 3220c2f1a551SMeelap Shah { 3221c2f1a551SMeelap Shah /* 3222c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3223c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3224c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3225c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3226c2f1a551SMeelap Shah */ 3227c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3228c2f1a551SMeelap Shah } 3229c2f1a551SMeelap Shah 3230ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3231ac4d8ff2SNeilBrown 3232ac4d8ff2SNeilBrown static void 3233ac4d8ff2SNeilBrown __nfs4_state_start(void) 3234ac4d8ff2SNeilBrown { 32359a8db97eSMarc Eshel unsigned long grace_time; 3236ac4d8ff2SNeilBrown 32371da177e4SLinus Torvalds boot_time = get_seconds(); 3238af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3239d99a05adSNeilBrown lease_time = user_lease_time; 3240af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 32419a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32429a8db97eSMarc Eshel grace_time/HZ); 324358da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32449a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3245c2f1a551SMeelap Shah set_max_delegations(); 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds 3248e8ff2a84SJ. Bruce Fields void 324976a3550eSNeilBrown nfs4_state_start(void) 32501da177e4SLinus Torvalds { 32511da177e4SLinus Torvalds if (nfs4_init) 3252e8ff2a84SJ. Bruce Fields return; 3253190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 325476a3550eSNeilBrown __nfs4_state_start(); 32551da177e4SLinus Torvalds nfs4_init = 1; 3256e8ff2a84SJ. Bruce Fields return; 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds time_t 32601da177e4SLinus Torvalds nfs4_lease_time(void) 32611da177e4SLinus Torvalds { 32621da177e4SLinus Torvalds return lease_time; 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static void 32661da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32671da177e4SLinus Torvalds { 32681da177e4SLinus Torvalds int i; 32691da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32701da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32711da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32721da177e4SLinus Torvalds 32731da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32741da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32751da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32761da177e4SLinus Torvalds expire_client(clp); 32771da177e4SLinus Torvalds } 32781da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32791da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32801da177e4SLinus Torvalds expire_client(clp); 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds } 32831da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32841da177e4SLinus Torvalds spin_lock(&recall_lock); 32851da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32861da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32871da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds spin_unlock(&recall_lock); 32901da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32911da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32921da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32931da177e4SLinus Torvalds unhash_delegation(dp); 32941da177e4SLinus Torvalds } 32951da177e4SLinus Torvalds 3296190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32971da177e4SLinus Torvalds nfs4_init = 0; 32981da177e4SLinus Torvalds } 32991da177e4SLinus Torvalds 33001da177e4SLinus Torvalds void 33011da177e4SLinus Torvalds nfs4_state_shutdown(void) 33021da177e4SLinus Torvalds { 33035e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 33045e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 33052c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 33061da177e4SLinus Torvalds nfs4_lock_state(); 33071da177e4SLinus Torvalds nfs4_release_reclaim(); 33081da177e4SLinus Torvalds __nfs4_state_shutdown(); 33091da177e4SLinus Torvalds nfs4_unlock_state(); 33101da177e4SLinus Torvalds } 33111da177e4SLinus Torvalds 33123dd98a3bSJeff Layton /* 33133dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 33143dd98a3bSJeff Layton * accessed when nfsd is starting. 33153dd98a3bSJeff Layton */ 33160964a3d3SNeilBrown static void 33170964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33180964a3d3SNeilBrown { 33190964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33200964a3d3SNeilBrown } 33210964a3d3SNeilBrown 33220964a3d3SNeilBrown /* 33230964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33240964a3d3SNeilBrown */ 33250964a3d3SNeilBrown int 33260964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33270964a3d3SNeilBrown { 33280964a3d3SNeilBrown int status; 3329a63bb996SAl Viro struct path path; 33300964a3d3SNeilBrown 3331a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 33320964a3d3SNeilBrown if (status) 33330964a3d3SNeilBrown return status; 33340964a3d3SNeilBrown status = -ENOTDIR; 3335a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 33360964a3d3SNeilBrown nfs4_set_recdir(recdir); 33370964a3d3SNeilBrown status = 0; 33380964a3d3SNeilBrown } 3339a63bb996SAl Viro path_put(&path); 33400964a3d3SNeilBrown return status; 33410964a3d3SNeilBrown } 33420964a3d3SNeilBrown 33433dd98a3bSJeff Layton char * 33443dd98a3bSJeff Layton nfs4_recoverydir(void) 33453dd98a3bSJeff Layton { 33463dd98a3bSJeff Layton return user_recovery_dirname; 33473dd98a3bSJeff Layton } 33483dd98a3bSJeff Layton 33491da177e4SLinus Torvalds /* 33501da177e4SLinus Torvalds * Called when leasetime is changed. 33511da177e4SLinus Torvalds * 3352d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3353d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3354d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3355d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3356d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33573dd98a3bSJeff Layton * 33583dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 33593dd98a3bSJeff Layton * when nfsd is starting 33601da177e4SLinus Torvalds */ 33611da177e4SLinus Torvalds void 33621da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33631da177e4SLinus Torvalds { 3364d99a05adSNeilBrown user_lease_time = leasetime; 33651da177e4SLinus Torvalds } 3366