11da177e4SLinus Torvalds /* 21da177e4SLinus Torvalds * linux/fs/nfsd/nfs4state.c 31da177e4SLinus Torvalds * 41da177e4SLinus Torvalds * Copyright (c) 2001 The Regents of the University of Michigan. 51da177e4SLinus Torvalds * All rights reserved. 61da177e4SLinus Torvalds * 71da177e4SLinus Torvalds * Kendrick Smith <kmsmith@umich.edu> 81da177e4SLinus Torvalds * Andy Adamson <kandros@umich.edu> 91da177e4SLinus Torvalds * 101da177e4SLinus Torvalds * Redistribution and use in source and binary forms, with or without 111da177e4SLinus Torvalds * modification, are permitted provided that the following conditions 121da177e4SLinus Torvalds * are met: 131da177e4SLinus Torvalds * 141da177e4SLinus Torvalds * 1. Redistributions of source code must retain the above copyright 151da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer. 161da177e4SLinus Torvalds * 2. Redistributions in binary form must reproduce the above copyright 171da177e4SLinus Torvalds * notice, this list of conditions and the following disclaimer in the 181da177e4SLinus Torvalds * documentation and/or other materials provided with the distribution. 191da177e4SLinus Torvalds * 3. Neither the name of the University nor the names of its 201da177e4SLinus Torvalds * contributors may be used to endorse or promote products derived 211da177e4SLinus Torvalds * from this software without specific prior written permission. 221da177e4SLinus Torvalds * 231da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 241da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 251da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 261da177e4SLinus Torvalds * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 271da177e4SLinus Torvalds * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 281da177e4SLinus Torvalds * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 291da177e4SLinus Torvalds * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 301da177e4SLinus Torvalds * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 311da177e4SLinus Torvalds * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 321da177e4SLinus Torvalds * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 331da177e4SLinus Torvalds * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 341da177e4SLinus Torvalds * 351da177e4SLinus Torvalds */ 361da177e4SLinus Torvalds 371da177e4SLinus Torvalds #include <linux/param.h> 381da177e4SLinus Torvalds #include <linux/major.h> 391da177e4SLinus Torvalds #include <linux/slab.h> 401da177e4SLinus Torvalds 411da177e4SLinus Torvalds #include <linux/sunrpc/svc.h> 421da177e4SLinus Torvalds #include <linux/nfsd/nfsd.h> 431da177e4SLinus Torvalds #include <linux/nfsd/cache.h> 44aceaf78dSDave Hansen #include <linux/file.h> 451da177e4SLinus Torvalds #include <linux/mount.h> 461da177e4SLinus Torvalds #include <linux/workqueue.h> 471da177e4SLinus Torvalds #include <linux/smp_lock.h> 481da177e4SLinus Torvalds #include <linux/kthread.h> 491da177e4SLinus Torvalds #include <linux/nfs4.h> 501da177e4SLinus Torvalds #include <linux/nfsd/state.h> 511da177e4SLinus Torvalds #include <linux/nfsd/xdr4.h> 520964a3d3SNeilBrown #include <linux/namei.h> 53c2f1a551SMeelap Shah #include <linux/swap.h> 54353ab6e9SIngo Molnar #include <linux/mutex.h> 55fd85b817SMarc Eshel #include <linux/lockd/bind.h> 569a8db97eSMarc Eshel #include <linux/module.h> 5768e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* Globals */ 621da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 63d99a05adSNeilBrown static time_t user_lease_time = 90; 64fd39ca9aSNeilBrown static time_t boot_time; 651da177e4SLinus Torvalds static u32 current_ownerid = 1; 661da177e4SLinus Torvalds static u32 current_fileid = 1; 671da177e4SLinus Torvalds static u32 current_delegid = 1; 681da177e4SLinus Torvalds static u32 nfs4_init; 69fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 70fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 71fd39ca9aSNeilBrown 72fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 73fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 771da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 780964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 790964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 801da177e4SLinus Torvalds 818b671b80SJ. Bruce Fields /* Locking: */ 828b671b80SJ. Bruce Fields 838b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 84353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 851da177e4SLinus Torvalds 868b671b80SJ. Bruce Fields /* 878b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 888b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 898b671b80SJ. Bruce Fields * eventually cover more: 908b671b80SJ. Bruce Fields */ 918b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 928b671b80SJ. Bruce Fields 93e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 94e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 95e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 96e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 97e60d4398SNeilBrown 981da177e4SLinus Torvalds void 991da177e4SLinus Torvalds nfs4_lock_state(void) 1001da177e4SLinus Torvalds { 101353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds void 1051da177e4SLinus Torvalds nfs4_unlock_state(void) 1061da177e4SLinus Torvalds { 107353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1081da177e4SLinus Torvalds } 1091da177e4SLinus Torvalds 1101da177e4SLinus Torvalds static inline u32 1111da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1121da177e4SLinus Torvalds { 1131da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1141da177e4SLinus Torvalds 1151da177e4SLinus Torvalds u32 x = 0; 1161da177e4SLinus Torvalds while (nbytes--) { 1171da177e4SLinus Torvalds x *= 37; 1181da177e4SLinus Torvalds x += *cptr++; 1191da177e4SLinus Torvalds } 1201da177e4SLinus Torvalds return x; 1211da177e4SLinus Torvalds } 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds static struct list_head del_recall_lru; 1241da177e4SLinus Torvalds 12513cd2184SNeilBrown static inline void 12613cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 12713cd2184SNeilBrown { 1288b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1298b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1308b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1318b671b80SJ. Bruce Fields iput(fi->fi_inode); 1328b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1338b671b80SJ. Bruce Fields } 13413cd2184SNeilBrown } 13513cd2184SNeilBrown 13613cd2184SNeilBrown static inline void 13713cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 13813cd2184SNeilBrown { 1398b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 14013cd2184SNeilBrown } 14113cd2184SNeilBrown 142ef0f3390SNeilBrown static int num_delegations; 143c2f1a551SMeelap Shah unsigned int max_delegations; 144ef0f3390SNeilBrown 145ef0f3390SNeilBrown /* 146ef0f3390SNeilBrown * Open owner state (share locks) 147ef0f3390SNeilBrown */ 148ef0f3390SNeilBrown 149ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 150ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 151ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 152ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 153ef0f3390SNeilBrown 154ef0f3390SNeilBrown #define ownerid_hashval(id) \ 155ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 156ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 157ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 160ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 161ef0f3390SNeilBrown 162ef0f3390SNeilBrown /* hash table for nfs4_file */ 163ef0f3390SNeilBrown #define FILE_HASH_BITS 8 164ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 165ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 166ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 167ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 168ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 169ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 170ef0f3390SNeilBrown 171ef0f3390SNeilBrown #define file_hashval(x) \ 172ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 173ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 174ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 175ef0f3390SNeilBrown 176ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 177ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 178ef0f3390SNeilBrown 1791da177e4SLinus Torvalds static struct nfs4_delegation * 1801da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1811da177e4SLinus Torvalds { 1821da177e4SLinus Torvalds struct nfs4_delegation *dp; 1831da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1841da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1851da177e4SLinus Torvalds 1861da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 18747f9940cSMeelap Shah if (fp->fi_had_conflict) 18847f9940cSMeelap Shah return NULL; 189c2f1a551SMeelap Shah if (num_delegations > max_delegations) 190ef0f3390SNeilBrown return NULL; 1915b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1925b2d21c1SNeilBrown if (dp == NULL) 1931da177e4SLinus Torvalds return dp; 194ef0f3390SNeilBrown num_delegations++; 195ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 196ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1971da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1981da177e4SLinus Torvalds dp->dl_client = clp; 19913cd2184SNeilBrown get_nfs4_file(fp); 2001da177e4SLinus Torvalds dp->dl_file = fp; 2011da177e4SLinus Torvalds dp->dl_flock = NULL; 2021da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2031da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2041da177e4SLinus Torvalds dp->dl_type = type; 2051da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2061da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2071da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2081da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2091da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2101da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2111da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2126c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2131da177e4SLinus Torvalds dp->dl_time = 0; 2141da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 215ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 216ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2171da177e4SLinus Torvalds return dp; 2181da177e4SLinus Torvalds } 2191da177e4SLinus Torvalds 2201da177e4SLinus Torvalds void 2211da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2221da177e4SLinus Torvalds { 2231da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2241da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 22513cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2265b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 227ef0f3390SNeilBrown num_delegations--; 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds 2311da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2321da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2331da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2341da177e4SLinus Torvalds * fl_release_callback. 2351da177e4SLinus Torvalds */ 2361da177e4SLinus Torvalds static void 2371da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2381da177e4SLinus Torvalds { 2391da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2401da177e4SLinus Torvalds 2411da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2421da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2431da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2441da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 245c907132dSNeilBrown if (dp->dl_flock) 246a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2471da177e4SLinus Torvalds nfsd_close(filp); 2481da177e4SLinus Torvalds } 2491da177e4SLinus Torvalds 2501da177e4SLinus Torvalds /* Called under the state lock. */ 2511da177e4SLinus Torvalds static void 2521da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2531da177e4SLinus Torvalds { 254ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 255ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2561da177e4SLinus Torvalds spin_lock(&recall_lock); 2571da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2581da177e4SLinus Torvalds spin_unlock(&recall_lock); 2591da177e4SLinus Torvalds nfs4_close_delegation(dp); 2601da177e4SLinus Torvalds nfs4_put_delegation(dp); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* 2641da177e4SLinus Torvalds * SETCLIENTID state 2651da177e4SLinus Torvalds */ 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2681da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2691da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2701da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2711da177e4SLinus Torvalds 2721da177e4SLinus Torvalds #define clientid_hashval(id) \ 2731da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 274a55370a3SNeilBrown #define clientstr_hashval(name) \ 275a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2781da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2791da177e4SLinus Torvalds * 2801da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2811da177e4SLinus Torvalds * setclientid_confirmed info. 2821da177e4SLinus Torvalds * 2831da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2841da177e4SLinus Torvalds * setclientid info. 2851da177e4SLinus Torvalds * 2861da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2871da177e4SLinus Torvalds * for lease renewal. 2881da177e4SLinus Torvalds * 2891da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2901da177e4SLinus Torvalds * for last close replay. 2911da177e4SLinus Torvalds */ 2921da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2931da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2941da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2951da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2961da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2971da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2981da177e4SLinus Torvalds static struct list_head client_lru; 2991da177e4SLinus Torvalds static struct list_head close_lru; 3001da177e4SLinus Torvalds 3012283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 3022283963fSJ. Bruce Fields { 3032283963fSJ. Bruce Fields list_del(&stp->st_hash); 3042283963fSJ. Bruce Fields list_del(&stp->st_perfile); 3052283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 3062283963fSJ. Bruce Fields } 3072283963fSJ. Bruce Fields 3082283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 3092283963fSJ. Bruce Fields { 3102283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3112283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3122283963fSJ. Bruce Fields } 3132283963fSJ. Bruce Fields 3142283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3152283963fSJ. Bruce Fields { 3162283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3172283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3182283963fSJ. Bruce Fields free_generic_stateid(stp); 3192283963fSJ. Bruce Fields } 3202283963fSJ. Bruce Fields 321f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 322f044ff83SJ. Bruce Fields { 323f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 324f044ff83SJ. Bruce Fields 325f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 326f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 327f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 328f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 329f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 330f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 331f044ff83SJ. Bruce Fields release_lock_stateid(stp); 332f044ff83SJ. Bruce Fields } 333f044ff83SJ. Bruce Fields } 334f044ff83SJ. Bruce Fields 335f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 336f044ff83SJ. Bruce Fields { 337f044ff83SJ. Bruce Fields unhash_lockowner(sop); 338f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 339f044ff83SJ. Bruce Fields } 340f044ff83SJ. Bruce Fields 341f1d110caSJ. Bruce Fields static void 342f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 343f1d110caSJ. Bruce Fields { 344f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 345f1d110caSJ. Bruce Fields 346f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 347f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 348f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 349f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 350f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 351f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 352f1d110caSJ. Bruce Fields } 353f1d110caSJ. Bruce Fields } 354f1d110caSJ. Bruce Fields 3552283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3562283963fSJ. Bruce Fields { 3572283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3582283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3592283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3602283963fSJ. Bruce Fields free_generic_stateid(stp); 3612283963fSJ. Bruce Fields } 3622283963fSJ. Bruce Fields 363f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 364f1d110caSJ. Bruce Fields { 365f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 366f1d110caSJ. Bruce Fields 367f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 368f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 369f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 370f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 371f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 372f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 373f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 374f1d110caSJ. Bruce Fields release_open_stateid(stp); 375f1d110caSJ. Bruce Fields } 376f1d110caSJ. Bruce Fields } 377f1d110caSJ. Bruce Fields 378f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 379f1d110caSJ. Bruce Fields { 380f044ff83SJ. Bruce Fields unhash_openowner(sop); 381f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 382f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 383f1d110caSJ. Bruce Fields } 384f1d110caSJ. Bruce Fields 3855282fd72SMarc Eshel static DEFINE_SPINLOCK(sessionid_lock); 3865282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 3875282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 3885282fd72SMarc Eshel 3895282fd72SMarc Eshel static inline int 3905282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 3915282fd72SMarc Eshel { 3925282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 3935282fd72SMarc Eshel 3945282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 3955282fd72SMarc Eshel } 3965282fd72SMarc Eshel 3975282fd72SMarc Eshel static inline void 3985282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 3995282fd72SMarc Eshel { 4005282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 4015282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 4025282fd72SMarc Eshel } 4035282fd72SMarc Eshel 4045282fd72SMarc Eshel /* caller must hold sessionid_lock */ 4055282fd72SMarc Eshel static struct nfsd4_session * 4065282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 4075282fd72SMarc Eshel { 4085282fd72SMarc Eshel struct nfsd4_session *elem; 4095282fd72SMarc Eshel int idx; 4105282fd72SMarc Eshel 4115282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 4125282fd72SMarc Eshel idx = hash_sessionid(sessionid); 4135282fd72SMarc Eshel dprintk("%s: idx is %d\n", __func__, idx); 4145282fd72SMarc Eshel /* Search in the appropriate list */ 4155282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 4165282fd72SMarc Eshel dump_sessionid("list traversal", &elem->se_sessionid); 4175282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 4185282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 4195282fd72SMarc Eshel return elem; 4205282fd72SMarc Eshel } 4215282fd72SMarc Eshel } 4225282fd72SMarc Eshel 4235282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 4245282fd72SMarc Eshel return NULL; 4255282fd72SMarc Eshel } 4265282fd72SMarc Eshel 4275282fd72SMarc Eshel /* caller must hold sessionid_lock */ 4287116ed6bSAndy Adamson static void 4295282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 4307116ed6bSAndy Adamson { 4317116ed6bSAndy Adamson list_del(&ses->se_hash); 4327116ed6bSAndy Adamson list_del(&ses->se_perclnt); 4335282fd72SMarc Eshel } 4345282fd72SMarc Eshel 4355282fd72SMarc Eshel static void 4365282fd72SMarc Eshel release_session(struct nfsd4_session *ses) 4375282fd72SMarc Eshel { 4385282fd72SMarc Eshel spin_lock(&sessionid_lock); 4395282fd72SMarc Eshel unhash_session(ses); 4405282fd72SMarc Eshel spin_unlock(&sessionid_lock); 4417116ed6bSAndy Adamson nfsd4_put_session(ses); 4427116ed6bSAndy Adamson } 4437116ed6bSAndy Adamson 44414778a13SAndy Adamson static void nfsd4_release_respages(struct page **respages, short resused); 44514778a13SAndy Adamson 4467116ed6bSAndy Adamson void 4477116ed6bSAndy Adamson free_session(struct kref *kref) 4487116ed6bSAndy Adamson { 4497116ed6bSAndy Adamson struct nfsd4_session *ses; 45014778a13SAndy Adamson int i; 4517116ed6bSAndy Adamson 4527116ed6bSAndy Adamson ses = container_of(kref, struct nfsd4_session, se_ref); 45314778a13SAndy Adamson for (i = 0; i < ses->se_fnumslots; i++) { 45414778a13SAndy Adamson struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; 45514778a13SAndy Adamson nfsd4_release_respages(e->ce_respages, e->ce_resused); 45614778a13SAndy Adamson } 4577116ed6bSAndy Adamson kfree(ses->se_slots); 4587116ed6bSAndy Adamson kfree(ses); 4597116ed6bSAndy Adamson } 4607116ed6bSAndy Adamson 4611da177e4SLinus Torvalds static inline void 4621da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 4631da177e4SLinus Torvalds { 4641da177e4SLinus Torvalds /* 4651da177e4SLinus Torvalds * Move client to the end to the LRU list. 4661da177e4SLinus Torvalds */ 4671da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 4681da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 4691da177e4SLinus Torvalds clp->cl_clientid.cl_id); 4701da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 4711da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 4751da177e4SLinus Torvalds static int 4761da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 4771da177e4SLinus Torvalds { 4781da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 4791da177e4SLinus Torvalds return 0; 4801da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 4811da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 4821da177e4SLinus Torvalds return 1; 4831da177e4SLinus Torvalds } 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds /* 4861da177e4SLinus Torvalds * XXX Should we use a slab cache ? 4871da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 4881da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 4891da177e4SLinus Torvalds */ 49035bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 4911da177e4SLinus Torvalds { 4921da177e4SLinus Torvalds struct nfs4_client *clp; 4931da177e4SLinus Torvalds 49435bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 49535bba9a3SJ. Bruce Fields if (clp == NULL) 49635bba9a3SJ. Bruce Fields return NULL; 49735bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 49835bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 49935bba9a3SJ. Bruce Fields kfree(clp); 50035bba9a3SJ. Bruce Fields return NULL; 50135bba9a3SJ. Bruce Fields } 5021da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 5031da177e4SLinus Torvalds clp->cl_name.len = name.len; 5041da177e4SLinus Torvalds return clp; 5051da177e4SLinus Torvalds } 5061da177e4SLinus Torvalds 5071b1a9b31SJ. Bruce Fields static void 5081b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 5091b1a9b31SJ. Bruce Fields { 5101b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 5111b1a9b31SJ. Bruce Fields 5121b1a9b31SJ. Bruce Fields if (clnt) { 513404ec117SJ. Bruce Fields /* 514404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 515404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 516404ec117SJ. Bruce Fields */ 5171b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 5181b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 5191b1a9b31SJ. Bruce Fields } 5201b1a9b31SJ. Bruce Fields } 5211b1a9b31SJ. Bruce Fields 5221da177e4SLinus Torvalds static inline void 5231da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 5241da177e4SLinus Torvalds { 5251b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 5261da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 5271da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 52868e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 5291da177e4SLinus Torvalds kfree(clp->cl_name.data); 5301da177e4SLinus Torvalds kfree(clp); 5311da177e4SLinus Torvalds } 5321da177e4SLinus Torvalds 5331da177e4SLinus Torvalds void 5341da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 5351da177e4SLinus Torvalds { 5361da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 5371da177e4SLinus Torvalds free_client(clp); 5381da177e4SLinus Torvalds } 5391da177e4SLinus Torvalds 5401da177e4SLinus Torvalds static void 5411da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 5421da177e4SLinus Torvalds { 5431da177e4SLinus Torvalds struct nfs4_stateowner *sop; 5441da177e4SLinus Torvalds struct nfs4_delegation *dp; 5451da177e4SLinus Torvalds struct list_head reaplist; 5461da177e4SLinus Torvalds 5471da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 5481da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 5511da177e4SLinus Torvalds spin_lock(&recall_lock); 552ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 553ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 5541da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 5551da177e4SLinus Torvalds dp->dl_flock); 556ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 5571da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 5581da177e4SLinus Torvalds } 5591da177e4SLinus Torvalds spin_unlock(&recall_lock); 5601da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 5611da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 5621da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 5631da177e4SLinus Torvalds unhash_delegation(dp); 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds list_del(&clp->cl_idhash); 5661da177e4SLinus Torvalds list_del(&clp->cl_strhash); 5671da177e4SLinus Torvalds list_del(&clp->cl_lru); 568ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 569ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 570f044ff83SJ. Bruce Fields release_openowner(sop); 5711da177e4SLinus Torvalds } 572c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 573c4bf7868SMarc Eshel struct nfsd4_session *ses; 574c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 575c4bf7868SMarc Eshel se_perclnt); 576c4bf7868SMarc Eshel release_session(ses); 577c4bf7868SMarc Eshel } 5781da177e4SLinus Torvalds put_nfs4_client(clp); 5791da177e4SLinus Torvalds } 5801da177e4SLinus Torvalds 58135bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 58235bba9a3SJ. Bruce Fields { 5831da177e4SLinus Torvalds struct nfs4_client *clp; 5841da177e4SLinus Torvalds 58535bba9a3SJ. Bruce Fields clp = alloc_client(name); 58635bba9a3SJ. Bruce Fields if (clp == NULL) 58735bba9a3SJ. Bruce Fields return NULL; 588a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 5891da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 5901da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 5911da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 5921da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 593ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 594ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 5959fb87070SMarc Eshel INIT_LIST_HEAD(&clp->cl_sessions); 5961da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 5971da177e4SLinus Torvalds return clp; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 60035bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 60135bba9a3SJ. Bruce Fields { 60235bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 60335bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 6041da177e4SLinus Torvalds } 6051da177e4SLinus Torvalds 60635bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 60735bba9a3SJ. Bruce Fields { 6081da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 6091da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 61235bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 61335bba9a3SJ. Bruce Fields { 6141da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 6151da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 6161da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 6171da177e4SLinus Torvalds get_group_info(target->cr_group_info); 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 62035bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 621599e0a22SJ. Bruce Fields { 622a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds static int 626599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 627599e0a22SJ. Bruce Fields { 628599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 6291da177e4SLinus Torvalds } 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds static int 632599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 633599e0a22SJ. Bruce Fields { 634599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 6351da177e4SLinus Torvalds } 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds /* XXX what about NGROUP */ 6381da177e4SLinus Torvalds static int 639599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 640599e0a22SJ. Bruce Fields { 641599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds 6445ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 6455ec7b46cSJ. Bruce Fields { 6465ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 6475ec7b46cSJ. Bruce Fields 6481da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 6491da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 6501da177e4SLinus Torvalds } 6511da177e4SLinus Torvalds 652deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 653deda2faaSJ. Bruce Fields { 654deda2faaSJ. Bruce Fields static u32 i; 6551da177e4SLinus Torvalds u32 *p; 6561da177e4SLinus Torvalds 6571da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 658deda2faaSJ. Bruce Fields *p++ = get_seconds(); 659deda2faaSJ. Bruce Fields *p++ = i++; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 66235bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 66335bba9a3SJ. Bruce Fields { 6641da177e4SLinus Torvalds if (name.len == 0) 6651da177e4SLinus Torvalds return 0; 6661da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 6672fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 6681da177e4SLinus Torvalds return 0; 6691da177e4SLinus Torvalds } 6701da177e4SLinus Torvalds return 1; 6711da177e4SLinus Torvalds } 6721da177e4SLinus Torvalds 673fd39ca9aSNeilBrown static void 6741da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 6751da177e4SLinus Torvalds { 6761da177e4SLinus Torvalds unsigned int idhashval; 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 6791da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6801da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 6811da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 6821da177e4SLinus Torvalds clp->cl_time = get_seconds(); 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 685fd39ca9aSNeilBrown static void 6861da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 6871da177e4SLinus Torvalds { 6881da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 6891da177e4SLinus Torvalds unsigned int strhashval; 6901da177e4SLinus Torvalds 6911da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 6921da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 693f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 694a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 6951da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 6961da177e4SLinus Torvalds renew_client(clp); 6971da177e4SLinus Torvalds } 6981da177e4SLinus Torvalds 6991da177e4SLinus Torvalds static struct nfs4_client * 7001da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 7011da177e4SLinus Torvalds { 7021da177e4SLinus Torvalds struct nfs4_client *clp; 7031da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 7041da177e4SLinus Torvalds 7051da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 706599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 7071da177e4SLinus Torvalds return clp; 7081da177e4SLinus Torvalds } 7091da177e4SLinus Torvalds return NULL; 7101da177e4SLinus Torvalds } 7111da177e4SLinus Torvalds 7121da177e4SLinus Torvalds static struct nfs4_client * 7131da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 7141da177e4SLinus Torvalds { 7151da177e4SLinus Torvalds struct nfs4_client *clp; 7161da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 719599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 7201da177e4SLinus Torvalds return clp; 7211da177e4SLinus Torvalds } 7221da177e4SLinus Torvalds return NULL; 7231da177e4SLinus Torvalds } 7241da177e4SLinus Torvalds 725a1bcecd2SAndy Adamson /* 726a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 727a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 728a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 729a1bcecd2SAndy Adamson * 730a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 731a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 732a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 733a1bcecd2SAndy Adamson */ 734a1bcecd2SAndy Adamson static inline int 735a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 736a1bcecd2SAndy Adamson { 737a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 738a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 739a1bcecd2SAndy Adamson } 740a1bcecd2SAndy Adamson 74128ce6054SNeilBrown static struct nfs4_client * 742a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 743a1bcecd2SAndy Adamson bool use_exchange_id) 74428ce6054SNeilBrown { 74528ce6054SNeilBrown struct nfs4_client *clp; 74628ce6054SNeilBrown 74728ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 748a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 749a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 75028ce6054SNeilBrown return clp; 75128ce6054SNeilBrown } 75228ce6054SNeilBrown return NULL; 75328ce6054SNeilBrown } 75428ce6054SNeilBrown 75528ce6054SNeilBrown static struct nfs4_client * 756a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 757a1bcecd2SAndy Adamson bool use_exchange_id) 75828ce6054SNeilBrown { 75928ce6054SNeilBrown struct nfs4_client *clp; 76028ce6054SNeilBrown 76128ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 762a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 763a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 76428ce6054SNeilBrown return clp; 76528ce6054SNeilBrown } 76628ce6054SNeilBrown return NULL; 76728ce6054SNeilBrown } 76828ce6054SNeilBrown 7691da177e4SLinus Torvalds /* a helper function for parse_callback */ 7701da177e4SLinus Torvalds static int 7711da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 7721da177e4SLinus Torvalds { 7731da177e4SLinus Torvalds unsigned int len = *lenp; 7741da177e4SLinus Torvalds char *p = *addrp; 7751da177e4SLinus Torvalds int n = -1; 7761da177e4SLinus Torvalds char c; 7771da177e4SLinus Torvalds 7781da177e4SLinus Torvalds for (;;) { 7791da177e4SLinus Torvalds if (!len) 7801da177e4SLinus Torvalds break; 7811da177e4SLinus Torvalds len--; 7821da177e4SLinus Torvalds c = *p++; 7831da177e4SLinus Torvalds if (c == '.') 7841da177e4SLinus Torvalds break; 7851da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 7861da177e4SLinus Torvalds n = -1; 7871da177e4SLinus Torvalds break; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds if (n < 0) 7901da177e4SLinus Torvalds n = 0; 7911da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 7921da177e4SLinus Torvalds if (n > 255) { 7931da177e4SLinus Torvalds n = -1; 7941da177e4SLinus Torvalds break; 7951da177e4SLinus Torvalds } 7961da177e4SLinus Torvalds } 7971da177e4SLinus Torvalds *lenp = len; 7981da177e4SLinus Torvalds *addrp = p; 7991da177e4SLinus Torvalds return n; 8001da177e4SLinus Torvalds } 8011da177e4SLinus Torvalds 8021da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 803fd39ca9aSNeilBrown static int 8041da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 8051da177e4SLinus Torvalds { 8061da177e4SLinus Torvalds int temp = 0; 8071da177e4SLinus Torvalds u32 cbaddr = 0; 8081da177e4SLinus Torvalds u16 cbport = 0; 8091da177e4SLinus Torvalds u32 addrlen = addr_len; 8101da177e4SLinus Torvalds char *addr = addr_val; 8111da177e4SLinus Torvalds int i, shift; 8121da177e4SLinus Torvalds 8131da177e4SLinus Torvalds /* ipaddress */ 8141da177e4SLinus Torvalds shift = 24; 8151da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 8161da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 8171da177e4SLinus Torvalds return 0; 8181da177e4SLinus Torvalds } 8191da177e4SLinus Torvalds cbaddr |= (temp << shift); 8201da177e4SLinus Torvalds if (shift > 0) 8211da177e4SLinus Torvalds shift -= 8; 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds *cbaddrp = cbaddr; 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds /* port */ 8261da177e4SLinus Torvalds shift = 8; 8271da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 8281da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 8291da177e4SLinus Torvalds return 0; 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds cbport |= (temp << shift); 8321da177e4SLinus Torvalds if (shift > 0) 8331da177e4SLinus Torvalds shift -= 8; 8341da177e4SLinus Torvalds } 8351da177e4SLinus Torvalds *cbportp = cbport; 8361da177e4SLinus Torvalds return 1; 8371da177e4SLinus Torvalds } 8381da177e4SLinus Torvalds 839fd39ca9aSNeilBrown static void 8401da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 8411da177e4SLinus Torvalds { 8421da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 8451da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 8461da177e4SLinus Torvalds goto out_err; 8471da177e4SLinus Torvalds 8481da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 8491da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 8501da177e4SLinus Torvalds goto out_err; 8511da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 8521da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 8531da177e4SLinus Torvalds return; 8541da177e4SLinus Torvalds out_err: 855849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 8561da177e4SLinus Torvalds "will not receive delegations\n", 8571da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds return; 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds 862074fe897SAndy Adamson void 863074fe897SAndy Adamson nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) 864074fe897SAndy Adamson { 865074fe897SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 866074fe897SAndy Adamson 867074fe897SAndy Adamson resp->cstate.statp = statp; 868074fe897SAndy Adamson } 869074fe897SAndy Adamson 870074fe897SAndy Adamson /* 871074fe897SAndy Adamson * Dereference the result pages. 872074fe897SAndy Adamson */ 873074fe897SAndy Adamson static void 874074fe897SAndy Adamson nfsd4_release_respages(struct page **respages, short resused) 875074fe897SAndy Adamson { 876074fe897SAndy Adamson int i; 877074fe897SAndy Adamson 878074fe897SAndy Adamson dprintk("--> %s\n", __func__); 879074fe897SAndy Adamson for (i = 0; i < resused; i++) { 880074fe897SAndy Adamson if (!respages[i]) 881074fe897SAndy Adamson continue; 882074fe897SAndy Adamson put_page(respages[i]); 883074fe897SAndy Adamson respages[i] = NULL; 884074fe897SAndy Adamson } 885074fe897SAndy Adamson } 886074fe897SAndy Adamson 887074fe897SAndy Adamson static void 888074fe897SAndy Adamson nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) 889074fe897SAndy Adamson { 890074fe897SAndy Adamson int i; 891074fe897SAndy Adamson 892074fe897SAndy Adamson for (i = 0; i < count; i++) { 893074fe897SAndy Adamson topages[i] = frompages[i]; 894074fe897SAndy Adamson if (!topages[i]) 895074fe897SAndy Adamson continue; 896074fe897SAndy Adamson get_page(topages[i]); 897074fe897SAndy Adamson } 898074fe897SAndy Adamson } 899074fe897SAndy Adamson 900074fe897SAndy Adamson /* 901074fe897SAndy Adamson * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous 902074fe897SAndy Adamson * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total 903074fe897SAndy Adamson * length of the XDR response is less than se_fmaxresp_cached 904074fe897SAndy Adamson * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a 905074fe897SAndy Adamson * of the reply (e.g. readdir). 906074fe897SAndy Adamson * 907074fe897SAndy Adamson * Store the base and length of the rq_req.head[0] page 908074fe897SAndy Adamson * of the NFSv4.1 data, just past the rpc header. 909074fe897SAndy Adamson */ 910074fe897SAndy Adamson void 911074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 912074fe897SAndy Adamson { 913074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 914074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 915074fe897SAndy Adamson struct nfsd4_compoundargs *args = rqstp->rq_argp; 916074fe897SAndy Adamson struct nfsd4_op *op = &args->ops[resp->opcnt]; 917074fe897SAndy Adamson struct kvec *resv = &rqstp->rq_res.head[0]; 918074fe897SAndy Adamson 919074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 920074fe897SAndy Adamson 921074fe897SAndy Adamson /* Don't cache a failed OP_SEQUENCE. */ 922074fe897SAndy Adamson if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) 923074fe897SAndy Adamson return; 924074fe897SAndy Adamson nfsd4_release_respages(entry->ce_respages, entry->ce_resused); 925074fe897SAndy Adamson entry->ce_resused = rqstp->rq_resused; 926074fe897SAndy Adamson if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) 927074fe897SAndy Adamson entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; 928074fe897SAndy Adamson nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, 929074fe897SAndy Adamson entry->ce_resused); 930074fe897SAndy Adamson entry->ce_status = resp->cstate.status; 931074fe897SAndy Adamson entry->ce_datav.iov_base = resp->cstate.statp; 932074fe897SAndy Adamson entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - 933074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0])); 934074fe897SAndy Adamson entry->ce_opcnt = resp->opcnt; 935074fe897SAndy Adamson /* Current request rpc header length*/ 936074fe897SAndy Adamson entry->ce_rpchdrlen = (char *)resp->cstate.statp - 937074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 938074fe897SAndy Adamson } 939074fe897SAndy Adamson 940074fe897SAndy Adamson /* 941074fe897SAndy Adamson * We keep the rpc header, but take the nfs reply from the replycache. 942074fe897SAndy Adamson */ 943074fe897SAndy Adamson static int 944074fe897SAndy Adamson nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, 945074fe897SAndy Adamson struct nfsd4_cache_entry *entry) 946074fe897SAndy Adamson { 947074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 948074fe897SAndy Adamson struct kvec *resv = &resp->rqstp->rq_res.head[0]; 949074fe897SAndy Adamson int len; 950074fe897SAndy Adamson 951074fe897SAndy Adamson /* Current request rpc header length*/ 952074fe897SAndy Adamson len = (char *)resp->cstate.statp - 953074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 954074fe897SAndy Adamson if (entry->ce_datav.iov_len + len > PAGE_SIZE) { 955074fe897SAndy Adamson dprintk("%s v41 cached reply too large (%Zd).\n", __func__, 956074fe897SAndy Adamson entry->ce_datav.iov_len); 957074fe897SAndy Adamson return 0; 958074fe897SAndy Adamson } 959074fe897SAndy Adamson /* copy the cached reply nfsd data past the current rpc header */ 960074fe897SAndy Adamson memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, 961074fe897SAndy Adamson entry->ce_datav.iov_len); 962074fe897SAndy Adamson resv->iov_len = len + entry->ce_datav.iov_len; 963074fe897SAndy Adamson return 1; 964074fe897SAndy Adamson } 965074fe897SAndy Adamson 966074fe897SAndy Adamson /* 967074fe897SAndy Adamson * Keep the first page of the replay. Copy the NFSv4.1 data from the first 968074fe897SAndy Adamson * cached page. Replace any futher replay pages from the cache. 969074fe897SAndy Adamson */ 970074fe897SAndy Adamson __be32 971074fe897SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp) 972074fe897SAndy Adamson { 973074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 974074fe897SAndy Adamson __be32 status; 975074fe897SAndy Adamson 976074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 977074fe897SAndy Adamson 978074fe897SAndy Adamson 979074fe897SAndy Adamson if (!nfsd41_copy_replay_data(resp, entry)) { 980074fe897SAndy Adamson /* 981074fe897SAndy Adamson * Not enough room to use the replay rpc header, send the 982074fe897SAndy Adamson * cached header. Release all the allocated result pages. 983074fe897SAndy Adamson */ 984074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 985074fe897SAndy Adamson nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, 986074fe897SAndy Adamson entry->ce_resused); 987074fe897SAndy Adamson } else { 988074fe897SAndy Adamson /* Release all but the first allocated result page */ 989074fe897SAndy Adamson 990074fe897SAndy Adamson resp->rqstp->rq_resused--; 991074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 992074fe897SAndy Adamson 993074fe897SAndy Adamson nfsd4_copy_pages(&resp->rqstp->rq_respages[1], 994074fe897SAndy Adamson &entry->ce_respages[1], 995074fe897SAndy Adamson entry->ce_resused - 1); 996074fe897SAndy Adamson } 997074fe897SAndy Adamson 998074fe897SAndy Adamson resp->rqstp->rq_resused = entry->ce_resused; 999da3846a2SAndy Adamson resp->opcnt = entry->ce_opcnt; 1000da3846a2SAndy Adamson resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; 1001074fe897SAndy Adamson status = entry->ce_status; 1002074fe897SAndy Adamson 1003074fe897SAndy Adamson return status; 1004074fe897SAndy Adamson } 1005074fe897SAndy Adamson 10060733d213SAndy Adamson /* 10070733d213SAndy Adamson * Set the exchange_id flags returned by the server. 10080733d213SAndy Adamson */ 10090733d213SAndy Adamson static void 10100733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 10110733d213SAndy Adamson { 10120733d213SAndy Adamson /* pNFS is not supported */ 10130733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 10140733d213SAndy Adamson 10150733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 10160733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 10170733d213SAndy Adamson 10180733d213SAndy Adamson /* set the wire flags to return to client. */ 10190733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 10200733d213SAndy Adamson } 10210733d213SAndy Adamson 1022b37ad28bSAl Viro __be32 1023069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1024069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1025069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1026069b6ad4SAndy Adamson { 10270733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 10280733d213SAndy Adamson int status; 10290733d213SAndy Adamson unsigned int strhashval; 10300733d213SAndy Adamson char dname[HEXDIR_LEN]; 10310733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 10320733d213SAndy Adamson u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; 10330733d213SAndy Adamson 10340733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 10350733d213SAndy Adamson " ip_addr=%u flags %x, spa_how %d\n", 10360733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 10370733d213SAndy Adamson ip_addr, exid->flags, exid->spa_how); 10380733d213SAndy Adamson 10390733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 10400733d213SAndy Adamson return nfserr_inval; 10410733d213SAndy Adamson 10420733d213SAndy Adamson /* Currently only support SP4_NONE */ 10430733d213SAndy Adamson switch (exid->spa_how) { 10440733d213SAndy Adamson case SP4_NONE: 10450733d213SAndy Adamson break; 10460733d213SAndy Adamson case SP4_SSV: 10470733d213SAndy Adamson return nfserr_encr_alg_unsupp; 10480733d213SAndy Adamson default: 10490733d213SAndy Adamson BUG(); /* checked by xdr code */ 10500733d213SAndy Adamson case SP4_MACH_CRED: 10510733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 10520733d213SAndy Adamson } 10530733d213SAndy Adamson 10540733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 10550733d213SAndy Adamson 10560733d213SAndy Adamson if (status) 10570733d213SAndy Adamson goto error; 10580733d213SAndy Adamson 10590733d213SAndy Adamson strhashval = clientstr_hashval(dname); 10600733d213SAndy Adamson 10610733d213SAndy Adamson nfs4_lock_state(); 10620733d213SAndy Adamson status = nfs_ok; 10630733d213SAndy Adamson 1064a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 10650733d213SAndy Adamson if (conf) { 10660733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 10670733d213SAndy Adamson /* 18.35.4 case 8 */ 10680733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 10690733d213SAndy Adamson status = nfserr_not_same; 10700733d213SAndy Adamson goto out; 10710733d213SAndy Adamson } 10720733d213SAndy Adamson /* Client reboot: destroy old state */ 10730733d213SAndy Adamson expire_client(conf); 10740733d213SAndy Adamson goto out_new; 10750733d213SAndy Adamson } 10760733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 10770733d213SAndy Adamson /* 18.35.4 case 9 */ 10780733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 10790733d213SAndy Adamson status = nfserr_perm; 10800733d213SAndy Adamson goto out; 10810733d213SAndy Adamson } 10820733d213SAndy Adamson expire_client(conf); 10830733d213SAndy Adamson goto out_new; 10840733d213SAndy Adamson } 10850733d213SAndy Adamson if (ip_addr != conf->cl_addr && 10860733d213SAndy Adamson !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) { 10870733d213SAndy Adamson /* Client collision. 18.35.4 case 3 */ 10880733d213SAndy Adamson status = nfserr_clid_inuse; 10890733d213SAndy Adamson goto out; 10900733d213SAndy Adamson } 10910733d213SAndy Adamson /* 10920733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 10930733d213SAndy Adamson * confirmed client id (18.35.3). 10940733d213SAndy Adamson */ 10950733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 10960733d213SAndy Adamson 10970733d213SAndy Adamson /* 10980733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 10990733d213SAndy Adamson * Leave confirmed record intact and return same result. 11000733d213SAndy Adamson */ 11010733d213SAndy Adamson copy_verf(conf, &verf); 11020733d213SAndy Adamson new = conf; 11030733d213SAndy Adamson goto out_copy; 11040733d213SAndy Adamson } else { 11050733d213SAndy Adamson /* 18.35.4 case 7 */ 11060733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 11070733d213SAndy Adamson status = nfserr_noent; 11080733d213SAndy Adamson goto out; 11090733d213SAndy Adamson } 11100733d213SAndy Adamson } 11110733d213SAndy Adamson 1112a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 11130733d213SAndy Adamson if (unconf) { 11140733d213SAndy Adamson /* 11150733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 11160733d213SAndy Adamson * a new unconfirmed record should be generated regardless 11170733d213SAndy Adamson * of whether any properties have changed. 11180733d213SAndy Adamson */ 11190733d213SAndy Adamson expire_client(unconf); 11200733d213SAndy Adamson } 11210733d213SAndy Adamson 11220733d213SAndy Adamson out_new: 11230733d213SAndy Adamson /* Normal case */ 11240733d213SAndy Adamson new = create_client(exid->clname, dname); 11250733d213SAndy Adamson if (new == NULL) { 11260733d213SAndy Adamson status = nfserr_resource; 11270733d213SAndy Adamson goto out; 11280733d213SAndy Adamson } 11290733d213SAndy Adamson 11300733d213SAndy Adamson copy_verf(new, &verf); 11310733d213SAndy Adamson copy_cred(&new->cl_cred, &rqstp->rq_cred); 11320733d213SAndy Adamson new->cl_addr = ip_addr; 11330733d213SAndy Adamson gen_clid(new); 11340733d213SAndy Adamson gen_confirm(new); 11350733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 11360733d213SAndy Adamson out_copy: 11370733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 11380733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 11390733d213SAndy Adamson 11400733d213SAndy Adamson new->cl_seqid = exid->seqid = 1; 11410733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 11420733d213SAndy Adamson 11430733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 11440733d213SAndy Adamson new->cl_seqid, new->cl_exchange_flags); 11450733d213SAndy Adamson status = nfs_ok; 11460733d213SAndy Adamson 11470733d213SAndy Adamson out: 11480733d213SAndy Adamson nfs4_unlock_state(); 11490733d213SAndy Adamson error: 11500733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 11510733d213SAndy Adamson return status; 1152069b6ad4SAndy Adamson } 1153069b6ad4SAndy Adamson 1154b85d4c01SBenny Halevy static int 1155b85d4c01SBenny Halevy check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) 1156b85d4c01SBenny Halevy { 1157b85d4c01SBenny Halevy dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, 1158b85d4c01SBenny Halevy slot->sl_seqid); 1159b85d4c01SBenny Halevy 1160b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 1161b85d4c01SBenny Halevy if (slot->sl_inuse) { 1162b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1163b85d4c01SBenny Halevy return nfserr_jukebox; 1164b85d4c01SBenny Halevy else 1165b85d4c01SBenny Halevy return nfserr_seq_misordered; 1166b85d4c01SBenny Halevy } 1167b85d4c01SBenny Halevy /* Normal */ 1168b85d4c01SBenny Halevy if (likely(seqid == slot->sl_seqid + 1)) 1169b85d4c01SBenny Halevy return nfs_ok; 1170b85d4c01SBenny Halevy /* Replay */ 1171b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1172b85d4c01SBenny Halevy return nfserr_replay_cache; 1173b85d4c01SBenny Halevy /* Wraparound */ 1174b85d4c01SBenny Halevy if (seqid == 1 && (slot->sl_seqid + 1) == 0) 1175b85d4c01SBenny Halevy return nfs_ok; 1176b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1177b85d4c01SBenny Halevy return nfserr_seq_misordered; 1178b85d4c01SBenny Halevy } 1179b85d4c01SBenny Halevy 1180069b6ad4SAndy Adamson __be32 1181069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1182069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1183069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1184069b6ad4SAndy Adamson { 1185069b6ad4SAndy Adamson return -1; /* stub */ 1186069b6ad4SAndy Adamson } 1187069b6ad4SAndy Adamson 1188069b6ad4SAndy Adamson __be32 1189069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1190069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1191069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1192069b6ad4SAndy Adamson { 1193069b6ad4SAndy Adamson return -1; /* stub */ 1194069b6ad4SAndy Adamson } 1195069b6ad4SAndy Adamson 1196069b6ad4SAndy Adamson __be32 1197b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1198069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1199069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1200069b6ad4SAndy Adamson { 1201f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1202b85d4c01SBenny Halevy struct nfsd4_session *session; 1203b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1204b85d4c01SBenny Halevy int status; 1205b85d4c01SBenny Halevy 1206f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1207f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1208f9bb94c4SAndy Adamson 1209b85d4c01SBenny Halevy spin_lock(&sessionid_lock); 1210b85d4c01SBenny Halevy status = nfserr_badsession; 1211b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1212b85d4c01SBenny Halevy if (!session) 1213b85d4c01SBenny Halevy goto out; 1214b85d4c01SBenny Halevy 1215b85d4c01SBenny Halevy status = nfserr_badslot; 1216b85d4c01SBenny Halevy if (seq->slotid >= session->se_fnumslots) 1217b85d4c01SBenny Halevy goto out; 1218b85d4c01SBenny Halevy 1219b85d4c01SBenny Halevy slot = &session->se_slots[seq->slotid]; 1220b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1221b85d4c01SBenny Halevy 1222b85d4c01SBenny Halevy status = check_slot_seqid(seq->seqid, slot); 1223b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1224b85d4c01SBenny Halevy cstate->slot = slot; 1225b85d4c01SBenny Halevy cstate->session = session; 1226da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1227da3846a2SAndy Adamson * for nfsd4_svc_encode_compoundres processing*/ 1228da3846a2SAndy Adamson status = nfsd4_replay_cache_entry(resp); 1229da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1230b85d4c01SBenny Halevy goto replay_cache; 1231b85d4c01SBenny Halevy } 1232b85d4c01SBenny Halevy if (status) 1233b85d4c01SBenny Halevy goto out; 1234b85d4c01SBenny Halevy 1235b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1236b85d4c01SBenny Halevy slot->sl_inuse = true; 1237b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1238b85d4c01SBenny Halevy 1239b85d4c01SBenny Halevy cstate->slot = slot; 1240b85d4c01SBenny Halevy cstate->session = session; 1241b85d4c01SBenny Halevy 1242b85d4c01SBenny Halevy replay_cache: 1243b85d4c01SBenny Halevy /* Renew the clientid on success and on replay. 1244b85d4c01SBenny Halevy * Hold a session reference until done processing the compound: 1245b85d4c01SBenny Halevy * nfsd4_put_session called only if the cstate slot is set. 1246b85d4c01SBenny Halevy */ 1247b85d4c01SBenny Halevy renew_client(session->se_client); 1248b85d4c01SBenny Halevy nfsd4_get_session(session); 1249b85d4c01SBenny Halevy out: 1250b85d4c01SBenny Halevy spin_unlock(&sessionid_lock); 1251b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1252b85d4c01SBenny Halevy return status; 1253069b6ad4SAndy Adamson } 1254069b6ad4SAndy Adamson 1255069b6ad4SAndy Adamson __be32 1256b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1257b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 12581da177e4SLinus Torvalds { 125927459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 12601da177e4SLinus Torvalds struct xdr_netobj clname = { 12611da177e4SLinus Torvalds .len = setclid->se_namelen, 12621da177e4SLinus Torvalds .data = setclid->se_name, 12631da177e4SLinus Torvalds }; 12641da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 12651da177e4SLinus Torvalds unsigned int strhashval; 126628ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1267b37ad28bSAl Viro __be32 status; 126868e76ad0SOlga Kornievskaia char *princ; 1269a55370a3SNeilBrown char dname[HEXDIR_LEN]; 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds if (!check_name(clname)) 127273aea4ecSNeil Brown return nfserr_inval; 12731da177e4SLinus Torvalds 1274a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1275a55370a3SNeilBrown if (status) 127673aea4ecSNeil Brown return status; 1277a55370a3SNeilBrown 12781da177e4SLinus Torvalds /* 12791da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 12801da177e4SLinus Torvalds * We get here on a DRC miss. 12811da177e4SLinus Torvalds */ 12821da177e4SLinus Torvalds 1283a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds nfs4_lock_state(); 1286a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 128728ce6054SNeilBrown if (conf) { 1288a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 12891da177e4SLinus Torvalds status = nfserr_clid_inuse; 1290026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1291026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client" 1292026722c2SJ. Bruce Fields " at %pI4\n", &conf->cl_addr); 12931da177e4SLinus Torvalds goto out; 12941da177e4SLinus Torvalds } 12951da177e4SLinus Torvalds } 1296a186e767SJ. Bruce Fields /* 1297a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1298a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1299a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1300a186e767SJ. Bruce Fields */ 1301a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 13021da177e4SLinus Torvalds status = nfserr_resource; 13031da177e4SLinus Torvalds if (!conf) { 13041da177e4SLinus Torvalds /* 1305a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1306a186e767SJ. Bruce Fields * placed first, because it is the normal case 13071da177e4SLinus Torvalds */ 13081da177e4SLinus Torvalds if (unconf) 13091da177e4SLinus Torvalds expire_client(unconf); 1310a55370a3SNeilBrown new = create_client(clname, dname); 1311a55370a3SNeilBrown if (new == NULL) 13121da177e4SLinus Torvalds goto out; 13131da177e4SLinus Torvalds gen_clid(new); 1314599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 13151da177e4SLinus Torvalds /* 1316a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1317a186e767SJ. Bruce Fields * probable callback update 13181da177e4SLinus Torvalds */ 131931f4a6c1SNeilBrown if (unconf) { 132031f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 132131f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 132231f4a6c1SNeilBrown * This has the advantage that there is at most 132331f4a6c1SNeilBrown * one {*x***} in either list at any time. 132431f4a6c1SNeilBrown */ 13251da177e4SLinus Torvalds expire_client(unconf); 13261da177e4SLinus Torvalds } 1327a55370a3SNeilBrown new = create_client(clname, dname); 1328a55370a3SNeilBrown if (new == NULL) 13291da177e4SLinus Torvalds goto out; 13301da177e4SLinus Torvalds copy_clid(new, conf); 13311da177e4SLinus Torvalds } else if (!unconf) { 13321da177e4SLinus Torvalds /* 1333a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1334a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1335a186e767SJ. Bruce Fields * confirmed. 13361da177e4SLinus Torvalds */ 1337a55370a3SNeilBrown new = create_client(clname, dname); 1338a55370a3SNeilBrown if (new == NULL) 13391da177e4SLinus Torvalds goto out; 13401da177e4SLinus Torvalds gen_clid(new); 134149ba8781SJ. Bruce Fields } else { 13421da177e4SLinus Torvalds /* 1343a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1344a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1345a186e767SJ. Bruce Fields * confirmed. 13461da177e4SLinus Torvalds */ 13471da177e4SLinus Torvalds expire_client(unconf); 1348a55370a3SNeilBrown new = create_client(clname, dname); 1349a55370a3SNeilBrown if (new == NULL) 13501da177e4SLinus Torvalds goto out; 13511da177e4SLinus Torvalds gen_clid(new); 13521da177e4SLinus Torvalds } 1353c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 1354c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 135561054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 135668e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 135768e76ad0SOlga Kornievskaia if (princ) { 135868e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 135968e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 136068e76ad0SOlga Kornievskaia free_client(new); 136168e76ad0SOlga Kornievskaia goto out; 136268e76ad0SOlga Kornievskaia } 136368e76ad0SOlga Kornievskaia } 1364c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 1365c175b83cSJ. Bruce Fields gen_confirm(new); 1366c175b83cSJ. Bruce Fields gen_callback(new, setclid); 1367c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 13681da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 13691da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 13701da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 13711da177e4SLinus Torvalds status = nfs_ok; 13721da177e4SLinus Torvalds out: 13731da177e4SLinus Torvalds nfs4_unlock_state(); 13741da177e4SLinus Torvalds return status; 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds /* 1379a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1380a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1381a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 13821da177e4SLinus Torvalds */ 1383b37ad28bSAl Viro __be32 1384b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1385b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1386b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 13871da177e4SLinus Torvalds { 138827459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 138921ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 13901da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 13911da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1392b37ad28bSAl Viro __be32 status; 13931da177e4SLinus Torvalds 13941da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 13951da177e4SLinus Torvalds return nfserr_stale_clientid; 13961da177e4SLinus Torvalds /* 13971da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 13981da177e4SLinus Torvalds * We get here on a DRC miss. 13991da177e4SLinus Torvalds */ 14001da177e4SLinus Torvalds 14011da177e4SLinus Torvalds nfs4_lock_state(); 140221ab45a4SNeilBrown 140321ab45a4SNeilBrown conf = find_confirmed_client(clid); 140421ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 140521ab45a4SNeilBrown 140622de4d83SNeilBrown status = nfserr_clid_inuse; 140727459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 14081da177e4SLinus Torvalds goto out; 140927459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 14101da177e4SLinus Torvalds goto out; 141121ab45a4SNeilBrown 1412a186e767SJ. Bruce Fields /* 1413a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1414a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1415a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1416a186e767SJ. Bruce Fields */ 1417366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1418a186e767SJ. Bruce Fields /* 1419a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1420a186e767SJ. Bruce Fields * callback update 14217c79f737SNeilBrown */ 1422599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 14231da177e4SLinus Torvalds status = nfserr_clid_inuse; 14241da177e4SLinus Torvalds else { 14251a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 14261a69c179SNeilBrown * change request correctly. */ 1427cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 142821ab45a4SNeilBrown gen_confirm(conf); 142946309029SNeilBrown nfsd4_remove_clid_dir(unconf); 14301a69c179SNeilBrown expire_client(unconf); 14311da177e4SLinus Torvalds status = nfs_ok; 14321a69c179SNeilBrown 14331da177e4SLinus Torvalds } 1434f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1435a186e767SJ. Bruce Fields /* 1436a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1437a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1438a186e767SJ. Bruce Fields * do nothing. 14397c79f737SNeilBrown */ 1440599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 14411da177e4SLinus Torvalds status = nfserr_clid_inuse; 144221ab45a4SNeilBrown else 14431da177e4SLinus Torvalds status = nfs_ok; 14447c79f737SNeilBrown } else if (!conf && unconf 1445599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1446a186e767SJ. Bruce Fields /* 1447a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1448a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 14491da177e4SLinus Torvalds */ 1450599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 14511da177e4SLinus Torvalds status = nfserr_clid_inuse; 14521da177e4SLinus Torvalds } else { 14531a69c179SNeilBrown unsigned int hash = 14541a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 14551a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1456a1bcecd2SAndy Adamson hash, false); 14571a69c179SNeilBrown if (conf) { 1458c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 14591a69c179SNeilBrown expire_client(conf); 14601a69c179SNeilBrown } 14611da177e4SLinus Torvalds move_to_confirmed(unconf); 146221ab45a4SNeilBrown conf = unconf; 146346f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 14641a69c179SNeilBrown status = nfs_ok; 14651da177e4SLinus Torvalds } 1466599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1467599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 14687c79f737SNeilBrown &confirm)))) { 1469a186e767SJ. Bruce Fields /* 1470a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1471a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 14721da177e4SLinus Torvalds */ 14731da177e4SLinus Torvalds status = nfserr_stale_clientid; 14747c79f737SNeilBrown } else { 14751da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 147622de4d83SNeilBrown status = nfserr_clid_inuse; 147708e8987cSNeilBrown } 14781da177e4SLinus Torvalds out: 14791da177e4SLinus Torvalds nfs4_unlock_state(); 14801da177e4SLinus Torvalds return status; 14811da177e4SLinus Torvalds } 14821da177e4SLinus Torvalds 14831da177e4SLinus Torvalds /* OPEN Share state helper functions */ 14841da177e4SLinus Torvalds static inline struct nfs4_file * 14851da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 14861da177e4SLinus Torvalds { 14871da177e4SLinus Torvalds struct nfs4_file *fp; 14881da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 14891da177e4SLinus Torvalds 1490e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1491e60d4398SNeilBrown if (fp) { 14928b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 14931da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 14948beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 14958beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 14968b671b80SJ. Bruce Fields spin_lock(&recall_lock); 14971da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 14988b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 14991da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 15001da177e4SLinus Torvalds fp->fi_id = current_fileid++; 150147f9940cSMeelap Shah fp->fi_had_conflict = false; 15021da177e4SLinus Torvalds return fp; 15031da177e4SLinus Torvalds } 15041da177e4SLinus Torvalds return NULL; 15051da177e4SLinus Torvalds } 15061da177e4SLinus Torvalds 15071da177e4SLinus Torvalds static void 1508e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1509e60d4398SNeilBrown { 1510e60d4398SNeilBrown if (*slab == NULL) 1511e60d4398SNeilBrown return; 15121a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1513e60d4398SNeilBrown *slab = NULL; 1514e60d4398SNeilBrown } 1515e60d4398SNeilBrown 1516e8ff2a84SJ. Bruce Fields void 1517e60d4398SNeilBrown nfsd4_free_slabs(void) 1518e60d4398SNeilBrown { 1519e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1520e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 15215ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 15225b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1523e60d4398SNeilBrown } 15241da177e4SLinus Torvalds 15251da177e4SLinus Torvalds static int 15261da177e4SLinus Torvalds nfsd4_init_slabs(void) 15271da177e4SLinus Torvalds { 15281da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 152920c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1530e60d4398SNeilBrown if (stateowner_slab == NULL) 1531e60d4398SNeilBrown goto out_nomem; 1532e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 153320c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1534e60d4398SNeilBrown if (file_slab == NULL) 1535e60d4398SNeilBrown goto out_nomem; 15365ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 153720c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 15385ac049acSNeilBrown if (stateid_slab == NULL) 15395ac049acSNeilBrown goto out_nomem; 15405b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 154120c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 15425b2d21c1SNeilBrown if (deleg_slab == NULL) 15435b2d21c1SNeilBrown goto out_nomem; 1544e60d4398SNeilBrown return 0; 1545e60d4398SNeilBrown out_nomem: 1546e60d4398SNeilBrown nfsd4_free_slabs(); 15471da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 15481da177e4SLinus Torvalds return -ENOMEM; 15491da177e4SLinus Torvalds } 15501da177e4SLinus Torvalds 15511da177e4SLinus Torvalds void 15521da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 15531da177e4SLinus Torvalds { 15541da177e4SLinus Torvalds struct nfs4_stateowner *sop = 15551da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 15561da177e4SLinus Torvalds kfree(sop->so_owner.data); 15571da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 15581da177e4SLinus Torvalds } 15591da177e4SLinus Torvalds 15601da177e4SLinus Torvalds static inline struct nfs4_stateowner * 15611da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 15621da177e4SLinus Torvalds { 15631da177e4SLinus Torvalds struct nfs4_stateowner *sop; 15641da177e4SLinus Torvalds 15651da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 15661da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 15671da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 15681da177e4SLinus Torvalds sop->so_owner.len = owner->len; 15691da177e4SLinus Torvalds kref_init(&sop->so_ref); 15701da177e4SLinus Torvalds return sop; 15711da177e4SLinus Torvalds } 15721da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds return NULL; 15751da177e4SLinus Torvalds } 15761da177e4SLinus Torvalds 15771da177e4SLinus Torvalds static struct nfs4_stateowner * 15781da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 15791da177e4SLinus Torvalds struct nfs4_stateowner *sop; 15801da177e4SLinus Torvalds struct nfs4_replay *rp; 15811da177e4SLinus Torvalds unsigned int idhashval; 15821da177e4SLinus Torvalds 15831da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 15841da177e4SLinus Torvalds return NULL; 15851da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 15861da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 15871da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 15881da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1589ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1590ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 15911da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 15921da177e4SLinus Torvalds sop->so_time = 0; 15931da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 15941da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1595ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 15961da177e4SLinus Torvalds sop->so_is_open_owner = 1; 15971da177e4SLinus Torvalds sop->so_id = current_ownerid++; 15981da177e4SLinus Torvalds sop->so_client = clp; 15991da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 16001da177e4SLinus Torvalds sop->so_confirmed = 0; 16011da177e4SLinus Torvalds rp = &sop->so_replay; 1602de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 16031da177e4SLinus Torvalds rp->rp_buflen = 0; 16041da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 16051da177e4SLinus Torvalds return sop; 16061da177e4SLinus Torvalds } 16071da177e4SLinus Torvalds 16081da177e4SLinus Torvalds static inline void 16091da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 16101da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 16111da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 16121da177e4SLinus Torvalds 16131da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1614ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1615ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 16161da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 16171da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1618ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 16198beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 16201da177e4SLinus Torvalds stp->st_stateowner = sop; 162113cd2184SNeilBrown get_nfs4_file(fp); 16221da177e4SLinus Torvalds stp->st_file = fp; 16231da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 16241da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 16251da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 16261da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 16271da177e4SLinus Torvalds stp->st_access_bmap = 0; 16281da177e4SLinus Torvalds stp->st_deny_bmap = 0; 16291da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 16301da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16314c4cd222SNeilBrown stp->st_openstp = NULL; 16321da177e4SLinus Torvalds } 16331da177e4SLinus Torvalds 16341da177e4SLinus Torvalds static void 16351da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 16361da177e4SLinus Torvalds { 16371da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 16381da177e4SLinus Torvalds 1639358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 16401da177e4SLinus Torvalds sop->so_time = get_seconds(); 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds 16431da177e4SLinus Torvalds static int 1644599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1645599e0a22SJ. Bruce Fields clientid_t *clid) 1646599e0a22SJ. Bruce Fields { 1647599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1648599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1649599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 16501da177e4SLinus Torvalds } 16511da177e4SLinus Torvalds 16521da177e4SLinus Torvalds static struct nfs4_stateowner * 16531da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 16541da177e4SLinus Torvalds { 16551da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 16561da177e4SLinus Torvalds 16571da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1658599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 16591da177e4SLinus Torvalds return so; 16601da177e4SLinus Torvalds } 16611da177e4SLinus Torvalds return NULL; 16621da177e4SLinus Torvalds } 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 16651da177e4SLinus Torvalds static struct nfs4_file * 16661da177e4SLinus Torvalds find_file(struct inode *ino) 16671da177e4SLinus Torvalds { 16681da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 16691da177e4SLinus Torvalds struct nfs4_file *fp; 16701da177e4SLinus Torvalds 16718b671b80SJ. Bruce Fields spin_lock(&recall_lock); 16721da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 167313cd2184SNeilBrown if (fp->fi_inode == ino) { 167413cd2184SNeilBrown get_nfs4_file(fp); 16758b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 16761da177e4SLinus Torvalds return fp; 16771da177e4SLinus Torvalds } 167813cd2184SNeilBrown } 16798b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 16801da177e4SLinus Torvalds return NULL; 16811da177e4SLinus Torvalds } 16821da177e4SLinus Torvalds 16838838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1684ba5a6a19SJ. Bruce Fields { 16858838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 16868838dc43SJ. Bruce Fields return 0; 16878838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 16888838dc43SJ. Bruce Fields return 0; 16898838dc43SJ. Bruce Fields return 1; 1690ba5a6a19SJ. Bruce Fields } 1691ba5a6a19SJ. Bruce Fields 16928838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1693ba5a6a19SJ. Bruce Fields { 16948838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 16958838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1696ba5a6a19SJ. Bruce Fields } 16971da177e4SLinus Torvalds 16984f83aa30SJ. Bruce Fields /* 16994f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 17004f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 17014f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 17024f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 17034f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 17044f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 17054f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 17064f83aa30SJ. Bruce Fields * 17074f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 17084f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 17094f83aa30SJ. Bruce Fields * 17104f83aa30SJ. Bruce Fields * OPEN allow read, deny write 17114f83aa30SJ. Bruce Fields * OPEN allow both, deny none 17124f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 17134f83aa30SJ. Bruce Fields * 17144f83aa30SJ. Bruce Fields * which we should reject. 17154f83aa30SJ. Bruce Fields */ 1716fd39ca9aSNeilBrown static void 17171da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 17181da177e4SLinus Torvalds int i; 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds *access = 0; 17211da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 17221da177e4SLinus Torvalds if (test_bit(i, &bmap)) 17231da177e4SLinus Torvalds *access |= i; 17241da177e4SLinus Torvalds } 17251da177e4SLinus Torvalds } 17261da177e4SLinus Torvalds 1727fd39ca9aSNeilBrown static void 17281da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 17291da177e4SLinus Torvalds int i; 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds *deny = 0; 17321da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 17331da177e4SLinus Torvalds if (test_bit(i, &bmap)) 17341da177e4SLinus Torvalds *deny |= i ; 17351da177e4SLinus Torvalds } 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds 17381da177e4SLinus Torvalds static int 17391da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 17401da177e4SLinus Torvalds unsigned int access, deny; 17411da177e4SLinus Torvalds 17421da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 17431da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 17441da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 17451da177e4SLinus Torvalds return 0; 17461da177e4SLinus Torvalds return 1; 17471da177e4SLinus Torvalds } 17481da177e4SLinus Torvalds 17491da177e4SLinus Torvalds /* 17501da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 17511da177e4SLinus Torvalds * WRITE with all zero or all one stateid 17521da177e4SLinus Torvalds */ 1753b37ad28bSAl Viro static __be32 17541da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 17551da177e4SLinus Torvalds { 17561da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17571da177e4SLinus Torvalds struct nfs4_file *fp; 17581da177e4SLinus Torvalds struct nfs4_stateid *stp; 1759b37ad28bSAl Viro __be32 ret; 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 17621da177e4SLinus Torvalds 17631da177e4SLinus Torvalds fp = find_file(ino); 176413cd2184SNeilBrown if (!fp) 176513cd2184SNeilBrown return nfs_ok; 1766b700949bSNeilBrown ret = nfserr_locked; 17671da177e4SLinus Torvalds /* Search for conflicting share reservations */ 17688beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 17691da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 17701da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 177113cd2184SNeilBrown goto out; 17721da177e4SLinus Torvalds } 177313cd2184SNeilBrown ret = nfs_ok; 177413cd2184SNeilBrown out: 177513cd2184SNeilBrown put_nfs4_file(fp); 177613cd2184SNeilBrown return ret; 17771da177e4SLinus Torvalds } 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds static inline void 17801da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 17811da177e4SLinus Torvalds { 17821da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1783aceaf78dSDave Hansen drop_file_write_access(filp); 17841da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds /* 17891da177e4SLinus Torvalds * Recall a delegation 17901da177e4SLinus Torvalds */ 17911da177e4SLinus Torvalds static int 17921da177e4SLinus Torvalds do_recall(void *__dp) 17931da177e4SLinus Torvalds { 17941da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 17951da177e4SLinus Torvalds 179647f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 17971da177e4SLinus Torvalds nfsd4_cb_recall(dp); 17981da177e4SLinus Torvalds return 0; 17991da177e4SLinus Torvalds } 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds /* 18021da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 18031da177e4SLinus Torvalds * by the lease (file_lock) 18041da177e4SLinus Torvalds * 18051da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 18061da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 18071da177e4SLinus Torvalds * lease. 18081da177e4SLinus Torvalds */ 18091da177e4SLinus Torvalds static 18101da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 18111da177e4SLinus Torvalds { 18121da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 18131da177e4SLinus Torvalds struct task_struct *t; 18141da177e4SLinus Torvalds 18151da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 18161da177e4SLinus Torvalds if (!dp) 18171da177e4SLinus Torvalds return; 18181da177e4SLinus Torvalds 18191da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 18201da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 18211da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 18221da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 18231da177e4SLinus Torvalds * it's safe to take a reference: */ 18241da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1825cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds spin_lock(&recall_lock); 18281da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 18291da177e4SLinus Torvalds spin_unlock(&recall_lock); 18301da177e4SLinus Torvalds 18311da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 18321da177e4SLinus Torvalds dp->dl_time = get_seconds(); 18331da177e4SLinus Torvalds 18340272e1fdSJ. Bruce Fields /* 18350272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 18360272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 18370272e1fdSJ. Bruce Fields * in time. 18380272e1fdSJ. Bruce Fields */ 18390272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 18401da177e4SLinus Torvalds 18411da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 18421da177e4SLinus Torvalds if (IS_ERR(t)) { 18431da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 18441da177e4SLinus Torvalds 18451da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 18461da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 18471da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1848cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 18491da177e4SLinus Torvalds nfs4_put_delegation(dp); 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds 18531da177e4SLinus Torvalds /* 18541da177e4SLinus Torvalds * The file_lock is being reapd. 18551da177e4SLinus Torvalds * 18561da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 18571da177e4SLinus Torvalds */ 18581da177e4SLinus Torvalds static 18591da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 18601da177e4SLinus Torvalds { 18611da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 18621da177e4SLinus Torvalds 18631da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 18641da177e4SLinus Torvalds 18651da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 18661da177e4SLinus Torvalds return; 18671da177e4SLinus Torvalds dp->dl_flock = NULL; 18681da177e4SLinus Torvalds } 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds /* 18711da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 18721da177e4SLinus Torvalds * 1873a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 18741da177e4SLinus Torvalds */ 18751da177e4SLinus Torvalds static 18761da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 18771da177e4SLinus Torvalds { 18781da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 18811da177e4SLinus Torvalds if (!dp) 18821da177e4SLinus Torvalds return; 18831da177e4SLinus Torvalds dp->dl_flock = new; 18841da177e4SLinus Torvalds } 18851da177e4SLinus Torvalds 18861da177e4SLinus Torvalds /* 1887a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 18881da177e4SLinus Torvalds */ 18891da177e4SLinus Torvalds static 18901da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 18911da177e4SLinus Torvalds { 18921da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 18931da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 18941da177e4SLinus Torvalds struct nfs4_delegation *tryd = 18951da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 18961da177e4SLinus Torvalds 18971da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 18981da177e4SLinus Torvalds return 0; 18991da177e4SLinus Torvalds 19001da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds 19031da177e4SLinus Torvalds 19041da177e4SLinus Torvalds static 19051da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 19061da177e4SLinus Torvalds { 19071da177e4SLinus Torvalds if (arg & F_UNLCK) 19081da177e4SLinus Torvalds return lease_modify(onlist, arg); 19091da177e4SLinus Torvalds else 19101da177e4SLinus Torvalds return -EAGAIN; 19111da177e4SLinus Torvalds } 19121da177e4SLinus Torvalds 1913fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 19141da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 19151da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 19161da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 19171da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 19181da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 19191da177e4SLinus Torvalds }; 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds 1922b37ad28bSAl Viro __be32 19231da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 19241da177e4SLinus Torvalds { 19251da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 19261da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 19271da177e4SLinus Torvalds unsigned int strhashval; 19281da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 19291da177e4SLinus Torvalds 19301da177e4SLinus Torvalds if (!check_name(open->op_owner)) 19310f442aa2SJ. Bruce Fields return nfserr_inval; 19321da177e4SLinus Torvalds 19331da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 19341da177e4SLinus Torvalds return nfserr_stale_clientid; 19351da177e4SLinus Torvalds 19361da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 19371da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 19381da177e4SLinus Torvalds open->op_stateowner = sop; 19390f442aa2SJ. Bruce Fields if (!sop) { 19400f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 19410f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 19420f442aa2SJ. Bruce Fields if (clp == NULL) 19430f442aa2SJ. Bruce Fields return nfserr_expired; 19440f442aa2SJ. Bruce Fields goto renew; 19450f442aa2SJ. Bruce Fields } 1946ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 19470f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1948ae8b6253SJ. Bruce Fields clp = sop->so_client; 1949f044ff83SJ. Bruce Fields release_openowner(sop); 19500f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1951ae8b6253SJ. Bruce Fields goto renew; 19520f442aa2SJ. Bruce Fields } 19530f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 19541da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1955a90b061cSAl Viro return nfserr_replay_me; 19561da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 19571da177e4SLinus Torvalds * that we don't even have replay data saved! 19581da177e4SLinus Torvalds * Therefore, we have no choice but to continue 19591da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 19601da177e4SLinus Torvalds * fail again for the same reason. 19611da177e4SLinus Torvalds */ 19620f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 19631da177e4SLinus Torvalds goto renew; 19641da177e4SLinus Torvalds } 19650f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 19660f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 19670f442aa2SJ. Bruce Fields renew: 19680f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 19691da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 19701da177e4SLinus Torvalds if (sop == NULL) 19710f442aa2SJ. Bruce Fields return nfserr_resource; 19721da177e4SLinus Torvalds open->op_stateowner = sop; 19730f442aa2SJ. Bruce Fields } 19740f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 19751da177e4SLinus Torvalds renew_client(sop->so_client); 19760f442aa2SJ. Bruce Fields return nfs_ok; 19771da177e4SLinus Torvalds } 19781da177e4SLinus Torvalds 1979b37ad28bSAl Viro static inline __be32 19804a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 19814a6e43e6SNeilBrown { 19824a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 19834a6e43e6SNeilBrown return nfserr_openmode; 19844a6e43e6SNeilBrown else 19854a6e43e6SNeilBrown return nfs_ok; 19864a6e43e6SNeilBrown } 19874a6e43e6SNeilBrown 198852f4fb43SNeilBrown static struct nfs4_delegation * 198952f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 199052f4fb43SNeilBrown { 199152f4fb43SNeilBrown struct nfs4_delegation *dp; 199252f4fb43SNeilBrown 1993ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 199452f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 199552f4fb43SNeilBrown return dp; 199652f4fb43SNeilBrown } 199752f4fb43SNeilBrown return NULL; 199852f4fb43SNeilBrown } 199952f4fb43SNeilBrown 2000b37ad28bSAl Viro static __be32 2001567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2002567d9829SNeilBrown struct nfs4_delegation **dp) 2003567d9829SNeilBrown { 2004567d9829SNeilBrown int flags; 2005b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2006567d9829SNeilBrown 2007567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2008567d9829SNeilBrown if (*dp == NULL) 2009c44c5eebSNeilBrown goto out; 2010567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 2011567d9829SNeilBrown RD_STATE : WR_STATE; 2012567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2013567d9829SNeilBrown if (status) 2014567d9829SNeilBrown *dp = NULL; 2015c44c5eebSNeilBrown out: 2016c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2017c44c5eebSNeilBrown return nfs_ok; 2018c44c5eebSNeilBrown if (status) 2019c44c5eebSNeilBrown return status; 2020c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2021c44c5eebSNeilBrown return nfs_ok; 2022567d9829SNeilBrown } 2023567d9829SNeilBrown 2024b37ad28bSAl Viro static __be32 20251da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 20261da177e4SLinus Torvalds { 20271da177e4SLinus Torvalds struct nfs4_stateid *local; 2028b37ad28bSAl Viro __be32 status = nfserr_share_denied; 20291da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 20301da177e4SLinus Torvalds 20318beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 20321da177e4SLinus Torvalds /* ignore lock owners */ 20331da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 20341da177e4SLinus Torvalds continue; 20351da177e4SLinus Torvalds /* remember if we have seen this open owner */ 20361da177e4SLinus Torvalds if (local->st_stateowner == sop) 20371da177e4SLinus Torvalds *stpp = local; 20381da177e4SLinus Torvalds /* check for conflicting share reservations */ 20391da177e4SLinus Torvalds if (!test_share(local, open)) 20401da177e4SLinus Torvalds goto out; 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds status = 0; 20431da177e4SLinus Torvalds out: 20441da177e4SLinus Torvalds return status; 20451da177e4SLinus Torvalds } 20461da177e4SLinus Torvalds 20475ac049acSNeilBrown static inline struct nfs4_stateid * 20485ac049acSNeilBrown nfs4_alloc_stateid(void) 20495ac049acSNeilBrown { 20505ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 20515ac049acSNeilBrown } 20525ac049acSNeilBrown 2053b37ad28bSAl Viro static __be32 20541da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2055567d9829SNeilBrown struct nfs4_delegation *dp, 20561da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 20571da177e4SLinus Torvalds { 20581da177e4SLinus Torvalds struct nfs4_stateid *stp; 20591da177e4SLinus Torvalds 20605ac049acSNeilBrown stp = nfs4_alloc_stateid(); 20611da177e4SLinus Torvalds if (stp == NULL) 20621da177e4SLinus Torvalds return nfserr_resource; 20631da177e4SLinus Torvalds 2064567d9829SNeilBrown if (dp) { 2065567d9829SNeilBrown get_file(dp->dl_vfs_file); 2066567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 2067567d9829SNeilBrown } else { 2068b37ad28bSAl Viro __be32 status; 2069567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 2070567d9829SNeilBrown &stp->st_vfs_file); 20711da177e4SLinus Torvalds if (status) { 20721da177e4SLinus Torvalds if (status == nfserr_dropit) 20731da177e4SLinus Torvalds status = nfserr_jukebox; 20745ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 20751da177e4SLinus Torvalds return status; 20761da177e4SLinus Torvalds } 2077567d9829SNeilBrown } 20781da177e4SLinus Torvalds *stpp = stp; 20791da177e4SLinus Torvalds return 0; 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds 2082b37ad28bSAl Viro static inline __be32 20831da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 20841da177e4SLinus Torvalds struct nfsd4_open *open) 20851da177e4SLinus Torvalds { 20861da177e4SLinus Torvalds struct iattr iattr = { 20871da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 20881da177e4SLinus Torvalds .ia_size = 0, 20891da177e4SLinus Torvalds }; 20901da177e4SLinus Torvalds if (!open->op_truncate) 20911da177e4SLinus Torvalds return 0; 20921da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 20939246585aSAl Viro return nfserr_inval; 20941da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 20951da177e4SLinus Torvalds } 20961da177e4SLinus Torvalds 2097b37ad28bSAl Viro static __be32 20981da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 20991da177e4SLinus Torvalds { 21001da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 21017eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 21026c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 2103b37ad28bSAl Viro __be32 status; 21041da177e4SLinus Torvalds 21051da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 21066c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 21076c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 21081da177e4SLinus Torvalds 21096c26d08fSJ. Bruce Fields if (new_writer) { 2110b37ad28bSAl Viro int err = get_write_access(inode); 2111b37ad28bSAl Viro if (err) 2112b37ad28bSAl Viro return nfserrno(err); 2113e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 2114e518f056SBenny Halevy if (err) 2115e518f056SBenny Halevy return nfserrno(err); 2116e518f056SBenny Halevy file_take_write(filp); 21176c26d08fSJ. Bruce Fields } 21181da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 21191da177e4SLinus Torvalds if (status) { 21206c26d08fSJ. Bruce Fields if (new_writer) 21211da177e4SLinus Torvalds put_write_access(inode); 21221da177e4SLinus Torvalds return status; 21231da177e4SLinus Torvalds } 21241da177e4SLinus Torvalds /* remember the open */ 21256c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 2126b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 2127b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 21281da177e4SLinus Torvalds 21291da177e4SLinus Torvalds return nfs_ok; 21301da177e4SLinus Torvalds } 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds 21331da177e4SLinus Torvalds static void 213437515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 21351da177e4SLinus Torvalds { 21361da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2137c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 21381da177e4SLinus Torvalds } 21391da177e4SLinus Torvalds 21401da177e4SLinus Torvalds /* 21411da177e4SLinus Torvalds * Attempt to hand out a delegation. 21421da177e4SLinus Torvalds */ 21431da177e4SLinus Torvalds static void 21441da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 21451da177e4SLinus Torvalds { 21461da177e4SLinus Torvalds struct nfs4_delegation *dp; 21471da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21481da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 21491da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 21501da177e4SLinus Torvalds int status, flag = 0; 21511da177e4SLinus Torvalds 21521da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 21537b190fecSNeilBrown open->op_recall = 0; 21547b190fecSNeilBrown switch (open->op_claim_type) { 21557b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 21567b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 21577b190fecSNeilBrown open->op_recall = 1; 21587b190fecSNeilBrown flag = open->op_delegate_type; 21597b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 21601da177e4SLinus Torvalds goto out; 21617b190fecSNeilBrown break; 21627b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 21637b190fecSNeilBrown /* Let's not give out any delegations till everyone's 21647b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2165af558e33SJ. Bruce Fields if (locks_in_grace()) 21667b190fecSNeilBrown goto out; 21677b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 21687b190fecSNeilBrown goto out; 21691da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 21701da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 21711da177e4SLinus Torvalds else 21721da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 21737b190fecSNeilBrown break; 21747b190fecSNeilBrown default: 21757b190fecSNeilBrown goto out; 21767b190fecSNeilBrown } 21771da177e4SLinus Torvalds 21781da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 21791da177e4SLinus Torvalds if (dp == NULL) { 21801da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 21811da177e4SLinus Torvalds goto out; 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds locks_init_lock(&fl); 21841da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 21851da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 21869167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 21871da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 21881da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 21891da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 21901da177e4SLinus Torvalds fl.fl_pid = current->tgid; 21911da177e4SLinus Torvalds 2192a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 21931da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 21941da177e4SLinus Torvalds */ 21959167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 21961da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2197c907132dSNeilBrown unhash_delegation(dp); 21981da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 21991da177e4SLinus Torvalds goto out; 22001da177e4SLinus Torvalds } 22011da177e4SLinus Torvalds 22021da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 22031da177e4SLinus Torvalds 22041da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 22051da177e4SLinus Torvalds dp->dl_stateid.si_boot, 22061da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 22071da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 22081da177e4SLinus Torvalds dp->dl_stateid.si_generation); 22091da177e4SLinus Torvalds out: 22107b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 22117b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 22127b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 22132fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 22141da177e4SLinus Torvalds open->op_delegate_type = flag; 22151da177e4SLinus Torvalds } 22161da177e4SLinus Torvalds 22171da177e4SLinus Torvalds /* 22181da177e4SLinus Torvalds * called with nfs4_lock_state() held. 22191da177e4SLinus Torvalds */ 2220b37ad28bSAl Viro __be32 22211da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 22221da177e4SLinus Torvalds { 22231da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 22241da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 22251da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2226567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2227b37ad28bSAl Viro __be32 status; 22281da177e4SLinus Torvalds 22291da177e4SLinus Torvalds status = nfserr_inval; 2230ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 2231ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 22321da177e4SLinus Torvalds goto out; 22331da177e4SLinus Torvalds /* 22341da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 22351da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 22361da177e4SLinus Torvalds * If not found, create the nfs4_file struct 22371da177e4SLinus Torvalds */ 22381da177e4SLinus Torvalds fp = find_file(ino); 22391da177e4SLinus Torvalds if (fp) { 22401da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 22411da177e4SLinus Torvalds goto out; 2242c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2243c44c5eebSNeilBrown if (status) 2244c44c5eebSNeilBrown goto out; 22451da177e4SLinus Torvalds } else { 2246c44c5eebSNeilBrown status = nfserr_bad_stateid; 2247c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2248c44c5eebSNeilBrown goto out; 22491da177e4SLinus Torvalds status = nfserr_resource; 22501da177e4SLinus Torvalds fp = alloc_init_file(ino); 22511da177e4SLinus Torvalds if (fp == NULL) 22521da177e4SLinus Torvalds goto out; 22531da177e4SLinus Torvalds } 22541da177e4SLinus Torvalds 22551da177e4SLinus Torvalds /* 22561da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 22571da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 22581da177e4SLinus Torvalds */ 22591da177e4SLinus Torvalds if (stp) { 22601da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 22611da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 22621da177e4SLinus Torvalds if (status) 22631da177e4SLinus Torvalds goto out; 2264444c2c07SNeilBrown update_stateid(&stp->st_stateid); 22651da177e4SLinus Torvalds } else { 22661da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 22671da177e4SLinus Torvalds int flags = 0; 22689ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 22698837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 22701da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 22718837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 2272567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 2273567d9829SNeilBrown if (status) 22741da177e4SLinus Torvalds goto out; 22751da177e4SLinus Torvalds init_stateid(stp, fp, open); 22761da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 22771da177e4SLinus Torvalds if (status) { 22782283963fSJ. Bruce Fields release_open_stateid(stp); 22791da177e4SLinus Torvalds goto out; 22801da177e4SLinus Torvalds } 22811da177e4SLinus Torvalds } 22821da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 22831da177e4SLinus Torvalds 22841da177e4SLinus Torvalds /* 22851da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 22861da177e4SLinus Torvalds * OPEN succeeds even if we fail. 22871da177e4SLinus Torvalds */ 22881da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds status = nfs_ok; 22911da177e4SLinus Torvalds 22921da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 22931da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 22941da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 22951da177e4SLinus Torvalds out: 229613cd2184SNeilBrown if (fp) 229713cd2184SNeilBrown put_nfs4_file(fp); 229837515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 229937515177SNeilBrown nfs4_set_claim_prev(open); 23001da177e4SLinus Torvalds /* 23011da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 23021da177e4SLinus Torvalds */ 23031da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 23041da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 23051da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds return status; 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds 2310b37ad28bSAl Viro __be32 2311b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2312b591480bSJ.Bruce Fields clientid_t *clid) 23131da177e4SLinus Torvalds { 23141da177e4SLinus Torvalds struct nfs4_client *clp; 2315b37ad28bSAl Viro __be32 status; 23161da177e4SLinus Torvalds 23171da177e4SLinus Torvalds nfs4_lock_state(); 23181da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 23191da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 23201da177e4SLinus Torvalds status = nfserr_stale_clientid; 23211da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 23221da177e4SLinus Torvalds goto out; 23231da177e4SLinus Torvalds clp = find_confirmed_client(clid); 23241da177e4SLinus Torvalds status = nfserr_expired; 23251da177e4SLinus Torvalds if (clp == NULL) { 23261da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 23271da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 23281da177e4SLinus Torvalds goto out; 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds renew_client(clp); 23311da177e4SLinus Torvalds status = nfserr_cb_path_down; 2332ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 23331da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 23341da177e4SLinus Torvalds goto out; 23351da177e4SLinus Torvalds status = nfs_ok; 23361da177e4SLinus Torvalds out: 23371da177e4SLinus Torvalds nfs4_unlock_state(); 23381da177e4SLinus Torvalds return status; 23391da177e4SLinus Torvalds } 23401da177e4SLinus Torvalds 2341af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2342af558e33SJ. Bruce Fields }; 2343af558e33SJ. Bruce Fields 2344a76b4319SNeilBrown static void 2345af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2346a76b4319SNeilBrown { 2347a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2348c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2349af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2350a76b4319SNeilBrown } 2351a76b4319SNeilBrown 2352fd39ca9aSNeilBrown static time_t 23531da177e4SLinus Torvalds nfs4_laundromat(void) 23541da177e4SLinus Torvalds { 23551da177e4SLinus Torvalds struct nfs4_client *clp; 23561da177e4SLinus Torvalds struct nfs4_stateowner *sop; 23571da177e4SLinus Torvalds struct nfs4_delegation *dp; 23581da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 23591da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 23601da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 23611da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 23621da177e4SLinus Torvalds 23631da177e4SLinus Torvalds nfs4_lock_state(); 23641da177e4SLinus Torvalds 23651da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2366af558e33SJ. Bruce Fields if (locks_in_grace()) 2367af558e33SJ. Bruce Fields nfsd4_end_grace(); 23681da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 23691da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 23701da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 23711da177e4SLinus Torvalds t = clp->cl_time - cutoff; 23721da177e4SLinus Torvalds if (clientid_val > t) 23731da177e4SLinus Torvalds clientid_val = t; 23741da177e4SLinus Torvalds break; 23751da177e4SLinus Torvalds } 23761da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 23771da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2378c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 23791da177e4SLinus Torvalds expire_client(clp); 23801da177e4SLinus Torvalds } 23811da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 23821da177e4SLinus Torvalds spin_lock(&recall_lock); 23831da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 23841da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 23851da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 23861da177e4SLinus Torvalds u = dp->dl_time - cutoff; 23871da177e4SLinus Torvalds if (test_val > u) 23881da177e4SLinus Torvalds test_val = u; 23891da177e4SLinus Torvalds break; 23901da177e4SLinus Torvalds } 23911da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 23921da177e4SLinus Torvalds dp, dp->dl_flock); 23931da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 23941da177e4SLinus Torvalds } 23951da177e4SLinus Torvalds spin_unlock(&recall_lock); 23961da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 23971da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 23981da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 23991da177e4SLinus Torvalds unhash_delegation(dp); 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 24021da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 24031da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 24041da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 24051da177e4SLinus Torvalds u = sop->so_time - cutoff; 24061da177e4SLinus Torvalds if (test_val > u) 24071da177e4SLinus Torvalds test_val = u; 24081da177e4SLinus Torvalds break; 24091da177e4SLinus Torvalds } 24101da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 24111da177e4SLinus Torvalds sop->so_id); 2412f044ff83SJ. Bruce Fields release_openowner(sop); 24131da177e4SLinus Torvalds } 24141da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 24151da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 24161da177e4SLinus Torvalds nfs4_unlock_state(); 24171da177e4SLinus Torvalds return clientid_val; 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 2420a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2421a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2422a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2423a254b246SHarvey Harrison 2424a254b246SHarvey Harrison static void 2425c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 24261da177e4SLinus Torvalds { 24271da177e4SLinus Torvalds time_t t; 24281da177e4SLinus Torvalds 24291da177e4SLinus Torvalds t = nfs4_laundromat(); 24301da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 243158da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 24321da177e4SLinus Torvalds } 24331da177e4SLinus Torvalds 2434fd39ca9aSNeilBrown static struct nfs4_stateowner * 2435f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2436f8816512SNeilBrown { 24371da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 24381da177e4SLinus Torvalds 24391da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 24401da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 24411da177e4SLinus Torvalds if (local->so_id == st_id) 24421da177e4SLinus Torvalds return local; 24431da177e4SLinus Torvalds } 24441da177e4SLinus Torvalds } 24451da177e4SLinus Torvalds return NULL; 24461da177e4SLinus Torvalds } 24471da177e4SLinus Torvalds 24481da177e4SLinus Torvalds static inline int 24491da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 24501da177e4SLinus Torvalds { 24517eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 24521da177e4SLinus Torvalds } 24531da177e4SLinus Torvalds 24541da177e4SLinus Torvalds static int 24551da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 24561da177e4SLinus Torvalds { 24571da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 24581da177e4SLinus Torvalds return 0; 2459849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 24601da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 24611da177e4SLinus Torvalds stateid->si_generation); 24621da177e4SLinus Torvalds return 1; 24631da177e4SLinus Torvalds } 24641da177e4SLinus Torvalds 24651da177e4SLinus Torvalds static inline int 24661da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 24671da177e4SLinus Torvalds { 24681da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 24691da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 24701da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 24711da177e4SLinus Torvalds } 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds static inline int 24741da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 24751da177e4SLinus Torvalds { 24761da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 24771da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds 24801da177e4SLinus Torvalds static 2481b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 24821da177e4SLinus Torvalds { 2483b37ad28bSAl Viro __be32 status = nfserr_openmode; 24841da177e4SLinus Torvalds 24851da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 24861da177e4SLinus Torvalds goto out; 24871da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 24881da177e4SLinus Torvalds goto out; 24891da177e4SLinus Torvalds status = nfs_ok; 24901da177e4SLinus Torvalds out: 24911da177e4SLinus Torvalds return status; 24921da177e4SLinus Torvalds } 24931da177e4SLinus Torvalds 2494b37ad28bSAl Viro static inline __be32 24951da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 24961da177e4SLinus Torvalds { 2497203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 24981da177e4SLinus Torvalds return nfs_ok; 2499af558e33SJ. Bruce Fields else if (locks_in_grace()) { 25001da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 25011da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 25021da177e4SLinus Torvalds return nfserr_grace; 25031da177e4SLinus Torvalds } else if (flags & WR_STATE) 25041da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 25051da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 25061da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 25071da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 25081da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 25091da177e4SLinus Torvalds } 25101da177e4SLinus Torvalds 25111da177e4SLinus Torvalds /* 25121da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 25131da177e4SLinus Torvalds * that are not able to provide mandatory locking. 25141da177e4SLinus Torvalds */ 25151da177e4SLinus Torvalds static inline int 251618f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 25171da177e4SLinus Torvalds { 2518203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 25191da177e4SLinus Torvalds } 25201da177e4SLinus Torvalds 25210836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 25220836f587SJ. Bruce Fields { 25230836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 25240836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 25250836f587SJ. Bruce Fields return nfserr_bad_stateid; 25260836f587SJ. Bruce Fields /* 25270836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 25280836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 25290836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 25300836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 25310836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 25320836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 25330836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 25340836f587SJ. Bruce Fields * will just have to retry the IO: 25350836f587SJ. Bruce Fields */ 25360836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 25370836f587SJ. Bruce Fields return nfserr_old_stateid; 25380836f587SJ. Bruce Fields return nfs_ok; 25390836f587SJ. Bruce Fields } 25400836f587SJ. Bruce Fields 25413e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 25423e633079SJ. Bruce Fields { 25433e633079SJ. Bruce Fields return stateid->si_fileid == 0; 25443e633079SJ. Bruce Fields } 25453e633079SJ. Bruce Fields 25461da177e4SLinus Torvalds /* 25471da177e4SLinus Torvalds * Checks for stateid operations 25481da177e4SLinus Torvalds */ 2549b37ad28bSAl Viro __be32 25501da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 25511da177e4SLinus Torvalds { 25521da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 25531da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 25541da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2555b37ad28bSAl Viro __be32 status; 25561da177e4SLinus Torvalds 25571da177e4SLinus Torvalds if (filpp) 25581da177e4SLinus Torvalds *filpp = NULL; 25591da177e4SLinus Torvalds 256018f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 25611da177e4SLinus Torvalds return nfserr_grace; 25621da177e4SLinus Torvalds 25631da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 25641da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 25651da177e4SLinus Torvalds 25661da177e4SLinus Torvalds status = nfserr_stale_stateid; 25671da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 25681da177e4SLinus Torvalds goto out; 25691da177e4SLinus Torvalds 25701da177e4SLinus Torvalds status = nfserr_bad_stateid; 25713e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2572a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 2573819a8f53SJ. Bruce Fields if (!dp) 25741da177e4SLinus Torvalds goto out; 2575fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 25760c2a498fSJ. Bruce Fields if (status) 25770c2a498fSJ. Bruce Fields goto out; 2578dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2579dc9bf700SJ. Bruce Fields if (status) 2580dc9bf700SJ. Bruce Fields goto out; 2581dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2582dc9bf700SJ. Bruce Fields if (filpp) 2583dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 25841da177e4SLinus Torvalds } else { /* open or lock stateid */ 2585a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 2586819a8f53SJ. Bruce Fields if (!stp) 25871da177e4SLinus Torvalds goto out; 25886150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 25891da177e4SLinus Torvalds goto out; 25901da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 25911da177e4SLinus Torvalds goto out; 2592fd03b099SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 25930836f587SJ. Bruce Fields if (status) 25941da177e4SLinus Torvalds goto out; 2595a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2596a4455be0SJ. Bruce Fields if (status) 25971da177e4SLinus Torvalds goto out; 25981da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 25991da177e4SLinus Torvalds if (filpp) 26001da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 26011da177e4SLinus Torvalds } 26021da177e4SLinus Torvalds status = nfs_ok; 26031da177e4SLinus Torvalds out: 26041da177e4SLinus Torvalds return status; 26051da177e4SLinus Torvalds } 26061da177e4SLinus Torvalds 26074c4cd222SNeilBrown static inline int 26084c4cd222SNeilBrown setlkflg (int type) 26094c4cd222SNeilBrown { 26104c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 26114c4cd222SNeilBrown RD_STATE : WR_STATE; 26124c4cd222SNeilBrown } 26131da177e4SLinus Torvalds 26141da177e4SLinus Torvalds /* 26151da177e4SLinus Torvalds * Checks for sequence id mutating operations. 26161da177e4SLinus Torvalds */ 2617b37ad28bSAl Viro static __be32 26184c4cd222SNeilBrown 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) 26191da177e4SLinus Torvalds { 26201da177e4SLinus Torvalds struct nfs4_stateid *stp; 26211da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26220836f587SJ. Bruce Fields __be32 status; 26231da177e4SLinus Torvalds 26241da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 26251da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 26261da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 26271da177e4SLinus Torvalds stateid->si_generation); 26281da177e4SLinus Torvalds 26291da177e4SLinus Torvalds *stpp = NULL; 26301da177e4SLinus Torvalds *sopp = NULL; 26311da177e4SLinus Torvalds 26321da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 26332fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 26343a4f98bbSNeilBrown return nfserr_bad_stateid; 26351da177e4SLinus Torvalds } 26361da177e4SLinus Torvalds 26371da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 26383a4f98bbSNeilBrown return nfserr_stale_stateid; 26391da177e4SLinus Torvalds /* 26401da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 26411da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 26421da177e4SLinus Torvalds * number is incorrect. 26431da177e4SLinus Torvalds */ 2644f8816512SNeilBrown stp = find_stateid(stateid, flags); 2645f8816512SNeilBrown if (stp == NULL) { 2646f8816512SNeilBrown /* 2647f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2648f8816512SNeilBrown * a replayed close: 2649f8816512SNeilBrown */ 2650f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2651f8816512SNeilBrown if (sop == NULL) 2652f8816512SNeilBrown return nfserr_bad_stateid; 2653f8816512SNeilBrown *sopp = sop; 2654f8816512SNeilBrown goto check_replay; 2655f8816512SNeilBrown } 26561da177e4SLinus Torvalds 265739325bd0SJ. Bruce Fields *stpp = stp; 265839325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 265939325bd0SJ. Bruce Fields 26604c4cd222SNeilBrown if (lock) { 26614c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 26621da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 26634c4cd222SNeilBrown int lkflg = 0; 2664b37ad28bSAl Viro __be32 status; 26651da177e4SLinus Torvalds 26664c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 26674c4cd222SNeilBrown 26684c4cd222SNeilBrown if (lock->lk_is_new) { 26691da177e4SLinus Torvalds if (!sop->so_is_open_owner) 26703a4f98bbSNeilBrown return nfserr_bad_stateid; 2671599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 26723a4f98bbSNeilBrown return nfserr_bad_stateid; 26734c4cd222SNeilBrown /* stp is the open stateid */ 26744c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 26754c4cd222SNeilBrown if (status) 26764c4cd222SNeilBrown return status; 26774c4cd222SNeilBrown } else { 26784c4cd222SNeilBrown /* stp is the lock stateid */ 26794c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 26804c4cd222SNeilBrown if (status) 26814c4cd222SNeilBrown return status; 26824c4cd222SNeilBrown } 26831da177e4SLinus Torvalds } 26841da177e4SLinus Torvalds 2685f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 26862fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 26873a4f98bbSNeilBrown return nfserr_bad_stateid; 26881da177e4SLinus Torvalds } 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds /* 26911da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 26921da177e4SLinus Torvalds * For the moment, we ignore the possibility of 26931da177e4SLinus Torvalds * generation number wraparound. 26941da177e4SLinus Torvalds */ 2695bd9aac52SNeilBrown if (seqid != sop->so_seqid) 26961da177e4SLinus Torvalds goto check_replay; 26971da177e4SLinus Torvalds 26983a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 26992fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 27003a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 27013a4f98bbSNeilBrown return nfserr_bad_stateid; 27021da177e4SLinus Torvalds } 27033a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 27042fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 27053a4f98bbSNeilBrown " confirmed yet!\n"); 27063a4f98bbSNeilBrown return nfserr_bad_stateid; 27071da177e4SLinus Torvalds } 27080836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 27090836f587SJ. Bruce Fields if (status) 27100836f587SJ. Bruce Fields return status; 271152fd004eSNeilBrown renew_client(sop->so_client); 27123a4f98bbSNeilBrown return nfs_ok; 27131da177e4SLinus Torvalds 27141da177e4SLinus Torvalds check_replay: 2715bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2716849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 27171da177e4SLinus Torvalds /* indicate replay to calling function */ 2718a90b061cSAl Viro return nfserr_replay_me; 27191da177e4SLinus Torvalds } 27202fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 27213a4f98bbSNeilBrown sop->so_seqid, seqid); 27223a4f98bbSNeilBrown *sopp = NULL; 27233a4f98bbSNeilBrown return nfserr_bad_seqid; 27241da177e4SLinus Torvalds } 27251da177e4SLinus Torvalds 2726b37ad28bSAl Viro __be32 2727ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2728a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 27291da177e4SLinus Torvalds { 2730b37ad28bSAl Viro __be32 status; 27311da177e4SLinus Torvalds struct nfs4_stateowner *sop; 27321da177e4SLinus Torvalds struct nfs4_stateid *stp; 27331da177e4SLinus Torvalds 27341da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2735ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2736ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 27371da177e4SLinus Torvalds 2738ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2739a8cddc5dSJ. Bruce Fields if (status) 2740a8cddc5dSJ. Bruce Fields return status; 27411da177e4SLinus Torvalds 27421da177e4SLinus Torvalds nfs4_lock_state(); 27431da177e4SLinus Torvalds 2744ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2745ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2746f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 27471da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 27481da177e4SLinus Torvalds goto out; 27491da177e4SLinus Torvalds 27501da177e4SLinus Torvalds sop = oc->oc_stateowner; 27511da177e4SLinus Torvalds sop->so_confirmed = 1; 27521da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 27531da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 27541da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 27551da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 27561da177e4SLinus Torvalds stp->st_stateid.si_boot, 27571da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 27581da177e4SLinus Torvalds stp->st_stateid.si_fileid, 27591da177e4SLinus Torvalds stp->st_stateid.si_generation); 2760c7b9a459SNeilBrown 2761c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 27621da177e4SLinus Torvalds out: 2763f2327d9aSNeil Brown if (oc->oc_stateowner) { 27641da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2765a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2766f2327d9aSNeil Brown } 27671da177e4SLinus Torvalds nfs4_unlock_state(); 27681da177e4SLinus Torvalds return status; 27691da177e4SLinus Torvalds } 27701da177e4SLinus Torvalds 27711da177e4SLinus Torvalds 27721da177e4SLinus Torvalds /* 27731da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 27741da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 27751da177e4SLinus Torvalds */ 27761da177e4SLinus Torvalds static void 27771da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 27781da177e4SLinus Torvalds { 27791da177e4SLinus Torvalds int i; 27801da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 27811da177e4SLinus Torvalds if ((i & access) != i) 27821da177e4SLinus Torvalds __clear_bit(i, bmap); 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds } 27851da177e4SLinus Torvalds 27861da177e4SLinus Torvalds static void 27871da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 27881da177e4SLinus Torvalds { 27891da177e4SLinus Torvalds int i; 27901da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 27911da177e4SLinus Torvalds if ((i & deny) != i) 27921da177e4SLinus Torvalds __clear_bit(i, bmap); 27931da177e4SLinus Torvalds } 27941da177e4SLinus Torvalds } 27951da177e4SLinus Torvalds 2796b37ad28bSAl Viro __be32 2797ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2798ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2799a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 28001da177e4SLinus Torvalds { 2801b37ad28bSAl Viro __be32 status; 28021da177e4SLinus Torvalds struct nfs4_stateid *stp; 28031da177e4SLinus Torvalds unsigned int share_access; 28041da177e4SLinus Torvalds 28051da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2806ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2807ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 28081da177e4SLinus Torvalds 2809ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2810ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 28111da177e4SLinus Torvalds return nfserr_inval; 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds nfs4_lock_state(); 2814ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2815ca364317SJ.Bruce Fields od->od_seqid, 28161da177e4SLinus Torvalds &od->od_stateid, 2817f3362737SJ. Bruce Fields OPEN_STATE, 28181da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 28191da177e4SLinus Torvalds goto out; 28201da177e4SLinus Torvalds 28211da177e4SLinus Torvalds status = nfserr_inval; 28221da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 28231da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 28241da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 28251da177e4SLinus Torvalds goto out; 28261da177e4SLinus Torvalds } 28271da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 28281da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 28291da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 28301da177e4SLinus Torvalds goto out; 28311da177e4SLinus Torvalds } 28321da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 28331da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 28341da177e4SLinus Torvalds share_access & ~od->od_share_access); 28351da177e4SLinus Torvalds 28361da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 28371da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 28381da177e4SLinus Torvalds 28391da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 28401da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 28411da177e4SLinus Torvalds status = nfs_ok; 28421da177e4SLinus Torvalds out: 2843f2327d9aSNeil Brown if (od->od_stateowner) { 28441da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2845a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2846f2327d9aSNeil Brown } 28471da177e4SLinus Torvalds nfs4_unlock_state(); 28481da177e4SLinus Torvalds return status; 28491da177e4SLinus Torvalds } 28501da177e4SLinus Torvalds 28511da177e4SLinus Torvalds /* 28521da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 28531da177e4SLinus Torvalds */ 2854b37ad28bSAl Viro __be32 2855ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2856a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 28571da177e4SLinus Torvalds { 2858b37ad28bSAl Viro __be32 status; 28591da177e4SLinus Torvalds struct nfs4_stateid *stp; 28601da177e4SLinus Torvalds 28611da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2862ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2863ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 28641da177e4SLinus Torvalds 28651da177e4SLinus Torvalds nfs4_lock_state(); 28661da177e4SLinus Torvalds /* check close_lru for replay */ 2867ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2868ca364317SJ.Bruce Fields close->cl_seqid, 28691da177e4SLinus Torvalds &close->cl_stateid, 2870f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 28711da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 28721da177e4SLinus Torvalds goto out; 28731da177e4SLinus Torvalds status = nfs_ok; 28741da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 28751da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 28761da177e4SLinus Torvalds 287704ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 28782283963fSJ. Bruce Fields release_open_stateid(stp); 287904ef5954SJ. Bruce Fields 288004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 288104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 288204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 288304ef5954SJ. Bruce Fields */ 288404ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 288504ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 28861da177e4SLinus Torvalds out: 2887f2327d9aSNeil Brown if (close->cl_stateowner) { 28881da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2889a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2890f2327d9aSNeil Brown } 28911da177e4SLinus Torvalds nfs4_unlock_state(); 28921da177e4SLinus Torvalds return status; 28931da177e4SLinus Torvalds } 28941da177e4SLinus Torvalds 2895b37ad28bSAl Viro __be32 2896ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2897ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 28981da177e4SLinus Torvalds { 2899203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 2900203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 2901203a8c8eSJ. Bruce Fields struct inode *inode; 2902b37ad28bSAl Viro __be32 status; 29031da177e4SLinus Torvalds 2904ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 2905203a8c8eSJ. Bruce Fields return status; 2906203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 29071da177e4SLinus Torvalds 29081da177e4SLinus Torvalds nfs4_lock_state(); 2909203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 2910203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 2911203a8c8eSJ. Bruce Fields goto out; 2912203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 2913203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 2914203a8c8eSJ. Bruce Fields goto out; 29157e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 2916203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 2917203a8c8eSJ. Bruce Fields goto out; 2918203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 2919203a8c8eSJ. Bruce Fields if (!dp) 2920203a8c8eSJ. Bruce Fields goto out; 2921203a8c8eSJ. Bruce Fields status = check_stateid_generation(stateid, &dp->dl_stateid); 2922203a8c8eSJ. Bruce Fields if (status) 2923203a8c8eSJ. Bruce Fields goto out; 2924203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 2925203a8c8eSJ. Bruce Fields 2926203a8c8eSJ. Bruce Fields unhash_delegation(dp); 29271da177e4SLinus Torvalds out: 2928203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 2929203a8c8eSJ. Bruce Fields 29301da177e4SLinus Torvalds return status; 29311da177e4SLinus Torvalds } 29321da177e4SLinus Torvalds 29331da177e4SLinus Torvalds 29341da177e4SLinus Torvalds /* 29351da177e4SLinus Torvalds * Lock owner state (byte-range locks) 29361da177e4SLinus Torvalds */ 29371da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 29381da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 29391da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 29401da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 29411da177e4SLinus Torvalds 294287df4de8SBenny Halevy static inline u64 294387df4de8SBenny Halevy end_offset(u64 start, u64 len) 294487df4de8SBenny Halevy { 294587df4de8SBenny Halevy u64 end; 294687df4de8SBenny Halevy 294787df4de8SBenny Halevy end = start + len; 294887df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 294987df4de8SBenny Halevy } 295087df4de8SBenny Halevy 295187df4de8SBenny Halevy /* last octet in a range */ 295287df4de8SBenny Halevy static inline u64 295387df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 295487df4de8SBenny Halevy { 295587df4de8SBenny Halevy u64 end; 295687df4de8SBenny Halevy 295787df4de8SBenny Halevy BUG_ON(!len); 295887df4de8SBenny Halevy end = start + len; 295987df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 296087df4de8SBenny Halevy } 296187df4de8SBenny Halevy 29621da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 29631da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 29641da177e4SLinus Torvalds 29651da177e4SLinus Torvalds static inline unsigned int 29661da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 29671da177e4SLinus Torvalds struct xdr_netobj *ownername) 29681da177e4SLinus Torvalds { 29691da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 29701da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 29711da177e4SLinus Torvalds & LOCK_HASH_MASK; 29721da177e4SLinus Torvalds } 29731da177e4SLinus Torvalds 29741da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 29751da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 29761da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 29771da177e4SLinus Torvalds 2978fd39ca9aSNeilBrown static struct nfs4_stateid * 29791da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 29801da177e4SLinus Torvalds { 29819346eff0SKrishna Kumar struct nfs4_stateid *local; 29821da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 29831da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 29841da177e4SLinus Torvalds unsigned int hashval; 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 29879346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 29881da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 29891da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 29901da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 29911da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 29921da177e4SLinus Torvalds return local; 29931da177e4SLinus Torvalds } 29941da177e4SLinus Torvalds } 29959346eff0SKrishna Kumar 29969346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 29971da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 29981da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 29991da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 30001da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 30011da177e4SLinus Torvalds return local; 30021da177e4SLinus Torvalds } 3003849823c5SNeil Brown } 30041da177e4SLinus Torvalds return NULL; 30051da177e4SLinus Torvalds } 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds static struct nfs4_delegation * 30081da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 30091da177e4SLinus Torvalds { 301013cd2184SNeilBrown struct nfs4_file *fp; 301113cd2184SNeilBrown struct nfs4_delegation *dl; 30121da177e4SLinus Torvalds 30131da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 30141da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 30151da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 30161da177e4SLinus Torvalds 30171da177e4SLinus Torvalds fp = find_file(ino); 301813cd2184SNeilBrown if (!fp) 30191da177e4SLinus Torvalds return NULL; 302013cd2184SNeilBrown dl = find_delegation_file(fp, stid); 302113cd2184SNeilBrown put_nfs4_file(fp); 302213cd2184SNeilBrown return dl; 30231da177e4SLinus Torvalds } 30241da177e4SLinus Torvalds 30251da177e4SLinus Torvalds /* 30261da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 30271da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 30281da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 30291da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 30301da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 30311da177e4SLinus Torvalds * the VFS, but this is a very deep change! 30321da177e4SLinus Torvalds */ 30331da177e4SLinus Torvalds static inline void 30341da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 30351da177e4SLinus Torvalds { 30361da177e4SLinus Torvalds if (lock->fl_start < 0) 30371da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 30381da177e4SLinus Torvalds if (lock->fl_end < 0) 30391da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 30401da177e4SLinus Torvalds } 30411da177e4SLinus Torvalds 3042d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3043d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 3044e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 3045d5b9026aSNeilBrown }; 30461da177e4SLinus Torvalds 30471da177e4SLinus Torvalds static inline void 30481da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 30491da177e4SLinus Torvalds { 3050d5b9026aSNeilBrown struct nfs4_stateowner *sop; 3051d5b9026aSNeilBrown unsigned int hval; 30521da177e4SLinus Torvalds 3053d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3054d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 3055d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 30561da177e4SLinus Torvalds kref_get(&sop->so_ref); 30571da177e4SLinus Torvalds deny->ld_sop = sop; 30581da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3059d5b9026aSNeilBrown } else { 3060d5b9026aSNeilBrown deny->ld_sop = NULL; 3061d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3062d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 30631da177e4SLinus Torvalds } 30641da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 306587df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 306687df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 30671da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 30681da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 30691da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 30701da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 30711da177e4SLinus Torvalds } 30721da177e4SLinus Torvalds 30731da177e4SLinus Torvalds static struct nfs4_stateowner * 30741da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 30751da177e4SLinus Torvalds struct xdr_netobj *owner) 30761da177e4SLinus Torvalds { 30771da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 30781da177e4SLinus Torvalds struct nfs4_stateowner *op; 30791da177e4SLinus Torvalds 30801da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3081599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 30821da177e4SLinus Torvalds return op; 30831da177e4SLinus Torvalds } 30841da177e4SLinus Torvalds return NULL; 30851da177e4SLinus Torvalds } 30861da177e4SLinus Torvalds 30871da177e4SLinus Torvalds /* 30881da177e4SLinus Torvalds * Alloc a lock owner structure. 30891da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 30901da177e4SLinus Torvalds * occured. 30911da177e4SLinus Torvalds * 30921da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 30931da177e4SLinus Torvalds */ 30941da177e4SLinus Torvalds 30951da177e4SLinus Torvalds static struct nfs4_stateowner * 30961da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 30971da177e4SLinus Torvalds struct nfs4_stateowner *sop; 30981da177e4SLinus Torvalds struct nfs4_replay *rp; 30991da177e4SLinus Torvalds unsigned int idhashval; 31001da177e4SLinus Torvalds 31011da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 31021da177e4SLinus Torvalds return NULL; 31031da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 31041da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 31051da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 31061da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3107ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3108ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 31091da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 31101da177e4SLinus Torvalds sop->so_time = 0; 31111da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 31121da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3113ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 31141da177e4SLinus Torvalds sop->so_is_open_owner = 0; 31151da177e4SLinus Torvalds sop->so_id = current_ownerid++; 31161da177e4SLinus Torvalds sop->so_client = clp; 3117b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3118b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3119b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 31201da177e4SLinus Torvalds sop->so_confirmed = 1; 31211da177e4SLinus Torvalds rp = &sop->so_replay; 3122de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 31231da177e4SLinus Torvalds rp->rp_buflen = 0; 31241da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 31251da177e4SLinus Torvalds return sop; 31261da177e4SLinus Torvalds } 31271da177e4SLinus Torvalds 3128fd39ca9aSNeilBrown static struct nfs4_stateid * 31291da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 31301da177e4SLinus Torvalds { 31311da177e4SLinus Torvalds struct nfs4_stateid *stp; 31321da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 31331da177e4SLinus Torvalds 31345ac049acSNeilBrown stp = nfs4_alloc_stateid(); 31355ac049acSNeilBrown if (stp == NULL) 31361da177e4SLinus Torvalds goto out; 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 31381da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3139ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3140ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 31411da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 31428beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3143ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 31441da177e4SLinus Torvalds stp->st_stateowner = sop; 314513cd2184SNeilBrown get_nfs4_file(fp); 31461da177e4SLinus Torvalds stp->st_file = fp; 31471da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 31481da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 31491da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 31501da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 31511da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 31521da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 31531da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 31544c4cd222SNeilBrown stp->st_openstp = open_stp; 31551da177e4SLinus Torvalds 31561da177e4SLinus Torvalds out: 31571da177e4SLinus Torvalds return stp; 31581da177e4SLinus Torvalds } 31591da177e4SLinus Torvalds 3160fd39ca9aSNeilBrown static int 31611da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 31621da177e4SLinus Torvalds { 316387df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 31641da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 31651da177e4SLinus Torvalds } 31661da177e4SLinus Torvalds 31671da177e4SLinus Torvalds /* 31681da177e4SLinus Torvalds * LOCK operation 31691da177e4SLinus Torvalds */ 3170b37ad28bSAl Viro __be32 3171ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3172a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 31731da177e4SLinus Torvalds { 31743e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3175b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 31761da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 31771da177e4SLinus Torvalds struct file *filp; 31781da177e4SLinus Torvalds struct file_lock file_lock; 31798dc7c311SAndy Adamson struct file_lock conflock; 3180b37ad28bSAl Viro __be32 status = 0; 31811da177e4SLinus Torvalds unsigned int strhashval; 3182150b3934SMarc Eshel unsigned int cmd; 3183b8dd7b9aSAl Viro int err; 31841da177e4SLinus Torvalds 31851da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 31861da177e4SLinus Torvalds (long long) lock->lk_offset, 31871da177e4SLinus Torvalds (long long) lock->lk_length); 31881da177e4SLinus Torvalds 31891da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 31901da177e4SLinus Torvalds return nfserr_inval; 31911da177e4SLinus Torvalds 3192ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 31938837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3194a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3195a6f6ef2fSAndy Adamson return status; 3196a6f6ef2fSAndy Adamson } 3197a6f6ef2fSAndy Adamson 31981da177e4SLinus Torvalds nfs4_lock_state(); 31991da177e4SLinus Torvalds 32001da177e4SLinus Torvalds if (lock->lk_is_new) { 32011da177e4SLinus Torvalds /* 32021da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3203893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3204893f8770SNeilBrown * lock stateid. 32051da177e4SLinus Torvalds */ 32061da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 32071da177e4SLinus Torvalds struct nfs4_file *fp; 32081da177e4SLinus Torvalds 32091da177e4SLinus Torvalds status = nfserr_stale_clientid; 3210849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 32111da177e4SLinus Torvalds goto out; 32121da177e4SLinus Torvalds 32131da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3214ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 32151da177e4SLinus Torvalds lock->lk_new_open_seqid, 32161da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3217f3362737SJ. Bruce Fields OPEN_STATE, 32183a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3219b59e3c0eSNeil Brown lock); 322037515177SNeilBrown if (status) 32211da177e4SLinus Torvalds goto out; 32223a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 32231da177e4SLinus Torvalds /* create lockowner and lock stateid */ 32241da177e4SLinus Torvalds fp = open_stp->st_file; 32251da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 32261da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 32271da177e4SLinus Torvalds &lock->v.new.owner); 32283e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 32293e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 32303e9e3dbeSNeilBrown * create new stateids)? */ 32311da177e4SLinus Torvalds status = nfserr_resource; 3232b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3233b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3234b59e3c0eSNeil Brown if (lock_sop == NULL) 32351da177e4SLinus Torvalds goto out; 3236b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 32378a280510SJ. Bruce Fields if (lock_stp == NULL) 32381da177e4SLinus Torvalds goto out; 32391da177e4SLinus Torvalds } else { 32401da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3241ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 32421da177e4SLinus Torvalds lock->lk_old_lock_seqid, 32431da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3244f3362737SJ. Bruce Fields LOCK_STATE, 32453a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 32461da177e4SLinus Torvalds if (status) 32471da177e4SLinus Torvalds goto out; 32483a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 32491da177e4SLinus Torvalds } 32503a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 32511da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 32521da177e4SLinus Torvalds 32530dd395dcSNeilBrown status = nfserr_grace; 3254af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 32550dd395dcSNeilBrown goto out; 32560dd395dcSNeilBrown status = nfserr_no_grace; 3257af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 32580dd395dcSNeilBrown goto out; 32590dd395dcSNeilBrown 32601da177e4SLinus Torvalds locks_init_lock(&file_lock); 32611da177e4SLinus Torvalds switch (lock->lk_type) { 32621da177e4SLinus Torvalds case NFS4_READ_LT: 32631da177e4SLinus Torvalds case NFS4_READW_LT: 32641da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3265150b3934SMarc Eshel cmd = F_SETLK; 32661da177e4SLinus Torvalds break; 32671da177e4SLinus Torvalds case NFS4_WRITE_LT: 32681da177e4SLinus Torvalds case NFS4_WRITEW_LT: 32691da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3270150b3934SMarc Eshel cmd = F_SETLK; 32711da177e4SLinus Torvalds break; 32721da177e4SLinus Torvalds default: 32731da177e4SLinus Torvalds status = nfserr_inval; 32741da177e4SLinus Torvalds goto out; 32751da177e4SLinus Torvalds } 3276b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 32771da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 32781da177e4SLinus Torvalds file_lock.fl_file = filp; 32791da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3280d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 32811da177e4SLinus Torvalds 32821da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 328387df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 32841da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 32851da177e4SLinus Torvalds 32861da177e4SLinus Torvalds /* 32871da177e4SLinus Torvalds * Try to lock the file in the VFS. 32881da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 32891da177e4SLinus Torvalds */ 32901da177e4SLinus Torvalds 3291fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3292b8dd7b9aSAl Viro switch (-err) { 32931da177e4SLinus Torvalds case 0: /* success! */ 32941da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 32951da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 32961da177e4SLinus Torvalds sizeof(stateid_t)); 3297b8dd7b9aSAl Viro status = 0; 3298eb76b3fdSAndy Adamson break; 3299eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3300eb76b3fdSAndy Adamson status = nfserr_denied; 3301eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3302eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3303eb76b3fdSAndy Adamson break; 33041da177e4SLinus Torvalds case (EDEADLK): 33051da177e4SLinus Torvalds status = nfserr_deadlock; 3306eb76b3fdSAndy Adamson break; 33071da177e4SLinus Torvalds default: 3308fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3309eb76b3fdSAndy Adamson status = nfserr_resource; 3310eb76b3fdSAndy Adamson break; 33111da177e4SLinus Torvalds } 33121da177e4SLinus Torvalds out: 33138a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3314f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 33153a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 33163a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3317a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3318f2327d9aSNeil Brown } 33191da177e4SLinus Torvalds nfs4_unlock_state(); 33201da177e4SLinus Torvalds return status; 33211da177e4SLinus Torvalds } 33221da177e4SLinus Torvalds 33231da177e4SLinus Torvalds /* 332455ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 332555ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 332655ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 332755ef1274SJ. Bruce Fields * inode operation.) 332855ef1274SJ. Bruce Fields */ 332955ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 333055ef1274SJ. Bruce Fields { 333155ef1274SJ. Bruce Fields struct file *file; 333255ef1274SJ. Bruce Fields int err; 333355ef1274SJ. Bruce Fields 333455ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 333555ef1274SJ. Bruce Fields if (err) 333655ef1274SJ. Bruce Fields return err; 333755ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 333855ef1274SJ. Bruce Fields nfsd_close(file); 333955ef1274SJ. Bruce Fields return err; 334055ef1274SJ. Bruce Fields } 334155ef1274SJ. Bruce Fields 334255ef1274SJ. Bruce Fields /* 33431da177e4SLinus Torvalds * LOCKT operation 33441da177e4SLinus Torvalds */ 3345b37ad28bSAl Viro __be32 3346ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3347ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 33481da177e4SLinus Torvalds { 33491da177e4SLinus Torvalds struct inode *inode; 33501da177e4SLinus Torvalds struct file_lock file_lock; 3351fd85b817SMarc Eshel int error; 3352b37ad28bSAl Viro __be32 status; 33531da177e4SLinus Torvalds 3354af558e33SJ. Bruce Fields if (locks_in_grace()) 33551da177e4SLinus Torvalds return nfserr_grace; 33561da177e4SLinus Torvalds 33571da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 33581da177e4SLinus Torvalds return nfserr_inval; 33591da177e4SLinus Torvalds 33601da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 33611da177e4SLinus Torvalds nfs4_lock_state(); 33621da177e4SLinus Torvalds 33631da177e4SLinus Torvalds status = nfserr_stale_clientid; 3364849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 33651da177e4SLinus Torvalds goto out; 33661da177e4SLinus Torvalds 3367ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3368849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 33691da177e4SLinus Torvalds if (status == nfserr_symlink) 33701da177e4SLinus Torvalds status = nfserr_inval; 33711da177e4SLinus Torvalds goto out; 33721da177e4SLinus Torvalds } 33731da177e4SLinus Torvalds 3374ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 33751da177e4SLinus Torvalds locks_init_lock(&file_lock); 33761da177e4SLinus Torvalds switch (lockt->lt_type) { 33771da177e4SLinus Torvalds case NFS4_READ_LT: 33781da177e4SLinus Torvalds case NFS4_READW_LT: 33791da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 33801da177e4SLinus Torvalds break; 33811da177e4SLinus Torvalds case NFS4_WRITE_LT: 33821da177e4SLinus Torvalds case NFS4_WRITEW_LT: 33831da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 33841da177e4SLinus Torvalds break; 33851da177e4SLinus Torvalds default: 33862fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 33871da177e4SLinus Torvalds status = nfserr_inval; 33881da177e4SLinus Torvalds goto out; 33891da177e4SLinus Torvalds } 33901da177e4SLinus Torvalds 33911da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 33921da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 33931da177e4SLinus Torvalds if (lockt->lt_stateowner) 33941da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 33951da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 33961da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 33971da177e4SLinus Torvalds 33981da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 339987df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 34001da177e4SLinus Torvalds 34011da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 34021da177e4SLinus Torvalds 34031da177e4SLinus Torvalds status = nfs_ok; 340455ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3405fd85b817SMarc Eshel if (error) { 3406fd85b817SMarc Eshel status = nfserrno(error); 3407fd85b817SMarc Eshel goto out; 3408fd85b817SMarc Eshel } 34099d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 34101da177e4SLinus Torvalds status = nfserr_denied; 34119d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 34121da177e4SLinus Torvalds } 34131da177e4SLinus Torvalds out: 34141da177e4SLinus Torvalds nfs4_unlock_state(); 34151da177e4SLinus Torvalds return status; 34161da177e4SLinus Torvalds } 34171da177e4SLinus Torvalds 3418b37ad28bSAl Viro __be32 3419ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3420a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 34211da177e4SLinus Torvalds { 34221da177e4SLinus Torvalds struct nfs4_stateid *stp; 34231da177e4SLinus Torvalds struct file *filp = NULL; 34241da177e4SLinus Torvalds struct file_lock file_lock; 3425b37ad28bSAl Viro __be32 status; 3426b8dd7b9aSAl Viro int err; 34271da177e4SLinus Torvalds 34281da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 34291da177e4SLinus Torvalds (long long) locku->lu_offset, 34301da177e4SLinus Torvalds (long long) locku->lu_length); 34311da177e4SLinus Torvalds 34321da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 34331da177e4SLinus Torvalds return nfserr_inval; 34341da177e4SLinus Torvalds 34351da177e4SLinus Torvalds nfs4_lock_state(); 34361da177e4SLinus Torvalds 3437ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 34381da177e4SLinus Torvalds locku->lu_seqid, 34391da177e4SLinus Torvalds &locku->lu_stateid, 3440f3362737SJ. Bruce Fields LOCK_STATE, 34411da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 34421da177e4SLinus Torvalds goto out; 34431da177e4SLinus Torvalds 34441da177e4SLinus Torvalds filp = stp->st_vfs_file; 34451da177e4SLinus Torvalds BUG_ON(!filp); 34461da177e4SLinus Torvalds locks_init_lock(&file_lock); 34471da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 34481da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 34491da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 34501da177e4SLinus Torvalds file_lock.fl_file = filp; 34511da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3452d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 34531da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 34541da177e4SLinus Torvalds 345587df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 34561da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 34571da177e4SLinus Torvalds 34581da177e4SLinus Torvalds /* 34591da177e4SLinus Torvalds * Try to unlock the file in the VFS. 34601da177e4SLinus Torvalds */ 3461fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3462b8dd7b9aSAl Viro if (err) { 3463fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 34641da177e4SLinus Torvalds goto out_nfserr; 34651da177e4SLinus Torvalds } 34661da177e4SLinus Torvalds /* 34671da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 34681da177e4SLinus Torvalds */ 34691da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 34701da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 34711da177e4SLinus Torvalds 34721da177e4SLinus Torvalds out: 3473f2327d9aSNeil Brown if (locku->lu_stateowner) { 34741da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3475a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3476f2327d9aSNeil Brown } 34771da177e4SLinus Torvalds nfs4_unlock_state(); 34781da177e4SLinus Torvalds return status; 34791da177e4SLinus Torvalds 34801da177e4SLinus Torvalds out_nfserr: 3481b8dd7b9aSAl Viro status = nfserrno(err); 34821da177e4SLinus Torvalds goto out; 34831da177e4SLinus Torvalds } 34841da177e4SLinus Torvalds 34851da177e4SLinus Torvalds /* 34861da177e4SLinus Torvalds * returns 34871da177e4SLinus Torvalds * 1: locks held by lockowner 34881da177e4SLinus Torvalds * 0: no locks held by lockowner 34891da177e4SLinus Torvalds */ 34901da177e4SLinus Torvalds static int 34911da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 34921da177e4SLinus Torvalds { 34931da177e4SLinus Torvalds struct file_lock **flpp; 34947eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 34951da177e4SLinus Torvalds int status = 0; 34961da177e4SLinus Torvalds 34971da177e4SLinus Torvalds lock_kernel(); 34981da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3499796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 35001da177e4SLinus Torvalds status = 1; 35011da177e4SLinus Torvalds goto out; 35021da177e4SLinus Torvalds } 3503796dadfdSJ. Bruce Fields } 35041da177e4SLinus Torvalds out: 35051da177e4SLinus Torvalds unlock_kernel(); 35061da177e4SLinus Torvalds return status; 35071da177e4SLinus Torvalds } 35081da177e4SLinus Torvalds 3509b37ad28bSAl Viro __be32 3510b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3511b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3512b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 35131da177e4SLinus Torvalds { 35141da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 35153e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 35163e9e3dbeSNeilBrown struct nfs4_stateid *stp; 35171da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 35183e9e3dbeSNeilBrown struct list_head matches; 35193e9e3dbeSNeilBrown int i; 3520b37ad28bSAl Viro __be32 status; 35211da177e4SLinus Torvalds 35221da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 35231da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 35241da177e4SLinus Torvalds 35251da177e4SLinus Torvalds /* XXX check for lease expiration */ 35261da177e4SLinus Torvalds 35271da177e4SLinus Torvalds status = nfserr_stale_clientid; 3528849823c5SNeil Brown if (STALE_CLIENTID(clid)) 35291da177e4SLinus Torvalds return status; 35301da177e4SLinus Torvalds 35311da177e4SLinus Torvalds nfs4_lock_state(); 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds status = nfserr_locks_held; 35343e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 35353e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 35363e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 35373e9e3dbeSNeilBrown * data structures. */ 35383e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 35393e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 35403e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3541599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 35423e9e3dbeSNeilBrown continue; 35433e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3544ea1da636SNeilBrown st_perstateowner) { 35453e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 35461da177e4SLinus Torvalds goto out; 35473e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 35483e9e3dbeSNeilBrown * so it's OK to fool with here. */ 35493e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 35501da177e4SLinus Torvalds } 35513e9e3dbeSNeilBrown } 35523e9e3dbeSNeilBrown } 35533e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 35543e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 35553e9e3dbeSNeilBrown * have been checked. */ 35561da177e4SLinus Torvalds status = nfs_ok; 35570fa822e4SNeilBrown while (!list_empty(&matches)) { 35580fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 35590fa822e4SNeilBrown so_perclient); 35600fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 35610fa822e4SNeilBrown * for openowners. */ 35620fa822e4SNeilBrown list_del(&sop->so_perclient); 3563f044ff83SJ. Bruce Fields release_lockowner(sop); 35641da177e4SLinus Torvalds } 35651da177e4SLinus Torvalds out: 35661da177e4SLinus Torvalds nfs4_unlock_state(); 35671da177e4SLinus Torvalds return status; 35681da177e4SLinus Torvalds } 35691da177e4SLinus Torvalds 35701da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3571a55370a3SNeilBrown alloc_reclaim(void) 35721da177e4SLinus Torvalds { 3573a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 35741da177e4SLinus Torvalds } 35751da177e4SLinus Torvalds 3576c7b9a459SNeilBrown int 3577a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 3578c7b9a459SNeilBrown { 3579c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3580c7b9a459SNeilBrown struct nfs4_client *clp; 3581c7b9a459SNeilBrown 3582a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 3583c7b9a459SNeilBrown return clp ? 1 : 0; 3584c7b9a459SNeilBrown } 3585c7b9a459SNeilBrown 35861da177e4SLinus Torvalds /* 35871da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 35881da177e4SLinus Torvalds */ 3589190e4fbfSNeilBrown int 3590190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 35911da177e4SLinus Torvalds { 35921da177e4SLinus Torvalds unsigned int strhashval; 35931da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 35941da177e4SLinus Torvalds 3595a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3596a55370a3SNeilBrown crp = alloc_reclaim(); 35971da177e4SLinus Torvalds if (!crp) 35981da177e4SLinus Torvalds return 0; 3599a55370a3SNeilBrown strhashval = clientstr_hashval(name); 36001da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 36011da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3602a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 36031da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 36041da177e4SLinus Torvalds return 1; 36051da177e4SLinus Torvalds } 36061da177e4SLinus Torvalds 36071da177e4SLinus Torvalds static void 36081da177e4SLinus Torvalds nfs4_release_reclaim(void) 36091da177e4SLinus Torvalds { 36101da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 36111da177e4SLinus Torvalds int i; 36121da177e4SLinus Torvalds 36131da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 36141da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 36151da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 36161da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 36171da177e4SLinus Torvalds list_del(&crp->cr_strhash); 36181da177e4SLinus Torvalds kfree(crp); 36191da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 36201da177e4SLinus Torvalds } 36211da177e4SLinus Torvalds } 36221da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 36231da177e4SLinus Torvalds } 36241da177e4SLinus Torvalds 36251da177e4SLinus Torvalds /* 36261da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3627fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 36281da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 36291da177e4SLinus Torvalds { 36301da177e4SLinus Torvalds unsigned int strhashval; 36311da177e4SLinus Torvalds struct nfs4_client *clp; 36321da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 36331da177e4SLinus Torvalds 36341da177e4SLinus Torvalds 36351da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 36361da177e4SLinus Torvalds clp = find_confirmed_client(clid); 36371da177e4SLinus Torvalds if (clp == NULL) 36381da177e4SLinus Torvalds return NULL; 36391da177e4SLinus Torvalds 3640a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3641a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3642a55370a3SNeilBrown clp->cl_recdir); 36431da177e4SLinus Torvalds 36441da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3645a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 36461da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3647a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 36481da177e4SLinus Torvalds return crp; 36491da177e4SLinus Torvalds } 36501da177e4SLinus Torvalds } 36511da177e4SLinus Torvalds return NULL; 36521da177e4SLinus Torvalds } 36531da177e4SLinus Torvalds 36541da177e4SLinus Torvalds /* 36551da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 36561da177e4SLinus Torvalds */ 3657b37ad28bSAl Viro __be32 36581da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 36591da177e4SLinus Torvalds { 3660dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 36611da177e4SLinus Torvalds } 36621da177e4SLinus Torvalds 3663ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 36641da177e4SLinus Torvalds 3665e8ff2a84SJ. Bruce Fields int 3666ac4d8ff2SNeilBrown nfs4_state_init(void) 36671da177e4SLinus Torvalds { 3668e8ff2a84SJ. Bruce Fields int i, status; 36691da177e4SLinus Torvalds 3670e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3671e8ff2a84SJ. Bruce Fields if (status) 3672e8ff2a84SJ. Bruce Fields return status; 36731da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 36741da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 36751da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 36761da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 36771da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 36781da177e4SLinus Torvalds } 36795282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 36805282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 36811da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 36821da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 36831da177e4SLinus Torvalds } 36841da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 36851da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 36861da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 36871da177e4SLinus Torvalds } 36881da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 36891da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 36901da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 36911da177e4SLinus Torvalds } 36921da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 36931da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 36941da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 36951da177e4SLinus Torvalds } 36961da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 36971da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 36981da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 36991da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3700ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3701ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3702ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3703e8ff2a84SJ. Bruce Fields return 0; 3704ac4d8ff2SNeilBrown } 3705ac4d8ff2SNeilBrown 3706190e4fbfSNeilBrown static void 3707190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3708190e4fbfSNeilBrown { 3709190e4fbfSNeilBrown int status; 3710190e4fbfSNeilBrown 37110964a3d3SNeilBrown nfs4_lock_state(); 37120964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3713190e4fbfSNeilBrown status = nfsd4_recdir_load(); 37140964a3d3SNeilBrown nfs4_unlock_state(); 3715190e4fbfSNeilBrown if (status) 3716190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3717190e4fbfSNeilBrown } 3718190e4fbfSNeilBrown 37199a8db97eSMarc Eshel unsigned long 37209a8db97eSMarc Eshel get_nfs4_grace_period(void) 37219a8db97eSMarc Eshel { 37229a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 37239a8db97eSMarc Eshel } 37249a8db97eSMarc Eshel 3725c2f1a551SMeelap Shah /* 3726c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3727c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3728c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3729c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3730c2f1a551SMeelap Shah * 3731c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3732c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3733c2f1a551SMeelap Shah */ 3734c2f1a551SMeelap Shah static void 3735c2f1a551SMeelap Shah set_max_delegations(void) 3736c2f1a551SMeelap Shah { 3737c2f1a551SMeelap Shah /* 3738c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3739c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3740c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3741c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3742c2f1a551SMeelap Shah */ 3743c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3744c2f1a551SMeelap Shah } 3745c2f1a551SMeelap Shah 3746ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3747ac4d8ff2SNeilBrown 3748ac4d8ff2SNeilBrown static void 3749ac4d8ff2SNeilBrown __nfs4_state_start(void) 3750ac4d8ff2SNeilBrown { 37519a8db97eSMarc Eshel unsigned long grace_time; 3752ac4d8ff2SNeilBrown 37531da177e4SLinus Torvalds boot_time = get_seconds(); 3754af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3755d99a05adSNeilBrown lease_time = user_lease_time; 3756af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 37579a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 37589a8db97eSMarc Eshel grace_time/HZ); 375958da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 37609a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3761c2f1a551SMeelap Shah set_max_delegations(); 37621da177e4SLinus Torvalds } 37631da177e4SLinus Torvalds 3764e8ff2a84SJ. Bruce Fields void 376576a3550eSNeilBrown nfs4_state_start(void) 37661da177e4SLinus Torvalds { 37671da177e4SLinus Torvalds if (nfs4_init) 3768e8ff2a84SJ. Bruce Fields return; 3769190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 377076a3550eSNeilBrown __nfs4_state_start(); 37711da177e4SLinus Torvalds nfs4_init = 1; 3772e8ff2a84SJ. Bruce Fields return; 37731da177e4SLinus Torvalds } 37741da177e4SLinus Torvalds 37751da177e4SLinus Torvalds time_t 37761da177e4SLinus Torvalds nfs4_lease_time(void) 37771da177e4SLinus Torvalds { 37781da177e4SLinus Torvalds return lease_time; 37791da177e4SLinus Torvalds } 37801da177e4SLinus Torvalds 37811da177e4SLinus Torvalds static void 37821da177e4SLinus Torvalds __nfs4_state_shutdown(void) 37831da177e4SLinus Torvalds { 37841da177e4SLinus Torvalds int i; 37851da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 37861da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 37871da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 37881da177e4SLinus Torvalds 37891da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 37901da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 37911da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 37921da177e4SLinus Torvalds expire_client(clp); 37931da177e4SLinus Torvalds } 37941da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 37951da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 37961da177e4SLinus Torvalds expire_client(clp); 37971da177e4SLinus Torvalds } 37981da177e4SLinus Torvalds } 37991da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 38001da177e4SLinus Torvalds spin_lock(&recall_lock); 38011da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 38021da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 38031da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 38041da177e4SLinus Torvalds } 38051da177e4SLinus Torvalds spin_unlock(&recall_lock); 38061da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 38071da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 38081da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 38091da177e4SLinus Torvalds unhash_delegation(dp); 38101da177e4SLinus Torvalds } 38111da177e4SLinus Torvalds 3812190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 38131da177e4SLinus Torvalds nfs4_init = 0; 38141da177e4SLinus Torvalds } 38151da177e4SLinus Torvalds 38161da177e4SLinus Torvalds void 38171da177e4SLinus Torvalds nfs4_state_shutdown(void) 38181da177e4SLinus Torvalds { 38195e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 38205e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 38212c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 38221da177e4SLinus Torvalds nfs4_lock_state(); 38231da177e4SLinus Torvalds nfs4_release_reclaim(); 38241da177e4SLinus Torvalds __nfs4_state_shutdown(); 38251da177e4SLinus Torvalds nfs4_unlock_state(); 38261da177e4SLinus Torvalds } 38271da177e4SLinus Torvalds 38283dd98a3bSJeff Layton /* 38293dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 38303dd98a3bSJeff Layton * accessed when nfsd is starting. 38313dd98a3bSJeff Layton */ 38320964a3d3SNeilBrown static void 38330964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 38340964a3d3SNeilBrown { 38350964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 38360964a3d3SNeilBrown } 38370964a3d3SNeilBrown 38380964a3d3SNeilBrown /* 38390964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 38400964a3d3SNeilBrown */ 38410964a3d3SNeilBrown int 38420964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 38430964a3d3SNeilBrown { 38440964a3d3SNeilBrown int status; 3845a63bb996SAl Viro struct path path; 38460964a3d3SNeilBrown 3847a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 38480964a3d3SNeilBrown if (status) 38490964a3d3SNeilBrown return status; 38500964a3d3SNeilBrown status = -ENOTDIR; 3851a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 38520964a3d3SNeilBrown nfs4_set_recdir(recdir); 38530964a3d3SNeilBrown status = 0; 38540964a3d3SNeilBrown } 3855a63bb996SAl Viro path_put(&path); 38560964a3d3SNeilBrown return status; 38570964a3d3SNeilBrown } 38580964a3d3SNeilBrown 38593dd98a3bSJeff Layton char * 38603dd98a3bSJeff Layton nfs4_recoverydir(void) 38613dd98a3bSJeff Layton { 38623dd98a3bSJeff Layton return user_recovery_dirname; 38633dd98a3bSJeff Layton } 38643dd98a3bSJeff Layton 38651da177e4SLinus Torvalds /* 38661da177e4SLinus Torvalds * Called when leasetime is changed. 38671da177e4SLinus Torvalds * 3868d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3869d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3870d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3871d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3872d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 38733dd98a3bSJeff Layton * 38743dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 38753dd98a3bSJeff Layton * when nfsd is starting 38761da177e4SLinus Torvalds */ 38771da177e4SLinus Torvalds void 38781da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 38791da177e4SLinus Torvalds { 3880d99a05adSNeilBrown user_lease_time = leasetime; 38811da177e4SLinus Torvalds } 3882