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 */ 71ec6b5d7bSAndy Adamson static u64 current_sessionid = 1; 72fd39ca9aSNeilBrown 73fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 74fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 751da177e4SLinus Torvalds 761da177e4SLinus Torvalds /* forward declarations */ 77fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 781da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 790964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 800964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 811da177e4SLinus Torvalds 828b671b80SJ. Bruce Fields /* Locking: */ 838b671b80SJ. Bruce Fields 848b671b80SJ. Bruce Fields /* Currently used for almost all code touching nfsv4 state: */ 85353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 861da177e4SLinus Torvalds 878b671b80SJ. Bruce Fields /* 888b671b80SJ. Bruce Fields * Currently used for the del_recall_lru and file hash table. In an 898b671b80SJ. Bruce Fields * effort to decrease the scope of the client_mutex, this spinlock may 908b671b80SJ. Bruce Fields * eventually cover more: 918b671b80SJ. Bruce Fields */ 928b671b80SJ. Bruce Fields static DEFINE_SPINLOCK(recall_lock); 938b671b80SJ. Bruce Fields 94e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 95e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 96e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 97e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 98e60d4398SNeilBrown 991da177e4SLinus Torvalds void 1001da177e4SLinus Torvalds nfs4_lock_state(void) 1011da177e4SLinus Torvalds { 102353ab6e9SIngo Molnar mutex_lock(&client_mutex); 1031da177e4SLinus Torvalds } 1041da177e4SLinus Torvalds 1051da177e4SLinus Torvalds void 1061da177e4SLinus Torvalds nfs4_unlock_state(void) 1071da177e4SLinus Torvalds { 108353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1091da177e4SLinus Torvalds } 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds static inline u32 1121da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1131da177e4SLinus Torvalds { 1141da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds u32 x = 0; 1171da177e4SLinus Torvalds while (nbytes--) { 1181da177e4SLinus Torvalds x *= 37; 1191da177e4SLinus Torvalds x += *cptr++; 1201da177e4SLinus Torvalds } 1211da177e4SLinus Torvalds return x; 1221da177e4SLinus Torvalds } 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds static struct list_head del_recall_lru; 1251da177e4SLinus Torvalds 12613cd2184SNeilBrown static inline void 12713cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 12813cd2184SNeilBrown { 1298b671b80SJ. Bruce Fields if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { 1308b671b80SJ. Bruce Fields list_del(&fi->fi_hash); 1318b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 1328b671b80SJ. Bruce Fields iput(fi->fi_inode); 1338b671b80SJ. Bruce Fields kmem_cache_free(file_slab, fi); 1348b671b80SJ. Bruce Fields } 13513cd2184SNeilBrown } 13613cd2184SNeilBrown 13713cd2184SNeilBrown static inline void 13813cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 13913cd2184SNeilBrown { 1408b671b80SJ. Bruce Fields atomic_inc(&fi->fi_ref); 14113cd2184SNeilBrown } 14213cd2184SNeilBrown 143ef0f3390SNeilBrown static int num_delegations; 144c2f1a551SMeelap Shah unsigned int max_delegations; 145ef0f3390SNeilBrown 146ef0f3390SNeilBrown /* 147ef0f3390SNeilBrown * Open owner state (share locks) 148ef0f3390SNeilBrown */ 149ef0f3390SNeilBrown 150ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 151ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 152ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 153ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 154ef0f3390SNeilBrown 155ef0f3390SNeilBrown #define ownerid_hashval(id) \ 156ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 157ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 158ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 159ef0f3390SNeilBrown 160ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 161ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 162ef0f3390SNeilBrown 163ef0f3390SNeilBrown /* hash table for nfs4_file */ 164ef0f3390SNeilBrown #define FILE_HASH_BITS 8 165ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 166ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 167ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 168ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 169ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 170ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 171ef0f3390SNeilBrown 172ef0f3390SNeilBrown #define file_hashval(x) \ 173ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 174ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 175ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 176ef0f3390SNeilBrown 177ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 178ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 179ef0f3390SNeilBrown 1801da177e4SLinus Torvalds static struct nfs4_delegation * 1811da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1821da177e4SLinus Torvalds { 1831da177e4SLinus Torvalds struct nfs4_delegation *dp; 1841da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1851da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 18847f9940cSMeelap Shah if (fp->fi_had_conflict) 18947f9940cSMeelap Shah return NULL; 190c2f1a551SMeelap Shah if (num_delegations > max_delegations) 191ef0f3390SNeilBrown return NULL; 1925b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1935b2d21c1SNeilBrown if (dp == NULL) 1941da177e4SLinus Torvalds return dp; 195ef0f3390SNeilBrown num_delegations++; 196ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 197ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1981da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1991da177e4SLinus Torvalds dp->dl_client = clp; 20013cd2184SNeilBrown get_nfs4_file(fp); 2011da177e4SLinus Torvalds dp->dl_file = fp; 2021da177e4SLinus Torvalds dp->dl_flock = NULL; 2031da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2041da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2051da177e4SLinus Torvalds dp->dl_type = type; 2061da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2071da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2081da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 20978155ed7SBian Naimeng dp->dl_stateid.si_boot = get_seconds(); 2101da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2111da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2121da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2136c02eaa1SJ. Bruce Fields fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); 2141da177e4SLinus Torvalds dp->dl_time = 0; 2151da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 216ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 217ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2181da177e4SLinus Torvalds return dp; 2191da177e4SLinus Torvalds } 2201da177e4SLinus Torvalds 2211da177e4SLinus Torvalds void 2221da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2231da177e4SLinus Torvalds { 2241da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2251da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 22613cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2275b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 228ef0f3390SNeilBrown num_delegations--; 2291da177e4SLinus Torvalds } 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2331da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2341da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2351da177e4SLinus Torvalds * fl_release_callback. 2361da177e4SLinus Torvalds */ 2371da177e4SLinus Torvalds static void 2381da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2391da177e4SLinus Torvalds { 2401da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2411da177e4SLinus Torvalds 2421da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2431da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2441da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2451da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 246c907132dSNeilBrown if (dp->dl_flock) 247a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2481da177e4SLinus Torvalds nfsd_close(filp); 2491da177e4SLinus Torvalds } 2501da177e4SLinus Torvalds 2511da177e4SLinus Torvalds /* Called under the state lock. */ 2521da177e4SLinus Torvalds static void 2531da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2541da177e4SLinus Torvalds { 255ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 256ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2571da177e4SLinus Torvalds spin_lock(&recall_lock); 2581da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2591da177e4SLinus Torvalds spin_unlock(&recall_lock); 2601da177e4SLinus Torvalds nfs4_close_delegation(dp); 2611da177e4SLinus Torvalds nfs4_put_delegation(dp); 2621da177e4SLinus Torvalds } 2631da177e4SLinus Torvalds 2641da177e4SLinus Torvalds /* 2651da177e4SLinus Torvalds * SETCLIENTID state 2661da177e4SLinus Torvalds */ 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2691da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2701da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2711da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2721da177e4SLinus Torvalds 2731da177e4SLinus Torvalds #define clientid_hashval(id) \ 2741da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 275a55370a3SNeilBrown #define clientstr_hashval(name) \ 276a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2771da177e4SLinus Torvalds /* 2781da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2791da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2801da177e4SLinus Torvalds * 2811da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2821da177e4SLinus Torvalds * setclientid_confirmed info. 2831da177e4SLinus Torvalds * 2841da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2851da177e4SLinus Torvalds * setclientid info. 2861da177e4SLinus Torvalds * 2871da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2881da177e4SLinus Torvalds * for lease renewal. 2891da177e4SLinus Torvalds * 2901da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2911da177e4SLinus Torvalds * for last close replay. 2921da177e4SLinus Torvalds */ 2931da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2941da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2951da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2961da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2971da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2981da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2991da177e4SLinus Torvalds static struct list_head client_lru; 3001da177e4SLinus Torvalds static struct list_head close_lru; 3011da177e4SLinus Torvalds 3022283963fSJ. Bruce Fields static void unhash_generic_stateid(struct nfs4_stateid *stp) 3032283963fSJ. Bruce Fields { 3042283963fSJ. Bruce Fields list_del(&stp->st_hash); 3052283963fSJ. Bruce Fields list_del(&stp->st_perfile); 3062283963fSJ. Bruce Fields list_del(&stp->st_perstateowner); 3072283963fSJ. Bruce Fields } 3082283963fSJ. Bruce Fields 3092283963fSJ. Bruce Fields static void free_generic_stateid(struct nfs4_stateid *stp) 3102283963fSJ. Bruce Fields { 3112283963fSJ. Bruce Fields put_nfs4_file(stp->st_file); 3122283963fSJ. Bruce Fields kmem_cache_free(stateid_slab, stp); 3132283963fSJ. Bruce Fields } 3142283963fSJ. Bruce Fields 3152283963fSJ. Bruce Fields static void release_lock_stateid(struct nfs4_stateid *stp) 3162283963fSJ. Bruce Fields { 3172283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3182283963fSJ. Bruce Fields locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); 3192283963fSJ. Bruce Fields free_generic_stateid(stp); 3202283963fSJ. Bruce Fields } 3212283963fSJ. Bruce Fields 322f044ff83SJ. Bruce Fields static void unhash_lockowner(struct nfs4_stateowner *sop) 323f044ff83SJ. Bruce Fields { 324f044ff83SJ. Bruce Fields struct nfs4_stateid *stp; 325f044ff83SJ. Bruce Fields 326f044ff83SJ. Bruce Fields list_del(&sop->so_idhash); 327f044ff83SJ. Bruce Fields list_del(&sop->so_strhash); 328f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); 329f044ff83SJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 330f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 331f044ff83SJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 332f044ff83SJ. Bruce Fields release_lock_stateid(stp); 333f044ff83SJ. Bruce Fields } 334f044ff83SJ. Bruce Fields } 335f044ff83SJ. Bruce Fields 336f044ff83SJ. Bruce Fields static void release_lockowner(struct nfs4_stateowner *sop) 337f044ff83SJ. Bruce Fields { 338f044ff83SJ. Bruce Fields unhash_lockowner(sop); 339f044ff83SJ. Bruce Fields nfs4_put_stateowner(sop); 340f044ff83SJ. Bruce Fields } 341f044ff83SJ. Bruce Fields 342f1d110caSJ. Bruce Fields static void 343f1d110caSJ. Bruce Fields release_stateid_lockowners(struct nfs4_stateid *open_stp) 344f1d110caSJ. Bruce Fields { 345f1d110caSJ. Bruce Fields struct nfs4_stateowner *lock_sop; 346f1d110caSJ. Bruce Fields 347f1d110caSJ. Bruce Fields while (!list_empty(&open_stp->st_lockowners)) { 348f1d110caSJ. Bruce Fields lock_sop = list_entry(open_stp->st_lockowners.next, 349f1d110caSJ. Bruce Fields struct nfs4_stateowner, so_perstateid); 350f1d110caSJ. Bruce Fields /* list_del(&open_stp->st_lockowners); */ 351f1d110caSJ. Bruce Fields BUG_ON(lock_sop->so_is_open_owner); 352f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 353f1d110caSJ. Bruce Fields } 354f1d110caSJ. Bruce Fields } 355f1d110caSJ. Bruce Fields 3562283963fSJ. Bruce Fields static void release_open_stateid(struct nfs4_stateid *stp) 3572283963fSJ. Bruce Fields { 3582283963fSJ. Bruce Fields unhash_generic_stateid(stp); 3592283963fSJ. Bruce Fields release_stateid_lockowners(stp); 3602283963fSJ. Bruce Fields nfsd_close(stp->st_vfs_file); 3612283963fSJ. Bruce Fields free_generic_stateid(stp); 3622283963fSJ. Bruce Fields } 3632283963fSJ. Bruce Fields 364f044ff83SJ. Bruce Fields static void unhash_openowner(struct nfs4_stateowner *sop) 365f1d110caSJ. Bruce Fields { 366f1d110caSJ. Bruce Fields struct nfs4_stateid *stp; 367f1d110caSJ. Bruce Fields 368f1d110caSJ. Bruce Fields list_del(&sop->so_idhash); 369f1d110caSJ. Bruce Fields list_del(&sop->so_strhash); 370f1d110caSJ. Bruce Fields list_del(&sop->so_perclient); 371f044ff83SJ. Bruce Fields list_del(&sop->so_perstateid); /* XXX: necessary? */ 372f1d110caSJ. Bruce Fields while (!list_empty(&sop->so_stateids)) { 373f044ff83SJ. Bruce Fields stp = list_first_entry(&sop->so_stateids, 374f1d110caSJ. Bruce Fields struct nfs4_stateid, st_perstateowner); 375f1d110caSJ. Bruce Fields release_open_stateid(stp); 376f1d110caSJ. Bruce Fields } 377f1d110caSJ. Bruce Fields } 378f1d110caSJ. Bruce Fields 379f044ff83SJ. Bruce Fields static void release_openowner(struct nfs4_stateowner *sop) 380f1d110caSJ. Bruce Fields { 381f044ff83SJ. Bruce Fields unhash_openowner(sop); 382f1d110caSJ. Bruce Fields list_del(&sop->so_close_lru); 383f1d110caSJ. Bruce Fields nfs4_put_stateowner(sop); 384f1d110caSJ. Bruce Fields } 385f1d110caSJ. Bruce Fields 3865282fd72SMarc Eshel static DEFINE_SPINLOCK(sessionid_lock); 3875282fd72SMarc Eshel #define SESSION_HASH_SIZE 512 3885282fd72SMarc Eshel static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; 3895282fd72SMarc Eshel 3905282fd72SMarc Eshel static inline int 3915282fd72SMarc Eshel hash_sessionid(struct nfs4_sessionid *sessionid) 3925282fd72SMarc Eshel { 3935282fd72SMarc Eshel struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; 3945282fd72SMarc Eshel 3955282fd72SMarc Eshel return sid->sequence % SESSION_HASH_SIZE; 3965282fd72SMarc Eshel } 3975282fd72SMarc Eshel 3985282fd72SMarc Eshel static inline void 3995282fd72SMarc Eshel dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) 4005282fd72SMarc Eshel { 4015282fd72SMarc Eshel u32 *ptr = (u32 *)(&sessionid->data[0]); 4025282fd72SMarc Eshel dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); 4035282fd72SMarc Eshel } 4045282fd72SMarc Eshel 405ec6b5d7bSAndy Adamson static void 406ec6b5d7bSAndy Adamson gen_sessionid(struct nfsd4_session *ses) 407ec6b5d7bSAndy Adamson { 408ec6b5d7bSAndy Adamson struct nfs4_client *clp = ses->se_client; 409ec6b5d7bSAndy Adamson struct nfsd4_sessionid *sid; 410ec6b5d7bSAndy Adamson 411ec6b5d7bSAndy Adamson sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; 412ec6b5d7bSAndy Adamson sid->clientid = clp->cl_clientid; 413ec6b5d7bSAndy Adamson sid->sequence = current_sessionid++; 414ec6b5d7bSAndy Adamson sid->reserved = 0; 415ec6b5d7bSAndy Adamson } 416ec6b5d7bSAndy Adamson 417ec6b5d7bSAndy Adamson /* 418ec6b5d7bSAndy Adamson * Give the client the number of slots it requests bound by 419ec6b5d7bSAndy Adamson * NFSD_MAX_SLOTS_PER_SESSION and by sv_drc_max_pages. 420ec6b5d7bSAndy Adamson * 421ec6b5d7bSAndy Adamson * If we run out of pages (sv_drc_pages_used == sv_drc_max_pages) we 422ec6b5d7bSAndy Adamson * should (up to a point) re-negotiate active sessions and reduce their 423ec6b5d7bSAndy Adamson * slot usage to make rooom for new connections. For now we just fail the 424ec6b5d7bSAndy Adamson * create session. 425ec6b5d7bSAndy Adamson */ 426ec6b5d7bSAndy Adamson static int set_forechannel_maxreqs(struct nfsd4_channel_attrs *fchan) 427ec6b5d7bSAndy Adamson { 428ec6b5d7bSAndy Adamson int status = 0, np = fchan->maxreqs * NFSD_PAGES_PER_SLOT; 429ec6b5d7bSAndy Adamson 430ec6b5d7bSAndy Adamson spin_lock(&nfsd_serv->sv_lock); 431ec6b5d7bSAndy Adamson if (np + nfsd_serv->sv_drc_pages_used > nfsd_serv->sv_drc_max_pages) 432ec6b5d7bSAndy Adamson np = nfsd_serv->sv_drc_max_pages - nfsd_serv->sv_drc_pages_used; 433ec6b5d7bSAndy Adamson nfsd_serv->sv_drc_pages_used += np; 434ec6b5d7bSAndy Adamson spin_unlock(&nfsd_serv->sv_lock); 435ec6b5d7bSAndy Adamson 436ec6b5d7bSAndy Adamson if (np <= 0) { 437ec6b5d7bSAndy Adamson status = nfserr_resource; 438ec6b5d7bSAndy Adamson fchan->maxreqs = 0; 439ec6b5d7bSAndy Adamson } else 440ec6b5d7bSAndy Adamson fchan->maxreqs = np / NFSD_PAGES_PER_SLOT; 441ec6b5d7bSAndy Adamson 442ec6b5d7bSAndy Adamson return status; 443ec6b5d7bSAndy Adamson } 444ec6b5d7bSAndy Adamson 445ec6b5d7bSAndy Adamson /* 446ec6b5d7bSAndy Adamson * fchan holds the client values on input, and the server values on output 447ec6b5d7bSAndy Adamson */ 448ec6b5d7bSAndy Adamson static int init_forechannel_attrs(struct svc_rqst *rqstp, 449ec6b5d7bSAndy Adamson struct nfsd4_session *session, 450ec6b5d7bSAndy Adamson struct nfsd4_channel_attrs *fchan) 451ec6b5d7bSAndy Adamson { 452ec6b5d7bSAndy Adamson int status = 0; 453ec6b5d7bSAndy Adamson __u32 maxcount = svc_max_payload(rqstp); 454ec6b5d7bSAndy Adamson 455ec6b5d7bSAndy Adamson /* headerpadsz set to zero in encode routine */ 456ec6b5d7bSAndy Adamson 457ec6b5d7bSAndy Adamson /* Use the client's max request and max response size if possible */ 458ec6b5d7bSAndy Adamson if (fchan->maxreq_sz > maxcount) 459ec6b5d7bSAndy Adamson fchan->maxreq_sz = maxcount; 460ec6b5d7bSAndy Adamson session->se_fmaxreq_sz = fchan->maxreq_sz; 461ec6b5d7bSAndy Adamson 462ec6b5d7bSAndy Adamson if (fchan->maxresp_sz > maxcount) 463ec6b5d7bSAndy Adamson fchan->maxresp_sz = maxcount; 464ec6b5d7bSAndy Adamson session->se_fmaxresp_sz = fchan->maxresp_sz; 465ec6b5d7bSAndy Adamson 466ec6b5d7bSAndy Adamson /* Set the max response cached size our default which is 467ec6b5d7bSAndy Adamson * a multiple of PAGE_SIZE and small */ 468ec6b5d7bSAndy Adamson session->se_fmaxresp_cached = NFSD_PAGES_PER_SLOT * PAGE_SIZE; 469ec6b5d7bSAndy Adamson fchan->maxresp_cached = session->se_fmaxresp_cached; 470ec6b5d7bSAndy Adamson 471ec6b5d7bSAndy Adamson /* Use the client's maxops if possible */ 472ec6b5d7bSAndy Adamson if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) 473ec6b5d7bSAndy Adamson fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; 474ec6b5d7bSAndy Adamson session->se_fmaxops = fchan->maxops; 475ec6b5d7bSAndy Adamson 476ec6b5d7bSAndy Adamson /* try to use the client requested number of slots */ 477ec6b5d7bSAndy Adamson if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) 478ec6b5d7bSAndy Adamson fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; 479ec6b5d7bSAndy Adamson 480ec6b5d7bSAndy Adamson /* FIXME: Error means no more DRC pages so the server should 481ec6b5d7bSAndy Adamson * recover pages from existing sessions. For now fail session 482ec6b5d7bSAndy Adamson * creation. 483ec6b5d7bSAndy Adamson */ 484ec6b5d7bSAndy Adamson status = set_forechannel_maxreqs(fchan); 485ec6b5d7bSAndy Adamson 486ec6b5d7bSAndy Adamson session->se_fnumslots = fchan->maxreqs; 487ec6b5d7bSAndy Adamson return status; 488ec6b5d7bSAndy Adamson } 489ec6b5d7bSAndy Adamson 490ec6b5d7bSAndy Adamson static int 491ec6b5d7bSAndy Adamson alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, 492ec6b5d7bSAndy Adamson struct nfsd4_create_session *cses) 493ec6b5d7bSAndy Adamson { 494ec6b5d7bSAndy Adamson struct nfsd4_session *new, tmp; 495ec6b5d7bSAndy Adamson int idx, status = nfserr_resource, slotsize; 496ec6b5d7bSAndy Adamson 497ec6b5d7bSAndy Adamson memset(&tmp, 0, sizeof(tmp)); 498ec6b5d7bSAndy Adamson 499ec6b5d7bSAndy Adamson /* FIXME: For now, we just accept the client back channel attributes. */ 500ec6b5d7bSAndy Adamson status = init_forechannel_attrs(rqstp, &tmp, &cses->fore_channel); 501ec6b5d7bSAndy Adamson if (status) 502ec6b5d7bSAndy Adamson goto out; 503ec6b5d7bSAndy Adamson 504ec6b5d7bSAndy Adamson /* allocate struct nfsd4_session and slot table in one piece */ 505ec6b5d7bSAndy Adamson slotsize = tmp.se_fnumslots * sizeof(struct nfsd4_slot); 506ec6b5d7bSAndy Adamson new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); 507ec6b5d7bSAndy Adamson if (!new) 508ec6b5d7bSAndy Adamson goto out; 509ec6b5d7bSAndy Adamson 510ec6b5d7bSAndy Adamson memcpy(new, &tmp, sizeof(*new)); 511ec6b5d7bSAndy Adamson 512ec6b5d7bSAndy Adamson new->se_client = clp; 513ec6b5d7bSAndy Adamson gen_sessionid(new); 514ec6b5d7bSAndy Adamson idx = hash_sessionid(&new->se_sessionid); 515ec6b5d7bSAndy Adamson memcpy(clp->cl_sessionid.data, new->se_sessionid.data, 516ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 517ec6b5d7bSAndy Adamson 518ec6b5d7bSAndy Adamson new->se_flags = cses->flags; 519ec6b5d7bSAndy Adamson kref_init(&new->se_ref); 520ec6b5d7bSAndy Adamson spin_lock(&sessionid_lock); 521ec6b5d7bSAndy Adamson list_add(&new->se_hash, &sessionid_hashtbl[idx]); 522ec6b5d7bSAndy Adamson list_add(&new->se_perclnt, &clp->cl_sessions); 523ec6b5d7bSAndy Adamson spin_unlock(&sessionid_lock); 524ec6b5d7bSAndy Adamson 525ec6b5d7bSAndy Adamson status = nfs_ok; 526ec6b5d7bSAndy Adamson out: 527ec6b5d7bSAndy Adamson return status; 528ec6b5d7bSAndy Adamson } 529ec6b5d7bSAndy Adamson 5305282fd72SMarc Eshel /* caller must hold sessionid_lock */ 5315282fd72SMarc Eshel static struct nfsd4_session * 5325282fd72SMarc Eshel find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) 5335282fd72SMarc Eshel { 5345282fd72SMarc Eshel struct nfsd4_session *elem; 5355282fd72SMarc Eshel int idx; 5365282fd72SMarc Eshel 5375282fd72SMarc Eshel dump_sessionid(__func__, sessionid); 5385282fd72SMarc Eshel idx = hash_sessionid(sessionid); 5395282fd72SMarc Eshel dprintk("%s: idx is %d\n", __func__, idx); 5405282fd72SMarc Eshel /* Search in the appropriate list */ 5415282fd72SMarc Eshel list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { 5425282fd72SMarc Eshel dump_sessionid("list traversal", &elem->se_sessionid); 5435282fd72SMarc Eshel if (!memcmp(elem->se_sessionid.data, sessionid->data, 5445282fd72SMarc Eshel NFS4_MAX_SESSIONID_LEN)) { 5455282fd72SMarc Eshel return elem; 5465282fd72SMarc Eshel } 5475282fd72SMarc Eshel } 5485282fd72SMarc Eshel 5495282fd72SMarc Eshel dprintk("%s: session not found\n", __func__); 5505282fd72SMarc Eshel return NULL; 5515282fd72SMarc Eshel } 5525282fd72SMarc Eshel 5535282fd72SMarc Eshel /* caller must hold sessionid_lock */ 5547116ed6bSAndy Adamson static void 5555282fd72SMarc Eshel unhash_session(struct nfsd4_session *ses) 5567116ed6bSAndy Adamson { 5577116ed6bSAndy Adamson list_del(&ses->se_hash); 5587116ed6bSAndy Adamson list_del(&ses->se_perclnt); 5595282fd72SMarc Eshel } 5605282fd72SMarc Eshel 5615282fd72SMarc Eshel static void 5625282fd72SMarc Eshel release_session(struct nfsd4_session *ses) 5635282fd72SMarc Eshel { 5645282fd72SMarc Eshel spin_lock(&sessionid_lock); 5655282fd72SMarc Eshel unhash_session(ses); 5665282fd72SMarc Eshel spin_unlock(&sessionid_lock); 5677116ed6bSAndy Adamson nfsd4_put_session(ses); 5687116ed6bSAndy Adamson } 5697116ed6bSAndy Adamson 57014778a13SAndy Adamson static void nfsd4_release_respages(struct page **respages, short resused); 57114778a13SAndy Adamson 5727116ed6bSAndy Adamson void 5737116ed6bSAndy Adamson free_session(struct kref *kref) 5747116ed6bSAndy Adamson { 5757116ed6bSAndy Adamson struct nfsd4_session *ses; 57614778a13SAndy Adamson int i; 5777116ed6bSAndy Adamson 5787116ed6bSAndy Adamson ses = container_of(kref, struct nfsd4_session, se_ref); 57914778a13SAndy Adamson for (i = 0; i < ses->se_fnumslots; i++) { 58014778a13SAndy Adamson struct nfsd4_cache_entry *e = &ses->se_slots[i].sl_cache_entry; 58114778a13SAndy Adamson nfsd4_release_respages(e->ce_respages, e->ce_resused); 58214778a13SAndy Adamson } 5837116ed6bSAndy Adamson kfree(ses->se_slots); 5847116ed6bSAndy Adamson kfree(ses); 5857116ed6bSAndy Adamson } 5867116ed6bSAndy Adamson 5871da177e4SLinus Torvalds static inline void 5881da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 5891da177e4SLinus Torvalds { 5901da177e4SLinus Torvalds /* 5911da177e4SLinus Torvalds * Move client to the end to the LRU list. 5921da177e4SLinus Torvalds */ 5931da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 5941da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 5951da177e4SLinus Torvalds clp->cl_clientid.cl_id); 5961da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 5971da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds 6001da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 6011da177e4SLinus Torvalds static int 6021da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 6031da177e4SLinus Torvalds { 6041da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 6051da177e4SLinus Torvalds return 0; 60660adfc50SAndy Adamson dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", 60760adfc50SAndy Adamson clid->cl_boot, clid->cl_id, boot_time); 6081da177e4SLinus Torvalds return 1; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 6111da177e4SLinus Torvalds /* 6121da177e4SLinus Torvalds * XXX Should we use a slab cache ? 6131da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 6141da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 6151da177e4SLinus Torvalds */ 61635bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 6171da177e4SLinus Torvalds { 6181da177e4SLinus Torvalds struct nfs4_client *clp; 6191da177e4SLinus Torvalds 62035bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 62135bba9a3SJ. Bruce Fields if (clp == NULL) 62235bba9a3SJ. Bruce Fields return NULL; 62335bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 62435bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 62535bba9a3SJ. Bruce Fields kfree(clp); 62635bba9a3SJ. Bruce Fields return NULL; 62735bba9a3SJ. Bruce Fields } 6281da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 6291da177e4SLinus Torvalds clp->cl_name.len = name.len; 6301da177e4SLinus Torvalds return clp; 6311da177e4SLinus Torvalds } 6321da177e4SLinus Torvalds 6331b1a9b31SJ. Bruce Fields static void 6341b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 6351b1a9b31SJ. Bruce Fields { 6361b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 6371b1a9b31SJ. Bruce Fields 6381b1a9b31SJ. Bruce Fields if (clnt) { 639404ec117SJ. Bruce Fields /* 640404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 641404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 642404ec117SJ. Bruce Fields */ 6431b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 6441b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 6451b1a9b31SJ. Bruce Fields } 6461b1a9b31SJ. Bruce Fields } 6471b1a9b31SJ. Bruce Fields 6481da177e4SLinus Torvalds static inline void 6491da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 6501da177e4SLinus Torvalds { 6511b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 65238eb76a5SAndy Adamson nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, 65338eb76a5SAndy Adamson clp->cl_slot.sl_cache_entry.ce_resused); 6541da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 6551da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 65668e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 6571da177e4SLinus Torvalds kfree(clp->cl_name.data); 6581da177e4SLinus Torvalds kfree(clp); 6591da177e4SLinus Torvalds } 6601da177e4SLinus Torvalds 6611da177e4SLinus Torvalds void 6621da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 6631da177e4SLinus Torvalds { 6641da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 6651da177e4SLinus Torvalds free_client(clp); 6661da177e4SLinus Torvalds } 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds static void 6691da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 6701da177e4SLinus Torvalds { 6711da177e4SLinus Torvalds struct nfs4_stateowner *sop; 6721da177e4SLinus Torvalds struct nfs4_delegation *dp; 6731da177e4SLinus Torvalds struct list_head reaplist; 6741da177e4SLinus Torvalds 6751da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 6761da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 6791da177e4SLinus Torvalds spin_lock(&recall_lock); 680ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 681ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 6821da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 6831da177e4SLinus Torvalds dp->dl_flock); 684ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 6851da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds spin_unlock(&recall_lock); 6881da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 6891da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 6901da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 6911da177e4SLinus Torvalds unhash_delegation(dp); 6921da177e4SLinus Torvalds } 6931da177e4SLinus Torvalds list_del(&clp->cl_idhash); 6941da177e4SLinus Torvalds list_del(&clp->cl_strhash); 6951da177e4SLinus Torvalds list_del(&clp->cl_lru); 696ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 697ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 698f044ff83SJ. Bruce Fields release_openowner(sop); 6991da177e4SLinus Torvalds } 700c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 701c4bf7868SMarc Eshel struct nfsd4_session *ses; 702c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 703c4bf7868SMarc Eshel se_perclnt); 704c4bf7868SMarc Eshel release_session(ses); 705c4bf7868SMarc Eshel } 7061da177e4SLinus Torvalds put_nfs4_client(clp); 7071da177e4SLinus Torvalds } 7081da177e4SLinus Torvalds 70935bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 71035bba9a3SJ. Bruce Fields { 7111da177e4SLinus Torvalds struct nfs4_client *clp; 7121da177e4SLinus Torvalds 71335bba9a3SJ. Bruce Fields clp = alloc_client(name); 71435bba9a3SJ. Bruce Fields if (clp == NULL) 71535bba9a3SJ. Bruce Fields return NULL; 716a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 7171da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 7181da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 7191da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 7201da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 721ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 722ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 7239fb87070SMarc Eshel INIT_LIST_HEAD(&clp->cl_sessions); 7241da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 7251da177e4SLinus Torvalds return clp; 7261da177e4SLinus Torvalds } 7271da177e4SLinus Torvalds 72835bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 72935bba9a3SJ. Bruce Fields { 73035bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 73135bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 7321da177e4SLinus Torvalds } 7331da177e4SLinus Torvalds 73435bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 73535bba9a3SJ. Bruce Fields { 7361da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 7371da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 7381da177e4SLinus Torvalds } 7391da177e4SLinus Torvalds 74035bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 74135bba9a3SJ. Bruce Fields { 7421da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 7431da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 7441da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 7451da177e4SLinus Torvalds get_group_info(target->cr_group_info); 7461da177e4SLinus Torvalds } 7471da177e4SLinus Torvalds 74835bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 749599e0a22SJ. Bruce Fields { 750a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 7511da177e4SLinus Torvalds } 7521da177e4SLinus Torvalds 7531da177e4SLinus Torvalds static int 754599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 755599e0a22SJ. Bruce Fields { 756599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds 7591da177e4SLinus Torvalds static int 760599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 761599e0a22SJ. Bruce Fields { 762599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 7631da177e4SLinus Torvalds } 7641da177e4SLinus Torvalds 7651da177e4SLinus Torvalds /* XXX what about NGROUP */ 7661da177e4SLinus Torvalds static int 767599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 768599e0a22SJ. Bruce Fields { 769599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 7701da177e4SLinus Torvalds } 7711da177e4SLinus Torvalds 7725ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 7735ec7b46cSJ. Bruce Fields { 7745ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 7755ec7b46cSJ. Bruce Fields 7761da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 7771da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 7781da177e4SLinus Torvalds } 7791da177e4SLinus Torvalds 780deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 781deda2faaSJ. Bruce Fields { 782deda2faaSJ. Bruce Fields static u32 i; 7831da177e4SLinus Torvalds u32 *p; 7841da177e4SLinus Torvalds 7851da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 786deda2faaSJ. Bruce Fields *p++ = get_seconds(); 787deda2faaSJ. Bruce Fields *p++ = i++; 7881da177e4SLinus Torvalds } 7891da177e4SLinus Torvalds 79035bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 79135bba9a3SJ. Bruce Fields { 7921da177e4SLinus Torvalds if (name.len == 0) 7931da177e4SLinus Torvalds return 0; 7941da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 7952fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 7961da177e4SLinus Torvalds return 0; 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds return 1; 7991da177e4SLinus Torvalds } 8001da177e4SLinus Torvalds 801fd39ca9aSNeilBrown static void 8021da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 8031da177e4SLinus Torvalds { 8041da177e4SLinus Torvalds unsigned int idhashval; 8051da177e4SLinus Torvalds 8061da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 8071da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8081da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 8091da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 8101da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8111da177e4SLinus Torvalds } 8121da177e4SLinus Torvalds 813fd39ca9aSNeilBrown static void 8141da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 8151da177e4SLinus Torvalds { 8161da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8171da177e4SLinus Torvalds unsigned int strhashval; 8181da177e4SLinus Torvalds 8191da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 8201da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 821f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 822a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 8231da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 8241da177e4SLinus Torvalds renew_client(clp); 8251da177e4SLinus Torvalds } 8261da177e4SLinus Torvalds 8271da177e4SLinus Torvalds static struct nfs4_client * 8281da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 8291da177e4SLinus Torvalds { 8301da177e4SLinus Torvalds struct nfs4_client *clp; 8311da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 834599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8351da177e4SLinus Torvalds return clp; 8361da177e4SLinus Torvalds } 8371da177e4SLinus Torvalds return NULL; 8381da177e4SLinus Torvalds } 8391da177e4SLinus Torvalds 8401da177e4SLinus Torvalds static struct nfs4_client * 8411da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 8421da177e4SLinus Torvalds { 8431da177e4SLinus Torvalds struct nfs4_client *clp; 8441da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8451da177e4SLinus Torvalds 8461da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 847599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8481da177e4SLinus Torvalds return clp; 8491da177e4SLinus Torvalds } 8501da177e4SLinus Torvalds return NULL; 8511da177e4SLinus Torvalds } 8521da177e4SLinus Torvalds 853a1bcecd2SAndy Adamson /* 854a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 855a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 856a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 857a1bcecd2SAndy Adamson * 858a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 859a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 860a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 861a1bcecd2SAndy Adamson */ 862a1bcecd2SAndy Adamson static inline int 863a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 864a1bcecd2SAndy Adamson { 865a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 866a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 867a1bcecd2SAndy Adamson } 868a1bcecd2SAndy Adamson 86928ce6054SNeilBrown static struct nfs4_client * 870a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 871a1bcecd2SAndy Adamson bool use_exchange_id) 87228ce6054SNeilBrown { 87328ce6054SNeilBrown struct nfs4_client *clp; 87428ce6054SNeilBrown 87528ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 876a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 877a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 87828ce6054SNeilBrown return clp; 87928ce6054SNeilBrown } 88028ce6054SNeilBrown return NULL; 88128ce6054SNeilBrown } 88228ce6054SNeilBrown 88328ce6054SNeilBrown static struct nfs4_client * 884a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 885a1bcecd2SAndy Adamson bool use_exchange_id) 88628ce6054SNeilBrown { 88728ce6054SNeilBrown struct nfs4_client *clp; 88828ce6054SNeilBrown 88928ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 890a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 891a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 89228ce6054SNeilBrown return clp; 89328ce6054SNeilBrown } 89428ce6054SNeilBrown return NULL; 89528ce6054SNeilBrown } 89628ce6054SNeilBrown 8971da177e4SLinus Torvalds /* a helper function for parse_callback */ 8981da177e4SLinus Torvalds static int 8991da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 9001da177e4SLinus Torvalds { 9011da177e4SLinus Torvalds unsigned int len = *lenp; 9021da177e4SLinus Torvalds char *p = *addrp; 9031da177e4SLinus Torvalds int n = -1; 9041da177e4SLinus Torvalds char c; 9051da177e4SLinus Torvalds 9061da177e4SLinus Torvalds for (;;) { 9071da177e4SLinus Torvalds if (!len) 9081da177e4SLinus Torvalds break; 9091da177e4SLinus Torvalds len--; 9101da177e4SLinus Torvalds c = *p++; 9111da177e4SLinus Torvalds if (c == '.') 9121da177e4SLinus Torvalds break; 9131da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 9141da177e4SLinus Torvalds n = -1; 9151da177e4SLinus Torvalds break; 9161da177e4SLinus Torvalds } 9171da177e4SLinus Torvalds if (n < 0) 9181da177e4SLinus Torvalds n = 0; 9191da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 9201da177e4SLinus Torvalds if (n > 255) { 9211da177e4SLinus Torvalds n = -1; 9221da177e4SLinus Torvalds break; 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds } 9251da177e4SLinus Torvalds *lenp = len; 9261da177e4SLinus Torvalds *addrp = p; 9271da177e4SLinus Torvalds return n; 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds 9301da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 931fd39ca9aSNeilBrown static int 9321da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 9331da177e4SLinus Torvalds { 9341da177e4SLinus Torvalds int temp = 0; 9351da177e4SLinus Torvalds u32 cbaddr = 0; 9361da177e4SLinus Torvalds u16 cbport = 0; 9371da177e4SLinus Torvalds u32 addrlen = addr_len; 9381da177e4SLinus Torvalds char *addr = addr_val; 9391da177e4SLinus Torvalds int i, shift; 9401da177e4SLinus Torvalds 9411da177e4SLinus Torvalds /* ipaddress */ 9421da177e4SLinus Torvalds shift = 24; 9431da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 9441da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 9451da177e4SLinus Torvalds return 0; 9461da177e4SLinus Torvalds } 9471da177e4SLinus Torvalds cbaddr |= (temp << shift); 9481da177e4SLinus Torvalds if (shift > 0) 9491da177e4SLinus Torvalds shift -= 8; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds *cbaddrp = cbaddr; 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds /* port */ 9541da177e4SLinus Torvalds shift = 8; 9551da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 9561da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 9571da177e4SLinus Torvalds return 0; 9581da177e4SLinus Torvalds } 9591da177e4SLinus Torvalds cbport |= (temp << shift); 9601da177e4SLinus Torvalds if (shift > 0) 9611da177e4SLinus Torvalds shift -= 8; 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds *cbportp = cbport; 9641da177e4SLinus Torvalds return 1; 9651da177e4SLinus Torvalds } 9661da177e4SLinus Torvalds 967fd39ca9aSNeilBrown static void 9681da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 9691da177e4SLinus Torvalds { 9701da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 9731da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 9741da177e4SLinus Torvalds goto out_err; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 9771da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 9781da177e4SLinus Torvalds goto out_err; 9791da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 9801da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 9811da177e4SLinus Torvalds return; 9821da177e4SLinus Torvalds out_err: 983849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 9841da177e4SLinus Torvalds "will not receive delegations\n", 9851da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 9861da177e4SLinus Torvalds 9871da177e4SLinus Torvalds return; 9881da177e4SLinus Torvalds } 9891da177e4SLinus Torvalds 990074fe897SAndy Adamson void 991074fe897SAndy Adamson nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) 992074fe897SAndy Adamson { 993074fe897SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 994074fe897SAndy Adamson 995074fe897SAndy Adamson resp->cstate.statp = statp; 996074fe897SAndy Adamson } 997074fe897SAndy Adamson 998074fe897SAndy Adamson /* 999074fe897SAndy Adamson * Dereference the result pages. 1000074fe897SAndy Adamson */ 1001074fe897SAndy Adamson static void 1002074fe897SAndy Adamson nfsd4_release_respages(struct page **respages, short resused) 1003074fe897SAndy Adamson { 1004074fe897SAndy Adamson int i; 1005074fe897SAndy Adamson 1006074fe897SAndy Adamson dprintk("--> %s\n", __func__); 1007074fe897SAndy Adamson for (i = 0; i < resused; i++) { 1008074fe897SAndy Adamson if (!respages[i]) 1009074fe897SAndy Adamson continue; 1010074fe897SAndy Adamson put_page(respages[i]); 1011074fe897SAndy Adamson respages[i] = NULL; 1012074fe897SAndy Adamson } 1013074fe897SAndy Adamson } 1014074fe897SAndy Adamson 1015074fe897SAndy Adamson static void 1016074fe897SAndy Adamson nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) 1017074fe897SAndy Adamson { 1018074fe897SAndy Adamson int i; 1019074fe897SAndy Adamson 1020074fe897SAndy Adamson for (i = 0; i < count; i++) { 1021074fe897SAndy Adamson topages[i] = frompages[i]; 1022074fe897SAndy Adamson if (!topages[i]) 1023074fe897SAndy Adamson continue; 1024074fe897SAndy Adamson get_page(topages[i]); 1025074fe897SAndy Adamson } 1026074fe897SAndy Adamson } 1027074fe897SAndy Adamson 1028074fe897SAndy Adamson /* 1029074fe897SAndy Adamson * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous 1030074fe897SAndy Adamson * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total 1031074fe897SAndy Adamson * length of the XDR response is less than se_fmaxresp_cached 1032074fe897SAndy Adamson * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a 1033074fe897SAndy Adamson * of the reply (e.g. readdir). 1034074fe897SAndy Adamson * 1035074fe897SAndy Adamson * Store the base and length of the rq_req.head[0] page 1036074fe897SAndy Adamson * of the NFSv4.1 data, just past the rpc header. 1037074fe897SAndy Adamson */ 1038074fe897SAndy Adamson void 1039074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1040074fe897SAndy Adamson { 1041074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 1042074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 1043074fe897SAndy Adamson struct nfsd4_compoundargs *args = rqstp->rq_argp; 1044074fe897SAndy Adamson struct nfsd4_op *op = &args->ops[resp->opcnt]; 1045074fe897SAndy Adamson struct kvec *resv = &rqstp->rq_res.head[0]; 1046074fe897SAndy Adamson 1047074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 1048074fe897SAndy Adamson 1049074fe897SAndy Adamson /* Don't cache a failed OP_SEQUENCE. */ 1050074fe897SAndy Adamson if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) 1051074fe897SAndy Adamson return; 1052bf864a31SAndy Adamson 1053074fe897SAndy Adamson nfsd4_release_respages(entry->ce_respages, entry->ce_resused); 1054bf864a31SAndy Adamson entry->ce_opcnt = resp->opcnt; 1055bf864a31SAndy Adamson entry->ce_status = resp->cstate.status; 1056bf864a31SAndy Adamson 1057bf864a31SAndy Adamson /* 1058bf864a31SAndy Adamson * Don't need a page to cache just the sequence operation - the slot 1059bf864a31SAndy Adamson * does this for us! 1060bf864a31SAndy Adamson */ 1061bf864a31SAndy Adamson 1062bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1063bf864a31SAndy Adamson entry->ce_resused = 0; 1064bf864a31SAndy Adamson entry->ce_rpchdrlen = 0; 1065bf864a31SAndy Adamson dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, 1066bf864a31SAndy Adamson resp->cstate.slot->sl_cache_entry.ce_cachethis); 1067bf864a31SAndy Adamson return; 1068bf864a31SAndy Adamson } 1069074fe897SAndy Adamson entry->ce_resused = rqstp->rq_resused; 1070074fe897SAndy Adamson if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) 1071074fe897SAndy Adamson entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; 1072074fe897SAndy Adamson nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, 1073074fe897SAndy Adamson entry->ce_resused); 1074074fe897SAndy Adamson entry->ce_datav.iov_base = resp->cstate.statp; 1075074fe897SAndy Adamson entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - 1076074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0])); 1077074fe897SAndy Adamson /* Current request rpc header length*/ 1078074fe897SAndy Adamson entry->ce_rpchdrlen = (char *)resp->cstate.statp - 1079074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 1080074fe897SAndy Adamson } 1081074fe897SAndy Adamson 1082074fe897SAndy Adamson /* 1083074fe897SAndy Adamson * We keep the rpc header, but take the nfs reply from the replycache. 1084074fe897SAndy Adamson */ 1085074fe897SAndy Adamson static int 1086074fe897SAndy Adamson nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, 1087074fe897SAndy Adamson struct nfsd4_cache_entry *entry) 1088074fe897SAndy Adamson { 1089074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 1090074fe897SAndy Adamson struct kvec *resv = &resp->rqstp->rq_res.head[0]; 1091074fe897SAndy Adamson int len; 1092074fe897SAndy Adamson 1093074fe897SAndy Adamson /* Current request rpc header length*/ 1094074fe897SAndy Adamson len = (char *)resp->cstate.statp - 1095074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 1096074fe897SAndy Adamson if (entry->ce_datav.iov_len + len > PAGE_SIZE) { 1097074fe897SAndy Adamson dprintk("%s v41 cached reply too large (%Zd).\n", __func__, 1098074fe897SAndy Adamson entry->ce_datav.iov_len); 1099074fe897SAndy Adamson return 0; 1100074fe897SAndy Adamson } 1101074fe897SAndy Adamson /* copy the cached reply nfsd data past the current rpc header */ 1102074fe897SAndy Adamson memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, 1103074fe897SAndy Adamson entry->ce_datav.iov_len); 1104074fe897SAndy Adamson resv->iov_len = len + entry->ce_datav.iov_len; 1105074fe897SAndy Adamson return 1; 1106074fe897SAndy Adamson } 1107074fe897SAndy Adamson 1108074fe897SAndy Adamson /* 1109074fe897SAndy Adamson * Keep the first page of the replay. Copy the NFSv4.1 data from the first 1110074fe897SAndy Adamson * cached page. Replace any futher replay pages from the cache. 1111074fe897SAndy Adamson */ 1112074fe897SAndy Adamson __be32 1113bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1114bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1115074fe897SAndy Adamson { 1116074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 1117074fe897SAndy Adamson __be32 status; 1118074fe897SAndy Adamson 1119074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 1120074fe897SAndy Adamson 1121bf864a31SAndy Adamson /* 1122bf864a31SAndy Adamson * If this is just the sequence operation, we did not keep 1123bf864a31SAndy Adamson * a page in the cache entry because we can just use the 1124bf864a31SAndy Adamson * slot info stored in struct nfsd4_sequence that was checked 1125bf864a31SAndy Adamson * against the slot in nfsd4_sequence(). 1126bf864a31SAndy Adamson * 1127bf864a31SAndy Adamson * This occurs when seq->cachethis is FALSE, or when the client 1128bf864a31SAndy Adamson * session inactivity timer fires and a solo sequence operation 1129bf864a31SAndy Adamson * is sent (lease renewal). 1130bf864a31SAndy Adamson */ 1131bf864a31SAndy Adamson if (seq && nfsd4_not_cached(resp)) { 1132bf864a31SAndy Adamson seq->maxslots = resp->cstate.session->se_fnumslots; 1133bf864a31SAndy Adamson return nfs_ok; 1134bf864a31SAndy Adamson } 1135074fe897SAndy Adamson 1136074fe897SAndy Adamson if (!nfsd41_copy_replay_data(resp, entry)) { 1137074fe897SAndy Adamson /* 1138074fe897SAndy Adamson * Not enough room to use the replay rpc header, send the 1139074fe897SAndy Adamson * cached header. Release all the allocated result pages. 1140074fe897SAndy Adamson */ 1141074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 1142074fe897SAndy Adamson nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, 1143074fe897SAndy Adamson entry->ce_resused); 1144074fe897SAndy Adamson } else { 1145074fe897SAndy Adamson /* Release all but the first allocated result page */ 1146074fe897SAndy Adamson 1147074fe897SAndy Adamson resp->rqstp->rq_resused--; 1148074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 1149074fe897SAndy Adamson 1150074fe897SAndy Adamson nfsd4_copy_pages(&resp->rqstp->rq_respages[1], 1151074fe897SAndy Adamson &entry->ce_respages[1], 1152074fe897SAndy Adamson entry->ce_resused - 1); 1153074fe897SAndy Adamson } 1154074fe897SAndy Adamson 1155074fe897SAndy Adamson resp->rqstp->rq_resused = entry->ce_resused; 1156da3846a2SAndy Adamson resp->opcnt = entry->ce_opcnt; 1157da3846a2SAndy Adamson resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; 1158074fe897SAndy Adamson status = entry->ce_status; 1159074fe897SAndy Adamson 1160074fe897SAndy Adamson return status; 1161074fe897SAndy Adamson } 1162074fe897SAndy Adamson 11630733d213SAndy Adamson /* 11640733d213SAndy Adamson * Set the exchange_id flags returned by the server. 11650733d213SAndy Adamson */ 11660733d213SAndy Adamson static void 11670733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 11680733d213SAndy Adamson { 11690733d213SAndy Adamson /* pNFS is not supported */ 11700733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 11710733d213SAndy Adamson 11720733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 11730733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 11740733d213SAndy Adamson 11750733d213SAndy Adamson /* set the wire flags to return to client. */ 11760733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 11770733d213SAndy Adamson } 11780733d213SAndy Adamson 1179b37ad28bSAl Viro __be32 1180069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1181069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1182069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1183069b6ad4SAndy Adamson { 11840733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 11850733d213SAndy Adamson int status; 11860733d213SAndy Adamson unsigned int strhashval; 11870733d213SAndy Adamson char dname[HEXDIR_LEN]; 11880733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 11890733d213SAndy Adamson u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; 11900733d213SAndy Adamson 11910733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 11920733d213SAndy Adamson " ip_addr=%u flags %x, spa_how %d\n", 11930733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 11940733d213SAndy Adamson ip_addr, exid->flags, exid->spa_how); 11950733d213SAndy Adamson 11960733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 11970733d213SAndy Adamson return nfserr_inval; 11980733d213SAndy Adamson 11990733d213SAndy Adamson /* Currently only support SP4_NONE */ 12000733d213SAndy Adamson switch (exid->spa_how) { 12010733d213SAndy Adamson case SP4_NONE: 12020733d213SAndy Adamson break; 12030733d213SAndy Adamson case SP4_SSV: 12040733d213SAndy Adamson return nfserr_encr_alg_unsupp; 12050733d213SAndy Adamson default: 12060733d213SAndy Adamson BUG(); /* checked by xdr code */ 12070733d213SAndy Adamson case SP4_MACH_CRED: 12080733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 12090733d213SAndy Adamson } 12100733d213SAndy Adamson 12110733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 12120733d213SAndy Adamson 12130733d213SAndy Adamson if (status) 12140733d213SAndy Adamson goto error; 12150733d213SAndy Adamson 12160733d213SAndy Adamson strhashval = clientstr_hashval(dname); 12170733d213SAndy Adamson 12180733d213SAndy Adamson nfs4_lock_state(); 12190733d213SAndy Adamson status = nfs_ok; 12200733d213SAndy Adamson 1221a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 12220733d213SAndy Adamson if (conf) { 12230733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 12240733d213SAndy Adamson /* 18.35.4 case 8 */ 12250733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12260733d213SAndy Adamson status = nfserr_not_same; 12270733d213SAndy Adamson goto out; 12280733d213SAndy Adamson } 12290733d213SAndy Adamson /* Client reboot: destroy old state */ 12300733d213SAndy Adamson expire_client(conf); 12310733d213SAndy Adamson goto out_new; 12320733d213SAndy Adamson } 12330733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 12340733d213SAndy Adamson /* 18.35.4 case 9 */ 12350733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12360733d213SAndy Adamson status = nfserr_perm; 12370733d213SAndy Adamson goto out; 12380733d213SAndy Adamson } 12390733d213SAndy Adamson expire_client(conf); 12400733d213SAndy Adamson goto out_new; 12410733d213SAndy Adamson } 12420733d213SAndy Adamson if (ip_addr != conf->cl_addr && 12430733d213SAndy Adamson !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) { 12440733d213SAndy Adamson /* Client collision. 18.35.4 case 3 */ 12450733d213SAndy Adamson status = nfserr_clid_inuse; 12460733d213SAndy Adamson goto out; 12470733d213SAndy Adamson } 12480733d213SAndy Adamson /* 12490733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 12500733d213SAndy Adamson * confirmed client id (18.35.3). 12510733d213SAndy Adamson */ 12520733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 12530733d213SAndy Adamson 12540733d213SAndy Adamson /* 12550733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 12560733d213SAndy Adamson * Leave confirmed record intact and return same result. 12570733d213SAndy Adamson */ 12580733d213SAndy Adamson copy_verf(conf, &verf); 12590733d213SAndy Adamson new = conf; 12600733d213SAndy Adamson goto out_copy; 12610733d213SAndy Adamson } else { 12620733d213SAndy Adamson /* 18.35.4 case 7 */ 12630733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12640733d213SAndy Adamson status = nfserr_noent; 12650733d213SAndy Adamson goto out; 12660733d213SAndy Adamson } 12670733d213SAndy Adamson } 12680733d213SAndy Adamson 1269a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 12700733d213SAndy Adamson if (unconf) { 12710733d213SAndy Adamson /* 12720733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 12730733d213SAndy Adamson * a new unconfirmed record should be generated regardless 12740733d213SAndy Adamson * of whether any properties have changed. 12750733d213SAndy Adamson */ 12760733d213SAndy Adamson expire_client(unconf); 12770733d213SAndy Adamson } 12780733d213SAndy Adamson 12790733d213SAndy Adamson out_new: 12800733d213SAndy Adamson /* Normal case */ 12810733d213SAndy Adamson new = create_client(exid->clname, dname); 12820733d213SAndy Adamson if (new == NULL) { 12830733d213SAndy Adamson status = nfserr_resource; 12840733d213SAndy Adamson goto out; 12850733d213SAndy Adamson } 12860733d213SAndy Adamson 12870733d213SAndy Adamson copy_verf(new, &verf); 12880733d213SAndy Adamson copy_cred(&new->cl_cred, &rqstp->rq_cred); 12890733d213SAndy Adamson new->cl_addr = ip_addr; 12900733d213SAndy Adamson gen_clid(new); 12910733d213SAndy Adamson gen_confirm(new); 12920733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 12930733d213SAndy Adamson out_copy: 12940733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 12950733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 12960733d213SAndy Adamson 129738eb76a5SAndy Adamson new->cl_slot.sl_seqid = 0; 129838eb76a5SAndy Adamson exid->seqid = 1; 12990733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 13000733d213SAndy Adamson 13010733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 130238eb76a5SAndy Adamson new->cl_slot.sl_seqid, new->cl_exchange_flags); 13030733d213SAndy Adamson status = nfs_ok; 13040733d213SAndy Adamson 13050733d213SAndy Adamson out: 13060733d213SAndy Adamson nfs4_unlock_state(); 13070733d213SAndy Adamson error: 13080733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 13090733d213SAndy Adamson return status; 1310069b6ad4SAndy Adamson } 1311069b6ad4SAndy Adamson 1312b85d4c01SBenny Halevy static int 1313b85d4c01SBenny Halevy check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) 1314b85d4c01SBenny Halevy { 1315b85d4c01SBenny Halevy dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, 1316b85d4c01SBenny Halevy slot->sl_seqid); 1317b85d4c01SBenny Halevy 1318b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 1319b85d4c01SBenny Halevy if (slot->sl_inuse) { 1320b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1321b85d4c01SBenny Halevy return nfserr_jukebox; 1322b85d4c01SBenny Halevy else 1323b85d4c01SBenny Halevy return nfserr_seq_misordered; 1324b85d4c01SBenny Halevy } 1325b85d4c01SBenny Halevy /* Normal */ 1326b85d4c01SBenny Halevy if (likely(seqid == slot->sl_seqid + 1)) 1327b85d4c01SBenny Halevy return nfs_ok; 1328b85d4c01SBenny Halevy /* Replay */ 1329b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1330b85d4c01SBenny Halevy return nfserr_replay_cache; 1331b85d4c01SBenny Halevy /* Wraparound */ 1332b85d4c01SBenny Halevy if (seqid == 1 && (slot->sl_seqid + 1) == 0) 1333b85d4c01SBenny Halevy return nfs_ok; 1334b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1335b85d4c01SBenny Halevy return nfserr_seq_misordered; 1336b85d4c01SBenny Halevy } 1337b85d4c01SBenny Halevy 1338069b6ad4SAndy Adamson __be32 1339069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1340069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1341069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1342069b6ad4SAndy Adamson { 1343ec6b5d7bSAndy Adamson u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; 134438eb76a5SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1345ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 134638eb76a5SAndy Adamson struct nfsd4_slot *slot = NULL; 1347ec6b5d7bSAndy Adamson int status = 0; 1348ec6b5d7bSAndy Adamson 1349ec6b5d7bSAndy Adamson nfs4_lock_state(); 1350ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1351ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1352ec6b5d7bSAndy Adamson 1353ec6b5d7bSAndy Adamson if (conf) { 135438eb76a5SAndy Adamson slot = &conf->cl_slot; 135538eb76a5SAndy Adamson status = check_slot_seqid(cr_ses->seqid, slot); 135638eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1357ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 135838eb76a5SAndy Adamson slot->sl_seqid); 135938eb76a5SAndy Adamson cstate->slot = slot; 136038eb76a5SAndy Adamson cstate->status = status; 136138eb76a5SAndy Adamson /* Return the cached reply status */ 1362bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, NULL); 136338eb76a5SAndy Adamson goto out; 136438eb76a5SAndy Adamson } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { 1365ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1366ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1367ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 136838eb76a5SAndy Adamson slot->sl_seqid, cr_ses->seqid); 1369ec6b5d7bSAndy Adamson goto out; 1370ec6b5d7bSAndy Adamson } 137138eb76a5SAndy Adamson conf->cl_slot.sl_seqid++; 1372ec6b5d7bSAndy Adamson } else if (unconf) { 1373ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1374ec6b5d7bSAndy Adamson (ip_addr != unconf->cl_addr)) { 1375ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1376ec6b5d7bSAndy Adamson goto out; 1377ec6b5d7bSAndy Adamson } 1378ec6b5d7bSAndy Adamson 137938eb76a5SAndy Adamson slot = &unconf->cl_slot; 138038eb76a5SAndy Adamson status = check_slot_seqid(cr_ses->seqid, slot); 138138eb76a5SAndy Adamson if (status) { 138238eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1383ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1384ec6b5d7bSAndy Adamson goto out; 1385ec6b5d7bSAndy Adamson } 1386ec6b5d7bSAndy Adamson 138738eb76a5SAndy Adamson slot->sl_seqid++; /* from 0 to 1 */ 1388ec6b5d7bSAndy Adamson move_to_confirmed(unconf); 1389ec6b5d7bSAndy Adamson 1390ec6b5d7bSAndy Adamson /* 1391ec6b5d7bSAndy Adamson * We do not support RDMA or persistent sessions 1392ec6b5d7bSAndy Adamson */ 1393ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_PERSIST; 1394ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_RDMA; 1395ec6b5d7bSAndy Adamson 1396ec6b5d7bSAndy Adamson conf = unconf; 1397ec6b5d7bSAndy Adamson } else { 1398ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1399ec6b5d7bSAndy Adamson goto out; 1400ec6b5d7bSAndy Adamson } 1401ec6b5d7bSAndy Adamson 1402ec6b5d7bSAndy Adamson status = alloc_init_session(rqstp, conf, cr_ses); 1403ec6b5d7bSAndy Adamson if (status) 1404ec6b5d7bSAndy Adamson goto out; 1405ec6b5d7bSAndy Adamson 1406ec6b5d7bSAndy Adamson memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, 1407ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 140838eb76a5SAndy Adamson cr_ses->seqid = slot->sl_seqid; 1409ec6b5d7bSAndy Adamson 141038eb76a5SAndy Adamson slot->sl_inuse = true; 141138eb76a5SAndy Adamson cstate->slot = slot; 1412bf864a31SAndy Adamson /* Ensure a page is used for the cache */ 1413bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = 1; 1414ec6b5d7bSAndy Adamson out: 1415ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1416ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1417ec6b5d7bSAndy Adamson return status; 1418069b6ad4SAndy Adamson } 1419069b6ad4SAndy Adamson 1420069b6ad4SAndy Adamson __be32 1421069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1422069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1423069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1424069b6ad4SAndy Adamson { 1425e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1426e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1427e10e0cfcSBenny Halevy 1428e10e0cfcSBenny Halevy /* Notes: 1429e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1430e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1431e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1432e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1433e10e0cfcSBenny Halevy */ 1434e10e0cfcSBenny Halevy 1435e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 1436e10e0cfcSBenny Halevy spin_lock(&sessionid_lock); 1437e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1438e10e0cfcSBenny Halevy if (!ses) { 1439e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1440e10e0cfcSBenny Halevy goto out; 1441e10e0cfcSBenny Halevy } 1442e10e0cfcSBenny Halevy 1443e10e0cfcSBenny Halevy unhash_session(ses); 1444e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1445e10e0cfcSBenny Halevy 1446e10e0cfcSBenny Halevy /* wait for callbacks */ 1447e10e0cfcSBenny Halevy shutdown_callback_client(ses->se_client); 1448e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1449e10e0cfcSBenny Halevy status = nfs_ok; 1450e10e0cfcSBenny Halevy out: 1451e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1452e10e0cfcSBenny Halevy return status; 1453069b6ad4SAndy Adamson } 1454069b6ad4SAndy Adamson 1455069b6ad4SAndy Adamson __be32 1456b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1457069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1458069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1459069b6ad4SAndy Adamson { 1460f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1461b85d4c01SBenny Halevy struct nfsd4_session *session; 1462b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1463b85d4c01SBenny Halevy int status; 1464b85d4c01SBenny Halevy 1465f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1466f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1467f9bb94c4SAndy Adamson 1468b85d4c01SBenny Halevy spin_lock(&sessionid_lock); 1469b85d4c01SBenny Halevy status = nfserr_badsession; 1470b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1471b85d4c01SBenny Halevy if (!session) 1472b85d4c01SBenny Halevy goto out; 1473b85d4c01SBenny Halevy 1474b85d4c01SBenny Halevy status = nfserr_badslot; 1475b85d4c01SBenny Halevy if (seq->slotid >= session->se_fnumslots) 1476b85d4c01SBenny Halevy goto out; 1477b85d4c01SBenny Halevy 1478b85d4c01SBenny Halevy slot = &session->se_slots[seq->slotid]; 1479b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1480b85d4c01SBenny Halevy 1481b85d4c01SBenny Halevy status = check_slot_seqid(seq->seqid, slot); 1482b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1483b85d4c01SBenny Halevy cstate->slot = slot; 1484b85d4c01SBenny Halevy cstate->session = session; 1485da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1486da3846a2SAndy Adamson * for nfsd4_svc_encode_compoundres processing */ 1487bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1488da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1489b85d4c01SBenny Halevy goto replay_cache; 1490b85d4c01SBenny Halevy } 1491b85d4c01SBenny Halevy if (status) 1492b85d4c01SBenny Halevy goto out; 1493b85d4c01SBenny Halevy 1494b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1495b85d4c01SBenny Halevy slot->sl_inuse = true; 1496b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1497bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = seq->cachethis; 1498bf864a31SAndy Adamson /* Always set the cache entry cachethis for solo sequence */ 1499bf864a31SAndy Adamson if (nfsd4_is_solo_sequence(resp)) 1500bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = 1; 1501b85d4c01SBenny Halevy 1502b85d4c01SBenny Halevy cstate->slot = slot; 1503b85d4c01SBenny Halevy cstate->session = session; 1504b85d4c01SBenny Halevy 1505b85d4c01SBenny Halevy replay_cache: 1506b85d4c01SBenny Halevy /* Renew the clientid on success and on replay. 1507b85d4c01SBenny Halevy * Hold a session reference until done processing the compound: 1508b85d4c01SBenny Halevy * nfsd4_put_session called only if the cstate slot is set. 1509b85d4c01SBenny Halevy */ 1510b85d4c01SBenny Halevy renew_client(session->se_client); 1511b85d4c01SBenny Halevy nfsd4_get_session(session); 1512b85d4c01SBenny Halevy out: 1513b85d4c01SBenny Halevy spin_unlock(&sessionid_lock); 1514b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1515b85d4c01SBenny Halevy return status; 1516069b6ad4SAndy Adamson } 1517069b6ad4SAndy Adamson 1518069b6ad4SAndy Adamson __be32 1519b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1520b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 15211da177e4SLinus Torvalds { 152227459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 15231da177e4SLinus Torvalds struct xdr_netobj clname = { 15241da177e4SLinus Torvalds .len = setclid->se_namelen, 15251da177e4SLinus Torvalds .data = setclid->se_name, 15261da177e4SLinus Torvalds }; 15271da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 15281da177e4SLinus Torvalds unsigned int strhashval; 152928ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1530b37ad28bSAl Viro __be32 status; 153168e76ad0SOlga Kornievskaia char *princ; 1532a55370a3SNeilBrown char dname[HEXDIR_LEN]; 15331da177e4SLinus Torvalds 15341da177e4SLinus Torvalds if (!check_name(clname)) 153573aea4ecSNeil Brown return nfserr_inval; 15361da177e4SLinus Torvalds 1537a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1538a55370a3SNeilBrown if (status) 153973aea4ecSNeil Brown return status; 1540a55370a3SNeilBrown 15411da177e4SLinus Torvalds /* 15421da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 15431da177e4SLinus Torvalds * We get here on a DRC miss. 15441da177e4SLinus Torvalds */ 15451da177e4SLinus Torvalds 1546a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 15471da177e4SLinus Torvalds 15481da177e4SLinus Torvalds nfs4_lock_state(); 1549a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 155028ce6054SNeilBrown if (conf) { 1551a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 15521da177e4SLinus Torvalds status = nfserr_clid_inuse; 1553026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1554026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client" 1555026722c2SJ. Bruce Fields " at %pI4\n", &conf->cl_addr); 15561da177e4SLinus Torvalds goto out; 15571da177e4SLinus Torvalds } 15581da177e4SLinus Torvalds } 1559a186e767SJ. Bruce Fields /* 1560a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1561a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1562a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1563a186e767SJ. Bruce Fields */ 1564a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 15651da177e4SLinus Torvalds status = nfserr_resource; 15661da177e4SLinus Torvalds if (!conf) { 15671da177e4SLinus Torvalds /* 1568a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1569a186e767SJ. Bruce Fields * placed first, because it is the normal case 15701da177e4SLinus Torvalds */ 15711da177e4SLinus Torvalds if (unconf) 15721da177e4SLinus Torvalds expire_client(unconf); 1573a55370a3SNeilBrown new = create_client(clname, dname); 1574a55370a3SNeilBrown if (new == NULL) 15751da177e4SLinus Torvalds goto out; 15761da177e4SLinus Torvalds gen_clid(new); 1577599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 15781da177e4SLinus Torvalds /* 1579a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1580a186e767SJ. Bruce Fields * probable callback update 15811da177e4SLinus Torvalds */ 158231f4a6c1SNeilBrown if (unconf) { 158331f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 158431f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 158531f4a6c1SNeilBrown * This has the advantage that there is at most 158631f4a6c1SNeilBrown * one {*x***} in either list at any time. 158731f4a6c1SNeilBrown */ 15881da177e4SLinus Torvalds expire_client(unconf); 15891da177e4SLinus Torvalds } 1590a55370a3SNeilBrown new = create_client(clname, dname); 1591a55370a3SNeilBrown if (new == NULL) 15921da177e4SLinus Torvalds goto out; 15931da177e4SLinus Torvalds copy_clid(new, conf); 15941da177e4SLinus Torvalds } else if (!unconf) { 15951da177e4SLinus Torvalds /* 1596a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1597a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1598a186e767SJ. Bruce Fields * confirmed. 15991da177e4SLinus Torvalds */ 1600a55370a3SNeilBrown new = create_client(clname, dname); 1601a55370a3SNeilBrown if (new == NULL) 16021da177e4SLinus Torvalds goto out; 16031da177e4SLinus Torvalds gen_clid(new); 160449ba8781SJ. Bruce Fields } else { 16051da177e4SLinus Torvalds /* 1606a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1607a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1608a186e767SJ. Bruce Fields * confirmed. 16091da177e4SLinus Torvalds */ 16101da177e4SLinus Torvalds expire_client(unconf); 1611a55370a3SNeilBrown new = create_client(clname, dname); 1612a55370a3SNeilBrown if (new == NULL) 16131da177e4SLinus Torvalds goto out; 16141da177e4SLinus Torvalds gen_clid(new); 16151da177e4SLinus Torvalds } 1616c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 1617c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 161861054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 161968e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 162068e76ad0SOlga Kornievskaia if (princ) { 162168e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 162268e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 162368e76ad0SOlga Kornievskaia free_client(new); 162468e76ad0SOlga Kornievskaia goto out; 162568e76ad0SOlga Kornievskaia } 162668e76ad0SOlga Kornievskaia } 1627c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 1628c175b83cSJ. Bruce Fields gen_confirm(new); 1629c175b83cSJ. Bruce Fields gen_callback(new, setclid); 1630c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 16311da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 16321da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 16331da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 16341da177e4SLinus Torvalds status = nfs_ok; 16351da177e4SLinus Torvalds out: 16361da177e4SLinus Torvalds nfs4_unlock_state(); 16371da177e4SLinus Torvalds return status; 16381da177e4SLinus Torvalds } 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds /* 1642a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1643a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1644a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 16451da177e4SLinus Torvalds */ 1646b37ad28bSAl Viro __be32 1647b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1648b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1649b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 16501da177e4SLinus Torvalds { 165127459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 165221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 16531da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 16541da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1655b37ad28bSAl Viro __be32 status; 16561da177e4SLinus Torvalds 16571da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 16581da177e4SLinus Torvalds return nfserr_stale_clientid; 16591da177e4SLinus Torvalds /* 16601da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 16611da177e4SLinus Torvalds * We get here on a DRC miss. 16621da177e4SLinus Torvalds */ 16631da177e4SLinus Torvalds 16641da177e4SLinus Torvalds nfs4_lock_state(); 166521ab45a4SNeilBrown 166621ab45a4SNeilBrown conf = find_confirmed_client(clid); 166721ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 166821ab45a4SNeilBrown 166922de4d83SNeilBrown status = nfserr_clid_inuse; 167027459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 16711da177e4SLinus Torvalds goto out; 167227459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 16731da177e4SLinus Torvalds goto out; 167421ab45a4SNeilBrown 1675a186e767SJ. Bruce Fields /* 1676a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1677a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1678a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1679a186e767SJ. Bruce Fields */ 1680366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1681a186e767SJ. Bruce Fields /* 1682a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1683a186e767SJ. Bruce Fields * callback update 16847c79f737SNeilBrown */ 1685599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 16861da177e4SLinus Torvalds status = nfserr_clid_inuse; 16871da177e4SLinus Torvalds else { 16881a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 16891a69c179SNeilBrown * change request correctly. */ 1690cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 169121ab45a4SNeilBrown gen_confirm(conf); 169246309029SNeilBrown nfsd4_remove_clid_dir(unconf); 16931a69c179SNeilBrown expire_client(unconf); 16941da177e4SLinus Torvalds status = nfs_ok; 16951a69c179SNeilBrown 16961da177e4SLinus Torvalds } 1697f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1698a186e767SJ. Bruce Fields /* 1699a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1700a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1701a186e767SJ. Bruce Fields * do nothing. 17027c79f737SNeilBrown */ 1703599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 17041da177e4SLinus Torvalds status = nfserr_clid_inuse; 170521ab45a4SNeilBrown else 17061da177e4SLinus Torvalds status = nfs_ok; 17077c79f737SNeilBrown } else if (!conf && unconf 1708599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1709a186e767SJ. Bruce Fields /* 1710a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1711a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 17121da177e4SLinus Torvalds */ 1713599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 17141da177e4SLinus Torvalds status = nfserr_clid_inuse; 17151da177e4SLinus Torvalds } else { 17161a69c179SNeilBrown unsigned int hash = 17171a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 17181a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1719a1bcecd2SAndy Adamson hash, false); 17201a69c179SNeilBrown if (conf) { 1721c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 17221a69c179SNeilBrown expire_client(conf); 17231a69c179SNeilBrown } 17241da177e4SLinus Torvalds move_to_confirmed(unconf); 172521ab45a4SNeilBrown conf = unconf; 172646f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 17271a69c179SNeilBrown status = nfs_ok; 17281da177e4SLinus Torvalds } 1729599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1730599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 17317c79f737SNeilBrown &confirm)))) { 1732a186e767SJ. Bruce Fields /* 1733a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1734a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 17351da177e4SLinus Torvalds */ 17361da177e4SLinus Torvalds status = nfserr_stale_clientid; 17377c79f737SNeilBrown } else { 17381da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 173922de4d83SNeilBrown status = nfserr_clid_inuse; 174008e8987cSNeilBrown } 17411da177e4SLinus Torvalds out: 17421da177e4SLinus Torvalds nfs4_unlock_state(); 17431da177e4SLinus Torvalds return status; 17441da177e4SLinus Torvalds } 17451da177e4SLinus Torvalds 17461da177e4SLinus Torvalds /* OPEN Share state helper functions */ 17471da177e4SLinus Torvalds static inline struct nfs4_file * 17481da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 17491da177e4SLinus Torvalds { 17501da177e4SLinus Torvalds struct nfs4_file *fp; 17511da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 17521da177e4SLinus Torvalds 1753e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1754e60d4398SNeilBrown if (fp) { 17558b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 17561da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 17578beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 17588beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 17598b671b80SJ. Bruce Fields spin_lock(&recall_lock); 17601da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 17618b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 17621da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 17631da177e4SLinus Torvalds fp->fi_id = current_fileid++; 176447f9940cSMeelap Shah fp->fi_had_conflict = false; 17651da177e4SLinus Torvalds return fp; 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds return NULL; 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds 17701da177e4SLinus Torvalds static void 1771e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1772e60d4398SNeilBrown { 1773e60d4398SNeilBrown if (*slab == NULL) 1774e60d4398SNeilBrown return; 17751a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1776e60d4398SNeilBrown *slab = NULL; 1777e60d4398SNeilBrown } 1778e60d4398SNeilBrown 1779e8ff2a84SJ. Bruce Fields void 1780e60d4398SNeilBrown nfsd4_free_slabs(void) 1781e60d4398SNeilBrown { 1782e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1783e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 17845ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 17855b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1786e60d4398SNeilBrown } 17871da177e4SLinus Torvalds 17881da177e4SLinus Torvalds static int 17891da177e4SLinus Torvalds nfsd4_init_slabs(void) 17901da177e4SLinus Torvalds { 17911da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 179220c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1793e60d4398SNeilBrown if (stateowner_slab == NULL) 1794e60d4398SNeilBrown goto out_nomem; 1795e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 179620c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1797e60d4398SNeilBrown if (file_slab == NULL) 1798e60d4398SNeilBrown goto out_nomem; 17995ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 180020c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 18015ac049acSNeilBrown if (stateid_slab == NULL) 18025ac049acSNeilBrown goto out_nomem; 18035b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 180420c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 18055b2d21c1SNeilBrown if (deleg_slab == NULL) 18065b2d21c1SNeilBrown goto out_nomem; 1807e60d4398SNeilBrown return 0; 1808e60d4398SNeilBrown out_nomem: 1809e60d4398SNeilBrown nfsd4_free_slabs(); 18101da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 18111da177e4SLinus Torvalds return -ENOMEM; 18121da177e4SLinus Torvalds } 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds void 18151da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 18161da177e4SLinus Torvalds { 18171da177e4SLinus Torvalds struct nfs4_stateowner *sop = 18181da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 18191da177e4SLinus Torvalds kfree(sop->so_owner.data); 18201da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 18211da177e4SLinus Torvalds } 18221da177e4SLinus Torvalds 18231da177e4SLinus Torvalds static inline struct nfs4_stateowner * 18241da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 18251da177e4SLinus Torvalds { 18261da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18271da177e4SLinus Torvalds 18281da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 18291da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 18301da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 18311da177e4SLinus Torvalds sop->so_owner.len = owner->len; 18321da177e4SLinus Torvalds kref_init(&sop->so_ref); 18331da177e4SLinus Torvalds return sop; 18341da177e4SLinus Torvalds } 18351da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds return NULL; 18381da177e4SLinus Torvalds } 18391da177e4SLinus Torvalds 18401da177e4SLinus Torvalds static struct nfs4_stateowner * 18411da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 18421da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18431da177e4SLinus Torvalds struct nfs4_replay *rp; 18441da177e4SLinus Torvalds unsigned int idhashval; 18451da177e4SLinus Torvalds 18461da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 18471da177e4SLinus Torvalds return NULL; 18481da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 18491da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 18501da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 18511da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1852ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1853ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 18541da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 18551da177e4SLinus Torvalds sop->so_time = 0; 18561da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 18571da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1858ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 18591da177e4SLinus Torvalds sop->so_is_open_owner = 1; 18601da177e4SLinus Torvalds sop->so_id = current_ownerid++; 18611da177e4SLinus Torvalds sop->so_client = clp; 18621da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 18631da177e4SLinus Torvalds sop->so_confirmed = 0; 18641da177e4SLinus Torvalds rp = &sop->so_replay; 1865de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 18661da177e4SLinus Torvalds rp->rp_buflen = 0; 18671da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 18681da177e4SLinus Torvalds return sop; 18691da177e4SLinus Torvalds } 18701da177e4SLinus Torvalds 18711da177e4SLinus Torvalds static inline void 18721da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 18731da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 18741da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 18751da177e4SLinus Torvalds 18761da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1877ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1878ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 18791da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 18801da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1881ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 18828beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 18831da177e4SLinus Torvalds stp->st_stateowner = sop; 188413cd2184SNeilBrown get_nfs4_file(fp); 18851da177e4SLinus Torvalds stp->st_file = fp; 188678155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 18871da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 18881da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 18891da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 18901da177e4SLinus Torvalds stp->st_access_bmap = 0; 18911da177e4SLinus Torvalds stp->st_deny_bmap = 0; 189284459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 189384459a11SAndy Adamson &stp->st_access_bmap); 18941da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 18954c4cd222SNeilBrown stp->st_openstp = NULL; 18961da177e4SLinus Torvalds } 18971da177e4SLinus Torvalds 18981da177e4SLinus Torvalds static void 18991da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 19001da177e4SLinus Torvalds { 19011da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 19021da177e4SLinus Torvalds 1903358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 19041da177e4SLinus Torvalds sop->so_time = get_seconds(); 19051da177e4SLinus Torvalds } 19061da177e4SLinus Torvalds 19071da177e4SLinus Torvalds static int 1908599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1909599e0a22SJ. Bruce Fields clientid_t *clid) 1910599e0a22SJ. Bruce Fields { 1911599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1912599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1913599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds 19161da177e4SLinus Torvalds static struct nfs4_stateowner * 19171da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 19181da177e4SLinus Torvalds { 19191da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 19201da177e4SLinus Torvalds 19211da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1922599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 19231da177e4SLinus Torvalds return so; 19241da177e4SLinus Torvalds } 19251da177e4SLinus Torvalds return NULL; 19261da177e4SLinus Torvalds } 19271da177e4SLinus Torvalds 19281da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 19291da177e4SLinus Torvalds static struct nfs4_file * 19301da177e4SLinus Torvalds find_file(struct inode *ino) 19311da177e4SLinus Torvalds { 19321da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 19331da177e4SLinus Torvalds struct nfs4_file *fp; 19341da177e4SLinus Torvalds 19358b671b80SJ. Bruce Fields spin_lock(&recall_lock); 19361da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 193713cd2184SNeilBrown if (fp->fi_inode == ino) { 193813cd2184SNeilBrown get_nfs4_file(fp); 19398b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 19401da177e4SLinus Torvalds return fp; 19411da177e4SLinus Torvalds } 194213cd2184SNeilBrown } 19438b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 19441da177e4SLinus Torvalds return NULL; 19451da177e4SLinus Torvalds } 19461da177e4SLinus Torvalds 1947d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 1948ba5a6a19SJ. Bruce Fields { 1949d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 19508838dc43SJ. Bruce Fields return 0; 1951d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 1952d87a8adeSAndy Adamson return 0; 1953d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 1954d87a8adeSAndy Adamson if (minorversion && x) { 1955d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 1956d87a8adeSAndy Adamson return 0; 1957d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 1958d87a8adeSAndy Adamson return 0; 1959d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 1960d87a8adeSAndy Adamson } 1961d87a8adeSAndy Adamson if (x) 19628838dc43SJ. Bruce Fields return 0; 19638838dc43SJ. Bruce Fields return 1; 1964ba5a6a19SJ. Bruce Fields } 1965ba5a6a19SJ. Bruce Fields 19668838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1967ba5a6a19SJ. Bruce Fields { 19688838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 19698838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1970ba5a6a19SJ. Bruce Fields } 19711da177e4SLinus Torvalds 19724f83aa30SJ. Bruce Fields /* 19734f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 19744f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 19754f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 19764f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 19774f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 19784f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 19794f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 19804f83aa30SJ. Bruce Fields * 19814f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 19824f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 19834f83aa30SJ. Bruce Fields * 19844f83aa30SJ. Bruce Fields * OPEN allow read, deny write 19854f83aa30SJ. Bruce Fields * OPEN allow both, deny none 19864f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 19874f83aa30SJ. Bruce Fields * 19884f83aa30SJ. Bruce Fields * which we should reject. 19894f83aa30SJ. Bruce Fields */ 1990fd39ca9aSNeilBrown static void 19911da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 19921da177e4SLinus Torvalds int i; 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds *access = 0; 19951da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 19961da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19971da177e4SLinus Torvalds *access |= i; 19981da177e4SLinus Torvalds } 19991da177e4SLinus Torvalds } 20001da177e4SLinus Torvalds 2001fd39ca9aSNeilBrown static void 20021da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 20031da177e4SLinus Torvalds int i; 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds *deny = 0; 20061da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 20071da177e4SLinus Torvalds if (test_bit(i, &bmap)) 20081da177e4SLinus Torvalds *deny |= i ; 20091da177e4SLinus Torvalds } 20101da177e4SLinus Torvalds } 20111da177e4SLinus Torvalds 20121da177e4SLinus Torvalds static int 20131da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 20141da177e4SLinus Torvalds unsigned int access, deny; 20151da177e4SLinus Torvalds 20161da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 20171da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 20181da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 20191da177e4SLinus Torvalds return 0; 20201da177e4SLinus Torvalds return 1; 20211da177e4SLinus Torvalds } 20221da177e4SLinus Torvalds 20231da177e4SLinus Torvalds /* 20241da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 20251da177e4SLinus Torvalds * WRITE with all zero or all one stateid 20261da177e4SLinus Torvalds */ 2027b37ad28bSAl Viro static __be32 20281da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 20291da177e4SLinus Torvalds { 20301da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20311da177e4SLinus Torvalds struct nfs4_file *fp; 20321da177e4SLinus Torvalds struct nfs4_stateid *stp; 2033b37ad28bSAl Viro __be32 ret; 20341da177e4SLinus Torvalds 20351da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds fp = find_file(ino); 203813cd2184SNeilBrown if (!fp) 203913cd2184SNeilBrown return nfs_ok; 2040b700949bSNeilBrown ret = nfserr_locked; 20411da177e4SLinus Torvalds /* Search for conflicting share reservations */ 20428beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 20431da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 20441da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 204513cd2184SNeilBrown goto out; 20461da177e4SLinus Torvalds } 204713cd2184SNeilBrown ret = nfs_ok; 204813cd2184SNeilBrown out: 204913cd2184SNeilBrown put_nfs4_file(fp); 205013cd2184SNeilBrown return ret; 20511da177e4SLinus Torvalds } 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds static inline void 20541da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 20551da177e4SLinus Torvalds { 20561da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 2057aceaf78dSDave Hansen drop_file_write_access(filp); 20581da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 20591da177e4SLinus Torvalds } 20601da177e4SLinus Torvalds } 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds /* 20631da177e4SLinus Torvalds * Recall a delegation 20641da177e4SLinus Torvalds */ 20651da177e4SLinus Torvalds static int 20661da177e4SLinus Torvalds do_recall(void *__dp) 20671da177e4SLinus Torvalds { 20681da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 20691da177e4SLinus Torvalds 207047f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 20711da177e4SLinus Torvalds nfsd4_cb_recall(dp); 20721da177e4SLinus Torvalds return 0; 20731da177e4SLinus Torvalds } 20741da177e4SLinus Torvalds 20751da177e4SLinus Torvalds /* 20761da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 20771da177e4SLinus Torvalds * by the lease (file_lock) 20781da177e4SLinus Torvalds * 20791da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 20801da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 20811da177e4SLinus Torvalds * lease. 20821da177e4SLinus Torvalds */ 20831da177e4SLinus Torvalds static 20841da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 20851da177e4SLinus Torvalds { 20861da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 20871da177e4SLinus Torvalds struct task_struct *t; 20881da177e4SLinus Torvalds 20891da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 20901da177e4SLinus Torvalds if (!dp) 20911da177e4SLinus Torvalds return; 20921da177e4SLinus Torvalds 20931da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 20941da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 20951da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 20961da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 20971da177e4SLinus Torvalds * it's safe to take a reference: */ 20981da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 2099cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 21001da177e4SLinus Torvalds 21011da177e4SLinus Torvalds spin_lock(&recall_lock); 21021da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 21031da177e4SLinus Torvalds spin_unlock(&recall_lock); 21041da177e4SLinus Torvalds 21051da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 21061da177e4SLinus Torvalds dp->dl_time = get_seconds(); 21071da177e4SLinus Torvalds 21080272e1fdSJ. Bruce Fields /* 21090272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 21100272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 21110272e1fdSJ. Bruce Fields * in time. 21120272e1fdSJ. Bruce Fields */ 21130272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 21141da177e4SLinus Torvalds 21151da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 21161da177e4SLinus Torvalds if (IS_ERR(t)) { 21171da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 21181da177e4SLinus Torvalds 21191da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 21201da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 21211da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 2122cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 21231da177e4SLinus Torvalds nfs4_put_delegation(dp); 21241da177e4SLinus Torvalds } 21251da177e4SLinus Torvalds } 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds /* 21281da177e4SLinus Torvalds * The file_lock is being reapd. 21291da177e4SLinus Torvalds * 21301da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 21311da177e4SLinus Torvalds */ 21321da177e4SLinus Torvalds static 21331da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 21341da177e4SLinus Torvalds { 21351da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 21401da177e4SLinus Torvalds return; 21411da177e4SLinus Torvalds dp->dl_flock = NULL; 21421da177e4SLinus Torvalds } 21431da177e4SLinus Torvalds 21441da177e4SLinus Torvalds /* 21451da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 21461da177e4SLinus Torvalds * 2147a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 21481da177e4SLinus Torvalds */ 21491da177e4SLinus Torvalds static 21501da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 21511da177e4SLinus Torvalds { 21521da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 21531da177e4SLinus Torvalds 21541da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 21551da177e4SLinus Torvalds if (!dp) 21561da177e4SLinus Torvalds return; 21571da177e4SLinus Torvalds dp->dl_flock = new; 21581da177e4SLinus Torvalds } 21591da177e4SLinus Torvalds 21601da177e4SLinus Torvalds /* 2161a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 21621da177e4SLinus Torvalds */ 21631da177e4SLinus Torvalds static 21641da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 21651da177e4SLinus Torvalds { 21661da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 21671da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 21681da177e4SLinus Torvalds struct nfs4_delegation *tryd = 21691da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 21701da177e4SLinus Torvalds 21711da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 21721da177e4SLinus Torvalds return 0; 21731da177e4SLinus Torvalds 21741da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 21751da177e4SLinus Torvalds } 21761da177e4SLinus Torvalds 21771da177e4SLinus Torvalds 21781da177e4SLinus Torvalds static 21791da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 21801da177e4SLinus Torvalds { 21811da177e4SLinus Torvalds if (arg & F_UNLCK) 21821da177e4SLinus Torvalds return lease_modify(onlist, arg); 21831da177e4SLinus Torvalds else 21841da177e4SLinus Torvalds return -EAGAIN; 21851da177e4SLinus Torvalds } 21861da177e4SLinus Torvalds 2187fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 21881da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 21891da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 21901da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 21911da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 21921da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 21931da177e4SLinus Torvalds }; 21941da177e4SLinus Torvalds 21951da177e4SLinus Torvalds 2196b37ad28bSAl Viro __be32 21976668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 21986668958fSAndy Adamson struct nfsd4_open *open) 21991da177e4SLinus Torvalds { 22001da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 22011da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 22021da177e4SLinus Torvalds unsigned int strhashval; 22031da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 22041da177e4SLinus Torvalds 22051da177e4SLinus Torvalds if (!check_name(open->op_owner)) 22060f442aa2SJ. Bruce Fields return nfserr_inval; 22071da177e4SLinus Torvalds 22081da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 22091da177e4SLinus Torvalds return nfserr_stale_clientid; 22101da177e4SLinus Torvalds 22111da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 22121da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 22131da177e4SLinus Torvalds open->op_stateowner = sop; 22140f442aa2SJ. Bruce Fields if (!sop) { 22150f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 22160f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 22170f442aa2SJ. Bruce Fields if (clp == NULL) 22180f442aa2SJ. Bruce Fields return nfserr_expired; 22190f442aa2SJ. Bruce Fields goto renew; 22200f442aa2SJ. Bruce Fields } 22216668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 22226668958fSAndy Adamson if (nfsd4_has_session(cstate)) 22236668958fSAndy Adamson goto renew; 2224ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 22250f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2226ae8b6253SJ. Bruce Fields clp = sop->so_client; 2227f044ff83SJ. Bruce Fields release_openowner(sop); 22280f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2229ae8b6253SJ. Bruce Fields goto renew; 22300f442aa2SJ. Bruce Fields } 22310f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 22321da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2233a90b061cSAl Viro return nfserr_replay_me; 22341da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 22351da177e4SLinus Torvalds * that we don't even have replay data saved! 22361da177e4SLinus Torvalds * Therefore, we have no choice but to continue 22371da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 22381da177e4SLinus Torvalds * fail again for the same reason. 22391da177e4SLinus Torvalds */ 22400f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 22411da177e4SLinus Torvalds goto renew; 22421da177e4SLinus Torvalds } 22430f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 22440f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 22450f442aa2SJ. Bruce Fields renew: 22460f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 22471da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 22481da177e4SLinus Torvalds if (sop == NULL) 22490f442aa2SJ. Bruce Fields return nfserr_resource; 22501da177e4SLinus Torvalds open->op_stateowner = sop; 22510f442aa2SJ. Bruce Fields } 22520f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 22531da177e4SLinus Torvalds renew_client(sop->so_client); 22540f442aa2SJ. Bruce Fields return nfs_ok; 22551da177e4SLinus Torvalds } 22561da177e4SLinus Torvalds 2257b37ad28bSAl Viro static inline __be32 22584a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 22594a6e43e6SNeilBrown { 22604a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 22614a6e43e6SNeilBrown return nfserr_openmode; 22624a6e43e6SNeilBrown else 22634a6e43e6SNeilBrown return nfs_ok; 22644a6e43e6SNeilBrown } 22654a6e43e6SNeilBrown 226652f4fb43SNeilBrown static struct nfs4_delegation * 226752f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 226852f4fb43SNeilBrown { 226952f4fb43SNeilBrown struct nfs4_delegation *dp; 227052f4fb43SNeilBrown 2271ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 227252f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 227352f4fb43SNeilBrown return dp; 227452f4fb43SNeilBrown } 227552f4fb43SNeilBrown return NULL; 227652f4fb43SNeilBrown } 227752f4fb43SNeilBrown 2278b37ad28bSAl Viro static __be32 2279567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2280567d9829SNeilBrown struct nfs4_delegation **dp) 2281567d9829SNeilBrown { 2282567d9829SNeilBrown int flags; 2283b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2284567d9829SNeilBrown 2285567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2286567d9829SNeilBrown if (*dp == NULL) 2287c44c5eebSNeilBrown goto out; 2288567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 2289567d9829SNeilBrown RD_STATE : WR_STATE; 2290567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2291567d9829SNeilBrown if (status) 2292567d9829SNeilBrown *dp = NULL; 2293c44c5eebSNeilBrown out: 2294c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2295c44c5eebSNeilBrown return nfs_ok; 2296c44c5eebSNeilBrown if (status) 2297c44c5eebSNeilBrown return status; 2298c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2299c44c5eebSNeilBrown return nfs_ok; 2300567d9829SNeilBrown } 2301567d9829SNeilBrown 2302b37ad28bSAl Viro static __be32 23031da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 23041da177e4SLinus Torvalds { 23051da177e4SLinus Torvalds struct nfs4_stateid *local; 2306b37ad28bSAl Viro __be32 status = nfserr_share_denied; 23071da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 23081da177e4SLinus Torvalds 23098beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 23101da177e4SLinus Torvalds /* ignore lock owners */ 23111da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 23121da177e4SLinus Torvalds continue; 23131da177e4SLinus Torvalds /* remember if we have seen this open owner */ 23141da177e4SLinus Torvalds if (local->st_stateowner == sop) 23151da177e4SLinus Torvalds *stpp = local; 23161da177e4SLinus Torvalds /* check for conflicting share reservations */ 23171da177e4SLinus Torvalds if (!test_share(local, open)) 23181da177e4SLinus Torvalds goto out; 23191da177e4SLinus Torvalds } 23201da177e4SLinus Torvalds status = 0; 23211da177e4SLinus Torvalds out: 23221da177e4SLinus Torvalds return status; 23231da177e4SLinus Torvalds } 23241da177e4SLinus Torvalds 23255ac049acSNeilBrown static inline struct nfs4_stateid * 23265ac049acSNeilBrown nfs4_alloc_stateid(void) 23275ac049acSNeilBrown { 23285ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 23295ac049acSNeilBrown } 23305ac049acSNeilBrown 2331b37ad28bSAl Viro static __be32 23321da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2333567d9829SNeilBrown struct nfs4_delegation *dp, 23341da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 23351da177e4SLinus Torvalds { 23361da177e4SLinus Torvalds struct nfs4_stateid *stp; 23371da177e4SLinus Torvalds 23385ac049acSNeilBrown stp = nfs4_alloc_stateid(); 23391da177e4SLinus Torvalds if (stp == NULL) 23401da177e4SLinus Torvalds return nfserr_resource; 23411da177e4SLinus Torvalds 2342567d9829SNeilBrown if (dp) { 2343567d9829SNeilBrown get_file(dp->dl_vfs_file); 2344567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 2345567d9829SNeilBrown } else { 2346b37ad28bSAl Viro __be32 status; 2347567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 2348567d9829SNeilBrown &stp->st_vfs_file); 23491da177e4SLinus Torvalds if (status) { 23501da177e4SLinus Torvalds if (status == nfserr_dropit) 23511da177e4SLinus Torvalds status = nfserr_jukebox; 23525ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 23531da177e4SLinus Torvalds return status; 23541da177e4SLinus Torvalds } 2355567d9829SNeilBrown } 23561da177e4SLinus Torvalds *stpp = stp; 23571da177e4SLinus Torvalds return 0; 23581da177e4SLinus Torvalds } 23591da177e4SLinus Torvalds 2360b37ad28bSAl Viro static inline __be32 23611da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 23621da177e4SLinus Torvalds struct nfsd4_open *open) 23631da177e4SLinus Torvalds { 23641da177e4SLinus Torvalds struct iattr iattr = { 23651da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 23661da177e4SLinus Torvalds .ia_size = 0, 23671da177e4SLinus Torvalds }; 23681da177e4SLinus Torvalds if (!open->op_truncate) 23691da177e4SLinus Torvalds return 0; 23701da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 23719246585aSAl Viro return nfserr_inval; 23721da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 23731da177e4SLinus Torvalds } 23741da177e4SLinus Torvalds 2375b37ad28bSAl Viro static __be32 23761da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 23771da177e4SLinus Torvalds { 23781da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 23797eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 23806c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 2381b37ad28bSAl Viro __be32 status; 23821da177e4SLinus Torvalds 23831da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23846c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 23856c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 23861da177e4SLinus Torvalds 23876c26d08fSJ. Bruce Fields if (new_writer) { 2388b37ad28bSAl Viro int err = get_write_access(inode); 2389b37ad28bSAl Viro if (err) 2390b37ad28bSAl Viro return nfserrno(err); 2391e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 2392e518f056SBenny Halevy if (err) 2393e518f056SBenny Halevy return nfserrno(err); 2394e518f056SBenny Halevy file_take_write(filp); 23956c26d08fSJ. Bruce Fields } 23961da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 23971da177e4SLinus Torvalds if (status) { 23986c26d08fSJ. Bruce Fields if (new_writer) 23991da177e4SLinus Torvalds put_write_access(inode); 24001da177e4SLinus Torvalds return status; 24011da177e4SLinus Torvalds } 24021da177e4SLinus Torvalds /* remember the open */ 24036c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 2404b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 2405b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds return nfs_ok; 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds static void 241237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 24131da177e4SLinus Torvalds { 24141da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2415c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 24161da177e4SLinus Torvalds } 24171da177e4SLinus Torvalds 24181da177e4SLinus Torvalds /* 24191da177e4SLinus Torvalds * Attempt to hand out a delegation. 24201da177e4SLinus Torvalds */ 24211da177e4SLinus Torvalds static void 24221da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 24231da177e4SLinus Torvalds { 24241da177e4SLinus Torvalds struct nfs4_delegation *dp; 24251da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 24261da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 24271da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 24281da177e4SLinus Torvalds int status, flag = 0; 24291da177e4SLinus Torvalds 24301da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24317b190fecSNeilBrown open->op_recall = 0; 24327b190fecSNeilBrown switch (open->op_claim_type) { 24337b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 24347b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 24357b190fecSNeilBrown open->op_recall = 1; 24367b190fecSNeilBrown flag = open->op_delegate_type; 24377b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 24381da177e4SLinus Torvalds goto out; 24397b190fecSNeilBrown break; 24407b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 24417b190fecSNeilBrown /* Let's not give out any delegations till everyone's 24427b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2443af558e33SJ. Bruce Fields if (locks_in_grace()) 24447b190fecSNeilBrown goto out; 24457b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 24467b190fecSNeilBrown goto out; 24471da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 24481da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 24491da177e4SLinus Torvalds else 24501da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 24517b190fecSNeilBrown break; 24527b190fecSNeilBrown default: 24537b190fecSNeilBrown goto out; 24547b190fecSNeilBrown } 24551da177e4SLinus Torvalds 24561da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 24571da177e4SLinus Torvalds if (dp == NULL) { 24581da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24591da177e4SLinus Torvalds goto out; 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds locks_init_lock(&fl); 24621da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 24631da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 24649167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 24651da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 24661da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 24671da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 24681da177e4SLinus Torvalds fl.fl_pid = current->tgid; 24691da177e4SLinus Torvalds 2470a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 24711da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 24721da177e4SLinus Torvalds */ 24739167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 24741da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2475c907132dSNeilBrown unhash_delegation(dp); 24761da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24771da177e4SLinus Torvalds goto out; 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds 24801da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 24831da177e4SLinus Torvalds dp->dl_stateid.si_boot, 24841da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 24851da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 24861da177e4SLinus Torvalds dp->dl_stateid.si_generation); 24871da177e4SLinus Torvalds out: 24887b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 24897b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 24907b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 24912fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 24921da177e4SLinus Torvalds open->op_delegate_type = flag; 24931da177e4SLinus Torvalds } 24941da177e4SLinus Torvalds 24951da177e4SLinus Torvalds /* 24961da177e4SLinus Torvalds * called with nfs4_lock_state() held. 24971da177e4SLinus Torvalds */ 2498b37ad28bSAl Viro __be32 24991da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 25001da177e4SLinus Torvalds { 25016668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 25021da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 25031da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25041da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2505567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2506b37ad28bSAl Viro __be32 status; 25071da177e4SLinus Torvalds 25081da177e4SLinus Torvalds status = nfserr_inval; 2509d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2510ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 25111da177e4SLinus Torvalds goto out; 25121da177e4SLinus Torvalds /* 25131da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 25141da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 25151da177e4SLinus Torvalds * If not found, create the nfs4_file struct 25161da177e4SLinus Torvalds */ 25171da177e4SLinus Torvalds fp = find_file(ino); 25181da177e4SLinus Torvalds if (fp) { 25191da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 25201da177e4SLinus Torvalds goto out; 2521c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2522c44c5eebSNeilBrown if (status) 2523c44c5eebSNeilBrown goto out; 25241da177e4SLinus Torvalds } else { 2525c44c5eebSNeilBrown status = nfserr_bad_stateid; 2526c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2527c44c5eebSNeilBrown goto out; 25281da177e4SLinus Torvalds status = nfserr_resource; 25291da177e4SLinus Torvalds fp = alloc_init_file(ino); 25301da177e4SLinus Torvalds if (fp == NULL) 25311da177e4SLinus Torvalds goto out; 25321da177e4SLinus Torvalds } 25331da177e4SLinus Torvalds 25341da177e4SLinus Torvalds /* 25351da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 25361da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 25371da177e4SLinus Torvalds */ 25381da177e4SLinus Torvalds if (stp) { 25391da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 25401da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 25411da177e4SLinus Torvalds if (status) 25421da177e4SLinus Torvalds goto out; 2543444c2c07SNeilBrown update_stateid(&stp->st_stateid); 25441da177e4SLinus Torvalds } else { 25451da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 25461da177e4SLinus Torvalds int flags = 0; 25479ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 25488837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 25491da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 25508837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 2551567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 2552567d9829SNeilBrown if (status) 25531da177e4SLinus Torvalds goto out; 25541da177e4SLinus Torvalds init_stateid(stp, fp, open); 25551da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 25561da177e4SLinus Torvalds if (status) { 25572283963fSJ. Bruce Fields release_open_stateid(stp); 25581da177e4SLinus Torvalds goto out; 25591da177e4SLinus Torvalds } 25606668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 25616668958fSAndy Adamson update_stateid(&stp->st_stateid); 25621da177e4SLinus Torvalds } 25631da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 25641da177e4SLinus Torvalds 25656668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 25666668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 25676668958fSAndy Adamson 25681da177e4SLinus Torvalds /* 25691da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 25701da177e4SLinus Torvalds * OPEN succeeds even if we fail. 25711da177e4SLinus Torvalds */ 25721da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 25731da177e4SLinus Torvalds 25741da177e4SLinus Torvalds status = nfs_ok; 25751da177e4SLinus Torvalds 25761da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 25771da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 25781da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 25791da177e4SLinus Torvalds out: 258013cd2184SNeilBrown if (fp) 258113cd2184SNeilBrown put_nfs4_file(fp); 258237515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 258337515177SNeilBrown nfs4_set_claim_prev(open); 25841da177e4SLinus Torvalds /* 25851da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 25861da177e4SLinus Torvalds */ 25871da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 25886668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 25896668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 25901da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds return status; 25931da177e4SLinus Torvalds } 25941da177e4SLinus Torvalds 2595b37ad28bSAl Viro __be32 2596b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2597b591480bSJ.Bruce Fields clientid_t *clid) 25981da177e4SLinus Torvalds { 25991da177e4SLinus Torvalds struct nfs4_client *clp; 2600b37ad28bSAl Viro __be32 status; 26011da177e4SLinus Torvalds 26021da177e4SLinus Torvalds nfs4_lock_state(); 26031da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 26041da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 26051da177e4SLinus Torvalds status = nfserr_stale_clientid; 26061da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 26071da177e4SLinus Torvalds goto out; 26081da177e4SLinus Torvalds clp = find_confirmed_client(clid); 26091da177e4SLinus Torvalds status = nfserr_expired; 26101da177e4SLinus Torvalds if (clp == NULL) { 26111da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 26121da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 26131da177e4SLinus Torvalds goto out; 26141da177e4SLinus Torvalds } 26151da177e4SLinus Torvalds renew_client(clp); 26161da177e4SLinus Torvalds status = nfserr_cb_path_down; 2617ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 26181da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 26191da177e4SLinus Torvalds goto out; 26201da177e4SLinus Torvalds status = nfs_ok; 26211da177e4SLinus Torvalds out: 26221da177e4SLinus Torvalds nfs4_unlock_state(); 26231da177e4SLinus Torvalds return status; 26241da177e4SLinus Torvalds } 26251da177e4SLinus Torvalds 2626af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2627af558e33SJ. Bruce Fields }; 2628af558e33SJ. Bruce Fields 2629a76b4319SNeilBrown static void 2630af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2631a76b4319SNeilBrown { 2632a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2633c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2634af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2635a76b4319SNeilBrown } 2636a76b4319SNeilBrown 2637fd39ca9aSNeilBrown static time_t 26381da177e4SLinus Torvalds nfs4_laundromat(void) 26391da177e4SLinus Torvalds { 26401da177e4SLinus Torvalds struct nfs4_client *clp; 26411da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26421da177e4SLinus Torvalds struct nfs4_delegation *dp; 26431da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 26441da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 26451da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 26461da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 26471da177e4SLinus Torvalds 26481da177e4SLinus Torvalds nfs4_lock_state(); 26491da177e4SLinus Torvalds 26501da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2651af558e33SJ. Bruce Fields if (locks_in_grace()) 2652af558e33SJ. Bruce Fields nfsd4_end_grace(); 26531da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 26541da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 26551da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 26561da177e4SLinus Torvalds t = clp->cl_time - cutoff; 26571da177e4SLinus Torvalds if (clientid_val > t) 26581da177e4SLinus Torvalds clientid_val = t; 26591da177e4SLinus Torvalds break; 26601da177e4SLinus Torvalds } 26611da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 26621da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2663c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 26641da177e4SLinus Torvalds expire_client(clp); 26651da177e4SLinus Torvalds } 26661da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 26671da177e4SLinus Torvalds spin_lock(&recall_lock); 26681da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 26691da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 26701da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 26711da177e4SLinus Torvalds u = dp->dl_time - cutoff; 26721da177e4SLinus Torvalds if (test_val > u) 26731da177e4SLinus Torvalds test_val = u; 26741da177e4SLinus Torvalds break; 26751da177e4SLinus Torvalds } 26761da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 26771da177e4SLinus Torvalds dp, dp->dl_flock); 26781da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 26791da177e4SLinus Torvalds } 26801da177e4SLinus Torvalds spin_unlock(&recall_lock); 26811da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 26821da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 26831da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 26841da177e4SLinus Torvalds unhash_delegation(dp); 26851da177e4SLinus Torvalds } 26861da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 26871da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 26881da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 26891da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 26901da177e4SLinus Torvalds u = sop->so_time - cutoff; 26911da177e4SLinus Torvalds if (test_val > u) 26921da177e4SLinus Torvalds test_val = u; 26931da177e4SLinus Torvalds break; 26941da177e4SLinus Torvalds } 26951da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 26961da177e4SLinus Torvalds sop->so_id); 2697f044ff83SJ. Bruce Fields release_openowner(sop); 26981da177e4SLinus Torvalds } 26991da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 27001da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 27011da177e4SLinus Torvalds nfs4_unlock_state(); 27021da177e4SLinus Torvalds return clientid_val; 27031da177e4SLinus Torvalds } 27041da177e4SLinus Torvalds 2705a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2706a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2707a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2708a254b246SHarvey Harrison 2709a254b246SHarvey Harrison static void 2710c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 27111da177e4SLinus Torvalds { 27121da177e4SLinus Torvalds time_t t; 27131da177e4SLinus Torvalds 27141da177e4SLinus Torvalds t = nfs4_laundromat(); 27151da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 271658da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 27171da177e4SLinus Torvalds } 27181da177e4SLinus Torvalds 2719fd39ca9aSNeilBrown static struct nfs4_stateowner * 2720f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2721f8816512SNeilBrown { 27221da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 27231da177e4SLinus Torvalds 27241da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 27251da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 27261da177e4SLinus Torvalds if (local->so_id == st_id) 27271da177e4SLinus Torvalds return local; 27281da177e4SLinus Torvalds } 27291da177e4SLinus Torvalds } 27301da177e4SLinus Torvalds return NULL; 27311da177e4SLinus Torvalds } 27321da177e4SLinus Torvalds 27331da177e4SLinus Torvalds static inline int 27341da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 27351da177e4SLinus Torvalds { 27367eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 27371da177e4SLinus Torvalds } 27381da177e4SLinus Torvalds 27391da177e4SLinus Torvalds static int 27401da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 27411da177e4SLinus Torvalds { 274278155ed7SBian Naimeng if (time_after((unsigned long)boot_time, 274378155ed7SBian Naimeng (unsigned long)stateid->si_boot)) { 2744849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 274578155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 274678155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 27471da177e4SLinus Torvalds return 1; 27481da177e4SLinus Torvalds } 274978155ed7SBian Naimeng return 0; 275078155ed7SBian Naimeng } 275178155ed7SBian Naimeng 275278155ed7SBian Naimeng static int 275378155ed7SBian Naimeng EXPIRED_STATEID(stateid_t *stateid) 275478155ed7SBian Naimeng { 275578155ed7SBian Naimeng if (time_before((unsigned long)boot_time, 275678155ed7SBian Naimeng ((unsigned long)stateid->si_boot)) && 2757b8fd47aeSJ. Bruce Fields time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { 275878155ed7SBian Naimeng dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n", 275978155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 276078155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 276178155ed7SBian Naimeng return 1; 276278155ed7SBian Naimeng } 276378155ed7SBian Naimeng return 0; 276478155ed7SBian Naimeng } 276578155ed7SBian Naimeng 276678155ed7SBian Naimeng static __be32 276778155ed7SBian Naimeng stateid_error_map(stateid_t *stateid) 276878155ed7SBian Naimeng { 276978155ed7SBian Naimeng if (STALE_STATEID(stateid)) 277078155ed7SBian Naimeng return nfserr_stale_stateid; 277178155ed7SBian Naimeng if (EXPIRED_STATEID(stateid)) 277278155ed7SBian Naimeng return nfserr_expired; 277378155ed7SBian Naimeng 277478155ed7SBian Naimeng dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n", 277578155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 277678155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 277778155ed7SBian Naimeng return nfserr_bad_stateid; 277878155ed7SBian Naimeng } 27791da177e4SLinus Torvalds 27801da177e4SLinus Torvalds static inline int 27811da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 27821da177e4SLinus Torvalds { 27831da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 27841da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 27851da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 27861da177e4SLinus Torvalds } 27871da177e4SLinus Torvalds 27881da177e4SLinus Torvalds static inline int 27891da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 27901da177e4SLinus Torvalds { 27911da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 27921da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 27931da177e4SLinus Torvalds } 27941da177e4SLinus Torvalds 27951da177e4SLinus Torvalds static 2796b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 27971da177e4SLinus Torvalds { 2798b37ad28bSAl Viro __be32 status = nfserr_openmode; 27991da177e4SLinus Torvalds 28001da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 28011da177e4SLinus Torvalds goto out; 28021da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 28031da177e4SLinus Torvalds goto out; 28041da177e4SLinus Torvalds status = nfs_ok; 28051da177e4SLinus Torvalds out: 28061da177e4SLinus Torvalds return status; 28071da177e4SLinus Torvalds } 28081da177e4SLinus Torvalds 2809b37ad28bSAl Viro static inline __be32 28101da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 28111da177e4SLinus Torvalds { 2812203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 28131da177e4SLinus Torvalds return nfs_ok; 2814af558e33SJ. Bruce Fields else if (locks_in_grace()) { 28151da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 28161da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 28171da177e4SLinus Torvalds return nfserr_grace; 28181da177e4SLinus Torvalds } else if (flags & WR_STATE) 28191da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 28201da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 28211da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 28221da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 28231da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 28241da177e4SLinus Torvalds } 28251da177e4SLinus Torvalds 28261da177e4SLinus Torvalds /* 28271da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 28281da177e4SLinus Torvalds * that are not able to provide mandatory locking. 28291da177e4SLinus Torvalds */ 28301da177e4SLinus Torvalds static inline int 283118f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 28321da177e4SLinus Torvalds { 2833203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 28341da177e4SLinus Torvalds } 28351da177e4SLinus Torvalds 28366668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 28370836f587SJ. Bruce Fields { 28386668958fSAndy Adamson /* 28396668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 28406668958fSAndy Adamson * when it is zero. 28416668958fSAndy Adamson */ 28426668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 28436668958fSAndy Adamson goto out; 28446668958fSAndy Adamson 28450836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 28460836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 28470836f587SJ. Bruce Fields return nfserr_bad_stateid; 28480836f587SJ. Bruce Fields /* 28490836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 28500836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 28510836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 28520836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 28530836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 28540836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 28550836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 28560836f587SJ. Bruce Fields * will just have to retry the IO: 28570836f587SJ. Bruce Fields */ 28580836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 28590836f587SJ. Bruce Fields return nfserr_old_stateid; 28606668958fSAndy Adamson out: 28610836f587SJ. Bruce Fields return nfs_ok; 28620836f587SJ. Bruce Fields } 28630836f587SJ. Bruce Fields 28643e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 28653e633079SJ. Bruce Fields { 28663e633079SJ. Bruce Fields return stateid->si_fileid == 0; 28673e633079SJ. Bruce Fields } 28683e633079SJ. Bruce Fields 28691da177e4SLinus Torvalds /* 28701da177e4SLinus Torvalds * Checks for stateid operations 28711da177e4SLinus Torvalds */ 2872b37ad28bSAl Viro __be32 2873dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 2874dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 28751da177e4SLinus Torvalds { 28761da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 28771da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 2878dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 28791da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2880b37ad28bSAl Viro __be32 status; 28811da177e4SLinus Torvalds 28821da177e4SLinus Torvalds if (filpp) 28831da177e4SLinus Torvalds *filpp = NULL; 28841da177e4SLinus Torvalds 288518f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 28861da177e4SLinus Torvalds return nfserr_grace; 28871da177e4SLinus Torvalds 28886668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28896668958fSAndy Adamson flags |= HAS_SESSION; 28906668958fSAndy Adamson 28911da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 28921da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 28931da177e4SLinus Torvalds 28941da177e4SLinus Torvalds status = nfserr_stale_stateid; 28951da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28961da177e4SLinus Torvalds goto out; 28971da177e4SLinus Torvalds 28981da177e4SLinus Torvalds status = nfserr_bad_stateid; 28993e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2900a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 290178155ed7SBian Naimeng if (!dp) { 290278155ed7SBian Naimeng status = stateid_error_map(stateid); 29031da177e4SLinus Torvalds goto out; 290478155ed7SBian Naimeng } 29056668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 29066668958fSAndy Adamson flags); 29070c2a498fSJ. Bruce Fields if (status) 29080c2a498fSJ. Bruce Fields goto out; 2909dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2910dc9bf700SJ. Bruce Fields if (status) 2911dc9bf700SJ. Bruce Fields goto out; 2912dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2913dc9bf700SJ. Bruce Fields if (filpp) 2914dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 29151da177e4SLinus Torvalds } else { /* open or lock stateid */ 2916a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 291778155ed7SBian Naimeng if (!stp) { 291878155ed7SBian Naimeng status = stateid_error_map(stateid); 29191da177e4SLinus Torvalds goto out; 292078155ed7SBian Naimeng } 29216150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 29221da177e4SLinus Torvalds goto out; 29231da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 29241da177e4SLinus Torvalds goto out; 29256668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 29266668958fSAndy Adamson flags); 29270836f587SJ. Bruce Fields if (status) 29281da177e4SLinus Torvalds goto out; 2929a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2930a4455be0SJ. Bruce Fields if (status) 29311da177e4SLinus Torvalds goto out; 29321da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 29331da177e4SLinus Torvalds if (filpp) 29341da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 29351da177e4SLinus Torvalds } 29361da177e4SLinus Torvalds status = nfs_ok; 29371da177e4SLinus Torvalds out: 29381da177e4SLinus Torvalds return status; 29391da177e4SLinus Torvalds } 29401da177e4SLinus Torvalds 29414c4cd222SNeilBrown static inline int 29424c4cd222SNeilBrown setlkflg (int type) 29434c4cd222SNeilBrown { 29444c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 29454c4cd222SNeilBrown RD_STATE : WR_STATE; 29464c4cd222SNeilBrown } 29471da177e4SLinus Torvalds 29481da177e4SLinus Torvalds /* 29491da177e4SLinus Torvalds * Checks for sequence id mutating operations. 29501da177e4SLinus Torvalds */ 2951b37ad28bSAl Viro static __be32 2952dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 2953dd453dfdSBenny Halevy stateid_t *stateid, int flags, 2954dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 2955dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 29561da177e4SLinus Torvalds { 29571da177e4SLinus Torvalds struct nfs4_stateid *stp; 29581da177e4SLinus Torvalds struct nfs4_stateowner *sop; 2959dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 29600836f587SJ. Bruce Fields __be32 status; 29611da177e4SLinus Torvalds 29621da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 29631da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 29641da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 29651da177e4SLinus Torvalds stateid->si_generation); 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds *stpp = NULL; 29681da177e4SLinus Torvalds *sopp = NULL; 29691da177e4SLinus Torvalds 29701da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 29712fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 29723a4f98bbSNeilBrown return nfserr_bad_stateid; 29731da177e4SLinus Torvalds } 29741da177e4SLinus Torvalds 29751da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 29763a4f98bbSNeilBrown return nfserr_stale_stateid; 29776668958fSAndy Adamson 29786668958fSAndy Adamson if (nfsd4_has_session(cstate)) 29796668958fSAndy Adamson flags |= HAS_SESSION; 29806668958fSAndy Adamson 29811da177e4SLinus Torvalds /* 29821da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 29831da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 29841da177e4SLinus Torvalds * number is incorrect. 29851da177e4SLinus Torvalds */ 2986f8816512SNeilBrown stp = find_stateid(stateid, flags); 2987f8816512SNeilBrown if (stp == NULL) { 2988f8816512SNeilBrown /* 2989f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2990f8816512SNeilBrown * a replayed close: 2991f8816512SNeilBrown */ 2992f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2993f8816512SNeilBrown if (sop == NULL) 299478155ed7SBian Naimeng return stateid_error_map(stateid); 2995f8816512SNeilBrown *sopp = sop; 2996f8816512SNeilBrown goto check_replay; 2997f8816512SNeilBrown } 29981da177e4SLinus Torvalds 299939325bd0SJ. Bruce Fields *stpp = stp; 300039325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 300139325bd0SJ. Bruce Fields 30024c4cd222SNeilBrown if (lock) { 30034c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 30041da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 30054c4cd222SNeilBrown int lkflg = 0; 3006b37ad28bSAl Viro __be32 status; 30071da177e4SLinus Torvalds 30084c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 30094c4cd222SNeilBrown 30104c4cd222SNeilBrown if (lock->lk_is_new) { 30111da177e4SLinus Torvalds if (!sop->so_is_open_owner) 30123a4f98bbSNeilBrown return nfserr_bad_stateid; 301360adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 301460adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 30153a4f98bbSNeilBrown return nfserr_bad_stateid; 30164c4cd222SNeilBrown /* stp is the open stateid */ 30174c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 30184c4cd222SNeilBrown if (status) 30194c4cd222SNeilBrown return status; 30204c4cd222SNeilBrown } else { 30214c4cd222SNeilBrown /* stp is the lock stateid */ 30224c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 30234c4cd222SNeilBrown if (status) 30244c4cd222SNeilBrown return status; 30254c4cd222SNeilBrown } 30261da177e4SLinus Torvalds } 30271da177e4SLinus Torvalds 3028f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 30292fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 30303a4f98bbSNeilBrown return nfserr_bad_stateid; 30311da177e4SLinus Torvalds } 30321da177e4SLinus Torvalds 30331da177e4SLinus Torvalds /* 30341da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 30351da177e4SLinus Torvalds * For the moment, we ignore the possibility of 30361da177e4SLinus Torvalds * generation number wraparound. 30371da177e4SLinus Torvalds */ 30386668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 30391da177e4SLinus Torvalds goto check_replay; 30401da177e4SLinus Torvalds 30413a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 30422fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 30433a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 30443a4f98bbSNeilBrown return nfserr_bad_stateid; 30451da177e4SLinus Torvalds } 30463a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 30472fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 30483a4f98bbSNeilBrown " confirmed yet!\n"); 30493a4f98bbSNeilBrown return nfserr_bad_stateid; 30501da177e4SLinus Torvalds } 30516668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 30520836f587SJ. Bruce Fields if (status) 30530836f587SJ. Bruce Fields return status; 305452fd004eSNeilBrown renew_client(sop->so_client); 30553a4f98bbSNeilBrown return nfs_ok; 30561da177e4SLinus Torvalds 30571da177e4SLinus Torvalds check_replay: 3058bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3059849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 30601da177e4SLinus Torvalds /* indicate replay to calling function */ 3061a90b061cSAl Viro return nfserr_replay_me; 30621da177e4SLinus Torvalds } 30632fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 30643a4f98bbSNeilBrown sop->so_seqid, seqid); 30653a4f98bbSNeilBrown *sopp = NULL; 30663a4f98bbSNeilBrown return nfserr_bad_seqid; 30671da177e4SLinus Torvalds } 30681da177e4SLinus Torvalds 3069b37ad28bSAl Viro __be32 3070ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3071a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 30721da177e4SLinus Torvalds { 3073b37ad28bSAl Viro __be32 status; 30741da177e4SLinus Torvalds struct nfs4_stateowner *sop; 30751da177e4SLinus Torvalds struct nfs4_stateid *stp; 30761da177e4SLinus Torvalds 30771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3078ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3079ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 30801da177e4SLinus Torvalds 3081ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3082a8cddc5dSJ. Bruce Fields if (status) 3083a8cddc5dSJ. Bruce Fields return status; 30841da177e4SLinus Torvalds 30851da177e4SLinus Torvalds nfs4_lock_state(); 30861da177e4SLinus Torvalds 3087dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3088ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3089f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 30901da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 30911da177e4SLinus Torvalds goto out; 30921da177e4SLinus Torvalds 30931da177e4SLinus Torvalds sop = oc->oc_stateowner; 30941da177e4SLinus Torvalds sop->so_confirmed = 1; 30951da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30961da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 30971da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 30981da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 30991da177e4SLinus Torvalds stp->st_stateid.si_boot, 31001da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 31011da177e4SLinus Torvalds stp->st_stateid.si_fileid, 31021da177e4SLinus Torvalds stp->st_stateid.si_generation); 3103c7b9a459SNeilBrown 3104c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 31051da177e4SLinus Torvalds out: 3106f2327d9aSNeil Brown if (oc->oc_stateowner) { 31071da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3108a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3109f2327d9aSNeil Brown } 31101da177e4SLinus Torvalds nfs4_unlock_state(); 31111da177e4SLinus Torvalds return status; 31121da177e4SLinus Torvalds } 31131da177e4SLinus Torvalds 31141da177e4SLinus Torvalds 31151da177e4SLinus Torvalds /* 31161da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 31171da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 31181da177e4SLinus Torvalds */ 31191da177e4SLinus Torvalds static void 31201da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 31211da177e4SLinus Torvalds { 31221da177e4SLinus Torvalds int i; 31231da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 31241da177e4SLinus Torvalds if ((i & access) != i) 31251da177e4SLinus Torvalds __clear_bit(i, bmap); 31261da177e4SLinus Torvalds } 31271da177e4SLinus Torvalds } 31281da177e4SLinus Torvalds 31291da177e4SLinus Torvalds static void 31301da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 31311da177e4SLinus Torvalds { 31321da177e4SLinus Torvalds int i; 31331da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 31341da177e4SLinus Torvalds if ((i & deny) != i) 31351da177e4SLinus Torvalds __clear_bit(i, bmap); 31361da177e4SLinus Torvalds } 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds 3139b37ad28bSAl Viro __be32 3140ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3141ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3142a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 31431da177e4SLinus Torvalds { 3144b37ad28bSAl Viro __be32 status; 31451da177e4SLinus Torvalds struct nfs4_stateid *stp; 31461da177e4SLinus Torvalds unsigned int share_access; 31471da177e4SLinus Torvalds 31481da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3149ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3150ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 31511da177e4SLinus Torvalds 3152d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3153ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 31541da177e4SLinus Torvalds return nfserr_inval; 31551da177e4SLinus Torvalds 31561da177e4SLinus Torvalds nfs4_lock_state(); 3157dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3158ca364317SJ.Bruce Fields od->od_seqid, 31591da177e4SLinus Torvalds &od->od_stateid, 3160f3362737SJ. Bruce Fields OPEN_STATE, 31611da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 31621da177e4SLinus Torvalds goto out; 31631da177e4SLinus Torvalds 31641da177e4SLinus Torvalds status = nfserr_inval; 31651da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 31661da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 31671da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 31681da177e4SLinus Torvalds goto out; 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 31711da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 31721da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 31731da177e4SLinus Torvalds goto out; 31741da177e4SLinus Torvalds } 31751da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 31761da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 31771da177e4SLinus Torvalds share_access & ~od->od_share_access); 31781da177e4SLinus Torvalds 31791da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 31801da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 31811da177e4SLinus Torvalds 31821da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 31831da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 31841da177e4SLinus Torvalds status = nfs_ok; 31851da177e4SLinus Torvalds out: 3186f2327d9aSNeil Brown if (od->od_stateowner) { 31871da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3188a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3189f2327d9aSNeil Brown } 31901da177e4SLinus Torvalds nfs4_unlock_state(); 31911da177e4SLinus Torvalds return status; 31921da177e4SLinus Torvalds } 31931da177e4SLinus Torvalds 31941da177e4SLinus Torvalds /* 31951da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 31961da177e4SLinus Torvalds */ 3197b37ad28bSAl Viro __be32 3198ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3199a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 32001da177e4SLinus Torvalds { 3201b37ad28bSAl Viro __be32 status; 32021da177e4SLinus Torvalds struct nfs4_stateid *stp; 32031da177e4SLinus Torvalds 32041da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3205ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3206ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 32071da177e4SLinus Torvalds 32081da177e4SLinus Torvalds nfs4_lock_state(); 32091da177e4SLinus Torvalds /* check close_lru for replay */ 3210dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3211ca364317SJ.Bruce Fields close->cl_seqid, 32121da177e4SLinus Torvalds &close->cl_stateid, 3213f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 32141da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 32151da177e4SLinus Torvalds goto out; 32161da177e4SLinus Torvalds status = nfs_ok; 32171da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 32181da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 32191da177e4SLinus Torvalds 322004ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 32212283963fSJ. Bruce Fields release_open_stateid(stp); 322204ef5954SJ. Bruce Fields 322304ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 322404ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 322504ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 322604ef5954SJ. Bruce Fields */ 322704ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 322804ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 32291da177e4SLinus Torvalds out: 3230f2327d9aSNeil Brown if (close->cl_stateowner) { 32311da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3232a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3233f2327d9aSNeil Brown } 32341da177e4SLinus Torvalds nfs4_unlock_state(); 32351da177e4SLinus Torvalds return status; 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 3238b37ad28bSAl Viro __be32 3239ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3240ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 32411da177e4SLinus Torvalds { 3242203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3243203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3244203a8c8eSJ. Bruce Fields struct inode *inode; 3245b37ad28bSAl Viro __be32 status; 32466668958fSAndy Adamson int flags = 0; 32471da177e4SLinus Torvalds 3248ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3249203a8c8eSJ. Bruce Fields return status; 3250203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 32511da177e4SLinus Torvalds 32526668958fSAndy Adamson if (nfsd4_has_session(cstate)) 32536668958fSAndy Adamson flags |= HAS_SESSION; 32541da177e4SLinus Torvalds nfs4_lock_state(); 3255203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3256203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3257203a8c8eSJ. Bruce Fields goto out; 3258203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3259203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3260203a8c8eSJ. Bruce Fields goto out; 32617e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3262203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3263203a8c8eSJ. Bruce Fields goto out; 3264203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 326578155ed7SBian Naimeng if (!dp) { 326678155ed7SBian Naimeng status = stateid_error_map(stateid); 3267203a8c8eSJ. Bruce Fields goto out; 326878155ed7SBian Naimeng } 32696668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3270203a8c8eSJ. Bruce Fields if (status) 3271203a8c8eSJ. Bruce Fields goto out; 3272203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3273203a8c8eSJ. Bruce Fields 3274203a8c8eSJ. Bruce Fields unhash_delegation(dp); 32751da177e4SLinus Torvalds out: 3276203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3277203a8c8eSJ. Bruce Fields 32781da177e4SLinus Torvalds return status; 32791da177e4SLinus Torvalds } 32801da177e4SLinus Torvalds 32811da177e4SLinus Torvalds 32821da177e4SLinus Torvalds /* 32831da177e4SLinus Torvalds * Lock owner state (byte-range locks) 32841da177e4SLinus Torvalds */ 32851da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 32861da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 32871da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 32881da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 32891da177e4SLinus Torvalds 329087df4de8SBenny Halevy static inline u64 329187df4de8SBenny Halevy end_offset(u64 start, u64 len) 329287df4de8SBenny Halevy { 329387df4de8SBenny Halevy u64 end; 329487df4de8SBenny Halevy 329587df4de8SBenny Halevy end = start + len; 329687df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 329787df4de8SBenny Halevy } 329887df4de8SBenny Halevy 329987df4de8SBenny Halevy /* last octet in a range */ 330087df4de8SBenny Halevy static inline u64 330187df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 330287df4de8SBenny Halevy { 330387df4de8SBenny Halevy u64 end; 330487df4de8SBenny Halevy 330587df4de8SBenny Halevy BUG_ON(!len); 330687df4de8SBenny Halevy end = start + len; 330787df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 330887df4de8SBenny Halevy } 330987df4de8SBenny Halevy 33101da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 33111da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 33121da177e4SLinus Torvalds 33131da177e4SLinus Torvalds static inline unsigned int 33141da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 33151da177e4SLinus Torvalds struct xdr_netobj *ownername) 33161da177e4SLinus Torvalds { 33171da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 33181da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 33191da177e4SLinus Torvalds & LOCK_HASH_MASK; 33201da177e4SLinus Torvalds } 33211da177e4SLinus Torvalds 33221da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 33231da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 33241da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 33251da177e4SLinus Torvalds 3326fd39ca9aSNeilBrown static struct nfs4_stateid * 33271da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 33281da177e4SLinus Torvalds { 33299346eff0SKrishna Kumar struct nfs4_stateid *local; 33301da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 33311da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 33321da177e4SLinus Torvalds unsigned int hashval; 33331da177e4SLinus Torvalds 33341da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 33359346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 33361da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 33371da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 33381da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 33391da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 33401da177e4SLinus Torvalds return local; 33411da177e4SLinus Torvalds } 33421da177e4SLinus Torvalds } 33439346eff0SKrishna Kumar 33449346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 33451da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 33461da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 33471da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 33481da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 33491da177e4SLinus Torvalds return local; 33501da177e4SLinus Torvalds } 3351849823c5SNeil Brown } 33521da177e4SLinus Torvalds return NULL; 33531da177e4SLinus Torvalds } 33541da177e4SLinus Torvalds 33551da177e4SLinus Torvalds static struct nfs4_delegation * 33561da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 33571da177e4SLinus Torvalds { 335813cd2184SNeilBrown struct nfs4_file *fp; 335913cd2184SNeilBrown struct nfs4_delegation *dl; 33601da177e4SLinus Torvalds 33611da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 33621da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 33631da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 33641da177e4SLinus Torvalds 33651da177e4SLinus Torvalds fp = find_file(ino); 336613cd2184SNeilBrown if (!fp) 33671da177e4SLinus Torvalds return NULL; 336813cd2184SNeilBrown dl = find_delegation_file(fp, stid); 336913cd2184SNeilBrown put_nfs4_file(fp); 337013cd2184SNeilBrown return dl; 33711da177e4SLinus Torvalds } 33721da177e4SLinus Torvalds 33731da177e4SLinus Torvalds /* 33741da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 33751da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 33761da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 33771da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 33781da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 33791da177e4SLinus Torvalds * the VFS, but this is a very deep change! 33801da177e4SLinus Torvalds */ 33811da177e4SLinus Torvalds static inline void 33821da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 33831da177e4SLinus Torvalds { 33841da177e4SLinus Torvalds if (lock->fl_start < 0) 33851da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 33861da177e4SLinus Torvalds if (lock->fl_end < 0) 33871da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 33881da177e4SLinus Torvalds } 33891da177e4SLinus Torvalds 3390d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3391d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 3392e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 3393d5b9026aSNeilBrown }; 33941da177e4SLinus Torvalds 33951da177e4SLinus Torvalds static inline void 33961da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 33971da177e4SLinus Torvalds { 3398d5b9026aSNeilBrown struct nfs4_stateowner *sop; 3399d5b9026aSNeilBrown unsigned int hval; 34001da177e4SLinus Torvalds 3401d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3402d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 3403d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 34041da177e4SLinus Torvalds kref_get(&sop->so_ref); 34051da177e4SLinus Torvalds deny->ld_sop = sop; 34061da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3407d5b9026aSNeilBrown } else { 3408d5b9026aSNeilBrown deny->ld_sop = NULL; 3409d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3410d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 34111da177e4SLinus Torvalds } 34121da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 341387df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 341487df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 34151da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 34161da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 34171da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 34181da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 34191da177e4SLinus Torvalds } 34201da177e4SLinus Torvalds 34211da177e4SLinus Torvalds static struct nfs4_stateowner * 34221da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 34231da177e4SLinus Torvalds struct xdr_netobj *owner) 34241da177e4SLinus Torvalds { 34251da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 34261da177e4SLinus Torvalds struct nfs4_stateowner *op; 34271da177e4SLinus Torvalds 34281da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3429599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 34301da177e4SLinus Torvalds return op; 34311da177e4SLinus Torvalds } 34321da177e4SLinus Torvalds return NULL; 34331da177e4SLinus Torvalds } 34341da177e4SLinus Torvalds 34351da177e4SLinus Torvalds /* 34361da177e4SLinus Torvalds * Alloc a lock owner structure. 34371da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 34381da177e4SLinus Torvalds * occured. 34391da177e4SLinus Torvalds * 34401da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 34411da177e4SLinus Torvalds */ 34421da177e4SLinus Torvalds 34431da177e4SLinus Torvalds static struct nfs4_stateowner * 34441da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 34451da177e4SLinus Torvalds struct nfs4_stateowner *sop; 34461da177e4SLinus Torvalds struct nfs4_replay *rp; 34471da177e4SLinus Torvalds unsigned int idhashval; 34481da177e4SLinus Torvalds 34491da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 34501da177e4SLinus Torvalds return NULL; 34511da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 34521da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 34531da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 34541da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3455ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3456ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 34571da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 34581da177e4SLinus Torvalds sop->so_time = 0; 34591da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 34601da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3461ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 34621da177e4SLinus Torvalds sop->so_is_open_owner = 0; 34631da177e4SLinus Torvalds sop->so_id = current_ownerid++; 34641da177e4SLinus Torvalds sop->so_client = clp; 3465b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3466b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3467b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 34681da177e4SLinus Torvalds sop->so_confirmed = 1; 34691da177e4SLinus Torvalds rp = &sop->so_replay; 3470de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 34711da177e4SLinus Torvalds rp->rp_buflen = 0; 34721da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 34731da177e4SLinus Torvalds return sop; 34741da177e4SLinus Torvalds } 34751da177e4SLinus Torvalds 3476fd39ca9aSNeilBrown static struct nfs4_stateid * 34771da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 34781da177e4SLinus Torvalds { 34791da177e4SLinus Torvalds struct nfs4_stateid *stp; 34801da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 34811da177e4SLinus Torvalds 34825ac049acSNeilBrown stp = nfs4_alloc_stateid(); 34835ac049acSNeilBrown if (stp == NULL) 34841da177e4SLinus Torvalds goto out; 34851da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 34861da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3487ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3488ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 34891da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 34908beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3491ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 34921da177e4SLinus Torvalds stp->st_stateowner = sop; 349313cd2184SNeilBrown get_nfs4_file(fp); 34941da177e4SLinus Torvalds stp->st_file = fp; 349578155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 34961da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 34971da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 34981da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 34991da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 35001da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 35011da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 35024c4cd222SNeilBrown stp->st_openstp = open_stp; 35031da177e4SLinus Torvalds 35041da177e4SLinus Torvalds out: 35051da177e4SLinus Torvalds return stp; 35061da177e4SLinus Torvalds } 35071da177e4SLinus Torvalds 3508fd39ca9aSNeilBrown static int 35091da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 35101da177e4SLinus Torvalds { 351187df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 35121da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 35131da177e4SLinus Torvalds } 35141da177e4SLinus Torvalds 35151da177e4SLinus Torvalds /* 35161da177e4SLinus Torvalds * LOCK operation 35171da177e4SLinus Torvalds */ 3518b37ad28bSAl Viro __be32 3519ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3520a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 35211da177e4SLinus Torvalds { 35223e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3523b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 35241da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 35251da177e4SLinus Torvalds struct file *filp; 35261da177e4SLinus Torvalds struct file_lock file_lock; 35278dc7c311SAndy Adamson struct file_lock conflock; 3528b37ad28bSAl Viro __be32 status = 0; 35291da177e4SLinus Torvalds unsigned int strhashval; 3530150b3934SMarc Eshel unsigned int cmd; 3531b8dd7b9aSAl Viro int err; 35321da177e4SLinus Torvalds 35331da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 35341da177e4SLinus Torvalds (long long) lock->lk_offset, 35351da177e4SLinus Torvalds (long long) lock->lk_length); 35361da177e4SLinus Torvalds 35371da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 35381da177e4SLinus Torvalds return nfserr_inval; 35391da177e4SLinus Torvalds 3540ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 35418837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3542a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3543a6f6ef2fSAndy Adamson return status; 3544a6f6ef2fSAndy Adamson } 3545a6f6ef2fSAndy Adamson 35461da177e4SLinus Torvalds nfs4_lock_state(); 35471da177e4SLinus Torvalds 35481da177e4SLinus Torvalds if (lock->lk_is_new) { 35491da177e4SLinus Torvalds /* 35501da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3551893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3552893f8770SNeilBrown * lock stateid. 35531da177e4SLinus Torvalds */ 35541da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 35551da177e4SLinus Torvalds struct nfs4_file *fp; 35561da177e4SLinus Torvalds 35571da177e4SLinus Torvalds status = nfserr_stale_clientid; 355860adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 355960adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 35601da177e4SLinus Torvalds goto out; 35611da177e4SLinus Torvalds 35621da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3563dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 35641da177e4SLinus Torvalds lock->lk_new_open_seqid, 35651da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3566f3362737SJ. Bruce Fields OPEN_STATE, 35673a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3568b59e3c0eSNeil Brown lock); 356937515177SNeilBrown if (status) 35701da177e4SLinus Torvalds goto out; 35713a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 35721da177e4SLinus Torvalds /* create lockowner and lock stateid */ 35731da177e4SLinus Torvalds fp = open_stp->st_file; 35741da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 35751da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 35761da177e4SLinus Torvalds &lock->v.new.owner); 35773e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 35783e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 35793e9e3dbeSNeilBrown * create new stateids)? */ 35801da177e4SLinus Torvalds status = nfserr_resource; 3581b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3582b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3583b59e3c0eSNeil Brown if (lock_sop == NULL) 35841da177e4SLinus Torvalds goto out; 3585b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 35868a280510SJ. Bruce Fields if (lock_stp == NULL) 35871da177e4SLinus Torvalds goto out; 35881da177e4SLinus Torvalds } else { 35891da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3590dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 35911da177e4SLinus Torvalds lock->lk_old_lock_seqid, 35921da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3593f3362737SJ. Bruce Fields LOCK_STATE, 35943a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 35951da177e4SLinus Torvalds if (status) 35961da177e4SLinus Torvalds goto out; 35973a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 35981da177e4SLinus Torvalds } 35993a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 36001da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 36011da177e4SLinus Torvalds 36020dd395dcSNeilBrown status = nfserr_grace; 3603af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 36040dd395dcSNeilBrown goto out; 36050dd395dcSNeilBrown status = nfserr_no_grace; 3606af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 36070dd395dcSNeilBrown goto out; 36080dd395dcSNeilBrown 36091da177e4SLinus Torvalds locks_init_lock(&file_lock); 36101da177e4SLinus Torvalds switch (lock->lk_type) { 36111da177e4SLinus Torvalds case NFS4_READ_LT: 36121da177e4SLinus Torvalds case NFS4_READW_LT: 36131da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3614150b3934SMarc Eshel cmd = F_SETLK; 36151da177e4SLinus Torvalds break; 36161da177e4SLinus Torvalds case NFS4_WRITE_LT: 36171da177e4SLinus Torvalds case NFS4_WRITEW_LT: 36181da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3619150b3934SMarc Eshel cmd = F_SETLK; 36201da177e4SLinus Torvalds break; 36211da177e4SLinus Torvalds default: 36221da177e4SLinus Torvalds status = nfserr_inval; 36231da177e4SLinus Torvalds goto out; 36241da177e4SLinus Torvalds } 3625b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 36261da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 36271da177e4SLinus Torvalds file_lock.fl_file = filp; 36281da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3629d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 36301da177e4SLinus Torvalds 36311da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 363287df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 36331da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 36341da177e4SLinus Torvalds 36351da177e4SLinus Torvalds /* 36361da177e4SLinus Torvalds * Try to lock the file in the VFS. 36371da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 36381da177e4SLinus Torvalds */ 36391da177e4SLinus Torvalds 3640fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3641b8dd7b9aSAl Viro switch (-err) { 36421da177e4SLinus Torvalds case 0: /* success! */ 36431da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 36441da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 36451da177e4SLinus Torvalds sizeof(stateid_t)); 3646b8dd7b9aSAl Viro status = 0; 3647eb76b3fdSAndy Adamson break; 3648eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3649eb76b3fdSAndy Adamson status = nfserr_denied; 3650eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3651eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3652eb76b3fdSAndy Adamson break; 36531da177e4SLinus Torvalds case (EDEADLK): 36541da177e4SLinus Torvalds status = nfserr_deadlock; 3655eb76b3fdSAndy Adamson break; 36561da177e4SLinus Torvalds default: 3657fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3658eb76b3fdSAndy Adamson status = nfserr_resource; 3659eb76b3fdSAndy Adamson break; 36601da177e4SLinus Torvalds } 36611da177e4SLinus Torvalds out: 36628a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3663f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 36643a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 36653a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3666a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3667f2327d9aSNeil Brown } 36681da177e4SLinus Torvalds nfs4_unlock_state(); 36691da177e4SLinus Torvalds return status; 36701da177e4SLinus Torvalds } 36711da177e4SLinus Torvalds 36721da177e4SLinus Torvalds /* 367355ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 367455ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 367555ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 367655ef1274SJ. Bruce Fields * inode operation.) 367755ef1274SJ. Bruce Fields */ 367855ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 367955ef1274SJ. Bruce Fields { 368055ef1274SJ. Bruce Fields struct file *file; 368155ef1274SJ. Bruce Fields int err; 368255ef1274SJ. Bruce Fields 368355ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 368455ef1274SJ. Bruce Fields if (err) 368555ef1274SJ. Bruce Fields return err; 368655ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 368755ef1274SJ. Bruce Fields nfsd_close(file); 368855ef1274SJ. Bruce Fields return err; 368955ef1274SJ. Bruce Fields } 369055ef1274SJ. Bruce Fields 369155ef1274SJ. Bruce Fields /* 36921da177e4SLinus Torvalds * LOCKT operation 36931da177e4SLinus Torvalds */ 3694b37ad28bSAl Viro __be32 3695ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3696ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 36971da177e4SLinus Torvalds { 36981da177e4SLinus Torvalds struct inode *inode; 36991da177e4SLinus Torvalds struct file_lock file_lock; 3700fd85b817SMarc Eshel int error; 3701b37ad28bSAl Viro __be32 status; 37021da177e4SLinus Torvalds 3703af558e33SJ. Bruce Fields if (locks_in_grace()) 37041da177e4SLinus Torvalds return nfserr_grace; 37051da177e4SLinus Torvalds 37061da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 37071da177e4SLinus Torvalds return nfserr_inval; 37081da177e4SLinus Torvalds 37091da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 37101da177e4SLinus Torvalds nfs4_lock_state(); 37111da177e4SLinus Torvalds 37121da177e4SLinus Torvalds status = nfserr_stale_clientid; 371360adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 37141da177e4SLinus Torvalds goto out; 37151da177e4SLinus Torvalds 3716ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3717849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 37181da177e4SLinus Torvalds if (status == nfserr_symlink) 37191da177e4SLinus Torvalds status = nfserr_inval; 37201da177e4SLinus Torvalds goto out; 37211da177e4SLinus Torvalds } 37221da177e4SLinus Torvalds 3723ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37241da177e4SLinus Torvalds locks_init_lock(&file_lock); 37251da177e4SLinus Torvalds switch (lockt->lt_type) { 37261da177e4SLinus Torvalds case NFS4_READ_LT: 37271da177e4SLinus Torvalds case NFS4_READW_LT: 37281da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 37291da177e4SLinus Torvalds break; 37301da177e4SLinus Torvalds case NFS4_WRITE_LT: 37311da177e4SLinus Torvalds case NFS4_WRITEW_LT: 37321da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 37331da177e4SLinus Torvalds break; 37341da177e4SLinus Torvalds default: 37352fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 37361da177e4SLinus Torvalds status = nfserr_inval; 37371da177e4SLinus Torvalds goto out; 37381da177e4SLinus Torvalds } 37391da177e4SLinus Torvalds 37401da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 37411da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 37421da177e4SLinus Torvalds if (lockt->lt_stateowner) 37431da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 37441da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37451da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 37461da177e4SLinus Torvalds 37471da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 374887df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 37491da177e4SLinus Torvalds 37501da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 37511da177e4SLinus Torvalds 37521da177e4SLinus Torvalds status = nfs_ok; 375355ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3754fd85b817SMarc Eshel if (error) { 3755fd85b817SMarc Eshel status = nfserrno(error); 3756fd85b817SMarc Eshel goto out; 3757fd85b817SMarc Eshel } 37589d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 37591da177e4SLinus Torvalds status = nfserr_denied; 37609d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 37611da177e4SLinus Torvalds } 37621da177e4SLinus Torvalds out: 37631da177e4SLinus Torvalds nfs4_unlock_state(); 37641da177e4SLinus Torvalds return status; 37651da177e4SLinus Torvalds } 37661da177e4SLinus Torvalds 3767b37ad28bSAl Viro __be32 3768ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3769a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 37701da177e4SLinus Torvalds { 37711da177e4SLinus Torvalds struct nfs4_stateid *stp; 37721da177e4SLinus Torvalds struct file *filp = NULL; 37731da177e4SLinus Torvalds struct file_lock file_lock; 3774b37ad28bSAl Viro __be32 status; 3775b8dd7b9aSAl Viro int err; 37761da177e4SLinus Torvalds 37771da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 37781da177e4SLinus Torvalds (long long) locku->lu_offset, 37791da177e4SLinus Torvalds (long long) locku->lu_length); 37801da177e4SLinus Torvalds 37811da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 37821da177e4SLinus Torvalds return nfserr_inval; 37831da177e4SLinus Torvalds 37841da177e4SLinus Torvalds nfs4_lock_state(); 37851da177e4SLinus Torvalds 3786dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 37871da177e4SLinus Torvalds locku->lu_seqid, 37881da177e4SLinus Torvalds &locku->lu_stateid, 3789f3362737SJ. Bruce Fields LOCK_STATE, 37901da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 37911da177e4SLinus Torvalds goto out; 37921da177e4SLinus Torvalds 37931da177e4SLinus Torvalds filp = stp->st_vfs_file; 37941da177e4SLinus Torvalds BUG_ON(!filp); 37951da177e4SLinus Torvalds locks_init_lock(&file_lock); 37961da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 37971da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 37981da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37991da177e4SLinus Torvalds file_lock.fl_file = filp; 38001da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3801d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 38021da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 38031da177e4SLinus Torvalds 380487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 38051da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 38061da177e4SLinus Torvalds 38071da177e4SLinus Torvalds /* 38081da177e4SLinus Torvalds * Try to unlock the file in the VFS. 38091da177e4SLinus Torvalds */ 3810fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3811b8dd7b9aSAl Viro if (err) { 3812fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 38131da177e4SLinus Torvalds goto out_nfserr; 38141da177e4SLinus Torvalds } 38151da177e4SLinus Torvalds /* 38161da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 38171da177e4SLinus Torvalds */ 38181da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 38191da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 38201da177e4SLinus Torvalds 38211da177e4SLinus Torvalds out: 3822f2327d9aSNeil Brown if (locku->lu_stateowner) { 38231da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3824a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3825f2327d9aSNeil Brown } 38261da177e4SLinus Torvalds nfs4_unlock_state(); 38271da177e4SLinus Torvalds return status; 38281da177e4SLinus Torvalds 38291da177e4SLinus Torvalds out_nfserr: 3830b8dd7b9aSAl Viro status = nfserrno(err); 38311da177e4SLinus Torvalds goto out; 38321da177e4SLinus Torvalds } 38331da177e4SLinus Torvalds 38341da177e4SLinus Torvalds /* 38351da177e4SLinus Torvalds * returns 38361da177e4SLinus Torvalds * 1: locks held by lockowner 38371da177e4SLinus Torvalds * 0: no locks held by lockowner 38381da177e4SLinus Torvalds */ 38391da177e4SLinus Torvalds static int 38401da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 38411da177e4SLinus Torvalds { 38421da177e4SLinus Torvalds struct file_lock **flpp; 38437eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 38441da177e4SLinus Torvalds int status = 0; 38451da177e4SLinus Torvalds 38461da177e4SLinus Torvalds lock_kernel(); 38471da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3848796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 38491da177e4SLinus Torvalds status = 1; 38501da177e4SLinus Torvalds goto out; 38511da177e4SLinus Torvalds } 3852796dadfdSJ. Bruce Fields } 38531da177e4SLinus Torvalds out: 38541da177e4SLinus Torvalds unlock_kernel(); 38551da177e4SLinus Torvalds return status; 38561da177e4SLinus Torvalds } 38571da177e4SLinus Torvalds 3858b37ad28bSAl Viro __be32 3859b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3860b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3861b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 38621da177e4SLinus Torvalds { 38631da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 38643e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 38653e9e3dbeSNeilBrown struct nfs4_stateid *stp; 38661da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 38673e9e3dbeSNeilBrown struct list_head matches; 38683e9e3dbeSNeilBrown int i; 3869b37ad28bSAl Viro __be32 status; 38701da177e4SLinus Torvalds 38711da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 38721da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 38731da177e4SLinus Torvalds 38741da177e4SLinus Torvalds /* XXX check for lease expiration */ 38751da177e4SLinus Torvalds 38761da177e4SLinus Torvalds status = nfserr_stale_clientid; 3877849823c5SNeil Brown if (STALE_CLIENTID(clid)) 38781da177e4SLinus Torvalds return status; 38791da177e4SLinus Torvalds 38801da177e4SLinus Torvalds nfs4_lock_state(); 38811da177e4SLinus Torvalds 38821da177e4SLinus Torvalds status = nfserr_locks_held; 38833e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 38843e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 38853e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 38863e9e3dbeSNeilBrown * data structures. */ 38873e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 38883e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 38893e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3890599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 38913e9e3dbeSNeilBrown continue; 38923e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3893ea1da636SNeilBrown st_perstateowner) { 38943e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 38951da177e4SLinus Torvalds goto out; 38963e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 38973e9e3dbeSNeilBrown * so it's OK to fool with here. */ 38983e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 38991da177e4SLinus Torvalds } 39003e9e3dbeSNeilBrown } 39013e9e3dbeSNeilBrown } 39023e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 39033e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 39043e9e3dbeSNeilBrown * have been checked. */ 39051da177e4SLinus Torvalds status = nfs_ok; 39060fa822e4SNeilBrown while (!list_empty(&matches)) { 39070fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 39080fa822e4SNeilBrown so_perclient); 39090fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 39100fa822e4SNeilBrown * for openowners. */ 39110fa822e4SNeilBrown list_del(&sop->so_perclient); 3912f044ff83SJ. Bruce Fields release_lockowner(sop); 39131da177e4SLinus Torvalds } 39141da177e4SLinus Torvalds out: 39151da177e4SLinus Torvalds nfs4_unlock_state(); 39161da177e4SLinus Torvalds return status; 39171da177e4SLinus Torvalds } 39181da177e4SLinus Torvalds 39191da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3920a55370a3SNeilBrown alloc_reclaim(void) 39211da177e4SLinus Torvalds { 3922a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 39231da177e4SLinus Torvalds } 39241da177e4SLinus Torvalds 3925c7b9a459SNeilBrown int 3926a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 3927c7b9a459SNeilBrown { 3928c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3929c7b9a459SNeilBrown struct nfs4_client *clp; 3930c7b9a459SNeilBrown 3931a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 3932c7b9a459SNeilBrown return clp ? 1 : 0; 3933c7b9a459SNeilBrown } 3934c7b9a459SNeilBrown 39351da177e4SLinus Torvalds /* 39361da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 39371da177e4SLinus Torvalds */ 3938190e4fbfSNeilBrown int 3939190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 39401da177e4SLinus Torvalds { 39411da177e4SLinus Torvalds unsigned int strhashval; 39421da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39431da177e4SLinus Torvalds 3944a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3945a55370a3SNeilBrown crp = alloc_reclaim(); 39461da177e4SLinus Torvalds if (!crp) 39471da177e4SLinus Torvalds return 0; 3948a55370a3SNeilBrown strhashval = clientstr_hashval(name); 39491da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 39501da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3951a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 39521da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 39531da177e4SLinus Torvalds return 1; 39541da177e4SLinus Torvalds } 39551da177e4SLinus Torvalds 39561da177e4SLinus Torvalds static void 39571da177e4SLinus Torvalds nfs4_release_reclaim(void) 39581da177e4SLinus Torvalds { 39591da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39601da177e4SLinus Torvalds int i; 39611da177e4SLinus Torvalds 39621da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 39631da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 39641da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 39651da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 39661da177e4SLinus Torvalds list_del(&crp->cr_strhash); 39671da177e4SLinus Torvalds kfree(crp); 39681da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 39691da177e4SLinus Torvalds } 39701da177e4SLinus Torvalds } 39711da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 39721da177e4SLinus Torvalds } 39731da177e4SLinus Torvalds 39741da177e4SLinus Torvalds /* 39751da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3976fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 39771da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 39781da177e4SLinus Torvalds { 39791da177e4SLinus Torvalds unsigned int strhashval; 39801da177e4SLinus Torvalds struct nfs4_client *clp; 39811da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39821da177e4SLinus Torvalds 39831da177e4SLinus Torvalds 39841da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 39851da177e4SLinus Torvalds clp = find_confirmed_client(clid); 39861da177e4SLinus Torvalds if (clp == NULL) 39871da177e4SLinus Torvalds return NULL; 39881da177e4SLinus Torvalds 3989a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3990a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3991a55370a3SNeilBrown clp->cl_recdir); 39921da177e4SLinus Torvalds 39931da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3994a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 39951da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3996a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 39971da177e4SLinus Torvalds return crp; 39981da177e4SLinus Torvalds } 39991da177e4SLinus Torvalds } 40001da177e4SLinus Torvalds return NULL; 40011da177e4SLinus Torvalds } 40021da177e4SLinus Torvalds 40031da177e4SLinus Torvalds /* 40041da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 40051da177e4SLinus Torvalds */ 4006b37ad28bSAl Viro __be32 40071da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 40081da177e4SLinus Torvalds { 4009dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 40101da177e4SLinus Torvalds } 40111da177e4SLinus Torvalds 4012ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 40131da177e4SLinus Torvalds 4014e8ff2a84SJ. Bruce Fields int 4015ac4d8ff2SNeilBrown nfs4_state_init(void) 40161da177e4SLinus Torvalds { 4017e8ff2a84SJ. Bruce Fields int i, status; 40181da177e4SLinus Torvalds 4019e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4020e8ff2a84SJ. Bruce Fields if (status) 4021e8ff2a84SJ. Bruce Fields return status; 40221da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 40231da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 40241da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 40251da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 40261da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 40271da177e4SLinus Torvalds } 40285282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 40295282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 40301da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 40311da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 40321da177e4SLinus Torvalds } 40331da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 40341da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 40351da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 40361da177e4SLinus Torvalds } 40371da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 40381da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 40391da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 40401da177e4SLinus Torvalds } 40411da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 40421da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 40431da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 40441da177e4SLinus Torvalds } 40451da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 40461da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 40471da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 40481da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4049ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 4050ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 4051ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4052e8ff2a84SJ. Bruce Fields return 0; 4053ac4d8ff2SNeilBrown } 4054ac4d8ff2SNeilBrown 4055190e4fbfSNeilBrown static void 4056190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4057190e4fbfSNeilBrown { 4058190e4fbfSNeilBrown int status; 4059190e4fbfSNeilBrown 40600964a3d3SNeilBrown nfs4_lock_state(); 40610964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 4062190e4fbfSNeilBrown status = nfsd4_recdir_load(); 40630964a3d3SNeilBrown nfs4_unlock_state(); 4064190e4fbfSNeilBrown if (status) 4065190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4066190e4fbfSNeilBrown } 4067190e4fbfSNeilBrown 40689a8db97eSMarc Eshel unsigned long 40699a8db97eSMarc Eshel get_nfs4_grace_period(void) 40709a8db97eSMarc Eshel { 40719a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 40729a8db97eSMarc Eshel } 40739a8db97eSMarc Eshel 4074c2f1a551SMeelap Shah /* 4075c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4076c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4077c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4078c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4079c2f1a551SMeelap Shah * 4080c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4081c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4082c2f1a551SMeelap Shah */ 4083c2f1a551SMeelap Shah static void 4084c2f1a551SMeelap Shah set_max_delegations(void) 4085c2f1a551SMeelap Shah { 4086c2f1a551SMeelap Shah /* 4087c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4088c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4089c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4090c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4091c2f1a551SMeelap Shah */ 4092c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4093c2f1a551SMeelap Shah } 4094c2f1a551SMeelap Shah 4095ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4096ac4d8ff2SNeilBrown 4097ac4d8ff2SNeilBrown static void 4098ac4d8ff2SNeilBrown __nfs4_state_start(void) 4099ac4d8ff2SNeilBrown { 41009a8db97eSMarc Eshel unsigned long grace_time; 4101ac4d8ff2SNeilBrown 41021da177e4SLinus Torvalds boot_time = get_seconds(); 4103af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 4104d99a05adSNeilBrown lease_time = user_lease_time; 4105af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 41069a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 41079a8db97eSMarc Eshel grace_time/HZ); 410858da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 41099a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 4110c2f1a551SMeelap Shah set_max_delegations(); 41111da177e4SLinus Torvalds } 41121da177e4SLinus Torvalds 4113e8ff2a84SJ. Bruce Fields void 411476a3550eSNeilBrown nfs4_state_start(void) 41151da177e4SLinus Torvalds { 41161da177e4SLinus Torvalds if (nfs4_init) 4117e8ff2a84SJ. Bruce Fields return; 4118190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 411976a3550eSNeilBrown __nfs4_state_start(); 41201da177e4SLinus Torvalds nfs4_init = 1; 4121e8ff2a84SJ. Bruce Fields return; 41221da177e4SLinus Torvalds } 41231da177e4SLinus Torvalds 41241da177e4SLinus Torvalds time_t 41251da177e4SLinus Torvalds nfs4_lease_time(void) 41261da177e4SLinus Torvalds { 41271da177e4SLinus Torvalds return lease_time; 41281da177e4SLinus Torvalds } 41291da177e4SLinus Torvalds 41301da177e4SLinus Torvalds static void 41311da177e4SLinus Torvalds __nfs4_state_shutdown(void) 41321da177e4SLinus Torvalds { 41331da177e4SLinus Torvalds int i; 41341da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 41351da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 41361da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 41371da177e4SLinus Torvalds 41381da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 41391da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 41401da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 41411da177e4SLinus Torvalds expire_client(clp); 41421da177e4SLinus Torvalds } 41431da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 41441da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 41451da177e4SLinus Torvalds expire_client(clp); 41461da177e4SLinus Torvalds } 41471da177e4SLinus Torvalds } 41481da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 41491da177e4SLinus Torvalds spin_lock(&recall_lock); 41501da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 41511da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 41521da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 41531da177e4SLinus Torvalds } 41541da177e4SLinus Torvalds spin_unlock(&recall_lock); 41551da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 41561da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 41571da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 41581da177e4SLinus Torvalds unhash_delegation(dp); 41591da177e4SLinus Torvalds } 41601da177e4SLinus Torvalds 4161190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 41621da177e4SLinus Torvalds nfs4_init = 0; 41631da177e4SLinus Torvalds } 41641da177e4SLinus Torvalds 41651da177e4SLinus Torvalds void 41661da177e4SLinus Torvalds nfs4_state_shutdown(void) 41671da177e4SLinus Torvalds { 41685e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 41695e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 41702c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 41711da177e4SLinus Torvalds nfs4_lock_state(); 41721da177e4SLinus Torvalds nfs4_release_reclaim(); 41731da177e4SLinus Torvalds __nfs4_state_shutdown(); 41741da177e4SLinus Torvalds nfs4_unlock_state(); 41751da177e4SLinus Torvalds } 41761da177e4SLinus Torvalds 41773dd98a3bSJeff Layton /* 41783dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 41793dd98a3bSJeff Layton * accessed when nfsd is starting. 41803dd98a3bSJeff Layton */ 41810964a3d3SNeilBrown static void 41820964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 41830964a3d3SNeilBrown { 41840964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 41850964a3d3SNeilBrown } 41860964a3d3SNeilBrown 41870964a3d3SNeilBrown /* 41880964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 41890964a3d3SNeilBrown */ 41900964a3d3SNeilBrown int 41910964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 41920964a3d3SNeilBrown { 41930964a3d3SNeilBrown int status; 4194a63bb996SAl Viro struct path path; 41950964a3d3SNeilBrown 4196a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 41970964a3d3SNeilBrown if (status) 41980964a3d3SNeilBrown return status; 41990964a3d3SNeilBrown status = -ENOTDIR; 4200a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 42010964a3d3SNeilBrown nfs4_set_recdir(recdir); 42020964a3d3SNeilBrown status = 0; 42030964a3d3SNeilBrown } 4204a63bb996SAl Viro path_put(&path); 42050964a3d3SNeilBrown return status; 42060964a3d3SNeilBrown } 42070964a3d3SNeilBrown 42083dd98a3bSJeff Layton char * 42093dd98a3bSJeff Layton nfs4_recoverydir(void) 42103dd98a3bSJeff Layton { 42113dd98a3bSJeff Layton return user_recovery_dirname; 42123dd98a3bSJeff Layton } 42133dd98a3bSJeff Layton 42141da177e4SLinus Torvalds /* 42151da177e4SLinus Torvalds * Called when leasetime is changed. 42161da177e4SLinus Torvalds * 4217d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 4218d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 4219d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 4220d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 4221d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 42223dd98a3bSJeff Layton * 42233dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 42243dd98a3bSJeff Layton * when nfsd is starting 42251da177e4SLinus Torvalds */ 42261da177e4SLinus Torvalds void 42271da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 42281da177e4SLinus Torvalds { 4229d99a05adSNeilBrown user_lease_time = leasetime; 42301da177e4SLinus Torvalds } 4231