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 } 6463cef9ab2SJ. Bruce Fields if (clp->cl_callback.cb_cred) { 6473cef9ab2SJ. Bruce Fields put_rpccred(clp->cl_callback.cb_cred); 6483cef9ab2SJ. Bruce Fields clp->cl_callback.cb_cred = NULL; 6493cef9ab2SJ. Bruce Fields } 6501b1a9b31SJ. Bruce Fields } 6511b1a9b31SJ. Bruce Fields 6521da177e4SLinus Torvalds static inline void 6531da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 6541da177e4SLinus Torvalds { 6551b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 65638eb76a5SAndy Adamson nfsd4_release_respages(clp->cl_slot.sl_cache_entry.ce_respages, 65738eb76a5SAndy Adamson clp->cl_slot.sl_cache_entry.ce_resused); 6581da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 6591da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 66068e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 6611da177e4SLinus Torvalds kfree(clp->cl_name.data); 6621da177e4SLinus Torvalds kfree(clp); 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 6651da177e4SLinus Torvalds void 6661da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 6671da177e4SLinus Torvalds { 6681da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 6691da177e4SLinus Torvalds free_client(clp); 6701da177e4SLinus Torvalds } 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds static void 6731da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 6741da177e4SLinus Torvalds { 6751da177e4SLinus Torvalds struct nfs4_stateowner *sop; 6761da177e4SLinus Torvalds struct nfs4_delegation *dp; 6771da177e4SLinus Torvalds struct list_head reaplist; 6781da177e4SLinus Torvalds 6791da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 6801da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 6831da177e4SLinus Torvalds spin_lock(&recall_lock); 684ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 685ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 6861da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 6871da177e4SLinus Torvalds dp->dl_flock); 688ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 6891da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 6901da177e4SLinus Torvalds } 6911da177e4SLinus Torvalds spin_unlock(&recall_lock); 6921da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 6931da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 6941da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 6951da177e4SLinus Torvalds unhash_delegation(dp); 6961da177e4SLinus Torvalds } 6971da177e4SLinus Torvalds list_del(&clp->cl_idhash); 6981da177e4SLinus Torvalds list_del(&clp->cl_strhash); 6991da177e4SLinus Torvalds list_del(&clp->cl_lru); 700ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 701ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 702f044ff83SJ. Bruce Fields release_openowner(sop); 7031da177e4SLinus Torvalds } 704c4bf7868SMarc Eshel while (!list_empty(&clp->cl_sessions)) { 705c4bf7868SMarc Eshel struct nfsd4_session *ses; 706c4bf7868SMarc Eshel ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, 707c4bf7868SMarc Eshel se_perclnt); 708c4bf7868SMarc Eshel release_session(ses); 709c4bf7868SMarc Eshel } 7101da177e4SLinus Torvalds put_nfs4_client(clp); 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds 71335bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 71435bba9a3SJ. Bruce Fields { 7151da177e4SLinus Torvalds struct nfs4_client *clp; 7161da177e4SLinus Torvalds 71735bba9a3SJ. Bruce Fields clp = alloc_client(name); 71835bba9a3SJ. Bruce Fields if (clp == NULL) 71935bba9a3SJ. Bruce Fields return NULL; 720a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 7211da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 7221da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 7231da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 7241da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 725ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 726ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 7279fb87070SMarc Eshel INIT_LIST_HEAD(&clp->cl_sessions); 7281da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 7291da177e4SLinus Torvalds return clp; 7301da177e4SLinus Torvalds } 7311da177e4SLinus Torvalds 73235bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 73335bba9a3SJ. Bruce Fields { 73435bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 73535bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 7361da177e4SLinus Torvalds } 7371da177e4SLinus Torvalds 73835bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 73935bba9a3SJ. Bruce Fields { 7401da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 7411da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 7421da177e4SLinus Torvalds } 7431da177e4SLinus Torvalds 74435bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 74535bba9a3SJ. Bruce Fields { 7461da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 7471da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 7481da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 7491da177e4SLinus Torvalds get_group_info(target->cr_group_info); 7501da177e4SLinus Torvalds } 7511da177e4SLinus Torvalds 75235bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 753599e0a22SJ. Bruce Fields { 754a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 7551da177e4SLinus Torvalds } 7561da177e4SLinus Torvalds 7571da177e4SLinus Torvalds static int 758599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 759599e0a22SJ. Bruce Fields { 760599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds 7631da177e4SLinus Torvalds static int 764599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 765599e0a22SJ. Bruce Fields { 766599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 7671da177e4SLinus Torvalds } 7681da177e4SLinus Torvalds 7691da177e4SLinus Torvalds /* XXX what about NGROUP */ 7701da177e4SLinus Torvalds static int 771599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 772599e0a22SJ. Bruce Fields { 773599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 7741da177e4SLinus Torvalds } 7751da177e4SLinus Torvalds 7765ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 7775ec7b46cSJ. Bruce Fields { 7785ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 7795ec7b46cSJ. Bruce Fields 7801da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 7811da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 7821da177e4SLinus Torvalds } 7831da177e4SLinus Torvalds 784deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 785deda2faaSJ. Bruce Fields { 786deda2faaSJ. Bruce Fields static u32 i; 7871da177e4SLinus Torvalds u32 *p; 7881da177e4SLinus Torvalds 7891da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 790deda2faaSJ. Bruce Fields *p++ = get_seconds(); 791deda2faaSJ. Bruce Fields *p++ = i++; 7921da177e4SLinus Torvalds } 7931da177e4SLinus Torvalds 79435bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 79535bba9a3SJ. Bruce Fields { 7961da177e4SLinus Torvalds if (name.len == 0) 7971da177e4SLinus Torvalds return 0; 7981da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 7992fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 8001da177e4SLinus Torvalds return 0; 8011da177e4SLinus Torvalds } 8021da177e4SLinus Torvalds return 1; 8031da177e4SLinus Torvalds } 8041da177e4SLinus Torvalds 805fd39ca9aSNeilBrown static void 8061da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 8071da177e4SLinus Torvalds { 8081da177e4SLinus Torvalds unsigned int idhashval; 8091da177e4SLinus Torvalds 8101da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 8111da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8121da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 8131da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 8141da177e4SLinus Torvalds clp->cl_time = get_seconds(); 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds 817fd39ca9aSNeilBrown static void 8181da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 8191da177e4SLinus Torvalds { 8201da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 8211da177e4SLinus Torvalds unsigned int strhashval; 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 8241da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 825f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 826a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 8271da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 8281da177e4SLinus Torvalds renew_client(clp); 8291da177e4SLinus Torvalds } 8301da177e4SLinus Torvalds 8311da177e4SLinus Torvalds static struct nfs4_client * 8321da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 8331da177e4SLinus Torvalds { 8341da177e4SLinus Torvalds struct nfs4_client *clp; 8351da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8361da177e4SLinus Torvalds 8371da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 838599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8391da177e4SLinus Torvalds return clp; 8401da177e4SLinus Torvalds } 8411da177e4SLinus Torvalds return NULL; 8421da177e4SLinus Torvalds } 8431da177e4SLinus Torvalds 8441da177e4SLinus Torvalds static struct nfs4_client * 8451da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 8461da177e4SLinus Torvalds { 8471da177e4SLinus Torvalds struct nfs4_client *clp; 8481da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 8491da177e4SLinus Torvalds 8501da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 851599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 8521da177e4SLinus Torvalds return clp; 8531da177e4SLinus Torvalds } 8541da177e4SLinus Torvalds return NULL; 8551da177e4SLinus Torvalds } 8561da177e4SLinus Torvalds 857a1bcecd2SAndy Adamson /* 858a1bcecd2SAndy Adamson * Return 1 iff clp's clientid establishment method matches the use_exchange_id 859a1bcecd2SAndy Adamson * parameter. Matching is based on the fact the at least one of the 860a1bcecd2SAndy Adamson * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 861a1bcecd2SAndy Adamson * 862a1bcecd2SAndy Adamson * FIXME: we need to unify the clientid namespaces for nfsv4.x 863a1bcecd2SAndy Adamson * and correctly deal with client upgrade/downgrade in EXCHANGE_ID 864a1bcecd2SAndy Adamson * and SET_CLIENTID{,_CONFIRM} 865a1bcecd2SAndy Adamson */ 866a1bcecd2SAndy Adamson static inline int 867a1bcecd2SAndy Adamson match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) 868a1bcecd2SAndy Adamson { 869a1bcecd2SAndy Adamson bool has_exchange_flags = (clp->cl_exchange_flags != 0); 870a1bcecd2SAndy Adamson return use_exchange_id == has_exchange_flags; 871a1bcecd2SAndy Adamson } 872a1bcecd2SAndy Adamson 87328ce6054SNeilBrown static struct nfs4_client * 874a1bcecd2SAndy Adamson find_confirmed_client_by_str(const char *dname, unsigned int hashval, 875a1bcecd2SAndy Adamson bool use_exchange_id) 87628ce6054SNeilBrown { 87728ce6054SNeilBrown struct nfs4_client *clp; 87828ce6054SNeilBrown 87928ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 880a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 881a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 88228ce6054SNeilBrown return clp; 88328ce6054SNeilBrown } 88428ce6054SNeilBrown return NULL; 88528ce6054SNeilBrown } 88628ce6054SNeilBrown 88728ce6054SNeilBrown static struct nfs4_client * 888a1bcecd2SAndy Adamson find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, 889a1bcecd2SAndy Adamson bool use_exchange_id) 89028ce6054SNeilBrown { 89128ce6054SNeilBrown struct nfs4_client *clp; 89228ce6054SNeilBrown 89328ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 894a1bcecd2SAndy Adamson if (same_name(clp->cl_recdir, dname) && 895a1bcecd2SAndy Adamson match_clientid_establishment(clp, use_exchange_id)) 89628ce6054SNeilBrown return clp; 89728ce6054SNeilBrown } 89828ce6054SNeilBrown return NULL; 89928ce6054SNeilBrown } 90028ce6054SNeilBrown 9011da177e4SLinus Torvalds /* a helper function for parse_callback */ 9021da177e4SLinus Torvalds static int 9031da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 9041da177e4SLinus Torvalds { 9051da177e4SLinus Torvalds unsigned int len = *lenp; 9061da177e4SLinus Torvalds char *p = *addrp; 9071da177e4SLinus Torvalds int n = -1; 9081da177e4SLinus Torvalds char c; 9091da177e4SLinus Torvalds 9101da177e4SLinus Torvalds for (;;) { 9111da177e4SLinus Torvalds if (!len) 9121da177e4SLinus Torvalds break; 9131da177e4SLinus Torvalds len--; 9141da177e4SLinus Torvalds c = *p++; 9151da177e4SLinus Torvalds if (c == '.') 9161da177e4SLinus Torvalds break; 9171da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 9181da177e4SLinus Torvalds n = -1; 9191da177e4SLinus Torvalds break; 9201da177e4SLinus Torvalds } 9211da177e4SLinus Torvalds if (n < 0) 9221da177e4SLinus Torvalds n = 0; 9231da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 9241da177e4SLinus Torvalds if (n > 255) { 9251da177e4SLinus Torvalds n = -1; 9261da177e4SLinus Torvalds break; 9271da177e4SLinus Torvalds } 9281da177e4SLinus Torvalds } 9291da177e4SLinus Torvalds *lenp = len; 9301da177e4SLinus Torvalds *addrp = p; 9311da177e4SLinus Torvalds return n; 9321da177e4SLinus Torvalds } 9331da177e4SLinus Torvalds 9341da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 935fd39ca9aSNeilBrown static int 9361da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 9371da177e4SLinus Torvalds { 9381da177e4SLinus Torvalds int temp = 0; 9391da177e4SLinus Torvalds u32 cbaddr = 0; 9401da177e4SLinus Torvalds u16 cbport = 0; 9411da177e4SLinus Torvalds u32 addrlen = addr_len; 9421da177e4SLinus Torvalds char *addr = addr_val; 9431da177e4SLinus Torvalds int i, shift; 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds /* ipaddress */ 9461da177e4SLinus Torvalds shift = 24; 9471da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 9481da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 9491da177e4SLinus Torvalds return 0; 9501da177e4SLinus Torvalds } 9511da177e4SLinus Torvalds cbaddr |= (temp << shift); 9521da177e4SLinus Torvalds if (shift > 0) 9531da177e4SLinus Torvalds shift -= 8; 9541da177e4SLinus Torvalds } 9551da177e4SLinus Torvalds *cbaddrp = cbaddr; 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds /* port */ 9581da177e4SLinus Torvalds shift = 8; 9591da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 9601da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 9611da177e4SLinus Torvalds return 0; 9621da177e4SLinus Torvalds } 9631da177e4SLinus Torvalds cbport |= (temp << shift); 9641da177e4SLinus Torvalds if (shift > 0) 9651da177e4SLinus Torvalds shift -= 8; 9661da177e4SLinus Torvalds } 9671da177e4SLinus Torvalds *cbportp = cbport; 9681da177e4SLinus Torvalds return 1; 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 971fd39ca9aSNeilBrown static void 9721da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 9731da177e4SLinus Torvalds { 9741da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 9751da177e4SLinus Torvalds 9761da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 9771da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 9781da177e4SLinus Torvalds goto out_err; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 9811da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 9821da177e4SLinus Torvalds goto out_err; 9831da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 9841da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 9851da177e4SLinus Torvalds return; 9861da177e4SLinus Torvalds out_err: 987849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 9881da177e4SLinus Torvalds "will not receive delegations\n", 9891da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds return; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 994074fe897SAndy Adamson void 995074fe897SAndy Adamson nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp) 996074fe897SAndy Adamson { 997074fe897SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 998074fe897SAndy Adamson 999074fe897SAndy Adamson resp->cstate.statp = statp; 1000074fe897SAndy Adamson } 1001074fe897SAndy Adamson 1002074fe897SAndy Adamson /* 1003074fe897SAndy Adamson * Dereference the result pages. 1004074fe897SAndy Adamson */ 1005074fe897SAndy Adamson static void 1006074fe897SAndy Adamson nfsd4_release_respages(struct page **respages, short resused) 1007074fe897SAndy Adamson { 1008074fe897SAndy Adamson int i; 1009074fe897SAndy Adamson 1010074fe897SAndy Adamson dprintk("--> %s\n", __func__); 1011074fe897SAndy Adamson for (i = 0; i < resused; i++) { 1012074fe897SAndy Adamson if (!respages[i]) 1013074fe897SAndy Adamson continue; 1014074fe897SAndy Adamson put_page(respages[i]); 1015074fe897SAndy Adamson respages[i] = NULL; 1016074fe897SAndy Adamson } 1017074fe897SAndy Adamson } 1018074fe897SAndy Adamson 1019074fe897SAndy Adamson static void 1020074fe897SAndy Adamson nfsd4_copy_pages(struct page **topages, struct page **frompages, short count) 1021074fe897SAndy Adamson { 1022074fe897SAndy Adamson int i; 1023074fe897SAndy Adamson 1024074fe897SAndy Adamson for (i = 0; i < count; i++) { 1025074fe897SAndy Adamson topages[i] = frompages[i]; 1026074fe897SAndy Adamson if (!topages[i]) 1027074fe897SAndy Adamson continue; 1028074fe897SAndy Adamson get_page(topages[i]); 1029074fe897SAndy Adamson } 1030074fe897SAndy Adamson } 1031074fe897SAndy Adamson 1032074fe897SAndy Adamson /* 1033074fe897SAndy Adamson * Cache the reply pages up to NFSD_PAGES_PER_SLOT + 1, clearing the previous 1034074fe897SAndy Adamson * pages. We add a page to NFSD_PAGES_PER_SLOT for the case where the total 1035074fe897SAndy Adamson * length of the XDR response is less than se_fmaxresp_cached 1036074fe897SAndy Adamson * (NFSD_PAGES_PER_SLOT * PAGE_SIZE) but the xdr_buf pages is used for a 1037074fe897SAndy Adamson * of the reply (e.g. readdir). 1038074fe897SAndy Adamson * 1039074fe897SAndy Adamson * Store the base and length of the rq_req.head[0] page 1040074fe897SAndy Adamson * of the NFSv4.1 data, just past the rpc header. 1041074fe897SAndy Adamson */ 1042074fe897SAndy Adamson void 1043074fe897SAndy Adamson nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) 1044074fe897SAndy Adamson { 1045074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 1046074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 1047074fe897SAndy Adamson struct nfsd4_compoundargs *args = rqstp->rq_argp; 1048074fe897SAndy Adamson struct nfsd4_op *op = &args->ops[resp->opcnt]; 1049074fe897SAndy Adamson struct kvec *resv = &rqstp->rq_res.head[0]; 1050074fe897SAndy Adamson 1051074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 1052074fe897SAndy Adamson 1053074fe897SAndy Adamson /* Don't cache a failed OP_SEQUENCE. */ 1054074fe897SAndy Adamson if (resp->opcnt == 1 && op->opnum == OP_SEQUENCE && resp->cstate.status) 1055074fe897SAndy Adamson return; 1056bf864a31SAndy Adamson 1057074fe897SAndy Adamson nfsd4_release_respages(entry->ce_respages, entry->ce_resused); 1058bf864a31SAndy Adamson entry->ce_opcnt = resp->opcnt; 1059bf864a31SAndy Adamson entry->ce_status = resp->cstate.status; 1060bf864a31SAndy Adamson 1061bf864a31SAndy Adamson /* 1062bf864a31SAndy Adamson * Don't need a page to cache just the sequence operation - the slot 1063bf864a31SAndy Adamson * does this for us! 1064bf864a31SAndy Adamson */ 1065bf864a31SAndy Adamson 1066bf864a31SAndy Adamson if (nfsd4_not_cached(resp)) { 1067bf864a31SAndy Adamson entry->ce_resused = 0; 1068bf864a31SAndy Adamson entry->ce_rpchdrlen = 0; 1069bf864a31SAndy Adamson dprintk("%s Just cache SEQUENCE. ce_cachethis %d\n", __func__, 1070bf864a31SAndy Adamson resp->cstate.slot->sl_cache_entry.ce_cachethis); 1071bf864a31SAndy Adamson return; 1072bf864a31SAndy Adamson } 1073074fe897SAndy Adamson entry->ce_resused = rqstp->rq_resused; 1074074fe897SAndy Adamson if (entry->ce_resused > NFSD_PAGES_PER_SLOT + 1) 1075074fe897SAndy Adamson entry->ce_resused = NFSD_PAGES_PER_SLOT + 1; 1076074fe897SAndy Adamson nfsd4_copy_pages(entry->ce_respages, rqstp->rq_respages, 1077074fe897SAndy Adamson entry->ce_resused); 1078074fe897SAndy Adamson entry->ce_datav.iov_base = resp->cstate.statp; 1079074fe897SAndy Adamson entry->ce_datav.iov_len = resv->iov_len - ((char *)resp->cstate.statp - 1080074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0])); 1081074fe897SAndy Adamson /* Current request rpc header length*/ 1082074fe897SAndy Adamson entry->ce_rpchdrlen = (char *)resp->cstate.statp - 1083074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 1084074fe897SAndy Adamson } 1085074fe897SAndy Adamson 1086074fe897SAndy Adamson /* 1087074fe897SAndy Adamson * We keep the rpc header, but take the nfs reply from the replycache. 1088074fe897SAndy Adamson */ 1089074fe897SAndy Adamson static int 1090074fe897SAndy Adamson nfsd41_copy_replay_data(struct nfsd4_compoundres *resp, 1091074fe897SAndy Adamson struct nfsd4_cache_entry *entry) 1092074fe897SAndy Adamson { 1093074fe897SAndy Adamson struct svc_rqst *rqstp = resp->rqstp; 1094074fe897SAndy Adamson struct kvec *resv = &resp->rqstp->rq_res.head[0]; 1095074fe897SAndy Adamson int len; 1096074fe897SAndy Adamson 1097074fe897SAndy Adamson /* Current request rpc header length*/ 1098074fe897SAndy Adamson len = (char *)resp->cstate.statp - 1099074fe897SAndy Adamson (char *)page_address(rqstp->rq_respages[0]); 1100074fe897SAndy Adamson if (entry->ce_datav.iov_len + len > PAGE_SIZE) { 1101074fe897SAndy Adamson dprintk("%s v41 cached reply too large (%Zd).\n", __func__, 1102074fe897SAndy Adamson entry->ce_datav.iov_len); 1103074fe897SAndy Adamson return 0; 1104074fe897SAndy Adamson } 1105074fe897SAndy Adamson /* copy the cached reply nfsd data past the current rpc header */ 1106074fe897SAndy Adamson memcpy((char *)resv->iov_base + len, entry->ce_datav.iov_base, 1107074fe897SAndy Adamson entry->ce_datav.iov_len); 1108074fe897SAndy Adamson resv->iov_len = len + entry->ce_datav.iov_len; 1109074fe897SAndy Adamson return 1; 1110074fe897SAndy Adamson } 1111074fe897SAndy Adamson 1112074fe897SAndy Adamson /* 1113074fe897SAndy Adamson * Keep the first page of the replay. Copy the NFSv4.1 data from the first 1114074fe897SAndy Adamson * cached page. Replace any futher replay pages from the cache. 1115074fe897SAndy Adamson */ 1116074fe897SAndy Adamson __be32 1117bf864a31SAndy Adamson nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, 1118bf864a31SAndy Adamson struct nfsd4_sequence *seq) 1119074fe897SAndy Adamson { 1120074fe897SAndy Adamson struct nfsd4_cache_entry *entry = &resp->cstate.slot->sl_cache_entry; 1121074fe897SAndy Adamson __be32 status; 1122074fe897SAndy Adamson 1123074fe897SAndy Adamson dprintk("--> %s entry %p\n", __func__, entry); 1124074fe897SAndy Adamson 1125bf864a31SAndy Adamson /* 1126bf864a31SAndy Adamson * If this is just the sequence operation, we did not keep 1127bf864a31SAndy Adamson * a page in the cache entry because we can just use the 1128bf864a31SAndy Adamson * slot info stored in struct nfsd4_sequence that was checked 1129bf864a31SAndy Adamson * against the slot in nfsd4_sequence(). 1130bf864a31SAndy Adamson * 1131bf864a31SAndy Adamson * This occurs when seq->cachethis is FALSE, or when the client 1132bf864a31SAndy Adamson * session inactivity timer fires and a solo sequence operation 1133bf864a31SAndy Adamson * is sent (lease renewal). 1134bf864a31SAndy Adamson */ 1135bf864a31SAndy Adamson if (seq && nfsd4_not_cached(resp)) { 1136bf864a31SAndy Adamson seq->maxslots = resp->cstate.session->se_fnumslots; 1137bf864a31SAndy Adamson return nfs_ok; 1138bf864a31SAndy Adamson } 1139074fe897SAndy Adamson 1140074fe897SAndy Adamson if (!nfsd41_copy_replay_data(resp, entry)) { 1141074fe897SAndy Adamson /* 1142074fe897SAndy Adamson * Not enough room to use the replay rpc header, send the 1143074fe897SAndy Adamson * cached header. Release all the allocated result pages. 1144074fe897SAndy Adamson */ 1145074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 1146074fe897SAndy Adamson nfsd4_copy_pages(resp->rqstp->rq_respages, entry->ce_respages, 1147074fe897SAndy Adamson entry->ce_resused); 1148074fe897SAndy Adamson } else { 1149074fe897SAndy Adamson /* Release all but the first allocated result page */ 1150074fe897SAndy Adamson 1151074fe897SAndy Adamson resp->rqstp->rq_resused--; 1152074fe897SAndy Adamson svc_free_res_pages(resp->rqstp); 1153074fe897SAndy Adamson 1154074fe897SAndy Adamson nfsd4_copy_pages(&resp->rqstp->rq_respages[1], 1155074fe897SAndy Adamson &entry->ce_respages[1], 1156074fe897SAndy Adamson entry->ce_resused - 1); 1157074fe897SAndy Adamson } 1158074fe897SAndy Adamson 1159074fe897SAndy Adamson resp->rqstp->rq_resused = entry->ce_resused; 1160da3846a2SAndy Adamson resp->opcnt = entry->ce_opcnt; 1161da3846a2SAndy Adamson resp->cstate.iovlen = entry->ce_datav.iov_len + entry->ce_rpchdrlen; 1162074fe897SAndy Adamson status = entry->ce_status; 1163074fe897SAndy Adamson 1164074fe897SAndy Adamson return status; 1165074fe897SAndy Adamson } 1166074fe897SAndy Adamson 11670733d213SAndy Adamson /* 11680733d213SAndy Adamson * Set the exchange_id flags returned by the server. 11690733d213SAndy Adamson */ 11700733d213SAndy Adamson static void 11710733d213SAndy Adamson nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) 11720733d213SAndy Adamson { 11730733d213SAndy Adamson /* pNFS is not supported */ 11740733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; 11750733d213SAndy Adamson 11760733d213SAndy Adamson /* Referrals are supported, Migration is not. */ 11770733d213SAndy Adamson new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; 11780733d213SAndy Adamson 11790733d213SAndy Adamson /* set the wire flags to return to client. */ 11800733d213SAndy Adamson clid->flags = new->cl_exchange_flags; 11810733d213SAndy Adamson } 11820733d213SAndy Adamson 1183b37ad28bSAl Viro __be32 1184069b6ad4SAndy Adamson nfsd4_exchange_id(struct svc_rqst *rqstp, 1185069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1186069b6ad4SAndy Adamson struct nfsd4_exchange_id *exid) 1187069b6ad4SAndy Adamson { 11880733d213SAndy Adamson struct nfs4_client *unconf, *conf, *new; 11890733d213SAndy Adamson int status; 11900733d213SAndy Adamson unsigned int strhashval; 11910733d213SAndy Adamson char dname[HEXDIR_LEN]; 11920733d213SAndy Adamson nfs4_verifier verf = exid->verifier; 11930733d213SAndy Adamson u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; 11940733d213SAndy Adamson 11950733d213SAndy Adamson dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " 11960733d213SAndy Adamson " ip_addr=%u flags %x, spa_how %d\n", 11970733d213SAndy Adamson __func__, rqstp, exid, exid->clname.len, exid->clname.data, 11980733d213SAndy Adamson ip_addr, exid->flags, exid->spa_how); 11990733d213SAndy Adamson 12000733d213SAndy Adamson if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) 12010733d213SAndy Adamson return nfserr_inval; 12020733d213SAndy Adamson 12030733d213SAndy Adamson /* Currently only support SP4_NONE */ 12040733d213SAndy Adamson switch (exid->spa_how) { 12050733d213SAndy Adamson case SP4_NONE: 12060733d213SAndy Adamson break; 12070733d213SAndy Adamson case SP4_SSV: 12080733d213SAndy Adamson return nfserr_encr_alg_unsupp; 12090733d213SAndy Adamson default: 12100733d213SAndy Adamson BUG(); /* checked by xdr code */ 12110733d213SAndy Adamson case SP4_MACH_CRED: 12120733d213SAndy Adamson return nfserr_serverfault; /* no excuse :-/ */ 12130733d213SAndy Adamson } 12140733d213SAndy Adamson 12150733d213SAndy Adamson status = nfs4_make_rec_clidname(dname, &exid->clname); 12160733d213SAndy Adamson 12170733d213SAndy Adamson if (status) 12180733d213SAndy Adamson goto error; 12190733d213SAndy Adamson 12200733d213SAndy Adamson strhashval = clientstr_hashval(dname); 12210733d213SAndy Adamson 12220733d213SAndy Adamson nfs4_lock_state(); 12230733d213SAndy Adamson status = nfs_ok; 12240733d213SAndy Adamson 1225a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, true); 12260733d213SAndy Adamson if (conf) { 12270733d213SAndy Adamson if (!same_verf(&verf, &conf->cl_verifier)) { 12280733d213SAndy Adamson /* 18.35.4 case 8 */ 12290733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12300733d213SAndy Adamson status = nfserr_not_same; 12310733d213SAndy Adamson goto out; 12320733d213SAndy Adamson } 12330733d213SAndy Adamson /* Client reboot: destroy old state */ 12340733d213SAndy Adamson expire_client(conf); 12350733d213SAndy Adamson goto out_new; 12360733d213SAndy Adamson } 12370733d213SAndy Adamson if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 12380733d213SAndy Adamson /* 18.35.4 case 9 */ 12390733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12400733d213SAndy Adamson status = nfserr_perm; 12410733d213SAndy Adamson goto out; 12420733d213SAndy Adamson } 12430733d213SAndy Adamson expire_client(conf); 12440733d213SAndy Adamson goto out_new; 12450733d213SAndy Adamson } 12460733d213SAndy Adamson if (ip_addr != conf->cl_addr && 12470733d213SAndy Adamson !(exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A)) { 12480733d213SAndy Adamson /* Client collision. 18.35.4 case 3 */ 12490733d213SAndy Adamson status = nfserr_clid_inuse; 12500733d213SAndy Adamson goto out; 12510733d213SAndy Adamson } 12520733d213SAndy Adamson /* 12530733d213SAndy Adamson * Set bit when the owner id and verifier map to an already 12540733d213SAndy Adamson * confirmed client id (18.35.3). 12550733d213SAndy Adamson */ 12560733d213SAndy Adamson exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; 12570733d213SAndy Adamson 12580733d213SAndy Adamson /* 12590733d213SAndy Adamson * Falling into 18.35.4 case 2, possible router replay. 12600733d213SAndy Adamson * Leave confirmed record intact and return same result. 12610733d213SAndy Adamson */ 12620733d213SAndy Adamson copy_verf(conf, &verf); 12630733d213SAndy Adamson new = conf; 12640733d213SAndy Adamson goto out_copy; 12650733d213SAndy Adamson } else { 12660733d213SAndy Adamson /* 18.35.4 case 7 */ 12670733d213SAndy Adamson if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { 12680733d213SAndy Adamson status = nfserr_noent; 12690733d213SAndy Adamson goto out; 12700733d213SAndy Adamson } 12710733d213SAndy Adamson } 12720733d213SAndy Adamson 1273a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, true); 12740733d213SAndy Adamson if (unconf) { 12750733d213SAndy Adamson /* 12760733d213SAndy Adamson * Possible retry or client restart. Per 18.35.4 case 4, 12770733d213SAndy Adamson * a new unconfirmed record should be generated regardless 12780733d213SAndy Adamson * of whether any properties have changed. 12790733d213SAndy Adamson */ 12800733d213SAndy Adamson expire_client(unconf); 12810733d213SAndy Adamson } 12820733d213SAndy Adamson 12830733d213SAndy Adamson out_new: 12840733d213SAndy Adamson /* Normal case */ 12850733d213SAndy Adamson new = create_client(exid->clname, dname); 12860733d213SAndy Adamson if (new == NULL) { 12870733d213SAndy Adamson status = nfserr_resource; 12880733d213SAndy Adamson goto out; 12890733d213SAndy Adamson } 12900733d213SAndy Adamson 12910733d213SAndy Adamson copy_verf(new, &verf); 12920733d213SAndy Adamson copy_cred(&new->cl_cred, &rqstp->rq_cred); 12930733d213SAndy Adamson new->cl_addr = ip_addr; 12940733d213SAndy Adamson gen_clid(new); 12950733d213SAndy Adamson gen_confirm(new); 12960733d213SAndy Adamson add_to_unconfirmed(new, strhashval); 12970733d213SAndy Adamson out_copy: 12980733d213SAndy Adamson exid->clientid.cl_boot = new->cl_clientid.cl_boot; 12990733d213SAndy Adamson exid->clientid.cl_id = new->cl_clientid.cl_id; 13000733d213SAndy Adamson 130138eb76a5SAndy Adamson new->cl_slot.sl_seqid = 0; 130238eb76a5SAndy Adamson exid->seqid = 1; 13030733d213SAndy Adamson nfsd4_set_ex_flags(new, exid); 13040733d213SAndy Adamson 13050733d213SAndy Adamson dprintk("nfsd4_exchange_id seqid %d flags %x\n", 130638eb76a5SAndy Adamson new->cl_slot.sl_seqid, new->cl_exchange_flags); 13070733d213SAndy Adamson status = nfs_ok; 13080733d213SAndy Adamson 13090733d213SAndy Adamson out: 13100733d213SAndy Adamson nfs4_unlock_state(); 13110733d213SAndy Adamson error: 13120733d213SAndy Adamson dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); 13130733d213SAndy Adamson return status; 1314069b6ad4SAndy Adamson } 1315069b6ad4SAndy Adamson 1316b85d4c01SBenny Halevy static int 1317b85d4c01SBenny Halevy check_slot_seqid(u32 seqid, struct nfsd4_slot *slot) 1318b85d4c01SBenny Halevy { 1319b85d4c01SBenny Halevy dprintk("%s enter. seqid %d slot->sl_seqid %d\n", __func__, seqid, 1320b85d4c01SBenny Halevy slot->sl_seqid); 1321b85d4c01SBenny Halevy 1322b85d4c01SBenny Halevy /* The slot is in use, and no response has been sent. */ 1323b85d4c01SBenny Halevy if (slot->sl_inuse) { 1324b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1325b85d4c01SBenny Halevy return nfserr_jukebox; 1326b85d4c01SBenny Halevy else 1327b85d4c01SBenny Halevy return nfserr_seq_misordered; 1328b85d4c01SBenny Halevy } 1329b85d4c01SBenny Halevy /* Normal */ 1330b85d4c01SBenny Halevy if (likely(seqid == slot->sl_seqid + 1)) 1331b85d4c01SBenny Halevy return nfs_ok; 1332b85d4c01SBenny Halevy /* Replay */ 1333b85d4c01SBenny Halevy if (seqid == slot->sl_seqid) 1334b85d4c01SBenny Halevy return nfserr_replay_cache; 1335b85d4c01SBenny Halevy /* Wraparound */ 1336b85d4c01SBenny Halevy if (seqid == 1 && (slot->sl_seqid + 1) == 0) 1337b85d4c01SBenny Halevy return nfs_ok; 1338b85d4c01SBenny Halevy /* Misordered replay or misordered new request */ 1339b85d4c01SBenny Halevy return nfserr_seq_misordered; 1340b85d4c01SBenny Halevy } 1341b85d4c01SBenny Halevy 1342069b6ad4SAndy Adamson __be32 1343069b6ad4SAndy Adamson nfsd4_create_session(struct svc_rqst *rqstp, 1344069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1345069b6ad4SAndy Adamson struct nfsd4_create_session *cr_ses) 1346069b6ad4SAndy Adamson { 1347ec6b5d7bSAndy Adamson u32 ip_addr = svc_addr_in(rqstp)->sin_addr.s_addr; 134838eb76a5SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1349ec6b5d7bSAndy Adamson struct nfs4_client *conf, *unconf; 135038eb76a5SAndy Adamson struct nfsd4_slot *slot = NULL; 1351ec6b5d7bSAndy Adamson int status = 0; 1352ec6b5d7bSAndy Adamson 1353ec6b5d7bSAndy Adamson nfs4_lock_state(); 1354ec6b5d7bSAndy Adamson unconf = find_unconfirmed_client(&cr_ses->clientid); 1355ec6b5d7bSAndy Adamson conf = find_confirmed_client(&cr_ses->clientid); 1356ec6b5d7bSAndy Adamson 1357ec6b5d7bSAndy Adamson if (conf) { 135838eb76a5SAndy Adamson slot = &conf->cl_slot; 135938eb76a5SAndy Adamson status = check_slot_seqid(cr_ses->seqid, slot); 136038eb76a5SAndy Adamson if (status == nfserr_replay_cache) { 1361ec6b5d7bSAndy Adamson dprintk("Got a create_session replay! seqid= %d\n", 136238eb76a5SAndy Adamson slot->sl_seqid); 136338eb76a5SAndy Adamson cstate->slot = slot; 136438eb76a5SAndy Adamson cstate->status = status; 136538eb76a5SAndy Adamson /* Return the cached reply status */ 1366bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, NULL); 136738eb76a5SAndy Adamson goto out; 136838eb76a5SAndy Adamson } else if (cr_ses->seqid != conf->cl_slot.sl_seqid + 1) { 1369ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1370ec6b5d7bSAndy Adamson dprintk("Sequence misordered!\n"); 1371ec6b5d7bSAndy Adamson dprintk("Expected seqid= %d but got seqid= %d\n", 137238eb76a5SAndy Adamson slot->sl_seqid, cr_ses->seqid); 1373ec6b5d7bSAndy Adamson goto out; 1374ec6b5d7bSAndy Adamson } 137538eb76a5SAndy Adamson conf->cl_slot.sl_seqid++; 1376ec6b5d7bSAndy Adamson } else if (unconf) { 1377ec6b5d7bSAndy Adamson if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || 1378ec6b5d7bSAndy Adamson (ip_addr != unconf->cl_addr)) { 1379ec6b5d7bSAndy Adamson status = nfserr_clid_inuse; 1380ec6b5d7bSAndy Adamson goto out; 1381ec6b5d7bSAndy Adamson } 1382ec6b5d7bSAndy Adamson 138338eb76a5SAndy Adamson slot = &unconf->cl_slot; 138438eb76a5SAndy Adamson status = check_slot_seqid(cr_ses->seqid, slot); 138538eb76a5SAndy Adamson if (status) { 138638eb76a5SAndy Adamson /* an unconfirmed replay returns misordered */ 1387ec6b5d7bSAndy Adamson status = nfserr_seq_misordered; 1388ec6b5d7bSAndy Adamson goto out; 1389ec6b5d7bSAndy Adamson } 1390ec6b5d7bSAndy Adamson 139138eb76a5SAndy Adamson slot->sl_seqid++; /* from 0 to 1 */ 1392ec6b5d7bSAndy Adamson move_to_confirmed(unconf); 1393ec6b5d7bSAndy Adamson 1394ec6b5d7bSAndy Adamson /* 1395ec6b5d7bSAndy Adamson * We do not support RDMA or persistent sessions 1396ec6b5d7bSAndy Adamson */ 1397ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_PERSIST; 1398ec6b5d7bSAndy Adamson cr_ses->flags &= ~SESSION4_RDMA; 1399ec6b5d7bSAndy Adamson 1400ec6b5d7bSAndy Adamson conf = unconf; 1401ec6b5d7bSAndy Adamson } else { 1402ec6b5d7bSAndy Adamson status = nfserr_stale_clientid; 1403ec6b5d7bSAndy Adamson goto out; 1404ec6b5d7bSAndy Adamson } 1405ec6b5d7bSAndy Adamson 1406ec6b5d7bSAndy Adamson status = alloc_init_session(rqstp, conf, cr_ses); 1407ec6b5d7bSAndy Adamson if (status) 1408ec6b5d7bSAndy Adamson goto out; 1409ec6b5d7bSAndy Adamson 1410ec6b5d7bSAndy Adamson memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, 1411ec6b5d7bSAndy Adamson NFS4_MAX_SESSIONID_LEN); 141238eb76a5SAndy Adamson cr_ses->seqid = slot->sl_seqid; 1413ec6b5d7bSAndy Adamson 141438eb76a5SAndy Adamson slot->sl_inuse = true; 141538eb76a5SAndy Adamson cstate->slot = slot; 1416bf864a31SAndy Adamson /* Ensure a page is used for the cache */ 1417bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = 1; 1418ec6b5d7bSAndy Adamson out: 1419ec6b5d7bSAndy Adamson nfs4_unlock_state(); 1420ec6b5d7bSAndy Adamson dprintk("%s returns %d\n", __func__, ntohl(status)); 1421ec6b5d7bSAndy Adamson return status; 1422069b6ad4SAndy Adamson } 1423069b6ad4SAndy Adamson 1424069b6ad4SAndy Adamson __be32 1425069b6ad4SAndy Adamson nfsd4_destroy_session(struct svc_rqst *r, 1426069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1427069b6ad4SAndy Adamson struct nfsd4_destroy_session *sessionid) 1428069b6ad4SAndy Adamson { 1429e10e0cfcSBenny Halevy struct nfsd4_session *ses; 1430e10e0cfcSBenny Halevy u32 status = nfserr_badsession; 1431e10e0cfcSBenny Halevy 1432e10e0cfcSBenny Halevy /* Notes: 1433e10e0cfcSBenny Halevy * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid 1434e10e0cfcSBenny Halevy * - Should we return nfserr_back_chan_busy if waiting for 1435e10e0cfcSBenny Halevy * callbacks on to-be-destroyed session? 1436e10e0cfcSBenny Halevy * - Do we need to clear any callback info from previous session? 1437e10e0cfcSBenny Halevy */ 1438e10e0cfcSBenny Halevy 1439e10e0cfcSBenny Halevy dump_sessionid(__func__, &sessionid->sessionid); 1440e10e0cfcSBenny Halevy spin_lock(&sessionid_lock); 1441e10e0cfcSBenny Halevy ses = find_in_sessionid_hashtbl(&sessionid->sessionid); 1442e10e0cfcSBenny Halevy if (!ses) { 1443e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1444e10e0cfcSBenny Halevy goto out; 1445e10e0cfcSBenny Halevy } 1446e10e0cfcSBenny Halevy 1447e10e0cfcSBenny Halevy unhash_session(ses); 1448e10e0cfcSBenny Halevy spin_unlock(&sessionid_lock); 1449e10e0cfcSBenny Halevy 1450e10e0cfcSBenny Halevy /* wait for callbacks */ 1451e10e0cfcSBenny Halevy shutdown_callback_client(ses->se_client); 1452e10e0cfcSBenny Halevy nfsd4_put_session(ses); 1453e10e0cfcSBenny Halevy status = nfs_ok; 1454e10e0cfcSBenny Halevy out: 1455e10e0cfcSBenny Halevy dprintk("%s returns %d\n", __func__, ntohl(status)); 1456e10e0cfcSBenny Halevy return status; 1457069b6ad4SAndy Adamson } 1458069b6ad4SAndy Adamson 1459069b6ad4SAndy Adamson __be32 1460b85d4c01SBenny Halevy nfsd4_sequence(struct svc_rqst *rqstp, 1461069b6ad4SAndy Adamson struct nfsd4_compound_state *cstate, 1462069b6ad4SAndy Adamson struct nfsd4_sequence *seq) 1463069b6ad4SAndy Adamson { 1464f9bb94c4SAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 1465b85d4c01SBenny Halevy struct nfsd4_session *session; 1466b85d4c01SBenny Halevy struct nfsd4_slot *slot; 1467b85d4c01SBenny Halevy int status; 1468b85d4c01SBenny Halevy 1469f9bb94c4SAndy Adamson if (resp->opcnt != 1) 1470f9bb94c4SAndy Adamson return nfserr_sequence_pos; 1471f9bb94c4SAndy Adamson 1472b85d4c01SBenny Halevy spin_lock(&sessionid_lock); 1473b85d4c01SBenny Halevy status = nfserr_badsession; 1474b85d4c01SBenny Halevy session = find_in_sessionid_hashtbl(&seq->sessionid); 1475b85d4c01SBenny Halevy if (!session) 1476b85d4c01SBenny Halevy goto out; 1477b85d4c01SBenny Halevy 1478b85d4c01SBenny Halevy status = nfserr_badslot; 1479b85d4c01SBenny Halevy if (seq->slotid >= session->se_fnumslots) 1480b85d4c01SBenny Halevy goto out; 1481b85d4c01SBenny Halevy 1482b85d4c01SBenny Halevy slot = &session->se_slots[seq->slotid]; 1483b85d4c01SBenny Halevy dprintk("%s: slotid %d\n", __func__, seq->slotid); 1484b85d4c01SBenny Halevy 1485b85d4c01SBenny Halevy status = check_slot_seqid(seq->seqid, slot); 1486b85d4c01SBenny Halevy if (status == nfserr_replay_cache) { 1487b85d4c01SBenny Halevy cstate->slot = slot; 1488b85d4c01SBenny Halevy cstate->session = session; 1489da3846a2SAndy Adamson /* Return the cached reply status and set cstate->status 1490da3846a2SAndy Adamson * for nfsd4_svc_encode_compoundres processing */ 1491bf864a31SAndy Adamson status = nfsd4_replay_cache_entry(resp, seq); 1492da3846a2SAndy Adamson cstate->status = nfserr_replay_cache; 1493b85d4c01SBenny Halevy goto replay_cache; 1494b85d4c01SBenny Halevy } 1495b85d4c01SBenny Halevy if (status) 1496b85d4c01SBenny Halevy goto out; 1497b85d4c01SBenny Halevy 1498b85d4c01SBenny Halevy /* Success! bump slot seqid */ 1499b85d4c01SBenny Halevy slot->sl_inuse = true; 1500b85d4c01SBenny Halevy slot->sl_seqid = seq->seqid; 1501bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = seq->cachethis; 1502bf864a31SAndy Adamson /* Always set the cache entry cachethis for solo sequence */ 1503bf864a31SAndy Adamson if (nfsd4_is_solo_sequence(resp)) 1504bf864a31SAndy Adamson slot->sl_cache_entry.ce_cachethis = 1; 1505b85d4c01SBenny Halevy 1506b85d4c01SBenny Halevy cstate->slot = slot; 1507b85d4c01SBenny Halevy cstate->session = session; 1508b85d4c01SBenny Halevy 1509b85d4c01SBenny Halevy replay_cache: 1510b85d4c01SBenny Halevy /* Renew the clientid on success and on replay. 1511b85d4c01SBenny Halevy * Hold a session reference until done processing the compound: 1512b85d4c01SBenny Halevy * nfsd4_put_session called only if the cstate slot is set. 1513b85d4c01SBenny Halevy */ 1514b85d4c01SBenny Halevy renew_client(session->se_client); 1515b85d4c01SBenny Halevy nfsd4_get_session(session); 1516b85d4c01SBenny Halevy out: 1517b85d4c01SBenny Halevy spin_unlock(&sessionid_lock); 1518b85d4c01SBenny Halevy dprintk("%s: return %d\n", __func__, ntohl(status)); 1519b85d4c01SBenny Halevy return status; 1520069b6ad4SAndy Adamson } 1521069b6ad4SAndy Adamson 1522069b6ad4SAndy Adamson __be32 1523b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1524b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 15251da177e4SLinus Torvalds { 152627459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 15271da177e4SLinus Torvalds struct xdr_netobj clname = { 15281da177e4SLinus Torvalds .len = setclid->se_namelen, 15291da177e4SLinus Torvalds .data = setclid->se_name, 15301da177e4SLinus Torvalds }; 15311da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 15321da177e4SLinus Torvalds unsigned int strhashval; 153328ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 1534b37ad28bSAl Viro __be32 status; 153568e76ad0SOlga Kornievskaia char *princ; 1536a55370a3SNeilBrown char dname[HEXDIR_LEN]; 15371da177e4SLinus Torvalds 15381da177e4SLinus Torvalds if (!check_name(clname)) 153973aea4ecSNeil Brown return nfserr_inval; 15401da177e4SLinus Torvalds 1541a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 1542a55370a3SNeilBrown if (status) 154373aea4ecSNeil Brown return status; 1544a55370a3SNeilBrown 15451da177e4SLinus Torvalds /* 15461da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 15471da177e4SLinus Torvalds * We get here on a DRC miss. 15481da177e4SLinus Torvalds */ 15491da177e4SLinus Torvalds 1550a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 15511da177e4SLinus Torvalds 15521da177e4SLinus Torvalds nfs4_lock_state(); 1553a1bcecd2SAndy Adamson conf = find_confirmed_client_by_str(dname, strhashval, false); 155428ce6054SNeilBrown if (conf) { 1555a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 15561da177e4SLinus Torvalds status = nfserr_clid_inuse; 1557026722c2SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { 1558026722c2SJ. Bruce Fields dprintk("NFSD: setclientid: string in use by client" 1559026722c2SJ. Bruce Fields " at %pI4\n", &conf->cl_addr); 15601da177e4SLinus Torvalds goto out; 15611da177e4SLinus Torvalds } 15621da177e4SLinus Torvalds } 1563a186e767SJ. Bruce Fields /* 1564a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 1565a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 1566a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 1567a186e767SJ. Bruce Fields */ 1568a1bcecd2SAndy Adamson unconf = find_unconfirmed_client_by_str(dname, strhashval, false); 15691da177e4SLinus Torvalds status = nfserr_resource; 15701da177e4SLinus Torvalds if (!conf) { 15711da177e4SLinus Torvalds /* 1572a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 1573a186e767SJ. Bruce Fields * placed first, because it is the normal case 15741da177e4SLinus Torvalds */ 15751da177e4SLinus Torvalds if (unconf) 15761da177e4SLinus Torvalds expire_client(unconf); 1577a55370a3SNeilBrown new = create_client(clname, dname); 1578a55370a3SNeilBrown if (new == NULL) 15791da177e4SLinus Torvalds goto out; 15801da177e4SLinus Torvalds gen_clid(new); 1581599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 15821da177e4SLinus Torvalds /* 1583a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 1584a186e767SJ. Bruce Fields * probable callback update 15851da177e4SLinus Torvalds */ 158631f4a6c1SNeilBrown if (unconf) { 158731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 158831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 158931f4a6c1SNeilBrown * This has the advantage that there is at most 159031f4a6c1SNeilBrown * one {*x***} in either list at any time. 159131f4a6c1SNeilBrown */ 15921da177e4SLinus Torvalds expire_client(unconf); 15931da177e4SLinus Torvalds } 1594a55370a3SNeilBrown new = create_client(clname, dname); 1595a55370a3SNeilBrown if (new == NULL) 15961da177e4SLinus Torvalds goto out; 15971da177e4SLinus Torvalds copy_clid(new, conf); 15981da177e4SLinus Torvalds } else if (!unconf) { 15991da177e4SLinus Torvalds /* 1600a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 1601a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1602a186e767SJ. Bruce Fields * confirmed. 16031da177e4SLinus Torvalds */ 1604a55370a3SNeilBrown new = create_client(clname, dname); 1605a55370a3SNeilBrown if (new == NULL) 16061da177e4SLinus Torvalds goto out; 16071da177e4SLinus Torvalds gen_clid(new); 160849ba8781SJ. Bruce Fields } else { 16091da177e4SLinus Torvalds /* 1610a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 1611a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 1612a186e767SJ. Bruce Fields * confirmed. 16131da177e4SLinus Torvalds */ 16141da177e4SLinus Torvalds expire_client(unconf); 1615a55370a3SNeilBrown new = create_client(clname, dname); 1616a55370a3SNeilBrown if (new == NULL) 16171da177e4SLinus Torvalds goto out; 16181da177e4SLinus Torvalds gen_clid(new); 16191da177e4SLinus Torvalds } 1620c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 1621c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 162261054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 162368e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 162468e76ad0SOlga Kornievskaia if (princ) { 162568e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 162668e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 162768e76ad0SOlga Kornievskaia free_client(new); 162868e76ad0SOlga Kornievskaia goto out; 162968e76ad0SOlga Kornievskaia } 163068e76ad0SOlga Kornievskaia } 1631c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 1632c175b83cSJ. Bruce Fields gen_confirm(new); 1633c175b83cSJ. Bruce Fields gen_callback(new, setclid); 1634c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 16351da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 16361da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 16371da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 16381da177e4SLinus Torvalds status = nfs_ok; 16391da177e4SLinus Torvalds out: 16401da177e4SLinus Torvalds nfs4_unlock_state(); 16411da177e4SLinus Torvalds return status; 16421da177e4SLinus Torvalds } 16431da177e4SLinus Torvalds 16441da177e4SLinus Torvalds 16451da177e4SLinus Torvalds /* 1646a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 1647a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 1648a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 16491da177e4SLinus Torvalds */ 1650b37ad28bSAl Viro __be32 1651b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 1652b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 1653b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 16541da177e4SLinus Torvalds { 165527459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 165621ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 16571da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 16581da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 1659b37ad28bSAl Viro __be32 status; 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 16621da177e4SLinus Torvalds return nfserr_stale_clientid; 16631da177e4SLinus Torvalds /* 16641da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 16651da177e4SLinus Torvalds * We get here on a DRC miss. 16661da177e4SLinus Torvalds */ 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds nfs4_lock_state(); 166921ab45a4SNeilBrown 167021ab45a4SNeilBrown conf = find_confirmed_client(clid); 167121ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 167221ab45a4SNeilBrown 167322de4d83SNeilBrown status = nfserr_clid_inuse; 167427459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 16751da177e4SLinus Torvalds goto out; 167627459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 16771da177e4SLinus Torvalds goto out; 167821ab45a4SNeilBrown 1679a186e767SJ. Bruce Fields /* 1680a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 1681a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 1682a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 1683a186e767SJ. Bruce Fields */ 1684366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 1685a186e767SJ. Bruce Fields /* 1686a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 1687a186e767SJ. Bruce Fields * callback update 16887c79f737SNeilBrown */ 1689599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 16901da177e4SLinus Torvalds status = nfserr_clid_inuse; 16911da177e4SLinus Torvalds else { 16921a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 16931a69c179SNeilBrown * change request correctly. */ 1694cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 16951a69c179SNeilBrown expire_client(unconf); 16961da177e4SLinus Torvalds status = nfs_ok; 16971a69c179SNeilBrown 16981da177e4SLinus Torvalds } 1699f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 1700a186e767SJ. Bruce Fields /* 1701a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 1702a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 1703a186e767SJ. Bruce Fields * do nothing. 17047c79f737SNeilBrown */ 1705599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 17061da177e4SLinus Torvalds status = nfserr_clid_inuse; 170721ab45a4SNeilBrown else 17081da177e4SLinus Torvalds status = nfs_ok; 17097c79f737SNeilBrown } else if (!conf && unconf 1710599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 1711a186e767SJ. Bruce Fields /* 1712a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 1713a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 17141da177e4SLinus Torvalds */ 1715599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 17161da177e4SLinus Torvalds status = nfserr_clid_inuse; 17171da177e4SLinus Torvalds } else { 17181a69c179SNeilBrown unsigned int hash = 17191a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 17201a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 1721a1bcecd2SAndy Adamson hash, false); 17221a69c179SNeilBrown if (conf) { 1723c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 17241a69c179SNeilBrown expire_client(conf); 17251a69c179SNeilBrown } 17261da177e4SLinus Torvalds move_to_confirmed(unconf); 172721ab45a4SNeilBrown conf = unconf; 172846f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 17291a69c179SNeilBrown status = nfs_ok; 17301da177e4SLinus Torvalds } 1731599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 1732599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 17337c79f737SNeilBrown &confirm)))) { 1734a186e767SJ. Bruce Fields /* 1735a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 1736a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 17371da177e4SLinus Torvalds */ 17381da177e4SLinus Torvalds status = nfserr_stale_clientid; 17397c79f737SNeilBrown } else { 17401da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 174122de4d83SNeilBrown status = nfserr_clid_inuse; 174208e8987cSNeilBrown } 17431da177e4SLinus Torvalds out: 17441da177e4SLinus Torvalds nfs4_unlock_state(); 17451da177e4SLinus Torvalds return status; 17461da177e4SLinus Torvalds } 17471da177e4SLinus Torvalds 17481da177e4SLinus Torvalds /* OPEN Share state helper functions */ 17491da177e4SLinus Torvalds static inline struct nfs4_file * 17501da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 17511da177e4SLinus Torvalds { 17521da177e4SLinus Torvalds struct nfs4_file *fp; 17531da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 17541da177e4SLinus Torvalds 1755e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 1756e60d4398SNeilBrown if (fp) { 17578b671b80SJ. Bruce Fields atomic_set(&fp->fi_ref, 1); 17581da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 17598beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 17608beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 17618b671b80SJ. Bruce Fields spin_lock(&recall_lock); 17621da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 17638b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 17641da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 17651da177e4SLinus Torvalds fp->fi_id = current_fileid++; 176647f9940cSMeelap Shah fp->fi_had_conflict = false; 17671da177e4SLinus Torvalds return fp; 17681da177e4SLinus Torvalds } 17691da177e4SLinus Torvalds return NULL; 17701da177e4SLinus Torvalds } 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds static void 1773e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1774e60d4398SNeilBrown { 1775e60d4398SNeilBrown if (*slab == NULL) 1776e60d4398SNeilBrown return; 17771a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1778e60d4398SNeilBrown *slab = NULL; 1779e60d4398SNeilBrown } 1780e60d4398SNeilBrown 1781e8ff2a84SJ. Bruce Fields void 1782e60d4398SNeilBrown nfsd4_free_slabs(void) 1783e60d4398SNeilBrown { 1784e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1785e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 17865ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 17875b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1788e60d4398SNeilBrown } 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds static int 17911da177e4SLinus Torvalds nfsd4_init_slabs(void) 17921da177e4SLinus Torvalds { 17931da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 179420c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1795e60d4398SNeilBrown if (stateowner_slab == NULL) 1796e60d4398SNeilBrown goto out_nomem; 1797e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 179820c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1799e60d4398SNeilBrown if (file_slab == NULL) 1800e60d4398SNeilBrown goto out_nomem; 18015ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 180220c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 18035ac049acSNeilBrown if (stateid_slab == NULL) 18045ac049acSNeilBrown goto out_nomem; 18055b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 180620c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 18075b2d21c1SNeilBrown if (deleg_slab == NULL) 18085b2d21c1SNeilBrown goto out_nomem; 1809e60d4398SNeilBrown return 0; 1810e60d4398SNeilBrown out_nomem: 1811e60d4398SNeilBrown nfsd4_free_slabs(); 18121da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 18131da177e4SLinus Torvalds return -ENOMEM; 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds 18161da177e4SLinus Torvalds void 18171da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 18181da177e4SLinus Torvalds { 18191da177e4SLinus Torvalds struct nfs4_stateowner *sop = 18201da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 18211da177e4SLinus Torvalds kfree(sop->so_owner.data); 18221da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 18231da177e4SLinus Torvalds } 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds static inline struct nfs4_stateowner * 18261da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 18271da177e4SLinus Torvalds { 18281da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18291da177e4SLinus Torvalds 18301da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 18311da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 18321da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 18331da177e4SLinus Torvalds sop->so_owner.len = owner->len; 18341da177e4SLinus Torvalds kref_init(&sop->so_ref); 18351da177e4SLinus Torvalds return sop; 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 18381da177e4SLinus Torvalds } 18391da177e4SLinus Torvalds return NULL; 18401da177e4SLinus Torvalds } 18411da177e4SLinus Torvalds 18421da177e4SLinus Torvalds static struct nfs4_stateowner * 18431da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 18441da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18451da177e4SLinus Torvalds struct nfs4_replay *rp; 18461da177e4SLinus Torvalds unsigned int idhashval; 18471da177e4SLinus Torvalds 18481da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 18491da177e4SLinus Torvalds return NULL; 18501da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 18511da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 18521da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 18531da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1854ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1855ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 18561da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 18571da177e4SLinus Torvalds sop->so_time = 0; 18581da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 18591da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1860ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 18611da177e4SLinus Torvalds sop->so_is_open_owner = 1; 18621da177e4SLinus Torvalds sop->so_id = current_ownerid++; 18631da177e4SLinus Torvalds sop->so_client = clp; 18641da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 18651da177e4SLinus Torvalds sop->so_confirmed = 0; 18661da177e4SLinus Torvalds rp = &sop->so_replay; 1867de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 18681da177e4SLinus Torvalds rp->rp_buflen = 0; 18691da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 18701da177e4SLinus Torvalds return sop; 18711da177e4SLinus Torvalds } 18721da177e4SLinus Torvalds 18731da177e4SLinus Torvalds static inline void 18741da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 18751da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 18761da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 18771da177e4SLinus Torvalds 18781da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1879ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1880ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 18811da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 18821da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1883ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 18848beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 18851da177e4SLinus Torvalds stp->st_stateowner = sop; 188613cd2184SNeilBrown get_nfs4_file(fp); 18871da177e4SLinus Torvalds stp->st_file = fp; 188878155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 18891da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 18901da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 18911da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 18921da177e4SLinus Torvalds stp->st_access_bmap = 0; 18931da177e4SLinus Torvalds stp->st_deny_bmap = 0; 189484459a11SAndy Adamson __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, 189584459a11SAndy Adamson &stp->st_access_bmap); 18961da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 18974c4cd222SNeilBrown stp->st_openstp = NULL; 18981da177e4SLinus Torvalds } 18991da177e4SLinus Torvalds 19001da177e4SLinus Torvalds static void 19011da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 19021da177e4SLinus Torvalds { 19031da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 19041da177e4SLinus Torvalds 1905358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 19061da177e4SLinus Torvalds sop->so_time = get_seconds(); 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds 19091da177e4SLinus Torvalds static int 1910599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1911599e0a22SJ. Bruce Fields clientid_t *clid) 1912599e0a22SJ. Bruce Fields { 1913599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1914599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1915599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds 19181da177e4SLinus Torvalds static struct nfs4_stateowner * 19191da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 19201da177e4SLinus Torvalds { 19211da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 19221da177e4SLinus Torvalds 19231da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1924599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 19251da177e4SLinus Torvalds return so; 19261da177e4SLinus Torvalds } 19271da177e4SLinus Torvalds return NULL; 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds 19301da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 19311da177e4SLinus Torvalds static struct nfs4_file * 19321da177e4SLinus Torvalds find_file(struct inode *ino) 19331da177e4SLinus Torvalds { 19341da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 19351da177e4SLinus Torvalds struct nfs4_file *fp; 19361da177e4SLinus Torvalds 19378b671b80SJ. Bruce Fields spin_lock(&recall_lock); 19381da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 193913cd2184SNeilBrown if (fp->fi_inode == ino) { 194013cd2184SNeilBrown get_nfs4_file(fp); 19418b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 19421da177e4SLinus Torvalds return fp; 19431da177e4SLinus Torvalds } 194413cd2184SNeilBrown } 19458b671b80SJ. Bruce Fields spin_unlock(&recall_lock); 19461da177e4SLinus Torvalds return NULL; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 1949d87a8adeSAndy Adamson static inline int access_valid(u32 x, u32 minorversion) 1950ba5a6a19SJ. Bruce Fields { 1951d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) 19528838dc43SJ. Bruce Fields return 0; 1953d87a8adeSAndy Adamson if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) 1954d87a8adeSAndy Adamson return 0; 1955d87a8adeSAndy Adamson x &= ~NFS4_SHARE_ACCESS_MASK; 1956d87a8adeSAndy Adamson if (minorversion && x) { 1957d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) 1958d87a8adeSAndy Adamson return 0; 1959d87a8adeSAndy Adamson if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) 1960d87a8adeSAndy Adamson return 0; 1961d87a8adeSAndy Adamson x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); 1962d87a8adeSAndy Adamson } 1963d87a8adeSAndy Adamson if (x) 19648838dc43SJ. Bruce Fields return 0; 19658838dc43SJ. Bruce Fields return 1; 1966ba5a6a19SJ. Bruce Fields } 1967ba5a6a19SJ. Bruce Fields 19688838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1969ba5a6a19SJ. Bruce Fields { 19708838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 19718838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1972ba5a6a19SJ. Bruce Fields } 19731da177e4SLinus Torvalds 19744f83aa30SJ. Bruce Fields /* 19754f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 19764f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 19774f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 19784f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 19794f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 19804f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 19814f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 19824f83aa30SJ. Bruce Fields * 19834f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 19844f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 19854f83aa30SJ. Bruce Fields * 19864f83aa30SJ. Bruce Fields * OPEN allow read, deny write 19874f83aa30SJ. Bruce Fields * OPEN allow both, deny none 19884f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 19894f83aa30SJ. Bruce Fields * 19904f83aa30SJ. Bruce Fields * which we should reject. 19914f83aa30SJ. Bruce Fields */ 1992fd39ca9aSNeilBrown static void 19931da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 19941da177e4SLinus Torvalds int i; 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds *access = 0; 19971da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 19981da177e4SLinus Torvalds if (test_bit(i, &bmap)) 19991da177e4SLinus Torvalds *access |= i; 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds 2003fd39ca9aSNeilBrown static void 20041da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 20051da177e4SLinus Torvalds int i; 20061da177e4SLinus Torvalds 20071da177e4SLinus Torvalds *deny = 0; 20081da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 20091da177e4SLinus Torvalds if (test_bit(i, &bmap)) 20101da177e4SLinus Torvalds *deny |= i ; 20111da177e4SLinus Torvalds } 20121da177e4SLinus Torvalds } 20131da177e4SLinus Torvalds 20141da177e4SLinus Torvalds static int 20151da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 20161da177e4SLinus Torvalds unsigned int access, deny; 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 20191da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 20201da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 20211da177e4SLinus Torvalds return 0; 20221da177e4SLinus Torvalds return 1; 20231da177e4SLinus Torvalds } 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds /* 20261da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 20271da177e4SLinus Torvalds * WRITE with all zero or all one stateid 20281da177e4SLinus Torvalds */ 2029b37ad28bSAl Viro static __be32 20301da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 20311da177e4SLinus Torvalds { 20321da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20331da177e4SLinus Torvalds struct nfs4_file *fp; 20341da177e4SLinus Torvalds struct nfs4_stateid *stp; 2035b37ad28bSAl Viro __be32 ret; 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 20381da177e4SLinus Torvalds 20391da177e4SLinus Torvalds fp = find_file(ino); 204013cd2184SNeilBrown if (!fp) 204113cd2184SNeilBrown return nfs_ok; 2042b700949bSNeilBrown ret = nfserr_locked; 20431da177e4SLinus Torvalds /* Search for conflicting share reservations */ 20448beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 20451da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 20461da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 204713cd2184SNeilBrown goto out; 20481da177e4SLinus Torvalds } 204913cd2184SNeilBrown ret = nfs_ok; 205013cd2184SNeilBrown out: 205113cd2184SNeilBrown put_nfs4_file(fp); 205213cd2184SNeilBrown return ret; 20531da177e4SLinus Torvalds } 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds static inline void 20561da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 20571da177e4SLinus Torvalds { 20581da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 2059aceaf78dSDave Hansen drop_file_write_access(filp); 20601da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 20611da177e4SLinus Torvalds } 20621da177e4SLinus Torvalds } 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds /* 20651da177e4SLinus Torvalds * Recall a delegation 20661da177e4SLinus Torvalds */ 20671da177e4SLinus Torvalds static int 20681da177e4SLinus Torvalds do_recall(void *__dp) 20691da177e4SLinus Torvalds { 20701da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 20711da177e4SLinus Torvalds 207247f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 20731da177e4SLinus Torvalds nfsd4_cb_recall(dp); 20741da177e4SLinus Torvalds return 0; 20751da177e4SLinus Torvalds } 20761da177e4SLinus Torvalds 20771da177e4SLinus Torvalds /* 20781da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 20791da177e4SLinus Torvalds * by the lease (file_lock) 20801da177e4SLinus Torvalds * 20811da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 20821da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 20831da177e4SLinus Torvalds * lease. 20841da177e4SLinus Torvalds */ 20851da177e4SLinus Torvalds static 20861da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 20871da177e4SLinus Torvalds { 20881da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 20891da177e4SLinus Torvalds struct task_struct *t; 20901da177e4SLinus Torvalds 20911da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 20921da177e4SLinus Torvalds if (!dp) 20931da177e4SLinus Torvalds return; 20941da177e4SLinus Torvalds 20951da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 20961da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 20971da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 20981da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 20991da177e4SLinus Torvalds * it's safe to take a reference: */ 21001da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 2101cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 21021da177e4SLinus Torvalds 21031da177e4SLinus Torvalds spin_lock(&recall_lock); 21041da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 21051da177e4SLinus Torvalds spin_unlock(&recall_lock); 21061da177e4SLinus Torvalds 21071da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 21081da177e4SLinus Torvalds dp->dl_time = get_seconds(); 21091da177e4SLinus Torvalds 21100272e1fdSJ. Bruce Fields /* 21110272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 21120272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 21130272e1fdSJ. Bruce Fields * in time. 21140272e1fdSJ. Bruce Fields */ 21150272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 21161da177e4SLinus Torvalds 21171da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 21181da177e4SLinus Torvalds if (IS_ERR(t)) { 21191da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 21201da177e4SLinus Torvalds 21211da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 21221da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 21231da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 2124cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 21251da177e4SLinus Torvalds nfs4_put_delegation(dp); 21261da177e4SLinus Torvalds } 21271da177e4SLinus Torvalds } 21281da177e4SLinus Torvalds 21291da177e4SLinus Torvalds /* 21301da177e4SLinus Torvalds * The file_lock is being reapd. 21311da177e4SLinus Torvalds * 21321da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 21331da177e4SLinus Torvalds */ 21341da177e4SLinus Torvalds static 21351da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 21361da177e4SLinus Torvalds { 21371da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 21401da177e4SLinus Torvalds 21411da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 21421da177e4SLinus Torvalds return; 21431da177e4SLinus Torvalds dp->dl_flock = NULL; 21441da177e4SLinus Torvalds } 21451da177e4SLinus Torvalds 21461da177e4SLinus Torvalds /* 21471da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 21481da177e4SLinus Torvalds * 2149a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 21501da177e4SLinus Torvalds */ 21511da177e4SLinus Torvalds static 21521da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 21531da177e4SLinus Torvalds { 21541da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 21551da177e4SLinus Torvalds 21561da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 21571da177e4SLinus Torvalds if (!dp) 21581da177e4SLinus Torvalds return; 21591da177e4SLinus Torvalds dp->dl_flock = new; 21601da177e4SLinus Torvalds } 21611da177e4SLinus Torvalds 21621da177e4SLinus Torvalds /* 2163a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 21641da177e4SLinus Torvalds */ 21651da177e4SLinus Torvalds static 21661da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 21671da177e4SLinus Torvalds { 21681da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 21691da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 21701da177e4SLinus Torvalds struct nfs4_delegation *tryd = 21711da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 21721da177e4SLinus Torvalds 21731da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 21741da177e4SLinus Torvalds return 0; 21751da177e4SLinus Torvalds 21761da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 21771da177e4SLinus Torvalds } 21781da177e4SLinus Torvalds 21791da177e4SLinus Torvalds 21801da177e4SLinus Torvalds static 21811da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 21821da177e4SLinus Torvalds { 21831da177e4SLinus Torvalds if (arg & F_UNLCK) 21841da177e4SLinus Torvalds return lease_modify(onlist, arg); 21851da177e4SLinus Torvalds else 21861da177e4SLinus Torvalds return -EAGAIN; 21871da177e4SLinus Torvalds } 21881da177e4SLinus Torvalds 2189fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 21901da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 21911da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 21921da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 21931da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 21941da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 21951da177e4SLinus Torvalds }; 21961da177e4SLinus Torvalds 21971da177e4SLinus Torvalds 2198b37ad28bSAl Viro __be32 21996668958fSAndy Adamson nfsd4_process_open1(struct nfsd4_compound_state *cstate, 22006668958fSAndy Adamson struct nfsd4_open *open) 22011da177e4SLinus Torvalds { 22021da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 22031da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 22041da177e4SLinus Torvalds unsigned int strhashval; 22051da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvalds if (!check_name(open->op_owner)) 22080f442aa2SJ. Bruce Fields return nfserr_inval; 22091da177e4SLinus Torvalds 22101da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 22111da177e4SLinus Torvalds return nfserr_stale_clientid; 22121da177e4SLinus Torvalds 22131da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 22141da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 22151da177e4SLinus Torvalds open->op_stateowner = sop; 22160f442aa2SJ. Bruce Fields if (!sop) { 22170f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 22180f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 22190f442aa2SJ. Bruce Fields if (clp == NULL) 22200f442aa2SJ. Bruce Fields return nfserr_expired; 22210f442aa2SJ. Bruce Fields goto renew; 22220f442aa2SJ. Bruce Fields } 22236668958fSAndy Adamson /* When sessions are used, skip open sequenceid processing */ 22246668958fSAndy Adamson if (nfsd4_has_session(cstate)) 22256668958fSAndy Adamson goto renew; 2226ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 22270f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 2228ae8b6253SJ. Bruce Fields clp = sop->so_client; 2229f044ff83SJ. Bruce Fields release_openowner(sop); 22300f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 2231ae8b6253SJ. Bruce Fields goto renew; 22320f442aa2SJ. Bruce Fields } 22330f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 22341da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 2235a90b061cSAl Viro return nfserr_replay_me; 22361da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 22371da177e4SLinus Torvalds * that we don't even have replay data saved! 22381da177e4SLinus Torvalds * Therefore, we have no choice but to continue 22391da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 22401da177e4SLinus Torvalds * fail again for the same reason. 22411da177e4SLinus Torvalds */ 22420f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 22431da177e4SLinus Torvalds goto renew; 22441da177e4SLinus Torvalds } 22450f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 22460f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 22470f442aa2SJ. Bruce Fields renew: 22480f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 22491da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 22501da177e4SLinus Torvalds if (sop == NULL) 22510f442aa2SJ. Bruce Fields return nfserr_resource; 22521da177e4SLinus Torvalds open->op_stateowner = sop; 22530f442aa2SJ. Bruce Fields } 22540f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 22551da177e4SLinus Torvalds renew_client(sop->so_client); 22560f442aa2SJ. Bruce Fields return nfs_ok; 22571da177e4SLinus Torvalds } 22581da177e4SLinus Torvalds 2259b37ad28bSAl Viro static inline __be32 22604a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 22614a6e43e6SNeilBrown { 22624a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 22634a6e43e6SNeilBrown return nfserr_openmode; 22644a6e43e6SNeilBrown else 22654a6e43e6SNeilBrown return nfs_ok; 22664a6e43e6SNeilBrown } 22674a6e43e6SNeilBrown 226852f4fb43SNeilBrown static struct nfs4_delegation * 226952f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 227052f4fb43SNeilBrown { 227152f4fb43SNeilBrown struct nfs4_delegation *dp; 227252f4fb43SNeilBrown 2273ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 227452f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 227552f4fb43SNeilBrown return dp; 227652f4fb43SNeilBrown } 227752f4fb43SNeilBrown return NULL; 227852f4fb43SNeilBrown } 227952f4fb43SNeilBrown 2280b37ad28bSAl Viro static __be32 2281567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 2282567d9829SNeilBrown struct nfs4_delegation **dp) 2283567d9829SNeilBrown { 2284567d9829SNeilBrown int flags; 2285b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 2286567d9829SNeilBrown 2287567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 2288567d9829SNeilBrown if (*dp == NULL) 2289c44c5eebSNeilBrown goto out; 2290567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 2291567d9829SNeilBrown RD_STATE : WR_STATE; 2292567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 2293567d9829SNeilBrown if (status) 2294567d9829SNeilBrown *dp = NULL; 2295c44c5eebSNeilBrown out: 2296c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 2297c44c5eebSNeilBrown return nfs_ok; 2298c44c5eebSNeilBrown if (status) 2299c44c5eebSNeilBrown return status; 2300c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 2301c44c5eebSNeilBrown return nfs_ok; 2302567d9829SNeilBrown } 2303567d9829SNeilBrown 2304b37ad28bSAl Viro static __be32 23051da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 23061da177e4SLinus Torvalds { 23071da177e4SLinus Torvalds struct nfs4_stateid *local; 2308b37ad28bSAl Viro __be32 status = nfserr_share_denied; 23091da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 23101da177e4SLinus Torvalds 23118beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 23121da177e4SLinus Torvalds /* ignore lock owners */ 23131da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 23141da177e4SLinus Torvalds continue; 23151da177e4SLinus Torvalds /* remember if we have seen this open owner */ 23161da177e4SLinus Torvalds if (local->st_stateowner == sop) 23171da177e4SLinus Torvalds *stpp = local; 23181da177e4SLinus Torvalds /* check for conflicting share reservations */ 23191da177e4SLinus Torvalds if (!test_share(local, open)) 23201da177e4SLinus Torvalds goto out; 23211da177e4SLinus Torvalds } 23221da177e4SLinus Torvalds status = 0; 23231da177e4SLinus Torvalds out: 23241da177e4SLinus Torvalds return status; 23251da177e4SLinus Torvalds } 23261da177e4SLinus Torvalds 23275ac049acSNeilBrown static inline struct nfs4_stateid * 23285ac049acSNeilBrown nfs4_alloc_stateid(void) 23295ac049acSNeilBrown { 23305ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 23315ac049acSNeilBrown } 23325ac049acSNeilBrown 2333b37ad28bSAl Viro static __be32 23341da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 2335567d9829SNeilBrown struct nfs4_delegation *dp, 23361da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 23371da177e4SLinus Torvalds { 23381da177e4SLinus Torvalds struct nfs4_stateid *stp; 23391da177e4SLinus Torvalds 23405ac049acSNeilBrown stp = nfs4_alloc_stateid(); 23411da177e4SLinus Torvalds if (stp == NULL) 23421da177e4SLinus Torvalds return nfserr_resource; 23431da177e4SLinus Torvalds 2344567d9829SNeilBrown if (dp) { 2345567d9829SNeilBrown get_file(dp->dl_vfs_file); 2346567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 2347567d9829SNeilBrown } else { 2348b37ad28bSAl Viro __be32 status; 2349567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 2350567d9829SNeilBrown &stp->st_vfs_file); 23511da177e4SLinus Torvalds if (status) { 23521da177e4SLinus Torvalds if (status == nfserr_dropit) 23531da177e4SLinus Torvalds status = nfserr_jukebox; 23545ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 23551da177e4SLinus Torvalds return status; 23561da177e4SLinus Torvalds } 2357567d9829SNeilBrown } 23581da177e4SLinus Torvalds *stpp = stp; 23591da177e4SLinus Torvalds return 0; 23601da177e4SLinus Torvalds } 23611da177e4SLinus Torvalds 2362b37ad28bSAl Viro static inline __be32 23631da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 23641da177e4SLinus Torvalds struct nfsd4_open *open) 23651da177e4SLinus Torvalds { 23661da177e4SLinus Torvalds struct iattr iattr = { 23671da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 23681da177e4SLinus Torvalds .ia_size = 0, 23691da177e4SLinus Torvalds }; 23701da177e4SLinus Torvalds if (!open->op_truncate) 23711da177e4SLinus Torvalds return 0; 23721da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 23739246585aSAl Viro return nfserr_inval; 23741da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 23751da177e4SLinus Torvalds } 23761da177e4SLinus Torvalds 2377b37ad28bSAl Viro static __be32 23781da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 23791da177e4SLinus Torvalds { 23801da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 23817eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 23826c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 2383b37ad28bSAl Viro __be32 status; 23841da177e4SLinus Torvalds 23851da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23866c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 23876c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 23881da177e4SLinus Torvalds 23896c26d08fSJ. Bruce Fields if (new_writer) { 2390b37ad28bSAl Viro int err = get_write_access(inode); 2391b37ad28bSAl Viro if (err) 2392b37ad28bSAl Viro return nfserrno(err); 2393e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 2394e518f056SBenny Halevy if (err) 2395e518f056SBenny Halevy return nfserrno(err); 2396e518f056SBenny Halevy file_take_write(filp); 23976c26d08fSJ. Bruce Fields } 23981da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 23991da177e4SLinus Torvalds if (status) { 24006c26d08fSJ. Bruce Fields if (new_writer) 24011da177e4SLinus Torvalds put_write_access(inode); 24021da177e4SLinus Torvalds return status; 24031da177e4SLinus Torvalds } 24041da177e4SLinus Torvalds /* remember the open */ 24056c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 2406b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 2407b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 24081da177e4SLinus Torvalds 24091da177e4SLinus Torvalds return nfs_ok; 24101da177e4SLinus Torvalds } 24111da177e4SLinus Torvalds 24121da177e4SLinus Torvalds 24131da177e4SLinus Torvalds static void 241437515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 24151da177e4SLinus Torvalds { 24161da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 2417c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds /* 24211da177e4SLinus Torvalds * Attempt to hand out a delegation. 24221da177e4SLinus Torvalds */ 24231da177e4SLinus Torvalds static void 24241da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 24251da177e4SLinus Torvalds { 24261da177e4SLinus Torvalds struct nfs4_delegation *dp; 24271da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 24281da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 24291da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 24301da177e4SLinus Torvalds int status, flag = 0; 24311da177e4SLinus Torvalds 24321da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24337b190fecSNeilBrown open->op_recall = 0; 24347b190fecSNeilBrown switch (open->op_claim_type) { 24357b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 24367b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 24377b190fecSNeilBrown open->op_recall = 1; 24387b190fecSNeilBrown flag = open->op_delegate_type; 24397b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 24401da177e4SLinus Torvalds goto out; 24417b190fecSNeilBrown break; 24427b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 24437b190fecSNeilBrown /* Let's not give out any delegations till everyone's 24447b190fecSNeilBrown * had the chance to reclaim theirs.... */ 2445af558e33SJ. Bruce Fields if (locks_in_grace()) 24467b190fecSNeilBrown goto out; 24477b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 24487b190fecSNeilBrown goto out; 24491da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 24501da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 24511da177e4SLinus Torvalds else 24521da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 24537b190fecSNeilBrown break; 24547b190fecSNeilBrown default: 24557b190fecSNeilBrown goto out; 24567b190fecSNeilBrown } 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 24591da177e4SLinus Torvalds if (dp == NULL) { 24601da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24611da177e4SLinus Torvalds goto out; 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds locks_init_lock(&fl); 24641da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 24651da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 24669167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 24671da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 24681da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 24691da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 24701da177e4SLinus Torvalds fl.fl_pid = current->tgid; 24711da177e4SLinus Torvalds 2472a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 24731da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 24741da177e4SLinus Torvalds */ 24759167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 24761da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 2477c907132dSNeilBrown unhash_delegation(dp); 24781da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 24791da177e4SLinus Torvalds goto out; 24801da177e4SLinus Torvalds } 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 24831da177e4SLinus Torvalds 24841da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 24851da177e4SLinus Torvalds dp->dl_stateid.si_boot, 24861da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 24871da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 24881da177e4SLinus Torvalds dp->dl_stateid.si_generation); 24891da177e4SLinus Torvalds out: 24907b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 24917b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 24927b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 24932fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 24941da177e4SLinus Torvalds open->op_delegate_type = flag; 24951da177e4SLinus Torvalds } 24961da177e4SLinus Torvalds 24971da177e4SLinus Torvalds /* 24981da177e4SLinus Torvalds * called with nfs4_lock_state() held. 24991da177e4SLinus Torvalds */ 2500b37ad28bSAl Viro __be32 25011da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 25021da177e4SLinus Torvalds { 25036668958fSAndy Adamson struct nfsd4_compoundres *resp = rqstp->rq_resp; 25041da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 25051da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 25061da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 2507567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 2508b37ad28bSAl Viro __be32 status; 25091da177e4SLinus Torvalds 25101da177e4SLinus Torvalds status = nfserr_inval; 2511d87a8adeSAndy Adamson if (!access_valid(open->op_share_access, resp->cstate.minorversion) 2512ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 25131da177e4SLinus Torvalds goto out; 25141da177e4SLinus Torvalds /* 25151da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 25161da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 25171da177e4SLinus Torvalds * If not found, create the nfs4_file struct 25181da177e4SLinus Torvalds */ 25191da177e4SLinus Torvalds fp = find_file(ino); 25201da177e4SLinus Torvalds if (fp) { 25211da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 25221da177e4SLinus Torvalds goto out; 2523c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 2524c44c5eebSNeilBrown if (status) 2525c44c5eebSNeilBrown goto out; 25261da177e4SLinus Torvalds } else { 2527c44c5eebSNeilBrown status = nfserr_bad_stateid; 2528c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 2529c44c5eebSNeilBrown goto out; 25301da177e4SLinus Torvalds status = nfserr_resource; 25311da177e4SLinus Torvalds fp = alloc_init_file(ino); 25321da177e4SLinus Torvalds if (fp == NULL) 25331da177e4SLinus Torvalds goto out; 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds /* 25371da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 25381da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 25391da177e4SLinus Torvalds */ 25401da177e4SLinus Torvalds if (stp) { 25411da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 25421da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 25431da177e4SLinus Torvalds if (status) 25441da177e4SLinus Torvalds goto out; 2545444c2c07SNeilBrown update_stateid(&stp->st_stateid); 25461da177e4SLinus Torvalds } else { 25471da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 25481da177e4SLinus Torvalds int flags = 0; 25499ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 25508837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 25511da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 25528837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 2553567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 2554567d9829SNeilBrown if (status) 25551da177e4SLinus Torvalds goto out; 25561da177e4SLinus Torvalds init_stateid(stp, fp, open); 25571da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 25581da177e4SLinus Torvalds if (status) { 25592283963fSJ. Bruce Fields release_open_stateid(stp); 25601da177e4SLinus Torvalds goto out; 25611da177e4SLinus Torvalds } 25626668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 25636668958fSAndy Adamson update_stateid(&stp->st_stateid); 25641da177e4SLinus Torvalds } 25651da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 25661da177e4SLinus Torvalds 25676668958fSAndy Adamson if (nfsd4_has_session(&resp->cstate)) 25686668958fSAndy Adamson open->op_stateowner->so_confirmed = 1; 25696668958fSAndy Adamson 25701da177e4SLinus Torvalds /* 25711da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 25721da177e4SLinus Torvalds * OPEN succeeds even if we fail. 25731da177e4SLinus Torvalds */ 25741da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 25751da177e4SLinus Torvalds 25761da177e4SLinus Torvalds status = nfs_ok; 25771da177e4SLinus Torvalds 25781da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 25791da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 25801da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 25811da177e4SLinus Torvalds out: 258213cd2184SNeilBrown if (fp) 258313cd2184SNeilBrown put_nfs4_file(fp); 258437515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 258537515177SNeilBrown nfs4_set_claim_prev(open); 25861da177e4SLinus Torvalds /* 25871da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 25881da177e4SLinus Torvalds */ 25891da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 25906668958fSAndy Adamson if (!open->op_stateowner->so_confirmed && 25916668958fSAndy Adamson !nfsd4_has_session(&resp->cstate)) 25921da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 25931da177e4SLinus Torvalds 25941da177e4SLinus Torvalds return status; 25951da177e4SLinus Torvalds } 25961da177e4SLinus Torvalds 2597b37ad28bSAl Viro __be32 2598b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2599b591480bSJ.Bruce Fields clientid_t *clid) 26001da177e4SLinus Torvalds { 26011da177e4SLinus Torvalds struct nfs4_client *clp; 2602b37ad28bSAl Viro __be32 status; 26031da177e4SLinus Torvalds 26041da177e4SLinus Torvalds nfs4_lock_state(); 26051da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 26061da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 26071da177e4SLinus Torvalds status = nfserr_stale_clientid; 26081da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 26091da177e4SLinus Torvalds goto out; 26101da177e4SLinus Torvalds clp = find_confirmed_client(clid); 26111da177e4SLinus Torvalds status = nfserr_expired; 26121da177e4SLinus Torvalds if (clp == NULL) { 26131da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 26141da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 26151da177e4SLinus Torvalds goto out; 26161da177e4SLinus Torvalds } 26171da177e4SLinus Torvalds renew_client(clp); 26181da177e4SLinus Torvalds status = nfserr_cb_path_down; 2619ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 26201da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 26211da177e4SLinus Torvalds goto out; 26221da177e4SLinus Torvalds status = nfs_ok; 26231da177e4SLinus Torvalds out: 26241da177e4SLinus Torvalds nfs4_unlock_state(); 26251da177e4SLinus Torvalds return status; 26261da177e4SLinus Torvalds } 26271da177e4SLinus Torvalds 2628af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 2629af558e33SJ. Bruce Fields }; 2630af558e33SJ. Bruce Fields 2631a76b4319SNeilBrown static void 2632af558e33SJ. Bruce Fields nfsd4_end_grace(void) 2633a76b4319SNeilBrown { 2634a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 2635c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 2636af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 2637a76b4319SNeilBrown } 2638a76b4319SNeilBrown 2639fd39ca9aSNeilBrown static time_t 26401da177e4SLinus Torvalds nfs4_laundromat(void) 26411da177e4SLinus Torvalds { 26421da177e4SLinus Torvalds struct nfs4_client *clp; 26431da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26441da177e4SLinus Torvalds struct nfs4_delegation *dp; 26451da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 26461da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 26471da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 26481da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 26491da177e4SLinus Torvalds 26501da177e4SLinus Torvalds nfs4_lock_state(); 26511da177e4SLinus Torvalds 26521da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 2653af558e33SJ. Bruce Fields if (locks_in_grace()) 2654af558e33SJ. Bruce Fields nfsd4_end_grace(); 26551da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 26561da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 26571da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 26581da177e4SLinus Torvalds t = clp->cl_time - cutoff; 26591da177e4SLinus Torvalds if (clientid_val > t) 26601da177e4SLinus Torvalds clientid_val = t; 26611da177e4SLinus Torvalds break; 26621da177e4SLinus Torvalds } 26631da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 26641da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2665c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 26661da177e4SLinus Torvalds expire_client(clp); 26671da177e4SLinus Torvalds } 26681da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 26691da177e4SLinus Torvalds spin_lock(&recall_lock); 26701da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 26711da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 26721da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 26731da177e4SLinus Torvalds u = dp->dl_time - cutoff; 26741da177e4SLinus Torvalds if (test_val > u) 26751da177e4SLinus Torvalds test_val = u; 26761da177e4SLinus Torvalds break; 26771da177e4SLinus Torvalds } 26781da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 26791da177e4SLinus Torvalds dp, dp->dl_flock); 26801da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 26811da177e4SLinus Torvalds } 26821da177e4SLinus Torvalds spin_unlock(&recall_lock); 26831da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 26841da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 26851da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 26861da177e4SLinus Torvalds unhash_delegation(dp); 26871da177e4SLinus Torvalds } 26881da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 26891da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 26901da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 26911da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 26921da177e4SLinus Torvalds u = sop->so_time - cutoff; 26931da177e4SLinus Torvalds if (test_val > u) 26941da177e4SLinus Torvalds test_val = u; 26951da177e4SLinus Torvalds break; 26961da177e4SLinus Torvalds } 26971da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 26981da177e4SLinus Torvalds sop->so_id); 2699f044ff83SJ. Bruce Fields release_openowner(sop); 27001da177e4SLinus Torvalds } 27011da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 27021da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 27031da177e4SLinus Torvalds nfs4_unlock_state(); 27041da177e4SLinus Torvalds return clientid_val; 27051da177e4SLinus Torvalds } 27061da177e4SLinus Torvalds 2707a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 2708a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 2709a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 2710a254b246SHarvey Harrison 2711a254b246SHarvey Harrison static void 2712c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 27131da177e4SLinus Torvalds { 27141da177e4SLinus Torvalds time_t t; 27151da177e4SLinus Torvalds 27161da177e4SLinus Torvalds t = nfs4_laundromat(); 27171da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 271858da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 27191da177e4SLinus Torvalds } 27201da177e4SLinus Torvalds 2721fd39ca9aSNeilBrown static struct nfs4_stateowner * 2722f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 2723f8816512SNeilBrown { 27241da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 27251da177e4SLinus Torvalds 27261da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 27271da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 27281da177e4SLinus Torvalds if (local->so_id == st_id) 27291da177e4SLinus Torvalds return local; 27301da177e4SLinus Torvalds } 27311da177e4SLinus Torvalds } 27321da177e4SLinus Torvalds return NULL; 27331da177e4SLinus Torvalds } 27341da177e4SLinus Torvalds 27351da177e4SLinus Torvalds static inline int 27361da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 27371da177e4SLinus Torvalds { 27387eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 27391da177e4SLinus Torvalds } 27401da177e4SLinus Torvalds 27411da177e4SLinus Torvalds static int 27421da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 27431da177e4SLinus Torvalds { 274478155ed7SBian Naimeng if (time_after((unsigned long)boot_time, 274578155ed7SBian Naimeng (unsigned long)stateid->si_boot)) { 2746849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 274778155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 274878155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 27491da177e4SLinus Torvalds return 1; 27501da177e4SLinus Torvalds } 275178155ed7SBian Naimeng return 0; 275278155ed7SBian Naimeng } 275378155ed7SBian Naimeng 275478155ed7SBian Naimeng static int 275578155ed7SBian Naimeng EXPIRED_STATEID(stateid_t *stateid) 275678155ed7SBian Naimeng { 275778155ed7SBian Naimeng if (time_before((unsigned long)boot_time, 275878155ed7SBian Naimeng ((unsigned long)stateid->si_boot)) && 2759b8fd47aeSJ. Bruce Fields time_before((unsigned long)(stateid->si_boot + lease_time), get_seconds())) { 276078155ed7SBian Naimeng dprintk("NFSD: expired stateid (%08x/%08x/%08x/%08x)!\n", 276178155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 276278155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 276378155ed7SBian Naimeng return 1; 276478155ed7SBian Naimeng } 276578155ed7SBian Naimeng return 0; 276678155ed7SBian Naimeng } 276778155ed7SBian Naimeng 276878155ed7SBian Naimeng static __be32 276978155ed7SBian Naimeng stateid_error_map(stateid_t *stateid) 277078155ed7SBian Naimeng { 277178155ed7SBian Naimeng if (STALE_STATEID(stateid)) 277278155ed7SBian Naimeng return nfserr_stale_stateid; 277378155ed7SBian Naimeng if (EXPIRED_STATEID(stateid)) 277478155ed7SBian Naimeng return nfserr_expired; 277578155ed7SBian Naimeng 277678155ed7SBian Naimeng dprintk("NFSD: bad stateid (%08x/%08x/%08x/%08x)!\n", 277778155ed7SBian Naimeng stateid->si_boot, stateid->si_stateownerid, 277878155ed7SBian Naimeng stateid->si_fileid, stateid->si_generation); 277978155ed7SBian Naimeng return nfserr_bad_stateid; 278078155ed7SBian Naimeng } 27811da177e4SLinus Torvalds 27821da177e4SLinus Torvalds static inline int 27831da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 27841da177e4SLinus Torvalds { 27851da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 27861da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 27871da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 27881da177e4SLinus Torvalds } 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds static inline int 27911da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 27921da177e4SLinus Torvalds { 27931da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 27941da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 27951da177e4SLinus Torvalds } 27961da177e4SLinus Torvalds 27971da177e4SLinus Torvalds static 2798b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 27991da177e4SLinus Torvalds { 2800b37ad28bSAl Viro __be32 status = nfserr_openmode; 28011da177e4SLinus Torvalds 28021da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 28031da177e4SLinus Torvalds goto out; 28041da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 28051da177e4SLinus Torvalds goto out; 28061da177e4SLinus Torvalds status = nfs_ok; 28071da177e4SLinus Torvalds out: 28081da177e4SLinus Torvalds return status; 28091da177e4SLinus Torvalds } 28101da177e4SLinus Torvalds 2811b37ad28bSAl Viro static inline __be32 28121da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 28131da177e4SLinus Torvalds { 2814203a8c8eSJ. Bruce Fields if (ONE_STATEID(stateid) && (flags & RD_STATE)) 28151da177e4SLinus Torvalds return nfs_ok; 2816af558e33SJ. Bruce Fields else if (locks_in_grace()) { 28171da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 28181da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 28191da177e4SLinus Torvalds return nfserr_grace; 28201da177e4SLinus Torvalds } else if (flags & WR_STATE) 28211da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 28221da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 28231da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 28241da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 28251da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 28261da177e4SLinus Torvalds } 28271da177e4SLinus Torvalds 28281da177e4SLinus Torvalds /* 28291da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 28301da177e4SLinus Torvalds * that are not able to provide mandatory locking. 28311da177e4SLinus Torvalds */ 28321da177e4SLinus Torvalds static inline int 283318f82731SJ. Bruce Fields grace_disallows_io(struct inode *inode) 28341da177e4SLinus Torvalds { 2835203a8c8eSJ. Bruce Fields return locks_in_grace() && mandatory_lock(inode); 28361da177e4SLinus Torvalds } 28371da177e4SLinus Torvalds 28386668958fSAndy Adamson static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) 28390836f587SJ. Bruce Fields { 28406668958fSAndy Adamson /* 28416668958fSAndy Adamson * When sessions are used the stateid generation number is ignored 28426668958fSAndy Adamson * when it is zero. 28436668958fSAndy Adamson */ 28446668958fSAndy Adamson if ((flags & HAS_SESSION) && in->si_generation == 0) 28456668958fSAndy Adamson goto out; 28466668958fSAndy Adamson 28470836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 28480836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 28490836f587SJ. Bruce Fields return nfserr_bad_stateid; 28500836f587SJ. Bruce Fields /* 28510836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 28520836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 28530836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 28540836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 28550836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 28560836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 28570836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 28580836f587SJ. Bruce Fields * will just have to retry the IO: 28590836f587SJ. Bruce Fields */ 28600836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 28610836f587SJ. Bruce Fields return nfserr_old_stateid; 28626668958fSAndy Adamson out: 28630836f587SJ. Bruce Fields return nfs_ok; 28640836f587SJ. Bruce Fields } 28650836f587SJ. Bruce Fields 28663e633079SJ. Bruce Fields static int is_delegation_stateid(stateid_t *stateid) 28673e633079SJ. Bruce Fields { 28683e633079SJ. Bruce Fields return stateid->si_fileid == 0; 28693e633079SJ. Bruce Fields } 28703e633079SJ. Bruce Fields 28711da177e4SLinus Torvalds /* 28721da177e4SLinus Torvalds * Checks for stateid operations 28731da177e4SLinus Torvalds */ 2874b37ad28bSAl Viro __be32 2875dd453dfdSBenny Halevy nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, 2876dd453dfdSBenny Halevy stateid_t *stateid, int flags, struct file **filpp) 28771da177e4SLinus Torvalds { 28781da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 28791da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 2880dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 28811da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2882b37ad28bSAl Viro __be32 status; 28831da177e4SLinus Torvalds 28841da177e4SLinus Torvalds if (filpp) 28851da177e4SLinus Torvalds *filpp = NULL; 28861da177e4SLinus Torvalds 288718f82731SJ. Bruce Fields if (grace_disallows_io(ino)) 28881da177e4SLinus Torvalds return nfserr_grace; 28891da177e4SLinus Torvalds 28906668958fSAndy Adamson if (nfsd4_has_session(cstate)) 28916668958fSAndy Adamson flags |= HAS_SESSION; 28926668958fSAndy Adamson 28931da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 28941da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 28951da177e4SLinus Torvalds 28961da177e4SLinus Torvalds status = nfserr_stale_stateid; 28971da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 28981da177e4SLinus Torvalds goto out; 28991da177e4SLinus Torvalds 29001da177e4SLinus Torvalds status = nfserr_bad_stateid; 29013e633079SJ. Bruce Fields if (is_delegation_stateid(stateid)) { 2902a4455be0SJ. Bruce Fields dp = find_delegation_stateid(ino, stateid); 290378155ed7SBian Naimeng if (!dp) { 290478155ed7SBian Naimeng status = stateid_error_map(stateid); 29051da177e4SLinus Torvalds goto out; 290678155ed7SBian Naimeng } 29076668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, 29086668958fSAndy Adamson flags); 29090c2a498fSJ. Bruce Fields if (status) 29100c2a498fSJ. Bruce Fields goto out; 2911dc9bf700SJ. Bruce Fields status = nfs4_check_delegmode(dp, flags); 2912dc9bf700SJ. Bruce Fields if (status) 2913dc9bf700SJ. Bruce Fields goto out; 2914dc9bf700SJ. Bruce Fields renew_client(dp->dl_client); 2915dc9bf700SJ. Bruce Fields if (filpp) 2916dc9bf700SJ. Bruce Fields *filpp = dp->dl_vfs_file; 29171da177e4SLinus Torvalds } else { /* open or lock stateid */ 2918a4455be0SJ. Bruce Fields stp = find_stateid(stateid, flags); 291978155ed7SBian Naimeng if (!stp) { 292078155ed7SBian Naimeng status = stateid_error_map(stateid); 29211da177e4SLinus Torvalds goto out; 292278155ed7SBian Naimeng } 29236150ef0dSJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) 29241da177e4SLinus Torvalds goto out; 29251da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 29261da177e4SLinus Torvalds goto out; 29276668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, 29286668958fSAndy Adamson flags); 29290836f587SJ. Bruce Fields if (status) 29301da177e4SLinus Torvalds goto out; 2931a4455be0SJ. Bruce Fields status = nfs4_check_openmode(stp, flags); 2932a4455be0SJ. Bruce Fields if (status) 29331da177e4SLinus Torvalds goto out; 29341da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 29351da177e4SLinus Torvalds if (filpp) 29361da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 29371da177e4SLinus Torvalds } 29381da177e4SLinus Torvalds status = nfs_ok; 29391da177e4SLinus Torvalds out: 29401da177e4SLinus Torvalds return status; 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds 29434c4cd222SNeilBrown static inline int 29444c4cd222SNeilBrown setlkflg (int type) 29454c4cd222SNeilBrown { 29464c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 29474c4cd222SNeilBrown RD_STATE : WR_STATE; 29484c4cd222SNeilBrown } 29491da177e4SLinus Torvalds 29501da177e4SLinus Torvalds /* 29511da177e4SLinus Torvalds * Checks for sequence id mutating operations. 29521da177e4SLinus Torvalds */ 2953b37ad28bSAl Viro static __be32 2954dd453dfdSBenny Halevy nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, 2955dd453dfdSBenny Halevy stateid_t *stateid, int flags, 2956dd453dfdSBenny Halevy struct nfs4_stateowner **sopp, 2957dd453dfdSBenny Halevy struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 29581da177e4SLinus Torvalds { 29591da177e4SLinus Torvalds struct nfs4_stateid *stp; 29601da177e4SLinus Torvalds struct nfs4_stateowner *sop; 2961dd453dfdSBenny Halevy struct svc_fh *current_fh = &cstate->current_fh; 29620836f587SJ. Bruce Fields __be32 status; 29631da177e4SLinus Torvalds 29641da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 29651da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 29661da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 29671da177e4SLinus Torvalds stateid->si_generation); 29681da177e4SLinus Torvalds 29691da177e4SLinus Torvalds *stpp = NULL; 29701da177e4SLinus Torvalds *sopp = NULL; 29711da177e4SLinus Torvalds 29721da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 29732fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 29743a4f98bbSNeilBrown return nfserr_bad_stateid; 29751da177e4SLinus Torvalds } 29761da177e4SLinus Torvalds 29771da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 29783a4f98bbSNeilBrown return nfserr_stale_stateid; 29796668958fSAndy Adamson 29806668958fSAndy Adamson if (nfsd4_has_session(cstate)) 29816668958fSAndy Adamson flags |= HAS_SESSION; 29826668958fSAndy Adamson 29831da177e4SLinus Torvalds /* 29841da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 29851da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 29861da177e4SLinus Torvalds * number is incorrect. 29871da177e4SLinus Torvalds */ 2988f8816512SNeilBrown stp = find_stateid(stateid, flags); 2989f8816512SNeilBrown if (stp == NULL) { 2990f8816512SNeilBrown /* 2991f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2992f8816512SNeilBrown * a replayed close: 2993f8816512SNeilBrown */ 2994f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2995f8816512SNeilBrown if (sop == NULL) 299678155ed7SBian Naimeng return stateid_error_map(stateid); 2997f8816512SNeilBrown *sopp = sop; 2998f8816512SNeilBrown goto check_replay; 2999f8816512SNeilBrown } 30001da177e4SLinus Torvalds 300139325bd0SJ. Bruce Fields *stpp = stp; 300239325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 300339325bd0SJ. Bruce Fields 30044c4cd222SNeilBrown if (lock) { 30054c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 30061da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 30074c4cd222SNeilBrown int lkflg = 0; 3008b37ad28bSAl Viro __be32 status; 30091da177e4SLinus Torvalds 30104c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 30114c4cd222SNeilBrown 30124c4cd222SNeilBrown if (lock->lk_is_new) { 30131da177e4SLinus Torvalds if (!sop->so_is_open_owner) 30143a4f98bbSNeilBrown return nfserr_bad_stateid; 301560adfc50SAndy Adamson if (!(flags & HAS_SESSION) && 301660adfc50SAndy Adamson !same_clid(&clp->cl_clientid, lockclid)) 30173a4f98bbSNeilBrown return nfserr_bad_stateid; 30184c4cd222SNeilBrown /* stp is the open stateid */ 30194c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 30204c4cd222SNeilBrown if (status) 30214c4cd222SNeilBrown return status; 30224c4cd222SNeilBrown } else { 30234c4cd222SNeilBrown /* stp is the lock stateid */ 30244c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 30254c4cd222SNeilBrown if (status) 30264c4cd222SNeilBrown return status; 30274c4cd222SNeilBrown } 30281da177e4SLinus Torvalds } 30291da177e4SLinus Torvalds 3030f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 30312fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 30323a4f98bbSNeilBrown return nfserr_bad_stateid; 30331da177e4SLinus Torvalds } 30341da177e4SLinus Torvalds 30351da177e4SLinus Torvalds /* 30361da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 30371da177e4SLinus Torvalds * For the moment, we ignore the possibility of 30381da177e4SLinus Torvalds * generation number wraparound. 30391da177e4SLinus Torvalds */ 30406668958fSAndy Adamson if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) 30411da177e4SLinus Torvalds goto check_replay; 30421da177e4SLinus Torvalds 30433a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 30442fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 30453a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 30463a4f98bbSNeilBrown return nfserr_bad_stateid; 30471da177e4SLinus Torvalds } 30483a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 30492fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 30503a4f98bbSNeilBrown " confirmed yet!\n"); 30513a4f98bbSNeilBrown return nfserr_bad_stateid; 30521da177e4SLinus Torvalds } 30536668958fSAndy Adamson status = check_stateid_generation(stateid, &stp->st_stateid, flags); 30540836f587SJ. Bruce Fields if (status) 30550836f587SJ. Bruce Fields return status; 305652fd004eSNeilBrown renew_client(sop->so_client); 30573a4f98bbSNeilBrown return nfs_ok; 30581da177e4SLinus Torvalds 30591da177e4SLinus Torvalds check_replay: 3060bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 3061849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 30621da177e4SLinus Torvalds /* indicate replay to calling function */ 3063a90b061cSAl Viro return nfserr_replay_me; 30641da177e4SLinus Torvalds } 30652fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 30663a4f98bbSNeilBrown sop->so_seqid, seqid); 30673a4f98bbSNeilBrown *sopp = NULL; 30683a4f98bbSNeilBrown return nfserr_bad_seqid; 30691da177e4SLinus Torvalds } 30701da177e4SLinus Torvalds 3071b37ad28bSAl Viro __be32 3072ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3073a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 30741da177e4SLinus Torvalds { 3075b37ad28bSAl Viro __be32 status; 30761da177e4SLinus Torvalds struct nfs4_stateowner *sop; 30771da177e4SLinus Torvalds struct nfs4_stateid *stp; 30781da177e4SLinus Torvalds 30791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 3080ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3081ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 30821da177e4SLinus Torvalds 3083ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 3084a8cddc5dSJ. Bruce Fields if (status) 3085a8cddc5dSJ. Bruce Fields return status; 30861da177e4SLinus Torvalds 30871da177e4SLinus Torvalds nfs4_lock_state(); 30881da177e4SLinus Torvalds 3089dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3090ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 3091f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 30921da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 30931da177e4SLinus Torvalds goto out; 30941da177e4SLinus Torvalds 30951da177e4SLinus Torvalds sop = oc->oc_stateowner; 30961da177e4SLinus Torvalds sop->so_confirmed = 1; 30971da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 30981da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 30991da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 31001da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 31011da177e4SLinus Torvalds stp->st_stateid.si_boot, 31021da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 31031da177e4SLinus Torvalds stp->st_stateid.si_fileid, 31041da177e4SLinus Torvalds stp->st_stateid.si_generation); 3105c7b9a459SNeilBrown 3106c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 31071da177e4SLinus Torvalds out: 3108f2327d9aSNeil Brown if (oc->oc_stateowner) { 31091da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 3110a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 3111f2327d9aSNeil Brown } 31121da177e4SLinus Torvalds nfs4_unlock_state(); 31131da177e4SLinus Torvalds return status; 31141da177e4SLinus Torvalds } 31151da177e4SLinus Torvalds 31161da177e4SLinus Torvalds 31171da177e4SLinus Torvalds /* 31181da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 31191da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 31201da177e4SLinus Torvalds */ 31211da177e4SLinus Torvalds static void 31221da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 31231da177e4SLinus Torvalds { 31241da177e4SLinus Torvalds int i; 31251da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 31261da177e4SLinus Torvalds if ((i & access) != i) 31271da177e4SLinus Torvalds __clear_bit(i, bmap); 31281da177e4SLinus Torvalds } 31291da177e4SLinus Torvalds } 31301da177e4SLinus Torvalds 31311da177e4SLinus Torvalds static void 31321da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 31331da177e4SLinus Torvalds { 31341da177e4SLinus Torvalds int i; 31351da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 31361da177e4SLinus Torvalds if ((i & deny) != i) 31371da177e4SLinus Torvalds __clear_bit(i, bmap); 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds } 31401da177e4SLinus Torvalds 3141b37ad28bSAl Viro __be32 3142ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 3143ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 3144a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 31451da177e4SLinus Torvalds { 3146b37ad28bSAl Viro __be32 status; 31471da177e4SLinus Torvalds struct nfs4_stateid *stp; 31481da177e4SLinus Torvalds unsigned int share_access; 31491da177e4SLinus Torvalds 31501da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 3151ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3152ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 31531da177e4SLinus Torvalds 3154d87a8adeSAndy Adamson if (!access_valid(od->od_share_access, cstate->minorversion) 3155ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 31561da177e4SLinus Torvalds return nfserr_inval; 31571da177e4SLinus Torvalds 31581da177e4SLinus Torvalds nfs4_lock_state(); 3159dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3160ca364317SJ.Bruce Fields od->od_seqid, 31611da177e4SLinus Torvalds &od->od_stateid, 3162f3362737SJ. Bruce Fields OPEN_STATE, 31631da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 31641da177e4SLinus Torvalds goto out; 31651da177e4SLinus Torvalds 31661da177e4SLinus Torvalds status = nfserr_inval; 31671da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 31681da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 31691da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 31701da177e4SLinus Torvalds goto out; 31711da177e4SLinus Torvalds } 31721da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 31731da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 31741da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 31751da177e4SLinus Torvalds goto out; 31761da177e4SLinus Torvalds } 31771da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 31781da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 31791da177e4SLinus Torvalds share_access & ~od->od_share_access); 31801da177e4SLinus Torvalds 31811da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 31821da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 31831da177e4SLinus Torvalds 31841da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 31851da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 31861da177e4SLinus Torvalds status = nfs_ok; 31871da177e4SLinus Torvalds out: 3188f2327d9aSNeil Brown if (od->od_stateowner) { 31891da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 3190a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 3191f2327d9aSNeil Brown } 31921da177e4SLinus Torvalds nfs4_unlock_state(); 31931da177e4SLinus Torvalds return status; 31941da177e4SLinus Torvalds } 31951da177e4SLinus Torvalds 31961da177e4SLinus Torvalds /* 31971da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 31981da177e4SLinus Torvalds */ 3199b37ad28bSAl Viro __be32 3200ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3201a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 32021da177e4SLinus Torvalds { 3203b37ad28bSAl Viro __be32 status; 32041da177e4SLinus Torvalds struct nfs4_stateid *stp; 32051da177e4SLinus Torvalds 32061da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 3207ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 3208ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 32091da177e4SLinus Torvalds 32101da177e4SLinus Torvalds nfs4_lock_state(); 32111da177e4SLinus Torvalds /* check close_lru for replay */ 3212dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 3213ca364317SJ.Bruce Fields close->cl_seqid, 32141da177e4SLinus Torvalds &close->cl_stateid, 3215f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 32161da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 32171da177e4SLinus Torvalds goto out; 32181da177e4SLinus Torvalds status = nfs_ok; 32191da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 32201da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 32211da177e4SLinus Torvalds 322204ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 32232283963fSJ. Bruce Fields release_open_stateid(stp); 322404ef5954SJ. Bruce Fields 322504ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 322604ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 322704ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 322804ef5954SJ. Bruce Fields */ 322904ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 323004ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 32311da177e4SLinus Torvalds out: 3232f2327d9aSNeil Brown if (close->cl_stateowner) { 32331da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 3234a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 3235f2327d9aSNeil Brown } 32361da177e4SLinus Torvalds nfs4_unlock_state(); 32371da177e4SLinus Torvalds return status; 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds 3240b37ad28bSAl Viro __be32 3241ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3242ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 32431da177e4SLinus Torvalds { 3244203a8c8eSJ. Bruce Fields struct nfs4_delegation *dp; 3245203a8c8eSJ. Bruce Fields stateid_t *stateid = &dr->dr_stateid; 3246203a8c8eSJ. Bruce Fields struct inode *inode; 3247b37ad28bSAl Viro __be32 status; 32486668958fSAndy Adamson int flags = 0; 32491da177e4SLinus Torvalds 3250ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 3251203a8c8eSJ. Bruce Fields return status; 3252203a8c8eSJ. Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 32531da177e4SLinus Torvalds 32546668958fSAndy Adamson if (nfsd4_has_session(cstate)) 32556668958fSAndy Adamson flags |= HAS_SESSION; 32561da177e4SLinus Torvalds nfs4_lock_state(); 3257203a8c8eSJ. Bruce Fields status = nfserr_bad_stateid; 3258203a8c8eSJ. Bruce Fields if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 3259203a8c8eSJ. Bruce Fields goto out; 3260203a8c8eSJ. Bruce Fields status = nfserr_stale_stateid; 3261203a8c8eSJ. Bruce Fields if (STALE_STATEID(stateid)) 3262203a8c8eSJ. Bruce Fields goto out; 32637e0f7cf5SJ. Bruce Fields status = nfserr_bad_stateid; 3264203a8c8eSJ. Bruce Fields if (!is_delegation_stateid(stateid)) 3265203a8c8eSJ. Bruce Fields goto out; 3266203a8c8eSJ. Bruce Fields dp = find_delegation_stateid(inode, stateid); 326778155ed7SBian Naimeng if (!dp) { 326878155ed7SBian Naimeng status = stateid_error_map(stateid); 3269203a8c8eSJ. Bruce Fields goto out; 327078155ed7SBian Naimeng } 32716668958fSAndy Adamson status = check_stateid_generation(stateid, &dp->dl_stateid, flags); 3272203a8c8eSJ. Bruce Fields if (status) 3273203a8c8eSJ. Bruce Fields goto out; 3274203a8c8eSJ. Bruce Fields renew_client(dp->dl_client); 3275203a8c8eSJ. Bruce Fields 3276203a8c8eSJ. Bruce Fields unhash_delegation(dp); 32771da177e4SLinus Torvalds out: 3278203a8c8eSJ. Bruce Fields nfs4_unlock_state(); 3279203a8c8eSJ. Bruce Fields 32801da177e4SLinus Torvalds return status; 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds 32831da177e4SLinus Torvalds 32841da177e4SLinus Torvalds /* 32851da177e4SLinus Torvalds * Lock owner state (byte-range locks) 32861da177e4SLinus Torvalds */ 32871da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 32881da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 32891da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 32901da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 32911da177e4SLinus Torvalds 329287df4de8SBenny Halevy static inline u64 329387df4de8SBenny Halevy end_offset(u64 start, u64 len) 329487df4de8SBenny Halevy { 329587df4de8SBenny Halevy u64 end; 329687df4de8SBenny Halevy 329787df4de8SBenny Halevy end = start + len; 329887df4de8SBenny Halevy return end >= start ? end: NFS4_MAX_UINT64; 329987df4de8SBenny Halevy } 330087df4de8SBenny Halevy 330187df4de8SBenny Halevy /* last octet in a range */ 330287df4de8SBenny Halevy static inline u64 330387df4de8SBenny Halevy last_byte_offset(u64 start, u64 len) 330487df4de8SBenny Halevy { 330587df4de8SBenny Halevy u64 end; 330687df4de8SBenny Halevy 330787df4de8SBenny Halevy BUG_ON(!len); 330887df4de8SBenny Halevy end = start + len; 330987df4de8SBenny Halevy return end > start ? end - 1: NFS4_MAX_UINT64; 331087df4de8SBenny Halevy } 331187df4de8SBenny Halevy 33121da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 33131da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 33141da177e4SLinus Torvalds 33151da177e4SLinus Torvalds static inline unsigned int 33161da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 33171da177e4SLinus Torvalds struct xdr_netobj *ownername) 33181da177e4SLinus Torvalds { 33191da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 33201da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 33211da177e4SLinus Torvalds & LOCK_HASH_MASK; 33221da177e4SLinus Torvalds } 33231da177e4SLinus Torvalds 33241da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 33251da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 33261da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 33271da177e4SLinus Torvalds 3328fd39ca9aSNeilBrown static struct nfs4_stateid * 33291da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 33301da177e4SLinus Torvalds { 33319346eff0SKrishna Kumar struct nfs4_stateid *local; 33321da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 33331da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 33341da177e4SLinus Torvalds unsigned int hashval; 33351da177e4SLinus Torvalds 33361da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 33379346eff0SKrishna Kumar if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { 33381da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 33391da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 33401da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 33411da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 33421da177e4SLinus Torvalds return local; 33431da177e4SLinus Torvalds } 33441da177e4SLinus Torvalds } 33459346eff0SKrishna Kumar 33469346eff0SKrishna Kumar if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { 33471da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 33481da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 33491da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 33501da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 33511da177e4SLinus Torvalds return local; 33521da177e4SLinus Torvalds } 3353849823c5SNeil Brown } 33541da177e4SLinus Torvalds return NULL; 33551da177e4SLinus Torvalds } 33561da177e4SLinus Torvalds 33571da177e4SLinus Torvalds static struct nfs4_delegation * 33581da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 33591da177e4SLinus Torvalds { 336013cd2184SNeilBrown struct nfs4_file *fp; 336113cd2184SNeilBrown struct nfs4_delegation *dl; 33621da177e4SLinus Torvalds 33631da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 33641da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 33651da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 33661da177e4SLinus Torvalds 33671da177e4SLinus Torvalds fp = find_file(ino); 336813cd2184SNeilBrown if (!fp) 33691da177e4SLinus Torvalds return NULL; 337013cd2184SNeilBrown dl = find_delegation_file(fp, stid); 337113cd2184SNeilBrown put_nfs4_file(fp); 337213cd2184SNeilBrown return dl; 33731da177e4SLinus Torvalds } 33741da177e4SLinus Torvalds 33751da177e4SLinus Torvalds /* 33761da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 33771da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 33781da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 33791da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 33801da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 33811da177e4SLinus Torvalds * the VFS, but this is a very deep change! 33821da177e4SLinus Torvalds */ 33831da177e4SLinus Torvalds static inline void 33841da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 33851da177e4SLinus Torvalds { 33861da177e4SLinus Torvalds if (lock->fl_start < 0) 33871da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 33881da177e4SLinus Torvalds if (lock->fl_end < 0) 33891da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 33901da177e4SLinus Torvalds } 33911da177e4SLinus Torvalds 3392d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 3393d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 3394e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 3395d5b9026aSNeilBrown }; 33961da177e4SLinus Torvalds 33971da177e4SLinus Torvalds static inline void 33981da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 33991da177e4SLinus Torvalds { 3400d5b9026aSNeilBrown struct nfs4_stateowner *sop; 3401d5b9026aSNeilBrown unsigned int hval; 34021da177e4SLinus Torvalds 3403d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 3404d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 3405d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 34061da177e4SLinus Torvalds kref_get(&sop->so_ref); 34071da177e4SLinus Torvalds deny->ld_sop = sop; 34081da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 3409d5b9026aSNeilBrown } else { 3410d5b9026aSNeilBrown deny->ld_sop = NULL; 3411d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 3412d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 34131da177e4SLinus Torvalds } 34141da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 341587df4de8SBenny Halevy deny->ld_length = NFS4_MAX_UINT64; 341687df4de8SBenny Halevy if (fl->fl_end != NFS4_MAX_UINT64) 34171da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 34181da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 34191da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 34201da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 34211da177e4SLinus Torvalds } 34221da177e4SLinus Torvalds 34231da177e4SLinus Torvalds static struct nfs4_stateowner * 34241da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 34251da177e4SLinus Torvalds struct xdr_netobj *owner) 34261da177e4SLinus Torvalds { 34271da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 34281da177e4SLinus Torvalds struct nfs4_stateowner *op; 34291da177e4SLinus Torvalds 34301da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 3431599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 34321da177e4SLinus Torvalds return op; 34331da177e4SLinus Torvalds } 34341da177e4SLinus Torvalds return NULL; 34351da177e4SLinus Torvalds } 34361da177e4SLinus Torvalds 34371da177e4SLinus Torvalds /* 34381da177e4SLinus Torvalds * Alloc a lock owner structure. 34391da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 34401da177e4SLinus Torvalds * occured. 34411da177e4SLinus Torvalds * 34421da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 34431da177e4SLinus Torvalds */ 34441da177e4SLinus Torvalds 34451da177e4SLinus Torvalds static struct nfs4_stateowner * 34461da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 34471da177e4SLinus Torvalds struct nfs4_stateowner *sop; 34481da177e4SLinus Torvalds struct nfs4_replay *rp; 34491da177e4SLinus Torvalds unsigned int idhashval; 34501da177e4SLinus Torvalds 34511da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 34521da177e4SLinus Torvalds return NULL; 34531da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 34541da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 34551da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 34561da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 3457ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 3458ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 34591da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 34601da177e4SLinus Torvalds sop->so_time = 0; 34611da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 34621da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 3463ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 34641da177e4SLinus Torvalds sop->so_is_open_owner = 0; 34651da177e4SLinus Torvalds sop->so_id = current_ownerid++; 34661da177e4SLinus Torvalds sop->so_client = clp; 3467b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 3468b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 3469b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 34701da177e4SLinus Torvalds sop->so_confirmed = 1; 34711da177e4SLinus Torvalds rp = &sop->so_replay; 3472de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 34731da177e4SLinus Torvalds rp->rp_buflen = 0; 34741da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 34751da177e4SLinus Torvalds return sop; 34761da177e4SLinus Torvalds } 34771da177e4SLinus Torvalds 3478fd39ca9aSNeilBrown static struct nfs4_stateid * 34791da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 34801da177e4SLinus Torvalds { 34811da177e4SLinus Torvalds struct nfs4_stateid *stp; 34821da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 34831da177e4SLinus Torvalds 34845ac049acSNeilBrown stp = nfs4_alloc_stateid(); 34855ac049acSNeilBrown if (stp == NULL) 34861da177e4SLinus Torvalds goto out; 34871da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 34881da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 3489ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 3490ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 34911da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 34928beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 3493ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 34941da177e4SLinus Torvalds stp->st_stateowner = sop; 349513cd2184SNeilBrown get_nfs4_file(fp); 34961da177e4SLinus Torvalds stp->st_file = fp; 349778155ed7SBian Naimeng stp->st_stateid.si_boot = get_seconds(); 34981da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 34991da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 35001da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 35011da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 35021da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 35031da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 35044c4cd222SNeilBrown stp->st_openstp = open_stp; 35051da177e4SLinus Torvalds 35061da177e4SLinus Torvalds out: 35071da177e4SLinus Torvalds return stp; 35081da177e4SLinus Torvalds } 35091da177e4SLinus Torvalds 3510fd39ca9aSNeilBrown static int 35111da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 35121da177e4SLinus Torvalds { 351387df4de8SBenny Halevy return ((length == 0) || ((length != NFS4_MAX_UINT64) && 35141da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 35151da177e4SLinus Torvalds } 35161da177e4SLinus Torvalds 35171da177e4SLinus Torvalds /* 35181da177e4SLinus Torvalds * LOCK operation 35191da177e4SLinus Torvalds */ 3520b37ad28bSAl Viro __be32 3521ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3522a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 35231da177e4SLinus Torvalds { 35243e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 3525b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 35261da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 35271da177e4SLinus Torvalds struct file *filp; 35281da177e4SLinus Torvalds struct file_lock file_lock; 35298dc7c311SAndy Adamson struct file_lock conflock; 3530b37ad28bSAl Viro __be32 status = 0; 35311da177e4SLinus Torvalds unsigned int strhashval; 3532150b3934SMarc Eshel unsigned int cmd; 3533b8dd7b9aSAl Viro int err; 35341da177e4SLinus Torvalds 35351da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 35361da177e4SLinus Torvalds (long long) lock->lk_offset, 35371da177e4SLinus Torvalds (long long) lock->lk_length); 35381da177e4SLinus Torvalds 35391da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 35401da177e4SLinus Torvalds return nfserr_inval; 35411da177e4SLinus Torvalds 3542ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 35438837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 3544a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 3545a6f6ef2fSAndy Adamson return status; 3546a6f6ef2fSAndy Adamson } 3547a6f6ef2fSAndy Adamson 35481da177e4SLinus Torvalds nfs4_lock_state(); 35491da177e4SLinus Torvalds 35501da177e4SLinus Torvalds if (lock->lk_is_new) { 35511da177e4SLinus Torvalds /* 35521da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 3553893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 3554893f8770SNeilBrown * lock stateid. 35551da177e4SLinus Torvalds */ 35561da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 35571da177e4SLinus Torvalds struct nfs4_file *fp; 35581da177e4SLinus Torvalds 35591da177e4SLinus Torvalds status = nfserr_stale_clientid; 356060adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && 356160adfc50SAndy Adamson STALE_CLIENTID(&lock->lk_new_clientid)) 35621da177e4SLinus Torvalds goto out; 35631da177e4SLinus Torvalds 35641da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 3565dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 35661da177e4SLinus Torvalds lock->lk_new_open_seqid, 35671da177e4SLinus Torvalds &lock->lk_new_open_stateid, 3568f3362737SJ. Bruce Fields OPEN_STATE, 35693a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 3570b59e3c0eSNeil Brown lock); 357137515177SNeilBrown if (status) 35721da177e4SLinus Torvalds goto out; 35733a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 35741da177e4SLinus Torvalds /* create lockowner and lock stateid */ 35751da177e4SLinus Torvalds fp = open_stp->st_file; 35761da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 35771da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 35781da177e4SLinus Torvalds &lock->v.new.owner); 35793e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 35803e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 35813e9e3dbeSNeilBrown * create new stateids)? */ 35821da177e4SLinus Torvalds status = nfserr_resource; 3583b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 3584b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 3585b59e3c0eSNeil Brown if (lock_sop == NULL) 35861da177e4SLinus Torvalds goto out; 3587b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 35888a280510SJ. Bruce Fields if (lock_stp == NULL) 35891da177e4SLinus Torvalds goto out; 35901da177e4SLinus Torvalds } else { 35911da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 3592dd453dfdSBenny Halevy status = nfs4_preprocess_seqid_op(cstate, 35931da177e4SLinus Torvalds lock->lk_old_lock_seqid, 35941da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 3595f3362737SJ. Bruce Fields LOCK_STATE, 35963a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 35971da177e4SLinus Torvalds if (status) 35981da177e4SLinus Torvalds goto out; 35993a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 36001da177e4SLinus Torvalds } 36013a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 36021da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 36031da177e4SLinus Torvalds 36040dd395dcSNeilBrown status = nfserr_grace; 3605af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 36060dd395dcSNeilBrown goto out; 36070dd395dcSNeilBrown status = nfserr_no_grace; 3608af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 36090dd395dcSNeilBrown goto out; 36100dd395dcSNeilBrown 36111da177e4SLinus Torvalds locks_init_lock(&file_lock); 36121da177e4SLinus Torvalds switch (lock->lk_type) { 36131da177e4SLinus Torvalds case NFS4_READ_LT: 36141da177e4SLinus Torvalds case NFS4_READW_LT: 36151da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 3616150b3934SMarc Eshel cmd = F_SETLK; 36171da177e4SLinus Torvalds break; 36181da177e4SLinus Torvalds case NFS4_WRITE_LT: 36191da177e4SLinus Torvalds case NFS4_WRITEW_LT: 36201da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 3621150b3934SMarc Eshel cmd = F_SETLK; 36221da177e4SLinus Torvalds break; 36231da177e4SLinus Torvalds default: 36241da177e4SLinus Torvalds status = nfserr_inval; 36251da177e4SLinus Torvalds goto out; 36261da177e4SLinus Torvalds } 3627b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 36281da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 36291da177e4SLinus Torvalds file_lock.fl_file = filp; 36301da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3631d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 36321da177e4SLinus Torvalds 36331da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 363487df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); 36351da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 36361da177e4SLinus Torvalds 36371da177e4SLinus Torvalds /* 36381da177e4SLinus Torvalds * Try to lock the file in the VFS. 36391da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 36401da177e4SLinus Torvalds */ 36411da177e4SLinus Torvalds 3642fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 3643b8dd7b9aSAl Viro switch (-err) { 36441da177e4SLinus Torvalds case 0: /* success! */ 36451da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 36461da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 36471da177e4SLinus Torvalds sizeof(stateid_t)); 3648b8dd7b9aSAl Viro status = 0; 3649eb76b3fdSAndy Adamson break; 3650eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 3651eb76b3fdSAndy Adamson status = nfserr_denied; 3652eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 3653eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 3654eb76b3fdSAndy Adamson break; 36551da177e4SLinus Torvalds case (EDEADLK): 36561da177e4SLinus Torvalds status = nfserr_deadlock; 3657eb76b3fdSAndy Adamson break; 36581da177e4SLinus Torvalds default: 3659fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 3660eb76b3fdSAndy Adamson status = nfserr_resource; 3661eb76b3fdSAndy Adamson break; 36621da177e4SLinus Torvalds } 36631da177e4SLinus Torvalds out: 36648a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 3665f044ff83SJ. Bruce Fields release_lockowner(lock_sop); 36663a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 36673a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 3668a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 3669f2327d9aSNeil Brown } 36701da177e4SLinus Torvalds nfs4_unlock_state(); 36711da177e4SLinus Torvalds return status; 36721da177e4SLinus Torvalds } 36731da177e4SLinus Torvalds 36741da177e4SLinus Torvalds /* 367555ef1274SJ. Bruce Fields * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, 367655ef1274SJ. Bruce Fields * so we do a temporary open here just to get an open file to pass to 367755ef1274SJ. Bruce Fields * vfs_test_lock. (Arguably perhaps test_lock should be done with an 367855ef1274SJ. Bruce Fields * inode operation.) 367955ef1274SJ. Bruce Fields */ 368055ef1274SJ. Bruce Fields static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) 368155ef1274SJ. Bruce Fields { 368255ef1274SJ. Bruce Fields struct file *file; 368355ef1274SJ. Bruce Fields int err; 368455ef1274SJ. Bruce Fields 368555ef1274SJ. Bruce Fields err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); 368655ef1274SJ. Bruce Fields if (err) 368755ef1274SJ. Bruce Fields return err; 368855ef1274SJ. Bruce Fields err = vfs_test_lock(file, lock); 368955ef1274SJ. Bruce Fields nfsd_close(file); 369055ef1274SJ. Bruce Fields return err; 369155ef1274SJ. Bruce Fields } 369255ef1274SJ. Bruce Fields 369355ef1274SJ. Bruce Fields /* 36941da177e4SLinus Torvalds * LOCKT operation 36951da177e4SLinus Torvalds */ 3696b37ad28bSAl Viro __be32 3697ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3698ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 36991da177e4SLinus Torvalds { 37001da177e4SLinus Torvalds struct inode *inode; 37011da177e4SLinus Torvalds struct file_lock file_lock; 3702fd85b817SMarc Eshel int error; 3703b37ad28bSAl Viro __be32 status; 37041da177e4SLinus Torvalds 3705af558e33SJ. Bruce Fields if (locks_in_grace()) 37061da177e4SLinus Torvalds return nfserr_grace; 37071da177e4SLinus Torvalds 37081da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 37091da177e4SLinus Torvalds return nfserr_inval; 37101da177e4SLinus Torvalds 37111da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 37121da177e4SLinus Torvalds nfs4_lock_state(); 37131da177e4SLinus Torvalds 37141da177e4SLinus Torvalds status = nfserr_stale_clientid; 371560adfc50SAndy Adamson if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) 37161da177e4SLinus Torvalds goto out; 37171da177e4SLinus Torvalds 3718ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 3719849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 37201da177e4SLinus Torvalds if (status == nfserr_symlink) 37211da177e4SLinus Torvalds status = nfserr_inval; 37221da177e4SLinus Torvalds goto out; 37231da177e4SLinus Torvalds } 37241da177e4SLinus Torvalds 3725ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 37261da177e4SLinus Torvalds locks_init_lock(&file_lock); 37271da177e4SLinus Torvalds switch (lockt->lt_type) { 37281da177e4SLinus Torvalds case NFS4_READ_LT: 37291da177e4SLinus Torvalds case NFS4_READW_LT: 37301da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 37311da177e4SLinus Torvalds break; 37321da177e4SLinus Torvalds case NFS4_WRITE_LT: 37331da177e4SLinus Torvalds case NFS4_WRITEW_LT: 37341da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 37351da177e4SLinus Torvalds break; 37361da177e4SLinus Torvalds default: 37372fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 37381da177e4SLinus Torvalds status = nfserr_inval; 37391da177e4SLinus Torvalds goto out; 37401da177e4SLinus Torvalds } 37411da177e4SLinus Torvalds 37421da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 37431da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 37441da177e4SLinus Torvalds if (lockt->lt_stateowner) 37451da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 37461da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 37471da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 37481da177e4SLinus Torvalds 37491da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 375087df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); 37511da177e4SLinus Torvalds 37521da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 37531da177e4SLinus Torvalds 37541da177e4SLinus Torvalds status = nfs_ok; 375555ef1274SJ. Bruce Fields error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); 3756fd85b817SMarc Eshel if (error) { 3757fd85b817SMarc Eshel status = nfserrno(error); 3758fd85b817SMarc Eshel goto out; 3759fd85b817SMarc Eshel } 37609d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 37611da177e4SLinus Torvalds status = nfserr_denied; 37629d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 37631da177e4SLinus Torvalds } 37641da177e4SLinus Torvalds out: 37651da177e4SLinus Torvalds nfs4_unlock_state(); 37661da177e4SLinus Torvalds return status; 37671da177e4SLinus Torvalds } 37681da177e4SLinus Torvalds 3769b37ad28bSAl Viro __be32 3770ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 3771a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 37721da177e4SLinus Torvalds { 37731da177e4SLinus Torvalds struct nfs4_stateid *stp; 37741da177e4SLinus Torvalds struct file *filp = NULL; 37751da177e4SLinus Torvalds struct file_lock file_lock; 3776b37ad28bSAl Viro __be32 status; 3777b8dd7b9aSAl Viro int err; 37781da177e4SLinus Torvalds 37791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 37801da177e4SLinus Torvalds (long long) locku->lu_offset, 37811da177e4SLinus Torvalds (long long) locku->lu_length); 37821da177e4SLinus Torvalds 37831da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 37841da177e4SLinus Torvalds return nfserr_inval; 37851da177e4SLinus Torvalds 37861da177e4SLinus Torvalds nfs4_lock_state(); 37871da177e4SLinus Torvalds 3788dd453dfdSBenny Halevy if ((status = nfs4_preprocess_seqid_op(cstate, 37891da177e4SLinus Torvalds locku->lu_seqid, 37901da177e4SLinus Torvalds &locku->lu_stateid, 3791f3362737SJ. Bruce Fields LOCK_STATE, 37921da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 37931da177e4SLinus Torvalds goto out; 37941da177e4SLinus Torvalds 37951da177e4SLinus Torvalds filp = stp->st_vfs_file; 37961da177e4SLinus Torvalds BUG_ON(!filp); 37971da177e4SLinus Torvalds locks_init_lock(&file_lock); 37981da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 37991da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 38001da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 38011da177e4SLinus Torvalds file_lock.fl_file = filp; 38021da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 3803d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 38041da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 38051da177e4SLinus Torvalds 380687df4de8SBenny Halevy file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); 38071da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 38081da177e4SLinus Torvalds 38091da177e4SLinus Torvalds /* 38101da177e4SLinus Torvalds * Try to unlock the file in the VFS. 38111da177e4SLinus Torvalds */ 3812fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 3813b8dd7b9aSAl Viro if (err) { 3814fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 38151da177e4SLinus Torvalds goto out_nfserr; 38161da177e4SLinus Torvalds } 38171da177e4SLinus Torvalds /* 38181da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 38191da177e4SLinus Torvalds */ 38201da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 38211da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 38221da177e4SLinus Torvalds 38231da177e4SLinus Torvalds out: 3824f2327d9aSNeil Brown if (locku->lu_stateowner) { 38251da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 3826a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 3827f2327d9aSNeil Brown } 38281da177e4SLinus Torvalds nfs4_unlock_state(); 38291da177e4SLinus Torvalds return status; 38301da177e4SLinus Torvalds 38311da177e4SLinus Torvalds out_nfserr: 3832b8dd7b9aSAl Viro status = nfserrno(err); 38331da177e4SLinus Torvalds goto out; 38341da177e4SLinus Torvalds } 38351da177e4SLinus Torvalds 38361da177e4SLinus Torvalds /* 38371da177e4SLinus Torvalds * returns 38381da177e4SLinus Torvalds * 1: locks held by lockowner 38391da177e4SLinus Torvalds * 0: no locks held by lockowner 38401da177e4SLinus Torvalds */ 38411da177e4SLinus Torvalds static int 38421da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 38431da177e4SLinus Torvalds { 38441da177e4SLinus Torvalds struct file_lock **flpp; 38457eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 38461da177e4SLinus Torvalds int status = 0; 38471da177e4SLinus Torvalds 38481da177e4SLinus Torvalds lock_kernel(); 38491da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 3850796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 38511da177e4SLinus Torvalds status = 1; 38521da177e4SLinus Torvalds goto out; 38531da177e4SLinus Torvalds } 3854796dadfdSJ. Bruce Fields } 38551da177e4SLinus Torvalds out: 38561da177e4SLinus Torvalds unlock_kernel(); 38571da177e4SLinus Torvalds return status; 38581da177e4SLinus Torvalds } 38591da177e4SLinus Torvalds 3860b37ad28bSAl Viro __be32 3861b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 3862b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 3863b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 38641da177e4SLinus Torvalds { 38651da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 38663e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 38673e9e3dbeSNeilBrown struct nfs4_stateid *stp; 38681da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 38693e9e3dbeSNeilBrown struct list_head matches; 38703e9e3dbeSNeilBrown int i; 3871b37ad28bSAl Viro __be32 status; 38721da177e4SLinus Torvalds 38731da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 38741da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 38751da177e4SLinus Torvalds 38761da177e4SLinus Torvalds /* XXX check for lease expiration */ 38771da177e4SLinus Torvalds 38781da177e4SLinus Torvalds status = nfserr_stale_clientid; 3879849823c5SNeil Brown if (STALE_CLIENTID(clid)) 38801da177e4SLinus Torvalds return status; 38811da177e4SLinus Torvalds 38821da177e4SLinus Torvalds nfs4_lock_state(); 38831da177e4SLinus Torvalds 38841da177e4SLinus Torvalds status = nfserr_locks_held; 38853e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 38863e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 38873e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 38883e9e3dbeSNeilBrown * data structures. */ 38893e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 38903e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 38913e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3892599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 38933e9e3dbeSNeilBrown continue; 38943e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3895ea1da636SNeilBrown st_perstateowner) { 38963e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 38971da177e4SLinus Torvalds goto out; 38983e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 38993e9e3dbeSNeilBrown * so it's OK to fool with here. */ 39003e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 39011da177e4SLinus Torvalds } 39023e9e3dbeSNeilBrown } 39033e9e3dbeSNeilBrown } 39043e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 39053e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 39063e9e3dbeSNeilBrown * have been checked. */ 39071da177e4SLinus Torvalds status = nfs_ok; 39080fa822e4SNeilBrown while (!list_empty(&matches)) { 39090fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 39100fa822e4SNeilBrown so_perclient); 39110fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 39120fa822e4SNeilBrown * for openowners. */ 39130fa822e4SNeilBrown list_del(&sop->so_perclient); 3914f044ff83SJ. Bruce Fields release_lockowner(sop); 39151da177e4SLinus Torvalds } 39161da177e4SLinus Torvalds out: 39171da177e4SLinus Torvalds nfs4_unlock_state(); 39181da177e4SLinus Torvalds return status; 39191da177e4SLinus Torvalds } 39201da177e4SLinus Torvalds 39211da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3922a55370a3SNeilBrown alloc_reclaim(void) 39231da177e4SLinus Torvalds { 3924a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 39251da177e4SLinus Torvalds } 39261da177e4SLinus Torvalds 3927c7b9a459SNeilBrown int 3928a1bcecd2SAndy Adamson nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) 3929c7b9a459SNeilBrown { 3930c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3931c7b9a459SNeilBrown struct nfs4_client *clp; 3932c7b9a459SNeilBrown 3933a1bcecd2SAndy Adamson clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); 3934c7b9a459SNeilBrown return clp ? 1 : 0; 3935c7b9a459SNeilBrown } 3936c7b9a459SNeilBrown 39371da177e4SLinus Torvalds /* 39381da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 39391da177e4SLinus Torvalds */ 3940190e4fbfSNeilBrown int 3941190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 39421da177e4SLinus Torvalds { 39431da177e4SLinus Torvalds unsigned int strhashval; 39441da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39451da177e4SLinus Torvalds 3946a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3947a55370a3SNeilBrown crp = alloc_reclaim(); 39481da177e4SLinus Torvalds if (!crp) 39491da177e4SLinus Torvalds return 0; 3950a55370a3SNeilBrown strhashval = clientstr_hashval(name); 39511da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 39521da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3953a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 39541da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 39551da177e4SLinus Torvalds return 1; 39561da177e4SLinus Torvalds } 39571da177e4SLinus Torvalds 39581da177e4SLinus Torvalds static void 39591da177e4SLinus Torvalds nfs4_release_reclaim(void) 39601da177e4SLinus Torvalds { 39611da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39621da177e4SLinus Torvalds int i; 39631da177e4SLinus Torvalds 39641da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 39651da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 39661da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 39671da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 39681da177e4SLinus Torvalds list_del(&crp->cr_strhash); 39691da177e4SLinus Torvalds kfree(crp); 39701da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 39711da177e4SLinus Torvalds } 39721da177e4SLinus Torvalds } 39731da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 39741da177e4SLinus Torvalds } 39751da177e4SLinus Torvalds 39761da177e4SLinus Torvalds /* 39771da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3978fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 39791da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 39801da177e4SLinus Torvalds { 39811da177e4SLinus Torvalds unsigned int strhashval; 39821da177e4SLinus Torvalds struct nfs4_client *clp; 39831da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 39841da177e4SLinus Torvalds 39851da177e4SLinus Torvalds 39861da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 39871da177e4SLinus Torvalds clp = find_confirmed_client(clid); 39881da177e4SLinus Torvalds if (clp == NULL) 39891da177e4SLinus Torvalds return NULL; 39901da177e4SLinus Torvalds 3991a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3992a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3993a55370a3SNeilBrown clp->cl_recdir); 39941da177e4SLinus Torvalds 39951da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3996a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 39971da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3998a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 39991da177e4SLinus Torvalds return crp; 40001da177e4SLinus Torvalds } 40011da177e4SLinus Torvalds } 40021da177e4SLinus Torvalds return NULL; 40031da177e4SLinus Torvalds } 40041da177e4SLinus Torvalds 40051da177e4SLinus Torvalds /* 40061da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 40071da177e4SLinus Torvalds */ 4008b37ad28bSAl Viro __be32 40091da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 40101da177e4SLinus Torvalds { 4011dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 40121da177e4SLinus Torvalds } 40131da177e4SLinus Torvalds 4014ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 40151da177e4SLinus Torvalds 4016e8ff2a84SJ. Bruce Fields int 4017ac4d8ff2SNeilBrown nfs4_state_init(void) 40181da177e4SLinus Torvalds { 4019e8ff2a84SJ. Bruce Fields int i, status; 40201da177e4SLinus Torvalds 4021e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 4022e8ff2a84SJ. Bruce Fields if (status) 4023e8ff2a84SJ. Bruce Fields return status; 40241da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 40251da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 40261da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 40271da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 40281da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 40291da177e4SLinus Torvalds } 40305282fd72SMarc Eshel for (i = 0; i < SESSION_HASH_SIZE; i++) 40315282fd72SMarc Eshel INIT_LIST_HEAD(&sessionid_hashtbl[i]); 40321da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 40331da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 40341da177e4SLinus Torvalds } 40351da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 40361da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 40371da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 40381da177e4SLinus Torvalds } 40391da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 40401da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 40411da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 40421da177e4SLinus Torvalds } 40431da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 40441da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 40451da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 40461da177e4SLinus Torvalds } 40471da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 40481da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 40491da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 40501da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 4051ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 4052ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 4053ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 4054e8ff2a84SJ. Bruce Fields return 0; 4055ac4d8ff2SNeilBrown } 4056ac4d8ff2SNeilBrown 4057190e4fbfSNeilBrown static void 4058190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 4059190e4fbfSNeilBrown { 4060190e4fbfSNeilBrown int status; 4061190e4fbfSNeilBrown 40620964a3d3SNeilBrown nfs4_lock_state(); 40630964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 4064190e4fbfSNeilBrown status = nfsd4_recdir_load(); 40650964a3d3SNeilBrown nfs4_unlock_state(); 4066190e4fbfSNeilBrown if (status) 4067190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 4068190e4fbfSNeilBrown } 4069190e4fbfSNeilBrown 40709a8db97eSMarc Eshel unsigned long 40719a8db97eSMarc Eshel get_nfs4_grace_period(void) 40729a8db97eSMarc Eshel { 40739a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 40749a8db97eSMarc Eshel } 40759a8db97eSMarc Eshel 4076c2f1a551SMeelap Shah /* 4077c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 4078c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 4079c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 4080c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 4081c2f1a551SMeelap Shah * 4082c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 4083c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 4084c2f1a551SMeelap Shah */ 4085c2f1a551SMeelap Shah static void 4086c2f1a551SMeelap Shah set_max_delegations(void) 4087c2f1a551SMeelap Shah { 4088c2f1a551SMeelap Shah /* 4089c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 4090c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 4091c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 4092c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 4093c2f1a551SMeelap Shah */ 4094c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 4095c2f1a551SMeelap Shah } 4096c2f1a551SMeelap Shah 4097ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 4098ac4d8ff2SNeilBrown 4099ac4d8ff2SNeilBrown static void 4100ac4d8ff2SNeilBrown __nfs4_state_start(void) 4101ac4d8ff2SNeilBrown { 41029a8db97eSMarc Eshel unsigned long grace_time; 4103ac4d8ff2SNeilBrown 41041da177e4SLinus Torvalds boot_time = get_seconds(); 4105af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 4106d99a05adSNeilBrown lease_time = user_lease_time; 4107af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 41089a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 41099a8db97eSMarc Eshel grace_time/HZ); 411058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 41119a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 4112c2f1a551SMeelap Shah set_max_delegations(); 41131da177e4SLinus Torvalds } 41141da177e4SLinus Torvalds 4115e8ff2a84SJ. Bruce Fields void 411676a3550eSNeilBrown nfs4_state_start(void) 41171da177e4SLinus Torvalds { 41181da177e4SLinus Torvalds if (nfs4_init) 4119e8ff2a84SJ. Bruce Fields return; 4120190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 412176a3550eSNeilBrown __nfs4_state_start(); 41221da177e4SLinus Torvalds nfs4_init = 1; 4123e8ff2a84SJ. Bruce Fields return; 41241da177e4SLinus Torvalds } 41251da177e4SLinus Torvalds 41261da177e4SLinus Torvalds time_t 41271da177e4SLinus Torvalds nfs4_lease_time(void) 41281da177e4SLinus Torvalds { 41291da177e4SLinus Torvalds return lease_time; 41301da177e4SLinus Torvalds } 41311da177e4SLinus Torvalds 41321da177e4SLinus Torvalds static void 41331da177e4SLinus Torvalds __nfs4_state_shutdown(void) 41341da177e4SLinus Torvalds { 41351da177e4SLinus Torvalds int i; 41361da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 41371da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 41381da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 41391da177e4SLinus Torvalds 41401da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 41411da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 41421da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 41431da177e4SLinus Torvalds expire_client(clp); 41441da177e4SLinus Torvalds } 41451da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 41461da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 41471da177e4SLinus Torvalds expire_client(clp); 41481da177e4SLinus Torvalds } 41491da177e4SLinus Torvalds } 41501da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 41511da177e4SLinus Torvalds spin_lock(&recall_lock); 41521da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 41531da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 41541da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 41551da177e4SLinus Torvalds } 41561da177e4SLinus Torvalds spin_unlock(&recall_lock); 41571da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 41581da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 41591da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 41601da177e4SLinus Torvalds unhash_delegation(dp); 41611da177e4SLinus Torvalds } 41621da177e4SLinus Torvalds 4163190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 41641da177e4SLinus Torvalds nfs4_init = 0; 41651da177e4SLinus Torvalds } 41661da177e4SLinus Torvalds 41671da177e4SLinus Torvalds void 41681da177e4SLinus Torvalds nfs4_state_shutdown(void) 41691da177e4SLinus Torvalds { 41705e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 41715e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 41722c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 41731da177e4SLinus Torvalds nfs4_lock_state(); 41741da177e4SLinus Torvalds nfs4_release_reclaim(); 41751da177e4SLinus Torvalds __nfs4_state_shutdown(); 41761da177e4SLinus Torvalds nfs4_unlock_state(); 41771da177e4SLinus Torvalds } 41781da177e4SLinus Torvalds 41793dd98a3bSJeff Layton /* 41803dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 41813dd98a3bSJeff Layton * accessed when nfsd is starting. 41823dd98a3bSJeff Layton */ 41830964a3d3SNeilBrown static void 41840964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 41850964a3d3SNeilBrown { 41860964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 41870964a3d3SNeilBrown } 41880964a3d3SNeilBrown 41890964a3d3SNeilBrown /* 41900964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 41910964a3d3SNeilBrown */ 41920964a3d3SNeilBrown int 41930964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 41940964a3d3SNeilBrown { 41950964a3d3SNeilBrown int status; 4196a63bb996SAl Viro struct path path; 41970964a3d3SNeilBrown 4198a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 41990964a3d3SNeilBrown if (status) 42000964a3d3SNeilBrown return status; 42010964a3d3SNeilBrown status = -ENOTDIR; 4202a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 42030964a3d3SNeilBrown nfs4_set_recdir(recdir); 42040964a3d3SNeilBrown status = 0; 42050964a3d3SNeilBrown } 4206a63bb996SAl Viro path_put(&path); 42070964a3d3SNeilBrown return status; 42080964a3d3SNeilBrown } 42090964a3d3SNeilBrown 42103dd98a3bSJeff Layton char * 42113dd98a3bSJeff Layton nfs4_recoverydir(void) 42123dd98a3bSJeff Layton { 42133dd98a3bSJeff Layton return user_recovery_dirname; 42143dd98a3bSJeff Layton } 42153dd98a3bSJeff Layton 42161da177e4SLinus Torvalds /* 42171da177e4SLinus Torvalds * Called when leasetime is changed. 42181da177e4SLinus Torvalds * 4219d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 4220d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 4221d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 4222d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 4223d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 42243dd98a3bSJeff Layton * 42253dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 42263dd98a3bSJeff Layton * when nfsd is starting 42271da177e4SLinus Torvalds */ 42281da177e4SLinus Torvalds void 42291da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 42301da177e4SLinus Torvalds { 4231d99a05adSNeilBrown user_lease_time = leasetime; 42321da177e4SLinus Torvalds } 4233