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> 571da177e4SLinus Torvalds 581da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 591da177e4SLinus Torvalds 601da177e4SLinus Torvalds /* Globals */ 611da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 62d99a05adSNeilBrown static time_t user_lease_time = 90; 63fd39ca9aSNeilBrown static time_t boot_time; 641da177e4SLinus Torvalds static u32 current_ownerid = 1; 651da177e4SLinus Torvalds static u32 current_fileid = 1; 661da177e4SLinus Torvalds static u32 current_delegid = 1; 671da177e4SLinus Torvalds static u32 nfs4_init; 68fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 69fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 70fd39ca9aSNeilBrown 71fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 72fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 731da177e4SLinus Torvalds 741da177e4SLinus Torvalds /* forward declarations */ 75fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 761da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 771da177e4SLinus Torvalds static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 780964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 790964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 801da177e4SLinus Torvalds 811da177e4SLinus Torvalds /* Locking: 821da177e4SLinus Torvalds * 83353ab6e9SIngo Molnar * client_mutex: 841da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 851da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 861da177e4SLinus Torvalds */ 87353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 881da177e4SLinus Torvalds 89e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 90e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 93e60d4398SNeilBrown 941da177e4SLinus Torvalds void 951da177e4SLinus Torvalds nfs4_lock_state(void) 961da177e4SLinus Torvalds { 97353ab6e9SIngo Molnar mutex_lock(&client_mutex); 981da177e4SLinus Torvalds } 991da177e4SLinus Torvalds 1001da177e4SLinus Torvalds void 1011da177e4SLinus Torvalds nfs4_unlock_state(void) 1021da177e4SLinus Torvalds { 103353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1041da177e4SLinus Torvalds } 1051da177e4SLinus Torvalds 1061da177e4SLinus Torvalds static inline u32 1071da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1081da177e4SLinus Torvalds { 1091da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1101da177e4SLinus Torvalds 1111da177e4SLinus Torvalds u32 x = 0; 1121da177e4SLinus Torvalds while (nbytes--) { 1131da177e4SLinus Torvalds x *= 37; 1141da177e4SLinus Torvalds x += *cptr++; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds return x; 1171da177e4SLinus Torvalds } 1181da177e4SLinus Torvalds 1191da177e4SLinus Torvalds /* forward declarations */ 1201da177e4SLinus Torvalds static void release_stateowner(struct nfs4_stateowner *sop); 1211da177e4SLinus Torvalds static void release_stateid(struct nfs4_stateid *stp, int flags); 1221da177e4SLinus Torvalds 1231da177e4SLinus Torvalds /* 1241da177e4SLinus Torvalds * Delegation state 1251da177e4SLinus Torvalds */ 1261da177e4SLinus Torvalds 1271da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 12834af946aSIngo Molnar static DEFINE_SPINLOCK(recall_lock); 1291da177e4SLinus Torvalds static struct list_head del_recall_lru; 1301da177e4SLinus Torvalds 13113cd2184SNeilBrown static void 13213cd2184SNeilBrown free_nfs4_file(struct kref *kref) 13313cd2184SNeilBrown { 13413cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13513cd2184SNeilBrown list_del(&fp->fi_hash); 13613cd2184SNeilBrown iput(fp->fi_inode); 13713cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13813cd2184SNeilBrown } 13913cd2184SNeilBrown 14013cd2184SNeilBrown static inline void 14113cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14213cd2184SNeilBrown { 14313cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14413cd2184SNeilBrown } 14513cd2184SNeilBrown 14613cd2184SNeilBrown static inline void 14713cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14813cd2184SNeilBrown { 14913cd2184SNeilBrown kref_get(&fi->fi_ref); 15013cd2184SNeilBrown } 15113cd2184SNeilBrown 152ef0f3390SNeilBrown static int num_delegations; 153c2f1a551SMeelap Shah unsigned int max_delegations; 154ef0f3390SNeilBrown 155ef0f3390SNeilBrown /* 156ef0f3390SNeilBrown * Open owner state (share locks) 157ef0f3390SNeilBrown */ 158ef0f3390SNeilBrown 159ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 160ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 161ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 162ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 163ef0f3390SNeilBrown 164ef0f3390SNeilBrown #define ownerid_hashval(id) \ 165ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 166ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 167ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 168ef0f3390SNeilBrown 169ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 170ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 171ef0f3390SNeilBrown 172ef0f3390SNeilBrown /* hash table for nfs4_file */ 173ef0f3390SNeilBrown #define FILE_HASH_BITS 8 174ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 175ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 176ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 177ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 178ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 179ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 180ef0f3390SNeilBrown 181ef0f3390SNeilBrown #define file_hashval(x) \ 182ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 183ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 184ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 185ef0f3390SNeilBrown 186ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 187ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 188ef0f3390SNeilBrown 1891da177e4SLinus Torvalds static struct nfs4_delegation * 1901da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1911da177e4SLinus Torvalds { 1921da177e4SLinus Torvalds struct nfs4_delegation *dp; 1931da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1941da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1951da177e4SLinus Torvalds 1961da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 19747f9940cSMeelap Shah if (fp->fi_had_conflict) 19847f9940cSMeelap Shah return NULL; 199c2f1a551SMeelap Shah if (num_delegations > max_delegations) 200ef0f3390SNeilBrown return NULL; 2015b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2025b2d21c1SNeilBrown if (dp == NULL) 2031da177e4SLinus Torvalds return dp; 204ef0f3390SNeilBrown num_delegations++; 205ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 206ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2071da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2081da177e4SLinus Torvalds dp->dl_client = clp; 20913cd2184SNeilBrown get_nfs4_file(fp); 2101da177e4SLinus Torvalds dp->dl_file = fp; 2111da177e4SLinus Torvalds dp->dl_flock = NULL; 2121da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2131da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2141da177e4SLinus Torvalds dp->dl_type = type; 2151da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2161da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2171da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2181da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2191da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2201da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2211da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2221da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 2231da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 2241da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 2251da177e4SLinus Torvalds dp->dl_time = 0; 2261da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 227ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 228ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2291da177e4SLinus Torvalds return dp; 2301da177e4SLinus Torvalds } 2311da177e4SLinus Torvalds 2321da177e4SLinus Torvalds void 2331da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2341da177e4SLinus Torvalds { 2351da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2361da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 23713cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2385b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 239ef0f3390SNeilBrown num_delegations--; 2401da177e4SLinus Torvalds } 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds 2431da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2441da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2451da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2461da177e4SLinus Torvalds * fl_release_callback. 2471da177e4SLinus Torvalds */ 2481da177e4SLinus Torvalds static void 2491da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2501da177e4SLinus Torvalds { 2511da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2521da177e4SLinus Torvalds 2531da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2541da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2551da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2561da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 257c907132dSNeilBrown if (dp->dl_flock) 258a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2591da177e4SLinus Torvalds nfsd_close(filp); 2601da177e4SLinus Torvalds } 2611da177e4SLinus Torvalds 2621da177e4SLinus Torvalds /* Called under the state lock. */ 2631da177e4SLinus Torvalds static void 2641da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2651da177e4SLinus Torvalds { 266ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 267ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2681da177e4SLinus Torvalds spin_lock(&recall_lock); 2691da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2701da177e4SLinus Torvalds spin_unlock(&recall_lock); 2711da177e4SLinus Torvalds nfs4_close_delegation(dp); 2721da177e4SLinus Torvalds nfs4_put_delegation(dp); 2731da177e4SLinus Torvalds } 2741da177e4SLinus Torvalds 2751da177e4SLinus Torvalds /* 2761da177e4SLinus Torvalds * SETCLIENTID state 2771da177e4SLinus Torvalds */ 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2801da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2811da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2821da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2831da177e4SLinus Torvalds 2841da177e4SLinus Torvalds #define clientid_hashval(id) \ 2851da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 286a55370a3SNeilBrown #define clientstr_hashval(name) \ 287a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2881da177e4SLinus Torvalds /* 2891da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2901da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2911da177e4SLinus Torvalds * 2921da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2931da177e4SLinus Torvalds * setclientid_confirmed info. 2941da177e4SLinus Torvalds * 2951da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2961da177e4SLinus Torvalds * setclientid info. 2971da177e4SLinus Torvalds * 2981da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2991da177e4SLinus Torvalds * for lease renewal. 3001da177e4SLinus Torvalds * 3011da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3021da177e4SLinus Torvalds * for last close replay. 3031da177e4SLinus Torvalds */ 3041da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3051da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3061da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3071da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3081da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3091da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3101da177e4SLinus Torvalds static struct list_head client_lru; 3111da177e4SLinus Torvalds static struct list_head close_lru; 3121da177e4SLinus Torvalds 3131da177e4SLinus Torvalds static inline void 3141da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 3151da177e4SLinus Torvalds { 3161da177e4SLinus Torvalds /* 3171da177e4SLinus Torvalds * Move client to the end to the LRU list. 3181da177e4SLinus Torvalds */ 3191da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 3201da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 3211da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3221da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 3231da177e4SLinus Torvalds clp->cl_time = get_seconds(); 3241da177e4SLinus Torvalds } 3251da177e4SLinus Torvalds 3261da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 3271da177e4SLinus Torvalds static int 3281da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 3291da177e4SLinus Torvalds { 3301da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 3311da177e4SLinus Torvalds return 0; 3321da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 3331da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 3341da177e4SLinus Torvalds return 1; 3351da177e4SLinus Torvalds } 3361da177e4SLinus Torvalds 3371da177e4SLinus Torvalds /* 3381da177e4SLinus Torvalds * XXX Should we use a slab cache ? 3391da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 3401da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 3411da177e4SLinus Torvalds */ 34235bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 3431da177e4SLinus Torvalds { 3441da177e4SLinus Torvalds struct nfs4_client *clp; 3451da177e4SLinus Torvalds 34635bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 34735bba9a3SJ. Bruce Fields if (clp == NULL) 34835bba9a3SJ. Bruce Fields return NULL; 34935bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 35035bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 35135bba9a3SJ. Bruce Fields kfree(clp); 35235bba9a3SJ. Bruce Fields return NULL; 35335bba9a3SJ. Bruce Fields } 3541da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3551da177e4SLinus Torvalds clp->cl_name.len = name.len; 3561da177e4SLinus Torvalds return clp; 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds 3591b1a9b31SJ. Bruce Fields static void 3601b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 3611b1a9b31SJ. Bruce Fields { 3621b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3631b1a9b31SJ. Bruce Fields 3641b1a9b31SJ. Bruce Fields if (clnt) { 365404ec117SJ. Bruce Fields /* 366404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 367404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 368404ec117SJ. Bruce Fields */ 3691b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 3701b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 3711b1a9b31SJ. Bruce Fields } 3721b1a9b31SJ. Bruce Fields } 3731b1a9b31SJ. Bruce Fields 3741da177e4SLinus Torvalds static inline void 3751da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3761da177e4SLinus Torvalds { 3771b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 3781da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3791da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3801da177e4SLinus Torvalds kfree(clp->cl_name.data); 3811da177e4SLinus Torvalds kfree(clp); 3821da177e4SLinus Torvalds } 3831da177e4SLinus Torvalds 3841da177e4SLinus Torvalds void 3851da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3861da177e4SLinus Torvalds { 3871da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3881da177e4SLinus Torvalds free_client(clp); 3891da177e4SLinus Torvalds } 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds static void 3921da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3931da177e4SLinus Torvalds { 3941da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3951da177e4SLinus Torvalds struct nfs4_delegation *dp; 3961da177e4SLinus Torvalds struct list_head reaplist; 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3991da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4021da177e4SLinus Torvalds spin_lock(&recall_lock); 403ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 404ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4051da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4061da177e4SLinus Torvalds dp->dl_flock); 407ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4081da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds spin_unlock(&recall_lock); 4111da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4121da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4131da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4141da177e4SLinus Torvalds unhash_delegation(dp); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4171da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4181da177e4SLinus Torvalds list_del(&clp->cl_lru); 419ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 420ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4211da177e4SLinus Torvalds release_stateowner(sop); 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds put_nfs4_client(clp); 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds 42635bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 42735bba9a3SJ. Bruce Fields { 4281da177e4SLinus Torvalds struct nfs4_client *clp; 4291da177e4SLinus Torvalds 43035bba9a3SJ. Bruce Fields clp = alloc_client(name); 43135bba9a3SJ. Bruce Fields if (clp == NULL) 43235bba9a3SJ. Bruce Fields return NULL; 433a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4341da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4351da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4361da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4371da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 438ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 439ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4401da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4411da177e4SLinus Torvalds return clp; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds 44435bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 44535bba9a3SJ. Bruce Fields { 44635bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 44735bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 45035bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 45135bba9a3SJ. Bruce Fields { 4521da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4531da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4541da177e4SLinus Torvalds } 4551da177e4SLinus Torvalds 45635bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 45735bba9a3SJ. Bruce Fields { 4581da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4591da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4601da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4611da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 46435bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 465599e0a22SJ. Bruce Fields { 466a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds static int 470599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 471599e0a22SJ. Bruce Fields { 472599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds static int 476599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 477599e0a22SJ. Bruce Fields { 478599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 4791da177e4SLinus Torvalds } 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds /* XXX what about NGROUP */ 4821da177e4SLinus Torvalds static int 483599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 484599e0a22SJ. Bruce Fields { 485599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4885ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 4895ec7b46cSJ. Bruce Fields { 4905ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 4915ec7b46cSJ. Bruce Fields 4921da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4931da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4941da177e4SLinus Torvalds } 4951da177e4SLinus Torvalds 496deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 497deda2faaSJ. Bruce Fields { 498deda2faaSJ. Bruce Fields static u32 i; 4991da177e4SLinus Torvalds u32 *p; 5001da177e4SLinus Torvalds 5011da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 502deda2faaSJ. Bruce Fields *p++ = get_seconds(); 503deda2faaSJ. Bruce Fields *p++ = i++; 5041da177e4SLinus Torvalds } 5051da177e4SLinus Torvalds 50635bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 50735bba9a3SJ. Bruce Fields { 5081da177e4SLinus Torvalds if (name.len == 0) 5091da177e4SLinus Torvalds return 0; 5101da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5112fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 5121da177e4SLinus Torvalds return 0; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds return 1; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 517fd39ca9aSNeilBrown static void 5181da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5191da177e4SLinus Torvalds { 5201da177e4SLinus Torvalds unsigned int idhashval; 5211da177e4SLinus Torvalds 5221da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 5231da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5241da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 5251da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 5261da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5271da177e4SLinus Torvalds } 5281da177e4SLinus Torvalds 529fd39ca9aSNeilBrown static void 5301da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 5311da177e4SLinus Torvalds { 5321da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5331da177e4SLinus Torvalds unsigned int strhashval; 5341da177e4SLinus Torvalds 5351da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 5361da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 537f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 538a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 5391da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 5401da177e4SLinus Torvalds renew_client(clp); 5411da177e4SLinus Torvalds } 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds static struct nfs4_client * 5441da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds struct nfs4_client *clp; 5471da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5481da177e4SLinus Torvalds 5491da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 550599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 5511da177e4SLinus Torvalds return clp; 5521da177e4SLinus Torvalds } 5531da177e4SLinus Torvalds return NULL; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds static struct nfs4_client * 5571da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5581da177e4SLinus Torvalds { 5591da177e4SLinus Torvalds struct nfs4_client *clp; 5601da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5611da177e4SLinus Torvalds 5621da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 563599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 5641da177e4SLinus Torvalds return clp; 5651da177e4SLinus Torvalds } 5661da177e4SLinus Torvalds return NULL; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds 56928ce6054SNeilBrown static struct nfs4_client * 57028ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 57128ce6054SNeilBrown { 57228ce6054SNeilBrown struct nfs4_client *clp; 57328ce6054SNeilBrown 57428ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 57528ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 57628ce6054SNeilBrown return clp; 57728ce6054SNeilBrown } 57828ce6054SNeilBrown return NULL; 57928ce6054SNeilBrown } 58028ce6054SNeilBrown 58128ce6054SNeilBrown static struct nfs4_client * 58228ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 58328ce6054SNeilBrown { 58428ce6054SNeilBrown struct nfs4_client *clp; 58528ce6054SNeilBrown 58628ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 58728ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 58828ce6054SNeilBrown return clp; 58928ce6054SNeilBrown } 59028ce6054SNeilBrown return NULL; 59128ce6054SNeilBrown } 59228ce6054SNeilBrown 5931da177e4SLinus Torvalds /* a helper function for parse_callback */ 5941da177e4SLinus Torvalds static int 5951da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5961da177e4SLinus Torvalds { 5971da177e4SLinus Torvalds unsigned int len = *lenp; 5981da177e4SLinus Torvalds char *p = *addrp; 5991da177e4SLinus Torvalds int n = -1; 6001da177e4SLinus Torvalds char c; 6011da177e4SLinus Torvalds 6021da177e4SLinus Torvalds for (;;) { 6031da177e4SLinus Torvalds if (!len) 6041da177e4SLinus Torvalds break; 6051da177e4SLinus Torvalds len--; 6061da177e4SLinus Torvalds c = *p++; 6071da177e4SLinus Torvalds if (c == '.') 6081da177e4SLinus Torvalds break; 6091da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6101da177e4SLinus Torvalds n = -1; 6111da177e4SLinus Torvalds break; 6121da177e4SLinus Torvalds } 6131da177e4SLinus Torvalds if (n < 0) 6141da177e4SLinus Torvalds n = 0; 6151da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6161da177e4SLinus Torvalds if (n > 255) { 6171da177e4SLinus Torvalds n = -1; 6181da177e4SLinus Torvalds break; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds } 6211da177e4SLinus Torvalds *lenp = len; 6221da177e4SLinus Torvalds *addrp = p; 6231da177e4SLinus Torvalds return n; 6241da177e4SLinus Torvalds } 6251da177e4SLinus Torvalds 6261da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 627fd39ca9aSNeilBrown static int 6281da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 6291da177e4SLinus Torvalds { 6301da177e4SLinus Torvalds int temp = 0; 6311da177e4SLinus Torvalds u32 cbaddr = 0; 6321da177e4SLinus Torvalds u16 cbport = 0; 6331da177e4SLinus Torvalds u32 addrlen = addr_len; 6341da177e4SLinus Torvalds char *addr = addr_val; 6351da177e4SLinus Torvalds int i, shift; 6361da177e4SLinus Torvalds 6371da177e4SLinus Torvalds /* ipaddress */ 6381da177e4SLinus Torvalds shift = 24; 6391da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 6401da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6411da177e4SLinus Torvalds return 0; 6421da177e4SLinus Torvalds } 6431da177e4SLinus Torvalds cbaddr |= (temp << shift); 6441da177e4SLinus Torvalds if (shift > 0) 6451da177e4SLinus Torvalds shift -= 8; 6461da177e4SLinus Torvalds } 6471da177e4SLinus Torvalds *cbaddrp = cbaddr; 6481da177e4SLinus Torvalds 6491da177e4SLinus Torvalds /* port */ 6501da177e4SLinus Torvalds shift = 8; 6511da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6521da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6531da177e4SLinus Torvalds return 0; 6541da177e4SLinus Torvalds } 6551da177e4SLinus Torvalds cbport |= (temp << shift); 6561da177e4SLinus Torvalds if (shift > 0) 6571da177e4SLinus Torvalds shift -= 8; 6581da177e4SLinus Torvalds } 6591da177e4SLinus Torvalds *cbportp = cbport; 6601da177e4SLinus Torvalds return 1; 6611da177e4SLinus Torvalds } 6621da177e4SLinus Torvalds 663fd39ca9aSNeilBrown static void 6641da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6651da177e4SLinus Torvalds { 6661da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6671da177e4SLinus Torvalds 6681da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6691da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6701da177e4SLinus Torvalds goto out_err; 6711da177e4SLinus Torvalds 6721da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6731da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6741da177e4SLinus Torvalds goto out_err; 6751da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6761da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6771da177e4SLinus Torvalds return; 6781da177e4SLinus Torvalds out_err: 679849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6801da177e4SLinus Torvalds "will not receive delegations\n", 6811da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6821da177e4SLinus Torvalds 6831da177e4SLinus Torvalds return; 6841da177e4SLinus Torvalds } 6851da177e4SLinus Torvalds 686b37ad28bSAl Viro __be32 687b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 688b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 6891da177e4SLinus Torvalds { 69027459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 6911da177e4SLinus Torvalds struct xdr_netobj clname = { 6921da177e4SLinus Torvalds .len = setclid->se_namelen, 6931da177e4SLinus Torvalds .data = setclid->se_name, 6941da177e4SLinus Torvalds }; 6951da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 6961da177e4SLinus Torvalds unsigned int strhashval; 69728ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 698b37ad28bSAl Viro __be32 status; 699a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7001da177e4SLinus Torvalds 7011da177e4SLinus Torvalds if (!check_name(clname)) 70273aea4ecSNeil Brown return nfserr_inval; 7031da177e4SLinus Torvalds 704a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 705a55370a3SNeilBrown if (status) 70673aea4ecSNeil Brown return status; 707a55370a3SNeilBrown 7081da177e4SLinus Torvalds /* 7091da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7101da177e4SLinus Torvalds * We get here on a DRC miss. 7111da177e4SLinus Torvalds */ 7121da177e4SLinus Torvalds 713a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7141da177e4SLinus Torvalds 7151da177e4SLinus Torvalds nfs4_lock_state(); 71628ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 71728ce6054SNeilBrown if (conf) { 718a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 7191da177e4SLinus Torvalds status = nfserr_clid_inuse; 720599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) 72127459f09SChuck Lever || conf->cl_addr != sin->sin_addr.s_addr) { 722*be859405SHarvey Harrison dprintk("NFSD: setclientid: string in use by clientat %pI4\n", 723*be859405SHarvey Harrison &conf->cl_addr); 7241da177e4SLinus Torvalds goto out; 7251da177e4SLinus Torvalds } 7261da177e4SLinus Torvalds } 727a186e767SJ. Bruce Fields /* 728a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 729a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 730a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 731a186e767SJ. Bruce Fields */ 73228ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7331da177e4SLinus Torvalds status = nfserr_resource; 7341da177e4SLinus Torvalds if (!conf) { 7351da177e4SLinus Torvalds /* 736a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 737a186e767SJ. Bruce Fields * placed first, because it is the normal case 7381da177e4SLinus Torvalds */ 7391da177e4SLinus Torvalds if (unconf) 7401da177e4SLinus Torvalds expire_client(unconf); 741a55370a3SNeilBrown new = create_client(clname, dname); 742a55370a3SNeilBrown if (new == NULL) 7431da177e4SLinus Torvalds goto out; 7441da177e4SLinus Torvalds gen_clid(new); 745599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 7461da177e4SLinus Torvalds /* 747a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 748a186e767SJ. Bruce Fields * probable callback update 7491da177e4SLinus Torvalds */ 75031f4a6c1SNeilBrown if (unconf) { 75131f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 75231f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 75331f4a6c1SNeilBrown * This has the advantage that there is at most 75431f4a6c1SNeilBrown * one {*x***} in either list at any time. 75531f4a6c1SNeilBrown */ 7561da177e4SLinus Torvalds expire_client(unconf); 7571da177e4SLinus Torvalds } 758a55370a3SNeilBrown new = create_client(clname, dname); 759a55370a3SNeilBrown if (new == NULL) 7601da177e4SLinus Torvalds goto out; 7611da177e4SLinus Torvalds copy_clid(new, conf); 7621da177e4SLinus Torvalds } else if (!unconf) { 7631da177e4SLinus Torvalds /* 764a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 765a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 766a186e767SJ. Bruce Fields * confirmed. 7671da177e4SLinus Torvalds */ 768a55370a3SNeilBrown new = create_client(clname, dname); 769a55370a3SNeilBrown if (new == NULL) 7701da177e4SLinus Torvalds goto out; 7711da177e4SLinus Torvalds gen_clid(new); 77249ba8781SJ. Bruce Fields } else { 7731da177e4SLinus Torvalds /* 774a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 775a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 776a186e767SJ. Bruce Fields * confirmed. 7771da177e4SLinus Torvalds */ 7781da177e4SLinus Torvalds expire_client(unconf); 779a55370a3SNeilBrown new = create_client(clname, dname); 780a55370a3SNeilBrown if (new == NULL) 7811da177e4SLinus Torvalds goto out; 7821da177e4SLinus Torvalds gen_clid(new); 7831da177e4SLinus Torvalds } 784c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 785c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 786c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 787c175b83cSJ. Bruce Fields gen_confirm(new); 788c175b83cSJ. Bruce Fields gen_callback(new, setclid); 789c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 7901da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 7911da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 7921da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 7931da177e4SLinus Torvalds status = nfs_ok; 7941da177e4SLinus Torvalds out: 7951da177e4SLinus Torvalds nfs4_unlock_state(); 7961da177e4SLinus Torvalds return status; 7971da177e4SLinus Torvalds } 7981da177e4SLinus Torvalds 7991da177e4SLinus Torvalds 8001da177e4SLinus Torvalds /* 801a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 802a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 803a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 8041da177e4SLinus Torvalds */ 805b37ad28bSAl Viro __be32 806b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 807b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 808b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 8091da177e4SLinus Torvalds { 81027459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 81121ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8121da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8131da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 814b37ad28bSAl Viro __be32 status; 8151da177e4SLinus Torvalds 8161da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8171da177e4SLinus Torvalds return nfserr_stale_clientid; 8181da177e4SLinus Torvalds /* 8191da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8201da177e4SLinus Torvalds * We get here on a DRC miss. 8211da177e4SLinus Torvalds */ 8221da177e4SLinus Torvalds 8231da177e4SLinus Torvalds nfs4_lock_state(); 82421ab45a4SNeilBrown 82521ab45a4SNeilBrown conf = find_confirmed_client(clid); 82621ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 82721ab45a4SNeilBrown 82822de4d83SNeilBrown status = nfserr_clid_inuse; 82927459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 8301da177e4SLinus Torvalds goto out; 83127459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 8321da177e4SLinus Torvalds goto out; 83321ab45a4SNeilBrown 834a186e767SJ. Bruce Fields /* 835a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 836a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 837a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 838a186e767SJ. Bruce Fields */ 839366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 840a186e767SJ. Bruce Fields /* 841a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 842a186e767SJ. Bruce Fields * callback update 8437c79f737SNeilBrown */ 844599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 8451da177e4SLinus Torvalds status = nfserr_clid_inuse; 8461da177e4SLinus Torvalds else { 8471a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 8481a69c179SNeilBrown * change request correctly. */ 849cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 85021ab45a4SNeilBrown gen_confirm(conf); 85146309029SNeilBrown nfsd4_remove_clid_dir(unconf); 8521a69c179SNeilBrown expire_client(unconf); 8531da177e4SLinus Torvalds status = nfs_ok; 8541a69c179SNeilBrown 8551da177e4SLinus Torvalds } 856f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 857a186e767SJ. Bruce Fields /* 858a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 859a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 860a186e767SJ. Bruce Fields * do nothing. 8617c79f737SNeilBrown */ 862599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 8631da177e4SLinus Torvalds status = nfserr_clid_inuse; 86421ab45a4SNeilBrown else 8651da177e4SLinus Torvalds status = nfs_ok; 8667c79f737SNeilBrown } else if (!conf && unconf 867599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 868a186e767SJ. Bruce Fields /* 869a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 870a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 8711da177e4SLinus Torvalds */ 872599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 8731da177e4SLinus Torvalds status = nfserr_clid_inuse; 8741da177e4SLinus Torvalds } else { 8751a69c179SNeilBrown unsigned int hash = 8761a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 8771a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 8781a69c179SNeilBrown hash); 8791a69c179SNeilBrown if (conf) { 880c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 8811a69c179SNeilBrown expire_client(conf); 8821a69c179SNeilBrown } 8831da177e4SLinus Torvalds move_to_confirmed(unconf); 88421ab45a4SNeilBrown conf = unconf; 88546f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 8861a69c179SNeilBrown status = nfs_ok; 8871da177e4SLinus Torvalds } 888599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 889599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 8907c79f737SNeilBrown &confirm)))) { 891a186e767SJ. Bruce Fields /* 892a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 893a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 8941da177e4SLinus Torvalds */ 8951da177e4SLinus Torvalds status = nfserr_stale_clientid; 8967c79f737SNeilBrown } else { 8971da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 89822de4d83SNeilBrown status = nfserr_clid_inuse; 89908e8987cSNeilBrown } 9001da177e4SLinus Torvalds out: 9011da177e4SLinus Torvalds nfs4_unlock_state(); 9021da177e4SLinus Torvalds return status; 9031da177e4SLinus Torvalds } 9041da177e4SLinus Torvalds 9051da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9061da177e4SLinus Torvalds static inline struct nfs4_file * 9071da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9081da177e4SLinus Torvalds { 9091da177e4SLinus Torvalds struct nfs4_file *fp; 9101da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9111da177e4SLinus Torvalds 912e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 913e60d4398SNeilBrown if (fp) { 91413cd2184SNeilBrown kref_init(&fp->fi_ref); 9151da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9168beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9178beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9181da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9191da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9201da177e4SLinus Torvalds fp->fi_id = current_fileid++; 92147f9940cSMeelap Shah fp->fi_had_conflict = false; 9221da177e4SLinus Torvalds return fp; 9231da177e4SLinus Torvalds } 9241da177e4SLinus Torvalds return NULL; 9251da177e4SLinus Torvalds } 9261da177e4SLinus Torvalds 9271da177e4SLinus Torvalds static void 928e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 929e60d4398SNeilBrown { 930e60d4398SNeilBrown if (*slab == NULL) 931e60d4398SNeilBrown return; 9321a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 933e60d4398SNeilBrown *slab = NULL; 934e60d4398SNeilBrown } 935e60d4398SNeilBrown 936e8ff2a84SJ. Bruce Fields void 937e60d4398SNeilBrown nfsd4_free_slabs(void) 938e60d4398SNeilBrown { 939e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 940e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 9415ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 9425b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 943e60d4398SNeilBrown } 9441da177e4SLinus Torvalds 9451da177e4SLinus Torvalds static int 9461da177e4SLinus Torvalds nfsd4_init_slabs(void) 9471da177e4SLinus Torvalds { 9481da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 94920c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 950e60d4398SNeilBrown if (stateowner_slab == NULL) 951e60d4398SNeilBrown goto out_nomem; 952e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 95320c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 954e60d4398SNeilBrown if (file_slab == NULL) 955e60d4398SNeilBrown goto out_nomem; 9565ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 95720c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 9585ac049acSNeilBrown if (stateid_slab == NULL) 9595ac049acSNeilBrown goto out_nomem; 9605b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 96120c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 9625b2d21c1SNeilBrown if (deleg_slab == NULL) 9635b2d21c1SNeilBrown goto out_nomem; 964e60d4398SNeilBrown return 0; 965e60d4398SNeilBrown out_nomem: 966e60d4398SNeilBrown nfsd4_free_slabs(); 9671da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 9681da177e4SLinus Torvalds return -ENOMEM; 9691da177e4SLinus Torvalds } 9701da177e4SLinus Torvalds 9711da177e4SLinus Torvalds void 9721da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 9731da177e4SLinus Torvalds { 9741da177e4SLinus Torvalds struct nfs4_stateowner *sop = 9751da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 9761da177e4SLinus Torvalds kfree(sop->so_owner.data); 9771da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 9781da177e4SLinus Torvalds } 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds static inline struct nfs4_stateowner * 9811da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 9821da177e4SLinus Torvalds { 9831da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 9861da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 9871da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 9881da177e4SLinus Torvalds sop->so_owner.len = owner->len; 9891da177e4SLinus Torvalds kref_init(&sop->so_ref); 9901da177e4SLinus Torvalds return sop; 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds return NULL; 9951da177e4SLinus Torvalds } 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds static struct nfs4_stateowner * 9981da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 9991da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10001da177e4SLinus Torvalds struct nfs4_replay *rp; 10011da177e4SLinus Torvalds unsigned int idhashval; 10021da177e4SLinus Torvalds 10031da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10041da177e4SLinus Torvalds return NULL; 10051da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10061da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10071da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10081da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1009ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1010ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10111da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10121da177e4SLinus Torvalds sop->so_time = 0; 10131da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10141da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1015ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10161da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10171da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10181da177e4SLinus Torvalds sop->so_client = clp; 10191da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10201da177e4SLinus Torvalds sop->so_confirmed = 0; 10211da177e4SLinus Torvalds rp = &sop->so_replay; 1022de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 10231da177e4SLinus Torvalds rp->rp_buflen = 0; 10241da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 10251da177e4SLinus Torvalds return sop; 10261da177e4SLinus Torvalds } 10271da177e4SLinus Torvalds 10281da177e4SLinus Torvalds static void 10291da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 10301da177e4SLinus Torvalds { 10311da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 10321da177e4SLinus Torvalds 1033ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1034ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1035ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1036ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 10371da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 10381da177e4SLinus Torvalds release_stateowner(lock_sop); 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds } 10411da177e4SLinus Torvalds 10421da177e4SLinus Torvalds static void 10431da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 10441da177e4SLinus Torvalds { 10451da177e4SLinus Torvalds struct nfs4_stateid *stp; 10461da177e4SLinus Torvalds 10471da177e4SLinus Torvalds list_del(&sop->so_idhash); 10481da177e4SLinus Torvalds list_del(&sop->so_strhash); 10496fa305deSNeilBrown if (sop->so_is_open_owner) 10501da177e4SLinus Torvalds list_del(&sop->so_perclient); 1051ea1da636SNeilBrown list_del(&sop->so_perstateid); 1052ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1053ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1054ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 10551da177e4SLinus Torvalds if (sop->so_is_open_owner) 10561da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 10571da177e4SLinus Torvalds else 10581da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static void 10631da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds unhash_stateowner(sop); 10661da177e4SLinus Torvalds list_del(&sop->so_close_lru); 10671da177e4SLinus Torvalds nfs4_put_stateowner(sop); 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds 10701da177e4SLinus Torvalds static inline void 10711da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 10721da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 10731da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1076ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1077ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 10781da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 10791da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1080ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 10818beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 10821da177e4SLinus Torvalds stp->st_stateowner = sop; 108313cd2184SNeilBrown get_nfs4_file(fp); 10841da177e4SLinus Torvalds stp->st_file = fp; 10851da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 10861da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 10871da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 10881da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 10891da177e4SLinus Torvalds stp->st_access_bmap = 0; 10901da177e4SLinus Torvalds stp->st_deny_bmap = 0; 10911da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 10921da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 10934c4cd222SNeilBrown stp->st_openstp = NULL; 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds static void 10971da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 10981da177e4SLinus Torvalds { 10991da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11001da177e4SLinus Torvalds 11011da177e4SLinus Torvalds list_del(&stp->st_hash); 11021da177e4SLinus Torvalds list_del(&stp->st_perfile); 1103ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11041da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11051da177e4SLinus Torvalds release_stateid_lockowners(stp); 11061da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11071da177e4SLinus Torvalds nfsd_close(filp); 11081da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11091da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 111013cd2184SNeilBrown put_nfs4_file(stp->st_file); 11115ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds 1114fd39ca9aSNeilBrown static void 11151da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11161da177e4SLinus Torvalds { 11171da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11181da177e4SLinus Torvalds 1119358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11201da177e4SLinus Torvalds sop->so_time = get_seconds(); 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds 11231da177e4SLinus Torvalds static int 1124599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1125599e0a22SJ. Bruce Fields clientid_t *clid) 1126599e0a22SJ. Bruce Fields { 1127599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1128599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1129599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static struct nfs4_stateowner * 11331da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 11341da177e4SLinus Torvalds { 11351da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 11361da177e4SLinus Torvalds 11371da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1138599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 11391da177e4SLinus Torvalds return so; 11401da177e4SLinus Torvalds } 11411da177e4SLinus Torvalds return NULL; 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 11451da177e4SLinus Torvalds static struct nfs4_file * 11461da177e4SLinus Torvalds find_file(struct inode *ino) 11471da177e4SLinus Torvalds { 11481da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 11491da177e4SLinus Torvalds struct nfs4_file *fp; 11501da177e4SLinus Torvalds 11511da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 115213cd2184SNeilBrown if (fp->fi_inode == ino) { 115313cd2184SNeilBrown get_nfs4_file(fp); 11541da177e4SLinus Torvalds return fp; 11551da177e4SLinus Torvalds } 115613cd2184SNeilBrown } 11571da177e4SLinus Torvalds return NULL; 11581da177e4SLinus Torvalds } 11591da177e4SLinus Torvalds 11608838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1161ba5a6a19SJ. Bruce Fields { 11628838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 11638838dc43SJ. Bruce Fields return 0; 11648838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 11658838dc43SJ. Bruce Fields return 0; 11668838dc43SJ. Bruce Fields return 1; 1167ba5a6a19SJ. Bruce Fields } 1168ba5a6a19SJ. Bruce Fields 11698838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1170ba5a6a19SJ. Bruce Fields { 11718838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 11728838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1173ba5a6a19SJ. Bruce Fields } 11741da177e4SLinus Torvalds 11754f83aa30SJ. Bruce Fields /* 11764f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 11774f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 11784f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 11794f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 11804f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 11814f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 11824f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 11834f83aa30SJ. Bruce Fields * 11844f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 11854f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 11864f83aa30SJ. Bruce Fields * 11874f83aa30SJ. Bruce Fields * OPEN allow read, deny write 11884f83aa30SJ. Bruce Fields * OPEN allow both, deny none 11894f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 11904f83aa30SJ. Bruce Fields * 11914f83aa30SJ. Bruce Fields * which we should reject. 11924f83aa30SJ. Bruce Fields */ 1193fd39ca9aSNeilBrown static void 11941da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 11951da177e4SLinus Torvalds int i; 11961da177e4SLinus Torvalds 11971da177e4SLinus Torvalds *access = 0; 11981da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 11991da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12001da177e4SLinus Torvalds *access |= i; 12011da177e4SLinus Torvalds } 12021da177e4SLinus Torvalds } 12031da177e4SLinus Torvalds 1204fd39ca9aSNeilBrown static void 12051da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12061da177e4SLinus Torvalds int i; 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds *deny = 0; 12091da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12101da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12111da177e4SLinus Torvalds *deny |= i ; 12121da177e4SLinus Torvalds } 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds 12151da177e4SLinus Torvalds static int 12161da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12171da177e4SLinus Torvalds unsigned int access, deny; 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12201da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12211da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12221da177e4SLinus Torvalds return 0; 12231da177e4SLinus Torvalds return 1; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds 12261da177e4SLinus Torvalds /* 12271da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12281da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12291da177e4SLinus Torvalds */ 1230b37ad28bSAl Viro static __be32 12311da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12321da177e4SLinus Torvalds { 12331da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12341da177e4SLinus Torvalds struct nfs4_file *fp; 12351da177e4SLinus Torvalds struct nfs4_stateid *stp; 1236b37ad28bSAl Viro __be32 ret; 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds fp = find_file(ino); 124113cd2184SNeilBrown if (!fp) 124213cd2184SNeilBrown return nfs_ok; 1243b700949bSNeilBrown ret = nfserr_locked; 12441da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12458beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12461da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12471da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 124813cd2184SNeilBrown goto out; 12491da177e4SLinus Torvalds } 125013cd2184SNeilBrown ret = nfs_ok; 125113cd2184SNeilBrown out: 125213cd2184SNeilBrown put_nfs4_file(fp); 125313cd2184SNeilBrown return ret; 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds 12561da177e4SLinus Torvalds static inline void 12571da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 12581da177e4SLinus Torvalds { 12591da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1260aceaf78dSDave Hansen drop_file_write_access(filp); 12611da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds /* 12661da177e4SLinus Torvalds * Recall a delegation 12671da177e4SLinus Torvalds */ 12681da177e4SLinus Torvalds static int 12691da177e4SLinus Torvalds do_recall(void *__dp) 12701da177e4SLinus Torvalds { 12711da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 12721da177e4SLinus Torvalds 127347f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 12741da177e4SLinus Torvalds nfsd4_cb_recall(dp); 12751da177e4SLinus Torvalds return 0; 12761da177e4SLinus Torvalds } 12771da177e4SLinus Torvalds 12781da177e4SLinus Torvalds /* 12791da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 12801da177e4SLinus Torvalds * by the lease (file_lock) 12811da177e4SLinus Torvalds * 12821da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 12831da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 12841da177e4SLinus Torvalds * lease. 12851da177e4SLinus Torvalds */ 12861da177e4SLinus Torvalds static 12871da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 12881da177e4SLinus Torvalds { 12891da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 12901da177e4SLinus Torvalds struct task_struct *t; 12911da177e4SLinus Torvalds 12921da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 12931da177e4SLinus Torvalds if (!dp) 12941da177e4SLinus Torvalds return; 12951da177e4SLinus Torvalds 12961da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 12971da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 12981da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 12991da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13001da177e4SLinus Torvalds * it's safe to take a reference: */ 13011da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1302cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds spin_lock(&recall_lock); 13051da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13061da177e4SLinus Torvalds spin_unlock(&recall_lock); 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13091da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13101da177e4SLinus Torvalds 13110272e1fdSJ. Bruce Fields /* 13120272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13130272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13140272e1fdSJ. Bruce Fields * in time. 13150272e1fdSJ. Bruce Fields */ 13160272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13191da177e4SLinus Torvalds if (IS_ERR(t)) { 13201da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13211da177e4SLinus Torvalds 13221da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13231da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13241da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1325cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13261da177e4SLinus Torvalds nfs4_put_delegation(dp); 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds } 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds /* 13311da177e4SLinus Torvalds * The file_lock is being reapd. 13321da177e4SLinus Torvalds * 13331da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13341da177e4SLinus Torvalds */ 13351da177e4SLinus Torvalds static 13361da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13371da177e4SLinus Torvalds { 13381da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13391da177e4SLinus Torvalds 13401da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13431da177e4SLinus Torvalds return; 13441da177e4SLinus Torvalds dp->dl_flock = NULL; 13451da177e4SLinus Torvalds } 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds /* 13481da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13491da177e4SLinus Torvalds * 1350a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 13511da177e4SLinus Torvalds */ 13521da177e4SLinus Torvalds static 13531da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13541da177e4SLinus Torvalds { 13551da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 13581da177e4SLinus Torvalds if (!dp) 13591da177e4SLinus Torvalds return; 13601da177e4SLinus Torvalds dp->dl_flock = new; 13611da177e4SLinus Torvalds } 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds /* 1364a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 13651da177e4SLinus Torvalds */ 13661da177e4SLinus Torvalds static 13671da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 13681da177e4SLinus Torvalds { 13691da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 13701da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 13711da177e4SLinus Torvalds struct nfs4_delegation *tryd = 13721da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 13751da177e4SLinus Torvalds return 0; 13761da177e4SLinus Torvalds 13771da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds static 13821da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 13831da177e4SLinus Torvalds { 13841da177e4SLinus Torvalds if (arg & F_UNLCK) 13851da177e4SLinus Torvalds return lease_modify(onlist, arg); 13861da177e4SLinus Torvalds else 13871da177e4SLinus Torvalds return -EAGAIN; 13881da177e4SLinus Torvalds } 13891da177e4SLinus Torvalds 1390fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 13911da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 13921da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 13931da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 13941da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 13951da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 13961da177e4SLinus Torvalds }; 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds 1399b37ad28bSAl Viro __be32 14001da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14011da177e4SLinus Torvalds { 14021da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14031da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14041da177e4SLinus Torvalds unsigned int strhashval; 14051da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14080f442aa2SJ. Bruce Fields return nfserr_inval; 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14111da177e4SLinus Torvalds return nfserr_stale_clientid; 14121da177e4SLinus Torvalds 14131da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14141da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14151da177e4SLinus Torvalds open->op_stateowner = sop; 14160f442aa2SJ. Bruce Fields if (!sop) { 14170f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14180f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14190f442aa2SJ. Bruce Fields if (clp == NULL) 14200f442aa2SJ. Bruce Fields return nfserr_expired; 14210f442aa2SJ. Bruce Fields goto renew; 14220f442aa2SJ. Bruce Fields } 1423ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14240f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1425ae8b6253SJ. Bruce Fields clp = sop->so_client; 1426ae8b6253SJ. Bruce Fields release_stateowner(sop); 14270f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1428ae8b6253SJ. Bruce Fields goto renew; 14290f442aa2SJ. Bruce Fields } 14300f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14311da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1432a90b061cSAl Viro return nfserr_replay_me; 14331da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14341da177e4SLinus Torvalds * that we don't even have replay data saved! 14351da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14361da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14371da177e4SLinus Torvalds * fail again for the same reason. 14381da177e4SLinus Torvalds */ 14390f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14401da177e4SLinus Torvalds goto renew; 14411da177e4SLinus Torvalds } 14420f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14430f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14440f442aa2SJ. Bruce Fields renew: 14450f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14461da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14471da177e4SLinus Torvalds if (sop == NULL) 14480f442aa2SJ. Bruce Fields return nfserr_resource; 14491da177e4SLinus Torvalds open->op_stateowner = sop; 14500f442aa2SJ. Bruce Fields } 14510f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14521da177e4SLinus Torvalds renew_client(sop->so_client); 14530f442aa2SJ. Bruce Fields return nfs_ok; 14541da177e4SLinus Torvalds } 14551da177e4SLinus Torvalds 1456b37ad28bSAl Viro static inline __be32 14574a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 14584a6e43e6SNeilBrown { 14594a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 14604a6e43e6SNeilBrown return nfserr_openmode; 14614a6e43e6SNeilBrown else 14624a6e43e6SNeilBrown return nfs_ok; 14634a6e43e6SNeilBrown } 14644a6e43e6SNeilBrown 146552f4fb43SNeilBrown static struct nfs4_delegation * 146652f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 146752f4fb43SNeilBrown { 146852f4fb43SNeilBrown struct nfs4_delegation *dp; 146952f4fb43SNeilBrown 1470ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 147152f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 147252f4fb43SNeilBrown return dp; 147352f4fb43SNeilBrown } 147452f4fb43SNeilBrown return NULL; 147552f4fb43SNeilBrown } 147652f4fb43SNeilBrown 1477b37ad28bSAl Viro static __be32 1478567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1479567d9829SNeilBrown struct nfs4_delegation **dp) 1480567d9829SNeilBrown { 1481567d9829SNeilBrown int flags; 1482b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1483567d9829SNeilBrown 1484567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1485567d9829SNeilBrown if (*dp == NULL) 1486c44c5eebSNeilBrown goto out; 1487567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1488567d9829SNeilBrown RD_STATE : WR_STATE; 1489567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1490567d9829SNeilBrown if (status) 1491567d9829SNeilBrown *dp = NULL; 1492c44c5eebSNeilBrown out: 1493c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1494c44c5eebSNeilBrown return nfs_ok; 1495c44c5eebSNeilBrown if (status) 1496c44c5eebSNeilBrown return status; 1497c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1498c44c5eebSNeilBrown return nfs_ok; 1499567d9829SNeilBrown } 1500567d9829SNeilBrown 1501b37ad28bSAl Viro static __be32 15021da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15031da177e4SLinus Torvalds { 15041da177e4SLinus Torvalds struct nfs4_stateid *local; 1505b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15061da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15071da177e4SLinus Torvalds 15088beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15091da177e4SLinus Torvalds /* ignore lock owners */ 15101da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15111da177e4SLinus Torvalds continue; 15121da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15131da177e4SLinus Torvalds if (local->st_stateowner == sop) 15141da177e4SLinus Torvalds *stpp = local; 15151da177e4SLinus Torvalds /* check for conflicting share reservations */ 15161da177e4SLinus Torvalds if (!test_share(local, open)) 15171da177e4SLinus Torvalds goto out; 15181da177e4SLinus Torvalds } 15191da177e4SLinus Torvalds status = 0; 15201da177e4SLinus Torvalds out: 15211da177e4SLinus Torvalds return status; 15221da177e4SLinus Torvalds } 15231da177e4SLinus Torvalds 15245ac049acSNeilBrown static inline struct nfs4_stateid * 15255ac049acSNeilBrown nfs4_alloc_stateid(void) 15265ac049acSNeilBrown { 15275ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15285ac049acSNeilBrown } 15295ac049acSNeilBrown 1530b37ad28bSAl Viro static __be32 15311da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1532567d9829SNeilBrown struct nfs4_delegation *dp, 15331da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15341da177e4SLinus Torvalds { 15351da177e4SLinus Torvalds struct nfs4_stateid *stp; 15361da177e4SLinus Torvalds 15375ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15381da177e4SLinus Torvalds if (stp == NULL) 15391da177e4SLinus Torvalds return nfserr_resource; 15401da177e4SLinus Torvalds 1541567d9829SNeilBrown if (dp) { 1542567d9829SNeilBrown get_file(dp->dl_vfs_file); 1543567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1544567d9829SNeilBrown } else { 1545b37ad28bSAl Viro __be32 status; 1546567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1547567d9829SNeilBrown &stp->st_vfs_file); 15481da177e4SLinus Torvalds if (status) { 15491da177e4SLinus Torvalds if (status == nfserr_dropit) 15501da177e4SLinus Torvalds status = nfserr_jukebox; 15515ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15521da177e4SLinus Torvalds return status; 15531da177e4SLinus Torvalds } 1554567d9829SNeilBrown } 15551da177e4SLinus Torvalds *stpp = stp; 15561da177e4SLinus Torvalds return 0; 15571da177e4SLinus Torvalds } 15581da177e4SLinus Torvalds 1559b37ad28bSAl Viro static inline __be32 15601da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 15611da177e4SLinus Torvalds struct nfsd4_open *open) 15621da177e4SLinus Torvalds { 15631da177e4SLinus Torvalds struct iattr iattr = { 15641da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 15651da177e4SLinus Torvalds .ia_size = 0, 15661da177e4SLinus Torvalds }; 15671da177e4SLinus Torvalds if (!open->op_truncate) 15681da177e4SLinus Torvalds return 0; 15691da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 15709246585aSAl Viro return nfserr_inval; 15711da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 15721da177e4SLinus Torvalds } 15731da177e4SLinus Torvalds 1574b37ad28bSAl Viro static __be32 15751da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 15761da177e4SLinus Torvalds { 15771da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 15787eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 15796c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1580b37ad28bSAl Viro __be32 status; 15811da177e4SLinus Torvalds 15821da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 15836c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 15846c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 15851da177e4SLinus Torvalds 15866c26d08fSJ. Bruce Fields if (new_writer) { 1587b37ad28bSAl Viro int err = get_write_access(inode); 1588b37ad28bSAl Viro if (err) 1589b37ad28bSAl Viro return nfserrno(err); 1590e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 1591e518f056SBenny Halevy if (err) 1592e518f056SBenny Halevy return nfserrno(err); 1593e518f056SBenny Halevy file_take_write(filp); 15946c26d08fSJ. Bruce Fields } 15951da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 15961da177e4SLinus Torvalds if (status) { 15976c26d08fSJ. Bruce Fields if (new_writer) 15981da177e4SLinus Torvalds put_write_access(inode); 15991da177e4SLinus Torvalds return status; 16001da177e4SLinus Torvalds } 16011da177e4SLinus Torvalds /* remember the open */ 16026c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 1603b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 1604b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16051da177e4SLinus Torvalds 16061da177e4SLinus Torvalds return nfs_ok; 16071da177e4SLinus Torvalds } 16081da177e4SLinus Torvalds 16091da177e4SLinus Torvalds 16101da177e4SLinus Torvalds static void 161137515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16121da177e4SLinus Torvalds { 16131da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1614c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16151da177e4SLinus Torvalds } 16161da177e4SLinus Torvalds 16171da177e4SLinus Torvalds /* 16181da177e4SLinus Torvalds * Attempt to hand out a delegation. 16191da177e4SLinus Torvalds */ 16201da177e4SLinus Torvalds static void 16211da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16221da177e4SLinus Torvalds { 16231da177e4SLinus Torvalds struct nfs4_delegation *dp; 16241da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16251da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16261da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16271da177e4SLinus Torvalds int status, flag = 0; 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16307b190fecSNeilBrown open->op_recall = 0; 16317b190fecSNeilBrown switch (open->op_claim_type) { 16327b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16337b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16347b190fecSNeilBrown open->op_recall = 1; 16357b190fecSNeilBrown flag = open->op_delegate_type; 16367b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16371da177e4SLinus Torvalds goto out; 16387b190fecSNeilBrown break; 16397b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16407b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16417b190fecSNeilBrown * had the chance to reclaim theirs.... */ 1642af558e33SJ. Bruce Fields if (locks_in_grace()) 16437b190fecSNeilBrown goto out; 16447b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16457b190fecSNeilBrown goto out; 16461da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16471da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16481da177e4SLinus Torvalds else 16491da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16507b190fecSNeilBrown break; 16517b190fecSNeilBrown default: 16527b190fecSNeilBrown goto out; 16537b190fecSNeilBrown } 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16561da177e4SLinus Torvalds if (dp == NULL) { 16571da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16581da177e4SLinus Torvalds goto out; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds locks_init_lock(&fl); 16611da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 16621da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 16639167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 16641da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 16651da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 16661da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 16671da177e4SLinus Torvalds fl.fl_pid = current->tgid; 16681da177e4SLinus Torvalds 1669a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 16701da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 16711da177e4SLinus Torvalds */ 16729167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 16731da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1674c907132dSNeilBrown unhash_delegation(dp); 16751da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16761da177e4SLinus Torvalds goto out; 16771da177e4SLinus Torvalds } 16781da177e4SLinus Torvalds 16791da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 16801da177e4SLinus Torvalds 16811da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 16821da177e4SLinus Torvalds dp->dl_stateid.si_boot, 16831da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 16841da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 16851da177e4SLinus Torvalds dp->dl_stateid.si_generation); 16861da177e4SLinus Torvalds out: 16877b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 16887b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 16897b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 16902fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 16911da177e4SLinus Torvalds open->op_delegate_type = flag; 16921da177e4SLinus Torvalds } 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds /* 16951da177e4SLinus Torvalds * called with nfs4_lock_state() held. 16961da177e4SLinus Torvalds */ 1697b37ad28bSAl Viro __be32 16981da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 16991da177e4SLinus Torvalds { 17001da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17011da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17021da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1703567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1704b37ad28bSAl Viro __be32 status; 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds status = nfserr_inval; 1707ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1708ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17091da177e4SLinus Torvalds goto out; 17101da177e4SLinus Torvalds /* 17111da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17121da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17131da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17141da177e4SLinus Torvalds */ 17151da177e4SLinus Torvalds fp = find_file(ino); 17161da177e4SLinus Torvalds if (fp) { 17171da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17181da177e4SLinus Torvalds goto out; 1719c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1720c44c5eebSNeilBrown if (status) 1721c44c5eebSNeilBrown goto out; 17221da177e4SLinus Torvalds } else { 1723c44c5eebSNeilBrown status = nfserr_bad_stateid; 1724c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1725c44c5eebSNeilBrown goto out; 17261da177e4SLinus Torvalds status = nfserr_resource; 17271da177e4SLinus Torvalds fp = alloc_init_file(ino); 17281da177e4SLinus Torvalds if (fp == NULL) 17291da177e4SLinus Torvalds goto out; 17301da177e4SLinus Torvalds } 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds /* 17331da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17341da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17351da177e4SLinus Torvalds */ 17361da177e4SLinus Torvalds if (stp) { 17371da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17381da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17391da177e4SLinus Torvalds if (status) 17401da177e4SLinus Torvalds goto out; 1741444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17421da177e4SLinus Torvalds } else { 17431da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17441da177e4SLinus Torvalds int flags = 0; 17459ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17468837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 17471da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17488837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 1749567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1750567d9829SNeilBrown if (status) 17511da177e4SLinus Torvalds goto out; 17521da177e4SLinus Torvalds init_stateid(stp, fp, open); 17531da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17541da177e4SLinus Torvalds if (status) { 17551da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17561da177e4SLinus Torvalds goto out; 17571da177e4SLinus Torvalds } 17581da177e4SLinus Torvalds } 17591da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds /* 17621da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 17631da177e4SLinus Torvalds * OPEN succeeds even if we fail. 17641da177e4SLinus Torvalds */ 17651da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 17661da177e4SLinus Torvalds 17671da177e4SLinus Torvalds status = nfs_ok; 17681da177e4SLinus Torvalds 17691da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 17701da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 17711da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 17721da177e4SLinus Torvalds out: 177313cd2184SNeilBrown if (fp) 177413cd2184SNeilBrown put_nfs4_file(fp); 177537515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 177637515177SNeilBrown nfs4_set_claim_prev(open); 17771da177e4SLinus Torvalds /* 17781da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 17791da177e4SLinus Torvalds */ 17801da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 17811da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 17821da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 17831da177e4SLinus Torvalds 17841da177e4SLinus Torvalds return status; 17851da177e4SLinus Torvalds } 17861da177e4SLinus Torvalds 1787b37ad28bSAl Viro __be32 1788b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1789b591480bSJ.Bruce Fields clientid_t *clid) 17901da177e4SLinus Torvalds { 17911da177e4SLinus Torvalds struct nfs4_client *clp; 1792b37ad28bSAl Viro __be32 status; 17931da177e4SLinus Torvalds 17941da177e4SLinus Torvalds nfs4_lock_state(); 17951da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 17961da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 17971da177e4SLinus Torvalds status = nfserr_stale_clientid; 17981da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 17991da177e4SLinus Torvalds goto out; 18001da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18011da177e4SLinus Torvalds status = nfserr_expired; 18021da177e4SLinus Torvalds if (clp == NULL) { 18031da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18041da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18051da177e4SLinus Torvalds goto out; 18061da177e4SLinus Torvalds } 18071da177e4SLinus Torvalds renew_client(clp); 18081da177e4SLinus Torvalds status = nfserr_cb_path_down; 1809ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18101da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18111da177e4SLinus Torvalds goto out; 18121da177e4SLinus Torvalds status = nfs_ok; 18131da177e4SLinus Torvalds out: 18141da177e4SLinus Torvalds nfs4_unlock_state(); 18151da177e4SLinus Torvalds return status; 18161da177e4SLinus Torvalds } 18171da177e4SLinus Torvalds 1818af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 1819af558e33SJ. Bruce Fields }; 1820af558e33SJ. Bruce Fields 1821a76b4319SNeilBrown static void 1822af558e33SJ. Bruce Fields nfsd4_end_grace(void) 1823a76b4319SNeilBrown { 1824a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1825c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1826af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 1827a76b4319SNeilBrown } 1828a76b4319SNeilBrown 1829fd39ca9aSNeilBrown static time_t 18301da177e4SLinus Torvalds nfs4_laundromat(void) 18311da177e4SLinus Torvalds { 18321da177e4SLinus Torvalds struct nfs4_client *clp; 18331da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18341da177e4SLinus Torvalds struct nfs4_delegation *dp; 18351da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18361da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18371da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18381da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18391da177e4SLinus Torvalds 18401da177e4SLinus Torvalds nfs4_lock_state(); 18411da177e4SLinus Torvalds 18421da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1843af558e33SJ. Bruce Fields if (locks_in_grace()) 1844af558e33SJ. Bruce Fields nfsd4_end_grace(); 18451da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18461da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18471da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18481da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18491da177e4SLinus Torvalds if (clientid_val > t) 18501da177e4SLinus Torvalds clientid_val = t; 18511da177e4SLinus Torvalds break; 18521da177e4SLinus Torvalds } 18531da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18541da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1855c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18561da177e4SLinus Torvalds expire_client(clp); 18571da177e4SLinus Torvalds } 18581da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 18591da177e4SLinus Torvalds spin_lock(&recall_lock); 18601da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 18611da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18621da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 18631da177e4SLinus Torvalds u = dp->dl_time - cutoff; 18641da177e4SLinus Torvalds if (test_val > u) 18651da177e4SLinus Torvalds test_val = u; 18661da177e4SLinus Torvalds break; 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 18691da177e4SLinus Torvalds dp, dp->dl_flock); 18701da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 18711da177e4SLinus Torvalds } 18721da177e4SLinus Torvalds spin_unlock(&recall_lock); 18731da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 18741da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18751da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 18761da177e4SLinus Torvalds unhash_delegation(dp); 18771da177e4SLinus Torvalds } 18781da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 18791da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 18801da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 18811da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 18821da177e4SLinus Torvalds u = sop->so_time - cutoff; 18831da177e4SLinus Torvalds if (test_val > u) 18841da177e4SLinus Torvalds test_val = u; 18851da177e4SLinus Torvalds break; 18861da177e4SLinus Torvalds } 18871da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 18881da177e4SLinus Torvalds sop->so_id); 1889358dd55aSNeilBrown release_stateowner(sop); 18901da177e4SLinus Torvalds } 18911da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 18921da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 18931da177e4SLinus Torvalds nfs4_unlock_state(); 18941da177e4SLinus Torvalds return clientid_val; 18951da177e4SLinus Torvalds } 18961da177e4SLinus Torvalds 1897a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 1898a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 1899a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 1900a254b246SHarvey Harrison 1901a254b246SHarvey Harrison static void 1902c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19031da177e4SLinus Torvalds { 19041da177e4SLinus Torvalds time_t t; 19051da177e4SLinus Torvalds 19061da177e4SLinus Torvalds t = nfs4_laundromat(); 19071da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 190858da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds 1911fd39ca9aSNeilBrown static struct nfs4_stateowner * 1912f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1913f8816512SNeilBrown { 19141da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19151da177e4SLinus Torvalds 19161da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19171da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19181da177e4SLinus Torvalds if (local->so_id == st_id) 19191da177e4SLinus Torvalds return local; 19201da177e4SLinus Torvalds } 19211da177e4SLinus Torvalds } 19221da177e4SLinus Torvalds return NULL; 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds 19251da177e4SLinus Torvalds static inline int 19261da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19271da177e4SLinus Torvalds { 19287eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds 19311da177e4SLinus Torvalds static int 19321da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19331da177e4SLinus Torvalds { 19341da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19351da177e4SLinus Torvalds return 0; 1936849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19371da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19381da177e4SLinus Torvalds stateid->si_generation); 19391da177e4SLinus Torvalds return 1; 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds 19421da177e4SLinus Torvalds static inline int 19431da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19441da177e4SLinus Torvalds { 19451da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19461da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19471da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19481da177e4SLinus Torvalds } 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds static inline int 19511da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19521da177e4SLinus Torvalds { 19531da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19541da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19551da177e4SLinus Torvalds } 19561da177e4SLinus Torvalds 19571da177e4SLinus Torvalds static 1958b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19591da177e4SLinus Torvalds { 1960b37ad28bSAl Viro __be32 status = nfserr_openmode; 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 19631da177e4SLinus Torvalds goto out; 19641da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 19651da177e4SLinus Torvalds goto out; 19661da177e4SLinus Torvalds status = nfs_ok; 19671da177e4SLinus Torvalds out: 19681da177e4SLinus Torvalds return status; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds 1971b37ad28bSAl Viro static inline __be32 19721da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 19731da177e4SLinus Torvalds { 19741da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 19751da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 19761da177e4SLinus Torvalds return nfserr_bad_stateid; 19771da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 19781da177e4SLinus Torvalds return nfs_ok; 1979af558e33SJ. Bruce Fields else if (locks_in_grace()) { 19801da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 19811da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 19821da177e4SLinus Torvalds return nfserr_grace; 19831da177e4SLinus Torvalds } else if (flags & WR_STATE) 19841da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 19851da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 19861da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 19871da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 19881da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds /* 19921da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 19931da177e4SLinus Torvalds * that are not able to provide mandatory locking. 19941da177e4SLinus Torvalds */ 19951da177e4SLinus Torvalds static inline int 19961da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 19971da177e4SLinus Torvalds { 1998af558e33SJ. Bruce Fields return locks_in_grace() && (flags & (RD_STATE | WR_STATE)) 1999a16877caSPavel Emelyanov && mandatory_lock(inode); 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds 20020836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 20030836f587SJ. Bruce Fields { 20040836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 20050836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 20060836f587SJ. Bruce Fields return nfserr_bad_stateid; 20070836f587SJ. Bruce Fields /* 20080836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 20090836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 20100836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 20110836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 20120836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 20130836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 20140836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 20150836f587SJ. Bruce Fields * will just have to retry the IO: 20160836f587SJ. Bruce Fields */ 20170836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 20180836f587SJ. Bruce Fields return nfserr_old_stateid; 20190836f587SJ. Bruce Fields return nfs_ok; 20200836f587SJ. Bruce Fields } 20210836f587SJ. Bruce Fields 20221da177e4SLinus Torvalds /* 20231da177e4SLinus Torvalds * Checks for stateid operations 20241da177e4SLinus Torvalds */ 2025b37ad28bSAl Viro __be32 20261da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20271da177e4SLinus Torvalds { 20281da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20291da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20301da177e4SLinus Torvalds stateid_t *stidp; 20311da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2032b37ad28bSAl Viro __be32 status; 20331da177e4SLinus Torvalds 20341da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20351da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20361da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20371da177e4SLinus Torvalds if (filpp) 20381da177e4SLinus Torvalds *filpp = NULL; 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20411da177e4SLinus Torvalds return nfserr_grace; 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20441da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20451da177e4SLinus Torvalds 20461da177e4SLinus Torvalds /* STALE STATEID */ 20471da177e4SLinus Torvalds status = nfserr_stale_stateid; 20481da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20491da177e4SLinus Torvalds goto out; 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds /* BAD STATEID */ 20521da177e4SLinus Torvalds status = nfserr_bad_stateid; 20531da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20541da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20551da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20561da177e4SLinus Torvalds goto out; 20571da177e4SLinus Torvalds } 20581da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20591da177e4SLinus Torvalds } else { /* open or lock stateid */ 20601da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20611da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20621da177e4SLinus Torvalds goto out; 20631da177e4SLinus Torvalds } 20641da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20651da177e4SLinus Torvalds goto out; 20661da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20671da177e4SLinus Torvalds goto out; 20681da177e4SLinus Torvalds stidp = &stp->st_stateid; 20691da177e4SLinus Torvalds } 20700836f587SJ. Bruce Fields status = check_stateid_generation(stateid, stidp); 20710836f587SJ. Bruce Fields if (status) 20721da177e4SLinus Torvalds goto out; 20731da177e4SLinus Torvalds if (stp) { 20741da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 20751da177e4SLinus Torvalds goto out; 20761da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 20771da177e4SLinus Torvalds if (filpp) 20781da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 20796a85fa3aSJ. Bruce Fields } else { 20801da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 20811da177e4SLinus Torvalds goto out; 20821da177e4SLinus Torvalds renew_client(dp->dl_client); 20831da177e4SLinus Torvalds if (flags & DELEG_RET) 20841da177e4SLinus Torvalds unhash_delegation(dp); 20851da177e4SLinus Torvalds if (filpp) 20861da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 20871da177e4SLinus Torvalds } 20881da177e4SLinus Torvalds status = nfs_ok; 20891da177e4SLinus Torvalds out: 20901da177e4SLinus Torvalds return status; 20911da177e4SLinus Torvalds } 20921da177e4SLinus Torvalds 20934c4cd222SNeilBrown static inline int 20944c4cd222SNeilBrown setlkflg (int type) 20954c4cd222SNeilBrown { 20964c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 20974c4cd222SNeilBrown RD_STATE : WR_STATE; 20984c4cd222SNeilBrown } 20991da177e4SLinus Torvalds 21001da177e4SLinus Torvalds /* 21011da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21021da177e4SLinus Torvalds */ 2103b37ad28bSAl Viro static __be32 21044c4cd222SNeilBrown nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 21051da177e4SLinus Torvalds { 21061da177e4SLinus Torvalds struct nfs4_stateid *stp; 21071da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21080836f587SJ. Bruce Fields __be32 status; 21091da177e4SLinus Torvalds 21101da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21111da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21121da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21131da177e4SLinus Torvalds stateid->si_generation); 21141da177e4SLinus Torvalds 21151da177e4SLinus Torvalds *stpp = NULL; 21161da177e4SLinus Torvalds *sopp = NULL; 21171da177e4SLinus Torvalds 21181da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21192fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21203a4f98bbSNeilBrown return nfserr_bad_stateid; 21211da177e4SLinus Torvalds } 21221da177e4SLinus Torvalds 21231da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21243a4f98bbSNeilBrown return nfserr_stale_stateid; 21251da177e4SLinus Torvalds /* 21261da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21271da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21281da177e4SLinus Torvalds * number is incorrect. 21291da177e4SLinus Torvalds */ 2130f8816512SNeilBrown stp = find_stateid(stateid, flags); 2131f8816512SNeilBrown if (stp == NULL) { 2132f8816512SNeilBrown /* 2133f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2134f8816512SNeilBrown * a replayed close: 2135f8816512SNeilBrown */ 2136f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2137f8816512SNeilBrown if (sop == NULL) 2138f8816512SNeilBrown return nfserr_bad_stateid; 2139f8816512SNeilBrown *sopp = sop; 2140f8816512SNeilBrown goto check_replay; 2141f8816512SNeilBrown } 21421da177e4SLinus Torvalds 214339325bd0SJ. Bruce Fields *stpp = stp; 214439325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 214539325bd0SJ. Bruce Fields 21464c4cd222SNeilBrown if (lock) { 21474c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21481da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21494c4cd222SNeilBrown int lkflg = 0; 2150b37ad28bSAl Viro __be32 status; 21511da177e4SLinus Torvalds 21524c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21534c4cd222SNeilBrown 21544c4cd222SNeilBrown if (lock->lk_is_new) { 21551da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21563a4f98bbSNeilBrown return nfserr_bad_stateid; 2157599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 21583a4f98bbSNeilBrown return nfserr_bad_stateid; 21594c4cd222SNeilBrown /* stp is the open stateid */ 21604c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21614c4cd222SNeilBrown if (status) 21624c4cd222SNeilBrown return status; 21634c4cd222SNeilBrown } else { 21644c4cd222SNeilBrown /* stp is the lock stateid */ 21654c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21664c4cd222SNeilBrown if (status) 21674c4cd222SNeilBrown return status; 21684c4cd222SNeilBrown } 21691da177e4SLinus Torvalds } 21701da177e4SLinus Torvalds 2171f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 21722fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21733a4f98bbSNeilBrown return nfserr_bad_stateid; 21741da177e4SLinus Torvalds } 21751da177e4SLinus Torvalds 21761da177e4SLinus Torvalds /* 21771da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 21781da177e4SLinus Torvalds * For the moment, we ignore the possibility of 21791da177e4SLinus Torvalds * generation number wraparound. 21801da177e4SLinus Torvalds */ 2181bd9aac52SNeilBrown if (seqid != sop->so_seqid) 21821da177e4SLinus Torvalds goto check_replay; 21831da177e4SLinus Torvalds 21843a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 21852fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 21863a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 21873a4f98bbSNeilBrown return nfserr_bad_stateid; 21881da177e4SLinus Torvalds } 21893a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 21902fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 21913a4f98bbSNeilBrown " confirmed yet!\n"); 21923a4f98bbSNeilBrown return nfserr_bad_stateid; 21931da177e4SLinus Torvalds } 21940836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 21950836f587SJ. Bruce Fields if (status) 21960836f587SJ. Bruce Fields return status; 219752fd004eSNeilBrown renew_client(sop->so_client); 21983a4f98bbSNeilBrown return nfs_ok; 21991da177e4SLinus Torvalds 22001da177e4SLinus Torvalds check_replay: 2201bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2202849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22031da177e4SLinus Torvalds /* indicate replay to calling function */ 2204a90b061cSAl Viro return nfserr_replay_me; 22051da177e4SLinus Torvalds } 22062fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22073a4f98bbSNeilBrown sop->so_seqid, seqid); 22083a4f98bbSNeilBrown *sopp = NULL; 22093a4f98bbSNeilBrown return nfserr_bad_seqid; 22101da177e4SLinus Torvalds } 22111da177e4SLinus Torvalds 2212b37ad28bSAl Viro __be32 2213ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2214a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22151da177e4SLinus Torvalds { 2216b37ad28bSAl Viro __be32 status; 22171da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22181da177e4SLinus Torvalds struct nfs4_stateid *stp; 22191da177e4SLinus Torvalds 22201da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2221ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2222ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22231da177e4SLinus Torvalds 2224ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2225a8cddc5dSJ. Bruce Fields if (status) 2226a8cddc5dSJ. Bruce Fields return status; 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds nfs4_lock_state(); 22291da177e4SLinus Torvalds 2230ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2231ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2232f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 22331da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22341da177e4SLinus Torvalds goto out; 22351da177e4SLinus Torvalds 22361da177e4SLinus Torvalds sop = oc->oc_stateowner; 22371da177e4SLinus Torvalds sop->so_confirmed = 1; 22381da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22391da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22401da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22411da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22421da177e4SLinus Torvalds stp->st_stateid.si_boot, 22431da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22441da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22451da177e4SLinus Torvalds stp->st_stateid.si_generation); 2246c7b9a459SNeilBrown 2247c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22481da177e4SLinus Torvalds out: 2249f2327d9aSNeil Brown if (oc->oc_stateowner) { 22501da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2251a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2252f2327d9aSNeil Brown } 22531da177e4SLinus Torvalds nfs4_unlock_state(); 22541da177e4SLinus Torvalds return status; 22551da177e4SLinus Torvalds } 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds 22581da177e4SLinus Torvalds /* 22591da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22601da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22611da177e4SLinus Torvalds */ 22621da177e4SLinus Torvalds static void 22631da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22641da177e4SLinus Torvalds { 22651da177e4SLinus Torvalds int i; 22661da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22671da177e4SLinus Torvalds if ((i & access) != i) 22681da177e4SLinus Torvalds __clear_bit(i, bmap); 22691da177e4SLinus Torvalds } 22701da177e4SLinus Torvalds } 22711da177e4SLinus Torvalds 22721da177e4SLinus Torvalds static void 22731da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 22741da177e4SLinus Torvalds { 22751da177e4SLinus Torvalds int i; 22761da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22771da177e4SLinus Torvalds if ((i & deny) != i) 22781da177e4SLinus Torvalds __clear_bit(i, bmap); 22791da177e4SLinus Torvalds } 22801da177e4SLinus Torvalds } 22811da177e4SLinus Torvalds 2282b37ad28bSAl Viro __be32 2283ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2284ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2285a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 22861da177e4SLinus Torvalds { 2287b37ad28bSAl Viro __be32 status; 22881da177e4SLinus Torvalds struct nfs4_stateid *stp; 22891da177e4SLinus Torvalds unsigned int share_access; 22901da177e4SLinus Torvalds 22911da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2292ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2293ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22941da177e4SLinus Torvalds 2295ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2296ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 22971da177e4SLinus Torvalds return nfserr_inval; 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds nfs4_lock_state(); 2300ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2301ca364317SJ.Bruce Fields od->od_seqid, 23021da177e4SLinus Torvalds &od->od_stateid, 2303f3362737SJ. Bruce Fields OPEN_STATE, 23041da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23051da177e4SLinus Torvalds goto out; 23061da177e4SLinus Torvalds 23071da177e4SLinus Torvalds status = nfserr_inval; 23081da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23091da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23101da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23111da177e4SLinus Torvalds goto out; 23121da177e4SLinus Torvalds } 23131da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23141da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23151da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23161da177e4SLinus Torvalds goto out; 23171da177e4SLinus Torvalds } 23181da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23191da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23201da177e4SLinus Torvalds share_access & ~od->od_share_access); 23211da177e4SLinus Torvalds 23221da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23231da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23241da177e4SLinus Torvalds 23251da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23261da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23271da177e4SLinus Torvalds status = nfs_ok; 23281da177e4SLinus Torvalds out: 2329f2327d9aSNeil Brown if (od->od_stateowner) { 23301da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2331a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2332f2327d9aSNeil Brown } 23331da177e4SLinus Torvalds nfs4_unlock_state(); 23341da177e4SLinus Torvalds return status; 23351da177e4SLinus Torvalds } 23361da177e4SLinus Torvalds 23371da177e4SLinus Torvalds /* 23381da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23391da177e4SLinus Torvalds */ 2340b37ad28bSAl Viro __be32 2341ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2342a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23431da177e4SLinus Torvalds { 2344b37ad28bSAl Viro __be32 status; 23451da177e4SLinus Torvalds struct nfs4_stateid *stp; 23461da177e4SLinus Torvalds 23471da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2348ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2349ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23501da177e4SLinus Torvalds 23511da177e4SLinus Torvalds nfs4_lock_state(); 23521da177e4SLinus Torvalds /* check close_lru for replay */ 2353ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2354ca364317SJ.Bruce Fields close->cl_seqid, 23551da177e4SLinus Torvalds &close->cl_stateid, 2356f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 23571da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23581da177e4SLinus Torvalds goto out; 23591da177e4SLinus Torvalds status = nfs_ok; 23601da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23611da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23621da177e4SLinus Torvalds 236304ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 236404ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 236504ef5954SJ. Bruce Fields 236604ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 236704ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 236804ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 236904ef5954SJ. Bruce Fields */ 237004ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 237104ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23721da177e4SLinus Torvalds out: 2373f2327d9aSNeil Brown if (close->cl_stateowner) { 23741da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2375a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2376f2327d9aSNeil Brown } 23771da177e4SLinus Torvalds nfs4_unlock_state(); 23781da177e4SLinus Torvalds return status; 23791da177e4SLinus Torvalds } 23801da177e4SLinus Torvalds 2381b37ad28bSAl Viro __be32 2382ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2383ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 23841da177e4SLinus Torvalds { 2385b37ad28bSAl Viro __be32 status; 23861da177e4SLinus Torvalds 2387ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 23881da177e4SLinus Torvalds goto out; 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds nfs4_lock_state(); 2391ca364317SJ.Bruce Fields status = nfs4_preprocess_stateid_op(&cstate->current_fh, 2392ca364317SJ.Bruce Fields &dr->dr_stateid, DELEG_RET, NULL); 23931da177e4SLinus Torvalds nfs4_unlock_state(); 23941da177e4SLinus Torvalds out: 23951da177e4SLinus Torvalds return status; 23961da177e4SLinus Torvalds } 23971da177e4SLinus Torvalds 23981da177e4SLinus Torvalds 23991da177e4SLinus Torvalds /* 24001da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24011da177e4SLinus Torvalds */ 24021da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24031da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24041da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24051da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24081da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds static inline unsigned int 24111da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24121da177e4SLinus Torvalds struct xdr_netobj *ownername) 24131da177e4SLinus Torvalds { 24141da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24151da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24161da177e4SLinus Torvalds & LOCK_HASH_MASK; 24171da177e4SLinus Torvalds } 24181da177e4SLinus Torvalds 24191da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24201da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24211da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24221da177e4SLinus Torvalds 2423fd39ca9aSNeilBrown static struct nfs4_stateid * 24241da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24251da177e4SLinus Torvalds { 24261da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24271da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24281da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24291da177e4SLinus Torvalds unsigned int hashval; 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24321da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24331da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24341da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24351da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24361da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24371da177e4SLinus Torvalds return local; 24381da177e4SLinus Torvalds } 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24411da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24421da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24431da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24441da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24451da177e4SLinus Torvalds return local; 24461da177e4SLinus Torvalds } 2447849823c5SNeil Brown } 24481da177e4SLinus Torvalds return NULL; 24491da177e4SLinus Torvalds } 24501da177e4SLinus Torvalds 24511da177e4SLinus Torvalds static struct nfs4_delegation * 24521da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24531da177e4SLinus Torvalds { 245413cd2184SNeilBrown struct nfs4_file *fp; 245513cd2184SNeilBrown struct nfs4_delegation *dl; 24561da177e4SLinus Torvalds 24571da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24581da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24591da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24601da177e4SLinus Torvalds 24611da177e4SLinus Torvalds fp = find_file(ino); 246213cd2184SNeilBrown if (!fp) 24631da177e4SLinus Torvalds return NULL; 246413cd2184SNeilBrown dl = find_delegation_file(fp, stid); 246513cd2184SNeilBrown put_nfs4_file(fp); 246613cd2184SNeilBrown return dl; 24671da177e4SLinus Torvalds } 24681da177e4SLinus Torvalds 24691da177e4SLinus Torvalds /* 24701da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24711da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24721da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24731da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24741da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24751da177e4SLinus Torvalds * the VFS, but this is a very deep change! 24761da177e4SLinus Torvalds */ 24771da177e4SLinus Torvalds static inline void 24781da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 24791da177e4SLinus Torvalds { 24801da177e4SLinus Torvalds if (lock->fl_start < 0) 24811da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 24821da177e4SLinus Torvalds if (lock->fl_end < 0) 24831da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 24841da177e4SLinus Torvalds } 24851da177e4SLinus Torvalds 2486d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2487d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2488e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2489d5b9026aSNeilBrown }; 24901da177e4SLinus Torvalds 24911da177e4SLinus Torvalds static inline void 24921da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 24931da177e4SLinus Torvalds { 2494d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2495d5b9026aSNeilBrown unsigned int hval; 24961da177e4SLinus Torvalds 2497d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2498d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2499d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25001da177e4SLinus Torvalds kref_get(&sop->so_ref); 25011da177e4SLinus Torvalds deny->ld_sop = sop; 25021da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2503d5b9026aSNeilBrown } else { 2504d5b9026aSNeilBrown deny->ld_sop = NULL; 2505d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2506d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25071da177e4SLinus Torvalds } 25081da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25091da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25101da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25111da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25121da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25131da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25141da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25151da177e4SLinus Torvalds } 25161da177e4SLinus Torvalds 25171da177e4SLinus Torvalds static struct nfs4_stateowner * 25181da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25191da177e4SLinus Torvalds struct xdr_netobj *owner) 25201da177e4SLinus Torvalds { 25211da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25221da177e4SLinus Torvalds struct nfs4_stateowner *op; 25231da177e4SLinus Torvalds 25241da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2525599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 25261da177e4SLinus Torvalds return op; 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds return NULL; 25291da177e4SLinus Torvalds } 25301da177e4SLinus Torvalds 25311da177e4SLinus Torvalds /* 25321da177e4SLinus Torvalds * Alloc a lock owner structure. 25331da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25341da177e4SLinus Torvalds * occured. 25351da177e4SLinus Torvalds * 25361da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25371da177e4SLinus Torvalds */ 25381da177e4SLinus Torvalds 25391da177e4SLinus Torvalds static struct nfs4_stateowner * 25401da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25411da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25421da177e4SLinus Torvalds struct nfs4_replay *rp; 25431da177e4SLinus Torvalds unsigned int idhashval; 25441da177e4SLinus Torvalds 25451da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25461da177e4SLinus Torvalds return NULL; 25471da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25481da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25491da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25501da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2551ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2552ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25531da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25541da177e4SLinus Torvalds sop->so_time = 0; 25551da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25561da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2557ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25581da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25591da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25601da177e4SLinus Torvalds sop->so_client = clp; 2561b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2562b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2563b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25641da177e4SLinus Torvalds sop->so_confirmed = 1; 25651da177e4SLinus Torvalds rp = &sop->so_replay; 2566de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25671da177e4SLinus Torvalds rp->rp_buflen = 0; 25681da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25691da177e4SLinus Torvalds return sop; 25701da177e4SLinus Torvalds } 25711da177e4SLinus Torvalds 2572fd39ca9aSNeilBrown static struct nfs4_stateid * 25731da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25741da177e4SLinus Torvalds { 25751da177e4SLinus Torvalds struct nfs4_stateid *stp; 25761da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 25771da177e4SLinus Torvalds 25785ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25795ac049acSNeilBrown if (stp == NULL) 25801da177e4SLinus Torvalds goto out; 25811da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 25821da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2583ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2584ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 25851da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 25868beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2587ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 25881da177e4SLinus Torvalds stp->st_stateowner = sop; 258913cd2184SNeilBrown get_nfs4_file(fp); 25901da177e4SLinus Torvalds stp->st_file = fp; 25911da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 25921da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 25931da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 25941da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 25951da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 25961da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 25971da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 25984c4cd222SNeilBrown stp->st_openstp = open_stp; 25991da177e4SLinus Torvalds 26001da177e4SLinus Torvalds out: 26011da177e4SLinus Torvalds return stp; 26021da177e4SLinus Torvalds } 26031da177e4SLinus Torvalds 2604fd39ca9aSNeilBrown static int 26051da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26061da177e4SLinus Torvalds { 26071da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26081da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26091da177e4SLinus Torvalds } 26101da177e4SLinus Torvalds 26111da177e4SLinus Torvalds /* 26121da177e4SLinus Torvalds * LOCK operation 26131da177e4SLinus Torvalds */ 2614b37ad28bSAl Viro __be32 2615ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2616a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26171da177e4SLinus Torvalds { 26183e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2619b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26201da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26211da177e4SLinus Torvalds struct file *filp; 26221da177e4SLinus Torvalds struct file_lock file_lock; 26238dc7c311SAndy Adamson struct file_lock conflock; 2624b37ad28bSAl Viro __be32 status = 0; 26251da177e4SLinus Torvalds unsigned int strhashval; 2626150b3934SMarc Eshel unsigned int cmd; 2627b8dd7b9aSAl Viro int err; 26281da177e4SLinus Torvalds 26291da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26301da177e4SLinus Torvalds (long long) lock->lk_offset, 26311da177e4SLinus Torvalds (long long) lock->lk_length); 26321da177e4SLinus Torvalds 26331da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26341da177e4SLinus Torvalds return nfserr_inval; 26351da177e4SLinus Torvalds 2636ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 26378837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 2638a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2639a6f6ef2fSAndy Adamson return status; 2640a6f6ef2fSAndy Adamson } 2641a6f6ef2fSAndy Adamson 26421da177e4SLinus Torvalds nfs4_lock_state(); 26431da177e4SLinus Torvalds 26441da177e4SLinus Torvalds if (lock->lk_is_new) { 26451da177e4SLinus Torvalds /* 26461da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2647893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2648893f8770SNeilBrown * lock stateid. 26491da177e4SLinus Torvalds */ 26501da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26511da177e4SLinus Torvalds struct nfs4_file *fp; 26521da177e4SLinus Torvalds 26531da177e4SLinus Torvalds status = nfserr_stale_clientid; 2654849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26551da177e4SLinus Torvalds goto out; 26561da177e4SLinus Torvalds 26571da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2658ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26591da177e4SLinus Torvalds lock->lk_new_open_seqid, 26601da177e4SLinus Torvalds &lock->lk_new_open_stateid, 2661f3362737SJ. Bruce Fields OPEN_STATE, 26623a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2663b59e3c0eSNeil Brown lock); 266437515177SNeilBrown if (status) 26651da177e4SLinus Torvalds goto out; 26663a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26671da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26681da177e4SLinus Torvalds fp = open_stp->st_file; 26691da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26701da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26711da177e4SLinus Torvalds &lock->v.new.owner); 26723e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26733e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26743e9e3dbeSNeilBrown * create new stateids)? */ 26751da177e4SLinus Torvalds status = nfserr_resource; 2676b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2677b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2678b59e3c0eSNeil Brown if (lock_sop == NULL) 26791da177e4SLinus Torvalds goto out; 2680b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 26818a280510SJ. Bruce Fields if (lock_stp == NULL) 26821da177e4SLinus Torvalds goto out; 26831da177e4SLinus Torvalds } else { 26841da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2685ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26861da177e4SLinus Torvalds lock->lk_old_lock_seqid, 26871da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 2688f3362737SJ. Bruce Fields LOCK_STATE, 26893a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 26901da177e4SLinus Torvalds if (status) 26911da177e4SLinus Torvalds goto out; 26923a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 26931da177e4SLinus Torvalds } 26943a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 26951da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 26961da177e4SLinus Torvalds 26970dd395dcSNeilBrown status = nfserr_grace; 2698af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 26990dd395dcSNeilBrown goto out; 27000dd395dcSNeilBrown status = nfserr_no_grace; 2701af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 27020dd395dcSNeilBrown goto out; 27030dd395dcSNeilBrown 27041da177e4SLinus Torvalds locks_init_lock(&file_lock); 27051da177e4SLinus Torvalds switch (lock->lk_type) { 27061da177e4SLinus Torvalds case NFS4_READ_LT: 27071da177e4SLinus Torvalds case NFS4_READW_LT: 27081da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2709150b3934SMarc Eshel cmd = F_SETLK; 27101da177e4SLinus Torvalds break; 27111da177e4SLinus Torvalds case NFS4_WRITE_LT: 27121da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27131da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2714150b3934SMarc Eshel cmd = F_SETLK; 27151da177e4SLinus Torvalds break; 27161da177e4SLinus Torvalds default: 27171da177e4SLinus Torvalds status = nfserr_inval; 27181da177e4SLinus Torvalds goto out; 27191da177e4SLinus Torvalds } 2720b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27211da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27221da177e4SLinus Torvalds file_lock.fl_file = filp; 27231da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2724d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27251da177e4SLinus Torvalds 27261da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27271da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27281da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27291da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27301da177e4SLinus Torvalds else 27311da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27321da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27331da177e4SLinus Torvalds 27341da177e4SLinus Torvalds /* 27351da177e4SLinus Torvalds * Try to lock the file in the VFS. 27361da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27371da177e4SLinus Torvalds */ 27381da177e4SLinus Torvalds 2739fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2740b8dd7b9aSAl Viro switch (-err) { 27411da177e4SLinus Torvalds case 0: /* success! */ 27421da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27431da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27441da177e4SLinus Torvalds sizeof(stateid_t)); 2745b8dd7b9aSAl Viro status = 0; 2746eb76b3fdSAndy Adamson break; 2747eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2748eb76b3fdSAndy Adamson status = nfserr_denied; 2749eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2750eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2751eb76b3fdSAndy Adamson break; 27521da177e4SLinus Torvalds case (EDEADLK): 27531da177e4SLinus Torvalds status = nfserr_deadlock; 2754eb76b3fdSAndy Adamson break; 27551da177e4SLinus Torvalds default: 2756fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2757eb76b3fdSAndy Adamson status = nfserr_resource; 2758eb76b3fdSAndy Adamson break; 27591da177e4SLinus Torvalds } 27601da177e4SLinus Torvalds out: 27618a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27628a280510SJ. Bruce Fields release_stateowner(lock_sop); 27633a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27643a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2765a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2766f2327d9aSNeil Brown } 27671da177e4SLinus Torvalds nfs4_unlock_state(); 27681da177e4SLinus Torvalds return status; 27691da177e4SLinus Torvalds } 27701da177e4SLinus Torvalds 27711da177e4SLinus Torvalds /* 27721da177e4SLinus Torvalds * LOCKT operation 27731da177e4SLinus Torvalds */ 2774b37ad28bSAl Viro __be32 2775ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2776ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 27771da177e4SLinus Torvalds { 27781da177e4SLinus Torvalds struct inode *inode; 27791da177e4SLinus Torvalds struct file file; 27801da177e4SLinus Torvalds struct file_lock file_lock; 2781fd85b817SMarc Eshel int error; 2782b37ad28bSAl Viro __be32 status; 27831da177e4SLinus Torvalds 2784af558e33SJ. Bruce Fields if (locks_in_grace()) 27851da177e4SLinus Torvalds return nfserr_grace; 27861da177e4SLinus Torvalds 27871da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 27881da177e4SLinus Torvalds return nfserr_inval; 27891da177e4SLinus Torvalds 27901da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 27911da177e4SLinus Torvalds nfs4_lock_state(); 27921da177e4SLinus Torvalds 27931da177e4SLinus Torvalds status = nfserr_stale_clientid; 2794849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 27951da177e4SLinus Torvalds goto out; 27961da177e4SLinus Torvalds 2797ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2798849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 27991da177e4SLinus Torvalds if (status == nfserr_symlink) 28001da177e4SLinus Torvalds status = nfserr_inval; 28011da177e4SLinus Torvalds goto out; 28021da177e4SLinus Torvalds } 28031da177e4SLinus Torvalds 2804ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28051da177e4SLinus Torvalds locks_init_lock(&file_lock); 28061da177e4SLinus Torvalds switch (lockt->lt_type) { 28071da177e4SLinus Torvalds case NFS4_READ_LT: 28081da177e4SLinus Torvalds case NFS4_READW_LT: 28091da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28101da177e4SLinus Torvalds break; 28111da177e4SLinus Torvalds case NFS4_WRITE_LT: 28121da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28131da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28141da177e4SLinus Torvalds break; 28151da177e4SLinus Torvalds default: 28162fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 28171da177e4SLinus Torvalds status = nfserr_inval; 28181da177e4SLinus Torvalds goto out; 28191da177e4SLinus Torvalds } 28201da177e4SLinus Torvalds 28211da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28221da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28231da177e4SLinus Torvalds if (lockt->lt_stateowner) 28241da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28251da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28261da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2827d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28281da177e4SLinus Torvalds 28291da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28301da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28311da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28321da177e4SLinus Torvalds else 28331da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28341da177e4SLinus Torvalds 28351da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28361da177e4SLinus Torvalds 2837fd85b817SMarc Eshel /* vfs_test_lock uses the struct file _only_ to resolve the inode. 28381da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 2839fd85b817SMarc Eshel * file may not exist, pass vfs_test_lock a struct file with 28401da177e4SLinus Torvalds * only the dentry:inode set. 28411da177e4SLinus Torvalds */ 28421da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 2843ca364317SJ.Bruce Fields file.f_path.dentry = cstate->current_fh.fh_dentry; 28441da177e4SLinus Torvalds 28451da177e4SLinus Torvalds status = nfs_ok; 2846fd85b817SMarc Eshel error = vfs_test_lock(&file, &file_lock); 2847fd85b817SMarc Eshel if (error) { 2848fd85b817SMarc Eshel status = nfserrno(error); 2849fd85b817SMarc Eshel goto out; 2850fd85b817SMarc Eshel } 28519d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 28521da177e4SLinus Torvalds status = nfserr_denied; 28539d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 28541da177e4SLinus Torvalds } 28551da177e4SLinus Torvalds out: 28561da177e4SLinus Torvalds nfs4_unlock_state(); 28571da177e4SLinus Torvalds return status; 28581da177e4SLinus Torvalds } 28591da177e4SLinus Torvalds 2860b37ad28bSAl Viro __be32 2861ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2862a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 28631da177e4SLinus Torvalds { 28641da177e4SLinus Torvalds struct nfs4_stateid *stp; 28651da177e4SLinus Torvalds struct file *filp = NULL; 28661da177e4SLinus Torvalds struct file_lock file_lock; 2867b37ad28bSAl Viro __be32 status; 2868b8dd7b9aSAl Viro int err; 28691da177e4SLinus Torvalds 28701da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28711da177e4SLinus Torvalds (long long) locku->lu_offset, 28721da177e4SLinus Torvalds (long long) locku->lu_length); 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28751da177e4SLinus Torvalds return nfserr_inval; 28761da177e4SLinus Torvalds 28771da177e4SLinus Torvalds nfs4_lock_state(); 28781da177e4SLinus Torvalds 2879ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 28801da177e4SLinus Torvalds locku->lu_seqid, 28811da177e4SLinus Torvalds &locku->lu_stateid, 2882f3362737SJ. Bruce Fields LOCK_STATE, 28831da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 28841da177e4SLinus Torvalds goto out; 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds filp = stp->st_vfs_file; 28871da177e4SLinus Torvalds BUG_ON(!filp); 28881da177e4SLinus Torvalds locks_init_lock(&file_lock); 28891da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 28901da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 28911da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28921da177e4SLinus Torvalds file_lock.fl_file = filp; 28931da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2894d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28951da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 28961da177e4SLinus Torvalds 28971da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 28981da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28991da177e4SLinus Torvalds else 29001da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29011da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29021da177e4SLinus Torvalds 29031da177e4SLinus Torvalds /* 29041da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29051da177e4SLinus Torvalds */ 2906fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2907b8dd7b9aSAl Viro if (err) { 2908fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29091da177e4SLinus Torvalds goto out_nfserr; 29101da177e4SLinus Torvalds } 29111da177e4SLinus Torvalds /* 29121da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29131da177e4SLinus Torvalds */ 29141da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29151da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds out: 2918f2327d9aSNeil Brown if (locku->lu_stateowner) { 29191da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2920a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2921f2327d9aSNeil Brown } 29221da177e4SLinus Torvalds nfs4_unlock_state(); 29231da177e4SLinus Torvalds return status; 29241da177e4SLinus Torvalds 29251da177e4SLinus Torvalds out_nfserr: 2926b8dd7b9aSAl Viro status = nfserrno(err); 29271da177e4SLinus Torvalds goto out; 29281da177e4SLinus Torvalds } 29291da177e4SLinus Torvalds 29301da177e4SLinus Torvalds /* 29311da177e4SLinus Torvalds * returns 29321da177e4SLinus Torvalds * 1: locks held by lockowner 29331da177e4SLinus Torvalds * 0: no locks held by lockowner 29341da177e4SLinus Torvalds */ 29351da177e4SLinus Torvalds static int 29361da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29371da177e4SLinus Torvalds { 29381da177e4SLinus Torvalds struct file_lock **flpp; 29397eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 29401da177e4SLinus Torvalds int status = 0; 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds lock_kernel(); 29431da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2944796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29451da177e4SLinus Torvalds status = 1; 29461da177e4SLinus Torvalds goto out; 29471da177e4SLinus Torvalds } 2948796dadfdSJ. Bruce Fields } 29491da177e4SLinus Torvalds out: 29501da177e4SLinus Torvalds unlock_kernel(); 29511da177e4SLinus Torvalds return status; 29521da177e4SLinus Torvalds } 29531da177e4SLinus Torvalds 2954b37ad28bSAl Viro __be32 2955b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 2956b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2957b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 29581da177e4SLinus Torvalds { 29591da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29603e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29613e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29621da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29633e9e3dbeSNeilBrown struct list_head matches; 29643e9e3dbeSNeilBrown int i; 2965b37ad28bSAl Viro __be32 status; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29681da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29691da177e4SLinus Torvalds 29701da177e4SLinus Torvalds /* XXX check for lease expiration */ 29711da177e4SLinus Torvalds 29721da177e4SLinus Torvalds status = nfserr_stale_clientid; 2973849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29741da177e4SLinus Torvalds return status; 29751da177e4SLinus Torvalds 29761da177e4SLinus Torvalds nfs4_lock_state(); 29771da177e4SLinus Torvalds 29781da177e4SLinus Torvalds status = nfserr_locks_held; 29793e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29803e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29813e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29823e9e3dbeSNeilBrown * data structures. */ 29833e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29843e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 29853e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 2986599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 29873e9e3dbeSNeilBrown continue; 29883e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 2989ea1da636SNeilBrown st_perstateowner) { 29903e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 29911da177e4SLinus Torvalds goto out; 29923e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 29933e9e3dbeSNeilBrown * so it's OK to fool with here. */ 29943e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 29951da177e4SLinus Torvalds } 29963e9e3dbeSNeilBrown } 29973e9e3dbeSNeilBrown } 29983e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 29993e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30003e9e3dbeSNeilBrown * have been checked. */ 30011da177e4SLinus Torvalds status = nfs_ok; 30020fa822e4SNeilBrown while (!list_empty(&matches)) { 30030fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30040fa822e4SNeilBrown so_perclient); 30050fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30060fa822e4SNeilBrown * for openowners. */ 30070fa822e4SNeilBrown list_del(&sop->so_perclient); 30083e9e3dbeSNeilBrown release_stateowner(sop); 30091da177e4SLinus Torvalds } 30101da177e4SLinus Torvalds out: 30111da177e4SLinus Torvalds nfs4_unlock_state(); 30121da177e4SLinus Torvalds return status; 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds 30151da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3016a55370a3SNeilBrown alloc_reclaim(void) 30171da177e4SLinus Torvalds { 3018a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30191da177e4SLinus Torvalds } 30201da177e4SLinus Torvalds 3021c7b9a459SNeilBrown int 3022c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3023c7b9a459SNeilBrown { 3024c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3025c7b9a459SNeilBrown struct nfs4_client *clp; 3026c7b9a459SNeilBrown 3027c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3028c7b9a459SNeilBrown return clp ? 1 : 0; 3029c7b9a459SNeilBrown } 3030c7b9a459SNeilBrown 30311da177e4SLinus Torvalds /* 30321da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30331da177e4SLinus Torvalds */ 3034190e4fbfSNeilBrown int 3035190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30361da177e4SLinus Torvalds { 30371da177e4SLinus Torvalds unsigned int strhashval; 30381da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30391da177e4SLinus Torvalds 3040a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3041a55370a3SNeilBrown crp = alloc_reclaim(); 30421da177e4SLinus Torvalds if (!crp) 30431da177e4SLinus Torvalds return 0; 3044a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30451da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30461da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3047a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30481da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30491da177e4SLinus Torvalds return 1; 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds 30521da177e4SLinus Torvalds static void 30531da177e4SLinus Torvalds nfs4_release_reclaim(void) 30541da177e4SLinus Torvalds { 30551da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30561da177e4SLinus Torvalds int i; 30571da177e4SLinus Torvalds 30581da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30591da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30601da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30611da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30621da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30631da177e4SLinus Torvalds kfree(crp); 30641da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30651da177e4SLinus Torvalds } 30661da177e4SLinus Torvalds } 30671da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30681da177e4SLinus Torvalds } 30691da177e4SLinus Torvalds 30701da177e4SLinus Torvalds /* 30711da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3072fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30731da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30741da177e4SLinus Torvalds { 30751da177e4SLinus Torvalds unsigned int strhashval; 30761da177e4SLinus Torvalds struct nfs4_client *clp; 30771da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30781da177e4SLinus Torvalds 30791da177e4SLinus Torvalds 30801da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30811da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30821da177e4SLinus Torvalds if (clp == NULL) 30831da177e4SLinus Torvalds return NULL; 30841da177e4SLinus Torvalds 3085a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3086a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3087a55370a3SNeilBrown clp->cl_recdir); 30881da177e4SLinus Torvalds 30891da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3090a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 30911da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3092a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 30931da177e4SLinus Torvalds return crp; 30941da177e4SLinus Torvalds } 30951da177e4SLinus Torvalds } 30961da177e4SLinus Torvalds return NULL; 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds /* 31001da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31011da177e4SLinus Torvalds */ 3102b37ad28bSAl Viro __be32 31031da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31041da177e4SLinus Torvalds { 3105dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31061da177e4SLinus Torvalds } 31071da177e4SLinus Torvalds 3108ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31091da177e4SLinus Torvalds 3110e8ff2a84SJ. Bruce Fields int 3111ac4d8ff2SNeilBrown nfs4_state_init(void) 31121da177e4SLinus Torvalds { 3113e8ff2a84SJ. Bruce Fields int i, status; 31141da177e4SLinus Torvalds 3115e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3116e8ff2a84SJ. Bruce Fields if (status) 3117e8ff2a84SJ. Bruce Fields return status; 31181da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31191da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31201da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31211da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31221da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31231da177e4SLinus Torvalds } 31241da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31251da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31261da177e4SLinus Torvalds } 31271da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31281da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31291da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31301da177e4SLinus Torvalds } 31311da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31321da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31331da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31361da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31401da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31411da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31421da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3143ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3144ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3145ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3146e8ff2a84SJ. Bruce Fields return 0; 3147ac4d8ff2SNeilBrown } 3148ac4d8ff2SNeilBrown 3149190e4fbfSNeilBrown static void 3150190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3151190e4fbfSNeilBrown { 3152190e4fbfSNeilBrown int status; 3153190e4fbfSNeilBrown 31540964a3d3SNeilBrown nfs4_lock_state(); 31550964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3156190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31570964a3d3SNeilBrown nfs4_unlock_state(); 3158190e4fbfSNeilBrown if (status) 3159190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3160190e4fbfSNeilBrown } 3161190e4fbfSNeilBrown 31629a8db97eSMarc Eshel unsigned long 31639a8db97eSMarc Eshel get_nfs4_grace_period(void) 31649a8db97eSMarc Eshel { 31659a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 31669a8db97eSMarc Eshel } 31679a8db97eSMarc Eshel 3168c2f1a551SMeelap Shah /* 3169c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3170c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3171c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3172c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3173c2f1a551SMeelap Shah * 3174c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3175c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3176c2f1a551SMeelap Shah */ 3177c2f1a551SMeelap Shah static void 3178c2f1a551SMeelap Shah set_max_delegations(void) 3179c2f1a551SMeelap Shah { 3180c2f1a551SMeelap Shah /* 3181c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3182c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3183c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3184c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3185c2f1a551SMeelap Shah */ 3186c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3187c2f1a551SMeelap Shah } 3188c2f1a551SMeelap Shah 3189ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3190ac4d8ff2SNeilBrown 3191ac4d8ff2SNeilBrown static void 3192ac4d8ff2SNeilBrown __nfs4_state_start(void) 3193ac4d8ff2SNeilBrown { 31949a8db97eSMarc Eshel unsigned long grace_time; 3195ac4d8ff2SNeilBrown 31961da177e4SLinus Torvalds boot_time = get_seconds(); 3197af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3198d99a05adSNeilBrown lease_time = user_lease_time; 3199af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 32009a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32019a8db97eSMarc Eshel grace_time/HZ); 320258da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32039a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3204c2f1a551SMeelap Shah set_max_delegations(); 32051da177e4SLinus Torvalds } 32061da177e4SLinus Torvalds 3207e8ff2a84SJ. Bruce Fields void 320876a3550eSNeilBrown nfs4_state_start(void) 32091da177e4SLinus Torvalds { 32101da177e4SLinus Torvalds if (nfs4_init) 3211e8ff2a84SJ. Bruce Fields return; 3212190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 321376a3550eSNeilBrown __nfs4_state_start(); 32141da177e4SLinus Torvalds nfs4_init = 1; 3215e8ff2a84SJ. Bruce Fields return; 32161da177e4SLinus Torvalds } 32171da177e4SLinus Torvalds 32181da177e4SLinus Torvalds time_t 32191da177e4SLinus Torvalds nfs4_lease_time(void) 32201da177e4SLinus Torvalds { 32211da177e4SLinus Torvalds return lease_time; 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds 32241da177e4SLinus Torvalds static void 32251da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32261da177e4SLinus Torvalds { 32271da177e4SLinus Torvalds int i; 32281da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32291da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32301da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32311da177e4SLinus Torvalds 32321da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32331da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32341da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32351da177e4SLinus Torvalds expire_client(clp); 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32381da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32391da177e4SLinus Torvalds expire_client(clp); 32401da177e4SLinus Torvalds } 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32431da177e4SLinus Torvalds spin_lock(&recall_lock); 32441da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32451da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32461da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32471da177e4SLinus Torvalds } 32481da177e4SLinus Torvalds spin_unlock(&recall_lock); 32491da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32501da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32511da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32521da177e4SLinus Torvalds unhash_delegation(dp); 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds 3255190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32561da177e4SLinus Torvalds nfs4_init = 0; 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds void 32601da177e4SLinus Torvalds nfs4_state_shutdown(void) 32611da177e4SLinus Torvalds { 32625e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 32635e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 32641da177e4SLinus Torvalds nfs4_lock_state(); 32651da177e4SLinus Torvalds nfs4_release_reclaim(); 32661da177e4SLinus Torvalds __nfs4_state_shutdown(); 32671da177e4SLinus Torvalds nfs4_unlock_state(); 32681da177e4SLinus Torvalds } 32691da177e4SLinus Torvalds 32703dd98a3bSJeff Layton /* 32713dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 32723dd98a3bSJeff Layton * accessed when nfsd is starting. 32733dd98a3bSJeff Layton */ 32740964a3d3SNeilBrown static void 32750964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32760964a3d3SNeilBrown { 32770964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32780964a3d3SNeilBrown } 32790964a3d3SNeilBrown 32800964a3d3SNeilBrown /* 32810964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32820964a3d3SNeilBrown */ 32830964a3d3SNeilBrown int 32840964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32850964a3d3SNeilBrown { 32860964a3d3SNeilBrown int status; 3287a63bb996SAl Viro struct path path; 32880964a3d3SNeilBrown 3289a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 32900964a3d3SNeilBrown if (status) 32910964a3d3SNeilBrown return status; 32920964a3d3SNeilBrown status = -ENOTDIR; 3293a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 32940964a3d3SNeilBrown nfs4_set_recdir(recdir); 32950964a3d3SNeilBrown status = 0; 32960964a3d3SNeilBrown } 3297a63bb996SAl Viro path_put(&path); 32980964a3d3SNeilBrown return status; 32990964a3d3SNeilBrown } 33000964a3d3SNeilBrown 33013dd98a3bSJeff Layton char * 33023dd98a3bSJeff Layton nfs4_recoverydir(void) 33033dd98a3bSJeff Layton { 33043dd98a3bSJeff Layton return user_recovery_dirname; 33053dd98a3bSJeff Layton } 33063dd98a3bSJeff Layton 33071da177e4SLinus Torvalds /* 33081da177e4SLinus Torvalds * Called when leasetime is changed. 33091da177e4SLinus Torvalds * 3310d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3311d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3312d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3313d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3314d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33153dd98a3bSJeff Layton * 33163dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 33173dd98a3bSJeff Layton * when nfsd is starting 33181da177e4SLinus Torvalds */ 33191da177e4SLinus Torvalds void 33201da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33211da177e4SLinus Torvalds { 3322d99a05adSNeilBrown user_lease_time = leasetime; 33231da177e4SLinus Torvalds } 3324