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> 441da177e4SLinus Torvalds #include <linux/mount.h> 451da177e4SLinus Torvalds #include <linux/workqueue.h> 461da177e4SLinus Torvalds #include <linux/smp_lock.h> 471da177e4SLinus Torvalds #include <linux/kthread.h> 481da177e4SLinus Torvalds #include <linux/nfs4.h> 491da177e4SLinus Torvalds #include <linux/nfsd/state.h> 501da177e4SLinus Torvalds #include <linux/nfsd/xdr4.h> 510964a3d3SNeilBrown #include <linux/namei.h> 52c2f1a551SMeelap Shah #include <linux/swap.h> 53353ab6e9SIngo Molnar #include <linux/mutex.h> 54fd85b817SMarc Eshel #include <linux/lockd/bind.h> 559a8db97eSMarc Eshel #include <linux/module.h> 561da177e4SLinus Torvalds 571da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds /* Globals */ 601da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 61d99a05adSNeilBrown static time_t user_lease_time = 90; 62fd39ca9aSNeilBrown static time_t boot_time; 63a76b4319SNeilBrown static int in_grace = 1; 641da177e4SLinus Torvalds static u32 current_clientid = 1; 651da177e4SLinus Torvalds static u32 current_ownerid = 1; 661da177e4SLinus Torvalds static u32 current_fileid = 1; 671da177e4SLinus Torvalds static u32 current_delegid = 1; 681da177e4SLinus Torvalds static u32 nfs4_init; 69fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 70fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 71fd39ca9aSNeilBrown 72fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 73fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 771da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 781da177e4SLinus Torvalds static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 790964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 800964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds /* Locking: 831da177e4SLinus Torvalds * 84353ab6e9SIngo Molnar * client_mutex: 851da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 861da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 871da177e4SLinus Torvalds */ 88353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 891da177e4SLinus Torvalds 90e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 93e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 94e60d4398SNeilBrown 951da177e4SLinus Torvalds void 961da177e4SLinus Torvalds nfs4_lock_state(void) 971da177e4SLinus Torvalds { 98353ab6e9SIngo Molnar mutex_lock(&client_mutex); 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds void 1021da177e4SLinus Torvalds nfs4_unlock_state(void) 1031da177e4SLinus Torvalds { 104353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static inline u32 1081da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds u32 x = 0; 1131da177e4SLinus Torvalds while (nbytes--) { 1141da177e4SLinus Torvalds x *= 37; 1151da177e4SLinus Torvalds x += *cptr++; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds return x; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* forward declarations */ 1211da177e4SLinus Torvalds static void release_stateowner(struct nfs4_stateowner *sop); 1221da177e4SLinus Torvalds static void release_stateid(struct nfs4_stateid *stp, int flags); 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds /* 1251da177e4SLinus Torvalds * Delegation state 1261da177e4SLinus Torvalds */ 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 12934af946aSIngo Molnar static DEFINE_SPINLOCK(recall_lock); 1301da177e4SLinus Torvalds static struct list_head del_recall_lru; 1311da177e4SLinus Torvalds 13213cd2184SNeilBrown static void 13313cd2184SNeilBrown free_nfs4_file(struct kref *kref) 13413cd2184SNeilBrown { 13513cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13613cd2184SNeilBrown list_del(&fp->fi_hash); 13713cd2184SNeilBrown iput(fp->fi_inode); 13813cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13913cd2184SNeilBrown } 14013cd2184SNeilBrown 14113cd2184SNeilBrown static inline void 14213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14313cd2184SNeilBrown { 14413cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14513cd2184SNeilBrown } 14613cd2184SNeilBrown 14713cd2184SNeilBrown static inline void 14813cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14913cd2184SNeilBrown { 15013cd2184SNeilBrown kref_get(&fi->fi_ref); 15113cd2184SNeilBrown } 15213cd2184SNeilBrown 153ef0f3390SNeilBrown static int num_delegations; 154c2f1a551SMeelap Shah unsigned int max_delegations; 155ef0f3390SNeilBrown 156ef0f3390SNeilBrown /* 157ef0f3390SNeilBrown * Open owner state (share locks) 158ef0f3390SNeilBrown */ 159ef0f3390SNeilBrown 160ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 161ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 162ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 163ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 164ef0f3390SNeilBrown 165ef0f3390SNeilBrown #define ownerid_hashval(id) \ 166ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 167ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 168ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 169ef0f3390SNeilBrown 170ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 171ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 172ef0f3390SNeilBrown 173ef0f3390SNeilBrown /* hash table for nfs4_file */ 174ef0f3390SNeilBrown #define FILE_HASH_BITS 8 175ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 176ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 177ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 178ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 179ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 180ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 181ef0f3390SNeilBrown 182ef0f3390SNeilBrown #define file_hashval(x) \ 183ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 184ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 185ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 186ef0f3390SNeilBrown 187ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 188ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 189ef0f3390SNeilBrown 1901da177e4SLinus Torvalds static struct nfs4_delegation * 1911da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds struct nfs4_delegation *dp; 1941da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1951da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 19847f9940cSMeelap Shah if (fp->fi_had_conflict) 19947f9940cSMeelap Shah return NULL; 200c2f1a551SMeelap Shah if (num_delegations > max_delegations) 201ef0f3390SNeilBrown return NULL; 2025b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2035b2d21c1SNeilBrown if (dp == NULL) 2041da177e4SLinus Torvalds return dp; 205ef0f3390SNeilBrown num_delegations++; 206ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 207ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2081da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2091da177e4SLinus Torvalds dp->dl_client = clp; 21013cd2184SNeilBrown get_nfs4_file(fp); 2111da177e4SLinus Torvalds dp->dl_file = fp; 2121da177e4SLinus Torvalds dp->dl_flock = NULL; 2131da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2141da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2151da177e4SLinus Torvalds dp->dl_type = type; 2161da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2171da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2181da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2191da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2201da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2211da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2221da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2231da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 2241da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 2251da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 2261da177e4SLinus Torvalds dp->dl_time = 0; 2271da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 228ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 229ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2301da177e4SLinus Torvalds return dp; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds void 2341da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2371da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 23813cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2395b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 240ef0f3390SNeilBrown num_delegations--; 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2451da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2461da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2471da177e4SLinus Torvalds * fl_release_callback. 2481da177e4SLinus Torvalds */ 2491da177e4SLinus Torvalds static void 2501da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2551da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2561da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2571da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 258c907132dSNeilBrown if (dp->dl_flock) 259a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2601da177e4SLinus Torvalds nfsd_close(filp); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* Called under the state lock. */ 2641da177e4SLinus Torvalds static void 2651da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2661da177e4SLinus Torvalds { 267ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 268ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2691da177e4SLinus Torvalds spin_lock(&recall_lock); 2701da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2711da177e4SLinus Torvalds spin_unlock(&recall_lock); 2721da177e4SLinus Torvalds nfs4_close_delegation(dp); 2731da177e4SLinus Torvalds nfs4_put_delegation(dp); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * SETCLIENTID state 2781da177e4SLinus Torvalds */ 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2811da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2821da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2831da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds #define clientid_hashval(id) \ 2861da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 287a55370a3SNeilBrown #define clientstr_hashval(name) \ 288a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2891da177e4SLinus Torvalds /* 2901da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2911da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2921da177e4SLinus Torvalds * 2931da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2941da177e4SLinus Torvalds * setclientid_confirmed info. 2951da177e4SLinus Torvalds * 2961da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2971da177e4SLinus Torvalds * setclientid info. 2981da177e4SLinus Torvalds * 2991da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3001da177e4SLinus Torvalds * for lease renewal. 3011da177e4SLinus Torvalds * 3021da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3031da177e4SLinus Torvalds * for last close replay. 3041da177e4SLinus Torvalds */ 3051da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3061da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3071da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3081da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3091da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3101da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3111da177e4SLinus Torvalds static struct list_head client_lru; 3121da177e4SLinus Torvalds static struct list_head close_lru; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static inline void 3151da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds /* 3181da177e4SLinus Torvalds * Move client to the end to the LRU list. 3191da177e4SLinus Torvalds */ 3201da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 3211da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 3221da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3231da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 3241da177e4SLinus Torvalds clp->cl_time = get_seconds(); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 3281da177e4SLinus Torvalds static int 3291da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 3321da177e4SLinus Torvalds return 0; 3331da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 3341da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 3351da177e4SLinus Torvalds return 1; 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds /* 3391da177e4SLinus Torvalds * XXX Should we use a slab cache ? 3401da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 3411da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 3421da177e4SLinus Torvalds */ 3431da177e4SLinus Torvalds static inline struct nfs4_client * 3441da177e4SLinus Torvalds alloc_client(struct xdr_netobj name) 3451da177e4SLinus Torvalds { 3461da177e4SLinus Torvalds struct nfs4_client *clp; 3471da177e4SLinus Torvalds 348f8314dc6SPanagiotis Issaris if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 3491da177e4SLinus Torvalds if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 3501da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3511da177e4SLinus Torvalds clp->cl_name.len = name.len; 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds else { 3541da177e4SLinus Torvalds kfree(clp); 3551da177e4SLinus Torvalds clp = NULL; 3561da177e4SLinus Torvalds } 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds return clp; 3591da177e4SLinus Torvalds } 3601da177e4SLinus Torvalds 3611b1a9b31SJ. Bruce Fields static void 3621b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 3631b1a9b31SJ. Bruce Fields { 3641b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3651b1a9b31SJ. Bruce Fields 3661b1a9b31SJ. Bruce Fields /* shutdown rpc client, ending any outstanding recall rpcs */ 3671b1a9b31SJ. Bruce Fields if (clnt) { 3681b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 3691b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 3701b1a9b31SJ. Bruce Fields } 3711b1a9b31SJ. Bruce Fields } 3721b1a9b31SJ. Bruce Fields 3731da177e4SLinus Torvalds static inline void 3741da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3751da177e4SLinus Torvalds { 3761b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 3771da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3781da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3791da177e4SLinus Torvalds kfree(clp->cl_name.data); 3801da177e4SLinus Torvalds kfree(clp); 3811da177e4SLinus Torvalds } 3821da177e4SLinus Torvalds 3831da177e4SLinus Torvalds void 3841da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3851da177e4SLinus Torvalds { 3861da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3871da177e4SLinus Torvalds free_client(clp); 3881da177e4SLinus Torvalds } 3891da177e4SLinus Torvalds 3901da177e4SLinus Torvalds static void 3911da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3921da177e4SLinus Torvalds { 3931da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3941da177e4SLinus Torvalds struct nfs4_delegation *dp; 3951da177e4SLinus Torvalds struct list_head reaplist; 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3981da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4011da177e4SLinus Torvalds spin_lock(&recall_lock); 402ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 403ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4041da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4051da177e4SLinus Torvalds dp->dl_flock); 406ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4071da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4081da177e4SLinus Torvalds } 4091da177e4SLinus Torvalds spin_unlock(&recall_lock); 4101da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4111da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4121da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4131da177e4SLinus Torvalds unhash_delegation(dp); 4141da177e4SLinus Torvalds } 4151da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4161da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4171da177e4SLinus Torvalds list_del(&clp->cl_lru); 418ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 419ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4201da177e4SLinus Torvalds release_stateowner(sop); 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds put_nfs4_client(clp); 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds static struct nfs4_client * 426a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 4271da177e4SLinus Torvalds struct nfs4_client *clp; 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 4301da177e4SLinus Torvalds goto out; 431a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4321da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4331da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4341da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4351da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 436ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 437ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4381da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4391da177e4SLinus Torvalds out: 4401da177e4SLinus Torvalds return clp; 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds static void 4441da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 4451da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 4461da177e4SLinus Torvalds } 4471da177e4SLinus Torvalds 4481da177e4SLinus Torvalds static void 4491da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4501da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4511da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4521da177e4SLinus Torvalds } 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds static void 4551da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4561da177e4SLinus Torvalds 4571da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4581da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4591da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4601da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4611da177e4SLinus Torvalds } 4621da177e4SLinus Torvalds 463a55370a3SNeilBrown static inline int 464599e0a22SJ. Bruce Fields 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 4881da177e4SLinus Torvalds static void 4891da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4901da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4911da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4921da177e4SLinus Torvalds } 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds static void 4951da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4961da177e4SLinus Torvalds struct timespec tv; 4971da177e4SLinus Torvalds u32 * p; 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds tv = CURRENT_TIME; 5001da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 5011da177e4SLinus Torvalds *p++ = tv.tv_sec; 5021da177e4SLinus Torvalds *p++ = tv.tv_nsec; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds static int 5061da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 5071da177e4SLinus Torvalds 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 6861da177e4SLinus Torvalds /* 6871da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6881da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6891da177e4SLinus Torvalds * CASE0 - CASE4 below. 6901da177e4SLinus Torvalds * 6911da177e4SLinus Torvalds * NOTES: 6921da177e4SLinus Torvalds * callback information will be processed in a future patch 6931da177e4SLinus Torvalds * 6941da177e4SLinus Torvalds * an unconfirmed record is added when: 6951da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6961da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6971da177e4SLinus Torvalds * verifier, and clientid. 6981da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6991da177e4SLinus Torvalds * and there is no unconfirmed record with matching 7001da177e4SLinus Torvalds * name and principal 7011da177e4SLinus Torvalds * 7021da177e4SLinus Torvalds * an unconfirmed record is replaced when: 7031da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 7041da177e4SLinus Torvalds * and an unconfirmed record is found with matching 7051da177e4SLinus Torvalds * name, principal, and with clientid and 7061da177e4SLinus Torvalds * confirm that does not match the confirmed record. 7071da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 7081da177e4SLinus Torvalds * principal. there is an unconfirmed record with 7091da177e4SLinus Torvalds * matching name, principal. 7101da177e4SLinus Torvalds * 7111da177e4SLinus Torvalds * an unconfirmed record is deleted when: 7121da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 7131da177e4SLinus Torvalds * and confirmed clientid. 7141da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 7151da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 7161da177e4SLinus Torvalds * as described above. 7171da177e4SLinus Torvalds * 7181da177e4SLinus Torvalds */ 719b37ad28bSAl Viro __be32 720b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 721b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 7221da177e4SLinus Torvalds { 72327459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 7241da177e4SLinus Torvalds struct xdr_netobj clname = { 7251da177e4SLinus Torvalds .len = setclid->se_namelen, 7261da177e4SLinus Torvalds .data = setclid->se_name, 7271da177e4SLinus Torvalds }; 7281da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7291da177e4SLinus Torvalds unsigned int strhashval; 73028ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 731b37ad28bSAl Viro __be32 status; 732a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7331da177e4SLinus Torvalds 7341da177e4SLinus Torvalds if (!check_name(clname)) 73573aea4ecSNeil Brown return nfserr_inval; 7361da177e4SLinus Torvalds 737a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 738a55370a3SNeilBrown if (status) 73973aea4ecSNeil Brown return status; 740a55370a3SNeilBrown 7411da177e4SLinus Torvalds /* 7421da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7431da177e4SLinus Torvalds * We get here on a DRC miss. 7441da177e4SLinus Torvalds */ 7451da177e4SLinus Torvalds 746a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7471da177e4SLinus Torvalds 7481da177e4SLinus Torvalds nfs4_lock_state(); 74928ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 75028ce6054SNeilBrown if (conf) { 7511da177e4SLinus Torvalds /* 7521da177e4SLinus Torvalds * CASE 0: 7531da177e4SLinus Torvalds * clname match, confirmed, different principal 7541da177e4SLinus Torvalds * or different ip_address 7551da177e4SLinus Torvalds */ 7561da177e4SLinus Torvalds status = nfserr_clid_inuse; 757599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) 75827459f09SChuck Lever || conf->cl_addr != sin->sin_addr.s_addr) { 75921315eddSBruce Fields dprintk("NFSD: setclientid: string in use by client" 76021315eddSBruce Fields "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); 7611da177e4SLinus Torvalds goto out; 7621da177e4SLinus Torvalds } 7631da177e4SLinus Torvalds } 76428ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7651da177e4SLinus Torvalds status = nfserr_resource; 7661da177e4SLinus Torvalds if (!conf) { 7671da177e4SLinus Torvalds /* 7681da177e4SLinus Torvalds * CASE 4: 7691da177e4SLinus Torvalds * placed first, because it is the normal case. 7701da177e4SLinus Torvalds */ 7711da177e4SLinus Torvalds if (unconf) 7721da177e4SLinus Torvalds expire_client(unconf); 773a55370a3SNeilBrown new = create_client(clname, dname); 774a55370a3SNeilBrown if (new == NULL) 7751da177e4SLinus Torvalds goto out; 7761da177e4SLinus Torvalds gen_clid(new); 777599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 7781da177e4SLinus Torvalds /* 7791da177e4SLinus Torvalds * CASE 1: 7801da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7811da177e4SLinus Torvalds * verifier match: probable callback update 7821da177e4SLinus Torvalds * 7831da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7841da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7851da177e4SLinus Torvalds * 7861da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7871da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7881da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7891da177e4SLinus Torvalds * new cl_confirm 7901da177e4SLinus Torvalds */ 79131f4a6c1SNeilBrown if (unconf) { 79231f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 79331f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 79431f4a6c1SNeilBrown * This has the advantage that there is at most 79531f4a6c1SNeilBrown * one {*x***} in either list at any time. 79631f4a6c1SNeilBrown */ 7971da177e4SLinus Torvalds expire_client(unconf); 7981da177e4SLinus Torvalds } 799a55370a3SNeilBrown new = create_client(clname, dname); 800a55370a3SNeilBrown if (new == NULL) 8011da177e4SLinus Torvalds goto out; 8021da177e4SLinus Torvalds copy_clid(new, conf); 8031da177e4SLinus Torvalds } else if (!unconf) { 8041da177e4SLinus Torvalds /* 8051da177e4SLinus Torvalds * CASE 2: 8061da177e4SLinus Torvalds * clname match, confirmed, principal match 8071da177e4SLinus Torvalds * verfier does not match 8081da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 8091da177e4SLinus Torvalds * using input clverifier, clname, and callback info 8101da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 8111da177e4SLinus Torvalds */ 812a55370a3SNeilBrown new = create_client(clname, dname); 813a55370a3SNeilBrown if (new == NULL) 8141da177e4SLinus Torvalds goto out; 8151da177e4SLinus Torvalds gen_clid(new); 816599e0a22SJ. Bruce Fields } else if (!same_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 8171da177e4SLinus Torvalds /* 8181da177e4SLinus Torvalds * CASE3: 8191da177e4SLinus Torvalds * confirmed found (name, principal match) 8201da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 8211da177e4SLinus Torvalds * 8221da177e4SLinus Torvalds * unconfirmed found (name match) 8231da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 8241da177e4SLinus Torvalds * 8251da177e4SLinus Torvalds * remove unconfirmed. 8261da177e4SLinus Torvalds * 8271da177e4SLinus Torvalds * create an unconfirmed nfs4_client 8281da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 8291da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 8301da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 8311da177e4SLinus Torvalds */ 8321da177e4SLinus Torvalds expire_client(unconf); 833a55370a3SNeilBrown new = create_client(clname, dname); 834a55370a3SNeilBrown if (new == NULL) 8351da177e4SLinus Torvalds goto out; 8361da177e4SLinus Torvalds gen_clid(new); 8371da177e4SLinus Torvalds } else { 8381da177e4SLinus Torvalds /* No cases hit !!! */ 8391da177e4SLinus Torvalds status = nfserr_inval; 8401da177e4SLinus Torvalds goto out; 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds } 843c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 844c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 845c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 846c175b83cSJ. Bruce Fields gen_confirm(new); 847c175b83cSJ. Bruce Fields gen_callback(new, setclid); 848c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 8491da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8501da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8511da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8521da177e4SLinus Torvalds status = nfs_ok; 8531da177e4SLinus Torvalds out: 8541da177e4SLinus Torvalds nfs4_unlock_state(); 8551da177e4SLinus Torvalds return status; 8561da177e4SLinus Torvalds } 8571da177e4SLinus Torvalds 8581da177e4SLinus Torvalds 8591da177e4SLinus Torvalds /* 8601da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8611da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8621da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8631da177e4SLinus Torvalds * 8641da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8651da177e4SLinus Torvalds */ 866b37ad28bSAl Viro __be32 867b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 868b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 869b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 8701da177e4SLinus Torvalds { 87127459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 87221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8731da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8741da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 875b37ad28bSAl Viro __be32 status; 8761da177e4SLinus Torvalds 8771da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8781da177e4SLinus Torvalds return nfserr_stale_clientid; 8791da177e4SLinus Torvalds /* 8801da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8811da177e4SLinus Torvalds * We get here on a DRC miss. 8821da177e4SLinus Torvalds */ 8831da177e4SLinus Torvalds 8841da177e4SLinus Torvalds nfs4_lock_state(); 88521ab45a4SNeilBrown 88621ab45a4SNeilBrown conf = find_confirmed_client(clid); 88721ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 88821ab45a4SNeilBrown 88922de4d83SNeilBrown status = nfserr_clid_inuse; 89027459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 8911da177e4SLinus Torvalds goto out; 89227459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 8931da177e4SLinus Torvalds goto out; 89421ab45a4SNeilBrown 8951da177e4SLinus Torvalds if ((conf && unconf) && 896599e0a22SJ. Bruce Fields (same_verf(&unconf->cl_confirm, &confirm)) && 897599e0a22SJ. Bruce Fields (same_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 898a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 899599e0a22SJ. Bruce Fields (!same_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 9007c79f737SNeilBrown /* CASE 1: 9017c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 9027c79f737SNeilBrown * conf record that matches input clientid. 9037c79f737SNeilBrown * conf and unconf records match names, verifiers 9047c79f737SNeilBrown */ 905599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 9061da177e4SLinus Torvalds status = nfserr_clid_inuse; 9071da177e4SLinus Torvalds else { 9081a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9091a69c179SNeilBrown * change request correctly. */ 910cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 91121ab45a4SNeilBrown gen_confirm(conf); 91246309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9131a69c179SNeilBrown expire_client(unconf); 9141da177e4SLinus Torvalds status = nfs_ok; 9151a69c179SNeilBrown 9161da177e4SLinus Torvalds } 9177c79f737SNeilBrown } else if ((conf && !unconf) || 9181da177e4SLinus Torvalds ((conf && unconf) && 919599e0a22SJ. Bruce Fields (!same_verf(&conf->cl_verifier, &unconf->cl_verifier) || 920a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 9217c79f737SNeilBrown /* CASE 2: 9227c79f737SNeilBrown * conf record that matches input clientid. 9237c79f737SNeilBrown * if unconf record matches input clientid, then 9247c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 9257c79f737SNeilBrown * conf record. 9267c79f737SNeilBrown */ 927599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 9281da177e4SLinus Torvalds status = nfserr_clid_inuse; 92921ab45a4SNeilBrown else 9301da177e4SLinus Torvalds status = nfs_ok; 9317c79f737SNeilBrown } else if (!conf && unconf 932599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 9331da177e4SLinus Torvalds /* CASE 3: 9341da177e4SLinus Torvalds * conf record not found. 9351da177e4SLinus Torvalds * unconf record found. 9361da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9371da177e4SLinus Torvalds */ 938599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9391da177e4SLinus Torvalds status = nfserr_clid_inuse; 9401da177e4SLinus Torvalds } else { 9411a69c179SNeilBrown unsigned int hash = 9421a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9431a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9441a69c179SNeilBrown hash); 9451a69c179SNeilBrown if (conf) { 946c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9471a69c179SNeilBrown expire_client(conf); 9481a69c179SNeilBrown } 9491da177e4SLinus Torvalds move_to_confirmed(unconf); 95021ab45a4SNeilBrown conf = unconf; 95146f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 9521a69c179SNeilBrown status = nfs_ok; 9531da177e4SLinus Torvalds } 954599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 955599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 9567c79f737SNeilBrown &confirm)))) { 9571da177e4SLinus Torvalds /* CASE 4: 9587c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9591da177e4SLinus Torvalds * match input confirm. 9607c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9611da177e4SLinus Torvalds * does not match input confirm. 9621da177e4SLinus Torvalds */ 9631da177e4SLinus Torvalds status = nfserr_stale_clientid; 9647c79f737SNeilBrown } else { 9651da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 96622de4d83SNeilBrown status = nfserr_clid_inuse; 96708e8987cSNeilBrown } 9681da177e4SLinus Torvalds out: 9691da177e4SLinus Torvalds nfs4_unlock_state(); 9701da177e4SLinus Torvalds return status; 9711da177e4SLinus Torvalds } 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9741da177e4SLinus Torvalds static inline struct nfs4_file * 9751da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9761da177e4SLinus Torvalds { 9771da177e4SLinus Torvalds struct nfs4_file *fp; 9781da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9791da177e4SLinus Torvalds 980e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 981e60d4398SNeilBrown if (fp) { 98213cd2184SNeilBrown kref_init(&fp->fi_ref); 9831da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9848beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9861da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9871da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9881da177e4SLinus Torvalds fp->fi_id = current_fileid++; 98947f9940cSMeelap Shah fp->fi_had_conflict = false; 9901da177e4SLinus Torvalds return fp; 9911da177e4SLinus Torvalds } 9921da177e4SLinus Torvalds return NULL; 9931da177e4SLinus Torvalds } 9941da177e4SLinus Torvalds 9951da177e4SLinus Torvalds static void 996e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 997e60d4398SNeilBrown { 998e60d4398SNeilBrown if (*slab == NULL) 999e60d4398SNeilBrown return; 10001a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1001e60d4398SNeilBrown *slab = NULL; 1002e60d4398SNeilBrown } 1003e60d4398SNeilBrown 1004e8ff2a84SJ. Bruce Fields void 1005e60d4398SNeilBrown nfsd4_free_slabs(void) 1006e60d4398SNeilBrown { 1007e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1008e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10095ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10105b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1011e60d4398SNeilBrown } 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds static int 10141da177e4SLinus Torvalds nfsd4_init_slabs(void) 10151da177e4SLinus Torvalds { 10161da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 101720c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1018e60d4398SNeilBrown if (stateowner_slab == NULL) 1019e60d4398SNeilBrown goto out_nomem; 1020e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 102120c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1022e60d4398SNeilBrown if (file_slab == NULL) 1023e60d4398SNeilBrown goto out_nomem; 10245ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 102520c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 10265ac049acSNeilBrown if (stateid_slab == NULL) 10275ac049acSNeilBrown goto out_nomem; 10285b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 102920c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 10305b2d21c1SNeilBrown if (deleg_slab == NULL) 10315b2d21c1SNeilBrown goto out_nomem; 1032e60d4398SNeilBrown return 0; 1033e60d4398SNeilBrown out_nomem: 1034e60d4398SNeilBrown nfsd4_free_slabs(); 10351da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10361da177e4SLinus Torvalds return -ENOMEM; 10371da177e4SLinus Torvalds } 10381da177e4SLinus Torvalds 10391da177e4SLinus Torvalds void 10401da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10411da177e4SLinus Torvalds { 10421da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10431da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10441da177e4SLinus Torvalds kfree(sop->so_owner.data); 10451da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10491da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10541da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10551da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10561da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10571da177e4SLinus Torvalds kref_init(&sop->so_ref); 10581da177e4SLinus Torvalds return sop; 10591da177e4SLinus Torvalds } 10601da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds return NULL; 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds 10651da177e4SLinus Torvalds static struct nfs4_stateowner * 10661da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10671da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10681da177e4SLinus Torvalds struct nfs4_replay *rp; 10691da177e4SLinus Torvalds unsigned int idhashval; 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10721da177e4SLinus Torvalds return NULL; 10731da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10741da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10751da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10761da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1077ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1078ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10791da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10801da177e4SLinus Torvalds sop->so_time = 0; 10811da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10821da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1083ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10841da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10851da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10861da177e4SLinus Torvalds sop->so_client = clp; 10871da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10881da177e4SLinus Torvalds sop->so_confirmed = 0; 10891da177e4SLinus Torvalds rp = &sop->so_replay; 1090de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 10911da177e4SLinus Torvalds rp->rp_buflen = 0; 10921da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 10931da177e4SLinus Torvalds return sop; 10941da177e4SLinus Torvalds } 10951da177e4SLinus Torvalds 10961da177e4SLinus Torvalds static void 10971da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 10981da177e4SLinus Torvalds { 10991da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11001da177e4SLinus Torvalds 1101ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1102ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1103ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1104ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11051da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11061da177e4SLinus Torvalds release_stateowner(lock_sop); 11071da177e4SLinus Torvalds } 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds static void 11111da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11121da177e4SLinus Torvalds { 11131da177e4SLinus Torvalds struct nfs4_stateid *stp; 11141da177e4SLinus Torvalds 11151da177e4SLinus Torvalds list_del(&sop->so_idhash); 11161da177e4SLinus Torvalds list_del(&sop->so_strhash); 11176fa305deSNeilBrown if (sop->so_is_open_owner) 11181da177e4SLinus Torvalds list_del(&sop->so_perclient); 1119ea1da636SNeilBrown list_del(&sop->so_perstateid); 1120ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1121ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1122ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11231da177e4SLinus Torvalds if (sop->so_is_open_owner) 11241da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11251da177e4SLinus Torvalds else 11261da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11271da177e4SLinus Torvalds } 11281da177e4SLinus Torvalds } 11291da177e4SLinus Torvalds 11301da177e4SLinus Torvalds static void 11311da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11321da177e4SLinus Torvalds { 11331da177e4SLinus Torvalds unhash_stateowner(sop); 11341da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11351da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds 11381da177e4SLinus Torvalds static inline void 11391da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11401da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11411da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11421da177e4SLinus Torvalds 11431da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1144ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1145ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11461da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11471da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1148ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11498beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11501da177e4SLinus Torvalds stp->st_stateowner = sop; 115113cd2184SNeilBrown get_nfs4_file(fp); 11521da177e4SLinus Torvalds stp->st_file = fp; 11531da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11541da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11551da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11561da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11571da177e4SLinus Torvalds stp->st_access_bmap = 0; 11581da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11591da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11601da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11614c4cd222SNeilBrown stp->st_openstp = NULL; 11621da177e4SLinus Torvalds } 11631da177e4SLinus Torvalds 11641da177e4SLinus Torvalds static void 11651da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11661da177e4SLinus Torvalds { 11671da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11681da177e4SLinus Torvalds 11691da177e4SLinus Torvalds list_del(&stp->st_hash); 11701da177e4SLinus Torvalds list_del(&stp->st_perfile); 1171ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11721da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11731da177e4SLinus Torvalds release_stateid_lockowners(stp); 11741da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11751da177e4SLinus Torvalds nfsd_close(filp); 11761da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11771da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 117813cd2184SNeilBrown put_nfs4_file(stp->st_file); 11795ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 1182fd39ca9aSNeilBrown static void 11831da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11861da177e4SLinus Torvalds 1187358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11881da177e4SLinus Torvalds sop->so_time = get_seconds(); 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 11911da177e4SLinus Torvalds static int 1192599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1193599e0a22SJ. Bruce Fields clientid_t *clid) 1194599e0a22SJ. Bruce Fields { 1195599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1196599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1197599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 12001da177e4SLinus Torvalds static struct nfs4_stateowner * 12011da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12021da177e4SLinus Torvalds { 12031da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1206599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 12071da177e4SLinus Torvalds return so; 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds return NULL; 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12131da177e4SLinus Torvalds static struct nfs4_file * 12141da177e4SLinus Torvalds find_file(struct inode *ino) 12151da177e4SLinus Torvalds { 12161da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12171da177e4SLinus Torvalds struct nfs4_file *fp; 12181da177e4SLinus Torvalds 12191da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 122013cd2184SNeilBrown if (fp->fi_inode == ino) { 122113cd2184SNeilBrown get_nfs4_file(fp); 12221da177e4SLinus Torvalds return fp; 12231da177e4SLinus Torvalds } 122413cd2184SNeilBrown } 12251da177e4SLinus Torvalds return NULL; 12261da177e4SLinus Torvalds } 12271da177e4SLinus Torvalds 1228ba5a6a19SJ. Bruce Fields static int access_valid(u32 x) 1229ba5a6a19SJ. Bruce Fields { 1230ba5a6a19SJ. Bruce Fields return (x > 0 && x < 4); 1231ba5a6a19SJ. Bruce Fields } 1232ba5a6a19SJ. Bruce Fields 1233ba5a6a19SJ. Bruce Fields static int deny_valid(u32 x) 1234ba5a6a19SJ. Bruce Fields { 1235ba5a6a19SJ. Bruce Fields return (x >= 0 && x < 5); 1236ba5a6a19SJ. Bruce Fields } 12371da177e4SLinus Torvalds 1238fd39ca9aSNeilBrown static void 12391da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12401da177e4SLinus Torvalds int i; 12411da177e4SLinus Torvalds 12421da177e4SLinus Torvalds *access = 0; 12431da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12441da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12451da177e4SLinus Torvalds *access |= i; 12461da177e4SLinus Torvalds } 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds 1249fd39ca9aSNeilBrown static void 12501da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12511da177e4SLinus Torvalds int i; 12521da177e4SLinus Torvalds 12531da177e4SLinus Torvalds *deny = 0; 12541da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12551da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12561da177e4SLinus Torvalds *deny |= i ; 12571da177e4SLinus Torvalds } 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds 12601da177e4SLinus Torvalds static int 12611da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12621da177e4SLinus Torvalds unsigned int access, deny; 12631da177e4SLinus Torvalds 12641da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12651da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12661da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12671da177e4SLinus Torvalds return 0; 12681da177e4SLinus Torvalds return 1; 12691da177e4SLinus Torvalds } 12701da177e4SLinus Torvalds 12711da177e4SLinus Torvalds /* 12721da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12731da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12741da177e4SLinus Torvalds */ 1275b37ad28bSAl Viro static __be32 12761da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12771da177e4SLinus Torvalds { 12781da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12791da177e4SLinus Torvalds struct nfs4_file *fp; 12801da177e4SLinus Torvalds struct nfs4_stateid *stp; 1281b37ad28bSAl Viro __be32 ret; 12821da177e4SLinus Torvalds 12831da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12841da177e4SLinus Torvalds 12851da177e4SLinus Torvalds fp = find_file(ino); 128613cd2184SNeilBrown if (!fp) 128713cd2184SNeilBrown return nfs_ok; 1288b700949bSNeilBrown ret = nfserr_locked; 12891da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12908beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12911da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12921da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 129313cd2184SNeilBrown goto out; 12941da177e4SLinus Torvalds } 129513cd2184SNeilBrown ret = nfs_ok; 129613cd2184SNeilBrown out: 129713cd2184SNeilBrown put_nfs4_file(fp); 129813cd2184SNeilBrown return ret; 12991da177e4SLinus Torvalds } 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvalds static inline void 13021da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13031da177e4SLinus Torvalds { 13041da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13057eaa36e2SJosef "Jeff" Sipek put_write_access(filp->f_path.dentry->d_inode); 13061da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds 13101da177e4SLinus Torvalds /* 13111da177e4SLinus Torvalds * Recall a delegation 13121da177e4SLinus Torvalds */ 13131da177e4SLinus Torvalds static int 13141da177e4SLinus Torvalds do_recall(void *__dp) 13151da177e4SLinus Torvalds { 13161da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13171da177e4SLinus Torvalds 131847f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 13191da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13201da177e4SLinus Torvalds return 0; 13211da177e4SLinus Torvalds } 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds /* 13241da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13251da177e4SLinus Torvalds * by the lease (file_lock) 13261da177e4SLinus Torvalds * 13271da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13281da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13291da177e4SLinus Torvalds * lease. 13301da177e4SLinus Torvalds */ 13311da177e4SLinus Torvalds static 13321da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13331da177e4SLinus Torvalds { 13341da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13351da177e4SLinus Torvalds struct task_struct *t; 13361da177e4SLinus Torvalds 13371da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13381da177e4SLinus Torvalds if (!dp) 13391da177e4SLinus Torvalds return; 13401da177e4SLinus Torvalds 13411da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13421da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13431da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13441da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13451da177e4SLinus Torvalds * it's safe to take a reference: */ 13461da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1347cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13481da177e4SLinus Torvalds 13491da177e4SLinus Torvalds spin_lock(&recall_lock); 13501da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13511da177e4SLinus Torvalds spin_unlock(&recall_lock); 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13541da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13551da177e4SLinus Torvalds 13560272e1fdSJ. Bruce Fields /* 13570272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13580272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13590272e1fdSJ. Bruce Fields * in time. 13600272e1fdSJ. Bruce Fields */ 13610272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13641da177e4SLinus Torvalds if (IS_ERR(t)) { 13651da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13681da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13691da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1370cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13711da177e4SLinus Torvalds nfs4_put_delegation(dp); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds 13751da177e4SLinus Torvalds /* 13761da177e4SLinus Torvalds * The file_lock is being reapd. 13771da177e4SLinus Torvalds * 13781da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13791da177e4SLinus Torvalds */ 13801da177e4SLinus Torvalds static 13811da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13821da177e4SLinus Torvalds { 13831da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13881da177e4SLinus Torvalds return; 13891da177e4SLinus Torvalds dp->dl_flock = NULL; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds /* 13931da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13941da177e4SLinus Torvalds * 1395a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 13961da177e4SLinus Torvalds */ 13971da177e4SLinus Torvalds static 13981da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13991da177e4SLinus Torvalds { 14001da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14031da177e4SLinus Torvalds if (!dp) 14041da177e4SLinus Torvalds return; 14051da177e4SLinus Torvalds dp->dl_flock = new; 14061da177e4SLinus Torvalds } 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds /* 1409a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 14101da177e4SLinus Torvalds */ 14111da177e4SLinus Torvalds static 14121da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14131da177e4SLinus Torvalds { 14141da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14151da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14161da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14171da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14201da177e4SLinus Torvalds return 0; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds static 14271da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14281da177e4SLinus Torvalds { 14291da177e4SLinus Torvalds if (arg & F_UNLCK) 14301da177e4SLinus Torvalds return lease_modify(onlist, arg); 14311da177e4SLinus Torvalds else 14321da177e4SLinus Torvalds return -EAGAIN; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 1435fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14361da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14371da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14381da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14391da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14401da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14411da177e4SLinus Torvalds }; 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds 1444b37ad28bSAl Viro __be32 14451da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14461da177e4SLinus Torvalds { 14471da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14481da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14491da177e4SLinus Torvalds unsigned int strhashval; 14501da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14530f442aa2SJ. Bruce Fields return nfserr_inval; 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14561da177e4SLinus Torvalds return nfserr_stale_clientid; 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14591da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14601da177e4SLinus Torvalds open->op_stateowner = sop; 14610f442aa2SJ. Bruce Fields if (!sop) { 14620f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14630f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14640f442aa2SJ. Bruce Fields if (clp == NULL) 14650f442aa2SJ. Bruce Fields return nfserr_expired; 14660f442aa2SJ. Bruce Fields goto renew; 14670f442aa2SJ. Bruce Fields } 1468ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14690f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1470ae8b6253SJ. Bruce Fields clp = sop->so_client; 1471ae8b6253SJ. Bruce Fields release_stateowner(sop); 14720f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1473ae8b6253SJ. Bruce Fields goto renew; 14740f442aa2SJ. Bruce Fields } 14750f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14761da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1477a90b061cSAl Viro return nfserr_replay_me; 14781da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14791da177e4SLinus Torvalds * that we don't even have replay data saved! 14801da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14811da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14821da177e4SLinus Torvalds * fail again for the same reason. 14831da177e4SLinus Torvalds */ 14840f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14851da177e4SLinus Torvalds goto renew; 14861da177e4SLinus Torvalds } 14870f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14880f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14890f442aa2SJ. Bruce Fields renew: 14900f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14911da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14921da177e4SLinus Torvalds if (sop == NULL) 14930f442aa2SJ. Bruce Fields return nfserr_resource; 14941da177e4SLinus Torvalds open->op_stateowner = sop; 14950f442aa2SJ. Bruce Fields } 14960f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14971da177e4SLinus Torvalds renew_client(sop->so_client); 14980f442aa2SJ. Bruce Fields return nfs_ok; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds 1501b37ad28bSAl Viro static inline __be32 15024a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15034a6e43e6SNeilBrown { 15044a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15054a6e43e6SNeilBrown return nfserr_openmode; 15064a6e43e6SNeilBrown else 15074a6e43e6SNeilBrown return nfs_ok; 15084a6e43e6SNeilBrown } 15094a6e43e6SNeilBrown 151052f4fb43SNeilBrown static struct nfs4_delegation * 151152f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 151252f4fb43SNeilBrown { 151352f4fb43SNeilBrown struct nfs4_delegation *dp; 151452f4fb43SNeilBrown 1515ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 151652f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 151752f4fb43SNeilBrown return dp; 151852f4fb43SNeilBrown } 151952f4fb43SNeilBrown return NULL; 152052f4fb43SNeilBrown } 152152f4fb43SNeilBrown 1522b37ad28bSAl Viro static __be32 1523567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1524567d9829SNeilBrown struct nfs4_delegation **dp) 1525567d9829SNeilBrown { 1526567d9829SNeilBrown int flags; 1527b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1528567d9829SNeilBrown 1529567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1530567d9829SNeilBrown if (*dp == NULL) 1531c44c5eebSNeilBrown goto out; 1532567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1533567d9829SNeilBrown RD_STATE : WR_STATE; 1534567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1535567d9829SNeilBrown if (status) 1536567d9829SNeilBrown *dp = NULL; 1537c44c5eebSNeilBrown out: 1538c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1539c44c5eebSNeilBrown return nfs_ok; 1540c44c5eebSNeilBrown if (status) 1541c44c5eebSNeilBrown return status; 1542c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1543c44c5eebSNeilBrown return nfs_ok; 1544567d9829SNeilBrown } 1545567d9829SNeilBrown 1546b37ad28bSAl Viro static __be32 15471da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15481da177e4SLinus Torvalds { 15491da177e4SLinus Torvalds struct nfs4_stateid *local; 1550b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15511da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15521da177e4SLinus Torvalds 15538beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15541da177e4SLinus Torvalds /* ignore lock owners */ 15551da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15561da177e4SLinus Torvalds continue; 15571da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15581da177e4SLinus Torvalds if (local->st_stateowner == sop) 15591da177e4SLinus Torvalds *stpp = local; 15601da177e4SLinus Torvalds /* check for conflicting share reservations */ 15611da177e4SLinus Torvalds if (!test_share(local, open)) 15621da177e4SLinus Torvalds goto out; 15631da177e4SLinus Torvalds } 15641da177e4SLinus Torvalds status = 0; 15651da177e4SLinus Torvalds out: 15661da177e4SLinus Torvalds return status; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds 15695ac049acSNeilBrown static inline struct nfs4_stateid * 15705ac049acSNeilBrown nfs4_alloc_stateid(void) 15715ac049acSNeilBrown { 15725ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15735ac049acSNeilBrown } 15745ac049acSNeilBrown 1575b37ad28bSAl Viro static __be32 15761da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1577567d9829SNeilBrown struct nfs4_delegation *dp, 15781da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15791da177e4SLinus Torvalds { 15801da177e4SLinus Torvalds struct nfs4_stateid *stp; 15811da177e4SLinus Torvalds 15825ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15831da177e4SLinus Torvalds if (stp == NULL) 15841da177e4SLinus Torvalds return nfserr_resource; 15851da177e4SLinus Torvalds 1586567d9829SNeilBrown if (dp) { 1587567d9829SNeilBrown get_file(dp->dl_vfs_file); 1588567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1589567d9829SNeilBrown } else { 1590b37ad28bSAl Viro __be32 status; 1591567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1592567d9829SNeilBrown &stp->st_vfs_file); 15931da177e4SLinus Torvalds if (status) { 15941da177e4SLinus Torvalds if (status == nfserr_dropit) 15951da177e4SLinus Torvalds status = nfserr_jukebox; 15965ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15971da177e4SLinus Torvalds return status; 15981da177e4SLinus Torvalds } 1599567d9829SNeilBrown } 16001da177e4SLinus Torvalds *stpp = stp; 16011da177e4SLinus Torvalds return 0; 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds 1604b37ad28bSAl Viro static inline __be32 16051da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16061da177e4SLinus Torvalds struct nfsd4_open *open) 16071da177e4SLinus Torvalds { 16081da177e4SLinus Torvalds struct iattr iattr = { 16091da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16101da177e4SLinus Torvalds .ia_size = 0, 16111da177e4SLinus Torvalds }; 16121da177e4SLinus Torvalds if (!open->op_truncate) 16131da177e4SLinus Torvalds return 0; 16141da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16159246585aSAl Viro return nfserr_inval; 16161da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16171da177e4SLinus Torvalds } 16181da177e4SLinus Torvalds 1619b37ad28bSAl Viro static __be32 16201da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16211da177e4SLinus Torvalds { 16221da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16237eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 16246c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1625b37ad28bSAl Viro __be32 status; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16286c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16296c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16301da177e4SLinus Torvalds 16316c26d08fSJ. Bruce Fields if (new_writer) { 1632b37ad28bSAl Viro int err = get_write_access(inode); 1633b37ad28bSAl Viro if (err) 1634b37ad28bSAl Viro return nfserrno(err); 16356c26d08fSJ. Bruce Fields } 16361da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16371da177e4SLinus Torvalds if (status) { 16386c26d08fSJ. Bruce Fields if (new_writer) 16391da177e4SLinus Torvalds put_write_access(inode); 16401da177e4SLinus Torvalds return status; 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds /* remember the open */ 16436c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16441da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16451da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds return nfs_ok; 16481da177e4SLinus Torvalds } 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds 16511da177e4SLinus Torvalds static void 165237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16531da177e4SLinus Torvalds { 16541da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1655c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16561da177e4SLinus Torvalds } 16571da177e4SLinus Torvalds 16581da177e4SLinus Torvalds /* 16591da177e4SLinus Torvalds * Attempt to hand out a delegation. 16601da177e4SLinus Torvalds */ 16611da177e4SLinus Torvalds static void 16621da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds struct nfs4_delegation *dp; 16651da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16661da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16671da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16681da177e4SLinus Torvalds int status, flag = 0; 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16717b190fecSNeilBrown open->op_recall = 0; 16727b190fecSNeilBrown switch (open->op_claim_type) { 16737b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16747b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16757b190fecSNeilBrown open->op_recall = 1; 16767b190fecSNeilBrown flag = open->op_delegate_type; 16777b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16781da177e4SLinus Torvalds goto out; 16797b190fecSNeilBrown break; 16807b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16817b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16827b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16837b190fecSNeilBrown if (nfs4_in_grace()) 16847b190fecSNeilBrown goto out; 16857b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16867b190fecSNeilBrown goto out; 16871da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16881da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16891da177e4SLinus Torvalds else 16901da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16917b190fecSNeilBrown break; 16927b190fecSNeilBrown default: 16937b190fecSNeilBrown goto out; 16947b190fecSNeilBrown } 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16971da177e4SLinus Torvalds if (dp == NULL) { 16981da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16991da177e4SLinus Torvalds goto out; 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds locks_init_lock(&fl); 17021da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17031da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17041da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17051da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17061da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17071da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17081da177e4SLinus Torvalds 1709a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 17101da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17111da177e4SLinus Torvalds */ 1712a9933ceaSJ. Bruce Fields if ((status = vfs_setlease(stp->st_vfs_file, 17131da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17141da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1715c907132dSNeilBrown unhash_delegation(dp); 17161da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17171da177e4SLinus Torvalds goto out; 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17211da177e4SLinus Torvalds 17221da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17231da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17241da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17251da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17261da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17271da177e4SLinus Torvalds out: 17287b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17297b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17307b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17312fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 17321da177e4SLinus Torvalds open->op_delegate_type = flag; 17331da177e4SLinus Torvalds } 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds /* 17361da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17371da177e4SLinus Torvalds */ 1738b37ad28bSAl Viro __be32 17391da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17401da177e4SLinus Torvalds { 17411da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17421da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17431da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1744567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1745b37ad28bSAl Viro __be32 status; 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds status = nfserr_inval; 1748ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1749ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17501da177e4SLinus Torvalds goto out; 17511da177e4SLinus Torvalds /* 17521da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17531da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17541da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17551da177e4SLinus Torvalds */ 17561da177e4SLinus Torvalds fp = find_file(ino); 17571da177e4SLinus Torvalds if (fp) { 17581da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17591da177e4SLinus Torvalds goto out; 1760c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1761c44c5eebSNeilBrown if (status) 1762c44c5eebSNeilBrown goto out; 17631da177e4SLinus Torvalds } else { 1764c44c5eebSNeilBrown status = nfserr_bad_stateid; 1765c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1766c44c5eebSNeilBrown goto out; 17671da177e4SLinus Torvalds status = nfserr_resource; 17681da177e4SLinus Torvalds fp = alloc_init_file(ino); 17691da177e4SLinus Torvalds if (fp == NULL) 17701da177e4SLinus Torvalds goto out; 17711da177e4SLinus Torvalds } 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds /* 17741da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17751da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17761da177e4SLinus Torvalds */ 17771da177e4SLinus Torvalds if (stp) { 17781da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17791da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17801da177e4SLinus Torvalds if (status) 17811da177e4SLinus Torvalds goto out; 1782444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17831da177e4SLinus Torvalds } else { 17841da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17851da177e4SLinus Torvalds int flags = 0; 17869ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17879ecb6a08SJ. Bruce Fields flags |= MAY_READ; 17881da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17899ecb6a08SJ. Bruce Fields flags |= MAY_WRITE; 1790567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1791567d9829SNeilBrown if (status) 17921da177e4SLinus Torvalds goto out; 17931da177e4SLinus Torvalds init_stateid(stp, fp, open); 17941da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17951da177e4SLinus Torvalds if (status) { 17961da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17971da177e4SLinus Torvalds goto out; 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds } 18001da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18011da177e4SLinus Torvalds 18021da177e4SLinus Torvalds /* 18031da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18041da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18051da177e4SLinus Torvalds */ 18061da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18071da177e4SLinus Torvalds 18081da177e4SLinus Torvalds status = nfs_ok; 18091da177e4SLinus Torvalds 18101da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18111da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18121da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18131da177e4SLinus Torvalds out: 181413cd2184SNeilBrown if (fp) 181513cd2184SNeilBrown put_nfs4_file(fp); 181637515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 181737515177SNeilBrown nfs4_set_claim_prev(open); 18181da177e4SLinus Torvalds /* 18191da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18201da177e4SLinus Torvalds */ 18211da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18221da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18231da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18241da177e4SLinus Torvalds 18251da177e4SLinus Torvalds return status; 18261da177e4SLinus Torvalds } 18271da177e4SLinus Torvalds 182858da282bSNeilBrown static struct workqueue_struct *laundry_wq; 1829c4028958SDavid Howells static void laundromat_main(struct work_struct *); 1830c4028958SDavid Howells static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 18311da177e4SLinus Torvalds 1832b37ad28bSAl Viro __be32 1833b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1834b591480bSJ.Bruce Fields clientid_t *clid) 18351da177e4SLinus Torvalds { 18361da177e4SLinus Torvalds struct nfs4_client *clp; 1837b37ad28bSAl Viro __be32 status; 18381da177e4SLinus Torvalds 18391da177e4SLinus Torvalds nfs4_lock_state(); 18401da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18411da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18421da177e4SLinus Torvalds status = nfserr_stale_clientid; 18431da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18441da177e4SLinus Torvalds goto out; 18451da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18461da177e4SLinus Torvalds status = nfserr_expired; 18471da177e4SLinus Torvalds if (clp == NULL) { 18481da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18491da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18501da177e4SLinus Torvalds goto out; 18511da177e4SLinus Torvalds } 18521da177e4SLinus Torvalds renew_client(clp); 18531da177e4SLinus Torvalds status = nfserr_cb_path_down; 1854ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18551da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18561da177e4SLinus Torvalds goto out; 18571da177e4SLinus Torvalds status = nfs_ok; 18581da177e4SLinus Torvalds out: 18591da177e4SLinus Torvalds nfs4_unlock_state(); 18601da177e4SLinus Torvalds return status; 18611da177e4SLinus Torvalds } 18621da177e4SLinus Torvalds 1863a76b4319SNeilBrown static void 1864a76b4319SNeilBrown end_grace(void) 1865a76b4319SNeilBrown { 1866a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1867c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1868a76b4319SNeilBrown in_grace = 0; 1869a76b4319SNeilBrown } 1870a76b4319SNeilBrown 1871fd39ca9aSNeilBrown static time_t 18721da177e4SLinus Torvalds nfs4_laundromat(void) 18731da177e4SLinus Torvalds { 18741da177e4SLinus Torvalds struct nfs4_client *clp; 18751da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18761da177e4SLinus Torvalds struct nfs4_delegation *dp; 18771da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18781da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18791da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18801da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18811da177e4SLinus Torvalds 18821da177e4SLinus Torvalds nfs4_lock_state(); 18831da177e4SLinus Torvalds 18841da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1885a76b4319SNeilBrown if (in_grace) 1886a76b4319SNeilBrown end_grace(); 18871da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18881da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18891da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18901da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18911da177e4SLinus Torvalds if (clientid_val > t) 18921da177e4SLinus Torvalds clientid_val = t; 18931da177e4SLinus Torvalds break; 18941da177e4SLinus Torvalds } 18951da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18961da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1897c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18981da177e4SLinus Torvalds expire_client(clp); 18991da177e4SLinus Torvalds } 19001da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19011da177e4SLinus Torvalds spin_lock(&recall_lock); 19021da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19031da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19041da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19051da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19061da177e4SLinus Torvalds if (test_val > u) 19071da177e4SLinus Torvalds test_val = u; 19081da177e4SLinus Torvalds break; 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19111da177e4SLinus Torvalds dp, dp->dl_flock); 19121da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19131da177e4SLinus Torvalds } 19141da177e4SLinus Torvalds spin_unlock(&recall_lock); 19151da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19161da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19171da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19181da177e4SLinus Torvalds unhash_delegation(dp); 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19211da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19221da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19231da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19241da177e4SLinus Torvalds u = sop->so_time - cutoff; 19251da177e4SLinus Torvalds if (test_val > u) 19261da177e4SLinus Torvalds test_val = u; 19271da177e4SLinus Torvalds break; 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19301da177e4SLinus Torvalds sop->so_id); 1931358dd55aSNeilBrown release_stateowner(sop); 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19341da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19351da177e4SLinus Torvalds nfs4_unlock_state(); 19361da177e4SLinus Torvalds return clientid_val; 19371da177e4SLinus Torvalds } 19381da177e4SLinus Torvalds 19391da177e4SLinus Torvalds void 1940c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19411da177e4SLinus Torvalds { 19421da177e4SLinus Torvalds time_t t; 19431da177e4SLinus Torvalds 19441da177e4SLinus Torvalds t = nfs4_laundromat(); 19451da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 194658da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 1949fd39ca9aSNeilBrown static struct nfs4_stateowner * 1950f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1951f8816512SNeilBrown { 19521da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19551da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19561da177e4SLinus Torvalds if (local->so_id == st_id) 19571da177e4SLinus Torvalds return local; 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds } 19601da177e4SLinus Torvalds return NULL; 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds 19631da177e4SLinus Torvalds static inline int 19641da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19651da177e4SLinus Torvalds { 19667eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds static int 19701da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19711da177e4SLinus Torvalds { 19721da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19731da177e4SLinus Torvalds return 0; 1974849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19751da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19761da177e4SLinus Torvalds stateid->si_generation); 19771da177e4SLinus Torvalds return 1; 19781da177e4SLinus Torvalds } 19791da177e4SLinus Torvalds 19801da177e4SLinus Torvalds static inline int 19811da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19821da177e4SLinus Torvalds { 19831da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19841da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19851da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19861da177e4SLinus Torvalds } 19871da177e4SLinus Torvalds 19881da177e4SLinus Torvalds static inline int 19891da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19901da177e4SLinus Torvalds { 19911da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19921da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19931da177e4SLinus Torvalds } 19941da177e4SLinus Torvalds 19951da177e4SLinus Torvalds static 1996b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19971da177e4SLinus Torvalds { 1998b37ad28bSAl Viro __be32 status = nfserr_openmode; 19991da177e4SLinus Torvalds 20001da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20011da177e4SLinus Torvalds goto out; 20021da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20031da177e4SLinus Torvalds goto out; 20041da177e4SLinus Torvalds status = nfs_ok; 20051da177e4SLinus Torvalds out: 20061da177e4SLinus Torvalds return status; 20071da177e4SLinus Torvalds } 20081da177e4SLinus Torvalds 2009b37ad28bSAl Viro static inline __be32 20101da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20111da177e4SLinus Torvalds { 20121da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20131da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20141da177e4SLinus Torvalds return nfserr_bad_stateid; 20151da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20161da177e4SLinus Torvalds return nfs_ok; 20171da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20181da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20191da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20201da177e4SLinus Torvalds return nfserr_grace; 20211da177e4SLinus Torvalds } else if (flags & WR_STATE) 20221da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20231da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20241da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20251da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20261da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20271da177e4SLinus Torvalds } 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds /* 20301da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20311da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20321da177e4SLinus Torvalds */ 20331da177e4SLinus Torvalds static inline int 20341da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20351da177e4SLinus Torvalds { 20361da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 2037a16877caSPavel Emelyanov && mandatory_lock(inode); 20381da177e4SLinus Torvalds } 20391da177e4SLinus Torvalds 20401da177e4SLinus Torvalds /* 20411da177e4SLinus Torvalds * Checks for stateid operations 20421da177e4SLinus Torvalds */ 2043b37ad28bSAl Viro __be32 20441da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20451da177e4SLinus Torvalds { 20461da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20471da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20481da177e4SLinus Torvalds stateid_t *stidp; 20491da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2050b37ad28bSAl Viro __be32 status; 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20531da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20541da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20551da177e4SLinus Torvalds if (filpp) 20561da177e4SLinus Torvalds *filpp = NULL; 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20591da177e4SLinus Torvalds return nfserr_grace; 20601da177e4SLinus Torvalds 20611da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20621da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds /* STALE STATEID */ 20651da177e4SLinus Torvalds status = nfserr_stale_stateid; 20661da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20671da177e4SLinus Torvalds goto out; 20681da177e4SLinus Torvalds 20691da177e4SLinus Torvalds /* BAD STATEID */ 20701da177e4SLinus Torvalds status = nfserr_bad_stateid; 20711da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20721da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20731da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20741da177e4SLinus Torvalds goto out; 20751da177e4SLinus Torvalds } 20761da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20771da177e4SLinus Torvalds } else { /* open or lock stateid */ 20781da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20791da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20801da177e4SLinus Torvalds goto out; 20811da177e4SLinus Torvalds } 20821da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20831da177e4SLinus Torvalds goto out; 20841da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20851da177e4SLinus Torvalds goto out; 20861da177e4SLinus Torvalds stidp = &stp->st_stateid; 20871da177e4SLinus Torvalds } 20881da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 20891da177e4SLinus Torvalds goto out; 20901da177e4SLinus Torvalds 20911da177e4SLinus Torvalds /* OLD STATEID */ 20921da177e4SLinus Torvalds status = nfserr_old_stateid; 20931da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 20941da177e4SLinus Torvalds goto out; 20951da177e4SLinus Torvalds if (stp) { 20961da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 20971da177e4SLinus Torvalds goto out; 20981da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 20991da177e4SLinus Torvalds if (filpp) 21001da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21011da177e4SLinus Torvalds } else if (dp) { 21021da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 21031da177e4SLinus Torvalds goto out; 21041da177e4SLinus Torvalds renew_client(dp->dl_client); 21051da177e4SLinus Torvalds if (flags & DELEG_RET) 21061da177e4SLinus Torvalds unhash_delegation(dp); 21071da177e4SLinus Torvalds if (filpp) 21081da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21091da177e4SLinus Torvalds } 21101da177e4SLinus Torvalds status = nfs_ok; 21111da177e4SLinus Torvalds out: 21121da177e4SLinus Torvalds return status; 21131da177e4SLinus Torvalds } 21141da177e4SLinus Torvalds 21154c4cd222SNeilBrown static inline int 21164c4cd222SNeilBrown setlkflg (int type) 21174c4cd222SNeilBrown { 21184c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21194c4cd222SNeilBrown RD_STATE : WR_STATE; 21204c4cd222SNeilBrown } 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvalds /* 21231da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21241da177e4SLinus Torvalds */ 2125b37ad28bSAl Viro static __be32 21264c4cd222SNeilBrown 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) 21271da177e4SLinus Torvalds { 21281da177e4SLinus Torvalds struct nfs4_stateid *stp; 21291da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21301da177e4SLinus Torvalds 21311da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21321da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21331da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21341da177e4SLinus Torvalds stateid->si_generation); 21351da177e4SLinus Torvalds 21361da177e4SLinus Torvalds *stpp = NULL; 21371da177e4SLinus Torvalds *sopp = NULL; 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21402fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21413a4f98bbSNeilBrown return nfserr_bad_stateid; 21421da177e4SLinus Torvalds } 21431da177e4SLinus Torvalds 21441da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21453a4f98bbSNeilBrown return nfserr_stale_stateid; 21461da177e4SLinus Torvalds /* 21471da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21481da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21491da177e4SLinus Torvalds * number is incorrect. 21501da177e4SLinus Torvalds */ 2151f8816512SNeilBrown stp = find_stateid(stateid, flags); 2152f8816512SNeilBrown if (stp == NULL) { 2153f8816512SNeilBrown /* 2154f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2155f8816512SNeilBrown * a replayed close: 2156f8816512SNeilBrown */ 2157f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2158f8816512SNeilBrown if (sop == NULL) 2159f8816512SNeilBrown return nfserr_bad_stateid; 2160f8816512SNeilBrown *sopp = sop; 2161f8816512SNeilBrown goto check_replay; 2162f8816512SNeilBrown } 21631da177e4SLinus Torvalds 21644c4cd222SNeilBrown if (lock) { 21651da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21664c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21671da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21684c4cd222SNeilBrown int lkflg = 0; 2169b37ad28bSAl Viro __be32 status; 21701da177e4SLinus Torvalds 21714c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21724c4cd222SNeilBrown 21734c4cd222SNeilBrown if (lock->lk_is_new) { 21741da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21753a4f98bbSNeilBrown return nfserr_bad_stateid; 2176599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 21773a4f98bbSNeilBrown return nfserr_bad_stateid; 21784c4cd222SNeilBrown /* stp is the open stateid */ 21794c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21804c4cd222SNeilBrown if (status) 21814c4cd222SNeilBrown return status; 21824c4cd222SNeilBrown } else { 21834c4cd222SNeilBrown /* stp is the lock stateid */ 21844c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21854c4cd222SNeilBrown if (status) 21864c4cd222SNeilBrown return status; 21874c4cd222SNeilBrown } 21881da177e4SLinus Torvalds } 21891da177e4SLinus Torvalds 21901da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 21912fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21923a4f98bbSNeilBrown return nfserr_bad_stateid; 21931da177e4SLinus Torvalds } 21941da177e4SLinus Torvalds 21951da177e4SLinus Torvalds *stpp = stp; 21961da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 21971da177e4SLinus Torvalds 21981da177e4SLinus Torvalds /* 21991da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22001da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22011da177e4SLinus Torvalds * generation number wraparound. 22021da177e4SLinus Torvalds */ 2203bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22041da177e4SLinus Torvalds goto check_replay; 22051da177e4SLinus Torvalds 22063a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22072fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 22083a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22093a4f98bbSNeilBrown return nfserr_bad_stateid; 22101da177e4SLinus Torvalds } 22113a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22122fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 22133a4f98bbSNeilBrown " confirmed yet!\n"); 22143a4f98bbSNeilBrown return nfserr_bad_stateid; 22151da177e4SLinus Torvalds } 22161da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22172fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22183a4f98bbSNeilBrown return nfserr_bad_stateid; 22191da177e4SLinus Torvalds } 22201da177e4SLinus Torvalds 22211da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22222fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: old stateid!\n"); 22233a4f98bbSNeilBrown return nfserr_old_stateid; 22241da177e4SLinus Torvalds } 222552fd004eSNeilBrown renew_client(sop->so_client); 22263a4f98bbSNeilBrown return nfs_ok; 22271da177e4SLinus Torvalds 22281da177e4SLinus Torvalds check_replay: 2229bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2230849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22311da177e4SLinus Torvalds /* indicate replay to calling function */ 2232a90b061cSAl Viro return nfserr_replay_me; 22331da177e4SLinus Torvalds } 22342fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22353a4f98bbSNeilBrown sop->so_seqid, seqid); 22363a4f98bbSNeilBrown *sopp = NULL; 22373a4f98bbSNeilBrown return nfserr_bad_seqid; 22381da177e4SLinus Torvalds } 22391da177e4SLinus Torvalds 2240b37ad28bSAl Viro __be32 2241ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2242a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22431da177e4SLinus Torvalds { 2244b37ad28bSAl Viro __be32 status; 22451da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22461da177e4SLinus Torvalds struct nfs4_stateid *stp; 22471da177e4SLinus Torvalds 22481da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2249ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2250ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22511da177e4SLinus Torvalds 2252ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2253a8cddc5dSJ. Bruce Fields if (status) 2254a8cddc5dSJ. Bruce Fields return status; 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds nfs4_lock_state(); 22571da177e4SLinus Torvalds 2258ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2259ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 22601da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22611da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22621da177e4SLinus Torvalds goto out; 22631da177e4SLinus Torvalds 22641da177e4SLinus Torvalds sop = oc->oc_stateowner; 22651da177e4SLinus Torvalds sop->so_confirmed = 1; 22661da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22671da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22681da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22691da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22701da177e4SLinus Torvalds stp->st_stateid.si_boot, 22711da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22721da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22731da177e4SLinus Torvalds stp->st_stateid.si_generation); 2274c7b9a459SNeilBrown 2275c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22761da177e4SLinus Torvalds out: 2277f2327d9aSNeil Brown if (oc->oc_stateowner) { 22781da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2279a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2280f2327d9aSNeil Brown } 22811da177e4SLinus Torvalds nfs4_unlock_state(); 22821da177e4SLinus Torvalds return status; 22831da177e4SLinus Torvalds } 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds 22861da177e4SLinus Torvalds /* 22871da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22881da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22891da177e4SLinus Torvalds */ 22901da177e4SLinus Torvalds static void 22911da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22921da177e4SLinus Torvalds { 22931da177e4SLinus Torvalds int i; 22941da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22951da177e4SLinus Torvalds if ((i & access) != i) 22961da177e4SLinus Torvalds __clear_bit(i, bmap); 22971da177e4SLinus Torvalds } 22981da177e4SLinus Torvalds } 22991da177e4SLinus Torvalds 23001da177e4SLinus Torvalds static void 23011da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23021da177e4SLinus Torvalds { 23031da177e4SLinus Torvalds int i; 23041da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23051da177e4SLinus Torvalds if ((i & deny) != i) 23061da177e4SLinus Torvalds __clear_bit(i, bmap); 23071da177e4SLinus Torvalds } 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds 2310b37ad28bSAl Viro __be32 2311ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2312ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2313a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 23141da177e4SLinus Torvalds { 2315b37ad28bSAl Viro __be32 status; 23161da177e4SLinus Torvalds struct nfs4_stateid *stp; 23171da177e4SLinus Torvalds unsigned int share_access; 23181da177e4SLinus Torvalds 23191da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2320ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2321ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23221da177e4SLinus Torvalds 2323ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2324ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23251da177e4SLinus Torvalds return nfserr_inval; 23261da177e4SLinus Torvalds 23271da177e4SLinus Torvalds nfs4_lock_state(); 2328ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2329ca364317SJ.Bruce Fields od->od_seqid, 23301da177e4SLinus Torvalds &od->od_stateid, 23311da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23321da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23331da177e4SLinus Torvalds goto out; 23341da177e4SLinus Torvalds 23351da177e4SLinus Torvalds status = nfserr_inval; 23361da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23371da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23381da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23391da177e4SLinus Torvalds goto out; 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23421da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23431da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23441da177e4SLinus Torvalds goto out; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23471da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23481da177e4SLinus Torvalds share_access & ~od->od_share_access); 23491da177e4SLinus Torvalds 23501da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23511da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23521da177e4SLinus Torvalds 23531da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23541da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23551da177e4SLinus Torvalds status = nfs_ok; 23561da177e4SLinus Torvalds out: 2357f2327d9aSNeil Brown if (od->od_stateowner) { 23581da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2359a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2360f2327d9aSNeil Brown } 23611da177e4SLinus Torvalds nfs4_unlock_state(); 23621da177e4SLinus Torvalds return status; 23631da177e4SLinus Torvalds } 23641da177e4SLinus Torvalds 23651da177e4SLinus Torvalds /* 23661da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23671da177e4SLinus Torvalds */ 2368b37ad28bSAl Viro __be32 2369ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2370a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23711da177e4SLinus Torvalds { 2372b37ad28bSAl Viro __be32 status; 23731da177e4SLinus Torvalds struct nfs4_stateid *stp; 23741da177e4SLinus Torvalds 23751da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2376ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2377ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23781da177e4SLinus Torvalds 23791da177e4SLinus Torvalds nfs4_lock_state(); 23801da177e4SLinus Torvalds /* check close_lru for replay */ 2381ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2382ca364317SJ.Bruce Fields close->cl_seqid, 23831da177e4SLinus Torvalds &close->cl_stateid, 23841da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23851da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23861da177e4SLinus Torvalds goto out; 23871da177e4SLinus Torvalds status = nfs_ok; 23881da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23891da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23901da177e4SLinus Torvalds 239104ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 239204ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 239304ef5954SJ. Bruce Fields 239404ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 239504ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 239604ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 239704ef5954SJ. Bruce Fields */ 239804ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 239904ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 24001da177e4SLinus Torvalds out: 2401f2327d9aSNeil Brown if (close->cl_stateowner) { 24021da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2403a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2404f2327d9aSNeil Brown } 24051da177e4SLinus Torvalds nfs4_unlock_state(); 24061da177e4SLinus Torvalds return status; 24071da177e4SLinus Torvalds } 24081da177e4SLinus Torvalds 2409b37ad28bSAl Viro __be32 2410ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2411ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 24121da177e4SLinus Torvalds { 2413b37ad28bSAl Viro __be32 status; 24141da177e4SLinus Torvalds 2415ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 24161da177e4SLinus Torvalds goto out; 24171da177e4SLinus Torvalds 24181da177e4SLinus Torvalds nfs4_lock_state(); 2419ca364317SJ.Bruce Fields status = nfs4_preprocess_stateid_op(&cstate->current_fh, 2420ca364317SJ.Bruce Fields &dr->dr_stateid, DELEG_RET, NULL); 24211da177e4SLinus Torvalds nfs4_unlock_state(); 24221da177e4SLinus Torvalds out: 24231da177e4SLinus Torvalds return status; 24241da177e4SLinus Torvalds } 24251da177e4SLinus Torvalds 24261da177e4SLinus Torvalds 24271da177e4SLinus Torvalds /* 24281da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24291da177e4SLinus Torvalds */ 24301da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24311da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24321da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24331da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24341da177e4SLinus Torvalds 24351da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24361da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24371da177e4SLinus Torvalds 24381da177e4SLinus Torvalds static inline unsigned int 24391da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24401da177e4SLinus Torvalds struct xdr_netobj *ownername) 24411da177e4SLinus Torvalds { 24421da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24431da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24441da177e4SLinus Torvalds & LOCK_HASH_MASK; 24451da177e4SLinus Torvalds } 24461da177e4SLinus Torvalds 24471da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24481da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24491da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24501da177e4SLinus Torvalds 2451fd39ca9aSNeilBrown static struct nfs4_stateid * 24521da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24531da177e4SLinus Torvalds { 24541da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24551da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24561da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24571da177e4SLinus Torvalds unsigned int hashval; 24581da177e4SLinus Torvalds 24591da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24601da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24611da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24621da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24631da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24641da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24651da177e4SLinus Torvalds return local; 24661da177e4SLinus Torvalds } 24671da177e4SLinus Torvalds } 24681da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24691da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24701da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24711da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24721da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24731da177e4SLinus Torvalds return local; 24741da177e4SLinus Torvalds } 2475849823c5SNeil Brown } 24761da177e4SLinus Torvalds return NULL; 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds 24791da177e4SLinus Torvalds static struct nfs4_delegation * 24801da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24811da177e4SLinus Torvalds { 248213cd2184SNeilBrown struct nfs4_file *fp; 248313cd2184SNeilBrown struct nfs4_delegation *dl; 24841da177e4SLinus Torvalds 24851da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24861da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24871da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24881da177e4SLinus Torvalds 24891da177e4SLinus Torvalds fp = find_file(ino); 249013cd2184SNeilBrown if (!fp) 24911da177e4SLinus Torvalds return NULL; 249213cd2184SNeilBrown dl = find_delegation_file(fp, stid); 249313cd2184SNeilBrown put_nfs4_file(fp); 249413cd2184SNeilBrown return dl; 24951da177e4SLinus Torvalds } 24961da177e4SLinus Torvalds 24971da177e4SLinus Torvalds /* 24981da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24991da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25001da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25011da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25021da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25031da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25041da177e4SLinus Torvalds */ 25051da177e4SLinus Torvalds static inline void 25061da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25071da177e4SLinus Torvalds { 25081da177e4SLinus Torvalds if (lock->fl_start < 0) 25091da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25101da177e4SLinus Torvalds if (lock->fl_end < 0) 25111da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25121da177e4SLinus Torvalds } 25131da177e4SLinus Torvalds 2514d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2515d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2516e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2517d5b9026aSNeilBrown }; 25181da177e4SLinus Torvalds 25191da177e4SLinus Torvalds static inline void 25201da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25211da177e4SLinus Torvalds { 2522d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2523d5b9026aSNeilBrown unsigned int hval; 25241da177e4SLinus Torvalds 2525d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2526d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2527d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25281da177e4SLinus Torvalds kref_get(&sop->so_ref); 25291da177e4SLinus Torvalds deny->ld_sop = sop; 25301da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2531d5b9026aSNeilBrown } else { 2532d5b9026aSNeilBrown deny->ld_sop = NULL; 2533d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2534d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25351da177e4SLinus Torvalds } 25361da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25371da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25381da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25391da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25401da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25411da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25421da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25431da177e4SLinus Torvalds } 25441da177e4SLinus Torvalds 25451da177e4SLinus Torvalds static struct nfs4_stateowner * 25461da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25471da177e4SLinus Torvalds struct xdr_netobj *owner) 25481da177e4SLinus Torvalds { 25491da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25501da177e4SLinus Torvalds struct nfs4_stateowner *op; 25511da177e4SLinus Torvalds 25521da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2553599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 25541da177e4SLinus Torvalds return op; 25551da177e4SLinus Torvalds } 25561da177e4SLinus Torvalds return NULL; 25571da177e4SLinus Torvalds } 25581da177e4SLinus Torvalds 25591da177e4SLinus Torvalds /* 25601da177e4SLinus Torvalds * Alloc a lock owner structure. 25611da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25621da177e4SLinus Torvalds * occured. 25631da177e4SLinus Torvalds * 25641da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25651da177e4SLinus Torvalds */ 25661da177e4SLinus Torvalds 25671da177e4SLinus Torvalds static struct nfs4_stateowner * 25681da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25701da177e4SLinus Torvalds struct nfs4_replay *rp; 25711da177e4SLinus Torvalds unsigned int idhashval; 25721da177e4SLinus Torvalds 25731da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25741da177e4SLinus Torvalds return NULL; 25751da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25761da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25771da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25781da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2579ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2580ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25811da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25821da177e4SLinus Torvalds sop->so_time = 0; 25831da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25841da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2585ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25861da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25871da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25881da177e4SLinus Torvalds sop->so_client = clp; 2589b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2590b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2591b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25921da177e4SLinus Torvalds sop->so_confirmed = 1; 25931da177e4SLinus Torvalds rp = &sop->so_replay; 2594de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25951da177e4SLinus Torvalds rp->rp_buflen = 0; 25961da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25971da177e4SLinus Torvalds return sop; 25981da177e4SLinus Torvalds } 25991da177e4SLinus Torvalds 2600fd39ca9aSNeilBrown static struct nfs4_stateid * 26011da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26021da177e4SLinus Torvalds { 26031da177e4SLinus Torvalds struct nfs4_stateid *stp; 26041da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26051da177e4SLinus Torvalds 26065ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26075ac049acSNeilBrown if (stp == NULL) 26081da177e4SLinus Torvalds goto out; 26091da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26101da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2611ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2612ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26131da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26148beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2615ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26161da177e4SLinus Torvalds stp->st_stateowner = sop; 261713cd2184SNeilBrown get_nfs4_file(fp); 26181da177e4SLinus Torvalds stp->st_file = fp; 26191da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26201da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26211da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26221da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26231da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26241da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26251da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26264c4cd222SNeilBrown stp->st_openstp = open_stp; 26271da177e4SLinus Torvalds 26281da177e4SLinus Torvalds out: 26291da177e4SLinus Torvalds return stp; 26301da177e4SLinus Torvalds } 26311da177e4SLinus Torvalds 2632fd39ca9aSNeilBrown static int 26331da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26341da177e4SLinus Torvalds { 26351da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26361da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26371da177e4SLinus Torvalds } 26381da177e4SLinus Torvalds 26391da177e4SLinus Torvalds /* 26401da177e4SLinus Torvalds * LOCK operation 26411da177e4SLinus Torvalds */ 2642b37ad28bSAl Viro __be32 2643ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2644a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26451da177e4SLinus Torvalds { 26463e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2647b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26481da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26491da177e4SLinus Torvalds struct file *filp; 26501da177e4SLinus Torvalds struct file_lock file_lock; 26518dc7c311SAndy Adamson struct file_lock conflock; 2652b37ad28bSAl Viro __be32 status = 0; 26531da177e4SLinus Torvalds unsigned int strhashval; 2654150b3934SMarc Eshel unsigned int cmd; 2655b8dd7b9aSAl Viro int err; 26561da177e4SLinus Torvalds 26571da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26581da177e4SLinus Torvalds (long long) lock->lk_offset, 26591da177e4SLinus Torvalds (long long) lock->lk_length); 26601da177e4SLinus Torvalds 26611da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26621da177e4SLinus Torvalds return nfserr_inval; 26631da177e4SLinus Torvalds 2664ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 2665ca364317SJ.Bruce Fields S_IFREG, MAY_LOCK))) { 2666a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2667a6f6ef2fSAndy Adamson return status; 2668a6f6ef2fSAndy Adamson } 2669a6f6ef2fSAndy Adamson 26701da177e4SLinus Torvalds nfs4_lock_state(); 26711da177e4SLinus Torvalds 26721da177e4SLinus Torvalds if (lock->lk_is_new) { 26731da177e4SLinus Torvalds /* 26741da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2675893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2676893f8770SNeilBrown * lock stateid. 26771da177e4SLinus Torvalds */ 26781da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26791da177e4SLinus Torvalds struct nfs4_file *fp; 26801da177e4SLinus Torvalds 26811da177e4SLinus Torvalds status = nfserr_stale_clientid; 2682849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26831da177e4SLinus Torvalds goto out; 26841da177e4SLinus Torvalds 26851da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2686ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26871da177e4SLinus Torvalds lock->lk_new_open_seqid, 26881da177e4SLinus Torvalds &lock->lk_new_open_stateid, 26891da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 26903a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2691b59e3c0eSNeil Brown lock); 269237515177SNeilBrown if (status) 26931da177e4SLinus Torvalds goto out; 26943a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26951da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26961da177e4SLinus Torvalds fp = open_stp->st_file; 26971da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26981da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26991da177e4SLinus Torvalds &lock->v.new.owner); 27003e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27013e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27023e9e3dbeSNeilBrown * create new stateids)? */ 27031da177e4SLinus Torvalds status = nfserr_resource; 2704b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2705b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2706b59e3c0eSNeil Brown if (lock_sop == NULL) 27071da177e4SLinus Torvalds goto out; 2708b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27098a280510SJ. Bruce Fields if (lock_stp == NULL) 27101da177e4SLinus Torvalds goto out; 27111da177e4SLinus Torvalds } else { 27121da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2713ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27141da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27151da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27161da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27173a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27181da177e4SLinus Torvalds if (status) 27191da177e4SLinus Torvalds goto out; 27203a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27211da177e4SLinus Torvalds } 27223a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27231da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27241da177e4SLinus Torvalds 27250dd395dcSNeilBrown status = nfserr_grace; 27260dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27270dd395dcSNeilBrown goto out; 27280dd395dcSNeilBrown status = nfserr_no_grace; 27290dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27300dd395dcSNeilBrown goto out; 27310dd395dcSNeilBrown 27321da177e4SLinus Torvalds locks_init_lock(&file_lock); 27331da177e4SLinus Torvalds switch (lock->lk_type) { 27341da177e4SLinus Torvalds case NFS4_READ_LT: 27351da177e4SLinus Torvalds case NFS4_READW_LT: 27361da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2737150b3934SMarc Eshel cmd = F_SETLK; 27381da177e4SLinus Torvalds break; 27391da177e4SLinus Torvalds case NFS4_WRITE_LT: 27401da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27411da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2742150b3934SMarc Eshel cmd = F_SETLK; 27431da177e4SLinus Torvalds break; 27441da177e4SLinus Torvalds default: 27451da177e4SLinus Torvalds status = nfserr_inval; 27461da177e4SLinus Torvalds goto out; 27471da177e4SLinus Torvalds } 2748b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27491da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27501da177e4SLinus Torvalds file_lock.fl_file = filp; 27511da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2752d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27531da177e4SLinus Torvalds 27541da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27551da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27561da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27571da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27581da177e4SLinus Torvalds else 27591da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27601da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27611da177e4SLinus Torvalds 27621da177e4SLinus Torvalds /* 27631da177e4SLinus Torvalds * Try to lock the file in the VFS. 27641da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27651da177e4SLinus Torvalds */ 27661da177e4SLinus Torvalds 2767eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2768eb76b3fdSAndy Adamson * locks_copy_lock: */ 2769150b3934SMarc Eshel locks_init_lock(&conflock); 2770fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2771b8dd7b9aSAl Viro switch (-err) { 27721da177e4SLinus Torvalds case 0: /* success! */ 27731da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27741da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27751da177e4SLinus Torvalds sizeof(stateid_t)); 2776b8dd7b9aSAl Viro status = 0; 2777eb76b3fdSAndy Adamson break; 2778eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2779eb76b3fdSAndy Adamson status = nfserr_denied; 2780eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2781eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2782eb76b3fdSAndy Adamson break; 27831da177e4SLinus Torvalds case (EDEADLK): 27841da177e4SLinus Torvalds status = nfserr_deadlock; 2785eb76b3fdSAndy Adamson break; 27861da177e4SLinus Torvalds default: 2787fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2788eb76b3fdSAndy Adamson status = nfserr_resource; 2789eb76b3fdSAndy Adamson break; 27901da177e4SLinus Torvalds } 27911da177e4SLinus Torvalds out: 27928a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27938a280510SJ. Bruce Fields release_stateowner(lock_sop); 27943a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27953a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2796a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2797f2327d9aSNeil Brown } 27981da177e4SLinus Torvalds nfs4_unlock_state(); 27991da177e4SLinus Torvalds return status; 28001da177e4SLinus Torvalds } 28011da177e4SLinus Torvalds 28021da177e4SLinus Torvalds /* 28031da177e4SLinus Torvalds * LOCKT operation 28041da177e4SLinus Torvalds */ 2805b37ad28bSAl Viro __be32 2806ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2807ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 28081da177e4SLinus Torvalds { 28091da177e4SLinus Torvalds struct inode *inode; 28101da177e4SLinus Torvalds struct file file; 28111da177e4SLinus Torvalds struct file_lock file_lock; 2812fd85b817SMarc Eshel int error; 2813b37ad28bSAl Viro __be32 status; 28141da177e4SLinus Torvalds 28151da177e4SLinus Torvalds if (nfs4_in_grace()) 28161da177e4SLinus Torvalds return nfserr_grace; 28171da177e4SLinus Torvalds 28181da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28191da177e4SLinus Torvalds return nfserr_inval; 28201da177e4SLinus Torvalds 28211da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28221da177e4SLinus Torvalds nfs4_lock_state(); 28231da177e4SLinus Torvalds 28241da177e4SLinus Torvalds status = nfserr_stale_clientid; 2825849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28261da177e4SLinus Torvalds goto out; 28271da177e4SLinus Torvalds 2828ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2829849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28301da177e4SLinus Torvalds if (status == nfserr_symlink) 28311da177e4SLinus Torvalds status = nfserr_inval; 28321da177e4SLinus Torvalds goto out; 28331da177e4SLinus Torvalds } 28341da177e4SLinus Torvalds 2835ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28361da177e4SLinus Torvalds locks_init_lock(&file_lock); 28371da177e4SLinus Torvalds switch (lockt->lt_type) { 28381da177e4SLinus Torvalds case NFS4_READ_LT: 28391da177e4SLinus Torvalds case NFS4_READW_LT: 28401da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28411da177e4SLinus Torvalds break; 28421da177e4SLinus Torvalds case NFS4_WRITE_LT: 28431da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28441da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28451da177e4SLinus Torvalds break; 28461da177e4SLinus Torvalds default: 28472fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 28481da177e4SLinus Torvalds status = nfserr_inval; 28491da177e4SLinus Torvalds goto out; 28501da177e4SLinus Torvalds } 28511da177e4SLinus Torvalds 28521da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28531da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28541da177e4SLinus Torvalds if (lockt->lt_stateowner) 28551da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28561da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28571da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2858d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28611da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28621da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28631da177e4SLinus Torvalds else 28641da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28651da177e4SLinus Torvalds 28661da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28671da177e4SLinus Torvalds 2868fd85b817SMarc Eshel /* vfs_test_lock uses the struct file _only_ to resolve the inode. 28691da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 2870fd85b817SMarc Eshel * file may not exist, pass vfs_test_lock a struct file with 28711da177e4SLinus Torvalds * only the dentry:inode set. 28721da177e4SLinus Torvalds */ 28731da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 2874ca364317SJ.Bruce Fields file.f_path.dentry = cstate->current_fh.fh_dentry; 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds status = nfs_ok; 2877fd85b817SMarc Eshel error = vfs_test_lock(&file, &file_lock); 2878fd85b817SMarc Eshel if (error) { 2879fd85b817SMarc Eshel status = nfserrno(error); 2880fd85b817SMarc Eshel goto out; 2881fd85b817SMarc Eshel } 28829d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 28831da177e4SLinus Torvalds status = nfserr_denied; 28849d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 28851da177e4SLinus Torvalds } 28861da177e4SLinus Torvalds out: 28871da177e4SLinus Torvalds nfs4_unlock_state(); 28881da177e4SLinus Torvalds return status; 28891da177e4SLinus Torvalds } 28901da177e4SLinus Torvalds 2891b37ad28bSAl Viro __be32 2892ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2893a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 28941da177e4SLinus Torvalds { 28951da177e4SLinus Torvalds struct nfs4_stateid *stp; 28961da177e4SLinus Torvalds struct file *filp = NULL; 28971da177e4SLinus Torvalds struct file_lock file_lock; 2898b37ad28bSAl Viro __be32 status; 2899b8dd7b9aSAl Viro int err; 29001da177e4SLinus Torvalds 29011da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29021da177e4SLinus Torvalds (long long) locku->lu_offset, 29031da177e4SLinus Torvalds (long long) locku->lu_length); 29041da177e4SLinus Torvalds 29051da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29061da177e4SLinus Torvalds return nfserr_inval; 29071da177e4SLinus Torvalds 29081da177e4SLinus Torvalds nfs4_lock_state(); 29091da177e4SLinus Torvalds 2910ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 29111da177e4SLinus Torvalds locku->lu_seqid, 29121da177e4SLinus Torvalds &locku->lu_stateid, 29131da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 29141da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29151da177e4SLinus Torvalds goto out; 29161da177e4SLinus Torvalds 29171da177e4SLinus Torvalds filp = stp->st_vfs_file; 29181da177e4SLinus Torvalds BUG_ON(!filp); 29191da177e4SLinus Torvalds locks_init_lock(&file_lock); 29201da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29211da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29221da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29231da177e4SLinus Torvalds file_lock.fl_file = filp; 29241da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2925d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29261da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29271da177e4SLinus Torvalds 29281da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29291da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29301da177e4SLinus Torvalds else 29311da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29321da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29331da177e4SLinus Torvalds 29341da177e4SLinus Torvalds /* 29351da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29361da177e4SLinus Torvalds */ 2937fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2938b8dd7b9aSAl Viro if (err) { 2939fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29401da177e4SLinus Torvalds goto out_nfserr; 29411da177e4SLinus Torvalds } 29421da177e4SLinus Torvalds /* 29431da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29441da177e4SLinus Torvalds */ 29451da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29461da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29471da177e4SLinus Torvalds 29481da177e4SLinus Torvalds out: 2949f2327d9aSNeil Brown if (locku->lu_stateowner) { 29501da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2951a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2952f2327d9aSNeil Brown } 29531da177e4SLinus Torvalds nfs4_unlock_state(); 29541da177e4SLinus Torvalds return status; 29551da177e4SLinus Torvalds 29561da177e4SLinus Torvalds out_nfserr: 2957b8dd7b9aSAl Viro status = nfserrno(err); 29581da177e4SLinus Torvalds goto out; 29591da177e4SLinus Torvalds } 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds /* 29621da177e4SLinus Torvalds * returns 29631da177e4SLinus Torvalds * 1: locks held by lockowner 29641da177e4SLinus Torvalds * 0: no locks held by lockowner 29651da177e4SLinus Torvalds */ 29661da177e4SLinus Torvalds static int 29671da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29681da177e4SLinus Torvalds { 29691da177e4SLinus Torvalds struct file_lock **flpp; 29707eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 29711da177e4SLinus Torvalds int status = 0; 29721da177e4SLinus Torvalds 29731da177e4SLinus Torvalds lock_kernel(); 29741da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2975796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29761da177e4SLinus Torvalds status = 1; 29771da177e4SLinus Torvalds goto out; 29781da177e4SLinus Torvalds } 2979796dadfdSJ. Bruce Fields } 29801da177e4SLinus Torvalds out: 29811da177e4SLinus Torvalds unlock_kernel(); 29821da177e4SLinus Torvalds return status; 29831da177e4SLinus Torvalds } 29841da177e4SLinus Torvalds 2985b37ad28bSAl Viro __be32 2986b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 2987b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2988b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 29891da177e4SLinus Torvalds { 29901da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29913e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29923e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29931da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29943e9e3dbeSNeilBrown struct list_head matches; 29953e9e3dbeSNeilBrown int i; 2996b37ad28bSAl Viro __be32 status; 29971da177e4SLinus Torvalds 29981da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29991da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30001da177e4SLinus Torvalds 30011da177e4SLinus Torvalds /* XXX check for lease expiration */ 30021da177e4SLinus Torvalds 30031da177e4SLinus Torvalds status = nfserr_stale_clientid; 3004849823c5SNeil Brown if (STALE_CLIENTID(clid)) 30051da177e4SLinus Torvalds return status; 30061da177e4SLinus Torvalds 30071da177e4SLinus Torvalds nfs4_lock_state(); 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds status = nfserr_locks_held; 30103e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30113e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30123e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30133e9e3dbeSNeilBrown * data structures. */ 30143e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30153e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30163e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 3017599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 30183e9e3dbeSNeilBrown continue; 30193e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3020ea1da636SNeilBrown st_perstateowner) { 30213e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30221da177e4SLinus Torvalds goto out; 30233e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30243e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30253e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30261da177e4SLinus Torvalds } 30273e9e3dbeSNeilBrown } 30283e9e3dbeSNeilBrown } 30293e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30303e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30313e9e3dbeSNeilBrown * have been checked. */ 30321da177e4SLinus Torvalds status = nfs_ok; 30330fa822e4SNeilBrown while (!list_empty(&matches)) { 30340fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30350fa822e4SNeilBrown so_perclient); 30360fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30370fa822e4SNeilBrown * for openowners. */ 30380fa822e4SNeilBrown list_del(&sop->so_perclient); 30393e9e3dbeSNeilBrown release_stateowner(sop); 30401da177e4SLinus Torvalds } 30411da177e4SLinus Torvalds out: 30421da177e4SLinus Torvalds nfs4_unlock_state(); 30431da177e4SLinus Torvalds return status; 30441da177e4SLinus Torvalds } 30451da177e4SLinus Torvalds 30461da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3047a55370a3SNeilBrown alloc_reclaim(void) 30481da177e4SLinus Torvalds { 3049a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds 3052c7b9a459SNeilBrown int 3053c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3054c7b9a459SNeilBrown { 3055c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3056c7b9a459SNeilBrown struct nfs4_client *clp; 3057c7b9a459SNeilBrown 3058c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3059c7b9a459SNeilBrown return clp ? 1 : 0; 3060c7b9a459SNeilBrown } 3061c7b9a459SNeilBrown 30621da177e4SLinus Torvalds /* 30631da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30641da177e4SLinus Torvalds */ 3065190e4fbfSNeilBrown int 3066190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30671da177e4SLinus Torvalds { 30681da177e4SLinus Torvalds unsigned int strhashval; 30691da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30701da177e4SLinus Torvalds 3071a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3072a55370a3SNeilBrown crp = alloc_reclaim(); 30731da177e4SLinus Torvalds if (!crp) 30741da177e4SLinus Torvalds return 0; 3075a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30761da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30771da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3078a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30791da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30801da177e4SLinus Torvalds return 1; 30811da177e4SLinus Torvalds } 30821da177e4SLinus Torvalds 30831da177e4SLinus Torvalds static void 30841da177e4SLinus Torvalds nfs4_release_reclaim(void) 30851da177e4SLinus Torvalds { 30861da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30871da177e4SLinus Torvalds int i; 30881da177e4SLinus Torvalds 30891da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30901da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30911da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30921da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30931da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30941da177e4SLinus Torvalds kfree(crp); 30951da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30961da177e4SLinus Torvalds } 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30991da177e4SLinus Torvalds } 31001da177e4SLinus Torvalds 31011da177e4SLinus Torvalds /* 31021da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3103fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31041da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31051da177e4SLinus Torvalds { 31061da177e4SLinus Torvalds unsigned int strhashval; 31071da177e4SLinus Torvalds struct nfs4_client *clp; 31081da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31091da177e4SLinus Torvalds 31101da177e4SLinus Torvalds 31111da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31121da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31131da177e4SLinus Torvalds if (clp == NULL) 31141da177e4SLinus Torvalds return NULL; 31151da177e4SLinus Torvalds 3116a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3117a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3118a55370a3SNeilBrown clp->cl_recdir); 31191da177e4SLinus Torvalds 31201da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3121a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31221da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3123a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31241da177e4SLinus Torvalds return crp; 31251da177e4SLinus Torvalds } 31261da177e4SLinus Torvalds } 31271da177e4SLinus Torvalds return NULL; 31281da177e4SLinus Torvalds } 31291da177e4SLinus Torvalds 31301da177e4SLinus Torvalds /* 31311da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31321da177e4SLinus Torvalds */ 3133b37ad28bSAl Viro __be32 31341da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31351da177e4SLinus Torvalds { 3136dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds 3139ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31401da177e4SLinus Torvalds 3141e8ff2a84SJ. Bruce Fields int 3142ac4d8ff2SNeilBrown nfs4_state_init(void) 31431da177e4SLinus Torvalds { 3144e8ff2a84SJ. Bruce Fields int i, status; 31451da177e4SLinus Torvalds 3146e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3147e8ff2a84SJ. Bruce Fields if (status) 3148e8ff2a84SJ. Bruce Fields return status; 31491da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31501da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31511da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31521da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31531da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31541da177e4SLinus Torvalds } 31551da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31561da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31571da177e4SLinus Torvalds } 31581da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31591da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31601da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31611da177e4SLinus Torvalds } 31621da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31631da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31641da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31651da177e4SLinus Torvalds } 31661da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31671da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31681da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31711da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31721da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31731da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3174ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3175ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3176ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3177e8ff2a84SJ. Bruce Fields return 0; 3178ac4d8ff2SNeilBrown } 3179ac4d8ff2SNeilBrown 3180190e4fbfSNeilBrown static void 3181190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3182190e4fbfSNeilBrown { 3183190e4fbfSNeilBrown int status; 3184190e4fbfSNeilBrown 31850964a3d3SNeilBrown nfs4_lock_state(); 31860964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3187190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31880964a3d3SNeilBrown nfs4_unlock_state(); 3189190e4fbfSNeilBrown if (status) 3190190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3191190e4fbfSNeilBrown } 3192190e4fbfSNeilBrown 31939a8db97eSMarc Eshel unsigned long 31949a8db97eSMarc Eshel get_nfs4_grace_period(void) 31959a8db97eSMarc Eshel { 31969a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 31979a8db97eSMarc Eshel } 31989a8db97eSMarc Eshel 3199c2f1a551SMeelap Shah /* 3200c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3201c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3202c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3203c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3204c2f1a551SMeelap Shah * 3205c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3206c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3207c2f1a551SMeelap Shah */ 3208c2f1a551SMeelap Shah static void 3209c2f1a551SMeelap Shah set_max_delegations(void) 3210c2f1a551SMeelap Shah { 3211c2f1a551SMeelap Shah /* 3212c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3213c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3214c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3215c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3216c2f1a551SMeelap Shah */ 3217c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3218c2f1a551SMeelap Shah } 3219c2f1a551SMeelap Shah 3220ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3221ac4d8ff2SNeilBrown 3222ac4d8ff2SNeilBrown static void 3223ac4d8ff2SNeilBrown __nfs4_state_start(void) 3224ac4d8ff2SNeilBrown { 32259a8db97eSMarc Eshel unsigned long grace_time; 3226ac4d8ff2SNeilBrown 32271da177e4SLinus Torvalds boot_time = get_seconds(); 32289a8db97eSMarc Eshel grace_time = get_nfs_grace_period(); 3229d99a05adSNeilBrown lease_time = user_lease_time; 3230a76b4319SNeilBrown in_grace = 1; 32319a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32329a8db97eSMarc Eshel grace_time/HZ); 323358da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32349a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3235c2f1a551SMeelap Shah set_max_delegations(); 32361da177e4SLinus Torvalds } 32371da177e4SLinus Torvalds 3238e8ff2a84SJ. Bruce Fields void 323976a3550eSNeilBrown nfs4_state_start(void) 32401da177e4SLinus Torvalds { 32411da177e4SLinus Torvalds if (nfs4_init) 3242e8ff2a84SJ. Bruce Fields return; 3243190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 324476a3550eSNeilBrown __nfs4_state_start(); 32451da177e4SLinus Torvalds nfs4_init = 1; 3246e8ff2a84SJ. Bruce Fields return; 32471da177e4SLinus Torvalds } 32481da177e4SLinus Torvalds 32491da177e4SLinus Torvalds int 32501da177e4SLinus Torvalds nfs4_in_grace(void) 32511da177e4SLinus Torvalds { 3252a76b4319SNeilBrown return in_grace; 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds 32551da177e4SLinus Torvalds time_t 32561da177e4SLinus Torvalds nfs4_lease_time(void) 32571da177e4SLinus Torvalds { 32581da177e4SLinus Torvalds return lease_time; 32591da177e4SLinus Torvalds } 32601da177e4SLinus Torvalds 32611da177e4SLinus Torvalds static void 32621da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32631da177e4SLinus Torvalds { 32641da177e4SLinus Torvalds int i; 32651da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32661da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32671da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32681da177e4SLinus Torvalds 32691da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32701da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32711da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32721da177e4SLinus Torvalds expire_client(clp); 32731da177e4SLinus Torvalds } 32741da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32751da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32761da177e4SLinus Torvalds expire_client(clp); 32771da177e4SLinus Torvalds } 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32801da177e4SLinus Torvalds spin_lock(&recall_lock); 32811da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32821da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32831da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32841da177e4SLinus Torvalds } 32851da177e4SLinus Torvalds spin_unlock(&recall_lock); 32861da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32871da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32881da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32891da177e4SLinus Torvalds unhash_delegation(dp); 32901da177e4SLinus Torvalds } 32911da177e4SLinus Torvalds 3292190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32931da177e4SLinus Torvalds nfs4_init = 0; 32941da177e4SLinus Torvalds } 32951da177e4SLinus Torvalds 32961da177e4SLinus Torvalds void 32971da177e4SLinus Torvalds nfs4_state_shutdown(void) 32981da177e4SLinus Torvalds { 32995e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 33005e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 33011da177e4SLinus Torvalds nfs4_lock_state(); 33021da177e4SLinus Torvalds nfs4_release_reclaim(); 33031da177e4SLinus Torvalds __nfs4_state_shutdown(); 33041da177e4SLinus Torvalds nfs4_unlock_state(); 33051da177e4SLinus Torvalds } 33061da177e4SLinus Torvalds 33070964a3d3SNeilBrown static void 33080964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33090964a3d3SNeilBrown { 33100964a3d3SNeilBrown nfs4_lock_state(); 33110964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33120964a3d3SNeilBrown nfs4_unlock_state(); 33130964a3d3SNeilBrown } 33140964a3d3SNeilBrown 33150964a3d3SNeilBrown /* 33160964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33170964a3d3SNeilBrown */ 33180964a3d3SNeilBrown int 33190964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33200964a3d3SNeilBrown { 33210964a3d3SNeilBrown int status; 33220964a3d3SNeilBrown struct nameidata nd; 33230964a3d3SNeilBrown 33240964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 33250964a3d3SNeilBrown if (status) 33260964a3d3SNeilBrown return status; 33270964a3d3SNeilBrown status = -ENOTDIR; 33280964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 33290964a3d3SNeilBrown nfs4_set_recdir(recdir); 33300964a3d3SNeilBrown status = 0; 33310964a3d3SNeilBrown } 33320964a3d3SNeilBrown path_release(&nd); 33330964a3d3SNeilBrown return status; 33340964a3d3SNeilBrown } 33350964a3d3SNeilBrown 33361da177e4SLinus Torvalds /* 33371da177e4SLinus Torvalds * Called when leasetime is changed. 33381da177e4SLinus Torvalds * 3339d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3340d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3341d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3342d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3343d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33441da177e4SLinus Torvalds */ 33451da177e4SLinus Torvalds void 33461da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33471da177e4SLinus Torvalds { 3348d99a05adSNeilBrown lock_kernel(); 3349d99a05adSNeilBrown user_lease_time = leasetime; 3350d99a05adSNeilBrown unlock_kernel(); 33511da177e4SLinus Torvalds } 3352