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 3611da177e4SLinus Torvalds static inline void 3621da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3631da177e4SLinus Torvalds { 3641da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3651da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3661da177e4SLinus Torvalds kfree(clp->cl_name.data); 3671da177e4SLinus Torvalds kfree(clp); 3681da177e4SLinus Torvalds } 3691da177e4SLinus Torvalds 3701da177e4SLinus Torvalds void 3711da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3721da177e4SLinus Torvalds { 3731da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3741da177e4SLinus Torvalds free_client(clp); 3751da177e4SLinus Torvalds } 3761da177e4SLinus Torvalds 3771da177e4SLinus Torvalds static void 3784e2fd495SNeilBrown shutdown_callback_client(struct nfs4_client *clp) 3794e2fd495SNeilBrown { 3804e2fd495SNeilBrown struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3814e2fd495SNeilBrown 3824e2fd495SNeilBrown /* shutdown rpc client, ending any outstanding recall rpcs */ 3834e2fd495SNeilBrown if (clnt) { 3844e2fd495SNeilBrown clp->cl_callback.cb_client = NULL; 3854e2fd495SNeilBrown rpc_shutdown_client(clnt); 3864e2fd495SNeilBrown } 3874e2fd495SNeilBrown } 3884e2fd495SNeilBrown 3894e2fd495SNeilBrown static void 3901da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3911da177e4SLinus Torvalds { 3921da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3931da177e4SLinus Torvalds struct nfs4_delegation *dp; 3941da177e4SLinus Torvalds struct list_head reaplist; 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3971da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3981da177e4SLinus Torvalds 3994e2fd495SNeilBrown shutdown_callback_client(clp); 4001da177e4SLinus Torvalds 4011da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4021da177e4SLinus Torvalds spin_lock(&recall_lock); 403ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 404ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4051da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4061da177e4SLinus Torvalds dp->dl_flock); 407ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4081da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds spin_unlock(&recall_lock); 4111da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4121da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4131da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4141da177e4SLinus Torvalds unhash_delegation(dp); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4171da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4181da177e4SLinus Torvalds list_del(&clp->cl_lru); 419ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 420ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4211da177e4SLinus Torvalds release_stateowner(sop); 4221da177e4SLinus Torvalds } 4231da177e4SLinus Torvalds put_nfs4_client(clp); 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds static struct nfs4_client * 427a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 4281da177e4SLinus Torvalds struct nfs4_client *clp; 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 4311da177e4SLinus Torvalds goto out; 432a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4331da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4341da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4351da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4361da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 437ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 438ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4391da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4401da177e4SLinus Torvalds out: 4411da177e4SLinus Torvalds return clp; 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds static void 4451da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 4461da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds static void 4501da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4511da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4521da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4531da177e4SLinus Torvalds } 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds static void 4561da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4571da177e4SLinus Torvalds 4581da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4591da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4601da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4611da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 464a55370a3SNeilBrown static inline int 465a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 466a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds static int 4701da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4711da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4721da177e4SLinus Torvalds } 4731da177e4SLinus Torvalds 4741da177e4SLinus Torvalds static int 4751da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4761da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4771da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4781da177e4SLinus Torvalds } 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds /* XXX what about NGROUP */ 4811da177e4SLinus Torvalds static int 4821da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4831da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4841da177e4SLinus Torvalds 4851da177e4SLinus Torvalds } 4861da177e4SLinus Torvalds 4871da177e4SLinus Torvalds static void 4881da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4891da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4901da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4911da177e4SLinus Torvalds } 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds static void 4941da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4951da177e4SLinus Torvalds struct timespec tv; 4961da177e4SLinus Torvalds u32 * p; 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds tv = CURRENT_TIME; 4991da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 5001da177e4SLinus Torvalds *p++ = tv.tv_sec; 5011da177e4SLinus Torvalds *p++ = tv.tv_nsec; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds static int 5051da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 5061da177e4SLinus Torvalds 5071da177e4SLinus Torvalds if (name.len == 0) 5081da177e4SLinus Torvalds return 0; 5091da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5101da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 5111da177e4SLinus Torvalds return 0; 5121da177e4SLinus Torvalds } 5131da177e4SLinus Torvalds return 1; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds 516fd39ca9aSNeilBrown static void 5171da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5181da177e4SLinus Torvalds { 5191da177e4SLinus Torvalds unsigned int idhashval; 5201da177e4SLinus Torvalds 5211da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 5221da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5231da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 5241da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 5251da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5261da177e4SLinus Torvalds } 5271da177e4SLinus Torvalds 528fd39ca9aSNeilBrown static void 5291da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 5301da177e4SLinus Torvalds { 5311da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5321da177e4SLinus Torvalds unsigned int strhashval; 5331da177e4SLinus Torvalds 5341da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 5351da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 536f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 537a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 5381da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 5391da177e4SLinus Torvalds renew_client(clp); 5401da177e4SLinus Torvalds } 5411da177e4SLinus Torvalds 5421da177e4SLinus Torvalds static struct nfs4_client * 5431da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5441da177e4SLinus Torvalds { 5451da177e4SLinus Torvalds struct nfs4_client *clp; 5461da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5471da177e4SLinus Torvalds 5481da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 5491da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5501da177e4SLinus Torvalds return clp; 5511da177e4SLinus Torvalds } 5521da177e4SLinus Torvalds return NULL; 5531da177e4SLinus Torvalds } 5541da177e4SLinus Torvalds 5551da177e4SLinus Torvalds static struct nfs4_client * 5561da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5571da177e4SLinus Torvalds { 5581da177e4SLinus Torvalds struct nfs4_client *clp; 5591da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5601da177e4SLinus Torvalds 5611da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5621da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5631da177e4SLinus Torvalds return clp; 5641da177e4SLinus Torvalds } 5651da177e4SLinus Torvalds return NULL; 5661da177e4SLinus Torvalds } 5671da177e4SLinus Torvalds 56828ce6054SNeilBrown static struct nfs4_client * 56928ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 57028ce6054SNeilBrown { 57128ce6054SNeilBrown struct nfs4_client *clp; 57228ce6054SNeilBrown 57328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 57428ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 57528ce6054SNeilBrown return clp; 57628ce6054SNeilBrown } 57728ce6054SNeilBrown return NULL; 57828ce6054SNeilBrown } 57928ce6054SNeilBrown 58028ce6054SNeilBrown static struct nfs4_client * 58128ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 58228ce6054SNeilBrown { 58328ce6054SNeilBrown struct nfs4_client *clp; 58428ce6054SNeilBrown 58528ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 58628ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 58728ce6054SNeilBrown return clp; 58828ce6054SNeilBrown } 58928ce6054SNeilBrown return NULL; 59028ce6054SNeilBrown } 59128ce6054SNeilBrown 5921da177e4SLinus Torvalds /* a helper function for parse_callback */ 5931da177e4SLinus Torvalds static int 5941da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5951da177e4SLinus Torvalds { 5961da177e4SLinus Torvalds unsigned int len = *lenp; 5971da177e4SLinus Torvalds char *p = *addrp; 5981da177e4SLinus Torvalds int n = -1; 5991da177e4SLinus Torvalds char c; 6001da177e4SLinus Torvalds 6011da177e4SLinus Torvalds for (;;) { 6021da177e4SLinus Torvalds if (!len) 6031da177e4SLinus Torvalds break; 6041da177e4SLinus Torvalds len--; 6051da177e4SLinus Torvalds c = *p++; 6061da177e4SLinus Torvalds if (c == '.') 6071da177e4SLinus Torvalds break; 6081da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6091da177e4SLinus Torvalds n = -1; 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds } 6121da177e4SLinus Torvalds if (n < 0) 6131da177e4SLinus Torvalds n = 0; 6141da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6151da177e4SLinus Torvalds if (n > 255) { 6161da177e4SLinus Torvalds n = -1; 6171da177e4SLinus Torvalds break; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds *lenp = len; 6211da177e4SLinus Torvalds *addrp = p; 6221da177e4SLinus Torvalds return n; 6231da177e4SLinus Torvalds } 6241da177e4SLinus Torvalds 6251da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 626fd39ca9aSNeilBrown static int 6271da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 6281da177e4SLinus Torvalds { 6291da177e4SLinus Torvalds int temp = 0; 6301da177e4SLinus Torvalds u32 cbaddr = 0; 6311da177e4SLinus Torvalds u16 cbport = 0; 6321da177e4SLinus Torvalds u32 addrlen = addr_len; 6331da177e4SLinus Torvalds char *addr = addr_val; 6341da177e4SLinus Torvalds int i, shift; 6351da177e4SLinus Torvalds 6361da177e4SLinus Torvalds /* ipaddress */ 6371da177e4SLinus Torvalds shift = 24; 6381da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 6391da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6401da177e4SLinus Torvalds return 0; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds cbaddr |= (temp << shift); 6431da177e4SLinus Torvalds if (shift > 0) 6441da177e4SLinus Torvalds shift -= 8; 6451da177e4SLinus Torvalds } 6461da177e4SLinus Torvalds *cbaddrp = cbaddr; 6471da177e4SLinus Torvalds 6481da177e4SLinus Torvalds /* port */ 6491da177e4SLinus Torvalds shift = 8; 6501da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6511da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6521da177e4SLinus Torvalds return 0; 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds cbport |= (temp << shift); 6551da177e4SLinus Torvalds if (shift > 0) 6561da177e4SLinus Torvalds shift -= 8; 6571da177e4SLinus Torvalds } 6581da177e4SLinus Torvalds *cbportp = cbport; 6591da177e4SLinus Torvalds return 1; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds 662fd39ca9aSNeilBrown static void 6631da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6641da177e4SLinus Torvalds { 6651da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6681da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6691da177e4SLinus Torvalds goto out_err; 6701da177e4SLinus Torvalds 6711da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6721da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6731da177e4SLinus Torvalds goto out_err; 6741da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6751da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6761da177e4SLinus Torvalds return; 6771da177e4SLinus Torvalds out_err: 678849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6791da177e4SLinus Torvalds "will not receive delegations\n", 6801da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds return; 6831da177e4SLinus Torvalds } 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds /* 6861da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6871da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6881da177e4SLinus Torvalds * CASE0 - CASE4 below. 6891da177e4SLinus Torvalds * 6901da177e4SLinus Torvalds * NOTES: 6911da177e4SLinus Torvalds * callback information will be processed in a future patch 6921da177e4SLinus Torvalds * 6931da177e4SLinus Torvalds * an unconfirmed record is added when: 6941da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6951da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6961da177e4SLinus Torvalds * verifier, and clientid. 6971da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6981da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6991da177e4SLinus Torvalds * name and principal 7001da177e4SLinus Torvalds * 7011da177e4SLinus Torvalds * an unconfirmed record is replaced when: 7021da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 7031da177e4SLinus Torvalds * and an unconfirmed record is found with matching 7041da177e4SLinus Torvalds * name, principal, and with clientid and 7051da177e4SLinus Torvalds * confirm that does not match the confirmed record. 7061da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 7071da177e4SLinus Torvalds * principal. there is an unconfirmed record with 7081da177e4SLinus Torvalds * matching name, principal. 7091da177e4SLinus Torvalds * 7101da177e4SLinus Torvalds * an unconfirmed record is deleted when: 7111da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 7121da177e4SLinus Torvalds * and confirmed clientid. 7131da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 7141da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 7151da177e4SLinus Torvalds * as described above. 7161da177e4SLinus Torvalds * 7171da177e4SLinus Torvalds */ 718b37ad28bSAl Viro __be32 719b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 720b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 7211da177e4SLinus Torvalds { 72227459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 7231da177e4SLinus Torvalds struct xdr_netobj clname = { 7241da177e4SLinus Torvalds .len = setclid->se_namelen, 7251da177e4SLinus Torvalds .data = setclid->se_name, 7261da177e4SLinus Torvalds }; 7271da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7281da177e4SLinus Torvalds unsigned int strhashval; 72928ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 730b37ad28bSAl Viro __be32 status; 731a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7321da177e4SLinus Torvalds 7331da177e4SLinus Torvalds if (!check_name(clname)) 73473aea4ecSNeil Brown return nfserr_inval; 7351da177e4SLinus Torvalds 736a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 737a55370a3SNeilBrown if (status) 73873aea4ecSNeil Brown return status; 739a55370a3SNeilBrown 7401da177e4SLinus Torvalds /* 7411da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7421da177e4SLinus Torvalds * We get here on a DRC miss. 7431da177e4SLinus Torvalds */ 7441da177e4SLinus Torvalds 745a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7461da177e4SLinus Torvalds 7471da177e4SLinus Torvalds nfs4_lock_state(); 74828ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 74928ce6054SNeilBrown if (conf) { 7501da177e4SLinus Torvalds /* 7511da177e4SLinus Torvalds * CASE 0: 7521da177e4SLinus Torvalds * clname match, confirmed, different principal 7531da177e4SLinus Torvalds * or different ip_address 7541da177e4SLinus Torvalds */ 7551da177e4SLinus Torvalds status = nfserr_clid_inuse; 75628ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 75727459f09SChuck Lever || conf->cl_addr != sin->sin_addr.s_addr) { 75821315eddSBruce Fields dprintk("NFSD: setclientid: string in use by client" 75921315eddSBruce Fields "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); 7601da177e4SLinus Torvalds goto out; 7611da177e4SLinus Torvalds } 7621da177e4SLinus Torvalds } 76328ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7641da177e4SLinus Torvalds status = nfserr_resource; 7651da177e4SLinus Torvalds if (!conf) { 7661da177e4SLinus Torvalds /* 7671da177e4SLinus Torvalds * CASE 4: 7681da177e4SLinus Torvalds * placed first, because it is the normal case. 7691da177e4SLinus Torvalds */ 7701da177e4SLinus Torvalds if (unconf) 7711da177e4SLinus Torvalds expire_client(unconf); 772a55370a3SNeilBrown new = create_client(clname, dname); 773a55370a3SNeilBrown if (new == NULL) 7741da177e4SLinus Torvalds goto out; 7751da177e4SLinus Torvalds copy_verf(new, &clverifier); 77627459f09SChuck Lever new->cl_addr = sin->sin_addr.s_addr; 7771da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7781da177e4SLinus Torvalds gen_clid(new); 7791da177e4SLinus Torvalds gen_confirm(new); 7801da177e4SLinus Torvalds gen_callback(new, setclid); 7811da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7821da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7831da177e4SLinus Torvalds /* 7841da177e4SLinus Torvalds * CASE 1: 7851da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7861da177e4SLinus Torvalds * verifier match: probable callback update 7871da177e4SLinus Torvalds * 7881da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7891da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7901da177e4SLinus Torvalds * 7911da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7921da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7931da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7941da177e4SLinus Torvalds * new cl_confirm 7951da177e4SLinus Torvalds */ 79631f4a6c1SNeilBrown if (unconf) { 79731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 79831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 79931f4a6c1SNeilBrown * This has the advantage that there is at most 80031f4a6c1SNeilBrown * one {*x***} in either list at any time. 80131f4a6c1SNeilBrown */ 8021da177e4SLinus Torvalds expire_client(unconf); 8031da177e4SLinus Torvalds } 804a55370a3SNeilBrown new = create_client(clname, dname); 805a55370a3SNeilBrown if (new == NULL) 8061da177e4SLinus Torvalds goto out; 8071da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 80827459f09SChuck Lever new->cl_addr = sin->sin_addr.s_addr; 8091da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8101da177e4SLinus Torvalds copy_clid(new, conf); 8111da177e4SLinus Torvalds gen_confirm(new); 8121da177e4SLinus Torvalds gen_callback(new, setclid); 8131da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 8141da177e4SLinus Torvalds } else if (!unconf) { 8151da177e4SLinus Torvalds /* 8161da177e4SLinus Torvalds * CASE 2: 8171da177e4SLinus Torvalds * clname match, confirmed, principal match 8181da177e4SLinus Torvalds * verfier does not match 8191da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 8201da177e4SLinus Torvalds * using input clverifier, clname, and callback info 8211da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 8221da177e4SLinus Torvalds */ 823a55370a3SNeilBrown new = create_client(clname, dname); 824a55370a3SNeilBrown if (new == NULL) 8251da177e4SLinus Torvalds goto out; 8261da177e4SLinus Torvalds copy_verf(new,&clverifier); 82727459f09SChuck Lever new->cl_addr = sin->sin_addr.s_addr; 8281da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8291da177e4SLinus Torvalds gen_clid(new); 8301da177e4SLinus Torvalds gen_confirm(new); 8311da177e4SLinus Torvalds gen_callback(new, setclid); 8321da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8331da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 8341da177e4SLinus Torvalds /* 8351da177e4SLinus Torvalds * CASE3: 8361da177e4SLinus Torvalds * confirmed found (name, principal match) 8371da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 8381da177e4SLinus Torvalds * 8391da177e4SLinus Torvalds * unconfirmed found (name match) 8401da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 8411da177e4SLinus Torvalds * 8421da177e4SLinus Torvalds * remove unconfirmed. 8431da177e4SLinus Torvalds * 8441da177e4SLinus Torvalds * create an unconfirmed nfs4_client 8451da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 8461da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 8471da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 8481da177e4SLinus Torvalds */ 8491da177e4SLinus Torvalds expire_client(unconf); 850a55370a3SNeilBrown new = create_client(clname, dname); 851a55370a3SNeilBrown if (new == NULL) 8521da177e4SLinus Torvalds goto out; 8531da177e4SLinus Torvalds copy_verf(new,&clverifier); 85427459f09SChuck Lever new->cl_addr = sin->sin_addr.s_addr; 8551da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8561da177e4SLinus Torvalds gen_clid(new); 8571da177e4SLinus Torvalds gen_confirm(new); 8581da177e4SLinus Torvalds gen_callback(new, setclid); 8591da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8601da177e4SLinus Torvalds } else { 8611da177e4SLinus Torvalds /* No cases hit !!! */ 8621da177e4SLinus Torvalds status = nfserr_inval; 8631da177e4SLinus Torvalds goto out; 8641da177e4SLinus Torvalds 8651da177e4SLinus Torvalds } 8661da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8671da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8681da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8691da177e4SLinus Torvalds status = nfs_ok; 8701da177e4SLinus Torvalds out: 8711da177e4SLinus Torvalds nfs4_unlock_state(); 8721da177e4SLinus Torvalds return status; 8731da177e4SLinus Torvalds } 8741da177e4SLinus Torvalds 8751da177e4SLinus Torvalds 8761da177e4SLinus Torvalds /* 8771da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8781da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8791da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8801da177e4SLinus Torvalds * 8811da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8821da177e4SLinus Torvalds */ 883b37ad28bSAl Viro __be32 884b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 885b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 886b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 8871da177e4SLinus Torvalds { 88827459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 88921ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8901da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8911da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 892b37ad28bSAl Viro __be32 status; 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8951da177e4SLinus Torvalds return nfserr_stale_clientid; 8961da177e4SLinus Torvalds /* 8971da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8981da177e4SLinus Torvalds * We get here on a DRC miss. 8991da177e4SLinus Torvalds */ 9001da177e4SLinus Torvalds 9011da177e4SLinus Torvalds nfs4_lock_state(); 90221ab45a4SNeilBrown 90321ab45a4SNeilBrown conf = find_confirmed_client(clid); 90421ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 90521ab45a4SNeilBrown 90622de4d83SNeilBrown status = nfserr_clid_inuse; 90727459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 9081da177e4SLinus Torvalds goto out; 90927459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 9101da177e4SLinus Torvalds goto out; 91121ab45a4SNeilBrown 9121da177e4SLinus Torvalds if ((conf && unconf) && 9131da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 9141da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 915a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 9161da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 9177c79f737SNeilBrown /* CASE 1: 9187c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 9197c79f737SNeilBrown * conf record that matches input clientid. 9207c79f737SNeilBrown * conf and unconf records match names, verifiers 9217c79f737SNeilBrown */ 9221da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 9231da177e4SLinus Torvalds status = nfserr_clid_inuse; 9241da177e4SLinus Torvalds else { 9251a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9261a69c179SNeilBrown * change request correctly. */ 927cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 92821ab45a4SNeilBrown gen_confirm(conf); 92946309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9301a69c179SNeilBrown expire_client(unconf); 9311da177e4SLinus Torvalds status = nfs_ok; 9321a69c179SNeilBrown 9331da177e4SLinus Torvalds } 9347c79f737SNeilBrown } else if ((conf && !unconf) || 9351da177e4SLinus Torvalds ((conf && unconf) && 9361da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 937a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 9387c79f737SNeilBrown /* CASE 2: 9397c79f737SNeilBrown * conf record that matches input clientid. 9407c79f737SNeilBrown * if unconf record matches input clientid, then 9417c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 9427c79f737SNeilBrown * conf record. 9437c79f737SNeilBrown */ 94421ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 9451da177e4SLinus Torvalds status = nfserr_clid_inuse; 94621ab45a4SNeilBrown else 9471da177e4SLinus Torvalds status = nfs_ok; 9487c79f737SNeilBrown } else if (!conf && unconf 9497c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 9501da177e4SLinus Torvalds /* CASE 3: 9511da177e4SLinus Torvalds * conf record not found. 9521da177e4SLinus Torvalds * unconf record found. 9531da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9541da177e4SLinus Torvalds */ 9551da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9561da177e4SLinus Torvalds status = nfserr_clid_inuse; 9571da177e4SLinus Torvalds } else { 9581a69c179SNeilBrown unsigned int hash = 9591a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9601a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9611a69c179SNeilBrown hash); 9621a69c179SNeilBrown if (conf) { 963c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9641a69c179SNeilBrown expire_client(conf); 9651a69c179SNeilBrown } 9661da177e4SLinus Torvalds move_to_confirmed(unconf); 96721ab45a4SNeilBrown conf = unconf; 9681a69c179SNeilBrown status = nfs_ok; 9691da177e4SLinus Torvalds } 9707c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9717c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9727c79f737SNeilBrown &confirm)))) { 9731da177e4SLinus Torvalds /* CASE 4: 9747c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9751da177e4SLinus Torvalds * match input confirm. 9767c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9771da177e4SLinus Torvalds * does not match input confirm. 9781da177e4SLinus Torvalds */ 9791da177e4SLinus Torvalds status = nfserr_stale_clientid; 9807c79f737SNeilBrown } else { 9811da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 98222de4d83SNeilBrown status = nfserr_clid_inuse; 98308e8987cSNeilBrown } 9841da177e4SLinus Torvalds out: 9851da177e4SLinus Torvalds if (!status) 98621ab45a4SNeilBrown nfsd4_probe_callback(conf); 9871da177e4SLinus Torvalds nfs4_unlock_state(); 9881da177e4SLinus Torvalds return status; 9891da177e4SLinus Torvalds } 9901da177e4SLinus Torvalds 9911da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9921da177e4SLinus Torvalds static inline struct nfs4_file * 9931da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds struct nfs4_file *fp; 9961da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9971da177e4SLinus Torvalds 998e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 999e60d4398SNeilBrown if (fp) { 100013cd2184SNeilBrown kref_init(&fp->fi_ref); 10011da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 10028beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 10038beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 10041da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 10051da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 10061da177e4SLinus Torvalds fp->fi_id = current_fileid++; 100747f9940cSMeelap Shah fp->fi_had_conflict = false; 10081da177e4SLinus Torvalds return fp; 10091da177e4SLinus Torvalds } 10101da177e4SLinus Torvalds return NULL; 10111da177e4SLinus Torvalds } 10121da177e4SLinus Torvalds 10131da177e4SLinus Torvalds static void 1014e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 1015e60d4398SNeilBrown { 1016e60d4398SNeilBrown if (*slab == NULL) 1017e60d4398SNeilBrown return; 10181a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1019e60d4398SNeilBrown *slab = NULL; 1020e60d4398SNeilBrown } 1021e60d4398SNeilBrown 1022e60d4398SNeilBrown static void 1023e60d4398SNeilBrown nfsd4_free_slabs(void) 1024e60d4398SNeilBrown { 1025e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1026e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10275ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10285b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1029e60d4398SNeilBrown } 10301da177e4SLinus Torvalds 10311da177e4SLinus Torvalds static int 10321da177e4SLinus Torvalds nfsd4_init_slabs(void) 10331da177e4SLinus Torvalds { 10341da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 103520c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 1036e60d4398SNeilBrown if (stateowner_slab == NULL) 1037e60d4398SNeilBrown goto out_nomem; 1038e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 103920c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 1040e60d4398SNeilBrown if (file_slab == NULL) 1041e60d4398SNeilBrown goto out_nomem; 10425ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 104320c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 10445ac049acSNeilBrown if (stateid_slab == NULL) 10455ac049acSNeilBrown goto out_nomem; 10465b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 104720c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 10485b2d21c1SNeilBrown if (deleg_slab == NULL) 10495b2d21c1SNeilBrown goto out_nomem; 1050e60d4398SNeilBrown return 0; 1051e60d4398SNeilBrown out_nomem: 1052e60d4398SNeilBrown nfsd4_free_slabs(); 10531da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10541da177e4SLinus Torvalds return -ENOMEM; 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds void 10581da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10591da177e4SLinus Torvalds { 10601da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10611da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10621da177e4SLinus Torvalds kfree(sop->so_owner.data); 10631da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10641da177e4SLinus Torvalds } 10651da177e4SLinus Torvalds 10661da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10671da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10681da177e4SLinus Torvalds { 10691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10701da177e4SLinus Torvalds 10711da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10721da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10731da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10741da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10751da177e4SLinus Torvalds kref_init(&sop->so_ref); 10761da177e4SLinus Torvalds return sop; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10791da177e4SLinus Torvalds } 10801da177e4SLinus Torvalds return NULL; 10811da177e4SLinus Torvalds } 10821da177e4SLinus Torvalds 10831da177e4SLinus Torvalds static struct nfs4_stateowner * 10841da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10851da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10861da177e4SLinus Torvalds struct nfs4_replay *rp; 10871da177e4SLinus Torvalds unsigned int idhashval; 10881da177e4SLinus Torvalds 10891da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10901da177e4SLinus Torvalds return NULL; 10911da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10921da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10931da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10941da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1095ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1096ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10971da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10981da177e4SLinus Torvalds sop->so_time = 0; 10991da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 11001da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1101ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 11021da177e4SLinus Torvalds sop->so_is_open_owner = 1; 11031da177e4SLinus Torvalds sop->so_id = current_ownerid++; 11041da177e4SLinus Torvalds sop->so_client = clp; 11051da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 11061da177e4SLinus Torvalds sop->so_confirmed = 0; 11071da177e4SLinus Torvalds rp = &sop->so_replay; 1108de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11091da177e4SLinus Torvalds rp->rp_buflen = 0; 11101da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11111da177e4SLinus Torvalds return sop; 11121da177e4SLinus Torvalds } 11131da177e4SLinus Torvalds 11141da177e4SLinus Torvalds static void 11151da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11161da177e4SLinus Torvalds { 11171da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11181da177e4SLinus Torvalds 1119ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1120ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1121ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1122ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11231da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11241da177e4SLinus Torvalds release_stateowner(lock_sop); 11251da177e4SLinus Torvalds } 11261da177e4SLinus Torvalds } 11271da177e4SLinus Torvalds 11281da177e4SLinus Torvalds static void 11291da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11301da177e4SLinus Torvalds { 11311da177e4SLinus Torvalds struct nfs4_stateid *stp; 11321da177e4SLinus Torvalds 11331da177e4SLinus Torvalds list_del(&sop->so_idhash); 11341da177e4SLinus Torvalds list_del(&sop->so_strhash); 11356fa305deSNeilBrown if (sop->so_is_open_owner) 11361da177e4SLinus Torvalds list_del(&sop->so_perclient); 1137ea1da636SNeilBrown list_del(&sop->so_perstateid); 1138ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1139ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1140ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11411da177e4SLinus Torvalds if (sop->so_is_open_owner) 11421da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11431da177e4SLinus Torvalds else 11441da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds static void 11491da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11501da177e4SLinus Torvalds { 11511da177e4SLinus Torvalds unhash_stateowner(sop); 11521da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11531da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11541da177e4SLinus Torvalds } 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds static inline void 11571da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11581da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11591da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11601da177e4SLinus Torvalds 11611da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1162ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1163ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11641da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11651da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1166ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11678beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11681da177e4SLinus Torvalds stp->st_stateowner = sop; 116913cd2184SNeilBrown get_nfs4_file(fp); 11701da177e4SLinus Torvalds stp->st_file = fp; 11711da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11721da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11731da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11741da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11751da177e4SLinus Torvalds stp->st_access_bmap = 0; 11761da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11771da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11781da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11794c4cd222SNeilBrown stp->st_openstp = NULL; 11801da177e4SLinus Torvalds } 11811da177e4SLinus Torvalds 11821da177e4SLinus Torvalds static void 11831da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11841da177e4SLinus Torvalds { 11851da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11861da177e4SLinus Torvalds 11871da177e4SLinus Torvalds list_del(&stp->st_hash); 11881da177e4SLinus Torvalds list_del(&stp->st_perfile); 1189ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11901da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11911da177e4SLinus Torvalds release_stateid_lockowners(stp); 11921da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11931da177e4SLinus Torvalds nfsd_close(filp); 11941da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11951da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 119613cd2184SNeilBrown put_nfs4_file(stp->st_file); 11975ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11981da177e4SLinus Torvalds } 11991da177e4SLinus Torvalds 1200fd39ca9aSNeilBrown static void 12011da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 12021da177e4SLinus Torvalds { 12031da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 12041da177e4SLinus Torvalds 1205358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 12061da177e4SLinus Torvalds sop->so_time = get_seconds(); 12071da177e4SLinus Torvalds } 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds static int 12101da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 12111da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 12121da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 12131da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds 12161da177e4SLinus Torvalds static struct nfs4_stateowner * 12171da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12181da177e4SLinus Torvalds { 12191da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12201da177e4SLinus Torvalds 12211da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12221da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12231da177e4SLinus Torvalds return so; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds return NULL; 12261da177e4SLinus Torvalds } 12271da177e4SLinus Torvalds 12281da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12291da177e4SLinus Torvalds static struct nfs4_file * 12301da177e4SLinus Torvalds find_file(struct inode *ino) 12311da177e4SLinus Torvalds { 12321da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12331da177e4SLinus Torvalds struct nfs4_file *fp; 12341da177e4SLinus Torvalds 12351da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 123613cd2184SNeilBrown if (fp->fi_inode == ino) { 123713cd2184SNeilBrown get_nfs4_file(fp); 12381da177e4SLinus Torvalds return fp; 12391da177e4SLinus Torvalds } 124013cd2184SNeilBrown } 12411da177e4SLinus Torvalds return NULL; 12421da177e4SLinus Torvalds } 12431da177e4SLinus Torvalds 1244ba5a6a19SJ. Bruce Fields static int access_valid(u32 x) 1245ba5a6a19SJ. Bruce Fields { 1246ba5a6a19SJ. Bruce Fields return (x > 0 && x < 4); 1247ba5a6a19SJ. Bruce Fields } 1248ba5a6a19SJ. Bruce Fields 1249ba5a6a19SJ. Bruce Fields static int deny_valid(u32 x) 1250ba5a6a19SJ. Bruce Fields { 1251ba5a6a19SJ. Bruce Fields return (x >= 0 && x < 5); 1252ba5a6a19SJ. Bruce Fields } 12531da177e4SLinus Torvalds 1254fd39ca9aSNeilBrown static void 12551da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12561da177e4SLinus Torvalds int i; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds *access = 0; 12591da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12601da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12611da177e4SLinus Torvalds *access |= i; 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 1265fd39ca9aSNeilBrown static void 12661da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12671da177e4SLinus Torvalds int i; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds *deny = 0; 12701da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12711da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12721da177e4SLinus Torvalds *deny |= i ; 12731da177e4SLinus Torvalds } 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds static int 12771da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12781da177e4SLinus Torvalds unsigned int access, deny; 12791da177e4SLinus Torvalds 12801da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12811da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12821da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12831da177e4SLinus Torvalds return 0; 12841da177e4SLinus Torvalds return 1; 12851da177e4SLinus Torvalds } 12861da177e4SLinus Torvalds 12871da177e4SLinus Torvalds /* 12881da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12891da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12901da177e4SLinus Torvalds */ 1291b37ad28bSAl Viro static __be32 12921da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12931da177e4SLinus Torvalds { 12941da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12951da177e4SLinus Torvalds struct nfs4_file *fp; 12961da177e4SLinus Torvalds struct nfs4_stateid *stp; 1297b37ad28bSAl Viro __be32 ret; 12981da177e4SLinus Torvalds 12991da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 13001da177e4SLinus Torvalds 13011da177e4SLinus Torvalds fp = find_file(ino); 130213cd2184SNeilBrown if (!fp) 130313cd2184SNeilBrown return nfs_ok; 1304b700949bSNeilBrown ret = nfserr_locked; 13051da177e4SLinus Torvalds /* Search for conflicting share reservations */ 13068beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 13071da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 13081da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 130913cd2184SNeilBrown goto out; 13101da177e4SLinus Torvalds } 131113cd2184SNeilBrown ret = nfs_ok; 131213cd2184SNeilBrown out: 131313cd2184SNeilBrown put_nfs4_file(fp); 131413cd2184SNeilBrown return ret; 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds 13171da177e4SLinus Torvalds static inline void 13181da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13191da177e4SLinus Torvalds { 13201da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13217eaa36e2SJosef "Jeff" Sipek put_write_access(filp->f_path.dentry->d_inode); 13221da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13231da177e4SLinus Torvalds } 13241da177e4SLinus Torvalds } 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds /* 13271da177e4SLinus Torvalds * Recall a delegation 13281da177e4SLinus Torvalds */ 13291da177e4SLinus Torvalds static int 13301da177e4SLinus Torvalds do_recall(void *__dp) 13311da177e4SLinus Torvalds { 13321da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13331da177e4SLinus Torvalds 133447f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 13351da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13361da177e4SLinus Torvalds return 0; 13371da177e4SLinus Torvalds } 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds /* 13401da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13411da177e4SLinus Torvalds * by the lease (file_lock) 13421da177e4SLinus Torvalds * 13431da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13441da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13451da177e4SLinus Torvalds * lease. 13461da177e4SLinus Torvalds */ 13471da177e4SLinus Torvalds static 13481da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13491da177e4SLinus Torvalds { 13501da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13511da177e4SLinus Torvalds struct task_struct *t; 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13541da177e4SLinus Torvalds if (!dp) 13551da177e4SLinus Torvalds return; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13581da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13591da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13601da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13611da177e4SLinus Torvalds * it's safe to take a reference: */ 13621da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds spin_lock(&recall_lock); 13651da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13661da177e4SLinus Torvalds spin_unlock(&recall_lock); 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13691da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13721da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13751da177e4SLinus Torvalds if (IS_ERR(t)) { 13761da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13791da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13801da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13811da177e4SLinus Torvalds nfs4_put_delegation(dp); 13821da177e4SLinus Torvalds } 13831da177e4SLinus Torvalds } 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds /* 13861da177e4SLinus Torvalds * The file_lock is being reapd. 13871da177e4SLinus Torvalds * 13881da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13891da177e4SLinus Torvalds */ 13901da177e4SLinus Torvalds static 13911da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13921da177e4SLinus Torvalds { 13931da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13981da177e4SLinus Torvalds return; 13991da177e4SLinus Torvalds dp->dl_flock = NULL; 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds /* 14031da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 14041da177e4SLinus Torvalds * 1405a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 14061da177e4SLinus Torvalds */ 14071da177e4SLinus Torvalds static 14081da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 14091da177e4SLinus Torvalds { 14101da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14111da177e4SLinus Torvalds 14121da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14131da177e4SLinus Torvalds if (!dp) 14141da177e4SLinus Torvalds return; 14151da177e4SLinus Torvalds dp->dl_flock = new; 14161da177e4SLinus Torvalds } 14171da177e4SLinus Torvalds 14181da177e4SLinus Torvalds /* 1419a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 14201da177e4SLinus Torvalds */ 14211da177e4SLinus Torvalds static 14221da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14231da177e4SLinus Torvalds { 14241da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14251da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14261da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14271da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14301da177e4SLinus Torvalds return 0; 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 14351da177e4SLinus Torvalds 14361da177e4SLinus Torvalds static 14371da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14381da177e4SLinus Torvalds { 14391da177e4SLinus Torvalds if (arg & F_UNLCK) 14401da177e4SLinus Torvalds return lease_modify(onlist, arg); 14411da177e4SLinus Torvalds else 14421da177e4SLinus Torvalds return -EAGAIN; 14431da177e4SLinus Torvalds } 14441da177e4SLinus Torvalds 1445fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14461da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14471da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14481da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14491da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14501da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14511da177e4SLinus Torvalds }; 14521da177e4SLinus Torvalds 14531da177e4SLinus Torvalds 1454b37ad28bSAl Viro __be32 14551da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14561da177e4SLinus Torvalds { 14571da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14581da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14591da177e4SLinus Torvalds unsigned int strhashval; 14601da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14611da177e4SLinus Torvalds 14621da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14630f442aa2SJ. Bruce Fields return nfserr_inval; 14641da177e4SLinus Torvalds 14651da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14661da177e4SLinus Torvalds return nfserr_stale_clientid; 14671da177e4SLinus Torvalds 14681da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14691da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14701da177e4SLinus Torvalds open->op_stateowner = sop; 14710f442aa2SJ. Bruce Fields if (!sop) { 14720f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14730f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14740f442aa2SJ. Bruce Fields if (clp == NULL) 14750f442aa2SJ. Bruce Fields return nfserr_expired; 14760f442aa2SJ. Bruce Fields goto renew; 14770f442aa2SJ. Bruce Fields } 1478ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14790f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1480ae8b6253SJ. Bruce Fields clp = sop->so_client; 1481ae8b6253SJ. Bruce Fields release_stateowner(sop); 14820f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1483ae8b6253SJ. Bruce Fields goto renew; 14840f442aa2SJ. Bruce Fields } 14850f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14861da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1487a90b061cSAl Viro return nfserr_replay_me; 14881da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14891da177e4SLinus Torvalds * that we don't even have replay data saved! 14901da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14911da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14921da177e4SLinus Torvalds * fail again for the same reason. 14931da177e4SLinus Torvalds */ 14940f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14951da177e4SLinus Torvalds goto renew; 14961da177e4SLinus Torvalds } 14970f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14980f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14990f442aa2SJ. Bruce Fields renew: 15000f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 15011da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 15021da177e4SLinus Torvalds if (sop == NULL) 15030f442aa2SJ. Bruce Fields return nfserr_resource; 15041da177e4SLinus Torvalds open->op_stateowner = sop; 15050f442aa2SJ. Bruce Fields } 15060f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 15071da177e4SLinus Torvalds renew_client(sop->so_client); 15080f442aa2SJ. Bruce Fields return nfs_ok; 15091da177e4SLinus Torvalds } 15101da177e4SLinus Torvalds 1511b37ad28bSAl Viro static inline __be32 15124a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15134a6e43e6SNeilBrown { 15144a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15154a6e43e6SNeilBrown return nfserr_openmode; 15164a6e43e6SNeilBrown else 15174a6e43e6SNeilBrown return nfs_ok; 15184a6e43e6SNeilBrown } 15194a6e43e6SNeilBrown 152052f4fb43SNeilBrown static struct nfs4_delegation * 152152f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 152252f4fb43SNeilBrown { 152352f4fb43SNeilBrown struct nfs4_delegation *dp; 152452f4fb43SNeilBrown 1525ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 152652f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 152752f4fb43SNeilBrown return dp; 152852f4fb43SNeilBrown } 152952f4fb43SNeilBrown return NULL; 153052f4fb43SNeilBrown } 153152f4fb43SNeilBrown 1532b37ad28bSAl Viro static __be32 1533567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1534567d9829SNeilBrown struct nfs4_delegation **dp) 1535567d9829SNeilBrown { 1536567d9829SNeilBrown int flags; 1537b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1538567d9829SNeilBrown 1539567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1540567d9829SNeilBrown if (*dp == NULL) 1541c44c5eebSNeilBrown goto out; 1542567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1543567d9829SNeilBrown RD_STATE : WR_STATE; 1544567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1545567d9829SNeilBrown if (status) 1546567d9829SNeilBrown *dp = NULL; 1547c44c5eebSNeilBrown out: 1548c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1549c44c5eebSNeilBrown return nfs_ok; 1550c44c5eebSNeilBrown if (status) 1551c44c5eebSNeilBrown return status; 1552c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1553c44c5eebSNeilBrown return nfs_ok; 1554567d9829SNeilBrown } 1555567d9829SNeilBrown 1556b37ad28bSAl Viro static __be32 15571da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15581da177e4SLinus Torvalds { 15591da177e4SLinus Torvalds struct nfs4_stateid *local; 1560b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15611da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15621da177e4SLinus Torvalds 15638beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15641da177e4SLinus Torvalds /* ignore lock owners */ 15651da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15661da177e4SLinus Torvalds continue; 15671da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15681da177e4SLinus Torvalds if (local->st_stateowner == sop) 15691da177e4SLinus Torvalds *stpp = local; 15701da177e4SLinus Torvalds /* check for conflicting share reservations */ 15711da177e4SLinus Torvalds if (!test_share(local, open)) 15721da177e4SLinus Torvalds goto out; 15731da177e4SLinus Torvalds } 15741da177e4SLinus Torvalds status = 0; 15751da177e4SLinus Torvalds out: 15761da177e4SLinus Torvalds return status; 15771da177e4SLinus Torvalds } 15781da177e4SLinus Torvalds 15795ac049acSNeilBrown static inline struct nfs4_stateid * 15805ac049acSNeilBrown nfs4_alloc_stateid(void) 15815ac049acSNeilBrown { 15825ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15835ac049acSNeilBrown } 15845ac049acSNeilBrown 1585b37ad28bSAl Viro static __be32 15861da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1587567d9829SNeilBrown struct nfs4_delegation *dp, 15881da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15891da177e4SLinus Torvalds { 15901da177e4SLinus Torvalds struct nfs4_stateid *stp; 15911da177e4SLinus Torvalds 15925ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15931da177e4SLinus Torvalds if (stp == NULL) 15941da177e4SLinus Torvalds return nfserr_resource; 15951da177e4SLinus Torvalds 1596567d9829SNeilBrown if (dp) { 1597567d9829SNeilBrown get_file(dp->dl_vfs_file); 1598567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1599567d9829SNeilBrown } else { 1600b37ad28bSAl Viro __be32 status; 1601567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1602567d9829SNeilBrown &stp->st_vfs_file); 16031da177e4SLinus Torvalds if (status) { 16041da177e4SLinus Torvalds if (status == nfserr_dropit) 16051da177e4SLinus Torvalds status = nfserr_jukebox; 16065ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 16071da177e4SLinus Torvalds return status; 16081da177e4SLinus Torvalds } 1609567d9829SNeilBrown } 16101da177e4SLinus Torvalds *stpp = stp; 16111da177e4SLinus Torvalds return 0; 16121da177e4SLinus Torvalds } 16131da177e4SLinus Torvalds 1614b37ad28bSAl Viro static inline __be32 16151da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16161da177e4SLinus Torvalds struct nfsd4_open *open) 16171da177e4SLinus Torvalds { 16181da177e4SLinus Torvalds struct iattr iattr = { 16191da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16201da177e4SLinus Torvalds .ia_size = 0, 16211da177e4SLinus Torvalds }; 16221da177e4SLinus Torvalds if (!open->op_truncate) 16231da177e4SLinus Torvalds return 0; 16241da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16259246585aSAl Viro return nfserr_inval; 16261da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16271da177e4SLinus Torvalds } 16281da177e4SLinus Torvalds 1629b37ad28bSAl Viro static __be32 16301da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16311da177e4SLinus Torvalds { 16321da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16337eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 16346c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1635b37ad28bSAl Viro __be32 status; 16361da177e4SLinus Torvalds 16371da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16386c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16396c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16401da177e4SLinus Torvalds 16416c26d08fSJ. Bruce Fields if (new_writer) { 1642b37ad28bSAl Viro int err = get_write_access(inode); 1643b37ad28bSAl Viro if (err) 1644b37ad28bSAl Viro return nfserrno(err); 16456c26d08fSJ. Bruce Fields } 16461da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16471da177e4SLinus Torvalds if (status) { 16486c26d08fSJ. Bruce Fields if (new_writer) 16491da177e4SLinus Torvalds put_write_access(inode); 16501da177e4SLinus Torvalds return status; 16511da177e4SLinus Torvalds } 16521da177e4SLinus Torvalds /* remember the open */ 16536c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16541da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16551da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16561da177e4SLinus Torvalds 16571da177e4SLinus Torvalds return nfs_ok; 16581da177e4SLinus Torvalds } 16591da177e4SLinus Torvalds 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds static void 166237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1665c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16661da177e4SLinus Torvalds } 16671da177e4SLinus Torvalds 16681da177e4SLinus Torvalds /* 16691da177e4SLinus Torvalds * Attempt to hand out a delegation. 16701da177e4SLinus Torvalds */ 16711da177e4SLinus Torvalds static void 16721da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16731da177e4SLinus Torvalds { 16741da177e4SLinus Torvalds struct nfs4_delegation *dp; 16751da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16761da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16771da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16781da177e4SLinus Torvalds int status, flag = 0; 16791da177e4SLinus Torvalds 16801da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16817b190fecSNeilBrown open->op_recall = 0; 16827b190fecSNeilBrown switch (open->op_claim_type) { 16837b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16847b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16857b190fecSNeilBrown open->op_recall = 1; 16867b190fecSNeilBrown flag = open->op_delegate_type; 16877b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16881da177e4SLinus Torvalds goto out; 16897b190fecSNeilBrown break; 16907b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16917b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16927b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16937b190fecSNeilBrown if (nfs4_in_grace()) 16947b190fecSNeilBrown goto out; 16957b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16967b190fecSNeilBrown goto out; 16971da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16981da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16991da177e4SLinus Torvalds else 17001da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 17017b190fecSNeilBrown break; 17027b190fecSNeilBrown default: 17037b190fecSNeilBrown goto out; 17047b190fecSNeilBrown } 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 17071da177e4SLinus Torvalds if (dp == NULL) { 17081da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17091da177e4SLinus Torvalds goto out; 17101da177e4SLinus Torvalds } 17111da177e4SLinus Torvalds locks_init_lock(&fl); 17121da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17131da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17141da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17151da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17161da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17171da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17181da177e4SLinus Torvalds 1719a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 17201da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17211da177e4SLinus Torvalds */ 1722a9933ceaSJ. Bruce Fields if ((status = vfs_setlease(stp->st_vfs_file, 17231da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17241da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1725c907132dSNeilBrown unhash_delegation(dp); 17261da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17271da177e4SLinus Torvalds goto out; 17281da177e4SLinus Torvalds } 17291da177e4SLinus Torvalds 17301da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17331da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17341da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17351da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17361da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17371da177e4SLinus Torvalds out: 17387b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17397b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17407b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17417b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17421da177e4SLinus Torvalds open->op_delegate_type = flag; 17431da177e4SLinus Torvalds } 17441da177e4SLinus Torvalds 17451da177e4SLinus Torvalds /* 17461da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17471da177e4SLinus Torvalds */ 1748b37ad28bSAl Viro __be32 17491da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17501da177e4SLinus Torvalds { 17511da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17521da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17531da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1754567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1755b37ad28bSAl Viro __be32 status; 17561da177e4SLinus Torvalds 17571da177e4SLinus Torvalds status = nfserr_inval; 1758ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1759ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17601da177e4SLinus Torvalds goto out; 17611da177e4SLinus Torvalds /* 17621da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17631da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17641da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17651da177e4SLinus Torvalds */ 17661da177e4SLinus Torvalds fp = find_file(ino); 17671da177e4SLinus Torvalds if (fp) { 17681da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17691da177e4SLinus Torvalds goto out; 1770c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1771c44c5eebSNeilBrown if (status) 1772c44c5eebSNeilBrown goto out; 17731da177e4SLinus Torvalds } else { 1774c44c5eebSNeilBrown status = nfserr_bad_stateid; 1775c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1776c44c5eebSNeilBrown goto out; 17771da177e4SLinus Torvalds status = nfserr_resource; 17781da177e4SLinus Torvalds fp = alloc_init_file(ino); 17791da177e4SLinus Torvalds if (fp == NULL) 17801da177e4SLinus Torvalds goto out; 17811da177e4SLinus Torvalds } 17821da177e4SLinus Torvalds 17831da177e4SLinus Torvalds /* 17841da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17851da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17861da177e4SLinus Torvalds */ 17871da177e4SLinus Torvalds if (stp) { 17881da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17891da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17901da177e4SLinus Torvalds if (status) 17911da177e4SLinus Torvalds goto out; 1792444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17931da177e4SLinus Torvalds } else { 17941da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17951da177e4SLinus Torvalds int flags = 0; 17969ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17979ecb6a08SJ. Bruce Fields flags |= MAY_READ; 17981da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17999ecb6a08SJ. Bruce Fields flags |= MAY_WRITE; 1800567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1801567d9829SNeilBrown if (status) 18021da177e4SLinus Torvalds goto out; 18031da177e4SLinus Torvalds init_stateid(stp, fp, open); 18041da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 18051da177e4SLinus Torvalds if (status) { 18061da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 18071da177e4SLinus Torvalds goto out; 18081da177e4SLinus Torvalds } 18091da177e4SLinus Torvalds } 18101da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18111da177e4SLinus Torvalds 18121da177e4SLinus Torvalds /* 18131da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18141da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18151da177e4SLinus Torvalds */ 18161da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18171da177e4SLinus Torvalds 18181da177e4SLinus Torvalds status = nfs_ok; 18191da177e4SLinus Torvalds 18201da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18211da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18221da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18231da177e4SLinus Torvalds out: 182413cd2184SNeilBrown if (fp) 182513cd2184SNeilBrown put_nfs4_file(fp); 182637515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 182737515177SNeilBrown nfs4_set_claim_prev(open); 18281da177e4SLinus Torvalds /* 18291da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18301da177e4SLinus Torvalds */ 18311da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18321da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18331da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18341da177e4SLinus Torvalds 18351da177e4SLinus Torvalds return status; 18361da177e4SLinus Torvalds } 18371da177e4SLinus Torvalds 183858da282bSNeilBrown static struct workqueue_struct *laundry_wq; 1839c4028958SDavid Howells static void laundromat_main(struct work_struct *); 1840c4028958SDavid Howells static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 18411da177e4SLinus Torvalds 1842b37ad28bSAl Viro __be32 1843b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1844b591480bSJ.Bruce Fields clientid_t *clid) 18451da177e4SLinus Torvalds { 18461da177e4SLinus Torvalds struct nfs4_client *clp; 1847b37ad28bSAl Viro __be32 status; 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds nfs4_lock_state(); 18501da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18511da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18521da177e4SLinus Torvalds status = nfserr_stale_clientid; 18531da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18541da177e4SLinus Torvalds goto out; 18551da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18561da177e4SLinus Torvalds status = nfserr_expired; 18571da177e4SLinus Torvalds if (clp == NULL) { 18581da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18591da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18601da177e4SLinus Torvalds goto out; 18611da177e4SLinus Torvalds } 18621da177e4SLinus Torvalds renew_client(clp); 18631da177e4SLinus Torvalds status = nfserr_cb_path_down; 1864ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18651da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18661da177e4SLinus Torvalds goto out; 18671da177e4SLinus Torvalds status = nfs_ok; 18681da177e4SLinus Torvalds out: 18691da177e4SLinus Torvalds nfs4_unlock_state(); 18701da177e4SLinus Torvalds return status; 18711da177e4SLinus Torvalds } 18721da177e4SLinus Torvalds 1873a76b4319SNeilBrown static void 1874a76b4319SNeilBrown end_grace(void) 1875a76b4319SNeilBrown { 1876a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1877c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1878a76b4319SNeilBrown in_grace = 0; 1879a76b4319SNeilBrown } 1880a76b4319SNeilBrown 1881fd39ca9aSNeilBrown static time_t 18821da177e4SLinus Torvalds nfs4_laundromat(void) 18831da177e4SLinus Torvalds { 18841da177e4SLinus Torvalds struct nfs4_client *clp; 18851da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18861da177e4SLinus Torvalds struct nfs4_delegation *dp; 18871da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18881da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18891da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18901da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18911da177e4SLinus Torvalds 18921da177e4SLinus Torvalds nfs4_lock_state(); 18931da177e4SLinus Torvalds 18941da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1895a76b4319SNeilBrown if (in_grace) 1896a76b4319SNeilBrown end_grace(); 18971da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18981da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18991da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 19001da177e4SLinus Torvalds t = clp->cl_time - cutoff; 19011da177e4SLinus Torvalds if (clientid_val > t) 19021da177e4SLinus Torvalds clientid_val = t; 19031da177e4SLinus Torvalds break; 19041da177e4SLinus Torvalds } 19051da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 19061da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1907c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 19081da177e4SLinus Torvalds expire_client(clp); 19091da177e4SLinus Torvalds } 19101da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19111da177e4SLinus Torvalds spin_lock(&recall_lock); 19121da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19131da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19141da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19151da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19161da177e4SLinus Torvalds if (test_val > u) 19171da177e4SLinus Torvalds test_val = u; 19181da177e4SLinus Torvalds break; 19191da177e4SLinus Torvalds } 19201da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19211da177e4SLinus Torvalds dp, dp->dl_flock); 19221da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds spin_unlock(&recall_lock); 19251da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19261da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19271da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19281da177e4SLinus Torvalds unhash_delegation(dp); 19291da177e4SLinus Torvalds } 19301da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19311da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19321da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19331da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19341da177e4SLinus Torvalds u = sop->so_time - cutoff; 19351da177e4SLinus Torvalds if (test_val > u) 19361da177e4SLinus Torvalds test_val = u; 19371da177e4SLinus Torvalds break; 19381da177e4SLinus Torvalds } 19391da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19401da177e4SLinus Torvalds sop->so_id); 1941358dd55aSNeilBrown release_stateowner(sop); 19421da177e4SLinus Torvalds } 19431da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19441da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19451da177e4SLinus Torvalds nfs4_unlock_state(); 19461da177e4SLinus Torvalds return clientid_val; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds 19491da177e4SLinus Torvalds void 1950c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19511da177e4SLinus Torvalds { 19521da177e4SLinus Torvalds time_t t; 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds t = nfs4_laundromat(); 19551da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 195658da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds 1959fd39ca9aSNeilBrown static struct nfs4_stateowner * 1960f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1961f8816512SNeilBrown { 19621da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19631da177e4SLinus Torvalds 19641da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19651da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19661da177e4SLinus Torvalds if (local->so_id == st_id) 19671da177e4SLinus Torvalds return local; 19681da177e4SLinus Torvalds } 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds return NULL; 19711da177e4SLinus Torvalds } 19721da177e4SLinus Torvalds 19731da177e4SLinus Torvalds static inline int 19741da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19751da177e4SLinus Torvalds { 19767eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19771da177e4SLinus Torvalds } 19781da177e4SLinus Torvalds 19791da177e4SLinus Torvalds static int 19801da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19811da177e4SLinus Torvalds { 19821da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19831da177e4SLinus Torvalds return 0; 1984849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19851da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19861da177e4SLinus Torvalds stateid->si_generation); 19871da177e4SLinus Torvalds return 1; 19881da177e4SLinus Torvalds } 19891da177e4SLinus Torvalds 19901da177e4SLinus Torvalds static inline int 19911da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19921da177e4SLinus Torvalds { 19931da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19941da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19951da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19961da177e4SLinus Torvalds } 19971da177e4SLinus Torvalds 19981da177e4SLinus Torvalds static inline int 19991da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 20001da177e4SLinus Torvalds { 20011da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 20021da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds static 2006b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 20071da177e4SLinus Torvalds { 2008b37ad28bSAl Viro __be32 status = nfserr_openmode; 20091da177e4SLinus Torvalds 20101da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20111da177e4SLinus Torvalds goto out; 20121da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20131da177e4SLinus Torvalds goto out; 20141da177e4SLinus Torvalds status = nfs_ok; 20151da177e4SLinus Torvalds out: 20161da177e4SLinus Torvalds return status; 20171da177e4SLinus Torvalds } 20181da177e4SLinus Torvalds 2019b37ad28bSAl Viro static inline __be32 20201da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20211da177e4SLinus Torvalds { 20221da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20231da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20241da177e4SLinus Torvalds return nfserr_bad_stateid; 20251da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20261da177e4SLinus Torvalds return nfs_ok; 20271da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20281da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20291da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20301da177e4SLinus Torvalds return nfserr_grace; 20311da177e4SLinus Torvalds } else if (flags & WR_STATE) 20321da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20331da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20341da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20351da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20361da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20371da177e4SLinus Torvalds } 20381da177e4SLinus Torvalds 20391da177e4SLinus Torvalds /* 20401da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20411da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20421da177e4SLinus Torvalds */ 20431da177e4SLinus Torvalds static inline int 20441da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20451da177e4SLinus Torvalds { 20461da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 2047*a16877caSPavel Emelyanov && mandatory_lock(inode); 20481da177e4SLinus Torvalds } 20491da177e4SLinus Torvalds 20501da177e4SLinus Torvalds /* 20511da177e4SLinus Torvalds * Checks for stateid operations 20521da177e4SLinus Torvalds */ 2053b37ad28bSAl Viro __be32 20541da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20551da177e4SLinus Torvalds { 20561da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20571da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20581da177e4SLinus Torvalds stateid_t *stidp; 20591da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2060b37ad28bSAl Viro __be32 status; 20611da177e4SLinus Torvalds 20621da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20631da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20641da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20651da177e4SLinus Torvalds if (filpp) 20661da177e4SLinus Torvalds *filpp = NULL; 20671da177e4SLinus Torvalds 20681da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20691da177e4SLinus Torvalds return nfserr_grace; 20701da177e4SLinus Torvalds 20711da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20721da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20731da177e4SLinus Torvalds 20741da177e4SLinus Torvalds /* STALE STATEID */ 20751da177e4SLinus Torvalds status = nfserr_stale_stateid; 20761da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20771da177e4SLinus Torvalds goto out; 20781da177e4SLinus Torvalds 20791da177e4SLinus Torvalds /* BAD STATEID */ 20801da177e4SLinus Torvalds status = nfserr_bad_stateid; 20811da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20821da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20831da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20841da177e4SLinus Torvalds goto out; 20851da177e4SLinus Torvalds } 20861da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20871da177e4SLinus Torvalds } else { /* open or lock stateid */ 20881da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20891da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20901da177e4SLinus Torvalds goto out; 20911da177e4SLinus Torvalds } 20921da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20931da177e4SLinus Torvalds goto out; 20941da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20951da177e4SLinus Torvalds goto out; 20961da177e4SLinus Torvalds stidp = &stp->st_stateid; 20971da177e4SLinus Torvalds } 20981da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 20991da177e4SLinus Torvalds goto out; 21001da177e4SLinus Torvalds 21011da177e4SLinus Torvalds /* OLD STATEID */ 21021da177e4SLinus Torvalds status = nfserr_old_stateid; 21031da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 21041da177e4SLinus Torvalds goto out; 21051da177e4SLinus Torvalds if (stp) { 21061da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 21071da177e4SLinus Torvalds goto out; 21081da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21091da177e4SLinus Torvalds if (filpp) 21101da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21111da177e4SLinus Torvalds } else if (dp) { 21121da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 21131da177e4SLinus Torvalds goto out; 21141da177e4SLinus Torvalds renew_client(dp->dl_client); 21151da177e4SLinus Torvalds if (flags & DELEG_RET) 21161da177e4SLinus Torvalds unhash_delegation(dp); 21171da177e4SLinus Torvalds if (filpp) 21181da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21191da177e4SLinus Torvalds } 21201da177e4SLinus Torvalds status = nfs_ok; 21211da177e4SLinus Torvalds out: 21221da177e4SLinus Torvalds return status; 21231da177e4SLinus Torvalds } 21241da177e4SLinus Torvalds 21254c4cd222SNeilBrown static inline int 21264c4cd222SNeilBrown setlkflg (int type) 21274c4cd222SNeilBrown { 21284c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21294c4cd222SNeilBrown RD_STATE : WR_STATE; 21304c4cd222SNeilBrown } 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds /* 21331da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21341da177e4SLinus Torvalds */ 2135b37ad28bSAl Viro static __be32 21364c4cd222SNeilBrown 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) 21371da177e4SLinus Torvalds { 21381da177e4SLinus Torvalds struct nfs4_stateid *stp; 21391da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21401da177e4SLinus Torvalds 21411da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21421da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21431da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21441da177e4SLinus Torvalds stateid->si_generation); 21451da177e4SLinus Torvalds 21461da177e4SLinus Torvalds *stpp = NULL; 21471da177e4SLinus Torvalds *sopp = NULL; 21481da177e4SLinus Torvalds 21491da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21501da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21513a4f98bbSNeilBrown return nfserr_bad_stateid; 21521da177e4SLinus Torvalds } 21531da177e4SLinus Torvalds 21541da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21553a4f98bbSNeilBrown return nfserr_stale_stateid; 21561da177e4SLinus Torvalds /* 21571da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21581da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21591da177e4SLinus Torvalds * number is incorrect. 21601da177e4SLinus Torvalds */ 2161f8816512SNeilBrown stp = find_stateid(stateid, flags); 2162f8816512SNeilBrown if (stp == NULL) { 2163f8816512SNeilBrown /* 2164f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2165f8816512SNeilBrown * a replayed close: 2166f8816512SNeilBrown */ 2167f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2168f8816512SNeilBrown if (sop == NULL) 2169f8816512SNeilBrown return nfserr_bad_stateid; 2170f8816512SNeilBrown *sopp = sop; 2171f8816512SNeilBrown goto check_replay; 2172f8816512SNeilBrown } 21731da177e4SLinus Torvalds 21744c4cd222SNeilBrown if (lock) { 21751da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21764c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21771da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21784c4cd222SNeilBrown int lkflg = 0; 2179b37ad28bSAl Viro __be32 status; 21801da177e4SLinus Torvalds 21814c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21824c4cd222SNeilBrown 21834c4cd222SNeilBrown if (lock->lk_is_new) { 21841da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21853a4f98bbSNeilBrown return nfserr_bad_stateid; 21861da177e4SLinus Torvalds if (!cmp_clid(&clp->cl_clientid, lockclid)) 21873a4f98bbSNeilBrown return nfserr_bad_stateid; 21884c4cd222SNeilBrown /* stp is the open stateid */ 21894c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21904c4cd222SNeilBrown if (status) 21914c4cd222SNeilBrown return status; 21924c4cd222SNeilBrown } else { 21934c4cd222SNeilBrown /* stp is the lock stateid */ 21944c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21954c4cd222SNeilBrown if (status) 21964c4cd222SNeilBrown return status; 21974c4cd222SNeilBrown } 21984c4cd222SNeilBrown 21991da177e4SLinus Torvalds } 22001da177e4SLinus Torvalds 22011da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 22021da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 22033a4f98bbSNeilBrown return nfserr_bad_stateid; 22041da177e4SLinus Torvalds } 22051da177e4SLinus Torvalds 22061da177e4SLinus Torvalds *stpp = stp; 22071da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvalds /* 22101da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22111da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22121da177e4SLinus Torvalds * generation number wraparound. 22131da177e4SLinus Torvalds */ 2214bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22151da177e4SLinus Torvalds goto check_replay; 22161da177e4SLinus Torvalds 22173a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22183a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: expected" 22193a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22203a4f98bbSNeilBrown return nfserr_bad_stateid; 22211da177e4SLinus Torvalds } 22223a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22233a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: stateowner not" 22243a4f98bbSNeilBrown " confirmed yet!\n"); 22253a4f98bbSNeilBrown return nfserr_bad_stateid; 22261da177e4SLinus Torvalds } 22271da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22281da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22293a4f98bbSNeilBrown return nfserr_bad_stateid; 22301da177e4SLinus Torvalds } 22311da177e4SLinus Torvalds 22321da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22331da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: old stateid!\n"); 22343a4f98bbSNeilBrown return nfserr_old_stateid; 22351da177e4SLinus Torvalds } 223652fd004eSNeilBrown renew_client(sop->so_client); 22373a4f98bbSNeilBrown return nfs_ok; 22381da177e4SLinus Torvalds 22391da177e4SLinus Torvalds check_replay: 2240bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2241849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22421da177e4SLinus Torvalds /* indicate replay to calling function */ 2243a90b061cSAl Viro return nfserr_replay_me; 22441da177e4SLinus Torvalds } 22453a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22463a4f98bbSNeilBrown sop->so_seqid, seqid); 22473a4f98bbSNeilBrown *sopp = NULL; 22483a4f98bbSNeilBrown return nfserr_bad_seqid; 22491da177e4SLinus Torvalds } 22501da177e4SLinus Torvalds 2251b37ad28bSAl Viro __be32 2252ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2253a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22541da177e4SLinus Torvalds { 2255b37ad28bSAl Viro __be32 status; 22561da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22571da177e4SLinus Torvalds struct nfs4_stateid *stp; 22581da177e4SLinus Torvalds 22591da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2260ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2261ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22621da177e4SLinus Torvalds 2263ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2264a8cddc5dSJ. Bruce Fields if (status) 2265a8cddc5dSJ. Bruce Fields return status; 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds nfs4_lock_state(); 22681da177e4SLinus Torvalds 2269ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2270ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 22711da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22721da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22731da177e4SLinus Torvalds goto out; 22741da177e4SLinus Torvalds 22751da177e4SLinus Torvalds sop = oc->oc_stateowner; 22761da177e4SLinus Torvalds sop->so_confirmed = 1; 22771da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22781da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22801da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22811da177e4SLinus Torvalds stp->st_stateid.si_boot, 22821da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22831da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22841da177e4SLinus Torvalds stp->st_stateid.si_generation); 2285c7b9a459SNeilBrown 2286c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22871da177e4SLinus Torvalds out: 2288f2327d9aSNeil Brown if (oc->oc_stateowner) { 22891da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2290a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2291f2327d9aSNeil Brown } 22921da177e4SLinus Torvalds nfs4_unlock_state(); 22931da177e4SLinus Torvalds return status; 22941da177e4SLinus Torvalds } 22951da177e4SLinus Torvalds 22961da177e4SLinus Torvalds 22971da177e4SLinus Torvalds /* 22981da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22991da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 23001da177e4SLinus Torvalds */ 23011da177e4SLinus Torvalds static void 23021da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 23031da177e4SLinus Torvalds { 23041da177e4SLinus Torvalds int i; 23051da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 23061da177e4SLinus Torvalds if ((i & access) != i) 23071da177e4SLinus Torvalds __clear_bit(i, bmap); 23081da177e4SLinus Torvalds } 23091da177e4SLinus Torvalds } 23101da177e4SLinus Torvalds 23111da177e4SLinus Torvalds static void 23121da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23131da177e4SLinus Torvalds { 23141da177e4SLinus Torvalds int i; 23151da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23161da177e4SLinus Torvalds if ((i & deny) != i) 23171da177e4SLinus Torvalds __clear_bit(i, bmap); 23181da177e4SLinus Torvalds } 23191da177e4SLinus Torvalds } 23201da177e4SLinus Torvalds 2321b37ad28bSAl Viro __be32 2322ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2323ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2324a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 23251da177e4SLinus Torvalds { 2326b37ad28bSAl Viro __be32 status; 23271da177e4SLinus Torvalds struct nfs4_stateid *stp; 23281da177e4SLinus Torvalds unsigned int share_access; 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2331ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2332ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23331da177e4SLinus Torvalds 2334ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2335ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23361da177e4SLinus Torvalds return nfserr_inval; 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds nfs4_lock_state(); 2339ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2340ca364317SJ.Bruce Fields od->od_seqid, 23411da177e4SLinus Torvalds &od->od_stateid, 23421da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23431da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23441da177e4SLinus Torvalds goto out; 23451da177e4SLinus Torvalds 23461da177e4SLinus Torvalds status = nfserr_inval; 23471da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23481da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23491da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23501da177e4SLinus Torvalds goto out; 23511da177e4SLinus Torvalds } 23521da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23531da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23541da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23551da177e4SLinus Torvalds goto out; 23561da177e4SLinus Torvalds } 23571da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23581da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23591da177e4SLinus Torvalds share_access & ~od->od_share_access); 23601da177e4SLinus Torvalds 23611da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23621da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23631da177e4SLinus Torvalds 23641da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23651da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23661da177e4SLinus Torvalds status = nfs_ok; 23671da177e4SLinus Torvalds out: 2368f2327d9aSNeil Brown if (od->od_stateowner) { 23691da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2370a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2371f2327d9aSNeil Brown } 23721da177e4SLinus Torvalds nfs4_unlock_state(); 23731da177e4SLinus Torvalds return status; 23741da177e4SLinus Torvalds } 23751da177e4SLinus Torvalds 23761da177e4SLinus Torvalds /* 23771da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23781da177e4SLinus Torvalds */ 2379b37ad28bSAl Viro __be32 2380ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2381a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23821da177e4SLinus Torvalds { 2383b37ad28bSAl Viro __be32 status; 23841da177e4SLinus Torvalds struct nfs4_stateid *stp; 23851da177e4SLinus Torvalds 23861da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2387ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2388ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23891da177e4SLinus Torvalds 23901da177e4SLinus Torvalds nfs4_lock_state(); 23911da177e4SLinus Torvalds /* check close_lru for replay */ 2392ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2393ca364317SJ.Bruce Fields close->cl_seqid, 23941da177e4SLinus Torvalds &close->cl_stateid, 23951da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23961da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23971da177e4SLinus Torvalds goto out; 23981da177e4SLinus Torvalds status = nfs_ok; 23991da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 24001da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 24011da177e4SLinus Torvalds 240204ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 240304ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 240404ef5954SJ. Bruce Fields 240504ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 240604ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 240704ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 240804ef5954SJ. Bruce Fields */ 240904ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 241004ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 24111da177e4SLinus Torvalds out: 2412f2327d9aSNeil Brown if (close->cl_stateowner) { 24131da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2414a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2415f2327d9aSNeil Brown } 24161da177e4SLinus Torvalds nfs4_unlock_state(); 24171da177e4SLinus Torvalds return status; 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 2420b37ad28bSAl Viro __be32 2421ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2422ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 24231da177e4SLinus Torvalds { 2424b37ad28bSAl Viro __be32 status; 24251da177e4SLinus Torvalds 2426ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 24271da177e4SLinus Torvalds goto out; 24281da177e4SLinus Torvalds 24291da177e4SLinus Torvalds nfs4_lock_state(); 2430ca364317SJ.Bruce Fields status = nfs4_preprocess_stateid_op(&cstate->current_fh, 2431ca364317SJ.Bruce Fields &dr->dr_stateid, DELEG_RET, NULL); 24321da177e4SLinus Torvalds nfs4_unlock_state(); 24331da177e4SLinus Torvalds out: 24341da177e4SLinus Torvalds return status; 24351da177e4SLinus Torvalds } 24361da177e4SLinus Torvalds 24371da177e4SLinus Torvalds 24381da177e4SLinus Torvalds /* 24391da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24401da177e4SLinus Torvalds */ 24411da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24421da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24431da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24441da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24451da177e4SLinus Torvalds 24461da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24471da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24481da177e4SLinus Torvalds 24491da177e4SLinus Torvalds static inline unsigned int 24501da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24511da177e4SLinus Torvalds struct xdr_netobj *ownername) 24521da177e4SLinus Torvalds { 24531da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24541da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24551da177e4SLinus Torvalds & LOCK_HASH_MASK; 24561da177e4SLinus Torvalds } 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24591da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24601da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24611da177e4SLinus Torvalds 2462fd39ca9aSNeilBrown static struct nfs4_stateid * 24631da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24641da177e4SLinus Torvalds { 24651da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24661da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24671da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24681da177e4SLinus Torvalds unsigned int hashval; 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24711da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24721da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24731da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24741da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24751da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24761da177e4SLinus Torvalds return local; 24771da177e4SLinus Torvalds } 24781da177e4SLinus Torvalds } 24791da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24801da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24811da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24821da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24831da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24841da177e4SLinus Torvalds return local; 24851da177e4SLinus Torvalds } 2486849823c5SNeil Brown } 24871da177e4SLinus Torvalds return NULL; 24881da177e4SLinus Torvalds } 24891da177e4SLinus Torvalds 24901da177e4SLinus Torvalds static struct nfs4_delegation * 24911da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24921da177e4SLinus Torvalds { 249313cd2184SNeilBrown struct nfs4_file *fp; 249413cd2184SNeilBrown struct nfs4_delegation *dl; 24951da177e4SLinus Torvalds 24961da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24971da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24981da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24991da177e4SLinus Torvalds 25001da177e4SLinus Torvalds fp = find_file(ino); 250113cd2184SNeilBrown if (!fp) 25021da177e4SLinus Torvalds return NULL; 250313cd2184SNeilBrown dl = find_delegation_file(fp, stid); 250413cd2184SNeilBrown put_nfs4_file(fp); 250513cd2184SNeilBrown return dl; 25061da177e4SLinus Torvalds } 25071da177e4SLinus Torvalds 25081da177e4SLinus Torvalds /* 25091da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 25101da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25111da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25121da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25131da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25141da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25151da177e4SLinus Torvalds */ 25161da177e4SLinus Torvalds static inline void 25171da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25181da177e4SLinus Torvalds { 25191da177e4SLinus Torvalds if (lock->fl_start < 0) 25201da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25211da177e4SLinus Torvalds if (lock->fl_end < 0) 25221da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25231da177e4SLinus Torvalds } 25241da177e4SLinus Torvalds 2525d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2526d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2527e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2528d5b9026aSNeilBrown }; 25291da177e4SLinus Torvalds 25301da177e4SLinus Torvalds static inline void 25311da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25321da177e4SLinus Torvalds { 2533d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2534d5b9026aSNeilBrown unsigned int hval; 25351da177e4SLinus Torvalds 2536d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2537d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2538d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25391da177e4SLinus Torvalds kref_get(&sop->so_ref); 25401da177e4SLinus Torvalds deny->ld_sop = sop; 25411da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2542d5b9026aSNeilBrown } else { 2543d5b9026aSNeilBrown deny->ld_sop = NULL; 2544d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2545d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25461da177e4SLinus Torvalds } 25471da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25481da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25491da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25501da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25511da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25521da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25531da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25541da177e4SLinus Torvalds } 25551da177e4SLinus Torvalds 25561da177e4SLinus Torvalds static struct nfs4_stateowner * 25571da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25581da177e4SLinus Torvalds struct xdr_netobj *owner) 25591da177e4SLinus Torvalds { 25601da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25611da177e4SLinus Torvalds struct nfs4_stateowner *op; 25621da177e4SLinus Torvalds 25631da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25641da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25651da177e4SLinus Torvalds return op; 25661da177e4SLinus Torvalds } 25671da177e4SLinus Torvalds return NULL; 25681da177e4SLinus Torvalds } 25691da177e4SLinus Torvalds 25701da177e4SLinus Torvalds /* 25711da177e4SLinus Torvalds * Alloc a lock owner structure. 25721da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25731da177e4SLinus Torvalds * occured. 25741da177e4SLinus Torvalds * 25751da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25761da177e4SLinus Torvalds */ 25771da177e4SLinus Torvalds 25781da177e4SLinus Torvalds static struct nfs4_stateowner * 25791da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25801da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25811da177e4SLinus Torvalds struct nfs4_replay *rp; 25821da177e4SLinus Torvalds unsigned int idhashval; 25831da177e4SLinus Torvalds 25841da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25851da177e4SLinus Torvalds return NULL; 25861da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25871da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25881da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25891da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2590ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2591ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25921da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25931da177e4SLinus Torvalds sop->so_time = 0; 25941da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25951da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2596ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25971da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25981da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25991da177e4SLinus Torvalds sop->so_client = clp; 2600b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2601b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2602b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 26031da177e4SLinus Torvalds sop->so_confirmed = 1; 26041da177e4SLinus Torvalds rp = &sop->so_replay; 2605de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 26061da177e4SLinus Torvalds rp->rp_buflen = 0; 26071da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 26081da177e4SLinus Torvalds return sop; 26091da177e4SLinus Torvalds } 26101da177e4SLinus Torvalds 2611fd39ca9aSNeilBrown static struct nfs4_stateid * 26121da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26131da177e4SLinus Torvalds { 26141da177e4SLinus Torvalds struct nfs4_stateid *stp; 26151da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26161da177e4SLinus Torvalds 26175ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26185ac049acSNeilBrown if (stp == NULL) 26191da177e4SLinus Torvalds goto out; 26201da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26211da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2622ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2623ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26241da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26258beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2626ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26271da177e4SLinus Torvalds stp->st_stateowner = sop; 262813cd2184SNeilBrown get_nfs4_file(fp); 26291da177e4SLinus Torvalds stp->st_file = fp; 26301da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26311da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26321da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26331da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26341da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26351da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26361da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26374c4cd222SNeilBrown stp->st_openstp = open_stp; 26381da177e4SLinus Torvalds 26391da177e4SLinus Torvalds out: 26401da177e4SLinus Torvalds return stp; 26411da177e4SLinus Torvalds } 26421da177e4SLinus Torvalds 2643fd39ca9aSNeilBrown static int 26441da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26451da177e4SLinus Torvalds { 26461da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26471da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26481da177e4SLinus Torvalds } 26491da177e4SLinus Torvalds 26501da177e4SLinus Torvalds /* 26511da177e4SLinus Torvalds * LOCK operation 26521da177e4SLinus Torvalds */ 2653b37ad28bSAl Viro __be32 2654ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2655a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26561da177e4SLinus Torvalds { 26573e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2658b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26591da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26601da177e4SLinus Torvalds struct file *filp; 26611da177e4SLinus Torvalds struct file_lock file_lock; 26628dc7c311SAndy Adamson struct file_lock conflock; 2663b37ad28bSAl Viro __be32 status = 0; 26641da177e4SLinus Torvalds unsigned int strhashval; 2665150b3934SMarc Eshel unsigned int cmd; 2666b8dd7b9aSAl Viro int err; 26671da177e4SLinus Torvalds 26681da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26691da177e4SLinus Torvalds (long long) lock->lk_offset, 26701da177e4SLinus Torvalds (long long) lock->lk_length); 26711da177e4SLinus Torvalds 26721da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26731da177e4SLinus Torvalds return nfserr_inval; 26741da177e4SLinus Torvalds 2675ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 2676ca364317SJ.Bruce Fields S_IFREG, MAY_LOCK))) { 2677a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2678a6f6ef2fSAndy Adamson return status; 2679a6f6ef2fSAndy Adamson } 2680a6f6ef2fSAndy Adamson 26811da177e4SLinus Torvalds nfs4_lock_state(); 26821da177e4SLinus Torvalds 26831da177e4SLinus Torvalds if (lock->lk_is_new) { 26841da177e4SLinus Torvalds /* 26851da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2686893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2687893f8770SNeilBrown * lock stateid. 26881da177e4SLinus Torvalds */ 26891da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26901da177e4SLinus Torvalds struct nfs4_file *fp; 26911da177e4SLinus Torvalds 26921da177e4SLinus Torvalds status = nfserr_stale_clientid; 2693849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26941da177e4SLinus Torvalds goto out; 26951da177e4SLinus Torvalds 26961da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2697ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26981da177e4SLinus Torvalds lock->lk_new_open_seqid, 26991da177e4SLinus Torvalds &lock->lk_new_open_stateid, 27001da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 27013a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2702b59e3c0eSNeil Brown lock); 270337515177SNeilBrown if (status) 27041da177e4SLinus Torvalds goto out; 27053a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 27061da177e4SLinus Torvalds /* create lockowner and lock stateid */ 27071da177e4SLinus Torvalds fp = open_stp->st_file; 27081da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 27091da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 27101da177e4SLinus Torvalds &lock->v.new.owner); 27113e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27123e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27133e9e3dbeSNeilBrown * create new stateids)? */ 27141da177e4SLinus Torvalds status = nfserr_resource; 2715b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2716b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2717b59e3c0eSNeil Brown if (lock_sop == NULL) 27181da177e4SLinus Torvalds goto out; 2719b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27208a280510SJ. Bruce Fields if (lock_stp == NULL) 27211da177e4SLinus Torvalds goto out; 27221da177e4SLinus Torvalds } else { 27231da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2724ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 27251da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27261da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27271da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27283a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27291da177e4SLinus Torvalds if (status) 27301da177e4SLinus Torvalds goto out; 27313a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27321da177e4SLinus Torvalds } 27333a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27341da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27351da177e4SLinus Torvalds 27360dd395dcSNeilBrown status = nfserr_grace; 27370dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27380dd395dcSNeilBrown goto out; 27390dd395dcSNeilBrown status = nfserr_no_grace; 27400dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27410dd395dcSNeilBrown goto out; 27420dd395dcSNeilBrown 27431da177e4SLinus Torvalds locks_init_lock(&file_lock); 27441da177e4SLinus Torvalds switch (lock->lk_type) { 27451da177e4SLinus Torvalds case NFS4_READ_LT: 27461da177e4SLinus Torvalds case NFS4_READW_LT: 27471da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2748150b3934SMarc Eshel cmd = F_SETLK; 27491da177e4SLinus Torvalds break; 27501da177e4SLinus Torvalds case NFS4_WRITE_LT: 27511da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27521da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2753150b3934SMarc Eshel cmd = F_SETLK; 27541da177e4SLinus Torvalds break; 27551da177e4SLinus Torvalds default: 27561da177e4SLinus Torvalds status = nfserr_inval; 27571da177e4SLinus Torvalds goto out; 27581da177e4SLinus Torvalds } 2759b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27601da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27611da177e4SLinus Torvalds file_lock.fl_file = filp; 27621da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2763d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27641da177e4SLinus Torvalds 27651da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27661da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27671da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27681da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27691da177e4SLinus Torvalds else 27701da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27711da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27721da177e4SLinus Torvalds 27731da177e4SLinus Torvalds /* 27741da177e4SLinus Torvalds * Try to lock the file in the VFS. 27751da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27761da177e4SLinus Torvalds */ 27771da177e4SLinus Torvalds 2778eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2779eb76b3fdSAndy Adamson * locks_copy_lock: */ 2780150b3934SMarc Eshel locks_init_lock(&conflock); 2781fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2782b8dd7b9aSAl Viro switch (-err) { 27831da177e4SLinus Torvalds case 0: /* success! */ 27841da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27851da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27861da177e4SLinus Torvalds sizeof(stateid_t)); 2787b8dd7b9aSAl Viro status = 0; 2788eb76b3fdSAndy Adamson break; 2789eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2790eb76b3fdSAndy Adamson status = nfserr_denied; 2791eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2792eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2793eb76b3fdSAndy Adamson break; 27941da177e4SLinus Torvalds case (EDEADLK): 27951da177e4SLinus Torvalds status = nfserr_deadlock; 2796eb76b3fdSAndy Adamson break; 27971da177e4SLinus Torvalds default: 2798fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2799eb76b3fdSAndy Adamson status = nfserr_resource; 2800eb76b3fdSAndy Adamson break; 28011da177e4SLinus Torvalds } 28021da177e4SLinus Torvalds out: 28038a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 28048a280510SJ. Bruce Fields release_stateowner(lock_sop); 28053a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 28063a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2807a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2808f2327d9aSNeil Brown } 28091da177e4SLinus Torvalds nfs4_unlock_state(); 28101da177e4SLinus Torvalds return status; 28111da177e4SLinus Torvalds } 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds /* 28141da177e4SLinus Torvalds * LOCKT operation 28151da177e4SLinus Torvalds */ 2816b37ad28bSAl Viro __be32 2817ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2818ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 28191da177e4SLinus Torvalds { 28201da177e4SLinus Torvalds struct inode *inode; 28211da177e4SLinus Torvalds struct file file; 28221da177e4SLinus Torvalds struct file_lock file_lock; 2823fd85b817SMarc Eshel int error; 2824b37ad28bSAl Viro __be32 status; 28251da177e4SLinus Torvalds 28261da177e4SLinus Torvalds if (nfs4_in_grace()) 28271da177e4SLinus Torvalds return nfserr_grace; 28281da177e4SLinus Torvalds 28291da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28301da177e4SLinus Torvalds return nfserr_inval; 28311da177e4SLinus Torvalds 28321da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28331da177e4SLinus Torvalds nfs4_lock_state(); 28341da177e4SLinus Torvalds 28351da177e4SLinus Torvalds status = nfserr_stale_clientid; 2836849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28371da177e4SLinus Torvalds goto out; 28381da177e4SLinus Torvalds 2839ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2840849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28411da177e4SLinus Torvalds if (status == nfserr_symlink) 28421da177e4SLinus Torvalds status = nfserr_inval; 28431da177e4SLinus Torvalds goto out; 28441da177e4SLinus Torvalds } 28451da177e4SLinus Torvalds 2846ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28471da177e4SLinus Torvalds locks_init_lock(&file_lock); 28481da177e4SLinus Torvalds switch (lockt->lt_type) { 28491da177e4SLinus Torvalds case NFS4_READ_LT: 28501da177e4SLinus Torvalds case NFS4_READW_LT: 28511da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28521da177e4SLinus Torvalds break; 28531da177e4SLinus Torvalds case NFS4_WRITE_LT: 28541da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28551da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28561da177e4SLinus Torvalds break; 28571da177e4SLinus Torvalds default: 28581da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28591da177e4SLinus Torvalds status = nfserr_inval; 28601da177e4SLinus Torvalds goto out; 28611da177e4SLinus Torvalds } 28621da177e4SLinus Torvalds 28631da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28641da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28651da177e4SLinus Torvalds if (lockt->lt_stateowner) 28661da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28671da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28681da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2869d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28701da177e4SLinus Torvalds 28711da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28721da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28731da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28741da177e4SLinus Torvalds else 28751da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28761da177e4SLinus Torvalds 28771da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28781da177e4SLinus Torvalds 2879fd85b817SMarc Eshel /* vfs_test_lock uses the struct file _only_ to resolve the inode. 28801da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 2881fd85b817SMarc Eshel * file may not exist, pass vfs_test_lock a struct file with 28821da177e4SLinus Torvalds * only the dentry:inode set. 28831da177e4SLinus Torvalds */ 28841da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 2885ca364317SJ.Bruce Fields file.f_path.dentry = cstate->current_fh.fh_dentry; 28861da177e4SLinus Torvalds 28871da177e4SLinus Torvalds status = nfs_ok; 2888fd85b817SMarc Eshel error = vfs_test_lock(&file, &file_lock); 2889fd85b817SMarc Eshel if (error) { 2890fd85b817SMarc Eshel status = nfserrno(error); 2891fd85b817SMarc Eshel goto out; 2892fd85b817SMarc Eshel } 28939d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 28941da177e4SLinus Torvalds status = nfserr_denied; 28959d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 28961da177e4SLinus Torvalds } 28971da177e4SLinus Torvalds out: 28981da177e4SLinus Torvalds nfs4_unlock_state(); 28991da177e4SLinus Torvalds return status; 29001da177e4SLinus Torvalds } 29011da177e4SLinus Torvalds 2902b37ad28bSAl Viro __be32 2903ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2904a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 29051da177e4SLinus Torvalds { 29061da177e4SLinus Torvalds struct nfs4_stateid *stp; 29071da177e4SLinus Torvalds struct file *filp = NULL; 29081da177e4SLinus Torvalds struct file_lock file_lock; 2909b37ad28bSAl Viro __be32 status; 2910b8dd7b9aSAl Viro int err; 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29131da177e4SLinus Torvalds (long long) locku->lu_offset, 29141da177e4SLinus Torvalds (long long) locku->lu_length); 29151da177e4SLinus Torvalds 29161da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29171da177e4SLinus Torvalds return nfserr_inval; 29181da177e4SLinus Torvalds 29191da177e4SLinus Torvalds nfs4_lock_state(); 29201da177e4SLinus Torvalds 2921ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 29221da177e4SLinus Torvalds locku->lu_seqid, 29231da177e4SLinus Torvalds &locku->lu_stateid, 29241da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 29251da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29261da177e4SLinus Torvalds goto out; 29271da177e4SLinus Torvalds 29281da177e4SLinus Torvalds filp = stp->st_vfs_file; 29291da177e4SLinus Torvalds BUG_ON(!filp); 29301da177e4SLinus Torvalds locks_init_lock(&file_lock); 29311da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29321da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29331da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29341da177e4SLinus Torvalds file_lock.fl_file = filp; 29351da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2936d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29371da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29401da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29411da177e4SLinus Torvalds else 29421da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29431da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29441da177e4SLinus Torvalds 29451da177e4SLinus Torvalds /* 29461da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29471da177e4SLinus Torvalds */ 2948fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2949b8dd7b9aSAl Viro if (err) { 2950fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29511da177e4SLinus Torvalds goto out_nfserr; 29521da177e4SLinus Torvalds } 29531da177e4SLinus Torvalds /* 29541da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29551da177e4SLinus Torvalds */ 29561da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29571da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29581da177e4SLinus Torvalds 29591da177e4SLinus Torvalds out: 2960f2327d9aSNeil Brown if (locku->lu_stateowner) { 29611da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2962a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2963f2327d9aSNeil Brown } 29641da177e4SLinus Torvalds nfs4_unlock_state(); 29651da177e4SLinus Torvalds return status; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds out_nfserr: 2968b8dd7b9aSAl Viro status = nfserrno(err); 29691da177e4SLinus Torvalds goto out; 29701da177e4SLinus Torvalds } 29711da177e4SLinus Torvalds 29721da177e4SLinus Torvalds /* 29731da177e4SLinus Torvalds * returns 29741da177e4SLinus Torvalds * 1: locks held by lockowner 29751da177e4SLinus Torvalds * 0: no locks held by lockowner 29761da177e4SLinus Torvalds */ 29771da177e4SLinus Torvalds static int 29781da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29791da177e4SLinus Torvalds { 29801da177e4SLinus Torvalds struct file_lock **flpp; 29817eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 29821da177e4SLinus Torvalds int status = 0; 29831da177e4SLinus Torvalds 29841da177e4SLinus Torvalds lock_kernel(); 29851da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2986796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29871da177e4SLinus Torvalds status = 1; 29881da177e4SLinus Torvalds goto out; 29891da177e4SLinus Torvalds } 2990796dadfdSJ. Bruce Fields } 29911da177e4SLinus Torvalds out: 29921da177e4SLinus Torvalds unlock_kernel(); 29931da177e4SLinus Torvalds return status; 29941da177e4SLinus Torvalds } 29951da177e4SLinus Torvalds 2996b37ad28bSAl Viro __be32 2997b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 2998b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2999b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 30001da177e4SLinus Torvalds { 30011da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 30023e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 30033e9e3dbeSNeilBrown struct nfs4_stateid *stp; 30041da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 30053e9e3dbeSNeilBrown struct list_head matches; 30063e9e3dbeSNeilBrown int i; 3007b37ad28bSAl Viro __be32 status; 30081da177e4SLinus Torvalds 30091da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 30101da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30111da177e4SLinus Torvalds 30121da177e4SLinus Torvalds /* XXX check for lease expiration */ 30131da177e4SLinus Torvalds 30141da177e4SLinus Torvalds status = nfserr_stale_clientid; 3015849823c5SNeil Brown if (STALE_CLIENTID(clid)) 30161da177e4SLinus Torvalds return status; 30171da177e4SLinus Torvalds 30181da177e4SLinus Torvalds nfs4_lock_state(); 30191da177e4SLinus Torvalds 30201da177e4SLinus Torvalds status = nfserr_locks_held; 30213e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30223e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30233e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30243e9e3dbeSNeilBrown * data structures. */ 30253e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30263e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30273e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 30283e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 30293e9e3dbeSNeilBrown continue; 30303e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3031ea1da636SNeilBrown st_perstateowner) { 30323e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30331da177e4SLinus Torvalds goto out; 30343e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30353e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30363e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30371da177e4SLinus Torvalds } 30383e9e3dbeSNeilBrown } 30393e9e3dbeSNeilBrown } 30403e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30413e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30423e9e3dbeSNeilBrown * have been checked. */ 30431da177e4SLinus Torvalds status = nfs_ok; 30440fa822e4SNeilBrown while (!list_empty(&matches)) { 30450fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30460fa822e4SNeilBrown so_perclient); 30470fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30480fa822e4SNeilBrown * for openowners. */ 30490fa822e4SNeilBrown list_del(&sop->so_perclient); 30503e9e3dbeSNeilBrown release_stateowner(sop); 30511da177e4SLinus Torvalds } 30521da177e4SLinus Torvalds out: 30531da177e4SLinus Torvalds nfs4_unlock_state(); 30541da177e4SLinus Torvalds return status; 30551da177e4SLinus Torvalds } 30561da177e4SLinus Torvalds 30571da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3058a55370a3SNeilBrown alloc_reclaim(void) 30591da177e4SLinus Torvalds { 3060a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30611da177e4SLinus Torvalds } 30621da177e4SLinus Torvalds 3063c7b9a459SNeilBrown int 3064c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3065c7b9a459SNeilBrown { 3066c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3067c7b9a459SNeilBrown struct nfs4_client *clp; 3068c7b9a459SNeilBrown 3069c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3070c7b9a459SNeilBrown return clp ? 1 : 0; 3071c7b9a459SNeilBrown } 3072c7b9a459SNeilBrown 30731da177e4SLinus Torvalds /* 30741da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30751da177e4SLinus Torvalds */ 3076190e4fbfSNeilBrown int 3077190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30781da177e4SLinus Torvalds { 30791da177e4SLinus Torvalds unsigned int strhashval; 30801da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30811da177e4SLinus Torvalds 3082a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3083a55370a3SNeilBrown crp = alloc_reclaim(); 30841da177e4SLinus Torvalds if (!crp) 30851da177e4SLinus Torvalds return 0; 3086a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30871da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30881da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3089a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30901da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30911da177e4SLinus Torvalds return 1; 30921da177e4SLinus Torvalds } 30931da177e4SLinus Torvalds 30941da177e4SLinus Torvalds static void 30951da177e4SLinus Torvalds nfs4_release_reclaim(void) 30961da177e4SLinus Torvalds { 30971da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30981da177e4SLinus Torvalds int i; 30991da177e4SLinus Torvalds 31001da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31011da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 31021da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 31031da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 31041da177e4SLinus Torvalds list_del(&crp->cr_strhash); 31051da177e4SLinus Torvalds kfree(crp); 31061da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 31071da177e4SLinus Torvalds } 31081da177e4SLinus Torvalds } 31091da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 31101da177e4SLinus Torvalds } 31111da177e4SLinus Torvalds 31121da177e4SLinus Torvalds /* 31131da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3114fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31151da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31161da177e4SLinus Torvalds { 31171da177e4SLinus Torvalds unsigned int strhashval; 31181da177e4SLinus Torvalds struct nfs4_client *clp; 31191da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31201da177e4SLinus Torvalds 31211da177e4SLinus Torvalds 31221da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31231da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31241da177e4SLinus Torvalds if (clp == NULL) 31251da177e4SLinus Torvalds return NULL; 31261da177e4SLinus Torvalds 3127a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3128a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3129a55370a3SNeilBrown clp->cl_recdir); 31301da177e4SLinus Torvalds 31311da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3132a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31331da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3134a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31351da177e4SLinus Torvalds return crp; 31361da177e4SLinus Torvalds } 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds return NULL; 31391da177e4SLinus Torvalds } 31401da177e4SLinus Torvalds 31411da177e4SLinus Torvalds /* 31421da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31431da177e4SLinus Torvalds */ 3144b37ad28bSAl Viro __be32 31451da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31461da177e4SLinus Torvalds { 3147dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31481da177e4SLinus Torvalds } 31491da177e4SLinus Torvalds 3150ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31511da177e4SLinus Torvalds 3152ac4d8ff2SNeilBrown void 3153ac4d8ff2SNeilBrown nfs4_state_init(void) 31541da177e4SLinus Torvalds { 31551da177e4SLinus Torvalds int i; 31561da177e4SLinus Torvalds 31571da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31581da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31591da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31601da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31611da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31621da177e4SLinus Torvalds } 31631da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31641da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31651da177e4SLinus Torvalds } 31661da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31671da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31681da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31711da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31721da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31731da177e4SLinus Torvalds } 31741da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31751da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31761da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31771da177e4SLinus Torvalds } 31781da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31791da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31801da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31811da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3182ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3183ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3184ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3185ac4d8ff2SNeilBrown } 3186ac4d8ff2SNeilBrown 3187190e4fbfSNeilBrown static void 3188190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3189190e4fbfSNeilBrown { 3190190e4fbfSNeilBrown int status; 3191190e4fbfSNeilBrown 31920964a3d3SNeilBrown nfs4_lock_state(); 31930964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3194190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31950964a3d3SNeilBrown nfs4_unlock_state(); 3196190e4fbfSNeilBrown if (status) 3197190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3198190e4fbfSNeilBrown } 3199190e4fbfSNeilBrown 32009a8db97eSMarc Eshel unsigned long 32019a8db97eSMarc Eshel get_nfs4_grace_period(void) 32029a8db97eSMarc Eshel { 32039a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 32049a8db97eSMarc Eshel } 32059a8db97eSMarc Eshel 3206c2f1a551SMeelap Shah /* 3207c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3208c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3209c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3210c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3211c2f1a551SMeelap Shah * 3212c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3213c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3214c2f1a551SMeelap Shah */ 3215c2f1a551SMeelap Shah static void 3216c2f1a551SMeelap Shah set_max_delegations(void) 3217c2f1a551SMeelap Shah { 3218c2f1a551SMeelap Shah /* 3219c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3220c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3221c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3222c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3223c2f1a551SMeelap Shah */ 3224c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3225c2f1a551SMeelap Shah } 3226c2f1a551SMeelap Shah 3227ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3228ac4d8ff2SNeilBrown 3229ac4d8ff2SNeilBrown static void 3230ac4d8ff2SNeilBrown __nfs4_state_start(void) 3231ac4d8ff2SNeilBrown { 32329a8db97eSMarc Eshel unsigned long grace_time; 3233ac4d8ff2SNeilBrown 32341da177e4SLinus Torvalds boot_time = get_seconds(); 32359a8db97eSMarc Eshel grace_time = get_nfs_grace_period(); 3236d99a05adSNeilBrown lease_time = user_lease_time; 3237a76b4319SNeilBrown in_grace = 1; 32389a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32399a8db97eSMarc Eshel grace_time/HZ); 324058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32419a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3242c2f1a551SMeelap Shah set_max_delegations(); 32431da177e4SLinus Torvalds } 32441da177e4SLinus Torvalds 32451da177e4SLinus Torvalds int 324676a3550eSNeilBrown nfs4_state_start(void) 32471da177e4SLinus Torvalds { 32481da177e4SLinus Torvalds int status; 32491da177e4SLinus Torvalds 32501da177e4SLinus Torvalds if (nfs4_init) 32511da177e4SLinus Torvalds return 0; 32521da177e4SLinus Torvalds status = nfsd4_init_slabs(); 32531da177e4SLinus Torvalds if (status) 32541da177e4SLinus Torvalds return status; 3255190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 325676a3550eSNeilBrown __nfs4_state_start(); 32571da177e4SLinus Torvalds nfs4_init = 1; 32581da177e4SLinus Torvalds return 0; 32591da177e4SLinus Torvalds } 32601da177e4SLinus Torvalds 32611da177e4SLinus Torvalds int 32621da177e4SLinus Torvalds nfs4_in_grace(void) 32631da177e4SLinus Torvalds { 3264a76b4319SNeilBrown return in_grace; 32651da177e4SLinus Torvalds } 32661da177e4SLinus Torvalds 32671da177e4SLinus Torvalds time_t 32681da177e4SLinus Torvalds nfs4_lease_time(void) 32691da177e4SLinus Torvalds { 32701da177e4SLinus Torvalds return lease_time; 32711da177e4SLinus Torvalds } 32721da177e4SLinus Torvalds 32731da177e4SLinus Torvalds static void 32741da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32751da177e4SLinus Torvalds { 32761da177e4SLinus Torvalds int i; 32771da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32781da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32791da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32801da177e4SLinus Torvalds 32811da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32821da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32831da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32841da177e4SLinus Torvalds expire_client(clp); 32851da177e4SLinus Torvalds } 32861da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32871da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32881da177e4SLinus Torvalds expire_client(clp); 32891da177e4SLinus Torvalds } 32901da177e4SLinus Torvalds } 32911da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32921da177e4SLinus Torvalds spin_lock(&recall_lock); 32931da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32941da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32951da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32961da177e4SLinus Torvalds } 32971da177e4SLinus Torvalds spin_unlock(&recall_lock); 32981da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32991da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 33001da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 33011da177e4SLinus Torvalds unhash_delegation(dp); 33021da177e4SLinus Torvalds } 33031da177e4SLinus Torvalds 3304190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 33051da177e4SLinus Torvalds nfs4_init = 0; 33061da177e4SLinus Torvalds } 33071da177e4SLinus Torvalds 33081da177e4SLinus Torvalds void 33091da177e4SLinus Torvalds nfs4_state_shutdown(void) 33101da177e4SLinus Torvalds { 33115e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 33125e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 33131da177e4SLinus Torvalds nfs4_lock_state(); 33141da177e4SLinus Torvalds nfs4_release_reclaim(); 33151da177e4SLinus Torvalds __nfs4_state_shutdown(); 33161da177e4SLinus Torvalds nfsd4_free_slabs(); 33171da177e4SLinus Torvalds nfs4_unlock_state(); 33181da177e4SLinus Torvalds } 33191da177e4SLinus Torvalds 33200964a3d3SNeilBrown static void 33210964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33220964a3d3SNeilBrown { 33230964a3d3SNeilBrown nfs4_lock_state(); 33240964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33250964a3d3SNeilBrown nfs4_unlock_state(); 33260964a3d3SNeilBrown } 33270964a3d3SNeilBrown 33280964a3d3SNeilBrown /* 33290964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33300964a3d3SNeilBrown */ 33310964a3d3SNeilBrown int 33320964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33330964a3d3SNeilBrown { 33340964a3d3SNeilBrown int status; 33350964a3d3SNeilBrown struct nameidata nd; 33360964a3d3SNeilBrown 33370964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 33380964a3d3SNeilBrown if (status) 33390964a3d3SNeilBrown return status; 33400964a3d3SNeilBrown status = -ENOTDIR; 33410964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 33420964a3d3SNeilBrown nfs4_set_recdir(recdir); 33430964a3d3SNeilBrown status = 0; 33440964a3d3SNeilBrown } 33450964a3d3SNeilBrown path_release(&nd); 33460964a3d3SNeilBrown return status; 33470964a3d3SNeilBrown } 33480964a3d3SNeilBrown 33491da177e4SLinus Torvalds /* 33501da177e4SLinus Torvalds * Called when leasetime is changed. 33511da177e4SLinus Torvalds * 3352d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3353d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3354d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3355d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3356d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33571da177e4SLinus Torvalds */ 33581da177e4SLinus Torvalds void 33591da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33601da177e4SLinus Torvalds { 3361d99a05adSNeilBrown lock_kernel(); 3362d99a05adSNeilBrown user_lease_time = leasetime; 3363d99a05adSNeilBrown unlock_kernel(); 33641da177e4SLinus Torvalds } 3365