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> 52353ab6e9SIngo Molnar #include <linux/mutex.h> 531da177e4SLinus Torvalds 541da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 551da177e4SLinus Torvalds 561da177e4SLinus Torvalds /* Globals */ 571da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 58d99a05adSNeilBrown static time_t user_lease_time = 90; 59fd39ca9aSNeilBrown static time_t boot_time; 60a76b4319SNeilBrown static int in_grace = 1; 611da177e4SLinus Torvalds static u32 current_clientid = 1; 621da177e4SLinus Torvalds static u32 current_ownerid = 1; 631da177e4SLinus Torvalds static u32 current_fileid = 1; 641da177e4SLinus Torvalds static u32 current_delegid = 1; 651da177e4SLinus Torvalds static u32 nfs4_init; 66fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 67fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 68fd39ca9aSNeilBrown 69fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 70fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 711da177e4SLinus Torvalds 721da177e4SLinus Torvalds /* forward declarations */ 73fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 741da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 751da177e4SLinus Torvalds static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 760964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 770964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 781da177e4SLinus Torvalds 791da177e4SLinus Torvalds /* Locking: 801da177e4SLinus Torvalds * 81353ab6e9SIngo Molnar * client_mutex: 821da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 831da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 841da177e4SLinus Torvalds */ 85353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 861da177e4SLinus Torvalds 87fd39ca9aSNeilBrown static kmem_cache_t *stateowner_slab = NULL; 88fd39ca9aSNeilBrown static kmem_cache_t *file_slab = NULL; 89fd39ca9aSNeilBrown static kmem_cache_t *stateid_slab = NULL; 90fd39ca9aSNeilBrown static kmem_cache_t *deleg_slab = NULL; 91e60d4398SNeilBrown 921da177e4SLinus Torvalds void 931da177e4SLinus Torvalds nfs4_lock_state(void) 941da177e4SLinus Torvalds { 95353ab6e9SIngo Molnar mutex_lock(&client_mutex); 961da177e4SLinus Torvalds } 971da177e4SLinus Torvalds 981da177e4SLinus Torvalds void 991da177e4SLinus Torvalds nfs4_unlock_state(void) 1001da177e4SLinus Torvalds { 101353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1021da177e4SLinus Torvalds } 1031da177e4SLinus Torvalds 1041da177e4SLinus Torvalds static inline u32 1051da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1061da177e4SLinus Torvalds { 1071da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1081da177e4SLinus Torvalds 1091da177e4SLinus Torvalds u32 x = 0; 1101da177e4SLinus Torvalds while (nbytes--) { 1111da177e4SLinus Torvalds x *= 37; 1121da177e4SLinus Torvalds x += *cptr++; 1131da177e4SLinus Torvalds } 1141da177e4SLinus Torvalds return x; 1151da177e4SLinus Torvalds } 1161da177e4SLinus Torvalds 1171da177e4SLinus Torvalds /* forward declarations */ 1181da177e4SLinus Torvalds static void release_stateowner(struct nfs4_stateowner *sop); 1191da177e4SLinus Torvalds static void release_stateid(struct nfs4_stateid *stp, int flags); 1201da177e4SLinus Torvalds 1211da177e4SLinus Torvalds /* 1221da177e4SLinus Torvalds * Delegation state 1231da177e4SLinus Torvalds */ 1241da177e4SLinus Torvalds 1251da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 12634af946aSIngo Molnar static DEFINE_SPINLOCK(recall_lock); 1271da177e4SLinus Torvalds static struct list_head del_recall_lru; 1281da177e4SLinus Torvalds 12913cd2184SNeilBrown static void 13013cd2184SNeilBrown free_nfs4_file(struct kref *kref) 13113cd2184SNeilBrown { 13213cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13313cd2184SNeilBrown list_del(&fp->fi_hash); 13413cd2184SNeilBrown iput(fp->fi_inode); 13513cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13613cd2184SNeilBrown } 13713cd2184SNeilBrown 13813cd2184SNeilBrown static inline void 13913cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14013cd2184SNeilBrown { 14113cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14213cd2184SNeilBrown } 14313cd2184SNeilBrown 14413cd2184SNeilBrown static inline void 14513cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14613cd2184SNeilBrown { 14713cd2184SNeilBrown kref_get(&fi->fi_ref); 14813cd2184SNeilBrown } 14913cd2184SNeilBrown 150ef0f3390SNeilBrown static int num_delegations; 151ef0f3390SNeilBrown 152ef0f3390SNeilBrown /* 153ef0f3390SNeilBrown * Open owner state (share locks) 154ef0f3390SNeilBrown */ 155ef0f3390SNeilBrown 156ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 157ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 158ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 159ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 160ef0f3390SNeilBrown 161ef0f3390SNeilBrown #define ownerid_hashval(id) \ 162ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 163ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 164ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 165ef0f3390SNeilBrown 166ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 167ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 168ef0f3390SNeilBrown 169ef0f3390SNeilBrown /* hash table for nfs4_file */ 170ef0f3390SNeilBrown #define FILE_HASH_BITS 8 171ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 172ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 173ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 174ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 175ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 176ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 177ef0f3390SNeilBrown 178ef0f3390SNeilBrown #define file_hashval(x) \ 179ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 180ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 181ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 182ef0f3390SNeilBrown 183ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 184ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 185ef0f3390SNeilBrown 1861da177e4SLinus Torvalds static struct nfs4_delegation * 1871da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1881da177e4SLinus Torvalds { 1891da177e4SLinus Torvalds struct nfs4_delegation *dp; 1901da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1911da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1921da177e4SLinus Torvalds 1931da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 194ef0f3390SNeilBrown if (num_delegations > STATEID_HASH_SIZE * 4) 195ef0f3390SNeilBrown return NULL; 1965b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1975b2d21c1SNeilBrown if (dp == NULL) 1981da177e4SLinus Torvalds return dp; 199ef0f3390SNeilBrown num_delegations++; 200ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 201ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2021da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2031da177e4SLinus Torvalds dp->dl_client = clp; 20413cd2184SNeilBrown get_nfs4_file(fp); 2051da177e4SLinus Torvalds dp->dl_file = fp; 2061da177e4SLinus Torvalds dp->dl_flock = NULL; 2071da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2081da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2091da177e4SLinus Torvalds dp->dl_type = type; 2101da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2111da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2121da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2131da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2141da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2151da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2161da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2171da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 2181da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 2191da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 2201da177e4SLinus Torvalds dp->dl_time = 0; 2211da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 222ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 223ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2241da177e4SLinus Torvalds return dp; 2251da177e4SLinus Torvalds } 2261da177e4SLinus Torvalds 2271da177e4SLinus Torvalds void 2281da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2291da177e4SLinus Torvalds { 2301da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2311da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 23213cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2335b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 234ef0f3390SNeilBrown num_delegations--; 2351da177e4SLinus Torvalds } 2361da177e4SLinus Torvalds } 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2391da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2401da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2411da177e4SLinus Torvalds * fl_release_callback. 2421da177e4SLinus Torvalds */ 2431da177e4SLinus Torvalds static void 2441da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2451da177e4SLinus Torvalds { 2461da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2471da177e4SLinus Torvalds 2481da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2491da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2501da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2511da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 252c907132dSNeilBrown if (dp->dl_flock) 2531da177e4SLinus Torvalds setlease(filp, F_UNLCK, &dp->dl_flock); 2541da177e4SLinus Torvalds nfsd_close(filp); 2551da177e4SLinus Torvalds } 2561da177e4SLinus Torvalds 2571da177e4SLinus Torvalds /* Called under the state lock. */ 2581da177e4SLinus Torvalds static void 2591da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2601da177e4SLinus Torvalds { 261ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 262ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2631da177e4SLinus Torvalds spin_lock(&recall_lock); 2641da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2651da177e4SLinus Torvalds spin_unlock(&recall_lock); 2661da177e4SLinus Torvalds nfs4_close_delegation(dp); 2671da177e4SLinus Torvalds nfs4_put_delegation(dp); 2681da177e4SLinus Torvalds } 2691da177e4SLinus Torvalds 2701da177e4SLinus Torvalds /* 2711da177e4SLinus Torvalds * SETCLIENTID state 2721da177e4SLinus Torvalds */ 2731da177e4SLinus Torvalds 2741da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2751da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2761da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2771da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2781da177e4SLinus Torvalds 2791da177e4SLinus Torvalds #define clientid_hashval(id) \ 2801da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 281a55370a3SNeilBrown #define clientstr_hashval(name) \ 282a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2831da177e4SLinus Torvalds /* 2841da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2851da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2861da177e4SLinus Torvalds * 2871da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2881da177e4SLinus Torvalds * setclientid_confirmed info. 2891da177e4SLinus Torvalds * 2901da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2911da177e4SLinus Torvalds * setclientid info. 2921da177e4SLinus Torvalds * 2931da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2941da177e4SLinus Torvalds * for lease renewal. 2951da177e4SLinus Torvalds * 2961da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2971da177e4SLinus Torvalds * for last close replay. 2981da177e4SLinus Torvalds */ 2991da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3001da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3011da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3021da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3031da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3041da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3051da177e4SLinus Torvalds static struct list_head client_lru; 3061da177e4SLinus Torvalds static struct list_head close_lru; 3071da177e4SLinus Torvalds 3081da177e4SLinus Torvalds static inline void 3091da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 3101da177e4SLinus Torvalds { 3111da177e4SLinus Torvalds /* 3121da177e4SLinus Torvalds * Move client to the end to the LRU list. 3131da177e4SLinus Torvalds */ 3141da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 3151da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 3161da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3171da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 3181da177e4SLinus Torvalds clp->cl_time = get_seconds(); 3191da177e4SLinus Torvalds } 3201da177e4SLinus Torvalds 3211da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 3221da177e4SLinus Torvalds static int 3231da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 3241da177e4SLinus Torvalds { 3251da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 3261da177e4SLinus Torvalds return 0; 3271da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 3281da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 3291da177e4SLinus Torvalds return 1; 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds /* 3331da177e4SLinus Torvalds * XXX Should we use a slab cache ? 3341da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 3351da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 3361da177e4SLinus Torvalds */ 3371da177e4SLinus Torvalds static inline struct nfs4_client * 3381da177e4SLinus Torvalds alloc_client(struct xdr_netobj name) 3391da177e4SLinus Torvalds { 3401da177e4SLinus Torvalds struct nfs4_client *clp; 3411da177e4SLinus Torvalds 3421da177e4SLinus Torvalds if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 3431da177e4SLinus Torvalds memset(clp, 0, sizeof(*clp)); 3441da177e4SLinus Torvalds if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 3451da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3461da177e4SLinus Torvalds clp->cl_name.len = name.len; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds else { 3491da177e4SLinus Torvalds kfree(clp); 3501da177e4SLinus Torvalds clp = NULL; 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds } 3531da177e4SLinus Torvalds return clp; 3541da177e4SLinus Torvalds } 3551da177e4SLinus Torvalds 3561da177e4SLinus Torvalds static inline void 3571da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3581da177e4SLinus Torvalds { 3591da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3601da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3611da177e4SLinus Torvalds kfree(clp->cl_name.data); 3621da177e4SLinus Torvalds kfree(clp); 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds 3651da177e4SLinus Torvalds void 3661da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3671da177e4SLinus Torvalds { 3681da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3691da177e4SLinus Torvalds free_client(clp); 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds 3721da177e4SLinus Torvalds static void 3734e2fd495SNeilBrown shutdown_callback_client(struct nfs4_client *clp) 3744e2fd495SNeilBrown { 3754e2fd495SNeilBrown struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3764e2fd495SNeilBrown 3774e2fd495SNeilBrown /* shutdown rpc client, ending any outstanding recall rpcs */ 3784e2fd495SNeilBrown if (clnt) { 3794e2fd495SNeilBrown clp->cl_callback.cb_client = NULL; 3804e2fd495SNeilBrown rpc_shutdown_client(clnt); 3814e2fd495SNeilBrown rpciod_down(); 3824e2fd495SNeilBrown } 3834e2fd495SNeilBrown } 3844e2fd495SNeilBrown 3854e2fd495SNeilBrown static void 3861da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3871da177e4SLinus Torvalds { 3881da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3891da177e4SLinus Torvalds struct nfs4_delegation *dp; 3901da177e4SLinus Torvalds struct list_head reaplist; 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3931da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3941da177e4SLinus Torvalds 3954e2fd495SNeilBrown shutdown_callback_client(clp); 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 3981da177e4SLinus Torvalds spin_lock(&recall_lock); 399ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 400ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4011da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4021da177e4SLinus Torvalds dp->dl_flock); 403ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4041da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4051da177e4SLinus Torvalds } 4061da177e4SLinus Torvalds spin_unlock(&recall_lock); 4071da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4081da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4091da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4101da177e4SLinus Torvalds unhash_delegation(dp); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4131da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4141da177e4SLinus Torvalds list_del(&clp->cl_lru); 415ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 416ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4171da177e4SLinus Torvalds release_stateowner(sop); 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds put_nfs4_client(clp); 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds static struct nfs4_client * 423a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 4241da177e4SLinus Torvalds struct nfs4_client *clp; 4251da177e4SLinus Torvalds 4261da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 4271da177e4SLinus Torvalds goto out; 428a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4291da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4301da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4311da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4321da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 433ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 434ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4351da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4361da177e4SLinus Torvalds out: 4371da177e4SLinus Torvalds return clp; 4381da177e4SLinus Torvalds } 4391da177e4SLinus Torvalds 4401da177e4SLinus Torvalds static void 4411da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 4421da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 4431da177e4SLinus Torvalds } 4441da177e4SLinus Torvalds 4451da177e4SLinus Torvalds static void 4461da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4471da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4481da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4491da177e4SLinus Torvalds } 4501da177e4SLinus Torvalds 4511da177e4SLinus Torvalds static void 4521da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4551da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4561da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4571da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 460a55370a3SNeilBrown static inline int 461a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 462a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 4651da177e4SLinus Torvalds static int 4661da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4671da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds static int 4711da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4721da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4731da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds 4761da177e4SLinus Torvalds /* XXX what about NGROUP */ 4771da177e4SLinus Torvalds static int 4781da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4791da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4801da177e4SLinus Torvalds 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds static void 4841da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4851da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4861da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4871da177e4SLinus Torvalds } 4881da177e4SLinus Torvalds 4891da177e4SLinus Torvalds static void 4901da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4911da177e4SLinus Torvalds struct timespec tv; 4921da177e4SLinus Torvalds u32 * p; 4931da177e4SLinus Torvalds 4941da177e4SLinus Torvalds tv = CURRENT_TIME; 4951da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 4961da177e4SLinus Torvalds *p++ = tv.tv_sec; 4971da177e4SLinus Torvalds *p++ = tv.tv_nsec; 4981da177e4SLinus Torvalds } 4991da177e4SLinus Torvalds 5001da177e4SLinus Torvalds static int 5011da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds if (name.len == 0) 5041da177e4SLinus Torvalds return 0; 5051da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5061da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 5071da177e4SLinus Torvalds return 0; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds return 1; 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 512fd39ca9aSNeilBrown static void 5131da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5141da177e4SLinus Torvalds { 5151da177e4SLinus Torvalds unsigned int idhashval; 5161da177e4SLinus Torvalds 5171da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 5181da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5191da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 5201da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 5211da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5221da177e4SLinus Torvalds } 5231da177e4SLinus Torvalds 524fd39ca9aSNeilBrown static void 5251da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 5261da177e4SLinus Torvalds { 5271da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5281da177e4SLinus Torvalds unsigned int strhashval; 5291da177e4SLinus Torvalds 5301da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 5311da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 532f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 533a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 5341da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 5351da177e4SLinus Torvalds renew_client(clp); 5361da177e4SLinus Torvalds } 5371da177e4SLinus Torvalds 5381da177e4SLinus Torvalds static struct nfs4_client * 5391da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5401da177e4SLinus Torvalds { 5411da177e4SLinus Torvalds struct nfs4_client *clp; 5421da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5431da177e4SLinus Torvalds 5441da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 5451da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5461da177e4SLinus Torvalds return clp; 5471da177e4SLinus Torvalds } 5481da177e4SLinus Torvalds return NULL; 5491da177e4SLinus Torvalds } 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds static struct nfs4_client * 5521da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5531da177e4SLinus Torvalds { 5541da177e4SLinus Torvalds struct nfs4_client *clp; 5551da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5561da177e4SLinus Torvalds 5571da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5581da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5591da177e4SLinus Torvalds return clp; 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds return NULL; 5621da177e4SLinus Torvalds } 5631da177e4SLinus Torvalds 56428ce6054SNeilBrown static struct nfs4_client * 56528ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 56628ce6054SNeilBrown { 56728ce6054SNeilBrown struct nfs4_client *clp; 56828ce6054SNeilBrown 56928ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 57028ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 57128ce6054SNeilBrown return clp; 57228ce6054SNeilBrown } 57328ce6054SNeilBrown return NULL; 57428ce6054SNeilBrown } 57528ce6054SNeilBrown 57628ce6054SNeilBrown static struct nfs4_client * 57728ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 57828ce6054SNeilBrown { 57928ce6054SNeilBrown struct nfs4_client *clp; 58028ce6054SNeilBrown 58128ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 58228ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 58328ce6054SNeilBrown return clp; 58428ce6054SNeilBrown } 58528ce6054SNeilBrown return NULL; 58628ce6054SNeilBrown } 58728ce6054SNeilBrown 5881da177e4SLinus Torvalds /* a helper function for parse_callback */ 5891da177e4SLinus Torvalds static int 5901da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5911da177e4SLinus Torvalds { 5921da177e4SLinus Torvalds unsigned int len = *lenp; 5931da177e4SLinus Torvalds char *p = *addrp; 5941da177e4SLinus Torvalds int n = -1; 5951da177e4SLinus Torvalds char c; 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds for (;;) { 5981da177e4SLinus Torvalds if (!len) 5991da177e4SLinus Torvalds break; 6001da177e4SLinus Torvalds len--; 6011da177e4SLinus Torvalds c = *p++; 6021da177e4SLinus Torvalds if (c == '.') 6031da177e4SLinus Torvalds break; 6041da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6051da177e4SLinus Torvalds n = -1; 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds if (n < 0) 6091da177e4SLinus Torvalds n = 0; 6101da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6111da177e4SLinus Torvalds if (n > 255) { 6121da177e4SLinus Torvalds n = -1; 6131da177e4SLinus Torvalds break; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds } 6161da177e4SLinus Torvalds *lenp = len; 6171da177e4SLinus Torvalds *addrp = p; 6181da177e4SLinus Torvalds return n; 6191da177e4SLinus Torvalds } 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 622fd39ca9aSNeilBrown static int 6231da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 6241da177e4SLinus Torvalds { 6251da177e4SLinus Torvalds int temp = 0; 6261da177e4SLinus Torvalds u32 cbaddr = 0; 6271da177e4SLinus Torvalds u16 cbport = 0; 6281da177e4SLinus Torvalds u32 addrlen = addr_len; 6291da177e4SLinus Torvalds char *addr = addr_val; 6301da177e4SLinus Torvalds int i, shift; 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds /* ipaddress */ 6331da177e4SLinus Torvalds shift = 24; 6341da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 6351da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6361da177e4SLinus Torvalds return 0; 6371da177e4SLinus Torvalds } 6381da177e4SLinus Torvalds cbaddr |= (temp << shift); 6391da177e4SLinus Torvalds if (shift > 0) 6401da177e4SLinus Torvalds shift -= 8; 6411da177e4SLinus Torvalds } 6421da177e4SLinus Torvalds *cbaddrp = cbaddr; 6431da177e4SLinus Torvalds 6441da177e4SLinus Torvalds /* port */ 6451da177e4SLinus Torvalds shift = 8; 6461da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6471da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6481da177e4SLinus Torvalds return 0; 6491da177e4SLinus Torvalds } 6501da177e4SLinus Torvalds cbport |= (temp << shift); 6511da177e4SLinus Torvalds if (shift > 0) 6521da177e4SLinus Torvalds shift -= 8; 6531da177e4SLinus Torvalds } 6541da177e4SLinus Torvalds *cbportp = cbport; 6551da177e4SLinus Torvalds return 1; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds 658fd39ca9aSNeilBrown static void 6591da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6601da177e4SLinus Torvalds { 6611da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6621da177e4SLinus Torvalds 6631da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6641da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6651da177e4SLinus Torvalds goto out_err; 6661da177e4SLinus Torvalds 6671da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6681da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6691da177e4SLinus Torvalds goto out_err; 6701da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6711da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6721da177e4SLinus Torvalds return; 6731da177e4SLinus Torvalds out_err: 674849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6751da177e4SLinus Torvalds "will not receive delegations\n", 6761da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6771da177e4SLinus Torvalds 6781da177e4SLinus Torvalds return; 6791da177e4SLinus Torvalds } 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds /* 6821da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6831da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6841da177e4SLinus Torvalds * CASE0 - CASE4 below. 6851da177e4SLinus Torvalds * 6861da177e4SLinus Torvalds * NOTES: 6871da177e4SLinus Torvalds * callback information will be processed in a future patch 6881da177e4SLinus Torvalds * 6891da177e4SLinus Torvalds * an unconfirmed record is added when: 6901da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6911da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6921da177e4SLinus Torvalds * verifier, and clientid. 6931da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6941da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6951da177e4SLinus Torvalds * name and principal 6961da177e4SLinus Torvalds * 6971da177e4SLinus Torvalds * an unconfirmed record is replaced when: 6981da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 6991da177e4SLinus Torvalds * and an unconfirmed record is found with matching 7001da177e4SLinus Torvalds * name, principal, and with clientid and 7011da177e4SLinus Torvalds * confirm that does not match the confirmed record. 7021da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 7031da177e4SLinus Torvalds * principal. there is an unconfirmed record with 7041da177e4SLinus Torvalds * matching name, principal. 7051da177e4SLinus Torvalds * 7061da177e4SLinus Torvalds * an unconfirmed record is deleted when: 7071da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 7081da177e4SLinus Torvalds * and confirmed clientid. 7091da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 7101da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 7111da177e4SLinus Torvalds * as described above. 7121da177e4SLinus Torvalds * 7131da177e4SLinus Torvalds */ 7141da177e4SLinus Torvalds int 7151da177e4SLinus Torvalds nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 7161da177e4SLinus Torvalds { 7171da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 7181da177e4SLinus Torvalds struct xdr_netobj clname = { 7191da177e4SLinus Torvalds .len = setclid->se_namelen, 7201da177e4SLinus Torvalds .data = setclid->se_name, 7211da177e4SLinus Torvalds }; 7221da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7231da177e4SLinus Torvalds unsigned int strhashval; 72428ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 7251da177e4SLinus Torvalds int status; 726a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7271da177e4SLinus Torvalds 7281da177e4SLinus Torvalds if (!check_name(clname)) 72973aea4ecSNeil Brown return nfserr_inval; 7301da177e4SLinus Torvalds 731a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 732a55370a3SNeilBrown if (status) 73373aea4ecSNeil Brown return status; 734a55370a3SNeilBrown 7351da177e4SLinus Torvalds /* 7361da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7371da177e4SLinus Torvalds * We get here on a DRC miss. 7381da177e4SLinus Torvalds */ 7391da177e4SLinus Torvalds 740a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7411da177e4SLinus Torvalds 7421da177e4SLinus Torvalds nfs4_lock_state(); 74328ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 74428ce6054SNeilBrown if (conf) { 7451da177e4SLinus Torvalds /* 7461da177e4SLinus Torvalds * CASE 0: 7471da177e4SLinus Torvalds * clname match, confirmed, different principal 7481da177e4SLinus Torvalds * or different ip_address 7491da177e4SLinus Torvalds */ 7501da177e4SLinus Torvalds status = nfserr_clid_inuse; 75128ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 75228ce6054SNeilBrown || conf->cl_addr != ip_addr) { 7531da177e4SLinus Torvalds printk("NFSD: setclientid: string in use by client" 7541da177e4SLinus Torvalds "(clientid %08x/%08x)\n", 75528ce6054SNeilBrown conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); 7561da177e4SLinus Torvalds goto out; 7571da177e4SLinus Torvalds } 7581da177e4SLinus Torvalds } 75928ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7601da177e4SLinus Torvalds status = nfserr_resource; 7611da177e4SLinus Torvalds if (!conf) { 7621da177e4SLinus Torvalds /* 7631da177e4SLinus Torvalds * CASE 4: 7641da177e4SLinus Torvalds * placed first, because it is the normal case. 7651da177e4SLinus Torvalds */ 7661da177e4SLinus Torvalds if (unconf) 7671da177e4SLinus Torvalds expire_client(unconf); 768a55370a3SNeilBrown new = create_client(clname, dname); 769a55370a3SNeilBrown if (new == NULL) 7701da177e4SLinus Torvalds goto out; 7711da177e4SLinus Torvalds copy_verf(new, &clverifier); 7721da177e4SLinus Torvalds new->cl_addr = ip_addr; 7731da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7741da177e4SLinus Torvalds gen_clid(new); 7751da177e4SLinus Torvalds gen_confirm(new); 7761da177e4SLinus Torvalds gen_callback(new, setclid); 7771da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7781da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7791da177e4SLinus Torvalds /* 7801da177e4SLinus Torvalds * CASE 1: 7811da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7821da177e4SLinus Torvalds * verifier match: probable callback update 7831da177e4SLinus Torvalds * 7841da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7851da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7861da177e4SLinus Torvalds * 7871da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7881da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7891da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7901da177e4SLinus Torvalds * new cl_confirm 7911da177e4SLinus Torvalds */ 79231f4a6c1SNeilBrown if (unconf) { 79331f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 79431f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 79531f4a6c1SNeilBrown * This has the advantage that there is at most 79631f4a6c1SNeilBrown * one {*x***} in either list at any time. 79731f4a6c1SNeilBrown */ 7981da177e4SLinus Torvalds expire_client(unconf); 7991da177e4SLinus Torvalds } 800a55370a3SNeilBrown new = create_client(clname, dname); 801a55370a3SNeilBrown if (new == NULL) 8021da177e4SLinus Torvalds goto out; 8031da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 8041da177e4SLinus Torvalds new->cl_addr = ip_addr; 8051da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8061da177e4SLinus Torvalds copy_clid(new, conf); 8071da177e4SLinus Torvalds gen_confirm(new); 8081da177e4SLinus Torvalds gen_callback(new, setclid); 8091da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 8101da177e4SLinus Torvalds } else if (!unconf) { 8111da177e4SLinus Torvalds /* 8121da177e4SLinus Torvalds * CASE 2: 8131da177e4SLinus Torvalds * clname match, confirmed, principal match 8141da177e4SLinus Torvalds * verfier does not match 8151da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 8161da177e4SLinus Torvalds * using input clverifier, clname, and callback info 8171da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 8181da177e4SLinus Torvalds */ 819a55370a3SNeilBrown new = create_client(clname, dname); 820a55370a3SNeilBrown if (new == NULL) 8211da177e4SLinus Torvalds goto out; 8221da177e4SLinus Torvalds copy_verf(new,&clverifier); 8231da177e4SLinus Torvalds new->cl_addr = ip_addr; 8241da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8251da177e4SLinus Torvalds gen_clid(new); 8261da177e4SLinus Torvalds gen_confirm(new); 8271da177e4SLinus Torvalds gen_callback(new, setclid); 8281da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8291da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 8301da177e4SLinus Torvalds /* 8311da177e4SLinus Torvalds * CASE3: 8321da177e4SLinus Torvalds * confirmed found (name, principal match) 8331da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 8341da177e4SLinus Torvalds * 8351da177e4SLinus Torvalds * unconfirmed found (name match) 8361da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 8371da177e4SLinus Torvalds * 8381da177e4SLinus Torvalds * remove unconfirmed. 8391da177e4SLinus Torvalds * 8401da177e4SLinus Torvalds * create an unconfirmed nfs4_client 8411da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 8421da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 8431da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 8441da177e4SLinus Torvalds */ 8451da177e4SLinus Torvalds expire_client(unconf); 846a55370a3SNeilBrown new = create_client(clname, dname); 847a55370a3SNeilBrown if (new == NULL) 8481da177e4SLinus Torvalds goto out; 8491da177e4SLinus Torvalds copy_verf(new,&clverifier); 8501da177e4SLinus Torvalds new->cl_addr = ip_addr; 8511da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8521da177e4SLinus Torvalds gen_clid(new); 8531da177e4SLinus Torvalds gen_confirm(new); 8541da177e4SLinus Torvalds gen_callback(new, setclid); 8551da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8561da177e4SLinus Torvalds } else { 8571da177e4SLinus Torvalds /* No cases hit !!! */ 8581da177e4SLinus Torvalds status = nfserr_inval; 8591da177e4SLinus Torvalds goto out; 8601da177e4SLinus Torvalds 8611da177e4SLinus Torvalds } 8621da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8631da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8641da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8651da177e4SLinus Torvalds status = nfs_ok; 8661da177e4SLinus Torvalds out: 8671da177e4SLinus Torvalds nfs4_unlock_state(); 8681da177e4SLinus Torvalds return status; 8691da177e4SLinus Torvalds } 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds 8721da177e4SLinus Torvalds /* 8731da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8741da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8751da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8761da177e4SLinus Torvalds * 8771da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8781da177e4SLinus Torvalds */ 8791da177e4SLinus Torvalds int 8801da177e4SLinus Torvalds nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 8811da177e4SLinus Torvalds { 8821da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 88321ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8841da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8851da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 8861da177e4SLinus Torvalds int status; 8871da177e4SLinus Torvalds 8881da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8891da177e4SLinus Torvalds return nfserr_stale_clientid; 8901da177e4SLinus Torvalds /* 8911da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8921da177e4SLinus Torvalds * We get here on a DRC miss. 8931da177e4SLinus Torvalds */ 8941da177e4SLinus Torvalds 8951da177e4SLinus Torvalds nfs4_lock_state(); 89621ab45a4SNeilBrown 89721ab45a4SNeilBrown conf = find_confirmed_client(clid); 89821ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 89921ab45a4SNeilBrown 90022de4d83SNeilBrown status = nfserr_clid_inuse; 90121ab45a4SNeilBrown if (conf && conf->cl_addr != ip_addr) 9021da177e4SLinus Torvalds goto out; 90321ab45a4SNeilBrown if (unconf && unconf->cl_addr != ip_addr) 9041da177e4SLinus Torvalds goto out; 90521ab45a4SNeilBrown 9061da177e4SLinus Torvalds if ((conf && unconf) && 9071da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 9081da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 909a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 9101da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 9117c79f737SNeilBrown /* CASE 1: 9127c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 9137c79f737SNeilBrown * conf record that matches input clientid. 9147c79f737SNeilBrown * conf and unconf records match names, verifiers 9157c79f737SNeilBrown */ 9161da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 9171da177e4SLinus Torvalds status = nfserr_clid_inuse; 9181da177e4SLinus Torvalds else { 9191a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9201a69c179SNeilBrown * change request correctly. */ 921cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 92221ab45a4SNeilBrown gen_confirm(conf); 92346309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9241a69c179SNeilBrown expire_client(unconf); 9251da177e4SLinus Torvalds status = nfs_ok; 9261a69c179SNeilBrown 9271da177e4SLinus Torvalds } 9287c79f737SNeilBrown } else if ((conf && !unconf) || 9291da177e4SLinus Torvalds ((conf && unconf) && 9301da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 931a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 9327c79f737SNeilBrown /* CASE 2: 9337c79f737SNeilBrown * conf record that matches input clientid. 9347c79f737SNeilBrown * if unconf record matches input clientid, then 9357c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 9367c79f737SNeilBrown * conf record. 9377c79f737SNeilBrown */ 93821ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 9391da177e4SLinus Torvalds status = nfserr_clid_inuse; 94021ab45a4SNeilBrown else 9411da177e4SLinus Torvalds status = nfs_ok; 9427c79f737SNeilBrown } else if (!conf && unconf 9437c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 9441da177e4SLinus Torvalds /* CASE 3: 9451da177e4SLinus Torvalds * conf record not found. 9461da177e4SLinus Torvalds * unconf record found. 9471da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9481da177e4SLinus Torvalds */ 9491da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9501da177e4SLinus Torvalds status = nfserr_clid_inuse; 9511da177e4SLinus Torvalds } else { 9521a69c179SNeilBrown unsigned int hash = 9531a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9541a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9551a69c179SNeilBrown hash); 9561a69c179SNeilBrown if (conf) { 957c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9581a69c179SNeilBrown expire_client(conf); 9591a69c179SNeilBrown } 9601da177e4SLinus Torvalds move_to_confirmed(unconf); 96121ab45a4SNeilBrown conf = unconf; 9621a69c179SNeilBrown status = nfs_ok; 9631da177e4SLinus Torvalds } 9647c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9657c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9667c79f737SNeilBrown &confirm)))) { 9671da177e4SLinus Torvalds /* CASE 4: 9687c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9691da177e4SLinus Torvalds * match input confirm. 9707c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9711da177e4SLinus Torvalds * does not match input confirm. 9721da177e4SLinus Torvalds */ 9731da177e4SLinus Torvalds status = nfserr_stale_clientid; 9747c79f737SNeilBrown } else { 9751da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 97622de4d83SNeilBrown status = nfserr_clid_inuse; 97708e8987cSNeilBrown } 9781da177e4SLinus Torvalds out: 9791da177e4SLinus Torvalds if (!status) 98021ab45a4SNeilBrown nfsd4_probe_callback(conf); 9811da177e4SLinus Torvalds nfs4_unlock_state(); 9821da177e4SLinus Torvalds return status; 9831da177e4SLinus Torvalds } 9841da177e4SLinus Torvalds 9851da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9861da177e4SLinus Torvalds static inline struct nfs4_file * 9871da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9881da177e4SLinus Torvalds { 9891da177e4SLinus Torvalds struct nfs4_file *fp; 9901da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9911da177e4SLinus Torvalds 992e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 993e60d4398SNeilBrown if (fp) { 99413cd2184SNeilBrown kref_init(&fp->fi_ref); 9951da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9968beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9978beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9981da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9991da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 10001da177e4SLinus Torvalds fp->fi_id = current_fileid++; 10011da177e4SLinus Torvalds return fp; 10021da177e4SLinus Torvalds } 10031da177e4SLinus Torvalds return NULL; 10041da177e4SLinus Torvalds } 10051da177e4SLinus Torvalds 10061da177e4SLinus Torvalds static void 1007e60d4398SNeilBrown nfsd4_free_slab(kmem_cache_t **slab) 1008e60d4398SNeilBrown { 1009e60d4398SNeilBrown int status; 1010e60d4398SNeilBrown 1011e60d4398SNeilBrown if (*slab == NULL) 1012e60d4398SNeilBrown return; 1013e60d4398SNeilBrown status = kmem_cache_destroy(*slab); 1014e60d4398SNeilBrown *slab = NULL; 1015e60d4398SNeilBrown WARN_ON(status); 1016e60d4398SNeilBrown } 1017e60d4398SNeilBrown 1018e60d4398SNeilBrown static void 1019e60d4398SNeilBrown nfsd4_free_slabs(void) 1020e60d4398SNeilBrown { 1021e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1022e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10235ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10245b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1025e60d4398SNeilBrown } 10261da177e4SLinus Torvalds 10271da177e4SLinus Torvalds static int 10281da177e4SLinus Torvalds nfsd4_init_slabs(void) 10291da177e4SLinus Torvalds { 10301da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 10311da177e4SLinus Torvalds sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1032e60d4398SNeilBrown if (stateowner_slab == NULL) 1033e60d4398SNeilBrown goto out_nomem; 1034e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 1035e60d4398SNeilBrown sizeof(struct nfs4_file), 0, 0, NULL, NULL); 1036e60d4398SNeilBrown if (file_slab == NULL) 1037e60d4398SNeilBrown goto out_nomem; 10385ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 10395ac049acSNeilBrown sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); 10405ac049acSNeilBrown if (stateid_slab == NULL) 10415ac049acSNeilBrown goto out_nomem; 10425b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 10435b2d21c1SNeilBrown sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); 10445b2d21c1SNeilBrown if (deleg_slab == NULL) 10455b2d21c1SNeilBrown goto out_nomem; 1046e60d4398SNeilBrown return 0; 1047e60d4398SNeilBrown out_nomem: 1048e60d4398SNeilBrown nfsd4_free_slabs(); 10491da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10501da177e4SLinus Torvalds return -ENOMEM; 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds 10531da177e4SLinus Torvalds void 10541da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10551da177e4SLinus Torvalds { 10561da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10571da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10581da177e4SLinus Torvalds kfree(sop->so_owner.data); 10591da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10601da177e4SLinus Torvalds } 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10631da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10641da177e4SLinus Torvalds { 10651da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10681da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10691da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10701da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10711da177e4SLinus Torvalds kref_init(&sop->so_ref); 10721da177e4SLinus Torvalds return sop; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10751da177e4SLinus Torvalds } 10761da177e4SLinus Torvalds return NULL; 10771da177e4SLinus Torvalds } 10781da177e4SLinus Torvalds 10791da177e4SLinus Torvalds static struct nfs4_stateowner * 10801da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10811da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10821da177e4SLinus Torvalds struct nfs4_replay *rp; 10831da177e4SLinus Torvalds unsigned int idhashval; 10841da177e4SLinus Torvalds 10851da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10861da177e4SLinus Torvalds return NULL; 10871da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10881da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10891da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10901da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1091ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1092ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10931da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10941da177e4SLinus Torvalds sop->so_time = 0; 10951da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10961da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1097ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10981da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10991da177e4SLinus Torvalds sop->so_id = current_ownerid++; 11001da177e4SLinus Torvalds sop->so_client = clp; 11011da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 11021da177e4SLinus Torvalds sop->so_confirmed = 0; 11031da177e4SLinus Torvalds rp = &sop->so_replay; 1104de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11051da177e4SLinus Torvalds rp->rp_buflen = 0; 11061da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11071da177e4SLinus Torvalds return sop; 11081da177e4SLinus Torvalds } 11091da177e4SLinus Torvalds 11101da177e4SLinus Torvalds static void 11111da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11121da177e4SLinus Torvalds { 11131da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11141da177e4SLinus Torvalds 1115ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1116ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1117ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1118ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11191da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11201da177e4SLinus Torvalds release_stateowner(lock_sop); 11211da177e4SLinus Torvalds } 11221da177e4SLinus Torvalds } 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds static void 11251da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11261da177e4SLinus Torvalds { 11271da177e4SLinus Torvalds struct nfs4_stateid *stp; 11281da177e4SLinus Torvalds 11291da177e4SLinus Torvalds list_del(&sop->so_idhash); 11301da177e4SLinus Torvalds list_del(&sop->so_strhash); 11316fa305deSNeilBrown if (sop->so_is_open_owner) 11321da177e4SLinus Torvalds list_del(&sop->so_perclient); 1133ea1da636SNeilBrown list_del(&sop->so_perstateid); 1134ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1135ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1136ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11371da177e4SLinus Torvalds if (sop->so_is_open_owner) 11381da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11391da177e4SLinus Torvalds else 11401da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11411da177e4SLinus Torvalds } 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds static void 11451da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11461da177e4SLinus Torvalds { 11471da177e4SLinus Torvalds unhash_stateowner(sop); 11481da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11491da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11501da177e4SLinus Torvalds } 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds static inline void 11531da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11541da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11551da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11561da177e4SLinus Torvalds 11571da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1158ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1159ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11601da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11611da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1162ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11638beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11641da177e4SLinus Torvalds stp->st_stateowner = sop; 116513cd2184SNeilBrown get_nfs4_file(fp); 11661da177e4SLinus Torvalds stp->st_file = fp; 11671da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11681da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11691da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11701da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11711da177e4SLinus Torvalds stp->st_access_bmap = 0; 11721da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11731da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11741da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11754c4cd222SNeilBrown stp->st_openstp = NULL; 11761da177e4SLinus Torvalds } 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds static void 11791da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11801da177e4SLinus Torvalds { 11811da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11821da177e4SLinus Torvalds 11831da177e4SLinus Torvalds list_del(&stp->st_hash); 11841da177e4SLinus Torvalds list_del(&stp->st_perfile); 1185ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11861da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11871da177e4SLinus Torvalds release_stateid_lockowners(stp); 11881da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11891da177e4SLinus Torvalds nfsd_close(filp); 11901da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11911da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 119213cd2184SNeilBrown put_nfs4_file(stp->st_file); 11935ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11941da177e4SLinus Torvalds } 11951da177e4SLinus Torvalds 1196fd39ca9aSNeilBrown static void 11971da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11981da177e4SLinus Torvalds { 11991da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 12001da177e4SLinus Torvalds 1201358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 12021da177e4SLinus Torvalds sop->so_time = get_seconds(); 12031da177e4SLinus Torvalds } 12041da177e4SLinus Torvalds 12051da177e4SLinus Torvalds static int 12061da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 12071da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 12081da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 12091da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 12101da177e4SLinus Torvalds } 12111da177e4SLinus Torvalds 12121da177e4SLinus Torvalds static struct nfs4_stateowner * 12131da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12141da177e4SLinus Torvalds { 12151da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12181da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12191da177e4SLinus Torvalds return so; 12201da177e4SLinus Torvalds } 12211da177e4SLinus Torvalds return NULL; 12221da177e4SLinus Torvalds } 12231da177e4SLinus Torvalds 12241da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12251da177e4SLinus Torvalds static struct nfs4_file * 12261da177e4SLinus Torvalds find_file(struct inode *ino) 12271da177e4SLinus Torvalds { 12281da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12291da177e4SLinus Torvalds struct nfs4_file *fp; 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 123213cd2184SNeilBrown if (fp->fi_inode == ino) { 123313cd2184SNeilBrown get_nfs4_file(fp); 12341da177e4SLinus Torvalds return fp; 12351da177e4SLinus Torvalds } 123613cd2184SNeilBrown } 12371da177e4SLinus Torvalds return NULL; 12381da177e4SLinus Torvalds } 12391da177e4SLinus Torvalds 12401da177e4SLinus Torvalds #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) 12411da177e4SLinus Torvalds #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) 12421da177e4SLinus Torvalds 1243fd39ca9aSNeilBrown static void 12441da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12451da177e4SLinus Torvalds int i; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds *access = 0; 12481da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12491da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12501da177e4SLinus Torvalds *access |= i; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 1254fd39ca9aSNeilBrown static void 12551da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12561da177e4SLinus Torvalds int i; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds *deny = 0; 12591da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12601da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12611da177e4SLinus Torvalds *deny |= i ; 12621da177e4SLinus Torvalds } 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds static int 12661da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12671da177e4SLinus Torvalds unsigned int access, deny; 12681da177e4SLinus Torvalds 12691da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12701da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12711da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12721da177e4SLinus Torvalds return 0; 12731da177e4SLinus Torvalds return 1; 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds 12761da177e4SLinus Torvalds /* 12771da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12781da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12791da177e4SLinus Torvalds */ 1280fd39ca9aSNeilBrown static int 12811da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12841da177e4SLinus Torvalds struct nfs4_file *fp; 12851da177e4SLinus Torvalds struct nfs4_stateid *stp; 128613cd2184SNeilBrown int ret; 12871da177e4SLinus Torvalds 12881da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds fp = find_file(ino); 129113cd2184SNeilBrown if (!fp) 129213cd2184SNeilBrown return nfs_ok; 1293b700949bSNeilBrown ret = nfserr_locked; 12941da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12958beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12961da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12971da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 129813cd2184SNeilBrown goto out; 12991da177e4SLinus Torvalds } 130013cd2184SNeilBrown ret = nfs_ok; 130113cd2184SNeilBrown out: 130213cd2184SNeilBrown put_nfs4_file(fp); 130313cd2184SNeilBrown return ret; 13041da177e4SLinus Torvalds } 13051da177e4SLinus Torvalds 13061da177e4SLinus Torvalds static inline void 13071da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13081da177e4SLinus Torvalds { 13091da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13101da177e4SLinus Torvalds put_write_access(filp->f_dentry->d_inode); 13111da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13121da177e4SLinus Torvalds } 13131da177e4SLinus Torvalds } 13141da177e4SLinus Torvalds 13151da177e4SLinus Torvalds /* 13161da177e4SLinus Torvalds * Recall a delegation 13171da177e4SLinus Torvalds */ 13181da177e4SLinus Torvalds static int 13191da177e4SLinus Torvalds do_recall(void *__dp) 13201da177e4SLinus Torvalds { 13211da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13221da177e4SLinus Torvalds 13231da177e4SLinus Torvalds daemonize("nfsv4-recall"); 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13261da177e4SLinus Torvalds return 0; 13271da177e4SLinus Torvalds } 13281da177e4SLinus Torvalds 13291da177e4SLinus Torvalds /* 13301da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13311da177e4SLinus Torvalds * by the lease (file_lock) 13321da177e4SLinus Torvalds * 13331da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13341da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13351da177e4SLinus Torvalds * lease. 13361da177e4SLinus Torvalds */ 13371da177e4SLinus Torvalds static 13381da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13391da177e4SLinus Torvalds { 13401da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13411da177e4SLinus Torvalds struct task_struct *t; 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13441da177e4SLinus Torvalds if (!dp) 13451da177e4SLinus Torvalds return; 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13481da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13491da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13501da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13511da177e4SLinus Torvalds * it's safe to take a reference: */ 13521da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds spin_lock(&recall_lock); 13551da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13561da177e4SLinus Torvalds spin_unlock(&recall_lock); 13571da177e4SLinus Torvalds 13581da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13591da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13621da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13651da177e4SLinus Torvalds if (IS_ERR(t)) { 13661da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13671da177e4SLinus Torvalds 13681da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13691da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13701da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13711da177e4SLinus Torvalds nfs4_put_delegation(dp); 13721da177e4SLinus Torvalds } 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds 13751da177e4SLinus Torvalds /* 13761da177e4SLinus Torvalds * The file_lock is being reapd. 13771da177e4SLinus Torvalds * 13781da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13791da177e4SLinus Torvalds */ 13801da177e4SLinus Torvalds static 13811da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13821da177e4SLinus Torvalds { 13831da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13841da177e4SLinus Torvalds 13851da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13861da177e4SLinus Torvalds 13871da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13881da177e4SLinus Torvalds return; 13891da177e4SLinus Torvalds dp->dl_flock = NULL; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds /* 13931da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13941da177e4SLinus Torvalds * 13951da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held. 13961da177e4SLinus Torvalds */ 13971da177e4SLinus Torvalds static 13981da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13991da177e4SLinus Torvalds { 14001da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14011da177e4SLinus Torvalds 14021da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14031da177e4SLinus Torvalds if (!dp) 14041da177e4SLinus Torvalds return; 14051da177e4SLinus Torvalds dp->dl_flock = new; 14061da177e4SLinus Torvalds } 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds /* 14091da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held 14101da177e4SLinus Torvalds */ 14111da177e4SLinus Torvalds static 14121da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14131da177e4SLinus Torvalds { 14141da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14151da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14161da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14171da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14201da177e4SLinus Torvalds return 0; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14231da177e4SLinus Torvalds } 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds 14261da177e4SLinus Torvalds static 14271da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14281da177e4SLinus Torvalds { 14291da177e4SLinus Torvalds if (arg & F_UNLCK) 14301da177e4SLinus Torvalds return lease_modify(onlist, arg); 14311da177e4SLinus Torvalds else 14321da177e4SLinus Torvalds return -EAGAIN; 14331da177e4SLinus Torvalds } 14341da177e4SLinus Torvalds 1435fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14361da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14371da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14381da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14391da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14401da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14411da177e4SLinus Torvalds }; 14421da177e4SLinus Torvalds 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds int 14451da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14461da177e4SLinus Torvalds { 14471da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14481da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14491da177e4SLinus Torvalds unsigned int strhashval; 14501da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14511da177e4SLinus Torvalds 14521da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14530f442aa2SJ. Bruce Fields return nfserr_inval; 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14561da177e4SLinus Torvalds return nfserr_stale_clientid; 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14591da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14601da177e4SLinus Torvalds open->op_stateowner = sop; 14610f442aa2SJ. Bruce Fields if (!sop) { 14620f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14630f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14640f442aa2SJ. Bruce Fields if (clp == NULL) 14650f442aa2SJ. Bruce Fields return nfserr_expired; 14660f442aa2SJ. Bruce Fields goto renew; 14670f442aa2SJ. Bruce Fields } 1468ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14690f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1470ae8b6253SJ. Bruce Fields clp = sop->so_client; 1471ae8b6253SJ. Bruce Fields release_stateowner(sop); 14720f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1473ae8b6253SJ. Bruce Fields goto renew; 14740f442aa2SJ. Bruce Fields } 14750f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14761da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 14771da177e4SLinus Torvalds return NFSERR_REPLAY_ME; 14781da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14791da177e4SLinus Torvalds * that we don't even have replay data saved! 14801da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14811da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14821da177e4SLinus Torvalds * fail again for the same reason. 14831da177e4SLinus Torvalds */ 14840f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14851da177e4SLinus Torvalds goto renew; 14861da177e4SLinus Torvalds } 14870f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14880f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14890f442aa2SJ. Bruce Fields renew: 14900f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14911da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14921da177e4SLinus Torvalds if (sop == NULL) 14930f442aa2SJ. Bruce Fields return nfserr_resource; 14941da177e4SLinus Torvalds open->op_stateowner = sop; 14950f442aa2SJ. Bruce Fields } 14960f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14971da177e4SLinus Torvalds renew_client(sop->so_client); 14980f442aa2SJ. Bruce Fields return nfs_ok; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds 15014a6e43e6SNeilBrown static inline int 15024a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15034a6e43e6SNeilBrown { 15044a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15054a6e43e6SNeilBrown return nfserr_openmode; 15064a6e43e6SNeilBrown else 15074a6e43e6SNeilBrown return nfs_ok; 15084a6e43e6SNeilBrown } 15094a6e43e6SNeilBrown 151052f4fb43SNeilBrown static struct nfs4_delegation * 151152f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 151252f4fb43SNeilBrown { 151352f4fb43SNeilBrown struct nfs4_delegation *dp; 151452f4fb43SNeilBrown 1515ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 151652f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 151752f4fb43SNeilBrown return dp; 151852f4fb43SNeilBrown } 151952f4fb43SNeilBrown return NULL; 152052f4fb43SNeilBrown } 152152f4fb43SNeilBrown 1522c44c5eebSNeilBrown static int 1523567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1524567d9829SNeilBrown struct nfs4_delegation **dp) 1525567d9829SNeilBrown { 1526567d9829SNeilBrown int flags; 1527c44c5eebSNeilBrown int status = nfserr_bad_stateid; 1528567d9829SNeilBrown 1529567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1530567d9829SNeilBrown if (*dp == NULL) 1531c44c5eebSNeilBrown goto out; 1532567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1533567d9829SNeilBrown RD_STATE : WR_STATE; 1534567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1535567d9829SNeilBrown if (status) 1536567d9829SNeilBrown *dp = NULL; 1537c44c5eebSNeilBrown out: 1538c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1539c44c5eebSNeilBrown return nfs_ok; 1540c44c5eebSNeilBrown if (status) 1541c44c5eebSNeilBrown return status; 1542c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1543c44c5eebSNeilBrown return nfs_ok; 1544567d9829SNeilBrown } 1545567d9829SNeilBrown 15461da177e4SLinus Torvalds static int 15471da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15481da177e4SLinus Torvalds { 15491da177e4SLinus Torvalds struct nfs4_stateid *local; 15501da177e4SLinus Torvalds int status = nfserr_share_denied; 15511da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15521da177e4SLinus Torvalds 15538beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15541da177e4SLinus Torvalds /* ignore lock owners */ 15551da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15561da177e4SLinus Torvalds continue; 15571da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15581da177e4SLinus Torvalds if (local->st_stateowner == sop) 15591da177e4SLinus Torvalds *stpp = local; 15601da177e4SLinus Torvalds /* check for conflicting share reservations */ 15611da177e4SLinus Torvalds if (!test_share(local, open)) 15621da177e4SLinus Torvalds goto out; 15631da177e4SLinus Torvalds } 15641da177e4SLinus Torvalds status = 0; 15651da177e4SLinus Torvalds out: 15661da177e4SLinus Torvalds return status; 15671da177e4SLinus Torvalds } 15681da177e4SLinus Torvalds 15695ac049acSNeilBrown static inline struct nfs4_stateid * 15705ac049acSNeilBrown nfs4_alloc_stateid(void) 15715ac049acSNeilBrown { 15725ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15735ac049acSNeilBrown } 15745ac049acSNeilBrown 15751da177e4SLinus Torvalds static int 15761da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1577567d9829SNeilBrown struct nfs4_delegation *dp, 15781da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15791da177e4SLinus Torvalds { 15801da177e4SLinus Torvalds struct nfs4_stateid *stp; 15811da177e4SLinus Torvalds 15825ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15831da177e4SLinus Torvalds if (stp == NULL) 15841da177e4SLinus Torvalds return nfserr_resource; 15851da177e4SLinus Torvalds 1586567d9829SNeilBrown if (dp) { 1587567d9829SNeilBrown get_file(dp->dl_vfs_file); 1588567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1589567d9829SNeilBrown } else { 1590567d9829SNeilBrown int status; 1591567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1592567d9829SNeilBrown &stp->st_vfs_file); 15931da177e4SLinus Torvalds if (status) { 15941da177e4SLinus Torvalds if (status == nfserr_dropit) 15951da177e4SLinus Torvalds status = nfserr_jukebox; 15965ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15971da177e4SLinus Torvalds return status; 15981da177e4SLinus Torvalds } 1599567d9829SNeilBrown } 16001da177e4SLinus Torvalds *stpp = stp; 16011da177e4SLinus Torvalds return 0; 16021da177e4SLinus Torvalds } 16031da177e4SLinus Torvalds 16041da177e4SLinus Torvalds static inline int 16051da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16061da177e4SLinus Torvalds struct nfsd4_open *open) 16071da177e4SLinus Torvalds { 16081da177e4SLinus Torvalds struct iattr iattr = { 16091da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16101da177e4SLinus Torvalds .ia_size = 0, 16111da177e4SLinus Torvalds }; 16121da177e4SLinus Torvalds if (!open->op_truncate) 16131da177e4SLinus Torvalds return 0; 16141da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16159246585aSAl Viro return nfserr_inval; 16161da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16171da177e4SLinus Torvalds } 16181da177e4SLinus Torvalds 16191da177e4SLinus Torvalds static int 16201da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16211da177e4SLinus Torvalds { 16221da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16231da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 16246c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 16251da177e4SLinus Torvalds int status; 16261da177e4SLinus Torvalds 16271da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16286c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16296c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16301da177e4SLinus Torvalds 16316c26d08fSJ. Bruce Fields if (new_writer) { 16321da177e4SLinus Torvalds status = get_write_access(inode); 16331da177e4SLinus Torvalds if (status) 16341da177e4SLinus Torvalds return nfserrno(status); 16356c26d08fSJ. Bruce Fields } 16361da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16371da177e4SLinus Torvalds if (status) { 16386c26d08fSJ. Bruce Fields if (new_writer) 16391da177e4SLinus Torvalds put_write_access(inode); 16401da177e4SLinus Torvalds return status; 16411da177e4SLinus Torvalds } 16421da177e4SLinus Torvalds /* remember the open */ 16436c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16441da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16451da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds return nfs_ok; 16481da177e4SLinus Torvalds } 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds 16511da177e4SLinus Torvalds static void 165237515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16531da177e4SLinus Torvalds { 16541da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1655c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16561da177e4SLinus Torvalds } 16571da177e4SLinus Torvalds 16581da177e4SLinus Torvalds /* 16591da177e4SLinus Torvalds * Attempt to hand out a delegation. 16601da177e4SLinus Torvalds */ 16611da177e4SLinus Torvalds static void 16621da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16631da177e4SLinus Torvalds { 16641da177e4SLinus Torvalds struct nfs4_delegation *dp; 16651da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16661da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16671da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16681da177e4SLinus Torvalds int status, flag = 0; 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16717b190fecSNeilBrown open->op_recall = 0; 16727b190fecSNeilBrown switch (open->op_claim_type) { 16737b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16747b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16757b190fecSNeilBrown open->op_recall = 1; 16767b190fecSNeilBrown flag = open->op_delegate_type; 16777b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16781da177e4SLinus Torvalds goto out; 16797b190fecSNeilBrown break; 16807b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16817b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16827b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16837b190fecSNeilBrown if (nfs4_in_grace()) 16847b190fecSNeilBrown goto out; 16857b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16867b190fecSNeilBrown goto out; 16871da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16881da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16891da177e4SLinus Torvalds else 16901da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16917b190fecSNeilBrown break; 16927b190fecSNeilBrown default: 16937b190fecSNeilBrown goto out; 16947b190fecSNeilBrown } 16951da177e4SLinus Torvalds 16961da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16971da177e4SLinus Torvalds if (dp == NULL) { 16981da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16991da177e4SLinus Torvalds goto out; 17001da177e4SLinus Torvalds } 17011da177e4SLinus Torvalds locks_init_lock(&fl); 17021da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17031da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17041da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17051da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17061da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17071da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17081da177e4SLinus Torvalds 17091da177e4SLinus Torvalds /* setlease checks to see if delegation should be handed out. 17101da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17111da177e4SLinus Torvalds */ 17121da177e4SLinus Torvalds if ((status = setlease(stp->st_vfs_file, 17131da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17141da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1715c907132dSNeilBrown unhash_delegation(dp); 17161da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17171da177e4SLinus Torvalds goto out; 17181da177e4SLinus Torvalds } 17191da177e4SLinus Torvalds 17201da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17211da177e4SLinus Torvalds 17221da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17231da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17241da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17251da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17261da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17271da177e4SLinus Torvalds out: 17287b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17297b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17307b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17317b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17321da177e4SLinus Torvalds open->op_delegate_type = flag; 17331da177e4SLinus Torvalds } 17341da177e4SLinus Torvalds 17351da177e4SLinus Torvalds /* 17361da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17371da177e4SLinus Torvalds */ 17381da177e4SLinus Torvalds int 17391da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17401da177e4SLinus Torvalds { 17411da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17421da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17431da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1744567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 17451da177e4SLinus Torvalds int status; 17461da177e4SLinus Torvalds 17471da177e4SLinus Torvalds status = nfserr_inval; 17481da177e4SLinus Torvalds if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) 17491da177e4SLinus Torvalds goto out; 17501da177e4SLinus Torvalds /* 17511da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17521da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17531da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17541da177e4SLinus Torvalds */ 17551da177e4SLinus Torvalds fp = find_file(ino); 17561da177e4SLinus Torvalds if (fp) { 17571da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17581da177e4SLinus Torvalds goto out; 1759c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1760c44c5eebSNeilBrown if (status) 1761c44c5eebSNeilBrown goto out; 17621da177e4SLinus Torvalds } else { 1763c44c5eebSNeilBrown status = nfserr_bad_stateid; 1764c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1765c44c5eebSNeilBrown goto out; 17661da177e4SLinus Torvalds status = nfserr_resource; 17671da177e4SLinus Torvalds fp = alloc_init_file(ino); 17681da177e4SLinus Torvalds if (fp == NULL) 17691da177e4SLinus Torvalds goto out; 17701da177e4SLinus Torvalds } 17711da177e4SLinus Torvalds 17721da177e4SLinus Torvalds /* 17731da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17741da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17751da177e4SLinus Torvalds */ 17761da177e4SLinus Torvalds if (stp) { 17771da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17781da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17791da177e4SLinus Torvalds if (status) 17801da177e4SLinus Torvalds goto out; 1781444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17821da177e4SLinus Torvalds } else { 17831da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17841da177e4SLinus Torvalds int flags = 0; 17851da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17861da177e4SLinus Torvalds flags = MAY_WRITE; 17871da177e4SLinus Torvalds else 17881da177e4SLinus Torvalds flags = MAY_READ; 1789567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1790567d9829SNeilBrown if (status) 17911da177e4SLinus Torvalds goto out; 17921da177e4SLinus Torvalds init_stateid(stp, fp, open); 17931da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17941da177e4SLinus Torvalds if (status) { 17951da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17961da177e4SLinus Torvalds goto out; 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds } 17991da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18001da177e4SLinus Torvalds 18011da177e4SLinus Torvalds /* 18021da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18031da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18041da177e4SLinus Torvalds */ 18051da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18061da177e4SLinus Torvalds 18071da177e4SLinus Torvalds status = nfs_ok; 18081da177e4SLinus Torvalds 18091da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18101da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18111da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18121da177e4SLinus Torvalds out: 181313cd2184SNeilBrown if (fp) 181413cd2184SNeilBrown put_nfs4_file(fp); 181537515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 181637515177SNeilBrown nfs4_set_claim_prev(open); 18171da177e4SLinus Torvalds /* 18181da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18191da177e4SLinus Torvalds */ 18201da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18211da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18221da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18231da177e4SLinus Torvalds 18241da177e4SLinus Torvalds return status; 18251da177e4SLinus Torvalds } 18261da177e4SLinus Torvalds 182758da282bSNeilBrown static struct workqueue_struct *laundry_wq; 18281da177e4SLinus Torvalds static struct work_struct laundromat_work; 18291da177e4SLinus Torvalds static void laundromat_main(void *); 18301da177e4SLinus Torvalds static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 18311da177e4SLinus Torvalds 18321da177e4SLinus Torvalds int 18331da177e4SLinus Torvalds nfsd4_renew(clientid_t *clid) 18341da177e4SLinus Torvalds { 18351da177e4SLinus Torvalds struct nfs4_client *clp; 18361da177e4SLinus Torvalds int status; 18371da177e4SLinus Torvalds 18381da177e4SLinus Torvalds nfs4_lock_state(); 18391da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18401da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18411da177e4SLinus Torvalds status = nfserr_stale_clientid; 18421da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18431da177e4SLinus Torvalds goto out; 18441da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18451da177e4SLinus Torvalds status = nfserr_expired; 18461da177e4SLinus Torvalds if (clp == NULL) { 18471da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18481da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18491da177e4SLinus Torvalds goto out; 18501da177e4SLinus Torvalds } 18511da177e4SLinus Torvalds renew_client(clp); 18521da177e4SLinus Torvalds status = nfserr_cb_path_down; 1853ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18541da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18551da177e4SLinus Torvalds goto out; 18561da177e4SLinus Torvalds status = nfs_ok; 18571da177e4SLinus Torvalds out: 18581da177e4SLinus Torvalds nfs4_unlock_state(); 18591da177e4SLinus Torvalds return status; 18601da177e4SLinus Torvalds } 18611da177e4SLinus Torvalds 1862a76b4319SNeilBrown static void 1863a76b4319SNeilBrown end_grace(void) 1864a76b4319SNeilBrown { 1865a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1866c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1867a76b4319SNeilBrown in_grace = 0; 1868a76b4319SNeilBrown } 1869a76b4319SNeilBrown 1870fd39ca9aSNeilBrown static time_t 18711da177e4SLinus Torvalds nfs4_laundromat(void) 18721da177e4SLinus Torvalds { 18731da177e4SLinus Torvalds struct nfs4_client *clp; 18741da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18751da177e4SLinus Torvalds struct nfs4_delegation *dp; 18761da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18771da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18781da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18791da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18801da177e4SLinus Torvalds 18811da177e4SLinus Torvalds nfs4_lock_state(); 18821da177e4SLinus Torvalds 18831da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1884a76b4319SNeilBrown if (in_grace) 1885a76b4319SNeilBrown end_grace(); 18861da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18871da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18881da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18891da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18901da177e4SLinus Torvalds if (clientid_val > t) 18911da177e4SLinus Torvalds clientid_val = t; 18921da177e4SLinus Torvalds break; 18931da177e4SLinus Torvalds } 18941da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18951da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1896c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18971da177e4SLinus Torvalds expire_client(clp); 18981da177e4SLinus Torvalds } 18991da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19001da177e4SLinus Torvalds spin_lock(&recall_lock); 19011da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19021da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19031da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19041da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19051da177e4SLinus Torvalds if (test_val > u) 19061da177e4SLinus Torvalds test_val = u; 19071da177e4SLinus Torvalds break; 19081da177e4SLinus Torvalds } 19091da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19101da177e4SLinus Torvalds dp, dp->dl_flock); 19111da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19121da177e4SLinus Torvalds } 19131da177e4SLinus Torvalds spin_unlock(&recall_lock); 19141da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19151da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19161da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19171da177e4SLinus Torvalds unhash_delegation(dp); 19181da177e4SLinus Torvalds } 19191da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19201da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19211da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19221da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19231da177e4SLinus Torvalds u = sop->so_time - cutoff; 19241da177e4SLinus Torvalds if (test_val > u) 19251da177e4SLinus Torvalds test_val = u; 19261da177e4SLinus Torvalds break; 19271da177e4SLinus Torvalds } 19281da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19291da177e4SLinus Torvalds sop->so_id); 1930358dd55aSNeilBrown release_stateowner(sop); 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19331da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19341da177e4SLinus Torvalds nfs4_unlock_state(); 19351da177e4SLinus Torvalds return clientid_val; 19361da177e4SLinus Torvalds } 19371da177e4SLinus Torvalds 19381da177e4SLinus Torvalds void 19391da177e4SLinus Torvalds laundromat_main(void *not_used) 19401da177e4SLinus Torvalds { 19411da177e4SLinus Torvalds time_t t; 19421da177e4SLinus Torvalds 19431da177e4SLinus Torvalds t = nfs4_laundromat(); 19441da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 194558da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19461da177e4SLinus Torvalds } 19471da177e4SLinus Torvalds 1948fd39ca9aSNeilBrown static struct nfs4_stateowner * 1949f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1950f8816512SNeilBrown { 19511da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19521da177e4SLinus Torvalds 19531da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19541da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19551da177e4SLinus Torvalds if (local->so_id == st_id) 19561da177e4SLinus Torvalds return local; 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds } 19591da177e4SLinus Torvalds return NULL; 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds static inline int 19631da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19641da177e4SLinus Torvalds { 19651da177e4SLinus Torvalds return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 19661da177e4SLinus Torvalds } 19671da177e4SLinus Torvalds 19681da177e4SLinus Torvalds static int 19691da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19701da177e4SLinus Torvalds { 19711da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19721da177e4SLinus Torvalds return 0; 1973849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19741da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19751da177e4SLinus Torvalds stateid->si_generation); 19761da177e4SLinus Torvalds return 1; 19771da177e4SLinus Torvalds } 19781da177e4SLinus Torvalds 19791da177e4SLinus Torvalds static inline int 19801da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19811da177e4SLinus Torvalds { 19821da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19831da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19841da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19851da177e4SLinus Torvalds } 19861da177e4SLinus Torvalds 19871da177e4SLinus Torvalds static inline int 19881da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19891da177e4SLinus Torvalds { 19901da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19911da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19921da177e4SLinus Torvalds } 19931da177e4SLinus Torvalds 19941da177e4SLinus Torvalds static 19951da177e4SLinus Torvalds int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19961da177e4SLinus Torvalds { 19971da177e4SLinus Torvalds int status = nfserr_openmode; 19981da177e4SLinus Torvalds 19991da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20001da177e4SLinus Torvalds goto out; 20011da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20021da177e4SLinus Torvalds goto out; 20031da177e4SLinus Torvalds status = nfs_ok; 20041da177e4SLinus Torvalds out: 20051da177e4SLinus Torvalds return status; 20061da177e4SLinus Torvalds } 20071da177e4SLinus Torvalds 20081da177e4SLinus Torvalds static inline int 20091da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20101da177e4SLinus Torvalds { 20111da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20121da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20131da177e4SLinus Torvalds return nfserr_bad_stateid; 20141da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20151da177e4SLinus Torvalds return nfs_ok; 20161da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20171da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20181da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20191da177e4SLinus Torvalds return nfserr_grace; 20201da177e4SLinus Torvalds } else if (flags & WR_STATE) 20211da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20221da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20231da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20241da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20251da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20261da177e4SLinus Torvalds } 20271da177e4SLinus Torvalds 20281da177e4SLinus Torvalds /* 20291da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20301da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20311da177e4SLinus Torvalds */ 20321da177e4SLinus Torvalds static inline int 20331da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20341da177e4SLinus Torvalds { 20351da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 20361da177e4SLinus Torvalds && MANDATORY_LOCK(inode); 20371da177e4SLinus Torvalds } 20381da177e4SLinus Torvalds 20391da177e4SLinus Torvalds /* 20401da177e4SLinus Torvalds * Checks for stateid operations 20411da177e4SLinus Torvalds */ 20421da177e4SLinus Torvalds int 20431da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20441da177e4SLinus Torvalds { 20451da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20461da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20471da177e4SLinus Torvalds stateid_t *stidp; 20481da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20491da177e4SLinus Torvalds int status; 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20521da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20531da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20541da177e4SLinus Torvalds if (filpp) 20551da177e4SLinus Torvalds *filpp = NULL; 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20581da177e4SLinus Torvalds return nfserr_grace; 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20611da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds /* STALE STATEID */ 20641da177e4SLinus Torvalds status = nfserr_stale_stateid; 20651da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20661da177e4SLinus Torvalds goto out; 20671da177e4SLinus Torvalds 20681da177e4SLinus Torvalds /* BAD STATEID */ 20691da177e4SLinus Torvalds status = nfserr_bad_stateid; 20701da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20711da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20721da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20731da177e4SLinus Torvalds if (nfs4_in_grace()) 20741da177e4SLinus Torvalds status = nfserr_grace; 20751da177e4SLinus Torvalds goto out; 20761da177e4SLinus Torvalds } 20771da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20781da177e4SLinus Torvalds } else { /* open or lock stateid */ 20791da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20801da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20811da177e4SLinus Torvalds if (nfs4_in_grace()) 20821da177e4SLinus Torvalds status = nfserr_grace; 20831da177e4SLinus Torvalds goto out; 20841da177e4SLinus Torvalds } 20851da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20861da177e4SLinus Torvalds goto out; 20871da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20881da177e4SLinus Torvalds goto out; 20891da177e4SLinus Torvalds stidp = &stp->st_stateid; 20901da177e4SLinus Torvalds } 20911da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 20921da177e4SLinus Torvalds goto out; 20931da177e4SLinus Torvalds 20941da177e4SLinus Torvalds /* OLD STATEID */ 20951da177e4SLinus Torvalds status = nfserr_old_stateid; 20961da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 20971da177e4SLinus Torvalds goto out; 20981da177e4SLinus Torvalds if (stp) { 20991da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 21001da177e4SLinus Torvalds goto out; 21011da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21021da177e4SLinus Torvalds if (filpp) 21031da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21041da177e4SLinus Torvalds } else if (dp) { 21051da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 21061da177e4SLinus Torvalds goto out; 21071da177e4SLinus Torvalds renew_client(dp->dl_client); 21081da177e4SLinus Torvalds if (flags & DELEG_RET) 21091da177e4SLinus Torvalds unhash_delegation(dp); 21101da177e4SLinus Torvalds if (filpp) 21111da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21121da177e4SLinus Torvalds } 21131da177e4SLinus Torvalds status = nfs_ok; 21141da177e4SLinus Torvalds out: 21151da177e4SLinus Torvalds return status; 21161da177e4SLinus Torvalds } 21171da177e4SLinus Torvalds 21184c4cd222SNeilBrown static inline int 21194c4cd222SNeilBrown setlkflg (int type) 21204c4cd222SNeilBrown { 21214c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21224c4cd222SNeilBrown RD_STATE : WR_STATE; 21234c4cd222SNeilBrown } 21241da177e4SLinus Torvalds 21251da177e4SLinus Torvalds /* 21261da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21271da177e4SLinus Torvalds */ 2128fd39ca9aSNeilBrown static int 21294c4cd222SNeilBrown 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) 21301da177e4SLinus Torvalds { 21311da177e4SLinus Torvalds struct nfs4_stateid *stp; 21321da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21331da177e4SLinus Torvalds 21341da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21351da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21361da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21371da177e4SLinus Torvalds stateid->si_generation); 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds *stpp = NULL; 21401da177e4SLinus Torvalds *sopp = NULL; 21411da177e4SLinus Torvalds 21421da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21431da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21443a4f98bbSNeilBrown return nfserr_bad_stateid; 21451da177e4SLinus Torvalds } 21461da177e4SLinus Torvalds 21471da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21483a4f98bbSNeilBrown return nfserr_stale_stateid; 21491da177e4SLinus Torvalds /* 21501da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21511da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21521da177e4SLinus Torvalds * number is incorrect. 21531da177e4SLinus Torvalds */ 2154f8816512SNeilBrown stp = find_stateid(stateid, flags); 2155f8816512SNeilBrown if (stp == NULL) { 2156f8816512SNeilBrown /* 2157f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2158f8816512SNeilBrown * a replayed close: 2159f8816512SNeilBrown */ 2160f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2161f8816512SNeilBrown if (sop == NULL) 2162f8816512SNeilBrown return nfserr_bad_stateid; 2163f8816512SNeilBrown *sopp = sop; 2164f8816512SNeilBrown goto check_replay; 2165f8816512SNeilBrown } 21661da177e4SLinus Torvalds 21674c4cd222SNeilBrown if (lock) { 21681da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21694c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21701da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21714c4cd222SNeilBrown int lkflg = 0; 21724c4cd222SNeilBrown int status; 21731da177e4SLinus Torvalds 21744c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21754c4cd222SNeilBrown 21764c4cd222SNeilBrown if (lock->lk_is_new) { 21771da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21783a4f98bbSNeilBrown return nfserr_bad_stateid; 21791da177e4SLinus Torvalds if (!cmp_clid(&clp->cl_clientid, lockclid)) 21803a4f98bbSNeilBrown return nfserr_bad_stateid; 21814c4cd222SNeilBrown /* stp is the open stateid */ 21824c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21834c4cd222SNeilBrown if (status) 21844c4cd222SNeilBrown return status; 21854c4cd222SNeilBrown } else { 21864c4cd222SNeilBrown /* stp is the lock stateid */ 21874c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21884c4cd222SNeilBrown if (status) 21894c4cd222SNeilBrown return status; 21904c4cd222SNeilBrown } 21914c4cd222SNeilBrown 21921da177e4SLinus Torvalds } 21931da177e4SLinus Torvalds 21941da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 21951da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21963a4f98bbSNeilBrown return nfserr_bad_stateid; 21971da177e4SLinus Torvalds } 21981da177e4SLinus Torvalds 21991da177e4SLinus Torvalds *stpp = stp; 22001da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 22011da177e4SLinus Torvalds 22021da177e4SLinus Torvalds /* 22031da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22041da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22051da177e4SLinus Torvalds * generation number wraparound. 22061da177e4SLinus Torvalds */ 2207bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22081da177e4SLinus Torvalds goto check_replay; 22091da177e4SLinus Torvalds 22103a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22113a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: expected" 22123a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22133a4f98bbSNeilBrown return nfserr_bad_stateid; 22141da177e4SLinus Torvalds } 22153a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22163a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: stateowner not" 22173a4f98bbSNeilBrown " confirmed yet!\n"); 22183a4f98bbSNeilBrown return nfserr_bad_stateid; 22191da177e4SLinus Torvalds } 22201da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22211da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22223a4f98bbSNeilBrown return nfserr_bad_stateid; 22231da177e4SLinus Torvalds } 22241da177e4SLinus Torvalds 22251da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22261da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: old stateid!\n"); 22273a4f98bbSNeilBrown return nfserr_old_stateid; 22281da177e4SLinus Torvalds } 222952fd004eSNeilBrown renew_client(sop->so_client); 22303a4f98bbSNeilBrown return nfs_ok; 22311da177e4SLinus Torvalds 22321da177e4SLinus Torvalds check_replay: 2233bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2234849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22351da177e4SLinus Torvalds /* indicate replay to calling function */ 22363a4f98bbSNeilBrown return NFSERR_REPLAY_ME; 22371da177e4SLinus Torvalds } 22383a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22393a4f98bbSNeilBrown sop->so_seqid, seqid); 22403a4f98bbSNeilBrown *sopp = NULL; 22413a4f98bbSNeilBrown return nfserr_bad_seqid; 22421da177e4SLinus Torvalds } 22431da177e4SLinus Torvalds 22441da177e4SLinus Torvalds int 2245f2327d9aSNeil Brown nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner) 22461da177e4SLinus Torvalds { 22471da177e4SLinus Torvalds int status; 22481da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22491da177e4SLinus Torvalds struct nfs4_stateid *stp; 22501da177e4SLinus Torvalds 22511da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 22521da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 22531da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 22541da177e4SLinus Torvalds 22551da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 22561da177e4SLinus Torvalds goto out; 22571da177e4SLinus Torvalds 22581da177e4SLinus Torvalds nfs4_lock_state(); 22591da177e4SLinus Torvalds 22601da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 22611da177e4SLinus Torvalds &oc->oc_req_stateid, 22621da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22631da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22641da177e4SLinus Torvalds goto out; 22651da177e4SLinus Torvalds 22661da177e4SLinus Torvalds sop = oc->oc_stateowner; 22671da177e4SLinus Torvalds sop->so_confirmed = 1; 22681da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22691da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22701da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22711da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22721da177e4SLinus Torvalds stp->st_stateid.si_boot, 22731da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22741da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22751da177e4SLinus Torvalds stp->st_stateid.si_generation); 2276c7b9a459SNeilBrown 2277c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22781da177e4SLinus Torvalds out: 2279f2327d9aSNeil Brown if (oc->oc_stateowner) { 22801da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2281f2327d9aSNeil Brown *replay_owner = oc->oc_stateowner; 2282f2327d9aSNeil Brown } 22831da177e4SLinus Torvalds nfs4_unlock_state(); 22841da177e4SLinus Torvalds return status; 22851da177e4SLinus Torvalds } 22861da177e4SLinus Torvalds 22871da177e4SLinus Torvalds 22881da177e4SLinus Torvalds /* 22891da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22901da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22911da177e4SLinus Torvalds */ 22921da177e4SLinus Torvalds static void 22931da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22941da177e4SLinus Torvalds { 22951da177e4SLinus Torvalds int i; 22961da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22971da177e4SLinus Torvalds if ((i & access) != i) 22981da177e4SLinus Torvalds __clear_bit(i, bmap); 22991da177e4SLinus Torvalds } 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds 23021da177e4SLinus Torvalds static void 23031da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23041da177e4SLinus Torvalds { 23051da177e4SLinus Torvalds int i; 23061da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23071da177e4SLinus Torvalds if ((i & deny) != i) 23081da177e4SLinus Torvalds __clear_bit(i, bmap); 23091da177e4SLinus Torvalds } 23101da177e4SLinus Torvalds } 23111da177e4SLinus Torvalds 23121da177e4SLinus Torvalds int 2313f2327d9aSNeil Brown nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) 23141da177e4SLinus Torvalds { 23151da177e4SLinus Torvalds int status; 23161da177e4SLinus Torvalds struct nfs4_stateid *stp; 23171da177e4SLinus Torvalds unsigned int share_access; 23181da177e4SLinus Torvalds 23191da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 23201da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23211da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) 23241da177e4SLinus Torvalds return nfserr_inval; 23251da177e4SLinus Torvalds 23261da177e4SLinus Torvalds nfs4_lock_state(); 23271da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 23281da177e4SLinus Torvalds &od->od_stateid, 23291da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23301da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23311da177e4SLinus Torvalds goto out; 23321da177e4SLinus Torvalds 23331da177e4SLinus Torvalds status = nfserr_inval; 23341da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23351da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23361da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23371da177e4SLinus Torvalds goto out; 23381da177e4SLinus Torvalds } 23391da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23401da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23411da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23421da177e4SLinus Torvalds goto out; 23431da177e4SLinus Torvalds } 23441da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23451da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23461da177e4SLinus Torvalds share_access & ~od->od_share_access); 23471da177e4SLinus Torvalds 23481da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23491da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23501da177e4SLinus Torvalds 23511da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23521da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23531da177e4SLinus Torvalds status = nfs_ok; 23541da177e4SLinus Torvalds out: 2355f2327d9aSNeil Brown if (od->od_stateowner) { 23561da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2357f2327d9aSNeil Brown *replay_owner = od->od_stateowner; 2358f2327d9aSNeil Brown } 23591da177e4SLinus Torvalds nfs4_unlock_state(); 23601da177e4SLinus Torvalds return status; 23611da177e4SLinus Torvalds } 23621da177e4SLinus Torvalds 23631da177e4SLinus Torvalds /* 23641da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23651da177e4SLinus Torvalds */ 23661da177e4SLinus Torvalds int 2367f2327d9aSNeil Brown nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) 23681da177e4SLinus Torvalds { 23691da177e4SLinus Torvalds int status; 23701da177e4SLinus Torvalds struct nfs4_stateid *stp; 23711da177e4SLinus Torvalds 23721da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 23731da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23741da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23751da177e4SLinus Torvalds 23761da177e4SLinus Torvalds nfs4_lock_state(); 23771da177e4SLinus Torvalds /* check close_lru for replay */ 23781da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 23791da177e4SLinus Torvalds &close->cl_stateid, 23801da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23811da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23821da177e4SLinus Torvalds goto out; 23831da177e4SLinus Torvalds status = nfs_ok; 23841da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23851da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23861da177e4SLinus Torvalds 238704ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 238804ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 238904ef5954SJ. Bruce Fields 239004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 239104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 239204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 239304ef5954SJ. Bruce Fields */ 239404ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 239504ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23961da177e4SLinus Torvalds out: 2397f2327d9aSNeil Brown if (close->cl_stateowner) { 23981da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2399f2327d9aSNeil Brown *replay_owner = close->cl_stateowner; 2400f2327d9aSNeil Brown } 24011da177e4SLinus Torvalds nfs4_unlock_state(); 24021da177e4SLinus Torvalds return status; 24031da177e4SLinus Torvalds } 24041da177e4SLinus Torvalds 24051da177e4SLinus Torvalds int 24061da177e4SLinus Torvalds nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 24071da177e4SLinus Torvalds { 24081da177e4SLinus Torvalds int status; 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 24111da177e4SLinus Torvalds goto out; 24121da177e4SLinus Torvalds 24131da177e4SLinus Torvalds nfs4_lock_state(); 24141da177e4SLinus Torvalds status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 24151da177e4SLinus Torvalds nfs4_unlock_state(); 24161da177e4SLinus Torvalds out: 24171da177e4SLinus Torvalds return status; 24181da177e4SLinus Torvalds } 24191da177e4SLinus Torvalds 24201da177e4SLinus Torvalds 24211da177e4SLinus Torvalds /* 24221da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24231da177e4SLinus Torvalds */ 24241da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24251da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24261da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24271da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24281da177e4SLinus Torvalds 24291da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24301da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24311da177e4SLinus Torvalds 24321da177e4SLinus Torvalds static inline unsigned int 24331da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24341da177e4SLinus Torvalds struct xdr_netobj *ownername) 24351da177e4SLinus Torvalds { 24361da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24371da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24381da177e4SLinus Torvalds & LOCK_HASH_MASK; 24391da177e4SLinus Torvalds } 24401da177e4SLinus Torvalds 24411da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24421da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24431da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24441da177e4SLinus Torvalds 2445fd39ca9aSNeilBrown static struct nfs4_stateid * 24461da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24471da177e4SLinus Torvalds { 24481da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24491da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24501da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24511da177e4SLinus Torvalds unsigned int hashval; 24521da177e4SLinus Torvalds 24531da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24541da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24551da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24561da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24571da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24581da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24591da177e4SLinus Torvalds return local; 24601da177e4SLinus Torvalds } 24611da177e4SLinus Torvalds } 24621da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24631da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24641da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24651da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24661da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24671da177e4SLinus Torvalds return local; 24681da177e4SLinus Torvalds } 2469849823c5SNeil Brown } 24701da177e4SLinus Torvalds return NULL; 24711da177e4SLinus Torvalds } 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds static struct nfs4_delegation * 24741da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24751da177e4SLinus Torvalds { 247613cd2184SNeilBrown struct nfs4_file *fp; 247713cd2184SNeilBrown struct nfs4_delegation *dl; 24781da177e4SLinus Torvalds 24791da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24801da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24811da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24821da177e4SLinus Torvalds 24831da177e4SLinus Torvalds fp = find_file(ino); 248413cd2184SNeilBrown if (!fp) 24851da177e4SLinus Torvalds return NULL; 248613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 248713cd2184SNeilBrown put_nfs4_file(fp); 248813cd2184SNeilBrown return dl; 24891da177e4SLinus Torvalds } 24901da177e4SLinus Torvalds 24911da177e4SLinus Torvalds /* 24921da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24931da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24941da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24951da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24961da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24971da177e4SLinus Torvalds * the VFS, but this is a very deep change! 24981da177e4SLinus Torvalds */ 24991da177e4SLinus Torvalds static inline void 25001da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25011da177e4SLinus Torvalds { 25021da177e4SLinus Torvalds if (lock->fl_start < 0) 25031da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25041da177e4SLinus Torvalds if (lock->fl_end < 0) 25051da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25061da177e4SLinus Torvalds } 25071da177e4SLinus Torvalds 2508d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2509d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2510e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2511d5b9026aSNeilBrown }; 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds static inline void 25141da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25151da177e4SLinus Torvalds { 2516d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2517d5b9026aSNeilBrown unsigned int hval; 25181da177e4SLinus Torvalds 2519d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2520d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2521d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25221da177e4SLinus Torvalds kref_get(&sop->so_ref); 25231da177e4SLinus Torvalds deny->ld_sop = sop; 25241da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2525d5b9026aSNeilBrown } else { 2526d5b9026aSNeilBrown deny->ld_sop = NULL; 2527d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2528d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25291da177e4SLinus Torvalds } 25301da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25311da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25321da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25331da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25341da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25351da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25361da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25371da177e4SLinus Torvalds } 25381da177e4SLinus Torvalds 25391da177e4SLinus Torvalds static struct nfs4_stateowner * 25401da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25411da177e4SLinus Torvalds struct xdr_netobj *owner) 25421da177e4SLinus Torvalds { 25431da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25441da177e4SLinus Torvalds struct nfs4_stateowner *op; 25451da177e4SLinus Torvalds 25461da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25471da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25481da177e4SLinus Torvalds return op; 25491da177e4SLinus Torvalds } 25501da177e4SLinus Torvalds return NULL; 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds 25531da177e4SLinus Torvalds /* 25541da177e4SLinus Torvalds * Alloc a lock owner structure. 25551da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25561da177e4SLinus Torvalds * occured. 25571da177e4SLinus Torvalds * 25581da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25591da177e4SLinus Torvalds */ 25601da177e4SLinus Torvalds 25611da177e4SLinus Torvalds static struct nfs4_stateowner * 25621da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25631da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25641da177e4SLinus Torvalds struct nfs4_replay *rp; 25651da177e4SLinus Torvalds unsigned int idhashval; 25661da177e4SLinus Torvalds 25671da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25681da177e4SLinus Torvalds return NULL; 25691da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25701da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25711da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25721da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2573ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2574ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25751da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25761da177e4SLinus Torvalds sop->so_time = 0; 25771da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25781da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2579ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25801da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25811da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25821da177e4SLinus Torvalds sop->so_client = clp; 2583b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2584b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2585b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25861da177e4SLinus Torvalds sop->so_confirmed = 1; 25871da177e4SLinus Torvalds rp = &sop->so_replay; 2588de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25891da177e4SLinus Torvalds rp->rp_buflen = 0; 25901da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25911da177e4SLinus Torvalds return sop; 25921da177e4SLinus Torvalds } 25931da177e4SLinus Torvalds 2594fd39ca9aSNeilBrown static struct nfs4_stateid * 25951da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25961da177e4SLinus Torvalds { 25971da177e4SLinus Torvalds struct nfs4_stateid *stp; 25981da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 25991da177e4SLinus Torvalds 26005ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26015ac049acSNeilBrown if (stp == NULL) 26021da177e4SLinus Torvalds goto out; 26031da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26041da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2605ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2606ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26071da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26088beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2609ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26101da177e4SLinus Torvalds stp->st_stateowner = sop; 261113cd2184SNeilBrown get_nfs4_file(fp); 26121da177e4SLinus Torvalds stp->st_file = fp; 26131da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26141da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26151da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26161da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26171da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26181da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26191da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26204c4cd222SNeilBrown stp->st_openstp = open_stp; 26211da177e4SLinus Torvalds 26221da177e4SLinus Torvalds out: 26231da177e4SLinus Torvalds return stp; 26241da177e4SLinus Torvalds } 26251da177e4SLinus Torvalds 2626fd39ca9aSNeilBrown static int 26271da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26281da177e4SLinus Torvalds { 26291da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26301da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26311da177e4SLinus Torvalds } 26321da177e4SLinus Torvalds 26331da177e4SLinus Torvalds /* 26341da177e4SLinus Torvalds * LOCK operation 26351da177e4SLinus Torvalds */ 26361da177e4SLinus Torvalds int 2637f2327d9aSNeil Brown nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) 26381da177e4SLinus Torvalds { 26393e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2640b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26411da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26421da177e4SLinus Torvalds struct file *filp; 26431da177e4SLinus Torvalds struct file_lock file_lock; 26448dc7c311SAndy Adamson struct file_lock conflock; 26451da177e4SLinus Torvalds int status = 0; 26461da177e4SLinus Torvalds unsigned int strhashval; 26471da177e4SLinus Torvalds 26481da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26491da177e4SLinus Torvalds (long long) lock->lk_offset, 26501da177e4SLinus Torvalds (long long) lock->lk_length); 26511da177e4SLinus Torvalds 26521da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26531da177e4SLinus Torvalds return nfserr_inval; 26541da177e4SLinus Torvalds 2655a6f6ef2fSAndy Adamson if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 2656a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2657a6f6ef2fSAndy Adamson return status; 2658a6f6ef2fSAndy Adamson } 2659a6f6ef2fSAndy Adamson 26601da177e4SLinus Torvalds nfs4_lock_state(); 26611da177e4SLinus Torvalds 26621da177e4SLinus Torvalds if (lock->lk_is_new) { 26631da177e4SLinus Torvalds /* 26641da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2665893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2666893f8770SNeilBrown * lock stateid. 26671da177e4SLinus Torvalds */ 26681da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26691da177e4SLinus Torvalds struct nfs4_file *fp; 26701da177e4SLinus Torvalds 26711da177e4SLinus Torvalds status = nfserr_stale_clientid; 2672849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26731da177e4SLinus Torvalds goto out; 26741da177e4SLinus Torvalds 26751da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 26761da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 26771da177e4SLinus Torvalds lock->lk_new_open_seqid, 26781da177e4SLinus Torvalds &lock->lk_new_open_stateid, 26791da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 26803a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2681b59e3c0eSNeil Brown lock); 268237515177SNeilBrown if (status) 26831da177e4SLinus Torvalds goto out; 26843a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26851da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26861da177e4SLinus Torvalds fp = open_stp->st_file; 26871da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26881da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26891da177e4SLinus Torvalds &lock->v.new.owner); 26903e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26913e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26923e9e3dbeSNeilBrown * create new stateids)? */ 26931da177e4SLinus Torvalds status = nfserr_resource; 2694b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2695b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2696b59e3c0eSNeil Brown if (lock_sop == NULL) 26971da177e4SLinus Torvalds goto out; 2698b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 26998a280510SJ. Bruce Fields if (lock_stp == NULL) 27001da177e4SLinus Torvalds goto out; 27011da177e4SLinus Torvalds } else { 27021da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 27031da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 27041da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27051da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27061da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27073a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27081da177e4SLinus Torvalds if (status) 27091da177e4SLinus Torvalds goto out; 27103a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27111da177e4SLinus Torvalds } 27123a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27131da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27141da177e4SLinus Torvalds 27150dd395dcSNeilBrown status = nfserr_grace; 27160dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27170dd395dcSNeilBrown goto out; 27180dd395dcSNeilBrown status = nfserr_no_grace; 27190dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27200dd395dcSNeilBrown goto out; 27210dd395dcSNeilBrown 27221da177e4SLinus Torvalds locks_init_lock(&file_lock); 27231da177e4SLinus Torvalds switch (lock->lk_type) { 27241da177e4SLinus Torvalds case NFS4_READ_LT: 27251da177e4SLinus Torvalds case NFS4_READW_LT: 27261da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 27271da177e4SLinus Torvalds break; 27281da177e4SLinus Torvalds case NFS4_WRITE_LT: 27291da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27301da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 27311da177e4SLinus Torvalds break; 27321da177e4SLinus Torvalds default: 27331da177e4SLinus Torvalds status = nfserr_inval; 27341da177e4SLinus Torvalds goto out; 27351da177e4SLinus Torvalds } 2736b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27371da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27381da177e4SLinus Torvalds file_lock.fl_file = filp; 27391da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2740d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27411da177e4SLinus Torvalds 27421da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27431da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27441da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27451da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27461da177e4SLinus Torvalds else 27471da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27481da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27491da177e4SLinus Torvalds 27501da177e4SLinus Torvalds /* 27511da177e4SLinus Torvalds * Try to lock the file in the VFS. 27521da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27531da177e4SLinus Torvalds */ 27541da177e4SLinus Torvalds 2755eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2756eb76b3fdSAndy Adamson * locks_copy_lock: */ 2757eb76b3fdSAndy Adamson conflock.fl_ops = NULL; 2758eb76b3fdSAndy Adamson conflock.fl_lmops = NULL; 2759eb76b3fdSAndy Adamson status = posix_lock_file_conf(filp, &file_lock, &conflock); 2760eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); 27611da177e4SLinus Torvalds switch (-status) { 27621da177e4SLinus Torvalds case 0: /* success! */ 27631da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27641da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27651da177e4SLinus Torvalds sizeof(stateid_t)); 2766eb76b3fdSAndy Adamson break; 2767eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2768eb76b3fdSAndy Adamson status = nfserr_denied; 2769eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2770eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2771eb76b3fdSAndy Adamson break; 27721da177e4SLinus Torvalds case (EDEADLK): 27731da177e4SLinus Torvalds status = nfserr_deadlock; 2774eb76b3fdSAndy Adamson break; 27751da177e4SLinus Torvalds default: 2776eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status); 2777eb76b3fdSAndy Adamson status = nfserr_resource; 2778eb76b3fdSAndy Adamson break; 27791da177e4SLinus Torvalds } 27801da177e4SLinus Torvalds out: 27818a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27828a280510SJ. Bruce Fields release_stateowner(lock_sop); 27833a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27843a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 27853a65588aSJ. Bruce Fields *replay_owner = lock->lk_replay_owner; 2786f2327d9aSNeil Brown } 27871da177e4SLinus Torvalds nfs4_unlock_state(); 27881da177e4SLinus Torvalds return status; 27891da177e4SLinus Torvalds } 27901da177e4SLinus Torvalds 27911da177e4SLinus Torvalds /* 27921da177e4SLinus Torvalds * LOCKT operation 27931da177e4SLinus Torvalds */ 27941da177e4SLinus Torvalds int 27951da177e4SLinus Torvalds nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 27961da177e4SLinus Torvalds { 27971da177e4SLinus Torvalds struct inode *inode; 27981da177e4SLinus Torvalds struct file file; 27991da177e4SLinus Torvalds struct file_lock file_lock; 28008dc7c311SAndy Adamson struct file_lock conflock; 28011da177e4SLinus Torvalds int status; 28021da177e4SLinus Torvalds 28031da177e4SLinus Torvalds if (nfs4_in_grace()) 28041da177e4SLinus Torvalds return nfserr_grace; 28051da177e4SLinus Torvalds 28061da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28071da177e4SLinus Torvalds return nfserr_inval; 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28101da177e4SLinus Torvalds nfs4_lock_state(); 28111da177e4SLinus Torvalds 28121da177e4SLinus Torvalds status = nfserr_stale_clientid; 2813849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28141da177e4SLinus Torvalds goto out; 28151da177e4SLinus Torvalds 28161da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 2817849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28181da177e4SLinus Torvalds if (status == nfserr_symlink) 28191da177e4SLinus Torvalds status = nfserr_inval; 28201da177e4SLinus Torvalds goto out; 28211da177e4SLinus Torvalds } 28221da177e4SLinus Torvalds 28231da177e4SLinus Torvalds inode = current_fh->fh_dentry->d_inode; 28241da177e4SLinus Torvalds locks_init_lock(&file_lock); 28251da177e4SLinus Torvalds switch (lockt->lt_type) { 28261da177e4SLinus Torvalds case NFS4_READ_LT: 28271da177e4SLinus Torvalds case NFS4_READW_LT: 28281da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28291da177e4SLinus Torvalds break; 28301da177e4SLinus Torvalds case NFS4_WRITE_LT: 28311da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28321da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28331da177e4SLinus Torvalds break; 28341da177e4SLinus Torvalds default: 28351da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28361da177e4SLinus Torvalds status = nfserr_inval; 28371da177e4SLinus Torvalds goto out; 28381da177e4SLinus Torvalds } 28391da177e4SLinus Torvalds 28401da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28411da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28421da177e4SLinus Torvalds if (lockt->lt_stateowner) 28431da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28441da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28451da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2846d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28471da177e4SLinus Torvalds 28481da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28491da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28501da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28511da177e4SLinus Torvalds else 28521da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28531da177e4SLinus Torvalds 28541da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28551da177e4SLinus Torvalds 28561da177e4SLinus Torvalds /* posix_test_lock uses the struct file _only_ to resolve the inode. 28571da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 28581da177e4SLinus Torvalds * file may not exist, pass posix_test_lock a struct file with 28591da177e4SLinus Torvalds * only the dentry:inode set. 28601da177e4SLinus Torvalds */ 28611da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 28621da177e4SLinus Torvalds file.f_dentry = current_fh->fh_dentry; 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds status = nfs_ok; 28658dc7c311SAndy Adamson if (posix_test_lock(&file, &file_lock, &conflock)) { 28661da177e4SLinus Torvalds status = nfserr_denied; 28678dc7c311SAndy Adamson nfs4_set_lock_denied(&conflock, &lockt->lt_denied); 28681da177e4SLinus Torvalds } 28691da177e4SLinus Torvalds out: 28701da177e4SLinus Torvalds nfs4_unlock_state(); 28711da177e4SLinus Torvalds return status; 28721da177e4SLinus Torvalds } 28731da177e4SLinus Torvalds 28741da177e4SLinus Torvalds int 2875f2327d9aSNeil Brown nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) 28761da177e4SLinus Torvalds { 28771da177e4SLinus Torvalds struct nfs4_stateid *stp; 28781da177e4SLinus Torvalds struct file *filp = NULL; 28791da177e4SLinus Torvalds struct file_lock file_lock; 28801da177e4SLinus Torvalds int status; 28811da177e4SLinus Torvalds 28821da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28831da177e4SLinus Torvalds (long long) locku->lu_offset, 28841da177e4SLinus Torvalds (long long) locku->lu_length); 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28871da177e4SLinus Torvalds return nfserr_inval; 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds nfs4_lock_state(); 28901da177e4SLinus Torvalds 28911da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, 28921da177e4SLinus Torvalds locku->lu_seqid, 28931da177e4SLinus Torvalds &locku->lu_stateid, 28941da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 28951da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 28961da177e4SLinus Torvalds goto out; 28971da177e4SLinus Torvalds 28981da177e4SLinus Torvalds filp = stp->st_vfs_file; 28991da177e4SLinus Torvalds BUG_ON(!filp); 29001da177e4SLinus Torvalds locks_init_lock(&file_lock); 29011da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29021da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29031da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29041da177e4SLinus Torvalds file_lock.fl_file = filp; 29051da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2906d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29071da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29081da177e4SLinus Torvalds 29091da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29101da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29111da177e4SLinus Torvalds else 29121da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29131da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29141da177e4SLinus Torvalds 29151da177e4SLinus Torvalds /* 29161da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29171da177e4SLinus Torvalds */ 29181da177e4SLinus Torvalds status = posix_lock_file(filp, &file_lock); 29191da177e4SLinus Torvalds if (status) { 2920849823c5SNeil Brown dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 29211da177e4SLinus Torvalds goto out_nfserr; 29221da177e4SLinus Torvalds } 29231da177e4SLinus Torvalds /* 29241da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29251da177e4SLinus Torvalds */ 29261da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29271da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29281da177e4SLinus Torvalds 29291da177e4SLinus Torvalds out: 2930f2327d9aSNeil Brown if (locku->lu_stateowner) { 29311da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2932f2327d9aSNeil Brown *replay_owner = locku->lu_stateowner; 2933f2327d9aSNeil Brown } 29341da177e4SLinus Torvalds nfs4_unlock_state(); 29351da177e4SLinus Torvalds return status; 29361da177e4SLinus Torvalds 29371da177e4SLinus Torvalds out_nfserr: 29381da177e4SLinus Torvalds status = nfserrno(status); 29391da177e4SLinus Torvalds goto out; 29401da177e4SLinus Torvalds } 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds /* 29431da177e4SLinus Torvalds * returns 29441da177e4SLinus Torvalds * 1: locks held by lockowner 29451da177e4SLinus Torvalds * 0: no locks held by lockowner 29461da177e4SLinus Torvalds */ 29471da177e4SLinus Torvalds static int 29481da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29491da177e4SLinus Torvalds { 29501da177e4SLinus Torvalds struct file_lock **flpp; 29511da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 29521da177e4SLinus Torvalds int status = 0; 29531da177e4SLinus Torvalds 29541da177e4SLinus Torvalds lock_kernel(); 29551da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2956796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29571da177e4SLinus Torvalds status = 1; 29581da177e4SLinus Torvalds goto out; 29591da177e4SLinus Torvalds } 2960796dadfdSJ. Bruce Fields } 29611da177e4SLinus Torvalds out: 29621da177e4SLinus Torvalds unlock_kernel(); 29631da177e4SLinus Torvalds return status; 29641da177e4SLinus Torvalds } 29651da177e4SLinus Torvalds 29661da177e4SLinus Torvalds int 29671da177e4SLinus Torvalds nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 29681da177e4SLinus Torvalds { 29691da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29703e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29713e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29721da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29733e9e3dbeSNeilBrown struct list_head matches; 29743e9e3dbeSNeilBrown int i; 29751da177e4SLinus Torvalds int status; 29761da177e4SLinus Torvalds 29771da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29781da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29791da177e4SLinus Torvalds 29801da177e4SLinus Torvalds /* XXX check for lease expiration */ 29811da177e4SLinus Torvalds 29821da177e4SLinus Torvalds status = nfserr_stale_clientid; 2983849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29841da177e4SLinus Torvalds return status; 29851da177e4SLinus Torvalds 29861da177e4SLinus Torvalds nfs4_lock_state(); 29871da177e4SLinus Torvalds 29881da177e4SLinus Torvalds status = nfserr_locks_held; 29893e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29903e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29913e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29923e9e3dbeSNeilBrown * data structures. */ 29933e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29943e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 29953e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 29963e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 29973e9e3dbeSNeilBrown continue; 29983e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 2999ea1da636SNeilBrown st_perstateowner) { 30003e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30011da177e4SLinus Torvalds goto out; 30023e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30033e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30043e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30051da177e4SLinus Torvalds } 30063e9e3dbeSNeilBrown } 30073e9e3dbeSNeilBrown } 30083e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30093e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30103e9e3dbeSNeilBrown * have been checked. */ 30111da177e4SLinus Torvalds status = nfs_ok; 30120fa822e4SNeilBrown while (!list_empty(&matches)) { 30130fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30140fa822e4SNeilBrown so_perclient); 30150fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30160fa822e4SNeilBrown * for openowners. */ 30170fa822e4SNeilBrown list_del(&sop->so_perclient); 30183e9e3dbeSNeilBrown release_stateowner(sop); 30191da177e4SLinus Torvalds } 30201da177e4SLinus Torvalds out: 30211da177e4SLinus Torvalds nfs4_unlock_state(); 30221da177e4SLinus Torvalds return status; 30231da177e4SLinus Torvalds } 30241da177e4SLinus Torvalds 30251da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3026a55370a3SNeilBrown alloc_reclaim(void) 30271da177e4SLinus Torvalds { 3028a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30291da177e4SLinus Torvalds } 30301da177e4SLinus Torvalds 3031c7b9a459SNeilBrown int 3032c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3033c7b9a459SNeilBrown { 3034c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3035c7b9a459SNeilBrown struct nfs4_client *clp; 3036c7b9a459SNeilBrown 3037c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3038c7b9a459SNeilBrown return clp ? 1 : 0; 3039c7b9a459SNeilBrown } 3040c7b9a459SNeilBrown 30411da177e4SLinus Torvalds /* 30421da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30431da177e4SLinus Torvalds */ 3044190e4fbfSNeilBrown int 3045190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30461da177e4SLinus Torvalds { 30471da177e4SLinus Torvalds unsigned int strhashval; 30481da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30491da177e4SLinus Torvalds 3050a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3051a55370a3SNeilBrown crp = alloc_reclaim(); 30521da177e4SLinus Torvalds if (!crp) 30531da177e4SLinus Torvalds return 0; 3054a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30551da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30561da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3057a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30581da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30591da177e4SLinus Torvalds return 1; 30601da177e4SLinus Torvalds } 30611da177e4SLinus Torvalds 30621da177e4SLinus Torvalds static void 30631da177e4SLinus Torvalds nfs4_release_reclaim(void) 30641da177e4SLinus Torvalds { 30651da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30661da177e4SLinus Torvalds int i; 30671da177e4SLinus Torvalds 30681da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30691da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30701da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30711da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30721da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30731da177e4SLinus Torvalds kfree(crp); 30741da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30751da177e4SLinus Torvalds } 30761da177e4SLinus Torvalds } 30771da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30781da177e4SLinus Torvalds } 30791da177e4SLinus Torvalds 30801da177e4SLinus Torvalds /* 30811da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3082fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30831da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30841da177e4SLinus Torvalds { 30851da177e4SLinus Torvalds unsigned int strhashval; 30861da177e4SLinus Torvalds struct nfs4_client *clp; 30871da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30881da177e4SLinus Torvalds 30891da177e4SLinus Torvalds 30901da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30911da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30921da177e4SLinus Torvalds if (clp == NULL) 30931da177e4SLinus Torvalds return NULL; 30941da177e4SLinus Torvalds 3095a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3096a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3097a55370a3SNeilBrown clp->cl_recdir); 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3100a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31011da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3102a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31031da177e4SLinus Torvalds return crp; 31041da177e4SLinus Torvalds } 31051da177e4SLinus Torvalds } 31061da177e4SLinus Torvalds return NULL; 31071da177e4SLinus Torvalds } 31081da177e4SLinus Torvalds 31091da177e4SLinus Torvalds /* 31101da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31111da177e4SLinus Torvalds */ 31121da177e4SLinus Torvalds int 31131da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31141da177e4SLinus Torvalds { 3115dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31161da177e4SLinus Torvalds } 31171da177e4SLinus Torvalds 3118ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31191da177e4SLinus Torvalds 3120ac4d8ff2SNeilBrown void 3121ac4d8ff2SNeilBrown nfs4_state_init(void) 31221da177e4SLinus Torvalds { 31231da177e4SLinus Torvalds int i; 31241da177e4SLinus Torvalds 31251da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31261da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31271da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31281da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31291da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31301da177e4SLinus Torvalds } 31311da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31321da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31331da177e4SLinus Torvalds } 31341da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31351da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31361da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31371da177e4SLinus Torvalds } 31381da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31391da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31401da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31411da177e4SLinus Torvalds } 31421da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31431da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31441da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31451da177e4SLinus Torvalds } 31461da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31471da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31481da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31491da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3150ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3151ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3152ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3153ac4d8ff2SNeilBrown } 3154ac4d8ff2SNeilBrown 3155190e4fbfSNeilBrown static void 3156190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3157190e4fbfSNeilBrown { 3158190e4fbfSNeilBrown int status; 3159190e4fbfSNeilBrown 31600964a3d3SNeilBrown nfs4_lock_state(); 31610964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3162190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31630964a3d3SNeilBrown nfs4_unlock_state(); 3164190e4fbfSNeilBrown if (status) 3165190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3166190e4fbfSNeilBrown } 3167190e4fbfSNeilBrown 3168ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3169ac4d8ff2SNeilBrown 3170ac4d8ff2SNeilBrown static void 3171ac4d8ff2SNeilBrown __nfs4_state_start(void) 3172ac4d8ff2SNeilBrown { 3173ac4d8ff2SNeilBrown time_t grace_time; 3174ac4d8ff2SNeilBrown 31751da177e4SLinus Torvalds boot_time = get_seconds(); 3176d99a05adSNeilBrown grace_time = max(user_lease_time, lease_time); 3177d99a05adSNeilBrown lease_time = user_lease_time; 3178a76b4319SNeilBrown in_grace = 1; 31791da177e4SLinus Torvalds printk("NFSD: starting %ld-second grace period\n", grace_time); 318058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 3181a76b4319SNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); 31821da177e4SLinus Torvalds } 31831da177e4SLinus Torvalds 31841da177e4SLinus Torvalds int 318576a3550eSNeilBrown nfs4_state_start(void) 31861da177e4SLinus Torvalds { 31871da177e4SLinus Torvalds int status; 31881da177e4SLinus Torvalds 31891da177e4SLinus Torvalds if (nfs4_init) 31901da177e4SLinus Torvalds return 0; 31911da177e4SLinus Torvalds status = nfsd4_init_slabs(); 31921da177e4SLinus Torvalds if (status) 31931da177e4SLinus Torvalds return status; 3194190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 319576a3550eSNeilBrown __nfs4_state_start(); 31961da177e4SLinus Torvalds nfs4_init = 1; 31971da177e4SLinus Torvalds return 0; 31981da177e4SLinus Torvalds } 31991da177e4SLinus Torvalds 32001da177e4SLinus Torvalds int 32011da177e4SLinus Torvalds nfs4_in_grace(void) 32021da177e4SLinus Torvalds { 3203a76b4319SNeilBrown return in_grace; 32041da177e4SLinus Torvalds } 32051da177e4SLinus Torvalds 32061da177e4SLinus Torvalds time_t 32071da177e4SLinus Torvalds nfs4_lease_time(void) 32081da177e4SLinus Torvalds { 32091da177e4SLinus Torvalds return lease_time; 32101da177e4SLinus Torvalds } 32111da177e4SLinus Torvalds 32121da177e4SLinus Torvalds static void 32131da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32141da177e4SLinus Torvalds { 32151da177e4SLinus Torvalds int i; 32161da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32171da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32181da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32191da177e4SLinus Torvalds 32201da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32211da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32221da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32231da177e4SLinus Torvalds expire_client(clp); 32241da177e4SLinus Torvalds } 32251da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32261da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32271da177e4SLinus Torvalds expire_client(clp); 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds } 32301da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32311da177e4SLinus Torvalds spin_lock(&recall_lock); 32321da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32331da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32341da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds spin_unlock(&recall_lock); 32371da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32381da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32391da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32401da177e4SLinus Torvalds unhash_delegation(dp); 32411da177e4SLinus Torvalds } 32421da177e4SLinus Torvalds 32431da177e4SLinus Torvalds cancel_delayed_work(&laundromat_work); 3244190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32451da177e4SLinus Torvalds nfs4_init = 0; 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds 32481da177e4SLinus Torvalds void 32491da177e4SLinus Torvalds nfs4_state_shutdown(void) 32501da177e4SLinus Torvalds { 32515e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 32525e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 32531da177e4SLinus Torvalds nfs4_lock_state(); 32541da177e4SLinus Torvalds nfs4_release_reclaim(); 32551da177e4SLinus Torvalds __nfs4_state_shutdown(); 32561da177e4SLinus Torvalds nfsd4_free_slabs(); 32571da177e4SLinus Torvalds nfs4_unlock_state(); 32581da177e4SLinus Torvalds } 32591da177e4SLinus Torvalds 32600964a3d3SNeilBrown static void 32610964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32620964a3d3SNeilBrown { 32630964a3d3SNeilBrown nfs4_lock_state(); 32640964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32650964a3d3SNeilBrown nfs4_unlock_state(); 32660964a3d3SNeilBrown } 32670964a3d3SNeilBrown 32680964a3d3SNeilBrown /* 32690964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32700964a3d3SNeilBrown */ 32710964a3d3SNeilBrown int 32720964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32730964a3d3SNeilBrown { 32740964a3d3SNeilBrown int status; 32750964a3d3SNeilBrown struct nameidata nd; 32760964a3d3SNeilBrown 32770964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 32780964a3d3SNeilBrown if (status) 32790964a3d3SNeilBrown return status; 32800964a3d3SNeilBrown status = -ENOTDIR; 32810964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 32820964a3d3SNeilBrown nfs4_set_recdir(recdir); 32830964a3d3SNeilBrown status = 0; 32840964a3d3SNeilBrown } 32850964a3d3SNeilBrown path_release(&nd); 32860964a3d3SNeilBrown return status; 32870964a3d3SNeilBrown } 32880964a3d3SNeilBrown 32891da177e4SLinus Torvalds /* 32901da177e4SLinus Torvalds * Called when leasetime is changed. 32911da177e4SLinus Torvalds * 3292d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3293d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3294d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3295d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3296d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 32971da177e4SLinus Torvalds */ 32981da177e4SLinus Torvalds void 32991da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33001da177e4SLinus Torvalds { 3301d99a05adSNeilBrown lock_kernel(); 3302d99a05adSNeilBrown user_lease_time = leasetime; 3303d99a05adSNeilBrown unlock_kernel(); 33041da177e4SLinus Torvalds } 3305