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 342f8314dc6SPanagiotis Issaris if ((clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 3431da177e4SLinus Torvalds if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 3441da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3451da177e4SLinus Torvalds clp->cl_name.len = name.len; 3461da177e4SLinus Torvalds } 3471da177e4SLinus Torvalds else { 3481da177e4SLinus Torvalds kfree(clp); 3491da177e4SLinus Torvalds clp = NULL; 3501da177e4SLinus Torvalds } 3511da177e4SLinus Torvalds } 3521da177e4SLinus Torvalds return clp; 3531da177e4SLinus Torvalds } 3541da177e4SLinus Torvalds 3551da177e4SLinus Torvalds static inline void 3561da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3571da177e4SLinus Torvalds { 3581da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3591da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3601da177e4SLinus Torvalds kfree(clp->cl_name.data); 3611da177e4SLinus Torvalds kfree(clp); 3621da177e4SLinus Torvalds } 3631da177e4SLinus Torvalds 3641da177e4SLinus Torvalds void 3651da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3661da177e4SLinus Torvalds { 3671da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3681da177e4SLinus Torvalds free_client(clp); 3691da177e4SLinus Torvalds } 3701da177e4SLinus Torvalds 3711da177e4SLinus Torvalds static void 3724e2fd495SNeilBrown shutdown_callback_client(struct nfs4_client *clp) 3734e2fd495SNeilBrown { 3744e2fd495SNeilBrown struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3754e2fd495SNeilBrown 3764e2fd495SNeilBrown /* shutdown rpc client, ending any outstanding recall rpcs */ 3774e2fd495SNeilBrown if (clnt) { 3784e2fd495SNeilBrown clp->cl_callback.cb_client = NULL; 3794e2fd495SNeilBrown rpc_shutdown_client(clnt); 3804e2fd495SNeilBrown rpciod_down(); 3814e2fd495SNeilBrown } 3824e2fd495SNeilBrown } 3834e2fd495SNeilBrown 3844e2fd495SNeilBrown static void 3851da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3861da177e4SLinus Torvalds { 3871da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3881da177e4SLinus Torvalds struct nfs4_delegation *dp; 3891da177e4SLinus Torvalds struct list_head reaplist; 3901da177e4SLinus Torvalds 3911da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3921da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3931da177e4SLinus Torvalds 3944e2fd495SNeilBrown shutdown_callback_client(clp); 3951da177e4SLinus Torvalds 3961da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 3971da177e4SLinus Torvalds spin_lock(&recall_lock); 398ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 399ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4001da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4011da177e4SLinus Torvalds dp->dl_flock); 402ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4031da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4041da177e4SLinus Torvalds } 4051da177e4SLinus Torvalds spin_unlock(&recall_lock); 4061da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4071da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4081da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4091da177e4SLinus Torvalds unhash_delegation(dp); 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4121da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4131da177e4SLinus Torvalds list_del(&clp->cl_lru); 414ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 415ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4161da177e4SLinus Torvalds release_stateowner(sop); 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds put_nfs4_client(clp); 4191da177e4SLinus Torvalds } 4201da177e4SLinus Torvalds 4211da177e4SLinus Torvalds static struct nfs4_client * 422a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 4231da177e4SLinus Torvalds struct nfs4_client *clp; 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 4261da177e4SLinus Torvalds goto out; 427a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4281da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4291da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4301da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4311da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 432ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 433ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4341da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4351da177e4SLinus Torvalds out: 4361da177e4SLinus Torvalds return clp; 4371da177e4SLinus Torvalds } 4381da177e4SLinus Torvalds 4391da177e4SLinus Torvalds static void 4401da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 4411da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 4421da177e4SLinus Torvalds } 4431da177e4SLinus Torvalds 4441da177e4SLinus Torvalds static void 4451da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4461da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4471da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4481da177e4SLinus Torvalds } 4491da177e4SLinus Torvalds 4501da177e4SLinus Torvalds static void 4511da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4541da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4551da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4561da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4571da177e4SLinus Torvalds } 4581da177e4SLinus Torvalds 459a55370a3SNeilBrown static inline int 460a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 461a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 4641da177e4SLinus Torvalds static int 4651da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4661da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4671da177e4SLinus Torvalds } 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds static int 4701da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4711da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4721da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4731da177e4SLinus Torvalds } 4741da177e4SLinus Torvalds 4751da177e4SLinus Torvalds /* XXX what about NGROUP */ 4761da177e4SLinus Torvalds static int 4771da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4781da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4791da177e4SLinus Torvalds 4801da177e4SLinus Torvalds } 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds static void 4831da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4841da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4851da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4861da177e4SLinus Torvalds } 4871da177e4SLinus Torvalds 4881da177e4SLinus Torvalds static void 4891da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4901da177e4SLinus Torvalds struct timespec tv; 4911da177e4SLinus Torvalds u32 * p; 4921da177e4SLinus Torvalds 4931da177e4SLinus Torvalds tv = CURRENT_TIME; 4941da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 4951da177e4SLinus Torvalds *p++ = tv.tv_sec; 4961da177e4SLinus Torvalds *p++ = tv.tv_nsec; 4971da177e4SLinus Torvalds } 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds static int 5001da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 5011da177e4SLinus Torvalds 5021da177e4SLinus Torvalds if (name.len == 0) 5031da177e4SLinus Torvalds return 0; 5041da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5051da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 5061da177e4SLinus Torvalds return 0; 5071da177e4SLinus Torvalds } 5081da177e4SLinus Torvalds return 1; 5091da177e4SLinus Torvalds } 5101da177e4SLinus Torvalds 511fd39ca9aSNeilBrown static void 5121da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5131da177e4SLinus Torvalds { 5141da177e4SLinus Torvalds unsigned int idhashval; 5151da177e4SLinus Torvalds 5161da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 5171da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5181da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 5191da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 5201da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds 523fd39ca9aSNeilBrown static void 5241da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 5251da177e4SLinus Torvalds { 5261da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5271da177e4SLinus Torvalds unsigned int strhashval; 5281da177e4SLinus Torvalds 5291da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 5301da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 531f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 532a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 5331da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 5341da177e4SLinus Torvalds renew_client(clp); 5351da177e4SLinus Torvalds } 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds static struct nfs4_client * 5381da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5391da177e4SLinus Torvalds { 5401da177e4SLinus Torvalds struct nfs4_client *clp; 5411da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5421da177e4SLinus Torvalds 5431da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 5441da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5451da177e4SLinus Torvalds return clp; 5461da177e4SLinus Torvalds } 5471da177e4SLinus Torvalds return NULL; 5481da177e4SLinus Torvalds } 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds static struct nfs4_client * 5511da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5521da177e4SLinus Torvalds { 5531da177e4SLinus Torvalds struct nfs4_client *clp; 5541da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5551da177e4SLinus Torvalds 5561da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5571da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5581da177e4SLinus Torvalds return clp; 5591da177e4SLinus Torvalds } 5601da177e4SLinus Torvalds return NULL; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds 56328ce6054SNeilBrown static struct nfs4_client * 56428ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 56528ce6054SNeilBrown { 56628ce6054SNeilBrown struct nfs4_client *clp; 56728ce6054SNeilBrown 56828ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 56928ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 57028ce6054SNeilBrown return clp; 57128ce6054SNeilBrown } 57228ce6054SNeilBrown return NULL; 57328ce6054SNeilBrown } 57428ce6054SNeilBrown 57528ce6054SNeilBrown static struct nfs4_client * 57628ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 57728ce6054SNeilBrown { 57828ce6054SNeilBrown struct nfs4_client *clp; 57928ce6054SNeilBrown 58028ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 58128ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 58228ce6054SNeilBrown return clp; 58328ce6054SNeilBrown } 58428ce6054SNeilBrown return NULL; 58528ce6054SNeilBrown } 58628ce6054SNeilBrown 5871da177e4SLinus Torvalds /* a helper function for parse_callback */ 5881da177e4SLinus Torvalds static int 5891da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5901da177e4SLinus Torvalds { 5911da177e4SLinus Torvalds unsigned int len = *lenp; 5921da177e4SLinus Torvalds char *p = *addrp; 5931da177e4SLinus Torvalds int n = -1; 5941da177e4SLinus Torvalds char c; 5951da177e4SLinus Torvalds 5961da177e4SLinus Torvalds for (;;) { 5971da177e4SLinus Torvalds if (!len) 5981da177e4SLinus Torvalds break; 5991da177e4SLinus Torvalds len--; 6001da177e4SLinus Torvalds c = *p++; 6011da177e4SLinus Torvalds if (c == '.') 6021da177e4SLinus Torvalds break; 6031da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6041da177e4SLinus Torvalds n = -1; 6051da177e4SLinus Torvalds break; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds if (n < 0) 6081da177e4SLinus Torvalds n = 0; 6091da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6101da177e4SLinus Torvalds if (n > 255) { 6111da177e4SLinus Torvalds n = -1; 6121da177e4SLinus Torvalds break; 6131da177e4SLinus Torvalds } 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds *lenp = len; 6161da177e4SLinus Torvalds *addrp = p; 6171da177e4SLinus Torvalds return n; 6181da177e4SLinus Torvalds } 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 621fd39ca9aSNeilBrown static int 6221da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 6231da177e4SLinus Torvalds { 6241da177e4SLinus Torvalds int temp = 0; 6251da177e4SLinus Torvalds u32 cbaddr = 0; 6261da177e4SLinus Torvalds u16 cbport = 0; 6271da177e4SLinus Torvalds u32 addrlen = addr_len; 6281da177e4SLinus Torvalds char *addr = addr_val; 6291da177e4SLinus Torvalds int i, shift; 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds /* ipaddress */ 6321da177e4SLinus Torvalds shift = 24; 6331da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 6341da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6351da177e4SLinus Torvalds return 0; 6361da177e4SLinus Torvalds } 6371da177e4SLinus Torvalds cbaddr |= (temp << shift); 6381da177e4SLinus Torvalds if (shift > 0) 6391da177e4SLinus Torvalds shift -= 8; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds *cbaddrp = cbaddr; 6421da177e4SLinus Torvalds 6431da177e4SLinus Torvalds /* port */ 6441da177e4SLinus Torvalds shift = 8; 6451da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6461da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6471da177e4SLinus Torvalds return 0; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds cbport |= (temp << shift); 6501da177e4SLinus Torvalds if (shift > 0) 6511da177e4SLinus Torvalds shift -= 8; 6521da177e4SLinus Torvalds } 6531da177e4SLinus Torvalds *cbportp = cbport; 6541da177e4SLinus Torvalds return 1; 6551da177e4SLinus Torvalds } 6561da177e4SLinus Torvalds 657fd39ca9aSNeilBrown static void 6581da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6591da177e4SLinus Torvalds { 6601da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6611da177e4SLinus Torvalds 6621da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6631da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6641da177e4SLinus Torvalds goto out_err; 6651da177e4SLinus Torvalds 6661da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6671da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6681da177e4SLinus Torvalds goto out_err; 6691da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6701da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6711da177e4SLinus Torvalds return; 6721da177e4SLinus Torvalds out_err: 673849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6741da177e4SLinus Torvalds "will not receive delegations\n", 6751da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6761da177e4SLinus Torvalds 6771da177e4SLinus Torvalds return; 6781da177e4SLinus Torvalds } 6791da177e4SLinus Torvalds 6801da177e4SLinus Torvalds /* 6811da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6821da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6831da177e4SLinus Torvalds * CASE0 - CASE4 below. 6841da177e4SLinus Torvalds * 6851da177e4SLinus Torvalds * NOTES: 6861da177e4SLinus Torvalds * callback information will be processed in a future patch 6871da177e4SLinus Torvalds * 6881da177e4SLinus Torvalds * an unconfirmed record is added when: 6891da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6901da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6911da177e4SLinus Torvalds * verifier, and clientid. 6921da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6931da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6941da177e4SLinus Torvalds * name and principal 6951da177e4SLinus Torvalds * 6961da177e4SLinus Torvalds * an unconfirmed record is replaced when: 6971da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 6981da177e4SLinus Torvalds * and an unconfirmed record is found with matching 6991da177e4SLinus Torvalds * name, principal, and with clientid and 7001da177e4SLinus Torvalds * confirm that does not match the confirmed record. 7011da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 7021da177e4SLinus Torvalds * principal. there is an unconfirmed record with 7031da177e4SLinus Torvalds * matching name, principal. 7041da177e4SLinus Torvalds * 7051da177e4SLinus Torvalds * an unconfirmed record is deleted when: 7061da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 7071da177e4SLinus Torvalds * and confirmed clientid. 7081da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 7091da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 7101da177e4SLinus Torvalds * as described above. 7111da177e4SLinus Torvalds * 7121da177e4SLinus Torvalds */ 713b37ad28bSAl Viro __be32 7141da177e4SLinus Torvalds nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 7151da177e4SLinus Torvalds { 716*c7afef1fSAl Viro __be32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 7171da177e4SLinus Torvalds struct xdr_netobj clname = { 7181da177e4SLinus Torvalds .len = setclid->se_namelen, 7191da177e4SLinus Torvalds .data = setclid->se_name, 7201da177e4SLinus Torvalds }; 7211da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 7221da177e4SLinus Torvalds unsigned int strhashval; 72328ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 724b37ad28bSAl Viro __be32 status; 725a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7261da177e4SLinus Torvalds 7271da177e4SLinus Torvalds if (!check_name(clname)) 72873aea4ecSNeil Brown return nfserr_inval; 7291da177e4SLinus Torvalds 730a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 731a55370a3SNeilBrown if (status) 73273aea4ecSNeil Brown return status; 733a55370a3SNeilBrown 7341da177e4SLinus Torvalds /* 7351da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7361da177e4SLinus Torvalds * We get here on a DRC miss. 7371da177e4SLinus Torvalds */ 7381da177e4SLinus Torvalds 739a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7401da177e4SLinus Torvalds 7411da177e4SLinus Torvalds nfs4_lock_state(); 74228ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 74328ce6054SNeilBrown if (conf) { 7441da177e4SLinus Torvalds /* 7451da177e4SLinus Torvalds * CASE 0: 7461da177e4SLinus Torvalds * clname match, confirmed, different principal 7471da177e4SLinus Torvalds * or different ip_address 7481da177e4SLinus Torvalds */ 7491da177e4SLinus Torvalds status = nfserr_clid_inuse; 75028ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 75128ce6054SNeilBrown || conf->cl_addr != ip_addr) { 7521da177e4SLinus Torvalds printk("NFSD: setclientid: string in use by client" 7531da177e4SLinus Torvalds "(clientid %08x/%08x)\n", 75428ce6054SNeilBrown conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); 7551da177e4SLinus Torvalds goto out; 7561da177e4SLinus Torvalds } 7571da177e4SLinus Torvalds } 75828ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7591da177e4SLinus Torvalds status = nfserr_resource; 7601da177e4SLinus Torvalds if (!conf) { 7611da177e4SLinus Torvalds /* 7621da177e4SLinus Torvalds * CASE 4: 7631da177e4SLinus Torvalds * placed first, because it is the normal case. 7641da177e4SLinus Torvalds */ 7651da177e4SLinus Torvalds if (unconf) 7661da177e4SLinus Torvalds expire_client(unconf); 767a55370a3SNeilBrown new = create_client(clname, dname); 768a55370a3SNeilBrown if (new == NULL) 7691da177e4SLinus Torvalds goto out; 7701da177e4SLinus Torvalds copy_verf(new, &clverifier); 7711da177e4SLinus Torvalds new->cl_addr = ip_addr; 7721da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7731da177e4SLinus Torvalds gen_clid(new); 7741da177e4SLinus Torvalds gen_confirm(new); 7751da177e4SLinus Torvalds gen_callback(new, setclid); 7761da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7771da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7781da177e4SLinus Torvalds /* 7791da177e4SLinus Torvalds * CASE 1: 7801da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7811da177e4SLinus Torvalds * verifier match: probable callback update 7821da177e4SLinus Torvalds * 7831da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7841da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7851da177e4SLinus Torvalds * 7861da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7871da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7881da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7891da177e4SLinus Torvalds * new cl_confirm 7901da177e4SLinus Torvalds */ 79131f4a6c1SNeilBrown if (unconf) { 79231f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 79331f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 79431f4a6c1SNeilBrown * This has the advantage that there is at most 79531f4a6c1SNeilBrown * one {*x***} in either list at any time. 79631f4a6c1SNeilBrown */ 7971da177e4SLinus Torvalds expire_client(unconf); 7981da177e4SLinus Torvalds } 799a55370a3SNeilBrown new = create_client(clname, dname); 800a55370a3SNeilBrown if (new == NULL) 8011da177e4SLinus Torvalds goto out; 8021da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 8031da177e4SLinus Torvalds new->cl_addr = ip_addr; 8041da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8051da177e4SLinus Torvalds copy_clid(new, conf); 8061da177e4SLinus Torvalds gen_confirm(new); 8071da177e4SLinus Torvalds gen_callback(new, setclid); 8081da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 8091da177e4SLinus Torvalds } else if (!unconf) { 8101da177e4SLinus Torvalds /* 8111da177e4SLinus Torvalds * CASE 2: 8121da177e4SLinus Torvalds * clname match, confirmed, principal match 8131da177e4SLinus Torvalds * verfier does not match 8141da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 8151da177e4SLinus Torvalds * using input clverifier, clname, and callback info 8161da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 8171da177e4SLinus Torvalds */ 818a55370a3SNeilBrown new = create_client(clname, dname); 819a55370a3SNeilBrown if (new == NULL) 8201da177e4SLinus Torvalds goto out; 8211da177e4SLinus Torvalds copy_verf(new,&clverifier); 8221da177e4SLinus Torvalds new->cl_addr = ip_addr; 8231da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8241da177e4SLinus Torvalds gen_clid(new); 8251da177e4SLinus Torvalds gen_confirm(new); 8261da177e4SLinus Torvalds gen_callback(new, setclid); 8271da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8281da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 8291da177e4SLinus Torvalds /* 8301da177e4SLinus Torvalds * CASE3: 8311da177e4SLinus Torvalds * confirmed found (name, principal match) 8321da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 8331da177e4SLinus Torvalds * 8341da177e4SLinus Torvalds * unconfirmed found (name match) 8351da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 8361da177e4SLinus Torvalds * 8371da177e4SLinus Torvalds * remove unconfirmed. 8381da177e4SLinus Torvalds * 8391da177e4SLinus Torvalds * create an unconfirmed nfs4_client 8401da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 8411da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 8421da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 8431da177e4SLinus Torvalds */ 8441da177e4SLinus Torvalds expire_client(unconf); 845a55370a3SNeilBrown new = create_client(clname, dname); 846a55370a3SNeilBrown if (new == NULL) 8471da177e4SLinus Torvalds goto out; 8481da177e4SLinus Torvalds copy_verf(new,&clverifier); 8491da177e4SLinus Torvalds new->cl_addr = ip_addr; 8501da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8511da177e4SLinus Torvalds gen_clid(new); 8521da177e4SLinus Torvalds gen_confirm(new); 8531da177e4SLinus Torvalds gen_callback(new, setclid); 8541da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8551da177e4SLinus Torvalds } else { 8561da177e4SLinus Torvalds /* No cases hit !!! */ 8571da177e4SLinus Torvalds status = nfserr_inval; 8581da177e4SLinus Torvalds goto out; 8591da177e4SLinus Torvalds 8601da177e4SLinus Torvalds } 8611da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8621da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8631da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8641da177e4SLinus Torvalds status = nfs_ok; 8651da177e4SLinus Torvalds out: 8661da177e4SLinus Torvalds nfs4_unlock_state(); 8671da177e4SLinus Torvalds return status; 8681da177e4SLinus Torvalds } 8691da177e4SLinus Torvalds 8701da177e4SLinus Torvalds 8711da177e4SLinus Torvalds /* 8721da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8731da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8741da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8751da177e4SLinus Torvalds * 8761da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8771da177e4SLinus Torvalds */ 878b37ad28bSAl Viro __be32 8791da177e4SLinus Torvalds nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 8801da177e4SLinus Torvalds { 881*c7afef1fSAl Viro __be32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 88221ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8831da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8841da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 885b37ad28bSAl Viro __be32 status; 8861da177e4SLinus Torvalds 8871da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8881da177e4SLinus Torvalds return nfserr_stale_clientid; 8891da177e4SLinus Torvalds /* 8901da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8911da177e4SLinus Torvalds * We get here on a DRC miss. 8921da177e4SLinus Torvalds */ 8931da177e4SLinus Torvalds 8941da177e4SLinus Torvalds nfs4_lock_state(); 89521ab45a4SNeilBrown 89621ab45a4SNeilBrown conf = find_confirmed_client(clid); 89721ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 89821ab45a4SNeilBrown 89922de4d83SNeilBrown status = nfserr_clid_inuse; 90021ab45a4SNeilBrown if (conf && conf->cl_addr != ip_addr) 9011da177e4SLinus Torvalds goto out; 90221ab45a4SNeilBrown if (unconf && unconf->cl_addr != ip_addr) 9031da177e4SLinus Torvalds goto out; 90421ab45a4SNeilBrown 9051da177e4SLinus Torvalds if ((conf && unconf) && 9061da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 9071da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 908a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 9091da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 9107c79f737SNeilBrown /* CASE 1: 9117c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 9127c79f737SNeilBrown * conf record that matches input clientid. 9137c79f737SNeilBrown * conf and unconf records match names, verifiers 9147c79f737SNeilBrown */ 9151da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 9161da177e4SLinus Torvalds status = nfserr_clid_inuse; 9171da177e4SLinus Torvalds else { 9181a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 9191a69c179SNeilBrown * change request correctly. */ 920cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 92121ab45a4SNeilBrown gen_confirm(conf); 92246309029SNeilBrown nfsd4_remove_clid_dir(unconf); 9231a69c179SNeilBrown expire_client(unconf); 9241da177e4SLinus Torvalds status = nfs_ok; 9251a69c179SNeilBrown 9261da177e4SLinus Torvalds } 9277c79f737SNeilBrown } else if ((conf && !unconf) || 9281da177e4SLinus Torvalds ((conf && unconf) && 9291da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 930a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 9317c79f737SNeilBrown /* CASE 2: 9327c79f737SNeilBrown * conf record that matches input clientid. 9337c79f737SNeilBrown * if unconf record matches input clientid, then 9347c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 9357c79f737SNeilBrown * conf record. 9367c79f737SNeilBrown */ 93721ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 9381da177e4SLinus Torvalds status = nfserr_clid_inuse; 93921ab45a4SNeilBrown else 9401da177e4SLinus Torvalds status = nfs_ok; 9417c79f737SNeilBrown } else if (!conf && unconf 9427c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 9431da177e4SLinus Torvalds /* CASE 3: 9441da177e4SLinus Torvalds * conf record not found. 9451da177e4SLinus Torvalds * unconf record found. 9461da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9471da177e4SLinus Torvalds */ 9481da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9491da177e4SLinus Torvalds status = nfserr_clid_inuse; 9501da177e4SLinus Torvalds } else { 9511a69c179SNeilBrown unsigned int hash = 9521a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9531a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9541a69c179SNeilBrown hash); 9551a69c179SNeilBrown if (conf) { 956c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9571a69c179SNeilBrown expire_client(conf); 9581a69c179SNeilBrown } 9591da177e4SLinus Torvalds move_to_confirmed(unconf); 96021ab45a4SNeilBrown conf = unconf; 9611a69c179SNeilBrown status = nfs_ok; 9621da177e4SLinus Torvalds } 9637c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9647c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9657c79f737SNeilBrown &confirm)))) { 9661da177e4SLinus Torvalds /* CASE 4: 9677c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9681da177e4SLinus Torvalds * match input confirm. 9697c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9701da177e4SLinus Torvalds * does not match input confirm. 9711da177e4SLinus Torvalds */ 9721da177e4SLinus Torvalds status = nfserr_stale_clientid; 9737c79f737SNeilBrown } else { 9741da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 97522de4d83SNeilBrown status = nfserr_clid_inuse; 97608e8987cSNeilBrown } 9771da177e4SLinus Torvalds out: 9781da177e4SLinus Torvalds if (!status) 97921ab45a4SNeilBrown nfsd4_probe_callback(conf); 9801da177e4SLinus Torvalds nfs4_unlock_state(); 9811da177e4SLinus Torvalds return status; 9821da177e4SLinus Torvalds } 9831da177e4SLinus Torvalds 9841da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9851da177e4SLinus Torvalds static inline struct nfs4_file * 9861da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9871da177e4SLinus Torvalds { 9881da177e4SLinus Torvalds struct nfs4_file *fp; 9891da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9901da177e4SLinus Torvalds 991e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 992e60d4398SNeilBrown if (fp) { 99313cd2184SNeilBrown kref_init(&fp->fi_ref); 9941da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9958beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9968beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9971da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9981da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9991da177e4SLinus Torvalds fp->fi_id = current_fileid++; 10001da177e4SLinus Torvalds return fp; 10011da177e4SLinus Torvalds } 10021da177e4SLinus Torvalds return NULL; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds 10051da177e4SLinus Torvalds static void 1006e60d4398SNeilBrown nfsd4_free_slab(kmem_cache_t **slab) 1007e60d4398SNeilBrown { 1008e60d4398SNeilBrown if (*slab == NULL) 1009e60d4398SNeilBrown return; 10101a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 1011e60d4398SNeilBrown *slab = NULL; 1012e60d4398SNeilBrown } 1013e60d4398SNeilBrown 1014e60d4398SNeilBrown static void 1015e60d4398SNeilBrown nfsd4_free_slabs(void) 1016e60d4398SNeilBrown { 1017e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1018e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10195ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10205b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1021e60d4398SNeilBrown } 10221da177e4SLinus Torvalds 10231da177e4SLinus Torvalds static int 10241da177e4SLinus Torvalds nfsd4_init_slabs(void) 10251da177e4SLinus Torvalds { 10261da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 10271da177e4SLinus Torvalds sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1028e60d4398SNeilBrown if (stateowner_slab == NULL) 1029e60d4398SNeilBrown goto out_nomem; 1030e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 1031e60d4398SNeilBrown sizeof(struct nfs4_file), 0, 0, NULL, NULL); 1032e60d4398SNeilBrown if (file_slab == NULL) 1033e60d4398SNeilBrown goto out_nomem; 10345ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 10355ac049acSNeilBrown sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); 10365ac049acSNeilBrown if (stateid_slab == NULL) 10375ac049acSNeilBrown goto out_nomem; 10385b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 10395b2d21c1SNeilBrown sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); 10405b2d21c1SNeilBrown if (deleg_slab == NULL) 10415b2d21c1SNeilBrown goto out_nomem; 1042e60d4398SNeilBrown return 0; 1043e60d4398SNeilBrown out_nomem: 1044e60d4398SNeilBrown nfsd4_free_slabs(); 10451da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10461da177e4SLinus Torvalds return -ENOMEM; 10471da177e4SLinus Torvalds } 10481da177e4SLinus Torvalds 10491da177e4SLinus Torvalds void 10501da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10511da177e4SLinus Torvalds { 10521da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10531da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10541da177e4SLinus Torvalds kfree(sop->so_owner.data); 10551da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10561da177e4SLinus Torvalds } 10571da177e4SLinus Torvalds 10581da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10591da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10601da177e4SLinus Torvalds { 10611da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10621da177e4SLinus Torvalds 10631da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10641da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10651da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10661da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10671da177e4SLinus Torvalds kref_init(&sop->so_ref); 10681da177e4SLinus Torvalds return sop; 10691da177e4SLinus Torvalds } 10701da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds return NULL; 10731da177e4SLinus Torvalds } 10741da177e4SLinus Torvalds 10751da177e4SLinus Torvalds static struct nfs4_stateowner * 10761da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10771da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10781da177e4SLinus Torvalds struct nfs4_replay *rp; 10791da177e4SLinus Torvalds unsigned int idhashval; 10801da177e4SLinus Torvalds 10811da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10821da177e4SLinus Torvalds return NULL; 10831da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10841da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10851da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10861da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1087ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1088ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10891da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10901da177e4SLinus Torvalds sop->so_time = 0; 10911da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10921da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1093ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10941da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10951da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10961da177e4SLinus Torvalds sop->so_client = clp; 10971da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10981da177e4SLinus Torvalds sop->so_confirmed = 0; 10991da177e4SLinus Torvalds rp = &sop->so_replay; 1100de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11011da177e4SLinus Torvalds rp->rp_buflen = 0; 11021da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11031da177e4SLinus Torvalds return sop; 11041da177e4SLinus Torvalds } 11051da177e4SLinus Torvalds 11061da177e4SLinus Torvalds static void 11071da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11081da177e4SLinus Torvalds { 11091da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11101da177e4SLinus Torvalds 1111ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1112ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1113ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1114ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11151da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11161da177e4SLinus Torvalds release_stateowner(lock_sop); 11171da177e4SLinus Torvalds } 11181da177e4SLinus Torvalds } 11191da177e4SLinus Torvalds 11201da177e4SLinus Torvalds static void 11211da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11221da177e4SLinus Torvalds { 11231da177e4SLinus Torvalds struct nfs4_stateid *stp; 11241da177e4SLinus Torvalds 11251da177e4SLinus Torvalds list_del(&sop->so_idhash); 11261da177e4SLinus Torvalds list_del(&sop->so_strhash); 11276fa305deSNeilBrown if (sop->so_is_open_owner) 11281da177e4SLinus Torvalds list_del(&sop->so_perclient); 1129ea1da636SNeilBrown list_del(&sop->so_perstateid); 1130ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1131ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1132ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11331da177e4SLinus Torvalds if (sop->so_is_open_owner) 11341da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11351da177e4SLinus Torvalds else 11361da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static void 11411da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11421da177e4SLinus Torvalds { 11431da177e4SLinus Torvalds unhash_stateowner(sop); 11441da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11451da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11461da177e4SLinus Torvalds } 11471da177e4SLinus Torvalds 11481da177e4SLinus Torvalds static inline void 11491da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11501da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11511da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11521da177e4SLinus Torvalds 11531da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1154ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1155ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11561da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11571da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1158ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11598beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11601da177e4SLinus Torvalds stp->st_stateowner = sop; 116113cd2184SNeilBrown get_nfs4_file(fp); 11621da177e4SLinus Torvalds stp->st_file = fp; 11631da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11641da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11651da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11661da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11671da177e4SLinus Torvalds stp->st_access_bmap = 0; 11681da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11691da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11701da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11714c4cd222SNeilBrown stp->st_openstp = NULL; 11721da177e4SLinus Torvalds } 11731da177e4SLinus Torvalds 11741da177e4SLinus Torvalds static void 11751da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11761da177e4SLinus Torvalds { 11771da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11781da177e4SLinus Torvalds 11791da177e4SLinus Torvalds list_del(&stp->st_hash); 11801da177e4SLinus Torvalds list_del(&stp->st_perfile); 1181ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11821da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11831da177e4SLinus Torvalds release_stateid_lockowners(stp); 11841da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11851da177e4SLinus Torvalds nfsd_close(filp); 11861da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11871da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 118813cd2184SNeilBrown put_nfs4_file(stp->st_file); 11895ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11901da177e4SLinus Torvalds } 11911da177e4SLinus Torvalds 1192fd39ca9aSNeilBrown static void 11931da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11941da177e4SLinus Torvalds { 11951da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11961da177e4SLinus Torvalds 1197358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11981da177e4SLinus Torvalds sop->so_time = get_seconds(); 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds static int 12021da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 12031da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 12041da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 12051da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds static struct nfs4_stateowner * 12091da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12101da177e4SLinus Torvalds { 12111da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12121da177e4SLinus Torvalds 12131da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12141da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12151da177e4SLinus Torvalds return so; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds return NULL; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12211da177e4SLinus Torvalds static struct nfs4_file * 12221da177e4SLinus Torvalds find_file(struct inode *ino) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12251da177e4SLinus Torvalds struct nfs4_file *fp; 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 122813cd2184SNeilBrown if (fp->fi_inode == ino) { 122913cd2184SNeilBrown get_nfs4_file(fp); 12301da177e4SLinus Torvalds return fp; 12311da177e4SLinus Torvalds } 123213cd2184SNeilBrown } 12331da177e4SLinus Torvalds return NULL; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 1236ba5a6a19SJ. Bruce Fields static int access_valid(u32 x) 1237ba5a6a19SJ. Bruce Fields { 1238ba5a6a19SJ. Bruce Fields return (x > 0 && x < 4); 1239ba5a6a19SJ. Bruce Fields } 1240ba5a6a19SJ. Bruce Fields 1241ba5a6a19SJ. Bruce Fields static int deny_valid(u32 x) 1242ba5a6a19SJ. Bruce Fields { 1243ba5a6a19SJ. Bruce Fields return (x >= 0 && x < 5); 1244ba5a6a19SJ. Bruce Fields } 12451da177e4SLinus Torvalds 1246fd39ca9aSNeilBrown static void 12471da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12481da177e4SLinus Torvalds int i; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds *access = 0; 12511da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12521da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12531da177e4SLinus Torvalds *access |= i; 12541da177e4SLinus Torvalds } 12551da177e4SLinus Torvalds } 12561da177e4SLinus Torvalds 1257fd39ca9aSNeilBrown static void 12581da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12591da177e4SLinus Torvalds int i; 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds *deny = 0; 12621da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12631da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12641da177e4SLinus Torvalds *deny |= i ; 12651da177e4SLinus Torvalds } 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds static int 12691da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12701da177e4SLinus Torvalds unsigned int access, deny; 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12731da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12741da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12751da177e4SLinus Torvalds return 0; 12761da177e4SLinus Torvalds return 1; 12771da177e4SLinus Torvalds } 12781da177e4SLinus Torvalds 12791da177e4SLinus Torvalds /* 12801da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12811da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12821da177e4SLinus Torvalds */ 1283b37ad28bSAl Viro static __be32 12841da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12851da177e4SLinus Torvalds { 12861da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12871da177e4SLinus Torvalds struct nfs4_file *fp; 12881da177e4SLinus Torvalds struct nfs4_stateid *stp; 1289b37ad28bSAl Viro __be32 ret; 12901da177e4SLinus Torvalds 12911da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds fp = find_file(ino); 129413cd2184SNeilBrown if (!fp) 129513cd2184SNeilBrown return nfs_ok; 1296b700949bSNeilBrown ret = nfserr_locked; 12971da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12988beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12991da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 13001da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 130113cd2184SNeilBrown goto out; 13021da177e4SLinus Torvalds } 130313cd2184SNeilBrown ret = nfs_ok; 130413cd2184SNeilBrown out: 130513cd2184SNeilBrown put_nfs4_file(fp); 130613cd2184SNeilBrown return ret; 13071da177e4SLinus Torvalds } 13081da177e4SLinus Torvalds 13091da177e4SLinus Torvalds static inline void 13101da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13111da177e4SLinus Torvalds { 13121da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13131da177e4SLinus Torvalds put_write_access(filp->f_dentry->d_inode); 13141da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13151da177e4SLinus Torvalds } 13161da177e4SLinus Torvalds } 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds /* 13191da177e4SLinus Torvalds * Recall a delegation 13201da177e4SLinus Torvalds */ 13211da177e4SLinus Torvalds static int 13221da177e4SLinus Torvalds do_recall(void *__dp) 13231da177e4SLinus Torvalds { 13241da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13251da177e4SLinus Torvalds 13261da177e4SLinus Torvalds daemonize("nfsv4-recall"); 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13291da177e4SLinus Torvalds return 0; 13301da177e4SLinus Torvalds } 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds /* 13331da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13341da177e4SLinus Torvalds * by the lease (file_lock) 13351da177e4SLinus Torvalds * 13361da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13371da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13381da177e4SLinus Torvalds * lease. 13391da177e4SLinus Torvalds */ 13401da177e4SLinus Torvalds static 13411da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13421da177e4SLinus Torvalds { 13431da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13441da177e4SLinus Torvalds struct task_struct *t; 13451da177e4SLinus Torvalds 13461da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13471da177e4SLinus Torvalds if (!dp) 13481da177e4SLinus Torvalds return; 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13511da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13521da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13531da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13541da177e4SLinus Torvalds * it's safe to take a reference: */ 13551da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds spin_lock(&recall_lock); 13581da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13591da177e4SLinus Torvalds spin_unlock(&recall_lock); 13601da177e4SLinus Torvalds 13611da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13621da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13651da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13661da177e4SLinus Torvalds 13671da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13681da177e4SLinus Torvalds if (IS_ERR(t)) { 13691da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13721da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13731da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13741da177e4SLinus Torvalds nfs4_put_delegation(dp); 13751da177e4SLinus Torvalds } 13761da177e4SLinus Torvalds } 13771da177e4SLinus Torvalds 13781da177e4SLinus Torvalds /* 13791da177e4SLinus Torvalds * The file_lock is being reapd. 13801da177e4SLinus Torvalds * 13811da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13821da177e4SLinus Torvalds */ 13831da177e4SLinus Torvalds static 13841da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13851da177e4SLinus Torvalds { 13861da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13911da177e4SLinus Torvalds return; 13921da177e4SLinus Torvalds dp->dl_flock = NULL; 13931da177e4SLinus Torvalds } 13941da177e4SLinus Torvalds 13951da177e4SLinus Torvalds /* 13961da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13971da177e4SLinus Torvalds * 13981da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held. 13991da177e4SLinus Torvalds */ 14001da177e4SLinus Torvalds static 14011da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 14021da177e4SLinus Torvalds { 14031da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14041da177e4SLinus Torvalds 14051da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14061da177e4SLinus Torvalds if (!dp) 14071da177e4SLinus Torvalds return; 14081da177e4SLinus Torvalds dp->dl_flock = new; 14091da177e4SLinus Torvalds } 14101da177e4SLinus Torvalds 14111da177e4SLinus Torvalds /* 14121da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held 14131da177e4SLinus Torvalds */ 14141da177e4SLinus Torvalds static 14151da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14161da177e4SLinus Torvalds { 14171da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14181da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14191da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14201da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14231da177e4SLinus Torvalds return 0; 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14261da177e4SLinus Torvalds } 14271da177e4SLinus Torvalds 14281da177e4SLinus Torvalds 14291da177e4SLinus Torvalds static 14301da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14311da177e4SLinus Torvalds { 14321da177e4SLinus Torvalds if (arg & F_UNLCK) 14331da177e4SLinus Torvalds return lease_modify(onlist, arg); 14341da177e4SLinus Torvalds else 14351da177e4SLinus Torvalds return -EAGAIN; 14361da177e4SLinus Torvalds } 14371da177e4SLinus Torvalds 1438fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14391da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14401da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14411da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14421da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14431da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14441da177e4SLinus Torvalds }; 14451da177e4SLinus Torvalds 14461da177e4SLinus Torvalds 1447b37ad28bSAl Viro __be32 14481da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14491da177e4SLinus Torvalds { 14501da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14511da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14521da177e4SLinus Torvalds unsigned int strhashval; 14531da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14541da177e4SLinus Torvalds 14551da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14560f442aa2SJ. Bruce Fields return nfserr_inval; 14571da177e4SLinus Torvalds 14581da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14591da177e4SLinus Torvalds return nfserr_stale_clientid; 14601da177e4SLinus Torvalds 14611da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14621da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14631da177e4SLinus Torvalds open->op_stateowner = sop; 14640f442aa2SJ. Bruce Fields if (!sop) { 14650f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14660f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14670f442aa2SJ. Bruce Fields if (clp == NULL) 14680f442aa2SJ. Bruce Fields return nfserr_expired; 14690f442aa2SJ. Bruce Fields goto renew; 14700f442aa2SJ. Bruce Fields } 1471ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14720f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1473ae8b6253SJ. Bruce Fields clp = sop->so_client; 1474ae8b6253SJ. Bruce Fields release_stateowner(sop); 14750f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1476ae8b6253SJ. Bruce Fields goto renew; 14770f442aa2SJ. Bruce Fields } 14780f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14791da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 14801da177e4SLinus Torvalds return NFSERR_REPLAY_ME; 14811da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14821da177e4SLinus Torvalds * that we don't even have replay data saved! 14831da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14841da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14851da177e4SLinus Torvalds * fail again for the same reason. 14861da177e4SLinus Torvalds */ 14870f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14881da177e4SLinus Torvalds goto renew; 14891da177e4SLinus Torvalds } 14900f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14910f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14920f442aa2SJ. Bruce Fields renew: 14930f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14941da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14951da177e4SLinus Torvalds if (sop == NULL) 14960f442aa2SJ. Bruce Fields return nfserr_resource; 14971da177e4SLinus Torvalds open->op_stateowner = sop; 14980f442aa2SJ. Bruce Fields } 14990f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 15001da177e4SLinus Torvalds renew_client(sop->so_client); 15010f442aa2SJ. Bruce Fields return nfs_ok; 15021da177e4SLinus Torvalds } 15031da177e4SLinus Torvalds 1504b37ad28bSAl Viro static inline __be32 15054a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15064a6e43e6SNeilBrown { 15074a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15084a6e43e6SNeilBrown return nfserr_openmode; 15094a6e43e6SNeilBrown else 15104a6e43e6SNeilBrown return nfs_ok; 15114a6e43e6SNeilBrown } 15124a6e43e6SNeilBrown 151352f4fb43SNeilBrown static struct nfs4_delegation * 151452f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 151552f4fb43SNeilBrown { 151652f4fb43SNeilBrown struct nfs4_delegation *dp; 151752f4fb43SNeilBrown 1518ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 151952f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 152052f4fb43SNeilBrown return dp; 152152f4fb43SNeilBrown } 152252f4fb43SNeilBrown return NULL; 152352f4fb43SNeilBrown } 152452f4fb43SNeilBrown 1525b37ad28bSAl Viro static __be32 1526567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1527567d9829SNeilBrown struct nfs4_delegation **dp) 1528567d9829SNeilBrown { 1529567d9829SNeilBrown int flags; 1530b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1531567d9829SNeilBrown 1532567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1533567d9829SNeilBrown if (*dp == NULL) 1534c44c5eebSNeilBrown goto out; 1535567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1536567d9829SNeilBrown RD_STATE : WR_STATE; 1537567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1538567d9829SNeilBrown if (status) 1539567d9829SNeilBrown *dp = NULL; 1540c44c5eebSNeilBrown out: 1541c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1542c44c5eebSNeilBrown return nfs_ok; 1543c44c5eebSNeilBrown if (status) 1544c44c5eebSNeilBrown return status; 1545c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1546c44c5eebSNeilBrown return nfs_ok; 1547567d9829SNeilBrown } 1548567d9829SNeilBrown 1549b37ad28bSAl Viro static __be32 15501da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15511da177e4SLinus Torvalds { 15521da177e4SLinus Torvalds struct nfs4_stateid *local; 1553b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15541da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15551da177e4SLinus Torvalds 15568beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15571da177e4SLinus Torvalds /* ignore lock owners */ 15581da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15591da177e4SLinus Torvalds continue; 15601da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15611da177e4SLinus Torvalds if (local->st_stateowner == sop) 15621da177e4SLinus Torvalds *stpp = local; 15631da177e4SLinus Torvalds /* check for conflicting share reservations */ 15641da177e4SLinus Torvalds if (!test_share(local, open)) 15651da177e4SLinus Torvalds goto out; 15661da177e4SLinus Torvalds } 15671da177e4SLinus Torvalds status = 0; 15681da177e4SLinus Torvalds out: 15691da177e4SLinus Torvalds return status; 15701da177e4SLinus Torvalds } 15711da177e4SLinus Torvalds 15725ac049acSNeilBrown static inline struct nfs4_stateid * 15735ac049acSNeilBrown nfs4_alloc_stateid(void) 15745ac049acSNeilBrown { 15755ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15765ac049acSNeilBrown } 15775ac049acSNeilBrown 1578b37ad28bSAl Viro static __be32 15791da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1580567d9829SNeilBrown struct nfs4_delegation *dp, 15811da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15821da177e4SLinus Torvalds { 15831da177e4SLinus Torvalds struct nfs4_stateid *stp; 15841da177e4SLinus Torvalds 15855ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15861da177e4SLinus Torvalds if (stp == NULL) 15871da177e4SLinus Torvalds return nfserr_resource; 15881da177e4SLinus Torvalds 1589567d9829SNeilBrown if (dp) { 1590567d9829SNeilBrown get_file(dp->dl_vfs_file); 1591567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1592567d9829SNeilBrown } else { 1593b37ad28bSAl Viro __be32 status; 1594567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1595567d9829SNeilBrown &stp->st_vfs_file); 15961da177e4SLinus Torvalds if (status) { 15971da177e4SLinus Torvalds if (status == nfserr_dropit) 15981da177e4SLinus Torvalds status = nfserr_jukebox; 15995ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 16001da177e4SLinus Torvalds return status; 16011da177e4SLinus Torvalds } 1602567d9829SNeilBrown } 16031da177e4SLinus Torvalds *stpp = stp; 16041da177e4SLinus Torvalds return 0; 16051da177e4SLinus Torvalds } 16061da177e4SLinus Torvalds 1607b37ad28bSAl Viro static inline __be32 16081da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16091da177e4SLinus Torvalds struct nfsd4_open *open) 16101da177e4SLinus Torvalds { 16111da177e4SLinus Torvalds struct iattr iattr = { 16121da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16131da177e4SLinus Torvalds .ia_size = 0, 16141da177e4SLinus Torvalds }; 16151da177e4SLinus Torvalds if (!open->op_truncate) 16161da177e4SLinus Torvalds return 0; 16171da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16189246585aSAl Viro return nfserr_inval; 16191da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16201da177e4SLinus Torvalds } 16211da177e4SLinus Torvalds 1622b37ad28bSAl Viro static __be32 16231da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16241da177e4SLinus Torvalds { 16251da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16261da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 16276c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1628b37ad28bSAl Viro __be32 status; 16291da177e4SLinus Torvalds 16301da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16316c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16326c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16331da177e4SLinus Torvalds 16346c26d08fSJ. Bruce Fields if (new_writer) { 1635b37ad28bSAl Viro int err = get_write_access(inode); 1636b37ad28bSAl Viro if (err) 1637b37ad28bSAl Viro return nfserrno(err); 16386c26d08fSJ. Bruce Fields } 16391da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16401da177e4SLinus Torvalds if (status) { 16416c26d08fSJ. Bruce Fields if (new_writer) 16421da177e4SLinus Torvalds put_write_access(inode); 16431da177e4SLinus Torvalds return status; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds /* remember the open */ 16466c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16471da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16481da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16491da177e4SLinus Torvalds 16501da177e4SLinus Torvalds return nfs_ok; 16511da177e4SLinus Torvalds } 16521da177e4SLinus Torvalds 16531da177e4SLinus Torvalds 16541da177e4SLinus Torvalds static void 165537515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16561da177e4SLinus Torvalds { 16571da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1658c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16591da177e4SLinus Torvalds } 16601da177e4SLinus Torvalds 16611da177e4SLinus Torvalds /* 16621da177e4SLinus Torvalds * Attempt to hand out a delegation. 16631da177e4SLinus Torvalds */ 16641da177e4SLinus Torvalds static void 16651da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16661da177e4SLinus Torvalds { 16671da177e4SLinus Torvalds struct nfs4_delegation *dp; 16681da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16691da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16701da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16711da177e4SLinus Torvalds int status, flag = 0; 16721da177e4SLinus Torvalds 16731da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16747b190fecSNeilBrown open->op_recall = 0; 16757b190fecSNeilBrown switch (open->op_claim_type) { 16767b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16777b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16787b190fecSNeilBrown open->op_recall = 1; 16797b190fecSNeilBrown flag = open->op_delegate_type; 16807b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16811da177e4SLinus Torvalds goto out; 16827b190fecSNeilBrown break; 16837b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16847b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16857b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16867b190fecSNeilBrown if (nfs4_in_grace()) 16877b190fecSNeilBrown goto out; 16887b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16897b190fecSNeilBrown goto out; 16901da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16911da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16921da177e4SLinus Torvalds else 16931da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16947b190fecSNeilBrown break; 16957b190fecSNeilBrown default: 16967b190fecSNeilBrown goto out; 16977b190fecSNeilBrown } 16981da177e4SLinus Torvalds 16991da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 17001da177e4SLinus Torvalds if (dp == NULL) { 17011da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17021da177e4SLinus Torvalds goto out; 17031da177e4SLinus Torvalds } 17041da177e4SLinus Torvalds locks_init_lock(&fl); 17051da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17061da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17071da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17081da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17091da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17101da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17111da177e4SLinus Torvalds 17121da177e4SLinus Torvalds /* setlease checks to see if delegation should be handed out. 17131da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17141da177e4SLinus Torvalds */ 17151da177e4SLinus Torvalds if ((status = setlease(stp->st_vfs_file, 17161da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17171da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1718c907132dSNeilBrown unhash_delegation(dp); 17191da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17201da177e4SLinus Torvalds goto out; 17211da177e4SLinus Torvalds } 17221da177e4SLinus Torvalds 17231da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17241da177e4SLinus Torvalds 17251da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17261da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17271da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17281da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17291da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17301da177e4SLinus Torvalds out: 17317b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17327b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17337b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17347b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17351da177e4SLinus Torvalds open->op_delegate_type = flag; 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds 17381da177e4SLinus Torvalds /* 17391da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17401da177e4SLinus Torvalds */ 1741b37ad28bSAl Viro __be32 17421da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17431da177e4SLinus Torvalds { 17441da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17451da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17461da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1747567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1748b37ad28bSAl Viro __be32 status; 17491da177e4SLinus Torvalds 17501da177e4SLinus Torvalds status = nfserr_inval; 1751ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1752ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17531da177e4SLinus Torvalds goto out; 17541da177e4SLinus Torvalds /* 17551da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17561da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17571da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17581da177e4SLinus Torvalds */ 17591da177e4SLinus Torvalds fp = find_file(ino); 17601da177e4SLinus Torvalds if (fp) { 17611da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17621da177e4SLinus Torvalds goto out; 1763c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1764c44c5eebSNeilBrown if (status) 1765c44c5eebSNeilBrown goto out; 17661da177e4SLinus Torvalds } else { 1767c44c5eebSNeilBrown status = nfserr_bad_stateid; 1768c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1769c44c5eebSNeilBrown goto out; 17701da177e4SLinus Torvalds status = nfserr_resource; 17711da177e4SLinus Torvalds fp = alloc_init_file(ino); 17721da177e4SLinus Torvalds if (fp == NULL) 17731da177e4SLinus Torvalds goto out; 17741da177e4SLinus Torvalds } 17751da177e4SLinus Torvalds 17761da177e4SLinus Torvalds /* 17771da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17781da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17791da177e4SLinus Torvalds */ 17801da177e4SLinus Torvalds if (stp) { 17811da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17821da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17831da177e4SLinus Torvalds if (status) 17841da177e4SLinus Torvalds goto out; 1785444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17861da177e4SLinus Torvalds } else { 17871da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17881da177e4SLinus Torvalds int flags = 0; 17899ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17909ecb6a08SJ. Bruce Fields flags |= MAY_READ; 17911da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17929ecb6a08SJ. Bruce Fields flags |= MAY_WRITE; 1793567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1794567d9829SNeilBrown if (status) 17951da177e4SLinus Torvalds goto out; 17961da177e4SLinus Torvalds init_stateid(stp, fp, open); 17971da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17981da177e4SLinus Torvalds if (status) { 17991da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 18001da177e4SLinus Torvalds goto out; 18011da177e4SLinus Torvalds } 18021da177e4SLinus Torvalds } 18031da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18041da177e4SLinus Torvalds 18051da177e4SLinus Torvalds /* 18061da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18071da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18081da177e4SLinus Torvalds */ 18091da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18101da177e4SLinus Torvalds 18111da177e4SLinus Torvalds status = nfs_ok; 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18141da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18151da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18161da177e4SLinus Torvalds out: 181713cd2184SNeilBrown if (fp) 181813cd2184SNeilBrown put_nfs4_file(fp); 181937515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 182037515177SNeilBrown nfs4_set_claim_prev(open); 18211da177e4SLinus Torvalds /* 18221da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18231da177e4SLinus Torvalds */ 18241da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18251da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18261da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18271da177e4SLinus Torvalds 18281da177e4SLinus Torvalds return status; 18291da177e4SLinus Torvalds } 18301da177e4SLinus Torvalds 183158da282bSNeilBrown static struct workqueue_struct *laundry_wq; 18321da177e4SLinus Torvalds static struct work_struct laundromat_work; 18331da177e4SLinus Torvalds static void laundromat_main(void *); 18341da177e4SLinus Torvalds static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 18351da177e4SLinus Torvalds 1836b37ad28bSAl Viro __be32 18371da177e4SLinus Torvalds nfsd4_renew(clientid_t *clid) 18381da177e4SLinus Torvalds { 18391da177e4SLinus Torvalds struct nfs4_client *clp; 1840b37ad28bSAl Viro __be32 status; 18411da177e4SLinus Torvalds 18421da177e4SLinus Torvalds nfs4_lock_state(); 18431da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18441da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18451da177e4SLinus Torvalds status = nfserr_stale_clientid; 18461da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18471da177e4SLinus Torvalds goto out; 18481da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18491da177e4SLinus Torvalds status = nfserr_expired; 18501da177e4SLinus Torvalds if (clp == NULL) { 18511da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18521da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18531da177e4SLinus Torvalds goto out; 18541da177e4SLinus Torvalds } 18551da177e4SLinus Torvalds renew_client(clp); 18561da177e4SLinus Torvalds status = nfserr_cb_path_down; 1857ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18581da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18591da177e4SLinus Torvalds goto out; 18601da177e4SLinus Torvalds status = nfs_ok; 18611da177e4SLinus Torvalds out: 18621da177e4SLinus Torvalds nfs4_unlock_state(); 18631da177e4SLinus Torvalds return status; 18641da177e4SLinus Torvalds } 18651da177e4SLinus Torvalds 1866a76b4319SNeilBrown static void 1867a76b4319SNeilBrown end_grace(void) 1868a76b4319SNeilBrown { 1869a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1870c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1871a76b4319SNeilBrown in_grace = 0; 1872a76b4319SNeilBrown } 1873a76b4319SNeilBrown 1874fd39ca9aSNeilBrown static time_t 18751da177e4SLinus Torvalds nfs4_laundromat(void) 18761da177e4SLinus Torvalds { 18771da177e4SLinus Torvalds struct nfs4_client *clp; 18781da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18791da177e4SLinus Torvalds struct nfs4_delegation *dp; 18801da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18811da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18821da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18831da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18841da177e4SLinus Torvalds 18851da177e4SLinus Torvalds nfs4_lock_state(); 18861da177e4SLinus Torvalds 18871da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1888a76b4319SNeilBrown if (in_grace) 1889a76b4319SNeilBrown end_grace(); 18901da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18911da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18921da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18931da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18941da177e4SLinus Torvalds if (clientid_val > t) 18951da177e4SLinus Torvalds clientid_val = t; 18961da177e4SLinus Torvalds break; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18991da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1900c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 19011da177e4SLinus Torvalds expire_client(clp); 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19041da177e4SLinus Torvalds spin_lock(&recall_lock); 19051da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19061da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19071da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19081da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19091da177e4SLinus Torvalds if (test_val > u) 19101da177e4SLinus Torvalds test_val = u; 19111da177e4SLinus Torvalds break; 19121da177e4SLinus Torvalds } 19131da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19141da177e4SLinus Torvalds dp, dp->dl_flock); 19151da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds spin_unlock(&recall_lock); 19181da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19191da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19201da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19211da177e4SLinus Torvalds unhash_delegation(dp); 19221da177e4SLinus Torvalds } 19231da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19241da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19251da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19261da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19271da177e4SLinus Torvalds u = sop->so_time - cutoff; 19281da177e4SLinus Torvalds if (test_val > u) 19291da177e4SLinus Torvalds test_val = u; 19301da177e4SLinus Torvalds break; 19311da177e4SLinus Torvalds } 19321da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19331da177e4SLinus Torvalds sop->so_id); 1934358dd55aSNeilBrown release_stateowner(sop); 19351da177e4SLinus Torvalds } 19361da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19371da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19381da177e4SLinus Torvalds nfs4_unlock_state(); 19391da177e4SLinus Torvalds return clientid_val; 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds 19421da177e4SLinus Torvalds void 19431da177e4SLinus Torvalds laundromat_main(void *not_used) 19441da177e4SLinus Torvalds { 19451da177e4SLinus Torvalds time_t t; 19461da177e4SLinus Torvalds 19471da177e4SLinus Torvalds t = nfs4_laundromat(); 19481da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 194958da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19501da177e4SLinus Torvalds } 19511da177e4SLinus Torvalds 1952fd39ca9aSNeilBrown static struct nfs4_stateowner * 1953f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1954f8816512SNeilBrown { 19551da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19561da177e4SLinus Torvalds 19571da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19581da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19591da177e4SLinus Torvalds if (local->so_id == st_id) 19601da177e4SLinus Torvalds return local; 19611da177e4SLinus Torvalds } 19621da177e4SLinus Torvalds } 19631da177e4SLinus Torvalds return NULL; 19641da177e4SLinus Torvalds } 19651da177e4SLinus Torvalds 19661da177e4SLinus Torvalds static inline int 19671da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19681da177e4SLinus Torvalds { 19691da177e4SLinus Torvalds return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 19701da177e4SLinus Torvalds } 19711da177e4SLinus Torvalds 19721da177e4SLinus Torvalds static int 19731da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19741da177e4SLinus Torvalds { 19751da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19761da177e4SLinus Torvalds return 0; 1977849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19781da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19791da177e4SLinus Torvalds stateid->si_generation); 19801da177e4SLinus Torvalds return 1; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 19831da177e4SLinus Torvalds static inline int 19841da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19851da177e4SLinus Torvalds { 19861da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19871da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19881da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds static inline int 19921da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19931da177e4SLinus Torvalds { 19941da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19951da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19961da177e4SLinus Torvalds } 19971da177e4SLinus Torvalds 19981da177e4SLinus Torvalds static 1999b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 20001da177e4SLinus Torvalds { 2001b37ad28bSAl Viro __be32 status = nfserr_openmode; 20021da177e4SLinus Torvalds 20031da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20041da177e4SLinus Torvalds goto out; 20051da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20061da177e4SLinus Torvalds goto out; 20071da177e4SLinus Torvalds status = nfs_ok; 20081da177e4SLinus Torvalds out: 20091da177e4SLinus Torvalds return status; 20101da177e4SLinus Torvalds } 20111da177e4SLinus Torvalds 2012b37ad28bSAl Viro static inline __be32 20131da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20141da177e4SLinus Torvalds { 20151da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20161da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20171da177e4SLinus Torvalds return nfserr_bad_stateid; 20181da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20191da177e4SLinus Torvalds return nfs_ok; 20201da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20211da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20221da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20231da177e4SLinus Torvalds return nfserr_grace; 20241da177e4SLinus Torvalds } else if (flags & WR_STATE) 20251da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20261da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20271da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20281da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20291da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20301da177e4SLinus Torvalds } 20311da177e4SLinus Torvalds 20321da177e4SLinus Torvalds /* 20331da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20341da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20351da177e4SLinus Torvalds */ 20361da177e4SLinus Torvalds static inline int 20371da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20381da177e4SLinus Torvalds { 20391da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 20401da177e4SLinus Torvalds && MANDATORY_LOCK(inode); 20411da177e4SLinus Torvalds } 20421da177e4SLinus Torvalds 20431da177e4SLinus Torvalds /* 20441da177e4SLinus Torvalds * Checks for stateid operations 20451da177e4SLinus Torvalds */ 2046b37ad28bSAl Viro __be32 20471da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20481da177e4SLinus Torvalds { 20491da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20501da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20511da177e4SLinus Torvalds stateid_t *stidp; 20521da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2053b37ad28bSAl Viro __be32 status; 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20561da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20571da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20581da177e4SLinus Torvalds if (filpp) 20591da177e4SLinus Torvalds *filpp = NULL; 20601da177e4SLinus Torvalds 20611da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20621da177e4SLinus Torvalds return nfserr_grace; 20631da177e4SLinus Torvalds 20641da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20651da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20661da177e4SLinus Torvalds 20671da177e4SLinus Torvalds /* STALE STATEID */ 20681da177e4SLinus Torvalds status = nfserr_stale_stateid; 20691da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20701da177e4SLinus Torvalds goto out; 20711da177e4SLinus Torvalds 20721da177e4SLinus Torvalds /* BAD STATEID */ 20731da177e4SLinus Torvalds status = nfserr_bad_stateid; 20741da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20751da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20761da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20771da177e4SLinus Torvalds goto out; 20781da177e4SLinus Torvalds } 20791da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20801da177e4SLinus Torvalds } else { /* open or lock stateid */ 20811da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20821da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 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 */ 2128b37ad28bSAl Viro static __be32 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; 2172b37ad28bSAl Viro __be32 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 2244b37ad28bSAl Viro __be32 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 { 2247b37ad28bSAl Viro __be32 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 2255a8cddc5dSJ. Bruce Fields status = fh_verify(rqstp, current_fh, S_IFREG, 0); 2256a8cddc5dSJ. Bruce Fields if (status) 2257a8cddc5dSJ. Bruce Fields return status; 22581da177e4SLinus Torvalds 22591da177e4SLinus Torvalds nfs4_lock_state(); 22601da177e4SLinus Torvalds 22611da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 22621da177e4SLinus Torvalds &oc->oc_req_stateid, 22631da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22641da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22651da177e4SLinus Torvalds goto out; 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds sop = oc->oc_stateowner; 22681da177e4SLinus Torvalds sop->so_confirmed = 1; 22691da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22701da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22711da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22721da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22731da177e4SLinus Torvalds stp->st_stateid.si_boot, 22741da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22751da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22761da177e4SLinus Torvalds stp->st_stateid.si_generation); 2277c7b9a459SNeilBrown 2278c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22791da177e4SLinus Torvalds out: 2280f2327d9aSNeil Brown if (oc->oc_stateowner) { 22811da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2282f2327d9aSNeil Brown *replay_owner = oc->oc_stateowner; 2283f2327d9aSNeil Brown } 22841da177e4SLinus Torvalds nfs4_unlock_state(); 22851da177e4SLinus Torvalds return status; 22861da177e4SLinus Torvalds } 22871da177e4SLinus Torvalds 22881da177e4SLinus Torvalds 22891da177e4SLinus Torvalds /* 22901da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22911da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22921da177e4SLinus Torvalds */ 22931da177e4SLinus Torvalds static void 22941da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22951da177e4SLinus Torvalds { 22961da177e4SLinus Torvalds int i; 22971da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22981da177e4SLinus Torvalds if ((i & access) != i) 22991da177e4SLinus Torvalds __clear_bit(i, bmap); 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds } 23021da177e4SLinus Torvalds 23031da177e4SLinus Torvalds static void 23041da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23051da177e4SLinus Torvalds { 23061da177e4SLinus Torvalds int i; 23071da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23081da177e4SLinus Torvalds if ((i & deny) != i) 23091da177e4SLinus Torvalds __clear_bit(i, bmap); 23101da177e4SLinus Torvalds } 23111da177e4SLinus Torvalds } 23121da177e4SLinus Torvalds 2313b37ad28bSAl Viro __be32 2314f2327d9aSNeil Brown nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) 23151da177e4SLinus Torvalds { 2316b37ad28bSAl Viro __be32 status; 23171da177e4SLinus Torvalds struct nfs4_stateid *stp; 23181da177e4SLinus Torvalds unsigned int share_access; 23191da177e4SLinus Torvalds 23201da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 23211da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23221da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23231da177e4SLinus Torvalds 2324ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2325ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23261da177e4SLinus Torvalds return nfserr_inval; 23271da177e4SLinus Torvalds 23281da177e4SLinus Torvalds nfs4_lock_state(); 23291da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 23301da177e4SLinus Torvalds &od->od_stateid, 23311da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23321da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23331da177e4SLinus Torvalds goto out; 23341da177e4SLinus Torvalds 23351da177e4SLinus Torvalds status = nfserr_inval; 23361da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23371da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23381da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23391da177e4SLinus Torvalds goto out; 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23421da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23431da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23441da177e4SLinus Torvalds goto out; 23451da177e4SLinus Torvalds } 23461da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23471da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23481da177e4SLinus Torvalds share_access & ~od->od_share_access); 23491da177e4SLinus Torvalds 23501da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23511da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23521da177e4SLinus Torvalds 23531da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23541da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23551da177e4SLinus Torvalds status = nfs_ok; 23561da177e4SLinus Torvalds out: 2357f2327d9aSNeil Brown if (od->od_stateowner) { 23581da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2359f2327d9aSNeil Brown *replay_owner = od->od_stateowner; 2360f2327d9aSNeil Brown } 23611da177e4SLinus Torvalds nfs4_unlock_state(); 23621da177e4SLinus Torvalds return status; 23631da177e4SLinus Torvalds } 23641da177e4SLinus Torvalds 23651da177e4SLinus Torvalds /* 23661da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23671da177e4SLinus Torvalds */ 2368b37ad28bSAl Viro __be32 2369f2327d9aSNeil Brown nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) 23701da177e4SLinus Torvalds { 2371b37ad28bSAl Viro __be32 status; 23721da177e4SLinus Torvalds struct nfs4_stateid *stp; 23731da177e4SLinus Torvalds 23741da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 23751da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23761da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23771da177e4SLinus Torvalds 23781da177e4SLinus Torvalds nfs4_lock_state(); 23791da177e4SLinus Torvalds /* check close_lru for replay */ 23801da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 23811da177e4SLinus Torvalds &close->cl_stateid, 23821da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23831da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23841da177e4SLinus Torvalds goto out; 23851da177e4SLinus Torvalds status = nfs_ok; 23861da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23871da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23881da177e4SLinus Torvalds 238904ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 239004ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 239104ef5954SJ. Bruce Fields 239204ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 239304ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 239404ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 239504ef5954SJ. Bruce Fields */ 239604ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 239704ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23981da177e4SLinus Torvalds out: 2399f2327d9aSNeil Brown if (close->cl_stateowner) { 24001da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2401f2327d9aSNeil Brown *replay_owner = close->cl_stateowner; 2402f2327d9aSNeil Brown } 24031da177e4SLinus Torvalds nfs4_unlock_state(); 24041da177e4SLinus Torvalds return status; 24051da177e4SLinus Torvalds } 24061da177e4SLinus Torvalds 2407b37ad28bSAl Viro __be32 24081da177e4SLinus Torvalds nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 24091da177e4SLinus Torvalds { 2410b37ad28bSAl Viro __be32 status; 24111da177e4SLinus Torvalds 24121da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 24131da177e4SLinus Torvalds goto out; 24141da177e4SLinus Torvalds 24151da177e4SLinus Torvalds nfs4_lock_state(); 24161da177e4SLinus Torvalds status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 24171da177e4SLinus Torvalds nfs4_unlock_state(); 24181da177e4SLinus Torvalds out: 24191da177e4SLinus Torvalds return status; 24201da177e4SLinus Torvalds } 24211da177e4SLinus Torvalds 24221da177e4SLinus Torvalds 24231da177e4SLinus Torvalds /* 24241da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24251da177e4SLinus Torvalds */ 24261da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24271da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24281da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24291da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24321da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24331da177e4SLinus Torvalds 24341da177e4SLinus Torvalds static inline unsigned int 24351da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24361da177e4SLinus Torvalds struct xdr_netobj *ownername) 24371da177e4SLinus Torvalds { 24381da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24391da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24401da177e4SLinus Torvalds & LOCK_HASH_MASK; 24411da177e4SLinus Torvalds } 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24441da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24451da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24461da177e4SLinus Torvalds 2447fd39ca9aSNeilBrown static struct nfs4_stateid * 24481da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24491da177e4SLinus Torvalds { 24501da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24511da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24521da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24531da177e4SLinus Torvalds unsigned int hashval; 24541da177e4SLinus Torvalds 24551da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24561da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24571da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24581da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24591da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24601da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24611da177e4SLinus Torvalds return local; 24621da177e4SLinus Torvalds } 24631da177e4SLinus Torvalds } 24641da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24651da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24661da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24671da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24681da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24691da177e4SLinus Torvalds return local; 24701da177e4SLinus Torvalds } 2471849823c5SNeil Brown } 24721da177e4SLinus Torvalds return NULL; 24731da177e4SLinus Torvalds } 24741da177e4SLinus Torvalds 24751da177e4SLinus Torvalds static struct nfs4_delegation * 24761da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24771da177e4SLinus Torvalds { 247813cd2184SNeilBrown struct nfs4_file *fp; 247913cd2184SNeilBrown struct nfs4_delegation *dl; 24801da177e4SLinus Torvalds 24811da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24821da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24831da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24841da177e4SLinus Torvalds 24851da177e4SLinus Torvalds fp = find_file(ino); 248613cd2184SNeilBrown if (!fp) 24871da177e4SLinus Torvalds return NULL; 248813cd2184SNeilBrown dl = find_delegation_file(fp, stid); 248913cd2184SNeilBrown put_nfs4_file(fp); 249013cd2184SNeilBrown return dl; 24911da177e4SLinus Torvalds } 24921da177e4SLinus Torvalds 24931da177e4SLinus Torvalds /* 24941da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24951da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24961da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24971da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24981da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24991da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25001da177e4SLinus Torvalds */ 25011da177e4SLinus Torvalds static inline void 25021da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25031da177e4SLinus Torvalds { 25041da177e4SLinus Torvalds if (lock->fl_start < 0) 25051da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25061da177e4SLinus Torvalds if (lock->fl_end < 0) 25071da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25081da177e4SLinus Torvalds } 25091da177e4SLinus Torvalds 2510d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2511d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2512e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2513d5b9026aSNeilBrown }; 25141da177e4SLinus Torvalds 25151da177e4SLinus Torvalds static inline void 25161da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25171da177e4SLinus Torvalds { 2518d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2519d5b9026aSNeilBrown unsigned int hval; 25201da177e4SLinus Torvalds 2521d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2522d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2523d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25241da177e4SLinus Torvalds kref_get(&sop->so_ref); 25251da177e4SLinus Torvalds deny->ld_sop = sop; 25261da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2527d5b9026aSNeilBrown } else { 2528d5b9026aSNeilBrown deny->ld_sop = NULL; 2529d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2530d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25311da177e4SLinus Torvalds } 25321da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25331da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25341da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25351da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25361da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25371da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25381da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25391da177e4SLinus Torvalds } 25401da177e4SLinus Torvalds 25411da177e4SLinus Torvalds static struct nfs4_stateowner * 25421da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25431da177e4SLinus Torvalds struct xdr_netobj *owner) 25441da177e4SLinus Torvalds { 25451da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25461da177e4SLinus Torvalds struct nfs4_stateowner *op; 25471da177e4SLinus Torvalds 25481da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25491da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25501da177e4SLinus Torvalds return op; 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds return NULL; 25531da177e4SLinus Torvalds } 25541da177e4SLinus Torvalds 25551da177e4SLinus Torvalds /* 25561da177e4SLinus Torvalds * Alloc a lock owner structure. 25571da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25581da177e4SLinus Torvalds * occured. 25591da177e4SLinus Torvalds * 25601da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25611da177e4SLinus Torvalds */ 25621da177e4SLinus Torvalds 25631da177e4SLinus Torvalds static struct nfs4_stateowner * 25641da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25651da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25661da177e4SLinus Torvalds struct nfs4_replay *rp; 25671da177e4SLinus Torvalds unsigned int idhashval; 25681da177e4SLinus Torvalds 25691da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25701da177e4SLinus Torvalds return NULL; 25711da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25721da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25731da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25741da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2575ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2576ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25771da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25781da177e4SLinus Torvalds sop->so_time = 0; 25791da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25801da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2581ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25821da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25831da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25841da177e4SLinus Torvalds sop->so_client = clp; 2585b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2586b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2587b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25881da177e4SLinus Torvalds sop->so_confirmed = 1; 25891da177e4SLinus Torvalds rp = &sop->so_replay; 2590de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25911da177e4SLinus Torvalds rp->rp_buflen = 0; 25921da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25931da177e4SLinus Torvalds return sop; 25941da177e4SLinus Torvalds } 25951da177e4SLinus Torvalds 2596fd39ca9aSNeilBrown static struct nfs4_stateid * 25971da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25981da177e4SLinus Torvalds { 25991da177e4SLinus Torvalds struct nfs4_stateid *stp; 26001da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26011da177e4SLinus Torvalds 26025ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26035ac049acSNeilBrown if (stp == NULL) 26041da177e4SLinus Torvalds goto out; 26051da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26061da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2607ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2608ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26091da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26108beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2611ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26121da177e4SLinus Torvalds stp->st_stateowner = sop; 261313cd2184SNeilBrown get_nfs4_file(fp); 26141da177e4SLinus Torvalds stp->st_file = fp; 26151da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26161da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26171da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26181da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26191da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26201da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26211da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26224c4cd222SNeilBrown stp->st_openstp = open_stp; 26231da177e4SLinus Torvalds 26241da177e4SLinus Torvalds out: 26251da177e4SLinus Torvalds return stp; 26261da177e4SLinus Torvalds } 26271da177e4SLinus Torvalds 2628fd39ca9aSNeilBrown static int 26291da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26301da177e4SLinus Torvalds { 26311da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26321da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26331da177e4SLinus Torvalds } 26341da177e4SLinus Torvalds 26351da177e4SLinus Torvalds /* 26361da177e4SLinus Torvalds * LOCK operation 26371da177e4SLinus Torvalds */ 2638b37ad28bSAl Viro __be32 2639f2327d9aSNeil Brown nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) 26401da177e4SLinus Torvalds { 26413e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2642b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26431da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26441da177e4SLinus Torvalds struct file *filp; 26451da177e4SLinus Torvalds struct file_lock file_lock; 26468dc7c311SAndy Adamson struct file_lock conflock; 2647b37ad28bSAl Viro __be32 status = 0; 26481da177e4SLinus Torvalds unsigned int strhashval; 2649b8dd7b9aSAl Viro int err; 26501da177e4SLinus Torvalds 26511da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26521da177e4SLinus Torvalds (long long) lock->lk_offset, 26531da177e4SLinus Torvalds (long long) lock->lk_length); 26541da177e4SLinus Torvalds 26551da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26561da177e4SLinus Torvalds return nfserr_inval; 26571da177e4SLinus Torvalds 2658a6f6ef2fSAndy Adamson if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 2659a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2660a6f6ef2fSAndy Adamson return status; 2661a6f6ef2fSAndy Adamson } 2662a6f6ef2fSAndy Adamson 26631da177e4SLinus Torvalds nfs4_lock_state(); 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds if (lock->lk_is_new) { 26661da177e4SLinus Torvalds /* 26671da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2668893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2669893f8770SNeilBrown * lock stateid. 26701da177e4SLinus Torvalds */ 26711da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26721da177e4SLinus Torvalds struct nfs4_file *fp; 26731da177e4SLinus Torvalds 26741da177e4SLinus Torvalds status = nfserr_stale_clientid; 2675849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26761da177e4SLinus Torvalds goto out; 26771da177e4SLinus Torvalds 26781da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 26791da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 26801da177e4SLinus Torvalds lock->lk_new_open_seqid, 26811da177e4SLinus Torvalds &lock->lk_new_open_stateid, 26821da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 26833a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2684b59e3c0eSNeil Brown lock); 268537515177SNeilBrown if (status) 26861da177e4SLinus Torvalds goto out; 26873a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26881da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26891da177e4SLinus Torvalds fp = open_stp->st_file; 26901da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26911da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26921da177e4SLinus Torvalds &lock->v.new.owner); 26933e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26943e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26953e9e3dbeSNeilBrown * create new stateids)? */ 26961da177e4SLinus Torvalds status = nfserr_resource; 2697b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2698b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2699b59e3c0eSNeil Brown if (lock_sop == NULL) 27001da177e4SLinus Torvalds goto out; 2701b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 27028a280510SJ. Bruce Fields if (lock_stp == NULL) 27031da177e4SLinus Torvalds goto out; 27041da177e4SLinus Torvalds } else { 27051da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 27061da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 27071da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27081da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27091da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27103a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27111da177e4SLinus Torvalds if (status) 27121da177e4SLinus Torvalds goto out; 27133a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27141da177e4SLinus Torvalds } 27153a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27161da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27171da177e4SLinus Torvalds 27180dd395dcSNeilBrown status = nfserr_grace; 27190dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27200dd395dcSNeilBrown goto out; 27210dd395dcSNeilBrown status = nfserr_no_grace; 27220dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27230dd395dcSNeilBrown goto out; 27240dd395dcSNeilBrown 27251da177e4SLinus Torvalds locks_init_lock(&file_lock); 27261da177e4SLinus Torvalds switch (lock->lk_type) { 27271da177e4SLinus Torvalds case NFS4_READ_LT: 27281da177e4SLinus Torvalds case NFS4_READW_LT: 27291da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 27301da177e4SLinus Torvalds break; 27311da177e4SLinus Torvalds case NFS4_WRITE_LT: 27321da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27331da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 27341da177e4SLinus Torvalds break; 27351da177e4SLinus Torvalds default: 27361da177e4SLinus Torvalds status = nfserr_inval; 27371da177e4SLinus Torvalds goto out; 27381da177e4SLinus Torvalds } 2739b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27401da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27411da177e4SLinus Torvalds file_lock.fl_file = filp; 27421da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2743d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27441da177e4SLinus Torvalds 27451da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27461da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27471da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27481da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27491da177e4SLinus Torvalds else 27501da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27511da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27521da177e4SLinus Torvalds 27531da177e4SLinus Torvalds /* 27541da177e4SLinus Torvalds * Try to lock the file in the VFS. 27551da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27561da177e4SLinus Torvalds */ 27571da177e4SLinus Torvalds 2758eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2759eb76b3fdSAndy Adamson * locks_copy_lock: */ 2760eb76b3fdSAndy Adamson conflock.fl_ops = NULL; 2761eb76b3fdSAndy Adamson conflock.fl_lmops = NULL; 2762b8dd7b9aSAl Viro err = posix_lock_file_conf(filp, &file_lock, &conflock); 2763eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); 2764b8dd7b9aSAl Viro switch (-err) { 27651da177e4SLinus Torvalds case 0: /* success! */ 27661da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27671da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27681da177e4SLinus Torvalds sizeof(stateid_t)); 2769b8dd7b9aSAl Viro status = 0; 2770eb76b3fdSAndy Adamson break; 2771eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2772eb76b3fdSAndy Adamson status = nfserr_denied; 2773eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2774eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2775eb76b3fdSAndy Adamson break; 27761da177e4SLinus Torvalds case (EDEADLK): 27771da177e4SLinus Torvalds status = nfserr_deadlock; 2778eb76b3fdSAndy Adamson break; 27791da177e4SLinus Torvalds default: 2780b8dd7b9aSAl Viro dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",err); 2781eb76b3fdSAndy Adamson status = nfserr_resource; 2782eb76b3fdSAndy Adamson break; 27831da177e4SLinus Torvalds } 27841da177e4SLinus Torvalds out: 27858a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27868a280510SJ. Bruce Fields release_stateowner(lock_sop); 27873a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27883a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 27893a65588aSJ. Bruce Fields *replay_owner = lock->lk_replay_owner; 2790f2327d9aSNeil Brown } 27911da177e4SLinus Torvalds nfs4_unlock_state(); 27921da177e4SLinus Torvalds return status; 27931da177e4SLinus Torvalds } 27941da177e4SLinus Torvalds 27951da177e4SLinus Torvalds /* 27961da177e4SLinus Torvalds * LOCKT operation 27971da177e4SLinus Torvalds */ 2798b37ad28bSAl Viro __be32 27991da177e4SLinus Torvalds nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 28001da177e4SLinus Torvalds { 28011da177e4SLinus Torvalds struct inode *inode; 28021da177e4SLinus Torvalds struct file file; 28031da177e4SLinus Torvalds struct file_lock file_lock; 28048dc7c311SAndy Adamson struct file_lock conflock; 2805b37ad28bSAl Viro __be32 status; 28061da177e4SLinus Torvalds 28071da177e4SLinus Torvalds if (nfs4_in_grace()) 28081da177e4SLinus Torvalds return nfserr_grace; 28091da177e4SLinus Torvalds 28101da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28111da177e4SLinus Torvalds return nfserr_inval; 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28141da177e4SLinus Torvalds nfs4_lock_state(); 28151da177e4SLinus Torvalds 28161da177e4SLinus Torvalds status = nfserr_stale_clientid; 2817849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28181da177e4SLinus Torvalds goto out; 28191da177e4SLinus Torvalds 28201da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 2821849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28221da177e4SLinus Torvalds if (status == nfserr_symlink) 28231da177e4SLinus Torvalds status = nfserr_inval; 28241da177e4SLinus Torvalds goto out; 28251da177e4SLinus Torvalds } 28261da177e4SLinus Torvalds 28271da177e4SLinus Torvalds inode = current_fh->fh_dentry->d_inode; 28281da177e4SLinus Torvalds locks_init_lock(&file_lock); 28291da177e4SLinus Torvalds switch (lockt->lt_type) { 28301da177e4SLinus Torvalds case NFS4_READ_LT: 28311da177e4SLinus Torvalds case NFS4_READW_LT: 28321da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28331da177e4SLinus Torvalds break; 28341da177e4SLinus Torvalds case NFS4_WRITE_LT: 28351da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28361da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28371da177e4SLinus Torvalds break; 28381da177e4SLinus Torvalds default: 28391da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28401da177e4SLinus Torvalds status = nfserr_inval; 28411da177e4SLinus Torvalds goto out; 28421da177e4SLinus Torvalds } 28431da177e4SLinus Torvalds 28441da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28451da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28461da177e4SLinus Torvalds if (lockt->lt_stateowner) 28471da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28481da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28491da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2850d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28511da177e4SLinus Torvalds 28521da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28531da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28541da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28551da177e4SLinus Torvalds else 28561da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28571da177e4SLinus Torvalds 28581da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds /* posix_test_lock uses the struct file _only_ to resolve the inode. 28611da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 28621da177e4SLinus Torvalds * file may not exist, pass posix_test_lock a struct file with 28631da177e4SLinus Torvalds * only the dentry:inode set. 28641da177e4SLinus Torvalds */ 28651da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 28661da177e4SLinus Torvalds file.f_dentry = current_fh->fh_dentry; 28671da177e4SLinus Torvalds 28681da177e4SLinus Torvalds status = nfs_ok; 28698dc7c311SAndy Adamson if (posix_test_lock(&file, &file_lock, &conflock)) { 28701da177e4SLinus Torvalds status = nfserr_denied; 28718dc7c311SAndy Adamson nfs4_set_lock_denied(&conflock, &lockt->lt_denied); 28721da177e4SLinus Torvalds } 28731da177e4SLinus Torvalds out: 28741da177e4SLinus Torvalds nfs4_unlock_state(); 28751da177e4SLinus Torvalds return status; 28761da177e4SLinus Torvalds } 28771da177e4SLinus Torvalds 2878b37ad28bSAl Viro __be32 2879f2327d9aSNeil Brown nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) 28801da177e4SLinus Torvalds { 28811da177e4SLinus Torvalds struct nfs4_stateid *stp; 28821da177e4SLinus Torvalds struct file *filp = NULL; 28831da177e4SLinus Torvalds struct file_lock file_lock; 2884b37ad28bSAl Viro __be32 status; 2885b8dd7b9aSAl Viro int err; 28861da177e4SLinus Torvalds 28871da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28881da177e4SLinus Torvalds (long long) locku->lu_offset, 28891da177e4SLinus Torvalds (long long) locku->lu_length); 28901da177e4SLinus Torvalds 28911da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28921da177e4SLinus Torvalds return nfserr_inval; 28931da177e4SLinus Torvalds 28941da177e4SLinus Torvalds nfs4_lock_state(); 28951da177e4SLinus Torvalds 28961da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, 28971da177e4SLinus Torvalds locku->lu_seqid, 28981da177e4SLinus Torvalds &locku->lu_stateid, 28991da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 29001da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29011da177e4SLinus Torvalds goto out; 29021da177e4SLinus Torvalds 29031da177e4SLinus Torvalds filp = stp->st_vfs_file; 29041da177e4SLinus Torvalds BUG_ON(!filp); 29051da177e4SLinus Torvalds locks_init_lock(&file_lock); 29061da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29071da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29081da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29091da177e4SLinus Torvalds file_lock.fl_file = filp; 29101da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2911d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29121da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29131da177e4SLinus Torvalds 29141da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29151da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29161da177e4SLinus Torvalds else 29171da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29181da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29191da177e4SLinus Torvalds 29201da177e4SLinus Torvalds /* 29211da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29221da177e4SLinus Torvalds */ 2923b8dd7b9aSAl Viro err = posix_lock_file(filp, &file_lock); 2924b8dd7b9aSAl Viro if (err) { 2925849823c5SNeil Brown dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 29261da177e4SLinus Torvalds goto out_nfserr; 29271da177e4SLinus Torvalds } 29281da177e4SLinus Torvalds /* 29291da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29301da177e4SLinus Torvalds */ 29311da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29321da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29331da177e4SLinus Torvalds 29341da177e4SLinus Torvalds out: 2935f2327d9aSNeil Brown if (locku->lu_stateowner) { 29361da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2937f2327d9aSNeil Brown *replay_owner = locku->lu_stateowner; 2938f2327d9aSNeil Brown } 29391da177e4SLinus Torvalds nfs4_unlock_state(); 29401da177e4SLinus Torvalds return status; 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds out_nfserr: 2943b8dd7b9aSAl Viro status = nfserrno(err); 29441da177e4SLinus Torvalds goto out; 29451da177e4SLinus Torvalds } 29461da177e4SLinus Torvalds 29471da177e4SLinus Torvalds /* 29481da177e4SLinus Torvalds * returns 29491da177e4SLinus Torvalds * 1: locks held by lockowner 29501da177e4SLinus Torvalds * 0: no locks held by lockowner 29511da177e4SLinus Torvalds */ 29521da177e4SLinus Torvalds static int 29531da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29541da177e4SLinus Torvalds { 29551da177e4SLinus Torvalds struct file_lock **flpp; 29561da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 29571da177e4SLinus Torvalds int status = 0; 29581da177e4SLinus Torvalds 29591da177e4SLinus Torvalds lock_kernel(); 29601da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2961796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29621da177e4SLinus Torvalds status = 1; 29631da177e4SLinus Torvalds goto out; 29641da177e4SLinus Torvalds } 2965796dadfdSJ. Bruce Fields } 29661da177e4SLinus Torvalds out: 29671da177e4SLinus Torvalds unlock_kernel(); 29681da177e4SLinus Torvalds return status; 29691da177e4SLinus Torvalds } 29701da177e4SLinus Torvalds 2971b37ad28bSAl Viro __be32 29721da177e4SLinus Torvalds nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 29731da177e4SLinus Torvalds { 29741da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29753e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29763e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29771da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29783e9e3dbeSNeilBrown struct list_head matches; 29793e9e3dbeSNeilBrown int i; 2980b37ad28bSAl Viro __be32 status; 29811da177e4SLinus Torvalds 29821da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29831da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29841da177e4SLinus Torvalds 29851da177e4SLinus Torvalds /* XXX check for lease expiration */ 29861da177e4SLinus Torvalds 29871da177e4SLinus Torvalds status = nfserr_stale_clientid; 2988849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29891da177e4SLinus Torvalds return status; 29901da177e4SLinus Torvalds 29911da177e4SLinus Torvalds nfs4_lock_state(); 29921da177e4SLinus Torvalds 29931da177e4SLinus Torvalds status = nfserr_locks_held; 29943e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29953e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29963e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29973e9e3dbeSNeilBrown * data structures. */ 29983e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29993e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30003e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 30013e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 30023e9e3dbeSNeilBrown continue; 30033e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3004ea1da636SNeilBrown st_perstateowner) { 30053e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30061da177e4SLinus Torvalds goto out; 30073e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30083e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30093e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30101da177e4SLinus Torvalds } 30113e9e3dbeSNeilBrown } 30123e9e3dbeSNeilBrown } 30133e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30143e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30153e9e3dbeSNeilBrown * have been checked. */ 30161da177e4SLinus Torvalds status = nfs_ok; 30170fa822e4SNeilBrown while (!list_empty(&matches)) { 30180fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30190fa822e4SNeilBrown so_perclient); 30200fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30210fa822e4SNeilBrown * for openowners. */ 30220fa822e4SNeilBrown list_del(&sop->so_perclient); 30233e9e3dbeSNeilBrown release_stateowner(sop); 30241da177e4SLinus Torvalds } 30251da177e4SLinus Torvalds out: 30261da177e4SLinus Torvalds nfs4_unlock_state(); 30271da177e4SLinus Torvalds return status; 30281da177e4SLinus Torvalds } 30291da177e4SLinus Torvalds 30301da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3031a55370a3SNeilBrown alloc_reclaim(void) 30321da177e4SLinus Torvalds { 3033a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30341da177e4SLinus Torvalds } 30351da177e4SLinus Torvalds 3036c7b9a459SNeilBrown int 3037c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3038c7b9a459SNeilBrown { 3039c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3040c7b9a459SNeilBrown struct nfs4_client *clp; 3041c7b9a459SNeilBrown 3042c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3043c7b9a459SNeilBrown return clp ? 1 : 0; 3044c7b9a459SNeilBrown } 3045c7b9a459SNeilBrown 30461da177e4SLinus Torvalds /* 30471da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30481da177e4SLinus Torvalds */ 3049190e4fbfSNeilBrown int 3050190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30511da177e4SLinus Torvalds { 30521da177e4SLinus Torvalds unsigned int strhashval; 30531da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30541da177e4SLinus Torvalds 3055a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3056a55370a3SNeilBrown crp = alloc_reclaim(); 30571da177e4SLinus Torvalds if (!crp) 30581da177e4SLinus Torvalds return 0; 3059a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30601da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30611da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3062a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30631da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30641da177e4SLinus Torvalds return 1; 30651da177e4SLinus Torvalds } 30661da177e4SLinus Torvalds 30671da177e4SLinus Torvalds static void 30681da177e4SLinus Torvalds nfs4_release_reclaim(void) 30691da177e4SLinus Torvalds { 30701da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30711da177e4SLinus Torvalds int i; 30721da177e4SLinus Torvalds 30731da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30741da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30751da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30761da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30771da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30781da177e4SLinus Torvalds kfree(crp); 30791da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30801da177e4SLinus Torvalds } 30811da177e4SLinus Torvalds } 30821da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30831da177e4SLinus Torvalds } 30841da177e4SLinus Torvalds 30851da177e4SLinus Torvalds /* 30861da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3087fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30881da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30891da177e4SLinus Torvalds { 30901da177e4SLinus Torvalds unsigned int strhashval; 30911da177e4SLinus Torvalds struct nfs4_client *clp; 30921da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30931da177e4SLinus Torvalds 30941da177e4SLinus Torvalds 30951da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30961da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30971da177e4SLinus Torvalds if (clp == NULL) 30981da177e4SLinus Torvalds return NULL; 30991da177e4SLinus Torvalds 3100a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3101a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3102a55370a3SNeilBrown clp->cl_recdir); 31031da177e4SLinus Torvalds 31041da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3105a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31061da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3107a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31081da177e4SLinus Torvalds return crp; 31091da177e4SLinus Torvalds } 31101da177e4SLinus Torvalds } 31111da177e4SLinus Torvalds return NULL; 31121da177e4SLinus Torvalds } 31131da177e4SLinus Torvalds 31141da177e4SLinus Torvalds /* 31151da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31161da177e4SLinus Torvalds */ 3117b37ad28bSAl Viro __be32 31181da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31191da177e4SLinus Torvalds { 3120dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31211da177e4SLinus Torvalds } 31221da177e4SLinus Torvalds 3123ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31241da177e4SLinus Torvalds 3125ac4d8ff2SNeilBrown void 3126ac4d8ff2SNeilBrown nfs4_state_init(void) 31271da177e4SLinus Torvalds { 31281da177e4SLinus Torvalds int i; 31291da177e4SLinus Torvalds 31301da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31311da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31321da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31331da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31341da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31401da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31411da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31421da177e4SLinus Torvalds } 31431da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31441da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31451da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31481da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31491da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31521da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31531da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31541da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3155ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3156ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3157ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3158ac4d8ff2SNeilBrown } 3159ac4d8ff2SNeilBrown 3160190e4fbfSNeilBrown static void 3161190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3162190e4fbfSNeilBrown { 3163190e4fbfSNeilBrown int status; 3164190e4fbfSNeilBrown 31650964a3d3SNeilBrown nfs4_lock_state(); 31660964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3167190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31680964a3d3SNeilBrown nfs4_unlock_state(); 3169190e4fbfSNeilBrown if (status) 3170190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3171190e4fbfSNeilBrown } 3172190e4fbfSNeilBrown 3173ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3174ac4d8ff2SNeilBrown 3175ac4d8ff2SNeilBrown static void 3176ac4d8ff2SNeilBrown __nfs4_state_start(void) 3177ac4d8ff2SNeilBrown { 3178ac4d8ff2SNeilBrown time_t grace_time; 3179ac4d8ff2SNeilBrown 31801da177e4SLinus Torvalds boot_time = get_seconds(); 3181d99a05adSNeilBrown grace_time = max(user_lease_time, lease_time); 3182d99a05adSNeilBrown lease_time = user_lease_time; 3183a76b4319SNeilBrown in_grace = 1; 31841da177e4SLinus Torvalds printk("NFSD: starting %ld-second grace period\n", grace_time); 318558da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 3186a76b4319SNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); 31871da177e4SLinus Torvalds } 31881da177e4SLinus Torvalds 31891da177e4SLinus Torvalds int 319076a3550eSNeilBrown nfs4_state_start(void) 31911da177e4SLinus Torvalds { 31921da177e4SLinus Torvalds int status; 31931da177e4SLinus Torvalds 31941da177e4SLinus Torvalds if (nfs4_init) 31951da177e4SLinus Torvalds return 0; 31961da177e4SLinus Torvalds status = nfsd4_init_slabs(); 31971da177e4SLinus Torvalds if (status) 31981da177e4SLinus Torvalds return status; 3199190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 320076a3550eSNeilBrown __nfs4_state_start(); 32011da177e4SLinus Torvalds nfs4_init = 1; 32021da177e4SLinus Torvalds return 0; 32031da177e4SLinus Torvalds } 32041da177e4SLinus Torvalds 32051da177e4SLinus Torvalds int 32061da177e4SLinus Torvalds nfs4_in_grace(void) 32071da177e4SLinus Torvalds { 3208a76b4319SNeilBrown return in_grace; 32091da177e4SLinus Torvalds } 32101da177e4SLinus Torvalds 32111da177e4SLinus Torvalds time_t 32121da177e4SLinus Torvalds nfs4_lease_time(void) 32131da177e4SLinus Torvalds { 32141da177e4SLinus Torvalds return lease_time; 32151da177e4SLinus Torvalds } 32161da177e4SLinus Torvalds 32171da177e4SLinus Torvalds static void 32181da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32191da177e4SLinus Torvalds { 32201da177e4SLinus Torvalds int i; 32211da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32221da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32231da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32241da177e4SLinus Torvalds 32251da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32261da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32271da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32281da177e4SLinus Torvalds expire_client(clp); 32291da177e4SLinus Torvalds } 32301da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32311da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32321da177e4SLinus Torvalds expire_client(clp); 32331da177e4SLinus Torvalds } 32341da177e4SLinus Torvalds } 32351da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32361da177e4SLinus Torvalds spin_lock(&recall_lock); 32371da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32381da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32391da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32401da177e4SLinus Torvalds } 32411da177e4SLinus Torvalds spin_unlock(&recall_lock); 32421da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32431da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32441da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32451da177e4SLinus Torvalds unhash_delegation(dp); 32461da177e4SLinus Torvalds } 32471da177e4SLinus Torvalds 32481da177e4SLinus Torvalds cancel_delayed_work(&laundromat_work); 3249190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32501da177e4SLinus Torvalds nfs4_init = 0; 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds void 32541da177e4SLinus Torvalds nfs4_state_shutdown(void) 32551da177e4SLinus Torvalds { 32565e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 32575e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 32581da177e4SLinus Torvalds nfs4_lock_state(); 32591da177e4SLinus Torvalds nfs4_release_reclaim(); 32601da177e4SLinus Torvalds __nfs4_state_shutdown(); 32611da177e4SLinus Torvalds nfsd4_free_slabs(); 32621da177e4SLinus Torvalds nfs4_unlock_state(); 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32650964a3d3SNeilBrown static void 32660964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32670964a3d3SNeilBrown { 32680964a3d3SNeilBrown nfs4_lock_state(); 32690964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32700964a3d3SNeilBrown nfs4_unlock_state(); 32710964a3d3SNeilBrown } 32720964a3d3SNeilBrown 32730964a3d3SNeilBrown /* 32740964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32750964a3d3SNeilBrown */ 32760964a3d3SNeilBrown int 32770964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32780964a3d3SNeilBrown { 32790964a3d3SNeilBrown int status; 32800964a3d3SNeilBrown struct nameidata nd; 32810964a3d3SNeilBrown 32820964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 32830964a3d3SNeilBrown if (status) 32840964a3d3SNeilBrown return status; 32850964a3d3SNeilBrown status = -ENOTDIR; 32860964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 32870964a3d3SNeilBrown nfs4_set_recdir(recdir); 32880964a3d3SNeilBrown status = 0; 32890964a3d3SNeilBrown } 32900964a3d3SNeilBrown path_release(&nd); 32910964a3d3SNeilBrown return status; 32920964a3d3SNeilBrown } 32930964a3d3SNeilBrown 32941da177e4SLinus Torvalds /* 32951da177e4SLinus Torvalds * Called when leasetime is changed. 32961da177e4SLinus Torvalds * 3297d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3298d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3299d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3300d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3301d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33021da177e4SLinus Torvalds */ 33031da177e4SLinus Torvalds void 33041da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33051da177e4SLinus Torvalds { 3306d99a05adSNeilBrown lock_kernel(); 3307d99a05adSNeilBrown user_lease_time = leasetime; 3308d99a05adSNeilBrown unlock_kernel(); 33091da177e4SLinus Torvalds } 3310