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 */ 126fd39ca9aSNeilBrown static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; 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 1501da177e4SLinus Torvalds static struct nfs4_delegation * 1511da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1521da177e4SLinus Torvalds { 1531da177e4SLinus Torvalds struct nfs4_delegation *dp; 1541da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1551da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1561da177e4SLinus Torvalds 1571da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 1585b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1595b2d21c1SNeilBrown if (dp == NULL) 1601da177e4SLinus Torvalds return dp; 161ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 162ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1631da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1641da177e4SLinus Torvalds dp->dl_client = clp; 16513cd2184SNeilBrown get_nfs4_file(fp); 1661da177e4SLinus Torvalds dp->dl_file = fp; 1671da177e4SLinus Torvalds dp->dl_flock = NULL; 1681da177e4SLinus Torvalds get_file(stp->st_vfs_file); 1691da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 1701da177e4SLinus Torvalds dp->dl_type = type; 1711da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 1721da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 1731da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 1741da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 1751da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 1761da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 1771da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 1781da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 1791da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 1801da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 1811da177e4SLinus Torvalds dp->dl_time = 0; 1821da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 183ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 184ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 1851da177e4SLinus Torvalds return dp; 1861da177e4SLinus Torvalds } 1871da177e4SLinus Torvalds 1881da177e4SLinus Torvalds void 1891da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 1901da177e4SLinus Torvalds { 1911da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 1921da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 19313cd2184SNeilBrown put_nfs4_file(dp->dl_file); 1945b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds } 1971da177e4SLinus Torvalds 1981da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 1991da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2001da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2011da177e4SLinus Torvalds * fl_release_callback. 2021da177e4SLinus Torvalds */ 2031da177e4SLinus Torvalds static void 2041da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2051da177e4SLinus Torvalds { 2061da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2071da177e4SLinus Torvalds 2081da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2091da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2101da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2111da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 212c907132dSNeilBrown if (dp->dl_flock) 2131da177e4SLinus Torvalds setlease(filp, F_UNLCK, &dp->dl_flock); 2141da177e4SLinus Torvalds nfsd_close(filp); 2151da177e4SLinus Torvalds } 2161da177e4SLinus Torvalds 2171da177e4SLinus Torvalds /* Called under the state lock. */ 2181da177e4SLinus Torvalds static void 2191da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2201da177e4SLinus Torvalds { 221ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 222ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2231da177e4SLinus Torvalds spin_lock(&recall_lock); 2241da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2251da177e4SLinus Torvalds spin_unlock(&recall_lock); 2261da177e4SLinus Torvalds nfs4_close_delegation(dp); 2271da177e4SLinus Torvalds nfs4_put_delegation(dp); 2281da177e4SLinus Torvalds } 2291da177e4SLinus Torvalds 2301da177e4SLinus Torvalds /* 2311da177e4SLinus Torvalds * SETCLIENTID state 2321da177e4SLinus Torvalds */ 2331da177e4SLinus Torvalds 2341da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2351da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2361da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2371da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2381da177e4SLinus Torvalds 2391da177e4SLinus Torvalds #define clientid_hashval(id) \ 2401da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 241a55370a3SNeilBrown #define clientstr_hashval(name) \ 242a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2431da177e4SLinus Torvalds /* 2441da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2451da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2461da177e4SLinus Torvalds * 2471da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2481da177e4SLinus Torvalds * setclientid_confirmed info. 2491da177e4SLinus Torvalds * 2501da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2511da177e4SLinus Torvalds * setclientid info. 2521da177e4SLinus Torvalds * 2531da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2541da177e4SLinus Torvalds * for lease renewal. 2551da177e4SLinus Torvalds * 2561da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2571da177e4SLinus Torvalds * for last close replay. 2581da177e4SLinus Torvalds */ 2591da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2601da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2611da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2621da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2631da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2641da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2651da177e4SLinus Torvalds static struct list_head client_lru; 2661da177e4SLinus Torvalds static struct list_head close_lru; 2671da177e4SLinus Torvalds 2681da177e4SLinus Torvalds static inline void 2691da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 2701da177e4SLinus Torvalds { 2711da177e4SLinus Torvalds /* 2721da177e4SLinus Torvalds * Move client to the end to the LRU list. 2731da177e4SLinus Torvalds */ 2741da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 2751da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 2761da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2771da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 2781da177e4SLinus Torvalds clp->cl_time = get_seconds(); 2791da177e4SLinus Torvalds } 2801da177e4SLinus Torvalds 2811da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 2821da177e4SLinus Torvalds static int 2831da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 2841da177e4SLinus Torvalds { 2851da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 2861da177e4SLinus Torvalds return 0; 2871da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 2881da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 2891da177e4SLinus Torvalds return 1; 2901da177e4SLinus Torvalds } 2911da177e4SLinus Torvalds 2921da177e4SLinus Torvalds /* 2931da177e4SLinus Torvalds * XXX Should we use a slab cache ? 2941da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 2951da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 2961da177e4SLinus Torvalds */ 2971da177e4SLinus Torvalds static inline struct nfs4_client * 2981da177e4SLinus Torvalds alloc_client(struct xdr_netobj name) 2991da177e4SLinus Torvalds { 3001da177e4SLinus Torvalds struct nfs4_client *clp; 3011da177e4SLinus Torvalds 3021da177e4SLinus Torvalds if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 3031da177e4SLinus Torvalds memset(clp, 0, sizeof(*clp)); 3041da177e4SLinus Torvalds if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 3051da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3061da177e4SLinus Torvalds clp->cl_name.len = name.len; 3071da177e4SLinus Torvalds } 3081da177e4SLinus Torvalds else { 3091da177e4SLinus Torvalds kfree(clp); 3101da177e4SLinus Torvalds clp = NULL; 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds } 3131da177e4SLinus Torvalds return clp; 3141da177e4SLinus Torvalds } 3151da177e4SLinus Torvalds 3161da177e4SLinus Torvalds static inline void 3171da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3181da177e4SLinus Torvalds { 3191da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3201da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3211da177e4SLinus Torvalds kfree(clp->cl_name.data); 3221da177e4SLinus Torvalds kfree(clp); 3231da177e4SLinus Torvalds } 3241da177e4SLinus Torvalds 3251da177e4SLinus Torvalds void 3261da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3271da177e4SLinus Torvalds { 3281da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3291da177e4SLinus Torvalds free_client(clp); 3301da177e4SLinus Torvalds } 3311da177e4SLinus Torvalds 3321da177e4SLinus Torvalds static void 3331da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3341da177e4SLinus Torvalds { 3351da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3361da177e4SLinus Torvalds struct nfs4_delegation *dp; 3371da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 3381da177e4SLinus Torvalds struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3391da177e4SLinus Torvalds struct list_head reaplist; 3401da177e4SLinus Torvalds 3411da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3421da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3431da177e4SLinus Torvalds 3441da177e4SLinus Torvalds /* shutdown rpc client, ending any outstanding recall rpcs */ 3451da177e4SLinus Torvalds if (atomic_read(&cb->cb_set) == 1 && clnt) { 3461da177e4SLinus Torvalds rpc_shutdown_client(clnt); 3471da177e4SLinus Torvalds clnt = clp->cl_callback.cb_client = NULL; 3481da177e4SLinus Torvalds } 3491da177e4SLinus Torvalds 3501da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 3511da177e4SLinus Torvalds spin_lock(&recall_lock); 352ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 353ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 3541da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 3551da177e4SLinus Torvalds dp->dl_flock); 356ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3571da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds spin_unlock(&recall_lock); 3601da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 3611da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 3621da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3631da177e4SLinus Torvalds unhash_delegation(dp); 3641da177e4SLinus Torvalds } 3651da177e4SLinus Torvalds list_del(&clp->cl_idhash); 3661da177e4SLinus Torvalds list_del(&clp->cl_strhash); 3671da177e4SLinus Torvalds list_del(&clp->cl_lru); 368ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 369ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 3701da177e4SLinus Torvalds release_stateowner(sop); 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds put_nfs4_client(clp); 3731da177e4SLinus Torvalds } 3741da177e4SLinus Torvalds 3751da177e4SLinus Torvalds static struct nfs4_client * 376a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 3771da177e4SLinus Torvalds struct nfs4_client *clp; 3781da177e4SLinus Torvalds 3791da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 3801da177e4SLinus Torvalds goto out; 381a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 3821da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 3831da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 3841da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 3851da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 386ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 387ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 3881da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 3891da177e4SLinus Torvalds out: 3901da177e4SLinus Torvalds return clp; 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds static void 3941da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 3951da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 3961da177e4SLinus Torvalds } 3971da177e4SLinus Torvalds 3981da177e4SLinus Torvalds static void 3991da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4001da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4011da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4021da177e4SLinus Torvalds } 4031da177e4SLinus Torvalds 4041da177e4SLinus Torvalds static void 4051da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4061da177e4SLinus Torvalds 4071da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4081da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4091da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4101da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds 413a55370a3SNeilBrown static inline int 414a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 415a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4161da177e4SLinus Torvalds } 4171da177e4SLinus Torvalds 4181da177e4SLinus Torvalds static int 4191da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4201da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4211da177e4SLinus Torvalds } 4221da177e4SLinus Torvalds 4231da177e4SLinus Torvalds static int 4241da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4251da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4261da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4271da177e4SLinus Torvalds } 4281da177e4SLinus Torvalds 4291da177e4SLinus Torvalds /* XXX what about NGROUP */ 4301da177e4SLinus Torvalds static int 4311da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4321da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4331da177e4SLinus Torvalds 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds static void 4371da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4381da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4391da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4401da177e4SLinus Torvalds } 4411da177e4SLinus Torvalds 4421da177e4SLinus Torvalds static void 4431da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4441da177e4SLinus Torvalds struct timespec tv; 4451da177e4SLinus Torvalds u32 * p; 4461da177e4SLinus Torvalds 4471da177e4SLinus Torvalds tv = CURRENT_TIME; 4481da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 4491da177e4SLinus Torvalds *p++ = tv.tv_sec; 4501da177e4SLinus Torvalds *p++ = tv.tv_nsec; 4511da177e4SLinus Torvalds } 4521da177e4SLinus Torvalds 4531da177e4SLinus Torvalds static int 4541da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 4551da177e4SLinus Torvalds 4561da177e4SLinus Torvalds if (name.len == 0) 4571da177e4SLinus Torvalds return 0; 4581da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 4591da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 4601da177e4SLinus Torvalds return 0; 4611da177e4SLinus Torvalds } 4621da177e4SLinus Torvalds return 1; 4631da177e4SLinus Torvalds } 4641da177e4SLinus Torvalds 465fd39ca9aSNeilBrown static void 4661da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 4671da177e4SLinus Torvalds { 4681da177e4SLinus Torvalds unsigned int idhashval; 4691da177e4SLinus Torvalds 4701da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 4711da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4721da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 4731da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 4741da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 477fd39ca9aSNeilBrown static void 4781da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 4791da177e4SLinus Torvalds { 4801da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4811da177e4SLinus Torvalds unsigned int strhashval; 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 4841da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 4851da177e4SLinus Torvalds list_del_init(&clp->cl_idhash); 4861da177e4SLinus Torvalds list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 487a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 4881da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 4891da177e4SLinus Torvalds renew_client(clp); 4901da177e4SLinus Torvalds } 4911da177e4SLinus Torvalds 4921da177e4SLinus Torvalds static struct nfs4_client * 4931da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 4941da177e4SLinus Torvalds { 4951da177e4SLinus Torvalds struct nfs4_client *clp; 4961da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 4971da177e4SLinus Torvalds 4981da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 4991da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5001da177e4SLinus Torvalds return clp; 5011da177e4SLinus Torvalds } 5021da177e4SLinus Torvalds return NULL; 5031da177e4SLinus Torvalds } 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds static struct nfs4_client * 5061da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5071da177e4SLinus Torvalds { 5081da177e4SLinus Torvalds struct nfs4_client *clp; 5091da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5101da177e4SLinus Torvalds 5111da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5121da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5131da177e4SLinus Torvalds return clp; 5141da177e4SLinus Torvalds } 5151da177e4SLinus Torvalds return NULL; 5161da177e4SLinus Torvalds } 5171da177e4SLinus Torvalds 51828ce6054SNeilBrown static struct nfs4_client * 51928ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 52028ce6054SNeilBrown { 52128ce6054SNeilBrown struct nfs4_client *clp; 52228ce6054SNeilBrown 52328ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 52428ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 52528ce6054SNeilBrown return clp; 52628ce6054SNeilBrown } 52728ce6054SNeilBrown return NULL; 52828ce6054SNeilBrown } 52928ce6054SNeilBrown 53028ce6054SNeilBrown static struct nfs4_client * 53128ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 53228ce6054SNeilBrown { 53328ce6054SNeilBrown struct nfs4_client *clp; 53428ce6054SNeilBrown 53528ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 53628ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 53728ce6054SNeilBrown return clp; 53828ce6054SNeilBrown } 53928ce6054SNeilBrown return NULL; 54028ce6054SNeilBrown } 54128ce6054SNeilBrown 5421da177e4SLinus Torvalds /* a helper function for parse_callback */ 5431da177e4SLinus Torvalds static int 5441da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5451da177e4SLinus Torvalds { 5461da177e4SLinus Torvalds unsigned int len = *lenp; 5471da177e4SLinus Torvalds char *p = *addrp; 5481da177e4SLinus Torvalds int n = -1; 5491da177e4SLinus Torvalds char c; 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds for (;;) { 5521da177e4SLinus Torvalds if (!len) 5531da177e4SLinus Torvalds break; 5541da177e4SLinus Torvalds len--; 5551da177e4SLinus Torvalds c = *p++; 5561da177e4SLinus Torvalds if (c == '.') 5571da177e4SLinus Torvalds break; 5581da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 5591da177e4SLinus Torvalds n = -1; 5601da177e4SLinus Torvalds break; 5611da177e4SLinus Torvalds } 5621da177e4SLinus Torvalds if (n < 0) 5631da177e4SLinus Torvalds n = 0; 5641da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 5651da177e4SLinus Torvalds if (n > 255) { 5661da177e4SLinus Torvalds n = -1; 5671da177e4SLinus Torvalds break; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds *lenp = len; 5711da177e4SLinus Torvalds *addrp = p; 5721da177e4SLinus Torvalds return n; 5731da177e4SLinus Torvalds } 5741da177e4SLinus Torvalds 5751da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 576fd39ca9aSNeilBrown static int 5771da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 5781da177e4SLinus Torvalds { 5791da177e4SLinus Torvalds int temp = 0; 5801da177e4SLinus Torvalds u32 cbaddr = 0; 5811da177e4SLinus Torvalds u16 cbport = 0; 5821da177e4SLinus Torvalds u32 addrlen = addr_len; 5831da177e4SLinus Torvalds char *addr = addr_val; 5841da177e4SLinus Torvalds int i, shift; 5851da177e4SLinus Torvalds 5861da177e4SLinus Torvalds /* ipaddress */ 5871da177e4SLinus Torvalds shift = 24; 5881da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 5891da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 5901da177e4SLinus Torvalds return 0; 5911da177e4SLinus Torvalds } 5921da177e4SLinus Torvalds cbaddr |= (temp << shift); 5931da177e4SLinus Torvalds if (shift > 0) 5941da177e4SLinus Torvalds shift -= 8; 5951da177e4SLinus Torvalds } 5961da177e4SLinus Torvalds *cbaddrp = cbaddr; 5971da177e4SLinus Torvalds 5981da177e4SLinus Torvalds /* port */ 5991da177e4SLinus Torvalds shift = 8; 6001da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6011da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6021da177e4SLinus Torvalds return 0; 6031da177e4SLinus Torvalds } 6041da177e4SLinus Torvalds cbport |= (temp << shift); 6051da177e4SLinus Torvalds if (shift > 0) 6061da177e4SLinus Torvalds shift -= 8; 6071da177e4SLinus Torvalds } 6081da177e4SLinus Torvalds *cbportp = cbport; 6091da177e4SLinus Torvalds return 1; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds 612fd39ca9aSNeilBrown static void 6131da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6141da177e4SLinus Torvalds { 6151da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6161da177e4SLinus Torvalds 6171da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6181da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6191da177e4SLinus Torvalds goto out_err; 6201da177e4SLinus Torvalds 6211da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6221da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6231da177e4SLinus Torvalds goto out_err; 6241da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6251da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6261da177e4SLinus Torvalds return; 6271da177e4SLinus Torvalds out_err: 628849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6291da177e4SLinus Torvalds "will not receive delegations\n", 6301da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6311da177e4SLinus Torvalds 6321da177e4SLinus Torvalds return; 6331da177e4SLinus Torvalds } 6341da177e4SLinus Torvalds 6351da177e4SLinus Torvalds /* 6361da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6371da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6381da177e4SLinus Torvalds * CASE0 - CASE4 below. 6391da177e4SLinus Torvalds * 6401da177e4SLinus Torvalds * NOTES: 6411da177e4SLinus Torvalds * callback information will be processed in a future patch 6421da177e4SLinus Torvalds * 6431da177e4SLinus Torvalds * an unconfirmed record is added when: 6441da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6451da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6461da177e4SLinus Torvalds * verifier, and clientid. 6471da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6481da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6491da177e4SLinus Torvalds * name and principal 6501da177e4SLinus Torvalds * 6511da177e4SLinus Torvalds * an unconfirmed record is replaced when: 6521da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 6531da177e4SLinus Torvalds * and an unconfirmed record is found with matching 6541da177e4SLinus Torvalds * name, principal, and with clientid and 6551da177e4SLinus Torvalds * confirm that does not match the confirmed record. 6561da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 6571da177e4SLinus Torvalds * principal. there is an unconfirmed record with 6581da177e4SLinus Torvalds * matching name, principal. 6591da177e4SLinus Torvalds * 6601da177e4SLinus Torvalds * an unconfirmed record is deleted when: 6611da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 6621da177e4SLinus Torvalds * and confirmed clientid. 6631da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 6641da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 6651da177e4SLinus Torvalds * as described above. 6661da177e4SLinus Torvalds * 6671da177e4SLinus Torvalds */ 6681da177e4SLinus Torvalds int 6691da177e4SLinus Torvalds nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 6701da177e4SLinus Torvalds { 6711da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 6721da177e4SLinus Torvalds struct xdr_netobj clname = { 6731da177e4SLinus Torvalds .len = setclid->se_namelen, 6741da177e4SLinus Torvalds .data = setclid->se_name, 6751da177e4SLinus Torvalds }; 6761da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 6771da177e4SLinus Torvalds unsigned int strhashval; 67828ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 6791da177e4SLinus Torvalds int status; 680a55370a3SNeilBrown char dname[HEXDIR_LEN]; 6811da177e4SLinus Torvalds 6821da177e4SLinus Torvalds if (!check_name(clname)) 68373aea4ecSNeil Brown return nfserr_inval; 6841da177e4SLinus Torvalds 685a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 686a55370a3SNeilBrown if (status) 68773aea4ecSNeil Brown return status; 688a55370a3SNeilBrown 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 6911da177e4SLinus Torvalds * We get here on a DRC miss. 6921da177e4SLinus Torvalds */ 6931da177e4SLinus Torvalds 694a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds nfs4_lock_state(); 69728ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 69828ce6054SNeilBrown if (conf) { 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * CASE 0: 7011da177e4SLinus Torvalds * clname match, confirmed, different principal 7021da177e4SLinus Torvalds * or different ip_address 7031da177e4SLinus Torvalds */ 7041da177e4SLinus Torvalds status = nfserr_clid_inuse; 70528ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 70628ce6054SNeilBrown || conf->cl_addr != ip_addr) { 7071da177e4SLinus Torvalds printk("NFSD: setclientid: string in use by client" 7081da177e4SLinus Torvalds "(clientid %08x/%08x)\n", 70928ce6054SNeilBrown conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); 7101da177e4SLinus Torvalds goto out; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds } 71328ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7141da177e4SLinus Torvalds status = nfserr_resource; 7151da177e4SLinus Torvalds if (!conf) { 7161da177e4SLinus Torvalds /* 7171da177e4SLinus Torvalds * CASE 4: 7181da177e4SLinus Torvalds * placed first, because it is the normal case. 7191da177e4SLinus Torvalds */ 7201da177e4SLinus Torvalds if (unconf) 7211da177e4SLinus Torvalds expire_client(unconf); 722a55370a3SNeilBrown new = create_client(clname, dname); 723a55370a3SNeilBrown if (new == NULL) 7241da177e4SLinus Torvalds goto out; 7251da177e4SLinus Torvalds copy_verf(new, &clverifier); 7261da177e4SLinus Torvalds new->cl_addr = ip_addr; 7271da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7281da177e4SLinus Torvalds gen_clid(new); 7291da177e4SLinus Torvalds gen_confirm(new); 7301da177e4SLinus Torvalds gen_callback(new, setclid); 7311da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7321da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7331da177e4SLinus Torvalds /* 7341da177e4SLinus Torvalds * CASE 1: 7351da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7361da177e4SLinus Torvalds * verifier match: probable callback update 7371da177e4SLinus Torvalds * 7381da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7391da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7401da177e4SLinus Torvalds * 7411da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7421da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7431da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7441da177e4SLinus Torvalds * new cl_confirm 7451da177e4SLinus Torvalds */ 74631f4a6c1SNeilBrown if (unconf) { 74731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 74831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 74931f4a6c1SNeilBrown * This has the advantage that there is at most 75031f4a6c1SNeilBrown * one {*x***} in either list at any time. 75131f4a6c1SNeilBrown */ 7521da177e4SLinus Torvalds expire_client(unconf); 7531da177e4SLinus Torvalds } 754a55370a3SNeilBrown new = create_client(clname, dname); 755a55370a3SNeilBrown if (new == NULL) 7561da177e4SLinus Torvalds goto out; 7571da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 7581da177e4SLinus Torvalds new->cl_addr = ip_addr; 7591da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7601da177e4SLinus Torvalds copy_clid(new, conf); 7611da177e4SLinus Torvalds gen_confirm(new); 7621da177e4SLinus Torvalds gen_callback(new, setclid); 7631da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 7641da177e4SLinus Torvalds } else if (!unconf) { 7651da177e4SLinus Torvalds /* 7661da177e4SLinus Torvalds * CASE 2: 7671da177e4SLinus Torvalds * clname match, confirmed, principal match 7681da177e4SLinus Torvalds * verfier does not match 7691da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 7701da177e4SLinus Torvalds * using input clverifier, clname, and callback info 7711da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 7721da177e4SLinus Torvalds */ 773a55370a3SNeilBrown new = create_client(clname, dname); 774a55370a3SNeilBrown if (new == NULL) 7751da177e4SLinus Torvalds goto out; 7761da177e4SLinus Torvalds copy_verf(new,&clverifier); 7771da177e4SLinus Torvalds new->cl_addr = ip_addr; 7781da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7791da177e4SLinus Torvalds gen_clid(new); 7801da177e4SLinus Torvalds gen_confirm(new); 7811da177e4SLinus Torvalds gen_callback(new, setclid); 7821da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7831da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 7841da177e4SLinus Torvalds /* 7851da177e4SLinus Torvalds * CASE3: 7861da177e4SLinus Torvalds * confirmed found (name, principal match) 7871da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 7881da177e4SLinus Torvalds * 7891da177e4SLinus Torvalds * unconfirmed found (name match) 7901da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 7911da177e4SLinus Torvalds * 7921da177e4SLinus Torvalds * remove unconfirmed. 7931da177e4SLinus Torvalds * 7941da177e4SLinus Torvalds * create an unconfirmed nfs4_client 7951da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 7961da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 7971da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 7981da177e4SLinus Torvalds */ 7991da177e4SLinus Torvalds expire_client(unconf); 800a55370a3SNeilBrown new = create_client(clname, dname); 801a55370a3SNeilBrown if (new == NULL) 8021da177e4SLinus Torvalds goto out; 8031da177e4SLinus Torvalds copy_verf(new,&clverifier); 8041da177e4SLinus Torvalds new->cl_addr = ip_addr; 8051da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8061da177e4SLinus Torvalds gen_clid(new); 8071da177e4SLinus Torvalds gen_confirm(new); 8081da177e4SLinus Torvalds gen_callback(new, setclid); 8091da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8101da177e4SLinus Torvalds } else { 8111da177e4SLinus Torvalds /* No cases hit !!! */ 8121da177e4SLinus Torvalds status = nfserr_inval; 8131da177e4SLinus Torvalds goto out; 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8171da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8181da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8191da177e4SLinus Torvalds status = nfs_ok; 8201da177e4SLinus Torvalds out: 8211da177e4SLinus Torvalds nfs4_unlock_state(); 8221da177e4SLinus Torvalds return status; 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds /* 8271da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8281da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8291da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8301da177e4SLinus Torvalds * 8311da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8321da177e4SLinus Torvalds */ 8331da177e4SLinus Torvalds int 8341da177e4SLinus Torvalds nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 8351da177e4SLinus Torvalds { 8361da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 83721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8381da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8391da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 8401da177e4SLinus Torvalds int status; 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8431da177e4SLinus Torvalds return nfserr_stale_clientid; 8441da177e4SLinus Torvalds /* 8451da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8461da177e4SLinus Torvalds * We get here on a DRC miss. 8471da177e4SLinus Torvalds */ 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds nfs4_lock_state(); 85021ab45a4SNeilBrown 85121ab45a4SNeilBrown conf = find_confirmed_client(clid); 85221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 85321ab45a4SNeilBrown 85422de4d83SNeilBrown status = nfserr_clid_inuse; 85521ab45a4SNeilBrown if (conf && conf->cl_addr != ip_addr) 8561da177e4SLinus Torvalds goto out; 85721ab45a4SNeilBrown if (unconf && unconf->cl_addr != ip_addr) 8581da177e4SLinus Torvalds goto out; 85921ab45a4SNeilBrown 8601da177e4SLinus Torvalds if ((conf && unconf) && 8611da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 8621da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 863a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 8641da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 8657c79f737SNeilBrown /* CASE 1: 8667c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 8677c79f737SNeilBrown * conf record that matches input clientid. 8687c79f737SNeilBrown * conf and unconf records match names, verifiers 8697c79f737SNeilBrown */ 8701da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 8711da177e4SLinus Torvalds status = nfserr_clid_inuse; 8721da177e4SLinus Torvalds else { 8731a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 8741a69c179SNeilBrown * change request correctly. */ 875cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 87621ab45a4SNeilBrown gen_confirm(conf); 87746309029SNeilBrown nfsd4_remove_clid_dir(unconf); 8781a69c179SNeilBrown expire_client(unconf); 8791da177e4SLinus Torvalds status = nfs_ok; 8801a69c179SNeilBrown 8811da177e4SLinus Torvalds } 8827c79f737SNeilBrown } else if ((conf && !unconf) || 8831da177e4SLinus Torvalds ((conf && unconf) && 8841da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 885a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 8867c79f737SNeilBrown /* CASE 2: 8877c79f737SNeilBrown * conf record that matches input clientid. 8887c79f737SNeilBrown * if unconf record matches input clientid, then 8897c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 8907c79f737SNeilBrown * conf record. 8917c79f737SNeilBrown */ 89221ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 8931da177e4SLinus Torvalds status = nfserr_clid_inuse; 89421ab45a4SNeilBrown else 8951da177e4SLinus Torvalds status = nfs_ok; 8967c79f737SNeilBrown } else if (!conf && unconf 8977c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 8981da177e4SLinus Torvalds /* CASE 3: 8991da177e4SLinus Torvalds * conf record not found. 9001da177e4SLinus Torvalds * unconf record found. 9011da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9021da177e4SLinus Torvalds */ 9031da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9041da177e4SLinus Torvalds status = nfserr_clid_inuse; 9051da177e4SLinus Torvalds } else { 9061a69c179SNeilBrown unsigned int hash = 9071a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9081a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9091a69c179SNeilBrown hash); 9101a69c179SNeilBrown if (conf) { 911c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9121a69c179SNeilBrown expire_client(conf); 9131a69c179SNeilBrown } 9141da177e4SLinus Torvalds move_to_confirmed(unconf); 91521ab45a4SNeilBrown conf = unconf; 9161a69c179SNeilBrown status = nfs_ok; 9171da177e4SLinus Torvalds } 9187c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9197c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9207c79f737SNeilBrown &confirm)))) { 9211da177e4SLinus Torvalds /* CASE 4: 9227c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9231da177e4SLinus Torvalds * match input confirm. 9247c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9251da177e4SLinus Torvalds * does not match input confirm. 9261da177e4SLinus Torvalds */ 9271da177e4SLinus Torvalds status = nfserr_stale_clientid; 9287c79f737SNeilBrown } else { 9291da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 93022de4d83SNeilBrown status = nfserr_clid_inuse; 93108e8987cSNeilBrown } 9321da177e4SLinus Torvalds out: 9331da177e4SLinus Torvalds if (!status) 93421ab45a4SNeilBrown nfsd4_probe_callback(conf); 9351da177e4SLinus Torvalds nfs4_unlock_state(); 9361da177e4SLinus Torvalds return status; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds /* 9401da177e4SLinus Torvalds * Open owner state (share locks) 9411da177e4SLinus Torvalds */ 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds /* hash tables for nfs4_stateowner */ 9441da177e4SLinus Torvalds #define OWNER_HASH_BITS 8 9451da177e4SLinus Torvalds #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 9461da177e4SLinus Torvalds #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds #define ownerid_hashval(id) \ 9491da177e4SLinus Torvalds ((id) & OWNER_HASH_MASK) 9501da177e4SLinus Torvalds #define ownerstr_hashval(clientid, ownername) \ 9511da177e4SLinus Torvalds (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 9541da177e4SLinus Torvalds static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds /* hash table for nfs4_file */ 9571da177e4SLinus Torvalds #define FILE_HASH_BITS 8 9581da177e4SLinus Torvalds #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 9591da177e4SLinus Torvalds #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 9601da177e4SLinus Torvalds /* hash table for (open)nfs4_stateid */ 9611da177e4SLinus Torvalds #define STATEID_HASH_BITS 10 9621da177e4SLinus Torvalds #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 9631da177e4SLinus Torvalds #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds #define file_hashval(x) \ 9661da177e4SLinus Torvalds hash_ptr(x, FILE_HASH_BITS) 9671da177e4SLinus Torvalds #define stateid_hashval(owner_id, file_id) \ 9681da177e4SLinus Torvalds (((owner_id) + (file_id)) & STATEID_HASH_MASK) 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static struct list_head file_hashtbl[FILE_HASH_SIZE]; 9711da177e4SLinus Torvalds static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9741da177e4SLinus Torvalds static inline struct nfs4_file * 9751da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9761da177e4SLinus Torvalds { 9771da177e4SLinus Torvalds struct nfs4_file *fp; 9781da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9791da177e4SLinus Torvalds 980e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 981e60d4398SNeilBrown if (fp) { 98213cd2184SNeilBrown kref_init(&fp->fi_ref); 9831da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9848beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9861da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9871da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9881da177e4SLinus Torvalds fp->fi_id = current_fileid++; 9891da177e4SLinus Torvalds return fp; 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds return NULL; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds static void 995e60d4398SNeilBrown nfsd4_free_slab(kmem_cache_t **slab) 996e60d4398SNeilBrown { 997e60d4398SNeilBrown int status; 998e60d4398SNeilBrown 999e60d4398SNeilBrown if (*slab == NULL) 1000e60d4398SNeilBrown return; 1001e60d4398SNeilBrown status = kmem_cache_destroy(*slab); 1002e60d4398SNeilBrown *slab = NULL; 1003e60d4398SNeilBrown WARN_ON(status); 1004e60d4398SNeilBrown } 1005e60d4398SNeilBrown 1006e60d4398SNeilBrown static void 1007e60d4398SNeilBrown nfsd4_free_slabs(void) 1008e60d4398SNeilBrown { 1009e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1010e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10115ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10125b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1013e60d4398SNeilBrown } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static int 10161da177e4SLinus Torvalds nfsd4_init_slabs(void) 10171da177e4SLinus Torvalds { 10181da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 10191da177e4SLinus Torvalds sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1020e60d4398SNeilBrown if (stateowner_slab == NULL) 1021e60d4398SNeilBrown goto out_nomem; 1022e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 1023e60d4398SNeilBrown sizeof(struct nfs4_file), 0, 0, NULL, NULL); 1024e60d4398SNeilBrown if (file_slab == NULL) 1025e60d4398SNeilBrown goto out_nomem; 10265ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 10275ac049acSNeilBrown sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); 10285ac049acSNeilBrown if (stateid_slab == NULL) 10295ac049acSNeilBrown goto out_nomem; 10305b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 10315b2d21c1SNeilBrown sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); 10325b2d21c1SNeilBrown if (deleg_slab == NULL) 10335b2d21c1SNeilBrown goto out_nomem; 1034e60d4398SNeilBrown return 0; 1035e60d4398SNeilBrown out_nomem: 1036e60d4398SNeilBrown nfsd4_free_slabs(); 10371da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10381da177e4SLinus Torvalds return -ENOMEM; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds void 10421da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10431da177e4SLinus Torvalds { 10441da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10451da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10461da177e4SLinus Torvalds kfree(sop->so_owner.data); 10471da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10511da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10561da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10571da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10581da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10591da177e4SLinus Torvalds kref_init(&sop->so_ref); 10601da177e4SLinus Torvalds return sop; 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds return NULL; 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds static struct nfs4_stateowner * 10681da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10701da177e4SLinus Torvalds struct nfs4_replay *rp; 10711da177e4SLinus Torvalds unsigned int idhashval; 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10741da177e4SLinus Torvalds return NULL; 10751da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10761da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10771da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10781da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1079ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1080ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10811da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10821da177e4SLinus Torvalds sop->so_time = 0; 10831da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10841da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1085ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10861da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10871da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10881da177e4SLinus Torvalds sop->so_client = clp; 10891da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10901da177e4SLinus Torvalds sop->so_confirmed = 0; 10911da177e4SLinus Torvalds rp = &sop->so_replay; 1092de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 10931da177e4SLinus Torvalds rp->rp_buflen = 0; 10941da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 10951da177e4SLinus Torvalds return sop; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static void 10991da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11001da177e4SLinus Torvalds { 11011da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11021da177e4SLinus Torvalds 1103ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1104ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1105ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1106ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11071da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11081da177e4SLinus Torvalds release_stateowner(lock_sop); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds static void 11131da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11141da177e4SLinus Torvalds { 11151da177e4SLinus Torvalds struct nfs4_stateid *stp; 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds list_del(&sop->so_idhash); 11181da177e4SLinus Torvalds list_del(&sop->so_strhash); 11196fa305deSNeilBrown if (sop->so_is_open_owner) 11201da177e4SLinus Torvalds list_del(&sop->so_perclient); 1121ea1da636SNeilBrown list_del(&sop->so_perstateid); 1122ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1123ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1124ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11251da177e4SLinus Torvalds if (sop->so_is_open_owner) 11261da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11271da177e4SLinus Torvalds else 11281da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static void 11331da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11341da177e4SLinus Torvalds { 11351da177e4SLinus Torvalds unhash_stateowner(sop); 11361da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11371da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static inline void 11411da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11421da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11431da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1146ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1147ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11481da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11491da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1150ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11518beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11521da177e4SLinus Torvalds stp->st_stateowner = sop; 115313cd2184SNeilBrown get_nfs4_file(fp); 11541da177e4SLinus Torvalds stp->st_file = fp; 11551da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11561da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11571da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11581da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11591da177e4SLinus Torvalds stp->st_access_bmap = 0; 11601da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11611da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11621da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11634c4cd222SNeilBrown stp->st_openstp = NULL; 11641da177e4SLinus Torvalds } 11651da177e4SLinus Torvalds 11661da177e4SLinus Torvalds static void 11671da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11681da177e4SLinus Torvalds { 11691da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11701da177e4SLinus Torvalds 11711da177e4SLinus Torvalds list_del(&stp->st_hash); 11721da177e4SLinus Torvalds list_del(&stp->st_perfile); 1173ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11741da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11751da177e4SLinus Torvalds release_stateid_lockowners(stp); 11761da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11771da177e4SLinus Torvalds nfsd_close(filp); 11781da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11791da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 118013cd2184SNeilBrown put_nfs4_file(stp->st_file); 11815ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11821da177e4SLinus Torvalds } 11831da177e4SLinus Torvalds 1184fd39ca9aSNeilBrown static void 11851da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11861da177e4SLinus Torvalds { 11871da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds unhash_stateowner(sop); 11901da177e4SLinus Torvalds list_add_tail(&sop->so_close_lru, &close_lru); 11911da177e4SLinus Torvalds sop->so_time = get_seconds(); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 11941da177e4SLinus Torvalds static int 11951da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 11961da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 11971da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 11981da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds static struct nfs4_stateowner * 12021da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12031da177e4SLinus Torvalds { 12041da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12051da177e4SLinus Torvalds 12061da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12071da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12081da177e4SLinus Torvalds return so; 12091da177e4SLinus Torvalds } 12101da177e4SLinus Torvalds return NULL; 12111da177e4SLinus Torvalds } 12121da177e4SLinus Torvalds 12131da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12141da177e4SLinus Torvalds static struct nfs4_file * 12151da177e4SLinus Torvalds find_file(struct inode *ino) 12161da177e4SLinus Torvalds { 12171da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12181da177e4SLinus Torvalds struct nfs4_file *fp; 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 122113cd2184SNeilBrown if (fp->fi_inode == ino) { 122213cd2184SNeilBrown get_nfs4_file(fp); 12231da177e4SLinus Torvalds return fp; 12241da177e4SLinus Torvalds } 122513cd2184SNeilBrown } 12261da177e4SLinus Torvalds return NULL; 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12291da177e4SLinus Torvalds #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) 12301da177e4SLinus Torvalds #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) 12311da177e4SLinus Torvalds 1232fd39ca9aSNeilBrown static void 12331da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12341da177e4SLinus Torvalds int i; 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds *access = 0; 12371da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12381da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12391da177e4SLinus Torvalds *access |= i; 12401da177e4SLinus Torvalds } 12411da177e4SLinus Torvalds } 12421da177e4SLinus Torvalds 1243fd39ca9aSNeilBrown static void 12441da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12451da177e4SLinus Torvalds int i; 12461da177e4SLinus Torvalds 12471da177e4SLinus Torvalds *deny = 0; 12481da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12491da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12501da177e4SLinus Torvalds *deny |= i ; 12511da177e4SLinus Torvalds } 12521da177e4SLinus Torvalds } 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds static int 12551da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12561da177e4SLinus Torvalds unsigned int access, deny; 12571da177e4SLinus Torvalds 12581da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12591da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12601da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12611da177e4SLinus Torvalds return 0; 12621da177e4SLinus Torvalds return 1; 12631da177e4SLinus Torvalds } 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds /* 12661da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12671da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12681da177e4SLinus Torvalds */ 1269fd39ca9aSNeilBrown static int 12701da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12711da177e4SLinus Torvalds { 12721da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12731da177e4SLinus Torvalds struct nfs4_file *fp; 12741da177e4SLinus Torvalds struct nfs4_stateid *stp; 127513cd2184SNeilBrown int ret; 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12781da177e4SLinus Torvalds 12791da177e4SLinus Torvalds fp = find_file(ino); 128013cd2184SNeilBrown if (!fp) 128113cd2184SNeilBrown return nfs_ok; 1282b700949bSNeilBrown ret = nfserr_locked; 12831da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12848beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12851da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12861da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 128713cd2184SNeilBrown goto out; 12881da177e4SLinus Torvalds } 128913cd2184SNeilBrown ret = nfs_ok; 129013cd2184SNeilBrown out: 129113cd2184SNeilBrown put_nfs4_file(fp); 129213cd2184SNeilBrown return ret; 12931da177e4SLinus Torvalds } 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds static inline void 12961da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 12971da177e4SLinus Torvalds { 12981da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 12991da177e4SLinus Torvalds put_write_access(filp->f_dentry->d_inode); 13001da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13011da177e4SLinus Torvalds } 13021da177e4SLinus Torvalds } 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds /* 13051da177e4SLinus Torvalds * Recall a delegation 13061da177e4SLinus Torvalds */ 13071da177e4SLinus Torvalds static int 13081da177e4SLinus Torvalds do_recall(void *__dp) 13091da177e4SLinus Torvalds { 13101da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13111da177e4SLinus Torvalds 13121da177e4SLinus Torvalds daemonize("nfsv4-recall"); 13131da177e4SLinus Torvalds 13141da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13151da177e4SLinus Torvalds return 0; 13161da177e4SLinus Torvalds } 13171da177e4SLinus Torvalds 13181da177e4SLinus Torvalds /* 13191da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13201da177e4SLinus Torvalds * by the lease (file_lock) 13211da177e4SLinus Torvalds * 13221da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13231da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13241da177e4SLinus Torvalds * lease. 13251da177e4SLinus Torvalds */ 13261da177e4SLinus Torvalds static 13271da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13281da177e4SLinus Torvalds { 13291da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13301da177e4SLinus Torvalds struct task_struct *t; 13311da177e4SLinus Torvalds 13321da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13331da177e4SLinus Torvalds if (!dp) 13341da177e4SLinus Torvalds return; 13351da177e4SLinus Torvalds 13361da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13371da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13381da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13391da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13401da177e4SLinus Torvalds * it's safe to take a reference: */ 13411da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds spin_lock(&recall_lock); 13441da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13451da177e4SLinus Torvalds spin_unlock(&recall_lock); 13461da177e4SLinus Torvalds 13471da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13481da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13511da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13521da177e4SLinus Torvalds 13531da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13541da177e4SLinus Torvalds if (IS_ERR(t)) { 13551da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13581da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13591da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13601da177e4SLinus Torvalds nfs4_put_delegation(dp); 13611da177e4SLinus Torvalds } 13621da177e4SLinus Torvalds } 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds /* 13651da177e4SLinus Torvalds * The file_lock is being reapd. 13661da177e4SLinus Torvalds * 13671da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13681da177e4SLinus Torvalds */ 13691da177e4SLinus Torvalds static 13701da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13711da177e4SLinus Torvalds { 13721da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13731da177e4SLinus Torvalds 13741da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13751da177e4SLinus Torvalds 13761da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13771da177e4SLinus Torvalds return; 13781da177e4SLinus Torvalds dp->dl_flock = NULL; 13791da177e4SLinus Torvalds } 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds /* 13821da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13831da177e4SLinus Torvalds * 13841da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held. 13851da177e4SLinus Torvalds */ 13861da177e4SLinus Torvalds static 13871da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13881da177e4SLinus Torvalds { 13891da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 13901da177e4SLinus Torvalds 13911da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 13921da177e4SLinus Torvalds if (!dp) 13931da177e4SLinus Torvalds return; 13941da177e4SLinus Torvalds dp->dl_flock = new; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds /* 13981da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held 13991da177e4SLinus Torvalds */ 14001da177e4SLinus Torvalds static 14011da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14021da177e4SLinus Torvalds { 14031da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14041da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14051da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14061da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14071da177e4SLinus Torvalds 14081da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14091da177e4SLinus Torvalds return 0; 14101da177e4SLinus Torvalds 14111da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14121da177e4SLinus Torvalds } 14131da177e4SLinus Torvalds 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds static 14161da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14171da177e4SLinus Torvalds { 14181da177e4SLinus Torvalds if (arg & F_UNLCK) 14191da177e4SLinus Torvalds return lease_modify(onlist, arg); 14201da177e4SLinus Torvalds else 14211da177e4SLinus Torvalds return -EAGAIN; 14221da177e4SLinus Torvalds } 14231da177e4SLinus Torvalds 1424fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14251da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14261da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14271da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14281da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14291da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14301da177e4SLinus Torvalds }; 14311da177e4SLinus Torvalds 14321da177e4SLinus Torvalds 14331da177e4SLinus Torvalds int 14341da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14351da177e4SLinus Torvalds { 14361da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14371da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14381da177e4SLinus Torvalds unsigned int strhashval; 14391da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14401da177e4SLinus Torvalds 14411da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14420f442aa2SJ. Bruce Fields return nfserr_inval; 14431da177e4SLinus Torvalds 14441da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14451da177e4SLinus Torvalds return nfserr_stale_clientid; 14461da177e4SLinus Torvalds 14471da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14481da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14491da177e4SLinus Torvalds open->op_stateowner = sop; 14500f442aa2SJ. Bruce Fields if (!sop) { 14510f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14520f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14530f442aa2SJ. Bruce Fields if (clp == NULL) 14540f442aa2SJ. Bruce Fields return nfserr_expired; 14550f442aa2SJ. Bruce Fields goto renew; 14560f442aa2SJ. Bruce Fields } 1457ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14580f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1459ae8b6253SJ. Bruce Fields clp = sop->so_client; 1460ae8b6253SJ. Bruce Fields release_stateowner(sop); 14610f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1462ae8b6253SJ. Bruce Fields goto renew; 14630f442aa2SJ. Bruce Fields } 14640f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14651da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 14661da177e4SLinus Torvalds return NFSERR_REPLAY_ME; 14671da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14681da177e4SLinus Torvalds * that we don't even have replay data saved! 14691da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14701da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14711da177e4SLinus Torvalds * fail again for the same reason. 14721da177e4SLinus Torvalds */ 14730f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14741da177e4SLinus Torvalds goto renew; 14751da177e4SLinus Torvalds } 14760f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14770f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14780f442aa2SJ. Bruce Fields renew: 14790f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14801da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14811da177e4SLinus Torvalds if (sop == NULL) 14820f442aa2SJ. Bruce Fields return nfserr_resource; 14831da177e4SLinus Torvalds open->op_stateowner = sop; 14840f442aa2SJ. Bruce Fields } 14850f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14861da177e4SLinus Torvalds renew_client(sop->so_client); 14870f442aa2SJ. Bruce Fields return nfs_ok; 14881da177e4SLinus Torvalds } 14891da177e4SLinus Torvalds 14904a6e43e6SNeilBrown static inline int 14914a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 14924a6e43e6SNeilBrown { 14934a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 14944a6e43e6SNeilBrown return nfserr_openmode; 14954a6e43e6SNeilBrown else 14964a6e43e6SNeilBrown return nfs_ok; 14974a6e43e6SNeilBrown } 14984a6e43e6SNeilBrown 149952f4fb43SNeilBrown static struct nfs4_delegation * 150052f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 150152f4fb43SNeilBrown { 150252f4fb43SNeilBrown struct nfs4_delegation *dp; 150352f4fb43SNeilBrown 1504ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 150552f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 150652f4fb43SNeilBrown return dp; 150752f4fb43SNeilBrown } 150852f4fb43SNeilBrown return NULL; 150952f4fb43SNeilBrown } 151052f4fb43SNeilBrown 1511c44c5eebSNeilBrown static int 1512567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1513567d9829SNeilBrown struct nfs4_delegation **dp) 1514567d9829SNeilBrown { 1515567d9829SNeilBrown int flags; 1516c44c5eebSNeilBrown int status = nfserr_bad_stateid; 1517567d9829SNeilBrown 1518567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1519567d9829SNeilBrown if (*dp == NULL) 1520c44c5eebSNeilBrown goto out; 1521567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1522567d9829SNeilBrown RD_STATE : WR_STATE; 1523567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1524567d9829SNeilBrown if (status) 1525567d9829SNeilBrown *dp = NULL; 1526c44c5eebSNeilBrown out: 1527c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1528c44c5eebSNeilBrown return nfs_ok; 1529c44c5eebSNeilBrown if (status) 1530c44c5eebSNeilBrown return status; 1531c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1532c44c5eebSNeilBrown return nfs_ok; 1533567d9829SNeilBrown } 1534567d9829SNeilBrown 15351da177e4SLinus Torvalds static int 15361da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15371da177e4SLinus Torvalds { 15381da177e4SLinus Torvalds struct nfs4_stateid *local; 15391da177e4SLinus Torvalds int status = nfserr_share_denied; 15401da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15411da177e4SLinus Torvalds 15428beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15431da177e4SLinus Torvalds /* ignore lock owners */ 15441da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15451da177e4SLinus Torvalds continue; 15461da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15471da177e4SLinus Torvalds if (local->st_stateowner == sop) 15481da177e4SLinus Torvalds *stpp = local; 15491da177e4SLinus Torvalds /* check for conflicting share reservations */ 15501da177e4SLinus Torvalds if (!test_share(local, open)) 15511da177e4SLinus Torvalds goto out; 15521da177e4SLinus Torvalds } 15531da177e4SLinus Torvalds status = 0; 15541da177e4SLinus Torvalds out: 15551da177e4SLinus Torvalds return status; 15561da177e4SLinus Torvalds } 15571da177e4SLinus Torvalds 15585ac049acSNeilBrown static inline struct nfs4_stateid * 15595ac049acSNeilBrown nfs4_alloc_stateid(void) 15605ac049acSNeilBrown { 15615ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15625ac049acSNeilBrown } 15635ac049acSNeilBrown 15641da177e4SLinus Torvalds static int 15651da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1566567d9829SNeilBrown struct nfs4_delegation *dp, 15671da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15681da177e4SLinus Torvalds { 15691da177e4SLinus Torvalds struct nfs4_stateid *stp; 15701da177e4SLinus Torvalds 15715ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15721da177e4SLinus Torvalds if (stp == NULL) 15731da177e4SLinus Torvalds return nfserr_resource; 15741da177e4SLinus Torvalds 1575567d9829SNeilBrown if (dp) { 1576567d9829SNeilBrown get_file(dp->dl_vfs_file); 1577567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1578567d9829SNeilBrown } else { 1579567d9829SNeilBrown int status; 1580567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1581567d9829SNeilBrown &stp->st_vfs_file); 15821da177e4SLinus Torvalds if (status) { 15831da177e4SLinus Torvalds if (status == nfserr_dropit) 15841da177e4SLinus Torvalds status = nfserr_jukebox; 15855ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15861da177e4SLinus Torvalds return status; 15871da177e4SLinus Torvalds } 1588567d9829SNeilBrown } 15891da177e4SLinus Torvalds *stpp = stp; 15901da177e4SLinus Torvalds return 0; 15911da177e4SLinus Torvalds } 15921da177e4SLinus Torvalds 15931da177e4SLinus Torvalds static inline int 15941da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 15951da177e4SLinus Torvalds struct nfsd4_open *open) 15961da177e4SLinus Torvalds { 15971da177e4SLinus Torvalds struct iattr iattr = { 15981da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 15991da177e4SLinus Torvalds .ia_size = 0, 16001da177e4SLinus Torvalds }; 16011da177e4SLinus Torvalds if (!open->op_truncate) 16021da177e4SLinus Torvalds return 0; 16031da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16049246585aSAl Viro return nfserr_inval; 16051da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16061da177e4SLinus Torvalds } 16071da177e4SLinus Torvalds 16081da177e4SLinus Torvalds static int 16091da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16101da177e4SLinus Torvalds { 16111da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16121da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 16136c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 16141da177e4SLinus Torvalds int status; 16151da177e4SLinus Torvalds 16161da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16176c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16186c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16191da177e4SLinus Torvalds 16206c26d08fSJ. Bruce Fields if (new_writer) { 16211da177e4SLinus Torvalds status = get_write_access(inode); 16221da177e4SLinus Torvalds if (status) 16231da177e4SLinus Torvalds return nfserrno(status); 16246c26d08fSJ. Bruce Fields } 16251da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16261da177e4SLinus Torvalds if (status) { 16276c26d08fSJ. Bruce Fields if (new_writer) 16281da177e4SLinus Torvalds put_write_access(inode); 16291da177e4SLinus Torvalds return status; 16301da177e4SLinus Torvalds } 16311da177e4SLinus Torvalds /* remember the open */ 16326c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16331da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16341da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16351da177e4SLinus Torvalds 16361da177e4SLinus Torvalds return nfs_ok; 16371da177e4SLinus Torvalds } 16381da177e4SLinus Torvalds 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds static void 164137515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16421da177e4SLinus Torvalds { 16431da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1644c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16451da177e4SLinus Torvalds } 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds /* 16481da177e4SLinus Torvalds * Attempt to hand out a delegation. 16491da177e4SLinus Torvalds */ 16501da177e4SLinus Torvalds static void 16511da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16521da177e4SLinus Torvalds { 16531da177e4SLinus Torvalds struct nfs4_delegation *dp; 16541da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16551da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16561da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16571da177e4SLinus Torvalds int status, flag = 0; 16581da177e4SLinus Torvalds 16591da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16607b190fecSNeilBrown open->op_recall = 0; 16617b190fecSNeilBrown switch (open->op_claim_type) { 16627b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16637b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16647b190fecSNeilBrown open->op_recall = 1; 16657b190fecSNeilBrown flag = open->op_delegate_type; 16667b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16671da177e4SLinus Torvalds goto out; 16687b190fecSNeilBrown break; 16697b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16707b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16717b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16727b190fecSNeilBrown if (nfs4_in_grace()) 16737b190fecSNeilBrown goto out; 16747b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16757b190fecSNeilBrown goto out; 16761da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16771da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16781da177e4SLinus Torvalds else 16791da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16807b190fecSNeilBrown break; 16817b190fecSNeilBrown default: 16827b190fecSNeilBrown goto out; 16837b190fecSNeilBrown } 16841da177e4SLinus Torvalds 16851da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16861da177e4SLinus Torvalds if (dp == NULL) { 16871da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16881da177e4SLinus Torvalds goto out; 16891da177e4SLinus Torvalds } 16901da177e4SLinus Torvalds locks_init_lock(&fl); 16911da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 16921da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 16931da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 16941da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 16951da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 16961da177e4SLinus Torvalds fl.fl_pid = current->tgid; 16971da177e4SLinus Torvalds 16981da177e4SLinus Torvalds /* setlease checks to see if delegation should be handed out. 16991da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17001da177e4SLinus Torvalds */ 17011da177e4SLinus Torvalds if ((status = setlease(stp->st_vfs_file, 17021da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17031da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1704c907132dSNeilBrown unhash_delegation(dp); 17051da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17061da177e4SLinus Torvalds goto out; 17071da177e4SLinus Torvalds } 17081da177e4SLinus Torvalds 17091da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17101da177e4SLinus Torvalds 17111da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17121da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17131da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17141da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17151da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17161da177e4SLinus Torvalds out: 17177b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17187b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17197b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17207b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17211da177e4SLinus Torvalds open->op_delegate_type = flag; 17221da177e4SLinus Torvalds } 17231da177e4SLinus Torvalds 17241da177e4SLinus Torvalds /* 17251da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17261da177e4SLinus Torvalds */ 17271da177e4SLinus Torvalds int 17281da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17291da177e4SLinus Torvalds { 17301da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17311da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17321da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1733567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 17341da177e4SLinus Torvalds int status; 17351da177e4SLinus Torvalds 17361da177e4SLinus Torvalds status = nfserr_inval; 17371da177e4SLinus Torvalds if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) 17381da177e4SLinus Torvalds goto out; 17391da177e4SLinus Torvalds /* 17401da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17411da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17421da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17431da177e4SLinus Torvalds */ 17441da177e4SLinus Torvalds fp = find_file(ino); 17451da177e4SLinus Torvalds if (fp) { 17461da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17471da177e4SLinus Torvalds goto out; 1748c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1749c44c5eebSNeilBrown if (status) 1750c44c5eebSNeilBrown goto out; 17511da177e4SLinus Torvalds } else { 1752c44c5eebSNeilBrown status = nfserr_bad_stateid; 1753c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1754c44c5eebSNeilBrown goto out; 17551da177e4SLinus Torvalds status = nfserr_resource; 17561da177e4SLinus Torvalds fp = alloc_init_file(ino); 17571da177e4SLinus Torvalds if (fp == NULL) 17581da177e4SLinus Torvalds goto out; 17591da177e4SLinus Torvalds } 17601da177e4SLinus Torvalds 17611da177e4SLinus Torvalds /* 17621da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17631da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17641da177e4SLinus Torvalds */ 17651da177e4SLinus Torvalds if (stp) { 17661da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17671da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17681da177e4SLinus Torvalds if (status) 17691da177e4SLinus Torvalds goto out; 1770444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17711da177e4SLinus Torvalds } else { 17721da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17731da177e4SLinus Torvalds int flags = 0; 17741da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17751da177e4SLinus Torvalds flags = MAY_WRITE; 17761da177e4SLinus Torvalds else 17771da177e4SLinus Torvalds flags = MAY_READ; 1778567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1779567d9829SNeilBrown if (status) 17801da177e4SLinus Torvalds goto out; 17811da177e4SLinus Torvalds init_stateid(stp, fp, open); 17821da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17831da177e4SLinus Torvalds if (status) { 17841da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17851da177e4SLinus Torvalds goto out; 17861da177e4SLinus Torvalds } 17871da177e4SLinus Torvalds } 17881da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 17891da177e4SLinus Torvalds 17901da177e4SLinus Torvalds /* 17911da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 17921da177e4SLinus Torvalds * OPEN succeeds even if we fail. 17931da177e4SLinus Torvalds */ 17941da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds status = nfs_ok; 17971da177e4SLinus Torvalds 17981da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 17991da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18001da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18011da177e4SLinus Torvalds out: 180213cd2184SNeilBrown if (fp) 180313cd2184SNeilBrown put_nfs4_file(fp); 180437515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 180537515177SNeilBrown nfs4_set_claim_prev(open); 18061da177e4SLinus Torvalds /* 18071da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18081da177e4SLinus Torvalds */ 18091da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18101da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18111da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18121da177e4SLinus Torvalds 18131da177e4SLinus Torvalds return status; 18141da177e4SLinus Torvalds } 18151da177e4SLinus Torvalds 181658da282bSNeilBrown static struct workqueue_struct *laundry_wq; 18171da177e4SLinus Torvalds static struct work_struct laundromat_work; 18181da177e4SLinus Torvalds static void laundromat_main(void *); 18191da177e4SLinus Torvalds static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 18201da177e4SLinus Torvalds 18211da177e4SLinus Torvalds int 18221da177e4SLinus Torvalds nfsd4_renew(clientid_t *clid) 18231da177e4SLinus Torvalds { 18241da177e4SLinus Torvalds struct nfs4_client *clp; 18251da177e4SLinus Torvalds int status; 18261da177e4SLinus Torvalds 18271da177e4SLinus Torvalds nfs4_lock_state(); 18281da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18291da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18301da177e4SLinus Torvalds status = nfserr_stale_clientid; 18311da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18321da177e4SLinus Torvalds goto out; 18331da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18341da177e4SLinus Torvalds status = nfserr_expired; 18351da177e4SLinus Torvalds if (clp == NULL) { 18361da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18371da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18381da177e4SLinus Torvalds goto out; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds renew_client(clp); 18411da177e4SLinus Torvalds status = nfserr_cb_path_down; 1842ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18431da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18441da177e4SLinus Torvalds goto out; 18451da177e4SLinus Torvalds status = nfs_ok; 18461da177e4SLinus Torvalds out: 18471da177e4SLinus Torvalds nfs4_unlock_state(); 18481da177e4SLinus Torvalds return status; 18491da177e4SLinus Torvalds } 18501da177e4SLinus Torvalds 1851a76b4319SNeilBrown static void 1852a76b4319SNeilBrown end_grace(void) 1853a76b4319SNeilBrown { 1854a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1855c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1856a76b4319SNeilBrown in_grace = 0; 1857a76b4319SNeilBrown } 1858a76b4319SNeilBrown 1859fd39ca9aSNeilBrown static time_t 18601da177e4SLinus Torvalds nfs4_laundromat(void) 18611da177e4SLinus Torvalds { 18621da177e4SLinus Torvalds struct nfs4_client *clp; 18631da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18641da177e4SLinus Torvalds struct nfs4_delegation *dp; 18651da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18661da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18671da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18681da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18691da177e4SLinus Torvalds 18701da177e4SLinus Torvalds nfs4_lock_state(); 18711da177e4SLinus Torvalds 18721da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1873a76b4319SNeilBrown if (in_grace) 1874a76b4319SNeilBrown end_grace(); 18751da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18761da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18771da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18781da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18791da177e4SLinus Torvalds if (clientid_val > t) 18801da177e4SLinus Torvalds clientid_val = t; 18811da177e4SLinus Torvalds break; 18821da177e4SLinus Torvalds } 18831da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18841da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1885c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18861da177e4SLinus Torvalds expire_client(clp); 18871da177e4SLinus Torvalds } 18881da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 18891da177e4SLinus Torvalds spin_lock(&recall_lock); 18901da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 18911da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18921da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 18931da177e4SLinus Torvalds u = dp->dl_time - cutoff; 18941da177e4SLinus Torvalds if (test_val > u) 18951da177e4SLinus Torvalds test_val = u; 18961da177e4SLinus Torvalds break; 18971da177e4SLinus Torvalds } 18981da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 18991da177e4SLinus Torvalds dp, dp->dl_flock); 19001da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19011da177e4SLinus Torvalds } 19021da177e4SLinus Torvalds spin_unlock(&recall_lock); 19031da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19041da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19051da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19061da177e4SLinus Torvalds unhash_delegation(dp); 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19091da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19101da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19111da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19121da177e4SLinus Torvalds u = sop->so_time - cutoff; 19131da177e4SLinus Torvalds if (test_val > u) 19141da177e4SLinus Torvalds test_val = u; 19151da177e4SLinus Torvalds break; 19161da177e4SLinus Torvalds } 19171da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19181da177e4SLinus Torvalds sop->so_id); 19191da177e4SLinus Torvalds list_del(&sop->so_close_lru); 19201da177e4SLinus Torvalds nfs4_put_stateowner(sop); 19211da177e4SLinus Torvalds } 19221da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19231da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19241da177e4SLinus Torvalds nfs4_unlock_state(); 19251da177e4SLinus Torvalds return clientid_val; 19261da177e4SLinus Torvalds } 19271da177e4SLinus Torvalds 19281da177e4SLinus Torvalds void 19291da177e4SLinus Torvalds laundromat_main(void *not_used) 19301da177e4SLinus Torvalds { 19311da177e4SLinus Torvalds time_t t; 19321da177e4SLinus Torvalds 19331da177e4SLinus Torvalds t = nfs4_laundromat(); 19341da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 193558da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19361da177e4SLinus Torvalds } 19371da177e4SLinus Torvalds 1938fd39ca9aSNeilBrown static struct nfs4_stateowner * 1939f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1940f8816512SNeilBrown { 19411da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19421da177e4SLinus Torvalds 19431da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19441da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19451da177e4SLinus Torvalds if (local->so_id == st_id) 19461da177e4SLinus Torvalds return local; 19471da177e4SLinus Torvalds } 19481da177e4SLinus Torvalds } 19491da177e4SLinus Torvalds return NULL; 19501da177e4SLinus Torvalds } 19511da177e4SLinus Torvalds 19521da177e4SLinus Torvalds static inline int 19531da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19541da177e4SLinus Torvalds { 19551da177e4SLinus Torvalds return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 19561da177e4SLinus Torvalds } 19571da177e4SLinus Torvalds 19581da177e4SLinus Torvalds static int 19591da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19601da177e4SLinus Torvalds { 19611da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19621da177e4SLinus Torvalds return 0; 1963849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19641da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19651da177e4SLinus Torvalds stateid->si_generation); 19661da177e4SLinus Torvalds return 1; 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds static inline int 19701da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19711da177e4SLinus Torvalds { 19721da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19731da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19741da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19751da177e4SLinus Torvalds } 19761da177e4SLinus Torvalds 19771da177e4SLinus Torvalds static inline int 19781da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19791da177e4SLinus Torvalds { 19801da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19811da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds static 19851da177e4SLinus Torvalds int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19861da177e4SLinus Torvalds { 19871da177e4SLinus Torvalds int status = nfserr_openmode; 19881da177e4SLinus Torvalds 19891da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 19901da177e4SLinus Torvalds goto out; 19911da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 19921da177e4SLinus Torvalds goto out; 19931da177e4SLinus Torvalds status = nfs_ok; 19941da177e4SLinus Torvalds out: 19951da177e4SLinus Torvalds return status; 19961da177e4SLinus Torvalds } 19971da177e4SLinus Torvalds 19981da177e4SLinus Torvalds static inline int 19991da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20001da177e4SLinus Torvalds { 20011da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20021da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20031da177e4SLinus Torvalds return nfserr_bad_stateid; 20041da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20051da177e4SLinus Torvalds return nfs_ok; 20061da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20071da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20081da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20091da177e4SLinus Torvalds return nfserr_grace; 20101da177e4SLinus Torvalds } else if (flags & WR_STATE) 20111da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20121da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20131da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20141da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20151da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20161da177e4SLinus Torvalds } 20171da177e4SLinus Torvalds 20181da177e4SLinus Torvalds /* 20191da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20201da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20211da177e4SLinus Torvalds */ 20221da177e4SLinus Torvalds static inline int 20231da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20241da177e4SLinus Torvalds { 20251da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 20261da177e4SLinus Torvalds && MANDATORY_LOCK(inode); 20271da177e4SLinus Torvalds } 20281da177e4SLinus Torvalds 20291da177e4SLinus Torvalds /* 20301da177e4SLinus Torvalds * Checks for stateid operations 20311da177e4SLinus Torvalds */ 20321da177e4SLinus Torvalds int 20331da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20341da177e4SLinus Torvalds { 20351da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20361da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20371da177e4SLinus Torvalds stateid_t *stidp; 20381da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20391da177e4SLinus Torvalds int status; 20401da177e4SLinus Torvalds 20411da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20421da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20431da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20441da177e4SLinus Torvalds if (filpp) 20451da177e4SLinus Torvalds *filpp = NULL; 20461da177e4SLinus Torvalds 20471da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20481da177e4SLinus Torvalds return nfserr_grace; 20491da177e4SLinus Torvalds 20501da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20511da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20521da177e4SLinus Torvalds 20531da177e4SLinus Torvalds /* STALE STATEID */ 20541da177e4SLinus Torvalds status = nfserr_stale_stateid; 20551da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20561da177e4SLinus Torvalds goto out; 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds /* BAD STATEID */ 20591da177e4SLinus Torvalds status = nfserr_bad_stateid; 20601da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20611da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20621da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20631da177e4SLinus Torvalds if (nfs4_in_grace()) 20641da177e4SLinus Torvalds status = nfserr_grace; 20651da177e4SLinus Torvalds goto out; 20661da177e4SLinus Torvalds } 20671da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20681da177e4SLinus Torvalds } else { /* open or lock stateid */ 20691da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20701da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20711da177e4SLinus Torvalds if (nfs4_in_grace()) 20721da177e4SLinus Torvalds status = nfserr_grace; 20731da177e4SLinus Torvalds goto out; 20741da177e4SLinus Torvalds } 20751da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20761da177e4SLinus Torvalds goto out; 20771da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20781da177e4SLinus Torvalds goto out; 20791da177e4SLinus Torvalds stidp = &stp->st_stateid; 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 20821da177e4SLinus Torvalds goto out; 20831da177e4SLinus Torvalds 20841da177e4SLinus Torvalds /* OLD STATEID */ 20851da177e4SLinus Torvalds status = nfserr_old_stateid; 20861da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 20871da177e4SLinus Torvalds goto out; 20881da177e4SLinus Torvalds if (stp) { 20891da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 20901da177e4SLinus Torvalds goto out; 20911da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 20921da177e4SLinus Torvalds if (filpp) 20931da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 20941da177e4SLinus Torvalds } else if (dp) { 20951da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 20961da177e4SLinus Torvalds goto out; 20971da177e4SLinus Torvalds renew_client(dp->dl_client); 20981da177e4SLinus Torvalds if (flags & DELEG_RET) 20991da177e4SLinus Torvalds unhash_delegation(dp); 21001da177e4SLinus Torvalds if (filpp) 21011da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21021da177e4SLinus Torvalds } 21031da177e4SLinus Torvalds status = nfs_ok; 21041da177e4SLinus Torvalds out: 21051da177e4SLinus Torvalds return status; 21061da177e4SLinus Torvalds } 21071da177e4SLinus Torvalds 21084c4cd222SNeilBrown static inline int 21094c4cd222SNeilBrown setlkflg (int type) 21104c4cd222SNeilBrown { 21114c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21124c4cd222SNeilBrown RD_STATE : WR_STATE; 21134c4cd222SNeilBrown } 21141da177e4SLinus Torvalds 21151da177e4SLinus Torvalds /* 21161da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21171da177e4SLinus Torvalds */ 2118fd39ca9aSNeilBrown static int 21194c4cd222SNeilBrown 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) 21201da177e4SLinus Torvalds { 21211da177e4SLinus Torvalds struct nfs4_stateid *stp; 21221da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21231da177e4SLinus Torvalds 21241da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21251da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21261da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21271da177e4SLinus Torvalds stateid->si_generation); 21281da177e4SLinus Torvalds 21291da177e4SLinus Torvalds *stpp = NULL; 21301da177e4SLinus Torvalds *sopp = NULL; 21311da177e4SLinus Torvalds 21321da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21331da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21343a4f98bbSNeilBrown return nfserr_bad_stateid; 21351da177e4SLinus Torvalds } 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21383a4f98bbSNeilBrown return nfserr_stale_stateid; 21391da177e4SLinus Torvalds /* 21401da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21411da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21421da177e4SLinus Torvalds * number is incorrect. 21431da177e4SLinus Torvalds */ 2144f8816512SNeilBrown stp = find_stateid(stateid, flags); 2145f8816512SNeilBrown if (stp == NULL) { 2146f8816512SNeilBrown /* 2147f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2148f8816512SNeilBrown * a replayed close: 2149f8816512SNeilBrown */ 2150f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2151f8816512SNeilBrown if (sop == NULL) 2152f8816512SNeilBrown return nfserr_bad_stateid; 2153f8816512SNeilBrown *sopp = sop; 2154f8816512SNeilBrown goto check_replay; 2155f8816512SNeilBrown } 21561da177e4SLinus Torvalds 21574c4cd222SNeilBrown if (lock) { 21581da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21594c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21601da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21614c4cd222SNeilBrown int lkflg = 0; 21624c4cd222SNeilBrown int status; 21631da177e4SLinus Torvalds 21644c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21654c4cd222SNeilBrown 21664c4cd222SNeilBrown if (lock->lk_is_new) { 21671da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21683a4f98bbSNeilBrown return nfserr_bad_stateid; 21691da177e4SLinus Torvalds if (!cmp_clid(&clp->cl_clientid, lockclid)) 21703a4f98bbSNeilBrown return nfserr_bad_stateid; 21714c4cd222SNeilBrown /* stp is the open stateid */ 21724c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21734c4cd222SNeilBrown if (status) 21744c4cd222SNeilBrown return status; 21754c4cd222SNeilBrown } else { 21764c4cd222SNeilBrown /* stp is the lock stateid */ 21774c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21784c4cd222SNeilBrown if (status) 21794c4cd222SNeilBrown return status; 21804c4cd222SNeilBrown } 21814c4cd222SNeilBrown 21821da177e4SLinus Torvalds } 21831da177e4SLinus Torvalds 21841da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 21851da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21863a4f98bbSNeilBrown return nfserr_bad_stateid; 21871da177e4SLinus Torvalds } 21881da177e4SLinus Torvalds 21891da177e4SLinus Torvalds *stpp = stp; 21901da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 21911da177e4SLinus Torvalds 21921da177e4SLinus Torvalds /* 21931da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 21941da177e4SLinus Torvalds * For the moment, we ignore the possibility of 21951da177e4SLinus Torvalds * generation number wraparound. 21961da177e4SLinus Torvalds */ 2197bd9aac52SNeilBrown if (seqid != sop->so_seqid) 21981da177e4SLinus Torvalds goto check_replay; 21991da177e4SLinus Torvalds 22003a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22013a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: expected" 22023a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22033a4f98bbSNeilBrown return nfserr_bad_stateid; 22041da177e4SLinus Torvalds } 22053a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22063a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: stateowner not" 22073a4f98bbSNeilBrown " confirmed yet!\n"); 22083a4f98bbSNeilBrown return nfserr_bad_stateid; 22091da177e4SLinus Torvalds } 22101da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22111da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22123a4f98bbSNeilBrown return nfserr_bad_stateid; 22131da177e4SLinus Torvalds } 22141da177e4SLinus Torvalds 22151da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22161da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: old stateid!\n"); 22173a4f98bbSNeilBrown return nfserr_old_stateid; 22181da177e4SLinus Torvalds } 221952fd004eSNeilBrown renew_client(sop->so_client); 22203a4f98bbSNeilBrown return nfs_ok; 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds check_replay: 2223bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2224849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22251da177e4SLinus Torvalds /* indicate replay to calling function */ 22263a4f98bbSNeilBrown return NFSERR_REPLAY_ME; 22271da177e4SLinus Torvalds } 22283a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22293a4f98bbSNeilBrown sop->so_seqid, seqid); 22303a4f98bbSNeilBrown *sopp = NULL; 22313a4f98bbSNeilBrown return nfserr_bad_seqid; 22321da177e4SLinus Torvalds } 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds int 2235f2327d9aSNeil Brown nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner) 22361da177e4SLinus Torvalds { 22371da177e4SLinus Torvalds int status; 22381da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22391da177e4SLinus Torvalds struct nfs4_stateid *stp; 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 22421da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 22431da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 22441da177e4SLinus Torvalds 22451da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 22461da177e4SLinus Torvalds goto out; 22471da177e4SLinus Torvalds 22481da177e4SLinus Torvalds nfs4_lock_state(); 22491da177e4SLinus Torvalds 22501da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 22511da177e4SLinus Torvalds &oc->oc_req_stateid, 22521da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22531da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22541da177e4SLinus Torvalds goto out; 22551da177e4SLinus Torvalds 22561da177e4SLinus Torvalds sop = oc->oc_stateowner; 22571da177e4SLinus Torvalds sop->so_confirmed = 1; 22581da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22591da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22601da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22611da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22621da177e4SLinus Torvalds stp->st_stateid.si_boot, 22631da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22641da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22651da177e4SLinus Torvalds stp->st_stateid.si_generation); 2266c7b9a459SNeilBrown 2267c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22681da177e4SLinus Torvalds out: 2269f2327d9aSNeil Brown if (oc->oc_stateowner) { 22701da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2271f2327d9aSNeil Brown *replay_owner = oc->oc_stateowner; 2272f2327d9aSNeil Brown } 22731da177e4SLinus Torvalds nfs4_unlock_state(); 22741da177e4SLinus Torvalds return status; 22751da177e4SLinus Torvalds } 22761da177e4SLinus Torvalds 22771da177e4SLinus Torvalds 22781da177e4SLinus Torvalds /* 22791da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22801da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22811da177e4SLinus Torvalds */ 22821da177e4SLinus Torvalds static void 22831da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22841da177e4SLinus Torvalds { 22851da177e4SLinus Torvalds int i; 22861da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22871da177e4SLinus Torvalds if ((i & access) != i) 22881da177e4SLinus Torvalds __clear_bit(i, bmap); 22891da177e4SLinus Torvalds } 22901da177e4SLinus Torvalds } 22911da177e4SLinus Torvalds 22921da177e4SLinus Torvalds static void 22931da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 22941da177e4SLinus Torvalds { 22951da177e4SLinus Torvalds int i; 22961da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22971da177e4SLinus Torvalds if ((i & deny) != i) 22981da177e4SLinus Torvalds __clear_bit(i, bmap); 22991da177e4SLinus Torvalds } 23001da177e4SLinus Torvalds } 23011da177e4SLinus Torvalds 23021da177e4SLinus Torvalds int 2303f2327d9aSNeil Brown nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) 23041da177e4SLinus Torvalds { 23051da177e4SLinus Torvalds int status; 23061da177e4SLinus Torvalds struct nfs4_stateid *stp; 23071da177e4SLinus Torvalds unsigned int share_access; 23081da177e4SLinus Torvalds 23091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 23101da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23111da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23121da177e4SLinus Torvalds 23131da177e4SLinus Torvalds if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) 23141da177e4SLinus Torvalds return nfserr_inval; 23151da177e4SLinus Torvalds 23161da177e4SLinus Torvalds nfs4_lock_state(); 23171da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 23181da177e4SLinus Torvalds &od->od_stateid, 23191da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23201da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23211da177e4SLinus Torvalds goto out; 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds status = nfserr_inval; 23241da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23251da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23261da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23271da177e4SLinus Torvalds goto out; 23281da177e4SLinus Torvalds } 23291da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23301da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23311da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23321da177e4SLinus Torvalds goto out; 23331da177e4SLinus Torvalds } 23341da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23351da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23361da177e4SLinus Torvalds share_access & ~od->od_share_access); 23371da177e4SLinus Torvalds 23381da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23391da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23401da177e4SLinus Torvalds 23411da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23421da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23431da177e4SLinus Torvalds status = nfs_ok; 23441da177e4SLinus Torvalds out: 2345f2327d9aSNeil Brown if (od->od_stateowner) { 23461da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2347f2327d9aSNeil Brown *replay_owner = od->od_stateowner; 2348f2327d9aSNeil Brown } 23491da177e4SLinus Torvalds nfs4_unlock_state(); 23501da177e4SLinus Torvalds return status; 23511da177e4SLinus Torvalds } 23521da177e4SLinus Torvalds 23531da177e4SLinus Torvalds /* 23541da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23551da177e4SLinus Torvalds */ 23561da177e4SLinus Torvalds int 2357f2327d9aSNeil Brown nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) 23581da177e4SLinus Torvalds { 23591da177e4SLinus Torvalds int status; 23601da177e4SLinus Torvalds struct nfs4_stateid *stp; 23611da177e4SLinus Torvalds 23621da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 23631da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23641da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23651da177e4SLinus Torvalds 23661da177e4SLinus Torvalds nfs4_lock_state(); 23671da177e4SLinus Torvalds /* check close_lru for replay */ 23681da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 23691da177e4SLinus Torvalds &close->cl_stateid, 23701da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23711da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23721da177e4SLinus Torvalds goto out; 23731da177e4SLinus Torvalds status = nfs_ok; 23741da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23751da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23761da177e4SLinus Torvalds 237704ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 237804ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 237904ef5954SJ. Bruce Fields 238004ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 238104ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 238204ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 238304ef5954SJ. Bruce Fields */ 238404ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 238504ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23861da177e4SLinus Torvalds out: 2387f2327d9aSNeil Brown if (close->cl_stateowner) { 23881da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2389f2327d9aSNeil Brown *replay_owner = close->cl_stateowner; 2390f2327d9aSNeil Brown } 23911da177e4SLinus Torvalds nfs4_unlock_state(); 23921da177e4SLinus Torvalds return status; 23931da177e4SLinus Torvalds } 23941da177e4SLinus Torvalds 23951da177e4SLinus Torvalds int 23961da177e4SLinus Torvalds nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 23971da177e4SLinus Torvalds { 23981da177e4SLinus Torvalds int status; 23991da177e4SLinus Torvalds 24001da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 24011da177e4SLinus Torvalds goto out; 24021da177e4SLinus Torvalds 24031da177e4SLinus Torvalds nfs4_lock_state(); 24041da177e4SLinus Torvalds status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 24051da177e4SLinus Torvalds nfs4_unlock_state(); 24061da177e4SLinus Torvalds out: 24071da177e4SLinus Torvalds return status; 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds /* 24121da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24131da177e4SLinus Torvalds */ 24141da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24151da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24161da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24171da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24181da177e4SLinus Torvalds 24191da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24201da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24211da177e4SLinus Torvalds 24221da177e4SLinus Torvalds static inline unsigned int 24231da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24241da177e4SLinus Torvalds struct xdr_netobj *ownername) 24251da177e4SLinus Torvalds { 24261da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24271da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24281da177e4SLinus Torvalds & LOCK_HASH_MASK; 24291da177e4SLinus Torvalds } 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24321da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24331da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24341da177e4SLinus Torvalds 2435fd39ca9aSNeilBrown static struct nfs4_stateid * 24361da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24371da177e4SLinus Torvalds { 24381da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24391da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24401da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24411da177e4SLinus Torvalds unsigned int hashval; 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24441da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24451da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24461da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24471da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24481da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24491da177e4SLinus Torvalds return local; 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24531da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24541da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24551da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24561da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24571da177e4SLinus Torvalds return local; 24581da177e4SLinus Torvalds } 2459849823c5SNeil Brown } 24601da177e4SLinus Torvalds return NULL; 24611da177e4SLinus Torvalds } 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds static struct nfs4_delegation * 24641da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24651da177e4SLinus Torvalds { 246613cd2184SNeilBrown struct nfs4_file *fp; 246713cd2184SNeilBrown struct nfs4_delegation *dl; 24681da177e4SLinus Torvalds 24691da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24701da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24711da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds fp = find_file(ino); 247413cd2184SNeilBrown if (!fp) 24751da177e4SLinus Torvalds return NULL; 247613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 247713cd2184SNeilBrown put_nfs4_file(fp); 247813cd2184SNeilBrown return dl; 24791da177e4SLinus Torvalds } 24801da177e4SLinus Torvalds 24811da177e4SLinus Torvalds /* 24821da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24831da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24841da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24851da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24861da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24871da177e4SLinus Torvalds * the VFS, but this is a very deep change! 24881da177e4SLinus Torvalds */ 24891da177e4SLinus Torvalds static inline void 24901da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 24911da177e4SLinus Torvalds { 24921da177e4SLinus Torvalds if (lock->fl_start < 0) 24931da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 24941da177e4SLinus Torvalds if (lock->fl_end < 0) 24951da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds 2498d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2499d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2500e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2501d5b9026aSNeilBrown }; 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds static inline void 25041da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25051da177e4SLinus Torvalds { 2506d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2507d5b9026aSNeilBrown unsigned int hval; 25081da177e4SLinus Torvalds 2509d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2510d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2511d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25121da177e4SLinus Torvalds kref_get(&sop->so_ref); 25131da177e4SLinus Torvalds deny->ld_sop = sop; 25141da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2515d5b9026aSNeilBrown } else { 2516d5b9026aSNeilBrown deny->ld_sop = NULL; 2517d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2518d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25191da177e4SLinus Torvalds } 25201da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25211da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25221da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25231da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25241da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25251da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25261da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds 25291da177e4SLinus Torvalds static struct nfs4_stateowner * 25301da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25311da177e4SLinus Torvalds struct xdr_netobj *owner) 25321da177e4SLinus Torvalds { 25331da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25341da177e4SLinus Torvalds struct nfs4_stateowner *op; 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25371da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25381da177e4SLinus Torvalds return op; 25391da177e4SLinus Torvalds } 25401da177e4SLinus Torvalds return NULL; 25411da177e4SLinus Torvalds } 25421da177e4SLinus Torvalds 25431da177e4SLinus Torvalds /* 25441da177e4SLinus Torvalds * Alloc a lock owner structure. 25451da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25461da177e4SLinus Torvalds * occured. 25471da177e4SLinus Torvalds * 25481da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25491da177e4SLinus Torvalds */ 25501da177e4SLinus Torvalds 25511da177e4SLinus Torvalds static struct nfs4_stateowner * 25521da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25531da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25541da177e4SLinus Torvalds struct nfs4_replay *rp; 25551da177e4SLinus Torvalds unsigned int idhashval; 25561da177e4SLinus Torvalds 25571da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25581da177e4SLinus Torvalds return NULL; 25591da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25601da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25611da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25621da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2563ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2564ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25651da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25661da177e4SLinus Torvalds sop->so_time = 0; 25671da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25681da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2569ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25701da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25711da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25721da177e4SLinus Torvalds sop->so_client = clp; 2573b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2574b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2575b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25761da177e4SLinus Torvalds sop->so_confirmed = 1; 25771da177e4SLinus Torvalds rp = &sop->so_replay; 2578de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25791da177e4SLinus Torvalds rp->rp_buflen = 0; 25801da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25811da177e4SLinus Torvalds return sop; 25821da177e4SLinus Torvalds } 25831da177e4SLinus Torvalds 2584fd39ca9aSNeilBrown static struct nfs4_stateid * 25851da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25861da177e4SLinus Torvalds { 25871da177e4SLinus Torvalds struct nfs4_stateid *stp; 25881da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 25891da177e4SLinus Torvalds 25905ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25915ac049acSNeilBrown if (stp == NULL) 25921da177e4SLinus Torvalds goto out; 25931da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 25941da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2595ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2596ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 25971da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 25988beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2599ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26001da177e4SLinus Torvalds stp->st_stateowner = sop; 260113cd2184SNeilBrown get_nfs4_file(fp); 26021da177e4SLinus Torvalds stp->st_file = fp; 26031da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26041da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26051da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26061da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26071da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26081da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26091da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26104c4cd222SNeilBrown stp->st_openstp = open_stp; 26111da177e4SLinus Torvalds 26121da177e4SLinus Torvalds out: 26131da177e4SLinus Torvalds return stp; 26141da177e4SLinus Torvalds } 26151da177e4SLinus Torvalds 2616fd39ca9aSNeilBrown static int 26171da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26181da177e4SLinus Torvalds { 26191da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26201da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26211da177e4SLinus Torvalds } 26221da177e4SLinus Torvalds 26231da177e4SLinus Torvalds /* 26241da177e4SLinus Torvalds * LOCK operation 26251da177e4SLinus Torvalds */ 26261da177e4SLinus Torvalds int 2627f2327d9aSNeil Brown nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) 26281da177e4SLinus Torvalds { 26293e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2630b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26311da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26321da177e4SLinus Torvalds struct file *filp; 26331da177e4SLinus Torvalds struct file_lock file_lock; 26348dc7c311SAndy Adamson struct file_lock conflock; 26351da177e4SLinus Torvalds int status = 0; 26361da177e4SLinus Torvalds unsigned int strhashval; 26371da177e4SLinus Torvalds 26381da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26391da177e4SLinus Torvalds (long long) lock->lk_offset, 26401da177e4SLinus Torvalds (long long) lock->lk_length); 26411da177e4SLinus Torvalds 26421da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26431da177e4SLinus Torvalds return nfserr_inval; 26441da177e4SLinus Torvalds 2645a6f6ef2fSAndy Adamson if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 2646a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2647a6f6ef2fSAndy Adamson return status; 2648a6f6ef2fSAndy Adamson } 2649a6f6ef2fSAndy Adamson 26501da177e4SLinus Torvalds nfs4_lock_state(); 26511da177e4SLinus Torvalds 26521da177e4SLinus Torvalds if (lock->lk_is_new) { 26531da177e4SLinus Torvalds /* 26541da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2655893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2656893f8770SNeilBrown * lock stateid. 26571da177e4SLinus Torvalds */ 26581da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26591da177e4SLinus Torvalds struct nfs4_file *fp; 26601da177e4SLinus Torvalds 26611da177e4SLinus Torvalds status = nfserr_stale_clientid; 2662849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26631da177e4SLinus Torvalds goto out; 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 26661da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 26671da177e4SLinus Torvalds lock->lk_new_open_seqid, 26681da177e4SLinus Torvalds &lock->lk_new_open_stateid, 26691da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 26703a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2671b59e3c0eSNeil Brown lock); 267237515177SNeilBrown if (status) 26731da177e4SLinus Torvalds goto out; 26743a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26751da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26761da177e4SLinus Torvalds fp = open_stp->st_file; 26771da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26781da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26791da177e4SLinus Torvalds &lock->v.new.owner); 26803e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26813e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26823e9e3dbeSNeilBrown * create new stateids)? */ 26831da177e4SLinus Torvalds status = nfserr_resource; 2684b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2685b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2686b59e3c0eSNeil Brown if (lock_sop == NULL) 26871da177e4SLinus Torvalds goto out; 2688b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 26898a280510SJ. Bruce Fields if (lock_stp == NULL) 26901da177e4SLinus Torvalds goto out; 26911da177e4SLinus Torvalds } else { 26921da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 26931da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 26941da177e4SLinus Torvalds lock->lk_old_lock_seqid, 26951da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 26961da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 26973a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 26981da177e4SLinus Torvalds if (status) 26991da177e4SLinus Torvalds goto out; 27003a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27011da177e4SLinus Torvalds } 27023a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27031da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27041da177e4SLinus Torvalds 27050dd395dcSNeilBrown status = nfserr_grace; 27060dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27070dd395dcSNeilBrown goto out; 27080dd395dcSNeilBrown status = nfserr_no_grace; 27090dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27100dd395dcSNeilBrown goto out; 27110dd395dcSNeilBrown 27121da177e4SLinus Torvalds locks_init_lock(&file_lock); 27131da177e4SLinus Torvalds switch (lock->lk_type) { 27141da177e4SLinus Torvalds case NFS4_READ_LT: 27151da177e4SLinus Torvalds case NFS4_READW_LT: 27161da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 27171da177e4SLinus Torvalds break; 27181da177e4SLinus Torvalds case NFS4_WRITE_LT: 27191da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27201da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 27211da177e4SLinus Torvalds break; 27221da177e4SLinus Torvalds default: 27231da177e4SLinus Torvalds status = nfserr_inval; 27241da177e4SLinus Torvalds goto out; 27251da177e4SLinus Torvalds } 2726b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27271da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27281da177e4SLinus Torvalds file_lock.fl_file = filp; 27291da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2730d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27311da177e4SLinus Torvalds 27321da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27331da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27341da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27351da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27361da177e4SLinus Torvalds else 27371da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27381da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27391da177e4SLinus Torvalds 27401da177e4SLinus Torvalds /* 27411da177e4SLinus Torvalds * Try to lock the file in the VFS. 27421da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27431da177e4SLinus Torvalds */ 27441da177e4SLinus Torvalds 2745eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2746eb76b3fdSAndy Adamson * locks_copy_lock: */ 2747eb76b3fdSAndy Adamson conflock.fl_ops = NULL; 2748eb76b3fdSAndy Adamson conflock.fl_lmops = NULL; 2749eb76b3fdSAndy Adamson status = posix_lock_file_conf(filp, &file_lock, &conflock); 2750eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); 27511da177e4SLinus Torvalds switch (-status) { 27521da177e4SLinus Torvalds case 0: /* success! */ 27531da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27541da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27551da177e4SLinus Torvalds sizeof(stateid_t)); 2756eb76b3fdSAndy Adamson break; 2757eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2758eb76b3fdSAndy Adamson status = nfserr_denied; 2759eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2760eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2761eb76b3fdSAndy Adamson break; 27621da177e4SLinus Torvalds case (EDEADLK): 27631da177e4SLinus Torvalds status = nfserr_deadlock; 2764eb76b3fdSAndy Adamson break; 27651da177e4SLinus Torvalds default: 2766eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status); 2767eb76b3fdSAndy Adamson status = nfserr_resource; 2768eb76b3fdSAndy Adamson break; 27691da177e4SLinus Torvalds } 27701da177e4SLinus Torvalds out: 27718a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27728a280510SJ. Bruce Fields release_stateowner(lock_sop); 27733a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27743a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 27753a65588aSJ. Bruce Fields *replay_owner = lock->lk_replay_owner; 2776f2327d9aSNeil Brown } 27771da177e4SLinus Torvalds nfs4_unlock_state(); 27781da177e4SLinus Torvalds return status; 27791da177e4SLinus Torvalds } 27801da177e4SLinus Torvalds 27811da177e4SLinus Torvalds /* 27821da177e4SLinus Torvalds * LOCKT operation 27831da177e4SLinus Torvalds */ 27841da177e4SLinus Torvalds int 27851da177e4SLinus Torvalds nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 27861da177e4SLinus Torvalds { 27871da177e4SLinus Torvalds struct inode *inode; 27881da177e4SLinus Torvalds struct file file; 27891da177e4SLinus Torvalds struct file_lock file_lock; 27908dc7c311SAndy Adamson struct file_lock conflock; 27911da177e4SLinus Torvalds int status; 27921da177e4SLinus Torvalds 27931da177e4SLinus Torvalds if (nfs4_in_grace()) 27941da177e4SLinus Torvalds return nfserr_grace; 27951da177e4SLinus Torvalds 27961da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 27971da177e4SLinus Torvalds return nfserr_inval; 27981da177e4SLinus Torvalds 27991da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28001da177e4SLinus Torvalds nfs4_lock_state(); 28011da177e4SLinus Torvalds 28021da177e4SLinus Torvalds status = nfserr_stale_clientid; 2803849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28041da177e4SLinus Torvalds goto out; 28051da177e4SLinus Torvalds 28061da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 2807849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28081da177e4SLinus Torvalds if (status == nfserr_symlink) 28091da177e4SLinus Torvalds status = nfserr_inval; 28101da177e4SLinus Torvalds goto out; 28111da177e4SLinus Torvalds } 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds inode = current_fh->fh_dentry->d_inode; 28141da177e4SLinus Torvalds locks_init_lock(&file_lock); 28151da177e4SLinus Torvalds switch (lockt->lt_type) { 28161da177e4SLinus Torvalds case NFS4_READ_LT: 28171da177e4SLinus Torvalds case NFS4_READW_LT: 28181da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28191da177e4SLinus Torvalds break; 28201da177e4SLinus Torvalds case NFS4_WRITE_LT: 28211da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28221da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28231da177e4SLinus Torvalds break; 28241da177e4SLinus Torvalds default: 28251da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28261da177e4SLinus Torvalds status = nfserr_inval; 28271da177e4SLinus Torvalds goto out; 28281da177e4SLinus Torvalds } 28291da177e4SLinus Torvalds 28301da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28311da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28321da177e4SLinus Torvalds if (lockt->lt_stateowner) 28331da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28341da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28351da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2836d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28371da177e4SLinus Torvalds 28381da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28391da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28401da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28411da177e4SLinus Torvalds else 28421da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28431da177e4SLinus Torvalds 28441da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28451da177e4SLinus Torvalds 28461da177e4SLinus Torvalds /* posix_test_lock uses the struct file _only_ to resolve the inode. 28471da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 28481da177e4SLinus Torvalds * file may not exist, pass posix_test_lock a struct file with 28491da177e4SLinus Torvalds * only the dentry:inode set. 28501da177e4SLinus Torvalds */ 28511da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 28521da177e4SLinus Torvalds file.f_dentry = current_fh->fh_dentry; 28531da177e4SLinus Torvalds 28541da177e4SLinus Torvalds status = nfs_ok; 28558dc7c311SAndy Adamson if (posix_test_lock(&file, &file_lock, &conflock)) { 28561da177e4SLinus Torvalds status = nfserr_denied; 28578dc7c311SAndy Adamson nfs4_set_lock_denied(&conflock, &lockt->lt_denied); 28581da177e4SLinus Torvalds } 28591da177e4SLinus Torvalds out: 28601da177e4SLinus Torvalds nfs4_unlock_state(); 28611da177e4SLinus Torvalds return status; 28621da177e4SLinus Torvalds } 28631da177e4SLinus Torvalds 28641da177e4SLinus Torvalds int 2865f2327d9aSNeil Brown nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) 28661da177e4SLinus Torvalds { 28671da177e4SLinus Torvalds struct nfs4_stateid *stp; 28681da177e4SLinus Torvalds struct file *filp = NULL; 28691da177e4SLinus Torvalds struct file_lock file_lock; 28701da177e4SLinus Torvalds int status; 28711da177e4SLinus Torvalds 28721da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28731da177e4SLinus Torvalds (long long) locku->lu_offset, 28741da177e4SLinus Torvalds (long long) locku->lu_length); 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28771da177e4SLinus Torvalds return nfserr_inval; 28781da177e4SLinus Torvalds 28791da177e4SLinus Torvalds nfs4_lock_state(); 28801da177e4SLinus Torvalds 28811da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, 28821da177e4SLinus Torvalds locku->lu_seqid, 28831da177e4SLinus Torvalds &locku->lu_stateid, 28841da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 28851da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 28861da177e4SLinus Torvalds goto out; 28871da177e4SLinus Torvalds 28881da177e4SLinus Torvalds filp = stp->st_vfs_file; 28891da177e4SLinus Torvalds BUG_ON(!filp); 28901da177e4SLinus Torvalds locks_init_lock(&file_lock); 28911da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 28921da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 28931da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28941da177e4SLinus Torvalds file_lock.fl_file = filp; 28951da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2896d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28971da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 28981da177e4SLinus Torvalds 28991da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29001da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29011da177e4SLinus Torvalds else 29021da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29031da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29041da177e4SLinus Torvalds 29051da177e4SLinus Torvalds /* 29061da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29071da177e4SLinus Torvalds */ 29081da177e4SLinus Torvalds status = posix_lock_file(filp, &file_lock); 29091da177e4SLinus Torvalds if (status) { 2910849823c5SNeil Brown dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 29111da177e4SLinus Torvalds goto out_nfserr; 29121da177e4SLinus Torvalds } 29131da177e4SLinus Torvalds /* 29141da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29151da177e4SLinus Torvalds */ 29161da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29171da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29181da177e4SLinus Torvalds 29191da177e4SLinus Torvalds out: 2920f2327d9aSNeil Brown if (locku->lu_stateowner) { 29211da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2922f2327d9aSNeil Brown *replay_owner = locku->lu_stateowner; 2923f2327d9aSNeil Brown } 29241da177e4SLinus Torvalds nfs4_unlock_state(); 29251da177e4SLinus Torvalds return status; 29261da177e4SLinus Torvalds 29271da177e4SLinus Torvalds out_nfserr: 29281da177e4SLinus Torvalds status = nfserrno(status); 29291da177e4SLinus Torvalds goto out; 29301da177e4SLinus Torvalds } 29311da177e4SLinus Torvalds 29321da177e4SLinus Torvalds /* 29331da177e4SLinus Torvalds * returns 29341da177e4SLinus Torvalds * 1: locks held by lockowner 29351da177e4SLinus Torvalds * 0: no locks held by lockowner 29361da177e4SLinus Torvalds */ 29371da177e4SLinus Torvalds static int 29381da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29391da177e4SLinus Torvalds { 29401da177e4SLinus Torvalds struct file_lock **flpp; 29411da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 29421da177e4SLinus Torvalds int status = 0; 29431da177e4SLinus Torvalds 29441da177e4SLinus Torvalds lock_kernel(); 29451da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2946796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29471da177e4SLinus Torvalds status = 1; 29481da177e4SLinus Torvalds goto out; 29491da177e4SLinus Torvalds } 2950796dadfdSJ. Bruce Fields } 29511da177e4SLinus Torvalds out: 29521da177e4SLinus Torvalds unlock_kernel(); 29531da177e4SLinus Torvalds return status; 29541da177e4SLinus Torvalds } 29551da177e4SLinus Torvalds 29561da177e4SLinus Torvalds int 29571da177e4SLinus Torvalds nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 29581da177e4SLinus Torvalds { 29591da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29603e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29613e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29621da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29633e9e3dbeSNeilBrown struct list_head matches; 29643e9e3dbeSNeilBrown int i; 29651da177e4SLinus Torvalds int status; 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29681da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29691da177e4SLinus Torvalds 29701da177e4SLinus Torvalds /* XXX check for lease expiration */ 29711da177e4SLinus Torvalds 29721da177e4SLinus Torvalds status = nfserr_stale_clientid; 2973849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29741da177e4SLinus Torvalds return status; 29751da177e4SLinus Torvalds 29761da177e4SLinus Torvalds nfs4_lock_state(); 29771da177e4SLinus Torvalds 29781da177e4SLinus Torvalds status = nfserr_locks_held; 29793e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29803e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29813e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29823e9e3dbeSNeilBrown * data structures. */ 29833e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29843e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 29853e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 29863e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 29873e9e3dbeSNeilBrown continue; 29883e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 2989ea1da636SNeilBrown st_perstateowner) { 29903e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 29911da177e4SLinus Torvalds goto out; 29923e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 29933e9e3dbeSNeilBrown * so it's OK to fool with here. */ 29943e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 29951da177e4SLinus Torvalds } 29963e9e3dbeSNeilBrown } 29973e9e3dbeSNeilBrown } 29983e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 29993e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30003e9e3dbeSNeilBrown * have been checked. */ 30011da177e4SLinus Torvalds status = nfs_ok; 30020fa822e4SNeilBrown while (!list_empty(&matches)) { 30030fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30040fa822e4SNeilBrown so_perclient); 30050fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30060fa822e4SNeilBrown * for openowners. */ 30070fa822e4SNeilBrown list_del(&sop->so_perclient); 30083e9e3dbeSNeilBrown release_stateowner(sop); 30091da177e4SLinus Torvalds } 30101da177e4SLinus Torvalds out: 30111da177e4SLinus Torvalds nfs4_unlock_state(); 30121da177e4SLinus Torvalds return status; 30131da177e4SLinus Torvalds } 30141da177e4SLinus Torvalds 30151da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3016a55370a3SNeilBrown alloc_reclaim(void) 30171da177e4SLinus Torvalds { 3018a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30191da177e4SLinus Torvalds } 30201da177e4SLinus Torvalds 3021c7b9a459SNeilBrown int 3022c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3023c7b9a459SNeilBrown { 3024c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3025c7b9a459SNeilBrown struct nfs4_client *clp; 3026c7b9a459SNeilBrown 3027c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3028c7b9a459SNeilBrown return clp ? 1 : 0; 3029c7b9a459SNeilBrown } 3030c7b9a459SNeilBrown 30311da177e4SLinus Torvalds /* 30321da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30331da177e4SLinus Torvalds */ 3034190e4fbfSNeilBrown int 3035190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30361da177e4SLinus Torvalds { 30371da177e4SLinus Torvalds unsigned int strhashval; 30381da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30391da177e4SLinus Torvalds 3040a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3041a55370a3SNeilBrown crp = alloc_reclaim(); 30421da177e4SLinus Torvalds if (!crp) 30431da177e4SLinus Torvalds return 0; 3044a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30451da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30461da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3047a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30481da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30491da177e4SLinus Torvalds return 1; 30501da177e4SLinus Torvalds } 30511da177e4SLinus Torvalds 30521da177e4SLinus Torvalds static void 30531da177e4SLinus Torvalds nfs4_release_reclaim(void) 30541da177e4SLinus Torvalds { 30551da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30561da177e4SLinus Torvalds int i; 30571da177e4SLinus Torvalds 30581da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30591da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30601da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30611da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30621da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30631da177e4SLinus Torvalds kfree(crp); 30641da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30651da177e4SLinus Torvalds } 30661da177e4SLinus Torvalds } 30671da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30681da177e4SLinus Torvalds } 30691da177e4SLinus Torvalds 30701da177e4SLinus Torvalds /* 30711da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3072fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30731da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30741da177e4SLinus Torvalds { 30751da177e4SLinus Torvalds unsigned int strhashval; 30761da177e4SLinus Torvalds struct nfs4_client *clp; 30771da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30781da177e4SLinus Torvalds 30791da177e4SLinus Torvalds 30801da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30811da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30821da177e4SLinus Torvalds if (clp == NULL) 30831da177e4SLinus Torvalds return NULL; 30841da177e4SLinus Torvalds 3085a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3086a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3087a55370a3SNeilBrown clp->cl_recdir); 30881da177e4SLinus Torvalds 30891da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3090a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 30911da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3092a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 30931da177e4SLinus Torvalds return crp; 30941da177e4SLinus Torvalds } 30951da177e4SLinus Torvalds } 30961da177e4SLinus Torvalds return NULL; 30971da177e4SLinus Torvalds } 30981da177e4SLinus Torvalds 30991da177e4SLinus Torvalds /* 31001da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31011da177e4SLinus Torvalds */ 31021da177e4SLinus Torvalds int 31031da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31041da177e4SLinus Torvalds { 3105dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31061da177e4SLinus Torvalds } 31071da177e4SLinus Torvalds 3108ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31091da177e4SLinus Torvalds 3110ac4d8ff2SNeilBrown void 3111ac4d8ff2SNeilBrown nfs4_state_init(void) 31121da177e4SLinus Torvalds { 31131da177e4SLinus Torvalds int i; 31141da177e4SLinus Torvalds 31151da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31161da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31171da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31181da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31191da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31201da177e4SLinus Torvalds } 31211da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31221da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31231da177e4SLinus Torvalds } 31241da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31251da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31261da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31271da177e4SLinus Torvalds } 31281da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31291da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31301da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31311da177e4SLinus Torvalds } 31321da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31331da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31341da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31381da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31391da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3140ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3141ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3142ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3143ac4d8ff2SNeilBrown } 3144ac4d8ff2SNeilBrown 3145190e4fbfSNeilBrown static void 3146190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3147190e4fbfSNeilBrown { 3148190e4fbfSNeilBrown int status; 3149190e4fbfSNeilBrown 31500964a3d3SNeilBrown nfs4_lock_state(); 31510964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3152190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31530964a3d3SNeilBrown nfs4_unlock_state(); 3154190e4fbfSNeilBrown if (status) 3155190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3156190e4fbfSNeilBrown } 3157190e4fbfSNeilBrown 3158ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3159ac4d8ff2SNeilBrown 3160ac4d8ff2SNeilBrown static void 3161ac4d8ff2SNeilBrown __nfs4_state_start(void) 3162ac4d8ff2SNeilBrown { 3163ac4d8ff2SNeilBrown time_t grace_time; 3164ac4d8ff2SNeilBrown 31651da177e4SLinus Torvalds boot_time = get_seconds(); 3166d99a05adSNeilBrown grace_time = max(user_lease_time, lease_time); 3167d99a05adSNeilBrown lease_time = user_lease_time; 3168a76b4319SNeilBrown in_grace = 1; 31691da177e4SLinus Torvalds printk("NFSD: starting %ld-second grace period\n", grace_time); 317058da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 3171a76b4319SNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); 31721da177e4SLinus Torvalds } 31731da177e4SLinus Torvalds 31741da177e4SLinus Torvalds int 317576a3550eSNeilBrown nfs4_state_start(void) 31761da177e4SLinus Torvalds { 31771da177e4SLinus Torvalds int status; 31781da177e4SLinus Torvalds 31791da177e4SLinus Torvalds if (nfs4_init) 31801da177e4SLinus Torvalds return 0; 31811da177e4SLinus Torvalds status = nfsd4_init_slabs(); 31821da177e4SLinus Torvalds if (status) 31831da177e4SLinus Torvalds return status; 3184190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 318576a3550eSNeilBrown __nfs4_state_start(); 31861da177e4SLinus Torvalds nfs4_init = 1; 31871da177e4SLinus Torvalds return 0; 31881da177e4SLinus Torvalds } 31891da177e4SLinus Torvalds 31901da177e4SLinus Torvalds int 31911da177e4SLinus Torvalds nfs4_in_grace(void) 31921da177e4SLinus Torvalds { 3193a76b4319SNeilBrown return in_grace; 31941da177e4SLinus Torvalds } 31951da177e4SLinus Torvalds 31961da177e4SLinus Torvalds time_t 31971da177e4SLinus Torvalds nfs4_lease_time(void) 31981da177e4SLinus Torvalds { 31991da177e4SLinus Torvalds return lease_time; 32001da177e4SLinus Torvalds } 32011da177e4SLinus Torvalds 32021da177e4SLinus Torvalds static void 32031da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32041da177e4SLinus Torvalds { 32051da177e4SLinus Torvalds int i; 32061da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32071da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32081da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 32091da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32101da177e4SLinus Torvalds 32111da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 32121da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 32131da177e4SLinus Torvalds list_del(&sop->so_close_lru); 32141da177e4SLinus Torvalds nfs4_put_stateowner(sop); 32151da177e4SLinus Torvalds } 32161da177e4SLinus Torvalds 32171da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32181da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32191da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32201da177e4SLinus Torvalds expire_client(clp); 32211da177e4SLinus Torvalds } 32221da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32231da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32241da177e4SLinus Torvalds expire_client(clp); 32251da177e4SLinus Torvalds } 32261da177e4SLinus Torvalds } 32271da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32281da177e4SLinus Torvalds spin_lock(&recall_lock); 32291da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32301da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32311da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds spin_unlock(&recall_lock); 32341da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32351da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32361da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32371da177e4SLinus Torvalds unhash_delegation(dp); 32381da177e4SLinus Torvalds } 32391da177e4SLinus Torvalds 32401da177e4SLinus Torvalds cancel_delayed_work(&laundromat_work); 324158da282bSNeilBrown flush_workqueue(laundry_wq); 324258da282bSNeilBrown destroy_workqueue(laundry_wq); 3243190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32441da177e4SLinus Torvalds nfs4_init = 0; 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds 32471da177e4SLinus Torvalds void 32481da177e4SLinus Torvalds nfs4_state_shutdown(void) 32491da177e4SLinus Torvalds { 32501da177e4SLinus Torvalds nfs4_lock_state(); 32511da177e4SLinus Torvalds nfs4_release_reclaim(); 32521da177e4SLinus Torvalds __nfs4_state_shutdown(); 32531da177e4SLinus Torvalds nfsd4_free_slabs(); 32541da177e4SLinus Torvalds nfs4_unlock_state(); 32551da177e4SLinus Torvalds } 32561da177e4SLinus Torvalds 32570964a3d3SNeilBrown static void 32580964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32590964a3d3SNeilBrown { 32600964a3d3SNeilBrown nfs4_lock_state(); 32610964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32620964a3d3SNeilBrown nfs4_unlock_state(); 32630964a3d3SNeilBrown } 32640964a3d3SNeilBrown 32650964a3d3SNeilBrown /* 32660964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32670964a3d3SNeilBrown */ 32680964a3d3SNeilBrown int 32690964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32700964a3d3SNeilBrown { 32710964a3d3SNeilBrown int status; 32720964a3d3SNeilBrown struct nameidata nd; 32730964a3d3SNeilBrown 32740964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 32750964a3d3SNeilBrown if (status) 32760964a3d3SNeilBrown return status; 32770964a3d3SNeilBrown status = -ENOTDIR; 32780964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 32790964a3d3SNeilBrown nfs4_set_recdir(recdir); 32800964a3d3SNeilBrown status = 0; 32810964a3d3SNeilBrown } 32820964a3d3SNeilBrown path_release(&nd); 32830964a3d3SNeilBrown return status; 32840964a3d3SNeilBrown } 32850964a3d3SNeilBrown 32861da177e4SLinus Torvalds /* 32871da177e4SLinus Torvalds * Called when leasetime is changed. 32881da177e4SLinus Torvalds * 3289d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3290d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3291d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3292d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3293d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 32941da177e4SLinus Torvalds */ 32951da177e4SLinus Torvalds void 32961da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 32971da177e4SLinus Torvalds { 3298d99a05adSNeilBrown lock_kernel(); 3299d99a05adSNeilBrown user_lease_time = leasetime; 3300d99a05adSNeilBrown unlock_kernel(); 33011da177e4SLinus Torvalds } 3302