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 3334e2fd495SNeilBrown shutdown_callback_client(struct nfs4_client *clp) 3344e2fd495SNeilBrown { 3354e2fd495SNeilBrown struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3364e2fd495SNeilBrown 3374e2fd495SNeilBrown /* shutdown rpc client, ending any outstanding recall rpcs */ 3384e2fd495SNeilBrown if (clnt) { 3394e2fd495SNeilBrown clp->cl_callback.cb_client = NULL; 3404e2fd495SNeilBrown rpc_shutdown_client(clnt); 3414e2fd495SNeilBrown rpciod_down(); 3424e2fd495SNeilBrown } 3434e2fd495SNeilBrown } 3444e2fd495SNeilBrown 3454e2fd495SNeilBrown static void 3461da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3471da177e4SLinus Torvalds { 3481da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3491da177e4SLinus Torvalds struct nfs4_delegation *dp; 3501da177e4SLinus Torvalds struct list_head reaplist; 3511da177e4SLinus Torvalds 3521da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3531da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3541da177e4SLinus Torvalds 3554e2fd495SNeilBrown shutdown_callback_client(clp); 3561da177e4SLinus Torvalds 3571da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 3581da177e4SLinus Torvalds spin_lock(&recall_lock); 359ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 360ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 3611da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 3621da177e4SLinus Torvalds dp->dl_flock); 363ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3641da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 3651da177e4SLinus Torvalds } 3661da177e4SLinus Torvalds spin_unlock(&recall_lock); 3671da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 3681da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 3691da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3701da177e4SLinus Torvalds unhash_delegation(dp); 3711da177e4SLinus Torvalds } 3721da177e4SLinus Torvalds list_del(&clp->cl_idhash); 3731da177e4SLinus Torvalds list_del(&clp->cl_strhash); 3741da177e4SLinus Torvalds list_del(&clp->cl_lru); 375ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 376ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 3771da177e4SLinus Torvalds release_stateowner(sop); 3781da177e4SLinus Torvalds } 3791da177e4SLinus Torvalds put_nfs4_client(clp); 3801da177e4SLinus Torvalds } 3811da177e4SLinus Torvalds 3821da177e4SLinus Torvalds static struct nfs4_client * 383a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 3841da177e4SLinus Torvalds struct nfs4_client *clp; 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 3871da177e4SLinus Torvalds goto out; 388a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 3891da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 3901da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 3911da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 3921da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 393ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 394ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 3951da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 3961da177e4SLinus Torvalds out: 3971da177e4SLinus Torvalds return clp; 3981da177e4SLinus Torvalds } 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds static void 4011da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 4021da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 4031da177e4SLinus Torvalds } 4041da177e4SLinus Torvalds 4051da177e4SLinus Torvalds static void 4061da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 4071da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4081da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4091da177e4SLinus Torvalds } 4101da177e4SLinus Torvalds 4111da177e4SLinus Torvalds static void 4121da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4131da177e4SLinus Torvalds 4141da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4151da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4161da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4171da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4181da177e4SLinus Torvalds } 4191da177e4SLinus Torvalds 420a55370a3SNeilBrown static inline int 421a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 422a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4231da177e4SLinus Torvalds } 4241da177e4SLinus Torvalds 4251da177e4SLinus Torvalds static int 4261da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4271da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4281da177e4SLinus Torvalds } 4291da177e4SLinus Torvalds 4301da177e4SLinus Torvalds static int 4311da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4321da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4331da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4341da177e4SLinus Torvalds } 4351da177e4SLinus Torvalds 4361da177e4SLinus Torvalds /* XXX what about NGROUP */ 4371da177e4SLinus Torvalds static int 4381da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4391da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds } 4421da177e4SLinus Torvalds 4431da177e4SLinus Torvalds static void 4441da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4451da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4461da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4471da177e4SLinus Torvalds } 4481da177e4SLinus Torvalds 4491da177e4SLinus Torvalds static void 4501da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4511da177e4SLinus Torvalds struct timespec tv; 4521da177e4SLinus Torvalds u32 * p; 4531da177e4SLinus Torvalds 4541da177e4SLinus Torvalds tv = CURRENT_TIME; 4551da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 4561da177e4SLinus Torvalds *p++ = tv.tv_sec; 4571da177e4SLinus Torvalds *p++ = tv.tv_nsec; 4581da177e4SLinus Torvalds } 4591da177e4SLinus Torvalds 4601da177e4SLinus Torvalds static int 4611da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 4621da177e4SLinus Torvalds 4631da177e4SLinus Torvalds if (name.len == 0) 4641da177e4SLinus Torvalds return 0; 4651da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 4661da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 4671da177e4SLinus Torvalds return 0; 4681da177e4SLinus Torvalds } 4691da177e4SLinus Torvalds return 1; 4701da177e4SLinus Torvalds } 4711da177e4SLinus Torvalds 472fd39ca9aSNeilBrown static void 4731da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 4741da177e4SLinus Torvalds { 4751da177e4SLinus Torvalds unsigned int idhashval; 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 4781da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4791da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 4801da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 4811da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4821da177e4SLinus Torvalds } 4831da177e4SLinus Torvalds 484fd39ca9aSNeilBrown static void 4851da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 4861da177e4SLinus Torvalds { 4871da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4881da177e4SLinus Torvalds unsigned int strhashval; 4891da177e4SLinus Torvalds 4901da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 4911da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 4921da177e4SLinus Torvalds list_del_init(&clp->cl_idhash); 4931da177e4SLinus Torvalds list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 494a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 4951da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 4961da177e4SLinus Torvalds renew_client(clp); 4971da177e4SLinus Torvalds } 4981da177e4SLinus Torvalds 4991da177e4SLinus Torvalds static struct nfs4_client * 5001da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5011da177e4SLinus Torvalds { 5021da177e4SLinus Torvalds struct nfs4_client *clp; 5031da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5041da177e4SLinus Torvalds 5051da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 5061da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5071da177e4SLinus Torvalds return clp; 5081da177e4SLinus Torvalds } 5091da177e4SLinus Torvalds return NULL; 5101da177e4SLinus Torvalds } 5111da177e4SLinus Torvalds 5121da177e4SLinus Torvalds static struct nfs4_client * 5131da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5141da177e4SLinus Torvalds { 5151da177e4SLinus Torvalds struct nfs4_client *clp; 5161da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5171da177e4SLinus Torvalds 5181da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5191da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5201da177e4SLinus Torvalds return clp; 5211da177e4SLinus Torvalds } 5221da177e4SLinus Torvalds return NULL; 5231da177e4SLinus Torvalds } 5241da177e4SLinus Torvalds 52528ce6054SNeilBrown static struct nfs4_client * 52628ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 52728ce6054SNeilBrown { 52828ce6054SNeilBrown struct nfs4_client *clp; 52928ce6054SNeilBrown 53028ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 53128ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 53228ce6054SNeilBrown return clp; 53328ce6054SNeilBrown } 53428ce6054SNeilBrown return NULL; 53528ce6054SNeilBrown } 53628ce6054SNeilBrown 53728ce6054SNeilBrown static struct nfs4_client * 53828ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 53928ce6054SNeilBrown { 54028ce6054SNeilBrown struct nfs4_client *clp; 54128ce6054SNeilBrown 54228ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 54328ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 54428ce6054SNeilBrown return clp; 54528ce6054SNeilBrown } 54628ce6054SNeilBrown return NULL; 54728ce6054SNeilBrown } 54828ce6054SNeilBrown 5491da177e4SLinus Torvalds /* a helper function for parse_callback */ 5501da177e4SLinus Torvalds static int 5511da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5521da177e4SLinus Torvalds { 5531da177e4SLinus Torvalds unsigned int len = *lenp; 5541da177e4SLinus Torvalds char *p = *addrp; 5551da177e4SLinus Torvalds int n = -1; 5561da177e4SLinus Torvalds char c; 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds for (;;) { 5591da177e4SLinus Torvalds if (!len) 5601da177e4SLinus Torvalds break; 5611da177e4SLinus Torvalds len--; 5621da177e4SLinus Torvalds c = *p++; 5631da177e4SLinus Torvalds if (c == '.') 5641da177e4SLinus Torvalds break; 5651da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 5661da177e4SLinus Torvalds n = -1; 5671da177e4SLinus Torvalds break; 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds if (n < 0) 5701da177e4SLinus Torvalds n = 0; 5711da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 5721da177e4SLinus Torvalds if (n > 255) { 5731da177e4SLinus Torvalds n = -1; 5741da177e4SLinus Torvalds break; 5751da177e4SLinus Torvalds } 5761da177e4SLinus Torvalds } 5771da177e4SLinus Torvalds *lenp = len; 5781da177e4SLinus Torvalds *addrp = p; 5791da177e4SLinus Torvalds return n; 5801da177e4SLinus Torvalds } 5811da177e4SLinus Torvalds 5821da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 583fd39ca9aSNeilBrown static int 5841da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 5851da177e4SLinus Torvalds { 5861da177e4SLinus Torvalds int temp = 0; 5871da177e4SLinus Torvalds u32 cbaddr = 0; 5881da177e4SLinus Torvalds u16 cbport = 0; 5891da177e4SLinus Torvalds u32 addrlen = addr_len; 5901da177e4SLinus Torvalds char *addr = addr_val; 5911da177e4SLinus Torvalds int i, shift; 5921da177e4SLinus Torvalds 5931da177e4SLinus Torvalds /* ipaddress */ 5941da177e4SLinus Torvalds shift = 24; 5951da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 5961da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 5971da177e4SLinus Torvalds return 0; 5981da177e4SLinus Torvalds } 5991da177e4SLinus Torvalds cbaddr |= (temp << shift); 6001da177e4SLinus Torvalds if (shift > 0) 6011da177e4SLinus Torvalds shift -= 8; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds *cbaddrp = cbaddr; 6041da177e4SLinus Torvalds 6051da177e4SLinus Torvalds /* port */ 6061da177e4SLinus Torvalds shift = 8; 6071da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6081da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6091da177e4SLinus Torvalds return 0; 6101da177e4SLinus Torvalds } 6111da177e4SLinus Torvalds cbport |= (temp << shift); 6121da177e4SLinus Torvalds if (shift > 0) 6131da177e4SLinus Torvalds shift -= 8; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds *cbportp = cbport; 6161da177e4SLinus Torvalds return 1; 6171da177e4SLinus Torvalds } 6181da177e4SLinus Torvalds 619fd39ca9aSNeilBrown static void 6201da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6211da177e4SLinus Torvalds { 6221da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6231da177e4SLinus Torvalds 6241da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6251da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6261da177e4SLinus Torvalds goto out_err; 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6291da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6301da177e4SLinus Torvalds goto out_err; 6311da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6321da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6331da177e4SLinus Torvalds return; 6341da177e4SLinus Torvalds out_err: 635849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6361da177e4SLinus Torvalds "will not receive delegations\n", 6371da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds return; 6401da177e4SLinus Torvalds } 6411da177e4SLinus Torvalds 6421da177e4SLinus Torvalds /* 6431da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6441da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6451da177e4SLinus Torvalds * CASE0 - CASE4 below. 6461da177e4SLinus Torvalds * 6471da177e4SLinus Torvalds * NOTES: 6481da177e4SLinus Torvalds * callback information will be processed in a future patch 6491da177e4SLinus Torvalds * 6501da177e4SLinus Torvalds * an unconfirmed record is added when: 6511da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6521da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6531da177e4SLinus Torvalds * verifier, and clientid. 6541da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6551da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6561da177e4SLinus Torvalds * name and principal 6571da177e4SLinus Torvalds * 6581da177e4SLinus Torvalds * an unconfirmed record is replaced when: 6591da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 6601da177e4SLinus Torvalds * and an unconfirmed record is found with matching 6611da177e4SLinus Torvalds * name, principal, and with clientid and 6621da177e4SLinus Torvalds * confirm that does not match the confirmed record. 6631da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 6641da177e4SLinus Torvalds * principal. there is an unconfirmed record with 6651da177e4SLinus Torvalds * matching name, principal. 6661da177e4SLinus Torvalds * 6671da177e4SLinus Torvalds * an unconfirmed record is deleted when: 6681da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 6691da177e4SLinus Torvalds * and confirmed clientid. 6701da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 6711da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 6721da177e4SLinus Torvalds * as described above. 6731da177e4SLinus Torvalds * 6741da177e4SLinus Torvalds */ 6751da177e4SLinus Torvalds int 6761da177e4SLinus Torvalds nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 6771da177e4SLinus Torvalds { 6781da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 6791da177e4SLinus Torvalds struct xdr_netobj clname = { 6801da177e4SLinus Torvalds .len = setclid->se_namelen, 6811da177e4SLinus Torvalds .data = setclid->se_name, 6821da177e4SLinus Torvalds }; 6831da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 6841da177e4SLinus Torvalds unsigned int strhashval; 68528ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 6861da177e4SLinus Torvalds int status; 687a55370a3SNeilBrown char dname[HEXDIR_LEN]; 6881da177e4SLinus Torvalds 6891da177e4SLinus Torvalds if (!check_name(clname)) 69073aea4ecSNeil Brown return nfserr_inval; 6911da177e4SLinus Torvalds 692a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 693a55370a3SNeilBrown if (status) 69473aea4ecSNeil Brown return status; 695a55370a3SNeilBrown 6961da177e4SLinus Torvalds /* 6971da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 6981da177e4SLinus Torvalds * We get here on a DRC miss. 6991da177e4SLinus Torvalds */ 7001da177e4SLinus Torvalds 701a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7021da177e4SLinus Torvalds 7031da177e4SLinus Torvalds nfs4_lock_state(); 70428ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 70528ce6054SNeilBrown if (conf) { 7061da177e4SLinus Torvalds /* 7071da177e4SLinus Torvalds * CASE 0: 7081da177e4SLinus Torvalds * clname match, confirmed, different principal 7091da177e4SLinus Torvalds * or different ip_address 7101da177e4SLinus Torvalds */ 7111da177e4SLinus Torvalds status = nfserr_clid_inuse; 71228ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 71328ce6054SNeilBrown || conf->cl_addr != ip_addr) { 7141da177e4SLinus Torvalds printk("NFSD: setclientid: string in use by client" 7151da177e4SLinus Torvalds "(clientid %08x/%08x)\n", 71628ce6054SNeilBrown conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); 7171da177e4SLinus Torvalds goto out; 7181da177e4SLinus Torvalds } 7191da177e4SLinus Torvalds } 72028ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7211da177e4SLinus Torvalds status = nfserr_resource; 7221da177e4SLinus Torvalds if (!conf) { 7231da177e4SLinus Torvalds /* 7241da177e4SLinus Torvalds * CASE 4: 7251da177e4SLinus Torvalds * placed first, because it is the normal case. 7261da177e4SLinus Torvalds */ 7271da177e4SLinus Torvalds if (unconf) 7281da177e4SLinus Torvalds expire_client(unconf); 729a55370a3SNeilBrown new = create_client(clname, dname); 730a55370a3SNeilBrown if (new == NULL) 7311da177e4SLinus Torvalds goto out; 7321da177e4SLinus Torvalds copy_verf(new, &clverifier); 7331da177e4SLinus Torvalds new->cl_addr = ip_addr; 7341da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7351da177e4SLinus Torvalds gen_clid(new); 7361da177e4SLinus Torvalds gen_confirm(new); 7371da177e4SLinus Torvalds gen_callback(new, setclid); 7381da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7391da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7401da177e4SLinus Torvalds /* 7411da177e4SLinus Torvalds * CASE 1: 7421da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7431da177e4SLinus Torvalds * verifier match: probable callback update 7441da177e4SLinus Torvalds * 7451da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7461da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7471da177e4SLinus Torvalds * 7481da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7491da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7501da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7511da177e4SLinus Torvalds * new cl_confirm 7521da177e4SLinus Torvalds */ 75331f4a6c1SNeilBrown if (unconf) { 75431f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 75531f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 75631f4a6c1SNeilBrown * This has the advantage that there is at most 75731f4a6c1SNeilBrown * one {*x***} in either list at any time. 75831f4a6c1SNeilBrown */ 7591da177e4SLinus Torvalds expire_client(unconf); 7601da177e4SLinus Torvalds } 761a55370a3SNeilBrown new = create_client(clname, dname); 762a55370a3SNeilBrown if (new == NULL) 7631da177e4SLinus Torvalds goto out; 7641da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 7651da177e4SLinus Torvalds new->cl_addr = ip_addr; 7661da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7671da177e4SLinus Torvalds copy_clid(new, conf); 7681da177e4SLinus Torvalds gen_confirm(new); 7691da177e4SLinus Torvalds gen_callback(new, setclid); 7701da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 7711da177e4SLinus Torvalds } else if (!unconf) { 7721da177e4SLinus Torvalds /* 7731da177e4SLinus Torvalds * CASE 2: 7741da177e4SLinus Torvalds * clname match, confirmed, principal match 7751da177e4SLinus Torvalds * verfier does not match 7761da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 7771da177e4SLinus Torvalds * using input clverifier, clname, and callback info 7781da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 7791da177e4SLinus Torvalds */ 780a55370a3SNeilBrown new = create_client(clname, dname); 781a55370a3SNeilBrown if (new == NULL) 7821da177e4SLinus Torvalds goto out; 7831da177e4SLinus Torvalds copy_verf(new,&clverifier); 7841da177e4SLinus Torvalds new->cl_addr = ip_addr; 7851da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7861da177e4SLinus Torvalds gen_clid(new); 7871da177e4SLinus Torvalds gen_confirm(new); 7881da177e4SLinus Torvalds gen_callback(new, setclid); 7891da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7901da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 7911da177e4SLinus Torvalds /* 7921da177e4SLinus Torvalds * CASE3: 7931da177e4SLinus Torvalds * confirmed found (name, principal match) 7941da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 7951da177e4SLinus Torvalds * 7961da177e4SLinus Torvalds * unconfirmed found (name match) 7971da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 7981da177e4SLinus Torvalds * 7991da177e4SLinus Torvalds * remove unconfirmed. 8001da177e4SLinus Torvalds * 8011da177e4SLinus Torvalds * create an unconfirmed nfs4_client 8021da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 8031da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 8041da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 8051da177e4SLinus Torvalds */ 8061da177e4SLinus Torvalds expire_client(unconf); 807a55370a3SNeilBrown new = create_client(clname, dname); 808a55370a3SNeilBrown if (new == NULL) 8091da177e4SLinus Torvalds goto out; 8101da177e4SLinus Torvalds copy_verf(new,&clverifier); 8111da177e4SLinus Torvalds new->cl_addr = ip_addr; 8121da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8131da177e4SLinus Torvalds gen_clid(new); 8141da177e4SLinus Torvalds gen_confirm(new); 8151da177e4SLinus Torvalds gen_callback(new, setclid); 8161da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8171da177e4SLinus Torvalds } else { 8181da177e4SLinus Torvalds /* No cases hit !!! */ 8191da177e4SLinus Torvalds status = nfserr_inval; 8201da177e4SLinus Torvalds goto out; 8211da177e4SLinus Torvalds 8221da177e4SLinus Torvalds } 8231da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8241da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8251da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8261da177e4SLinus Torvalds status = nfs_ok; 8271da177e4SLinus Torvalds out: 8281da177e4SLinus Torvalds nfs4_unlock_state(); 8291da177e4SLinus Torvalds return status; 8301da177e4SLinus Torvalds } 8311da177e4SLinus Torvalds 8321da177e4SLinus Torvalds 8331da177e4SLinus Torvalds /* 8341da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8351da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8361da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8371da177e4SLinus Torvalds * 8381da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8391da177e4SLinus Torvalds */ 8401da177e4SLinus Torvalds int 8411da177e4SLinus Torvalds nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 8421da177e4SLinus Torvalds { 8431da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 84421ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8451da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8461da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 8471da177e4SLinus Torvalds int status; 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8501da177e4SLinus Torvalds return nfserr_stale_clientid; 8511da177e4SLinus Torvalds /* 8521da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8531da177e4SLinus Torvalds * We get here on a DRC miss. 8541da177e4SLinus Torvalds */ 8551da177e4SLinus Torvalds 8561da177e4SLinus Torvalds nfs4_lock_state(); 85721ab45a4SNeilBrown 85821ab45a4SNeilBrown conf = find_confirmed_client(clid); 85921ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 86021ab45a4SNeilBrown 86122de4d83SNeilBrown status = nfserr_clid_inuse; 86221ab45a4SNeilBrown if (conf && conf->cl_addr != ip_addr) 8631da177e4SLinus Torvalds goto out; 86421ab45a4SNeilBrown if (unconf && unconf->cl_addr != ip_addr) 8651da177e4SLinus Torvalds goto out; 86621ab45a4SNeilBrown 8671da177e4SLinus Torvalds if ((conf && unconf) && 8681da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 8691da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 870a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 8711da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 8727c79f737SNeilBrown /* CASE 1: 8737c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 8747c79f737SNeilBrown * conf record that matches input clientid. 8757c79f737SNeilBrown * conf and unconf records match names, verifiers 8767c79f737SNeilBrown */ 8771da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 8781da177e4SLinus Torvalds status = nfserr_clid_inuse; 8791da177e4SLinus Torvalds else { 8801a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 8811a69c179SNeilBrown * change request correctly. */ 882cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 88321ab45a4SNeilBrown gen_confirm(conf); 88446309029SNeilBrown nfsd4_remove_clid_dir(unconf); 8851a69c179SNeilBrown expire_client(unconf); 8861da177e4SLinus Torvalds status = nfs_ok; 8871a69c179SNeilBrown 8881da177e4SLinus Torvalds } 8897c79f737SNeilBrown } else if ((conf && !unconf) || 8901da177e4SLinus Torvalds ((conf && unconf) && 8911da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 892a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 8937c79f737SNeilBrown /* CASE 2: 8947c79f737SNeilBrown * conf record that matches input clientid. 8957c79f737SNeilBrown * if unconf record matches input clientid, then 8967c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 8977c79f737SNeilBrown * conf record. 8987c79f737SNeilBrown */ 89921ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 9001da177e4SLinus Torvalds status = nfserr_clid_inuse; 90121ab45a4SNeilBrown else 9021da177e4SLinus Torvalds status = nfs_ok; 9037c79f737SNeilBrown } else if (!conf && unconf 9047c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 9051da177e4SLinus Torvalds /* CASE 3: 9061da177e4SLinus Torvalds * conf record not found. 9071da177e4SLinus Torvalds * unconf record found. 9081da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9091da177e4SLinus Torvalds */ 9101da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9111da177e4SLinus Torvalds status = nfserr_clid_inuse; 9121da177e4SLinus Torvalds } else { 9131a69c179SNeilBrown unsigned int hash = 9141a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9151a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9161a69c179SNeilBrown hash); 9171a69c179SNeilBrown if (conf) { 918c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9191a69c179SNeilBrown expire_client(conf); 9201a69c179SNeilBrown } 9211da177e4SLinus Torvalds move_to_confirmed(unconf); 92221ab45a4SNeilBrown conf = unconf; 9231a69c179SNeilBrown status = nfs_ok; 9241da177e4SLinus Torvalds } 9257c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9267c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9277c79f737SNeilBrown &confirm)))) { 9281da177e4SLinus Torvalds /* CASE 4: 9297c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9301da177e4SLinus Torvalds * match input confirm. 9317c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9321da177e4SLinus Torvalds * does not match input confirm. 9331da177e4SLinus Torvalds */ 9341da177e4SLinus Torvalds status = nfserr_stale_clientid; 9357c79f737SNeilBrown } else { 9361da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 93722de4d83SNeilBrown status = nfserr_clid_inuse; 93808e8987cSNeilBrown } 9391da177e4SLinus Torvalds out: 9401da177e4SLinus Torvalds if (!status) 94121ab45a4SNeilBrown nfsd4_probe_callback(conf); 9421da177e4SLinus Torvalds nfs4_unlock_state(); 9431da177e4SLinus Torvalds return status; 9441da177e4SLinus Torvalds } 9451da177e4SLinus Torvalds 9461da177e4SLinus Torvalds /* 9471da177e4SLinus Torvalds * Open owner state (share locks) 9481da177e4SLinus Torvalds */ 9491da177e4SLinus Torvalds 9501da177e4SLinus Torvalds /* hash tables for nfs4_stateowner */ 9511da177e4SLinus Torvalds #define OWNER_HASH_BITS 8 9521da177e4SLinus Torvalds #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 9531da177e4SLinus Torvalds #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 9541da177e4SLinus Torvalds 9551da177e4SLinus Torvalds #define ownerid_hashval(id) \ 9561da177e4SLinus Torvalds ((id) & OWNER_HASH_MASK) 9571da177e4SLinus Torvalds #define ownerstr_hashval(clientid, ownername) \ 9581da177e4SLinus Torvalds (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 9591da177e4SLinus Torvalds 9601da177e4SLinus Torvalds static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 9611da177e4SLinus Torvalds static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 9621da177e4SLinus Torvalds 9631da177e4SLinus Torvalds /* hash table for nfs4_file */ 9641da177e4SLinus Torvalds #define FILE_HASH_BITS 8 9651da177e4SLinus Torvalds #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 9661da177e4SLinus Torvalds #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 9671da177e4SLinus Torvalds /* hash table for (open)nfs4_stateid */ 9681da177e4SLinus Torvalds #define STATEID_HASH_BITS 10 9691da177e4SLinus Torvalds #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 9701da177e4SLinus Torvalds #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 9711da177e4SLinus Torvalds 9721da177e4SLinus Torvalds #define file_hashval(x) \ 9731da177e4SLinus Torvalds hash_ptr(x, FILE_HASH_BITS) 9741da177e4SLinus Torvalds #define stateid_hashval(owner_id, file_id) \ 9751da177e4SLinus Torvalds (((owner_id) + (file_id)) & STATEID_HASH_MASK) 9761da177e4SLinus Torvalds 9771da177e4SLinus Torvalds static struct list_head file_hashtbl[FILE_HASH_SIZE]; 9781da177e4SLinus Torvalds static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 9791da177e4SLinus Torvalds 9801da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9811da177e4SLinus Torvalds static inline struct nfs4_file * 9821da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9831da177e4SLinus Torvalds { 9841da177e4SLinus Torvalds struct nfs4_file *fp; 9851da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9861da177e4SLinus Torvalds 987e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 988e60d4398SNeilBrown if (fp) { 98913cd2184SNeilBrown kref_init(&fp->fi_ref); 9901da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9918beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9928beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9931da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9941da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9951da177e4SLinus Torvalds fp->fi_id = current_fileid++; 9961da177e4SLinus Torvalds return fp; 9971da177e4SLinus Torvalds } 9981da177e4SLinus Torvalds return NULL; 9991da177e4SLinus Torvalds } 10001da177e4SLinus Torvalds 10011da177e4SLinus Torvalds static void 1002e60d4398SNeilBrown nfsd4_free_slab(kmem_cache_t **slab) 1003e60d4398SNeilBrown { 1004e60d4398SNeilBrown int status; 1005e60d4398SNeilBrown 1006e60d4398SNeilBrown if (*slab == NULL) 1007e60d4398SNeilBrown return; 1008e60d4398SNeilBrown status = kmem_cache_destroy(*slab); 1009e60d4398SNeilBrown *slab = NULL; 1010e60d4398SNeilBrown WARN_ON(status); 1011e60d4398SNeilBrown } 1012e60d4398SNeilBrown 1013e60d4398SNeilBrown static void 1014e60d4398SNeilBrown nfsd4_free_slabs(void) 1015e60d4398SNeilBrown { 1016e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1017e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10185ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10195b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1020e60d4398SNeilBrown } 10211da177e4SLinus Torvalds 10221da177e4SLinus Torvalds static int 10231da177e4SLinus Torvalds nfsd4_init_slabs(void) 10241da177e4SLinus Torvalds { 10251da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 10261da177e4SLinus Torvalds sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1027e60d4398SNeilBrown if (stateowner_slab == NULL) 1028e60d4398SNeilBrown goto out_nomem; 1029e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 1030e60d4398SNeilBrown sizeof(struct nfs4_file), 0, 0, NULL, NULL); 1031e60d4398SNeilBrown if (file_slab == NULL) 1032e60d4398SNeilBrown goto out_nomem; 10335ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 10345ac049acSNeilBrown sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); 10355ac049acSNeilBrown if (stateid_slab == NULL) 10365ac049acSNeilBrown goto out_nomem; 10375b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 10385b2d21c1SNeilBrown sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); 10395b2d21c1SNeilBrown if (deleg_slab == NULL) 10405b2d21c1SNeilBrown goto out_nomem; 1041e60d4398SNeilBrown return 0; 1042e60d4398SNeilBrown out_nomem: 1043e60d4398SNeilBrown nfsd4_free_slabs(); 10441da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10451da177e4SLinus Torvalds return -ENOMEM; 10461da177e4SLinus Torvalds } 10471da177e4SLinus Torvalds 10481da177e4SLinus Torvalds void 10491da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10501da177e4SLinus Torvalds { 10511da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10521da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10531da177e4SLinus Torvalds kfree(sop->so_owner.data); 10541da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10551da177e4SLinus Torvalds } 10561da177e4SLinus Torvalds 10571da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10581da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10591da177e4SLinus Torvalds { 10601da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10611da177e4SLinus Torvalds 10621da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10631da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10641da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10651da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10661da177e4SLinus Torvalds kref_init(&sop->so_ref); 10671da177e4SLinus Torvalds return sop; 10681da177e4SLinus Torvalds } 10691da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10701da177e4SLinus Torvalds } 10711da177e4SLinus Torvalds return NULL; 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds static struct nfs4_stateowner * 10751da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10761da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10771da177e4SLinus Torvalds struct nfs4_replay *rp; 10781da177e4SLinus Torvalds unsigned int idhashval; 10791da177e4SLinus Torvalds 10801da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10811da177e4SLinus Torvalds return NULL; 10821da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10831da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10841da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10851da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1086ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1087ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10881da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10891da177e4SLinus Torvalds sop->so_time = 0; 10901da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10911da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1092ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10931da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10941da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10951da177e4SLinus Torvalds sop->so_client = clp; 10961da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10971da177e4SLinus Torvalds sop->so_confirmed = 0; 10981da177e4SLinus Torvalds rp = &sop->so_replay; 1099de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 11001da177e4SLinus Torvalds rp->rp_buflen = 0; 11011da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 11021da177e4SLinus Torvalds return sop; 11031da177e4SLinus Torvalds } 11041da177e4SLinus Torvalds 11051da177e4SLinus Torvalds static void 11061da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11071da177e4SLinus Torvalds { 11081da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11091da177e4SLinus Torvalds 1110ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1111ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1112ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1113ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11141da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11151da177e4SLinus Torvalds release_stateowner(lock_sop); 11161da177e4SLinus Torvalds } 11171da177e4SLinus Torvalds } 11181da177e4SLinus Torvalds 11191da177e4SLinus Torvalds static void 11201da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11211da177e4SLinus Torvalds { 11221da177e4SLinus Torvalds struct nfs4_stateid *stp; 11231da177e4SLinus Torvalds 11241da177e4SLinus Torvalds list_del(&sop->so_idhash); 11251da177e4SLinus Torvalds list_del(&sop->so_strhash); 11266fa305deSNeilBrown if (sop->so_is_open_owner) 11271da177e4SLinus Torvalds list_del(&sop->so_perclient); 1128ea1da636SNeilBrown list_del(&sop->so_perstateid); 1129ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1130ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1131ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11321da177e4SLinus Torvalds if (sop->so_is_open_owner) 11331da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11341da177e4SLinus Torvalds else 11351da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11361da177e4SLinus Torvalds } 11371da177e4SLinus Torvalds } 11381da177e4SLinus Torvalds 11391da177e4SLinus Torvalds static void 11401da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11411da177e4SLinus Torvalds { 11421da177e4SLinus Torvalds unhash_stateowner(sop); 11431da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11441da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11451da177e4SLinus Torvalds } 11461da177e4SLinus Torvalds 11471da177e4SLinus Torvalds static inline void 11481da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11491da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11501da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11511da177e4SLinus Torvalds 11521da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1153ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1154ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11551da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11561da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1157ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11588beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11591da177e4SLinus Torvalds stp->st_stateowner = sop; 116013cd2184SNeilBrown get_nfs4_file(fp); 11611da177e4SLinus Torvalds stp->st_file = fp; 11621da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11631da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11641da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11651da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11661da177e4SLinus Torvalds stp->st_access_bmap = 0; 11671da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11681da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11691da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11704c4cd222SNeilBrown stp->st_openstp = NULL; 11711da177e4SLinus Torvalds } 11721da177e4SLinus Torvalds 11731da177e4SLinus Torvalds static void 11741da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11751da177e4SLinus Torvalds { 11761da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11771da177e4SLinus Torvalds 11781da177e4SLinus Torvalds list_del(&stp->st_hash); 11791da177e4SLinus Torvalds list_del(&stp->st_perfile); 1180ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11811da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11821da177e4SLinus Torvalds release_stateid_lockowners(stp); 11831da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11841da177e4SLinus Torvalds nfsd_close(filp); 11851da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11861da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 118713cd2184SNeilBrown put_nfs4_file(stp->st_file); 11885ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11891da177e4SLinus Torvalds } 11901da177e4SLinus Torvalds 1191fd39ca9aSNeilBrown static void 11921da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11931da177e4SLinus Torvalds { 11941da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11951da177e4SLinus Torvalds 11961da177e4SLinus Torvalds unhash_stateowner(sop); 11971da177e4SLinus Torvalds list_add_tail(&sop->so_close_lru, &close_lru); 11981da177e4SLinus Torvalds sop->so_time = get_seconds(); 11991da177e4SLinus Torvalds } 12001da177e4SLinus Torvalds 12011da177e4SLinus Torvalds static int 12021da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 12031da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 12041da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 12051da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 12061da177e4SLinus Torvalds } 12071da177e4SLinus Torvalds 12081da177e4SLinus Torvalds static struct nfs4_stateowner * 12091da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12101da177e4SLinus Torvalds { 12111da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12121da177e4SLinus Torvalds 12131da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12141da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12151da177e4SLinus Torvalds return so; 12161da177e4SLinus Torvalds } 12171da177e4SLinus Torvalds return NULL; 12181da177e4SLinus Torvalds } 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12211da177e4SLinus Torvalds static struct nfs4_file * 12221da177e4SLinus Torvalds find_file(struct inode *ino) 12231da177e4SLinus Torvalds { 12241da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12251da177e4SLinus Torvalds struct nfs4_file *fp; 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 122813cd2184SNeilBrown if (fp->fi_inode == ino) { 122913cd2184SNeilBrown get_nfs4_file(fp); 12301da177e4SLinus Torvalds return fp; 12311da177e4SLinus Torvalds } 123213cd2184SNeilBrown } 12331da177e4SLinus Torvalds return NULL; 12341da177e4SLinus Torvalds } 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) 12371da177e4SLinus Torvalds #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) 12381da177e4SLinus Torvalds 1239fd39ca9aSNeilBrown static void 12401da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12411da177e4SLinus Torvalds int i; 12421da177e4SLinus Torvalds 12431da177e4SLinus Torvalds *access = 0; 12441da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12451da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12461da177e4SLinus Torvalds *access |= i; 12471da177e4SLinus Torvalds } 12481da177e4SLinus Torvalds } 12491da177e4SLinus Torvalds 1250fd39ca9aSNeilBrown static void 12511da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12521da177e4SLinus Torvalds int i; 12531da177e4SLinus Torvalds 12541da177e4SLinus Torvalds *deny = 0; 12551da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12561da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12571da177e4SLinus Torvalds *deny |= i ; 12581da177e4SLinus Torvalds } 12591da177e4SLinus Torvalds } 12601da177e4SLinus Torvalds 12611da177e4SLinus Torvalds static int 12621da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12631da177e4SLinus Torvalds unsigned int access, deny; 12641da177e4SLinus Torvalds 12651da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12661da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12671da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12681da177e4SLinus Torvalds return 0; 12691da177e4SLinus Torvalds return 1; 12701da177e4SLinus Torvalds } 12711da177e4SLinus Torvalds 12721da177e4SLinus Torvalds /* 12731da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12741da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12751da177e4SLinus Torvalds */ 1276fd39ca9aSNeilBrown static int 12771da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12781da177e4SLinus Torvalds { 12791da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12801da177e4SLinus Torvalds struct nfs4_file *fp; 12811da177e4SLinus Torvalds struct nfs4_stateid *stp; 128213cd2184SNeilBrown int ret; 12831da177e4SLinus Torvalds 12841da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12851da177e4SLinus Torvalds 12861da177e4SLinus Torvalds fp = find_file(ino); 128713cd2184SNeilBrown if (!fp) 128813cd2184SNeilBrown return nfs_ok; 1289b700949bSNeilBrown ret = nfserr_locked; 12901da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12918beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12921da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12931da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 129413cd2184SNeilBrown goto out; 12951da177e4SLinus Torvalds } 129613cd2184SNeilBrown ret = nfs_ok; 129713cd2184SNeilBrown out: 129813cd2184SNeilBrown put_nfs4_file(fp); 129913cd2184SNeilBrown return ret; 13001da177e4SLinus Torvalds } 13011da177e4SLinus Torvalds 13021da177e4SLinus Torvalds static inline void 13031da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13041da177e4SLinus Torvalds { 13051da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13061da177e4SLinus Torvalds put_write_access(filp->f_dentry->d_inode); 13071da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13081da177e4SLinus Torvalds } 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds /* 13121da177e4SLinus Torvalds * Recall a delegation 13131da177e4SLinus Torvalds */ 13141da177e4SLinus Torvalds static int 13151da177e4SLinus Torvalds do_recall(void *__dp) 13161da177e4SLinus Torvalds { 13171da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13181da177e4SLinus Torvalds 13191da177e4SLinus Torvalds daemonize("nfsv4-recall"); 13201da177e4SLinus Torvalds 13211da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13221da177e4SLinus Torvalds return 0; 13231da177e4SLinus Torvalds } 13241da177e4SLinus Torvalds 13251da177e4SLinus Torvalds /* 13261da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13271da177e4SLinus Torvalds * by the lease (file_lock) 13281da177e4SLinus Torvalds * 13291da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13301da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13311da177e4SLinus Torvalds * lease. 13321da177e4SLinus Torvalds */ 13331da177e4SLinus Torvalds static 13341da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13351da177e4SLinus Torvalds { 13361da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13371da177e4SLinus Torvalds struct task_struct *t; 13381da177e4SLinus Torvalds 13391da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13401da177e4SLinus Torvalds if (!dp) 13411da177e4SLinus Torvalds return; 13421da177e4SLinus Torvalds 13431da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13441da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13451da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13461da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13471da177e4SLinus Torvalds * it's safe to take a reference: */ 13481da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13491da177e4SLinus Torvalds 13501da177e4SLinus Torvalds spin_lock(&recall_lock); 13511da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13521da177e4SLinus Torvalds spin_unlock(&recall_lock); 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13551da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13561da177e4SLinus Torvalds 13571da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13581da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13591da177e4SLinus Torvalds 13601da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13611da177e4SLinus Torvalds if (IS_ERR(t)) { 13621da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13631da177e4SLinus Torvalds 13641da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13651da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13661da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13671da177e4SLinus Torvalds nfs4_put_delegation(dp); 13681da177e4SLinus Torvalds } 13691da177e4SLinus Torvalds } 13701da177e4SLinus Torvalds 13711da177e4SLinus Torvalds /* 13721da177e4SLinus Torvalds * The file_lock is being reapd. 13731da177e4SLinus Torvalds * 13741da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13751da177e4SLinus Torvalds */ 13761da177e4SLinus Torvalds static 13771da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13781da177e4SLinus Torvalds { 13791da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13801da177e4SLinus Torvalds 13811da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13821da177e4SLinus Torvalds 13831da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13841da177e4SLinus Torvalds return; 13851da177e4SLinus Torvalds dp->dl_flock = NULL; 13861da177e4SLinus Torvalds } 13871da177e4SLinus Torvalds 13881da177e4SLinus Torvalds /* 13891da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13901da177e4SLinus Torvalds * 13911da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held. 13921da177e4SLinus Torvalds */ 13931da177e4SLinus Torvalds static 13941da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13951da177e4SLinus Torvalds { 13961da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 13971da177e4SLinus Torvalds 13981da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 13991da177e4SLinus Torvalds if (!dp) 14001da177e4SLinus Torvalds return; 14011da177e4SLinus Torvalds dp->dl_flock = new; 14021da177e4SLinus Torvalds } 14031da177e4SLinus Torvalds 14041da177e4SLinus Torvalds /* 14051da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held 14061da177e4SLinus Torvalds */ 14071da177e4SLinus Torvalds static 14081da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14091da177e4SLinus Torvalds { 14101da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14111da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14121da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14131da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14141da177e4SLinus Torvalds 14151da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14161da177e4SLinus Torvalds return 0; 14171da177e4SLinus Torvalds 14181da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14191da177e4SLinus Torvalds } 14201da177e4SLinus Torvalds 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds static 14231da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14241da177e4SLinus Torvalds { 14251da177e4SLinus Torvalds if (arg & F_UNLCK) 14261da177e4SLinus Torvalds return lease_modify(onlist, arg); 14271da177e4SLinus Torvalds else 14281da177e4SLinus Torvalds return -EAGAIN; 14291da177e4SLinus Torvalds } 14301da177e4SLinus Torvalds 1431fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14321da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14331da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14341da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14351da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14361da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14371da177e4SLinus Torvalds }; 14381da177e4SLinus Torvalds 14391da177e4SLinus Torvalds 14401da177e4SLinus Torvalds int 14411da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14421da177e4SLinus Torvalds { 14431da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14441da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14451da177e4SLinus Torvalds unsigned int strhashval; 14461da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14490f442aa2SJ. Bruce Fields return nfserr_inval; 14501da177e4SLinus Torvalds 14511da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14521da177e4SLinus Torvalds return nfserr_stale_clientid; 14531da177e4SLinus Torvalds 14541da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14551da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14561da177e4SLinus Torvalds open->op_stateowner = sop; 14570f442aa2SJ. Bruce Fields if (!sop) { 14580f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14590f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14600f442aa2SJ. Bruce Fields if (clp == NULL) 14610f442aa2SJ. Bruce Fields return nfserr_expired; 14620f442aa2SJ. Bruce Fields goto renew; 14630f442aa2SJ. Bruce Fields } 1464ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14650f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1466ae8b6253SJ. Bruce Fields clp = sop->so_client; 1467ae8b6253SJ. Bruce Fields release_stateowner(sop); 14680f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1469ae8b6253SJ. Bruce Fields goto renew; 14700f442aa2SJ. Bruce Fields } 14710f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14721da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 14731da177e4SLinus Torvalds return NFSERR_REPLAY_ME; 14741da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14751da177e4SLinus Torvalds * that we don't even have replay data saved! 14761da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14771da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14781da177e4SLinus Torvalds * fail again for the same reason. 14791da177e4SLinus Torvalds */ 14800f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14811da177e4SLinus Torvalds goto renew; 14821da177e4SLinus Torvalds } 14830f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14840f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14850f442aa2SJ. Bruce Fields renew: 14860f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14871da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14881da177e4SLinus Torvalds if (sop == NULL) 14890f442aa2SJ. Bruce Fields return nfserr_resource; 14901da177e4SLinus Torvalds open->op_stateowner = sop; 14910f442aa2SJ. Bruce Fields } 14920f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14931da177e4SLinus Torvalds renew_client(sop->so_client); 14940f442aa2SJ. Bruce Fields return nfs_ok; 14951da177e4SLinus Torvalds } 14961da177e4SLinus Torvalds 14974a6e43e6SNeilBrown static inline int 14984a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 14994a6e43e6SNeilBrown { 15004a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15014a6e43e6SNeilBrown return nfserr_openmode; 15024a6e43e6SNeilBrown else 15034a6e43e6SNeilBrown return nfs_ok; 15044a6e43e6SNeilBrown } 15054a6e43e6SNeilBrown 150652f4fb43SNeilBrown static struct nfs4_delegation * 150752f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 150852f4fb43SNeilBrown { 150952f4fb43SNeilBrown struct nfs4_delegation *dp; 151052f4fb43SNeilBrown 1511ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 151252f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 151352f4fb43SNeilBrown return dp; 151452f4fb43SNeilBrown } 151552f4fb43SNeilBrown return NULL; 151652f4fb43SNeilBrown } 151752f4fb43SNeilBrown 1518c44c5eebSNeilBrown static int 1519567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1520567d9829SNeilBrown struct nfs4_delegation **dp) 1521567d9829SNeilBrown { 1522567d9829SNeilBrown int flags; 1523c44c5eebSNeilBrown int status = nfserr_bad_stateid; 1524567d9829SNeilBrown 1525567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1526567d9829SNeilBrown if (*dp == NULL) 1527c44c5eebSNeilBrown goto out; 1528567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1529567d9829SNeilBrown RD_STATE : WR_STATE; 1530567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1531567d9829SNeilBrown if (status) 1532567d9829SNeilBrown *dp = NULL; 1533c44c5eebSNeilBrown out: 1534c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1535c44c5eebSNeilBrown return nfs_ok; 1536c44c5eebSNeilBrown if (status) 1537c44c5eebSNeilBrown return status; 1538c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1539c44c5eebSNeilBrown return nfs_ok; 1540567d9829SNeilBrown } 1541567d9829SNeilBrown 15421da177e4SLinus Torvalds static int 15431da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15441da177e4SLinus Torvalds { 15451da177e4SLinus Torvalds struct nfs4_stateid *local; 15461da177e4SLinus Torvalds int status = nfserr_share_denied; 15471da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15481da177e4SLinus Torvalds 15498beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15501da177e4SLinus Torvalds /* ignore lock owners */ 15511da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15521da177e4SLinus Torvalds continue; 15531da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15541da177e4SLinus Torvalds if (local->st_stateowner == sop) 15551da177e4SLinus Torvalds *stpp = local; 15561da177e4SLinus Torvalds /* check for conflicting share reservations */ 15571da177e4SLinus Torvalds if (!test_share(local, open)) 15581da177e4SLinus Torvalds goto out; 15591da177e4SLinus Torvalds } 15601da177e4SLinus Torvalds status = 0; 15611da177e4SLinus Torvalds out: 15621da177e4SLinus Torvalds return status; 15631da177e4SLinus Torvalds } 15641da177e4SLinus Torvalds 15655ac049acSNeilBrown static inline struct nfs4_stateid * 15665ac049acSNeilBrown nfs4_alloc_stateid(void) 15675ac049acSNeilBrown { 15685ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15695ac049acSNeilBrown } 15705ac049acSNeilBrown 15711da177e4SLinus Torvalds static int 15721da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1573567d9829SNeilBrown struct nfs4_delegation *dp, 15741da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15751da177e4SLinus Torvalds { 15761da177e4SLinus Torvalds struct nfs4_stateid *stp; 15771da177e4SLinus Torvalds 15785ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15791da177e4SLinus Torvalds if (stp == NULL) 15801da177e4SLinus Torvalds return nfserr_resource; 15811da177e4SLinus Torvalds 1582567d9829SNeilBrown if (dp) { 1583567d9829SNeilBrown get_file(dp->dl_vfs_file); 1584567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1585567d9829SNeilBrown } else { 1586567d9829SNeilBrown int status; 1587567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1588567d9829SNeilBrown &stp->st_vfs_file); 15891da177e4SLinus Torvalds if (status) { 15901da177e4SLinus Torvalds if (status == nfserr_dropit) 15911da177e4SLinus Torvalds status = nfserr_jukebox; 15925ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15931da177e4SLinus Torvalds return status; 15941da177e4SLinus Torvalds } 1595567d9829SNeilBrown } 15961da177e4SLinus Torvalds *stpp = stp; 15971da177e4SLinus Torvalds return 0; 15981da177e4SLinus Torvalds } 15991da177e4SLinus Torvalds 16001da177e4SLinus Torvalds static inline int 16011da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16021da177e4SLinus Torvalds struct nfsd4_open *open) 16031da177e4SLinus Torvalds { 16041da177e4SLinus Torvalds struct iattr iattr = { 16051da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16061da177e4SLinus Torvalds .ia_size = 0, 16071da177e4SLinus Torvalds }; 16081da177e4SLinus Torvalds if (!open->op_truncate) 16091da177e4SLinus Torvalds return 0; 16101da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16119246585aSAl Viro return nfserr_inval; 16121da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16131da177e4SLinus Torvalds } 16141da177e4SLinus Torvalds 16151da177e4SLinus Torvalds static int 16161da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16171da177e4SLinus Torvalds { 16181da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16191da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 16206c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 16211da177e4SLinus Torvalds int status; 16221da177e4SLinus Torvalds 16231da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16246c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 16256c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 16261da177e4SLinus Torvalds 16276c26d08fSJ. Bruce Fields if (new_writer) { 16281da177e4SLinus Torvalds status = get_write_access(inode); 16291da177e4SLinus Torvalds if (status) 16301da177e4SLinus Torvalds return nfserrno(status); 16316c26d08fSJ. Bruce Fields } 16321da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16331da177e4SLinus Torvalds if (status) { 16346c26d08fSJ. Bruce Fields if (new_writer) 16351da177e4SLinus Torvalds put_write_access(inode); 16361da177e4SLinus Torvalds return status; 16371da177e4SLinus Torvalds } 16381da177e4SLinus Torvalds /* remember the open */ 16396c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 16401da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16411da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16421da177e4SLinus Torvalds 16431da177e4SLinus Torvalds return nfs_ok; 16441da177e4SLinus Torvalds } 16451da177e4SLinus Torvalds 16461da177e4SLinus Torvalds 16471da177e4SLinus Torvalds static void 164837515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16491da177e4SLinus Torvalds { 16501da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1651c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16521da177e4SLinus Torvalds } 16531da177e4SLinus Torvalds 16541da177e4SLinus Torvalds /* 16551da177e4SLinus Torvalds * Attempt to hand out a delegation. 16561da177e4SLinus Torvalds */ 16571da177e4SLinus Torvalds static void 16581da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16591da177e4SLinus Torvalds { 16601da177e4SLinus Torvalds struct nfs4_delegation *dp; 16611da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16621da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16631da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16641da177e4SLinus Torvalds int status, flag = 0; 16651da177e4SLinus Torvalds 16661da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16677b190fecSNeilBrown open->op_recall = 0; 16687b190fecSNeilBrown switch (open->op_claim_type) { 16697b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16707b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16717b190fecSNeilBrown open->op_recall = 1; 16727b190fecSNeilBrown flag = open->op_delegate_type; 16737b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16741da177e4SLinus Torvalds goto out; 16757b190fecSNeilBrown break; 16767b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16777b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16787b190fecSNeilBrown * had the chance to reclaim theirs.... */ 16797b190fecSNeilBrown if (nfs4_in_grace()) 16807b190fecSNeilBrown goto out; 16817b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16827b190fecSNeilBrown goto out; 16831da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16841da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16851da177e4SLinus Torvalds else 16861da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16877b190fecSNeilBrown break; 16887b190fecSNeilBrown default: 16897b190fecSNeilBrown goto out; 16907b190fecSNeilBrown } 16911da177e4SLinus Torvalds 16921da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16931da177e4SLinus Torvalds if (dp == NULL) { 16941da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16951da177e4SLinus Torvalds goto out; 16961da177e4SLinus Torvalds } 16971da177e4SLinus Torvalds locks_init_lock(&fl); 16981da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 16991da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17001da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17011da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17021da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17031da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17041da177e4SLinus Torvalds 17051da177e4SLinus Torvalds /* setlease checks to see if delegation should be handed out. 17061da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17071da177e4SLinus Torvalds */ 17081da177e4SLinus Torvalds if ((status = setlease(stp->st_vfs_file, 17091da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17101da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1711c907132dSNeilBrown unhash_delegation(dp); 17121da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17131da177e4SLinus Torvalds goto out; 17141da177e4SLinus Torvalds } 17151da177e4SLinus Torvalds 17161da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17191da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17201da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17211da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17221da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17231da177e4SLinus Torvalds out: 17247b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17257b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17267b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17277b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17281da177e4SLinus Torvalds open->op_delegate_type = flag; 17291da177e4SLinus Torvalds } 17301da177e4SLinus Torvalds 17311da177e4SLinus Torvalds /* 17321da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17331da177e4SLinus Torvalds */ 17341da177e4SLinus Torvalds int 17351da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17361da177e4SLinus Torvalds { 17371da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17381da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17391da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1740567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 17411da177e4SLinus Torvalds int status; 17421da177e4SLinus Torvalds 17431da177e4SLinus Torvalds status = nfserr_inval; 17441da177e4SLinus Torvalds if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) 17451da177e4SLinus Torvalds goto out; 17461da177e4SLinus Torvalds /* 17471da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17481da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17491da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17501da177e4SLinus Torvalds */ 17511da177e4SLinus Torvalds fp = find_file(ino); 17521da177e4SLinus Torvalds if (fp) { 17531da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17541da177e4SLinus Torvalds goto out; 1755c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1756c44c5eebSNeilBrown if (status) 1757c44c5eebSNeilBrown goto out; 17581da177e4SLinus Torvalds } else { 1759c44c5eebSNeilBrown status = nfserr_bad_stateid; 1760c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1761c44c5eebSNeilBrown goto out; 17621da177e4SLinus Torvalds status = nfserr_resource; 17631da177e4SLinus Torvalds fp = alloc_init_file(ino); 17641da177e4SLinus Torvalds if (fp == NULL) 17651da177e4SLinus Torvalds goto out; 17661da177e4SLinus Torvalds } 17671da177e4SLinus Torvalds 17681da177e4SLinus Torvalds /* 17691da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17701da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17711da177e4SLinus Torvalds */ 17721da177e4SLinus Torvalds if (stp) { 17731da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17741da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17751da177e4SLinus Torvalds if (status) 17761da177e4SLinus Torvalds goto out; 1777444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17781da177e4SLinus Torvalds } else { 17791da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17801da177e4SLinus Torvalds int flags = 0; 17811da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17821da177e4SLinus Torvalds flags = MAY_WRITE; 17831da177e4SLinus Torvalds else 17841da177e4SLinus Torvalds flags = MAY_READ; 1785567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1786567d9829SNeilBrown if (status) 17871da177e4SLinus Torvalds goto out; 17881da177e4SLinus Torvalds init_stateid(stp, fp, open); 17891da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17901da177e4SLinus Torvalds if (status) { 17911da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17921da177e4SLinus Torvalds goto out; 17931da177e4SLinus Torvalds } 17941da177e4SLinus Torvalds } 17951da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 17961da177e4SLinus Torvalds 17971da177e4SLinus Torvalds /* 17981da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 17991da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18001da177e4SLinus Torvalds */ 18011da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18021da177e4SLinus Torvalds 18031da177e4SLinus Torvalds status = nfs_ok; 18041da177e4SLinus Torvalds 18051da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18061da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18071da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18081da177e4SLinus Torvalds out: 180913cd2184SNeilBrown if (fp) 181013cd2184SNeilBrown put_nfs4_file(fp); 181137515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 181237515177SNeilBrown nfs4_set_claim_prev(open); 18131da177e4SLinus Torvalds /* 18141da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18151da177e4SLinus Torvalds */ 18161da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18171da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18181da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18191da177e4SLinus Torvalds 18201da177e4SLinus Torvalds return status; 18211da177e4SLinus Torvalds } 18221da177e4SLinus Torvalds 182358da282bSNeilBrown static struct workqueue_struct *laundry_wq; 18241da177e4SLinus Torvalds static struct work_struct laundromat_work; 18251da177e4SLinus Torvalds static void laundromat_main(void *); 18261da177e4SLinus Torvalds static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 18271da177e4SLinus Torvalds 18281da177e4SLinus Torvalds int 18291da177e4SLinus Torvalds nfsd4_renew(clientid_t *clid) 18301da177e4SLinus Torvalds { 18311da177e4SLinus Torvalds struct nfs4_client *clp; 18321da177e4SLinus Torvalds int status; 18331da177e4SLinus Torvalds 18341da177e4SLinus Torvalds nfs4_lock_state(); 18351da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18361da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18371da177e4SLinus Torvalds status = nfserr_stale_clientid; 18381da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18391da177e4SLinus Torvalds goto out; 18401da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18411da177e4SLinus Torvalds status = nfserr_expired; 18421da177e4SLinus Torvalds if (clp == NULL) { 18431da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18441da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18451da177e4SLinus Torvalds goto out; 18461da177e4SLinus Torvalds } 18471da177e4SLinus Torvalds renew_client(clp); 18481da177e4SLinus Torvalds status = nfserr_cb_path_down; 1849ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18501da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18511da177e4SLinus Torvalds goto out; 18521da177e4SLinus Torvalds status = nfs_ok; 18531da177e4SLinus Torvalds out: 18541da177e4SLinus Torvalds nfs4_unlock_state(); 18551da177e4SLinus Torvalds return status; 18561da177e4SLinus Torvalds } 18571da177e4SLinus Torvalds 1858a76b4319SNeilBrown static void 1859a76b4319SNeilBrown end_grace(void) 1860a76b4319SNeilBrown { 1861a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1862c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1863a76b4319SNeilBrown in_grace = 0; 1864a76b4319SNeilBrown } 1865a76b4319SNeilBrown 1866fd39ca9aSNeilBrown static time_t 18671da177e4SLinus Torvalds nfs4_laundromat(void) 18681da177e4SLinus Torvalds { 18691da177e4SLinus Torvalds struct nfs4_client *clp; 18701da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18711da177e4SLinus Torvalds struct nfs4_delegation *dp; 18721da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18731da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18741da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18751da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18761da177e4SLinus Torvalds 18771da177e4SLinus Torvalds nfs4_lock_state(); 18781da177e4SLinus Torvalds 18791da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1880a76b4319SNeilBrown if (in_grace) 1881a76b4319SNeilBrown end_grace(); 18821da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18831da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18841da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18851da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18861da177e4SLinus Torvalds if (clientid_val > t) 18871da177e4SLinus Torvalds clientid_val = t; 18881da177e4SLinus Torvalds break; 18891da177e4SLinus Torvalds } 18901da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18911da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1892c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18931da177e4SLinus Torvalds expire_client(clp); 18941da177e4SLinus Torvalds } 18951da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 18961da177e4SLinus Torvalds spin_lock(&recall_lock); 18971da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 18981da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18991da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19001da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19011da177e4SLinus Torvalds if (test_val > u) 19021da177e4SLinus Torvalds test_val = u; 19031da177e4SLinus Torvalds break; 19041da177e4SLinus Torvalds } 19051da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19061da177e4SLinus Torvalds dp, dp->dl_flock); 19071da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19081da177e4SLinus Torvalds } 19091da177e4SLinus Torvalds spin_unlock(&recall_lock); 19101da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19111da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19121da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19131da177e4SLinus Torvalds unhash_delegation(dp); 19141da177e4SLinus Torvalds } 19151da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19161da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19171da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19181da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19191da177e4SLinus Torvalds u = sop->so_time - cutoff; 19201da177e4SLinus Torvalds if (test_val > u) 19211da177e4SLinus Torvalds test_val = u; 19221da177e4SLinus Torvalds break; 19231da177e4SLinus Torvalds } 19241da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19251da177e4SLinus Torvalds sop->so_id); 19261da177e4SLinus Torvalds list_del(&sop->so_close_lru); 19271da177e4SLinus Torvalds nfs4_put_stateowner(sop); 19281da177e4SLinus Torvalds } 19291da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19301da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19311da177e4SLinus Torvalds nfs4_unlock_state(); 19321da177e4SLinus Torvalds return clientid_val; 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds 19351da177e4SLinus Torvalds void 19361da177e4SLinus Torvalds laundromat_main(void *not_used) 19371da177e4SLinus Torvalds { 19381da177e4SLinus Torvalds time_t t; 19391da177e4SLinus Torvalds 19401da177e4SLinus Torvalds t = nfs4_laundromat(); 19411da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 194258da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19431da177e4SLinus Torvalds } 19441da177e4SLinus Torvalds 1945fd39ca9aSNeilBrown static struct nfs4_stateowner * 1946f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1947f8816512SNeilBrown { 19481da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19491da177e4SLinus Torvalds 19501da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19511da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19521da177e4SLinus Torvalds if (local->so_id == st_id) 19531da177e4SLinus Torvalds return local; 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds } 19561da177e4SLinus Torvalds return NULL; 19571da177e4SLinus Torvalds } 19581da177e4SLinus Torvalds 19591da177e4SLinus Torvalds static inline int 19601da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19611da177e4SLinus Torvalds { 19621da177e4SLinus Torvalds return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 19631da177e4SLinus Torvalds } 19641da177e4SLinus Torvalds 19651da177e4SLinus Torvalds static int 19661da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19671da177e4SLinus Torvalds { 19681da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19691da177e4SLinus Torvalds return 0; 1970849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19711da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19721da177e4SLinus Torvalds stateid->si_generation); 19731da177e4SLinus Torvalds return 1; 19741da177e4SLinus Torvalds } 19751da177e4SLinus Torvalds 19761da177e4SLinus Torvalds static inline int 19771da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19781da177e4SLinus Torvalds { 19791da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19801da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19811da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19821da177e4SLinus Torvalds } 19831da177e4SLinus Torvalds 19841da177e4SLinus Torvalds static inline int 19851da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19861da177e4SLinus Torvalds { 19871da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19881da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds 19911da177e4SLinus Torvalds static 19921da177e4SLinus Torvalds int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19931da177e4SLinus Torvalds { 19941da177e4SLinus Torvalds int status = nfserr_openmode; 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 19971da177e4SLinus Torvalds goto out; 19981da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 19991da177e4SLinus Torvalds goto out; 20001da177e4SLinus Torvalds status = nfs_ok; 20011da177e4SLinus Torvalds out: 20021da177e4SLinus Torvalds return status; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds static inline int 20061da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20071da177e4SLinus Torvalds { 20081da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20091da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20101da177e4SLinus Torvalds return nfserr_bad_stateid; 20111da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20121da177e4SLinus Torvalds return nfs_ok; 20131da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20141da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20151da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20161da177e4SLinus Torvalds return nfserr_grace; 20171da177e4SLinus Torvalds } else if (flags & WR_STATE) 20181da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20191da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20201da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20211da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20221da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20231da177e4SLinus Torvalds } 20241da177e4SLinus Torvalds 20251da177e4SLinus Torvalds /* 20261da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20271da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20281da177e4SLinus Torvalds */ 20291da177e4SLinus Torvalds static inline int 20301da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20311da177e4SLinus Torvalds { 20321da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 20331da177e4SLinus Torvalds && MANDATORY_LOCK(inode); 20341da177e4SLinus Torvalds } 20351da177e4SLinus Torvalds 20361da177e4SLinus Torvalds /* 20371da177e4SLinus Torvalds * Checks for stateid operations 20381da177e4SLinus Torvalds */ 20391da177e4SLinus Torvalds int 20401da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20411da177e4SLinus Torvalds { 20421da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20431da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20441da177e4SLinus Torvalds stateid_t *stidp; 20451da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20461da177e4SLinus Torvalds int status; 20471da177e4SLinus Torvalds 20481da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20491da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20501da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20511da177e4SLinus Torvalds if (filpp) 20521da177e4SLinus Torvalds *filpp = NULL; 20531da177e4SLinus Torvalds 20541da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20551da177e4SLinus Torvalds return nfserr_grace; 20561da177e4SLinus Torvalds 20571da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20581da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20591da177e4SLinus Torvalds 20601da177e4SLinus Torvalds /* STALE STATEID */ 20611da177e4SLinus Torvalds status = nfserr_stale_stateid; 20621da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20631da177e4SLinus Torvalds goto out; 20641da177e4SLinus Torvalds 20651da177e4SLinus Torvalds /* BAD STATEID */ 20661da177e4SLinus Torvalds status = nfserr_bad_stateid; 20671da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20681da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20691da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20701da177e4SLinus Torvalds if (nfs4_in_grace()) 20711da177e4SLinus Torvalds status = nfserr_grace; 20721da177e4SLinus Torvalds goto out; 20731da177e4SLinus Torvalds } 20741da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20751da177e4SLinus Torvalds } else { /* open or lock stateid */ 20761da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20771da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20781da177e4SLinus Torvalds if (nfs4_in_grace()) 20791da177e4SLinus Torvalds status = nfserr_grace; 20801da177e4SLinus Torvalds goto out; 20811da177e4SLinus Torvalds } 20821da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20831da177e4SLinus Torvalds goto out; 20841da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20851da177e4SLinus Torvalds goto out; 20861da177e4SLinus Torvalds stidp = &stp->st_stateid; 20871da177e4SLinus Torvalds } 20881da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 20891da177e4SLinus Torvalds goto out; 20901da177e4SLinus Torvalds 20911da177e4SLinus Torvalds /* OLD STATEID */ 20921da177e4SLinus Torvalds status = nfserr_old_stateid; 20931da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 20941da177e4SLinus Torvalds goto out; 20951da177e4SLinus Torvalds if (stp) { 20961da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 20971da177e4SLinus Torvalds goto out; 20981da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 20991da177e4SLinus Torvalds if (filpp) 21001da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21011da177e4SLinus Torvalds } else if (dp) { 21021da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 21031da177e4SLinus Torvalds goto out; 21041da177e4SLinus Torvalds renew_client(dp->dl_client); 21051da177e4SLinus Torvalds if (flags & DELEG_RET) 21061da177e4SLinus Torvalds unhash_delegation(dp); 21071da177e4SLinus Torvalds if (filpp) 21081da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21091da177e4SLinus Torvalds } 21101da177e4SLinus Torvalds status = nfs_ok; 21111da177e4SLinus Torvalds out: 21121da177e4SLinus Torvalds return status; 21131da177e4SLinus Torvalds } 21141da177e4SLinus Torvalds 21154c4cd222SNeilBrown static inline int 21164c4cd222SNeilBrown setlkflg (int type) 21174c4cd222SNeilBrown { 21184c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21194c4cd222SNeilBrown RD_STATE : WR_STATE; 21204c4cd222SNeilBrown } 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvalds /* 21231da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21241da177e4SLinus Torvalds */ 2125fd39ca9aSNeilBrown static int 21264c4cd222SNeilBrown nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 21271da177e4SLinus Torvalds { 21281da177e4SLinus Torvalds struct nfs4_stateid *stp; 21291da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21301da177e4SLinus Torvalds 21311da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21321da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21331da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21341da177e4SLinus Torvalds stateid->si_generation); 21351da177e4SLinus Torvalds 21361da177e4SLinus Torvalds *stpp = NULL; 21371da177e4SLinus Torvalds *sopp = NULL; 21381da177e4SLinus Torvalds 21391da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21401da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21413a4f98bbSNeilBrown return nfserr_bad_stateid; 21421da177e4SLinus Torvalds } 21431da177e4SLinus Torvalds 21441da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21453a4f98bbSNeilBrown return nfserr_stale_stateid; 21461da177e4SLinus Torvalds /* 21471da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21481da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21491da177e4SLinus Torvalds * number is incorrect. 21501da177e4SLinus Torvalds */ 2151f8816512SNeilBrown stp = find_stateid(stateid, flags); 2152f8816512SNeilBrown if (stp == NULL) { 2153f8816512SNeilBrown /* 2154f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2155f8816512SNeilBrown * a replayed close: 2156f8816512SNeilBrown */ 2157f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2158f8816512SNeilBrown if (sop == NULL) 2159f8816512SNeilBrown return nfserr_bad_stateid; 2160f8816512SNeilBrown *sopp = sop; 2161f8816512SNeilBrown goto check_replay; 2162f8816512SNeilBrown } 21631da177e4SLinus Torvalds 21644c4cd222SNeilBrown if (lock) { 21651da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 21664c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21671da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21684c4cd222SNeilBrown int lkflg = 0; 21694c4cd222SNeilBrown int status; 21701da177e4SLinus Torvalds 21714c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21724c4cd222SNeilBrown 21734c4cd222SNeilBrown if (lock->lk_is_new) { 21741da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21753a4f98bbSNeilBrown return nfserr_bad_stateid; 21761da177e4SLinus Torvalds if (!cmp_clid(&clp->cl_clientid, lockclid)) 21773a4f98bbSNeilBrown return nfserr_bad_stateid; 21784c4cd222SNeilBrown /* stp is the open stateid */ 21794c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21804c4cd222SNeilBrown if (status) 21814c4cd222SNeilBrown return status; 21824c4cd222SNeilBrown } else { 21834c4cd222SNeilBrown /* stp is the lock stateid */ 21844c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21854c4cd222SNeilBrown if (status) 21864c4cd222SNeilBrown return status; 21874c4cd222SNeilBrown } 21884c4cd222SNeilBrown 21891da177e4SLinus Torvalds } 21901da177e4SLinus Torvalds 21911da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 21921da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21933a4f98bbSNeilBrown return nfserr_bad_stateid; 21941da177e4SLinus Torvalds } 21951da177e4SLinus Torvalds 21961da177e4SLinus Torvalds *stpp = stp; 21971da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 21981da177e4SLinus Torvalds 21991da177e4SLinus Torvalds /* 22001da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22011da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22021da177e4SLinus Torvalds * generation number wraparound. 22031da177e4SLinus Torvalds */ 2204bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22051da177e4SLinus Torvalds goto check_replay; 22061da177e4SLinus Torvalds 22073a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 22083a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: expected" 22093a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 22103a4f98bbSNeilBrown return nfserr_bad_stateid; 22111da177e4SLinus Torvalds } 22123a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22133a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: stateowner not" 22143a4f98bbSNeilBrown " confirmed yet!\n"); 22153a4f98bbSNeilBrown return nfserr_bad_stateid; 22161da177e4SLinus Torvalds } 22171da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22181da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22193a4f98bbSNeilBrown return nfserr_bad_stateid; 22201da177e4SLinus Torvalds } 22211da177e4SLinus Torvalds 22221da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22231da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: old stateid!\n"); 22243a4f98bbSNeilBrown return nfserr_old_stateid; 22251da177e4SLinus Torvalds } 222652fd004eSNeilBrown renew_client(sop->so_client); 22273a4f98bbSNeilBrown return nfs_ok; 22281da177e4SLinus Torvalds 22291da177e4SLinus Torvalds check_replay: 2230bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2231849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22321da177e4SLinus Torvalds /* indicate replay to calling function */ 22333a4f98bbSNeilBrown return NFSERR_REPLAY_ME; 22341da177e4SLinus Torvalds } 22353a4f98bbSNeilBrown printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22363a4f98bbSNeilBrown sop->so_seqid, seqid); 22373a4f98bbSNeilBrown *sopp = NULL; 22383a4f98bbSNeilBrown return nfserr_bad_seqid; 22391da177e4SLinus Torvalds } 22401da177e4SLinus Torvalds 22411da177e4SLinus Torvalds int 2242f2327d9aSNeil Brown nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner) 22431da177e4SLinus Torvalds { 22441da177e4SLinus Torvalds int status; 22451da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22461da177e4SLinus Torvalds struct nfs4_stateid *stp; 22471da177e4SLinus Torvalds 22481da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 22491da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 22501da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 22511da177e4SLinus Torvalds 22521da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 22531da177e4SLinus Torvalds goto out; 22541da177e4SLinus Torvalds 22551da177e4SLinus Torvalds nfs4_lock_state(); 22561da177e4SLinus Torvalds 22571da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 22581da177e4SLinus Torvalds &oc->oc_req_stateid, 22591da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 22601da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22611da177e4SLinus Torvalds goto out; 22621da177e4SLinus Torvalds 22631da177e4SLinus Torvalds sop = oc->oc_stateowner; 22641da177e4SLinus Torvalds sop->so_confirmed = 1; 22651da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22661da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22671da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22681da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22691da177e4SLinus Torvalds stp->st_stateid.si_boot, 22701da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22711da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22721da177e4SLinus Torvalds stp->st_stateid.si_generation); 2273c7b9a459SNeilBrown 2274c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22751da177e4SLinus Torvalds out: 2276f2327d9aSNeil Brown if (oc->oc_stateowner) { 22771da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2278f2327d9aSNeil Brown *replay_owner = oc->oc_stateowner; 2279f2327d9aSNeil Brown } 22801da177e4SLinus Torvalds nfs4_unlock_state(); 22811da177e4SLinus Torvalds return status; 22821da177e4SLinus Torvalds } 22831da177e4SLinus Torvalds 22841da177e4SLinus Torvalds 22851da177e4SLinus Torvalds /* 22861da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22871da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22881da177e4SLinus Torvalds */ 22891da177e4SLinus Torvalds static void 22901da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22911da177e4SLinus Torvalds { 22921da177e4SLinus Torvalds int i; 22931da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22941da177e4SLinus Torvalds if ((i & access) != i) 22951da177e4SLinus Torvalds __clear_bit(i, bmap); 22961da177e4SLinus Torvalds } 22971da177e4SLinus Torvalds } 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds static void 23001da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23011da177e4SLinus Torvalds { 23021da177e4SLinus Torvalds int i; 23031da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23041da177e4SLinus Torvalds if ((i & deny) != i) 23051da177e4SLinus Torvalds __clear_bit(i, bmap); 23061da177e4SLinus Torvalds } 23071da177e4SLinus Torvalds } 23081da177e4SLinus Torvalds 23091da177e4SLinus Torvalds int 2310f2327d9aSNeil Brown nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) 23111da177e4SLinus Torvalds { 23121da177e4SLinus Torvalds int status; 23131da177e4SLinus Torvalds struct nfs4_stateid *stp; 23141da177e4SLinus Torvalds unsigned int share_access; 23151da177e4SLinus Torvalds 23161da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 23171da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23181da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23191da177e4SLinus Torvalds 23201da177e4SLinus Torvalds if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) 23211da177e4SLinus Torvalds return nfserr_inval; 23221da177e4SLinus Torvalds 23231da177e4SLinus Torvalds nfs4_lock_state(); 23241da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 23251da177e4SLinus Torvalds &od->od_stateid, 23261da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23271da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23281da177e4SLinus Torvalds goto out; 23291da177e4SLinus Torvalds 23301da177e4SLinus Torvalds status = nfserr_inval; 23311da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23321da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23331da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23341da177e4SLinus Torvalds goto out; 23351da177e4SLinus Torvalds } 23361da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23371da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23381da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23391da177e4SLinus Torvalds goto out; 23401da177e4SLinus Torvalds } 23411da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23421da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23431da177e4SLinus Torvalds share_access & ~od->od_share_access); 23441da177e4SLinus Torvalds 23451da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23461da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23471da177e4SLinus Torvalds 23481da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23491da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23501da177e4SLinus Torvalds status = nfs_ok; 23511da177e4SLinus Torvalds out: 2352f2327d9aSNeil Brown if (od->od_stateowner) { 23531da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2354f2327d9aSNeil Brown *replay_owner = od->od_stateowner; 2355f2327d9aSNeil Brown } 23561da177e4SLinus Torvalds nfs4_unlock_state(); 23571da177e4SLinus Torvalds return status; 23581da177e4SLinus Torvalds } 23591da177e4SLinus Torvalds 23601da177e4SLinus Torvalds /* 23611da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23621da177e4SLinus Torvalds */ 23631da177e4SLinus Torvalds int 2364f2327d9aSNeil Brown nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) 23651da177e4SLinus Torvalds { 23661da177e4SLinus Torvalds int status; 23671da177e4SLinus Torvalds struct nfs4_stateid *stp; 23681da177e4SLinus Torvalds 23691da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 23701da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23711da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23721da177e4SLinus Torvalds 23731da177e4SLinus Torvalds nfs4_lock_state(); 23741da177e4SLinus Torvalds /* check close_lru for replay */ 23751da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 23761da177e4SLinus Torvalds &close->cl_stateid, 23771da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 23781da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23791da177e4SLinus Torvalds goto out; 23801da177e4SLinus Torvalds status = nfs_ok; 23811da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23821da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23831da177e4SLinus Torvalds 238404ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 238504ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 238604ef5954SJ. Bruce Fields 238704ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 238804ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 238904ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 239004ef5954SJ. Bruce Fields */ 239104ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 239204ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23931da177e4SLinus Torvalds out: 2394f2327d9aSNeil Brown if (close->cl_stateowner) { 23951da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2396f2327d9aSNeil Brown *replay_owner = close->cl_stateowner; 2397f2327d9aSNeil Brown } 23981da177e4SLinus Torvalds nfs4_unlock_state(); 23991da177e4SLinus Torvalds return status; 24001da177e4SLinus Torvalds } 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds int 24031da177e4SLinus Torvalds nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 24041da177e4SLinus Torvalds { 24051da177e4SLinus Torvalds int status; 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 24081da177e4SLinus Torvalds goto out; 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds nfs4_lock_state(); 24111da177e4SLinus Torvalds status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 24121da177e4SLinus Torvalds nfs4_unlock_state(); 24131da177e4SLinus Torvalds out: 24141da177e4SLinus Torvalds return status; 24151da177e4SLinus Torvalds } 24161da177e4SLinus Torvalds 24171da177e4SLinus Torvalds 24181da177e4SLinus Torvalds /* 24191da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24201da177e4SLinus Torvalds */ 24211da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24221da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24231da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24241da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24251da177e4SLinus Torvalds 24261da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24271da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24281da177e4SLinus Torvalds 24291da177e4SLinus Torvalds static inline unsigned int 24301da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24311da177e4SLinus Torvalds struct xdr_netobj *ownername) 24321da177e4SLinus Torvalds { 24331da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24341da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24351da177e4SLinus Torvalds & LOCK_HASH_MASK; 24361da177e4SLinus Torvalds } 24371da177e4SLinus Torvalds 24381da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24391da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24401da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24411da177e4SLinus Torvalds 2442fd39ca9aSNeilBrown static struct nfs4_stateid * 24431da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24441da177e4SLinus Torvalds { 24451da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24461da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24471da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24481da177e4SLinus Torvalds unsigned int hashval; 24491da177e4SLinus Torvalds 24501da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24511da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24521da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24531da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24541da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24551da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24561da177e4SLinus Torvalds return local; 24571da177e4SLinus Torvalds } 24581da177e4SLinus Torvalds } 24591da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24601da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24611da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24621da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24631da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24641da177e4SLinus Torvalds return local; 24651da177e4SLinus Torvalds } 2466849823c5SNeil Brown } 24671da177e4SLinus Torvalds return NULL; 24681da177e4SLinus Torvalds } 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds static struct nfs4_delegation * 24711da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24721da177e4SLinus Torvalds { 247313cd2184SNeilBrown struct nfs4_file *fp; 247413cd2184SNeilBrown struct nfs4_delegation *dl; 24751da177e4SLinus Torvalds 24761da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24771da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24781da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24791da177e4SLinus Torvalds 24801da177e4SLinus Torvalds fp = find_file(ino); 248113cd2184SNeilBrown if (!fp) 24821da177e4SLinus Torvalds return NULL; 248313cd2184SNeilBrown dl = find_delegation_file(fp, stid); 248413cd2184SNeilBrown put_nfs4_file(fp); 248513cd2184SNeilBrown return dl; 24861da177e4SLinus Torvalds } 24871da177e4SLinus Torvalds 24881da177e4SLinus Torvalds /* 24891da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24901da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24911da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24921da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24931da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24941da177e4SLinus Torvalds * the VFS, but this is a very deep change! 24951da177e4SLinus Torvalds */ 24961da177e4SLinus Torvalds static inline void 24971da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 24981da177e4SLinus Torvalds { 24991da177e4SLinus Torvalds if (lock->fl_start < 0) 25001da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25011da177e4SLinus Torvalds if (lock->fl_end < 0) 25021da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25031da177e4SLinus Torvalds } 25041da177e4SLinus Torvalds 2505d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2506d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2507e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2508d5b9026aSNeilBrown }; 25091da177e4SLinus Torvalds 25101da177e4SLinus Torvalds static inline void 25111da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25121da177e4SLinus Torvalds { 2513d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2514d5b9026aSNeilBrown unsigned int hval; 25151da177e4SLinus Torvalds 2516d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2517d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2518d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25191da177e4SLinus Torvalds kref_get(&sop->so_ref); 25201da177e4SLinus Torvalds deny->ld_sop = sop; 25211da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2522d5b9026aSNeilBrown } else { 2523d5b9026aSNeilBrown deny->ld_sop = NULL; 2524d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2525d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25261da177e4SLinus Torvalds } 25271da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25281da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25291da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25301da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25311da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25321da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25331da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25341da177e4SLinus Torvalds } 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds static struct nfs4_stateowner * 25371da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25381da177e4SLinus Torvalds struct xdr_netobj *owner) 25391da177e4SLinus Torvalds { 25401da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25411da177e4SLinus Torvalds struct nfs4_stateowner *op; 25421da177e4SLinus Torvalds 25431da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25441da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25451da177e4SLinus Torvalds return op; 25461da177e4SLinus Torvalds } 25471da177e4SLinus Torvalds return NULL; 25481da177e4SLinus Torvalds } 25491da177e4SLinus Torvalds 25501da177e4SLinus Torvalds /* 25511da177e4SLinus Torvalds * Alloc a lock owner structure. 25521da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25531da177e4SLinus Torvalds * occured. 25541da177e4SLinus Torvalds * 25551da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25561da177e4SLinus Torvalds */ 25571da177e4SLinus Torvalds 25581da177e4SLinus Torvalds static struct nfs4_stateowner * 25591da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25601da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25611da177e4SLinus Torvalds struct nfs4_replay *rp; 25621da177e4SLinus Torvalds unsigned int idhashval; 25631da177e4SLinus Torvalds 25641da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25651da177e4SLinus Torvalds return NULL; 25661da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25671da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25681da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25691da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2570ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2571ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25721da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25731da177e4SLinus Torvalds sop->so_time = 0; 25741da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25751da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2576ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25771da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25781da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25791da177e4SLinus Torvalds sop->so_client = clp; 2580b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2581b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2582b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25831da177e4SLinus Torvalds sop->so_confirmed = 1; 25841da177e4SLinus Torvalds rp = &sop->so_replay; 2585de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25861da177e4SLinus Torvalds rp->rp_buflen = 0; 25871da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25881da177e4SLinus Torvalds return sop; 25891da177e4SLinus Torvalds } 25901da177e4SLinus Torvalds 2591fd39ca9aSNeilBrown static struct nfs4_stateid * 25921da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25931da177e4SLinus Torvalds { 25941da177e4SLinus Torvalds struct nfs4_stateid *stp; 25951da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 25961da177e4SLinus Torvalds 25975ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25985ac049acSNeilBrown if (stp == NULL) 25991da177e4SLinus Torvalds goto out; 26001da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26011da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2602ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2603ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26041da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26058beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2606ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26071da177e4SLinus Torvalds stp->st_stateowner = sop; 260813cd2184SNeilBrown get_nfs4_file(fp); 26091da177e4SLinus Torvalds stp->st_file = fp; 26101da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26111da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26121da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26131da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26141da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26151da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26161da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26174c4cd222SNeilBrown stp->st_openstp = open_stp; 26181da177e4SLinus Torvalds 26191da177e4SLinus Torvalds out: 26201da177e4SLinus Torvalds return stp; 26211da177e4SLinus Torvalds } 26221da177e4SLinus Torvalds 2623fd39ca9aSNeilBrown static int 26241da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26251da177e4SLinus Torvalds { 26261da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26271da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26281da177e4SLinus Torvalds } 26291da177e4SLinus Torvalds 26301da177e4SLinus Torvalds /* 26311da177e4SLinus Torvalds * LOCK operation 26321da177e4SLinus Torvalds */ 26331da177e4SLinus Torvalds int 2634f2327d9aSNeil Brown nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) 26351da177e4SLinus Torvalds { 26363e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2637b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26381da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26391da177e4SLinus Torvalds struct file *filp; 26401da177e4SLinus Torvalds struct file_lock file_lock; 26418dc7c311SAndy Adamson struct file_lock conflock; 26421da177e4SLinus Torvalds int status = 0; 26431da177e4SLinus Torvalds unsigned int strhashval; 26441da177e4SLinus Torvalds 26451da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26461da177e4SLinus Torvalds (long long) lock->lk_offset, 26471da177e4SLinus Torvalds (long long) lock->lk_length); 26481da177e4SLinus Torvalds 26491da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26501da177e4SLinus Torvalds return nfserr_inval; 26511da177e4SLinus Torvalds 2652a6f6ef2fSAndy Adamson if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 2653a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2654a6f6ef2fSAndy Adamson return status; 2655a6f6ef2fSAndy Adamson } 2656a6f6ef2fSAndy Adamson 26571da177e4SLinus Torvalds nfs4_lock_state(); 26581da177e4SLinus Torvalds 26591da177e4SLinus Torvalds if (lock->lk_is_new) { 26601da177e4SLinus Torvalds /* 26611da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2662893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2663893f8770SNeilBrown * lock stateid. 26641da177e4SLinus Torvalds */ 26651da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26661da177e4SLinus Torvalds struct nfs4_file *fp; 26671da177e4SLinus Torvalds 26681da177e4SLinus Torvalds status = nfserr_stale_clientid; 2669849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26701da177e4SLinus Torvalds goto out; 26711da177e4SLinus Torvalds 26721da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 26731da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 26741da177e4SLinus Torvalds lock->lk_new_open_seqid, 26751da177e4SLinus Torvalds &lock->lk_new_open_stateid, 26761da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 26773a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2678b59e3c0eSNeil Brown lock); 267937515177SNeilBrown if (status) 26801da177e4SLinus Torvalds goto out; 26813a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26821da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26831da177e4SLinus Torvalds fp = open_stp->st_file; 26841da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26851da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26861da177e4SLinus Torvalds &lock->v.new.owner); 26873e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26883e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26893e9e3dbeSNeilBrown * create new stateids)? */ 26901da177e4SLinus Torvalds status = nfserr_resource; 2691b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2692b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2693b59e3c0eSNeil Brown if (lock_sop == NULL) 26941da177e4SLinus Torvalds goto out; 2695b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 26968a280510SJ. Bruce Fields if (lock_stp == NULL) 26971da177e4SLinus Torvalds goto out; 26981da177e4SLinus Torvalds } else { 26991da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 27001da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 27011da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27021da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27031da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27043a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27051da177e4SLinus Torvalds if (status) 27061da177e4SLinus Torvalds goto out; 27073a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27081da177e4SLinus Torvalds } 27093a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27101da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27111da177e4SLinus Torvalds 27120dd395dcSNeilBrown status = nfserr_grace; 27130dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27140dd395dcSNeilBrown goto out; 27150dd395dcSNeilBrown status = nfserr_no_grace; 27160dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27170dd395dcSNeilBrown goto out; 27180dd395dcSNeilBrown 27191da177e4SLinus Torvalds locks_init_lock(&file_lock); 27201da177e4SLinus Torvalds switch (lock->lk_type) { 27211da177e4SLinus Torvalds case NFS4_READ_LT: 27221da177e4SLinus Torvalds case NFS4_READW_LT: 27231da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 27241da177e4SLinus Torvalds break; 27251da177e4SLinus Torvalds case NFS4_WRITE_LT: 27261da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27271da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 27281da177e4SLinus Torvalds break; 27291da177e4SLinus Torvalds default: 27301da177e4SLinus Torvalds status = nfserr_inval; 27311da177e4SLinus Torvalds goto out; 27321da177e4SLinus Torvalds } 2733b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27341da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27351da177e4SLinus Torvalds file_lock.fl_file = filp; 27361da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2737d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27381da177e4SLinus Torvalds 27391da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27401da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27411da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27421da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27431da177e4SLinus Torvalds else 27441da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27451da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27461da177e4SLinus Torvalds 27471da177e4SLinus Torvalds /* 27481da177e4SLinus Torvalds * Try to lock the file in the VFS. 27491da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27501da177e4SLinus Torvalds */ 27511da177e4SLinus Torvalds 2752eb76b3fdSAndy Adamson /* XXX?: Just to divert the locks_release_private at the start of 2753eb76b3fdSAndy Adamson * locks_copy_lock: */ 2754eb76b3fdSAndy Adamson conflock.fl_ops = NULL; 2755eb76b3fdSAndy Adamson conflock.fl_lmops = NULL; 2756eb76b3fdSAndy Adamson status = posix_lock_file_conf(filp, &file_lock, &conflock); 2757eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); 27581da177e4SLinus Torvalds switch (-status) { 27591da177e4SLinus Torvalds case 0: /* success! */ 27601da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27611da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27621da177e4SLinus Torvalds sizeof(stateid_t)); 2763eb76b3fdSAndy Adamson break; 2764eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2765eb76b3fdSAndy Adamson status = nfserr_denied; 2766eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2767eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2768eb76b3fdSAndy Adamson break; 27691da177e4SLinus Torvalds case (EDEADLK): 27701da177e4SLinus Torvalds status = nfserr_deadlock; 2771eb76b3fdSAndy Adamson break; 27721da177e4SLinus Torvalds default: 2773eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status); 2774eb76b3fdSAndy Adamson status = nfserr_resource; 2775eb76b3fdSAndy Adamson break; 27761da177e4SLinus Torvalds } 27771da177e4SLinus Torvalds out: 27788a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27798a280510SJ. Bruce Fields release_stateowner(lock_sop); 27803a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27813a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 27823a65588aSJ. Bruce Fields *replay_owner = lock->lk_replay_owner; 2783f2327d9aSNeil Brown } 27841da177e4SLinus Torvalds nfs4_unlock_state(); 27851da177e4SLinus Torvalds return status; 27861da177e4SLinus Torvalds } 27871da177e4SLinus Torvalds 27881da177e4SLinus Torvalds /* 27891da177e4SLinus Torvalds * LOCKT operation 27901da177e4SLinus Torvalds */ 27911da177e4SLinus Torvalds int 27921da177e4SLinus Torvalds nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 27931da177e4SLinus Torvalds { 27941da177e4SLinus Torvalds struct inode *inode; 27951da177e4SLinus Torvalds struct file file; 27961da177e4SLinus Torvalds struct file_lock file_lock; 27978dc7c311SAndy Adamson struct file_lock conflock; 27981da177e4SLinus Torvalds int status; 27991da177e4SLinus Torvalds 28001da177e4SLinus Torvalds if (nfs4_in_grace()) 28011da177e4SLinus Torvalds return nfserr_grace; 28021da177e4SLinus Torvalds 28031da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28041da177e4SLinus Torvalds return nfserr_inval; 28051da177e4SLinus Torvalds 28061da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28071da177e4SLinus Torvalds nfs4_lock_state(); 28081da177e4SLinus Torvalds 28091da177e4SLinus Torvalds status = nfserr_stale_clientid; 2810849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28111da177e4SLinus Torvalds goto out; 28121da177e4SLinus Torvalds 28131da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 2814849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28151da177e4SLinus Torvalds if (status == nfserr_symlink) 28161da177e4SLinus Torvalds status = nfserr_inval; 28171da177e4SLinus Torvalds goto out; 28181da177e4SLinus Torvalds } 28191da177e4SLinus Torvalds 28201da177e4SLinus Torvalds inode = current_fh->fh_dentry->d_inode; 28211da177e4SLinus Torvalds locks_init_lock(&file_lock); 28221da177e4SLinus Torvalds switch (lockt->lt_type) { 28231da177e4SLinus Torvalds case NFS4_READ_LT: 28241da177e4SLinus Torvalds case NFS4_READW_LT: 28251da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28261da177e4SLinus Torvalds break; 28271da177e4SLinus Torvalds case NFS4_WRITE_LT: 28281da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28291da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28301da177e4SLinus Torvalds break; 28311da177e4SLinus Torvalds default: 28321da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28331da177e4SLinus Torvalds status = nfserr_inval; 28341da177e4SLinus Torvalds goto out; 28351da177e4SLinus Torvalds } 28361da177e4SLinus Torvalds 28371da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28381da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28391da177e4SLinus Torvalds if (lockt->lt_stateowner) 28401da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28411da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28421da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2843d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28441da177e4SLinus Torvalds 28451da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28461da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28471da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28481da177e4SLinus Torvalds else 28491da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28501da177e4SLinus Torvalds 28511da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28521da177e4SLinus Torvalds 28531da177e4SLinus Torvalds /* posix_test_lock uses the struct file _only_ to resolve the inode. 28541da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 28551da177e4SLinus Torvalds * file may not exist, pass posix_test_lock a struct file with 28561da177e4SLinus Torvalds * only the dentry:inode set. 28571da177e4SLinus Torvalds */ 28581da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 28591da177e4SLinus Torvalds file.f_dentry = current_fh->fh_dentry; 28601da177e4SLinus Torvalds 28611da177e4SLinus Torvalds status = nfs_ok; 28628dc7c311SAndy Adamson if (posix_test_lock(&file, &file_lock, &conflock)) { 28631da177e4SLinus Torvalds status = nfserr_denied; 28648dc7c311SAndy Adamson nfs4_set_lock_denied(&conflock, &lockt->lt_denied); 28651da177e4SLinus Torvalds } 28661da177e4SLinus Torvalds out: 28671da177e4SLinus Torvalds nfs4_unlock_state(); 28681da177e4SLinus Torvalds return status; 28691da177e4SLinus Torvalds } 28701da177e4SLinus Torvalds 28711da177e4SLinus Torvalds int 2872f2327d9aSNeil Brown nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) 28731da177e4SLinus Torvalds { 28741da177e4SLinus Torvalds struct nfs4_stateid *stp; 28751da177e4SLinus Torvalds struct file *filp = NULL; 28761da177e4SLinus Torvalds struct file_lock file_lock; 28771da177e4SLinus Torvalds int status; 28781da177e4SLinus Torvalds 28791da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28801da177e4SLinus Torvalds (long long) locku->lu_offset, 28811da177e4SLinus Torvalds (long long) locku->lu_length); 28821da177e4SLinus Torvalds 28831da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28841da177e4SLinus Torvalds return nfserr_inval; 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds nfs4_lock_state(); 28871da177e4SLinus Torvalds 28881da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, 28891da177e4SLinus Torvalds locku->lu_seqid, 28901da177e4SLinus Torvalds &locku->lu_stateid, 28911da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 28921da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 28931da177e4SLinus Torvalds goto out; 28941da177e4SLinus Torvalds 28951da177e4SLinus Torvalds filp = stp->st_vfs_file; 28961da177e4SLinus Torvalds BUG_ON(!filp); 28971da177e4SLinus Torvalds locks_init_lock(&file_lock); 28981da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 28991da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29001da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29011da177e4SLinus Torvalds file_lock.fl_file = filp; 29021da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2903d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29041da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29051da177e4SLinus Torvalds 29061da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29071da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29081da177e4SLinus Torvalds else 29091da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29101da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29111da177e4SLinus Torvalds 29121da177e4SLinus Torvalds /* 29131da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29141da177e4SLinus Torvalds */ 29151da177e4SLinus Torvalds status = posix_lock_file(filp, &file_lock); 29161da177e4SLinus Torvalds if (status) { 2917849823c5SNeil Brown dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 29181da177e4SLinus Torvalds goto out_nfserr; 29191da177e4SLinus Torvalds } 29201da177e4SLinus Torvalds /* 29211da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29221da177e4SLinus Torvalds */ 29231da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29241da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29251da177e4SLinus Torvalds 29261da177e4SLinus Torvalds out: 2927f2327d9aSNeil Brown if (locku->lu_stateowner) { 29281da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2929f2327d9aSNeil Brown *replay_owner = locku->lu_stateowner; 2930f2327d9aSNeil Brown } 29311da177e4SLinus Torvalds nfs4_unlock_state(); 29321da177e4SLinus Torvalds return status; 29331da177e4SLinus Torvalds 29341da177e4SLinus Torvalds out_nfserr: 29351da177e4SLinus Torvalds status = nfserrno(status); 29361da177e4SLinus Torvalds goto out; 29371da177e4SLinus Torvalds } 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds /* 29401da177e4SLinus Torvalds * returns 29411da177e4SLinus Torvalds * 1: locks held by lockowner 29421da177e4SLinus Torvalds * 0: no locks held by lockowner 29431da177e4SLinus Torvalds */ 29441da177e4SLinus Torvalds static int 29451da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29461da177e4SLinus Torvalds { 29471da177e4SLinus Torvalds struct file_lock **flpp; 29481da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 29491da177e4SLinus Torvalds int status = 0; 29501da177e4SLinus Torvalds 29511da177e4SLinus Torvalds lock_kernel(); 29521da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2953796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29541da177e4SLinus Torvalds status = 1; 29551da177e4SLinus Torvalds goto out; 29561da177e4SLinus Torvalds } 2957796dadfdSJ. Bruce Fields } 29581da177e4SLinus Torvalds out: 29591da177e4SLinus Torvalds unlock_kernel(); 29601da177e4SLinus Torvalds return status; 29611da177e4SLinus Torvalds } 29621da177e4SLinus Torvalds 29631da177e4SLinus Torvalds int 29641da177e4SLinus Torvalds nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 29651da177e4SLinus Torvalds { 29661da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29673e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29683e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29691da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29703e9e3dbeSNeilBrown struct list_head matches; 29713e9e3dbeSNeilBrown int i; 29721da177e4SLinus Torvalds int status; 29731da177e4SLinus Torvalds 29741da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29751da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29761da177e4SLinus Torvalds 29771da177e4SLinus Torvalds /* XXX check for lease expiration */ 29781da177e4SLinus Torvalds 29791da177e4SLinus Torvalds status = nfserr_stale_clientid; 2980849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29811da177e4SLinus Torvalds return status; 29821da177e4SLinus Torvalds 29831da177e4SLinus Torvalds nfs4_lock_state(); 29841da177e4SLinus Torvalds 29851da177e4SLinus Torvalds status = nfserr_locks_held; 29863e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29873e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29883e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29893e9e3dbeSNeilBrown * data structures. */ 29903e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29913e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 29923e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 29933e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 29943e9e3dbeSNeilBrown continue; 29953e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 2996ea1da636SNeilBrown st_perstateowner) { 29973e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 29981da177e4SLinus Torvalds goto out; 29993e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30003e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30013e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30021da177e4SLinus Torvalds } 30033e9e3dbeSNeilBrown } 30043e9e3dbeSNeilBrown } 30053e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30063e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30073e9e3dbeSNeilBrown * have been checked. */ 30081da177e4SLinus Torvalds status = nfs_ok; 30090fa822e4SNeilBrown while (!list_empty(&matches)) { 30100fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30110fa822e4SNeilBrown so_perclient); 30120fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30130fa822e4SNeilBrown * for openowners. */ 30140fa822e4SNeilBrown list_del(&sop->so_perclient); 30153e9e3dbeSNeilBrown release_stateowner(sop); 30161da177e4SLinus Torvalds } 30171da177e4SLinus Torvalds out: 30181da177e4SLinus Torvalds nfs4_unlock_state(); 30191da177e4SLinus Torvalds return status; 30201da177e4SLinus Torvalds } 30211da177e4SLinus Torvalds 30221da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3023a55370a3SNeilBrown alloc_reclaim(void) 30241da177e4SLinus Torvalds { 3025a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30261da177e4SLinus Torvalds } 30271da177e4SLinus Torvalds 3028c7b9a459SNeilBrown int 3029c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3030c7b9a459SNeilBrown { 3031c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3032c7b9a459SNeilBrown struct nfs4_client *clp; 3033c7b9a459SNeilBrown 3034c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3035c7b9a459SNeilBrown return clp ? 1 : 0; 3036c7b9a459SNeilBrown } 3037c7b9a459SNeilBrown 30381da177e4SLinus Torvalds /* 30391da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30401da177e4SLinus Torvalds */ 3041190e4fbfSNeilBrown int 3042190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30431da177e4SLinus Torvalds { 30441da177e4SLinus Torvalds unsigned int strhashval; 30451da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30461da177e4SLinus Torvalds 3047a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3048a55370a3SNeilBrown crp = alloc_reclaim(); 30491da177e4SLinus Torvalds if (!crp) 30501da177e4SLinus Torvalds return 0; 3051a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30521da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30531da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3054a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30551da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30561da177e4SLinus Torvalds return 1; 30571da177e4SLinus Torvalds } 30581da177e4SLinus Torvalds 30591da177e4SLinus Torvalds static void 30601da177e4SLinus Torvalds nfs4_release_reclaim(void) 30611da177e4SLinus Torvalds { 30621da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30631da177e4SLinus Torvalds int i; 30641da177e4SLinus Torvalds 30651da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30661da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30671da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30681da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30691da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30701da177e4SLinus Torvalds kfree(crp); 30711da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30721da177e4SLinus Torvalds } 30731da177e4SLinus Torvalds } 30741da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30751da177e4SLinus Torvalds } 30761da177e4SLinus Torvalds 30771da177e4SLinus Torvalds /* 30781da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3079fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30801da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30811da177e4SLinus Torvalds { 30821da177e4SLinus Torvalds unsigned int strhashval; 30831da177e4SLinus Torvalds struct nfs4_client *clp; 30841da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30851da177e4SLinus Torvalds 30861da177e4SLinus Torvalds 30871da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30881da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30891da177e4SLinus Torvalds if (clp == NULL) 30901da177e4SLinus Torvalds return NULL; 30911da177e4SLinus Torvalds 3092a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3093a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3094a55370a3SNeilBrown clp->cl_recdir); 30951da177e4SLinus Torvalds 30961da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3097a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 30981da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3099a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31001da177e4SLinus Torvalds return crp; 31011da177e4SLinus Torvalds } 31021da177e4SLinus Torvalds } 31031da177e4SLinus Torvalds return NULL; 31041da177e4SLinus Torvalds } 31051da177e4SLinus Torvalds 31061da177e4SLinus Torvalds /* 31071da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31081da177e4SLinus Torvalds */ 31091da177e4SLinus Torvalds int 31101da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31111da177e4SLinus Torvalds { 3112dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds 3115ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31161da177e4SLinus Torvalds 3117ac4d8ff2SNeilBrown void 3118ac4d8ff2SNeilBrown nfs4_state_init(void) 31191da177e4SLinus Torvalds { 31201da177e4SLinus Torvalds int i; 31211da177e4SLinus Torvalds 31221da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31231da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31241da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31251da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31261da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31271da177e4SLinus Torvalds } 31281da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31291da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31301da177e4SLinus Torvalds } 31311da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31321da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31331da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31341da177e4SLinus Torvalds } 31351da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31361da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31401da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31411da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31421da177e4SLinus Torvalds } 31431da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31441da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31451da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31461da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3147ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3148ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3149ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3150ac4d8ff2SNeilBrown } 3151ac4d8ff2SNeilBrown 3152190e4fbfSNeilBrown static void 3153190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3154190e4fbfSNeilBrown { 3155190e4fbfSNeilBrown int status; 3156190e4fbfSNeilBrown 31570964a3d3SNeilBrown nfs4_lock_state(); 31580964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3159190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31600964a3d3SNeilBrown nfs4_unlock_state(); 3161190e4fbfSNeilBrown if (status) 3162190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3163190e4fbfSNeilBrown } 3164190e4fbfSNeilBrown 3165ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3166ac4d8ff2SNeilBrown 3167ac4d8ff2SNeilBrown static void 3168ac4d8ff2SNeilBrown __nfs4_state_start(void) 3169ac4d8ff2SNeilBrown { 3170ac4d8ff2SNeilBrown time_t grace_time; 3171ac4d8ff2SNeilBrown 31721da177e4SLinus Torvalds boot_time = get_seconds(); 3173d99a05adSNeilBrown grace_time = max(user_lease_time, lease_time); 3174d99a05adSNeilBrown lease_time = user_lease_time; 3175a76b4319SNeilBrown in_grace = 1; 31761da177e4SLinus Torvalds printk("NFSD: starting %ld-second grace period\n", grace_time); 317758da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 3178a76b4319SNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); 31791da177e4SLinus Torvalds } 31801da177e4SLinus Torvalds 31811da177e4SLinus Torvalds int 318276a3550eSNeilBrown nfs4_state_start(void) 31831da177e4SLinus Torvalds { 31841da177e4SLinus Torvalds int status; 31851da177e4SLinus Torvalds 31861da177e4SLinus Torvalds if (nfs4_init) 31871da177e4SLinus Torvalds return 0; 31881da177e4SLinus Torvalds status = nfsd4_init_slabs(); 31891da177e4SLinus Torvalds if (status) 31901da177e4SLinus Torvalds return status; 3191190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 319276a3550eSNeilBrown __nfs4_state_start(); 31931da177e4SLinus Torvalds nfs4_init = 1; 31941da177e4SLinus Torvalds return 0; 31951da177e4SLinus Torvalds } 31961da177e4SLinus Torvalds 31971da177e4SLinus Torvalds int 31981da177e4SLinus Torvalds nfs4_in_grace(void) 31991da177e4SLinus Torvalds { 3200a76b4319SNeilBrown return in_grace; 32011da177e4SLinus Torvalds } 32021da177e4SLinus Torvalds 32031da177e4SLinus Torvalds time_t 32041da177e4SLinus Torvalds nfs4_lease_time(void) 32051da177e4SLinus Torvalds { 32061da177e4SLinus Torvalds return lease_time; 32071da177e4SLinus Torvalds } 32081da177e4SLinus Torvalds 32091da177e4SLinus Torvalds static void 32101da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32111da177e4SLinus Torvalds { 32121da177e4SLinus Torvalds int i; 32131da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32141da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32151da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 32161da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32171da177e4SLinus Torvalds 32181da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 32191da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 32201da177e4SLinus Torvalds list_del(&sop->so_close_lru); 32211da177e4SLinus Torvalds nfs4_put_stateowner(sop); 32221da177e4SLinus Torvalds } 32231da177e4SLinus Torvalds 32241da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32251da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32261da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32271da177e4SLinus Torvalds expire_client(clp); 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32301da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32311da177e4SLinus Torvalds expire_client(clp); 32321da177e4SLinus Torvalds } 32331da177e4SLinus Torvalds } 32341da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32351da177e4SLinus Torvalds spin_lock(&recall_lock); 32361da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32371da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32381da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32391da177e4SLinus Torvalds } 32401da177e4SLinus Torvalds spin_unlock(&recall_lock); 32411da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32421da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32431da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32441da177e4SLinus Torvalds unhash_delegation(dp); 32451da177e4SLinus Torvalds } 32461da177e4SLinus Torvalds 32471da177e4SLinus Torvalds cancel_delayed_work(&laundromat_work); 3248190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32491da177e4SLinus Torvalds nfs4_init = 0; 32501da177e4SLinus Torvalds } 32511da177e4SLinus Torvalds 32521da177e4SLinus Torvalds void 32531da177e4SLinus Torvalds nfs4_state_shutdown(void) 32541da177e4SLinus Torvalds { 32555e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 32565e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 32571da177e4SLinus Torvalds nfs4_lock_state(); 32581da177e4SLinus Torvalds nfs4_release_reclaim(); 32591da177e4SLinus Torvalds __nfs4_state_shutdown(); 32601da177e4SLinus Torvalds nfsd4_free_slabs(); 32611da177e4SLinus Torvalds nfs4_unlock_state(); 32621da177e4SLinus Torvalds } 32631da177e4SLinus Torvalds 32640964a3d3SNeilBrown static void 32650964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32660964a3d3SNeilBrown { 32670964a3d3SNeilBrown nfs4_lock_state(); 32680964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32690964a3d3SNeilBrown nfs4_unlock_state(); 32700964a3d3SNeilBrown } 32710964a3d3SNeilBrown 32720964a3d3SNeilBrown /* 32730964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32740964a3d3SNeilBrown */ 32750964a3d3SNeilBrown int 32760964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32770964a3d3SNeilBrown { 32780964a3d3SNeilBrown int status; 32790964a3d3SNeilBrown struct nameidata nd; 32800964a3d3SNeilBrown 32810964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 32820964a3d3SNeilBrown if (status) 32830964a3d3SNeilBrown return status; 32840964a3d3SNeilBrown status = -ENOTDIR; 32850964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 32860964a3d3SNeilBrown nfs4_set_recdir(recdir); 32870964a3d3SNeilBrown status = 0; 32880964a3d3SNeilBrown } 32890964a3d3SNeilBrown path_release(&nd); 32900964a3d3SNeilBrown return status; 32910964a3d3SNeilBrown } 32920964a3d3SNeilBrown 32931da177e4SLinus Torvalds /* 32941da177e4SLinus Torvalds * Called when leasetime is changed. 32951da177e4SLinus Torvalds * 3296d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3297d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3298d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3299d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3300d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33011da177e4SLinus Torvalds */ 33021da177e4SLinus Torvalds void 33031da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33041da177e4SLinus Torvalds { 3305d99a05adSNeilBrown lock_kernel(); 3306d99a05adSNeilBrown user_lease_time = leasetime; 3307d99a05adSNeilBrown unlock_kernel(); 33081da177e4SLinus Torvalds } 3309