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> 521da177e4SLinus Torvalds 531da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 541da177e4SLinus Torvalds 551da177e4SLinus Torvalds /* Globals */ 561da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 57d99a05adSNeilBrown static time_t user_lease_time = 90; 58fd39ca9aSNeilBrown static time_t boot_time; 59a76b4319SNeilBrown static int in_grace = 1; 601da177e4SLinus Torvalds static u32 current_clientid = 1; 611da177e4SLinus Torvalds static u32 current_ownerid = 1; 621da177e4SLinus Torvalds static u32 current_fileid = 1; 631da177e4SLinus Torvalds static u32 current_delegid = 1; 641da177e4SLinus Torvalds static u32 nfs4_init; 65fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 66fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 67fd39ca9aSNeilBrown 68fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 69fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 701da177e4SLinus Torvalds 711da177e4SLinus Torvalds /* forward declarations */ 72fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 731da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 741da177e4SLinus Torvalds static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 750964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 760964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 771da177e4SLinus Torvalds 781da177e4SLinus Torvalds /* Locking: 791da177e4SLinus Torvalds * 801da177e4SLinus Torvalds * client_sema: 811da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 821da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 831da177e4SLinus Torvalds */ 841da177e4SLinus Torvalds static DECLARE_MUTEX(client_sema); 851da177e4SLinus Torvalds 86fd39ca9aSNeilBrown static kmem_cache_t *stateowner_slab = NULL; 87fd39ca9aSNeilBrown static kmem_cache_t *file_slab = NULL; 88fd39ca9aSNeilBrown static kmem_cache_t *stateid_slab = NULL; 89fd39ca9aSNeilBrown static kmem_cache_t *deleg_slab = NULL; 90e60d4398SNeilBrown 911da177e4SLinus Torvalds void 921da177e4SLinus Torvalds nfs4_lock_state(void) 931da177e4SLinus Torvalds { 941da177e4SLinus Torvalds down(&client_sema); 951da177e4SLinus Torvalds } 961da177e4SLinus Torvalds 971da177e4SLinus Torvalds void 981da177e4SLinus Torvalds nfs4_unlock_state(void) 991da177e4SLinus Torvalds { 1001da177e4SLinus Torvalds up(&client_sema); 1011da177e4SLinus Torvalds } 1021da177e4SLinus Torvalds 1031da177e4SLinus Torvalds static inline u32 1041da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1051da177e4SLinus Torvalds { 1061da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1071da177e4SLinus Torvalds 1081da177e4SLinus Torvalds u32 x = 0; 1091da177e4SLinus Torvalds while (nbytes--) { 1101da177e4SLinus Torvalds x *= 37; 1111da177e4SLinus Torvalds x += *cptr++; 1121da177e4SLinus Torvalds } 1131da177e4SLinus Torvalds return x; 1141da177e4SLinus Torvalds } 1151da177e4SLinus Torvalds 1161da177e4SLinus Torvalds /* forward declarations */ 1171da177e4SLinus Torvalds static void release_stateowner(struct nfs4_stateowner *sop); 1181da177e4SLinus Torvalds static void release_stateid(struct nfs4_stateid *stp, int flags); 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* 1211da177e4SLinus Torvalds * Delegation state 1221da177e4SLinus Torvalds */ 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 125fd39ca9aSNeilBrown static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; 1261da177e4SLinus Torvalds static struct list_head del_recall_lru; 1271da177e4SLinus Torvalds 12813cd2184SNeilBrown static void 12913cd2184SNeilBrown free_nfs4_file(struct kref *kref) 13013cd2184SNeilBrown { 13113cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13213cd2184SNeilBrown list_del(&fp->fi_hash); 13313cd2184SNeilBrown iput(fp->fi_inode); 13413cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13513cd2184SNeilBrown } 13613cd2184SNeilBrown 13713cd2184SNeilBrown static inline void 13813cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 13913cd2184SNeilBrown { 14013cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14113cd2184SNeilBrown } 14213cd2184SNeilBrown 14313cd2184SNeilBrown static inline void 14413cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14513cd2184SNeilBrown { 14613cd2184SNeilBrown kref_get(&fi->fi_ref); 14713cd2184SNeilBrown } 14813cd2184SNeilBrown 1491da177e4SLinus Torvalds static struct nfs4_delegation * 1501da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1511da177e4SLinus Torvalds { 1521da177e4SLinus Torvalds struct nfs4_delegation *dp; 1531da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1541da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1551da177e4SLinus Torvalds 1561da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 1575b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 1585b2d21c1SNeilBrown if (dp == NULL) 1591da177e4SLinus Torvalds return dp; 160ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 161ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 1621da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 1631da177e4SLinus Torvalds dp->dl_client = clp; 16413cd2184SNeilBrown get_nfs4_file(fp); 1651da177e4SLinus Torvalds dp->dl_file = fp; 1661da177e4SLinus Torvalds dp->dl_flock = NULL; 1671da177e4SLinus Torvalds get_file(stp->st_vfs_file); 1681da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 1691da177e4SLinus Torvalds dp->dl_type = type; 1701da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 1711da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 1721da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 1731da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 1741da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 1751da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 1761da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 1771da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 1781da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 1791da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 1801da177e4SLinus Torvalds dp->dl_time = 0; 1811da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 182ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 183ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 1841da177e4SLinus Torvalds return dp; 1851da177e4SLinus Torvalds } 1861da177e4SLinus Torvalds 1871da177e4SLinus Torvalds void 1881da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 1891da177e4SLinus Torvalds { 1901da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 1911da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 19213cd2184SNeilBrown put_nfs4_file(dp->dl_file); 1935b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 1941da177e4SLinus Torvalds } 1951da177e4SLinus Torvalds } 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 1981da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 1991da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2001da177e4SLinus Torvalds * fl_release_callback. 2011da177e4SLinus Torvalds */ 2021da177e4SLinus Torvalds static void 2031da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2041da177e4SLinus Torvalds { 2051da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2061da177e4SLinus Torvalds 2071da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2081da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2091da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2101da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 211c907132dSNeilBrown if (dp->dl_flock) 2121da177e4SLinus Torvalds setlease(filp, F_UNLCK, &dp->dl_flock); 2131da177e4SLinus Torvalds nfsd_close(filp); 2141da177e4SLinus Torvalds } 2151da177e4SLinus Torvalds 2161da177e4SLinus Torvalds /* Called under the state lock. */ 2171da177e4SLinus Torvalds static void 2181da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2191da177e4SLinus Torvalds { 220ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 221ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2221da177e4SLinus Torvalds spin_lock(&recall_lock); 2231da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2241da177e4SLinus Torvalds spin_unlock(&recall_lock); 2251da177e4SLinus Torvalds nfs4_close_delegation(dp); 2261da177e4SLinus Torvalds nfs4_put_delegation(dp); 2271da177e4SLinus Torvalds } 2281da177e4SLinus Torvalds 2291da177e4SLinus Torvalds /* 2301da177e4SLinus Torvalds * SETCLIENTID state 2311da177e4SLinus Torvalds */ 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2341da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2351da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2361da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2371da177e4SLinus Torvalds 2381da177e4SLinus Torvalds #define clientid_hashval(id) \ 2391da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 240a55370a3SNeilBrown #define clientstr_hashval(name) \ 241a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2421da177e4SLinus Torvalds /* 2431da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2441da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2451da177e4SLinus Torvalds * 2461da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2471da177e4SLinus Torvalds * setclientid_confirmed info. 2481da177e4SLinus Torvalds * 2491da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2501da177e4SLinus Torvalds * setclientid info. 2511da177e4SLinus Torvalds * 2521da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 2531da177e4SLinus Torvalds * for lease renewal. 2541da177e4SLinus Torvalds * 2551da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 2561da177e4SLinus Torvalds * for last close replay. 2571da177e4SLinus Torvalds */ 2581da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 2591da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 2601da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 2611da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 2621da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 2631da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 2641da177e4SLinus Torvalds static struct list_head client_lru; 2651da177e4SLinus Torvalds static struct list_head close_lru; 2661da177e4SLinus Torvalds 2671da177e4SLinus Torvalds static inline void 2681da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 2691da177e4SLinus Torvalds { 2701da177e4SLinus Torvalds /* 2711da177e4SLinus Torvalds * Move client to the end to the LRU list. 2721da177e4SLinus Torvalds */ 2731da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 2741da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 2751da177e4SLinus Torvalds clp->cl_clientid.cl_id); 2761da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 2771da177e4SLinus Torvalds clp->cl_time = get_seconds(); 2781da177e4SLinus Torvalds } 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 2811da177e4SLinus Torvalds static int 2821da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 2831da177e4SLinus Torvalds { 2841da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 2851da177e4SLinus Torvalds return 0; 2861da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 2871da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 2881da177e4SLinus Torvalds return 1; 2891da177e4SLinus Torvalds } 2901da177e4SLinus Torvalds 2911da177e4SLinus Torvalds /* 2921da177e4SLinus Torvalds * XXX Should we use a slab cache ? 2931da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 2941da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 2951da177e4SLinus Torvalds */ 2961da177e4SLinus Torvalds static inline struct nfs4_client * 2971da177e4SLinus Torvalds alloc_client(struct xdr_netobj name) 2981da177e4SLinus Torvalds { 2991da177e4SLinus Torvalds struct nfs4_client *clp; 3001da177e4SLinus Torvalds 3011da177e4SLinus Torvalds if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { 3021da177e4SLinus Torvalds memset(clp, 0, sizeof(*clp)); 3031da177e4SLinus Torvalds if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { 3041da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3051da177e4SLinus Torvalds clp->cl_name.len = name.len; 3061da177e4SLinus Torvalds } 3071da177e4SLinus Torvalds else { 3081da177e4SLinus Torvalds kfree(clp); 3091da177e4SLinus Torvalds clp = NULL; 3101da177e4SLinus Torvalds } 3111da177e4SLinus Torvalds } 3121da177e4SLinus Torvalds return clp; 3131da177e4SLinus Torvalds } 3141da177e4SLinus Torvalds 3151da177e4SLinus Torvalds static inline void 3161da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3171da177e4SLinus Torvalds { 3181da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3191da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 3201da177e4SLinus Torvalds kfree(clp->cl_name.data); 3211da177e4SLinus Torvalds kfree(clp); 3221da177e4SLinus Torvalds } 3231da177e4SLinus Torvalds 3241da177e4SLinus Torvalds void 3251da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3261da177e4SLinus Torvalds { 3271da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3281da177e4SLinus Torvalds free_client(clp); 3291da177e4SLinus Torvalds } 3301da177e4SLinus Torvalds 3311da177e4SLinus Torvalds static void 3321da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3331da177e4SLinus Torvalds { 3341da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3351da177e4SLinus Torvalds struct nfs4_delegation *dp; 3361da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 3371da177e4SLinus Torvalds struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3381da177e4SLinus Torvalds struct list_head reaplist; 3391da177e4SLinus Torvalds 3401da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 3411da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 3421da177e4SLinus Torvalds 3431da177e4SLinus Torvalds /* shutdown rpc client, ending any outstanding recall rpcs */ 3441da177e4SLinus Torvalds if (atomic_read(&cb->cb_set) == 1 && clnt) { 3451da177e4SLinus Torvalds rpc_shutdown_client(clnt); 3461da177e4SLinus Torvalds clnt = clp->cl_callback.cb_client = NULL; 3471da177e4SLinus Torvalds } 3481da177e4SLinus Torvalds 3491da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 3501da177e4SLinus Torvalds spin_lock(&recall_lock); 351ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 352ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 3531da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 3541da177e4SLinus Torvalds dp->dl_flock); 355ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 3561da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 3571da177e4SLinus Torvalds } 3581da177e4SLinus Torvalds spin_unlock(&recall_lock); 3591da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 3601da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 3611da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 3621da177e4SLinus Torvalds unhash_delegation(dp); 3631da177e4SLinus Torvalds } 3641da177e4SLinus Torvalds list_del(&clp->cl_idhash); 3651da177e4SLinus Torvalds list_del(&clp->cl_strhash); 3661da177e4SLinus Torvalds list_del(&clp->cl_lru); 367ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 368ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 3691da177e4SLinus Torvalds release_stateowner(sop); 3701da177e4SLinus Torvalds } 3711da177e4SLinus Torvalds put_nfs4_client(clp); 3721da177e4SLinus Torvalds } 3731da177e4SLinus Torvalds 3741da177e4SLinus Torvalds static struct nfs4_client * 375a55370a3SNeilBrown create_client(struct xdr_netobj name, char *recdir) { 3761da177e4SLinus Torvalds struct nfs4_client *clp; 3771da177e4SLinus Torvalds 3781da177e4SLinus Torvalds if (!(clp = alloc_client(name))) 3791da177e4SLinus Torvalds goto out; 380a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 3811da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 3821da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 3831da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 3841da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 385ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 386ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 3871da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 3881da177e4SLinus Torvalds out: 3891da177e4SLinus Torvalds return clp; 3901da177e4SLinus Torvalds } 3911da177e4SLinus Torvalds 3921da177e4SLinus Torvalds static void 3931da177e4SLinus Torvalds copy_verf(struct nfs4_client *target, nfs4_verifier *source) { 3941da177e4SLinus Torvalds memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); 3951da177e4SLinus Torvalds } 3961da177e4SLinus Torvalds 3971da177e4SLinus Torvalds static void 3981da177e4SLinus Torvalds copy_clid(struct nfs4_client *target, struct nfs4_client *source) { 3991da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4001da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4011da177e4SLinus Torvalds } 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds static void 4041da177e4SLinus Torvalds copy_cred(struct svc_cred *target, struct svc_cred *source) { 4051da177e4SLinus Torvalds 4061da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4071da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4081da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4091da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4101da177e4SLinus Torvalds } 4111da177e4SLinus Torvalds 412a55370a3SNeilBrown static inline int 413a55370a3SNeilBrown same_name(const char *n1, const char *n2) { 414a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4151da177e4SLinus Torvalds } 4161da177e4SLinus Torvalds 4171da177e4SLinus Torvalds static int 4181da177e4SLinus Torvalds cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { 4191da177e4SLinus Torvalds return(!memcmp(v1->data,v2->data,sizeof(v1->data))); 4201da177e4SLinus Torvalds } 4211da177e4SLinus Torvalds 4221da177e4SLinus Torvalds static int 4231da177e4SLinus Torvalds cmp_clid(clientid_t * cl1, clientid_t * cl2) { 4241da177e4SLinus Torvalds return((cl1->cl_boot == cl2->cl_boot) && 4251da177e4SLinus Torvalds (cl1->cl_id == cl2->cl_id)); 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 4281da177e4SLinus Torvalds /* XXX what about NGROUP */ 4291da177e4SLinus Torvalds static int 4301da177e4SLinus Torvalds cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ 4311da177e4SLinus Torvalds return(cr1->cr_uid == cr2->cr_uid); 4321da177e4SLinus Torvalds 4331da177e4SLinus Torvalds } 4341da177e4SLinus Torvalds 4351da177e4SLinus Torvalds static void 4361da177e4SLinus Torvalds gen_clid(struct nfs4_client *clp) { 4371da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4381da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4391da177e4SLinus Torvalds } 4401da177e4SLinus Torvalds 4411da177e4SLinus Torvalds static void 4421da177e4SLinus Torvalds gen_confirm(struct nfs4_client *clp) { 4431da177e4SLinus Torvalds struct timespec tv; 4441da177e4SLinus Torvalds u32 * p; 4451da177e4SLinus Torvalds 4461da177e4SLinus Torvalds tv = CURRENT_TIME; 4471da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 4481da177e4SLinus Torvalds *p++ = tv.tv_sec; 4491da177e4SLinus Torvalds *p++ = tv.tv_nsec; 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 4521da177e4SLinus Torvalds static int 4531da177e4SLinus Torvalds check_name(struct xdr_netobj name) { 4541da177e4SLinus Torvalds 4551da177e4SLinus Torvalds if (name.len == 0) 4561da177e4SLinus Torvalds return 0; 4571da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 4581da177e4SLinus Torvalds printk("NFSD: check_name: name too long(%d)!\n", name.len); 4591da177e4SLinus Torvalds return 0; 4601da177e4SLinus Torvalds } 4611da177e4SLinus Torvalds return 1; 4621da177e4SLinus Torvalds } 4631da177e4SLinus Torvalds 464fd39ca9aSNeilBrown static void 4651da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 4661da177e4SLinus Torvalds { 4671da177e4SLinus Torvalds unsigned int idhashval; 4681da177e4SLinus Torvalds 4691da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 4701da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4711da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 4721da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 4731da177e4SLinus Torvalds clp->cl_time = get_seconds(); 4741da177e4SLinus Torvalds } 4751da177e4SLinus Torvalds 476fd39ca9aSNeilBrown static void 4771da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 4781da177e4SLinus Torvalds { 4791da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 4801da177e4SLinus Torvalds unsigned int strhashval; 4811da177e4SLinus Torvalds 4821da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 4831da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 4841da177e4SLinus Torvalds list_del_init(&clp->cl_idhash); 4851da177e4SLinus Torvalds list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 486a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 4871da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 4881da177e4SLinus Torvalds renew_client(clp); 4891da177e4SLinus Torvalds } 4901da177e4SLinus Torvalds 4911da177e4SLinus Torvalds static struct nfs4_client * 4921da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 4931da177e4SLinus Torvalds { 4941da177e4SLinus Torvalds struct nfs4_client *clp; 4951da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 4961da177e4SLinus Torvalds 4971da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 4981da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 4991da177e4SLinus Torvalds return clp; 5001da177e4SLinus Torvalds } 5011da177e4SLinus Torvalds return NULL; 5021da177e4SLinus Torvalds } 5031da177e4SLinus Torvalds 5041da177e4SLinus Torvalds static struct nfs4_client * 5051da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5061da177e4SLinus Torvalds { 5071da177e4SLinus Torvalds struct nfs4_client *clp; 5081da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5091da177e4SLinus Torvalds 5101da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 5111da177e4SLinus Torvalds if (cmp_clid(&clp->cl_clientid, clid)) 5121da177e4SLinus Torvalds return clp; 5131da177e4SLinus Torvalds } 5141da177e4SLinus Torvalds return NULL; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds 51728ce6054SNeilBrown static struct nfs4_client * 51828ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 51928ce6054SNeilBrown { 52028ce6054SNeilBrown struct nfs4_client *clp; 52128ce6054SNeilBrown 52228ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 52328ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 52428ce6054SNeilBrown return clp; 52528ce6054SNeilBrown } 52628ce6054SNeilBrown return NULL; 52728ce6054SNeilBrown } 52828ce6054SNeilBrown 52928ce6054SNeilBrown static struct nfs4_client * 53028ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 53128ce6054SNeilBrown { 53228ce6054SNeilBrown struct nfs4_client *clp; 53328ce6054SNeilBrown 53428ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 53528ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 53628ce6054SNeilBrown return clp; 53728ce6054SNeilBrown } 53828ce6054SNeilBrown return NULL; 53928ce6054SNeilBrown } 54028ce6054SNeilBrown 5411da177e4SLinus Torvalds /* a helper function for parse_callback */ 5421da177e4SLinus Torvalds static int 5431da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5441da177e4SLinus Torvalds { 5451da177e4SLinus Torvalds unsigned int len = *lenp; 5461da177e4SLinus Torvalds char *p = *addrp; 5471da177e4SLinus Torvalds int n = -1; 5481da177e4SLinus Torvalds char c; 5491da177e4SLinus Torvalds 5501da177e4SLinus Torvalds for (;;) { 5511da177e4SLinus Torvalds if (!len) 5521da177e4SLinus Torvalds break; 5531da177e4SLinus Torvalds len--; 5541da177e4SLinus Torvalds c = *p++; 5551da177e4SLinus Torvalds if (c == '.') 5561da177e4SLinus Torvalds break; 5571da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 5581da177e4SLinus Torvalds n = -1; 5591da177e4SLinus Torvalds break; 5601da177e4SLinus Torvalds } 5611da177e4SLinus Torvalds if (n < 0) 5621da177e4SLinus Torvalds n = 0; 5631da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 5641da177e4SLinus Torvalds if (n > 255) { 5651da177e4SLinus Torvalds n = -1; 5661da177e4SLinus Torvalds break; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds } 5691da177e4SLinus Torvalds *lenp = len; 5701da177e4SLinus Torvalds *addrp = p; 5711da177e4SLinus Torvalds return n; 5721da177e4SLinus Torvalds } 5731da177e4SLinus Torvalds 5741da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 575fd39ca9aSNeilBrown static int 5761da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 5771da177e4SLinus Torvalds { 5781da177e4SLinus Torvalds int temp = 0; 5791da177e4SLinus Torvalds u32 cbaddr = 0; 5801da177e4SLinus Torvalds u16 cbport = 0; 5811da177e4SLinus Torvalds u32 addrlen = addr_len; 5821da177e4SLinus Torvalds char *addr = addr_val; 5831da177e4SLinus Torvalds int i, shift; 5841da177e4SLinus Torvalds 5851da177e4SLinus Torvalds /* ipaddress */ 5861da177e4SLinus Torvalds shift = 24; 5871da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 5881da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 5891da177e4SLinus Torvalds return 0; 5901da177e4SLinus Torvalds } 5911da177e4SLinus Torvalds cbaddr |= (temp << shift); 5921da177e4SLinus Torvalds if (shift > 0) 5931da177e4SLinus Torvalds shift -= 8; 5941da177e4SLinus Torvalds } 5951da177e4SLinus Torvalds *cbaddrp = cbaddr; 5961da177e4SLinus Torvalds 5971da177e4SLinus Torvalds /* port */ 5981da177e4SLinus Torvalds shift = 8; 5991da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6001da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6011da177e4SLinus Torvalds return 0; 6021da177e4SLinus Torvalds } 6031da177e4SLinus Torvalds cbport |= (temp << shift); 6041da177e4SLinus Torvalds if (shift > 0) 6051da177e4SLinus Torvalds shift -= 8; 6061da177e4SLinus Torvalds } 6071da177e4SLinus Torvalds *cbportp = cbport; 6081da177e4SLinus Torvalds return 1; 6091da177e4SLinus Torvalds } 6101da177e4SLinus Torvalds 611fd39ca9aSNeilBrown static void 6121da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6131da177e4SLinus Torvalds { 6141da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6151da177e4SLinus Torvalds 6161da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6171da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6181da177e4SLinus Torvalds goto out_err; 6191da177e4SLinus Torvalds 6201da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6211da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6221da177e4SLinus Torvalds goto out_err; 6231da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6241da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6251da177e4SLinus Torvalds return; 6261da177e4SLinus Torvalds out_err: 6271da177e4SLinus Torvalds printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6281da177e4SLinus Torvalds "will not receive delegations\n", 6291da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6301da177e4SLinus Torvalds 6311da177e4SLinus Torvalds return; 6321da177e4SLinus Torvalds } 6331da177e4SLinus Torvalds 6341da177e4SLinus Torvalds /* 6351da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 6361da177e4SLinus Torvalds * SETCLIENTID request consisting of 5 bullets, labeled as 6371da177e4SLinus Torvalds * CASE0 - CASE4 below. 6381da177e4SLinus Torvalds * 6391da177e4SLinus Torvalds * NOTES: 6401da177e4SLinus Torvalds * callback information will be processed in a future patch 6411da177e4SLinus Torvalds * 6421da177e4SLinus Torvalds * an unconfirmed record is added when: 6431da177e4SLinus Torvalds * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. 6441da177e4SLinus Torvalds * CASE 1: confirmed record found with matching name, principal, 6451da177e4SLinus Torvalds * verifier, and clientid. 6461da177e4SLinus Torvalds * CASE 2: confirmed record found with matching name, principal, 6471da177e4SLinus Torvalds * and there is no unconfirmed record with matching 6481da177e4SLinus Torvalds * name and principal 6491da177e4SLinus Torvalds * 6501da177e4SLinus Torvalds * an unconfirmed record is replaced when: 6511da177e4SLinus Torvalds * CASE 3: confirmed record found with matching name, principal, 6521da177e4SLinus Torvalds * and an unconfirmed record is found with matching 6531da177e4SLinus Torvalds * name, principal, and with clientid and 6541da177e4SLinus Torvalds * confirm that does not match the confirmed record. 6551da177e4SLinus Torvalds * CASE 4: there is no confirmed record with matching name and 6561da177e4SLinus Torvalds * principal. there is an unconfirmed record with 6571da177e4SLinus Torvalds * matching name, principal. 6581da177e4SLinus Torvalds * 6591da177e4SLinus Torvalds * an unconfirmed record is deleted when: 6601da177e4SLinus Torvalds * CASE 1: an unconfirmed record that matches input name, verifier, 6611da177e4SLinus Torvalds * and confirmed clientid. 6621da177e4SLinus Torvalds * CASE 4: any unconfirmed records with matching name and principal 6631da177e4SLinus Torvalds * that exist after an unconfirmed record has been replaced 6641da177e4SLinus Torvalds * as described above. 6651da177e4SLinus Torvalds * 6661da177e4SLinus Torvalds */ 6671da177e4SLinus Torvalds int 6681da177e4SLinus Torvalds nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) 6691da177e4SLinus Torvalds { 6701da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 6711da177e4SLinus Torvalds struct xdr_netobj clname = { 6721da177e4SLinus Torvalds .len = setclid->se_namelen, 6731da177e4SLinus Torvalds .data = setclid->se_name, 6741da177e4SLinus Torvalds }; 6751da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 6761da177e4SLinus Torvalds unsigned int strhashval; 67728ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 6781da177e4SLinus Torvalds int status; 679a55370a3SNeilBrown char dname[HEXDIR_LEN]; 6801da177e4SLinus Torvalds 6811da177e4SLinus Torvalds status = nfserr_inval; 6821da177e4SLinus Torvalds if (!check_name(clname)) 6831da177e4SLinus Torvalds goto out; 6841da177e4SLinus Torvalds 685a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 686a55370a3SNeilBrown if (status) 687a55370a3SNeilBrown goto out; 688a55370a3SNeilBrown 6891da177e4SLinus Torvalds /* 6901da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 6911da177e4SLinus Torvalds * We get here on a DRC miss. 6921da177e4SLinus Torvalds */ 6931da177e4SLinus Torvalds 694a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 6951da177e4SLinus Torvalds 6961da177e4SLinus Torvalds nfs4_lock_state(); 69728ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 69828ce6054SNeilBrown if (conf) { 6991da177e4SLinus Torvalds /* 7001da177e4SLinus Torvalds * CASE 0: 7011da177e4SLinus Torvalds * clname match, confirmed, different principal 7021da177e4SLinus Torvalds * or different ip_address 7031da177e4SLinus Torvalds */ 7041da177e4SLinus Torvalds status = nfserr_clid_inuse; 70528ce6054SNeilBrown if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) 70628ce6054SNeilBrown || conf->cl_addr != ip_addr) { 7071da177e4SLinus Torvalds printk("NFSD: setclientid: string in use by client" 7081da177e4SLinus Torvalds "(clientid %08x/%08x)\n", 70928ce6054SNeilBrown conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); 7101da177e4SLinus Torvalds goto out; 7111da177e4SLinus Torvalds } 7121da177e4SLinus Torvalds } 71328ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7141da177e4SLinus Torvalds status = nfserr_resource; 7151da177e4SLinus Torvalds if (!conf) { 7161da177e4SLinus Torvalds /* 7171da177e4SLinus Torvalds * CASE 4: 7181da177e4SLinus Torvalds * placed first, because it is the normal case. 7191da177e4SLinus Torvalds */ 7201da177e4SLinus Torvalds if (unconf) 7211da177e4SLinus Torvalds expire_client(unconf); 722a55370a3SNeilBrown new = create_client(clname, dname); 723a55370a3SNeilBrown if (new == NULL) 7241da177e4SLinus Torvalds goto out; 7251da177e4SLinus Torvalds copy_verf(new, &clverifier); 7261da177e4SLinus Torvalds new->cl_addr = ip_addr; 7271da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7281da177e4SLinus Torvalds gen_clid(new); 7291da177e4SLinus Torvalds gen_confirm(new); 7301da177e4SLinus Torvalds gen_callback(new, setclid); 7311da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7321da177e4SLinus Torvalds } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { 7331da177e4SLinus Torvalds /* 7341da177e4SLinus Torvalds * CASE 1: 7351da177e4SLinus Torvalds * cl_name match, confirmed, principal match 7361da177e4SLinus Torvalds * verifier match: probable callback update 7371da177e4SLinus Torvalds * 7381da177e4SLinus Torvalds * remove any unconfirmed nfs4_client with 7391da177e4SLinus Torvalds * matching cl_name, cl_verifier, and cl_clientid 7401da177e4SLinus Torvalds * 7411da177e4SLinus Torvalds * create and insert an unconfirmed nfs4_client with same 7421da177e4SLinus Torvalds * cl_name, cl_verifier, and cl_clientid as existing 7431da177e4SLinus Torvalds * nfs4_client, but with the new callback info and a 7441da177e4SLinus Torvalds * new cl_confirm 7451da177e4SLinus Torvalds */ 74631f4a6c1SNeilBrown if (unconf) { 74731f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 74831f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 74931f4a6c1SNeilBrown * This has the advantage that there is at most 75031f4a6c1SNeilBrown * one {*x***} in either list at any time. 75131f4a6c1SNeilBrown */ 7521da177e4SLinus Torvalds expire_client(unconf); 7531da177e4SLinus Torvalds } 754a55370a3SNeilBrown new = create_client(clname, dname); 755a55370a3SNeilBrown if (new == NULL) 7561da177e4SLinus Torvalds goto out; 7571da177e4SLinus Torvalds copy_verf(new,&conf->cl_verifier); 7581da177e4SLinus Torvalds new->cl_addr = ip_addr; 7591da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7601da177e4SLinus Torvalds copy_clid(new, conf); 7611da177e4SLinus Torvalds gen_confirm(new); 7621da177e4SLinus Torvalds gen_callback(new, setclid); 7631da177e4SLinus Torvalds add_to_unconfirmed(new,strhashval); 7641da177e4SLinus Torvalds } else if (!unconf) { 7651da177e4SLinus Torvalds /* 7661da177e4SLinus Torvalds * CASE 2: 7671da177e4SLinus Torvalds * clname match, confirmed, principal match 7681da177e4SLinus Torvalds * verfier does not match 7691da177e4SLinus Torvalds * no unconfirmed. create a new unconfirmed nfs4_client 7701da177e4SLinus Torvalds * using input clverifier, clname, and callback info 7711da177e4SLinus Torvalds * and generate a new cl_clientid and cl_confirm. 7721da177e4SLinus Torvalds */ 773a55370a3SNeilBrown new = create_client(clname, dname); 774a55370a3SNeilBrown if (new == NULL) 7751da177e4SLinus Torvalds goto out; 7761da177e4SLinus Torvalds copy_verf(new,&clverifier); 7771da177e4SLinus Torvalds new->cl_addr = ip_addr; 7781da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 7791da177e4SLinus Torvalds gen_clid(new); 7801da177e4SLinus Torvalds gen_confirm(new); 7811da177e4SLinus Torvalds gen_callback(new, setclid); 7821da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 7831da177e4SLinus Torvalds } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { 7841da177e4SLinus Torvalds /* 7851da177e4SLinus Torvalds * CASE3: 7861da177e4SLinus Torvalds * confirmed found (name, principal match) 7871da177e4SLinus Torvalds * confirmed verifier does not match input clverifier 7881da177e4SLinus Torvalds * 7891da177e4SLinus Torvalds * unconfirmed found (name match) 7901da177e4SLinus Torvalds * confirmed->cl_confirm != unconfirmed->cl_confirm 7911da177e4SLinus Torvalds * 7921da177e4SLinus Torvalds * remove unconfirmed. 7931da177e4SLinus Torvalds * 7941da177e4SLinus Torvalds * create an unconfirmed nfs4_client 7951da177e4SLinus Torvalds * with same cl_name as existing confirmed nfs4_client, 7961da177e4SLinus Torvalds * but with new callback info, new cl_clientid, 7971da177e4SLinus Torvalds * new cl_verifier and a new cl_confirm 7981da177e4SLinus Torvalds */ 7991da177e4SLinus Torvalds expire_client(unconf); 800a55370a3SNeilBrown new = create_client(clname, dname); 801a55370a3SNeilBrown if (new == NULL) 8021da177e4SLinus Torvalds goto out; 8031da177e4SLinus Torvalds copy_verf(new,&clverifier); 8041da177e4SLinus Torvalds new->cl_addr = ip_addr; 8051da177e4SLinus Torvalds copy_cred(&new->cl_cred,&rqstp->rq_cred); 8061da177e4SLinus Torvalds gen_clid(new); 8071da177e4SLinus Torvalds gen_confirm(new); 8081da177e4SLinus Torvalds gen_callback(new, setclid); 8091da177e4SLinus Torvalds add_to_unconfirmed(new, strhashval); 8101da177e4SLinus Torvalds } else { 8111da177e4SLinus Torvalds /* No cases hit !!! */ 8121da177e4SLinus Torvalds status = nfserr_inval; 8131da177e4SLinus Torvalds goto out; 8141da177e4SLinus Torvalds 8151da177e4SLinus Torvalds } 8161da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8171da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8181da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8191da177e4SLinus Torvalds status = nfs_ok; 8201da177e4SLinus Torvalds out: 8211da177e4SLinus Torvalds nfs4_unlock_state(); 8221da177e4SLinus Torvalds return status; 8231da177e4SLinus Torvalds } 8241da177e4SLinus Torvalds 8251da177e4SLinus Torvalds 8261da177e4SLinus Torvalds /* 8271da177e4SLinus Torvalds * RFC 3010 has a complex implmentation description of processing a 8281da177e4SLinus Torvalds * SETCLIENTID_CONFIRM request consisting of 4 bullets describing 8291da177e4SLinus Torvalds * processing on a DRC miss, labeled as CASE1 - CASE4 below. 8301da177e4SLinus Torvalds * 8311da177e4SLinus Torvalds * NOTE: callback information will be processed here in a future patch 8321da177e4SLinus Torvalds */ 8331da177e4SLinus Torvalds int 8341da177e4SLinus Torvalds nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) 8351da177e4SLinus Torvalds { 8361da177e4SLinus Torvalds u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; 83721ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8381da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8391da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 8401da177e4SLinus Torvalds int status; 8411da177e4SLinus Torvalds 8421da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8431da177e4SLinus Torvalds return nfserr_stale_clientid; 8441da177e4SLinus Torvalds /* 8451da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8461da177e4SLinus Torvalds * We get here on a DRC miss. 8471da177e4SLinus Torvalds */ 8481da177e4SLinus Torvalds 8491da177e4SLinus Torvalds nfs4_lock_state(); 85021ab45a4SNeilBrown 85121ab45a4SNeilBrown conf = find_confirmed_client(clid); 85221ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 85321ab45a4SNeilBrown 85422de4d83SNeilBrown status = nfserr_clid_inuse; 85521ab45a4SNeilBrown if (conf && conf->cl_addr != ip_addr) 8561da177e4SLinus Torvalds goto out; 85721ab45a4SNeilBrown if (unconf && unconf->cl_addr != ip_addr) 8581da177e4SLinus Torvalds goto out; 85921ab45a4SNeilBrown 8601da177e4SLinus Torvalds if ((conf && unconf) && 8611da177e4SLinus Torvalds (cmp_verf(&unconf->cl_confirm, &confirm)) && 8621da177e4SLinus Torvalds (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && 863a55370a3SNeilBrown (same_name(conf->cl_recdir,unconf->cl_recdir)) && 8641da177e4SLinus Torvalds (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { 8657c79f737SNeilBrown /* CASE 1: 8667c79f737SNeilBrown * unconf record that matches input clientid and input confirm. 8677c79f737SNeilBrown * conf record that matches input clientid. 8687c79f737SNeilBrown * conf and unconf records match names, verifiers 8697c79f737SNeilBrown */ 8701da177e4SLinus Torvalds if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) 8711da177e4SLinus Torvalds status = nfserr_clid_inuse; 8721da177e4SLinus Torvalds else { 8731a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 8741a69c179SNeilBrown * change request correctly. */ 875cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 87621ab45a4SNeilBrown gen_confirm(conf); 87746309029SNeilBrown nfsd4_remove_clid_dir(unconf); 8781a69c179SNeilBrown expire_client(unconf); 8791da177e4SLinus Torvalds status = nfs_ok; 8801a69c179SNeilBrown 8811da177e4SLinus Torvalds } 8827c79f737SNeilBrown } else if ((conf && !unconf) || 8831da177e4SLinus Torvalds ((conf && unconf) && 8841da177e4SLinus Torvalds (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || 885a55370a3SNeilBrown !same_name(conf->cl_recdir, unconf->cl_recdir)))) { 8867c79f737SNeilBrown /* CASE 2: 8877c79f737SNeilBrown * conf record that matches input clientid. 8887c79f737SNeilBrown * if unconf record matches input clientid, then 8897c79f737SNeilBrown * unconf->cl_name or unconf->cl_verifier don't match the 8907c79f737SNeilBrown * conf record. 8917c79f737SNeilBrown */ 89221ab45a4SNeilBrown if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) 8931da177e4SLinus Torvalds status = nfserr_clid_inuse; 89421ab45a4SNeilBrown else 8951da177e4SLinus Torvalds status = nfs_ok; 8967c79f737SNeilBrown } else if (!conf && unconf 8977c79f737SNeilBrown && cmp_verf(&unconf->cl_confirm, &confirm)) { 8981da177e4SLinus Torvalds /* CASE 3: 8991da177e4SLinus Torvalds * conf record not found. 9001da177e4SLinus Torvalds * unconf record found. 9011da177e4SLinus Torvalds * unconf->cl_confirm matches input confirm 9021da177e4SLinus Torvalds */ 9031da177e4SLinus Torvalds if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 9041da177e4SLinus Torvalds status = nfserr_clid_inuse; 9051da177e4SLinus Torvalds } else { 9061a69c179SNeilBrown unsigned int hash = 9071a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 9081a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 9091a69c179SNeilBrown hash); 9101a69c179SNeilBrown if (conf) { 911c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 9121a69c179SNeilBrown expire_client(conf); 9131a69c179SNeilBrown } 9141da177e4SLinus Torvalds move_to_confirmed(unconf); 91521ab45a4SNeilBrown conf = unconf; 9161a69c179SNeilBrown status = nfs_ok; 9171da177e4SLinus Torvalds } 9187c79f737SNeilBrown } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) 9197c79f737SNeilBrown && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, 9207c79f737SNeilBrown &confirm)))) { 9211da177e4SLinus Torvalds /* CASE 4: 9227c79f737SNeilBrown * conf record not found, or if conf, conf->cl_confirm does not 9231da177e4SLinus Torvalds * match input confirm. 9247c79f737SNeilBrown * unconf record not found, or if unconf, unconf->cl_confirm 9251da177e4SLinus Torvalds * does not match input confirm. 9261da177e4SLinus Torvalds */ 9271da177e4SLinus Torvalds status = nfserr_stale_clientid; 9287c79f737SNeilBrown } else { 9291da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 93022de4d83SNeilBrown status = nfserr_clid_inuse; 93108e8987cSNeilBrown } 9321da177e4SLinus Torvalds out: 9331da177e4SLinus Torvalds if (!status) 93421ab45a4SNeilBrown nfsd4_probe_callback(conf); 9351da177e4SLinus Torvalds nfs4_unlock_state(); 9361da177e4SLinus Torvalds return status; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds /* 9401da177e4SLinus Torvalds * Open owner state (share locks) 9411da177e4SLinus Torvalds */ 9421da177e4SLinus Torvalds 9431da177e4SLinus Torvalds /* hash tables for nfs4_stateowner */ 9441da177e4SLinus Torvalds #define OWNER_HASH_BITS 8 9451da177e4SLinus Torvalds #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 9461da177e4SLinus Torvalds #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 9471da177e4SLinus Torvalds 9481da177e4SLinus Torvalds #define ownerid_hashval(id) \ 9491da177e4SLinus Torvalds ((id) & OWNER_HASH_MASK) 9501da177e4SLinus Torvalds #define ownerstr_hashval(clientid, ownername) \ 9511da177e4SLinus Torvalds (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 9521da177e4SLinus Torvalds 9531da177e4SLinus Torvalds static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 9541da177e4SLinus Torvalds static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 9551da177e4SLinus Torvalds 9561da177e4SLinus Torvalds /* hash table for nfs4_file */ 9571da177e4SLinus Torvalds #define FILE_HASH_BITS 8 9581da177e4SLinus Torvalds #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 9591da177e4SLinus Torvalds #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 9601da177e4SLinus Torvalds /* hash table for (open)nfs4_stateid */ 9611da177e4SLinus Torvalds #define STATEID_HASH_BITS 10 9621da177e4SLinus Torvalds #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 9631da177e4SLinus Torvalds #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 9641da177e4SLinus Torvalds 9651da177e4SLinus Torvalds #define file_hashval(x) \ 9661da177e4SLinus Torvalds hash_ptr(x, FILE_HASH_BITS) 9671da177e4SLinus Torvalds #define stateid_hashval(owner_id, file_id) \ 9681da177e4SLinus Torvalds (((owner_id) + (file_id)) & STATEID_HASH_MASK) 9691da177e4SLinus Torvalds 9701da177e4SLinus Torvalds static struct list_head file_hashtbl[FILE_HASH_SIZE]; 9711da177e4SLinus Torvalds static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 9721da177e4SLinus Torvalds 9731da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9741da177e4SLinus Torvalds static inline struct nfs4_file * 9751da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9761da177e4SLinus Torvalds { 9771da177e4SLinus Torvalds struct nfs4_file *fp; 9781da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9791da177e4SLinus Torvalds 980e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 981e60d4398SNeilBrown if (fp) { 98213cd2184SNeilBrown kref_init(&fp->fi_ref); 9831da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9848beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9858beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9861da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9871da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9881da177e4SLinus Torvalds fp->fi_id = current_fileid++; 9891da177e4SLinus Torvalds return fp; 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds return NULL; 9921da177e4SLinus Torvalds } 9931da177e4SLinus Torvalds 9941da177e4SLinus Torvalds static void 995e60d4398SNeilBrown nfsd4_free_slab(kmem_cache_t **slab) 996e60d4398SNeilBrown { 997e60d4398SNeilBrown int status; 998e60d4398SNeilBrown 999e60d4398SNeilBrown if (*slab == NULL) 1000e60d4398SNeilBrown return; 1001e60d4398SNeilBrown status = kmem_cache_destroy(*slab); 1002e60d4398SNeilBrown *slab = NULL; 1003e60d4398SNeilBrown WARN_ON(status); 1004e60d4398SNeilBrown } 1005e60d4398SNeilBrown 1006e60d4398SNeilBrown static void 1007e60d4398SNeilBrown nfsd4_free_slabs(void) 1008e60d4398SNeilBrown { 1009e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 1010e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 10115ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 10125b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 1013e60d4398SNeilBrown } 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds static int 10161da177e4SLinus Torvalds nfsd4_init_slabs(void) 10171da177e4SLinus Torvalds { 10181da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 10191da177e4SLinus Torvalds sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); 1020e60d4398SNeilBrown if (stateowner_slab == NULL) 1021e60d4398SNeilBrown goto out_nomem; 1022e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 1023e60d4398SNeilBrown sizeof(struct nfs4_file), 0, 0, NULL, NULL); 1024e60d4398SNeilBrown if (file_slab == NULL) 1025e60d4398SNeilBrown goto out_nomem; 10265ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 10275ac049acSNeilBrown sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); 10285ac049acSNeilBrown if (stateid_slab == NULL) 10295ac049acSNeilBrown goto out_nomem; 10305b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 10315b2d21c1SNeilBrown sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); 10325b2d21c1SNeilBrown if (deleg_slab == NULL) 10335b2d21c1SNeilBrown goto out_nomem; 1034e60d4398SNeilBrown return 0; 1035e60d4398SNeilBrown out_nomem: 1036e60d4398SNeilBrown nfsd4_free_slabs(); 10371da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 10381da177e4SLinus Torvalds return -ENOMEM; 10391da177e4SLinus Torvalds } 10401da177e4SLinus Torvalds 10411da177e4SLinus Torvalds void 10421da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 10431da177e4SLinus Torvalds { 10441da177e4SLinus Torvalds struct nfs4_stateowner *sop = 10451da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 10461da177e4SLinus Torvalds kfree(sop->so_owner.data); 10471da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10481da177e4SLinus Torvalds } 10491da177e4SLinus Torvalds 10501da177e4SLinus Torvalds static inline struct nfs4_stateowner * 10511da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 10521da177e4SLinus Torvalds { 10531da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10541da177e4SLinus Torvalds 10551da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 10561da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 10571da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10581da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10591da177e4SLinus Torvalds kref_init(&sop->so_ref); 10601da177e4SLinus Torvalds return sop; 10611da177e4SLinus Torvalds } 10621da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10631da177e4SLinus Torvalds } 10641da177e4SLinus Torvalds return NULL; 10651da177e4SLinus Torvalds } 10661da177e4SLinus Torvalds 10671da177e4SLinus Torvalds static struct nfs4_stateowner * 10681da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10691da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10701da177e4SLinus Torvalds struct nfs4_replay *rp; 10711da177e4SLinus Torvalds unsigned int idhashval; 10721da177e4SLinus Torvalds 10731da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10741da177e4SLinus Torvalds return NULL; 10751da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10761da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10771da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10781da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1079ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1080ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10811da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10821da177e4SLinus Torvalds sop->so_time = 0; 10831da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10841da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1085ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10861da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10871da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10881da177e4SLinus Torvalds sop->so_client = clp; 10891da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10901da177e4SLinus Torvalds sop->so_confirmed = 0; 10911da177e4SLinus Torvalds rp = &sop->so_replay; 10921da177e4SLinus Torvalds rp->rp_status = NFSERR_SERVERFAULT; 10931da177e4SLinus Torvalds rp->rp_buflen = 0; 10941da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 10951da177e4SLinus Torvalds return sop; 10961da177e4SLinus Torvalds } 10971da177e4SLinus Torvalds 10981da177e4SLinus Torvalds static void 10991da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 11001da177e4SLinus Torvalds { 11011da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 11021da177e4SLinus Torvalds 1103ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1104ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1105ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1106ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 11071da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 11081da177e4SLinus Torvalds release_stateowner(lock_sop); 11091da177e4SLinus Torvalds } 11101da177e4SLinus Torvalds } 11111da177e4SLinus Torvalds 11121da177e4SLinus Torvalds static void 11131da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 11141da177e4SLinus Torvalds { 11151da177e4SLinus Torvalds struct nfs4_stateid *stp; 11161da177e4SLinus Torvalds 11171da177e4SLinus Torvalds list_del(&sop->so_idhash); 11181da177e4SLinus Torvalds list_del(&sop->so_strhash); 11196fa305deSNeilBrown if (sop->so_is_open_owner) 11201da177e4SLinus Torvalds list_del(&sop->so_perclient); 1121ea1da636SNeilBrown list_del(&sop->so_perstateid); 1122ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1123ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1124ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 11251da177e4SLinus Torvalds if (sop->so_is_open_owner) 11261da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 11271da177e4SLinus Torvalds else 11281da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 11291da177e4SLinus Torvalds } 11301da177e4SLinus Torvalds } 11311da177e4SLinus Torvalds 11321da177e4SLinus Torvalds static void 11331da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 11341da177e4SLinus Torvalds { 11351da177e4SLinus Torvalds unhash_stateowner(sop); 11361da177e4SLinus Torvalds list_del(&sop->so_close_lru); 11371da177e4SLinus Torvalds nfs4_put_stateowner(sop); 11381da177e4SLinus Torvalds } 11391da177e4SLinus Torvalds 11401da177e4SLinus Torvalds static inline void 11411da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 11421da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 11431da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 11441da177e4SLinus Torvalds 11451da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1146ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1147ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 11481da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 11491da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1150ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 11518beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 11521da177e4SLinus Torvalds stp->st_stateowner = sop; 115313cd2184SNeilBrown get_nfs4_file(fp); 11541da177e4SLinus Torvalds stp->st_file = fp; 11551da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 11561da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 11571da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11581da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11591da177e4SLinus Torvalds stp->st_access_bmap = 0; 11601da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11611da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11621da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11631da177e4SLinus Torvalds } 11641da177e4SLinus Torvalds 11651da177e4SLinus Torvalds static void 11661da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11671da177e4SLinus Torvalds { 11681da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11691da177e4SLinus Torvalds 11701da177e4SLinus Torvalds list_del(&stp->st_hash); 11711da177e4SLinus Torvalds list_del(&stp->st_perfile); 1172ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11731da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11741da177e4SLinus Torvalds release_stateid_lockowners(stp); 11751da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11761da177e4SLinus Torvalds nfsd_close(filp); 11771da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11781da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 117913cd2184SNeilBrown put_nfs4_file(stp->st_file); 11805ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11811da177e4SLinus Torvalds stp = NULL; 11821da177e4SLinus Torvalds } 11831da177e4SLinus Torvalds 1184fd39ca9aSNeilBrown static void 11851da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11861da177e4SLinus Torvalds { 11871da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11881da177e4SLinus Torvalds 11891da177e4SLinus Torvalds unhash_stateowner(sop); 11901da177e4SLinus Torvalds list_add_tail(&sop->so_close_lru, &close_lru); 11911da177e4SLinus Torvalds sop->so_time = get_seconds(); 11921da177e4SLinus Torvalds } 11931da177e4SLinus Torvalds 1194fd39ca9aSNeilBrown static void 11951da177e4SLinus Torvalds release_state_owner(struct nfs4_stateid *stp, int flag) 11961da177e4SLinus Torvalds { 11971da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 11981da177e4SLinus Torvalds 11991da177e4SLinus Torvalds dprintk("NFSD: release_state_owner\n"); 12001da177e4SLinus Torvalds release_stateid(stp, flag); 12011da177e4SLinus Torvalds 12021da177e4SLinus Torvalds /* place unused nfs4_stateowners on so_close_lru list to be 12031da177e4SLinus Torvalds * released by the laundromat service after the lease period 12041da177e4SLinus Torvalds * to enable us to handle CLOSE replay 12051da177e4SLinus Torvalds */ 1206ea1da636SNeilBrown if (sop->so_confirmed && list_empty(&sop->so_stateids)) 12071da177e4SLinus Torvalds move_to_close_lru(sop); 12081da177e4SLinus Torvalds } 12091da177e4SLinus Torvalds 12101da177e4SLinus Torvalds static int 12111da177e4SLinus Torvalds cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { 12121da177e4SLinus Torvalds return ((sop->so_owner.len == owner->len) && 12131da177e4SLinus Torvalds !memcmp(sop->so_owner.data, owner->data, owner->len) && 12141da177e4SLinus Torvalds (sop->so_client->cl_clientid.cl_id == clid->cl_id)); 12151da177e4SLinus Torvalds } 12161da177e4SLinus Torvalds 12171da177e4SLinus Torvalds static struct nfs4_stateowner * 12181da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 12191da177e4SLinus Torvalds { 12201da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 12211da177e4SLinus Torvalds 12221da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 12231da177e4SLinus Torvalds if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) 12241da177e4SLinus Torvalds return so; 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds return NULL; 12271da177e4SLinus Torvalds } 12281da177e4SLinus Torvalds 12291da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 12301da177e4SLinus Torvalds static struct nfs4_file * 12311da177e4SLinus Torvalds find_file(struct inode *ino) 12321da177e4SLinus Torvalds { 12331da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 12341da177e4SLinus Torvalds struct nfs4_file *fp; 12351da177e4SLinus Torvalds 12361da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 123713cd2184SNeilBrown if (fp->fi_inode == ino) { 123813cd2184SNeilBrown get_nfs4_file(fp); 12391da177e4SLinus Torvalds return fp; 12401da177e4SLinus Torvalds } 124113cd2184SNeilBrown } 12421da177e4SLinus Torvalds return NULL; 12431da177e4SLinus Torvalds } 12441da177e4SLinus Torvalds 12451da177e4SLinus Torvalds #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) 12461da177e4SLinus Torvalds #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) 12471da177e4SLinus Torvalds 1248fd39ca9aSNeilBrown static void 12491da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12501da177e4SLinus Torvalds int i; 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds *access = 0; 12531da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12541da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12551da177e4SLinus Torvalds *access |= i; 12561da177e4SLinus Torvalds } 12571da177e4SLinus Torvalds } 12581da177e4SLinus Torvalds 1259fd39ca9aSNeilBrown static void 12601da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12611da177e4SLinus Torvalds int i; 12621da177e4SLinus Torvalds 12631da177e4SLinus Torvalds *deny = 0; 12641da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12651da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12661da177e4SLinus Torvalds *deny |= i ; 12671da177e4SLinus Torvalds } 12681da177e4SLinus Torvalds } 12691da177e4SLinus Torvalds 12701da177e4SLinus Torvalds static int 12711da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12721da177e4SLinus Torvalds unsigned int access, deny; 12731da177e4SLinus Torvalds 12741da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12751da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12761da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12771da177e4SLinus Torvalds return 0; 12781da177e4SLinus Torvalds return 1; 12791da177e4SLinus Torvalds } 12801da177e4SLinus Torvalds 12811da177e4SLinus Torvalds /* 12821da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12831da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12841da177e4SLinus Torvalds */ 1285fd39ca9aSNeilBrown static int 12861da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12871da177e4SLinus Torvalds { 12881da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12891da177e4SLinus Torvalds struct nfs4_file *fp; 12901da177e4SLinus Torvalds struct nfs4_stateid *stp; 129113cd2184SNeilBrown int ret; 12921da177e4SLinus Torvalds 12931da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12941da177e4SLinus Torvalds 12951da177e4SLinus Torvalds fp = find_file(ino); 129613cd2184SNeilBrown if (!fp) 129713cd2184SNeilBrown return nfs_ok; 1298b700949bSNeilBrown ret = nfserr_locked; 12991da177e4SLinus Torvalds /* Search for conflicting share reservations */ 13008beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 13011da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 13021da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 130313cd2184SNeilBrown goto out; 13041da177e4SLinus Torvalds } 130513cd2184SNeilBrown ret = nfs_ok; 130613cd2184SNeilBrown out: 130713cd2184SNeilBrown put_nfs4_file(fp); 130813cd2184SNeilBrown return ret; 13091da177e4SLinus Torvalds } 13101da177e4SLinus Torvalds 13111da177e4SLinus Torvalds static inline void 13121da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 13131da177e4SLinus Torvalds { 13141da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 13151da177e4SLinus Torvalds put_write_access(filp->f_dentry->d_inode); 13161da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 13171da177e4SLinus Torvalds } 13181da177e4SLinus Torvalds } 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds /* 13211da177e4SLinus Torvalds * Recall a delegation 13221da177e4SLinus Torvalds */ 13231da177e4SLinus Torvalds static int 13241da177e4SLinus Torvalds do_recall(void *__dp) 13251da177e4SLinus Torvalds { 13261da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 13271da177e4SLinus Torvalds 13281da177e4SLinus Torvalds daemonize("nfsv4-recall"); 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds nfsd4_cb_recall(dp); 13311da177e4SLinus Torvalds return 0; 13321da177e4SLinus Torvalds } 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds /* 13351da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 13361da177e4SLinus Torvalds * by the lease (file_lock) 13371da177e4SLinus Torvalds * 13381da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 13391da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 13401da177e4SLinus Torvalds * lease. 13411da177e4SLinus Torvalds */ 13421da177e4SLinus Torvalds static 13431da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13441da177e4SLinus Torvalds { 13451da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13461da177e4SLinus Torvalds struct task_struct *t; 13471da177e4SLinus Torvalds 13481da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13491da177e4SLinus Torvalds if (!dp) 13501da177e4SLinus Torvalds return; 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13531da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13541da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13551da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13561da177e4SLinus Torvalds * it's safe to take a reference: */ 13571da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds spin_lock(&recall_lock); 13601da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13611da177e4SLinus Torvalds spin_unlock(&recall_lock); 13621da177e4SLinus Torvalds 13631da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13641da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13651da177e4SLinus Torvalds 13661da177e4SLinus Torvalds /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ 13671da177e4SLinus Torvalds fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13701da177e4SLinus Torvalds if (IS_ERR(t)) { 13711da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13721da177e4SLinus Torvalds 13731da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13741da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13751da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 13761da177e4SLinus Torvalds nfs4_put_delegation(dp); 13771da177e4SLinus Torvalds } 13781da177e4SLinus Torvalds } 13791da177e4SLinus Torvalds 13801da177e4SLinus Torvalds /* 13811da177e4SLinus Torvalds * The file_lock is being reapd. 13821da177e4SLinus Torvalds * 13831da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13841da177e4SLinus Torvalds */ 13851da177e4SLinus Torvalds static 13861da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13871da177e4SLinus Torvalds { 13881da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13891da177e4SLinus Torvalds 13901da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13931da177e4SLinus Torvalds return; 13941da177e4SLinus Torvalds dp->dl_flock = NULL; 13951da177e4SLinus Torvalds } 13961da177e4SLinus Torvalds 13971da177e4SLinus Torvalds /* 13981da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13991da177e4SLinus Torvalds * 14001da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held. 14011da177e4SLinus Torvalds */ 14021da177e4SLinus Torvalds static 14031da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 14041da177e4SLinus Torvalds { 14051da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 14061da177e4SLinus Torvalds 14071da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 14081da177e4SLinus Torvalds if (!dp) 14091da177e4SLinus Torvalds return; 14101da177e4SLinus Torvalds dp->dl_flock = new; 14111da177e4SLinus Torvalds } 14121da177e4SLinus Torvalds 14131da177e4SLinus Torvalds /* 14141da177e4SLinus Torvalds * Called from __setlease() with lock_kernel() held 14151da177e4SLinus Torvalds */ 14161da177e4SLinus Torvalds static 14171da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 14181da177e4SLinus Torvalds { 14191da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 14201da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 14211da177e4SLinus Torvalds struct nfs4_delegation *tryd = 14221da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 14231da177e4SLinus Torvalds 14241da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 14251da177e4SLinus Torvalds return 0; 14261da177e4SLinus Torvalds 14271da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 14281da177e4SLinus Torvalds } 14291da177e4SLinus Torvalds 14301da177e4SLinus Torvalds 14311da177e4SLinus Torvalds static 14321da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 14331da177e4SLinus Torvalds { 14341da177e4SLinus Torvalds if (arg & F_UNLCK) 14351da177e4SLinus Torvalds return lease_modify(onlist, arg); 14361da177e4SLinus Torvalds else 14371da177e4SLinus Torvalds return -EAGAIN; 14381da177e4SLinus Torvalds } 14391da177e4SLinus Torvalds 1440fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14411da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14421da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14431da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14441da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14451da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14461da177e4SLinus Torvalds }; 14471da177e4SLinus Torvalds 14481da177e4SLinus Torvalds 14491da177e4SLinus Torvalds /* 14501da177e4SLinus Torvalds * nfsd4_process_open1() 14511da177e4SLinus Torvalds * lookup stateowner. 14521da177e4SLinus Torvalds * found: 14531da177e4SLinus Torvalds * check confirmed 14541da177e4SLinus Torvalds * confirmed: 14551da177e4SLinus Torvalds * check seqid 14561da177e4SLinus Torvalds * not confirmed: 14571da177e4SLinus Torvalds * delete owner 14581da177e4SLinus Torvalds * create new owner 14591da177e4SLinus Torvalds * notfound: 14601da177e4SLinus Torvalds * verify clientid 14611da177e4SLinus Torvalds * create new owner 14621da177e4SLinus Torvalds * 14631da177e4SLinus Torvalds * called with nfs4_lock_state() held. 14641da177e4SLinus Torvalds */ 14651da177e4SLinus Torvalds int 14661da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14671da177e4SLinus Torvalds { 14681da177e4SLinus Torvalds int status; 14691da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14701da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14711da177e4SLinus Torvalds unsigned int strhashval; 14721da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14731da177e4SLinus Torvalds 14741da177e4SLinus Torvalds status = nfserr_inval; 14751da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14761da177e4SLinus Torvalds goto out; 14771da177e4SLinus Torvalds 14781da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14791da177e4SLinus Torvalds return nfserr_stale_clientid; 14801da177e4SLinus Torvalds 14811da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14821da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14831da177e4SLinus Torvalds if (sop) { 14841da177e4SLinus Torvalds open->op_stateowner = sop; 14851da177e4SLinus Torvalds /* check for replay */ 1486bd9aac52SNeilBrown if (open->op_seqid == sop->so_seqid - 1){ 14871da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 14881da177e4SLinus Torvalds return NFSERR_REPLAY_ME; 14891da177e4SLinus Torvalds else { 14901da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14911da177e4SLinus Torvalds * that we don't even have replay data saved! 14921da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14931da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14941da177e4SLinus Torvalds * fail again for the same reason. 14951da177e4SLinus Torvalds */ 14961da177e4SLinus Torvalds dprintk("nfsd4_process_open1:" 14971da177e4SLinus Torvalds " replay with no replay cache\n"); 14981da177e4SLinus Torvalds goto renew; 14991da177e4SLinus Torvalds } 15001da177e4SLinus Torvalds } else if (sop->so_confirmed) { 1501bd9aac52SNeilBrown if (open->op_seqid == sop->so_seqid) 15021da177e4SLinus Torvalds goto renew; 15031da177e4SLinus Torvalds status = nfserr_bad_seqid; 15041da177e4SLinus Torvalds goto out; 15051da177e4SLinus Torvalds } else { 15061da177e4SLinus Torvalds /* If we get here, we received an OPEN for an 15071da177e4SLinus Torvalds * unconfirmed nfs4_stateowner. Since the seqid's are 15081da177e4SLinus Torvalds * different, purge the existing nfs4_stateowner, and 15091da177e4SLinus Torvalds * instantiate a new one. 15101da177e4SLinus Torvalds */ 15111da177e4SLinus Torvalds clp = sop->so_client; 15121da177e4SLinus Torvalds release_stateowner(sop); 15131da177e4SLinus Torvalds } 15141da177e4SLinus Torvalds } else { 15151da177e4SLinus Torvalds /* nfs4_stateowner not found. 15161da177e4SLinus Torvalds * Verify clientid and instantiate new nfs4_stateowner. 15171da177e4SLinus Torvalds * If verify fails this is presumably the result of the 15181da177e4SLinus Torvalds * client's lease expiring. 15191da177e4SLinus Torvalds */ 15201da177e4SLinus Torvalds status = nfserr_expired; 15211da177e4SLinus Torvalds clp = find_confirmed_client(clientid); 15221da177e4SLinus Torvalds if (clp == NULL) 15231da177e4SLinus Torvalds goto out; 15241da177e4SLinus Torvalds } 15251da177e4SLinus Torvalds status = nfserr_resource; 15261da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 15271da177e4SLinus Torvalds if (sop == NULL) 15281da177e4SLinus Torvalds goto out; 15291da177e4SLinus Torvalds open->op_stateowner = sop; 15301da177e4SLinus Torvalds renew: 15311da177e4SLinus Torvalds status = nfs_ok; 15321da177e4SLinus Torvalds renew_client(sop->so_client); 15331da177e4SLinus Torvalds out: 15341da177e4SLinus Torvalds return status; 15351da177e4SLinus Torvalds } 15361da177e4SLinus Torvalds 15374a6e43e6SNeilBrown static inline int 15384a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 15394a6e43e6SNeilBrown { 15404a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 15414a6e43e6SNeilBrown return nfserr_openmode; 15424a6e43e6SNeilBrown else 15434a6e43e6SNeilBrown return nfs_ok; 15444a6e43e6SNeilBrown } 15454a6e43e6SNeilBrown 154652f4fb43SNeilBrown static struct nfs4_delegation * 154752f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 154852f4fb43SNeilBrown { 154952f4fb43SNeilBrown struct nfs4_delegation *dp; 155052f4fb43SNeilBrown 1551ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 155252f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 155352f4fb43SNeilBrown return dp; 155452f4fb43SNeilBrown } 155552f4fb43SNeilBrown return NULL; 155652f4fb43SNeilBrown } 155752f4fb43SNeilBrown 1558c44c5eebSNeilBrown static int 1559567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1560567d9829SNeilBrown struct nfs4_delegation **dp) 1561567d9829SNeilBrown { 1562567d9829SNeilBrown int flags; 1563c44c5eebSNeilBrown int status = nfserr_bad_stateid; 1564567d9829SNeilBrown 1565567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1566567d9829SNeilBrown if (*dp == NULL) 1567c44c5eebSNeilBrown goto out; 1568567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1569567d9829SNeilBrown RD_STATE : WR_STATE; 1570567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1571567d9829SNeilBrown if (status) 1572567d9829SNeilBrown *dp = NULL; 1573c44c5eebSNeilBrown out: 1574c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1575c44c5eebSNeilBrown return nfs_ok; 1576c44c5eebSNeilBrown if (status) 1577c44c5eebSNeilBrown return status; 1578c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1579c44c5eebSNeilBrown return nfs_ok; 1580567d9829SNeilBrown } 1581567d9829SNeilBrown 15821da177e4SLinus Torvalds static int 15831da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15841da177e4SLinus Torvalds { 15851da177e4SLinus Torvalds struct nfs4_stateid *local; 15861da177e4SLinus Torvalds int status = nfserr_share_denied; 15871da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15881da177e4SLinus Torvalds 15898beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15901da177e4SLinus Torvalds /* ignore lock owners */ 15911da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15921da177e4SLinus Torvalds continue; 15931da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15941da177e4SLinus Torvalds if (local->st_stateowner == sop) 15951da177e4SLinus Torvalds *stpp = local; 15961da177e4SLinus Torvalds /* check for conflicting share reservations */ 15971da177e4SLinus Torvalds if (!test_share(local, open)) 15981da177e4SLinus Torvalds goto out; 15991da177e4SLinus Torvalds } 16001da177e4SLinus Torvalds status = 0; 16011da177e4SLinus Torvalds out: 16021da177e4SLinus Torvalds return status; 16031da177e4SLinus Torvalds } 16041da177e4SLinus Torvalds 16055ac049acSNeilBrown static inline struct nfs4_stateid * 16065ac049acSNeilBrown nfs4_alloc_stateid(void) 16075ac049acSNeilBrown { 16085ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 16095ac049acSNeilBrown } 16105ac049acSNeilBrown 16111da177e4SLinus Torvalds static int 16121da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1613567d9829SNeilBrown struct nfs4_delegation *dp, 16141da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 16151da177e4SLinus Torvalds { 16161da177e4SLinus Torvalds struct nfs4_stateid *stp; 16171da177e4SLinus Torvalds 16185ac049acSNeilBrown stp = nfs4_alloc_stateid(); 16191da177e4SLinus Torvalds if (stp == NULL) 16201da177e4SLinus Torvalds return nfserr_resource; 16211da177e4SLinus Torvalds 1622567d9829SNeilBrown if (dp) { 1623567d9829SNeilBrown get_file(dp->dl_vfs_file); 1624567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1625567d9829SNeilBrown } else { 1626567d9829SNeilBrown int status; 1627567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1628567d9829SNeilBrown &stp->st_vfs_file); 16291da177e4SLinus Torvalds if (status) { 16301da177e4SLinus Torvalds if (status == nfserr_dropit) 16311da177e4SLinus Torvalds status = nfserr_jukebox; 16325ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 16331da177e4SLinus Torvalds return status; 16341da177e4SLinus Torvalds } 1635567d9829SNeilBrown } 16361da177e4SLinus Torvalds *stpp = stp; 16371da177e4SLinus Torvalds return 0; 16381da177e4SLinus Torvalds } 16391da177e4SLinus Torvalds 16401da177e4SLinus Torvalds static inline int 16411da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 16421da177e4SLinus Torvalds struct nfsd4_open *open) 16431da177e4SLinus Torvalds { 16441da177e4SLinus Torvalds struct iattr iattr = { 16451da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 16461da177e4SLinus Torvalds .ia_size = 0, 16471da177e4SLinus Torvalds }; 16481da177e4SLinus Torvalds if (!open->op_truncate) 16491da177e4SLinus Torvalds return 0; 16501da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 16511da177e4SLinus Torvalds return -EINVAL; 16521da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 16531da177e4SLinus Torvalds } 16541da177e4SLinus Torvalds 16551da177e4SLinus Torvalds static int 16561da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 16571da177e4SLinus Torvalds { 16581da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 16591da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 16601da177e4SLinus Torvalds unsigned int share_access; 16611da177e4SLinus Torvalds int status; 16621da177e4SLinus Torvalds 16631da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 16641da177e4SLinus Torvalds share_access = ~share_access; 16651da177e4SLinus Torvalds share_access &= open->op_share_access; 16661da177e4SLinus Torvalds 16671da177e4SLinus Torvalds if (!(share_access & NFS4_SHARE_ACCESS_WRITE)) 16681da177e4SLinus Torvalds return nfsd4_truncate(rqstp, cur_fh, open); 16691da177e4SLinus Torvalds 16701da177e4SLinus Torvalds status = get_write_access(inode); 16711da177e4SLinus Torvalds if (status) 16721da177e4SLinus Torvalds return nfserrno(status); 16731da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16741da177e4SLinus Torvalds if (status) { 16751da177e4SLinus Torvalds put_write_access(inode); 16761da177e4SLinus Torvalds return status; 16771da177e4SLinus Torvalds } 16781da177e4SLinus Torvalds /* remember the open */ 16791da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ; 16801da177e4SLinus Torvalds set_bit(open->op_share_access, &stp->st_access_bmap); 16811da177e4SLinus Torvalds set_bit(open->op_share_deny, &stp->st_deny_bmap); 16821da177e4SLinus Torvalds 16831da177e4SLinus Torvalds return nfs_ok; 16841da177e4SLinus Torvalds } 16851da177e4SLinus Torvalds 16861da177e4SLinus Torvalds 16871da177e4SLinus Torvalds static void 168837515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16891da177e4SLinus Torvalds { 16901da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1691c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16921da177e4SLinus Torvalds } 16931da177e4SLinus Torvalds 16941da177e4SLinus Torvalds /* 16951da177e4SLinus Torvalds * Attempt to hand out a delegation. 16961da177e4SLinus Torvalds */ 16971da177e4SLinus Torvalds static void 16981da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16991da177e4SLinus Torvalds { 17001da177e4SLinus Torvalds struct nfs4_delegation *dp; 17011da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 17021da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 17031da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 17041da177e4SLinus Torvalds int status, flag = 0; 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17077b190fecSNeilBrown open->op_recall = 0; 17087b190fecSNeilBrown switch (open->op_claim_type) { 17097b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 17107b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 17117b190fecSNeilBrown open->op_recall = 1; 17127b190fecSNeilBrown flag = open->op_delegate_type; 17137b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 17141da177e4SLinus Torvalds goto out; 17157b190fecSNeilBrown break; 17167b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 17177b190fecSNeilBrown /* Let's not give out any delegations till everyone's 17187b190fecSNeilBrown * had the chance to reclaim theirs.... */ 17197b190fecSNeilBrown if (nfs4_in_grace()) 17207b190fecSNeilBrown goto out; 17217b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 17227b190fecSNeilBrown goto out; 17231da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17241da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 17251da177e4SLinus Torvalds else 17261da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 17277b190fecSNeilBrown break; 17287b190fecSNeilBrown default: 17297b190fecSNeilBrown goto out; 17307b190fecSNeilBrown } 17311da177e4SLinus Torvalds 17321da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 17331da177e4SLinus Torvalds if (dp == NULL) { 17341da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17351da177e4SLinus Torvalds goto out; 17361da177e4SLinus Torvalds } 17371da177e4SLinus Torvalds locks_init_lock(&fl); 17381da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 17391da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 17401da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 17411da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 17421da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 17431da177e4SLinus Torvalds fl.fl_pid = current->tgid; 17441da177e4SLinus Torvalds 17451da177e4SLinus Torvalds /* setlease checks to see if delegation should be handed out. 17461da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 17471da177e4SLinus Torvalds */ 17481da177e4SLinus Torvalds if ((status = setlease(stp->st_vfs_file, 17491da177e4SLinus Torvalds flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { 17501da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1751c907132dSNeilBrown unhash_delegation(dp); 17521da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 17531da177e4SLinus Torvalds goto out; 17541da177e4SLinus Torvalds } 17551da177e4SLinus Torvalds 17561da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 17571da177e4SLinus Torvalds 17581da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 17591da177e4SLinus Torvalds dp->dl_stateid.si_boot, 17601da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 17611da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 17621da177e4SLinus Torvalds dp->dl_stateid.si_generation); 17631da177e4SLinus Torvalds out: 17647b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17657b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17667b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17677b190fecSNeilBrown printk("NFSD: WARNING: refusing delegation reclaim\n"); 17681da177e4SLinus Torvalds open->op_delegate_type = flag; 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds 17711da177e4SLinus Torvalds /* 17721da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17731da177e4SLinus Torvalds */ 17741da177e4SLinus Torvalds int 17751da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17761da177e4SLinus Torvalds { 17771da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17781da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17791da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1780567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 17811da177e4SLinus Torvalds int status; 17821da177e4SLinus Torvalds 1783b648330aSNeilBrown if (nfs4_in_grace() && open->op_claim_type != NFS4_OPEN_CLAIM_PREVIOUS) 1784b648330aSNeilBrown return nfserr_grace; 1785b648330aSNeilBrown 1786b648330aSNeilBrown if (!nfs4_in_grace() && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 1787b648330aSNeilBrown return nfserr_no_grace; 1788b648330aSNeilBrown 17891da177e4SLinus Torvalds status = nfserr_inval; 17901da177e4SLinus Torvalds if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) 17911da177e4SLinus Torvalds goto out; 17921da177e4SLinus Torvalds /* 17931da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17941da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17951da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17961da177e4SLinus Torvalds */ 17971da177e4SLinus Torvalds fp = find_file(ino); 17981da177e4SLinus Torvalds if (fp) { 17991da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 18001da177e4SLinus Torvalds goto out; 1801c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1802c44c5eebSNeilBrown if (status) 1803c44c5eebSNeilBrown goto out; 18041da177e4SLinus Torvalds } else { 1805c44c5eebSNeilBrown status = nfserr_bad_stateid; 1806c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1807c44c5eebSNeilBrown goto out; 18081da177e4SLinus Torvalds status = nfserr_resource; 18091da177e4SLinus Torvalds fp = alloc_init_file(ino); 18101da177e4SLinus Torvalds if (fp == NULL) 18111da177e4SLinus Torvalds goto out; 18121da177e4SLinus Torvalds } 18131da177e4SLinus Torvalds 18141da177e4SLinus Torvalds /* 18151da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 18161da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 18171da177e4SLinus Torvalds */ 18181da177e4SLinus Torvalds if (stp) { 18191da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 18201da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 18211da177e4SLinus Torvalds if (status) 18221da177e4SLinus Torvalds goto out; 1823444c2c07SNeilBrown update_stateid(&stp->st_stateid); 18241da177e4SLinus Torvalds } else { 18251da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 18261da177e4SLinus Torvalds int flags = 0; 18271da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 18281da177e4SLinus Torvalds flags = MAY_WRITE; 18291da177e4SLinus Torvalds else 18301da177e4SLinus Torvalds flags = MAY_READ; 1831567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1832567d9829SNeilBrown if (status) 18331da177e4SLinus Torvalds goto out; 18341da177e4SLinus Torvalds init_stateid(stp, fp, open); 18351da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 18361da177e4SLinus Torvalds if (status) { 18371da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 18381da177e4SLinus Torvalds goto out; 18391da177e4SLinus Torvalds } 18401da177e4SLinus Torvalds } 18411da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 18421da177e4SLinus Torvalds 18431da177e4SLinus Torvalds /* 18441da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 18451da177e4SLinus Torvalds * OPEN succeeds even if we fail. 18461da177e4SLinus Torvalds */ 18471da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 18481da177e4SLinus Torvalds 18491da177e4SLinus Torvalds status = nfs_ok; 18501da177e4SLinus Torvalds 18511da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 18521da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 18531da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 18541da177e4SLinus Torvalds out: 185513cd2184SNeilBrown if (fp) 185613cd2184SNeilBrown put_nfs4_file(fp); 185737515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 185837515177SNeilBrown nfs4_set_claim_prev(open); 18591da177e4SLinus Torvalds /* 18601da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 18611da177e4SLinus Torvalds */ 18621da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 18631da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 18641da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 18651da177e4SLinus Torvalds 18661da177e4SLinus Torvalds return status; 18671da177e4SLinus Torvalds } 18681da177e4SLinus Torvalds 186958da282bSNeilBrown static struct workqueue_struct *laundry_wq; 18701da177e4SLinus Torvalds static struct work_struct laundromat_work; 18711da177e4SLinus Torvalds static void laundromat_main(void *); 18721da177e4SLinus Torvalds static DECLARE_WORK(laundromat_work, laundromat_main, NULL); 18731da177e4SLinus Torvalds 18741da177e4SLinus Torvalds int 18751da177e4SLinus Torvalds nfsd4_renew(clientid_t *clid) 18761da177e4SLinus Torvalds { 18771da177e4SLinus Torvalds struct nfs4_client *clp; 18781da177e4SLinus Torvalds int status; 18791da177e4SLinus Torvalds 18801da177e4SLinus Torvalds nfs4_lock_state(); 18811da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18821da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18831da177e4SLinus Torvalds status = nfserr_stale_clientid; 18841da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18851da177e4SLinus Torvalds goto out; 18861da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18871da177e4SLinus Torvalds status = nfserr_expired; 18881da177e4SLinus Torvalds if (clp == NULL) { 18891da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18901da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18911da177e4SLinus Torvalds goto out; 18921da177e4SLinus Torvalds } 18931da177e4SLinus Torvalds renew_client(clp); 18941da177e4SLinus Torvalds status = nfserr_cb_path_down; 1895ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18961da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18971da177e4SLinus Torvalds goto out; 18981da177e4SLinus Torvalds status = nfs_ok; 18991da177e4SLinus Torvalds out: 19001da177e4SLinus Torvalds nfs4_unlock_state(); 19011da177e4SLinus Torvalds return status; 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds 1904a76b4319SNeilBrown static void 1905a76b4319SNeilBrown end_grace(void) 1906a76b4319SNeilBrown { 1907a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1908c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1909a76b4319SNeilBrown in_grace = 0; 1910a76b4319SNeilBrown } 1911a76b4319SNeilBrown 1912fd39ca9aSNeilBrown static time_t 19131da177e4SLinus Torvalds nfs4_laundromat(void) 19141da177e4SLinus Torvalds { 19151da177e4SLinus Torvalds struct nfs4_client *clp; 19161da177e4SLinus Torvalds struct nfs4_stateowner *sop; 19171da177e4SLinus Torvalds struct nfs4_delegation *dp; 19181da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 19191da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 19201da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 19211da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 19221da177e4SLinus Torvalds 19231da177e4SLinus Torvalds nfs4_lock_state(); 19241da177e4SLinus Torvalds 19251da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1926a76b4319SNeilBrown if (in_grace) 1927a76b4319SNeilBrown end_grace(); 19281da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 19291da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 19301da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 19311da177e4SLinus Torvalds t = clp->cl_time - cutoff; 19321da177e4SLinus Torvalds if (clientid_val > t) 19331da177e4SLinus Torvalds clientid_val = t; 19341da177e4SLinus Torvalds break; 19351da177e4SLinus Torvalds } 19361da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 19371da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1938c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 19391da177e4SLinus Torvalds expire_client(clp); 19401da177e4SLinus Torvalds } 19411da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 19421da177e4SLinus Torvalds spin_lock(&recall_lock); 19431da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 19441da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19451da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 19461da177e4SLinus Torvalds u = dp->dl_time - cutoff; 19471da177e4SLinus Torvalds if (test_val > u) 19481da177e4SLinus Torvalds test_val = u; 19491da177e4SLinus Torvalds break; 19501da177e4SLinus Torvalds } 19511da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 19521da177e4SLinus Torvalds dp, dp->dl_flock); 19531da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 19541da177e4SLinus Torvalds } 19551da177e4SLinus Torvalds spin_unlock(&recall_lock); 19561da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 19571da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 19581da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 19591da177e4SLinus Torvalds unhash_delegation(dp); 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 19621da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 19631da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 19641da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 19651da177e4SLinus Torvalds u = sop->so_time - cutoff; 19661da177e4SLinus Torvalds if (test_val > u) 19671da177e4SLinus Torvalds test_val = u; 19681da177e4SLinus Torvalds break; 19691da177e4SLinus Torvalds } 19701da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19711da177e4SLinus Torvalds sop->so_id); 19721da177e4SLinus Torvalds list_del(&sop->so_close_lru); 19731da177e4SLinus Torvalds nfs4_put_stateowner(sop); 19741da177e4SLinus Torvalds } 19751da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19761da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19771da177e4SLinus Torvalds nfs4_unlock_state(); 19781da177e4SLinus Torvalds return clientid_val; 19791da177e4SLinus Torvalds } 19801da177e4SLinus Torvalds 19811da177e4SLinus Torvalds void 19821da177e4SLinus Torvalds laundromat_main(void *not_used) 19831da177e4SLinus Torvalds { 19841da177e4SLinus Torvalds time_t t; 19851da177e4SLinus Torvalds 19861da177e4SLinus Torvalds t = nfs4_laundromat(); 19871da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 198858da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19891da177e4SLinus Torvalds } 19901da177e4SLinus Torvalds 1991fd39ca9aSNeilBrown static struct nfs4_stateowner * 1992f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1993f8816512SNeilBrown { 19941da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19951da177e4SLinus Torvalds 19961da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19971da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19981da177e4SLinus Torvalds if (local->so_id == st_id) 19991da177e4SLinus Torvalds return local; 20001da177e4SLinus Torvalds } 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds return NULL; 20031da177e4SLinus Torvalds } 20041da177e4SLinus Torvalds 20051da177e4SLinus Torvalds static inline int 20061da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 20071da177e4SLinus Torvalds { 20081da177e4SLinus Torvalds return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; 20091da177e4SLinus Torvalds } 20101da177e4SLinus Torvalds 20111da177e4SLinus Torvalds static int 20121da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 20131da177e4SLinus Torvalds { 20141da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 20151da177e4SLinus Torvalds return 0; 20161da177e4SLinus Torvalds printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 20171da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 20181da177e4SLinus Torvalds stateid->si_generation); 20191da177e4SLinus Torvalds return 1; 20201da177e4SLinus Torvalds } 20211da177e4SLinus Torvalds 20221da177e4SLinus Torvalds static inline int 20231da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 20241da177e4SLinus Torvalds { 20251da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 20261da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 20271da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 20281da177e4SLinus Torvalds } 20291da177e4SLinus Torvalds 20301da177e4SLinus Torvalds static inline int 20311da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 20321da177e4SLinus Torvalds { 20331da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 20341da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 20351da177e4SLinus Torvalds } 20361da177e4SLinus Torvalds 20371da177e4SLinus Torvalds static 20381da177e4SLinus Torvalds int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 20391da177e4SLinus Torvalds { 20401da177e4SLinus Torvalds int status = nfserr_openmode; 20411da177e4SLinus Torvalds 20421da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 20431da177e4SLinus Torvalds goto out; 20441da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 20451da177e4SLinus Torvalds goto out; 20461da177e4SLinus Torvalds status = nfs_ok; 20471da177e4SLinus Torvalds out: 20481da177e4SLinus Torvalds return status; 20491da177e4SLinus Torvalds } 20501da177e4SLinus Torvalds 20511da177e4SLinus Torvalds static inline int 20521da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 20531da177e4SLinus Torvalds { 20541da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 20551da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 20561da177e4SLinus Torvalds return nfserr_bad_stateid; 20571da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 20581da177e4SLinus Torvalds return nfs_ok; 20591da177e4SLinus Torvalds else if (nfs4_in_grace()) { 20601da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 20611da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 20621da177e4SLinus Torvalds return nfserr_grace; 20631da177e4SLinus Torvalds } else if (flags & WR_STATE) 20641da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20651da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 20661da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 20671da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20681da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds 20711da177e4SLinus Torvalds /* 20721da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20731da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20741da177e4SLinus Torvalds */ 20751da177e4SLinus Torvalds static inline int 20761da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20771da177e4SLinus Torvalds { 20781da177e4SLinus Torvalds return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) 20791da177e4SLinus Torvalds && MANDATORY_LOCK(inode); 20801da177e4SLinus Torvalds } 20811da177e4SLinus Torvalds 20821da177e4SLinus Torvalds /* 20831da177e4SLinus Torvalds * Checks for stateid operations 20841da177e4SLinus Torvalds */ 20851da177e4SLinus Torvalds int 20861da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20871da177e4SLinus Torvalds { 20881da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20891da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20901da177e4SLinus Torvalds stateid_t *stidp; 20911da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 20921da177e4SLinus Torvalds int status; 20931da177e4SLinus Torvalds 20941da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20951da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20961da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20971da177e4SLinus Torvalds if (filpp) 20981da177e4SLinus Torvalds *filpp = NULL; 20991da177e4SLinus Torvalds 21001da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 21011da177e4SLinus Torvalds return nfserr_grace; 21021da177e4SLinus Torvalds 21031da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 21041da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 21051da177e4SLinus Torvalds 21061da177e4SLinus Torvalds /* STALE STATEID */ 21071da177e4SLinus Torvalds status = nfserr_stale_stateid; 21081da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21091da177e4SLinus Torvalds goto out; 21101da177e4SLinus Torvalds 21111da177e4SLinus Torvalds /* BAD STATEID */ 21121da177e4SLinus Torvalds status = nfserr_bad_stateid; 21131da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 21141da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 21151da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 21161da177e4SLinus Torvalds if (nfs4_in_grace()) 21171da177e4SLinus Torvalds status = nfserr_grace; 21181da177e4SLinus Torvalds goto out; 21191da177e4SLinus Torvalds } 21201da177e4SLinus Torvalds stidp = &dp->dl_stateid; 21211da177e4SLinus Torvalds } else { /* open or lock stateid */ 21221da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 21231da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 21241da177e4SLinus Torvalds if (nfs4_in_grace()) 21251da177e4SLinus Torvalds status = nfserr_grace; 21261da177e4SLinus Torvalds goto out; 21271da177e4SLinus Torvalds } 21281da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 21291da177e4SLinus Torvalds goto out; 21301da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 21311da177e4SLinus Torvalds goto out; 21321da177e4SLinus Torvalds stidp = &stp->st_stateid; 21331da177e4SLinus Torvalds } 21341da177e4SLinus Torvalds if (stateid->si_generation > stidp->si_generation) 21351da177e4SLinus Torvalds goto out; 21361da177e4SLinus Torvalds 21371da177e4SLinus Torvalds /* OLD STATEID */ 21381da177e4SLinus Torvalds status = nfserr_old_stateid; 21391da177e4SLinus Torvalds if (stateid->si_generation < stidp->si_generation) 21401da177e4SLinus Torvalds goto out; 21411da177e4SLinus Torvalds if (stp) { 21421da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 21431da177e4SLinus Torvalds goto out; 21441da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 21451da177e4SLinus Torvalds if (filpp) 21461da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 21471da177e4SLinus Torvalds } else if (dp) { 21481da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 21491da177e4SLinus Torvalds goto out; 21501da177e4SLinus Torvalds renew_client(dp->dl_client); 21511da177e4SLinus Torvalds if (flags & DELEG_RET) 21521da177e4SLinus Torvalds unhash_delegation(dp); 21531da177e4SLinus Torvalds if (filpp) 21541da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 21551da177e4SLinus Torvalds } 21561da177e4SLinus Torvalds status = nfs_ok; 21571da177e4SLinus Torvalds out: 21581da177e4SLinus Torvalds return status; 21591da177e4SLinus Torvalds } 21601da177e4SLinus Torvalds 21611da177e4SLinus Torvalds 21621da177e4SLinus Torvalds /* 21631da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21641da177e4SLinus Torvalds */ 2165fd39ca9aSNeilBrown static int 21661da177e4SLinus Torvalds nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid) 21671da177e4SLinus Torvalds { 21681da177e4SLinus Torvalds int status; 21691da177e4SLinus Torvalds struct nfs4_stateid *stp; 21701da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21711da177e4SLinus Torvalds 21721da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21731da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21741da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21751da177e4SLinus Torvalds stateid->si_generation); 21761da177e4SLinus Torvalds 21771da177e4SLinus Torvalds *stpp = NULL; 21781da177e4SLinus Torvalds *sopp = NULL; 21791da177e4SLinus Torvalds 21801da177e4SLinus Torvalds status = nfserr_bad_stateid; 21811da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21821da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21831da177e4SLinus Torvalds goto out; 21841da177e4SLinus Torvalds } 21851da177e4SLinus Torvalds 21861da177e4SLinus Torvalds status = nfserr_stale_stateid; 21871da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21881da177e4SLinus Torvalds goto out; 21891da177e4SLinus Torvalds /* 21901da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21911da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21921da177e4SLinus Torvalds * number is incorrect. 21931da177e4SLinus Torvalds */ 2194f8816512SNeilBrown stp = find_stateid(stateid, flags); 2195f8816512SNeilBrown if (stp == NULL) { 2196f8816512SNeilBrown /* 2197f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2198f8816512SNeilBrown * a replayed close: 2199f8816512SNeilBrown */ 2200f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2201f8816512SNeilBrown if (sop == NULL) 2202f8816512SNeilBrown return nfserr_bad_stateid; 2203f8816512SNeilBrown *sopp = sop; 2204f8816512SNeilBrown goto check_replay; 2205f8816512SNeilBrown } 22061da177e4SLinus Torvalds 22071da177e4SLinus Torvalds status = nfserr_bad_stateid; 22081da177e4SLinus Torvalds 22091da177e4SLinus Torvalds /* for new lock stateowners: 22101da177e4SLinus Torvalds * check that the lock->v.new.open_stateid 22111da177e4SLinus Torvalds * refers to an open stateowner 22121da177e4SLinus Torvalds * 22131da177e4SLinus Torvalds * check that the lockclid (nfs4_lock->v.new.clientid) is the same 22141da177e4SLinus Torvalds * as the open_stateid->st_stateowner->so_client->clientid 22151da177e4SLinus Torvalds */ 22161da177e4SLinus Torvalds if (lockclid) { 22171da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 22181da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 22191da177e4SLinus Torvalds 22201da177e4SLinus Torvalds if (!sop->so_is_open_owner) 22211da177e4SLinus Torvalds goto out; 22221da177e4SLinus Torvalds if (!cmp_clid(&clp->cl_clientid, lockclid)) 22231da177e4SLinus Torvalds goto out; 22241da177e4SLinus Torvalds } 22251da177e4SLinus Torvalds 22261da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { 22271da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 22281da177e4SLinus Torvalds goto out; 22291da177e4SLinus Torvalds } 22301da177e4SLinus Torvalds 22311da177e4SLinus Torvalds *stpp = stp; 22321da177e4SLinus Torvalds *sopp = sop = stp->st_stateowner; 22331da177e4SLinus Torvalds 22341da177e4SLinus Torvalds /* 22351da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 22361da177e4SLinus Torvalds * For the moment, we ignore the possibility of 22371da177e4SLinus Torvalds * generation number wraparound. 22381da177e4SLinus Torvalds */ 2239bd9aac52SNeilBrown if (seqid != sop->so_seqid) 22401da177e4SLinus Torvalds goto check_replay; 22411da177e4SLinus Torvalds 22421da177e4SLinus Torvalds if (sop->so_confirmed) { 22431da177e4SLinus Torvalds if (flags & CONFIRM) { 22441da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n"); 22451da177e4SLinus Torvalds goto out; 22461da177e4SLinus Torvalds } 22471da177e4SLinus Torvalds } 22481da177e4SLinus Torvalds else { 22491da177e4SLinus Torvalds if (!(flags & CONFIRM)) { 22501da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n"); 22511da177e4SLinus Torvalds goto out; 22521da177e4SLinus Torvalds } 22531da177e4SLinus Torvalds } 22541da177e4SLinus Torvalds if (stateid->si_generation > stp->st_stateid.si_generation) { 22551da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: future stateid?!\n"); 22561da177e4SLinus Torvalds goto out; 22571da177e4SLinus Torvalds } 22581da177e4SLinus Torvalds 22591da177e4SLinus Torvalds status = nfserr_old_stateid; 22601da177e4SLinus Torvalds if (stateid->si_generation < stp->st_stateid.si_generation) { 22611da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: old stateid!\n"); 22621da177e4SLinus Torvalds goto out; 22631da177e4SLinus Torvalds } 226452fd004eSNeilBrown renew_client(sop->so_client); 22651da177e4SLinus Torvalds status = nfs_ok; 22661da177e4SLinus Torvalds 22671da177e4SLinus Torvalds out: 22681da177e4SLinus Torvalds return status; 22691da177e4SLinus Torvalds check_replay: 2270bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 22711da177e4SLinus Torvalds printk("NFSD: preprocess_seqid_op: retransmission?\n"); 22721da177e4SLinus Torvalds /* indicate replay to calling function */ 22731da177e4SLinus Torvalds status = NFSERR_REPLAY_ME; 22741da177e4SLinus Torvalds } else { 2275bd9aac52SNeilBrown printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid, seqid); 22761da177e4SLinus Torvalds 22771da177e4SLinus Torvalds *sopp = NULL; 22781da177e4SLinus Torvalds status = nfserr_bad_seqid; 22791da177e4SLinus Torvalds } 22801da177e4SLinus Torvalds goto out; 22811da177e4SLinus Torvalds } 22821da177e4SLinus Torvalds 22831da177e4SLinus Torvalds int 22841da177e4SLinus Torvalds nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc) 22851da177e4SLinus Torvalds { 22861da177e4SLinus Torvalds int status; 22871da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22881da177e4SLinus Torvalds struct nfs4_stateid *stp; 22891da177e4SLinus Torvalds 22901da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 22911da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 22921da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 22931da177e4SLinus Torvalds 22941da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 22951da177e4SLinus Torvalds goto out; 22961da177e4SLinus Torvalds 22971da177e4SLinus Torvalds nfs4_lock_state(); 22981da177e4SLinus Torvalds 22991da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, 23001da177e4SLinus Torvalds &oc->oc_req_stateid, 23011da177e4SLinus Torvalds CHECK_FH | CONFIRM | OPEN_STATE, 23021da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 23031da177e4SLinus Torvalds goto out; 23041da177e4SLinus Torvalds 23051da177e4SLinus Torvalds sop = oc->oc_stateowner; 23061da177e4SLinus Torvalds sop->so_confirmed = 1; 23071da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23081da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 23091da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 23101da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 23111da177e4SLinus Torvalds stp->st_stateid.si_boot, 23121da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 23131da177e4SLinus Torvalds stp->st_stateid.si_fileid, 23141da177e4SLinus Torvalds stp->st_stateid.si_generation); 2315c7b9a459SNeilBrown 2316c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 23171da177e4SLinus Torvalds out: 23181da177e4SLinus Torvalds if (oc->oc_stateowner) 23191da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 23201da177e4SLinus Torvalds nfs4_unlock_state(); 23211da177e4SLinus Torvalds return status; 23221da177e4SLinus Torvalds } 23231da177e4SLinus Torvalds 23241da177e4SLinus Torvalds 23251da177e4SLinus Torvalds /* 23261da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 23271da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 23281da177e4SLinus Torvalds */ 23291da177e4SLinus Torvalds static void 23301da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 23311da177e4SLinus Torvalds { 23321da177e4SLinus Torvalds int i; 23331da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 23341da177e4SLinus Torvalds if ((i & access) != i) 23351da177e4SLinus Torvalds __clear_bit(i, bmap); 23361da177e4SLinus Torvalds } 23371da177e4SLinus Torvalds } 23381da177e4SLinus Torvalds 23391da177e4SLinus Torvalds static void 23401da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 23411da177e4SLinus Torvalds { 23421da177e4SLinus Torvalds int i; 23431da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 23441da177e4SLinus Torvalds if ((i & deny) != i) 23451da177e4SLinus Torvalds __clear_bit(i, bmap); 23461da177e4SLinus Torvalds } 23471da177e4SLinus Torvalds } 23481da177e4SLinus Torvalds 23491da177e4SLinus Torvalds int 23501da177e4SLinus Torvalds nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od) 23511da177e4SLinus Torvalds { 23521da177e4SLinus Torvalds int status; 23531da177e4SLinus Torvalds struct nfs4_stateid *stp; 23541da177e4SLinus Torvalds unsigned int share_access; 23551da177e4SLinus Torvalds 23561da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 23571da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 23581da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 23591da177e4SLinus Torvalds 23601da177e4SLinus Torvalds if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) 23611da177e4SLinus Torvalds return nfserr_inval; 23621da177e4SLinus Torvalds 23631da177e4SLinus Torvalds nfs4_lock_state(); 23641da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, 23651da177e4SLinus Torvalds &od->od_stateid, 23661da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 23671da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23681da177e4SLinus Torvalds goto out; 23691da177e4SLinus Torvalds 23701da177e4SLinus Torvalds status = nfserr_inval; 23711da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23721da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23731da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23741da177e4SLinus Torvalds goto out; 23751da177e4SLinus Torvalds } 23761da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23771da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23781da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23791da177e4SLinus Torvalds goto out; 23801da177e4SLinus Torvalds } 23811da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23821da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23831da177e4SLinus Torvalds share_access & ~od->od_share_access); 23841da177e4SLinus Torvalds 23851da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23861da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23871da177e4SLinus Torvalds 23881da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23891da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23901da177e4SLinus Torvalds status = nfs_ok; 23911da177e4SLinus Torvalds out: 23921da177e4SLinus Torvalds if (od->od_stateowner) 23931da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 23941da177e4SLinus Torvalds nfs4_unlock_state(); 23951da177e4SLinus Torvalds return status; 23961da177e4SLinus Torvalds } 23971da177e4SLinus Torvalds 23981da177e4SLinus Torvalds /* 23991da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 24001da177e4SLinus Torvalds */ 24011da177e4SLinus Torvalds int 24021da177e4SLinus Torvalds nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close) 24031da177e4SLinus Torvalds { 24041da177e4SLinus Torvalds int status; 24051da177e4SLinus Torvalds struct nfs4_stateid *stp; 24061da177e4SLinus Torvalds 24071da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 24081da177e4SLinus Torvalds (int)current_fh->fh_dentry->d_name.len, 24091da177e4SLinus Torvalds current_fh->fh_dentry->d_name.name); 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds nfs4_lock_state(); 24121da177e4SLinus Torvalds /* check close_lru for replay */ 24131da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, 24141da177e4SLinus Torvalds &close->cl_stateid, 24151da177e4SLinus Torvalds CHECK_FH | OPEN_STATE | CLOSE_STATE, 24161da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 24171da177e4SLinus Torvalds goto out; 24181da177e4SLinus Torvalds /* 24191da177e4SLinus Torvalds * Return success, but first update the stateid. 24201da177e4SLinus Torvalds */ 24211da177e4SLinus Torvalds status = nfs_ok; 24221da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 24231da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 24241da177e4SLinus Torvalds 24251da177e4SLinus Torvalds /* release_state_owner() calls nfsd_close() if needed */ 24261da177e4SLinus Torvalds release_state_owner(stp, OPEN_STATE); 24271da177e4SLinus Torvalds out: 24281da177e4SLinus Torvalds if (close->cl_stateowner) 24291da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 24301da177e4SLinus Torvalds nfs4_unlock_state(); 24311da177e4SLinus Torvalds return status; 24321da177e4SLinus Torvalds } 24331da177e4SLinus Torvalds 24341da177e4SLinus Torvalds int 24351da177e4SLinus Torvalds nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) 24361da177e4SLinus Torvalds { 24371da177e4SLinus Torvalds int status; 24381da177e4SLinus Torvalds 24391da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) 24401da177e4SLinus Torvalds goto out; 24411da177e4SLinus Torvalds 24421da177e4SLinus Torvalds nfs4_lock_state(); 24431da177e4SLinus Torvalds status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); 24441da177e4SLinus Torvalds nfs4_unlock_state(); 24451da177e4SLinus Torvalds out: 24461da177e4SLinus Torvalds return status; 24471da177e4SLinus Torvalds } 24481da177e4SLinus Torvalds 24491da177e4SLinus Torvalds 24501da177e4SLinus Torvalds /* 24511da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24521da177e4SLinus Torvalds */ 24531da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24541da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24551da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24561da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24571da177e4SLinus Torvalds 24581da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24591da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24601da177e4SLinus Torvalds 24611da177e4SLinus Torvalds static inline unsigned int 24621da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24631da177e4SLinus Torvalds struct xdr_netobj *ownername) 24641da177e4SLinus Torvalds { 24651da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24661da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24671da177e4SLinus Torvalds & LOCK_HASH_MASK; 24681da177e4SLinus Torvalds } 24691da177e4SLinus Torvalds 24701da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24711da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24721da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24731da177e4SLinus Torvalds 2474fd39ca9aSNeilBrown static struct nfs4_stateid * 24751da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24761da177e4SLinus Torvalds { 24771da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24781da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24791da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24801da177e4SLinus Torvalds unsigned int hashval; 24811da177e4SLinus Torvalds 24821da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24831da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24841da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24851da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24861da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24871da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24881da177e4SLinus Torvalds return local; 24891da177e4SLinus Torvalds } 24901da177e4SLinus Torvalds } 24911da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24921da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24931da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24941da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24951da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24961da177e4SLinus Torvalds return local; 24971da177e4SLinus Torvalds } 24981da177e4SLinus Torvalds } else 24991da177e4SLinus Torvalds printk("NFSD: find_stateid: ERROR: no state flag\n"); 25001da177e4SLinus Torvalds return NULL; 25011da177e4SLinus Torvalds } 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds static struct nfs4_delegation * 25041da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 25051da177e4SLinus Torvalds { 250613cd2184SNeilBrown struct nfs4_file *fp; 250713cd2184SNeilBrown struct nfs4_delegation *dl; 25081da177e4SLinus Torvalds 25091da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 25101da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 25111da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 25121da177e4SLinus Torvalds 25131da177e4SLinus Torvalds fp = find_file(ino); 251413cd2184SNeilBrown if (!fp) 25151da177e4SLinus Torvalds return NULL; 251613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 251713cd2184SNeilBrown put_nfs4_file(fp); 251813cd2184SNeilBrown return dl; 25191da177e4SLinus Torvalds } 25201da177e4SLinus Torvalds 25211da177e4SLinus Torvalds /* 25221da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 25231da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 25241da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 25251da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 25261da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 25271da177e4SLinus Torvalds * the VFS, but this is a very deep change! 25281da177e4SLinus Torvalds */ 25291da177e4SLinus Torvalds static inline void 25301da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 25311da177e4SLinus Torvalds { 25321da177e4SLinus Torvalds if (lock->fl_start < 0) 25331da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 25341da177e4SLinus Torvalds if (lock->fl_end < 0) 25351da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 25361da177e4SLinus Torvalds } 25371da177e4SLinus Torvalds 2538fd39ca9aSNeilBrown static int 25391da177e4SLinus Torvalds nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) 25401da177e4SLinus Torvalds { 25411da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 25421da177e4SLinus Torvalds int status = 0; 25431da177e4SLinus Torvalds 25441da177e4SLinus Torvalds if (hashval >= LOCK_HASH_SIZE) 25451da177e4SLinus Torvalds goto out; 25461da177e4SLinus Torvalds list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) { 25471da177e4SLinus Torvalds if (local == sop) { 25481da177e4SLinus Torvalds status = 1; 25491da177e4SLinus Torvalds goto out; 25501da177e4SLinus Torvalds } 25511da177e4SLinus Torvalds } 25521da177e4SLinus Torvalds out: 25531da177e4SLinus Torvalds return status; 25541da177e4SLinus Torvalds } 25551da177e4SLinus Torvalds 25561da177e4SLinus Torvalds 25571da177e4SLinus Torvalds static inline void 25581da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25591da177e4SLinus Torvalds { 25601da177e4SLinus Torvalds struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner; 25611da177e4SLinus Torvalds unsigned int hval = lockownerid_hashval(sop->so_id); 25621da177e4SLinus Torvalds 25631da177e4SLinus Torvalds deny->ld_sop = NULL; 25641da177e4SLinus Torvalds if (nfs4_verify_lock_stateowner(sop, hval)) { 25651da177e4SLinus Torvalds kref_get(&sop->so_ref); 25661da177e4SLinus Torvalds deny->ld_sop = sop; 25671da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 25681da177e4SLinus Torvalds } 25691da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25701da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25711da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25721da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25731da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25741da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25751da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25761da177e4SLinus Torvalds } 25771da177e4SLinus Torvalds 25781da177e4SLinus Torvalds static struct nfs4_stateowner * 25791da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25801da177e4SLinus Torvalds struct xdr_netobj *owner) 25811da177e4SLinus Torvalds { 25821da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25831da177e4SLinus Torvalds struct nfs4_stateowner *op; 25841da177e4SLinus Torvalds 25851da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 25861da177e4SLinus Torvalds if (cmp_owner_str(op, owner, clid)) 25871da177e4SLinus Torvalds return op; 25881da177e4SLinus Torvalds } 25891da177e4SLinus Torvalds return NULL; 25901da177e4SLinus Torvalds } 25911da177e4SLinus Torvalds 25921da177e4SLinus Torvalds /* 25931da177e4SLinus Torvalds * Alloc a lock owner structure. 25941da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25951da177e4SLinus Torvalds * occured. 25961da177e4SLinus Torvalds * 25971da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25981da177e4SLinus Torvalds */ 25991da177e4SLinus Torvalds 26001da177e4SLinus Torvalds static struct nfs4_stateowner * 26011da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 26021da177e4SLinus Torvalds struct nfs4_stateowner *sop; 26031da177e4SLinus Torvalds struct nfs4_replay *rp; 26041da177e4SLinus Torvalds unsigned int idhashval; 26051da177e4SLinus Torvalds 26061da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 26071da177e4SLinus Torvalds return NULL; 26081da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 26091da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 26101da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 26111da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2612ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2613ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 26141da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 26151da177e4SLinus Torvalds sop->so_time = 0; 26161da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 26171da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2618ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 26191da177e4SLinus Torvalds sop->so_is_open_owner = 0; 26201da177e4SLinus Torvalds sop->so_id = current_ownerid++; 26211da177e4SLinus Torvalds sop->so_client = clp; 2622bd9aac52SNeilBrown sop->so_seqid = lock->lk_new_lock_seqid; 26231da177e4SLinus Torvalds sop->so_confirmed = 1; 26241da177e4SLinus Torvalds rp = &sop->so_replay; 26251da177e4SLinus Torvalds rp->rp_status = NFSERR_SERVERFAULT; 26261da177e4SLinus Torvalds rp->rp_buflen = 0; 26271da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 26281da177e4SLinus Torvalds return sop; 26291da177e4SLinus Torvalds } 26301da177e4SLinus Torvalds 2631fd39ca9aSNeilBrown static struct nfs4_stateid * 26321da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 26331da177e4SLinus Torvalds { 26341da177e4SLinus Torvalds struct nfs4_stateid *stp; 26351da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 26361da177e4SLinus Torvalds 26375ac049acSNeilBrown stp = nfs4_alloc_stateid(); 26385ac049acSNeilBrown if (stp == NULL) 26391da177e4SLinus Torvalds goto out; 26401da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 26411da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2642ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2643ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 26441da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 26458beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2646ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26471da177e4SLinus Torvalds stp->st_stateowner = sop; 264813cd2184SNeilBrown get_nfs4_file(fp); 26491da177e4SLinus Torvalds stp->st_file = fp; 26501da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26511da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26521da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26531da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26541da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26551da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26561da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26571da177e4SLinus Torvalds 26581da177e4SLinus Torvalds out: 26591da177e4SLinus Torvalds return stp; 26601da177e4SLinus Torvalds } 26611da177e4SLinus Torvalds 2662fd39ca9aSNeilBrown static int 26631da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26641da177e4SLinus Torvalds { 26651da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26661da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26671da177e4SLinus Torvalds } 26681da177e4SLinus Torvalds 26691da177e4SLinus Torvalds /* 26701da177e4SLinus Torvalds * LOCK operation 26711da177e4SLinus Torvalds */ 26721da177e4SLinus Torvalds int 26731da177e4SLinus Torvalds nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock) 26741da177e4SLinus Torvalds { 26753e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 26761da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26771da177e4SLinus Torvalds struct file *filp; 26781da177e4SLinus Torvalds struct file_lock file_lock; 26791da177e4SLinus Torvalds struct file_lock *conflock; 26801da177e4SLinus Torvalds int status = 0; 26811da177e4SLinus Torvalds unsigned int strhashval; 26821da177e4SLinus Torvalds 26831da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26841da177e4SLinus Torvalds (long long) lock->lk_offset, 26851da177e4SLinus Torvalds (long long) lock->lk_length); 26861da177e4SLinus Torvalds 26871da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26881da177e4SLinus Torvalds return nfserr_inval; 26891da177e4SLinus Torvalds 26901da177e4SLinus Torvalds nfs4_lock_state(); 26911da177e4SLinus Torvalds 26921da177e4SLinus Torvalds if (lock->lk_is_new) { 26931da177e4SLinus Torvalds /* 26941da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2695893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2696893f8770SNeilBrown * lock stateid. 26971da177e4SLinus Torvalds */ 26981da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26991da177e4SLinus Torvalds struct nfs4_file *fp; 27001da177e4SLinus Torvalds 27011da177e4SLinus Torvalds status = nfserr_stale_clientid; 27021da177e4SLinus Torvalds if (STALE_CLIENTID(&lock->lk_new_clientid)) { 27031da177e4SLinus Torvalds printk("NFSD: nfsd4_lock: clientid is stale!\n"); 27041da177e4SLinus Torvalds goto out; 27051da177e4SLinus Torvalds } 27061da177e4SLinus Torvalds 27071da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 27081da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 27091da177e4SLinus Torvalds lock->lk_new_open_seqid, 27101da177e4SLinus Torvalds &lock->lk_new_open_stateid, 27111da177e4SLinus Torvalds CHECK_FH | OPEN_STATE, 27121da177e4SLinus Torvalds &open_sop, &open_stp, 27131da177e4SLinus Torvalds &lock->v.new.clientid); 271437515177SNeilBrown if (status) 27151da177e4SLinus Torvalds goto out; 27161da177e4SLinus Torvalds /* create lockowner and lock stateid */ 27171da177e4SLinus Torvalds fp = open_stp->st_file; 27181da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 27191da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 27201da177e4SLinus Torvalds &lock->v.new.owner); 27213e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 27223e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 27233e9e3dbeSNeilBrown * create new stateids)? */ 27241da177e4SLinus Torvalds status = nfserr_resource; 27251da177e4SLinus Torvalds if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock))) 27261da177e4SLinus Torvalds goto out; 27271da177e4SLinus Torvalds if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner, 27281da177e4SLinus Torvalds fp, open_stp)) == NULL) { 27291da177e4SLinus Torvalds release_stateowner(lock->lk_stateowner); 27301da177e4SLinus Torvalds lock->lk_stateowner = NULL; 27311da177e4SLinus Torvalds goto out; 27321da177e4SLinus Torvalds } 27331da177e4SLinus Torvalds /* bump the open seqid used to create the lock */ 27341da177e4SLinus Torvalds open_sop->so_seqid++; 27351da177e4SLinus Torvalds } else { 27361da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 27371da177e4SLinus Torvalds status = nfs4_preprocess_seqid_op(current_fh, 27381da177e4SLinus Torvalds lock->lk_old_lock_seqid, 27391da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 27401da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 27411da177e4SLinus Torvalds &lock->lk_stateowner, &lock_stp, NULL); 27421da177e4SLinus Torvalds if (status) 27431da177e4SLinus Torvalds goto out; 27441da177e4SLinus Torvalds } 27451da177e4SLinus Torvalds /* lock->lk_stateowner and lock_stp have been created or found */ 27461da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27471da177e4SLinus Torvalds 27481da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { 27491da177e4SLinus Torvalds printk("NFSD: nfsd4_lock: permission denied!\n"); 27501da177e4SLinus Torvalds goto out; 27511da177e4SLinus Torvalds } 27521da177e4SLinus Torvalds 27530dd395dcSNeilBrown status = nfserr_grace; 27540dd395dcSNeilBrown if (nfs4_in_grace() && !lock->lk_reclaim) 27550dd395dcSNeilBrown goto out; 27560dd395dcSNeilBrown status = nfserr_no_grace; 27570dd395dcSNeilBrown if (!nfs4_in_grace() && lock->lk_reclaim) 27580dd395dcSNeilBrown goto out; 27590dd395dcSNeilBrown 27601da177e4SLinus Torvalds locks_init_lock(&file_lock); 27611da177e4SLinus Torvalds switch (lock->lk_type) { 27621da177e4SLinus Torvalds case NFS4_READ_LT: 27631da177e4SLinus Torvalds case NFS4_READW_LT: 27641da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 27651da177e4SLinus Torvalds break; 27661da177e4SLinus Torvalds case NFS4_WRITE_LT: 27671da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27681da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 27691da177e4SLinus Torvalds break; 27701da177e4SLinus Torvalds default: 27711da177e4SLinus Torvalds status = nfserr_inval; 27721da177e4SLinus Torvalds goto out; 27731da177e4SLinus Torvalds } 27741da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner; 27751da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27761da177e4SLinus Torvalds file_lock.fl_file = filp; 27771da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 27781da177e4SLinus Torvalds 27791da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27801da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27811da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27821da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27831da177e4SLinus Torvalds else 27841da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27851da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27861da177e4SLinus Torvalds 27871da177e4SLinus Torvalds /* 27881da177e4SLinus Torvalds * Try to lock the file in the VFS. 27891da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27901da177e4SLinus Torvalds */ 27911da177e4SLinus Torvalds 27921da177e4SLinus Torvalds status = posix_lock_file(filp, &file_lock); 27931da177e4SLinus Torvalds if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) 27941da177e4SLinus Torvalds file_lock.fl_ops->fl_release_private(&file_lock); 27951da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status); 27961da177e4SLinus Torvalds switch (-status) { 27971da177e4SLinus Torvalds case 0: /* success! */ 27981da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27991da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 28001da177e4SLinus Torvalds sizeof(stateid_t)); 28011da177e4SLinus Torvalds goto out; 28021da177e4SLinus Torvalds case (EAGAIN): 28031da177e4SLinus Torvalds goto conflicting_lock; 28041da177e4SLinus Torvalds case (EDEADLK): 28051da177e4SLinus Torvalds status = nfserr_deadlock; 28061da177e4SLinus Torvalds default: 28071da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status); 28081da177e4SLinus Torvalds goto out_destroy_new_stateid; 28091da177e4SLinus Torvalds } 28101da177e4SLinus Torvalds 28111da177e4SLinus Torvalds conflicting_lock: 28121da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 28131da177e4SLinus Torvalds status = nfserr_denied; 28141da177e4SLinus Torvalds /* XXX There is a race here. Future patch needed to provide 28151da177e4SLinus Torvalds * an atomic posix_lock_and_test_file 28161da177e4SLinus Torvalds */ 28171da177e4SLinus Torvalds if (!(conflock = posix_test_lock(filp, &file_lock))) { 28181da177e4SLinus Torvalds status = nfserr_serverfault; 28191da177e4SLinus Torvalds goto out; 28201da177e4SLinus Torvalds } 28211da177e4SLinus Torvalds nfs4_set_lock_denied(conflock, &lock->lk_denied); 28221da177e4SLinus Torvalds 28231da177e4SLinus Torvalds out_destroy_new_stateid: 28241da177e4SLinus Torvalds if (lock->lk_is_new) { 28251da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: destroy new stateid!\n"); 28261da177e4SLinus Torvalds /* 28271da177e4SLinus Torvalds * An error encountered after instantiation of the new 28281da177e4SLinus Torvalds * stateid has forced us to destroy it. 28291da177e4SLinus Torvalds */ 28301da177e4SLinus Torvalds if (!seqid_mutating_err(status)) 28311da177e4SLinus Torvalds open_sop->so_seqid--; 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds release_state_owner(lock_stp, LOCK_STATE); 28341da177e4SLinus Torvalds } 28351da177e4SLinus Torvalds out: 28361da177e4SLinus Torvalds if (lock->lk_stateowner) 28371da177e4SLinus Torvalds nfs4_get_stateowner(lock->lk_stateowner); 28381da177e4SLinus Torvalds nfs4_unlock_state(); 28391da177e4SLinus Torvalds return status; 28401da177e4SLinus Torvalds } 28411da177e4SLinus Torvalds 28421da177e4SLinus Torvalds /* 28431da177e4SLinus Torvalds * LOCKT operation 28441da177e4SLinus Torvalds */ 28451da177e4SLinus Torvalds int 28461da177e4SLinus Torvalds nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) 28471da177e4SLinus Torvalds { 28481da177e4SLinus Torvalds struct inode *inode; 28491da177e4SLinus Torvalds struct file file; 28501da177e4SLinus Torvalds struct file_lock file_lock; 28511da177e4SLinus Torvalds struct file_lock *conflicting_lock; 28521da177e4SLinus Torvalds int status; 28531da177e4SLinus Torvalds 28541da177e4SLinus Torvalds if (nfs4_in_grace()) 28551da177e4SLinus Torvalds return nfserr_grace; 28561da177e4SLinus Torvalds 28571da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28581da177e4SLinus Torvalds return nfserr_inval; 28591da177e4SLinus Torvalds 28601da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28611da177e4SLinus Torvalds nfs4_lock_state(); 28621da177e4SLinus Torvalds 28631da177e4SLinus Torvalds status = nfserr_stale_clientid; 28641da177e4SLinus Torvalds if (STALE_CLIENTID(&lockt->lt_clientid)) { 28651da177e4SLinus Torvalds printk("NFSD: nfsd4_lockt: clientid is stale!\n"); 28661da177e4SLinus Torvalds goto out; 28671da177e4SLinus Torvalds } 28681da177e4SLinus Torvalds 28691da177e4SLinus Torvalds if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { 28701da177e4SLinus Torvalds printk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28711da177e4SLinus Torvalds if (status == nfserr_symlink) 28721da177e4SLinus Torvalds status = nfserr_inval; 28731da177e4SLinus Torvalds goto out; 28741da177e4SLinus Torvalds } 28751da177e4SLinus Torvalds 28761da177e4SLinus Torvalds inode = current_fh->fh_dentry->d_inode; 28771da177e4SLinus Torvalds locks_init_lock(&file_lock); 28781da177e4SLinus Torvalds switch (lockt->lt_type) { 28791da177e4SLinus Torvalds case NFS4_READ_LT: 28801da177e4SLinus Torvalds case NFS4_READW_LT: 28811da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28821da177e4SLinus Torvalds break; 28831da177e4SLinus Torvalds case NFS4_WRITE_LT: 28841da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28851da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28861da177e4SLinus Torvalds break; 28871da177e4SLinus Torvalds default: 28881da177e4SLinus Torvalds printk("NFSD: nfs4_lockt: bad lock type!\n"); 28891da177e4SLinus Torvalds status = nfserr_inval; 28901da177e4SLinus Torvalds goto out; 28911da177e4SLinus Torvalds } 28921da177e4SLinus Torvalds 28931da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28941da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28951da177e4SLinus Torvalds if (lockt->lt_stateowner) 28961da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28971da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28981da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 28991da177e4SLinus Torvalds 29001da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 29011da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 29021da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29031da177e4SLinus Torvalds else 29041da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 29051da177e4SLinus Torvalds 29061da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29071da177e4SLinus Torvalds 29081da177e4SLinus Torvalds /* posix_test_lock uses the struct file _only_ to resolve the inode. 29091da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 29101da177e4SLinus Torvalds * file may not exist, pass posix_test_lock a struct file with 29111da177e4SLinus Torvalds * only the dentry:inode set. 29121da177e4SLinus Torvalds */ 29131da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 29141da177e4SLinus Torvalds file.f_dentry = current_fh->fh_dentry; 29151da177e4SLinus Torvalds 29161da177e4SLinus Torvalds status = nfs_ok; 29171da177e4SLinus Torvalds conflicting_lock = posix_test_lock(&file, &file_lock); 29181da177e4SLinus Torvalds if (conflicting_lock) { 29191da177e4SLinus Torvalds status = nfserr_denied; 29201da177e4SLinus Torvalds nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied); 29211da177e4SLinus Torvalds } 29221da177e4SLinus Torvalds out: 29231da177e4SLinus Torvalds nfs4_unlock_state(); 29241da177e4SLinus Torvalds return status; 29251da177e4SLinus Torvalds } 29261da177e4SLinus Torvalds 29271da177e4SLinus Torvalds int 29281da177e4SLinus Torvalds nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku) 29291da177e4SLinus Torvalds { 29301da177e4SLinus Torvalds struct nfs4_stateid *stp; 29311da177e4SLinus Torvalds struct file *filp = NULL; 29321da177e4SLinus Torvalds struct file_lock file_lock; 29331da177e4SLinus Torvalds int status; 29341da177e4SLinus Torvalds 29351da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 29361da177e4SLinus Torvalds (long long) locku->lu_offset, 29371da177e4SLinus Torvalds (long long) locku->lu_length); 29381da177e4SLinus Torvalds 29391da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 29401da177e4SLinus Torvalds return nfserr_inval; 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds nfs4_lock_state(); 29431da177e4SLinus Torvalds 29441da177e4SLinus Torvalds if ((status = nfs4_preprocess_seqid_op(current_fh, 29451da177e4SLinus Torvalds locku->lu_seqid, 29461da177e4SLinus Torvalds &locku->lu_stateid, 29471da177e4SLinus Torvalds CHECK_FH | LOCK_STATE, 29481da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 29491da177e4SLinus Torvalds goto out; 29501da177e4SLinus Torvalds 29511da177e4SLinus Torvalds filp = stp->st_vfs_file; 29521da177e4SLinus Torvalds BUG_ON(!filp); 29531da177e4SLinus Torvalds locks_init_lock(&file_lock); 29541da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29551da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29561da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29571da177e4SLinus Torvalds file_lock.fl_file = filp; 29581da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 29591da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29601da177e4SLinus Torvalds 29611da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29621da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29631da177e4SLinus Torvalds else 29641da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29651da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29661da177e4SLinus Torvalds 29671da177e4SLinus Torvalds /* 29681da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29691da177e4SLinus Torvalds */ 29701da177e4SLinus Torvalds status = posix_lock_file(filp, &file_lock); 29711da177e4SLinus Torvalds if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) 29721da177e4SLinus Torvalds file_lock.fl_ops->fl_release_private(&file_lock); 29731da177e4SLinus Torvalds if (status) { 29741da177e4SLinus Torvalds printk("NFSD: nfs4_locku: posix_lock_file failed!\n"); 29751da177e4SLinus Torvalds goto out_nfserr; 29761da177e4SLinus Torvalds } 29771da177e4SLinus Torvalds /* 29781da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29791da177e4SLinus Torvalds */ 29801da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29811da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29821da177e4SLinus Torvalds 29831da177e4SLinus Torvalds out: 29841da177e4SLinus Torvalds if (locku->lu_stateowner) 29851da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 29861da177e4SLinus Torvalds nfs4_unlock_state(); 29871da177e4SLinus Torvalds return status; 29881da177e4SLinus Torvalds 29891da177e4SLinus Torvalds out_nfserr: 29901da177e4SLinus Torvalds status = nfserrno(status); 29911da177e4SLinus Torvalds goto out; 29921da177e4SLinus Torvalds } 29931da177e4SLinus Torvalds 29941da177e4SLinus Torvalds /* 29951da177e4SLinus Torvalds * returns 29961da177e4SLinus Torvalds * 1: locks held by lockowner 29971da177e4SLinus Torvalds * 0: no locks held by lockowner 29981da177e4SLinus Torvalds */ 29991da177e4SLinus Torvalds static int 30001da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 30011da177e4SLinus Torvalds { 30021da177e4SLinus Torvalds struct file_lock **flpp; 30031da177e4SLinus Torvalds struct inode *inode = filp->f_dentry->d_inode; 30041da177e4SLinus Torvalds int status = 0; 30051da177e4SLinus Torvalds 30061da177e4SLinus Torvalds lock_kernel(); 30071da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 30081da177e4SLinus Torvalds if ((*flpp)->fl_owner == (fl_owner_t)lowner) 30091da177e4SLinus Torvalds status = 1; 30101da177e4SLinus Torvalds goto out; 30111da177e4SLinus Torvalds } 30121da177e4SLinus Torvalds out: 30131da177e4SLinus Torvalds unlock_kernel(); 30141da177e4SLinus Torvalds return status; 30151da177e4SLinus Torvalds } 30161da177e4SLinus Torvalds 30171da177e4SLinus Torvalds int 30181da177e4SLinus Torvalds nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) 30191da177e4SLinus Torvalds { 30201da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 30213e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 30223e9e3dbeSNeilBrown struct nfs4_stateid *stp; 30231da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 30243e9e3dbeSNeilBrown struct list_head matches; 30253e9e3dbeSNeilBrown int i; 30261da177e4SLinus Torvalds int status; 30271da177e4SLinus Torvalds 30281da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 30291da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 30301da177e4SLinus Torvalds 30311da177e4SLinus Torvalds /* XXX check for lease expiration */ 30321da177e4SLinus Torvalds 30331da177e4SLinus Torvalds status = nfserr_stale_clientid; 30341da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) { 30351da177e4SLinus Torvalds printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n"); 30361da177e4SLinus Torvalds return status; 30371da177e4SLinus Torvalds } 30381da177e4SLinus Torvalds 30391da177e4SLinus Torvalds nfs4_lock_state(); 30401da177e4SLinus Torvalds 30411da177e4SLinus Torvalds status = nfserr_locks_held; 30423e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 30433e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 30443e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 30453e9e3dbeSNeilBrown * data structures. */ 30463e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 30473e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 30483e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 30493e9e3dbeSNeilBrown if (!cmp_owner_str(sop, owner, clid)) 30503e9e3dbeSNeilBrown continue; 30513e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3052ea1da636SNeilBrown st_perstateowner) { 30533e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30541da177e4SLinus Torvalds goto out; 30553e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30563e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30573e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30581da177e4SLinus Torvalds } 30593e9e3dbeSNeilBrown } 30603e9e3dbeSNeilBrown } 30613e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30623e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30633e9e3dbeSNeilBrown * have been checked. */ 30641da177e4SLinus Torvalds status = nfs_ok; 30650fa822e4SNeilBrown while (!list_empty(&matches)) { 30660fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30670fa822e4SNeilBrown so_perclient); 30680fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30690fa822e4SNeilBrown * for openowners. */ 30700fa822e4SNeilBrown list_del(&sop->so_perclient); 30713e9e3dbeSNeilBrown release_stateowner(sop); 30721da177e4SLinus Torvalds } 30731da177e4SLinus Torvalds out: 30741da177e4SLinus Torvalds nfs4_unlock_state(); 30751da177e4SLinus Torvalds return status; 30761da177e4SLinus Torvalds } 30771da177e4SLinus Torvalds 30781da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3079a55370a3SNeilBrown alloc_reclaim(void) 30801da177e4SLinus Torvalds { 3081a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30821da177e4SLinus Torvalds } 30831da177e4SLinus Torvalds 3084c7b9a459SNeilBrown int 3085c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3086c7b9a459SNeilBrown { 3087c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3088c7b9a459SNeilBrown struct nfs4_client *clp; 3089c7b9a459SNeilBrown 3090c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3091c7b9a459SNeilBrown return clp ? 1 : 0; 3092c7b9a459SNeilBrown } 3093c7b9a459SNeilBrown 30941da177e4SLinus Torvalds /* 30951da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30961da177e4SLinus Torvalds */ 3097190e4fbfSNeilBrown int 3098190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30991da177e4SLinus Torvalds { 31001da177e4SLinus Torvalds unsigned int strhashval; 31011da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31021da177e4SLinus Torvalds 3103a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3104a55370a3SNeilBrown crp = alloc_reclaim(); 31051da177e4SLinus Torvalds if (!crp) 31061da177e4SLinus Torvalds return 0; 3107a55370a3SNeilBrown strhashval = clientstr_hashval(name); 31081da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 31091da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3110a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 31111da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 31121da177e4SLinus Torvalds return 1; 31131da177e4SLinus Torvalds } 31141da177e4SLinus Torvalds 31151da177e4SLinus Torvalds static void 31161da177e4SLinus Torvalds nfs4_release_reclaim(void) 31171da177e4SLinus Torvalds { 31181da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31191da177e4SLinus Torvalds int i; 31201da177e4SLinus Torvalds 31211da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31221da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 31231da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 31241da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 31251da177e4SLinus Torvalds list_del(&crp->cr_strhash); 31261da177e4SLinus Torvalds kfree(crp); 31271da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 31281da177e4SLinus Torvalds } 31291da177e4SLinus Torvalds } 31301da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 31311da177e4SLinus Torvalds } 31321da177e4SLinus Torvalds 31331da177e4SLinus Torvalds /* 31341da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3135fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 31361da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 31371da177e4SLinus Torvalds { 31381da177e4SLinus Torvalds unsigned int strhashval; 31391da177e4SLinus Torvalds struct nfs4_client *clp; 31401da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 31411da177e4SLinus Torvalds 31421da177e4SLinus Torvalds 31431da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 31441da177e4SLinus Torvalds clp = find_confirmed_client(clid); 31451da177e4SLinus Torvalds if (clp == NULL) 31461da177e4SLinus Torvalds return NULL; 31471da177e4SLinus Torvalds 3148a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3149a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3150a55370a3SNeilBrown clp->cl_recdir); 31511da177e4SLinus Torvalds 31521da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3153a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31541da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3155a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31561da177e4SLinus Torvalds return crp; 31571da177e4SLinus Torvalds } 31581da177e4SLinus Torvalds } 31591da177e4SLinus Torvalds return NULL; 31601da177e4SLinus Torvalds } 31611da177e4SLinus Torvalds 31621da177e4SLinus Torvalds /* 31631da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31641da177e4SLinus Torvalds */ 31651da177e4SLinus Torvalds int 31661da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31671da177e4SLinus Torvalds { 3168dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31691da177e4SLinus Torvalds } 31701da177e4SLinus Torvalds 3171ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31721da177e4SLinus Torvalds 3173ac4d8ff2SNeilBrown void 3174ac4d8ff2SNeilBrown nfs4_state_init(void) 31751da177e4SLinus Torvalds { 31761da177e4SLinus Torvalds int i; 31771da177e4SLinus Torvalds 31781da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31791da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31801da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31811da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31821da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31831da177e4SLinus Torvalds } 31841da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31851da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31861da177e4SLinus Torvalds } 31871da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31881da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31891da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31901da177e4SLinus Torvalds } 31911da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31921da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31931da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31941da177e4SLinus Torvalds } 31951da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31961da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31971da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31981da177e4SLinus Torvalds } 31991da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 32001da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 32011da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 32021da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3203ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3204ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3205ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3206ac4d8ff2SNeilBrown } 3207ac4d8ff2SNeilBrown 3208190e4fbfSNeilBrown static void 3209190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3210190e4fbfSNeilBrown { 3211190e4fbfSNeilBrown int status; 3212190e4fbfSNeilBrown 32130964a3d3SNeilBrown nfs4_lock_state(); 32140964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3215190e4fbfSNeilBrown status = nfsd4_recdir_load(); 32160964a3d3SNeilBrown nfs4_unlock_state(); 3217190e4fbfSNeilBrown if (status) 3218190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3219190e4fbfSNeilBrown } 3220190e4fbfSNeilBrown 3221ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3222ac4d8ff2SNeilBrown 3223ac4d8ff2SNeilBrown static void 3224ac4d8ff2SNeilBrown __nfs4_state_start(void) 3225ac4d8ff2SNeilBrown { 3226ac4d8ff2SNeilBrown time_t grace_time; 3227ac4d8ff2SNeilBrown 32281da177e4SLinus Torvalds boot_time = get_seconds(); 3229d99a05adSNeilBrown grace_time = max(user_lease_time, lease_time); 3230d99a05adSNeilBrown lease_time = user_lease_time; 3231a76b4319SNeilBrown in_grace = 1; 32321da177e4SLinus Torvalds printk("NFSD: starting %ld-second grace period\n", grace_time); 323358da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 3234a76b4319SNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); 32351da177e4SLinus Torvalds } 32361da177e4SLinus Torvalds 32371da177e4SLinus Torvalds int 323876a3550eSNeilBrown nfs4_state_start(void) 32391da177e4SLinus Torvalds { 32401da177e4SLinus Torvalds int status; 32411da177e4SLinus Torvalds 32421da177e4SLinus Torvalds if (nfs4_init) 32431da177e4SLinus Torvalds return 0; 32441da177e4SLinus Torvalds status = nfsd4_init_slabs(); 32451da177e4SLinus Torvalds if (status) 32461da177e4SLinus Torvalds return status; 3247190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 324876a3550eSNeilBrown __nfs4_state_start(); 32491da177e4SLinus Torvalds nfs4_init = 1; 32501da177e4SLinus Torvalds return 0; 32511da177e4SLinus Torvalds } 32521da177e4SLinus Torvalds 32531da177e4SLinus Torvalds int 32541da177e4SLinus Torvalds nfs4_in_grace(void) 32551da177e4SLinus Torvalds { 3256a76b4319SNeilBrown return in_grace; 32571da177e4SLinus Torvalds } 32581da177e4SLinus Torvalds 32591da177e4SLinus Torvalds time_t 32601da177e4SLinus Torvalds nfs4_lease_time(void) 32611da177e4SLinus Torvalds { 32621da177e4SLinus Torvalds return lease_time; 32631da177e4SLinus Torvalds } 32641da177e4SLinus Torvalds 32651da177e4SLinus Torvalds static void 32661da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32671da177e4SLinus Torvalds { 32681da177e4SLinus Torvalds int i; 32691da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32701da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32711da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 32721da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32731da177e4SLinus Torvalds 32741da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 32751da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 32761da177e4SLinus Torvalds list_del(&sop->so_close_lru); 32771da177e4SLinus Torvalds nfs4_put_stateowner(sop); 32781da177e4SLinus Torvalds } 32791da177e4SLinus Torvalds 32801da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32811da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32821da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32831da177e4SLinus Torvalds expire_client(clp); 32841da177e4SLinus Torvalds } 32851da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32861da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32871da177e4SLinus Torvalds expire_client(clp); 32881da177e4SLinus Torvalds } 32891da177e4SLinus Torvalds } 32901da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32911da177e4SLinus Torvalds spin_lock(&recall_lock); 32921da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32931da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32941da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32951da177e4SLinus Torvalds } 32961da177e4SLinus Torvalds spin_unlock(&recall_lock); 32971da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32981da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32991da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 33001da177e4SLinus Torvalds unhash_delegation(dp); 33011da177e4SLinus Torvalds } 33021da177e4SLinus Torvalds 33031da177e4SLinus Torvalds cancel_delayed_work(&laundromat_work); 330458da282bSNeilBrown flush_workqueue(laundry_wq); 330558da282bSNeilBrown destroy_workqueue(laundry_wq); 3306190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 33071da177e4SLinus Torvalds nfs4_init = 0; 33081da177e4SLinus Torvalds } 33091da177e4SLinus Torvalds 33101da177e4SLinus Torvalds void 33111da177e4SLinus Torvalds nfs4_state_shutdown(void) 33121da177e4SLinus Torvalds { 33131da177e4SLinus Torvalds nfs4_lock_state(); 33141da177e4SLinus Torvalds nfs4_release_reclaim(); 33151da177e4SLinus Torvalds __nfs4_state_shutdown(); 33161da177e4SLinus Torvalds nfsd4_free_slabs(); 33171da177e4SLinus Torvalds nfs4_unlock_state(); 33181da177e4SLinus Torvalds } 33191da177e4SLinus Torvalds 33200964a3d3SNeilBrown static void 33210964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 33220964a3d3SNeilBrown { 33230964a3d3SNeilBrown nfs4_lock_state(); 33240964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 33250964a3d3SNeilBrown nfs4_unlock_state(); 33260964a3d3SNeilBrown } 33270964a3d3SNeilBrown 33280964a3d3SNeilBrown /* 33290964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 33300964a3d3SNeilBrown */ 33310964a3d3SNeilBrown int 33320964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 33330964a3d3SNeilBrown { 33340964a3d3SNeilBrown int status; 33350964a3d3SNeilBrown struct nameidata nd; 33360964a3d3SNeilBrown 33370964a3d3SNeilBrown status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); 33380964a3d3SNeilBrown if (status) 33390964a3d3SNeilBrown return status; 33400964a3d3SNeilBrown status = -ENOTDIR; 33410964a3d3SNeilBrown if (S_ISDIR(nd.dentry->d_inode->i_mode)) { 33420964a3d3SNeilBrown nfs4_set_recdir(recdir); 33430964a3d3SNeilBrown status = 0; 33440964a3d3SNeilBrown } 33450964a3d3SNeilBrown path_release(&nd); 33460964a3d3SNeilBrown return status; 33470964a3d3SNeilBrown } 33480964a3d3SNeilBrown 33491da177e4SLinus Torvalds /* 33501da177e4SLinus Torvalds * Called when leasetime is changed. 33511da177e4SLinus Torvalds * 3352d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3353d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3354d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3355d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3356d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33571da177e4SLinus Torvalds */ 33581da177e4SLinus Torvalds void 33591da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33601da177e4SLinus Torvalds { 3361d99a05adSNeilBrown lock_kernel(); 3362d99a05adSNeilBrown user_lease_time = leasetime; 3363d99a05adSNeilBrown unlock_kernel(); 33641da177e4SLinus Torvalds } 3365