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> 44aceaf78dSDave Hansen #include <linux/file.h> 451da177e4SLinus Torvalds #include <linux/mount.h> 461da177e4SLinus Torvalds #include <linux/workqueue.h> 471da177e4SLinus Torvalds #include <linux/smp_lock.h> 481da177e4SLinus Torvalds #include <linux/kthread.h> 491da177e4SLinus Torvalds #include <linux/nfs4.h> 501da177e4SLinus Torvalds #include <linux/nfsd/state.h> 511da177e4SLinus Torvalds #include <linux/nfsd/xdr4.h> 520964a3d3SNeilBrown #include <linux/namei.h> 53c2f1a551SMeelap Shah #include <linux/swap.h> 54353ab6e9SIngo Molnar #include <linux/mutex.h> 55fd85b817SMarc Eshel #include <linux/lockd/bind.h> 569a8db97eSMarc Eshel #include <linux/module.h> 5768e76ad0SOlga Kornievskaia #include <linux/sunrpc/svcauth_gss.h> 581da177e4SLinus Torvalds 591da177e4SLinus Torvalds #define NFSDDBG_FACILITY NFSDDBG_PROC 601da177e4SLinus Torvalds 611da177e4SLinus Torvalds /* Globals */ 621da177e4SLinus Torvalds static time_t lease_time = 90; /* default lease time */ 63d99a05adSNeilBrown static time_t user_lease_time = 90; 64fd39ca9aSNeilBrown static time_t boot_time; 651da177e4SLinus Torvalds static u32 current_ownerid = 1; 661da177e4SLinus Torvalds static u32 current_fileid = 1; 671da177e4SLinus Torvalds static u32 current_delegid = 1; 681da177e4SLinus Torvalds static u32 nfs4_init; 69fd39ca9aSNeilBrown static stateid_t zerostateid; /* bits all 0 */ 70fd39ca9aSNeilBrown static stateid_t onestateid; /* bits all 1 */ 71fd39ca9aSNeilBrown 72fd39ca9aSNeilBrown #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) 73fd39ca9aSNeilBrown #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds /* forward declarations */ 76fd39ca9aSNeilBrown static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); 771da177e4SLinus Torvalds static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); 781da177e4SLinus Torvalds static void release_stateid_lockowners(struct nfs4_stateid *open_stp); 790964a3d3SNeilBrown static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; 800964a3d3SNeilBrown static void nfs4_set_recdir(char *recdir); 811da177e4SLinus Torvalds 821da177e4SLinus Torvalds /* Locking: 831da177e4SLinus Torvalds * 84353ab6e9SIngo Molnar * client_mutex: 851da177e4SLinus Torvalds * protects clientid_hashtbl[], clientstr_hashtbl[], 861da177e4SLinus Torvalds * unconfstr_hashtbl[], uncofid_hashtbl[]. 871da177e4SLinus Torvalds */ 88353ab6e9SIngo Molnar static DEFINE_MUTEX(client_mutex); 891da177e4SLinus Torvalds 90e18b890bSChristoph Lameter static struct kmem_cache *stateowner_slab = NULL; 91e18b890bSChristoph Lameter static struct kmem_cache *file_slab = NULL; 92e18b890bSChristoph Lameter static struct kmem_cache *stateid_slab = NULL; 93e18b890bSChristoph Lameter static struct kmem_cache *deleg_slab = NULL; 94e60d4398SNeilBrown 951da177e4SLinus Torvalds void 961da177e4SLinus Torvalds nfs4_lock_state(void) 971da177e4SLinus Torvalds { 98353ab6e9SIngo Molnar mutex_lock(&client_mutex); 991da177e4SLinus Torvalds } 1001da177e4SLinus Torvalds 1011da177e4SLinus Torvalds void 1021da177e4SLinus Torvalds nfs4_unlock_state(void) 1031da177e4SLinus Torvalds { 104353ab6e9SIngo Molnar mutex_unlock(&client_mutex); 1051da177e4SLinus Torvalds } 1061da177e4SLinus Torvalds 1071da177e4SLinus Torvalds static inline u32 1081da177e4SLinus Torvalds opaque_hashval(const void *ptr, int nbytes) 1091da177e4SLinus Torvalds { 1101da177e4SLinus Torvalds unsigned char *cptr = (unsigned char *) ptr; 1111da177e4SLinus Torvalds 1121da177e4SLinus Torvalds u32 x = 0; 1131da177e4SLinus Torvalds while (nbytes--) { 1141da177e4SLinus Torvalds x *= 37; 1151da177e4SLinus Torvalds x += *cptr++; 1161da177e4SLinus Torvalds } 1171da177e4SLinus Torvalds return x; 1181da177e4SLinus Torvalds } 1191da177e4SLinus Torvalds 1201da177e4SLinus Torvalds /* forward declarations */ 1211da177e4SLinus Torvalds static void release_stateowner(struct nfs4_stateowner *sop); 1221da177e4SLinus Torvalds static void release_stateid(struct nfs4_stateid *stp, int flags); 1231da177e4SLinus Torvalds 1241da177e4SLinus Torvalds /* 1251da177e4SLinus Torvalds * Delegation state 1261da177e4SLinus Torvalds */ 1271da177e4SLinus Torvalds 1281da177e4SLinus Torvalds /* recall_lock protects the del_recall_lru */ 12934af946aSIngo Molnar static DEFINE_SPINLOCK(recall_lock); 1301da177e4SLinus Torvalds static struct list_head del_recall_lru; 1311da177e4SLinus Torvalds 13213cd2184SNeilBrown static void 13313cd2184SNeilBrown free_nfs4_file(struct kref *kref) 13413cd2184SNeilBrown { 13513cd2184SNeilBrown struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); 13613cd2184SNeilBrown list_del(&fp->fi_hash); 13713cd2184SNeilBrown iput(fp->fi_inode); 13813cd2184SNeilBrown kmem_cache_free(file_slab, fp); 13913cd2184SNeilBrown } 14013cd2184SNeilBrown 14113cd2184SNeilBrown static inline void 14213cd2184SNeilBrown put_nfs4_file(struct nfs4_file *fi) 14313cd2184SNeilBrown { 14413cd2184SNeilBrown kref_put(&fi->fi_ref, free_nfs4_file); 14513cd2184SNeilBrown } 14613cd2184SNeilBrown 14713cd2184SNeilBrown static inline void 14813cd2184SNeilBrown get_nfs4_file(struct nfs4_file *fi) 14913cd2184SNeilBrown { 15013cd2184SNeilBrown kref_get(&fi->fi_ref); 15113cd2184SNeilBrown } 15213cd2184SNeilBrown 153ef0f3390SNeilBrown static int num_delegations; 154c2f1a551SMeelap Shah unsigned int max_delegations; 155ef0f3390SNeilBrown 156ef0f3390SNeilBrown /* 157ef0f3390SNeilBrown * Open owner state (share locks) 158ef0f3390SNeilBrown */ 159ef0f3390SNeilBrown 160ef0f3390SNeilBrown /* hash tables for nfs4_stateowner */ 161ef0f3390SNeilBrown #define OWNER_HASH_BITS 8 162ef0f3390SNeilBrown #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) 163ef0f3390SNeilBrown #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) 164ef0f3390SNeilBrown 165ef0f3390SNeilBrown #define ownerid_hashval(id) \ 166ef0f3390SNeilBrown ((id) & OWNER_HASH_MASK) 167ef0f3390SNeilBrown #define ownerstr_hashval(clientid, ownername) \ 168ef0f3390SNeilBrown (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) 169ef0f3390SNeilBrown 170ef0f3390SNeilBrown static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; 171ef0f3390SNeilBrown static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; 172ef0f3390SNeilBrown 173ef0f3390SNeilBrown /* hash table for nfs4_file */ 174ef0f3390SNeilBrown #define FILE_HASH_BITS 8 175ef0f3390SNeilBrown #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) 176ef0f3390SNeilBrown #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) 177ef0f3390SNeilBrown /* hash table for (open)nfs4_stateid */ 178ef0f3390SNeilBrown #define STATEID_HASH_BITS 10 179ef0f3390SNeilBrown #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) 180ef0f3390SNeilBrown #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) 181ef0f3390SNeilBrown 182ef0f3390SNeilBrown #define file_hashval(x) \ 183ef0f3390SNeilBrown hash_ptr(x, FILE_HASH_BITS) 184ef0f3390SNeilBrown #define stateid_hashval(owner_id, file_id) \ 185ef0f3390SNeilBrown (((owner_id) + (file_id)) & STATEID_HASH_MASK) 186ef0f3390SNeilBrown 187ef0f3390SNeilBrown static struct list_head file_hashtbl[FILE_HASH_SIZE]; 188ef0f3390SNeilBrown static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; 189ef0f3390SNeilBrown 1901da177e4SLinus Torvalds static struct nfs4_delegation * 1911da177e4SLinus Torvalds alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) 1921da177e4SLinus Torvalds { 1931da177e4SLinus Torvalds struct nfs4_delegation *dp; 1941da177e4SLinus Torvalds struct nfs4_file *fp = stp->st_file; 1951da177e4SLinus Torvalds struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; 1961da177e4SLinus Torvalds 1971da177e4SLinus Torvalds dprintk("NFSD alloc_init_deleg\n"); 19847f9940cSMeelap Shah if (fp->fi_had_conflict) 19947f9940cSMeelap Shah return NULL; 200c2f1a551SMeelap Shah if (num_delegations > max_delegations) 201ef0f3390SNeilBrown return NULL; 2025b2d21c1SNeilBrown dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); 2035b2d21c1SNeilBrown if (dp == NULL) 2041da177e4SLinus Torvalds return dp; 205ef0f3390SNeilBrown num_delegations++; 206ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perfile); 207ea1da636SNeilBrown INIT_LIST_HEAD(&dp->dl_perclnt); 2081da177e4SLinus Torvalds INIT_LIST_HEAD(&dp->dl_recall_lru); 2091da177e4SLinus Torvalds dp->dl_client = clp; 21013cd2184SNeilBrown get_nfs4_file(fp); 2111da177e4SLinus Torvalds dp->dl_file = fp; 2121da177e4SLinus Torvalds dp->dl_flock = NULL; 2131da177e4SLinus Torvalds get_file(stp->st_vfs_file); 2141da177e4SLinus Torvalds dp->dl_vfs_file = stp->st_vfs_file; 2151da177e4SLinus Torvalds dp->dl_type = type; 2161da177e4SLinus Torvalds dp->dl_recall.cbr_dp = NULL; 2171da177e4SLinus Torvalds dp->dl_recall.cbr_ident = cb->cb_ident; 2181da177e4SLinus Torvalds dp->dl_recall.cbr_trunc = 0; 2191da177e4SLinus Torvalds dp->dl_stateid.si_boot = boot_time; 2201da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid = current_delegid++; 2211da177e4SLinus Torvalds dp->dl_stateid.si_fileid = 0; 2221da177e4SLinus Torvalds dp->dl_stateid.si_generation = 0; 2231da177e4SLinus Torvalds dp->dl_fhlen = current_fh->fh_handle.fh_size; 2241da177e4SLinus Torvalds memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, 2251da177e4SLinus Torvalds current_fh->fh_handle.fh_size); 2261da177e4SLinus Torvalds dp->dl_time = 0; 2271da177e4SLinus Torvalds atomic_set(&dp->dl_count, 1); 228ea1da636SNeilBrown list_add(&dp->dl_perfile, &fp->fi_delegations); 229ea1da636SNeilBrown list_add(&dp->dl_perclnt, &clp->cl_delegations); 2301da177e4SLinus Torvalds return dp; 2311da177e4SLinus Torvalds } 2321da177e4SLinus Torvalds 2331da177e4SLinus Torvalds void 2341da177e4SLinus Torvalds nfs4_put_delegation(struct nfs4_delegation *dp) 2351da177e4SLinus Torvalds { 2361da177e4SLinus Torvalds if (atomic_dec_and_test(&dp->dl_count)) { 2371da177e4SLinus Torvalds dprintk("NFSD: freeing dp %p\n",dp); 23813cd2184SNeilBrown put_nfs4_file(dp->dl_file); 2395b2d21c1SNeilBrown kmem_cache_free(deleg_slab, dp); 240ef0f3390SNeilBrown num_delegations--; 2411da177e4SLinus Torvalds } 2421da177e4SLinus Torvalds } 2431da177e4SLinus Torvalds 2441da177e4SLinus Torvalds /* Remove the associated file_lock first, then remove the delegation. 2451da177e4SLinus Torvalds * lease_modify() is called to remove the FS_LEASE file_lock from 2461da177e4SLinus Torvalds * the i_flock list, eventually calling nfsd's lock_manager 2471da177e4SLinus Torvalds * fl_release_callback. 2481da177e4SLinus Torvalds */ 2491da177e4SLinus Torvalds static void 2501da177e4SLinus Torvalds nfs4_close_delegation(struct nfs4_delegation *dp) 2511da177e4SLinus Torvalds { 2521da177e4SLinus Torvalds struct file *filp = dp->dl_vfs_file; 2531da177e4SLinus Torvalds 2541da177e4SLinus Torvalds dprintk("NFSD: close_delegation dp %p\n",dp); 2551da177e4SLinus Torvalds dp->dl_vfs_file = NULL; 2561da177e4SLinus Torvalds /* The following nfsd_close may not actually close the file, 2571da177e4SLinus Torvalds * but we want to remove the lease in any case. */ 258c907132dSNeilBrown if (dp->dl_flock) 259a9933ceaSJ. Bruce Fields vfs_setlease(filp, F_UNLCK, &dp->dl_flock); 2601da177e4SLinus Torvalds nfsd_close(filp); 2611da177e4SLinus Torvalds } 2621da177e4SLinus Torvalds 2631da177e4SLinus Torvalds /* Called under the state lock. */ 2641da177e4SLinus Torvalds static void 2651da177e4SLinus Torvalds unhash_delegation(struct nfs4_delegation *dp) 2661da177e4SLinus Torvalds { 267ea1da636SNeilBrown list_del_init(&dp->dl_perfile); 268ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 2691da177e4SLinus Torvalds spin_lock(&recall_lock); 2701da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 2711da177e4SLinus Torvalds spin_unlock(&recall_lock); 2721da177e4SLinus Torvalds nfs4_close_delegation(dp); 2731da177e4SLinus Torvalds nfs4_put_delegation(dp); 2741da177e4SLinus Torvalds } 2751da177e4SLinus Torvalds 2761da177e4SLinus Torvalds /* 2771da177e4SLinus Torvalds * SETCLIENTID state 2781da177e4SLinus Torvalds */ 2791da177e4SLinus Torvalds 2801da177e4SLinus Torvalds /* Hash tables for nfs4_clientid state */ 2811da177e4SLinus Torvalds #define CLIENT_HASH_BITS 4 2821da177e4SLinus Torvalds #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 2831da177e4SLinus Torvalds #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 2841da177e4SLinus Torvalds 2851da177e4SLinus Torvalds #define clientid_hashval(id) \ 2861da177e4SLinus Torvalds ((id) & CLIENT_HASH_MASK) 287a55370a3SNeilBrown #define clientstr_hashval(name) \ 288a55370a3SNeilBrown (opaque_hashval((name), 8) & CLIENT_HASH_MASK) 2891da177e4SLinus Torvalds /* 2901da177e4SLinus Torvalds * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 2911da177e4SLinus Torvalds * used in reboot/reset lease grace period processing 2921da177e4SLinus Torvalds * 2931da177e4SLinus Torvalds * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed 2941da177e4SLinus Torvalds * setclientid_confirmed info. 2951da177e4SLinus Torvalds * 2961da177e4SLinus Torvalds * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed 2971da177e4SLinus Torvalds * setclientid info. 2981da177e4SLinus Torvalds * 2991da177e4SLinus Torvalds * client_lru holds client queue ordered by nfs4_client.cl_time 3001da177e4SLinus Torvalds * for lease renewal. 3011da177e4SLinus Torvalds * 3021da177e4SLinus Torvalds * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 3031da177e4SLinus Torvalds * for last close replay. 3041da177e4SLinus Torvalds */ 3051da177e4SLinus Torvalds static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; 3061da177e4SLinus Torvalds static int reclaim_str_hashtbl_size = 0; 3071da177e4SLinus Torvalds static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; 3081da177e4SLinus Torvalds static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; 3091da177e4SLinus Torvalds static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; 3101da177e4SLinus Torvalds static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; 3111da177e4SLinus Torvalds static struct list_head client_lru; 3121da177e4SLinus Torvalds static struct list_head close_lru; 3131da177e4SLinus Torvalds 3141da177e4SLinus Torvalds static inline void 3151da177e4SLinus Torvalds renew_client(struct nfs4_client *clp) 3161da177e4SLinus Torvalds { 3171da177e4SLinus Torvalds /* 3181da177e4SLinus Torvalds * Move client to the end to the LRU list. 3191da177e4SLinus Torvalds */ 3201da177e4SLinus Torvalds dprintk("renewing client (clientid %08x/%08x)\n", 3211da177e4SLinus Torvalds clp->cl_clientid.cl_boot, 3221da177e4SLinus Torvalds clp->cl_clientid.cl_id); 3231da177e4SLinus Torvalds list_move_tail(&clp->cl_lru, &client_lru); 3241da177e4SLinus Torvalds clp->cl_time = get_seconds(); 3251da177e4SLinus Torvalds } 3261da177e4SLinus Torvalds 3271da177e4SLinus Torvalds /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ 3281da177e4SLinus Torvalds static int 3291da177e4SLinus Torvalds STALE_CLIENTID(clientid_t *clid) 3301da177e4SLinus Torvalds { 3311da177e4SLinus Torvalds if (clid->cl_boot == boot_time) 3321da177e4SLinus Torvalds return 0; 3331da177e4SLinus Torvalds dprintk("NFSD stale clientid (%08x/%08x)\n", 3341da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 3351da177e4SLinus Torvalds return 1; 3361da177e4SLinus Torvalds } 3371da177e4SLinus Torvalds 3381da177e4SLinus Torvalds /* 3391da177e4SLinus Torvalds * XXX Should we use a slab cache ? 3401da177e4SLinus Torvalds * This type of memory management is somewhat inefficient, but we use it 3411da177e4SLinus Torvalds * anyway since SETCLIENTID is not a common operation. 3421da177e4SLinus Torvalds */ 34335bba9a3SJ. Bruce Fields static struct nfs4_client *alloc_client(struct xdr_netobj name) 3441da177e4SLinus Torvalds { 3451da177e4SLinus Torvalds struct nfs4_client *clp; 3461da177e4SLinus Torvalds 34735bba9a3SJ. Bruce Fields clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); 34835bba9a3SJ. Bruce Fields if (clp == NULL) 34935bba9a3SJ. Bruce Fields return NULL; 35035bba9a3SJ. Bruce Fields clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); 35135bba9a3SJ. Bruce Fields if (clp->cl_name.data == NULL) { 35235bba9a3SJ. Bruce Fields kfree(clp); 35335bba9a3SJ. Bruce Fields return NULL; 35435bba9a3SJ. Bruce Fields } 3551da177e4SLinus Torvalds memcpy(clp->cl_name.data, name.data, name.len); 3561da177e4SLinus Torvalds clp->cl_name.len = name.len; 3571da177e4SLinus Torvalds return clp; 3581da177e4SLinus Torvalds } 3591da177e4SLinus Torvalds 3601b1a9b31SJ. Bruce Fields static void 3611b1a9b31SJ. Bruce Fields shutdown_callback_client(struct nfs4_client *clp) 3621b1a9b31SJ. Bruce Fields { 3631b1a9b31SJ. Bruce Fields struct rpc_clnt *clnt = clp->cl_callback.cb_client; 3641b1a9b31SJ. Bruce Fields 3651b1a9b31SJ. Bruce Fields if (clnt) { 366404ec117SJ. Bruce Fields /* 367404ec117SJ. Bruce Fields * Callback threads take a reference on the client, so there 368404ec117SJ. Bruce Fields * should be no outstanding callbacks at this point. 369404ec117SJ. Bruce Fields */ 3701b1a9b31SJ. Bruce Fields clp->cl_callback.cb_client = NULL; 3711b1a9b31SJ. Bruce Fields rpc_shutdown_client(clnt); 3721b1a9b31SJ. Bruce Fields } 3731b1a9b31SJ. Bruce Fields } 3741b1a9b31SJ. Bruce Fields 3751da177e4SLinus Torvalds static inline void 3761da177e4SLinus Torvalds free_client(struct nfs4_client *clp) 3771da177e4SLinus Torvalds { 3781b1a9b31SJ. Bruce Fields shutdown_callback_client(clp); 3791da177e4SLinus Torvalds if (clp->cl_cred.cr_group_info) 3801da177e4SLinus Torvalds put_group_info(clp->cl_cred.cr_group_info); 38168e76ad0SOlga Kornievskaia kfree(clp->cl_principal); 3821da177e4SLinus Torvalds kfree(clp->cl_name.data); 3831da177e4SLinus Torvalds kfree(clp); 3841da177e4SLinus Torvalds } 3851da177e4SLinus Torvalds 3861da177e4SLinus Torvalds void 3871da177e4SLinus Torvalds put_nfs4_client(struct nfs4_client *clp) 3881da177e4SLinus Torvalds { 3891da177e4SLinus Torvalds if (atomic_dec_and_test(&clp->cl_count)) 3901da177e4SLinus Torvalds free_client(clp); 3911da177e4SLinus Torvalds } 3921da177e4SLinus Torvalds 3931da177e4SLinus Torvalds static void 3941da177e4SLinus Torvalds expire_client(struct nfs4_client *clp) 3951da177e4SLinus Torvalds { 3961da177e4SLinus Torvalds struct nfs4_stateowner *sop; 3971da177e4SLinus Torvalds struct nfs4_delegation *dp; 3981da177e4SLinus Torvalds struct list_head reaplist; 3991da177e4SLinus Torvalds 4001da177e4SLinus Torvalds dprintk("NFSD: expire_client cl_count %d\n", 4011da177e4SLinus Torvalds atomic_read(&clp->cl_count)); 4021da177e4SLinus Torvalds 4031da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 4041da177e4SLinus Torvalds spin_lock(&recall_lock); 405ea1da636SNeilBrown while (!list_empty(&clp->cl_delegations)) { 406ea1da636SNeilBrown dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); 4071da177e4SLinus Torvalds dprintk("NFSD: expire client. dp %p, fp %p\n", dp, 4081da177e4SLinus Torvalds dp->dl_flock); 409ea1da636SNeilBrown list_del_init(&dp->dl_perclnt); 4101da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 4111da177e4SLinus Torvalds } 4121da177e4SLinus Torvalds spin_unlock(&recall_lock); 4131da177e4SLinus Torvalds while (!list_empty(&reaplist)) { 4141da177e4SLinus Torvalds dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); 4151da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 4161da177e4SLinus Torvalds unhash_delegation(dp); 4171da177e4SLinus Torvalds } 4181da177e4SLinus Torvalds list_del(&clp->cl_idhash); 4191da177e4SLinus Torvalds list_del(&clp->cl_strhash); 4201da177e4SLinus Torvalds list_del(&clp->cl_lru); 421ea1da636SNeilBrown while (!list_empty(&clp->cl_openowners)) { 422ea1da636SNeilBrown sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); 4231da177e4SLinus Torvalds release_stateowner(sop); 4241da177e4SLinus Torvalds } 4251da177e4SLinus Torvalds put_nfs4_client(clp); 4261da177e4SLinus Torvalds } 4271da177e4SLinus Torvalds 42835bba9a3SJ. Bruce Fields static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) 42935bba9a3SJ. Bruce Fields { 4301da177e4SLinus Torvalds struct nfs4_client *clp; 4311da177e4SLinus Torvalds 43235bba9a3SJ. Bruce Fields clp = alloc_client(name); 43335bba9a3SJ. Bruce Fields if (clp == NULL) 43435bba9a3SJ. Bruce Fields return NULL; 435a55370a3SNeilBrown memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); 4361da177e4SLinus Torvalds atomic_set(&clp->cl_count, 1); 4371da177e4SLinus Torvalds atomic_set(&clp->cl_callback.cb_set, 0); 4381da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_idhash); 4391da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_strhash); 440ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_openowners); 441ea1da636SNeilBrown INIT_LIST_HEAD(&clp->cl_delegations); 4421da177e4SLinus Torvalds INIT_LIST_HEAD(&clp->cl_lru); 4431da177e4SLinus Torvalds return clp; 4441da177e4SLinus Torvalds } 4451da177e4SLinus Torvalds 44635bba9a3SJ. Bruce Fields static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) 44735bba9a3SJ. Bruce Fields { 44835bba9a3SJ. Bruce Fields memcpy(target->cl_verifier.data, source->data, 44935bba9a3SJ. Bruce Fields sizeof(target->cl_verifier.data)); 4501da177e4SLinus Torvalds } 4511da177e4SLinus Torvalds 45235bba9a3SJ. Bruce Fields static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) 45335bba9a3SJ. Bruce Fields { 4541da177e4SLinus Torvalds target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; 4551da177e4SLinus Torvalds target->cl_clientid.cl_id = source->cl_clientid.cl_id; 4561da177e4SLinus Torvalds } 4571da177e4SLinus Torvalds 45835bba9a3SJ. Bruce Fields static void copy_cred(struct svc_cred *target, struct svc_cred *source) 45935bba9a3SJ. Bruce Fields { 4601da177e4SLinus Torvalds target->cr_uid = source->cr_uid; 4611da177e4SLinus Torvalds target->cr_gid = source->cr_gid; 4621da177e4SLinus Torvalds target->cr_group_info = source->cr_group_info; 4631da177e4SLinus Torvalds get_group_info(target->cr_group_info); 4641da177e4SLinus Torvalds } 4651da177e4SLinus Torvalds 46635bba9a3SJ. Bruce Fields static int same_name(const char *n1, const char *n2) 467599e0a22SJ. Bruce Fields { 468a55370a3SNeilBrown return 0 == memcmp(n1, n2, HEXDIR_LEN); 4691da177e4SLinus Torvalds } 4701da177e4SLinus Torvalds 4711da177e4SLinus Torvalds static int 472599e0a22SJ. Bruce Fields same_verf(nfs4_verifier *v1, nfs4_verifier *v2) 473599e0a22SJ. Bruce Fields { 474599e0a22SJ. Bruce Fields return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); 4751da177e4SLinus Torvalds } 4761da177e4SLinus Torvalds 4771da177e4SLinus Torvalds static int 478599e0a22SJ. Bruce Fields same_clid(clientid_t *cl1, clientid_t *cl2) 479599e0a22SJ. Bruce Fields { 480599e0a22SJ. Bruce Fields return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); 4811da177e4SLinus Torvalds } 4821da177e4SLinus Torvalds 4831da177e4SLinus Torvalds /* XXX what about NGROUP */ 4841da177e4SLinus Torvalds static int 485599e0a22SJ. Bruce Fields same_creds(struct svc_cred *cr1, struct svc_cred *cr2) 486599e0a22SJ. Bruce Fields { 487599e0a22SJ. Bruce Fields return cr1->cr_uid == cr2->cr_uid; 4881da177e4SLinus Torvalds } 4891da177e4SLinus Torvalds 4905ec7b46cSJ. Bruce Fields static void gen_clid(struct nfs4_client *clp) 4915ec7b46cSJ. Bruce Fields { 4925ec7b46cSJ. Bruce Fields static u32 current_clientid = 1; 4935ec7b46cSJ. Bruce Fields 4941da177e4SLinus Torvalds clp->cl_clientid.cl_boot = boot_time; 4951da177e4SLinus Torvalds clp->cl_clientid.cl_id = current_clientid++; 4961da177e4SLinus Torvalds } 4971da177e4SLinus Torvalds 498deda2faaSJ. Bruce Fields static void gen_confirm(struct nfs4_client *clp) 499deda2faaSJ. Bruce Fields { 500deda2faaSJ. Bruce Fields static u32 i; 5011da177e4SLinus Torvalds u32 *p; 5021da177e4SLinus Torvalds 5031da177e4SLinus Torvalds p = (u32 *)clp->cl_confirm.data; 504deda2faaSJ. Bruce Fields *p++ = get_seconds(); 505deda2faaSJ. Bruce Fields *p++ = i++; 5061da177e4SLinus Torvalds } 5071da177e4SLinus Torvalds 50835bba9a3SJ. Bruce Fields static int check_name(struct xdr_netobj name) 50935bba9a3SJ. Bruce Fields { 5101da177e4SLinus Torvalds if (name.len == 0) 5111da177e4SLinus Torvalds return 0; 5121da177e4SLinus Torvalds if (name.len > NFS4_OPAQUE_LIMIT) { 5132fdada03SJ. Bruce Fields dprintk("NFSD: check_name: name too long(%d)!\n", name.len); 5141da177e4SLinus Torvalds return 0; 5151da177e4SLinus Torvalds } 5161da177e4SLinus Torvalds return 1; 5171da177e4SLinus Torvalds } 5181da177e4SLinus Torvalds 519fd39ca9aSNeilBrown static void 5201da177e4SLinus Torvalds add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) 5211da177e4SLinus Torvalds { 5221da177e4SLinus Torvalds unsigned int idhashval; 5231da177e4SLinus Torvalds 5241da177e4SLinus Torvalds list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); 5251da177e4SLinus Torvalds idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5261da177e4SLinus Torvalds list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); 5271da177e4SLinus Torvalds list_add_tail(&clp->cl_lru, &client_lru); 5281da177e4SLinus Torvalds clp->cl_time = get_seconds(); 5291da177e4SLinus Torvalds } 5301da177e4SLinus Torvalds 531fd39ca9aSNeilBrown static void 5321da177e4SLinus Torvalds move_to_confirmed(struct nfs4_client *clp) 5331da177e4SLinus Torvalds { 5341da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); 5351da177e4SLinus Torvalds unsigned int strhashval; 5361da177e4SLinus Torvalds 5371da177e4SLinus Torvalds dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); 5381da177e4SLinus Torvalds list_del_init(&clp->cl_strhash); 539f116629dSAkinobu Mita list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); 540a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 5411da177e4SLinus Torvalds list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); 5421da177e4SLinus Torvalds renew_client(clp); 5431da177e4SLinus Torvalds } 5441da177e4SLinus Torvalds 5451da177e4SLinus Torvalds static struct nfs4_client * 5461da177e4SLinus Torvalds find_confirmed_client(clientid_t *clid) 5471da177e4SLinus Torvalds { 5481da177e4SLinus Torvalds struct nfs4_client *clp; 5491da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5501da177e4SLinus Torvalds 5511da177e4SLinus Torvalds list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { 552599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 5531da177e4SLinus Torvalds return clp; 5541da177e4SLinus Torvalds } 5551da177e4SLinus Torvalds return NULL; 5561da177e4SLinus Torvalds } 5571da177e4SLinus Torvalds 5581da177e4SLinus Torvalds static struct nfs4_client * 5591da177e4SLinus Torvalds find_unconfirmed_client(clientid_t *clid) 5601da177e4SLinus Torvalds { 5611da177e4SLinus Torvalds struct nfs4_client *clp; 5621da177e4SLinus Torvalds unsigned int idhashval = clientid_hashval(clid->cl_id); 5631da177e4SLinus Torvalds 5641da177e4SLinus Torvalds list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { 565599e0a22SJ. Bruce Fields if (same_clid(&clp->cl_clientid, clid)) 5661da177e4SLinus Torvalds return clp; 5671da177e4SLinus Torvalds } 5681da177e4SLinus Torvalds return NULL; 5691da177e4SLinus Torvalds } 5701da177e4SLinus Torvalds 57128ce6054SNeilBrown static struct nfs4_client * 57228ce6054SNeilBrown find_confirmed_client_by_str(const char *dname, unsigned int hashval) 57328ce6054SNeilBrown { 57428ce6054SNeilBrown struct nfs4_client *clp; 57528ce6054SNeilBrown 57628ce6054SNeilBrown list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { 57728ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 57828ce6054SNeilBrown return clp; 57928ce6054SNeilBrown } 58028ce6054SNeilBrown return NULL; 58128ce6054SNeilBrown } 58228ce6054SNeilBrown 58328ce6054SNeilBrown static struct nfs4_client * 58428ce6054SNeilBrown find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) 58528ce6054SNeilBrown { 58628ce6054SNeilBrown struct nfs4_client *clp; 58728ce6054SNeilBrown 58828ce6054SNeilBrown list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { 58928ce6054SNeilBrown if (same_name(clp->cl_recdir, dname)) 59028ce6054SNeilBrown return clp; 59128ce6054SNeilBrown } 59228ce6054SNeilBrown return NULL; 59328ce6054SNeilBrown } 59428ce6054SNeilBrown 5951da177e4SLinus Torvalds /* a helper function for parse_callback */ 5961da177e4SLinus Torvalds static int 5971da177e4SLinus Torvalds parse_octet(unsigned int *lenp, char **addrp) 5981da177e4SLinus Torvalds { 5991da177e4SLinus Torvalds unsigned int len = *lenp; 6001da177e4SLinus Torvalds char *p = *addrp; 6011da177e4SLinus Torvalds int n = -1; 6021da177e4SLinus Torvalds char c; 6031da177e4SLinus Torvalds 6041da177e4SLinus Torvalds for (;;) { 6051da177e4SLinus Torvalds if (!len) 6061da177e4SLinus Torvalds break; 6071da177e4SLinus Torvalds len--; 6081da177e4SLinus Torvalds c = *p++; 6091da177e4SLinus Torvalds if (c == '.') 6101da177e4SLinus Torvalds break; 6111da177e4SLinus Torvalds if ((c < '0') || (c > '9')) { 6121da177e4SLinus Torvalds n = -1; 6131da177e4SLinus Torvalds break; 6141da177e4SLinus Torvalds } 6151da177e4SLinus Torvalds if (n < 0) 6161da177e4SLinus Torvalds n = 0; 6171da177e4SLinus Torvalds n = (n * 10) + (c - '0'); 6181da177e4SLinus Torvalds if (n > 255) { 6191da177e4SLinus Torvalds n = -1; 6201da177e4SLinus Torvalds break; 6211da177e4SLinus Torvalds } 6221da177e4SLinus Torvalds } 6231da177e4SLinus Torvalds *lenp = len; 6241da177e4SLinus Torvalds *addrp = p; 6251da177e4SLinus Torvalds return n; 6261da177e4SLinus Torvalds } 6271da177e4SLinus Torvalds 6281da177e4SLinus Torvalds /* parse and set the setclientid ipv4 callback address */ 629fd39ca9aSNeilBrown static int 6301da177e4SLinus Torvalds parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) 6311da177e4SLinus Torvalds { 6321da177e4SLinus Torvalds int temp = 0; 6331da177e4SLinus Torvalds u32 cbaddr = 0; 6341da177e4SLinus Torvalds u16 cbport = 0; 6351da177e4SLinus Torvalds u32 addrlen = addr_len; 6361da177e4SLinus Torvalds char *addr = addr_val; 6371da177e4SLinus Torvalds int i, shift; 6381da177e4SLinus Torvalds 6391da177e4SLinus Torvalds /* ipaddress */ 6401da177e4SLinus Torvalds shift = 24; 6411da177e4SLinus Torvalds for(i = 4; i > 0 ; i--) { 6421da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6431da177e4SLinus Torvalds return 0; 6441da177e4SLinus Torvalds } 6451da177e4SLinus Torvalds cbaddr |= (temp << shift); 6461da177e4SLinus Torvalds if (shift > 0) 6471da177e4SLinus Torvalds shift -= 8; 6481da177e4SLinus Torvalds } 6491da177e4SLinus Torvalds *cbaddrp = cbaddr; 6501da177e4SLinus Torvalds 6511da177e4SLinus Torvalds /* port */ 6521da177e4SLinus Torvalds shift = 8; 6531da177e4SLinus Torvalds for(i = 2; i > 0 ; i--) { 6541da177e4SLinus Torvalds if ((temp = parse_octet(&addrlen, &addr)) < 0) { 6551da177e4SLinus Torvalds return 0; 6561da177e4SLinus Torvalds } 6571da177e4SLinus Torvalds cbport |= (temp << shift); 6581da177e4SLinus Torvalds if (shift > 0) 6591da177e4SLinus Torvalds shift -= 8; 6601da177e4SLinus Torvalds } 6611da177e4SLinus Torvalds *cbportp = cbport; 6621da177e4SLinus Torvalds return 1; 6631da177e4SLinus Torvalds } 6641da177e4SLinus Torvalds 665fd39ca9aSNeilBrown static void 6661da177e4SLinus Torvalds gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) 6671da177e4SLinus Torvalds { 6681da177e4SLinus Torvalds struct nfs4_callback *cb = &clp->cl_callback; 6691da177e4SLinus Torvalds 6701da177e4SLinus Torvalds /* Currently, we only support tcp for the callback channel */ 6711da177e4SLinus Torvalds if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) 6721da177e4SLinus Torvalds goto out_err; 6731da177e4SLinus Torvalds 6741da177e4SLinus Torvalds if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, 6751da177e4SLinus Torvalds &cb->cb_addr, &cb->cb_port))) 6761da177e4SLinus Torvalds goto out_err; 6771da177e4SLinus Torvalds cb->cb_prog = se->se_callback_prog; 6781da177e4SLinus Torvalds cb->cb_ident = se->se_callback_ident; 6791da177e4SLinus Torvalds return; 6801da177e4SLinus Torvalds out_err: 681849823c5SNeil Brown dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " 6821da177e4SLinus Torvalds "will not receive delegations\n", 6831da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 6841da177e4SLinus Torvalds 6851da177e4SLinus Torvalds return; 6861da177e4SLinus Torvalds } 6871da177e4SLinus Torvalds 688b37ad28bSAl Viro __be32 689b591480bSJ.Bruce Fields nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 690b591480bSJ.Bruce Fields struct nfsd4_setclientid *setclid) 6911da177e4SLinus Torvalds { 69227459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 6931da177e4SLinus Torvalds struct xdr_netobj clname = { 6941da177e4SLinus Torvalds .len = setclid->se_namelen, 6951da177e4SLinus Torvalds .data = setclid->se_name, 6961da177e4SLinus Torvalds }; 6971da177e4SLinus Torvalds nfs4_verifier clverifier = setclid->se_verf; 6981da177e4SLinus Torvalds unsigned int strhashval; 69928ce6054SNeilBrown struct nfs4_client *conf, *unconf, *new; 700b37ad28bSAl Viro __be32 status; 70168e76ad0SOlga Kornievskaia char *princ; 702a55370a3SNeilBrown char dname[HEXDIR_LEN]; 7031da177e4SLinus Torvalds 7041da177e4SLinus Torvalds if (!check_name(clname)) 70573aea4ecSNeil Brown return nfserr_inval; 7061da177e4SLinus Torvalds 707a55370a3SNeilBrown status = nfs4_make_rec_clidname(dname, &clname); 708a55370a3SNeilBrown if (status) 70973aea4ecSNeil Brown return status; 710a55370a3SNeilBrown 7111da177e4SLinus Torvalds /* 7121da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 7131da177e4SLinus Torvalds * We get here on a DRC miss. 7141da177e4SLinus Torvalds */ 7151da177e4SLinus Torvalds 716a55370a3SNeilBrown strhashval = clientstr_hashval(dname); 7171da177e4SLinus Torvalds 7181da177e4SLinus Torvalds nfs4_lock_state(); 71928ce6054SNeilBrown conf = find_confirmed_client_by_str(dname, strhashval); 72028ce6054SNeilBrown if (conf) { 721a186e767SJ. Bruce Fields /* RFC 3530 14.2.33 CASE 0: */ 7221da177e4SLinus Torvalds status = nfserr_clid_inuse; 723599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) 72427459f09SChuck Lever || conf->cl_addr != sin->sin_addr.s_addr) { 72521315eddSBruce Fields dprintk("NFSD: setclientid: string in use by client" 72621315eddSBruce Fields "at %u.%u.%u.%u\n", NIPQUAD(conf->cl_addr)); 7271da177e4SLinus Torvalds goto out; 7281da177e4SLinus Torvalds } 7291da177e4SLinus Torvalds } 730a186e767SJ. Bruce Fields /* 731a186e767SJ. Bruce Fields * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") 732a186e767SJ. Bruce Fields * has a description of SETCLIENTID request processing consisting 733a186e767SJ. Bruce Fields * of 5 bullet points, labeled as CASE0 - CASE4 below. 734a186e767SJ. Bruce Fields */ 73528ce6054SNeilBrown unconf = find_unconfirmed_client_by_str(dname, strhashval); 7361da177e4SLinus Torvalds status = nfserr_resource; 7371da177e4SLinus Torvalds if (!conf) { 7381da177e4SLinus Torvalds /* 739a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 4: 740a186e767SJ. Bruce Fields * placed first, because it is the normal case 7411da177e4SLinus Torvalds */ 7421da177e4SLinus Torvalds if (unconf) 7431da177e4SLinus Torvalds expire_client(unconf); 744a55370a3SNeilBrown new = create_client(clname, dname); 745a55370a3SNeilBrown if (new == NULL) 7461da177e4SLinus Torvalds goto out; 7471da177e4SLinus Torvalds gen_clid(new); 748599e0a22SJ. Bruce Fields } else if (same_verf(&conf->cl_verifier, &clverifier)) { 7491da177e4SLinus Torvalds /* 750a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 1: 751a186e767SJ. Bruce Fields * probable callback update 7521da177e4SLinus Torvalds */ 75331f4a6c1SNeilBrown if (unconf) { 75431f4a6c1SNeilBrown /* Note this is removing unconfirmed {*x***}, 75531f4a6c1SNeilBrown * which is stronger than RFC recommended {vxc**}. 75631f4a6c1SNeilBrown * This has the advantage that there is at most 75731f4a6c1SNeilBrown * one {*x***} in either list at any time. 75831f4a6c1SNeilBrown */ 7591da177e4SLinus Torvalds expire_client(unconf); 7601da177e4SLinus Torvalds } 761a55370a3SNeilBrown new = create_client(clname, dname); 762a55370a3SNeilBrown if (new == NULL) 7631da177e4SLinus Torvalds goto out; 7641da177e4SLinus Torvalds copy_clid(new, conf); 7651da177e4SLinus Torvalds } else if (!unconf) { 7661da177e4SLinus Torvalds /* 767a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 2: 768a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 769a186e767SJ. Bruce Fields * confirmed. 7701da177e4SLinus Torvalds */ 771a55370a3SNeilBrown new = create_client(clname, dname); 772a55370a3SNeilBrown if (new == NULL) 7731da177e4SLinus Torvalds goto out; 7741da177e4SLinus Torvalds gen_clid(new); 77549ba8781SJ. Bruce Fields } else { 7761da177e4SLinus Torvalds /* 777a186e767SJ. Bruce Fields * RFC 3530 14.2.33 CASE 3: 778a186e767SJ. Bruce Fields * probable client reboot; state will be removed if 779a186e767SJ. Bruce Fields * confirmed. 7801da177e4SLinus Torvalds */ 7811da177e4SLinus Torvalds expire_client(unconf); 782a55370a3SNeilBrown new = create_client(clname, dname); 783a55370a3SNeilBrown if (new == NULL) 7841da177e4SLinus Torvalds goto out; 7851da177e4SLinus Torvalds gen_clid(new); 7861da177e4SLinus Torvalds } 787c175b83cSJ. Bruce Fields copy_verf(new, &clverifier); 788c175b83cSJ. Bruce Fields new->cl_addr = sin->sin_addr.s_addr; 78961054b14SOlga Kornievskaia new->cl_flavor = rqstp->rq_flavor; 79068e76ad0SOlga Kornievskaia princ = svc_gss_principal(rqstp); 79168e76ad0SOlga Kornievskaia if (princ) { 79268e76ad0SOlga Kornievskaia new->cl_principal = kstrdup(princ, GFP_KERNEL); 79368e76ad0SOlga Kornievskaia if (new->cl_principal == NULL) { 79468e76ad0SOlga Kornievskaia free_client(new); 79568e76ad0SOlga Kornievskaia goto out; 79668e76ad0SOlga Kornievskaia } 79768e76ad0SOlga Kornievskaia } 798c175b83cSJ. Bruce Fields copy_cred(&new->cl_cred, &rqstp->rq_cred); 799c175b83cSJ. Bruce Fields gen_confirm(new); 800c175b83cSJ. Bruce Fields gen_callback(new, setclid); 801c175b83cSJ. Bruce Fields add_to_unconfirmed(new, strhashval); 8021da177e4SLinus Torvalds setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; 8031da177e4SLinus Torvalds setclid->se_clientid.cl_id = new->cl_clientid.cl_id; 8041da177e4SLinus Torvalds memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); 8051da177e4SLinus Torvalds status = nfs_ok; 8061da177e4SLinus Torvalds out: 8071da177e4SLinus Torvalds nfs4_unlock_state(); 8081da177e4SLinus Torvalds return status; 8091da177e4SLinus Torvalds } 8101da177e4SLinus Torvalds 8111da177e4SLinus Torvalds 8121da177e4SLinus Torvalds /* 813a186e767SJ. Bruce Fields * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has 814a186e767SJ. Bruce Fields * a description of SETCLIENTID_CONFIRM request processing consisting of 4 815a186e767SJ. Bruce Fields * bullets, labeled as CASE1 - CASE4 below. 8161da177e4SLinus Torvalds */ 817b37ad28bSAl Viro __be32 818b591480bSJ.Bruce Fields nfsd4_setclientid_confirm(struct svc_rqst *rqstp, 819b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 820b591480bSJ.Bruce Fields struct nfsd4_setclientid_confirm *setclientid_confirm) 8211da177e4SLinus Torvalds { 82227459f09SChuck Lever struct sockaddr_in *sin = svc_addr_in(rqstp); 82321ab45a4SNeilBrown struct nfs4_client *conf, *unconf; 8241da177e4SLinus Torvalds nfs4_verifier confirm = setclientid_confirm->sc_confirm; 8251da177e4SLinus Torvalds clientid_t * clid = &setclientid_confirm->sc_clientid; 826b37ad28bSAl Viro __be32 status; 8271da177e4SLinus Torvalds 8281da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 8291da177e4SLinus Torvalds return nfserr_stale_clientid; 8301da177e4SLinus Torvalds /* 8311da177e4SLinus Torvalds * XXX The Duplicate Request Cache (DRC) has been checked (??) 8321da177e4SLinus Torvalds * We get here on a DRC miss. 8331da177e4SLinus Torvalds */ 8341da177e4SLinus Torvalds 8351da177e4SLinus Torvalds nfs4_lock_state(); 83621ab45a4SNeilBrown 83721ab45a4SNeilBrown conf = find_confirmed_client(clid); 83821ab45a4SNeilBrown unconf = find_unconfirmed_client(clid); 83921ab45a4SNeilBrown 84022de4d83SNeilBrown status = nfserr_clid_inuse; 84127459f09SChuck Lever if (conf && conf->cl_addr != sin->sin_addr.s_addr) 8421da177e4SLinus Torvalds goto out; 84327459f09SChuck Lever if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) 8441da177e4SLinus Torvalds goto out; 84521ab45a4SNeilBrown 846a186e767SJ. Bruce Fields /* 847a186e767SJ. Bruce Fields * section 14.2.34 of RFC 3530 has a description of 848a186e767SJ. Bruce Fields * SETCLIENTID_CONFIRM request processing consisting 849a186e767SJ. Bruce Fields * of 4 bullet points, labeled as CASE1 - CASE4 below. 850a186e767SJ. Bruce Fields */ 851366e0c1dSJ. Bruce Fields if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { 852a186e767SJ. Bruce Fields /* 853a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 1: 854a186e767SJ. Bruce Fields * callback update 8557c79f737SNeilBrown */ 856599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) 8571da177e4SLinus Torvalds status = nfserr_clid_inuse; 8581da177e4SLinus Torvalds else { 8591a69c179SNeilBrown /* XXX: We just turn off callbacks until we can handle 8601a69c179SNeilBrown * change request correctly. */ 861cb36d634SNeilBrown atomic_set(&conf->cl_callback.cb_set, 0); 86221ab45a4SNeilBrown gen_confirm(conf); 86346309029SNeilBrown nfsd4_remove_clid_dir(unconf); 8641a69c179SNeilBrown expire_client(unconf); 8651da177e4SLinus Torvalds status = nfs_ok; 8661a69c179SNeilBrown 8671da177e4SLinus Torvalds } 868f3aba4e5SJ. Bruce Fields } else if (conf && !unconf) { 869a186e767SJ. Bruce Fields /* 870a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 2: 871a186e767SJ. Bruce Fields * probable retransmitted request; play it safe and 872a186e767SJ. Bruce Fields * do nothing. 8737c79f737SNeilBrown */ 874599e0a22SJ. Bruce Fields if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) 8751da177e4SLinus Torvalds status = nfserr_clid_inuse; 87621ab45a4SNeilBrown else 8771da177e4SLinus Torvalds status = nfs_ok; 8787c79f737SNeilBrown } else if (!conf && unconf 879599e0a22SJ. Bruce Fields && same_verf(&unconf->cl_confirm, &confirm)) { 880a186e767SJ. Bruce Fields /* 881a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 3: 882a186e767SJ. Bruce Fields * Normal case; new or rebooted client: 8831da177e4SLinus Torvalds */ 884599e0a22SJ. Bruce Fields if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { 8851da177e4SLinus Torvalds status = nfserr_clid_inuse; 8861da177e4SLinus Torvalds } else { 8871a69c179SNeilBrown unsigned int hash = 8881a69c179SNeilBrown clientstr_hashval(unconf->cl_recdir); 8891a69c179SNeilBrown conf = find_confirmed_client_by_str(unconf->cl_recdir, 8901a69c179SNeilBrown hash); 8911a69c179SNeilBrown if (conf) { 892c7b9a459SNeilBrown nfsd4_remove_clid_dir(conf); 8931a69c179SNeilBrown expire_client(conf); 8941a69c179SNeilBrown } 8951da177e4SLinus Torvalds move_to_confirmed(unconf); 89621ab45a4SNeilBrown conf = unconf; 89746f8a64bSJ. Bruce Fields nfsd4_probe_callback(conf); 8981a69c179SNeilBrown status = nfs_ok; 8991da177e4SLinus Torvalds } 900599e0a22SJ. Bruce Fields } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) 901599e0a22SJ. Bruce Fields && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, 9027c79f737SNeilBrown &confirm)))) { 903a186e767SJ. Bruce Fields /* 904a186e767SJ. Bruce Fields * RFC 3530 14.2.34 CASE 4: 905a186e767SJ. Bruce Fields * Client probably hasn't noticed that we rebooted yet. 9061da177e4SLinus Torvalds */ 9071da177e4SLinus Torvalds status = nfserr_stale_clientid; 9087c79f737SNeilBrown } else { 9091da177e4SLinus Torvalds /* check that we have hit one of the cases...*/ 91022de4d83SNeilBrown status = nfserr_clid_inuse; 91108e8987cSNeilBrown } 9121da177e4SLinus Torvalds out: 9131da177e4SLinus Torvalds nfs4_unlock_state(); 9141da177e4SLinus Torvalds return status; 9151da177e4SLinus Torvalds } 9161da177e4SLinus Torvalds 9171da177e4SLinus Torvalds /* OPEN Share state helper functions */ 9181da177e4SLinus Torvalds static inline struct nfs4_file * 9191da177e4SLinus Torvalds alloc_init_file(struct inode *ino) 9201da177e4SLinus Torvalds { 9211da177e4SLinus Torvalds struct nfs4_file *fp; 9221da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 9231da177e4SLinus Torvalds 924e60d4398SNeilBrown fp = kmem_cache_alloc(file_slab, GFP_KERNEL); 925e60d4398SNeilBrown if (fp) { 92613cd2184SNeilBrown kref_init(&fp->fi_ref); 9271da177e4SLinus Torvalds INIT_LIST_HEAD(&fp->fi_hash); 9288beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_stateids); 9298beefa24SNeilBrown INIT_LIST_HEAD(&fp->fi_delegations); 9301da177e4SLinus Torvalds list_add(&fp->fi_hash, &file_hashtbl[hashval]); 9311da177e4SLinus Torvalds fp->fi_inode = igrab(ino); 9321da177e4SLinus Torvalds fp->fi_id = current_fileid++; 93347f9940cSMeelap Shah fp->fi_had_conflict = false; 9341da177e4SLinus Torvalds return fp; 9351da177e4SLinus Torvalds } 9361da177e4SLinus Torvalds return NULL; 9371da177e4SLinus Torvalds } 9381da177e4SLinus Torvalds 9391da177e4SLinus Torvalds static void 940e18b890bSChristoph Lameter nfsd4_free_slab(struct kmem_cache **slab) 941e60d4398SNeilBrown { 942e60d4398SNeilBrown if (*slab == NULL) 943e60d4398SNeilBrown return; 9441a1d92c1SAlexey Dobriyan kmem_cache_destroy(*slab); 945e60d4398SNeilBrown *slab = NULL; 946e60d4398SNeilBrown } 947e60d4398SNeilBrown 948e8ff2a84SJ. Bruce Fields void 949e60d4398SNeilBrown nfsd4_free_slabs(void) 950e60d4398SNeilBrown { 951e60d4398SNeilBrown nfsd4_free_slab(&stateowner_slab); 952e60d4398SNeilBrown nfsd4_free_slab(&file_slab); 9535ac049acSNeilBrown nfsd4_free_slab(&stateid_slab); 9545b2d21c1SNeilBrown nfsd4_free_slab(&deleg_slab); 955e60d4398SNeilBrown } 9561da177e4SLinus Torvalds 9571da177e4SLinus Torvalds static int 9581da177e4SLinus Torvalds nfsd4_init_slabs(void) 9591da177e4SLinus Torvalds { 9601da177e4SLinus Torvalds stateowner_slab = kmem_cache_create("nfsd4_stateowners", 96120c2df83SPaul Mundt sizeof(struct nfs4_stateowner), 0, 0, NULL); 962e60d4398SNeilBrown if (stateowner_slab == NULL) 963e60d4398SNeilBrown goto out_nomem; 964e60d4398SNeilBrown file_slab = kmem_cache_create("nfsd4_files", 96520c2df83SPaul Mundt sizeof(struct nfs4_file), 0, 0, NULL); 966e60d4398SNeilBrown if (file_slab == NULL) 967e60d4398SNeilBrown goto out_nomem; 9685ac049acSNeilBrown stateid_slab = kmem_cache_create("nfsd4_stateids", 96920c2df83SPaul Mundt sizeof(struct nfs4_stateid), 0, 0, NULL); 9705ac049acSNeilBrown if (stateid_slab == NULL) 9715ac049acSNeilBrown goto out_nomem; 9725b2d21c1SNeilBrown deleg_slab = kmem_cache_create("nfsd4_delegations", 97320c2df83SPaul Mundt sizeof(struct nfs4_delegation), 0, 0, NULL); 9745b2d21c1SNeilBrown if (deleg_slab == NULL) 9755b2d21c1SNeilBrown goto out_nomem; 976e60d4398SNeilBrown return 0; 977e60d4398SNeilBrown out_nomem: 978e60d4398SNeilBrown nfsd4_free_slabs(); 9791da177e4SLinus Torvalds dprintk("nfsd4: out of memory while initializing nfsv4\n"); 9801da177e4SLinus Torvalds return -ENOMEM; 9811da177e4SLinus Torvalds } 9821da177e4SLinus Torvalds 9831da177e4SLinus Torvalds void 9841da177e4SLinus Torvalds nfs4_free_stateowner(struct kref *kref) 9851da177e4SLinus Torvalds { 9861da177e4SLinus Torvalds struct nfs4_stateowner *sop = 9871da177e4SLinus Torvalds container_of(kref, struct nfs4_stateowner, so_ref); 9881da177e4SLinus Torvalds kfree(sop->so_owner.data); 9891da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 9901da177e4SLinus Torvalds } 9911da177e4SLinus Torvalds 9921da177e4SLinus Torvalds static inline struct nfs4_stateowner * 9931da177e4SLinus Torvalds alloc_stateowner(struct xdr_netobj *owner) 9941da177e4SLinus Torvalds { 9951da177e4SLinus Torvalds struct nfs4_stateowner *sop; 9961da177e4SLinus Torvalds 9971da177e4SLinus Torvalds if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { 9981da177e4SLinus Torvalds if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { 9991da177e4SLinus Torvalds memcpy(sop->so_owner.data, owner->data, owner->len); 10001da177e4SLinus Torvalds sop->so_owner.len = owner->len; 10011da177e4SLinus Torvalds kref_init(&sop->so_ref); 10021da177e4SLinus Torvalds return sop; 10031da177e4SLinus Torvalds } 10041da177e4SLinus Torvalds kmem_cache_free(stateowner_slab, sop); 10051da177e4SLinus Torvalds } 10061da177e4SLinus Torvalds return NULL; 10071da177e4SLinus Torvalds } 10081da177e4SLinus Torvalds 10091da177e4SLinus Torvalds static struct nfs4_stateowner * 10101da177e4SLinus Torvalds alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { 10111da177e4SLinus Torvalds struct nfs4_stateowner *sop; 10121da177e4SLinus Torvalds struct nfs4_replay *rp; 10131da177e4SLinus Torvalds unsigned int idhashval; 10141da177e4SLinus Torvalds 10151da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&open->op_owner))) 10161da177e4SLinus Torvalds return NULL; 10171da177e4SLinus Torvalds idhashval = ownerid_hashval(current_ownerid); 10181da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 10191da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 10201da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 1021ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 1022ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ 10231da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); 10241da177e4SLinus Torvalds sop->so_time = 0; 10251da177e4SLinus Torvalds list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); 10261da177e4SLinus Torvalds list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); 1027ea1da636SNeilBrown list_add(&sop->so_perclient, &clp->cl_openowners); 10281da177e4SLinus Torvalds sop->so_is_open_owner = 1; 10291da177e4SLinus Torvalds sop->so_id = current_ownerid++; 10301da177e4SLinus Torvalds sop->so_client = clp; 10311da177e4SLinus Torvalds sop->so_seqid = open->op_seqid; 10321da177e4SLinus Torvalds sop->so_confirmed = 0; 10331da177e4SLinus Torvalds rp = &sop->so_replay; 1034de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 10351da177e4SLinus Torvalds rp->rp_buflen = 0; 10361da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 10371da177e4SLinus Torvalds return sop; 10381da177e4SLinus Torvalds } 10391da177e4SLinus Torvalds 10401da177e4SLinus Torvalds static void 10411da177e4SLinus Torvalds release_stateid_lockowners(struct nfs4_stateid *open_stp) 10421da177e4SLinus Torvalds { 10431da177e4SLinus Torvalds struct nfs4_stateowner *lock_sop; 10441da177e4SLinus Torvalds 1045ea1da636SNeilBrown while (!list_empty(&open_stp->st_lockowners)) { 1046ea1da636SNeilBrown lock_sop = list_entry(open_stp->st_lockowners.next, 1047ea1da636SNeilBrown struct nfs4_stateowner, so_perstateid); 1048ea1da636SNeilBrown /* list_del(&open_stp->st_lockowners); */ 10491da177e4SLinus Torvalds BUG_ON(lock_sop->so_is_open_owner); 10501da177e4SLinus Torvalds release_stateowner(lock_sop); 10511da177e4SLinus Torvalds } 10521da177e4SLinus Torvalds } 10531da177e4SLinus Torvalds 10541da177e4SLinus Torvalds static void 10551da177e4SLinus Torvalds unhash_stateowner(struct nfs4_stateowner *sop) 10561da177e4SLinus Torvalds { 10571da177e4SLinus Torvalds struct nfs4_stateid *stp; 10581da177e4SLinus Torvalds 10591da177e4SLinus Torvalds list_del(&sop->so_idhash); 10601da177e4SLinus Torvalds list_del(&sop->so_strhash); 10616fa305deSNeilBrown if (sop->so_is_open_owner) 10621da177e4SLinus Torvalds list_del(&sop->so_perclient); 1063ea1da636SNeilBrown list_del(&sop->so_perstateid); 1064ea1da636SNeilBrown while (!list_empty(&sop->so_stateids)) { 1065ea1da636SNeilBrown stp = list_entry(sop->so_stateids.next, 1066ea1da636SNeilBrown struct nfs4_stateid, st_perstateowner); 10671da177e4SLinus Torvalds if (sop->so_is_open_owner) 10681da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 10691da177e4SLinus Torvalds else 10701da177e4SLinus Torvalds release_stateid(stp, LOCK_STATE); 10711da177e4SLinus Torvalds } 10721da177e4SLinus Torvalds } 10731da177e4SLinus Torvalds 10741da177e4SLinus Torvalds static void 10751da177e4SLinus Torvalds release_stateowner(struct nfs4_stateowner *sop) 10761da177e4SLinus Torvalds { 10771da177e4SLinus Torvalds unhash_stateowner(sop); 10781da177e4SLinus Torvalds list_del(&sop->so_close_lru); 10791da177e4SLinus Torvalds nfs4_put_stateowner(sop); 10801da177e4SLinus Torvalds } 10811da177e4SLinus Torvalds 10821da177e4SLinus Torvalds static inline void 10831da177e4SLinus Torvalds init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { 10841da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 10851da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 10861da177e4SLinus Torvalds 10871da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 1088ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 1089ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); 10901da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 10911da177e4SLinus Torvalds list_add(&stp->st_hash, &stateid_hashtbl[hashval]); 1092ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 10938beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 10941da177e4SLinus Torvalds stp->st_stateowner = sop; 109513cd2184SNeilBrown get_nfs4_file(fp); 10961da177e4SLinus Torvalds stp->st_file = fp; 10971da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 10981da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 10991da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 11001da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 11011da177e4SLinus Torvalds stp->st_access_bmap = 0; 11021da177e4SLinus Torvalds stp->st_deny_bmap = 0; 11031da177e4SLinus Torvalds __set_bit(open->op_share_access, &stp->st_access_bmap); 11041da177e4SLinus Torvalds __set_bit(open->op_share_deny, &stp->st_deny_bmap); 11054c4cd222SNeilBrown stp->st_openstp = NULL; 11061da177e4SLinus Torvalds } 11071da177e4SLinus Torvalds 11081da177e4SLinus Torvalds static void 11091da177e4SLinus Torvalds release_stateid(struct nfs4_stateid *stp, int flags) 11101da177e4SLinus Torvalds { 11111da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 11121da177e4SLinus Torvalds 11131da177e4SLinus Torvalds list_del(&stp->st_hash); 11141da177e4SLinus Torvalds list_del(&stp->st_perfile); 1115ea1da636SNeilBrown list_del(&stp->st_perstateowner); 11161da177e4SLinus Torvalds if (flags & OPEN_STATE) { 11171da177e4SLinus Torvalds release_stateid_lockowners(stp); 11181da177e4SLinus Torvalds stp->st_vfs_file = NULL; 11191da177e4SLinus Torvalds nfsd_close(filp); 11201da177e4SLinus Torvalds } else if (flags & LOCK_STATE) 11211da177e4SLinus Torvalds locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); 112213cd2184SNeilBrown put_nfs4_file(stp->st_file); 11235ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 11241da177e4SLinus Torvalds } 11251da177e4SLinus Torvalds 1126fd39ca9aSNeilBrown static void 11271da177e4SLinus Torvalds move_to_close_lru(struct nfs4_stateowner *sop) 11281da177e4SLinus Torvalds { 11291da177e4SLinus Torvalds dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); 11301da177e4SLinus Torvalds 1131358dd55aSNeilBrown list_move_tail(&sop->so_close_lru, &close_lru); 11321da177e4SLinus Torvalds sop->so_time = get_seconds(); 11331da177e4SLinus Torvalds } 11341da177e4SLinus Torvalds 11351da177e4SLinus Torvalds static int 1136599e0a22SJ. Bruce Fields same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, 1137599e0a22SJ. Bruce Fields clientid_t *clid) 1138599e0a22SJ. Bruce Fields { 1139599e0a22SJ. Bruce Fields return (sop->so_owner.len == owner->len) && 1140599e0a22SJ. Bruce Fields 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && 1141599e0a22SJ. Bruce Fields (sop->so_client->cl_clientid.cl_id == clid->cl_id); 11421da177e4SLinus Torvalds } 11431da177e4SLinus Torvalds 11441da177e4SLinus Torvalds static struct nfs4_stateowner * 11451da177e4SLinus Torvalds find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) 11461da177e4SLinus Torvalds { 11471da177e4SLinus Torvalds struct nfs4_stateowner *so = NULL; 11481da177e4SLinus Torvalds 11491da177e4SLinus Torvalds list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { 1150599e0a22SJ. Bruce Fields if (same_owner_str(so, &open->op_owner, &open->op_clientid)) 11511da177e4SLinus Torvalds return so; 11521da177e4SLinus Torvalds } 11531da177e4SLinus Torvalds return NULL; 11541da177e4SLinus Torvalds } 11551da177e4SLinus Torvalds 11561da177e4SLinus Torvalds /* search file_hashtbl[] for file */ 11571da177e4SLinus Torvalds static struct nfs4_file * 11581da177e4SLinus Torvalds find_file(struct inode *ino) 11591da177e4SLinus Torvalds { 11601da177e4SLinus Torvalds unsigned int hashval = file_hashval(ino); 11611da177e4SLinus Torvalds struct nfs4_file *fp; 11621da177e4SLinus Torvalds 11631da177e4SLinus Torvalds list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { 116413cd2184SNeilBrown if (fp->fi_inode == ino) { 116513cd2184SNeilBrown get_nfs4_file(fp); 11661da177e4SLinus Torvalds return fp; 11671da177e4SLinus Torvalds } 116813cd2184SNeilBrown } 11691da177e4SLinus Torvalds return NULL; 11701da177e4SLinus Torvalds } 11711da177e4SLinus Torvalds 11728838dc43SJ. Bruce Fields static inline int access_valid(u32 x) 1173ba5a6a19SJ. Bruce Fields { 11748838dc43SJ. Bruce Fields if (x < NFS4_SHARE_ACCESS_READ) 11758838dc43SJ. Bruce Fields return 0; 11768838dc43SJ. Bruce Fields if (x > NFS4_SHARE_ACCESS_BOTH) 11778838dc43SJ. Bruce Fields return 0; 11788838dc43SJ. Bruce Fields return 1; 1179ba5a6a19SJ. Bruce Fields } 1180ba5a6a19SJ. Bruce Fields 11818838dc43SJ. Bruce Fields static inline int deny_valid(u32 x) 1182ba5a6a19SJ. Bruce Fields { 11838838dc43SJ. Bruce Fields /* Note: unlike access bits, deny bits may be zero. */ 11848838dc43SJ. Bruce Fields return x <= NFS4_SHARE_DENY_BOTH; 1185ba5a6a19SJ. Bruce Fields } 11861da177e4SLinus Torvalds 11874f83aa30SJ. Bruce Fields /* 11884f83aa30SJ. Bruce Fields * We store the NONE, READ, WRITE, and BOTH bits separately in the 11894f83aa30SJ. Bruce Fields * st_{access,deny}_bmap field of the stateid, in order to track not 11904f83aa30SJ. Bruce Fields * only what share bits are currently in force, but also what 11914f83aa30SJ. Bruce Fields * combinations of share bits previous opens have used. This allows us 11924f83aa30SJ. Bruce Fields * to enforce the recommendation of rfc 3530 14.2.19 that the server 11934f83aa30SJ. Bruce Fields * return an error if the client attempt to downgrade to a combination 11944f83aa30SJ. Bruce Fields * of share bits not explicable by closing some of its previous opens. 11954f83aa30SJ. Bruce Fields * 11964f83aa30SJ. Bruce Fields * XXX: This enforcement is actually incomplete, since we don't keep 11974f83aa30SJ. Bruce Fields * track of access/deny bit combinations; so, e.g., we allow: 11984f83aa30SJ. Bruce Fields * 11994f83aa30SJ. Bruce Fields * OPEN allow read, deny write 12004f83aa30SJ. Bruce Fields * OPEN allow both, deny none 12014f83aa30SJ. Bruce Fields * DOWNGRADE allow read, deny none 12024f83aa30SJ. Bruce Fields * 12034f83aa30SJ. Bruce Fields * which we should reject. 12044f83aa30SJ. Bruce Fields */ 1205fd39ca9aSNeilBrown static void 12061da177e4SLinus Torvalds set_access(unsigned int *access, unsigned long bmap) { 12071da177e4SLinus Torvalds int i; 12081da177e4SLinus Torvalds 12091da177e4SLinus Torvalds *access = 0; 12101da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 12111da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12121da177e4SLinus Torvalds *access |= i; 12131da177e4SLinus Torvalds } 12141da177e4SLinus Torvalds } 12151da177e4SLinus Torvalds 1216fd39ca9aSNeilBrown static void 12171da177e4SLinus Torvalds set_deny(unsigned int *deny, unsigned long bmap) { 12181da177e4SLinus Torvalds int i; 12191da177e4SLinus Torvalds 12201da177e4SLinus Torvalds *deny = 0; 12211da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 12221da177e4SLinus Torvalds if (test_bit(i, &bmap)) 12231da177e4SLinus Torvalds *deny |= i ; 12241da177e4SLinus Torvalds } 12251da177e4SLinus Torvalds } 12261da177e4SLinus Torvalds 12271da177e4SLinus Torvalds static int 12281da177e4SLinus Torvalds test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { 12291da177e4SLinus Torvalds unsigned int access, deny; 12301da177e4SLinus Torvalds 12311da177e4SLinus Torvalds set_access(&access, stp->st_access_bmap); 12321da177e4SLinus Torvalds set_deny(&deny, stp->st_deny_bmap); 12331da177e4SLinus Torvalds if ((access & open->op_share_deny) || (deny & open->op_share_access)) 12341da177e4SLinus Torvalds return 0; 12351da177e4SLinus Torvalds return 1; 12361da177e4SLinus Torvalds } 12371da177e4SLinus Torvalds 12381da177e4SLinus Torvalds /* 12391da177e4SLinus Torvalds * Called to check deny when READ with all zero stateid or 12401da177e4SLinus Torvalds * WRITE with all zero or all one stateid 12411da177e4SLinus Torvalds */ 1242b37ad28bSAl Viro static __be32 12431da177e4SLinus Torvalds nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) 12441da177e4SLinus Torvalds { 12451da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 12461da177e4SLinus Torvalds struct nfs4_file *fp; 12471da177e4SLinus Torvalds struct nfs4_stateid *stp; 1248b37ad28bSAl Viro __be32 ret; 12491da177e4SLinus Torvalds 12501da177e4SLinus Torvalds dprintk("NFSD: nfs4_share_conflict\n"); 12511da177e4SLinus Torvalds 12521da177e4SLinus Torvalds fp = find_file(ino); 125313cd2184SNeilBrown if (!fp) 125413cd2184SNeilBrown return nfs_ok; 1255b700949bSNeilBrown ret = nfserr_locked; 12561da177e4SLinus Torvalds /* Search for conflicting share reservations */ 12578beefa24SNeilBrown list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { 12581da177e4SLinus Torvalds if (test_bit(deny_type, &stp->st_deny_bmap) || 12591da177e4SLinus Torvalds test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) 126013cd2184SNeilBrown goto out; 12611da177e4SLinus Torvalds } 126213cd2184SNeilBrown ret = nfs_ok; 126313cd2184SNeilBrown out: 126413cd2184SNeilBrown put_nfs4_file(fp); 126513cd2184SNeilBrown return ret; 12661da177e4SLinus Torvalds } 12671da177e4SLinus Torvalds 12681da177e4SLinus Torvalds static inline void 12691da177e4SLinus Torvalds nfs4_file_downgrade(struct file *filp, unsigned int share_access) 12701da177e4SLinus Torvalds { 12711da177e4SLinus Torvalds if (share_access & NFS4_SHARE_ACCESS_WRITE) { 1272aceaf78dSDave Hansen drop_file_write_access(filp); 12731da177e4SLinus Torvalds filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; 12741da177e4SLinus Torvalds } 12751da177e4SLinus Torvalds } 12761da177e4SLinus Torvalds 12771da177e4SLinus Torvalds /* 12781da177e4SLinus Torvalds * Recall a delegation 12791da177e4SLinus Torvalds */ 12801da177e4SLinus Torvalds static int 12811da177e4SLinus Torvalds do_recall(void *__dp) 12821da177e4SLinus Torvalds { 12831da177e4SLinus Torvalds struct nfs4_delegation *dp = __dp; 12841da177e4SLinus Torvalds 128547f9940cSMeelap Shah dp->dl_file->fi_had_conflict = true; 12861da177e4SLinus Torvalds nfsd4_cb_recall(dp); 12871da177e4SLinus Torvalds return 0; 12881da177e4SLinus Torvalds } 12891da177e4SLinus Torvalds 12901da177e4SLinus Torvalds /* 12911da177e4SLinus Torvalds * Spawn a thread to perform a recall on the delegation represented 12921da177e4SLinus Torvalds * by the lease (file_lock) 12931da177e4SLinus Torvalds * 12941da177e4SLinus Torvalds * Called from break_lease() with lock_kernel() held. 12951da177e4SLinus Torvalds * Note: we assume break_lease will only call this *once* for any given 12961da177e4SLinus Torvalds * lease. 12971da177e4SLinus Torvalds */ 12981da177e4SLinus Torvalds static 12991da177e4SLinus Torvalds void nfsd_break_deleg_cb(struct file_lock *fl) 13001da177e4SLinus Torvalds { 13011da177e4SLinus Torvalds struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; 13021da177e4SLinus Torvalds struct task_struct *t; 13031da177e4SLinus Torvalds 13041da177e4SLinus Torvalds dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); 13051da177e4SLinus Torvalds if (!dp) 13061da177e4SLinus Torvalds return; 13071da177e4SLinus Torvalds 13081da177e4SLinus Torvalds /* We're assuming the state code never drops its reference 13091da177e4SLinus Torvalds * without first removing the lease. Since we're in this lease 13101da177e4SLinus Torvalds * callback (and since the lease code is serialized by the kernel 13111da177e4SLinus Torvalds * lock) we know the server hasn't removed the lease yet, we know 13121da177e4SLinus Torvalds * it's safe to take a reference: */ 13131da177e4SLinus Torvalds atomic_inc(&dp->dl_count); 1314cfdcad4dSJ. Bruce Fields atomic_inc(&dp->dl_client->cl_count); 13151da177e4SLinus Torvalds 13161da177e4SLinus Torvalds spin_lock(&recall_lock); 13171da177e4SLinus Torvalds list_add_tail(&dp->dl_recall_lru, &del_recall_lru); 13181da177e4SLinus Torvalds spin_unlock(&recall_lock); 13191da177e4SLinus Torvalds 13201da177e4SLinus Torvalds /* only place dl_time is set. protected by lock_kernel*/ 13211da177e4SLinus Torvalds dp->dl_time = get_seconds(); 13221da177e4SLinus Torvalds 13230272e1fdSJ. Bruce Fields /* 13240272e1fdSJ. Bruce Fields * We don't want the locks code to timeout the lease for us; 13250272e1fdSJ. Bruce Fields * we'll remove it ourself if the delegation isn't returned 13260272e1fdSJ. Bruce Fields * in time. 13270272e1fdSJ. Bruce Fields */ 13280272e1fdSJ. Bruce Fields fl->fl_break_time = 0; 13291da177e4SLinus Torvalds 13301da177e4SLinus Torvalds t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); 13311da177e4SLinus Torvalds if (IS_ERR(t)) { 13321da177e4SLinus Torvalds struct nfs4_client *clp = dp->dl_client; 13331da177e4SLinus Torvalds 13341da177e4SLinus Torvalds printk(KERN_INFO "NFSD: Callback thread failed for " 13351da177e4SLinus Torvalds "for client (clientid %08x/%08x)\n", 13361da177e4SLinus Torvalds clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); 1337cfdcad4dSJ. Bruce Fields put_nfs4_client(dp->dl_client); 13381da177e4SLinus Torvalds nfs4_put_delegation(dp); 13391da177e4SLinus Torvalds } 13401da177e4SLinus Torvalds } 13411da177e4SLinus Torvalds 13421da177e4SLinus Torvalds /* 13431da177e4SLinus Torvalds * The file_lock is being reapd. 13441da177e4SLinus Torvalds * 13451da177e4SLinus Torvalds * Called by locks_free_lock() with lock_kernel() held. 13461da177e4SLinus Torvalds */ 13471da177e4SLinus Torvalds static 13481da177e4SLinus Torvalds void nfsd_release_deleg_cb(struct file_lock *fl) 13491da177e4SLinus Torvalds { 13501da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; 13511da177e4SLinus Torvalds 13521da177e4SLinus Torvalds dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); 13531da177e4SLinus Torvalds 13541da177e4SLinus Torvalds if (!(fl->fl_flags & FL_LEASE) || !dp) 13551da177e4SLinus Torvalds return; 13561da177e4SLinus Torvalds dp->dl_flock = NULL; 13571da177e4SLinus Torvalds } 13581da177e4SLinus Torvalds 13591da177e4SLinus Torvalds /* 13601da177e4SLinus Torvalds * Set the delegation file_lock back pointer. 13611da177e4SLinus Torvalds * 1362a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held. 13631da177e4SLinus Torvalds */ 13641da177e4SLinus Torvalds static 13651da177e4SLinus Torvalds void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) 13661da177e4SLinus Torvalds { 13671da177e4SLinus Torvalds struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; 13681da177e4SLinus Torvalds 13691da177e4SLinus Torvalds dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); 13701da177e4SLinus Torvalds if (!dp) 13711da177e4SLinus Torvalds return; 13721da177e4SLinus Torvalds dp->dl_flock = new; 13731da177e4SLinus Torvalds } 13741da177e4SLinus Torvalds 13751da177e4SLinus Torvalds /* 1376a9933ceaSJ. Bruce Fields * Called from setlease() with lock_kernel() held 13771da177e4SLinus Torvalds */ 13781da177e4SLinus Torvalds static 13791da177e4SLinus Torvalds int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) 13801da177e4SLinus Torvalds { 13811da177e4SLinus Torvalds struct nfs4_delegation *onlistd = 13821da177e4SLinus Torvalds (struct nfs4_delegation *)onlist->fl_owner; 13831da177e4SLinus Torvalds struct nfs4_delegation *tryd = 13841da177e4SLinus Torvalds (struct nfs4_delegation *)try->fl_owner; 13851da177e4SLinus Torvalds 13861da177e4SLinus Torvalds if (onlist->fl_lmops != try->fl_lmops) 13871da177e4SLinus Torvalds return 0; 13881da177e4SLinus Torvalds 13891da177e4SLinus Torvalds return onlistd->dl_client == tryd->dl_client; 13901da177e4SLinus Torvalds } 13911da177e4SLinus Torvalds 13921da177e4SLinus Torvalds 13931da177e4SLinus Torvalds static 13941da177e4SLinus Torvalds int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) 13951da177e4SLinus Torvalds { 13961da177e4SLinus Torvalds if (arg & F_UNLCK) 13971da177e4SLinus Torvalds return lease_modify(onlist, arg); 13981da177e4SLinus Torvalds else 13991da177e4SLinus Torvalds return -EAGAIN; 14001da177e4SLinus Torvalds } 14011da177e4SLinus Torvalds 1402fd39ca9aSNeilBrown static struct lock_manager_operations nfsd_lease_mng_ops = { 14031da177e4SLinus Torvalds .fl_break = nfsd_break_deleg_cb, 14041da177e4SLinus Torvalds .fl_release_private = nfsd_release_deleg_cb, 14051da177e4SLinus Torvalds .fl_copy_lock = nfsd_copy_lock_deleg_cb, 14061da177e4SLinus Torvalds .fl_mylease = nfsd_same_client_deleg_cb, 14071da177e4SLinus Torvalds .fl_change = nfsd_change_deleg_cb, 14081da177e4SLinus Torvalds }; 14091da177e4SLinus Torvalds 14101da177e4SLinus Torvalds 1411b37ad28bSAl Viro __be32 14121da177e4SLinus Torvalds nfsd4_process_open1(struct nfsd4_open *open) 14131da177e4SLinus Torvalds { 14141da177e4SLinus Torvalds clientid_t *clientid = &open->op_clientid; 14151da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 14161da177e4SLinus Torvalds unsigned int strhashval; 14171da177e4SLinus Torvalds struct nfs4_stateowner *sop = NULL; 14181da177e4SLinus Torvalds 14191da177e4SLinus Torvalds if (!check_name(open->op_owner)) 14200f442aa2SJ. Bruce Fields return nfserr_inval; 14211da177e4SLinus Torvalds 14221da177e4SLinus Torvalds if (STALE_CLIENTID(&open->op_clientid)) 14231da177e4SLinus Torvalds return nfserr_stale_clientid; 14241da177e4SLinus Torvalds 14251da177e4SLinus Torvalds strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); 14261da177e4SLinus Torvalds sop = find_openstateowner_str(strhashval, open); 14271da177e4SLinus Torvalds open->op_stateowner = sop; 14280f442aa2SJ. Bruce Fields if (!sop) { 14290f442aa2SJ. Bruce Fields /* Make sure the client's lease hasn't expired. */ 14300f442aa2SJ. Bruce Fields clp = find_confirmed_client(clientid); 14310f442aa2SJ. Bruce Fields if (clp == NULL) 14320f442aa2SJ. Bruce Fields return nfserr_expired; 14330f442aa2SJ. Bruce Fields goto renew; 14340f442aa2SJ. Bruce Fields } 1435ae8b6253SJ. Bruce Fields if (!sop->so_confirmed) { 14360f442aa2SJ. Bruce Fields /* Replace unconfirmed owners without checking for replay. */ 1437ae8b6253SJ. Bruce Fields clp = sop->so_client; 1438ae8b6253SJ. Bruce Fields release_stateowner(sop); 14390f442aa2SJ. Bruce Fields open->op_stateowner = NULL; 1440ae8b6253SJ. Bruce Fields goto renew; 14410f442aa2SJ. Bruce Fields } 14420f442aa2SJ. Bruce Fields if (open->op_seqid == sop->so_seqid - 1) { 14431da177e4SLinus Torvalds if (sop->so_replay.rp_buflen) 1444a90b061cSAl Viro return nfserr_replay_me; 14451da177e4SLinus Torvalds /* The original OPEN failed so spectacularly 14461da177e4SLinus Torvalds * that we don't even have replay data saved! 14471da177e4SLinus Torvalds * Therefore, we have no choice but to continue 14481da177e4SLinus Torvalds * processing this OPEN; presumably, we'll 14491da177e4SLinus Torvalds * fail again for the same reason. 14501da177e4SLinus Torvalds */ 14510f442aa2SJ. Bruce Fields dprintk("nfsd4_process_open1: replay with no replay cache\n"); 14521da177e4SLinus Torvalds goto renew; 14531da177e4SLinus Torvalds } 14540f442aa2SJ. Bruce Fields if (open->op_seqid != sop->so_seqid) 14550f442aa2SJ. Bruce Fields return nfserr_bad_seqid; 14560f442aa2SJ. Bruce Fields renew: 14570f442aa2SJ. Bruce Fields if (open->op_stateowner == NULL) { 14581da177e4SLinus Torvalds sop = alloc_init_open_stateowner(strhashval, clp, open); 14591da177e4SLinus Torvalds if (sop == NULL) 14600f442aa2SJ. Bruce Fields return nfserr_resource; 14611da177e4SLinus Torvalds open->op_stateowner = sop; 14620f442aa2SJ. Bruce Fields } 14630f442aa2SJ. Bruce Fields list_del_init(&sop->so_close_lru); 14641da177e4SLinus Torvalds renew_client(sop->so_client); 14650f442aa2SJ. Bruce Fields return nfs_ok; 14661da177e4SLinus Torvalds } 14671da177e4SLinus Torvalds 1468b37ad28bSAl Viro static inline __be32 14694a6e43e6SNeilBrown nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) 14704a6e43e6SNeilBrown { 14714a6e43e6SNeilBrown if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) 14724a6e43e6SNeilBrown return nfserr_openmode; 14734a6e43e6SNeilBrown else 14744a6e43e6SNeilBrown return nfs_ok; 14754a6e43e6SNeilBrown } 14764a6e43e6SNeilBrown 147752f4fb43SNeilBrown static struct nfs4_delegation * 147852f4fb43SNeilBrown find_delegation_file(struct nfs4_file *fp, stateid_t *stid) 147952f4fb43SNeilBrown { 148052f4fb43SNeilBrown struct nfs4_delegation *dp; 148152f4fb43SNeilBrown 1482ea1da636SNeilBrown list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { 148352f4fb43SNeilBrown if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) 148452f4fb43SNeilBrown return dp; 148552f4fb43SNeilBrown } 148652f4fb43SNeilBrown return NULL; 148752f4fb43SNeilBrown } 148852f4fb43SNeilBrown 1489b37ad28bSAl Viro static __be32 1490567d9829SNeilBrown nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, 1491567d9829SNeilBrown struct nfs4_delegation **dp) 1492567d9829SNeilBrown { 1493567d9829SNeilBrown int flags; 1494b37ad28bSAl Viro __be32 status = nfserr_bad_stateid; 1495567d9829SNeilBrown 1496567d9829SNeilBrown *dp = find_delegation_file(fp, &open->op_delegate_stateid); 1497567d9829SNeilBrown if (*dp == NULL) 1498c44c5eebSNeilBrown goto out; 1499567d9829SNeilBrown flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? 1500567d9829SNeilBrown RD_STATE : WR_STATE; 1501567d9829SNeilBrown status = nfs4_check_delegmode(*dp, flags); 1502567d9829SNeilBrown if (status) 1503567d9829SNeilBrown *dp = NULL; 1504c44c5eebSNeilBrown out: 1505c44c5eebSNeilBrown if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) 1506c44c5eebSNeilBrown return nfs_ok; 1507c44c5eebSNeilBrown if (status) 1508c44c5eebSNeilBrown return status; 1509c44c5eebSNeilBrown open->op_stateowner->so_confirmed = 1; 1510c44c5eebSNeilBrown return nfs_ok; 1511567d9829SNeilBrown } 1512567d9829SNeilBrown 1513b37ad28bSAl Viro static __be32 15141da177e4SLinus Torvalds nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) 15151da177e4SLinus Torvalds { 15161da177e4SLinus Torvalds struct nfs4_stateid *local; 1517b37ad28bSAl Viro __be32 status = nfserr_share_denied; 15181da177e4SLinus Torvalds struct nfs4_stateowner *sop = open->op_stateowner; 15191da177e4SLinus Torvalds 15208beefa24SNeilBrown list_for_each_entry(local, &fp->fi_stateids, st_perfile) { 15211da177e4SLinus Torvalds /* ignore lock owners */ 15221da177e4SLinus Torvalds if (local->st_stateowner->so_is_open_owner == 0) 15231da177e4SLinus Torvalds continue; 15241da177e4SLinus Torvalds /* remember if we have seen this open owner */ 15251da177e4SLinus Torvalds if (local->st_stateowner == sop) 15261da177e4SLinus Torvalds *stpp = local; 15271da177e4SLinus Torvalds /* check for conflicting share reservations */ 15281da177e4SLinus Torvalds if (!test_share(local, open)) 15291da177e4SLinus Torvalds goto out; 15301da177e4SLinus Torvalds } 15311da177e4SLinus Torvalds status = 0; 15321da177e4SLinus Torvalds out: 15331da177e4SLinus Torvalds return status; 15341da177e4SLinus Torvalds } 15351da177e4SLinus Torvalds 15365ac049acSNeilBrown static inline struct nfs4_stateid * 15375ac049acSNeilBrown nfs4_alloc_stateid(void) 15385ac049acSNeilBrown { 15395ac049acSNeilBrown return kmem_cache_alloc(stateid_slab, GFP_KERNEL); 15405ac049acSNeilBrown } 15415ac049acSNeilBrown 1542b37ad28bSAl Viro static __be32 15431da177e4SLinus Torvalds nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, 1544567d9829SNeilBrown struct nfs4_delegation *dp, 15451da177e4SLinus Torvalds struct svc_fh *cur_fh, int flags) 15461da177e4SLinus Torvalds { 15471da177e4SLinus Torvalds struct nfs4_stateid *stp; 15481da177e4SLinus Torvalds 15495ac049acSNeilBrown stp = nfs4_alloc_stateid(); 15501da177e4SLinus Torvalds if (stp == NULL) 15511da177e4SLinus Torvalds return nfserr_resource; 15521da177e4SLinus Torvalds 1553567d9829SNeilBrown if (dp) { 1554567d9829SNeilBrown get_file(dp->dl_vfs_file); 1555567d9829SNeilBrown stp->st_vfs_file = dp->dl_vfs_file; 1556567d9829SNeilBrown } else { 1557b37ad28bSAl Viro __be32 status; 1558567d9829SNeilBrown status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, 1559567d9829SNeilBrown &stp->st_vfs_file); 15601da177e4SLinus Torvalds if (status) { 15611da177e4SLinus Torvalds if (status == nfserr_dropit) 15621da177e4SLinus Torvalds status = nfserr_jukebox; 15635ac049acSNeilBrown kmem_cache_free(stateid_slab, stp); 15641da177e4SLinus Torvalds return status; 15651da177e4SLinus Torvalds } 1566567d9829SNeilBrown } 15671da177e4SLinus Torvalds *stpp = stp; 15681da177e4SLinus Torvalds return 0; 15691da177e4SLinus Torvalds } 15701da177e4SLinus Torvalds 1571b37ad28bSAl Viro static inline __be32 15721da177e4SLinus Torvalds nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, 15731da177e4SLinus Torvalds struct nfsd4_open *open) 15741da177e4SLinus Torvalds { 15751da177e4SLinus Torvalds struct iattr iattr = { 15761da177e4SLinus Torvalds .ia_valid = ATTR_SIZE, 15771da177e4SLinus Torvalds .ia_size = 0, 15781da177e4SLinus Torvalds }; 15791da177e4SLinus Torvalds if (!open->op_truncate) 15801da177e4SLinus Torvalds return 0; 15811da177e4SLinus Torvalds if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) 15829246585aSAl Viro return nfserr_inval; 15831da177e4SLinus Torvalds return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); 15841da177e4SLinus Torvalds } 15851da177e4SLinus Torvalds 1586b37ad28bSAl Viro static __be32 15871da177e4SLinus Torvalds nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) 15881da177e4SLinus Torvalds { 15891da177e4SLinus Torvalds struct file *filp = stp->st_vfs_file; 15907eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 15916c26d08fSJ. Bruce Fields unsigned int share_access, new_writer; 1592b37ad28bSAl Viro __be32 status; 15931da177e4SLinus Torvalds 15941da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 15956c26d08fSJ. Bruce Fields new_writer = (~share_access) & open->op_share_access 15966c26d08fSJ. Bruce Fields & NFS4_SHARE_ACCESS_WRITE; 15971da177e4SLinus Torvalds 15986c26d08fSJ. Bruce Fields if (new_writer) { 1599b37ad28bSAl Viro int err = get_write_access(inode); 1600b37ad28bSAl Viro if (err) 1601b37ad28bSAl Viro return nfserrno(err); 1602e518f056SBenny Halevy err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); 1603e518f056SBenny Halevy if (err) 1604e518f056SBenny Halevy return nfserrno(err); 1605e518f056SBenny Halevy file_take_write(filp); 16066c26d08fSJ. Bruce Fields } 16071da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, cur_fh, open); 16081da177e4SLinus Torvalds if (status) { 16096c26d08fSJ. Bruce Fields if (new_writer) 16101da177e4SLinus Torvalds put_write_access(inode); 16111da177e4SLinus Torvalds return status; 16121da177e4SLinus Torvalds } 16131da177e4SLinus Torvalds /* remember the open */ 16146c26d08fSJ. Bruce Fields filp->f_mode |= open->op_share_access; 1615b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_access, &stp->st_access_bmap); 1616b55e0ba1SJ. Bruce Fields __set_bit(open->op_share_deny, &stp->st_deny_bmap); 16171da177e4SLinus Torvalds 16181da177e4SLinus Torvalds return nfs_ok; 16191da177e4SLinus Torvalds } 16201da177e4SLinus Torvalds 16211da177e4SLinus Torvalds 16221da177e4SLinus Torvalds static void 162337515177SNeilBrown nfs4_set_claim_prev(struct nfsd4_open *open) 16241da177e4SLinus Torvalds { 16251da177e4SLinus Torvalds open->op_stateowner->so_confirmed = 1; 1626c7b9a459SNeilBrown open->op_stateowner->so_client->cl_firststate = 1; 16271da177e4SLinus Torvalds } 16281da177e4SLinus Torvalds 16291da177e4SLinus Torvalds /* 16301da177e4SLinus Torvalds * Attempt to hand out a delegation. 16311da177e4SLinus Torvalds */ 16321da177e4SLinus Torvalds static void 16331da177e4SLinus Torvalds nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) 16341da177e4SLinus Torvalds { 16351da177e4SLinus Torvalds struct nfs4_delegation *dp; 16361da177e4SLinus Torvalds struct nfs4_stateowner *sop = stp->st_stateowner; 16371da177e4SLinus Torvalds struct nfs4_callback *cb = &sop->so_client->cl_callback; 16381da177e4SLinus Torvalds struct file_lock fl, *flp = &fl; 16391da177e4SLinus Torvalds int status, flag = 0; 16401da177e4SLinus Torvalds 16411da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16427b190fecSNeilBrown open->op_recall = 0; 16437b190fecSNeilBrown switch (open->op_claim_type) { 16447b190fecSNeilBrown case NFS4_OPEN_CLAIM_PREVIOUS: 16457b190fecSNeilBrown if (!atomic_read(&cb->cb_set)) 16467b190fecSNeilBrown open->op_recall = 1; 16477b190fecSNeilBrown flag = open->op_delegate_type; 16487b190fecSNeilBrown if (flag == NFS4_OPEN_DELEGATE_NONE) 16491da177e4SLinus Torvalds goto out; 16507b190fecSNeilBrown break; 16517b190fecSNeilBrown case NFS4_OPEN_CLAIM_NULL: 16527b190fecSNeilBrown /* Let's not give out any delegations till everyone's 16537b190fecSNeilBrown * had the chance to reclaim theirs.... */ 1654af558e33SJ. Bruce Fields if (locks_in_grace()) 16557b190fecSNeilBrown goto out; 16567b190fecSNeilBrown if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) 16577b190fecSNeilBrown goto out; 16581da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 16591da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_WRITE; 16601da177e4SLinus Torvalds else 16611da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_READ; 16627b190fecSNeilBrown break; 16637b190fecSNeilBrown default: 16647b190fecSNeilBrown goto out; 16657b190fecSNeilBrown } 16661da177e4SLinus Torvalds 16671da177e4SLinus Torvalds dp = alloc_init_deleg(sop->so_client, stp, fh, flag); 16681da177e4SLinus Torvalds if (dp == NULL) { 16691da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16701da177e4SLinus Torvalds goto out; 16711da177e4SLinus Torvalds } 16721da177e4SLinus Torvalds locks_init_lock(&fl); 16731da177e4SLinus Torvalds fl.fl_lmops = &nfsd_lease_mng_ops; 16741da177e4SLinus Torvalds fl.fl_flags = FL_LEASE; 16759167f501SFelix Blyakher fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; 16761da177e4SLinus Torvalds fl.fl_end = OFFSET_MAX; 16771da177e4SLinus Torvalds fl.fl_owner = (fl_owner_t)dp; 16781da177e4SLinus Torvalds fl.fl_file = stp->st_vfs_file; 16791da177e4SLinus Torvalds fl.fl_pid = current->tgid; 16801da177e4SLinus Torvalds 1681a9933ceaSJ. Bruce Fields /* vfs_setlease checks to see if delegation should be handed out. 16821da177e4SLinus Torvalds * the lock_manager callbacks fl_mylease and fl_change are used 16831da177e4SLinus Torvalds */ 16849167f501SFelix Blyakher if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { 16851da177e4SLinus Torvalds dprintk("NFSD: setlease failed [%d], no delegation\n", status); 1686c907132dSNeilBrown unhash_delegation(dp); 16871da177e4SLinus Torvalds flag = NFS4_OPEN_DELEGATE_NONE; 16881da177e4SLinus Torvalds goto out; 16891da177e4SLinus Torvalds } 16901da177e4SLinus Torvalds 16911da177e4SLinus Torvalds memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); 16921da177e4SLinus Torvalds 16931da177e4SLinus Torvalds dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", 16941da177e4SLinus Torvalds dp->dl_stateid.si_boot, 16951da177e4SLinus Torvalds dp->dl_stateid.si_stateownerid, 16961da177e4SLinus Torvalds dp->dl_stateid.si_fileid, 16971da177e4SLinus Torvalds dp->dl_stateid.si_generation); 16981da177e4SLinus Torvalds out: 16997b190fecSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS 17007b190fecSNeilBrown && flag == NFS4_OPEN_DELEGATE_NONE 17017b190fecSNeilBrown && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) 17022fdada03SJ. Bruce Fields dprintk("NFSD: WARNING: refusing delegation reclaim\n"); 17031da177e4SLinus Torvalds open->op_delegate_type = flag; 17041da177e4SLinus Torvalds } 17051da177e4SLinus Torvalds 17061da177e4SLinus Torvalds /* 17071da177e4SLinus Torvalds * called with nfs4_lock_state() held. 17081da177e4SLinus Torvalds */ 1709b37ad28bSAl Viro __be32 17101da177e4SLinus Torvalds nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) 17111da177e4SLinus Torvalds { 17121da177e4SLinus Torvalds struct nfs4_file *fp = NULL; 17131da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 17141da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 1715567d9829SNeilBrown struct nfs4_delegation *dp = NULL; 1716b37ad28bSAl Viro __be32 status; 17171da177e4SLinus Torvalds 17181da177e4SLinus Torvalds status = nfserr_inval; 1719ba5a6a19SJ. Bruce Fields if (!access_valid(open->op_share_access) 1720ba5a6a19SJ. Bruce Fields || !deny_valid(open->op_share_deny)) 17211da177e4SLinus Torvalds goto out; 17221da177e4SLinus Torvalds /* 17231da177e4SLinus Torvalds * Lookup file; if found, lookup stateid and check open request, 17241da177e4SLinus Torvalds * and check for delegations in the process of being recalled. 17251da177e4SLinus Torvalds * If not found, create the nfs4_file struct 17261da177e4SLinus Torvalds */ 17271da177e4SLinus Torvalds fp = find_file(ino); 17281da177e4SLinus Torvalds if (fp) { 17291da177e4SLinus Torvalds if ((status = nfs4_check_open(fp, open, &stp))) 17301da177e4SLinus Torvalds goto out; 1731c44c5eebSNeilBrown status = nfs4_check_deleg(fp, open, &dp); 1732c44c5eebSNeilBrown if (status) 1733c44c5eebSNeilBrown goto out; 17341da177e4SLinus Torvalds } else { 1735c44c5eebSNeilBrown status = nfserr_bad_stateid; 1736c44c5eebSNeilBrown if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) 1737c44c5eebSNeilBrown goto out; 17381da177e4SLinus Torvalds status = nfserr_resource; 17391da177e4SLinus Torvalds fp = alloc_init_file(ino); 17401da177e4SLinus Torvalds if (fp == NULL) 17411da177e4SLinus Torvalds goto out; 17421da177e4SLinus Torvalds } 17431da177e4SLinus Torvalds 17441da177e4SLinus Torvalds /* 17451da177e4SLinus Torvalds * OPEN the file, or upgrade an existing OPEN. 17461da177e4SLinus Torvalds * If truncate fails, the OPEN fails. 17471da177e4SLinus Torvalds */ 17481da177e4SLinus Torvalds if (stp) { 17491da177e4SLinus Torvalds /* Stateid was found, this is an OPEN upgrade */ 17501da177e4SLinus Torvalds status = nfs4_upgrade_open(rqstp, current_fh, stp, open); 17511da177e4SLinus Torvalds if (status) 17521da177e4SLinus Torvalds goto out; 1753444c2c07SNeilBrown update_stateid(&stp->st_stateid); 17541da177e4SLinus Torvalds } else { 17551da177e4SLinus Torvalds /* Stateid was not found, this is a new OPEN */ 17561da177e4SLinus Torvalds int flags = 0; 17579ecb6a08SJ. Bruce Fields if (open->op_share_access & NFS4_SHARE_ACCESS_READ) 17588837abcaSMiklos Szeredi flags |= NFSD_MAY_READ; 17591da177e4SLinus Torvalds if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) 17608837abcaSMiklos Szeredi flags |= NFSD_MAY_WRITE; 1761567d9829SNeilBrown status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); 1762567d9829SNeilBrown if (status) 17631da177e4SLinus Torvalds goto out; 17641da177e4SLinus Torvalds init_stateid(stp, fp, open); 17651da177e4SLinus Torvalds status = nfsd4_truncate(rqstp, current_fh, open); 17661da177e4SLinus Torvalds if (status) { 17671da177e4SLinus Torvalds release_stateid(stp, OPEN_STATE); 17681da177e4SLinus Torvalds goto out; 17691da177e4SLinus Torvalds } 17701da177e4SLinus Torvalds } 17711da177e4SLinus Torvalds memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); 17721da177e4SLinus Torvalds 17731da177e4SLinus Torvalds /* 17741da177e4SLinus Torvalds * Attempt to hand out a delegation. No error return, because the 17751da177e4SLinus Torvalds * OPEN succeeds even if we fail. 17761da177e4SLinus Torvalds */ 17771da177e4SLinus Torvalds nfs4_open_delegation(current_fh, open, stp); 17781da177e4SLinus Torvalds 17791da177e4SLinus Torvalds status = nfs_ok; 17801da177e4SLinus Torvalds 17811da177e4SLinus Torvalds dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", 17821da177e4SLinus Torvalds stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, 17831da177e4SLinus Torvalds stp->st_stateid.si_fileid, stp->st_stateid.si_generation); 17841da177e4SLinus Torvalds out: 178513cd2184SNeilBrown if (fp) 178613cd2184SNeilBrown put_nfs4_file(fp); 178737515177SNeilBrown if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) 178837515177SNeilBrown nfs4_set_claim_prev(open); 17891da177e4SLinus Torvalds /* 17901da177e4SLinus Torvalds * To finish the open response, we just need to set the rflags. 17911da177e4SLinus Torvalds */ 17921da177e4SLinus Torvalds open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; 17931da177e4SLinus Torvalds if (!open->op_stateowner->so_confirmed) 17941da177e4SLinus Torvalds open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; 17951da177e4SLinus Torvalds 17961da177e4SLinus Torvalds return status; 17971da177e4SLinus Torvalds } 17981da177e4SLinus Torvalds 1799b37ad28bSAl Viro __be32 1800b591480bSJ.Bruce Fields nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 1801b591480bSJ.Bruce Fields clientid_t *clid) 18021da177e4SLinus Torvalds { 18031da177e4SLinus Torvalds struct nfs4_client *clp; 1804b37ad28bSAl Viro __be32 status; 18051da177e4SLinus Torvalds 18061da177e4SLinus Torvalds nfs4_lock_state(); 18071da177e4SLinus Torvalds dprintk("process_renew(%08x/%08x): starting\n", 18081da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 18091da177e4SLinus Torvalds status = nfserr_stale_clientid; 18101da177e4SLinus Torvalds if (STALE_CLIENTID(clid)) 18111da177e4SLinus Torvalds goto out; 18121da177e4SLinus Torvalds clp = find_confirmed_client(clid); 18131da177e4SLinus Torvalds status = nfserr_expired; 18141da177e4SLinus Torvalds if (clp == NULL) { 18151da177e4SLinus Torvalds /* We assume the client took too long to RENEW. */ 18161da177e4SLinus Torvalds dprintk("nfsd4_renew: clientid not found!\n"); 18171da177e4SLinus Torvalds goto out; 18181da177e4SLinus Torvalds } 18191da177e4SLinus Torvalds renew_client(clp); 18201da177e4SLinus Torvalds status = nfserr_cb_path_down; 1821ea1da636SNeilBrown if (!list_empty(&clp->cl_delegations) 18221da177e4SLinus Torvalds && !atomic_read(&clp->cl_callback.cb_set)) 18231da177e4SLinus Torvalds goto out; 18241da177e4SLinus Torvalds status = nfs_ok; 18251da177e4SLinus Torvalds out: 18261da177e4SLinus Torvalds nfs4_unlock_state(); 18271da177e4SLinus Torvalds return status; 18281da177e4SLinus Torvalds } 18291da177e4SLinus Torvalds 1830af558e33SJ. Bruce Fields struct lock_manager nfsd4_manager = { 1831af558e33SJ. Bruce Fields }; 1832af558e33SJ. Bruce Fields 1833a76b4319SNeilBrown static void 1834af558e33SJ. Bruce Fields nfsd4_end_grace(void) 1835a76b4319SNeilBrown { 1836a76b4319SNeilBrown dprintk("NFSD: end of grace period\n"); 1837c7b9a459SNeilBrown nfsd4_recdir_purge_old(); 1838af558e33SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 1839a76b4319SNeilBrown } 1840a76b4319SNeilBrown 1841fd39ca9aSNeilBrown static time_t 18421da177e4SLinus Torvalds nfs4_laundromat(void) 18431da177e4SLinus Torvalds { 18441da177e4SLinus Torvalds struct nfs4_client *clp; 18451da177e4SLinus Torvalds struct nfs4_stateowner *sop; 18461da177e4SLinus Torvalds struct nfs4_delegation *dp; 18471da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 18481da177e4SLinus Torvalds time_t cutoff = get_seconds() - NFSD_LEASE_TIME; 18491da177e4SLinus Torvalds time_t t, clientid_val = NFSD_LEASE_TIME; 18501da177e4SLinus Torvalds time_t u, test_val = NFSD_LEASE_TIME; 18511da177e4SLinus Torvalds 18521da177e4SLinus Torvalds nfs4_lock_state(); 18531da177e4SLinus Torvalds 18541da177e4SLinus Torvalds dprintk("NFSD: laundromat service - starting\n"); 1855af558e33SJ. Bruce Fields if (locks_in_grace()) 1856af558e33SJ. Bruce Fields nfsd4_end_grace(); 18571da177e4SLinus Torvalds list_for_each_safe(pos, next, &client_lru) { 18581da177e4SLinus Torvalds clp = list_entry(pos, struct nfs4_client, cl_lru); 18591da177e4SLinus Torvalds if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { 18601da177e4SLinus Torvalds t = clp->cl_time - cutoff; 18611da177e4SLinus Torvalds if (clientid_val > t) 18621da177e4SLinus Torvalds clientid_val = t; 18631da177e4SLinus Torvalds break; 18641da177e4SLinus Torvalds } 18651da177e4SLinus Torvalds dprintk("NFSD: purging unused client (clientid %08x)\n", 18661da177e4SLinus Torvalds clp->cl_clientid.cl_id); 1867c7b9a459SNeilBrown nfsd4_remove_clid_dir(clp); 18681da177e4SLinus Torvalds expire_client(clp); 18691da177e4SLinus Torvalds } 18701da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 18711da177e4SLinus Torvalds spin_lock(&recall_lock); 18721da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 18731da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18741da177e4SLinus Torvalds if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { 18751da177e4SLinus Torvalds u = dp->dl_time - cutoff; 18761da177e4SLinus Torvalds if (test_val > u) 18771da177e4SLinus Torvalds test_val = u; 18781da177e4SLinus Torvalds break; 18791da177e4SLinus Torvalds } 18801da177e4SLinus Torvalds dprintk("NFSD: purging unused delegation dp %p, fp %p\n", 18811da177e4SLinus Torvalds dp, dp->dl_flock); 18821da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 18831da177e4SLinus Torvalds } 18841da177e4SLinus Torvalds spin_unlock(&recall_lock); 18851da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 18861da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 18871da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 18881da177e4SLinus Torvalds unhash_delegation(dp); 18891da177e4SLinus Torvalds } 18901da177e4SLinus Torvalds test_val = NFSD_LEASE_TIME; 18911da177e4SLinus Torvalds list_for_each_safe(pos, next, &close_lru) { 18921da177e4SLinus Torvalds sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); 18931da177e4SLinus Torvalds if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { 18941da177e4SLinus Torvalds u = sop->so_time - cutoff; 18951da177e4SLinus Torvalds if (test_val > u) 18961da177e4SLinus Torvalds test_val = u; 18971da177e4SLinus Torvalds break; 18981da177e4SLinus Torvalds } 18991da177e4SLinus Torvalds dprintk("NFSD: purging unused open stateowner (so_id %d)\n", 19001da177e4SLinus Torvalds sop->so_id); 1901358dd55aSNeilBrown release_stateowner(sop); 19021da177e4SLinus Torvalds } 19031da177e4SLinus Torvalds if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) 19041da177e4SLinus Torvalds clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; 19051da177e4SLinus Torvalds nfs4_unlock_state(); 19061da177e4SLinus Torvalds return clientid_val; 19071da177e4SLinus Torvalds } 19081da177e4SLinus Torvalds 1909a254b246SHarvey Harrison static struct workqueue_struct *laundry_wq; 1910a254b246SHarvey Harrison static void laundromat_main(struct work_struct *); 1911a254b246SHarvey Harrison static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); 1912a254b246SHarvey Harrison 1913a254b246SHarvey Harrison static void 1914c4028958SDavid Howells laundromat_main(struct work_struct *not_used) 19151da177e4SLinus Torvalds { 19161da177e4SLinus Torvalds time_t t; 19171da177e4SLinus Torvalds 19181da177e4SLinus Torvalds t = nfs4_laundromat(); 19191da177e4SLinus Torvalds dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); 192058da282bSNeilBrown queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); 19211da177e4SLinus Torvalds } 19221da177e4SLinus Torvalds 1923fd39ca9aSNeilBrown static struct nfs4_stateowner * 1924f8816512SNeilBrown search_close_lru(u32 st_id, int flags) 1925f8816512SNeilBrown { 19261da177e4SLinus Torvalds struct nfs4_stateowner *local = NULL; 19271da177e4SLinus Torvalds 19281da177e4SLinus Torvalds if (flags & CLOSE_STATE) { 19291da177e4SLinus Torvalds list_for_each_entry(local, &close_lru, so_close_lru) { 19301da177e4SLinus Torvalds if (local->so_id == st_id) 19311da177e4SLinus Torvalds return local; 19321da177e4SLinus Torvalds } 19331da177e4SLinus Torvalds } 19341da177e4SLinus Torvalds return NULL; 19351da177e4SLinus Torvalds } 19361da177e4SLinus Torvalds 19371da177e4SLinus Torvalds static inline int 19381da177e4SLinus Torvalds nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) 19391da177e4SLinus Torvalds { 19407eaa36e2SJosef "Jeff" Sipek return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; 19411da177e4SLinus Torvalds } 19421da177e4SLinus Torvalds 19431da177e4SLinus Torvalds static int 19441da177e4SLinus Torvalds STALE_STATEID(stateid_t *stateid) 19451da177e4SLinus Torvalds { 19461da177e4SLinus Torvalds if (stateid->si_boot == boot_time) 19471da177e4SLinus Torvalds return 0; 1948849823c5SNeil Brown dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", 19491da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 19501da177e4SLinus Torvalds stateid->si_generation); 19511da177e4SLinus Torvalds return 1; 19521da177e4SLinus Torvalds } 19531da177e4SLinus Torvalds 19541da177e4SLinus Torvalds static inline int 19551da177e4SLinus Torvalds access_permit_read(unsigned long access_bmap) 19561da177e4SLinus Torvalds { 19571da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || 19581da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || 19591da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); 19601da177e4SLinus Torvalds } 19611da177e4SLinus Torvalds 19621da177e4SLinus Torvalds static inline int 19631da177e4SLinus Torvalds access_permit_write(unsigned long access_bmap) 19641da177e4SLinus Torvalds { 19651da177e4SLinus Torvalds return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || 19661da177e4SLinus Torvalds test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); 19671da177e4SLinus Torvalds } 19681da177e4SLinus Torvalds 19691da177e4SLinus Torvalds static 1970b37ad28bSAl Viro __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) 19711da177e4SLinus Torvalds { 1972b37ad28bSAl Viro __be32 status = nfserr_openmode; 19731da177e4SLinus Torvalds 19741da177e4SLinus Torvalds if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) 19751da177e4SLinus Torvalds goto out; 19761da177e4SLinus Torvalds if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) 19771da177e4SLinus Torvalds goto out; 19781da177e4SLinus Torvalds status = nfs_ok; 19791da177e4SLinus Torvalds out: 19801da177e4SLinus Torvalds return status; 19811da177e4SLinus Torvalds } 19821da177e4SLinus Torvalds 1983b37ad28bSAl Viro static inline __be32 19841da177e4SLinus Torvalds check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) 19851da177e4SLinus Torvalds { 19861da177e4SLinus Torvalds /* Trying to call delegreturn with a special stateid? Yuch: */ 19871da177e4SLinus Torvalds if (!(flags & (RD_STATE | WR_STATE))) 19881da177e4SLinus Torvalds return nfserr_bad_stateid; 19891da177e4SLinus Torvalds else if (ONE_STATEID(stateid) && (flags & RD_STATE)) 19901da177e4SLinus Torvalds return nfs_ok; 1991af558e33SJ. Bruce Fields else if (locks_in_grace()) { 19921da177e4SLinus Torvalds /* Answer in remaining cases depends on existance of 19931da177e4SLinus Torvalds * conflicting state; so we must wait out the grace period. */ 19941da177e4SLinus Torvalds return nfserr_grace; 19951da177e4SLinus Torvalds } else if (flags & WR_STATE) 19961da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 19971da177e4SLinus Torvalds NFS4_SHARE_DENY_WRITE); 19981da177e4SLinus Torvalds else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ 19991da177e4SLinus Torvalds return nfs4_share_conflict(current_fh, 20001da177e4SLinus Torvalds NFS4_SHARE_DENY_READ); 20011da177e4SLinus Torvalds } 20021da177e4SLinus Torvalds 20031da177e4SLinus Torvalds /* 20041da177e4SLinus Torvalds * Allow READ/WRITE during grace period on recovered state only for files 20051da177e4SLinus Torvalds * that are not able to provide mandatory locking. 20061da177e4SLinus Torvalds */ 20071da177e4SLinus Torvalds static inline int 20081da177e4SLinus Torvalds io_during_grace_disallowed(struct inode *inode, int flags) 20091da177e4SLinus Torvalds { 2010af558e33SJ. Bruce Fields return locks_in_grace() && (flags & (RD_STATE | WR_STATE)) 2011a16877caSPavel Emelyanov && mandatory_lock(inode); 20121da177e4SLinus Torvalds } 20131da177e4SLinus Torvalds 20140836f587SJ. Bruce Fields static int check_stateid_generation(stateid_t *in, stateid_t *ref) 20150836f587SJ. Bruce Fields { 20160836f587SJ. Bruce Fields /* If the client sends us a stateid from the future, it's buggy: */ 20170836f587SJ. Bruce Fields if (in->si_generation > ref->si_generation) 20180836f587SJ. Bruce Fields return nfserr_bad_stateid; 20190836f587SJ. Bruce Fields /* 20200836f587SJ. Bruce Fields * The following, however, can happen. For example, if the 20210836f587SJ. Bruce Fields * client sends an open and some IO at the same time, the open 20220836f587SJ. Bruce Fields * may bump si_generation while the IO is still in flight. 20230836f587SJ. Bruce Fields * Thanks to hard links and renames, the client never knows what 20240836f587SJ. Bruce Fields * file an open will affect. So it could avoid that situation 20250836f587SJ. Bruce Fields * only by serializing all opens and IO from the same open 20260836f587SJ. Bruce Fields * owner. To recover from the old_stateid error, the client 20270836f587SJ. Bruce Fields * will just have to retry the IO: 20280836f587SJ. Bruce Fields */ 20290836f587SJ. Bruce Fields if (in->si_generation < ref->si_generation) 20300836f587SJ. Bruce Fields return nfserr_old_stateid; 20310836f587SJ. Bruce Fields return nfs_ok; 20320836f587SJ. Bruce Fields } 20330836f587SJ. Bruce Fields 20341da177e4SLinus Torvalds /* 20351da177e4SLinus Torvalds * Checks for stateid operations 20361da177e4SLinus Torvalds */ 2037b37ad28bSAl Viro __be32 20381da177e4SLinus Torvalds nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) 20391da177e4SLinus Torvalds { 20401da177e4SLinus Torvalds struct nfs4_stateid *stp = NULL; 20411da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 20421da177e4SLinus Torvalds stateid_t *stidp; 20431da177e4SLinus Torvalds struct inode *ino = current_fh->fh_dentry->d_inode; 2044b37ad28bSAl Viro __be32 status; 20451da177e4SLinus Torvalds 20461da177e4SLinus Torvalds dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", 20471da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, 20481da177e4SLinus Torvalds stateid->si_fileid, stateid->si_generation); 20491da177e4SLinus Torvalds if (filpp) 20501da177e4SLinus Torvalds *filpp = NULL; 20511da177e4SLinus Torvalds 20521da177e4SLinus Torvalds if (io_during_grace_disallowed(ino, flags)) 20531da177e4SLinus Torvalds return nfserr_grace; 20541da177e4SLinus Torvalds 20551da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) 20561da177e4SLinus Torvalds return check_special_stateids(current_fh, stateid, flags); 20571da177e4SLinus Torvalds 20581da177e4SLinus Torvalds /* STALE STATEID */ 20591da177e4SLinus Torvalds status = nfserr_stale_stateid; 20601da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 20611da177e4SLinus Torvalds goto out; 20621da177e4SLinus Torvalds 20631da177e4SLinus Torvalds /* BAD STATEID */ 20641da177e4SLinus Torvalds status = nfserr_bad_stateid; 20651da177e4SLinus Torvalds if (!stateid->si_fileid) { /* delegation stateid */ 20661da177e4SLinus Torvalds if(!(dp = find_delegation_stateid(ino, stateid))) { 20671da177e4SLinus Torvalds dprintk("NFSD: delegation stateid not found\n"); 20681da177e4SLinus Torvalds goto out; 20691da177e4SLinus Torvalds } 20701da177e4SLinus Torvalds stidp = &dp->dl_stateid; 20711da177e4SLinus Torvalds } else { /* open or lock stateid */ 20721da177e4SLinus Torvalds if (!(stp = find_stateid(stateid, flags))) { 20731da177e4SLinus Torvalds dprintk("NFSD: open or lock stateid not found\n"); 20741da177e4SLinus Torvalds goto out; 20751da177e4SLinus Torvalds } 20761da177e4SLinus Torvalds if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) 20771da177e4SLinus Torvalds goto out; 20781da177e4SLinus Torvalds if (!stp->st_stateowner->so_confirmed) 20791da177e4SLinus Torvalds goto out; 20801da177e4SLinus Torvalds stidp = &stp->st_stateid; 20811da177e4SLinus Torvalds } 20820836f587SJ. Bruce Fields status = check_stateid_generation(stateid, stidp); 20830836f587SJ. Bruce Fields if (status) 20841da177e4SLinus Torvalds goto out; 20851da177e4SLinus Torvalds if (stp) { 20861da177e4SLinus Torvalds if ((status = nfs4_check_openmode(stp,flags))) 20871da177e4SLinus Torvalds goto out; 20881da177e4SLinus Torvalds renew_client(stp->st_stateowner->so_client); 20891da177e4SLinus Torvalds if (filpp) 20901da177e4SLinus Torvalds *filpp = stp->st_vfs_file; 20916a85fa3aSJ. Bruce Fields } else { 20921da177e4SLinus Torvalds if ((status = nfs4_check_delegmode(dp, flags))) 20931da177e4SLinus Torvalds goto out; 20941da177e4SLinus Torvalds renew_client(dp->dl_client); 20951da177e4SLinus Torvalds if (flags & DELEG_RET) 20961da177e4SLinus Torvalds unhash_delegation(dp); 20971da177e4SLinus Torvalds if (filpp) 20981da177e4SLinus Torvalds *filpp = dp->dl_vfs_file; 20991da177e4SLinus Torvalds } 21001da177e4SLinus Torvalds status = nfs_ok; 21011da177e4SLinus Torvalds out: 21021da177e4SLinus Torvalds return status; 21031da177e4SLinus Torvalds } 21041da177e4SLinus Torvalds 21054c4cd222SNeilBrown static inline int 21064c4cd222SNeilBrown setlkflg (int type) 21074c4cd222SNeilBrown { 21084c4cd222SNeilBrown return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? 21094c4cd222SNeilBrown RD_STATE : WR_STATE; 21104c4cd222SNeilBrown } 21111da177e4SLinus Torvalds 21121da177e4SLinus Torvalds /* 21131da177e4SLinus Torvalds * Checks for sequence id mutating operations. 21141da177e4SLinus Torvalds */ 2115b37ad28bSAl Viro static __be32 21164c4cd222SNeilBrown nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) 21171da177e4SLinus Torvalds { 21181da177e4SLinus Torvalds struct nfs4_stateid *stp; 21191da177e4SLinus Torvalds struct nfs4_stateowner *sop; 21200836f587SJ. Bruce Fields __be32 status; 21211da177e4SLinus Torvalds 21221da177e4SLinus Torvalds dprintk("NFSD: preprocess_seqid_op: seqid=%d " 21231da177e4SLinus Torvalds "stateid = (%08x/%08x/%08x/%08x)\n", seqid, 21241da177e4SLinus Torvalds stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, 21251da177e4SLinus Torvalds stateid->si_generation); 21261da177e4SLinus Torvalds 21271da177e4SLinus Torvalds *stpp = NULL; 21281da177e4SLinus Torvalds *sopp = NULL; 21291da177e4SLinus Torvalds 21301da177e4SLinus Torvalds if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { 21312fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); 21323a4f98bbSNeilBrown return nfserr_bad_stateid; 21331da177e4SLinus Torvalds } 21341da177e4SLinus Torvalds 21351da177e4SLinus Torvalds if (STALE_STATEID(stateid)) 21363a4f98bbSNeilBrown return nfserr_stale_stateid; 21371da177e4SLinus Torvalds /* 21381da177e4SLinus Torvalds * We return BAD_STATEID if filehandle doesn't match stateid, 21391da177e4SLinus Torvalds * the confirmed flag is incorrecly set, or the generation 21401da177e4SLinus Torvalds * number is incorrect. 21411da177e4SLinus Torvalds */ 2142f8816512SNeilBrown stp = find_stateid(stateid, flags); 2143f8816512SNeilBrown if (stp == NULL) { 2144f8816512SNeilBrown /* 2145f8816512SNeilBrown * Also, we should make sure this isn't just the result of 2146f8816512SNeilBrown * a replayed close: 2147f8816512SNeilBrown */ 2148f8816512SNeilBrown sop = search_close_lru(stateid->si_stateownerid, flags); 2149f8816512SNeilBrown if (sop == NULL) 2150f8816512SNeilBrown return nfserr_bad_stateid; 2151f8816512SNeilBrown *sopp = sop; 2152f8816512SNeilBrown goto check_replay; 2153f8816512SNeilBrown } 21541da177e4SLinus Torvalds 215539325bd0SJ. Bruce Fields *stpp = stp; 215639325bd0SJ. Bruce Fields *sopp = sop = stp->st_stateowner; 215739325bd0SJ. Bruce Fields 21584c4cd222SNeilBrown if (lock) { 21594c4cd222SNeilBrown clientid_t *lockclid = &lock->v.new.clientid; 21601da177e4SLinus Torvalds struct nfs4_client *clp = sop->so_client; 21614c4cd222SNeilBrown int lkflg = 0; 2162b37ad28bSAl Viro __be32 status; 21631da177e4SLinus Torvalds 21644c4cd222SNeilBrown lkflg = setlkflg(lock->lk_type); 21654c4cd222SNeilBrown 21664c4cd222SNeilBrown if (lock->lk_is_new) { 21671da177e4SLinus Torvalds if (!sop->so_is_open_owner) 21683a4f98bbSNeilBrown return nfserr_bad_stateid; 2169599e0a22SJ. Bruce Fields if (!same_clid(&clp->cl_clientid, lockclid)) 21703a4f98bbSNeilBrown return nfserr_bad_stateid; 21714c4cd222SNeilBrown /* stp is the open stateid */ 21724c4cd222SNeilBrown status = nfs4_check_openmode(stp, lkflg); 21734c4cd222SNeilBrown if (status) 21744c4cd222SNeilBrown return status; 21754c4cd222SNeilBrown } else { 21764c4cd222SNeilBrown /* stp is the lock stateid */ 21774c4cd222SNeilBrown status = nfs4_check_openmode(stp->st_openstp, lkflg); 21784c4cd222SNeilBrown if (status) 21794c4cd222SNeilBrown return status; 21804c4cd222SNeilBrown } 21811da177e4SLinus Torvalds } 21821da177e4SLinus Torvalds 2183f3362737SJ. Bruce Fields if (nfs4_check_fh(current_fh, stp)) { 21842fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); 21853a4f98bbSNeilBrown return nfserr_bad_stateid; 21861da177e4SLinus Torvalds } 21871da177e4SLinus Torvalds 21881da177e4SLinus Torvalds /* 21891da177e4SLinus Torvalds * We now validate the seqid and stateid generation numbers. 21901da177e4SLinus Torvalds * For the moment, we ignore the possibility of 21911da177e4SLinus Torvalds * generation number wraparound. 21921da177e4SLinus Torvalds */ 2193bd9aac52SNeilBrown if (seqid != sop->so_seqid) 21941da177e4SLinus Torvalds goto check_replay; 21951da177e4SLinus Torvalds 21963a4f98bbSNeilBrown if (sop->so_confirmed && flags & CONFIRM) { 21972fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: expected" 21983a4f98bbSNeilBrown " unconfirmed stateowner!\n"); 21993a4f98bbSNeilBrown return nfserr_bad_stateid; 22001da177e4SLinus Torvalds } 22013a4f98bbSNeilBrown if (!sop->so_confirmed && !(flags & CONFIRM)) { 22022fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: stateowner not" 22033a4f98bbSNeilBrown " confirmed yet!\n"); 22043a4f98bbSNeilBrown return nfserr_bad_stateid; 22051da177e4SLinus Torvalds } 22060836f587SJ. Bruce Fields status = check_stateid_generation(stateid, &stp->st_stateid); 22070836f587SJ. Bruce Fields if (status) 22080836f587SJ. Bruce Fields return status; 220952fd004eSNeilBrown renew_client(sop->so_client); 22103a4f98bbSNeilBrown return nfs_ok; 22111da177e4SLinus Torvalds 22121da177e4SLinus Torvalds check_replay: 2213bd9aac52SNeilBrown if (seqid == sop->so_seqid - 1) { 2214849823c5SNeil Brown dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); 22151da177e4SLinus Torvalds /* indicate replay to calling function */ 2216a90b061cSAl Viro return nfserr_replay_me; 22171da177e4SLinus Torvalds } 22182fdada03SJ. Bruce Fields dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", 22193a4f98bbSNeilBrown sop->so_seqid, seqid); 22203a4f98bbSNeilBrown *sopp = NULL; 22213a4f98bbSNeilBrown return nfserr_bad_seqid; 22221da177e4SLinus Torvalds } 22231da177e4SLinus Torvalds 2224b37ad28bSAl Viro __be32 2225ca364317SJ.Bruce Fields nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2226a4f1706aSJ.Bruce Fields struct nfsd4_open_confirm *oc) 22271da177e4SLinus Torvalds { 2228b37ad28bSAl Viro __be32 status; 22291da177e4SLinus Torvalds struct nfs4_stateowner *sop; 22301da177e4SLinus Torvalds struct nfs4_stateid *stp; 22311da177e4SLinus Torvalds 22321da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", 2233ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2234ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 22351da177e4SLinus Torvalds 2236ca364317SJ.Bruce Fields status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); 2237a8cddc5dSJ. Bruce Fields if (status) 2238a8cddc5dSJ. Bruce Fields return status; 22391da177e4SLinus Torvalds 22401da177e4SLinus Torvalds nfs4_lock_state(); 22411da177e4SLinus Torvalds 2242ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2243ca364317SJ.Bruce Fields oc->oc_seqid, &oc->oc_req_stateid, 2244f3362737SJ. Bruce Fields CONFIRM | OPEN_STATE, 22451da177e4SLinus Torvalds &oc->oc_stateowner, &stp, NULL))) 22461da177e4SLinus Torvalds goto out; 22471da177e4SLinus Torvalds 22481da177e4SLinus Torvalds sop = oc->oc_stateowner; 22491da177e4SLinus Torvalds sop->so_confirmed = 1; 22501da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 22511da177e4SLinus Torvalds memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); 22521da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " 22531da177e4SLinus Torvalds "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, 22541da177e4SLinus Torvalds stp->st_stateid.si_boot, 22551da177e4SLinus Torvalds stp->st_stateid.si_stateownerid, 22561da177e4SLinus Torvalds stp->st_stateid.si_fileid, 22571da177e4SLinus Torvalds stp->st_stateid.si_generation); 2258c7b9a459SNeilBrown 2259c7b9a459SNeilBrown nfsd4_create_clid_dir(sop->so_client); 22601da177e4SLinus Torvalds out: 2261f2327d9aSNeil Brown if (oc->oc_stateowner) { 22621da177e4SLinus Torvalds nfs4_get_stateowner(oc->oc_stateowner); 2263a4f1706aSJ.Bruce Fields cstate->replay_owner = oc->oc_stateowner; 2264f2327d9aSNeil Brown } 22651da177e4SLinus Torvalds nfs4_unlock_state(); 22661da177e4SLinus Torvalds return status; 22671da177e4SLinus Torvalds } 22681da177e4SLinus Torvalds 22691da177e4SLinus Torvalds 22701da177e4SLinus Torvalds /* 22711da177e4SLinus Torvalds * unset all bits in union bitmap (bmap) that 22721da177e4SLinus Torvalds * do not exist in share (from successful OPEN_DOWNGRADE) 22731da177e4SLinus Torvalds */ 22741da177e4SLinus Torvalds static void 22751da177e4SLinus Torvalds reset_union_bmap_access(unsigned long access, unsigned long *bmap) 22761da177e4SLinus Torvalds { 22771da177e4SLinus Torvalds int i; 22781da177e4SLinus Torvalds for (i = 1; i < 4; i++) { 22791da177e4SLinus Torvalds if ((i & access) != i) 22801da177e4SLinus Torvalds __clear_bit(i, bmap); 22811da177e4SLinus Torvalds } 22821da177e4SLinus Torvalds } 22831da177e4SLinus Torvalds 22841da177e4SLinus Torvalds static void 22851da177e4SLinus Torvalds reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) 22861da177e4SLinus Torvalds { 22871da177e4SLinus Torvalds int i; 22881da177e4SLinus Torvalds for (i = 0; i < 4; i++) { 22891da177e4SLinus Torvalds if ((i & deny) != i) 22901da177e4SLinus Torvalds __clear_bit(i, bmap); 22911da177e4SLinus Torvalds } 22921da177e4SLinus Torvalds } 22931da177e4SLinus Torvalds 2294b37ad28bSAl Viro __be32 2295ca364317SJ.Bruce Fields nfsd4_open_downgrade(struct svc_rqst *rqstp, 2296ca364317SJ.Bruce Fields struct nfsd4_compound_state *cstate, 2297a4f1706aSJ.Bruce Fields struct nfsd4_open_downgrade *od) 22981da177e4SLinus Torvalds { 2299b37ad28bSAl Viro __be32 status; 23001da177e4SLinus Torvalds struct nfs4_stateid *stp; 23011da177e4SLinus Torvalds unsigned int share_access; 23021da177e4SLinus Torvalds 23031da177e4SLinus Torvalds dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", 2304ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2305ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23061da177e4SLinus Torvalds 2307ba5a6a19SJ. Bruce Fields if (!access_valid(od->od_share_access) 2308ba5a6a19SJ. Bruce Fields || !deny_valid(od->od_share_deny)) 23091da177e4SLinus Torvalds return nfserr_inval; 23101da177e4SLinus Torvalds 23111da177e4SLinus Torvalds nfs4_lock_state(); 2312ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2313ca364317SJ.Bruce Fields od->od_seqid, 23141da177e4SLinus Torvalds &od->od_stateid, 2315f3362737SJ. Bruce Fields OPEN_STATE, 23161da177e4SLinus Torvalds &od->od_stateowner, &stp, NULL))) 23171da177e4SLinus Torvalds goto out; 23181da177e4SLinus Torvalds 23191da177e4SLinus Torvalds status = nfserr_inval; 23201da177e4SLinus Torvalds if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { 23211da177e4SLinus Torvalds dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", 23221da177e4SLinus Torvalds stp->st_access_bmap, od->od_share_access); 23231da177e4SLinus Torvalds goto out; 23241da177e4SLinus Torvalds } 23251da177e4SLinus Torvalds if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { 23261da177e4SLinus Torvalds dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", 23271da177e4SLinus Torvalds stp->st_deny_bmap, od->od_share_deny); 23281da177e4SLinus Torvalds goto out; 23291da177e4SLinus Torvalds } 23301da177e4SLinus Torvalds set_access(&share_access, stp->st_access_bmap); 23311da177e4SLinus Torvalds nfs4_file_downgrade(stp->st_vfs_file, 23321da177e4SLinus Torvalds share_access & ~od->od_share_access); 23331da177e4SLinus Torvalds 23341da177e4SLinus Torvalds reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); 23351da177e4SLinus Torvalds reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); 23361da177e4SLinus Torvalds 23371da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23381da177e4SLinus Torvalds memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); 23391da177e4SLinus Torvalds status = nfs_ok; 23401da177e4SLinus Torvalds out: 2341f2327d9aSNeil Brown if (od->od_stateowner) { 23421da177e4SLinus Torvalds nfs4_get_stateowner(od->od_stateowner); 2343a4f1706aSJ.Bruce Fields cstate->replay_owner = od->od_stateowner; 2344f2327d9aSNeil Brown } 23451da177e4SLinus Torvalds nfs4_unlock_state(); 23461da177e4SLinus Torvalds return status; 23471da177e4SLinus Torvalds } 23481da177e4SLinus Torvalds 23491da177e4SLinus Torvalds /* 23501da177e4SLinus Torvalds * nfs4_unlock_state() called after encode 23511da177e4SLinus Torvalds */ 2352b37ad28bSAl Viro __be32 2353ca364317SJ.Bruce Fields nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2354a4f1706aSJ.Bruce Fields struct nfsd4_close *close) 23551da177e4SLinus Torvalds { 2356b37ad28bSAl Viro __be32 status; 23571da177e4SLinus Torvalds struct nfs4_stateid *stp; 23581da177e4SLinus Torvalds 23591da177e4SLinus Torvalds dprintk("NFSD: nfsd4_close on file %.*s\n", 2360ca364317SJ.Bruce Fields (int)cstate->current_fh.fh_dentry->d_name.len, 2361ca364317SJ.Bruce Fields cstate->current_fh.fh_dentry->d_name.name); 23621da177e4SLinus Torvalds 23631da177e4SLinus Torvalds nfs4_lock_state(); 23641da177e4SLinus Torvalds /* check close_lru for replay */ 2365ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 2366ca364317SJ.Bruce Fields close->cl_seqid, 23671da177e4SLinus Torvalds &close->cl_stateid, 2368f3362737SJ. Bruce Fields OPEN_STATE | CLOSE_STATE, 23691da177e4SLinus Torvalds &close->cl_stateowner, &stp, NULL))) 23701da177e4SLinus Torvalds goto out; 23711da177e4SLinus Torvalds status = nfs_ok; 23721da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 23731da177e4SLinus Torvalds memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); 23741da177e4SLinus Torvalds 237504ef5954SJ. Bruce Fields /* release_stateid() calls nfsd_close() if needed */ 237604ef5954SJ. Bruce Fields release_stateid(stp, OPEN_STATE); 237704ef5954SJ. Bruce Fields 237804ef5954SJ. Bruce Fields /* place unused nfs4_stateowners on so_close_lru list to be 237904ef5954SJ. Bruce Fields * released by the laundromat service after the lease period 238004ef5954SJ. Bruce Fields * to enable us to handle CLOSE replay 238104ef5954SJ. Bruce Fields */ 238204ef5954SJ. Bruce Fields if (list_empty(&close->cl_stateowner->so_stateids)) 238304ef5954SJ. Bruce Fields move_to_close_lru(close->cl_stateowner); 23841da177e4SLinus Torvalds out: 2385f2327d9aSNeil Brown if (close->cl_stateowner) { 23861da177e4SLinus Torvalds nfs4_get_stateowner(close->cl_stateowner); 2387a4f1706aSJ.Bruce Fields cstate->replay_owner = close->cl_stateowner; 2388f2327d9aSNeil Brown } 23891da177e4SLinus Torvalds nfs4_unlock_state(); 23901da177e4SLinus Torvalds return status; 23911da177e4SLinus Torvalds } 23921da177e4SLinus Torvalds 2393b37ad28bSAl Viro __be32 2394ca364317SJ.Bruce Fields nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2395ca364317SJ.Bruce Fields struct nfsd4_delegreturn *dr) 23961da177e4SLinus Torvalds { 2397b37ad28bSAl Viro __be32 status; 23981da177e4SLinus Torvalds 2399ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) 24001da177e4SLinus Torvalds goto out; 24011da177e4SLinus Torvalds 24021da177e4SLinus Torvalds nfs4_lock_state(); 2403ca364317SJ.Bruce Fields status = nfs4_preprocess_stateid_op(&cstate->current_fh, 2404ca364317SJ.Bruce Fields &dr->dr_stateid, DELEG_RET, NULL); 24051da177e4SLinus Torvalds nfs4_unlock_state(); 24061da177e4SLinus Torvalds out: 24071da177e4SLinus Torvalds return status; 24081da177e4SLinus Torvalds } 24091da177e4SLinus Torvalds 24101da177e4SLinus Torvalds 24111da177e4SLinus Torvalds /* 24121da177e4SLinus Torvalds * Lock owner state (byte-range locks) 24131da177e4SLinus Torvalds */ 24141da177e4SLinus Torvalds #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) 24151da177e4SLinus Torvalds #define LOCK_HASH_BITS 8 24161da177e4SLinus Torvalds #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) 24171da177e4SLinus Torvalds #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) 24181da177e4SLinus Torvalds 24191da177e4SLinus Torvalds #define lockownerid_hashval(id) \ 24201da177e4SLinus Torvalds ((id) & LOCK_HASH_MASK) 24211da177e4SLinus Torvalds 24221da177e4SLinus Torvalds static inline unsigned int 24231da177e4SLinus Torvalds lock_ownerstr_hashval(struct inode *inode, u32 cl_id, 24241da177e4SLinus Torvalds struct xdr_netobj *ownername) 24251da177e4SLinus Torvalds { 24261da177e4SLinus Torvalds return (file_hashval(inode) + cl_id 24271da177e4SLinus Torvalds + opaque_hashval(ownername->data, ownername->len)) 24281da177e4SLinus Torvalds & LOCK_HASH_MASK; 24291da177e4SLinus Torvalds } 24301da177e4SLinus Torvalds 24311da177e4SLinus Torvalds static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; 24321da177e4SLinus Torvalds static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; 24331da177e4SLinus Torvalds static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; 24341da177e4SLinus Torvalds 2435fd39ca9aSNeilBrown static struct nfs4_stateid * 24361da177e4SLinus Torvalds find_stateid(stateid_t *stid, int flags) 24371da177e4SLinus Torvalds { 24381da177e4SLinus Torvalds struct nfs4_stateid *local = NULL; 24391da177e4SLinus Torvalds u32 st_id = stid->si_stateownerid; 24401da177e4SLinus Torvalds u32 f_id = stid->si_fileid; 24411da177e4SLinus Torvalds unsigned int hashval; 24421da177e4SLinus Torvalds 24431da177e4SLinus Torvalds dprintk("NFSD: find_stateid flags 0x%x\n",flags); 24441da177e4SLinus Torvalds if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24451da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24461da177e4SLinus Torvalds list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { 24471da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24481da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24491da177e4SLinus Torvalds return local; 24501da177e4SLinus Torvalds } 24511da177e4SLinus Torvalds } 24521da177e4SLinus Torvalds if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { 24531da177e4SLinus Torvalds hashval = stateid_hashval(st_id, f_id); 24541da177e4SLinus Torvalds list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { 24551da177e4SLinus Torvalds if ((local->st_stateid.si_stateownerid == st_id) && 24561da177e4SLinus Torvalds (local->st_stateid.si_fileid == f_id)) 24571da177e4SLinus Torvalds return local; 24581da177e4SLinus Torvalds } 2459849823c5SNeil Brown } 24601da177e4SLinus Torvalds return NULL; 24611da177e4SLinus Torvalds } 24621da177e4SLinus Torvalds 24631da177e4SLinus Torvalds static struct nfs4_delegation * 24641da177e4SLinus Torvalds find_delegation_stateid(struct inode *ino, stateid_t *stid) 24651da177e4SLinus Torvalds { 246613cd2184SNeilBrown struct nfs4_file *fp; 246713cd2184SNeilBrown struct nfs4_delegation *dl; 24681da177e4SLinus Torvalds 24691da177e4SLinus Torvalds dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", 24701da177e4SLinus Torvalds stid->si_boot, stid->si_stateownerid, 24711da177e4SLinus Torvalds stid->si_fileid, stid->si_generation); 24721da177e4SLinus Torvalds 24731da177e4SLinus Torvalds fp = find_file(ino); 247413cd2184SNeilBrown if (!fp) 24751da177e4SLinus Torvalds return NULL; 247613cd2184SNeilBrown dl = find_delegation_file(fp, stid); 247713cd2184SNeilBrown put_nfs4_file(fp); 247813cd2184SNeilBrown return dl; 24791da177e4SLinus Torvalds } 24801da177e4SLinus Torvalds 24811da177e4SLinus Torvalds /* 24821da177e4SLinus Torvalds * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that 24831da177e4SLinus Torvalds * we can't properly handle lock requests that go beyond the (2^63 - 1)-th 24841da177e4SLinus Torvalds * byte, because of sign extension problems. Since NFSv4 calls for 64-bit 24851da177e4SLinus Torvalds * locking, this prevents us from being completely protocol-compliant. The 24861da177e4SLinus Torvalds * real solution to this problem is to start using unsigned file offsets in 24871da177e4SLinus Torvalds * the VFS, but this is a very deep change! 24881da177e4SLinus Torvalds */ 24891da177e4SLinus Torvalds static inline void 24901da177e4SLinus Torvalds nfs4_transform_lock_offset(struct file_lock *lock) 24911da177e4SLinus Torvalds { 24921da177e4SLinus Torvalds if (lock->fl_start < 0) 24931da177e4SLinus Torvalds lock->fl_start = OFFSET_MAX; 24941da177e4SLinus Torvalds if (lock->fl_end < 0) 24951da177e4SLinus Torvalds lock->fl_end = OFFSET_MAX; 24961da177e4SLinus Torvalds } 24971da177e4SLinus Torvalds 2498d5b9026aSNeilBrown /* Hack!: For now, we're defining this just so we can use a pointer to it 2499d5b9026aSNeilBrown * as a unique cookie to identify our (NFSv4's) posix locks. */ 2500e465a77fSAdrian Bunk static struct lock_manager_operations nfsd_posix_mng_ops = { 2501d5b9026aSNeilBrown }; 25021da177e4SLinus Torvalds 25031da177e4SLinus Torvalds static inline void 25041da177e4SLinus Torvalds nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) 25051da177e4SLinus Torvalds { 2506d5b9026aSNeilBrown struct nfs4_stateowner *sop; 2507d5b9026aSNeilBrown unsigned int hval; 25081da177e4SLinus Torvalds 2509d5b9026aSNeilBrown if (fl->fl_lmops == &nfsd_posix_mng_ops) { 2510d5b9026aSNeilBrown sop = (struct nfs4_stateowner *) fl->fl_owner; 2511d5b9026aSNeilBrown hval = lockownerid_hashval(sop->so_id); 25121da177e4SLinus Torvalds kref_get(&sop->so_ref); 25131da177e4SLinus Torvalds deny->ld_sop = sop; 25141da177e4SLinus Torvalds deny->ld_clientid = sop->so_client->cl_clientid; 2515d5b9026aSNeilBrown } else { 2516d5b9026aSNeilBrown deny->ld_sop = NULL; 2517d5b9026aSNeilBrown deny->ld_clientid.cl_boot = 0; 2518d5b9026aSNeilBrown deny->ld_clientid.cl_id = 0; 25191da177e4SLinus Torvalds } 25201da177e4SLinus Torvalds deny->ld_start = fl->fl_start; 25211da177e4SLinus Torvalds deny->ld_length = ~(u64)0; 25221da177e4SLinus Torvalds if (fl->fl_end != ~(u64)0) 25231da177e4SLinus Torvalds deny->ld_length = fl->fl_end - fl->fl_start + 1; 25241da177e4SLinus Torvalds deny->ld_type = NFS4_READ_LT; 25251da177e4SLinus Torvalds if (fl->fl_type != F_RDLCK) 25261da177e4SLinus Torvalds deny->ld_type = NFS4_WRITE_LT; 25271da177e4SLinus Torvalds } 25281da177e4SLinus Torvalds 25291da177e4SLinus Torvalds static struct nfs4_stateowner * 25301da177e4SLinus Torvalds find_lockstateowner_str(struct inode *inode, clientid_t *clid, 25311da177e4SLinus Torvalds struct xdr_netobj *owner) 25321da177e4SLinus Torvalds { 25331da177e4SLinus Torvalds unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); 25341da177e4SLinus Torvalds struct nfs4_stateowner *op; 25351da177e4SLinus Torvalds 25361da177e4SLinus Torvalds list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { 2537599e0a22SJ. Bruce Fields if (same_owner_str(op, owner, clid)) 25381da177e4SLinus Torvalds return op; 25391da177e4SLinus Torvalds } 25401da177e4SLinus Torvalds return NULL; 25411da177e4SLinus Torvalds } 25421da177e4SLinus Torvalds 25431da177e4SLinus Torvalds /* 25441da177e4SLinus Torvalds * Alloc a lock owner structure. 25451da177e4SLinus Torvalds * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has 25461da177e4SLinus Torvalds * occured. 25471da177e4SLinus Torvalds * 25481da177e4SLinus Torvalds * strhashval = lock_ownerstr_hashval 25491da177e4SLinus Torvalds */ 25501da177e4SLinus Torvalds 25511da177e4SLinus Torvalds static struct nfs4_stateowner * 25521da177e4SLinus Torvalds alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { 25531da177e4SLinus Torvalds struct nfs4_stateowner *sop; 25541da177e4SLinus Torvalds struct nfs4_replay *rp; 25551da177e4SLinus Torvalds unsigned int idhashval; 25561da177e4SLinus Torvalds 25571da177e4SLinus Torvalds if (!(sop = alloc_stateowner(&lock->lk_new_owner))) 25581da177e4SLinus Torvalds return NULL; 25591da177e4SLinus Torvalds idhashval = lockownerid_hashval(current_ownerid); 25601da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_idhash); 25611da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_strhash); 25621da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_perclient); 2563ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_stateids); 2564ea1da636SNeilBrown INIT_LIST_HEAD(&sop->so_perstateid); 25651da177e4SLinus Torvalds INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ 25661da177e4SLinus Torvalds sop->so_time = 0; 25671da177e4SLinus Torvalds list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); 25681da177e4SLinus Torvalds list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); 2569ea1da636SNeilBrown list_add(&sop->so_perstateid, &open_stp->st_lockowners); 25701da177e4SLinus Torvalds sop->so_is_open_owner = 0; 25711da177e4SLinus Torvalds sop->so_id = current_ownerid++; 25721da177e4SLinus Torvalds sop->so_client = clp; 2573b59e3c0eSNeil Brown /* It is the openowner seqid that will be incremented in encode in the 2574b59e3c0eSNeil Brown * case of new lockowners; so increment the lock seqid manually: */ 2575b59e3c0eSNeil Brown sop->so_seqid = lock->lk_new_lock_seqid + 1; 25761da177e4SLinus Torvalds sop->so_confirmed = 1; 25771da177e4SLinus Torvalds rp = &sop->so_replay; 2578de1ae286SAl Viro rp->rp_status = nfserr_serverfault; 25791da177e4SLinus Torvalds rp->rp_buflen = 0; 25801da177e4SLinus Torvalds rp->rp_buf = rp->rp_ibuf; 25811da177e4SLinus Torvalds return sop; 25821da177e4SLinus Torvalds } 25831da177e4SLinus Torvalds 2584fd39ca9aSNeilBrown static struct nfs4_stateid * 25851da177e4SLinus Torvalds alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) 25861da177e4SLinus Torvalds { 25871da177e4SLinus Torvalds struct nfs4_stateid *stp; 25881da177e4SLinus Torvalds unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); 25891da177e4SLinus Torvalds 25905ac049acSNeilBrown stp = nfs4_alloc_stateid(); 25915ac049acSNeilBrown if (stp == NULL) 25921da177e4SLinus Torvalds goto out; 25931da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_hash); 25941da177e4SLinus Torvalds INIT_LIST_HEAD(&stp->st_perfile); 2595ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_perstateowner); 2596ea1da636SNeilBrown INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ 25971da177e4SLinus Torvalds list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); 25988beefa24SNeilBrown list_add(&stp->st_perfile, &fp->fi_stateids); 2599ea1da636SNeilBrown list_add(&stp->st_perstateowner, &sop->so_stateids); 26001da177e4SLinus Torvalds stp->st_stateowner = sop; 260113cd2184SNeilBrown get_nfs4_file(fp); 26021da177e4SLinus Torvalds stp->st_file = fp; 26031da177e4SLinus Torvalds stp->st_stateid.si_boot = boot_time; 26041da177e4SLinus Torvalds stp->st_stateid.si_stateownerid = sop->so_id; 26051da177e4SLinus Torvalds stp->st_stateid.si_fileid = fp->fi_id; 26061da177e4SLinus Torvalds stp->st_stateid.si_generation = 0; 26071da177e4SLinus Torvalds stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ 26081da177e4SLinus Torvalds stp->st_access_bmap = open_stp->st_access_bmap; 26091da177e4SLinus Torvalds stp->st_deny_bmap = open_stp->st_deny_bmap; 26104c4cd222SNeilBrown stp->st_openstp = open_stp; 26111da177e4SLinus Torvalds 26121da177e4SLinus Torvalds out: 26131da177e4SLinus Torvalds return stp; 26141da177e4SLinus Torvalds } 26151da177e4SLinus Torvalds 2616fd39ca9aSNeilBrown static int 26171da177e4SLinus Torvalds check_lock_length(u64 offset, u64 length) 26181da177e4SLinus Torvalds { 26191da177e4SLinus Torvalds return ((length == 0) || ((length != ~(u64)0) && 26201da177e4SLinus Torvalds LOFF_OVERFLOW(offset, length))); 26211da177e4SLinus Torvalds } 26221da177e4SLinus Torvalds 26231da177e4SLinus Torvalds /* 26241da177e4SLinus Torvalds * LOCK operation 26251da177e4SLinus Torvalds */ 2626b37ad28bSAl Viro __be32 2627ca364317SJ.Bruce Fields nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2628a4f1706aSJ.Bruce Fields struct nfsd4_lock *lock) 26291da177e4SLinus Torvalds { 26303e9e3dbeSNeilBrown struct nfs4_stateowner *open_sop = NULL; 2631b59e3c0eSNeil Brown struct nfs4_stateowner *lock_sop = NULL; 26321da177e4SLinus Torvalds struct nfs4_stateid *lock_stp; 26331da177e4SLinus Torvalds struct file *filp; 26341da177e4SLinus Torvalds struct file_lock file_lock; 26358dc7c311SAndy Adamson struct file_lock conflock; 2636b37ad28bSAl Viro __be32 status = 0; 26371da177e4SLinus Torvalds unsigned int strhashval; 2638150b3934SMarc Eshel unsigned int cmd; 2639b8dd7b9aSAl Viro int err; 26401da177e4SLinus Torvalds 26411da177e4SLinus Torvalds dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", 26421da177e4SLinus Torvalds (long long) lock->lk_offset, 26431da177e4SLinus Torvalds (long long) lock->lk_length); 26441da177e4SLinus Torvalds 26451da177e4SLinus Torvalds if (check_lock_length(lock->lk_offset, lock->lk_length)) 26461da177e4SLinus Torvalds return nfserr_inval; 26471da177e4SLinus Torvalds 2648ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, 26498837abcaSMiklos Szeredi S_IFREG, NFSD_MAY_LOCK))) { 2650a6f6ef2fSAndy Adamson dprintk("NFSD: nfsd4_lock: permission denied!\n"); 2651a6f6ef2fSAndy Adamson return status; 2652a6f6ef2fSAndy Adamson } 2653a6f6ef2fSAndy Adamson 26541da177e4SLinus Torvalds nfs4_lock_state(); 26551da177e4SLinus Torvalds 26561da177e4SLinus Torvalds if (lock->lk_is_new) { 26571da177e4SLinus Torvalds /* 26581da177e4SLinus Torvalds * Client indicates that this is a new lockowner. 2659893f8770SNeilBrown * Use open owner and open stateid to create lock owner and 2660893f8770SNeilBrown * lock stateid. 26611da177e4SLinus Torvalds */ 26621da177e4SLinus Torvalds struct nfs4_stateid *open_stp = NULL; 26631da177e4SLinus Torvalds struct nfs4_file *fp; 26641da177e4SLinus Torvalds 26651da177e4SLinus Torvalds status = nfserr_stale_clientid; 2666849823c5SNeil Brown if (STALE_CLIENTID(&lock->lk_new_clientid)) 26671da177e4SLinus Torvalds goto out; 26681da177e4SLinus Torvalds 26691da177e4SLinus Torvalds /* validate and update open stateid and open seqid */ 2670ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26711da177e4SLinus Torvalds lock->lk_new_open_seqid, 26721da177e4SLinus Torvalds &lock->lk_new_open_stateid, 2673f3362737SJ. Bruce Fields OPEN_STATE, 26743a65588aSJ. Bruce Fields &lock->lk_replay_owner, &open_stp, 2675b59e3c0eSNeil Brown lock); 267637515177SNeilBrown if (status) 26771da177e4SLinus Torvalds goto out; 26783a65588aSJ. Bruce Fields open_sop = lock->lk_replay_owner; 26791da177e4SLinus Torvalds /* create lockowner and lock stateid */ 26801da177e4SLinus Torvalds fp = open_stp->st_file; 26811da177e4SLinus Torvalds strhashval = lock_ownerstr_hashval(fp->fi_inode, 26821da177e4SLinus Torvalds open_sop->so_client->cl_clientid.cl_id, 26831da177e4SLinus Torvalds &lock->v.new.owner); 26843e9e3dbeSNeilBrown /* XXX: Do we need to check for duplicate stateowners on 26853e9e3dbeSNeilBrown * the same file, or should they just be allowed (and 26863e9e3dbeSNeilBrown * create new stateids)? */ 26871da177e4SLinus Torvalds status = nfserr_resource; 2688b59e3c0eSNeil Brown lock_sop = alloc_init_lock_stateowner(strhashval, 2689b59e3c0eSNeil Brown open_sop->so_client, open_stp, lock); 2690b59e3c0eSNeil Brown if (lock_sop == NULL) 26911da177e4SLinus Torvalds goto out; 2692b59e3c0eSNeil Brown lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); 26938a280510SJ. Bruce Fields if (lock_stp == NULL) 26941da177e4SLinus Torvalds goto out; 26951da177e4SLinus Torvalds } else { 26961da177e4SLinus Torvalds /* lock (lock owner + lock stateid) already exists */ 2697ca364317SJ.Bruce Fields status = nfs4_preprocess_seqid_op(&cstate->current_fh, 26981da177e4SLinus Torvalds lock->lk_old_lock_seqid, 26991da177e4SLinus Torvalds &lock->lk_old_lock_stateid, 2700f3362737SJ. Bruce Fields LOCK_STATE, 27013a65588aSJ. Bruce Fields &lock->lk_replay_owner, &lock_stp, lock); 27021da177e4SLinus Torvalds if (status) 27031da177e4SLinus Torvalds goto out; 27043a65588aSJ. Bruce Fields lock_sop = lock->lk_replay_owner; 27051da177e4SLinus Torvalds } 27063a65588aSJ. Bruce Fields /* lock->lk_replay_owner and lock_stp have been created or found */ 27071da177e4SLinus Torvalds filp = lock_stp->st_vfs_file; 27081da177e4SLinus Torvalds 27090dd395dcSNeilBrown status = nfserr_grace; 2710af558e33SJ. Bruce Fields if (locks_in_grace() && !lock->lk_reclaim) 27110dd395dcSNeilBrown goto out; 27120dd395dcSNeilBrown status = nfserr_no_grace; 2713af558e33SJ. Bruce Fields if (!locks_in_grace() && lock->lk_reclaim) 27140dd395dcSNeilBrown goto out; 27150dd395dcSNeilBrown 27161da177e4SLinus Torvalds locks_init_lock(&file_lock); 27171da177e4SLinus Torvalds switch (lock->lk_type) { 27181da177e4SLinus Torvalds case NFS4_READ_LT: 27191da177e4SLinus Torvalds case NFS4_READW_LT: 27201da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 2721150b3934SMarc Eshel cmd = F_SETLK; 27221da177e4SLinus Torvalds break; 27231da177e4SLinus Torvalds case NFS4_WRITE_LT: 27241da177e4SLinus Torvalds case NFS4_WRITEW_LT: 27251da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 2726150b3934SMarc Eshel cmd = F_SETLK; 27271da177e4SLinus Torvalds break; 27281da177e4SLinus Torvalds default: 27291da177e4SLinus Torvalds status = nfserr_inval; 27301da177e4SLinus Torvalds goto out; 27311da177e4SLinus Torvalds } 2732b59e3c0eSNeil Brown file_lock.fl_owner = (fl_owner_t)lock_sop; 27331da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 27341da177e4SLinus Torvalds file_lock.fl_file = filp; 27351da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2736d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 27371da177e4SLinus Torvalds 27381da177e4SLinus Torvalds file_lock.fl_start = lock->lk_offset; 27391da177e4SLinus Torvalds if ((lock->lk_length == ~(u64)0) || 27401da177e4SLinus Torvalds LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) 27411da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 27421da177e4SLinus Torvalds else 27431da177e4SLinus Torvalds file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; 27441da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 27451da177e4SLinus Torvalds 27461da177e4SLinus Torvalds /* 27471da177e4SLinus Torvalds * Try to lock the file in the VFS. 27481da177e4SLinus Torvalds * Note: locks.c uses the BKL to protect the inode's lock list. 27491da177e4SLinus Torvalds */ 27501da177e4SLinus Torvalds 2751fd85b817SMarc Eshel err = vfs_lock_file(filp, cmd, &file_lock, &conflock); 2752b8dd7b9aSAl Viro switch (-err) { 27531da177e4SLinus Torvalds case 0: /* success! */ 27541da177e4SLinus Torvalds update_stateid(&lock_stp->st_stateid); 27551da177e4SLinus Torvalds memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, 27561da177e4SLinus Torvalds sizeof(stateid_t)); 2757b8dd7b9aSAl Viro status = 0; 2758eb76b3fdSAndy Adamson break; 2759eb76b3fdSAndy Adamson case (EAGAIN): /* conflock holds conflicting lock */ 2760eb76b3fdSAndy Adamson status = nfserr_denied; 2761eb76b3fdSAndy Adamson dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); 2762eb76b3fdSAndy Adamson nfs4_set_lock_denied(&conflock, &lock->lk_denied); 2763eb76b3fdSAndy Adamson break; 27641da177e4SLinus Torvalds case (EDEADLK): 27651da177e4SLinus Torvalds status = nfserr_deadlock; 2766eb76b3fdSAndy Adamson break; 27671da177e4SLinus Torvalds default: 2768fd85b817SMarc Eshel dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); 2769eb76b3fdSAndy Adamson status = nfserr_resource; 2770eb76b3fdSAndy Adamson break; 27711da177e4SLinus Torvalds } 27721da177e4SLinus Torvalds out: 27738a280510SJ. Bruce Fields if (status && lock->lk_is_new && lock_sop) 27748a280510SJ. Bruce Fields release_stateowner(lock_sop); 27753a65588aSJ. Bruce Fields if (lock->lk_replay_owner) { 27763a65588aSJ. Bruce Fields nfs4_get_stateowner(lock->lk_replay_owner); 2777a4f1706aSJ.Bruce Fields cstate->replay_owner = lock->lk_replay_owner; 2778f2327d9aSNeil Brown } 27791da177e4SLinus Torvalds nfs4_unlock_state(); 27801da177e4SLinus Torvalds return status; 27811da177e4SLinus Torvalds } 27821da177e4SLinus Torvalds 27831da177e4SLinus Torvalds /* 27841da177e4SLinus Torvalds * LOCKT operation 27851da177e4SLinus Torvalds */ 2786b37ad28bSAl Viro __be32 2787ca364317SJ.Bruce Fields nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2788ca364317SJ.Bruce Fields struct nfsd4_lockt *lockt) 27891da177e4SLinus Torvalds { 27901da177e4SLinus Torvalds struct inode *inode; 27911da177e4SLinus Torvalds struct file file; 27921da177e4SLinus Torvalds struct file_lock file_lock; 2793fd85b817SMarc Eshel int error; 2794b37ad28bSAl Viro __be32 status; 27951da177e4SLinus Torvalds 2796af558e33SJ. Bruce Fields if (locks_in_grace()) 27971da177e4SLinus Torvalds return nfserr_grace; 27981da177e4SLinus Torvalds 27991da177e4SLinus Torvalds if (check_lock_length(lockt->lt_offset, lockt->lt_length)) 28001da177e4SLinus Torvalds return nfserr_inval; 28011da177e4SLinus Torvalds 28021da177e4SLinus Torvalds lockt->lt_stateowner = NULL; 28031da177e4SLinus Torvalds nfs4_lock_state(); 28041da177e4SLinus Torvalds 28051da177e4SLinus Torvalds status = nfserr_stale_clientid; 2806849823c5SNeil Brown if (STALE_CLIENTID(&lockt->lt_clientid)) 28071da177e4SLinus Torvalds goto out; 28081da177e4SLinus Torvalds 2809ca364317SJ.Bruce Fields if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { 2810849823c5SNeil Brown dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); 28111da177e4SLinus Torvalds if (status == nfserr_symlink) 28121da177e4SLinus Torvalds status = nfserr_inval; 28131da177e4SLinus Torvalds goto out; 28141da177e4SLinus Torvalds } 28151da177e4SLinus Torvalds 2816ca364317SJ.Bruce Fields inode = cstate->current_fh.fh_dentry->d_inode; 28171da177e4SLinus Torvalds locks_init_lock(&file_lock); 28181da177e4SLinus Torvalds switch (lockt->lt_type) { 28191da177e4SLinus Torvalds case NFS4_READ_LT: 28201da177e4SLinus Torvalds case NFS4_READW_LT: 28211da177e4SLinus Torvalds file_lock.fl_type = F_RDLCK; 28221da177e4SLinus Torvalds break; 28231da177e4SLinus Torvalds case NFS4_WRITE_LT: 28241da177e4SLinus Torvalds case NFS4_WRITEW_LT: 28251da177e4SLinus Torvalds file_lock.fl_type = F_WRLCK; 28261da177e4SLinus Torvalds break; 28271da177e4SLinus Torvalds default: 28282fdada03SJ. Bruce Fields dprintk("NFSD: nfs4_lockt: bad lock type!\n"); 28291da177e4SLinus Torvalds status = nfserr_inval; 28301da177e4SLinus Torvalds goto out; 28311da177e4SLinus Torvalds } 28321da177e4SLinus Torvalds 28331da177e4SLinus Torvalds lockt->lt_stateowner = find_lockstateowner_str(inode, 28341da177e4SLinus Torvalds &lockt->lt_clientid, &lockt->lt_owner); 28351da177e4SLinus Torvalds if (lockt->lt_stateowner) 28361da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; 28371da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 28381da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2839d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 28401da177e4SLinus Torvalds 28411da177e4SLinus Torvalds file_lock.fl_start = lockt->lt_offset; 28421da177e4SLinus Torvalds if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) 28431da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 28441da177e4SLinus Torvalds else 28451da177e4SLinus Torvalds file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; 28461da177e4SLinus Torvalds 28471da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 28481da177e4SLinus Torvalds 2849fd85b817SMarc Eshel /* vfs_test_lock uses the struct file _only_ to resolve the inode. 28501da177e4SLinus Torvalds * since LOCKT doesn't require an OPEN, and therefore a struct 2851fd85b817SMarc Eshel * file may not exist, pass vfs_test_lock a struct file with 28521da177e4SLinus Torvalds * only the dentry:inode set. 28531da177e4SLinus Torvalds */ 28541da177e4SLinus Torvalds memset(&file, 0, sizeof (struct file)); 2855ca364317SJ.Bruce Fields file.f_path.dentry = cstate->current_fh.fh_dentry; 28561da177e4SLinus Torvalds 28571da177e4SLinus Torvalds status = nfs_ok; 2858fd85b817SMarc Eshel error = vfs_test_lock(&file, &file_lock); 2859fd85b817SMarc Eshel if (error) { 2860fd85b817SMarc Eshel status = nfserrno(error); 2861fd85b817SMarc Eshel goto out; 2862fd85b817SMarc Eshel } 28639d6a8c5cSMarc Eshel if (file_lock.fl_type != F_UNLCK) { 28641da177e4SLinus Torvalds status = nfserr_denied; 28659d6a8c5cSMarc Eshel nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); 28661da177e4SLinus Torvalds } 28671da177e4SLinus Torvalds out: 28681da177e4SLinus Torvalds nfs4_unlock_state(); 28691da177e4SLinus Torvalds return status; 28701da177e4SLinus Torvalds } 28711da177e4SLinus Torvalds 2872b37ad28bSAl Viro __be32 2873ca364317SJ.Bruce Fields nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, 2874a4f1706aSJ.Bruce Fields struct nfsd4_locku *locku) 28751da177e4SLinus Torvalds { 28761da177e4SLinus Torvalds struct nfs4_stateid *stp; 28771da177e4SLinus Torvalds struct file *filp = NULL; 28781da177e4SLinus Torvalds struct file_lock file_lock; 2879b37ad28bSAl Viro __be32 status; 2880b8dd7b9aSAl Viro int err; 28811da177e4SLinus Torvalds 28821da177e4SLinus Torvalds dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", 28831da177e4SLinus Torvalds (long long) locku->lu_offset, 28841da177e4SLinus Torvalds (long long) locku->lu_length); 28851da177e4SLinus Torvalds 28861da177e4SLinus Torvalds if (check_lock_length(locku->lu_offset, locku->lu_length)) 28871da177e4SLinus Torvalds return nfserr_inval; 28881da177e4SLinus Torvalds 28891da177e4SLinus Torvalds nfs4_lock_state(); 28901da177e4SLinus Torvalds 2891ca364317SJ.Bruce Fields if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, 28921da177e4SLinus Torvalds locku->lu_seqid, 28931da177e4SLinus Torvalds &locku->lu_stateid, 2894f3362737SJ. Bruce Fields LOCK_STATE, 28951da177e4SLinus Torvalds &locku->lu_stateowner, &stp, NULL))) 28961da177e4SLinus Torvalds goto out; 28971da177e4SLinus Torvalds 28981da177e4SLinus Torvalds filp = stp->st_vfs_file; 28991da177e4SLinus Torvalds BUG_ON(!filp); 29001da177e4SLinus Torvalds locks_init_lock(&file_lock); 29011da177e4SLinus Torvalds file_lock.fl_type = F_UNLCK; 29021da177e4SLinus Torvalds file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; 29031da177e4SLinus Torvalds file_lock.fl_pid = current->tgid; 29041da177e4SLinus Torvalds file_lock.fl_file = filp; 29051da177e4SLinus Torvalds file_lock.fl_flags = FL_POSIX; 2906d5b9026aSNeilBrown file_lock.fl_lmops = &nfsd_posix_mng_ops; 29071da177e4SLinus Torvalds file_lock.fl_start = locku->lu_offset; 29081da177e4SLinus Torvalds 29091da177e4SLinus Torvalds if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) 29101da177e4SLinus Torvalds file_lock.fl_end = ~(u64)0; 29111da177e4SLinus Torvalds else 29121da177e4SLinus Torvalds file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; 29131da177e4SLinus Torvalds nfs4_transform_lock_offset(&file_lock); 29141da177e4SLinus Torvalds 29151da177e4SLinus Torvalds /* 29161da177e4SLinus Torvalds * Try to unlock the file in the VFS. 29171da177e4SLinus Torvalds */ 2918fd85b817SMarc Eshel err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); 2919b8dd7b9aSAl Viro if (err) { 2920fd85b817SMarc Eshel dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); 29211da177e4SLinus Torvalds goto out_nfserr; 29221da177e4SLinus Torvalds } 29231da177e4SLinus Torvalds /* 29241da177e4SLinus Torvalds * OK, unlock succeeded; the only thing left to do is update the stateid. 29251da177e4SLinus Torvalds */ 29261da177e4SLinus Torvalds update_stateid(&stp->st_stateid); 29271da177e4SLinus Torvalds memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); 29281da177e4SLinus Torvalds 29291da177e4SLinus Torvalds out: 2930f2327d9aSNeil Brown if (locku->lu_stateowner) { 29311da177e4SLinus Torvalds nfs4_get_stateowner(locku->lu_stateowner); 2932a4f1706aSJ.Bruce Fields cstate->replay_owner = locku->lu_stateowner; 2933f2327d9aSNeil Brown } 29341da177e4SLinus Torvalds nfs4_unlock_state(); 29351da177e4SLinus Torvalds return status; 29361da177e4SLinus Torvalds 29371da177e4SLinus Torvalds out_nfserr: 2938b8dd7b9aSAl Viro status = nfserrno(err); 29391da177e4SLinus Torvalds goto out; 29401da177e4SLinus Torvalds } 29411da177e4SLinus Torvalds 29421da177e4SLinus Torvalds /* 29431da177e4SLinus Torvalds * returns 29441da177e4SLinus Torvalds * 1: locks held by lockowner 29451da177e4SLinus Torvalds * 0: no locks held by lockowner 29461da177e4SLinus Torvalds */ 29471da177e4SLinus Torvalds static int 29481da177e4SLinus Torvalds check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) 29491da177e4SLinus Torvalds { 29501da177e4SLinus Torvalds struct file_lock **flpp; 29517eaa36e2SJosef "Jeff" Sipek struct inode *inode = filp->f_path.dentry->d_inode; 29521da177e4SLinus Torvalds int status = 0; 29531da177e4SLinus Torvalds 29541da177e4SLinus Torvalds lock_kernel(); 29551da177e4SLinus Torvalds for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { 2956796dadfdSJ. Bruce Fields if ((*flpp)->fl_owner == (fl_owner_t)lowner) { 29571da177e4SLinus Torvalds status = 1; 29581da177e4SLinus Torvalds goto out; 29591da177e4SLinus Torvalds } 2960796dadfdSJ. Bruce Fields } 29611da177e4SLinus Torvalds out: 29621da177e4SLinus Torvalds unlock_kernel(); 29631da177e4SLinus Torvalds return status; 29641da177e4SLinus Torvalds } 29651da177e4SLinus Torvalds 2966b37ad28bSAl Viro __be32 2967b591480bSJ.Bruce Fields nfsd4_release_lockowner(struct svc_rqst *rqstp, 2968b591480bSJ.Bruce Fields struct nfsd4_compound_state *cstate, 2969b591480bSJ.Bruce Fields struct nfsd4_release_lockowner *rlockowner) 29701da177e4SLinus Torvalds { 29711da177e4SLinus Torvalds clientid_t *clid = &rlockowner->rl_clientid; 29723e9e3dbeSNeilBrown struct nfs4_stateowner *sop; 29733e9e3dbeSNeilBrown struct nfs4_stateid *stp; 29741da177e4SLinus Torvalds struct xdr_netobj *owner = &rlockowner->rl_owner; 29753e9e3dbeSNeilBrown struct list_head matches; 29763e9e3dbeSNeilBrown int i; 2977b37ad28bSAl Viro __be32 status; 29781da177e4SLinus Torvalds 29791da177e4SLinus Torvalds dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", 29801da177e4SLinus Torvalds clid->cl_boot, clid->cl_id); 29811da177e4SLinus Torvalds 29821da177e4SLinus Torvalds /* XXX check for lease expiration */ 29831da177e4SLinus Torvalds 29841da177e4SLinus Torvalds status = nfserr_stale_clientid; 2985849823c5SNeil Brown if (STALE_CLIENTID(clid)) 29861da177e4SLinus Torvalds return status; 29871da177e4SLinus Torvalds 29881da177e4SLinus Torvalds nfs4_lock_state(); 29891da177e4SLinus Torvalds 29901da177e4SLinus Torvalds status = nfserr_locks_held; 29913e9e3dbeSNeilBrown /* XXX: we're doing a linear search through all the lockowners. 29923e9e3dbeSNeilBrown * Yipes! For now we'll just hope clients aren't really using 29933e9e3dbeSNeilBrown * release_lockowner much, but eventually we have to fix these 29943e9e3dbeSNeilBrown * data structures. */ 29953e9e3dbeSNeilBrown INIT_LIST_HEAD(&matches); 29963e9e3dbeSNeilBrown for (i = 0; i < LOCK_HASH_SIZE; i++) { 29973e9e3dbeSNeilBrown list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { 2998599e0a22SJ. Bruce Fields if (!same_owner_str(sop, owner, clid)) 29993e9e3dbeSNeilBrown continue; 30003e9e3dbeSNeilBrown list_for_each_entry(stp, &sop->so_stateids, 3001ea1da636SNeilBrown st_perstateowner) { 30023e9e3dbeSNeilBrown if (check_for_locks(stp->st_vfs_file, sop)) 30031da177e4SLinus Torvalds goto out; 30043e9e3dbeSNeilBrown /* Note: so_perclient unused for lockowners, 30053e9e3dbeSNeilBrown * so it's OK to fool with here. */ 30063e9e3dbeSNeilBrown list_add(&sop->so_perclient, &matches); 30071da177e4SLinus Torvalds } 30083e9e3dbeSNeilBrown } 30093e9e3dbeSNeilBrown } 30103e9e3dbeSNeilBrown /* Clients probably won't expect us to return with some (but not all) 30113e9e3dbeSNeilBrown * of the lockowner state released; so don't release any until all 30123e9e3dbeSNeilBrown * have been checked. */ 30131da177e4SLinus Torvalds status = nfs_ok; 30140fa822e4SNeilBrown while (!list_empty(&matches)) { 30150fa822e4SNeilBrown sop = list_entry(matches.next, struct nfs4_stateowner, 30160fa822e4SNeilBrown so_perclient); 30170fa822e4SNeilBrown /* unhash_stateowner deletes so_perclient only 30180fa822e4SNeilBrown * for openowners. */ 30190fa822e4SNeilBrown list_del(&sop->so_perclient); 30203e9e3dbeSNeilBrown release_stateowner(sop); 30211da177e4SLinus Torvalds } 30221da177e4SLinus Torvalds out: 30231da177e4SLinus Torvalds nfs4_unlock_state(); 30241da177e4SLinus Torvalds return status; 30251da177e4SLinus Torvalds } 30261da177e4SLinus Torvalds 30271da177e4SLinus Torvalds static inline struct nfs4_client_reclaim * 3028a55370a3SNeilBrown alloc_reclaim(void) 30291da177e4SLinus Torvalds { 3030a55370a3SNeilBrown return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); 30311da177e4SLinus Torvalds } 30321da177e4SLinus Torvalds 3033c7b9a459SNeilBrown int 3034c7b9a459SNeilBrown nfs4_has_reclaimed_state(const char *name) 3035c7b9a459SNeilBrown { 3036c7b9a459SNeilBrown unsigned int strhashval = clientstr_hashval(name); 3037c7b9a459SNeilBrown struct nfs4_client *clp; 3038c7b9a459SNeilBrown 3039c7b9a459SNeilBrown clp = find_confirmed_client_by_str(name, strhashval); 3040c7b9a459SNeilBrown return clp ? 1 : 0; 3041c7b9a459SNeilBrown } 3042c7b9a459SNeilBrown 30431da177e4SLinus Torvalds /* 30441da177e4SLinus Torvalds * failure => all reset bets are off, nfserr_no_grace... 30451da177e4SLinus Torvalds */ 3046190e4fbfSNeilBrown int 3047190e4fbfSNeilBrown nfs4_client_to_reclaim(const char *name) 30481da177e4SLinus Torvalds { 30491da177e4SLinus Torvalds unsigned int strhashval; 30501da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30511da177e4SLinus Torvalds 3052a55370a3SNeilBrown dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); 3053a55370a3SNeilBrown crp = alloc_reclaim(); 30541da177e4SLinus Torvalds if (!crp) 30551da177e4SLinus Torvalds return 0; 3056a55370a3SNeilBrown strhashval = clientstr_hashval(name); 30571da177e4SLinus Torvalds INIT_LIST_HEAD(&crp->cr_strhash); 30581da177e4SLinus Torvalds list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); 3059a55370a3SNeilBrown memcpy(crp->cr_recdir, name, HEXDIR_LEN); 30601da177e4SLinus Torvalds reclaim_str_hashtbl_size++; 30611da177e4SLinus Torvalds return 1; 30621da177e4SLinus Torvalds } 30631da177e4SLinus Torvalds 30641da177e4SLinus Torvalds static void 30651da177e4SLinus Torvalds nfs4_release_reclaim(void) 30661da177e4SLinus Torvalds { 30671da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30681da177e4SLinus Torvalds int i; 30691da177e4SLinus Torvalds 30701da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 30711da177e4SLinus Torvalds while (!list_empty(&reclaim_str_hashtbl[i])) { 30721da177e4SLinus Torvalds crp = list_entry(reclaim_str_hashtbl[i].next, 30731da177e4SLinus Torvalds struct nfs4_client_reclaim, cr_strhash); 30741da177e4SLinus Torvalds list_del(&crp->cr_strhash); 30751da177e4SLinus Torvalds kfree(crp); 30761da177e4SLinus Torvalds reclaim_str_hashtbl_size--; 30771da177e4SLinus Torvalds } 30781da177e4SLinus Torvalds } 30791da177e4SLinus Torvalds BUG_ON(reclaim_str_hashtbl_size); 30801da177e4SLinus Torvalds } 30811da177e4SLinus Torvalds 30821da177e4SLinus Torvalds /* 30831da177e4SLinus Torvalds * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ 3084fd39ca9aSNeilBrown static struct nfs4_client_reclaim * 30851da177e4SLinus Torvalds nfs4_find_reclaim_client(clientid_t *clid) 30861da177e4SLinus Torvalds { 30871da177e4SLinus Torvalds unsigned int strhashval; 30881da177e4SLinus Torvalds struct nfs4_client *clp; 30891da177e4SLinus Torvalds struct nfs4_client_reclaim *crp = NULL; 30901da177e4SLinus Torvalds 30911da177e4SLinus Torvalds 30921da177e4SLinus Torvalds /* find clientid in conf_id_hashtbl */ 30931da177e4SLinus Torvalds clp = find_confirmed_client(clid); 30941da177e4SLinus Torvalds if (clp == NULL) 30951da177e4SLinus Torvalds return NULL; 30961da177e4SLinus Torvalds 3097a55370a3SNeilBrown dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", 3098a55370a3SNeilBrown clp->cl_name.len, clp->cl_name.data, 3099a55370a3SNeilBrown clp->cl_recdir); 31001da177e4SLinus Torvalds 31011da177e4SLinus Torvalds /* find clp->cl_name in reclaim_str_hashtbl */ 3102a55370a3SNeilBrown strhashval = clientstr_hashval(clp->cl_recdir); 31031da177e4SLinus Torvalds list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { 3104a55370a3SNeilBrown if (same_name(crp->cr_recdir, clp->cl_recdir)) { 31051da177e4SLinus Torvalds return crp; 31061da177e4SLinus Torvalds } 31071da177e4SLinus Torvalds } 31081da177e4SLinus Torvalds return NULL; 31091da177e4SLinus Torvalds } 31101da177e4SLinus Torvalds 31111da177e4SLinus Torvalds /* 31121da177e4SLinus Torvalds * Called from OPEN. Look for clientid in reclaim list. 31131da177e4SLinus Torvalds */ 3114b37ad28bSAl Viro __be32 31151da177e4SLinus Torvalds nfs4_check_open_reclaim(clientid_t *clid) 31161da177e4SLinus Torvalds { 3117dfc83565SNeilBrown return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; 31181da177e4SLinus Torvalds } 31191da177e4SLinus Torvalds 3120ac4d8ff2SNeilBrown /* initialization to perform at module load time: */ 31211da177e4SLinus Torvalds 3122e8ff2a84SJ. Bruce Fields int 3123ac4d8ff2SNeilBrown nfs4_state_init(void) 31241da177e4SLinus Torvalds { 3125e8ff2a84SJ. Bruce Fields int i, status; 31261da177e4SLinus Torvalds 3127e8ff2a84SJ. Bruce Fields status = nfsd4_init_slabs(); 3128e8ff2a84SJ. Bruce Fields if (status) 3129e8ff2a84SJ. Bruce Fields return status; 31301da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 31311da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_id_hashtbl[i]); 31321da177e4SLinus Torvalds INIT_LIST_HEAD(&conf_str_hashtbl[i]); 31331da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_str_hashtbl[i]); 31341da177e4SLinus Torvalds INIT_LIST_HEAD(&unconf_id_hashtbl[i]); 31351da177e4SLinus Torvalds } 31361da177e4SLinus Torvalds for (i = 0; i < FILE_HASH_SIZE; i++) { 31371da177e4SLinus Torvalds INIT_LIST_HEAD(&file_hashtbl[i]); 31381da177e4SLinus Torvalds } 31391da177e4SLinus Torvalds for (i = 0; i < OWNER_HASH_SIZE; i++) { 31401da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerstr_hashtbl[i]); 31411da177e4SLinus Torvalds INIT_LIST_HEAD(&ownerid_hashtbl[i]); 31421da177e4SLinus Torvalds } 31431da177e4SLinus Torvalds for (i = 0; i < STATEID_HASH_SIZE; i++) { 31441da177e4SLinus Torvalds INIT_LIST_HEAD(&stateid_hashtbl[i]); 31451da177e4SLinus Torvalds INIT_LIST_HEAD(&lockstateid_hashtbl[i]); 31461da177e4SLinus Torvalds } 31471da177e4SLinus Torvalds for (i = 0; i < LOCK_HASH_SIZE; i++) { 31481da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); 31491da177e4SLinus Torvalds INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); 31501da177e4SLinus Torvalds } 31511da177e4SLinus Torvalds memset(&onestateid, ~0, sizeof(stateid_t)); 31521da177e4SLinus Torvalds INIT_LIST_HEAD(&close_lru); 31531da177e4SLinus Torvalds INIT_LIST_HEAD(&client_lru); 31541da177e4SLinus Torvalds INIT_LIST_HEAD(&del_recall_lru); 3155ac4d8ff2SNeilBrown for (i = 0; i < CLIENT_HASH_SIZE; i++) 3156ac4d8ff2SNeilBrown INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); 3157ac4d8ff2SNeilBrown reclaim_str_hashtbl_size = 0; 3158e8ff2a84SJ. Bruce Fields return 0; 3159ac4d8ff2SNeilBrown } 3160ac4d8ff2SNeilBrown 3161190e4fbfSNeilBrown static void 3162190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(void) 3163190e4fbfSNeilBrown { 3164190e4fbfSNeilBrown int status; 3165190e4fbfSNeilBrown 31660964a3d3SNeilBrown nfs4_lock_state(); 31670964a3d3SNeilBrown nfsd4_init_recdir(user_recovery_dirname); 3168190e4fbfSNeilBrown status = nfsd4_recdir_load(); 31690964a3d3SNeilBrown nfs4_unlock_state(); 3170190e4fbfSNeilBrown if (status) 3171190e4fbfSNeilBrown printk("NFSD: Failure reading reboot recovery data\n"); 3172190e4fbfSNeilBrown } 3173190e4fbfSNeilBrown 31749a8db97eSMarc Eshel unsigned long 31759a8db97eSMarc Eshel get_nfs4_grace_period(void) 31769a8db97eSMarc Eshel { 31779a8db97eSMarc Eshel return max(user_lease_time, lease_time) * HZ; 31789a8db97eSMarc Eshel } 31799a8db97eSMarc Eshel 3180c2f1a551SMeelap Shah /* 3181c2f1a551SMeelap Shah * Since the lifetime of a delegation isn't limited to that of an open, a 3182c2f1a551SMeelap Shah * client may quite reasonably hang on to a delegation as long as it has 3183c2f1a551SMeelap Shah * the inode cached. This becomes an obvious problem the first time a 3184c2f1a551SMeelap Shah * client's inode cache approaches the size of the server's total memory. 3185c2f1a551SMeelap Shah * 3186c2f1a551SMeelap Shah * For now we avoid this problem by imposing a hard limit on the number 3187c2f1a551SMeelap Shah * of delegations, which varies according to the server's memory size. 3188c2f1a551SMeelap Shah */ 3189c2f1a551SMeelap Shah static void 3190c2f1a551SMeelap Shah set_max_delegations(void) 3191c2f1a551SMeelap Shah { 3192c2f1a551SMeelap Shah /* 3193c2f1a551SMeelap Shah * Allow at most 4 delegations per megabyte of RAM. Quick 3194c2f1a551SMeelap Shah * estimates suggest that in the worst case (where every delegation 3195c2f1a551SMeelap Shah * is for a different inode), a delegation could take about 1.5K, 3196c2f1a551SMeelap Shah * giving a worst case usage of about 6% of memory. 3197c2f1a551SMeelap Shah */ 3198c2f1a551SMeelap Shah max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); 3199c2f1a551SMeelap Shah } 3200c2f1a551SMeelap Shah 3201ac4d8ff2SNeilBrown /* initialization to perform when the nfsd service is started: */ 3202ac4d8ff2SNeilBrown 3203ac4d8ff2SNeilBrown static void 3204ac4d8ff2SNeilBrown __nfs4_state_start(void) 3205ac4d8ff2SNeilBrown { 32069a8db97eSMarc Eshel unsigned long grace_time; 3207ac4d8ff2SNeilBrown 32081da177e4SLinus Torvalds boot_time = get_seconds(); 3209af558e33SJ. Bruce Fields grace_time = get_nfs4_grace_period(); 3210d99a05adSNeilBrown lease_time = user_lease_time; 3211af558e33SJ. Bruce Fields locks_start_grace(&nfsd4_manager); 32129a8db97eSMarc Eshel printk(KERN_INFO "NFSD: starting %ld-second grace period\n", 32139a8db97eSMarc Eshel grace_time/HZ); 321458da282bSNeilBrown laundry_wq = create_singlethread_workqueue("nfsd4"); 32159a8db97eSMarc Eshel queue_delayed_work(laundry_wq, &laundromat_work, grace_time); 3216c2f1a551SMeelap Shah set_max_delegations(); 32171da177e4SLinus Torvalds } 32181da177e4SLinus Torvalds 3219e8ff2a84SJ. Bruce Fields void 322076a3550eSNeilBrown nfs4_state_start(void) 32211da177e4SLinus Torvalds { 32221da177e4SLinus Torvalds if (nfs4_init) 3223e8ff2a84SJ. Bruce Fields return; 3224190e4fbfSNeilBrown nfsd4_load_reboot_recovery_data(); 322576a3550eSNeilBrown __nfs4_state_start(); 32261da177e4SLinus Torvalds nfs4_init = 1; 3227e8ff2a84SJ. Bruce Fields return; 32281da177e4SLinus Torvalds } 32291da177e4SLinus Torvalds 32301da177e4SLinus Torvalds time_t 32311da177e4SLinus Torvalds nfs4_lease_time(void) 32321da177e4SLinus Torvalds { 32331da177e4SLinus Torvalds return lease_time; 32341da177e4SLinus Torvalds } 32351da177e4SLinus Torvalds 32361da177e4SLinus Torvalds static void 32371da177e4SLinus Torvalds __nfs4_state_shutdown(void) 32381da177e4SLinus Torvalds { 32391da177e4SLinus Torvalds int i; 32401da177e4SLinus Torvalds struct nfs4_client *clp = NULL; 32411da177e4SLinus Torvalds struct nfs4_delegation *dp = NULL; 32421da177e4SLinus Torvalds struct list_head *pos, *next, reaplist; 32431da177e4SLinus Torvalds 32441da177e4SLinus Torvalds for (i = 0; i < CLIENT_HASH_SIZE; i++) { 32451da177e4SLinus Torvalds while (!list_empty(&conf_id_hashtbl[i])) { 32461da177e4SLinus Torvalds clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); 32471da177e4SLinus Torvalds expire_client(clp); 32481da177e4SLinus Torvalds } 32491da177e4SLinus Torvalds while (!list_empty(&unconf_str_hashtbl[i])) { 32501da177e4SLinus Torvalds clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); 32511da177e4SLinus Torvalds expire_client(clp); 32521da177e4SLinus Torvalds } 32531da177e4SLinus Torvalds } 32541da177e4SLinus Torvalds INIT_LIST_HEAD(&reaplist); 32551da177e4SLinus Torvalds spin_lock(&recall_lock); 32561da177e4SLinus Torvalds list_for_each_safe(pos, next, &del_recall_lru) { 32571da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32581da177e4SLinus Torvalds list_move(&dp->dl_recall_lru, &reaplist); 32591da177e4SLinus Torvalds } 32601da177e4SLinus Torvalds spin_unlock(&recall_lock); 32611da177e4SLinus Torvalds list_for_each_safe(pos, next, &reaplist) { 32621da177e4SLinus Torvalds dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); 32631da177e4SLinus Torvalds list_del_init(&dp->dl_recall_lru); 32641da177e4SLinus Torvalds unhash_delegation(dp); 32651da177e4SLinus Torvalds } 32661da177e4SLinus Torvalds 3267190e4fbfSNeilBrown nfsd4_shutdown_recdir(); 32681da177e4SLinus Torvalds nfs4_init = 0; 32691da177e4SLinus Torvalds } 32701da177e4SLinus Torvalds 32711da177e4SLinus Torvalds void 32721da177e4SLinus Torvalds nfs4_state_shutdown(void) 32731da177e4SLinus Torvalds { 32745e8d5c29SNeilBrown cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); 32755e8d5c29SNeilBrown destroy_workqueue(laundry_wq); 32762c5e7615SJ. Bruce Fields locks_end_grace(&nfsd4_manager); 32771da177e4SLinus Torvalds nfs4_lock_state(); 32781da177e4SLinus Torvalds nfs4_release_reclaim(); 32791da177e4SLinus Torvalds __nfs4_state_shutdown(); 32801da177e4SLinus Torvalds nfs4_unlock_state(); 32811da177e4SLinus Torvalds } 32821da177e4SLinus Torvalds 32833dd98a3bSJeff Layton /* 32843dd98a3bSJeff Layton * user_recovery_dirname is protected by the nfsd_mutex since it's only 32853dd98a3bSJeff Layton * accessed when nfsd is starting. 32863dd98a3bSJeff Layton */ 32870964a3d3SNeilBrown static void 32880964a3d3SNeilBrown nfs4_set_recdir(char *recdir) 32890964a3d3SNeilBrown { 32900964a3d3SNeilBrown strcpy(user_recovery_dirname, recdir); 32910964a3d3SNeilBrown } 32920964a3d3SNeilBrown 32930964a3d3SNeilBrown /* 32940964a3d3SNeilBrown * Change the NFSv4 recovery directory to recdir. 32950964a3d3SNeilBrown */ 32960964a3d3SNeilBrown int 32970964a3d3SNeilBrown nfs4_reset_recoverydir(char *recdir) 32980964a3d3SNeilBrown { 32990964a3d3SNeilBrown int status; 3300a63bb996SAl Viro struct path path; 33010964a3d3SNeilBrown 3302a63bb996SAl Viro status = kern_path(recdir, LOOKUP_FOLLOW, &path); 33030964a3d3SNeilBrown if (status) 33040964a3d3SNeilBrown return status; 33050964a3d3SNeilBrown status = -ENOTDIR; 3306a63bb996SAl Viro if (S_ISDIR(path.dentry->d_inode->i_mode)) { 33070964a3d3SNeilBrown nfs4_set_recdir(recdir); 33080964a3d3SNeilBrown status = 0; 33090964a3d3SNeilBrown } 3310a63bb996SAl Viro path_put(&path); 33110964a3d3SNeilBrown return status; 33120964a3d3SNeilBrown } 33130964a3d3SNeilBrown 33143dd98a3bSJeff Layton char * 33153dd98a3bSJeff Layton nfs4_recoverydir(void) 33163dd98a3bSJeff Layton { 33173dd98a3bSJeff Layton return user_recovery_dirname; 33183dd98a3bSJeff Layton } 33193dd98a3bSJeff Layton 33201da177e4SLinus Torvalds /* 33211da177e4SLinus Torvalds * Called when leasetime is changed. 33221da177e4SLinus Torvalds * 3323d99a05adSNeilBrown * The only way the protocol gives us to handle on-the-fly lease changes is to 3324d99a05adSNeilBrown * simulate a reboot. Instead of doing that, we just wait till the next time 3325d99a05adSNeilBrown * we start to register any changes in lease time. If the administrator 3326d99a05adSNeilBrown * really wants to change the lease time *now*, they can go ahead and bring 3327d99a05adSNeilBrown * nfsd down and then back up again after changing the lease time. 33283dd98a3bSJeff Layton * 33293dd98a3bSJeff Layton * user_lease_time is protected by nfsd_mutex since it's only really accessed 33303dd98a3bSJeff Layton * when nfsd is starting 33311da177e4SLinus Torvalds */ 33321da177e4SLinus Torvalds void 33331da177e4SLinus Torvalds nfs4_reset_lease(time_t leasetime) 33341da177e4SLinus Torvalds { 3335d99a05adSNeilBrown user_lease_time = leasetime; 33361da177e4SLinus Torvalds } 3337