Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/nfsd/nfs4state.c |
| 3 | * |
| 4 | * Copyright (c) 2001 The Regents of the University of Michigan. |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Kendrick Smith <kmsmith@umich.edu> |
| 8 | * Andy Adamson <kandros@umich.edu> |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions and the following disclaimer. |
| 16 | * 2. Redistributions in binary form must reproduce the above copyright |
| 17 | * notice, this list of conditions and the following disclaimer in the |
| 18 | * documentation and/or other materials provided with the distribution. |
| 19 | * 3. Neither the name of the University nor the names of its |
| 20 | * contributors may be used to endorse or promote products derived |
| 21 | * from this software without specific prior written permission. |
| 22 | * |
| 23 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 24 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 25 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 26 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| 30 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 31 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 32 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 33 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 34 | * |
| 35 | */ |
| 36 | |
| 37 | #include <linux/param.h> |
| 38 | #include <linux/major.h> |
| 39 | #include <linux/slab.h> |
| 40 | |
| 41 | #include <linux/sunrpc/svc.h> |
| 42 | #include <linux/nfsd/nfsd.h> |
| 43 | #include <linux/nfsd/cache.h> |
| 44 | #include <linux/mount.h> |
| 45 | #include <linux/workqueue.h> |
| 46 | #include <linux/smp_lock.h> |
| 47 | #include <linux/kthread.h> |
| 48 | #include <linux/nfs4.h> |
| 49 | #include <linux/nfsd/state.h> |
| 50 | #include <linux/nfsd/xdr4.h> |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 51 | #include <linux/namei.h> |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 52 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 55 | |
| 56 | /* Globals */ |
| 57 | static time_t lease_time = 90; /* default lease time */ |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 58 | static time_t user_lease_time = 90; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 59 | static time_t boot_time; |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 60 | static int in_grace = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static u32 current_clientid = 1; |
| 62 | static u32 current_ownerid = 1; |
| 63 | static u32 current_fileid = 1; |
| 64 | static u32 current_delegid = 1; |
| 65 | static u32 nfs4_init; |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 66 | static stateid_t zerostateid; /* bits all 0 */ |
| 67 | static stateid_t onestateid; /* bits all 1 */ |
| 68 | |
| 69 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) |
| 70 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | /* forward declarations */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 73 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
| 75 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 76 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
| 77 | static void nfs4_set_recdir(char *recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* Locking: |
| 80 | * |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 81 | * client_mutex: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
| 83 | * unconfstr_hashtbl[], uncofid_hashtbl[]. |
| 84 | */ |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 85 | static DEFINE_MUTEX(client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 87 | static kmem_cache_t *stateowner_slab = NULL; |
| 88 | static kmem_cache_t *file_slab = NULL; |
| 89 | static kmem_cache_t *stateid_slab = NULL; |
| 90 | static kmem_cache_t *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | void |
| 93 | nfs4_lock_state(void) |
| 94 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 95 | mutex_lock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | } |
| 97 | |
| 98 | void |
| 99 | nfs4_unlock_state(void) |
| 100 | { |
Ingo Molnar | 353ab6e | 2006-03-26 01:37:12 -0800 | [diff] [blame] | 101 | mutex_unlock(&client_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | } |
| 103 | |
| 104 | static inline u32 |
| 105 | opaque_hashval(const void *ptr, int nbytes) |
| 106 | { |
| 107 | unsigned char *cptr = (unsigned char *) ptr; |
| 108 | |
| 109 | u32 x = 0; |
| 110 | while (nbytes--) { |
| 111 | x *= 37; |
| 112 | x += *cptr++; |
| 113 | } |
| 114 | return x; |
| 115 | } |
| 116 | |
| 117 | /* forward declarations */ |
| 118 | static void release_stateowner(struct nfs4_stateowner *sop); |
| 119 | static void release_stateid(struct nfs4_stateid *stp, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | |
| 121 | /* |
| 122 | * Delegation state |
| 123 | */ |
| 124 | |
| 125 | /* recall_lock protects the del_recall_lru */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 126 | static spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | static struct list_head del_recall_lru; |
| 128 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 129 | static void |
| 130 | free_nfs4_file(struct kref *kref) |
| 131 | { |
| 132 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); |
| 133 | list_del(&fp->fi_hash); |
| 134 | iput(fp->fi_inode); |
| 135 | kmem_cache_free(file_slab, fp); |
| 136 | } |
| 137 | |
| 138 | static inline void |
| 139 | put_nfs4_file(struct nfs4_file *fi) |
| 140 | { |
| 141 | kref_put(&fi->fi_ref, free_nfs4_file); |
| 142 | } |
| 143 | |
| 144 | static inline void |
| 145 | get_nfs4_file(struct nfs4_file *fi) |
| 146 | { |
| 147 | kref_get(&fi->fi_ref); |
| 148 | } |
| 149 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | static struct nfs4_delegation * |
| 151 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) |
| 152 | { |
| 153 | struct nfs4_delegation *dp; |
| 154 | struct nfs4_file *fp = stp->st_file; |
| 155 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; |
| 156 | |
| 157 | dprintk("NFSD alloc_init_deleg\n"); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 158 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
| 159 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 160 | return dp; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 161 | INIT_LIST_HEAD(&dp->dl_perfile); |
| 162 | INIT_LIST_HEAD(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
| 164 | dp->dl_client = clp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 165 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | dp->dl_file = fp; |
| 167 | dp->dl_flock = NULL; |
| 168 | get_file(stp->st_vfs_file); |
| 169 | dp->dl_vfs_file = stp->st_vfs_file; |
| 170 | dp->dl_type = type; |
| 171 | dp->dl_recall.cbr_dp = NULL; |
| 172 | dp->dl_recall.cbr_ident = cb->cb_ident; |
| 173 | dp->dl_recall.cbr_trunc = 0; |
| 174 | dp->dl_stateid.si_boot = boot_time; |
| 175 | dp->dl_stateid.si_stateownerid = current_delegid++; |
| 176 | dp->dl_stateid.si_fileid = 0; |
| 177 | dp->dl_stateid.si_generation = 0; |
| 178 | dp->dl_fhlen = current_fh->fh_handle.fh_size; |
| 179 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, |
| 180 | current_fh->fh_handle.fh_size); |
| 181 | dp->dl_time = 0; |
| 182 | atomic_set(&dp->dl_count, 1); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 183 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
| 184 | list_add(&dp->dl_perclnt, &clp->cl_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | return dp; |
| 186 | } |
| 187 | |
| 188 | void |
| 189 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 190 | { |
| 191 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 192 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 193 | put_nfs4_file(dp->dl_file); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 194 | kmem_cache_free(deleg_slab, dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | } |
| 197 | |
| 198 | /* Remove the associated file_lock first, then remove the delegation. |
| 199 | * lease_modify() is called to remove the FS_LEASE file_lock from |
| 200 | * the i_flock list, eventually calling nfsd's lock_manager |
| 201 | * fl_release_callback. |
| 202 | */ |
| 203 | static void |
| 204 | nfs4_close_delegation(struct nfs4_delegation *dp) |
| 205 | { |
| 206 | struct file *filp = dp->dl_vfs_file; |
| 207 | |
| 208 | dprintk("NFSD: close_delegation dp %p\n",dp); |
| 209 | dp->dl_vfs_file = NULL; |
| 210 | /* The following nfsd_close may not actually close the file, |
| 211 | * but we want to remove the lease in any case. */ |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 212 | if (dp->dl_flock) |
| 213 | setlease(filp, F_UNLCK, &dp->dl_flock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | } |
| 216 | |
| 217 | /* Called under the state lock. */ |
| 218 | static void |
| 219 | unhash_delegation(struct nfs4_delegation *dp) |
| 220 | { |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 221 | list_del_init(&dp->dl_perfile); |
| 222 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | spin_lock(&recall_lock); |
| 224 | list_del_init(&dp->dl_recall_lru); |
| 225 | spin_unlock(&recall_lock); |
| 226 | nfs4_close_delegation(dp); |
| 227 | nfs4_put_delegation(dp); |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * SETCLIENTID state |
| 232 | */ |
| 233 | |
| 234 | /* Hash tables for nfs4_clientid state */ |
| 235 | #define CLIENT_HASH_BITS 4 |
| 236 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 237 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 238 | |
| 239 | #define clientid_hashval(id) \ |
| 240 | ((id) & CLIENT_HASH_MASK) |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 241 | #define clientstr_hashval(name) \ |
| 242 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | /* |
| 244 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 245 | * used in reboot/reset lease grace period processing |
| 246 | * |
| 247 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 248 | * setclientid_confirmed info. |
| 249 | * |
| 250 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 251 | * setclientid info. |
| 252 | * |
| 253 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 254 | * for lease renewal. |
| 255 | * |
| 256 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 257 | * for last close replay. |
| 258 | */ |
| 259 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 260 | static int reclaim_str_hashtbl_size = 0; |
| 261 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 262 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 263 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 264 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 265 | static struct list_head client_lru; |
| 266 | static struct list_head close_lru; |
| 267 | |
| 268 | static inline void |
| 269 | renew_client(struct nfs4_client *clp) |
| 270 | { |
| 271 | /* |
| 272 | * Move client to the end to the LRU list. |
| 273 | */ |
| 274 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 275 | clp->cl_clientid.cl_boot, |
| 276 | clp->cl_clientid.cl_id); |
| 277 | list_move_tail(&clp->cl_lru, &client_lru); |
| 278 | clp->cl_time = get_seconds(); |
| 279 | } |
| 280 | |
| 281 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 282 | static int |
| 283 | STALE_CLIENTID(clientid_t *clid) |
| 284 | { |
| 285 | if (clid->cl_boot == boot_time) |
| 286 | return 0; |
| 287 | dprintk("NFSD stale clientid (%08x/%08x)\n", |
| 288 | clid->cl_boot, clid->cl_id); |
| 289 | return 1; |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * XXX Should we use a slab cache ? |
| 294 | * This type of memory management is somewhat inefficient, but we use it |
| 295 | * anyway since SETCLIENTID is not a common operation. |
| 296 | */ |
| 297 | static inline struct nfs4_client * |
| 298 | alloc_client(struct xdr_netobj name) |
| 299 | { |
| 300 | struct nfs4_client *clp; |
| 301 | |
| 302 | if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { |
| 303 | memset(clp, 0, sizeof(*clp)); |
| 304 | if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { |
| 305 | memcpy(clp->cl_name.data, name.data, name.len); |
| 306 | clp->cl_name.len = name.len; |
| 307 | } |
| 308 | else { |
| 309 | kfree(clp); |
| 310 | clp = NULL; |
| 311 | } |
| 312 | } |
| 313 | return clp; |
| 314 | } |
| 315 | |
| 316 | static inline void |
| 317 | free_client(struct nfs4_client *clp) |
| 318 | { |
| 319 | if (clp->cl_cred.cr_group_info) |
| 320 | put_group_info(clp->cl_cred.cr_group_info); |
| 321 | kfree(clp->cl_name.data); |
| 322 | kfree(clp); |
| 323 | } |
| 324 | |
| 325 | void |
| 326 | put_nfs4_client(struct nfs4_client *clp) |
| 327 | { |
| 328 | if (atomic_dec_and_test(&clp->cl_count)) |
| 329 | free_client(clp); |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | expire_client(struct nfs4_client *clp) |
| 334 | { |
| 335 | struct nfs4_stateowner *sop; |
| 336 | struct nfs4_delegation *dp; |
| 337 | struct nfs4_callback *cb = &clp->cl_callback; |
| 338 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; |
| 339 | struct list_head reaplist; |
| 340 | |
| 341 | dprintk("NFSD: expire_client cl_count %d\n", |
| 342 | atomic_read(&clp->cl_count)); |
| 343 | |
| 344 | /* shutdown rpc client, ending any outstanding recall rpcs */ |
| 345 | if (atomic_read(&cb->cb_set) == 1 && clnt) { |
| 346 | rpc_shutdown_client(clnt); |
| 347 | clnt = clp->cl_callback.cb_client = NULL; |
| 348 | } |
| 349 | |
| 350 | INIT_LIST_HEAD(&reaplist); |
| 351 | spin_lock(&recall_lock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 352 | while (!list_empty(&clp->cl_delegations)) { |
| 353 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 355 | dp->dl_flock); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 356 | list_del_init(&dp->dl_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | list_move(&dp->dl_recall_lru, &reaplist); |
| 358 | } |
| 359 | spin_unlock(&recall_lock); |
| 360 | while (!list_empty(&reaplist)) { |
| 361 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 362 | list_del_init(&dp->dl_recall_lru); |
| 363 | unhash_delegation(dp); |
| 364 | } |
| 365 | list_del(&clp->cl_idhash); |
| 366 | list_del(&clp->cl_strhash); |
| 367 | list_del(&clp->cl_lru); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 368 | while (!list_empty(&clp->cl_openowners)) { |
| 369 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | release_stateowner(sop); |
| 371 | } |
| 372 | put_nfs4_client(clp); |
| 373 | } |
| 374 | |
| 375 | static struct nfs4_client * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 376 | create_client(struct xdr_netobj name, char *recdir) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | struct nfs4_client *clp; |
| 378 | |
| 379 | if (!(clp = alloc_client(name))) |
| 380 | goto out; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 381 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | atomic_set(&clp->cl_count, 1); |
| 383 | atomic_set(&clp->cl_callback.cb_set, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 385 | INIT_LIST_HEAD(&clp->cl_strhash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 386 | INIT_LIST_HEAD(&clp->cl_openowners); |
| 387 | INIT_LIST_HEAD(&clp->cl_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | INIT_LIST_HEAD(&clp->cl_lru); |
| 389 | out: |
| 390 | return clp; |
| 391 | } |
| 392 | |
| 393 | static void |
| 394 | copy_verf(struct nfs4_client *target, nfs4_verifier *source) { |
| 395 | memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); |
| 396 | } |
| 397 | |
| 398 | static void |
| 399 | copy_clid(struct nfs4_client *target, struct nfs4_client *source) { |
| 400 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 401 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 402 | } |
| 403 | |
| 404 | static void |
| 405 | copy_cred(struct svc_cred *target, struct svc_cred *source) { |
| 406 | |
| 407 | target->cr_uid = source->cr_uid; |
| 408 | target->cr_gid = source->cr_gid; |
| 409 | target->cr_group_info = source->cr_group_info; |
| 410 | get_group_info(target->cr_group_info); |
| 411 | } |
| 412 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 413 | static inline int |
| 414 | same_name(const char *n1, const char *n2) { |
| 415 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | static int |
| 419 | cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { |
| 420 | return(!memcmp(v1->data,v2->data,sizeof(v1->data))); |
| 421 | } |
| 422 | |
| 423 | static int |
| 424 | cmp_clid(clientid_t * cl1, clientid_t * cl2) { |
| 425 | return((cl1->cl_boot == cl2->cl_boot) && |
| 426 | (cl1->cl_id == cl2->cl_id)); |
| 427 | } |
| 428 | |
| 429 | /* XXX what about NGROUP */ |
| 430 | static int |
| 431 | cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ |
| 432 | return(cr1->cr_uid == cr2->cr_uid); |
| 433 | |
| 434 | } |
| 435 | |
| 436 | static void |
| 437 | gen_clid(struct nfs4_client *clp) { |
| 438 | clp->cl_clientid.cl_boot = boot_time; |
| 439 | clp->cl_clientid.cl_id = current_clientid++; |
| 440 | } |
| 441 | |
| 442 | static void |
| 443 | gen_confirm(struct nfs4_client *clp) { |
| 444 | struct timespec tv; |
| 445 | u32 * p; |
| 446 | |
| 447 | tv = CURRENT_TIME; |
| 448 | p = (u32 *)clp->cl_confirm.data; |
| 449 | *p++ = tv.tv_sec; |
| 450 | *p++ = tv.tv_nsec; |
| 451 | } |
| 452 | |
| 453 | static int |
| 454 | check_name(struct xdr_netobj name) { |
| 455 | |
| 456 | if (name.len == 0) |
| 457 | return 0; |
| 458 | if (name.len > NFS4_OPAQUE_LIMIT) { |
| 459 | printk("NFSD: check_name: name too long(%d)!\n", name.len); |
| 460 | return 0; |
| 461 | } |
| 462 | return 1; |
| 463 | } |
| 464 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 465 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 467 | { |
| 468 | unsigned int idhashval; |
| 469 | |
| 470 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 471 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 472 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
| 473 | list_add_tail(&clp->cl_lru, &client_lru); |
| 474 | clp->cl_time = get_seconds(); |
| 475 | } |
| 476 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 477 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | move_to_confirmed(struct nfs4_client *clp) |
| 479 | { |
| 480 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 481 | unsigned int strhashval; |
| 482 | |
| 483 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
| 484 | list_del_init(&clp->cl_strhash); |
| 485 | list_del_init(&clp->cl_idhash); |
| 486 | list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 487 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 488 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
| 489 | renew_client(clp); |
| 490 | } |
| 491 | |
| 492 | static struct nfs4_client * |
| 493 | find_confirmed_client(clientid_t *clid) |
| 494 | { |
| 495 | struct nfs4_client *clp; |
| 496 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 497 | |
| 498 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
| 499 | if (cmp_clid(&clp->cl_clientid, clid)) |
| 500 | return clp; |
| 501 | } |
| 502 | return NULL; |
| 503 | } |
| 504 | |
| 505 | static struct nfs4_client * |
| 506 | find_unconfirmed_client(clientid_t *clid) |
| 507 | { |
| 508 | struct nfs4_client *clp; |
| 509 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 510 | |
| 511 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
| 512 | if (cmp_clid(&clp->cl_clientid, clid)) |
| 513 | return clp; |
| 514 | } |
| 515 | return NULL; |
| 516 | } |
| 517 | |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 518 | static struct nfs4_client * |
| 519 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) |
| 520 | { |
| 521 | struct nfs4_client *clp; |
| 522 | |
| 523 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { |
| 524 | if (same_name(clp->cl_recdir, dname)) |
| 525 | return clp; |
| 526 | } |
| 527 | return NULL; |
| 528 | } |
| 529 | |
| 530 | static struct nfs4_client * |
| 531 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) |
| 532 | { |
| 533 | struct nfs4_client *clp; |
| 534 | |
| 535 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { |
| 536 | if (same_name(clp->cl_recdir, dname)) |
| 537 | return clp; |
| 538 | } |
| 539 | return NULL; |
| 540 | } |
| 541 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | /* a helper function for parse_callback */ |
| 543 | static int |
| 544 | parse_octet(unsigned int *lenp, char **addrp) |
| 545 | { |
| 546 | unsigned int len = *lenp; |
| 547 | char *p = *addrp; |
| 548 | int n = -1; |
| 549 | char c; |
| 550 | |
| 551 | for (;;) { |
| 552 | if (!len) |
| 553 | break; |
| 554 | len--; |
| 555 | c = *p++; |
| 556 | if (c == '.') |
| 557 | break; |
| 558 | if ((c < '0') || (c > '9')) { |
| 559 | n = -1; |
| 560 | break; |
| 561 | } |
| 562 | if (n < 0) |
| 563 | n = 0; |
| 564 | n = (n * 10) + (c - '0'); |
| 565 | if (n > 255) { |
| 566 | n = -1; |
| 567 | break; |
| 568 | } |
| 569 | } |
| 570 | *lenp = len; |
| 571 | *addrp = p; |
| 572 | return n; |
| 573 | } |
| 574 | |
| 575 | /* parse and set the setclientid ipv4 callback address */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 576 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 577 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
| 578 | { |
| 579 | int temp = 0; |
| 580 | u32 cbaddr = 0; |
| 581 | u16 cbport = 0; |
| 582 | u32 addrlen = addr_len; |
| 583 | char *addr = addr_val; |
| 584 | int i, shift; |
| 585 | |
| 586 | /* ipaddress */ |
| 587 | shift = 24; |
| 588 | for(i = 4; i > 0 ; i--) { |
| 589 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 590 | return 0; |
| 591 | } |
| 592 | cbaddr |= (temp << shift); |
| 593 | if (shift > 0) |
| 594 | shift -= 8; |
| 595 | } |
| 596 | *cbaddrp = cbaddr; |
| 597 | |
| 598 | /* port */ |
| 599 | shift = 8; |
| 600 | for(i = 2; i > 0 ; i--) { |
| 601 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 602 | return 0; |
| 603 | } |
| 604 | cbport |= (temp << shift); |
| 605 | if (shift > 0) |
| 606 | shift -= 8; |
| 607 | } |
| 608 | *cbportp = cbport; |
| 609 | return 1; |
| 610 | } |
| 611 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 612 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
| 614 | { |
| 615 | struct nfs4_callback *cb = &clp->cl_callback; |
| 616 | |
| 617 | /* Currently, we only support tcp for the callback channel */ |
| 618 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) |
| 619 | goto out_err; |
| 620 | |
| 621 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, |
| 622 | &cb->cb_addr, &cb->cb_port))) |
| 623 | goto out_err; |
| 624 | cb->cb_prog = se->se_callback_prog; |
| 625 | cb->cb_ident = se->se_callback_ident; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | return; |
| 627 | out_err: |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 628 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | "will not receive delegations\n", |
| 630 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 631 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | return; |
| 633 | } |
| 634 | |
| 635 | /* |
| 636 | * RFC 3010 has a complex implmentation description of processing a |
| 637 | * SETCLIENTID request consisting of 5 bullets, labeled as |
| 638 | * CASE0 - CASE4 below. |
| 639 | * |
| 640 | * NOTES: |
| 641 | * callback information will be processed in a future patch |
| 642 | * |
| 643 | * an unconfirmed record is added when: |
| 644 | * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. |
| 645 | * CASE 1: confirmed record found with matching name, principal, |
| 646 | * verifier, and clientid. |
| 647 | * CASE 2: confirmed record found with matching name, principal, |
| 648 | * and there is no unconfirmed record with matching |
| 649 | * name and principal |
| 650 | * |
| 651 | * an unconfirmed record is replaced when: |
| 652 | * CASE 3: confirmed record found with matching name, principal, |
| 653 | * and an unconfirmed record is found with matching |
| 654 | * name, principal, and with clientid and |
| 655 | * confirm that does not match the confirmed record. |
| 656 | * CASE 4: there is no confirmed record with matching name and |
| 657 | * principal. there is an unconfirmed record with |
| 658 | * matching name, principal. |
| 659 | * |
| 660 | * an unconfirmed record is deleted when: |
| 661 | * CASE 1: an unconfirmed record that matches input name, verifier, |
| 662 | * and confirmed clientid. |
| 663 | * CASE 4: any unconfirmed records with matching name and principal |
| 664 | * that exist after an unconfirmed record has been replaced |
| 665 | * as described above. |
| 666 | * |
| 667 | */ |
| 668 | int |
| 669 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) |
| 670 | { |
| 671 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; |
| 672 | struct xdr_netobj clname = { |
| 673 | .len = setclid->se_namelen, |
| 674 | .data = setclid->se_name, |
| 675 | }; |
| 676 | nfs4_verifier clverifier = setclid->se_verf; |
| 677 | unsigned int strhashval; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 678 | struct nfs4_client *conf, *unconf, *new; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | int status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 680 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | if (!check_name(clname)) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 683 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 685 | status = nfs4_make_rec_clidname(dname, &clname); |
| 686 | if (status) |
Neil Brown | 73aea4e | 2005-09-13 01:25:39 -0700 | [diff] [blame] | 687 | return status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | /* |
| 690 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 691 | * We get here on a DRC miss. |
| 692 | */ |
| 693 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 694 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 695 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | nfs4_lock_state(); |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 697 | conf = find_confirmed_client_by_str(dname, strhashval); |
| 698 | if (conf) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | /* |
| 700 | * CASE 0: |
| 701 | * clname match, confirmed, different principal |
| 702 | * or different ip_address |
| 703 | */ |
| 704 | status = nfserr_clid_inuse; |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 705 | if (!cmp_creds(&conf->cl_cred, &rqstp->rq_cred) |
| 706 | || conf->cl_addr != ip_addr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 707 | printk("NFSD: setclientid: string in use by client" |
| 708 | "(clientid %08x/%08x)\n", |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 709 | conf->cl_clientid.cl_boot, conf->cl_clientid.cl_id); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | goto out; |
| 711 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | } |
NeilBrown | 28ce605 | 2005-06-23 22:03:56 -0700 | [diff] [blame] | 713 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | status = nfserr_resource; |
| 715 | if (!conf) { |
| 716 | /* |
| 717 | * CASE 4: |
| 718 | * placed first, because it is the normal case. |
| 719 | */ |
| 720 | if (unconf) |
| 721 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 722 | new = create_client(clname, dname); |
| 723 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 724 | goto out; |
| 725 | copy_verf(new, &clverifier); |
| 726 | new->cl_addr = ip_addr; |
| 727 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 728 | gen_clid(new); |
| 729 | gen_confirm(new); |
| 730 | gen_callback(new, setclid); |
| 731 | add_to_unconfirmed(new, strhashval); |
| 732 | } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { |
| 733 | /* |
| 734 | * CASE 1: |
| 735 | * cl_name match, confirmed, principal match |
| 736 | * verifier match: probable callback update |
| 737 | * |
| 738 | * remove any unconfirmed nfs4_client with |
| 739 | * matching cl_name, cl_verifier, and cl_clientid |
| 740 | * |
| 741 | * create and insert an unconfirmed nfs4_client with same |
| 742 | * cl_name, cl_verifier, and cl_clientid as existing |
| 743 | * nfs4_client, but with the new callback info and a |
| 744 | * new cl_confirm |
| 745 | */ |
NeilBrown | 31f4a6c | 2005-06-23 22:04:06 -0700 | [diff] [blame] | 746 | if (unconf) { |
| 747 | /* Note this is removing unconfirmed {*x***}, |
| 748 | * which is stronger than RFC recommended {vxc**}. |
| 749 | * This has the advantage that there is at most |
| 750 | * one {*x***} in either list at any time. |
| 751 | */ |
| 752 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 754 | new = create_client(clname, dname); |
| 755 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | goto out; |
| 757 | copy_verf(new,&conf->cl_verifier); |
| 758 | new->cl_addr = ip_addr; |
| 759 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 760 | copy_clid(new, conf); |
| 761 | gen_confirm(new); |
| 762 | gen_callback(new, setclid); |
| 763 | add_to_unconfirmed(new,strhashval); |
| 764 | } else if (!unconf) { |
| 765 | /* |
| 766 | * CASE 2: |
| 767 | * clname match, confirmed, principal match |
| 768 | * verfier does not match |
| 769 | * no unconfirmed. create a new unconfirmed nfs4_client |
| 770 | * using input clverifier, clname, and callback info |
| 771 | * and generate a new cl_clientid and cl_confirm. |
| 772 | */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 773 | new = create_client(clname, dname); |
| 774 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 775 | goto out; |
| 776 | copy_verf(new,&clverifier); |
| 777 | new->cl_addr = ip_addr; |
| 778 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 779 | gen_clid(new); |
| 780 | gen_confirm(new); |
| 781 | gen_callback(new, setclid); |
| 782 | add_to_unconfirmed(new, strhashval); |
| 783 | } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { |
| 784 | /* |
| 785 | * CASE3: |
| 786 | * confirmed found (name, principal match) |
| 787 | * confirmed verifier does not match input clverifier |
| 788 | * |
| 789 | * unconfirmed found (name match) |
| 790 | * confirmed->cl_confirm != unconfirmed->cl_confirm |
| 791 | * |
| 792 | * remove unconfirmed. |
| 793 | * |
| 794 | * create an unconfirmed nfs4_client |
| 795 | * with same cl_name as existing confirmed nfs4_client, |
| 796 | * but with new callback info, new cl_clientid, |
| 797 | * new cl_verifier and a new cl_confirm |
| 798 | */ |
| 799 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 800 | new = create_client(clname, dname); |
| 801 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | goto out; |
| 803 | copy_verf(new,&clverifier); |
| 804 | new->cl_addr = ip_addr; |
| 805 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 806 | gen_clid(new); |
| 807 | gen_confirm(new); |
| 808 | gen_callback(new, setclid); |
| 809 | add_to_unconfirmed(new, strhashval); |
| 810 | } else { |
| 811 | /* No cases hit !!! */ |
| 812 | status = nfserr_inval; |
| 813 | goto out; |
| 814 | |
| 815 | } |
| 816 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 817 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 818 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 819 | status = nfs_ok; |
| 820 | out: |
| 821 | nfs4_unlock_state(); |
| 822 | return status; |
| 823 | } |
| 824 | |
| 825 | |
| 826 | /* |
| 827 | * RFC 3010 has a complex implmentation description of processing a |
| 828 | * SETCLIENTID_CONFIRM request consisting of 4 bullets describing |
| 829 | * processing on a DRC miss, labeled as CASE1 - CASE4 below. |
| 830 | * |
| 831 | * NOTE: callback information will be processed here in a future patch |
| 832 | */ |
| 833 | int |
| 834 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) |
| 835 | { |
| 836 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 837 | struct nfs4_client *conf, *unconf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 839 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
| 840 | int status; |
| 841 | |
| 842 | if (STALE_CLIENTID(clid)) |
| 843 | return nfserr_stale_clientid; |
| 844 | /* |
| 845 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 846 | * We get here on a DRC miss. |
| 847 | */ |
| 848 | |
| 849 | nfs4_lock_state(); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 850 | |
| 851 | conf = find_confirmed_client(clid); |
| 852 | unconf = find_unconfirmed_client(clid); |
| 853 | |
| 854 | status = nfserr_clid_inuse; |
| 855 | if (conf && conf->cl_addr != ip_addr) |
| 856 | goto out; |
| 857 | if (unconf && unconf->cl_addr != ip_addr) |
| 858 | goto out; |
| 859 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 860 | if ((conf && unconf) && |
| 861 | (cmp_verf(&unconf->cl_confirm, &confirm)) && |
| 862 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 863 | (same_name(conf->cl_recdir,unconf->cl_recdir)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 865 | /* CASE 1: |
| 866 | * unconf record that matches input clientid and input confirm. |
| 867 | * conf record that matches input clientid. |
| 868 | * conf and unconf records match names, verifiers |
| 869 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 870 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) |
| 871 | status = nfserr_clid_inuse; |
| 872 | else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 873 | /* XXX: We just turn off callbacks until we can handle |
| 874 | * change request correctly. */ |
NeilBrown | cb36d63 | 2005-06-23 22:04:23 -0700 | [diff] [blame] | 875 | atomic_set(&conf->cl_callback.cb_set, 0); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 876 | gen_confirm(conf); |
NeilBrown | 4630902 | 2005-07-07 17:59:10 -0700 | [diff] [blame] | 877 | nfsd4_remove_clid_dir(unconf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 878 | expire_client(unconf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 879 | status = nfs_ok; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | } |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 882 | } else if ((conf && !unconf) || |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 883 | ((conf && unconf) && |
| 884 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 885 | !same_name(conf->cl_recdir, unconf->cl_recdir)))) { |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 886 | /* CASE 2: |
| 887 | * conf record that matches input clientid. |
| 888 | * if unconf record matches input clientid, then |
| 889 | * unconf->cl_name or unconf->cl_verifier don't match the |
| 890 | * conf record. |
| 891 | */ |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 892 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 893 | status = nfserr_clid_inuse; |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 894 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | status = nfs_ok; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 896 | } else if (!conf && unconf |
| 897 | && cmp_verf(&unconf->cl_confirm, &confirm)) { |
| 898 | /* CASE 3: |
| 899 | * conf record not found. |
| 900 | * unconf record found. |
| 901 | * unconf->cl_confirm matches input confirm |
| 902 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
| 904 | status = nfserr_clid_inuse; |
| 905 | } else { |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 906 | unsigned int hash = |
| 907 | clientstr_hashval(unconf->cl_recdir); |
| 908 | conf = find_confirmed_client_by_str(unconf->cl_recdir, |
| 909 | hash); |
| 910 | if (conf) { |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 911 | nfsd4_remove_clid_dir(conf); |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 912 | expire_client(conf); |
| 913 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | move_to_confirmed(unconf); |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 915 | conf = unconf; |
NeilBrown | 1a69c17 | 2005-06-23 22:04:08 -0700 | [diff] [blame] | 916 | status = nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 917 | } |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 918 | } else if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) |
| 919 | && (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, |
| 920 | &confirm)))) { |
| 921 | /* CASE 4: |
| 922 | * conf record not found, or if conf, conf->cl_confirm does not |
| 923 | * match input confirm. |
| 924 | * unconf record not found, or if unconf, unconf->cl_confirm |
| 925 | * does not match input confirm. |
| 926 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | status = nfserr_stale_clientid; |
NeilBrown | 7c79f73 | 2005-06-23 22:04:13 -0700 | [diff] [blame] | 928 | } else { |
NeilBrown | 08e8987 | 2005-06-23 22:04:11 -0700 | [diff] [blame] | 929 | /* check that we have hit one of the cases...*/ |
| 930 | status = nfserr_clid_inuse; |
| 931 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 932 | out: |
| 933 | if (!status) |
NeilBrown | 21ab45a | 2005-06-23 22:04:14 -0700 | [diff] [blame] | 934 | nfsd4_probe_callback(conf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | nfs4_unlock_state(); |
| 936 | return status; |
| 937 | } |
| 938 | |
| 939 | /* |
| 940 | * Open owner state (share locks) |
| 941 | */ |
| 942 | |
| 943 | /* hash tables for nfs4_stateowner */ |
| 944 | #define OWNER_HASH_BITS 8 |
| 945 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 946 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
| 947 | |
| 948 | #define ownerid_hashval(id) \ |
| 949 | ((id) & OWNER_HASH_MASK) |
| 950 | #define ownerstr_hashval(clientid, ownername) \ |
| 951 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) |
| 952 | |
| 953 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; |
| 954 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
| 955 | |
| 956 | /* hash table for nfs4_file */ |
| 957 | #define FILE_HASH_BITS 8 |
| 958 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
| 959 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) |
| 960 | /* hash table for (open)nfs4_stateid */ |
| 961 | #define STATEID_HASH_BITS 10 |
| 962 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) |
| 963 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) |
| 964 | |
| 965 | #define file_hashval(x) \ |
| 966 | hash_ptr(x, FILE_HASH_BITS) |
| 967 | #define stateid_hashval(owner_id, file_id) \ |
| 968 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) |
| 969 | |
| 970 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
| 971 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; |
| 972 | |
| 973 | /* OPEN Share state helper functions */ |
| 974 | static inline struct nfs4_file * |
| 975 | alloc_init_file(struct inode *ino) |
| 976 | { |
| 977 | struct nfs4_file *fp; |
| 978 | unsigned int hashval = file_hashval(ino); |
| 979 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 980 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 981 | if (fp) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 982 | kref_init(&fp->fi_ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 984 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 985 | INIT_LIST_HEAD(&fp->fi_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
| 987 | fp->fi_inode = igrab(ino); |
| 988 | fp->fi_id = current_fileid++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 989 | return fp; |
| 990 | } |
| 991 | return NULL; |
| 992 | } |
| 993 | |
| 994 | static void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 995 | nfsd4_free_slab(kmem_cache_t **slab) |
| 996 | { |
| 997 | int status; |
| 998 | |
| 999 | if (*slab == NULL) |
| 1000 | return; |
| 1001 | status = kmem_cache_destroy(*slab); |
| 1002 | *slab = NULL; |
| 1003 | WARN_ON(status); |
| 1004 | } |
| 1005 | |
| 1006 | static void |
| 1007 | nfsd4_free_slabs(void) |
| 1008 | { |
| 1009 | nfsd4_free_slab(&stateowner_slab); |
| 1010 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1011 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1012 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1013 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1014 | |
| 1015 | static int |
| 1016 | nfsd4_init_slabs(void) |
| 1017 | { |
| 1018 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
| 1019 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1020 | if (stateowner_slab == NULL) |
| 1021 | goto out_nomem; |
| 1022 | file_slab = kmem_cache_create("nfsd4_files", |
| 1023 | sizeof(struct nfs4_file), 0, 0, NULL, NULL); |
| 1024 | if (file_slab == NULL) |
| 1025 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1026 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
| 1027 | sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); |
| 1028 | if (stateid_slab == NULL) |
| 1029 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1030 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
| 1031 | sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); |
| 1032 | if (deleg_slab == NULL) |
| 1033 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1034 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1035 | out_nomem: |
| 1036 | nfsd4_free_slabs(); |
| 1037 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1038 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | } |
| 1040 | |
| 1041 | void |
| 1042 | nfs4_free_stateowner(struct kref *kref) |
| 1043 | { |
| 1044 | struct nfs4_stateowner *sop = |
| 1045 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1046 | kfree(sop->so_owner.data); |
| 1047 | kmem_cache_free(stateowner_slab, sop); |
| 1048 | } |
| 1049 | |
| 1050 | static inline struct nfs4_stateowner * |
| 1051 | alloc_stateowner(struct xdr_netobj *owner) |
| 1052 | { |
| 1053 | struct nfs4_stateowner *sop; |
| 1054 | |
| 1055 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1056 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1057 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1058 | sop->so_owner.len = owner->len; |
| 1059 | kref_init(&sop->so_ref); |
| 1060 | return sop; |
| 1061 | } |
| 1062 | kmem_cache_free(stateowner_slab, sop); |
| 1063 | } |
| 1064 | return NULL; |
| 1065 | } |
| 1066 | |
| 1067 | static struct nfs4_stateowner * |
| 1068 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1069 | struct nfs4_stateowner *sop; |
| 1070 | struct nfs4_replay *rp; |
| 1071 | unsigned int idhashval; |
| 1072 | |
| 1073 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1074 | return NULL; |
| 1075 | idhashval = ownerid_hashval(current_ownerid); |
| 1076 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1077 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1078 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1079 | INIT_LIST_HEAD(&sop->so_stateids); |
| 1080 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1082 | sop->so_time = 0; |
| 1083 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1084 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1085 | list_add(&sop->so_perclient, &clp->cl_openowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | sop->so_is_open_owner = 1; |
| 1087 | sop->so_id = current_ownerid++; |
| 1088 | sop->so_client = clp; |
| 1089 | sop->so_seqid = open->op_seqid; |
| 1090 | sop->so_confirmed = 0; |
| 1091 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 1092 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | rp->rp_buflen = 0; |
| 1094 | rp->rp_buf = rp->rp_ibuf; |
| 1095 | return sop; |
| 1096 | } |
| 1097 | |
| 1098 | static void |
| 1099 | release_stateid_lockowners(struct nfs4_stateid *open_stp) |
| 1100 | { |
| 1101 | struct nfs4_stateowner *lock_sop; |
| 1102 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1103 | while (!list_empty(&open_stp->st_lockowners)) { |
| 1104 | lock_sop = list_entry(open_stp->st_lockowners.next, |
| 1105 | struct nfs4_stateowner, so_perstateid); |
| 1106 | /* list_del(&open_stp->st_lockowners); */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | BUG_ON(lock_sop->so_is_open_owner); |
| 1108 | release_stateowner(lock_sop); |
| 1109 | } |
| 1110 | } |
| 1111 | |
| 1112 | static void |
| 1113 | unhash_stateowner(struct nfs4_stateowner *sop) |
| 1114 | { |
| 1115 | struct nfs4_stateid *stp; |
| 1116 | |
| 1117 | list_del(&sop->so_idhash); |
| 1118 | list_del(&sop->so_strhash); |
NeilBrown | 6fa305d | 2005-06-23 22:03:06 -0700 | [diff] [blame] | 1119 | if (sop->so_is_open_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1120 | list_del(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1121 | list_del(&sop->so_perstateid); |
| 1122 | while (!list_empty(&sop->so_stateids)) { |
| 1123 | stp = list_entry(sop->so_stateids.next, |
| 1124 | struct nfs4_stateid, st_perstateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1125 | if (sop->so_is_open_owner) |
| 1126 | release_stateid(stp, OPEN_STATE); |
| 1127 | else |
| 1128 | release_stateid(stp, LOCK_STATE); |
| 1129 | } |
| 1130 | } |
| 1131 | |
| 1132 | static void |
| 1133 | release_stateowner(struct nfs4_stateowner *sop) |
| 1134 | { |
| 1135 | unhash_stateowner(sop); |
| 1136 | list_del(&sop->so_close_lru); |
| 1137 | nfs4_put_stateowner(sop); |
| 1138 | } |
| 1139 | |
| 1140 | static inline void |
| 1141 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1142 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1143 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1144 | |
| 1145 | INIT_LIST_HEAD(&stp->st_hash); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1146 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 1147 | INIT_LIST_HEAD(&stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1149 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1150 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1151 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1152 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1153 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | stp->st_file = fp; |
| 1155 | stp->st_stateid.si_boot = boot_time; |
| 1156 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1157 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1158 | stp->st_stateid.si_generation = 0; |
| 1159 | stp->st_access_bmap = 0; |
| 1160 | stp->st_deny_bmap = 0; |
| 1161 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1162 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 1163 | stp->st_openstp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | } |
| 1165 | |
| 1166 | static void |
| 1167 | release_stateid(struct nfs4_stateid *stp, int flags) |
| 1168 | { |
| 1169 | struct file *filp = stp->st_vfs_file; |
| 1170 | |
| 1171 | list_del(&stp->st_hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | list_del(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1173 | list_del(&stp->st_perstateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | if (flags & OPEN_STATE) { |
| 1175 | release_stateid_lockowners(stp); |
| 1176 | stp->st_vfs_file = NULL; |
| 1177 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | } else if (flags & LOCK_STATE) |
| 1179 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1180 | put_nfs4_file(stp->st_file); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1181 | kmem_cache_free(stateid_slab, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | } |
| 1183 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1184 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1186 | { |
| 1187 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1188 | |
| 1189 | unhash_stateowner(sop); |
| 1190 | list_add_tail(&sop->so_close_lru, &close_lru); |
| 1191 | sop->so_time = get_seconds(); |
| 1192 | } |
| 1193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | static int |
| 1195 | cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { |
| 1196 | return ((sop->so_owner.len == owner->len) && |
| 1197 | !memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1198 | (sop->so_client->cl_clientid.cl_id == clid->cl_id)); |
| 1199 | } |
| 1200 | |
| 1201 | static struct nfs4_stateowner * |
| 1202 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1203 | { |
| 1204 | struct nfs4_stateowner *so = NULL; |
| 1205 | |
| 1206 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
| 1207 | if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) |
| 1208 | return so; |
| 1209 | } |
| 1210 | return NULL; |
| 1211 | } |
| 1212 | |
| 1213 | /* search file_hashtbl[] for file */ |
| 1214 | static struct nfs4_file * |
| 1215 | find_file(struct inode *ino) |
| 1216 | { |
| 1217 | unsigned int hashval = file_hashval(ino); |
| 1218 | struct nfs4_file *fp; |
| 1219 | |
| 1220 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1221 | if (fp->fi_inode == ino) { |
| 1222 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1223 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1224 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | } |
| 1226 | return NULL; |
| 1227 | } |
| 1228 | |
| 1229 | #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) |
| 1230 | #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) |
| 1231 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1232 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | set_access(unsigned int *access, unsigned long bmap) { |
| 1234 | int i; |
| 1235 | |
| 1236 | *access = 0; |
| 1237 | for (i = 1; i < 4; i++) { |
| 1238 | if (test_bit(i, &bmap)) |
| 1239 | *access |= i; |
| 1240 | } |
| 1241 | } |
| 1242 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1243 | static void |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1245 | int i; |
| 1246 | |
| 1247 | *deny = 0; |
| 1248 | for (i = 0; i < 4; i++) { |
| 1249 | if (test_bit(i, &bmap)) |
| 1250 | *deny |= i ; |
| 1251 | } |
| 1252 | } |
| 1253 | |
| 1254 | static int |
| 1255 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1256 | unsigned int access, deny; |
| 1257 | |
| 1258 | set_access(&access, stp->st_access_bmap); |
| 1259 | set_deny(&deny, stp->st_deny_bmap); |
| 1260 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1261 | return 0; |
| 1262 | return 1; |
| 1263 | } |
| 1264 | |
| 1265 | /* |
| 1266 | * Called to check deny when READ with all zero stateid or |
| 1267 | * WRITE with all zero or all one stateid |
| 1268 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1269 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1271 | { |
| 1272 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1273 | struct nfs4_file *fp; |
| 1274 | struct nfs4_stateid *stp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1275 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
| 1277 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 1278 | |
| 1279 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1280 | if (!fp) |
| 1281 | return nfs_ok; |
NeilBrown | b700949 | 2005-07-07 17:59:23 -0700 | [diff] [blame] | 1282 | ret = nfserr_locked; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1284 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 1285 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 1286 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 1287 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1289 | ret = nfs_ok; |
| 1290 | out: |
| 1291 | put_nfs4_file(fp); |
| 1292 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1293 | } |
| 1294 | |
| 1295 | static inline void |
| 1296 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 1297 | { |
| 1298 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
| 1299 | put_write_access(filp->f_dentry->d_inode); |
| 1300 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | /* |
| 1305 | * Recall a delegation |
| 1306 | */ |
| 1307 | static int |
| 1308 | do_recall(void *__dp) |
| 1309 | { |
| 1310 | struct nfs4_delegation *dp = __dp; |
| 1311 | |
| 1312 | daemonize("nfsv4-recall"); |
| 1313 | |
| 1314 | nfsd4_cb_recall(dp); |
| 1315 | return 0; |
| 1316 | } |
| 1317 | |
| 1318 | /* |
| 1319 | * Spawn a thread to perform a recall on the delegation represented |
| 1320 | * by the lease (file_lock) |
| 1321 | * |
| 1322 | * Called from break_lease() with lock_kernel() held. |
| 1323 | * Note: we assume break_lease will only call this *once* for any given |
| 1324 | * lease. |
| 1325 | */ |
| 1326 | static |
| 1327 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 1328 | { |
| 1329 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; |
| 1330 | struct task_struct *t; |
| 1331 | |
| 1332 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 1333 | if (!dp) |
| 1334 | return; |
| 1335 | |
| 1336 | /* We're assuming the state code never drops its reference |
| 1337 | * without first removing the lease. Since we're in this lease |
| 1338 | * callback (and since the lease code is serialized by the kernel |
| 1339 | * lock) we know the server hasn't removed the lease yet, we know |
| 1340 | * it's safe to take a reference: */ |
| 1341 | atomic_inc(&dp->dl_count); |
| 1342 | |
| 1343 | spin_lock(&recall_lock); |
| 1344 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 1345 | spin_unlock(&recall_lock); |
| 1346 | |
| 1347 | /* only place dl_time is set. protected by lock_kernel*/ |
| 1348 | dp->dl_time = get_seconds(); |
| 1349 | |
| 1350 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ |
| 1351 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; |
| 1352 | |
| 1353 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); |
| 1354 | if (IS_ERR(t)) { |
| 1355 | struct nfs4_client *clp = dp->dl_client; |
| 1356 | |
| 1357 | printk(KERN_INFO "NFSD: Callback thread failed for " |
| 1358 | "for client (clientid %08x/%08x)\n", |
| 1359 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1360 | nfs4_put_delegation(dp); |
| 1361 | } |
| 1362 | } |
| 1363 | |
| 1364 | /* |
| 1365 | * The file_lock is being reapd. |
| 1366 | * |
| 1367 | * Called by locks_free_lock() with lock_kernel() held. |
| 1368 | */ |
| 1369 | static |
| 1370 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 1371 | { |
| 1372 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 1373 | |
| 1374 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 1375 | |
| 1376 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 1377 | return; |
| 1378 | dp->dl_flock = NULL; |
| 1379 | } |
| 1380 | |
| 1381 | /* |
| 1382 | * Set the delegation file_lock back pointer. |
| 1383 | * |
| 1384 | * Called from __setlease() with lock_kernel() held. |
| 1385 | */ |
| 1386 | static |
| 1387 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 1388 | { |
| 1389 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 1390 | |
| 1391 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 1392 | if (!dp) |
| 1393 | return; |
| 1394 | dp->dl_flock = new; |
| 1395 | } |
| 1396 | |
| 1397 | /* |
| 1398 | * Called from __setlease() with lock_kernel() held |
| 1399 | */ |
| 1400 | static |
| 1401 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 1402 | { |
| 1403 | struct nfs4_delegation *onlistd = |
| 1404 | (struct nfs4_delegation *)onlist->fl_owner; |
| 1405 | struct nfs4_delegation *tryd = |
| 1406 | (struct nfs4_delegation *)try->fl_owner; |
| 1407 | |
| 1408 | if (onlist->fl_lmops != try->fl_lmops) |
| 1409 | return 0; |
| 1410 | |
| 1411 | return onlistd->dl_client == tryd->dl_client; |
| 1412 | } |
| 1413 | |
| 1414 | |
| 1415 | static |
| 1416 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 1417 | { |
| 1418 | if (arg & F_UNLCK) |
| 1419 | return lease_modify(onlist, arg); |
| 1420 | else |
| 1421 | return -EAGAIN; |
| 1422 | } |
| 1423 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1424 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | .fl_break = nfsd_break_deleg_cb, |
| 1426 | .fl_release_private = nfsd_release_deleg_cb, |
| 1427 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 1428 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 1429 | .fl_change = nfsd_change_deleg_cb, |
| 1430 | }; |
| 1431 | |
| 1432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1433 | int |
| 1434 | nfsd4_process_open1(struct nfsd4_open *open) |
| 1435 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1436 | clientid_t *clientid = &open->op_clientid; |
| 1437 | struct nfs4_client *clp = NULL; |
| 1438 | unsigned int strhashval; |
| 1439 | struct nfs4_stateowner *sop = NULL; |
| 1440 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | if (!check_name(open->op_owner)) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1442 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
| 1444 | if (STALE_CLIENTID(&open->op_clientid)) |
| 1445 | return nfserr_stale_clientid; |
| 1446 | |
| 1447 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 1448 | sop = find_openstateowner_str(strhashval, open); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1449 | open->op_stateowner = sop; |
| 1450 | if (!sop) { |
| 1451 | /* Make sure the client's lease hasn't expired. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | clp = find_confirmed_client(clientid); |
| 1453 | if (clp == NULL) |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1454 | return nfserr_expired; |
| 1455 | goto renew; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | } |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1457 | if (!sop->so_confirmed) { |
| 1458 | /* Replace unconfirmed owners without checking for replay. */ |
| 1459 | clp = sop->so_client; |
| 1460 | release_stateowner(sop); |
| 1461 | open->op_stateowner = NULL; |
| 1462 | goto renew; |
| 1463 | } |
| 1464 | if (open->op_seqid == sop->so_seqid - 1) { |
| 1465 | if (sop->so_replay.rp_buflen) |
| 1466 | return NFSERR_REPLAY_ME; |
| 1467 | /* The original OPEN failed so spectacularly |
| 1468 | * that we don't even have replay data saved! |
| 1469 | * Therefore, we have no choice but to continue |
| 1470 | * processing this OPEN; presumably, we'll |
| 1471 | * fail again for the same reason. |
| 1472 | */ |
| 1473 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); |
| 1474 | goto renew; |
| 1475 | } |
| 1476 | if (open->op_seqid != sop->so_seqid) |
| 1477 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | renew: |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1479 | if (open->op_stateowner == NULL) { |
| 1480 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 1481 | if (sop == NULL) |
| 1482 | return nfserr_resource; |
| 1483 | open->op_stateowner = sop; |
| 1484 | } |
| 1485 | list_del_init(&sop->so_close_lru); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1486 | renew_client(sop->so_client); |
J. Bruce Fields | 0f442aa | 2006-01-18 17:43:34 -0800 | [diff] [blame] | 1487 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1488 | } |
| 1489 | |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 1490 | static inline int |
| 1491 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 1492 | { |
| 1493 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 1494 | return nfserr_openmode; |
| 1495 | else |
| 1496 | return nfs_ok; |
| 1497 | } |
| 1498 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1499 | static struct nfs4_delegation * |
| 1500 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 1501 | { |
| 1502 | struct nfs4_delegation *dp; |
| 1503 | |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1504 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1505 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 1506 | return dp; |
| 1507 | } |
| 1508 | return NULL; |
| 1509 | } |
| 1510 | |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1511 | static int |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1512 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 1513 | struct nfs4_delegation **dp) |
| 1514 | { |
| 1515 | int flags; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1516 | int status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1517 | |
| 1518 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 1519 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1520 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1521 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 1522 | RD_STATE : WR_STATE; |
| 1523 | status = nfs4_check_delegmode(*dp, flags); |
| 1524 | if (status) |
| 1525 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1526 | out: |
| 1527 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1528 | return nfs_ok; |
| 1529 | if (status) |
| 1530 | return status; |
| 1531 | open->op_stateowner->so_confirmed = 1; |
| 1532 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1533 | } |
| 1534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | static int |
| 1536 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 1537 | { |
| 1538 | struct nfs4_stateid *local; |
| 1539 | int status = nfserr_share_denied; |
| 1540 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1541 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1542 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1543 | /* ignore lock owners */ |
| 1544 | if (local->st_stateowner->so_is_open_owner == 0) |
| 1545 | continue; |
| 1546 | /* remember if we have seen this open owner */ |
| 1547 | if (local->st_stateowner == sop) |
| 1548 | *stpp = local; |
| 1549 | /* check for conflicting share reservations */ |
| 1550 | if (!test_share(local, open)) |
| 1551 | goto out; |
| 1552 | } |
| 1553 | status = 0; |
| 1554 | out: |
| 1555 | return status; |
| 1556 | } |
| 1557 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1558 | static inline struct nfs4_stateid * |
| 1559 | nfs4_alloc_stateid(void) |
| 1560 | { |
| 1561 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 1562 | } |
| 1563 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1564 | static int |
| 1565 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1566 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | struct svc_fh *cur_fh, int flags) |
| 1568 | { |
| 1569 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1570 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1571 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1572 | if (stp == NULL) |
| 1573 | return nfserr_resource; |
| 1574 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1575 | if (dp) { |
| 1576 | get_file(dp->dl_vfs_file); |
| 1577 | stp->st_vfs_file = dp->dl_vfs_file; |
| 1578 | } else { |
| 1579 | int status; |
| 1580 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 1581 | &stp->st_vfs_file); |
| 1582 | if (status) { |
| 1583 | if (status == nfserr_dropit) |
| 1584 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1585 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1586 | return status; |
| 1587 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1589 | *stpp = stp; |
| 1590 | return 0; |
| 1591 | } |
| 1592 | |
| 1593 | static inline int |
| 1594 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 1595 | struct nfsd4_open *open) |
| 1596 | { |
| 1597 | struct iattr iattr = { |
| 1598 | .ia_valid = ATTR_SIZE, |
| 1599 | .ia_size = 0, |
| 1600 | }; |
| 1601 | if (!open->op_truncate) |
| 1602 | return 0; |
| 1603 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
Al Viro | 9246585 | 2006-01-18 17:43:46 -0800 | [diff] [blame] | 1604 | return nfserr_inval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 1606 | } |
| 1607 | |
| 1608 | static int |
| 1609 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 1610 | { |
| 1611 | struct file *filp = stp->st_vfs_file; |
| 1612 | struct inode *inode = filp->f_dentry->d_inode; |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1613 | unsigned int share_access, new_writer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | int status; |
| 1615 | |
| 1616 | set_access(&share_access, stp->st_access_bmap); |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1617 | new_writer = (~share_access) & open->op_share_access |
| 1618 | & NFS4_SHARE_ACCESS_WRITE; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1619 | |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1620 | if (new_writer) { |
| 1621 | status = get_write_access(inode); |
| 1622 | if (status) |
| 1623 | return nfserrno(status); |
| 1624 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 1626 | if (status) { |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1627 | if (new_writer) |
| 1628 | put_write_access(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | return status; |
| 1630 | } |
| 1631 | /* remember the open */ |
J. Bruce Fields | 6c26d08 | 2006-01-18 17:43:38 -0800 | [diff] [blame] | 1632 | filp->f_mode |= open->op_share_access; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1634 | set_bit(open->op_share_deny, &stp->st_deny_bmap); |
| 1635 | |
| 1636 | return nfs_ok; |
| 1637 | } |
| 1638 | |
| 1639 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1640 | static void |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1641 | nfs4_set_claim_prev(struct nfsd4_open *open) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1642 | { |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1643 | open->op_stateowner->so_confirmed = 1; |
| 1644 | open->op_stateowner->so_client->cl_firststate = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1645 | } |
| 1646 | |
| 1647 | /* |
| 1648 | * Attempt to hand out a delegation. |
| 1649 | */ |
| 1650 | static void |
| 1651 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 1652 | { |
| 1653 | struct nfs4_delegation *dp; |
| 1654 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 1655 | struct nfs4_callback *cb = &sop->so_client->cl_callback; |
| 1656 | struct file_lock fl, *flp = &fl; |
| 1657 | int status, flag = 0; |
| 1658 | |
| 1659 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1660 | open->op_recall = 0; |
| 1661 | switch (open->op_claim_type) { |
| 1662 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 1663 | if (!atomic_read(&cb->cb_set)) |
| 1664 | open->op_recall = 1; |
| 1665 | flag = open->op_delegate_type; |
| 1666 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 1667 | goto out; |
| 1668 | break; |
| 1669 | case NFS4_OPEN_CLAIM_NULL: |
| 1670 | /* Let's not give out any delegations till everyone's |
| 1671 | * had the chance to reclaim theirs.... */ |
| 1672 | if (nfs4_in_grace()) |
| 1673 | goto out; |
| 1674 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) |
| 1675 | goto out; |
| 1676 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1677 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 1678 | else |
| 1679 | flag = NFS4_OPEN_DELEGATE_READ; |
| 1680 | break; |
| 1681 | default: |
| 1682 | goto out; |
| 1683 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | |
| 1685 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 1686 | if (dp == NULL) { |
| 1687 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1688 | goto out; |
| 1689 | } |
| 1690 | locks_init_lock(&fl); |
| 1691 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 1692 | fl.fl_flags = FL_LEASE; |
| 1693 | fl.fl_end = OFFSET_MAX; |
| 1694 | fl.fl_owner = (fl_owner_t)dp; |
| 1695 | fl.fl_file = stp->st_vfs_file; |
| 1696 | fl.fl_pid = current->tgid; |
| 1697 | |
| 1698 | /* setlease checks to see if delegation should be handed out. |
| 1699 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 1700 | */ |
| 1701 | if ((status = setlease(stp->st_vfs_file, |
| 1702 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { |
| 1703 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 1704 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1706 | goto out; |
| 1707 | } |
| 1708 | |
| 1709 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 1710 | |
| 1711 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", |
| 1712 | dp->dl_stateid.si_boot, |
| 1713 | dp->dl_stateid.si_stateownerid, |
| 1714 | dp->dl_stateid.si_fileid, |
| 1715 | dp->dl_stateid.si_generation); |
| 1716 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1717 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 1718 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 1719 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
| 1720 | printk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1721 | open->op_delegate_type = flag; |
| 1722 | } |
| 1723 | |
| 1724 | /* |
| 1725 | * called with nfs4_lock_state() held. |
| 1726 | */ |
| 1727 | int |
| 1728 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 1729 | { |
| 1730 | struct nfs4_file *fp = NULL; |
| 1731 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1732 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1733 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1734 | int status; |
| 1735 | |
| 1736 | status = nfserr_inval; |
| 1737 | if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) |
| 1738 | goto out; |
| 1739 | /* |
| 1740 | * Lookup file; if found, lookup stateid and check open request, |
| 1741 | * and check for delegations in the process of being recalled. |
| 1742 | * If not found, create the nfs4_file struct |
| 1743 | */ |
| 1744 | fp = find_file(ino); |
| 1745 | if (fp) { |
| 1746 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 1747 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1748 | status = nfs4_check_deleg(fp, open, &dp); |
| 1749 | if (status) |
| 1750 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1752 | status = nfserr_bad_stateid; |
| 1753 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1754 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1755 | status = nfserr_resource; |
| 1756 | fp = alloc_init_file(ino); |
| 1757 | if (fp == NULL) |
| 1758 | goto out; |
| 1759 | } |
| 1760 | |
| 1761 | /* |
| 1762 | * OPEN the file, or upgrade an existing OPEN. |
| 1763 | * If truncate fails, the OPEN fails. |
| 1764 | */ |
| 1765 | if (stp) { |
| 1766 | /* Stateid was found, this is an OPEN upgrade */ |
| 1767 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 1768 | if (status) |
| 1769 | goto out; |
NeilBrown | 444c2c0 | 2005-07-07 17:59:22 -0700 | [diff] [blame] | 1770 | update_stateid(&stp->st_stateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1771 | } else { |
| 1772 | /* Stateid was not found, this is a new OPEN */ |
| 1773 | int flags = 0; |
| 1774 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1775 | flags = MAY_WRITE; |
| 1776 | else |
| 1777 | flags = MAY_READ; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1778 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 1779 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | goto out; |
| 1781 | init_stateid(stp, fp, open); |
| 1782 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 1783 | if (status) { |
| 1784 | release_stateid(stp, OPEN_STATE); |
| 1785 | goto out; |
| 1786 | } |
| 1787 | } |
| 1788 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 1789 | |
| 1790 | /* |
| 1791 | * Attempt to hand out a delegation. No error return, because the |
| 1792 | * OPEN succeeds even if we fail. |
| 1793 | */ |
| 1794 | nfs4_open_delegation(current_fh, open, stp); |
| 1795 | |
| 1796 | status = nfs_ok; |
| 1797 | |
| 1798 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", |
| 1799 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, |
| 1800 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); |
| 1801 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1802 | if (fp) |
| 1803 | put_nfs4_file(fp); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 1804 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 1805 | nfs4_set_claim_prev(open); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1806 | /* |
| 1807 | * To finish the open response, we just need to set the rflags. |
| 1808 | */ |
| 1809 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
| 1810 | if (!open->op_stateowner->so_confirmed) |
| 1811 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 1812 | |
| 1813 | return status; |
| 1814 | } |
| 1815 | |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1816 | static struct workqueue_struct *laundry_wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1817 | static struct work_struct laundromat_work; |
| 1818 | static void laundromat_main(void *); |
| 1819 | static DECLARE_WORK(laundromat_work, laundromat_main, NULL); |
| 1820 | |
| 1821 | int |
| 1822 | nfsd4_renew(clientid_t *clid) |
| 1823 | { |
| 1824 | struct nfs4_client *clp; |
| 1825 | int status; |
| 1826 | |
| 1827 | nfs4_lock_state(); |
| 1828 | dprintk("process_renew(%08x/%08x): starting\n", |
| 1829 | clid->cl_boot, clid->cl_id); |
| 1830 | status = nfserr_stale_clientid; |
| 1831 | if (STALE_CLIENTID(clid)) |
| 1832 | goto out; |
| 1833 | clp = find_confirmed_client(clid); |
| 1834 | status = nfserr_expired; |
| 1835 | if (clp == NULL) { |
| 1836 | /* We assume the client took too long to RENEW. */ |
| 1837 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 1838 | goto out; |
| 1839 | } |
| 1840 | renew_client(clp); |
| 1841 | status = nfserr_cb_path_down; |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 1842 | if (!list_empty(&clp->cl_delegations) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | && !atomic_read(&clp->cl_callback.cb_set)) |
| 1844 | goto out; |
| 1845 | status = nfs_ok; |
| 1846 | out: |
| 1847 | nfs4_unlock_state(); |
| 1848 | return status; |
| 1849 | } |
| 1850 | |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1851 | static void |
| 1852 | end_grace(void) |
| 1853 | { |
| 1854 | dprintk("NFSD: end of grace period\n"); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1855 | nfsd4_recdir_purge_old(); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1856 | in_grace = 0; |
| 1857 | } |
| 1858 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1859 | static time_t |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1860 | nfs4_laundromat(void) |
| 1861 | { |
| 1862 | struct nfs4_client *clp; |
| 1863 | struct nfs4_stateowner *sop; |
| 1864 | struct nfs4_delegation *dp; |
| 1865 | struct list_head *pos, *next, reaplist; |
| 1866 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; |
| 1867 | time_t t, clientid_val = NFSD_LEASE_TIME; |
| 1868 | time_t u, test_val = NFSD_LEASE_TIME; |
| 1869 | |
| 1870 | nfs4_lock_state(); |
| 1871 | |
| 1872 | dprintk("NFSD: laundromat service - starting\n"); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 1873 | if (in_grace) |
| 1874 | end_grace(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1875 | list_for_each_safe(pos, next, &client_lru) { |
| 1876 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 1877 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 1878 | t = clp->cl_time - cutoff; |
| 1879 | if (clientid_val > t) |
| 1880 | clientid_val = t; |
| 1881 | break; |
| 1882 | } |
| 1883 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 1884 | clp->cl_clientid.cl_id); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 1885 | nfsd4_remove_clid_dir(clp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1886 | expire_client(clp); |
| 1887 | } |
| 1888 | INIT_LIST_HEAD(&reaplist); |
| 1889 | spin_lock(&recall_lock); |
| 1890 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 1891 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1892 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 1893 | u = dp->dl_time - cutoff; |
| 1894 | if (test_val > u) |
| 1895 | test_val = u; |
| 1896 | break; |
| 1897 | } |
| 1898 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 1899 | dp, dp->dl_flock); |
| 1900 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1901 | } |
| 1902 | spin_unlock(&recall_lock); |
| 1903 | list_for_each_safe(pos, next, &reaplist) { |
| 1904 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1905 | list_del_init(&dp->dl_recall_lru); |
| 1906 | unhash_delegation(dp); |
| 1907 | } |
| 1908 | test_val = NFSD_LEASE_TIME; |
| 1909 | list_for_each_safe(pos, next, &close_lru) { |
| 1910 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 1911 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 1912 | u = sop->so_time - cutoff; |
| 1913 | if (test_val > u) |
| 1914 | test_val = u; |
| 1915 | break; |
| 1916 | } |
| 1917 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 1918 | sop->so_id); |
| 1919 | list_del(&sop->so_close_lru); |
| 1920 | nfs4_put_stateowner(sop); |
| 1921 | } |
| 1922 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 1923 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 1924 | nfs4_unlock_state(); |
| 1925 | return clientid_val; |
| 1926 | } |
| 1927 | |
| 1928 | void |
| 1929 | laundromat_main(void *not_used) |
| 1930 | { |
| 1931 | time_t t; |
| 1932 | |
| 1933 | t = nfs4_laundromat(); |
| 1934 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1935 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | } |
| 1937 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 1938 | static struct nfs4_stateowner * |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 1939 | search_close_lru(u32 st_id, int flags) |
| 1940 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1941 | struct nfs4_stateowner *local = NULL; |
| 1942 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1943 | if (flags & CLOSE_STATE) { |
| 1944 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 1945 | if (local->so_id == st_id) |
| 1946 | return local; |
| 1947 | } |
| 1948 | } |
| 1949 | return NULL; |
| 1950 | } |
| 1951 | |
| 1952 | static inline int |
| 1953 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 1954 | { |
| 1955 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; |
| 1956 | } |
| 1957 | |
| 1958 | static int |
| 1959 | STALE_STATEID(stateid_t *stateid) |
| 1960 | { |
| 1961 | if (stateid->si_boot == boot_time) |
| 1962 | return 0; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 1963 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 1965 | stateid->si_generation); |
| 1966 | return 1; |
| 1967 | } |
| 1968 | |
| 1969 | static inline int |
| 1970 | access_permit_read(unsigned long access_bmap) |
| 1971 | { |
| 1972 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 1973 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 1974 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 1975 | } |
| 1976 | |
| 1977 | static inline int |
| 1978 | access_permit_write(unsigned long access_bmap) |
| 1979 | { |
| 1980 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 1981 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 1982 | } |
| 1983 | |
| 1984 | static |
| 1985 | int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
| 1986 | { |
| 1987 | int status = nfserr_openmode; |
| 1988 | |
| 1989 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 1990 | goto out; |
| 1991 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 1992 | goto out; |
| 1993 | status = nfs_ok; |
| 1994 | out: |
| 1995 | return status; |
| 1996 | } |
| 1997 | |
| 1998 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2000 | { |
| 2001 | /* Trying to call delegreturn with a special stateid? Yuch: */ |
| 2002 | if (!(flags & (RD_STATE | WR_STATE))) |
| 2003 | return nfserr_bad_stateid; |
| 2004 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
| 2005 | return nfs_ok; |
| 2006 | else if (nfs4_in_grace()) { |
| 2007 | /* Answer in remaining cases depends on existance of |
| 2008 | * conflicting state; so we must wait out the grace period. */ |
| 2009 | return nfserr_grace; |
| 2010 | } else if (flags & WR_STATE) |
| 2011 | return nfs4_share_conflict(current_fh, |
| 2012 | NFS4_SHARE_DENY_WRITE); |
| 2013 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2014 | return nfs4_share_conflict(current_fh, |
| 2015 | NFS4_SHARE_DENY_READ); |
| 2016 | } |
| 2017 | |
| 2018 | /* |
| 2019 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2020 | * that are not able to provide mandatory locking. |
| 2021 | */ |
| 2022 | static inline int |
| 2023 | io_during_grace_disallowed(struct inode *inode, int flags) |
| 2024 | { |
| 2025 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) |
| 2026 | && MANDATORY_LOCK(inode); |
| 2027 | } |
| 2028 | |
| 2029 | /* |
| 2030 | * Checks for stateid operations |
| 2031 | */ |
| 2032 | int |
| 2033 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
| 2034 | { |
| 2035 | struct nfs4_stateid *stp = NULL; |
| 2036 | struct nfs4_delegation *dp = NULL; |
| 2037 | stateid_t *stidp; |
| 2038 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2039 | int status; |
| 2040 | |
| 2041 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", |
| 2042 | stateid->si_boot, stateid->si_stateownerid, |
| 2043 | stateid->si_fileid, stateid->si_generation); |
| 2044 | if (filpp) |
| 2045 | *filpp = NULL; |
| 2046 | |
| 2047 | if (io_during_grace_disallowed(ino, flags)) |
| 2048 | return nfserr_grace; |
| 2049 | |
| 2050 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2051 | return check_special_stateids(current_fh, stateid, flags); |
| 2052 | |
| 2053 | /* STALE STATEID */ |
| 2054 | status = nfserr_stale_stateid; |
| 2055 | if (STALE_STATEID(stateid)) |
| 2056 | goto out; |
| 2057 | |
| 2058 | /* BAD STATEID */ |
| 2059 | status = nfserr_bad_stateid; |
| 2060 | if (!stateid->si_fileid) { /* delegation stateid */ |
| 2061 | if(!(dp = find_delegation_stateid(ino, stateid))) { |
| 2062 | dprintk("NFSD: delegation stateid not found\n"); |
| 2063 | if (nfs4_in_grace()) |
| 2064 | status = nfserr_grace; |
| 2065 | goto out; |
| 2066 | } |
| 2067 | stidp = &dp->dl_stateid; |
| 2068 | } else { /* open or lock stateid */ |
| 2069 | if (!(stp = find_stateid(stateid, flags))) { |
| 2070 | dprintk("NFSD: open or lock stateid not found\n"); |
| 2071 | if (nfs4_in_grace()) |
| 2072 | status = nfserr_grace; |
| 2073 | goto out; |
| 2074 | } |
| 2075 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) |
| 2076 | goto out; |
| 2077 | if (!stp->st_stateowner->so_confirmed) |
| 2078 | goto out; |
| 2079 | stidp = &stp->st_stateid; |
| 2080 | } |
| 2081 | if (stateid->si_generation > stidp->si_generation) |
| 2082 | goto out; |
| 2083 | |
| 2084 | /* OLD STATEID */ |
| 2085 | status = nfserr_old_stateid; |
| 2086 | if (stateid->si_generation < stidp->si_generation) |
| 2087 | goto out; |
| 2088 | if (stp) { |
| 2089 | if ((status = nfs4_check_openmode(stp,flags))) |
| 2090 | goto out; |
| 2091 | renew_client(stp->st_stateowner->so_client); |
| 2092 | if (filpp) |
| 2093 | *filpp = stp->st_vfs_file; |
| 2094 | } else if (dp) { |
| 2095 | if ((status = nfs4_check_delegmode(dp, flags))) |
| 2096 | goto out; |
| 2097 | renew_client(dp->dl_client); |
| 2098 | if (flags & DELEG_RET) |
| 2099 | unhash_delegation(dp); |
| 2100 | if (filpp) |
| 2101 | *filpp = dp->dl_vfs_file; |
| 2102 | } |
| 2103 | status = nfs_ok; |
| 2104 | out: |
| 2105 | return status; |
| 2106 | } |
| 2107 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2108 | static inline int |
| 2109 | setlkflg (int type) |
| 2110 | { |
| 2111 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? |
| 2112 | RD_STATE : WR_STATE; |
| 2113 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2114 | |
| 2115 | /* |
| 2116 | * Checks for sequence id mutating operations. |
| 2117 | */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2118 | static int |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2119 | 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) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2120 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2121 | struct nfs4_stateid *stp; |
| 2122 | struct nfs4_stateowner *sop; |
| 2123 | |
| 2124 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " |
| 2125 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, |
| 2126 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 2127 | stateid->si_generation); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2128 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | *stpp = NULL; |
| 2130 | *sopp = NULL; |
| 2131 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2132 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
| 2133 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2134 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2135 | } |
| 2136 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2137 | if (STALE_STATEID(stateid)) |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2138 | return nfserr_stale_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2139 | /* |
| 2140 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2141 | * the confirmed flag is incorrecly set, or the generation |
| 2142 | * number is incorrect. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2143 | */ |
NeilBrown | f881651 | 2005-07-07 17:59:25 -0700 | [diff] [blame] | 2144 | stp = find_stateid(stateid, flags); |
| 2145 | if (stp == NULL) { |
| 2146 | /* |
| 2147 | * Also, we should make sure this isn't just the result of |
| 2148 | * a replayed close: |
| 2149 | */ |
| 2150 | sop = search_close_lru(stateid->si_stateownerid, flags); |
| 2151 | if (sop == NULL) |
| 2152 | return nfserr_bad_stateid; |
| 2153 | *sopp = sop; |
| 2154 | goto check_replay; |
| 2155 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2156 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2157 | if (lock) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2158 | struct nfs4_stateowner *sop = stp->st_stateowner; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2159 | clientid_t *lockclid = &lock->v.new.clientid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2160 | struct nfs4_client *clp = sop->so_client; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2161 | int lkflg = 0; |
| 2162 | int status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2164 | lkflg = setlkflg(lock->lk_type); |
| 2165 | |
| 2166 | if (lock->lk_is_new) { |
| 2167 | if (!sop->so_is_open_owner) |
| 2168 | return nfserr_bad_stateid; |
| 2169 | if (!cmp_clid(&clp->cl_clientid, lockclid)) |
| 2170 | return nfserr_bad_stateid; |
| 2171 | /* stp is the open stateid */ |
| 2172 | status = nfs4_check_openmode(stp, lkflg); |
| 2173 | if (status) |
| 2174 | return status; |
| 2175 | } else { |
| 2176 | /* stp is the lock stateid */ |
| 2177 | status = nfs4_check_openmode(stp->st_openstp, lkflg); |
| 2178 | if (status) |
| 2179 | return status; |
| 2180 | } |
| 2181 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | } |
| 2183 | |
| 2184 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { |
| 2185 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2186 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2187 | } |
| 2188 | |
| 2189 | *stpp = stp; |
| 2190 | *sopp = sop = stp->st_stateowner; |
| 2191 | |
| 2192 | /* |
| 2193 | * We now validate the seqid and stateid generation numbers. |
| 2194 | * For the moment, we ignore the possibility of |
| 2195 | * generation number wraparound. |
| 2196 | */ |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2197 | if (seqid != sop->so_seqid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2198 | goto check_replay; |
| 2199 | |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2200 | if (sop->so_confirmed && flags & CONFIRM) { |
| 2201 | printk("NFSD: preprocess_seqid_op: expected" |
| 2202 | " unconfirmed stateowner!\n"); |
| 2203 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2204 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2205 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
| 2206 | printk("NFSD: preprocess_seqid_op: stateowner not" |
| 2207 | " confirmed yet!\n"); |
| 2208 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2209 | } |
| 2210 | if (stateid->si_generation > stp->st_stateid.si_generation) { |
| 2211 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2212 | return nfserr_bad_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2213 | } |
| 2214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2215 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
| 2216 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2217 | return nfserr_old_stateid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2218 | } |
NeilBrown | 52fd004 | 2005-07-07 17:59:24 -0700 | [diff] [blame] | 2219 | renew_client(sop->so_client); |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2220 | return nfs_ok; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | check_replay: |
NeilBrown | bd9aac5 | 2005-07-07 17:59:19 -0700 | [diff] [blame] | 2223 | if (seqid == sop->so_seqid - 1) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2224 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | /* indicate replay to calling function */ |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2226 | return NFSERR_REPLAY_ME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2227 | } |
NeilBrown | 3a4f98b | 2005-07-07 17:59:26 -0700 | [diff] [blame] | 2228 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
| 2229 | sop->so_seqid, seqid); |
| 2230 | *sopp = NULL; |
| 2231 | return nfserr_bad_seqid; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2232 | } |
| 2233 | |
| 2234 | int |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2235 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc, struct nfs4_stateowner **replay_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2236 | { |
| 2237 | int status; |
| 2238 | struct nfs4_stateowner *sop; |
| 2239 | struct nfs4_stateid *stp; |
| 2240 | |
| 2241 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
| 2242 | (int)current_fh->fh_dentry->d_name.len, |
| 2243 | current_fh->fh_dentry->d_name.name); |
| 2244 | |
| 2245 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) |
| 2246 | goto out; |
| 2247 | |
| 2248 | nfs4_lock_state(); |
| 2249 | |
| 2250 | if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, |
| 2251 | &oc->oc_req_stateid, |
| 2252 | CHECK_FH | CONFIRM | OPEN_STATE, |
| 2253 | &oc->oc_stateowner, &stp, NULL))) |
| 2254 | goto out; |
| 2255 | |
| 2256 | sop = oc->oc_stateowner; |
| 2257 | sop->so_confirmed = 1; |
| 2258 | update_stateid(&stp->st_stateid); |
| 2259 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2260 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " |
| 2261 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, |
| 2262 | stp->st_stateid.si_boot, |
| 2263 | stp->st_stateid.si_stateownerid, |
| 2264 | stp->st_stateid.si_fileid, |
| 2265 | stp->st_stateid.si_generation); |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 2266 | |
| 2267 | nfsd4_create_clid_dir(sop->so_client); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2268 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2269 | if (oc->oc_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2270 | nfs4_get_stateowner(oc->oc_stateowner); |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2271 | *replay_owner = oc->oc_stateowner; |
| 2272 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2273 | nfs4_unlock_state(); |
| 2274 | return status; |
| 2275 | } |
| 2276 | |
| 2277 | |
| 2278 | /* |
| 2279 | * unset all bits in union bitmap (bmap) that |
| 2280 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 2281 | */ |
| 2282 | static void |
| 2283 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 2284 | { |
| 2285 | int i; |
| 2286 | for (i = 1; i < 4; i++) { |
| 2287 | if ((i & access) != i) |
| 2288 | __clear_bit(i, bmap); |
| 2289 | } |
| 2290 | } |
| 2291 | |
| 2292 | static void |
| 2293 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 2294 | { |
| 2295 | int i; |
| 2296 | for (i = 0; i < 4; i++) { |
| 2297 | if ((i & deny) != i) |
| 2298 | __clear_bit(i, bmap); |
| 2299 | } |
| 2300 | } |
| 2301 | |
| 2302 | int |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2303 | nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od, struct nfs4_stateowner **replay_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2304 | { |
| 2305 | int status; |
| 2306 | struct nfs4_stateid *stp; |
| 2307 | unsigned int share_access; |
| 2308 | |
| 2309 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
| 2310 | (int)current_fh->fh_dentry->d_name.len, |
| 2311 | current_fh->fh_dentry->d_name.name); |
| 2312 | |
| 2313 | if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) |
| 2314 | return nfserr_inval; |
| 2315 | |
| 2316 | nfs4_lock_state(); |
| 2317 | if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, |
| 2318 | &od->od_stateid, |
| 2319 | CHECK_FH | OPEN_STATE, |
| 2320 | &od->od_stateowner, &stp, NULL))) |
| 2321 | goto out; |
| 2322 | |
| 2323 | status = nfserr_inval; |
| 2324 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 2325 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 2326 | stp->st_access_bmap, od->od_share_access); |
| 2327 | goto out; |
| 2328 | } |
| 2329 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 2330 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 2331 | stp->st_deny_bmap, od->od_share_deny); |
| 2332 | goto out; |
| 2333 | } |
| 2334 | set_access(&share_access, stp->st_access_bmap); |
| 2335 | nfs4_file_downgrade(stp->st_vfs_file, |
| 2336 | share_access & ~od->od_share_access); |
| 2337 | |
| 2338 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 2339 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 2340 | |
| 2341 | update_stateid(&stp->st_stateid); |
| 2342 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2343 | status = nfs_ok; |
| 2344 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2345 | if (od->od_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2346 | nfs4_get_stateowner(od->od_stateowner); |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2347 | *replay_owner = od->od_stateowner; |
| 2348 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2349 | nfs4_unlock_state(); |
| 2350 | return status; |
| 2351 | } |
| 2352 | |
| 2353 | /* |
| 2354 | * nfs4_unlock_state() called after encode |
| 2355 | */ |
| 2356 | int |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2357 | nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close, struct nfs4_stateowner **replay_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2358 | { |
| 2359 | int status; |
| 2360 | struct nfs4_stateid *stp; |
| 2361 | |
| 2362 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
| 2363 | (int)current_fh->fh_dentry->d_name.len, |
| 2364 | current_fh->fh_dentry->d_name.name); |
| 2365 | |
| 2366 | nfs4_lock_state(); |
| 2367 | /* check close_lru for replay */ |
| 2368 | if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, |
| 2369 | &close->cl_stateid, |
| 2370 | CHECK_FH | OPEN_STATE | CLOSE_STATE, |
| 2371 | &close->cl_stateowner, &stp, NULL))) |
| 2372 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2373 | status = nfs_ok; |
| 2374 | update_stateid(&stp->st_stateid); |
| 2375 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2376 | |
J. Bruce Fields | 04ef595 | 2006-01-18 17:43:21 -0800 | [diff] [blame] | 2377 | /* release_stateid() calls nfsd_close() if needed */ |
| 2378 | release_stateid(stp, OPEN_STATE); |
| 2379 | |
| 2380 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 2381 | * released by the laundromat service after the lease period |
| 2382 | * to enable us to handle CLOSE replay |
| 2383 | */ |
| 2384 | if (list_empty(&close->cl_stateowner->so_stateids)) |
| 2385 | move_to_close_lru(close->cl_stateowner); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2386 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2387 | if (close->cl_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2388 | nfs4_get_stateowner(close->cl_stateowner); |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2389 | *replay_owner = close->cl_stateowner; |
| 2390 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2391 | nfs4_unlock_state(); |
| 2392 | return status; |
| 2393 | } |
| 2394 | |
| 2395 | int |
| 2396 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) |
| 2397 | { |
| 2398 | int status; |
| 2399 | |
| 2400 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) |
| 2401 | goto out; |
| 2402 | |
| 2403 | nfs4_lock_state(); |
| 2404 | status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); |
| 2405 | nfs4_unlock_state(); |
| 2406 | out: |
| 2407 | return status; |
| 2408 | } |
| 2409 | |
| 2410 | |
| 2411 | /* |
| 2412 | * Lock owner state (byte-range locks) |
| 2413 | */ |
| 2414 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 2415 | #define LOCK_HASH_BITS 8 |
| 2416 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 2417 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 2418 | |
| 2419 | #define lockownerid_hashval(id) \ |
| 2420 | ((id) & LOCK_HASH_MASK) |
| 2421 | |
| 2422 | static inline unsigned int |
| 2423 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 2424 | struct xdr_netobj *ownername) |
| 2425 | { |
| 2426 | return (file_hashval(inode) + cl_id |
| 2427 | + opaque_hashval(ownername->data, ownername->len)) |
| 2428 | & LOCK_HASH_MASK; |
| 2429 | } |
| 2430 | |
| 2431 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 2432 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 2433 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 2434 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2435 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2436 | find_stateid(stateid_t *stid, int flags) |
| 2437 | { |
| 2438 | struct nfs4_stateid *local = NULL; |
| 2439 | u32 st_id = stid->si_stateownerid; |
| 2440 | u32 f_id = stid->si_fileid; |
| 2441 | unsigned int hashval; |
| 2442 | |
| 2443 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
| 2444 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { |
| 2445 | hashval = stateid_hashval(st_id, f_id); |
| 2446 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 2447 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2448 | (local->st_stateid.si_fileid == f_id)) |
| 2449 | return local; |
| 2450 | } |
| 2451 | } |
| 2452 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { |
| 2453 | hashval = stateid_hashval(st_id, f_id); |
| 2454 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 2455 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2456 | (local->st_stateid.si_fileid == f_id)) |
| 2457 | return local; |
| 2458 | } |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2459 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2460 | return NULL; |
| 2461 | } |
| 2462 | |
| 2463 | static struct nfs4_delegation * |
| 2464 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 2465 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2466 | struct nfs4_file *fp; |
| 2467 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2468 | |
| 2469 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", |
| 2470 | stid->si_boot, stid->si_stateownerid, |
| 2471 | stid->si_fileid, stid->si_generation); |
| 2472 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2473 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2474 | if (!fp) |
| 2475 | return NULL; |
| 2476 | dl = find_delegation_file(fp, stid); |
| 2477 | put_nfs4_file(fp); |
| 2478 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2479 | } |
| 2480 | |
| 2481 | /* |
| 2482 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 2483 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 2484 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 2485 | * locking, this prevents us from being completely protocol-compliant. The |
| 2486 | * real solution to this problem is to start using unsigned file offsets in |
| 2487 | * the VFS, but this is a very deep change! |
| 2488 | */ |
| 2489 | static inline void |
| 2490 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 2491 | { |
| 2492 | if (lock->fl_start < 0) |
| 2493 | lock->fl_start = OFFSET_MAX; |
| 2494 | if (lock->fl_end < 0) |
| 2495 | lock->fl_end = OFFSET_MAX; |
| 2496 | } |
| 2497 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2498 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2499 | nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) |
| 2500 | { |
| 2501 | struct nfs4_stateowner *local = NULL; |
| 2502 | int status = 0; |
| 2503 | |
| 2504 | if (hashval >= LOCK_HASH_SIZE) |
| 2505 | goto out; |
| 2506 | list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) { |
| 2507 | if (local == sop) { |
| 2508 | status = 1; |
| 2509 | goto out; |
| 2510 | } |
| 2511 | } |
| 2512 | out: |
| 2513 | return status; |
| 2514 | } |
| 2515 | |
| 2516 | |
| 2517 | static inline void |
| 2518 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 2519 | { |
| 2520 | struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 2521 | unsigned int hval = lockownerid_hashval(sop->so_id); |
| 2522 | |
| 2523 | deny->ld_sop = NULL; |
| 2524 | if (nfs4_verify_lock_stateowner(sop, hval)) { |
| 2525 | kref_get(&sop->so_ref); |
| 2526 | deny->ld_sop = sop; |
| 2527 | deny->ld_clientid = sop->so_client->cl_clientid; |
| 2528 | } |
| 2529 | deny->ld_start = fl->fl_start; |
| 2530 | deny->ld_length = ~(u64)0; |
| 2531 | if (fl->fl_end != ~(u64)0) |
| 2532 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 2533 | deny->ld_type = NFS4_READ_LT; |
| 2534 | if (fl->fl_type != F_RDLCK) |
| 2535 | deny->ld_type = NFS4_WRITE_LT; |
| 2536 | } |
| 2537 | |
| 2538 | static struct nfs4_stateowner * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2539 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 2540 | struct xdr_netobj *owner) |
| 2541 | { |
| 2542 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 2543 | struct nfs4_stateowner *op; |
| 2544 | |
| 2545 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
| 2546 | if (cmp_owner_str(op, owner, clid)) |
| 2547 | return op; |
| 2548 | } |
| 2549 | return NULL; |
| 2550 | } |
| 2551 | |
| 2552 | /* |
| 2553 | * Alloc a lock owner structure. |
| 2554 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 2555 | * occured. |
| 2556 | * |
| 2557 | * strhashval = lock_ownerstr_hashval |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2558 | */ |
| 2559 | |
| 2560 | static struct nfs4_stateowner * |
| 2561 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 2562 | struct nfs4_stateowner *sop; |
| 2563 | struct nfs4_replay *rp; |
| 2564 | unsigned int idhashval; |
| 2565 | |
| 2566 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 2567 | return NULL; |
| 2568 | idhashval = lockownerid_hashval(current_ownerid); |
| 2569 | INIT_LIST_HEAD(&sop->so_idhash); |
| 2570 | INIT_LIST_HEAD(&sop->so_strhash); |
| 2571 | INIT_LIST_HEAD(&sop->so_perclient); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2572 | INIT_LIST_HEAD(&sop->so_stateids); |
| 2573 | INIT_LIST_HEAD(&sop->so_perstateid); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2574 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 2575 | sop->so_time = 0; |
| 2576 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 2577 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2578 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2579 | sop->so_is_open_owner = 0; |
| 2580 | sop->so_id = current_ownerid++; |
| 2581 | sop->so_client = clp; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2582 | /* It is the openowner seqid that will be incremented in encode in the |
| 2583 | * case of new lockowners; so increment the lock seqid manually: */ |
| 2584 | sop->so_seqid = lock->lk_new_lock_seqid + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2585 | sop->so_confirmed = 1; |
| 2586 | rp = &sop->so_replay; |
Al Viro | de1ae28 | 2006-01-18 17:43:47 -0800 | [diff] [blame] | 2587 | rp->rp_status = nfserr_serverfault; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2588 | rp->rp_buflen = 0; |
| 2589 | rp->rp_buf = rp->rp_ibuf; |
| 2590 | return sop; |
| 2591 | } |
| 2592 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2593 | static struct nfs4_stateid * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2594 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 2595 | { |
| 2596 | struct nfs4_stateid *stp; |
| 2597 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 2598 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2599 | stp = nfs4_alloc_stateid(); |
| 2600 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2601 | goto out; |
| 2602 | INIT_LIST_HEAD(&stp->st_hash); |
| 2603 | INIT_LIST_HEAD(&stp->st_perfile); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2604 | INIT_LIST_HEAD(&stp->st_perstateowner); |
| 2605 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2606 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2607 | list_add(&stp->st_perfile, &fp->fi_stateids); |
NeilBrown | ea1da63 | 2005-06-23 22:04:17 -0700 | [diff] [blame] | 2608 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2609 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2610 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2611 | stp->st_file = fp; |
| 2612 | stp->st_stateid.si_boot = boot_time; |
| 2613 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 2614 | stp->st_stateid.si_fileid = fp->fi_id; |
| 2615 | stp->st_stateid.si_generation = 0; |
| 2616 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 2617 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 2618 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
NeilBrown | 4c4cd22 | 2005-07-07 17:59:27 -0700 | [diff] [blame] | 2619 | stp->st_openstp = open_stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2620 | |
| 2621 | out: |
| 2622 | return stp; |
| 2623 | } |
| 2624 | |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 2625 | static int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2626 | check_lock_length(u64 offset, u64 length) |
| 2627 | { |
| 2628 | return ((length == 0) || ((length != ~(u64)0) && |
| 2629 | LOFF_OVERFLOW(offset, length))); |
| 2630 | } |
| 2631 | |
| 2632 | /* |
| 2633 | * LOCK operation |
| 2634 | */ |
| 2635 | int |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2636 | nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock, struct nfs4_stateowner **replay_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2637 | { |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2638 | struct nfs4_stateowner *open_sop = NULL; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2639 | struct nfs4_stateowner *lock_sop = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2640 | struct nfs4_stateid *lock_stp; |
| 2641 | struct file *filp; |
| 2642 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2643 | struct file_lock conflock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2644 | int status = 0; |
| 2645 | unsigned int strhashval; |
| 2646 | |
| 2647 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 2648 | (long long) lock->lk_offset, |
| 2649 | (long long) lock->lk_length); |
| 2650 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2651 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 2652 | return nfserr_inval; |
| 2653 | |
Andy Adamson | a6f6ef2 | 2006-01-18 17:43:17 -0800 | [diff] [blame] | 2654 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { |
| 2655 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
| 2656 | return status; |
| 2657 | } |
| 2658 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | nfs4_lock_state(); |
| 2660 | |
| 2661 | if (lock->lk_is_new) { |
NeilBrown | 893f877 | 2005-07-07 17:59:17 -0700 | [diff] [blame] | 2662 | /* |
| 2663 | * Client indicates that this is a new lockowner. |
| 2664 | * Use open owner and open stateid to create lock owner and |
| 2665 | * lock stateid. |
| 2666 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2667 | struct nfs4_stateid *open_stp = NULL; |
| 2668 | struct nfs4_file *fp; |
| 2669 | |
| 2670 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2671 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2672 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2673 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2674 | /* validate and update open stateid and open seqid */ |
| 2675 | status = nfs4_preprocess_seqid_op(current_fh, |
| 2676 | lock->lk_new_open_seqid, |
| 2677 | &lock->lk_new_open_stateid, |
| 2678 | CHECK_FH | OPEN_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2679 | &lock->lk_replay_owner, &open_stp, |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2680 | lock); |
NeilBrown | 3751517 | 2005-07-07 17:59:16 -0700 | [diff] [blame] | 2681 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2682 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2683 | open_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2684 | /* create lockowner and lock stateid */ |
| 2685 | fp = open_stp->st_file; |
| 2686 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 2687 | open_sop->so_client->cl_clientid.cl_id, |
| 2688 | &lock->v.new.owner); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2689 | /* XXX: Do we need to check for duplicate stateowners on |
| 2690 | * the same file, or should they just be allowed (and |
| 2691 | * create new stateids)? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2692 | status = nfserr_resource; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2693 | lock_sop = alloc_init_lock_stateowner(strhashval, |
| 2694 | open_sop->so_client, open_stp, lock); |
| 2695 | if (lock_sop == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2696 | goto out; |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2697 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2698 | if (lock_stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2699 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2700 | } else { |
| 2701 | /* lock (lock owner + lock stateid) already exists */ |
| 2702 | status = nfs4_preprocess_seqid_op(current_fh, |
| 2703 | lock->lk_old_lock_seqid, |
| 2704 | &lock->lk_old_lock_stateid, |
| 2705 | CHECK_FH | LOCK_STATE, |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2706 | &lock->lk_replay_owner, &lock_stp, lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2707 | if (status) |
| 2708 | goto out; |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2709 | lock_sop = lock->lk_replay_owner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2710 | } |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2711 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2712 | filp = lock_stp->st_vfs_file; |
| 2713 | |
NeilBrown | 0dd395d | 2005-07-07 17:59:15 -0700 | [diff] [blame] | 2714 | status = nfserr_grace; |
| 2715 | if (nfs4_in_grace() && !lock->lk_reclaim) |
| 2716 | goto out; |
| 2717 | status = nfserr_no_grace; |
| 2718 | if (!nfs4_in_grace() && lock->lk_reclaim) |
| 2719 | goto out; |
| 2720 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2721 | locks_init_lock(&file_lock); |
| 2722 | switch (lock->lk_type) { |
| 2723 | case NFS4_READ_LT: |
| 2724 | case NFS4_READW_LT: |
| 2725 | file_lock.fl_type = F_RDLCK; |
| 2726 | break; |
| 2727 | case NFS4_WRITE_LT: |
| 2728 | case NFS4_WRITEW_LT: |
| 2729 | file_lock.fl_type = F_WRLCK; |
| 2730 | break; |
| 2731 | default: |
| 2732 | status = nfserr_inval; |
| 2733 | goto out; |
| 2734 | } |
Neil Brown | b59e3c0 | 2005-09-13 01:25:38 -0700 | [diff] [blame] | 2735 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2736 | file_lock.fl_pid = current->tgid; |
| 2737 | file_lock.fl_file = filp; |
| 2738 | file_lock.fl_flags = FL_POSIX; |
| 2739 | |
| 2740 | file_lock.fl_start = lock->lk_offset; |
| 2741 | if ((lock->lk_length == ~(u64)0) || |
| 2742 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) |
| 2743 | file_lock.fl_end = ~(u64)0; |
| 2744 | else |
| 2745 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; |
| 2746 | nfs4_transform_lock_offset(&file_lock); |
| 2747 | |
| 2748 | /* |
| 2749 | * Try to lock the file in the VFS. |
| 2750 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 2751 | */ |
| 2752 | |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2753 | /* XXX?: Just to divert the locks_release_private at the start of |
| 2754 | * locks_copy_lock: */ |
| 2755 | conflock.fl_ops = NULL; |
| 2756 | conflock.fl_lmops = NULL; |
| 2757 | status = posix_lock_file_conf(filp, &file_lock, &conflock); |
| 2758 | dprintk("NFSD: nfsd4_lock: posix_lock_file_conf status %d\n",status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2759 | switch (-status) { |
| 2760 | case 0: /* success! */ |
| 2761 | update_stateid(&lock_stp->st_stateid); |
| 2762 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 2763 | sizeof(stateid_t)); |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2764 | break; |
| 2765 | case (EAGAIN): /* conflock holds conflicting lock */ |
| 2766 | status = nfserr_denied; |
| 2767 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 2768 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); |
| 2769 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2770 | case (EDEADLK): |
| 2771 | status = nfserr_deadlock; |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2772 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2773 | default: |
Andy Adamson | eb76b3f | 2006-03-26 01:37:26 -0800 | [diff] [blame] | 2774 | dprintk("NFSD: nfsd4_lock: posix_lock_file_conf() failed! status %d\n",status); |
| 2775 | status = nfserr_resource; |
| 2776 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2777 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2778 | out: |
J. Bruce Fields | 8a28051 | 2006-01-18 17:43:18 -0800 | [diff] [blame] | 2779 | if (status && lock->lk_is_new && lock_sop) |
| 2780 | release_stateowner(lock_sop); |
J. Bruce Fields | 3a65588 | 2006-01-18 17:43:19 -0800 | [diff] [blame] | 2781 | if (lock->lk_replay_owner) { |
| 2782 | nfs4_get_stateowner(lock->lk_replay_owner); |
| 2783 | *replay_owner = lock->lk_replay_owner; |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2784 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2785 | nfs4_unlock_state(); |
| 2786 | return status; |
| 2787 | } |
| 2788 | |
| 2789 | /* |
| 2790 | * LOCKT operation |
| 2791 | */ |
| 2792 | int |
| 2793 | nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) |
| 2794 | { |
| 2795 | struct inode *inode; |
| 2796 | struct file file; |
| 2797 | struct file_lock file_lock; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2798 | struct file_lock conflock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2799 | int status; |
| 2800 | |
| 2801 | if (nfs4_in_grace()) |
| 2802 | return nfserr_grace; |
| 2803 | |
| 2804 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 2805 | return nfserr_inval; |
| 2806 | |
| 2807 | lockt->lt_stateowner = NULL; |
| 2808 | nfs4_lock_state(); |
| 2809 | |
| 2810 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2811 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2812 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2813 | |
| 2814 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2815 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2816 | if (status == nfserr_symlink) |
| 2817 | status = nfserr_inval; |
| 2818 | goto out; |
| 2819 | } |
| 2820 | |
| 2821 | inode = current_fh->fh_dentry->d_inode; |
| 2822 | locks_init_lock(&file_lock); |
| 2823 | switch (lockt->lt_type) { |
| 2824 | case NFS4_READ_LT: |
| 2825 | case NFS4_READW_LT: |
| 2826 | file_lock.fl_type = F_RDLCK; |
| 2827 | break; |
| 2828 | case NFS4_WRITE_LT: |
| 2829 | case NFS4_WRITEW_LT: |
| 2830 | file_lock.fl_type = F_WRLCK; |
| 2831 | break; |
| 2832 | default: |
| 2833 | printk("NFSD: nfs4_lockt: bad lock type!\n"); |
| 2834 | status = nfserr_inval; |
| 2835 | goto out; |
| 2836 | } |
| 2837 | |
| 2838 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 2839 | &lockt->lt_clientid, &lockt->lt_owner); |
| 2840 | if (lockt->lt_stateowner) |
| 2841 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 2842 | file_lock.fl_pid = current->tgid; |
| 2843 | file_lock.fl_flags = FL_POSIX; |
| 2844 | |
| 2845 | file_lock.fl_start = lockt->lt_offset; |
| 2846 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) |
| 2847 | file_lock.fl_end = ~(u64)0; |
| 2848 | else |
| 2849 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; |
| 2850 | |
| 2851 | nfs4_transform_lock_offset(&file_lock); |
| 2852 | |
| 2853 | /* posix_test_lock uses the struct file _only_ to resolve the inode. |
| 2854 | * since LOCKT doesn't require an OPEN, and therefore a struct |
| 2855 | * file may not exist, pass posix_test_lock a struct file with |
| 2856 | * only the dentry:inode set. |
| 2857 | */ |
| 2858 | memset(&file, 0, sizeof (struct file)); |
| 2859 | file.f_dentry = current_fh->fh_dentry; |
| 2860 | |
| 2861 | status = nfs_ok; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2862 | if (posix_test_lock(&file, &file_lock, &conflock)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2863 | status = nfserr_denied; |
Andy Adamson | 8dc7c31 | 2006-03-20 13:44:26 -0500 | [diff] [blame] | 2864 | nfs4_set_lock_denied(&conflock, &lockt->lt_denied); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2865 | } |
| 2866 | out: |
| 2867 | nfs4_unlock_state(); |
| 2868 | return status; |
| 2869 | } |
| 2870 | |
| 2871 | int |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2872 | nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku, struct nfs4_stateowner **replay_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2873 | { |
| 2874 | struct nfs4_stateid *stp; |
| 2875 | struct file *filp = NULL; |
| 2876 | struct file_lock file_lock; |
| 2877 | int status; |
| 2878 | |
| 2879 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 2880 | (long long) locku->lu_offset, |
| 2881 | (long long) locku->lu_length); |
| 2882 | |
| 2883 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 2884 | return nfserr_inval; |
| 2885 | |
| 2886 | nfs4_lock_state(); |
| 2887 | |
| 2888 | if ((status = nfs4_preprocess_seqid_op(current_fh, |
| 2889 | locku->lu_seqid, |
| 2890 | &locku->lu_stateid, |
| 2891 | CHECK_FH | LOCK_STATE, |
| 2892 | &locku->lu_stateowner, &stp, NULL))) |
| 2893 | goto out; |
| 2894 | |
| 2895 | filp = stp->st_vfs_file; |
| 2896 | BUG_ON(!filp); |
| 2897 | locks_init_lock(&file_lock); |
| 2898 | file_lock.fl_type = F_UNLCK; |
| 2899 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 2900 | file_lock.fl_pid = current->tgid; |
| 2901 | file_lock.fl_file = filp; |
| 2902 | file_lock.fl_flags = FL_POSIX; |
| 2903 | file_lock.fl_start = locku->lu_offset; |
| 2904 | |
| 2905 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) |
| 2906 | file_lock.fl_end = ~(u64)0; |
| 2907 | else |
| 2908 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; |
| 2909 | nfs4_transform_lock_offset(&file_lock); |
| 2910 | |
| 2911 | /* |
| 2912 | * Try to unlock the file in the VFS. |
| 2913 | */ |
| 2914 | status = posix_lock_file(filp, &file_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2915 | if (status) { |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2916 | dprintk("NFSD: nfs4_locku: posix_lock_file failed!\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2917 | goto out_nfserr; |
| 2918 | } |
| 2919 | /* |
| 2920 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 2921 | */ |
| 2922 | update_stateid(&stp->st_stateid); |
| 2923 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2924 | |
| 2925 | out: |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2926 | if (locku->lu_stateowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2927 | nfs4_get_stateowner(locku->lu_stateowner); |
Neil Brown | f2327d9 | 2005-09-13 01:25:37 -0700 | [diff] [blame] | 2928 | *replay_owner = locku->lu_stateowner; |
| 2929 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2930 | nfs4_unlock_state(); |
| 2931 | return status; |
| 2932 | |
| 2933 | out_nfserr: |
| 2934 | status = nfserrno(status); |
| 2935 | goto out; |
| 2936 | } |
| 2937 | |
| 2938 | /* |
| 2939 | * returns |
| 2940 | * 1: locks held by lockowner |
| 2941 | * 0: no locks held by lockowner |
| 2942 | */ |
| 2943 | static int |
| 2944 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 2945 | { |
| 2946 | struct file_lock **flpp; |
| 2947 | struct inode *inode = filp->f_dentry->d_inode; |
| 2948 | int status = 0; |
| 2949 | |
| 2950 | lock_kernel(); |
| 2951 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 2952 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2953 | status = 1; |
| 2954 | goto out; |
J. Bruce Fields | 796dadf | 2006-01-18 17:43:22 -0800 | [diff] [blame] | 2955 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2956 | } |
| 2957 | out: |
| 2958 | unlock_kernel(); |
| 2959 | return status; |
| 2960 | } |
| 2961 | |
| 2962 | int |
| 2963 | nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) |
| 2964 | { |
| 2965 | clientid_t *clid = &rlockowner->rl_clientid; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2966 | struct nfs4_stateowner *sop; |
| 2967 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2968 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2969 | struct list_head matches; |
| 2970 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2971 | int status; |
| 2972 | |
| 2973 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 2974 | clid->cl_boot, clid->cl_id); |
| 2975 | |
| 2976 | /* XXX check for lease expiration */ |
| 2977 | |
| 2978 | status = nfserr_stale_clientid; |
Neil Brown | 849823c | 2005-09-13 01:25:36 -0700 | [diff] [blame] | 2979 | if (STALE_CLIENTID(clid)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2980 | return status; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2981 | |
| 2982 | nfs4_lock_state(); |
| 2983 | |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 2984 | status = nfserr_locks_held; |
| 2985 | /* XXX: we're doing a linear search through all the lockowners. |
| 2986 | * Yipes! For now we'll just hope clients aren't really using |
| 2987 | * release_lockowner much, but eventually we have to fix these |
| 2988 | * data structures. */ |
| 2989 | INIT_LIST_HEAD(&matches); |
| 2990 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 2991 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { |
| 2992 | if (!cmp_owner_str(sop, owner, clid)) |
| 2993 | continue; |
| 2994 | list_for_each_entry(stp, &sop->so_stateids, |
| 2995 | st_perstateowner) { |
| 2996 | if (check_for_locks(stp->st_vfs_file, sop)) |
| 2997 | goto out; |
| 2998 | /* Note: so_perclient unused for lockowners, |
| 2999 | * so it's OK to fool with here. */ |
| 3000 | list_add(&sop->so_perclient, &matches); |
| 3001 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3002 | } |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3003 | } |
| 3004 | /* Clients probably won't expect us to return with some (but not all) |
| 3005 | * of the lockowner state released; so don't release any until all |
| 3006 | * have been checked. */ |
| 3007 | status = nfs_ok; |
NeilBrown | 0fa822e | 2005-07-07 17:59:14 -0700 | [diff] [blame] | 3008 | while (!list_empty(&matches)) { |
| 3009 | sop = list_entry(matches.next, struct nfs4_stateowner, |
| 3010 | so_perclient); |
| 3011 | /* unhash_stateowner deletes so_perclient only |
| 3012 | * for openowners. */ |
| 3013 | list_del(&sop->so_perclient); |
NeilBrown | 3e9e3db | 2005-06-23 22:04:20 -0700 | [diff] [blame] | 3014 | release_stateowner(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3015 | } |
| 3016 | out: |
| 3017 | nfs4_unlock_state(); |
| 3018 | return status; |
| 3019 | } |
| 3020 | |
| 3021 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3022 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3023 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3024 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3025 | } |
| 3026 | |
NeilBrown | c7b9a45 | 2005-06-23 22:04:30 -0700 | [diff] [blame] | 3027 | int |
| 3028 | nfs4_has_reclaimed_state(const char *name) |
| 3029 | { |
| 3030 | unsigned int strhashval = clientstr_hashval(name); |
| 3031 | struct nfs4_client *clp; |
| 3032 | |
| 3033 | clp = find_confirmed_client_by_str(name, strhashval); |
| 3034 | return clp ? 1 : 0; |
| 3035 | } |
| 3036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3037 | /* |
| 3038 | * failure => all reset bets are off, nfserr_no_grace... |
| 3039 | */ |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3040 | int |
| 3041 | nfs4_client_to_reclaim(const char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3042 | { |
| 3043 | unsigned int strhashval; |
| 3044 | struct nfs4_client_reclaim *crp = NULL; |
| 3045 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3046 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3047 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3048 | if (!crp) |
| 3049 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3050 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3051 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3052 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3053 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3054 | reclaim_str_hashtbl_size++; |
| 3055 | return 1; |
| 3056 | } |
| 3057 | |
| 3058 | static void |
| 3059 | nfs4_release_reclaim(void) |
| 3060 | { |
| 3061 | struct nfs4_client_reclaim *crp = NULL; |
| 3062 | int i; |
| 3063 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3064 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3065 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3066 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3067 | struct nfs4_client_reclaim, cr_strhash); |
| 3068 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3069 | kfree(crp); |
| 3070 | reclaim_str_hashtbl_size--; |
| 3071 | } |
| 3072 | } |
| 3073 | BUG_ON(reclaim_str_hashtbl_size); |
| 3074 | } |
| 3075 | |
| 3076 | /* |
| 3077 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
NeilBrown | fd39ca9 | 2005-06-23 22:04:03 -0700 | [diff] [blame] | 3078 | static struct nfs4_client_reclaim * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3079 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3080 | { |
| 3081 | unsigned int strhashval; |
| 3082 | struct nfs4_client *clp; |
| 3083 | struct nfs4_client_reclaim *crp = NULL; |
| 3084 | |
| 3085 | |
| 3086 | /* find clientid in conf_id_hashtbl */ |
| 3087 | clp = find_confirmed_client(clid); |
| 3088 | if (clp == NULL) |
| 3089 | return NULL; |
| 3090 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3091 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3092 | clp->cl_name.len, clp->cl_name.data, |
| 3093 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3094 | |
| 3095 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3096 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3097 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame] | 3098 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3099 | return crp; |
| 3100 | } |
| 3101 | } |
| 3102 | return NULL; |
| 3103 | } |
| 3104 | |
| 3105 | /* |
| 3106 | * Called from OPEN. Look for clientid in reclaim list. |
| 3107 | */ |
| 3108 | int |
| 3109 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3110 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3111 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3112 | } |
| 3113 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3114 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3115 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3116 | void |
| 3117 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3118 | { |
| 3119 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3121 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3122 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3123 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3124 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3125 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
| 3126 | } |
| 3127 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3128 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3129 | } |
| 3130 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3131 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3132 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3133 | } |
| 3134 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3135 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3136 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3137 | } |
| 3138 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3139 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3140 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 3141 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3142 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3143 | INIT_LIST_HEAD(&close_lru); |
| 3144 | INIT_LIST_HEAD(&client_lru); |
| 3145 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3146 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
| 3147 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
| 3148 | reclaim_str_hashtbl_size = 0; |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3149 | } |
| 3150 | |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3151 | static void |
| 3152 | nfsd4_load_reboot_recovery_data(void) |
| 3153 | { |
| 3154 | int status; |
| 3155 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3156 | nfs4_lock_state(); |
| 3157 | nfsd4_init_recdir(user_recovery_dirname); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3158 | status = nfsd4_recdir_load(); |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3159 | nfs4_unlock_state(); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3160 | if (status) |
| 3161 | printk("NFSD: Failure reading reboot recovery data\n"); |
| 3162 | } |
| 3163 | |
NeilBrown | ac4d8ff2 | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3164 | /* initialization to perform when the nfsd service is started: */ |
| 3165 | |
| 3166 | static void |
| 3167 | __nfs4_state_start(void) |
| 3168 | { |
| 3169 | time_t grace_time; |
| 3170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3171 | boot_time = get_seconds(); |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3172 | grace_time = max(user_lease_time, lease_time); |
| 3173 | lease_time = user_lease_time; |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3174 | in_grace = 1; |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3175 | printk("NFSD: starting %ld-second grace period\n", grace_time); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3176 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3177 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3178 | } |
| 3179 | |
| 3180 | int |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3181 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3182 | { |
| 3183 | int status; |
| 3184 | |
| 3185 | if (nfs4_init) |
| 3186 | return 0; |
| 3187 | status = nfsd4_init_slabs(); |
| 3188 | if (status) |
| 3189 | return status; |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3190 | nfsd4_load_reboot_recovery_data(); |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3191 | __nfs4_state_start(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3192 | nfs4_init = 1; |
| 3193 | return 0; |
| 3194 | } |
| 3195 | |
| 3196 | int |
| 3197 | nfs4_in_grace(void) |
| 3198 | { |
NeilBrown | a76b431 | 2005-06-23 22:04:01 -0700 | [diff] [blame] | 3199 | return in_grace; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3200 | } |
| 3201 | |
| 3202 | time_t |
| 3203 | nfs4_lease_time(void) |
| 3204 | { |
| 3205 | return lease_time; |
| 3206 | } |
| 3207 | |
| 3208 | static void |
| 3209 | __nfs4_state_shutdown(void) |
| 3210 | { |
| 3211 | int i; |
| 3212 | struct nfs4_client *clp = NULL; |
| 3213 | struct nfs4_delegation *dp = NULL; |
| 3214 | struct nfs4_stateowner *sop = NULL; |
| 3215 | struct list_head *pos, *next, reaplist; |
| 3216 | |
| 3217 | list_for_each_safe(pos, next, &close_lru) { |
| 3218 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 3219 | list_del(&sop->so_close_lru); |
| 3220 | nfs4_put_stateowner(sop); |
| 3221 | } |
| 3222 | |
| 3223 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3224 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 3225 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 3226 | expire_client(clp); |
| 3227 | } |
| 3228 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 3229 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 3230 | expire_client(clp); |
| 3231 | } |
| 3232 | } |
| 3233 | INIT_LIST_HEAD(&reaplist); |
| 3234 | spin_lock(&recall_lock); |
| 3235 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3236 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3237 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3238 | } |
| 3239 | spin_unlock(&recall_lock); |
| 3240 | list_for_each_safe(pos, next, &reaplist) { |
| 3241 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3242 | list_del_init(&dp->dl_recall_lru); |
| 3243 | unhash_delegation(dp); |
| 3244 | } |
| 3245 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3246 | cancel_delayed_work(&laundromat_work); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3247 | flush_workqueue(laundry_wq); |
| 3248 | destroy_workqueue(laundry_wq); |
NeilBrown | 190e4fb | 2005-06-23 22:04:25 -0700 | [diff] [blame] | 3249 | nfsd4_shutdown_recdir(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3250 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3251 | } |
| 3252 | |
| 3253 | void |
| 3254 | nfs4_state_shutdown(void) |
| 3255 | { |
| 3256 | nfs4_lock_state(); |
| 3257 | nfs4_release_reclaim(); |
| 3258 | __nfs4_state_shutdown(); |
| 3259 | nfsd4_free_slabs(); |
| 3260 | nfs4_unlock_state(); |
| 3261 | } |
| 3262 | |
NeilBrown | 0964a3d | 2005-06-23 22:04:32 -0700 | [diff] [blame] | 3263 | static void |
| 3264 | nfs4_set_recdir(char *recdir) |
| 3265 | { |
| 3266 | nfs4_lock_state(); |
| 3267 | strcpy(user_recovery_dirname, recdir); |
| 3268 | nfs4_unlock_state(); |
| 3269 | } |
| 3270 | |
| 3271 | /* |
| 3272 | * Change the NFSv4 recovery directory to recdir. |
| 3273 | */ |
| 3274 | int |
| 3275 | nfs4_reset_recoverydir(char *recdir) |
| 3276 | { |
| 3277 | int status; |
| 3278 | struct nameidata nd; |
| 3279 | |
| 3280 | status = path_lookup(recdir, LOOKUP_FOLLOW, &nd); |
| 3281 | if (status) |
| 3282 | return status; |
| 3283 | status = -ENOTDIR; |
| 3284 | if (S_ISDIR(nd.dentry->d_inode->i_mode)) { |
| 3285 | nfs4_set_recdir(recdir); |
| 3286 | status = 0; |
| 3287 | } |
| 3288 | path_release(&nd); |
| 3289 | return status; |
| 3290 | } |
| 3291 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3292 | /* |
| 3293 | * Called when leasetime is changed. |
| 3294 | * |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3295 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
| 3296 | * simulate a reboot. Instead of doing that, we just wait till the next time |
| 3297 | * we start to register any changes in lease time. If the administrator |
| 3298 | * really wants to change the lease time *now*, they can go ahead and bring |
| 3299 | * nfsd down and then back up again after changing the lease time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3300 | */ |
| 3301 | void |
| 3302 | nfs4_reset_lease(time_t leasetime) |
| 3303 | { |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3304 | lock_kernel(); |
| 3305 | user_lease_time = leasetime; |
| 3306 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3307 | } |