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> |
| 51 | |
| 52 | #define NFSDDBG_FACILITY NFSDDBG_PROC |
| 53 | |
| 54 | /* Globals */ |
| 55 | static time_t lease_time = 90; /* default lease time */ |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 56 | static time_t user_lease_time = 90; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | time_t boot_time; |
| 58 | static time_t grace_end = 0; |
| 59 | static u32 current_clientid = 1; |
| 60 | static u32 current_ownerid = 1; |
| 61 | static u32 current_fileid = 1; |
| 62 | static u32 current_delegid = 1; |
| 63 | static u32 nfs4_init; |
| 64 | stateid_t zerostateid; /* bits all 0 */ |
| 65 | stateid_t onestateid; /* bits all 1 */ |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | /* forward declarations */ |
| 68 | struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
| 69 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
| 70 | static void release_stateid_lockowners(struct nfs4_stateid *open_stp); |
| 71 | |
| 72 | /* Locking: |
| 73 | * |
| 74 | * client_sema: |
| 75 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
| 76 | * unconfstr_hashtbl[], uncofid_hashtbl[]. |
| 77 | */ |
| 78 | static DECLARE_MUTEX(client_sema); |
| 79 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 80 | kmem_cache_t *stateowner_slab = NULL; |
| 81 | kmem_cache_t *file_slab = NULL; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 82 | kmem_cache_t *stateid_slab = NULL; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 83 | kmem_cache_t *deleg_slab = NULL; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 84 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | void |
| 86 | nfs4_lock_state(void) |
| 87 | { |
| 88 | down(&client_sema); |
| 89 | } |
| 90 | |
| 91 | void |
| 92 | nfs4_unlock_state(void) |
| 93 | { |
| 94 | up(&client_sema); |
| 95 | } |
| 96 | |
| 97 | static inline u32 |
| 98 | opaque_hashval(const void *ptr, int nbytes) |
| 99 | { |
| 100 | unsigned char *cptr = (unsigned char *) ptr; |
| 101 | |
| 102 | u32 x = 0; |
| 103 | while (nbytes--) { |
| 104 | x *= 37; |
| 105 | x += *cptr++; |
| 106 | } |
| 107 | return x; |
| 108 | } |
| 109 | |
| 110 | /* forward declarations */ |
| 111 | static void release_stateowner(struct nfs4_stateowner *sop); |
| 112 | static void release_stateid(struct nfs4_stateid *stp, int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | |
| 114 | /* |
| 115 | * Delegation state |
| 116 | */ |
| 117 | |
| 118 | /* recall_lock protects the del_recall_lru */ |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 119 | spinlock_t recall_lock = SPIN_LOCK_UNLOCKED; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | static struct list_head del_recall_lru; |
| 121 | |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 122 | static void |
| 123 | free_nfs4_file(struct kref *kref) |
| 124 | { |
| 125 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); |
| 126 | list_del(&fp->fi_hash); |
| 127 | iput(fp->fi_inode); |
| 128 | kmem_cache_free(file_slab, fp); |
| 129 | } |
| 130 | |
| 131 | static inline void |
| 132 | put_nfs4_file(struct nfs4_file *fi) |
| 133 | { |
| 134 | kref_put(&fi->fi_ref, free_nfs4_file); |
| 135 | } |
| 136 | |
| 137 | static inline void |
| 138 | get_nfs4_file(struct nfs4_file *fi) |
| 139 | { |
| 140 | kref_get(&fi->fi_ref); |
| 141 | } |
| 142 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | static struct nfs4_delegation * |
| 144 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) |
| 145 | { |
| 146 | struct nfs4_delegation *dp; |
| 147 | struct nfs4_file *fp = stp->st_file; |
| 148 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; |
| 149 | |
| 150 | dprintk("NFSD alloc_init_deleg\n"); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 151 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
| 152 | if (dp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | return dp; |
| 154 | INIT_LIST_HEAD(&dp->dl_del_perfile); |
| 155 | INIT_LIST_HEAD(&dp->dl_del_perclnt); |
| 156 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
| 157 | dp->dl_client = clp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 158 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | dp->dl_file = fp; |
| 160 | dp->dl_flock = NULL; |
| 161 | get_file(stp->st_vfs_file); |
| 162 | dp->dl_vfs_file = stp->st_vfs_file; |
| 163 | dp->dl_type = type; |
| 164 | dp->dl_recall.cbr_dp = NULL; |
| 165 | dp->dl_recall.cbr_ident = cb->cb_ident; |
| 166 | dp->dl_recall.cbr_trunc = 0; |
| 167 | dp->dl_stateid.si_boot = boot_time; |
| 168 | dp->dl_stateid.si_stateownerid = current_delegid++; |
| 169 | dp->dl_stateid.si_fileid = 0; |
| 170 | dp->dl_stateid.si_generation = 0; |
| 171 | dp->dl_fhlen = current_fh->fh_handle.fh_size; |
| 172 | memcpy(dp->dl_fhval, ¤t_fh->fh_handle.fh_base, |
| 173 | current_fh->fh_handle.fh_size); |
| 174 | dp->dl_time = 0; |
| 175 | atomic_set(&dp->dl_count, 1); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 176 | list_add(&dp->dl_del_perfile, &fp->fi_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | list_add(&dp->dl_del_perclnt, &clp->cl_del_perclnt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | return dp; |
| 179 | } |
| 180 | |
| 181 | void |
| 182 | nfs4_put_delegation(struct nfs4_delegation *dp) |
| 183 | { |
| 184 | if (atomic_dec_and_test(&dp->dl_count)) { |
| 185 | dprintk("NFSD: freeing dp %p\n",dp); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 186 | put_nfs4_file(dp->dl_file); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 187 | kmem_cache_free(deleg_slab, dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | } |
| 189 | } |
| 190 | |
| 191 | /* Remove the associated file_lock first, then remove the delegation. |
| 192 | * lease_modify() is called to remove the FS_LEASE file_lock from |
| 193 | * the i_flock list, eventually calling nfsd's lock_manager |
| 194 | * fl_release_callback. |
| 195 | */ |
| 196 | static void |
| 197 | nfs4_close_delegation(struct nfs4_delegation *dp) |
| 198 | { |
| 199 | struct file *filp = dp->dl_vfs_file; |
| 200 | |
| 201 | dprintk("NFSD: close_delegation dp %p\n",dp); |
| 202 | dp->dl_vfs_file = NULL; |
| 203 | /* The following nfsd_close may not actually close the file, |
| 204 | * but we want to remove the lease in any case. */ |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 205 | if (dp->dl_flock) |
| 206 | setlease(filp, F_UNLCK, &dp->dl_flock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | } |
| 209 | |
| 210 | /* Called under the state lock. */ |
| 211 | static void |
| 212 | unhash_delegation(struct nfs4_delegation *dp) |
| 213 | { |
| 214 | list_del_init(&dp->dl_del_perfile); |
| 215 | list_del_init(&dp->dl_del_perclnt); |
| 216 | spin_lock(&recall_lock); |
| 217 | list_del_init(&dp->dl_recall_lru); |
| 218 | spin_unlock(&recall_lock); |
| 219 | nfs4_close_delegation(dp); |
| 220 | nfs4_put_delegation(dp); |
| 221 | } |
| 222 | |
| 223 | /* |
| 224 | * SETCLIENTID state |
| 225 | */ |
| 226 | |
| 227 | /* Hash tables for nfs4_clientid state */ |
| 228 | #define CLIENT_HASH_BITS 4 |
| 229 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) |
| 230 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) |
| 231 | |
| 232 | #define clientid_hashval(id) \ |
| 233 | ((id) & CLIENT_HASH_MASK) |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 234 | #define clientstr_hashval(name) \ |
| 235 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | /* |
| 237 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot |
| 238 | * used in reboot/reset lease grace period processing |
| 239 | * |
| 240 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed |
| 241 | * setclientid_confirmed info. |
| 242 | * |
| 243 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed |
| 244 | * setclientid info. |
| 245 | * |
| 246 | * client_lru holds client queue ordered by nfs4_client.cl_time |
| 247 | * for lease renewal. |
| 248 | * |
| 249 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time |
| 250 | * for last close replay. |
| 251 | */ |
| 252 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; |
| 253 | static int reclaim_str_hashtbl_size = 0; |
| 254 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 255 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 256 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; |
| 257 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; |
| 258 | static struct list_head client_lru; |
| 259 | static struct list_head close_lru; |
| 260 | |
| 261 | static inline void |
| 262 | renew_client(struct nfs4_client *clp) |
| 263 | { |
| 264 | /* |
| 265 | * Move client to the end to the LRU list. |
| 266 | */ |
| 267 | dprintk("renewing client (clientid %08x/%08x)\n", |
| 268 | clp->cl_clientid.cl_boot, |
| 269 | clp->cl_clientid.cl_id); |
| 270 | list_move_tail(&clp->cl_lru, &client_lru); |
| 271 | clp->cl_time = get_seconds(); |
| 272 | } |
| 273 | |
| 274 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ |
| 275 | static int |
| 276 | STALE_CLIENTID(clientid_t *clid) |
| 277 | { |
| 278 | if (clid->cl_boot == boot_time) |
| 279 | return 0; |
| 280 | dprintk("NFSD stale clientid (%08x/%08x)\n", |
| 281 | clid->cl_boot, clid->cl_id); |
| 282 | return 1; |
| 283 | } |
| 284 | |
| 285 | /* |
| 286 | * XXX Should we use a slab cache ? |
| 287 | * This type of memory management is somewhat inefficient, but we use it |
| 288 | * anyway since SETCLIENTID is not a common operation. |
| 289 | */ |
| 290 | static inline struct nfs4_client * |
| 291 | alloc_client(struct xdr_netobj name) |
| 292 | { |
| 293 | struct nfs4_client *clp; |
| 294 | |
| 295 | if ((clp = kmalloc(sizeof(struct nfs4_client), GFP_KERNEL))!= NULL) { |
| 296 | memset(clp, 0, sizeof(*clp)); |
| 297 | if ((clp->cl_name.data = kmalloc(name.len, GFP_KERNEL)) != NULL) { |
| 298 | memcpy(clp->cl_name.data, name.data, name.len); |
| 299 | clp->cl_name.len = name.len; |
| 300 | } |
| 301 | else { |
| 302 | kfree(clp); |
| 303 | clp = NULL; |
| 304 | } |
| 305 | } |
| 306 | return clp; |
| 307 | } |
| 308 | |
| 309 | static inline void |
| 310 | free_client(struct nfs4_client *clp) |
| 311 | { |
| 312 | if (clp->cl_cred.cr_group_info) |
| 313 | put_group_info(clp->cl_cred.cr_group_info); |
| 314 | kfree(clp->cl_name.data); |
| 315 | kfree(clp); |
| 316 | } |
| 317 | |
| 318 | void |
| 319 | put_nfs4_client(struct nfs4_client *clp) |
| 320 | { |
| 321 | if (atomic_dec_and_test(&clp->cl_count)) |
| 322 | free_client(clp); |
| 323 | } |
| 324 | |
| 325 | static void |
| 326 | expire_client(struct nfs4_client *clp) |
| 327 | { |
| 328 | struct nfs4_stateowner *sop; |
| 329 | struct nfs4_delegation *dp; |
| 330 | struct nfs4_callback *cb = &clp->cl_callback; |
| 331 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; |
| 332 | struct list_head reaplist; |
| 333 | |
| 334 | dprintk("NFSD: expire_client cl_count %d\n", |
| 335 | atomic_read(&clp->cl_count)); |
| 336 | |
| 337 | /* shutdown rpc client, ending any outstanding recall rpcs */ |
| 338 | if (atomic_read(&cb->cb_set) == 1 && clnt) { |
| 339 | rpc_shutdown_client(clnt); |
| 340 | clnt = clp->cl_callback.cb_client = NULL; |
| 341 | } |
| 342 | |
| 343 | INIT_LIST_HEAD(&reaplist); |
| 344 | spin_lock(&recall_lock); |
| 345 | while (!list_empty(&clp->cl_del_perclnt)) { |
| 346 | dp = list_entry(clp->cl_del_perclnt.next, struct nfs4_delegation, dl_del_perclnt); |
| 347 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
| 348 | dp->dl_flock); |
| 349 | list_del_init(&dp->dl_del_perclnt); |
| 350 | list_move(&dp->dl_recall_lru, &reaplist); |
| 351 | } |
| 352 | spin_unlock(&recall_lock); |
| 353 | while (!list_empty(&reaplist)) { |
| 354 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); |
| 355 | list_del_init(&dp->dl_recall_lru); |
| 356 | unhash_delegation(dp); |
| 357 | } |
| 358 | list_del(&clp->cl_idhash); |
| 359 | list_del(&clp->cl_strhash); |
| 360 | list_del(&clp->cl_lru); |
| 361 | while (!list_empty(&clp->cl_perclient)) { |
| 362 | sop = list_entry(clp->cl_perclient.next, struct nfs4_stateowner, so_perclient); |
| 363 | release_stateowner(sop); |
| 364 | } |
| 365 | put_nfs4_client(clp); |
| 366 | } |
| 367 | |
| 368 | static struct nfs4_client * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 369 | create_client(struct xdr_netobj name, char *recdir) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | struct nfs4_client *clp; |
| 371 | |
| 372 | if (!(clp = alloc_client(name))) |
| 373 | goto out; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 374 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | atomic_set(&clp->cl_count, 1); |
| 376 | atomic_set(&clp->cl_callback.cb_set, 0); |
| 377 | clp->cl_callback.cb_parsed = 0; |
| 378 | INIT_LIST_HEAD(&clp->cl_idhash); |
| 379 | INIT_LIST_HEAD(&clp->cl_strhash); |
| 380 | INIT_LIST_HEAD(&clp->cl_perclient); |
| 381 | INIT_LIST_HEAD(&clp->cl_del_perclnt); |
| 382 | INIT_LIST_HEAD(&clp->cl_lru); |
| 383 | out: |
| 384 | return clp; |
| 385 | } |
| 386 | |
| 387 | static void |
| 388 | copy_verf(struct nfs4_client *target, nfs4_verifier *source) { |
| 389 | memcpy(target->cl_verifier.data, source->data, sizeof(target->cl_verifier.data)); |
| 390 | } |
| 391 | |
| 392 | static void |
| 393 | copy_clid(struct nfs4_client *target, struct nfs4_client *source) { |
| 394 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
| 395 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; |
| 396 | } |
| 397 | |
| 398 | static void |
| 399 | copy_cred(struct svc_cred *target, struct svc_cred *source) { |
| 400 | |
| 401 | target->cr_uid = source->cr_uid; |
| 402 | target->cr_gid = source->cr_gid; |
| 403 | target->cr_group_info = source->cr_group_info; |
| 404 | get_group_info(target->cr_group_info); |
| 405 | } |
| 406 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 407 | static inline int |
| 408 | same_name(const char *n1, const char *n2) { |
| 409 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | static int |
| 413 | cmp_verf(nfs4_verifier *v1, nfs4_verifier *v2) { |
| 414 | return(!memcmp(v1->data,v2->data,sizeof(v1->data))); |
| 415 | } |
| 416 | |
| 417 | static int |
| 418 | cmp_clid(clientid_t * cl1, clientid_t * cl2) { |
| 419 | return((cl1->cl_boot == cl2->cl_boot) && |
| 420 | (cl1->cl_id == cl2->cl_id)); |
| 421 | } |
| 422 | |
| 423 | /* XXX what about NGROUP */ |
| 424 | static int |
| 425 | cmp_creds(struct svc_cred *cr1, struct svc_cred *cr2){ |
| 426 | return(cr1->cr_uid == cr2->cr_uid); |
| 427 | |
| 428 | } |
| 429 | |
| 430 | static void |
| 431 | gen_clid(struct nfs4_client *clp) { |
| 432 | clp->cl_clientid.cl_boot = boot_time; |
| 433 | clp->cl_clientid.cl_id = current_clientid++; |
| 434 | } |
| 435 | |
| 436 | static void |
| 437 | gen_confirm(struct nfs4_client *clp) { |
| 438 | struct timespec tv; |
| 439 | u32 * p; |
| 440 | |
| 441 | tv = CURRENT_TIME; |
| 442 | p = (u32 *)clp->cl_confirm.data; |
| 443 | *p++ = tv.tv_sec; |
| 444 | *p++ = tv.tv_nsec; |
| 445 | } |
| 446 | |
| 447 | static int |
| 448 | check_name(struct xdr_netobj name) { |
| 449 | |
| 450 | if (name.len == 0) |
| 451 | return 0; |
| 452 | if (name.len > NFS4_OPAQUE_LIMIT) { |
| 453 | printk("NFSD: check_name: name too long(%d)!\n", name.len); |
| 454 | return 0; |
| 455 | } |
| 456 | return 1; |
| 457 | } |
| 458 | |
| 459 | void |
| 460 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
| 461 | { |
| 462 | unsigned int idhashval; |
| 463 | |
| 464 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); |
| 465 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 466 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); |
| 467 | list_add_tail(&clp->cl_lru, &client_lru); |
| 468 | clp->cl_time = get_seconds(); |
| 469 | } |
| 470 | |
| 471 | void |
| 472 | move_to_confirmed(struct nfs4_client *clp) |
| 473 | { |
| 474 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); |
| 475 | unsigned int strhashval; |
| 476 | |
| 477 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); |
| 478 | list_del_init(&clp->cl_strhash); |
| 479 | list_del_init(&clp->cl_idhash); |
| 480 | list_add(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 481 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
| 483 | renew_client(clp); |
| 484 | } |
| 485 | |
| 486 | static struct nfs4_client * |
| 487 | find_confirmed_client(clientid_t *clid) |
| 488 | { |
| 489 | struct nfs4_client *clp; |
| 490 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 491 | |
| 492 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { |
| 493 | if (cmp_clid(&clp->cl_clientid, clid)) |
| 494 | return clp; |
| 495 | } |
| 496 | return NULL; |
| 497 | } |
| 498 | |
| 499 | static struct nfs4_client * |
| 500 | find_unconfirmed_client(clientid_t *clid) |
| 501 | { |
| 502 | struct nfs4_client *clp; |
| 503 | unsigned int idhashval = clientid_hashval(clid->cl_id); |
| 504 | |
| 505 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { |
| 506 | if (cmp_clid(&clp->cl_clientid, clid)) |
| 507 | return clp; |
| 508 | } |
| 509 | return NULL; |
| 510 | } |
| 511 | |
| 512 | /* a helper function for parse_callback */ |
| 513 | static int |
| 514 | parse_octet(unsigned int *lenp, char **addrp) |
| 515 | { |
| 516 | unsigned int len = *lenp; |
| 517 | char *p = *addrp; |
| 518 | int n = -1; |
| 519 | char c; |
| 520 | |
| 521 | for (;;) { |
| 522 | if (!len) |
| 523 | break; |
| 524 | len--; |
| 525 | c = *p++; |
| 526 | if (c == '.') |
| 527 | break; |
| 528 | if ((c < '0') || (c > '9')) { |
| 529 | n = -1; |
| 530 | break; |
| 531 | } |
| 532 | if (n < 0) |
| 533 | n = 0; |
| 534 | n = (n * 10) + (c - '0'); |
| 535 | if (n > 255) { |
| 536 | n = -1; |
| 537 | break; |
| 538 | } |
| 539 | } |
| 540 | *lenp = len; |
| 541 | *addrp = p; |
| 542 | return n; |
| 543 | } |
| 544 | |
| 545 | /* parse and set the setclientid ipv4 callback address */ |
| 546 | int |
| 547 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
| 548 | { |
| 549 | int temp = 0; |
| 550 | u32 cbaddr = 0; |
| 551 | u16 cbport = 0; |
| 552 | u32 addrlen = addr_len; |
| 553 | char *addr = addr_val; |
| 554 | int i, shift; |
| 555 | |
| 556 | /* ipaddress */ |
| 557 | shift = 24; |
| 558 | for(i = 4; i > 0 ; i--) { |
| 559 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 560 | return 0; |
| 561 | } |
| 562 | cbaddr |= (temp << shift); |
| 563 | if (shift > 0) |
| 564 | shift -= 8; |
| 565 | } |
| 566 | *cbaddrp = cbaddr; |
| 567 | |
| 568 | /* port */ |
| 569 | shift = 8; |
| 570 | for(i = 2; i > 0 ; i--) { |
| 571 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { |
| 572 | return 0; |
| 573 | } |
| 574 | cbport |= (temp << shift); |
| 575 | if (shift > 0) |
| 576 | shift -= 8; |
| 577 | } |
| 578 | *cbportp = cbport; |
| 579 | return 1; |
| 580 | } |
| 581 | |
| 582 | void |
| 583 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
| 584 | { |
| 585 | struct nfs4_callback *cb = &clp->cl_callback; |
| 586 | |
| 587 | /* Currently, we only support tcp for the callback channel */ |
| 588 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) |
| 589 | goto out_err; |
| 590 | |
| 591 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, |
| 592 | &cb->cb_addr, &cb->cb_port))) |
| 593 | goto out_err; |
| 594 | cb->cb_prog = se->se_callback_prog; |
| 595 | cb->cb_ident = se->se_callback_ident; |
| 596 | cb->cb_parsed = 1; |
| 597 | return; |
| 598 | out_err: |
| 599 | printk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
| 600 | "will not receive delegations\n", |
| 601 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 602 | |
| 603 | cb->cb_parsed = 0; |
| 604 | return; |
| 605 | } |
| 606 | |
| 607 | /* |
| 608 | * RFC 3010 has a complex implmentation description of processing a |
| 609 | * SETCLIENTID request consisting of 5 bullets, labeled as |
| 610 | * CASE0 - CASE4 below. |
| 611 | * |
| 612 | * NOTES: |
| 613 | * callback information will be processed in a future patch |
| 614 | * |
| 615 | * an unconfirmed record is added when: |
| 616 | * NORMAL (part of CASE 4): there is no confirmed nor unconfirmed record. |
| 617 | * CASE 1: confirmed record found with matching name, principal, |
| 618 | * verifier, and clientid. |
| 619 | * CASE 2: confirmed record found with matching name, principal, |
| 620 | * and there is no unconfirmed record with matching |
| 621 | * name and principal |
| 622 | * |
| 623 | * an unconfirmed record is replaced when: |
| 624 | * CASE 3: confirmed record found with matching name, principal, |
| 625 | * and an unconfirmed record is found with matching |
| 626 | * name, principal, and with clientid and |
| 627 | * confirm that does not match the confirmed record. |
| 628 | * CASE 4: there is no confirmed record with matching name and |
| 629 | * principal. there is an unconfirmed record with |
| 630 | * matching name, principal. |
| 631 | * |
| 632 | * an unconfirmed record is deleted when: |
| 633 | * CASE 1: an unconfirmed record that matches input name, verifier, |
| 634 | * and confirmed clientid. |
| 635 | * CASE 4: any unconfirmed records with matching name and principal |
| 636 | * that exist after an unconfirmed record has been replaced |
| 637 | * as described above. |
| 638 | * |
| 639 | */ |
| 640 | int |
| 641 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_setclientid *setclid) |
| 642 | { |
| 643 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; |
| 644 | struct xdr_netobj clname = { |
| 645 | .len = setclid->se_namelen, |
| 646 | .data = setclid->se_name, |
| 647 | }; |
| 648 | nfs4_verifier clverifier = setclid->se_verf; |
| 649 | unsigned int strhashval; |
| 650 | struct nfs4_client * conf, * unconf, * new, * clp; |
| 651 | int status; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 652 | char dname[HEXDIR_LEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 653 | |
| 654 | status = nfserr_inval; |
| 655 | if (!check_name(clname)) |
| 656 | goto out; |
| 657 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 658 | status = nfs4_make_rec_clidname(dname, &clname); |
| 659 | if (status) |
| 660 | goto out; |
| 661 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 662 | /* |
| 663 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 664 | * We get here on a DRC miss. |
| 665 | */ |
| 666 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 667 | strhashval = clientstr_hashval(dname); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | |
| 669 | conf = NULL; |
| 670 | nfs4_lock_state(); |
| 671 | list_for_each_entry(clp, &conf_str_hashtbl[strhashval], cl_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 672 | if (!same_name(clp->cl_recdir, dname)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 673 | continue; |
| 674 | /* |
| 675 | * CASE 0: |
| 676 | * clname match, confirmed, different principal |
| 677 | * or different ip_address |
| 678 | */ |
| 679 | status = nfserr_clid_inuse; |
NeilBrown | 7dea9d2 | 2005-06-23 22:03:42 -0700 | [diff] [blame] | 680 | if (!cmp_creds(&clp->cl_cred,&rqstp->rq_cred) |
| 681 | || clp->cl_addr != ip_addr) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 682 | printk("NFSD: setclientid: string in use by client" |
| 683 | "(clientid %08x/%08x)\n", |
| 684 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 685 | goto out; |
| 686 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 687 | conf = clp; |
| 688 | break; |
| 689 | } |
| 690 | unconf = NULL; |
| 691 | list_for_each_entry(clp, &unconf_str_hashtbl[strhashval], cl_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 692 | if (!same_name(clp->cl_recdir, dname)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | continue; |
| 694 | /* cl_name match from a previous SETCLIENTID operation */ |
| 695 | unconf = clp; |
| 696 | break; |
| 697 | } |
| 698 | status = nfserr_resource; |
| 699 | if (!conf) { |
| 700 | /* |
| 701 | * CASE 4: |
| 702 | * placed first, because it is the normal case. |
| 703 | */ |
| 704 | if (unconf) |
| 705 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 706 | new = create_client(clname, dname); |
| 707 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 708 | goto out; |
| 709 | copy_verf(new, &clverifier); |
| 710 | new->cl_addr = ip_addr; |
| 711 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 712 | gen_clid(new); |
| 713 | gen_confirm(new); |
| 714 | gen_callback(new, setclid); |
| 715 | add_to_unconfirmed(new, strhashval); |
| 716 | } else if (cmp_verf(&conf->cl_verifier, &clverifier)) { |
| 717 | /* |
| 718 | * CASE 1: |
| 719 | * cl_name match, confirmed, principal match |
| 720 | * verifier match: probable callback update |
| 721 | * |
| 722 | * remove any unconfirmed nfs4_client with |
| 723 | * matching cl_name, cl_verifier, and cl_clientid |
| 724 | * |
| 725 | * create and insert an unconfirmed nfs4_client with same |
| 726 | * cl_name, cl_verifier, and cl_clientid as existing |
| 727 | * nfs4_client, but with the new callback info and a |
| 728 | * new cl_confirm |
| 729 | */ |
| 730 | if ((unconf) && |
| 731 | cmp_verf(&unconf->cl_verifier, &conf->cl_verifier) && |
| 732 | cmp_clid(&unconf->cl_clientid, &conf->cl_clientid)) { |
| 733 | expire_client(unconf); |
| 734 | } |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 735 | new = create_client(clname, dname); |
| 736 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | goto out; |
| 738 | copy_verf(new,&conf->cl_verifier); |
| 739 | new->cl_addr = ip_addr; |
| 740 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 741 | copy_clid(new, conf); |
| 742 | gen_confirm(new); |
| 743 | gen_callback(new, setclid); |
| 744 | add_to_unconfirmed(new,strhashval); |
| 745 | } else if (!unconf) { |
| 746 | /* |
| 747 | * CASE 2: |
| 748 | * clname match, confirmed, principal match |
| 749 | * verfier does not match |
| 750 | * no unconfirmed. create a new unconfirmed nfs4_client |
| 751 | * using input clverifier, clname, and callback info |
| 752 | * and generate a new cl_clientid and cl_confirm. |
| 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,&clverifier); |
| 758 | new->cl_addr = ip_addr; |
| 759 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 760 | gen_clid(new); |
| 761 | gen_confirm(new); |
| 762 | gen_callback(new, setclid); |
| 763 | add_to_unconfirmed(new, strhashval); |
| 764 | } else if (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm)) { |
| 765 | /* |
| 766 | * CASE3: |
| 767 | * confirmed found (name, principal match) |
| 768 | * confirmed verifier does not match input clverifier |
| 769 | * |
| 770 | * unconfirmed found (name match) |
| 771 | * confirmed->cl_confirm != unconfirmed->cl_confirm |
| 772 | * |
| 773 | * remove unconfirmed. |
| 774 | * |
| 775 | * create an unconfirmed nfs4_client |
| 776 | * with same cl_name as existing confirmed nfs4_client, |
| 777 | * but with new callback info, new cl_clientid, |
| 778 | * new cl_verifier and a new cl_confirm |
| 779 | */ |
| 780 | expire_client(unconf); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 781 | new = create_client(clname, dname); |
| 782 | if (new == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 783 | goto out; |
| 784 | copy_verf(new,&clverifier); |
| 785 | new->cl_addr = ip_addr; |
| 786 | copy_cred(&new->cl_cred,&rqstp->rq_cred); |
| 787 | gen_clid(new); |
| 788 | gen_confirm(new); |
| 789 | gen_callback(new, setclid); |
| 790 | add_to_unconfirmed(new, strhashval); |
| 791 | } else { |
| 792 | /* No cases hit !!! */ |
| 793 | status = nfserr_inval; |
| 794 | goto out; |
| 795 | |
| 796 | } |
| 797 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
| 798 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; |
| 799 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); |
| 800 | status = nfs_ok; |
| 801 | out: |
| 802 | nfs4_unlock_state(); |
| 803 | return status; |
| 804 | } |
| 805 | |
| 806 | |
| 807 | /* |
| 808 | * RFC 3010 has a complex implmentation description of processing a |
| 809 | * SETCLIENTID_CONFIRM request consisting of 4 bullets describing |
| 810 | * processing on a DRC miss, labeled as CASE1 - CASE4 below. |
| 811 | * |
| 812 | * NOTE: callback information will be processed here in a future patch |
| 813 | */ |
| 814 | int |
| 815 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confirm *setclientid_confirm) |
| 816 | { |
| 817 | u32 ip_addr = rqstp->rq_addr.sin_addr.s_addr; |
| 818 | struct nfs4_client *clp, *conf = NULL, *unconf = NULL; |
| 819 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
| 820 | clientid_t * clid = &setclientid_confirm->sc_clientid; |
| 821 | int status; |
| 822 | |
| 823 | if (STALE_CLIENTID(clid)) |
| 824 | return nfserr_stale_clientid; |
| 825 | /* |
| 826 | * XXX The Duplicate Request Cache (DRC) has been checked (??) |
| 827 | * We get here on a DRC miss. |
| 828 | */ |
| 829 | |
| 830 | nfs4_lock_state(); |
| 831 | clp = find_confirmed_client(clid); |
| 832 | if (clp) { |
| 833 | status = nfserr_inval; |
| 834 | /* |
| 835 | * Found a record for this clientid. If the IP addresses |
| 836 | * don't match, return ERR_INVAL just as if the record had |
| 837 | * not been found. |
| 838 | */ |
| 839 | if (clp->cl_addr != ip_addr) { |
| 840 | printk("NFSD: setclientid: string in use by client" |
| 841 | "(clientid %08x/%08x)\n", |
| 842 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 843 | goto out; |
| 844 | } |
| 845 | conf = clp; |
| 846 | } |
| 847 | clp = find_unconfirmed_client(clid); |
| 848 | if (clp) { |
| 849 | status = nfserr_inval; |
| 850 | if (clp->cl_addr != ip_addr) { |
| 851 | printk("NFSD: setclientid: string in use by client" |
| 852 | "(clientid %08x/%08x)\n", |
| 853 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 854 | goto out; |
| 855 | } |
| 856 | unconf = clp; |
| 857 | } |
| 858 | /* CASE 1: |
| 859 | * unconf record that matches input clientid and input confirm. |
| 860 | * conf record that matches input clientid. |
| 861 | * conf and unconf records match names, verifiers |
| 862 | */ |
| 863 | if ((conf && unconf) && |
| 864 | (cmp_verf(&unconf->cl_confirm, &confirm)) && |
| 865 | (cmp_verf(&conf->cl_verifier, &unconf->cl_verifier)) && |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 866 | (same_name(conf->cl_recdir,unconf->cl_recdir)) && |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 867 | (!cmp_verf(&conf->cl_confirm, &unconf->cl_confirm))) { |
| 868 | if (!cmp_creds(&conf->cl_cred, &unconf->cl_cred)) |
| 869 | status = nfserr_clid_inuse; |
| 870 | else { |
| 871 | expire_client(conf); |
| 872 | clp = unconf; |
| 873 | move_to_confirmed(unconf); |
| 874 | status = nfs_ok; |
| 875 | } |
| 876 | goto out; |
| 877 | } |
| 878 | /* CASE 2: |
| 879 | * conf record that matches input clientid. |
| 880 | * if unconf record that matches input clientid, then unconf->cl_name |
| 881 | * or unconf->cl_verifier don't match the conf record. |
| 882 | */ |
| 883 | if ((conf && !unconf) || |
| 884 | ((conf && unconf) && |
| 885 | (!cmp_verf(&conf->cl_verifier, &unconf->cl_verifier) || |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 886 | !same_name(conf->cl_recdir, unconf->cl_recdir)))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 887 | if (!cmp_creds(&conf->cl_cred,&rqstp->rq_cred)) { |
| 888 | status = nfserr_clid_inuse; |
| 889 | } else { |
| 890 | clp = conf; |
| 891 | status = nfs_ok; |
| 892 | } |
| 893 | goto out; |
| 894 | } |
| 895 | /* CASE 3: |
| 896 | * conf record not found. |
| 897 | * unconf record found. |
| 898 | * unconf->cl_confirm matches input confirm |
| 899 | */ |
| 900 | if (!conf && unconf && cmp_verf(&unconf->cl_confirm, &confirm)) { |
| 901 | if (!cmp_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
| 902 | status = nfserr_clid_inuse; |
| 903 | } else { |
| 904 | status = nfs_ok; |
| 905 | clp = unconf; |
| 906 | move_to_confirmed(unconf); |
| 907 | } |
| 908 | goto out; |
| 909 | } |
| 910 | /* CASE 4: |
| 911 | * conf record not found, or if conf, then conf->cl_confirm does not |
| 912 | * match input confirm. |
| 913 | * unconf record not found, or if unconf, then unconf->cl_confirm |
| 914 | * does not match input confirm. |
| 915 | */ |
| 916 | if ((!conf || (conf && !cmp_verf(&conf->cl_confirm, &confirm))) && |
| 917 | (!unconf || (unconf && !cmp_verf(&unconf->cl_confirm, &confirm)))) { |
| 918 | status = nfserr_stale_clientid; |
| 919 | goto out; |
| 920 | } |
| 921 | /* check that we have hit one of the cases...*/ |
| 922 | status = nfserr_inval; |
| 923 | goto out; |
| 924 | out: |
| 925 | if (!status) |
| 926 | nfsd4_probe_callback(clp); |
| 927 | nfs4_unlock_state(); |
| 928 | return status; |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * Open owner state (share locks) |
| 933 | */ |
| 934 | |
| 935 | /* hash tables for nfs4_stateowner */ |
| 936 | #define OWNER_HASH_BITS 8 |
| 937 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) |
| 938 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) |
| 939 | |
| 940 | #define ownerid_hashval(id) \ |
| 941 | ((id) & OWNER_HASH_MASK) |
| 942 | #define ownerstr_hashval(clientid, ownername) \ |
| 943 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) |
| 944 | |
| 945 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; |
| 946 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; |
| 947 | |
| 948 | /* hash table for nfs4_file */ |
| 949 | #define FILE_HASH_BITS 8 |
| 950 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) |
| 951 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) |
| 952 | /* hash table for (open)nfs4_stateid */ |
| 953 | #define STATEID_HASH_BITS 10 |
| 954 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) |
| 955 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) |
| 956 | |
| 957 | #define file_hashval(x) \ |
| 958 | hash_ptr(x, FILE_HASH_BITS) |
| 959 | #define stateid_hashval(owner_id, file_id) \ |
| 960 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) |
| 961 | |
| 962 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; |
| 963 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; |
| 964 | |
| 965 | /* OPEN Share state helper functions */ |
| 966 | static inline struct nfs4_file * |
| 967 | alloc_init_file(struct inode *ino) |
| 968 | { |
| 969 | struct nfs4_file *fp; |
| 970 | unsigned int hashval = file_hashval(ino); |
| 971 | |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 972 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
| 973 | if (fp) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 974 | kref_init(&fp->fi_ref); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | INIT_LIST_HEAD(&fp->fi_hash); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 976 | INIT_LIST_HEAD(&fp->fi_stateids); |
| 977 | INIT_LIST_HEAD(&fp->fi_delegations); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
| 979 | fp->fi_inode = igrab(ino); |
| 980 | fp->fi_id = current_fileid++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 981 | return fp; |
| 982 | } |
| 983 | return NULL; |
| 984 | } |
| 985 | |
| 986 | static void |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 987 | nfsd4_free_slab(kmem_cache_t **slab) |
| 988 | { |
| 989 | int status; |
| 990 | |
| 991 | if (*slab == NULL) |
| 992 | return; |
| 993 | status = kmem_cache_destroy(*slab); |
| 994 | *slab = NULL; |
| 995 | WARN_ON(status); |
| 996 | } |
| 997 | |
| 998 | static void |
| 999 | nfsd4_free_slabs(void) |
| 1000 | { |
| 1001 | nfsd4_free_slab(&stateowner_slab); |
| 1002 | nfsd4_free_slab(&file_slab); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1003 | nfsd4_free_slab(&stateid_slab); |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1004 | nfsd4_free_slab(&deleg_slab); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1005 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | |
| 1007 | static int |
| 1008 | nfsd4_init_slabs(void) |
| 1009 | { |
| 1010 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", |
| 1011 | sizeof(struct nfs4_stateowner), 0, 0, NULL, NULL); |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1012 | if (stateowner_slab == NULL) |
| 1013 | goto out_nomem; |
| 1014 | file_slab = kmem_cache_create("nfsd4_files", |
| 1015 | sizeof(struct nfs4_file), 0, 0, NULL, NULL); |
| 1016 | if (file_slab == NULL) |
| 1017 | goto out_nomem; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1018 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
| 1019 | sizeof(struct nfs4_stateid), 0, 0, NULL, NULL); |
| 1020 | if (stateid_slab == NULL) |
| 1021 | goto out_nomem; |
NeilBrown | 5b2d21c | 2005-06-23 22:03:04 -0700 | [diff] [blame] | 1022 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
| 1023 | sizeof(struct nfs4_delegation), 0, 0, NULL, NULL); |
| 1024 | if (deleg_slab == NULL) |
| 1025 | goto out_nomem; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1026 | return 0; |
NeilBrown | e60d439 | 2005-06-23 22:03:01 -0700 | [diff] [blame] | 1027 | out_nomem: |
| 1028 | nfsd4_free_slabs(); |
| 1029 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); |
| 1030 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | } |
| 1032 | |
| 1033 | void |
| 1034 | nfs4_free_stateowner(struct kref *kref) |
| 1035 | { |
| 1036 | struct nfs4_stateowner *sop = |
| 1037 | container_of(kref, struct nfs4_stateowner, so_ref); |
| 1038 | kfree(sop->so_owner.data); |
| 1039 | kmem_cache_free(stateowner_slab, sop); |
| 1040 | } |
| 1041 | |
| 1042 | static inline struct nfs4_stateowner * |
| 1043 | alloc_stateowner(struct xdr_netobj *owner) |
| 1044 | { |
| 1045 | struct nfs4_stateowner *sop; |
| 1046 | |
| 1047 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { |
| 1048 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { |
| 1049 | memcpy(sop->so_owner.data, owner->data, owner->len); |
| 1050 | sop->so_owner.len = owner->len; |
| 1051 | kref_init(&sop->so_ref); |
| 1052 | return sop; |
| 1053 | } |
| 1054 | kmem_cache_free(stateowner_slab, sop); |
| 1055 | } |
| 1056 | return NULL; |
| 1057 | } |
| 1058 | |
| 1059 | static struct nfs4_stateowner * |
| 1060 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { |
| 1061 | struct nfs4_stateowner *sop; |
| 1062 | struct nfs4_replay *rp; |
| 1063 | unsigned int idhashval; |
| 1064 | |
| 1065 | if (!(sop = alloc_stateowner(&open->op_owner))) |
| 1066 | return NULL; |
| 1067 | idhashval = ownerid_hashval(current_ownerid); |
| 1068 | INIT_LIST_HEAD(&sop->so_idhash); |
| 1069 | INIT_LIST_HEAD(&sop->so_strhash); |
| 1070 | INIT_LIST_HEAD(&sop->so_perclient); |
| 1071 | INIT_LIST_HEAD(&sop->so_perfilestate); |
| 1072 | INIT_LIST_HEAD(&sop->so_perlockowner); /* not used */ |
| 1073 | INIT_LIST_HEAD(&sop->so_close_lru); |
| 1074 | sop->so_time = 0; |
| 1075 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); |
| 1076 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); |
| 1077 | list_add(&sop->so_perclient, &clp->cl_perclient); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1078 | sop->so_is_open_owner = 1; |
| 1079 | sop->so_id = current_ownerid++; |
| 1080 | sop->so_client = clp; |
| 1081 | sop->so_seqid = open->op_seqid; |
| 1082 | sop->so_confirmed = 0; |
| 1083 | rp = &sop->so_replay; |
| 1084 | rp->rp_status = NFSERR_SERVERFAULT; |
| 1085 | rp->rp_buflen = 0; |
| 1086 | rp->rp_buf = rp->rp_ibuf; |
| 1087 | return sop; |
| 1088 | } |
| 1089 | |
| 1090 | static void |
| 1091 | release_stateid_lockowners(struct nfs4_stateid *open_stp) |
| 1092 | { |
| 1093 | struct nfs4_stateowner *lock_sop; |
| 1094 | |
| 1095 | while (!list_empty(&open_stp->st_perlockowner)) { |
| 1096 | lock_sop = list_entry(open_stp->st_perlockowner.next, |
| 1097 | struct nfs4_stateowner, so_perlockowner); |
| 1098 | /* list_del(&open_stp->st_perlockowner); */ |
| 1099 | BUG_ON(lock_sop->so_is_open_owner); |
| 1100 | release_stateowner(lock_sop); |
| 1101 | } |
| 1102 | } |
| 1103 | |
| 1104 | static void |
| 1105 | unhash_stateowner(struct nfs4_stateowner *sop) |
| 1106 | { |
| 1107 | struct nfs4_stateid *stp; |
| 1108 | |
| 1109 | list_del(&sop->so_idhash); |
| 1110 | list_del(&sop->so_strhash); |
NeilBrown | 6fa305d | 2005-06-23 22:03:06 -0700 | [diff] [blame] | 1111 | if (sop->so_is_open_owner) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1112 | list_del(&sop->so_perclient); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | list_del(&sop->so_perlockowner); |
| 1114 | while (!list_empty(&sop->so_perfilestate)) { |
| 1115 | stp = list_entry(sop->so_perfilestate.next, |
| 1116 | struct nfs4_stateid, st_perfilestate); |
| 1117 | if (sop->so_is_open_owner) |
| 1118 | release_stateid(stp, OPEN_STATE); |
| 1119 | else |
| 1120 | release_stateid(stp, LOCK_STATE); |
| 1121 | } |
| 1122 | } |
| 1123 | |
| 1124 | static void |
| 1125 | release_stateowner(struct nfs4_stateowner *sop) |
| 1126 | { |
| 1127 | unhash_stateowner(sop); |
| 1128 | list_del(&sop->so_close_lru); |
| 1129 | nfs4_put_stateowner(sop); |
| 1130 | } |
| 1131 | |
| 1132 | static inline void |
| 1133 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { |
| 1134 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1135 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 1136 | |
| 1137 | INIT_LIST_HEAD(&stp->st_hash); |
| 1138 | INIT_LIST_HEAD(&stp->st_perfilestate); |
| 1139 | INIT_LIST_HEAD(&stp->st_perlockowner); |
| 1140 | INIT_LIST_HEAD(&stp->st_perfile); |
| 1141 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); |
| 1142 | list_add(&stp->st_perfilestate, &sop->so_perfilestate); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1143 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1144 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1145 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1146 | stp->st_file = fp; |
| 1147 | stp->st_stateid.si_boot = boot_time; |
| 1148 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 1149 | stp->st_stateid.si_fileid = fp->fi_id; |
| 1150 | stp->st_stateid.si_generation = 0; |
| 1151 | stp->st_access_bmap = 0; |
| 1152 | stp->st_deny_bmap = 0; |
| 1153 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1154 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
| 1155 | } |
| 1156 | |
| 1157 | static void |
| 1158 | release_stateid(struct nfs4_stateid *stp, int flags) |
| 1159 | { |
| 1160 | struct file *filp = stp->st_vfs_file; |
| 1161 | |
| 1162 | list_del(&stp->st_hash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | list_del(&stp->st_perfile); |
| 1164 | list_del(&stp->st_perfilestate); |
| 1165 | if (flags & OPEN_STATE) { |
| 1166 | release_stateid_lockowners(stp); |
| 1167 | stp->st_vfs_file = NULL; |
| 1168 | nfsd_close(filp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | } else if (flags & LOCK_STATE) |
| 1170 | locks_remove_posix(filp, (fl_owner_t) stp->st_stateowner); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1171 | put_nfs4_file(stp->st_file); |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1172 | kmem_cache_free(stateid_slab, stp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | stp = NULL; |
| 1174 | } |
| 1175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | void |
| 1177 | move_to_close_lru(struct nfs4_stateowner *sop) |
| 1178 | { |
| 1179 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); |
| 1180 | |
| 1181 | unhash_stateowner(sop); |
| 1182 | list_add_tail(&sop->so_close_lru, &close_lru); |
| 1183 | sop->so_time = get_seconds(); |
| 1184 | } |
| 1185 | |
| 1186 | void |
| 1187 | release_state_owner(struct nfs4_stateid *stp, int flag) |
| 1188 | { |
| 1189 | struct nfs4_stateowner *sop = stp->st_stateowner; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1190 | |
| 1191 | dprintk("NFSD: release_state_owner\n"); |
| 1192 | release_stateid(stp, flag); |
| 1193 | |
| 1194 | /* place unused nfs4_stateowners on so_close_lru list to be |
| 1195 | * released by the laundromat service after the lease period |
| 1196 | * to enable us to handle CLOSE replay |
| 1197 | */ |
| 1198 | if (sop->so_confirmed && list_empty(&sop->so_perfilestate)) |
| 1199 | move_to_close_lru(sop); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1200 | } |
| 1201 | |
| 1202 | static int |
| 1203 | cmp_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, clientid_t *clid) { |
| 1204 | return ((sop->so_owner.len == owner->len) && |
| 1205 | !memcmp(sop->so_owner.data, owner->data, owner->len) && |
| 1206 | (sop->so_client->cl_clientid.cl_id == clid->cl_id)); |
| 1207 | } |
| 1208 | |
| 1209 | static struct nfs4_stateowner * |
| 1210 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) |
| 1211 | { |
| 1212 | struct nfs4_stateowner *so = NULL; |
| 1213 | |
| 1214 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { |
| 1215 | if (cmp_owner_str(so, &open->op_owner, &open->op_clientid)) |
| 1216 | return so; |
| 1217 | } |
| 1218 | return NULL; |
| 1219 | } |
| 1220 | |
| 1221 | /* search file_hashtbl[] for file */ |
| 1222 | static struct nfs4_file * |
| 1223 | find_file(struct inode *ino) |
| 1224 | { |
| 1225 | unsigned int hashval = file_hashval(ino); |
| 1226 | struct nfs4_file *fp; |
| 1227 | |
| 1228 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1229 | if (fp->fi_inode == ino) { |
| 1230 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | return fp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1232 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1233 | } |
| 1234 | return NULL; |
| 1235 | } |
| 1236 | |
| 1237 | #define TEST_ACCESS(x) ((x > 0 || x < 4)?1:0) |
| 1238 | #define TEST_DENY(x) ((x >= 0 || x < 5)?1:0) |
| 1239 | |
| 1240 | void |
| 1241 | set_access(unsigned int *access, unsigned long bmap) { |
| 1242 | int i; |
| 1243 | |
| 1244 | *access = 0; |
| 1245 | for (i = 1; i < 4; i++) { |
| 1246 | if (test_bit(i, &bmap)) |
| 1247 | *access |= i; |
| 1248 | } |
| 1249 | } |
| 1250 | |
| 1251 | void |
| 1252 | set_deny(unsigned int *deny, unsigned long bmap) { |
| 1253 | int i; |
| 1254 | |
| 1255 | *deny = 0; |
| 1256 | for (i = 0; i < 4; i++) { |
| 1257 | if (test_bit(i, &bmap)) |
| 1258 | *deny |= i ; |
| 1259 | } |
| 1260 | } |
| 1261 | |
| 1262 | static int |
| 1263 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { |
| 1264 | unsigned int access, deny; |
| 1265 | |
| 1266 | set_access(&access, stp->st_access_bmap); |
| 1267 | set_deny(&deny, stp->st_deny_bmap); |
| 1268 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) |
| 1269 | return 0; |
| 1270 | return 1; |
| 1271 | } |
| 1272 | |
| 1273 | /* |
| 1274 | * Called to check deny when READ with all zero stateid or |
| 1275 | * WRITE with all zero or all one stateid |
| 1276 | */ |
| 1277 | int |
| 1278 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
| 1279 | { |
| 1280 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1281 | struct nfs4_file *fp; |
| 1282 | struct nfs4_stateid *stp; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1283 | int ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | dprintk("NFSD: nfs4_share_conflict\n"); |
| 1286 | |
| 1287 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1288 | if (!fp) |
| 1289 | return nfs_ok; |
| 1290 | ret = nfserr_share_denied; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | /* Search for conflicting share reservations */ |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1292 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
| 1293 | if (test_bit(deny_type, &stp->st_deny_bmap) || |
| 1294 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) |
| 1295 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | } |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1297 | ret = nfs_ok; |
| 1298 | out: |
| 1299 | put_nfs4_file(fp); |
| 1300 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | } |
| 1302 | |
| 1303 | static inline void |
| 1304 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) |
| 1305 | { |
| 1306 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { |
| 1307 | put_write_access(filp->f_dentry->d_inode); |
| 1308 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | /* |
| 1313 | * Recall a delegation |
| 1314 | */ |
| 1315 | static int |
| 1316 | do_recall(void *__dp) |
| 1317 | { |
| 1318 | struct nfs4_delegation *dp = __dp; |
| 1319 | |
| 1320 | daemonize("nfsv4-recall"); |
| 1321 | |
| 1322 | nfsd4_cb_recall(dp); |
| 1323 | return 0; |
| 1324 | } |
| 1325 | |
| 1326 | /* |
| 1327 | * Spawn a thread to perform a recall on the delegation represented |
| 1328 | * by the lease (file_lock) |
| 1329 | * |
| 1330 | * Called from break_lease() with lock_kernel() held. |
| 1331 | * Note: we assume break_lease will only call this *once* for any given |
| 1332 | * lease. |
| 1333 | */ |
| 1334 | static |
| 1335 | void nfsd_break_deleg_cb(struct file_lock *fl) |
| 1336 | { |
| 1337 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; |
| 1338 | struct task_struct *t; |
| 1339 | |
| 1340 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); |
| 1341 | if (!dp) |
| 1342 | return; |
| 1343 | |
| 1344 | /* We're assuming the state code never drops its reference |
| 1345 | * without first removing the lease. Since we're in this lease |
| 1346 | * callback (and since the lease code is serialized by the kernel |
| 1347 | * lock) we know the server hasn't removed the lease yet, we know |
| 1348 | * it's safe to take a reference: */ |
| 1349 | atomic_inc(&dp->dl_count); |
| 1350 | |
| 1351 | spin_lock(&recall_lock); |
| 1352 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); |
| 1353 | spin_unlock(&recall_lock); |
| 1354 | |
| 1355 | /* only place dl_time is set. protected by lock_kernel*/ |
| 1356 | dp->dl_time = get_seconds(); |
| 1357 | |
| 1358 | /* XXX need to merge NFSD_LEASE_TIME with fs/locks.c:lease_break_time */ |
| 1359 | fl->fl_break_time = jiffies + NFSD_LEASE_TIME * HZ; |
| 1360 | |
| 1361 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); |
| 1362 | if (IS_ERR(t)) { |
| 1363 | struct nfs4_client *clp = dp->dl_client; |
| 1364 | |
| 1365 | printk(KERN_INFO "NFSD: Callback thread failed for " |
| 1366 | "for client (clientid %08x/%08x)\n", |
| 1367 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); |
| 1368 | nfs4_put_delegation(dp); |
| 1369 | } |
| 1370 | } |
| 1371 | |
| 1372 | /* |
| 1373 | * The file_lock is being reapd. |
| 1374 | * |
| 1375 | * Called by locks_free_lock() with lock_kernel() held. |
| 1376 | */ |
| 1377 | static |
| 1378 | void nfsd_release_deleg_cb(struct file_lock *fl) |
| 1379 | { |
| 1380 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
| 1381 | |
| 1382 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); |
| 1383 | |
| 1384 | if (!(fl->fl_flags & FL_LEASE) || !dp) |
| 1385 | return; |
| 1386 | dp->dl_flock = NULL; |
| 1387 | } |
| 1388 | |
| 1389 | /* |
| 1390 | * Set the delegation file_lock back pointer. |
| 1391 | * |
| 1392 | * Called from __setlease() with lock_kernel() held. |
| 1393 | */ |
| 1394 | static |
| 1395 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) |
| 1396 | { |
| 1397 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; |
| 1398 | |
| 1399 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); |
| 1400 | if (!dp) |
| 1401 | return; |
| 1402 | dp->dl_flock = new; |
| 1403 | } |
| 1404 | |
| 1405 | /* |
| 1406 | * Called from __setlease() with lock_kernel() held |
| 1407 | */ |
| 1408 | static |
| 1409 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) |
| 1410 | { |
| 1411 | struct nfs4_delegation *onlistd = |
| 1412 | (struct nfs4_delegation *)onlist->fl_owner; |
| 1413 | struct nfs4_delegation *tryd = |
| 1414 | (struct nfs4_delegation *)try->fl_owner; |
| 1415 | |
| 1416 | if (onlist->fl_lmops != try->fl_lmops) |
| 1417 | return 0; |
| 1418 | |
| 1419 | return onlistd->dl_client == tryd->dl_client; |
| 1420 | } |
| 1421 | |
| 1422 | |
| 1423 | static |
| 1424 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) |
| 1425 | { |
| 1426 | if (arg & F_UNLCK) |
| 1427 | return lease_modify(onlist, arg); |
| 1428 | else |
| 1429 | return -EAGAIN; |
| 1430 | } |
| 1431 | |
| 1432 | struct lock_manager_operations nfsd_lease_mng_ops = { |
| 1433 | .fl_break = nfsd_break_deleg_cb, |
| 1434 | .fl_release_private = nfsd_release_deleg_cb, |
| 1435 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, |
| 1436 | .fl_mylease = nfsd_same_client_deleg_cb, |
| 1437 | .fl_change = nfsd_change_deleg_cb, |
| 1438 | }; |
| 1439 | |
| 1440 | |
| 1441 | /* |
| 1442 | * nfsd4_process_open1() |
| 1443 | * lookup stateowner. |
| 1444 | * found: |
| 1445 | * check confirmed |
| 1446 | * confirmed: |
| 1447 | * check seqid |
| 1448 | * not confirmed: |
| 1449 | * delete owner |
| 1450 | * create new owner |
| 1451 | * notfound: |
| 1452 | * verify clientid |
| 1453 | * create new owner |
| 1454 | * |
| 1455 | * called with nfs4_lock_state() held. |
| 1456 | */ |
| 1457 | int |
| 1458 | nfsd4_process_open1(struct nfsd4_open *open) |
| 1459 | { |
| 1460 | int status; |
| 1461 | clientid_t *clientid = &open->op_clientid; |
| 1462 | struct nfs4_client *clp = NULL; |
| 1463 | unsigned int strhashval; |
| 1464 | struct nfs4_stateowner *sop = NULL; |
| 1465 | |
| 1466 | status = nfserr_inval; |
| 1467 | if (!check_name(open->op_owner)) |
| 1468 | goto out; |
| 1469 | |
| 1470 | if (STALE_CLIENTID(&open->op_clientid)) |
| 1471 | return nfserr_stale_clientid; |
| 1472 | |
| 1473 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); |
| 1474 | sop = find_openstateowner_str(strhashval, open); |
| 1475 | if (sop) { |
| 1476 | open->op_stateowner = sop; |
| 1477 | /* check for replay */ |
| 1478 | if (open->op_seqid == sop->so_seqid){ |
| 1479 | if (sop->so_replay.rp_buflen) |
| 1480 | return NFSERR_REPLAY_ME; |
| 1481 | else { |
| 1482 | /* The original OPEN failed so spectacularly |
| 1483 | * that we don't even have replay data saved! |
| 1484 | * Therefore, we have no choice but to continue |
| 1485 | * processing this OPEN; presumably, we'll |
| 1486 | * fail again for the same reason. |
| 1487 | */ |
| 1488 | dprintk("nfsd4_process_open1:" |
| 1489 | " replay with no replay cache\n"); |
| 1490 | goto renew; |
| 1491 | } |
| 1492 | } else if (sop->so_confirmed) { |
| 1493 | if (open->op_seqid == sop->so_seqid + 1) |
| 1494 | goto renew; |
| 1495 | status = nfserr_bad_seqid; |
| 1496 | goto out; |
| 1497 | } else { |
| 1498 | /* If we get here, we received an OPEN for an |
| 1499 | * unconfirmed nfs4_stateowner. Since the seqid's are |
| 1500 | * different, purge the existing nfs4_stateowner, and |
| 1501 | * instantiate a new one. |
| 1502 | */ |
| 1503 | clp = sop->so_client; |
| 1504 | release_stateowner(sop); |
| 1505 | } |
| 1506 | } else { |
| 1507 | /* nfs4_stateowner not found. |
| 1508 | * Verify clientid and instantiate new nfs4_stateowner. |
| 1509 | * If verify fails this is presumably the result of the |
| 1510 | * client's lease expiring. |
| 1511 | */ |
| 1512 | status = nfserr_expired; |
| 1513 | clp = find_confirmed_client(clientid); |
| 1514 | if (clp == NULL) |
| 1515 | goto out; |
| 1516 | } |
| 1517 | status = nfserr_resource; |
| 1518 | sop = alloc_init_open_stateowner(strhashval, clp, open); |
| 1519 | if (sop == NULL) |
| 1520 | goto out; |
| 1521 | open->op_stateowner = sop; |
| 1522 | renew: |
| 1523 | status = nfs_ok; |
| 1524 | renew_client(sop->so_client); |
| 1525 | out: |
| 1526 | if (status && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
| 1527 | status = nfserr_reclaim_bad; |
| 1528 | return status; |
| 1529 | } |
| 1530 | |
NeilBrown | 4a6e43e | 2005-06-23 22:02:50 -0700 | [diff] [blame] | 1531 | static inline int |
| 1532 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
| 1533 | { |
| 1534 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) |
| 1535 | return nfserr_openmode; |
| 1536 | else |
| 1537 | return nfs_ok; |
| 1538 | } |
| 1539 | |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1540 | static struct nfs4_delegation * |
| 1541 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) |
| 1542 | { |
| 1543 | struct nfs4_delegation *dp; |
| 1544 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1545 | list_for_each_entry(dp, &fp->fi_delegations, dl_del_perfile) { |
NeilBrown | 52f4fb4 | 2005-06-23 22:02:49 -0700 | [diff] [blame] | 1546 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
| 1547 | return dp; |
| 1548 | } |
| 1549 | return NULL; |
| 1550 | } |
| 1551 | |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1552 | static int |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1553 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
| 1554 | struct nfs4_delegation **dp) |
| 1555 | { |
| 1556 | int flags; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1557 | int status = nfserr_bad_stateid; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1558 | |
| 1559 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); |
| 1560 | if (*dp == NULL) |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1561 | goto out; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1562 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
| 1563 | RD_STATE : WR_STATE; |
| 1564 | status = nfs4_check_delegmode(*dp, flags); |
| 1565 | if (status) |
| 1566 | *dp = NULL; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1567 | out: |
| 1568 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1569 | return nfs_ok; |
| 1570 | if (status) |
| 1571 | return status; |
| 1572 | open->op_stateowner->so_confirmed = 1; |
| 1573 | return nfs_ok; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1574 | } |
| 1575 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1576 | static int |
| 1577 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
| 1578 | { |
| 1579 | struct nfs4_stateid *local; |
| 1580 | int status = nfserr_share_denied; |
| 1581 | struct nfs4_stateowner *sop = open->op_stateowner; |
| 1582 | |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 1583 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1584 | /* ignore lock owners */ |
| 1585 | if (local->st_stateowner->so_is_open_owner == 0) |
| 1586 | continue; |
| 1587 | /* remember if we have seen this open owner */ |
| 1588 | if (local->st_stateowner == sop) |
| 1589 | *stpp = local; |
| 1590 | /* check for conflicting share reservations */ |
| 1591 | if (!test_share(local, open)) |
| 1592 | goto out; |
| 1593 | } |
| 1594 | status = 0; |
| 1595 | out: |
| 1596 | return status; |
| 1597 | } |
| 1598 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1599 | static inline struct nfs4_stateid * |
| 1600 | nfs4_alloc_stateid(void) |
| 1601 | { |
| 1602 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); |
| 1603 | } |
| 1604 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | static int |
| 1606 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1607 | struct nfs4_delegation *dp, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1608 | struct svc_fh *cur_fh, int flags) |
| 1609 | { |
| 1610 | struct nfs4_stateid *stp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1612 | stp = nfs4_alloc_stateid(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | if (stp == NULL) |
| 1614 | return nfserr_resource; |
| 1615 | |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1616 | if (dp) { |
| 1617 | get_file(dp->dl_vfs_file); |
| 1618 | stp->st_vfs_file = dp->dl_vfs_file; |
| 1619 | } else { |
| 1620 | int status; |
| 1621 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
| 1622 | &stp->st_vfs_file); |
| 1623 | if (status) { |
| 1624 | if (status == nfserr_dropit) |
| 1625 | status = nfserr_jukebox; |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 1626 | kmem_cache_free(stateid_slab, stp); |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1627 | return status; |
| 1628 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1629 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1630 | *stpp = stp; |
| 1631 | return 0; |
| 1632 | } |
| 1633 | |
| 1634 | static inline int |
| 1635 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
| 1636 | struct nfsd4_open *open) |
| 1637 | { |
| 1638 | struct iattr iattr = { |
| 1639 | .ia_valid = ATTR_SIZE, |
| 1640 | .ia_size = 0, |
| 1641 | }; |
| 1642 | if (!open->op_truncate) |
| 1643 | return 0; |
| 1644 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) |
| 1645 | return -EINVAL; |
| 1646 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
| 1647 | } |
| 1648 | |
| 1649 | static int |
| 1650 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
| 1651 | { |
| 1652 | struct file *filp = stp->st_vfs_file; |
| 1653 | struct inode *inode = filp->f_dentry->d_inode; |
| 1654 | unsigned int share_access; |
| 1655 | int status; |
| 1656 | |
| 1657 | set_access(&share_access, stp->st_access_bmap); |
| 1658 | share_access = ~share_access; |
| 1659 | share_access &= open->op_share_access; |
| 1660 | |
| 1661 | if (!(share_access & NFS4_SHARE_ACCESS_WRITE)) |
| 1662 | return nfsd4_truncate(rqstp, cur_fh, open); |
| 1663 | |
| 1664 | status = get_write_access(inode); |
| 1665 | if (status) |
| 1666 | return nfserrno(status); |
| 1667 | status = nfsd4_truncate(rqstp, cur_fh, open); |
| 1668 | if (status) { |
| 1669 | put_write_access(inode); |
| 1670 | return status; |
| 1671 | } |
| 1672 | /* remember the open */ |
| 1673 | filp->f_mode = (filp->f_mode | FMODE_WRITE) & ~FMODE_READ; |
| 1674 | set_bit(open->op_share_access, &stp->st_access_bmap); |
| 1675 | set_bit(open->op_share_deny, &stp->st_deny_bmap); |
| 1676 | |
| 1677 | return nfs_ok; |
| 1678 | } |
| 1679 | |
| 1680 | |
| 1681 | /* decrement seqid on successful reclaim, it will be bumped in encode_open */ |
| 1682 | static void |
| 1683 | nfs4_set_claim_prev(struct nfsd4_open *open, int *status) |
| 1684 | { |
| 1685 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) { |
| 1686 | if (*status) |
| 1687 | *status = nfserr_reclaim_bad; |
| 1688 | else { |
| 1689 | open->op_stateowner->so_confirmed = 1; |
| 1690 | open->op_stateowner->so_seqid--; |
| 1691 | } |
| 1692 | } |
| 1693 | } |
| 1694 | |
| 1695 | /* |
| 1696 | * Attempt to hand out a delegation. |
| 1697 | */ |
| 1698 | static void |
| 1699 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) |
| 1700 | { |
| 1701 | struct nfs4_delegation *dp; |
| 1702 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 1703 | struct nfs4_callback *cb = &sop->so_client->cl_callback; |
| 1704 | struct file_lock fl, *flp = &fl; |
| 1705 | int status, flag = 0; |
| 1706 | |
| 1707 | flag = NFS4_OPEN_DELEGATE_NONE; |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1708 | open->op_recall = 0; |
| 1709 | switch (open->op_claim_type) { |
| 1710 | case NFS4_OPEN_CLAIM_PREVIOUS: |
| 1711 | if (!atomic_read(&cb->cb_set)) |
| 1712 | open->op_recall = 1; |
| 1713 | flag = open->op_delegate_type; |
| 1714 | if (flag == NFS4_OPEN_DELEGATE_NONE) |
| 1715 | goto out; |
| 1716 | break; |
| 1717 | case NFS4_OPEN_CLAIM_NULL: |
| 1718 | /* Let's not give out any delegations till everyone's |
| 1719 | * had the chance to reclaim theirs.... */ |
| 1720 | if (nfs4_in_grace()) |
| 1721 | goto out; |
| 1722 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) |
| 1723 | goto out; |
| 1724 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1725 | flag = NFS4_OPEN_DELEGATE_WRITE; |
| 1726 | else |
| 1727 | flag = NFS4_OPEN_DELEGATE_READ; |
| 1728 | break; |
| 1729 | default: |
| 1730 | goto out; |
| 1731 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1732 | |
| 1733 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); |
| 1734 | if (dp == NULL) { |
| 1735 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1736 | goto out; |
| 1737 | } |
| 1738 | locks_init_lock(&fl); |
| 1739 | fl.fl_lmops = &nfsd_lease_mng_ops; |
| 1740 | fl.fl_flags = FL_LEASE; |
| 1741 | fl.fl_end = OFFSET_MAX; |
| 1742 | fl.fl_owner = (fl_owner_t)dp; |
| 1743 | fl.fl_file = stp->st_vfs_file; |
| 1744 | fl.fl_pid = current->tgid; |
| 1745 | |
| 1746 | /* setlease checks to see if delegation should be handed out. |
| 1747 | * the lock_manager callbacks fl_mylease and fl_change are used |
| 1748 | */ |
| 1749 | if ((status = setlease(stp->st_vfs_file, |
| 1750 | flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK, &flp))) { |
| 1751 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
NeilBrown | c907132 | 2005-04-16 15:26:38 -0700 | [diff] [blame] | 1752 | unhash_delegation(dp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1753 | flag = NFS4_OPEN_DELEGATE_NONE; |
| 1754 | goto out; |
| 1755 | } |
| 1756 | |
| 1757 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); |
| 1758 | |
| 1759 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", |
| 1760 | dp->dl_stateid.si_boot, |
| 1761 | dp->dl_stateid.si_stateownerid, |
| 1762 | dp->dl_stateid.si_fileid, |
| 1763 | dp->dl_stateid.si_generation); |
| 1764 | out: |
NeilBrown | 7b190fe | 2005-06-23 22:03:23 -0700 | [diff] [blame] | 1765 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
| 1766 | && flag == NFS4_OPEN_DELEGATE_NONE |
| 1767 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) |
| 1768 | printk("NFSD: WARNING: refusing delegation reclaim\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1769 | open->op_delegate_type = flag; |
| 1770 | } |
| 1771 | |
| 1772 | /* |
| 1773 | * called with nfs4_lock_state() held. |
| 1774 | */ |
| 1775 | int |
| 1776 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
| 1777 | { |
| 1778 | struct nfs4_file *fp = NULL; |
| 1779 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 1780 | struct nfs4_stateid *stp = NULL; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1781 | struct nfs4_delegation *dp = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1782 | int status; |
| 1783 | |
| 1784 | status = nfserr_inval; |
| 1785 | if (!TEST_ACCESS(open->op_share_access) || !TEST_DENY(open->op_share_deny)) |
| 1786 | goto out; |
| 1787 | /* |
| 1788 | * Lookup file; if found, lookup stateid and check open request, |
| 1789 | * and check for delegations in the process of being recalled. |
| 1790 | * If not found, create the nfs4_file struct |
| 1791 | */ |
| 1792 | fp = find_file(ino); |
| 1793 | if (fp) { |
| 1794 | if ((status = nfs4_check_open(fp, open, &stp))) |
| 1795 | goto out; |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1796 | status = nfs4_check_deleg(fp, open, &dp); |
| 1797 | if (status) |
| 1798 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1799 | } else { |
NeilBrown | c44c5ee | 2005-06-23 22:02:54 -0700 | [diff] [blame] | 1800 | status = nfserr_bad_stateid; |
| 1801 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) |
| 1802 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1803 | status = nfserr_resource; |
| 1804 | fp = alloc_init_file(ino); |
| 1805 | if (fp == NULL) |
| 1806 | goto out; |
| 1807 | } |
| 1808 | |
| 1809 | /* |
| 1810 | * OPEN the file, or upgrade an existing OPEN. |
| 1811 | * If truncate fails, the OPEN fails. |
| 1812 | */ |
| 1813 | if (stp) { |
| 1814 | /* Stateid was found, this is an OPEN upgrade */ |
| 1815 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); |
| 1816 | if (status) |
| 1817 | goto out; |
| 1818 | } else { |
| 1819 | /* Stateid was not found, this is a new OPEN */ |
| 1820 | int flags = 0; |
| 1821 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
| 1822 | flags = MAY_WRITE; |
| 1823 | else |
| 1824 | flags = MAY_READ; |
NeilBrown | 567d982 | 2005-06-23 22:02:53 -0700 | [diff] [blame] | 1825 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
| 1826 | if (status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1827 | goto out; |
| 1828 | init_stateid(stp, fp, open); |
| 1829 | status = nfsd4_truncate(rqstp, current_fh, open); |
| 1830 | if (status) { |
| 1831 | release_stateid(stp, OPEN_STATE); |
| 1832 | goto out; |
| 1833 | } |
| 1834 | } |
| 1835 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 1836 | |
| 1837 | /* |
| 1838 | * Attempt to hand out a delegation. No error return, because the |
| 1839 | * OPEN succeeds even if we fail. |
| 1840 | */ |
| 1841 | nfs4_open_delegation(current_fh, open, stp); |
| 1842 | |
| 1843 | status = nfs_ok; |
| 1844 | |
| 1845 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", |
| 1846 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, |
| 1847 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); |
| 1848 | out: |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 1849 | if (fp) |
| 1850 | put_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1851 | /* CLAIM_PREVIOUS has different error returns */ |
| 1852 | nfs4_set_claim_prev(open, &status); |
| 1853 | /* |
| 1854 | * To finish the open response, we just need to set the rflags. |
| 1855 | */ |
| 1856 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; |
| 1857 | if (!open->op_stateowner->so_confirmed) |
| 1858 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
| 1859 | |
| 1860 | return status; |
| 1861 | } |
| 1862 | |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1863 | static struct workqueue_struct *laundry_wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | static struct work_struct laundromat_work; |
| 1865 | static void laundromat_main(void *); |
| 1866 | static DECLARE_WORK(laundromat_work, laundromat_main, NULL); |
| 1867 | |
| 1868 | int |
| 1869 | nfsd4_renew(clientid_t *clid) |
| 1870 | { |
| 1871 | struct nfs4_client *clp; |
| 1872 | int status; |
| 1873 | |
| 1874 | nfs4_lock_state(); |
| 1875 | dprintk("process_renew(%08x/%08x): starting\n", |
| 1876 | clid->cl_boot, clid->cl_id); |
| 1877 | status = nfserr_stale_clientid; |
| 1878 | if (STALE_CLIENTID(clid)) |
| 1879 | goto out; |
| 1880 | clp = find_confirmed_client(clid); |
| 1881 | status = nfserr_expired; |
| 1882 | if (clp == NULL) { |
| 1883 | /* We assume the client took too long to RENEW. */ |
| 1884 | dprintk("nfsd4_renew: clientid not found!\n"); |
| 1885 | goto out; |
| 1886 | } |
| 1887 | renew_client(clp); |
| 1888 | status = nfserr_cb_path_down; |
| 1889 | if (!list_empty(&clp->cl_del_perclnt) |
| 1890 | && !atomic_read(&clp->cl_callback.cb_set)) |
| 1891 | goto out; |
| 1892 | status = nfs_ok; |
| 1893 | out: |
| 1894 | nfs4_unlock_state(); |
| 1895 | return status; |
| 1896 | } |
| 1897 | |
| 1898 | time_t |
| 1899 | nfs4_laundromat(void) |
| 1900 | { |
| 1901 | struct nfs4_client *clp; |
| 1902 | struct nfs4_stateowner *sop; |
| 1903 | struct nfs4_delegation *dp; |
| 1904 | struct list_head *pos, *next, reaplist; |
| 1905 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; |
| 1906 | time_t t, clientid_val = NFSD_LEASE_TIME; |
| 1907 | time_t u, test_val = NFSD_LEASE_TIME; |
| 1908 | |
| 1909 | nfs4_lock_state(); |
| 1910 | |
| 1911 | dprintk("NFSD: laundromat service - starting\n"); |
| 1912 | list_for_each_safe(pos, next, &client_lru) { |
| 1913 | clp = list_entry(pos, struct nfs4_client, cl_lru); |
| 1914 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { |
| 1915 | t = clp->cl_time - cutoff; |
| 1916 | if (clientid_val > t) |
| 1917 | clientid_val = t; |
| 1918 | break; |
| 1919 | } |
| 1920 | dprintk("NFSD: purging unused client (clientid %08x)\n", |
| 1921 | clp->cl_clientid.cl_id); |
| 1922 | expire_client(clp); |
| 1923 | } |
| 1924 | INIT_LIST_HEAD(&reaplist); |
| 1925 | spin_lock(&recall_lock); |
| 1926 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 1927 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1928 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { |
| 1929 | u = dp->dl_time - cutoff; |
| 1930 | if (test_val > u) |
| 1931 | test_val = u; |
| 1932 | break; |
| 1933 | } |
| 1934 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", |
| 1935 | dp, dp->dl_flock); |
| 1936 | list_move(&dp->dl_recall_lru, &reaplist); |
| 1937 | } |
| 1938 | spin_unlock(&recall_lock); |
| 1939 | list_for_each_safe(pos, next, &reaplist) { |
| 1940 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 1941 | list_del_init(&dp->dl_recall_lru); |
| 1942 | unhash_delegation(dp); |
| 1943 | } |
| 1944 | test_val = NFSD_LEASE_TIME; |
| 1945 | list_for_each_safe(pos, next, &close_lru) { |
| 1946 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 1947 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { |
| 1948 | u = sop->so_time - cutoff; |
| 1949 | if (test_val > u) |
| 1950 | test_val = u; |
| 1951 | break; |
| 1952 | } |
| 1953 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", |
| 1954 | sop->so_id); |
| 1955 | list_del(&sop->so_close_lru); |
| 1956 | nfs4_put_stateowner(sop); |
| 1957 | } |
| 1958 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) |
| 1959 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; |
| 1960 | nfs4_unlock_state(); |
| 1961 | return clientid_val; |
| 1962 | } |
| 1963 | |
| 1964 | void |
| 1965 | laundromat_main(void *not_used) |
| 1966 | { |
| 1967 | time_t t; |
| 1968 | |
| 1969 | t = nfs4_laundromat(); |
| 1970 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 1971 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1972 | } |
| 1973 | |
| 1974 | /* search ownerid_hashtbl[] and close_lru for stateid owner |
| 1975 | * (stateid->si_stateownerid) |
| 1976 | */ |
| 1977 | struct nfs4_stateowner * |
| 1978 | find_openstateowner_id(u32 st_id, int flags) { |
| 1979 | struct nfs4_stateowner *local = NULL; |
| 1980 | |
| 1981 | dprintk("NFSD: find_openstateowner_id %d\n", st_id); |
| 1982 | if (flags & CLOSE_STATE) { |
| 1983 | list_for_each_entry(local, &close_lru, so_close_lru) { |
| 1984 | if (local->so_id == st_id) |
| 1985 | return local; |
| 1986 | } |
| 1987 | } |
| 1988 | return NULL; |
| 1989 | } |
| 1990 | |
| 1991 | static inline int |
| 1992 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) |
| 1993 | { |
| 1994 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_dentry->d_inode; |
| 1995 | } |
| 1996 | |
| 1997 | static int |
| 1998 | STALE_STATEID(stateid_t *stateid) |
| 1999 | { |
| 2000 | if (stateid->si_boot == boot_time) |
| 2001 | return 0; |
| 2002 | printk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
| 2003 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 2004 | stateid->si_generation); |
| 2005 | return 1; |
| 2006 | } |
| 2007 | |
| 2008 | static inline int |
| 2009 | access_permit_read(unsigned long access_bmap) |
| 2010 | { |
| 2011 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || |
| 2012 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || |
| 2013 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); |
| 2014 | } |
| 2015 | |
| 2016 | static inline int |
| 2017 | access_permit_write(unsigned long access_bmap) |
| 2018 | { |
| 2019 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || |
| 2020 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); |
| 2021 | } |
| 2022 | |
| 2023 | static |
| 2024 | int nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
| 2025 | { |
| 2026 | int status = nfserr_openmode; |
| 2027 | |
| 2028 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) |
| 2029 | goto out; |
| 2030 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) |
| 2031 | goto out; |
| 2032 | status = nfs_ok; |
| 2033 | out: |
| 2034 | return status; |
| 2035 | } |
| 2036 | |
| 2037 | static inline int |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
| 2039 | { |
| 2040 | /* Trying to call delegreturn with a special stateid? Yuch: */ |
| 2041 | if (!(flags & (RD_STATE | WR_STATE))) |
| 2042 | return nfserr_bad_stateid; |
| 2043 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
| 2044 | return nfs_ok; |
| 2045 | else if (nfs4_in_grace()) { |
| 2046 | /* Answer in remaining cases depends on existance of |
| 2047 | * conflicting state; so we must wait out the grace period. */ |
| 2048 | return nfserr_grace; |
| 2049 | } else if (flags & WR_STATE) |
| 2050 | return nfs4_share_conflict(current_fh, |
| 2051 | NFS4_SHARE_DENY_WRITE); |
| 2052 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ |
| 2053 | return nfs4_share_conflict(current_fh, |
| 2054 | NFS4_SHARE_DENY_READ); |
| 2055 | } |
| 2056 | |
| 2057 | /* |
| 2058 | * Allow READ/WRITE during grace period on recovered state only for files |
| 2059 | * that are not able to provide mandatory locking. |
| 2060 | */ |
| 2061 | static inline int |
| 2062 | io_during_grace_disallowed(struct inode *inode, int flags) |
| 2063 | { |
| 2064 | return nfs4_in_grace() && (flags & (RD_STATE | WR_STATE)) |
| 2065 | && MANDATORY_LOCK(inode); |
| 2066 | } |
| 2067 | |
| 2068 | /* |
| 2069 | * Checks for stateid operations |
| 2070 | */ |
| 2071 | int |
| 2072 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
| 2073 | { |
| 2074 | struct nfs4_stateid *stp = NULL; |
| 2075 | struct nfs4_delegation *dp = NULL; |
| 2076 | stateid_t *stidp; |
| 2077 | struct inode *ino = current_fh->fh_dentry->d_inode; |
| 2078 | int status; |
| 2079 | |
| 2080 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", |
| 2081 | stateid->si_boot, stateid->si_stateownerid, |
| 2082 | stateid->si_fileid, stateid->si_generation); |
| 2083 | if (filpp) |
| 2084 | *filpp = NULL; |
| 2085 | |
| 2086 | if (io_during_grace_disallowed(ino, flags)) |
| 2087 | return nfserr_grace; |
| 2088 | |
| 2089 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
| 2090 | return check_special_stateids(current_fh, stateid, flags); |
| 2091 | |
| 2092 | /* STALE STATEID */ |
| 2093 | status = nfserr_stale_stateid; |
| 2094 | if (STALE_STATEID(stateid)) |
| 2095 | goto out; |
| 2096 | |
| 2097 | /* BAD STATEID */ |
| 2098 | status = nfserr_bad_stateid; |
| 2099 | if (!stateid->si_fileid) { /* delegation stateid */ |
| 2100 | if(!(dp = find_delegation_stateid(ino, stateid))) { |
| 2101 | dprintk("NFSD: delegation stateid not found\n"); |
| 2102 | if (nfs4_in_grace()) |
| 2103 | status = nfserr_grace; |
| 2104 | goto out; |
| 2105 | } |
| 2106 | stidp = &dp->dl_stateid; |
| 2107 | } else { /* open or lock stateid */ |
| 2108 | if (!(stp = find_stateid(stateid, flags))) { |
| 2109 | dprintk("NFSD: open or lock stateid not found\n"); |
| 2110 | if (nfs4_in_grace()) |
| 2111 | status = nfserr_grace; |
| 2112 | goto out; |
| 2113 | } |
| 2114 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) |
| 2115 | goto out; |
| 2116 | if (!stp->st_stateowner->so_confirmed) |
| 2117 | goto out; |
| 2118 | stidp = &stp->st_stateid; |
| 2119 | } |
| 2120 | if (stateid->si_generation > stidp->si_generation) |
| 2121 | goto out; |
| 2122 | |
| 2123 | /* OLD STATEID */ |
| 2124 | status = nfserr_old_stateid; |
| 2125 | if (stateid->si_generation < stidp->si_generation) |
| 2126 | goto out; |
| 2127 | if (stp) { |
| 2128 | if ((status = nfs4_check_openmode(stp,flags))) |
| 2129 | goto out; |
| 2130 | renew_client(stp->st_stateowner->so_client); |
| 2131 | if (filpp) |
| 2132 | *filpp = stp->st_vfs_file; |
| 2133 | } else if (dp) { |
| 2134 | if ((status = nfs4_check_delegmode(dp, flags))) |
| 2135 | goto out; |
| 2136 | renew_client(dp->dl_client); |
| 2137 | if (flags & DELEG_RET) |
| 2138 | unhash_delegation(dp); |
| 2139 | if (filpp) |
| 2140 | *filpp = dp->dl_vfs_file; |
| 2141 | } |
| 2142 | status = nfs_ok; |
| 2143 | out: |
| 2144 | return status; |
| 2145 | } |
| 2146 | |
| 2147 | |
| 2148 | /* |
| 2149 | * Checks for sequence id mutating operations. |
| 2150 | */ |
| 2151 | int |
| 2152 | nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, clientid_t *lockclid) |
| 2153 | { |
| 2154 | int status; |
| 2155 | struct nfs4_stateid *stp; |
| 2156 | struct nfs4_stateowner *sop; |
| 2157 | |
| 2158 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " |
| 2159 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, |
| 2160 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
| 2161 | stateid->si_generation); |
| 2162 | |
| 2163 | *stpp = NULL; |
| 2164 | *sopp = NULL; |
| 2165 | |
| 2166 | status = nfserr_bad_stateid; |
| 2167 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
| 2168 | printk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
| 2169 | goto out; |
| 2170 | } |
| 2171 | |
| 2172 | status = nfserr_stale_stateid; |
| 2173 | if (STALE_STATEID(stateid)) |
| 2174 | goto out; |
| 2175 | /* |
| 2176 | * We return BAD_STATEID if filehandle doesn't match stateid, |
| 2177 | * the confirmed flag is incorrecly set, or the generation |
| 2178 | * number is incorrect. |
| 2179 | * If there is no entry in the openfile table for this id, |
| 2180 | * we can't always return BAD_STATEID; |
| 2181 | * this might be a retransmitted CLOSE which has arrived after |
| 2182 | * the openfile has been released. |
| 2183 | */ |
| 2184 | if (!(stp = find_stateid(stateid, flags))) |
| 2185 | goto no_nfs4_stateid; |
| 2186 | |
| 2187 | status = nfserr_bad_stateid; |
| 2188 | |
| 2189 | /* for new lock stateowners: |
| 2190 | * check that the lock->v.new.open_stateid |
| 2191 | * refers to an open stateowner |
| 2192 | * |
| 2193 | * check that the lockclid (nfs4_lock->v.new.clientid) is the same |
| 2194 | * as the open_stateid->st_stateowner->so_client->clientid |
| 2195 | */ |
| 2196 | if (lockclid) { |
| 2197 | struct nfs4_stateowner *sop = stp->st_stateowner; |
| 2198 | struct nfs4_client *clp = sop->so_client; |
| 2199 | |
| 2200 | if (!sop->so_is_open_owner) |
| 2201 | goto out; |
| 2202 | if (!cmp_clid(&clp->cl_clientid, lockclid)) |
| 2203 | goto out; |
| 2204 | } |
| 2205 | |
| 2206 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) { |
| 2207 | printk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
| 2208 | goto out; |
| 2209 | } |
| 2210 | |
| 2211 | *stpp = stp; |
| 2212 | *sopp = sop = stp->st_stateowner; |
| 2213 | |
| 2214 | /* |
| 2215 | * We now validate the seqid and stateid generation numbers. |
| 2216 | * For the moment, we ignore the possibility of |
| 2217 | * generation number wraparound. |
| 2218 | */ |
| 2219 | if (seqid != sop->so_seqid + 1) |
| 2220 | goto check_replay; |
| 2221 | |
| 2222 | if (sop->so_confirmed) { |
| 2223 | if (flags & CONFIRM) { |
| 2224 | printk("NFSD: preprocess_seqid_op: expected unconfirmed stateowner!\n"); |
| 2225 | goto out; |
| 2226 | } |
| 2227 | } |
| 2228 | else { |
| 2229 | if (!(flags & CONFIRM)) { |
| 2230 | printk("NFSD: preprocess_seqid_op: stateowner not confirmed yet!\n"); |
| 2231 | goto out; |
| 2232 | } |
| 2233 | } |
| 2234 | if (stateid->si_generation > stp->st_stateid.si_generation) { |
| 2235 | printk("NFSD: preprocess_seqid_op: future stateid?!\n"); |
| 2236 | goto out; |
| 2237 | } |
| 2238 | |
| 2239 | status = nfserr_old_stateid; |
| 2240 | if (stateid->si_generation < stp->st_stateid.si_generation) { |
| 2241 | printk("NFSD: preprocess_seqid_op: old stateid!\n"); |
| 2242 | goto out; |
| 2243 | } |
| 2244 | /* XXX renew the client lease here */ |
| 2245 | status = nfs_ok; |
| 2246 | |
| 2247 | out: |
| 2248 | return status; |
| 2249 | |
| 2250 | no_nfs4_stateid: |
| 2251 | |
| 2252 | /* |
| 2253 | * We determine whether this is a bad stateid or a replay, |
| 2254 | * starting by trying to look up the stateowner. |
| 2255 | * If stateowner is not found - stateid is bad. |
| 2256 | */ |
| 2257 | if (!(sop = find_openstateowner_id(stateid->si_stateownerid, flags))) { |
| 2258 | printk("NFSD: preprocess_seqid_op: no stateowner or nfs4_stateid!\n"); |
| 2259 | status = nfserr_bad_stateid; |
| 2260 | goto out; |
| 2261 | } |
| 2262 | *sopp = sop; |
| 2263 | |
| 2264 | check_replay: |
| 2265 | if (seqid == sop->so_seqid) { |
| 2266 | printk("NFSD: preprocess_seqid_op: retransmission?\n"); |
| 2267 | /* indicate replay to calling function */ |
| 2268 | status = NFSERR_REPLAY_ME; |
| 2269 | } else { |
| 2270 | printk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d\n", sop->so_seqid +1, seqid); |
| 2271 | |
| 2272 | *sopp = NULL; |
| 2273 | status = nfserr_bad_seqid; |
| 2274 | } |
| 2275 | goto out; |
| 2276 | } |
| 2277 | |
| 2278 | int |
| 2279 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_confirm *oc) |
| 2280 | { |
| 2281 | int status; |
| 2282 | struct nfs4_stateowner *sop; |
| 2283 | struct nfs4_stateid *stp; |
| 2284 | |
| 2285 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", |
| 2286 | (int)current_fh->fh_dentry->d_name.len, |
| 2287 | current_fh->fh_dentry->d_name.name); |
| 2288 | |
| 2289 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) |
| 2290 | goto out; |
| 2291 | |
| 2292 | nfs4_lock_state(); |
| 2293 | |
| 2294 | if ((status = nfs4_preprocess_seqid_op(current_fh, oc->oc_seqid, |
| 2295 | &oc->oc_req_stateid, |
| 2296 | CHECK_FH | CONFIRM | OPEN_STATE, |
| 2297 | &oc->oc_stateowner, &stp, NULL))) |
| 2298 | goto out; |
| 2299 | |
| 2300 | sop = oc->oc_stateowner; |
| 2301 | sop->so_confirmed = 1; |
| 2302 | update_stateid(&stp->st_stateid); |
| 2303 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2304 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " |
| 2305 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, |
| 2306 | stp->st_stateid.si_boot, |
| 2307 | stp->st_stateid.si_stateownerid, |
| 2308 | stp->st_stateid.si_fileid, |
| 2309 | stp->st_stateid.si_generation); |
| 2310 | out: |
| 2311 | if (oc->oc_stateowner) |
| 2312 | nfs4_get_stateowner(oc->oc_stateowner); |
| 2313 | nfs4_unlock_state(); |
| 2314 | return status; |
| 2315 | } |
| 2316 | |
| 2317 | |
| 2318 | /* |
| 2319 | * unset all bits in union bitmap (bmap) that |
| 2320 | * do not exist in share (from successful OPEN_DOWNGRADE) |
| 2321 | */ |
| 2322 | static void |
| 2323 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) |
| 2324 | { |
| 2325 | int i; |
| 2326 | for (i = 1; i < 4; i++) { |
| 2327 | if ((i & access) != i) |
| 2328 | __clear_bit(i, bmap); |
| 2329 | } |
| 2330 | } |
| 2331 | |
| 2332 | static void |
| 2333 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) |
| 2334 | { |
| 2335 | int i; |
| 2336 | for (i = 0; i < 4; i++) { |
| 2337 | if ((i & deny) != i) |
| 2338 | __clear_bit(i, bmap); |
| 2339 | } |
| 2340 | } |
| 2341 | |
| 2342 | int |
| 2343 | nfsd4_open_downgrade(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open_downgrade *od) |
| 2344 | { |
| 2345 | int status; |
| 2346 | struct nfs4_stateid *stp; |
| 2347 | unsigned int share_access; |
| 2348 | |
| 2349 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", |
| 2350 | (int)current_fh->fh_dentry->d_name.len, |
| 2351 | current_fh->fh_dentry->d_name.name); |
| 2352 | |
| 2353 | if (!TEST_ACCESS(od->od_share_access) || !TEST_DENY(od->od_share_deny)) |
| 2354 | return nfserr_inval; |
| 2355 | |
| 2356 | nfs4_lock_state(); |
| 2357 | if ((status = nfs4_preprocess_seqid_op(current_fh, od->od_seqid, |
| 2358 | &od->od_stateid, |
| 2359 | CHECK_FH | OPEN_STATE, |
| 2360 | &od->od_stateowner, &stp, NULL))) |
| 2361 | goto out; |
| 2362 | |
| 2363 | status = nfserr_inval; |
| 2364 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { |
| 2365 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", |
| 2366 | stp->st_access_bmap, od->od_share_access); |
| 2367 | goto out; |
| 2368 | } |
| 2369 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { |
| 2370 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", |
| 2371 | stp->st_deny_bmap, od->od_share_deny); |
| 2372 | goto out; |
| 2373 | } |
| 2374 | set_access(&share_access, stp->st_access_bmap); |
| 2375 | nfs4_file_downgrade(stp->st_vfs_file, |
| 2376 | share_access & ~od->od_share_access); |
| 2377 | |
| 2378 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); |
| 2379 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); |
| 2380 | |
| 2381 | update_stateid(&stp->st_stateid); |
| 2382 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2383 | status = nfs_ok; |
| 2384 | out: |
| 2385 | if (od->od_stateowner) |
| 2386 | nfs4_get_stateowner(od->od_stateowner); |
| 2387 | nfs4_unlock_state(); |
| 2388 | return status; |
| 2389 | } |
| 2390 | |
| 2391 | /* |
| 2392 | * nfs4_unlock_state() called after encode |
| 2393 | */ |
| 2394 | int |
| 2395 | nfsd4_close(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_close *close) |
| 2396 | { |
| 2397 | int status; |
| 2398 | struct nfs4_stateid *stp; |
| 2399 | |
| 2400 | dprintk("NFSD: nfsd4_close on file %.*s\n", |
| 2401 | (int)current_fh->fh_dentry->d_name.len, |
| 2402 | current_fh->fh_dentry->d_name.name); |
| 2403 | |
| 2404 | nfs4_lock_state(); |
| 2405 | /* check close_lru for replay */ |
| 2406 | if ((status = nfs4_preprocess_seqid_op(current_fh, close->cl_seqid, |
| 2407 | &close->cl_stateid, |
| 2408 | CHECK_FH | OPEN_STATE | CLOSE_STATE, |
| 2409 | &close->cl_stateowner, &stp, NULL))) |
| 2410 | goto out; |
| 2411 | /* |
| 2412 | * Return success, but first update the stateid. |
| 2413 | */ |
| 2414 | status = nfs_ok; |
| 2415 | update_stateid(&stp->st_stateid); |
| 2416 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 2417 | |
| 2418 | /* release_state_owner() calls nfsd_close() if needed */ |
| 2419 | release_state_owner(stp, OPEN_STATE); |
| 2420 | out: |
| 2421 | if (close->cl_stateowner) |
| 2422 | nfs4_get_stateowner(close->cl_stateowner); |
| 2423 | nfs4_unlock_state(); |
| 2424 | return status; |
| 2425 | } |
| 2426 | |
| 2427 | int |
| 2428 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_delegreturn *dr) |
| 2429 | { |
| 2430 | int status; |
| 2431 | |
| 2432 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) |
| 2433 | goto out; |
| 2434 | |
| 2435 | nfs4_lock_state(); |
| 2436 | status = nfs4_preprocess_stateid_op(current_fh, &dr->dr_stateid, DELEG_RET, NULL); |
| 2437 | nfs4_unlock_state(); |
| 2438 | out: |
| 2439 | return status; |
| 2440 | } |
| 2441 | |
| 2442 | |
| 2443 | /* |
| 2444 | * Lock owner state (byte-range locks) |
| 2445 | */ |
| 2446 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) |
| 2447 | #define LOCK_HASH_BITS 8 |
| 2448 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) |
| 2449 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) |
| 2450 | |
| 2451 | #define lockownerid_hashval(id) \ |
| 2452 | ((id) & LOCK_HASH_MASK) |
| 2453 | |
| 2454 | static inline unsigned int |
| 2455 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, |
| 2456 | struct xdr_netobj *ownername) |
| 2457 | { |
| 2458 | return (file_hashval(inode) + cl_id |
| 2459 | + opaque_hashval(ownername->data, ownername->len)) |
| 2460 | & LOCK_HASH_MASK; |
| 2461 | } |
| 2462 | |
| 2463 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; |
| 2464 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; |
| 2465 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; |
| 2466 | |
| 2467 | struct nfs4_stateid * |
| 2468 | find_stateid(stateid_t *stid, int flags) |
| 2469 | { |
| 2470 | struct nfs4_stateid *local = NULL; |
| 2471 | u32 st_id = stid->si_stateownerid; |
| 2472 | u32 f_id = stid->si_fileid; |
| 2473 | unsigned int hashval; |
| 2474 | |
| 2475 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); |
| 2476 | if ((flags & LOCK_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { |
| 2477 | hashval = stateid_hashval(st_id, f_id); |
| 2478 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { |
| 2479 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2480 | (local->st_stateid.si_fileid == f_id)) |
| 2481 | return local; |
| 2482 | } |
| 2483 | } |
| 2484 | if ((flags & OPEN_STATE) || (flags & RD_STATE) || (flags & WR_STATE)) { |
| 2485 | hashval = stateid_hashval(st_id, f_id); |
| 2486 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { |
| 2487 | if ((local->st_stateid.si_stateownerid == st_id) && |
| 2488 | (local->st_stateid.si_fileid == f_id)) |
| 2489 | return local; |
| 2490 | } |
| 2491 | } else |
| 2492 | printk("NFSD: find_stateid: ERROR: no state flag\n"); |
| 2493 | return NULL; |
| 2494 | } |
| 2495 | |
| 2496 | static struct nfs4_delegation * |
| 2497 | find_delegation_stateid(struct inode *ino, stateid_t *stid) |
| 2498 | { |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2499 | struct nfs4_file *fp; |
| 2500 | struct nfs4_delegation *dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2501 | |
| 2502 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", |
| 2503 | stid->si_boot, stid->si_stateownerid, |
| 2504 | stid->si_fileid, stid->si_generation); |
| 2505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2506 | fp = find_file(ino); |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2507 | if (!fp) |
| 2508 | return NULL; |
| 2509 | dl = find_delegation_file(fp, stid); |
| 2510 | put_nfs4_file(fp); |
| 2511 | return dl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2512 | } |
| 2513 | |
| 2514 | /* |
| 2515 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that |
| 2516 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th |
| 2517 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit |
| 2518 | * locking, this prevents us from being completely protocol-compliant. The |
| 2519 | * real solution to this problem is to start using unsigned file offsets in |
| 2520 | * the VFS, but this is a very deep change! |
| 2521 | */ |
| 2522 | static inline void |
| 2523 | nfs4_transform_lock_offset(struct file_lock *lock) |
| 2524 | { |
| 2525 | if (lock->fl_start < 0) |
| 2526 | lock->fl_start = OFFSET_MAX; |
| 2527 | if (lock->fl_end < 0) |
| 2528 | lock->fl_end = OFFSET_MAX; |
| 2529 | } |
| 2530 | |
| 2531 | int |
| 2532 | nfs4_verify_lock_stateowner(struct nfs4_stateowner *sop, unsigned int hashval) |
| 2533 | { |
| 2534 | struct nfs4_stateowner *local = NULL; |
| 2535 | int status = 0; |
| 2536 | |
| 2537 | if (hashval >= LOCK_HASH_SIZE) |
| 2538 | goto out; |
| 2539 | list_for_each_entry(local, &lock_ownerid_hashtbl[hashval], so_idhash) { |
| 2540 | if (local == sop) { |
| 2541 | status = 1; |
| 2542 | goto out; |
| 2543 | } |
| 2544 | } |
| 2545 | out: |
| 2546 | return status; |
| 2547 | } |
| 2548 | |
| 2549 | |
| 2550 | static inline void |
| 2551 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) |
| 2552 | { |
| 2553 | struct nfs4_stateowner *sop = (struct nfs4_stateowner *) fl->fl_owner; |
| 2554 | unsigned int hval = lockownerid_hashval(sop->so_id); |
| 2555 | |
| 2556 | deny->ld_sop = NULL; |
| 2557 | if (nfs4_verify_lock_stateowner(sop, hval)) { |
| 2558 | kref_get(&sop->so_ref); |
| 2559 | deny->ld_sop = sop; |
| 2560 | deny->ld_clientid = sop->so_client->cl_clientid; |
| 2561 | } |
| 2562 | deny->ld_start = fl->fl_start; |
| 2563 | deny->ld_length = ~(u64)0; |
| 2564 | if (fl->fl_end != ~(u64)0) |
| 2565 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
| 2566 | deny->ld_type = NFS4_READ_LT; |
| 2567 | if (fl->fl_type != F_RDLCK) |
| 2568 | deny->ld_type = NFS4_WRITE_LT; |
| 2569 | } |
| 2570 | |
| 2571 | static struct nfs4_stateowner * |
| 2572 | find_lockstateowner(struct xdr_netobj *owner, clientid_t *clid) |
| 2573 | { |
| 2574 | struct nfs4_stateowner *local = NULL; |
| 2575 | int i; |
| 2576 | |
| 2577 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 2578 | list_for_each_entry(local, &lock_ownerid_hashtbl[i], so_idhash) { |
| 2579 | if (!cmp_owner_str(local, owner, clid)) |
| 2580 | continue; |
| 2581 | return local; |
| 2582 | } |
| 2583 | } |
| 2584 | return NULL; |
| 2585 | } |
| 2586 | |
| 2587 | static struct nfs4_stateowner * |
| 2588 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, |
| 2589 | struct xdr_netobj *owner) |
| 2590 | { |
| 2591 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); |
| 2592 | struct nfs4_stateowner *op; |
| 2593 | |
| 2594 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { |
| 2595 | if (cmp_owner_str(op, owner, clid)) |
| 2596 | return op; |
| 2597 | } |
| 2598 | return NULL; |
| 2599 | } |
| 2600 | |
| 2601 | /* |
| 2602 | * Alloc a lock owner structure. |
| 2603 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has |
| 2604 | * occured. |
| 2605 | * |
| 2606 | * strhashval = lock_ownerstr_hashval |
| 2607 | * so_seqid = lock->lk_new_lock_seqid - 1: it gets bumped in encode |
| 2608 | */ |
| 2609 | |
| 2610 | static struct nfs4_stateowner * |
| 2611 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { |
| 2612 | struct nfs4_stateowner *sop; |
| 2613 | struct nfs4_replay *rp; |
| 2614 | unsigned int idhashval; |
| 2615 | |
| 2616 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) |
| 2617 | return NULL; |
| 2618 | idhashval = lockownerid_hashval(current_ownerid); |
| 2619 | INIT_LIST_HEAD(&sop->so_idhash); |
| 2620 | INIT_LIST_HEAD(&sop->so_strhash); |
| 2621 | INIT_LIST_HEAD(&sop->so_perclient); |
| 2622 | INIT_LIST_HEAD(&sop->so_perfilestate); |
| 2623 | INIT_LIST_HEAD(&sop->so_perlockowner); |
| 2624 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
| 2625 | sop->so_time = 0; |
| 2626 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); |
| 2627 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); |
| 2628 | list_add(&sop->so_perlockowner, &open_stp->st_perlockowner); |
| 2629 | sop->so_is_open_owner = 0; |
| 2630 | sop->so_id = current_ownerid++; |
| 2631 | sop->so_client = clp; |
| 2632 | sop->so_seqid = lock->lk_new_lock_seqid - 1; |
| 2633 | sop->so_confirmed = 1; |
| 2634 | rp = &sop->so_replay; |
| 2635 | rp->rp_status = NFSERR_SERVERFAULT; |
| 2636 | rp->rp_buflen = 0; |
| 2637 | rp->rp_buf = rp->rp_ibuf; |
| 2638 | return sop; |
| 2639 | } |
| 2640 | |
| 2641 | struct nfs4_stateid * |
| 2642 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
| 2643 | { |
| 2644 | struct nfs4_stateid *stp; |
| 2645 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); |
| 2646 | |
NeilBrown | 5ac049a | 2005-06-23 22:03:03 -0700 | [diff] [blame] | 2647 | stp = nfs4_alloc_stateid(); |
| 2648 | if (stp == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2649 | goto out; |
| 2650 | INIT_LIST_HEAD(&stp->st_hash); |
| 2651 | INIT_LIST_HEAD(&stp->st_perfile); |
| 2652 | INIT_LIST_HEAD(&stp->st_perfilestate); |
| 2653 | INIT_LIST_HEAD(&stp->st_perlockowner); /* not used */ |
| 2654 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
NeilBrown | 8beefa2 | 2005-06-23 22:03:08 -0700 | [diff] [blame] | 2655 | list_add(&stp->st_perfile, &fp->fi_stateids); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2656 | list_add(&stp->st_perfilestate, &sop->so_perfilestate); |
| 2657 | stp->st_stateowner = sop; |
NeilBrown | 13cd218 | 2005-06-23 22:03:10 -0700 | [diff] [blame] | 2658 | get_nfs4_file(fp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2659 | stp->st_file = fp; |
| 2660 | stp->st_stateid.si_boot = boot_time; |
| 2661 | stp->st_stateid.si_stateownerid = sop->so_id; |
| 2662 | stp->st_stateid.si_fileid = fp->fi_id; |
| 2663 | stp->st_stateid.si_generation = 0; |
| 2664 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ |
| 2665 | stp->st_access_bmap = open_stp->st_access_bmap; |
| 2666 | stp->st_deny_bmap = open_stp->st_deny_bmap; |
| 2667 | |
| 2668 | out: |
| 2669 | return stp; |
| 2670 | } |
| 2671 | |
| 2672 | int |
| 2673 | check_lock_length(u64 offset, u64 length) |
| 2674 | { |
| 2675 | return ((length == 0) || ((length != ~(u64)0) && |
| 2676 | LOFF_OVERFLOW(offset, length))); |
| 2677 | } |
| 2678 | |
| 2679 | /* |
| 2680 | * LOCK operation |
| 2681 | */ |
| 2682 | int |
| 2683 | nfsd4_lock(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lock *lock) |
| 2684 | { |
| 2685 | struct nfs4_stateowner *lock_sop = NULL, *open_sop = NULL; |
| 2686 | struct nfs4_stateid *lock_stp; |
| 2687 | struct file *filp; |
| 2688 | struct file_lock file_lock; |
| 2689 | struct file_lock *conflock; |
| 2690 | int status = 0; |
| 2691 | unsigned int strhashval; |
| 2692 | |
| 2693 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", |
| 2694 | (long long) lock->lk_offset, |
| 2695 | (long long) lock->lk_length); |
| 2696 | |
| 2697 | if (nfs4_in_grace() && !lock->lk_reclaim) |
| 2698 | return nfserr_grace; |
| 2699 | if (!nfs4_in_grace() && lock->lk_reclaim) |
| 2700 | return nfserr_no_grace; |
| 2701 | |
| 2702 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
| 2703 | return nfserr_inval; |
| 2704 | |
| 2705 | nfs4_lock_state(); |
| 2706 | |
| 2707 | if (lock->lk_is_new) { |
| 2708 | /* |
| 2709 | * Client indicates that this is a new lockowner. |
| 2710 | * Use open owner and open stateid to create lock owner and lock |
| 2711 | * stateid. |
| 2712 | */ |
| 2713 | struct nfs4_stateid *open_stp = NULL; |
| 2714 | struct nfs4_file *fp; |
| 2715 | |
| 2716 | status = nfserr_stale_clientid; |
| 2717 | if (STALE_CLIENTID(&lock->lk_new_clientid)) { |
| 2718 | printk("NFSD: nfsd4_lock: clientid is stale!\n"); |
| 2719 | goto out; |
| 2720 | } |
| 2721 | |
| 2722 | /* is the new lock seqid presented by the client zero? */ |
| 2723 | status = nfserr_bad_seqid; |
| 2724 | if (lock->v.new.lock_seqid != 0) |
| 2725 | goto out; |
| 2726 | |
| 2727 | /* validate and update open stateid and open seqid */ |
| 2728 | status = nfs4_preprocess_seqid_op(current_fh, |
| 2729 | lock->lk_new_open_seqid, |
| 2730 | &lock->lk_new_open_stateid, |
| 2731 | CHECK_FH | OPEN_STATE, |
| 2732 | &open_sop, &open_stp, |
| 2733 | &lock->v.new.clientid); |
| 2734 | if (status) { |
| 2735 | if (lock->lk_reclaim) |
| 2736 | status = nfserr_reclaim_bad; |
| 2737 | goto out; |
| 2738 | } |
| 2739 | /* create lockowner and lock stateid */ |
| 2740 | fp = open_stp->st_file; |
| 2741 | strhashval = lock_ownerstr_hashval(fp->fi_inode, |
| 2742 | open_sop->so_client->cl_clientid.cl_id, |
| 2743 | &lock->v.new.owner); |
| 2744 | /* |
| 2745 | * If we already have this lock owner, the client is in |
| 2746 | * error (or our bookeeping is wrong!) |
| 2747 | * for asking for a 'new lock'. |
| 2748 | */ |
| 2749 | status = nfserr_bad_stateid; |
| 2750 | lock_sop = find_lockstateowner(&lock->v.new.owner, |
| 2751 | &lock->v.new.clientid); |
| 2752 | if (lock_sop) |
| 2753 | goto out; |
| 2754 | status = nfserr_resource; |
| 2755 | if (!(lock->lk_stateowner = alloc_init_lock_stateowner(strhashval, open_sop->so_client, open_stp, lock))) |
| 2756 | goto out; |
| 2757 | if ((lock_stp = alloc_init_lock_stateid(lock->lk_stateowner, |
| 2758 | fp, open_stp)) == NULL) { |
| 2759 | release_stateowner(lock->lk_stateowner); |
| 2760 | lock->lk_stateowner = NULL; |
| 2761 | goto out; |
| 2762 | } |
| 2763 | /* bump the open seqid used to create the lock */ |
| 2764 | open_sop->so_seqid++; |
| 2765 | } else { |
| 2766 | /* lock (lock owner + lock stateid) already exists */ |
| 2767 | status = nfs4_preprocess_seqid_op(current_fh, |
| 2768 | lock->lk_old_lock_seqid, |
| 2769 | &lock->lk_old_lock_stateid, |
| 2770 | CHECK_FH | LOCK_STATE, |
| 2771 | &lock->lk_stateowner, &lock_stp, NULL); |
| 2772 | if (status) |
| 2773 | goto out; |
| 2774 | } |
| 2775 | /* lock->lk_stateowner and lock_stp have been created or found */ |
| 2776 | filp = lock_stp->st_vfs_file; |
| 2777 | |
| 2778 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, MAY_LOCK))) { |
| 2779 | printk("NFSD: nfsd4_lock: permission denied!\n"); |
| 2780 | goto out; |
| 2781 | } |
| 2782 | |
| 2783 | locks_init_lock(&file_lock); |
| 2784 | switch (lock->lk_type) { |
| 2785 | case NFS4_READ_LT: |
| 2786 | case NFS4_READW_LT: |
| 2787 | file_lock.fl_type = F_RDLCK; |
| 2788 | break; |
| 2789 | case NFS4_WRITE_LT: |
| 2790 | case NFS4_WRITEW_LT: |
| 2791 | file_lock.fl_type = F_WRLCK; |
| 2792 | break; |
| 2793 | default: |
| 2794 | status = nfserr_inval; |
| 2795 | goto out; |
| 2796 | } |
| 2797 | file_lock.fl_owner = (fl_owner_t) lock->lk_stateowner; |
| 2798 | file_lock.fl_pid = current->tgid; |
| 2799 | file_lock.fl_file = filp; |
| 2800 | file_lock.fl_flags = FL_POSIX; |
| 2801 | |
| 2802 | file_lock.fl_start = lock->lk_offset; |
| 2803 | if ((lock->lk_length == ~(u64)0) || |
| 2804 | LOFF_OVERFLOW(lock->lk_offset, lock->lk_length)) |
| 2805 | file_lock.fl_end = ~(u64)0; |
| 2806 | else |
| 2807 | file_lock.fl_end = lock->lk_offset + lock->lk_length - 1; |
| 2808 | nfs4_transform_lock_offset(&file_lock); |
| 2809 | |
| 2810 | /* |
| 2811 | * Try to lock the file in the VFS. |
| 2812 | * Note: locks.c uses the BKL to protect the inode's lock list. |
| 2813 | */ |
| 2814 | |
| 2815 | status = posix_lock_file(filp, &file_lock); |
| 2816 | if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) |
| 2817 | file_lock.fl_ops->fl_release_private(&file_lock); |
| 2818 | dprintk("NFSD: nfsd4_lock: posix_lock_file status %d\n",status); |
| 2819 | switch (-status) { |
| 2820 | case 0: /* success! */ |
| 2821 | update_stateid(&lock_stp->st_stateid); |
| 2822 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, |
| 2823 | sizeof(stateid_t)); |
| 2824 | goto out; |
| 2825 | case (EAGAIN): |
| 2826 | goto conflicting_lock; |
| 2827 | case (EDEADLK): |
| 2828 | status = nfserr_deadlock; |
| 2829 | default: |
| 2830 | dprintk("NFSD: nfsd4_lock: posix_lock_file() failed! status %d\n",status); |
| 2831 | goto out_destroy_new_stateid; |
| 2832 | } |
| 2833 | |
| 2834 | conflicting_lock: |
| 2835 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); |
| 2836 | status = nfserr_denied; |
| 2837 | /* XXX There is a race here. Future patch needed to provide |
| 2838 | * an atomic posix_lock_and_test_file |
| 2839 | */ |
| 2840 | if (!(conflock = posix_test_lock(filp, &file_lock))) { |
| 2841 | status = nfserr_serverfault; |
| 2842 | goto out; |
| 2843 | } |
| 2844 | nfs4_set_lock_denied(conflock, &lock->lk_denied); |
| 2845 | |
| 2846 | out_destroy_new_stateid: |
| 2847 | if (lock->lk_is_new) { |
| 2848 | dprintk("NFSD: nfsd4_lock: destroy new stateid!\n"); |
| 2849 | /* |
| 2850 | * An error encountered after instantiation of the new |
| 2851 | * stateid has forced us to destroy it. |
| 2852 | */ |
| 2853 | if (!seqid_mutating_err(status)) |
| 2854 | open_sop->so_seqid--; |
| 2855 | |
| 2856 | release_state_owner(lock_stp, LOCK_STATE); |
| 2857 | } |
| 2858 | out: |
| 2859 | if (lock->lk_stateowner) |
| 2860 | nfs4_get_stateowner(lock->lk_stateowner); |
| 2861 | nfs4_unlock_state(); |
| 2862 | return status; |
| 2863 | } |
| 2864 | |
| 2865 | /* |
| 2866 | * LOCKT operation |
| 2867 | */ |
| 2868 | int |
| 2869 | nfsd4_lockt(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_lockt *lockt) |
| 2870 | { |
| 2871 | struct inode *inode; |
| 2872 | struct file file; |
| 2873 | struct file_lock file_lock; |
| 2874 | struct file_lock *conflicting_lock; |
| 2875 | int status; |
| 2876 | |
| 2877 | if (nfs4_in_grace()) |
| 2878 | return nfserr_grace; |
| 2879 | |
| 2880 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) |
| 2881 | return nfserr_inval; |
| 2882 | |
| 2883 | lockt->lt_stateowner = NULL; |
| 2884 | nfs4_lock_state(); |
| 2885 | |
| 2886 | status = nfserr_stale_clientid; |
| 2887 | if (STALE_CLIENTID(&lockt->lt_clientid)) { |
| 2888 | printk("NFSD: nfsd4_lockt: clientid is stale!\n"); |
| 2889 | goto out; |
| 2890 | } |
| 2891 | |
| 2892 | if ((status = fh_verify(rqstp, current_fh, S_IFREG, 0))) { |
| 2893 | printk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
| 2894 | if (status == nfserr_symlink) |
| 2895 | status = nfserr_inval; |
| 2896 | goto out; |
| 2897 | } |
| 2898 | |
| 2899 | inode = current_fh->fh_dentry->d_inode; |
| 2900 | locks_init_lock(&file_lock); |
| 2901 | switch (lockt->lt_type) { |
| 2902 | case NFS4_READ_LT: |
| 2903 | case NFS4_READW_LT: |
| 2904 | file_lock.fl_type = F_RDLCK; |
| 2905 | break; |
| 2906 | case NFS4_WRITE_LT: |
| 2907 | case NFS4_WRITEW_LT: |
| 2908 | file_lock.fl_type = F_WRLCK; |
| 2909 | break; |
| 2910 | default: |
| 2911 | printk("NFSD: nfs4_lockt: bad lock type!\n"); |
| 2912 | status = nfserr_inval; |
| 2913 | goto out; |
| 2914 | } |
| 2915 | |
| 2916 | lockt->lt_stateowner = find_lockstateowner_str(inode, |
| 2917 | &lockt->lt_clientid, &lockt->lt_owner); |
| 2918 | if (lockt->lt_stateowner) |
| 2919 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; |
| 2920 | file_lock.fl_pid = current->tgid; |
| 2921 | file_lock.fl_flags = FL_POSIX; |
| 2922 | |
| 2923 | file_lock.fl_start = lockt->lt_offset; |
| 2924 | if ((lockt->lt_length == ~(u64)0) || LOFF_OVERFLOW(lockt->lt_offset, lockt->lt_length)) |
| 2925 | file_lock.fl_end = ~(u64)0; |
| 2926 | else |
| 2927 | file_lock.fl_end = lockt->lt_offset + lockt->lt_length - 1; |
| 2928 | |
| 2929 | nfs4_transform_lock_offset(&file_lock); |
| 2930 | |
| 2931 | /* posix_test_lock uses the struct file _only_ to resolve the inode. |
| 2932 | * since LOCKT doesn't require an OPEN, and therefore a struct |
| 2933 | * file may not exist, pass posix_test_lock a struct file with |
| 2934 | * only the dentry:inode set. |
| 2935 | */ |
| 2936 | memset(&file, 0, sizeof (struct file)); |
| 2937 | file.f_dentry = current_fh->fh_dentry; |
| 2938 | |
| 2939 | status = nfs_ok; |
| 2940 | conflicting_lock = posix_test_lock(&file, &file_lock); |
| 2941 | if (conflicting_lock) { |
| 2942 | status = nfserr_denied; |
| 2943 | nfs4_set_lock_denied(conflicting_lock, &lockt->lt_denied); |
| 2944 | } |
| 2945 | out: |
| 2946 | nfs4_unlock_state(); |
| 2947 | return status; |
| 2948 | } |
| 2949 | |
| 2950 | int |
| 2951 | nfsd4_locku(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_locku *locku) |
| 2952 | { |
| 2953 | struct nfs4_stateid *stp; |
| 2954 | struct file *filp = NULL; |
| 2955 | struct file_lock file_lock; |
| 2956 | int status; |
| 2957 | |
| 2958 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", |
| 2959 | (long long) locku->lu_offset, |
| 2960 | (long long) locku->lu_length); |
| 2961 | |
| 2962 | if (check_lock_length(locku->lu_offset, locku->lu_length)) |
| 2963 | return nfserr_inval; |
| 2964 | |
| 2965 | nfs4_lock_state(); |
| 2966 | |
| 2967 | if ((status = nfs4_preprocess_seqid_op(current_fh, |
| 2968 | locku->lu_seqid, |
| 2969 | &locku->lu_stateid, |
| 2970 | CHECK_FH | LOCK_STATE, |
| 2971 | &locku->lu_stateowner, &stp, NULL))) |
| 2972 | goto out; |
| 2973 | |
| 2974 | filp = stp->st_vfs_file; |
| 2975 | BUG_ON(!filp); |
| 2976 | locks_init_lock(&file_lock); |
| 2977 | file_lock.fl_type = F_UNLCK; |
| 2978 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; |
| 2979 | file_lock.fl_pid = current->tgid; |
| 2980 | file_lock.fl_file = filp; |
| 2981 | file_lock.fl_flags = FL_POSIX; |
| 2982 | file_lock.fl_start = locku->lu_offset; |
| 2983 | |
| 2984 | if ((locku->lu_length == ~(u64)0) || LOFF_OVERFLOW(locku->lu_offset, locku->lu_length)) |
| 2985 | file_lock.fl_end = ~(u64)0; |
| 2986 | else |
| 2987 | file_lock.fl_end = locku->lu_offset + locku->lu_length - 1; |
| 2988 | nfs4_transform_lock_offset(&file_lock); |
| 2989 | |
| 2990 | /* |
| 2991 | * Try to unlock the file in the VFS. |
| 2992 | */ |
| 2993 | status = posix_lock_file(filp, &file_lock); |
| 2994 | if (file_lock.fl_ops && file_lock.fl_ops->fl_release_private) |
| 2995 | file_lock.fl_ops->fl_release_private(&file_lock); |
| 2996 | if (status) { |
| 2997 | printk("NFSD: nfs4_locku: posix_lock_file failed!\n"); |
| 2998 | goto out_nfserr; |
| 2999 | } |
| 3000 | /* |
| 3001 | * OK, unlock succeeded; the only thing left to do is update the stateid. |
| 3002 | */ |
| 3003 | update_stateid(&stp->st_stateid); |
| 3004 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); |
| 3005 | |
| 3006 | out: |
| 3007 | if (locku->lu_stateowner) |
| 3008 | nfs4_get_stateowner(locku->lu_stateowner); |
| 3009 | nfs4_unlock_state(); |
| 3010 | return status; |
| 3011 | |
| 3012 | out_nfserr: |
| 3013 | status = nfserrno(status); |
| 3014 | goto out; |
| 3015 | } |
| 3016 | |
| 3017 | /* |
| 3018 | * returns |
| 3019 | * 1: locks held by lockowner |
| 3020 | * 0: no locks held by lockowner |
| 3021 | */ |
| 3022 | static int |
| 3023 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) |
| 3024 | { |
| 3025 | struct file_lock **flpp; |
| 3026 | struct inode *inode = filp->f_dentry->d_inode; |
| 3027 | int status = 0; |
| 3028 | |
| 3029 | lock_kernel(); |
| 3030 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { |
| 3031 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) |
| 3032 | status = 1; |
| 3033 | goto out; |
| 3034 | } |
| 3035 | out: |
| 3036 | unlock_kernel(); |
| 3037 | return status; |
| 3038 | } |
| 3039 | |
| 3040 | int |
| 3041 | nfsd4_release_lockowner(struct svc_rqst *rqstp, struct nfsd4_release_lockowner *rlockowner) |
| 3042 | { |
| 3043 | clientid_t *clid = &rlockowner->rl_clientid; |
| 3044 | struct nfs4_stateowner *local = NULL; |
| 3045 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
| 3046 | int status; |
| 3047 | |
| 3048 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", |
| 3049 | clid->cl_boot, clid->cl_id); |
| 3050 | |
| 3051 | /* XXX check for lease expiration */ |
| 3052 | |
| 3053 | status = nfserr_stale_clientid; |
| 3054 | if (STALE_CLIENTID(clid)) { |
| 3055 | printk("NFSD: nfsd4_release_lockowner: clientid is stale!\n"); |
| 3056 | return status; |
| 3057 | } |
| 3058 | |
| 3059 | nfs4_lock_state(); |
| 3060 | |
| 3061 | status = nfs_ok; |
| 3062 | local = find_lockstateowner(owner, clid); |
| 3063 | if (local) { |
| 3064 | struct nfs4_stateid *stp; |
| 3065 | |
| 3066 | /* check for any locks held by any stateid |
| 3067 | * associated with the (lock) stateowner */ |
| 3068 | status = nfserr_locks_held; |
| 3069 | list_for_each_entry(stp, &local->so_perfilestate, |
| 3070 | st_perfilestate) { |
| 3071 | if (check_for_locks(stp->st_vfs_file, local)) |
| 3072 | goto out; |
| 3073 | } |
| 3074 | /* no locks held by (lock) stateowner */ |
| 3075 | status = nfs_ok; |
| 3076 | release_stateowner(local); |
| 3077 | } |
| 3078 | out: |
| 3079 | nfs4_unlock_state(); |
| 3080 | return status; |
| 3081 | } |
| 3082 | |
| 3083 | static inline struct nfs4_client_reclaim * |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3084 | alloc_reclaim(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3085 | { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3086 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3087 | } |
| 3088 | |
| 3089 | /* |
| 3090 | * failure => all reset bets are off, nfserr_no_grace... |
| 3091 | */ |
| 3092 | static int |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3093 | nfs4_client_to_reclaim(char *name) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3094 | { |
| 3095 | unsigned int strhashval; |
| 3096 | struct nfs4_client_reclaim *crp = NULL; |
| 3097 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3098 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
| 3099 | crp = alloc_reclaim(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3100 | if (!crp) |
| 3101 | return 0; |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3102 | strhashval = clientstr_hashval(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3103 | INIT_LIST_HEAD(&crp->cr_strhash); |
| 3104 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3105 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3106 | reclaim_str_hashtbl_size++; |
| 3107 | return 1; |
| 3108 | } |
| 3109 | |
| 3110 | static void |
| 3111 | nfs4_release_reclaim(void) |
| 3112 | { |
| 3113 | struct nfs4_client_reclaim *crp = NULL; |
| 3114 | int i; |
| 3115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3116 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3117 | while (!list_empty(&reclaim_str_hashtbl[i])) { |
| 3118 | crp = list_entry(reclaim_str_hashtbl[i].next, |
| 3119 | struct nfs4_client_reclaim, cr_strhash); |
| 3120 | list_del(&crp->cr_strhash); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3121 | kfree(crp); |
| 3122 | reclaim_str_hashtbl_size--; |
| 3123 | } |
| 3124 | } |
| 3125 | BUG_ON(reclaim_str_hashtbl_size); |
| 3126 | } |
| 3127 | |
| 3128 | /* |
| 3129 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ |
| 3130 | struct nfs4_client_reclaim * |
| 3131 | nfs4_find_reclaim_client(clientid_t *clid) |
| 3132 | { |
| 3133 | unsigned int strhashval; |
| 3134 | struct nfs4_client *clp; |
| 3135 | struct nfs4_client_reclaim *crp = NULL; |
| 3136 | |
| 3137 | |
| 3138 | /* find clientid in conf_id_hashtbl */ |
| 3139 | clp = find_confirmed_client(clid); |
| 3140 | if (clp == NULL) |
| 3141 | return NULL; |
| 3142 | |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3143 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
| 3144 | clp->cl_name.len, clp->cl_name.data, |
| 3145 | clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3146 | |
| 3147 | /* find clp->cl_name in reclaim_str_hashtbl */ |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3148 | strhashval = clientstr_hashval(clp->cl_recdir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3149 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
NeilBrown | a55370a | 2005-06-23 22:03:52 -0700 | [diff] [blame^] | 3150 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3151 | return crp; |
| 3152 | } |
| 3153 | } |
| 3154 | return NULL; |
| 3155 | } |
| 3156 | |
| 3157 | /* |
| 3158 | * Called from OPEN. Look for clientid in reclaim list. |
| 3159 | */ |
| 3160 | int |
| 3161 | nfs4_check_open_reclaim(clientid_t *clid) |
| 3162 | { |
NeilBrown | dfc8356 | 2005-06-23 22:03:16 -0700 | [diff] [blame] | 3163 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3164 | } |
| 3165 | |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3166 | /* initialization to perform at module load time: */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3167 | |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3168 | void |
| 3169 | nfs4_state_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3170 | { |
| 3171 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3172 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3173 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3174 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); |
| 3175 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); |
| 3176 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); |
| 3177 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); |
| 3178 | } |
| 3179 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
| 3180 | INIT_LIST_HEAD(&file_hashtbl[i]); |
| 3181 | } |
| 3182 | for (i = 0; i < OWNER_HASH_SIZE; i++) { |
| 3183 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); |
| 3184 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); |
| 3185 | } |
| 3186 | for (i = 0; i < STATEID_HASH_SIZE; i++) { |
| 3187 | INIT_LIST_HEAD(&stateid_hashtbl[i]); |
| 3188 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); |
| 3189 | } |
| 3190 | for (i = 0; i < LOCK_HASH_SIZE; i++) { |
| 3191 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); |
| 3192 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); |
| 3193 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3194 | memset(&onestateid, ~0, sizeof(stateid_t)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3195 | INIT_LIST_HEAD(&close_lru); |
| 3196 | INIT_LIST_HEAD(&client_lru); |
| 3197 | INIT_LIST_HEAD(&del_recall_lru); |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3198 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
| 3199 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
| 3200 | reclaim_str_hashtbl_size = 0; |
NeilBrown | ac4d8ff | 2005-06-23 22:03:30 -0700 | [diff] [blame] | 3201 | } |
| 3202 | |
| 3203 | /* initialization to perform when the nfsd service is started: */ |
| 3204 | |
| 3205 | static void |
| 3206 | __nfs4_state_start(void) |
| 3207 | { |
| 3208 | time_t grace_time; |
| 3209 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3210 | boot_time = get_seconds(); |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3211 | grace_time = max(user_lease_time, lease_time); |
| 3212 | lease_time = user_lease_time; |
| 3213 | printk("NFSD: starting %ld-second grace period\n", grace_time); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3214 | grace_end = boot_time + grace_time; |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3215 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
| 3216 | queue_delayed_work(laundry_wq, &laundromat_work, NFSD_LEASE_TIME*HZ); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3217 | } |
| 3218 | |
| 3219 | int |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3220 | nfs4_state_start(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3221 | { |
| 3222 | int status; |
| 3223 | |
| 3224 | if (nfs4_init) |
| 3225 | return 0; |
| 3226 | status = nfsd4_init_slabs(); |
| 3227 | if (status) |
| 3228 | return status; |
NeilBrown | 76a3550 | 2005-06-23 22:03:26 -0700 | [diff] [blame] | 3229 | __nfs4_state_start(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3230 | nfs4_init = 1; |
| 3231 | return 0; |
| 3232 | } |
| 3233 | |
| 3234 | int |
| 3235 | nfs4_in_grace(void) |
| 3236 | { |
| 3237 | return get_seconds() < grace_end; |
| 3238 | } |
| 3239 | |
| 3240 | void |
| 3241 | set_no_grace(void) |
| 3242 | { |
| 3243 | printk("NFSD: ERROR in reboot recovery. State reclaims will fail.\n"); |
| 3244 | grace_end = get_seconds(); |
| 3245 | } |
| 3246 | |
| 3247 | time_t |
| 3248 | nfs4_lease_time(void) |
| 3249 | { |
| 3250 | return lease_time; |
| 3251 | } |
| 3252 | |
| 3253 | static void |
| 3254 | __nfs4_state_shutdown(void) |
| 3255 | { |
| 3256 | int i; |
| 3257 | struct nfs4_client *clp = NULL; |
| 3258 | struct nfs4_delegation *dp = NULL; |
| 3259 | struct nfs4_stateowner *sop = NULL; |
| 3260 | struct list_head *pos, *next, reaplist; |
| 3261 | |
| 3262 | list_for_each_safe(pos, next, &close_lru) { |
| 3263 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); |
| 3264 | list_del(&sop->so_close_lru); |
| 3265 | nfs4_put_stateowner(sop); |
| 3266 | } |
| 3267 | |
| 3268 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
| 3269 | while (!list_empty(&conf_id_hashtbl[i])) { |
| 3270 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); |
| 3271 | expire_client(clp); |
| 3272 | } |
| 3273 | while (!list_empty(&unconf_str_hashtbl[i])) { |
| 3274 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); |
| 3275 | expire_client(clp); |
| 3276 | } |
| 3277 | } |
| 3278 | INIT_LIST_HEAD(&reaplist); |
| 3279 | spin_lock(&recall_lock); |
| 3280 | list_for_each_safe(pos, next, &del_recall_lru) { |
| 3281 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3282 | list_move(&dp->dl_recall_lru, &reaplist); |
| 3283 | } |
| 3284 | spin_unlock(&recall_lock); |
| 3285 | list_for_each_safe(pos, next, &reaplist) { |
| 3286 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); |
| 3287 | list_del_init(&dp->dl_recall_lru); |
| 3288 | unhash_delegation(dp); |
| 3289 | } |
| 3290 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3291 | cancel_delayed_work(&laundromat_work); |
NeilBrown | 58da282 | 2005-06-23 22:03:19 -0700 | [diff] [blame] | 3292 | flush_workqueue(laundry_wq); |
| 3293 | destroy_workqueue(laundry_wq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3294 | nfs4_init = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3295 | } |
| 3296 | |
| 3297 | void |
| 3298 | nfs4_state_shutdown(void) |
| 3299 | { |
| 3300 | nfs4_lock_state(); |
| 3301 | nfs4_release_reclaim(); |
| 3302 | __nfs4_state_shutdown(); |
| 3303 | nfsd4_free_slabs(); |
| 3304 | nfs4_unlock_state(); |
| 3305 | } |
| 3306 | |
| 3307 | /* |
| 3308 | * Called when leasetime is changed. |
| 3309 | * |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3310 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
| 3311 | * simulate a reboot. Instead of doing that, we just wait till the next time |
| 3312 | * we start to register any changes in lease time. If the administrator |
| 3313 | * really wants to change the lease time *now*, they can go ahead and bring |
| 3314 | * nfsd down and then back up again after changing the lease time. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3315 | */ |
| 3316 | void |
| 3317 | nfs4_reset_lease(time_t leasetime) |
| 3318 | { |
NeilBrown | d99a05a | 2005-06-23 22:03:21 -0700 | [diff] [blame] | 3319 | lock_kernel(); |
| 3320 | user_lease_time = leasetime; |
| 3321 | unlock_kernel(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3322 | } |