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1da177e4 LT |
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> | |
aceaf78d | 44 | #include <linux/file.h> |
1da177e4 LT |
45 | #include <linux/mount.h> |
46 | #include <linux/workqueue.h> | |
47 | #include <linux/smp_lock.h> | |
48 | #include <linux/kthread.h> | |
49 | #include <linux/nfs4.h> | |
50 | #include <linux/nfsd/state.h> | |
51 | #include <linux/nfsd/xdr4.h> | |
0964a3d3 | 52 | #include <linux/namei.h> |
c2f1a551 | 53 | #include <linux/swap.h> |
353ab6e9 | 54 | #include <linux/mutex.h> |
fd85b817 | 55 | #include <linux/lockd/bind.h> |
9a8db97e | 56 | #include <linux/module.h> |
68e76ad0 | 57 | #include <linux/sunrpc/svcauth_gss.h> |
1da177e4 LT |
58 | |
59 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
60 | ||
61 | /* Globals */ | |
62 | static time_t lease_time = 90; /* default lease time */ | |
d99a05ad | 63 | static time_t user_lease_time = 90; |
fd39ca9a | 64 | static time_t boot_time; |
1da177e4 LT |
65 | static u32 current_ownerid = 1; |
66 | static u32 current_fileid = 1; | |
67 | static u32 current_delegid = 1; | |
68 | static u32 nfs4_init; | |
fd39ca9a N |
69 | static stateid_t zerostateid; /* bits all 0 */ |
70 | static stateid_t onestateid; /* bits all 1 */ | |
71 | ||
72 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
73 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 74 | |
1da177e4 | 75 | /* forward declarations */ |
fd39ca9a | 76 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 77 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
78 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
79 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 LT |
80 | |
81 | /* Locking: | |
82 | * | |
353ab6e9 | 83 | * client_mutex: |
1da177e4 LT |
84 | * protects clientid_hashtbl[], clientstr_hashtbl[], |
85 | * unconfstr_hashtbl[], uncofid_hashtbl[]. | |
86 | */ | |
353ab6e9 | 87 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 88 | |
e18b890b CL |
89 | static struct kmem_cache *stateowner_slab = NULL; |
90 | static struct kmem_cache *file_slab = NULL; | |
91 | static struct kmem_cache *stateid_slab = NULL; | |
92 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 93 | |
1da177e4 LT |
94 | void |
95 | nfs4_lock_state(void) | |
96 | { | |
353ab6e9 | 97 | mutex_lock(&client_mutex); |
1da177e4 LT |
98 | } |
99 | ||
100 | void | |
101 | nfs4_unlock_state(void) | |
102 | { | |
353ab6e9 | 103 | mutex_unlock(&client_mutex); |
1da177e4 LT |
104 | } |
105 | ||
106 | static inline u32 | |
107 | opaque_hashval(const void *ptr, int nbytes) | |
108 | { | |
109 | unsigned char *cptr = (unsigned char *) ptr; | |
110 | ||
111 | u32 x = 0; | |
112 | while (nbytes--) { | |
113 | x *= 37; | |
114 | x += *cptr++; | |
115 | } | |
116 | return x; | |
117 | } | |
118 | ||
1da177e4 LT |
119 | /* |
120 | * Delegation state | |
121 | */ | |
122 | ||
123 | /* recall_lock protects the del_recall_lru */ | |
34af946a | 124 | static DEFINE_SPINLOCK(recall_lock); |
1da177e4 LT |
125 | static struct list_head del_recall_lru; |
126 | ||
13cd2184 N |
127 | static void |
128 | free_nfs4_file(struct kref *kref) | |
129 | { | |
130 | struct nfs4_file *fp = container_of(kref, struct nfs4_file, fi_ref); | |
131 | list_del(&fp->fi_hash); | |
132 | iput(fp->fi_inode); | |
133 | kmem_cache_free(file_slab, fp); | |
134 | } | |
135 | ||
136 | static inline void | |
137 | put_nfs4_file(struct nfs4_file *fi) | |
138 | { | |
139 | kref_put(&fi->fi_ref, free_nfs4_file); | |
140 | } | |
141 | ||
142 | static inline void | |
143 | get_nfs4_file(struct nfs4_file *fi) | |
144 | { | |
145 | kref_get(&fi->fi_ref); | |
146 | } | |
147 | ||
ef0f3390 | 148 | static int num_delegations; |
c2f1a551 | 149 | unsigned int max_delegations; |
ef0f3390 N |
150 | |
151 | /* | |
152 | * Open owner state (share locks) | |
153 | */ | |
154 | ||
155 | /* hash tables for nfs4_stateowner */ | |
156 | #define OWNER_HASH_BITS 8 | |
157 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
158 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
159 | ||
160 | #define ownerid_hashval(id) \ | |
161 | ((id) & OWNER_HASH_MASK) | |
162 | #define ownerstr_hashval(clientid, ownername) \ | |
163 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
164 | ||
165 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
166 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
167 | ||
168 | /* hash table for nfs4_file */ | |
169 | #define FILE_HASH_BITS 8 | |
170 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
171 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
172 | /* hash table for (open)nfs4_stateid */ | |
173 | #define STATEID_HASH_BITS 10 | |
174 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
175 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
176 | ||
177 | #define file_hashval(x) \ | |
178 | hash_ptr(x, FILE_HASH_BITS) | |
179 | #define stateid_hashval(owner_id, file_id) \ | |
180 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
181 | ||
182 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
183 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
184 | ||
1da177e4 LT |
185 | static struct nfs4_delegation * |
186 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
187 | { | |
188 | struct nfs4_delegation *dp; | |
189 | struct nfs4_file *fp = stp->st_file; | |
190 | struct nfs4_callback *cb = &stp->st_stateowner->so_client->cl_callback; | |
191 | ||
192 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
193 | if (fp->fi_had_conflict) |
194 | return NULL; | |
c2f1a551 | 195 | if (num_delegations > max_delegations) |
ef0f3390 | 196 | return NULL; |
5b2d21c1 N |
197 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
198 | if (dp == NULL) | |
1da177e4 | 199 | return dp; |
ef0f3390 | 200 | num_delegations++; |
ea1da636 N |
201 | INIT_LIST_HEAD(&dp->dl_perfile); |
202 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
203 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
204 | dp->dl_client = clp; | |
13cd2184 | 205 | get_nfs4_file(fp); |
1da177e4 LT |
206 | dp->dl_file = fp; |
207 | dp->dl_flock = NULL; | |
208 | get_file(stp->st_vfs_file); | |
209 | dp->dl_vfs_file = stp->st_vfs_file; | |
210 | dp->dl_type = type; | |
211 | dp->dl_recall.cbr_dp = NULL; | |
212 | dp->dl_recall.cbr_ident = cb->cb_ident; | |
213 | dp->dl_recall.cbr_trunc = 0; | |
214 | dp->dl_stateid.si_boot = boot_time; | |
215 | dp->dl_stateid.si_stateownerid = current_delegid++; | |
216 | dp->dl_stateid.si_fileid = 0; | |
217 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 218 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
219 | dp->dl_time = 0; |
220 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
221 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
222 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
1da177e4 LT |
223 | return dp; |
224 | } | |
225 | ||
226 | void | |
227 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
228 | { | |
229 | if (atomic_dec_and_test(&dp->dl_count)) { | |
230 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 231 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 232 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 233 | num_delegations--; |
1da177e4 LT |
234 | } |
235 | } | |
236 | ||
237 | /* Remove the associated file_lock first, then remove the delegation. | |
238 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
239 | * the i_flock list, eventually calling nfsd's lock_manager | |
240 | * fl_release_callback. | |
241 | */ | |
242 | static void | |
243 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
244 | { | |
245 | struct file *filp = dp->dl_vfs_file; | |
246 | ||
247 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
248 | dp->dl_vfs_file = NULL; | |
249 | /* The following nfsd_close may not actually close the file, | |
250 | * but we want to remove the lease in any case. */ | |
c907132d | 251 | if (dp->dl_flock) |
a9933cea | 252 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 253 | nfsd_close(filp); |
1da177e4 LT |
254 | } |
255 | ||
256 | /* Called under the state lock. */ | |
257 | static void | |
258 | unhash_delegation(struct nfs4_delegation *dp) | |
259 | { | |
ea1da636 N |
260 | list_del_init(&dp->dl_perfile); |
261 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
262 | spin_lock(&recall_lock); |
263 | list_del_init(&dp->dl_recall_lru); | |
264 | spin_unlock(&recall_lock); | |
265 | nfs4_close_delegation(dp); | |
266 | nfs4_put_delegation(dp); | |
267 | } | |
268 | ||
269 | /* | |
270 | * SETCLIENTID state | |
271 | */ | |
272 | ||
273 | /* Hash tables for nfs4_clientid state */ | |
274 | #define CLIENT_HASH_BITS 4 | |
275 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
276 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
277 | ||
278 | #define clientid_hashval(id) \ | |
279 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
280 | #define clientstr_hashval(name) \ |
281 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
282 | /* |
283 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
284 | * used in reboot/reset lease grace period processing | |
285 | * | |
286 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
287 | * setclientid_confirmed info. | |
288 | * | |
289 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
290 | * setclientid info. | |
291 | * | |
292 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
293 | * for lease renewal. | |
294 | * | |
295 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
296 | * for last close replay. | |
297 | */ | |
298 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
299 | static int reclaim_str_hashtbl_size = 0; | |
300 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
301 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
302 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
303 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
304 | static struct list_head client_lru; | |
305 | static struct list_head close_lru; | |
306 | ||
2283963f BF |
307 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
308 | { | |
309 | list_del(&stp->st_hash); | |
310 | list_del(&stp->st_perfile); | |
311 | list_del(&stp->st_perstateowner); | |
312 | } | |
313 | ||
314 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
315 | { | |
316 | put_nfs4_file(stp->st_file); | |
317 | kmem_cache_free(stateid_slab, stp); | |
318 | } | |
319 | ||
320 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
321 | { | |
322 | unhash_generic_stateid(stp); | |
323 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
324 | free_generic_stateid(stp); | |
325 | } | |
326 | ||
f044ff83 BF |
327 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
328 | { | |
329 | struct nfs4_stateid *stp; | |
330 | ||
331 | list_del(&sop->so_idhash); | |
332 | list_del(&sop->so_strhash); | |
333 | list_del(&sop->so_perstateid); | |
334 | while (!list_empty(&sop->so_stateids)) { | |
335 | stp = list_first_entry(&sop->so_stateids, | |
336 | struct nfs4_stateid, st_perstateowner); | |
337 | release_lock_stateid(stp); | |
338 | } | |
339 | } | |
340 | ||
341 | static void release_lockowner(struct nfs4_stateowner *sop) | |
342 | { | |
343 | unhash_lockowner(sop); | |
344 | nfs4_put_stateowner(sop); | |
345 | } | |
346 | ||
f1d110ca BF |
347 | static void |
348 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
349 | { | |
350 | struct nfs4_stateowner *lock_sop; | |
351 | ||
352 | while (!list_empty(&open_stp->st_lockowners)) { | |
353 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
354 | struct nfs4_stateowner, so_perstateid); | |
355 | /* list_del(&open_stp->st_lockowners); */ | |
356 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 357 | release_lockowner(lock_sop); |
f1d110ca BF |
358 | } |
359 | } | |
360 | ||
2283963f BF |
361 | static void release_open_stateid(struct nfs4_stateid *stp) |
362 | { | |
363 | unhash_generic_stateid(stp); | |
364 | release_stateid_lockowners(stp); | |
365 | nfsd_close(stp->st_vfs_file); | |
366 | free_generic_stateid(stp); | |
367 | } | |
368 | ||
f044ff83 | 369 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
370 | { |
371 | struct nfs4_stateid *stp; | |
372 | ||
373 | list_del(&sop->so_idhash); | |
374 | list_del(&sop->so_strhash); | |
f044ff83 BF |
375 | list_del(&sop->so_perclient); |
376 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 377 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
378 | stp = list_first_entry(&sop->so_stateids, |
379 | struct nfs4_stateid, st_perstateowner); | |
380 | release_open_stateid(stp); | |
f1d110ca BF |
381 | } |
382 | } | |
383 | ||
f044ff83 | 384 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 385 | { |
f044ff83 | 386 | unhash_openowner(sop); |
f1d110ca BF |
387 | list_del(&sop->so_close_lru); |
388 | nfs4_put_stateowner(sop); | |
389 | } | |
390 | ||
1da177e4 LT |
391 | static inline void |
392 | renew_client(struct nfs4_client *clp) | |
393 | { | |
394 | /* | |
395 | * Move client to the end to the LRU list. | |
396 | */ | |
397 | dprintk("renewing client (clientid %08x/%08x)\n", | |
398 | clp->cl_clientid.cl_boot, | |
399 | clp->cl_clientid.cl_id); | |
400 | list_move_tail(&clp->cl_lru, &client_lru); | |
401 | clp->cl_time = get_seconds(); | |
402 | } | |
403 | ||
404 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
405 | static int | |
406 | STALE_CLIENTID(clientid_t *clid) | |
407 | { | |
408 | if (clid->cl_boot == boot_time) | |
409 | return 0; | |
410 | dprintk("NFSD stale clientid (%08x/%08x)\n", | |
411 | clid->cl_boot, clid->cl_id); | |
412 | return 1; | |
413 | } | |
414 | ||
415 | /* | |
416 | * XXX Should we use a slab cache ? | |
417 | * This type of memory management is somewhat inefficient, but we use it | |
418 | * anyway since SETCLIENTID is not a common operation. | |
419 | */ | |
35bba9a3 | 420 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
421 | { |
422 | struct nfs4_client *clp; | |
423 | ||
35bba9a3 BF |
424 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
425 | if (clp == NULL) | |
426 | return NULL; | |
427 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
428 | if (clp->cl_name.data == NULL) { | |
429 | kfree(clp); | |
430 | return NULL; | |
1da177e4 | 431 | } |
35bba9a3 BF |
432 | memcpy(clp->cl_name.data, name.data, name.len); |
433 | clp->cl_name.len = name.len; | |
1da177e4 LT |
434 | return clp; |
435 | } | |
436 | ||
1b1a9b31 BF |
437 | static void |
438 | shutdown_callback_client(struct nfs4_client *clp) | |
439 | { | |
440 | struct rpc_clnt *clnt = clp->cl_callback.cb_client; | |
441 | ||
1b1a9b31 | 442 | if (clnt) { |
404ec117 BF |
443 | /* |
444 | * Callback threads take a reference on the client, so there | |
445 | * should be no outstanding callbacks at this point. | |
446 | */ | |
1b1a9b31 BF |
447 | clp->cl_callback.cb_client = NULL; |
448 | rpc_shutdown_client(clnt); | |
449 | } | |
450 | } | |
451 | ||
1da177e4 LT |
452 | static inline void |
453 | free_client(struct nfs4_client *clp) | |
454 | { | |
1b1a9b31 | 455 | shutdown_callback_client(clp); |
1da177e4 LT |
456 | if (clp->cl_cred.cr_group_info) |
457 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 458 | kfree(clp->cl_principal); |
1da177e4 LT |
459 | kfree(clp->cl_name.data); |
460 | kfree(clp); | |
461 | } | |
462 | ||
463 | void | |
464 | put_nfs4_client(struct nfs4_client *clp) | |
465 | { | |
466 | if (atomic_dec_and_test(&clp->cl_count)) | |
467 | free_client(clp); | |
468 | } | |
469 | ||
470 | static void | |
471 | expire_client(struct nfs4_client *clp) | |
472 | { | |
473 | struct nfs4_stateowner *sop; | |
474 | struct nfs4_delegation *dp; | |
1da177e4 LT |
475 | struct list_head reaplist; |
476 | ||
477 | dprintk("NFSD: expire_client cl_count %d\n", | |
478 | atomic_read(&clp->cl_count)); | |
479 | ||
1da177e4 LT |
480 | INIT_LIST_HEAD(&reaplist); |
481 | spin_lock(&recall_lock); | |
ea1da636 N |
482 | while (!list_empty(&clp->cl_delegations)) { |
483 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
484 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
485 | dp->dl_flock); | |
ea1da636 | 486 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
487 | list_move(&dp->dl_recall_lru, &reaplist); |
488 | } | |
489 | spin_unlock(&recall_lock); | |
490 | while (!list_empty(&reaplist)) { | |
491 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
492 | list_del_init(&dp->dl_recall_lru); | |
493 | unhash_delegation(dp); | |
494 | } | |
495 | list_del(&clp->cl_idhash); | |
496 | list_del(&clp->cl_strhash); | |
497 | list_del(&clp->cl_lru); | |
ea1da636 N |
498 | while (!list_empty(&clp->cl_openowners)) { |
499 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 500 | release_openowner(sop); |
1da177e4 LT |
501 | } |
502 | put_nfs4_client(clp); | |
503 | } | |
504 | ||
35bba9a3 BF |
505 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir) |
506 | { | |
1da177e4 LT |
507 | struct nfs4_client *clp; |
508 | ||
35bba9a3 BF |
509 | clp = alloc_client(name); |
510 | if (clp == NULL) | |
511 | return NULL; | |
a55370a3 | 512 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); |
1da177e4 LT |
513 | atomic_set(&clp->cl_count, 1); |
514 | atomic_set(&clp->cl_callback.cb_set, 0); | |
1da177e4 LT |
515 | INIT_LIST_HEAD(&clp->cl_idhash); |
516 | INIT_LIST_HEAD(&clp->cl_strhash); | |
ea1da636 N |
517 | INIT_LIST_HEAD(&clp->cl_openowners); |
518 | INIT_LIST_HEAD(&clp->cl_delegations); | |
1da177e4 | 519 | INIT_LIST_HEAD(&clp->cl_lru); |
1da177e4 LT |
520 | return clp; |
521 | } | |
522 | ||
35bba9a3 BF |
523 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
524 | { | |
525 | memcpy(target->cl_verifier.data, source->data, | |
526 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
527 | } |
528 | ||
35bba9a3 BF |
529 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
530 | { | |
1da177e4 LT |
531 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
532 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
533 | } | |
534 | ||
35bba9a3 BF |
535 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
536 | { | |
1da177e4 LT |
537 | target->cr_uid = source->cr_uid; |
538 | target->cr_gid = source->cr_gid; | |
539 | target->cr_group_info = source->cr_group_info; | |
540 | get_group_info(target->cr_group_info); | |
541 | } | |
542 | ||
35bba9a3 | 543 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 544 | { |
a55370a3 | 545 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
546 | } |
547 | ||
548 | static int | |
599e0a22 BF |
549 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
550 | { | |
551 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
552 | } |
553 | ||
554 | static int | |
599e0a22 BF |
555 | same_clid(clientid_t *cl1, clientid_t *cl2) |
556 | { | |
557 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
558 | } |
559 | ||
560 | /* XXX what about NGROUP */ | |
561 | static int | |
599e0a22 BF |
562 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
563 | { | |
564 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
565 | } |
566 | ||
5ec7b46c BF |
567 | static void gen_clid(struct nfs4_client *clp) |
568 | { | |
569 | static u32 current_clientid = 1; | |
570 | ||
1da177e4 LT |
571 | clp->cl_clientid.cl_boot = boot_time; |
572 | clp->cl_clientid.cl_id = current_clientid++; | |
573 | } | |
574 | ||
deda2faa BF |
575 | static void gen_confirm(struct nfs4_client *clp) |
576 | { | |
577 | static u32 i; | |
578 | u32 *p; | |
1da177e4 | 579 | |
1da177e4 | 580 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
581 | *p++ = get_seconds(); |
582 | *p++ = i++; | |
1da177e4 LT |
583 | } |
584 | ||
35bba9a3 BF |
585 | static int check_name(struct xdr_netobj name) |
586 | { | |
1da177e4 LT |
587 | if (name.len == 0) |
588 | return 0; | |
589 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 590 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
591 | return 0; |
592 | } | |
593 | return 1; | |
594 | } | |
595 | ||
fd39ca9a | 596 | static void |
1da177e4 LT |
597 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
598 | { | |
599 | unsigned int idhashval; | |
600 | ||
601 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
602 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
603 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
604 | list_add_tail(&clp->cl_lru, &client_lru); | |
605 | clp->cl_time = get_seconds(); | |
606 | } | |
607 | ||
fd39ca9a | 608 | static void |
1da177e4 LT |
609 | move_to_confirmed(struct nfs4_client *clp) |
610 | { | |
611 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
612 | unsigned int strhashval; | |
613 | ||
614 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
615 | list_del_init(&clp->cl_strhash); | |
f116629d | 616 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 617 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
618 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
619 | renew_client(clp); | |
620 | } | |
621 | ||
622 | static struct nfs4_client * | |
623 | find_confirmed_client(clientid_t *clid) | |
624 | { | |
625 | struct nfs4_client *clp; | |
626 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
627 | ||
628 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 629 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
630 | return clp; |
631 | } | |
632 | return NULL; | |
633 | } | |
634 | ||
635 | static struct nfs4_client * | |
636 | find_unconfirmed_client(clientid_t *clid) | |
637 | { | |
638 | struct nfs4_client *clp; | |
639 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
640 | ||
641 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 642 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
643 | return clp; |
644 | } | |
645 | return NULL; | |
646 | } | |
647 | ||
28ce6054 N |
648 | static struct nfs4_client * |
649 | find_confirmed_client_by_str(const char *dname, unsigned int hashval) | |
650 | { | |
651 | struct nfs4_client *clp; | |
652 | ||
653 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
654 | if (same_name(clp->cl_recdir, dname)) | |
655 | return clp; | |
656 | } | |
657 | return NULL; | |
658 | } | |
659 | ||
660 | static struct nfs4_client * | |
661 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval) | |
662 | { | |
663 | struct nfs4_client *clp; | |
664 | ||
665 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
666 | if (same_name(clp->cl_recdir, dname)) | |
667 | return clp; | |
668 | } | |
669 | return NULL; | |
670 | } | |
671 | ||
1da177e4 LT |
672 | /* a helper function for parse_callback */ |
673 | static int | |
674 | parse_octet(unsigned int *lenp, char **addrp) | |
675 | { | |
676 | unsigned int len = *lenp; | |
677 | char *p = *addrp; | |
678 | int n = -1; | |
679 | char c; | |
680 | ||
681 | for (;;) { | |
682 | if (!len) | |
683 | break; | |
684 | len--; | |
685 | c = *p++; | |
686 | if (c == '.') | |
687 | break; | |
688 | if ((c < '0') || (c > '9')) { | |
689 | n = -1; | |
690 | break; | |
691 | } | |
692 | if (n < 0) | |
693 | n = 0; | |
694 | n = (n * 10) + (c - '0'); | |
695 | if (n > 255) { | |
696 | n = -1; | |
697 | break; | |
698 | } | |
699 | } | |
700 | *lenp = len; | |
701 | *addrp = p; | |
702 | return n; | |
703 | } | |
704 | ||
705 | /* parse and set the setclientid ipv4 callback address */ | |
fd39ca9a | 706 | static int |
1da177e4 LT |
707 | parse_ipv4(unsigned int addr_len, char *addr_val, unsigned int *cbaddrp, unsigned short *cbportp) |
708 | { | |
709 | int temp = 0; | |
710 | u32 cbaddr = 0; | |
711 | u16 cbport = 0; | |
712 | u32 addrlen = addr_len; | |
713 | char *addr = addr_val; | |
714 | int i, shift; | |
715 | ||
716 | /* ipaddress */ | |
717 | shift = 24; | |
718 | for(i = 4; i > 0 ; i--) { | |
719 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
720 | return 0; | |
721 | } | |
722 | cbaddr |= (temp << shift); | |
723 | if (shift > 0) | |
724 | shift -= 8; | |
725 | } | |
726 | *cbaddrp = cbaddr; | |
727 | ||
728 | /* port */ | |
729 | shift = 8; | |
730 | for(i = 2; i > 0 ; i--) { | |
731 | if ((temp = parse_octet(&addrlen, &addr)) < 0) { | |
732 | return 0; | |
733 | } | |
734 | cbport |= (temp << shift); | |
735 | if (shift > 0) | |
736 | shift -= 8; | |
737 | } | |
738 | *cbportp = cbport; | |
739 | return 1; | |
740 | } | |
741 | ||
fd39ca9a | 742 | static void |
1da177e4 LT |
743 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se) |
744 | { | |
745 | struct nfs4_callback *cb = &clp->cl_callback; | |
746 | ||
747 | /* Currently, we only support tcp for the callback channel */ | |
748 | if ((se->se_callback_netid_len != 3) || memcmp((char *)se->se_callback_netid_val, "tcp", 3)) | |
749 | goto out_err; | |
750 | ||
751 | if ( !(parse_ipv4(se->se_callback_addr_len, se->se_callback_addr_val, | |
752 | &cb->cb_addr, &cb->cb_port))) | |
753 | goto out_err; | |
754 | cb->cb_prog = se->se_callback_prog; | |
755 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
756 | return; |
757 | out_err: | |
849823c5 | 758 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
759 | "will not receive delegations\n", |
760 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
761 | ||
1da177e4 LT |
762 | return; |
763 | } | |
764 | ||
b37ad28b | 765 | __be32 |
b591480b BF |
766 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
767 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 768 | { |
27459f09 | 769 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
1da177e4 LT |
770 | struct xdr_netobj clname = { |
771 | .len = setclid->se_namelen, | |
772 | .data = setclid->se_name, | |
773 | }; | |
774 | nfs4_verifier clverifier = setclid->se_verf; | |
775 | unsigned int strhashval; | |
28ce6054 | 776 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 777 | __be32 status; |
68e76ad0 | 778 | char *princ; |
a55370a3 | 779 | char dname[HEXDIR_LEN]; |
1da177e4 | 780 | |
1da177e4 | 781 | if (!check_name(clname)) |
73aea4ec | 782 | return nfserr_inval; |
1da177e4 | 783 | |
a55370a3 N |
784 | status = nfs4_make_rec_clidname(dname, &clname); |
785 | if (status) | |
73aea4ec | 786 | return status; |
a55370a3 | 787 | |
1da177e4 LT |
788 | /* |
789 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
790 | * We get here on a DRC miss. | |
791 | */ | |
792 | ||
a55370a3 | 793 | strhashval = clientstr_hashval(dname); |
1da177e4 | 794 | |
1da177e4 | 795 | nfs4_lock_state(); |
28ce6054 N |
796 | conf = find_confirmed_client_by_str(dname, strhashval); |
797 | if (conf) { | |
a186e767 | 798 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 799 | status = nfserr_clid_inuse; |
599e0a22 | 800 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred) |
27459f09 | 801 | || conf->cl_addr != sin->sin_addr.s_addr) { |
be859405 HH |
802 | dprintk("NFSD: setclientid: string in use by clientat %pI4\n", |
803 | &conf->cl_addr); | |
1da177e4 LT |
804 | goto out; |
805 | } | |
1da177e4 | 806 | } |
a186e767 BF |
807 | /* |
808 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
809 | * has a description of SETCLIENTID request processing consisting | |
810 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
811 | */ | |
28ce6054 | 812 | unconf = find_unconfirmed_client_by_str(dname, strhashval); |
1da177e4 LT |
813 | status = nfserr_resource; |
814 | if (!conf) { | |
a186e767 BF |
815 | /* |
816 | * RFC 3530 14.2.33 CASE 4: | |
817 | * placed first, because it is the normal case | |
1da177e4 LT |
818 | */ |
819 | if (unconf) | |
820 | expire_client(unconf); | |
a55370a3 N |
821 | new = create_client(clname, dname); |
822 | if (new == NULL) | |
1da177e4 | 823 | goto out; |
1da177e4 | 824 | gen_clid(new); |
599e0a22 | 825 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 826 | /* |
a186e767 BF |
827 | * RFC 3530 14.2.33 CASE 1: |
828 | * probable callback update | |
1da177e4 | 829 | */ |
31f4a6c1 N |
830 | if (unconf) { |
831 | /* Note this is removing unconfirmed {*x***}, | |
832 | * which is stronger than RFC recommended {vxc**}. | |
833 | * This has the advantage that there is at most | |
834 | * one {*x***} in either list at any time. | |
835 | */ | |
836 | expire_client(unconf); | |
1da177e4 | 837 | } |
a55370a3 N |
838 | new = create_client(clname, dname); |
839 | if (new == NULL) | |
1da177e4 | 840 | goto out; |
1da177e4 | 841 | copy_clid(new, conf); |
1da177e4 LT |
842 | } else if (!unconf) { |
843 | /* | |
a186e767 BF |
844 | * RFC 3530 14.2.33 CASE 2: |
845 | * probable client reboot; state will be removed if | |
846 | * confirmed. | |
1da177e4 | 847 | */ |
a55370a3 N |
848 | new = create_client(clname, dname); |
849 | if (new == NULL) | |
1da177e4 | 850 | goto out; |
1da177e4 | 851 | gen_clid(new); |
49ba8781 | 852 | } else { |
a186e767 BF |
853 | /* |
854 | * RFC 3530 14.2.33 CASE 3: | |
855 | * probable client reboot; state will be removed if | |
856 | * confirmed. | |
1da177e4 LT |
857 | */ |
858 | expire_client(unconf); | |
a55370a3 N |
859 | new = create_client(clname, dname); |
860 | if (new == NULL) | |
1da177e4 | 861 | goto out; |
1da177e4 | 862 | gen_clid(new); |
1da177e4 | 863 | } |
c175b83c BF |
864 | copy_verf(new, &clverifier); |
865 | new->cl_addr = sin->sin_addr.s_addr; | |
61054b14 | 866 | new->cl_flavor = rqstp->rq_flavor; |
68e76ad0 OK |
867 | princ = svc_gss_principal(rqstp); |
868 | if (princ) { | |
869 | new->cl_principal = kstrdup(princ, GFP_KERNEL); | |
870 | if (new->cl_principal == NULL) { | |
871 | free_client(new); | |
872 | goto out; | |
873 | } | |
874 | } | |
c175b83c BF |
875 | copy_cred(&new->cl_cred, &rqstp->rq_cred); |
876 | gen_confirm(new); | |
877 | gen_callback(new, setclid); | |
878 | add_to_unconfirmed(new, strhashval); | |
1da177e4 LT |
879 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
880 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
881 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
882 | status = nfs_ok; | |
883 | out: | |
884 | nfs4_unlock_state(); | |
885 | return status; | |
886 | } | |
887 | ||
888 | ||
889 | /* | |
a186e767 BF |
890 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
891 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
892 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 893 | */ |
b37ad28b | 894 | __be32 |
b591480b BF |
895 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
896 | struct nfsd4_compound_state *cstate, | |
897 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 898 | { |
27459f09 | 899 | struct sockaddr_in *sin = svc_addr_in(rqstp); |
21ab45a4 | 900 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
901 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
902 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 903 | __be32 status; |
1da177e4 LT |
904 | |
905 | if (STALE_CLIENTID(clid)) | |
906 | return nfserr_stale_clientid; | |
907 | /* | |
908 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
909 | * We get here on a DRC miss. | |
910 | */ | |
911 | ||
912 | nfs4_lock_state(); | |
21ab45a4 N |
913 | |
914 | conf = find_confirmed_client(clid); | |
915 | unconf = find_unconfirmed_client(clid); | |
916 | ||
917 | status = nfserr_clid_inuse; | |
27459f09 | 918 | if (conf && conf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 | 919 | goto out; |
27459f09 | 920 | if (unconf && unconf->cl_addr != sin->sin_addr.s_addr) |
21ab45a4 N |
921 | goto out; |
922 | ||
a186e767 BF |
923 | /* |
924 | * section 14.2.34 of RFC 3530 has a description of | |
925 | * SETCLIENTID_CONFIRM request processing consisting | |
926 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
927 | */ | |
366e0c1d | 928 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
929 | /* |
930 | * RFC 3530 14.2.34 CASE 1: | |
931 | * callback update | |
932 | */ | |
599e0a22 | 933 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
934 | status = nfserr_clid_inuse; |
935 | else { | |
1a69c179 N |
936 | /* XXX: We just turn off callbacks until we can handle |
937 | * change request correctly. */ | |
cb36d634 | 938 | atomic_set(&conf->cl_callback.cb_set, 0); |
21ab45a4 | 939 | gen_confirm(conf); |
46309029 | 940 | nfsd4_remove_clid_dir(unconf); |
1a69c179 | 941 | expire_client(unconf); |
1da177e4 | 942 | status = nfs_ok; |
1a69c179 | 943 | |
1da177e4 | 944 | } |
f3aba4e5 | 945 | } else if (conf && !unconf) { |
a186e767 BF |
946 | /* |
947 | * RFC 3530 14.2.34 CASE 2: | |
948 | * probable retransmitted request; play it safe and | |
949 | * do nothing. | |
7c79f737 | 950 | */ |
599e0a22 | 951 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 952 | status = nfserr_clid_inuse; |
21ab45a4 | 953 | else |
1da177e4 | 954 | status = nfs_ok; |
7c79f737 | 955 | } else if (!conf && unconf |
599e0a22 | 956 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
957 | /* |
958 | * RFC 3530 14.2.34 CASE 3: | |
959 | * Normal case; new or rebooted client: | |
7c79f737 | 960 | */ |
599e0a22 | 961 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
962 | status = nfserr_clid_inuse; |
963 | } else { | |
1a69c179 N |
964 | unsigned int hash = |
965 | clientstr_hashval(unconf->cl_recdir); | |
966 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
967 | hash); | |
968 | if (conf) { | |
c7b9a459 | 969 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
970 | expire_client(conf); |
971 | } | |
1da177e4 | 972 | move_to_confirmed(unconf); |
21ab45a4 | 973 | conf = unconf; |
46f8a64b | 974 | nfsd4_probe_callback(conf); |
1a69c179 | 975 | status = nfs_ok; |
1da177e4 | 976 | } |
599e0a22 BF |
977 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
978 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 979 | &confirm)))) { |
a186e767 BF |
980 | /* |
981 | * RFC 3530 14.2.34 CASE 4: | |
982 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 983 | */ |
1da177e4 | 984 | status = nfserr_stale_clientid; |
7c79f737 | 985 | } else { |
08e8987c N |
986 | /* check that we have hit one of the cases...*/ |
987 | status = nfserr_clid_inuse; | |
988 | } | |
1da177e4 | 989 | out: |
1da177e4 LT |
990 | nfs4_unlock_state(); |
991 | return status; | |
992 | } | |
993 | ||
1da177e4 LT |
994 | /* OPEN Share state helper functions */ |
995 | static inline struct nfs4_file * | |
996 | alloc_init_file(struct inode *ino) | |
997 | { | |
998 | struct nfs4_file *fp; | |
999 | unsigned int hashval = file_hashval(ino); | |
1000 | ||
e60d4398 N |
1001 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1002 | if (fp) { | |
13cd2184 | 1003 | kref_init(&fp->fi_ref); |
1da177e4 | 1004 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1005 | INIT_LIST_HEAD(&fp->fi_stateids); |
1006 | INIT_LIST_HEAD(&fp->fi_delegations); | |
1da177e4 LT |
1007 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
1008 | fp->fi_inode = igrab(ino); | |
1009 | fp->fi_id = current_fileid++; | |
47f9940c | 1010 | fp->fi_had_conflict = false; |
1da177e4 LT |
1011 | return fp; |
1012 | } | |
1013 | return NULL; | |
1014 | } | |
1015 | ||
e60d4398 | 1016 | static void |
e18b890b | 1017 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1018 | { |
e60d4398 N |
1019 | if (*slab == NULL) |
1020 | return; | |
1a1d92c1 | 1021 | kmem_cache_destroy(*slab); |
e60d4398 | 1022 | *slab = NULL; |
1da177e4 LT |
1023 | } |
1024 | ||
e8ff2a84 | 1025 | void |
1da177e4 LT |
1026 | nfsd4_free_slabs(void) |
1027 | { | |
e60d4398 N |
1028 | nfsd4_free_slab(&stateowner_slab); |
1029 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1030 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1031 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1032 | } |
1da177e4 | 1033 | |
e60d4398 N |
1034 | static int |
1035 | nfsd4_init_slabs(void) | |
1036 | { | |
1037 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1038 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1039 | if (stateowner_slab == NULL) |
1040 | goto out_nomem; | |
1041 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1042 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1043 | if (file_slab == NULL) |
1044 | goto out_nomem; | |
5ac049ac | 1045 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1046 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1047 | if (stateid_slab == NULL) |
1048 | goto out_nomem; | |
5b2d21c1 | 1049 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1050 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1051 | if (deleg_slab == NULL) |
1052 | goto out_nomem; | |
e60d4398 N |
1053 | return 0; |
1054 | out_nomem: | |
1055 | nfsd4_free_slabs(); | |
1056 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1057 | return -ENOMEM; | |
1da177e4 LT |
1058 | } |
1059 | ||
1060 | void | |
1061 | nfs4_free_stateowner(struct kref *kref) | |
1062 | { | |
1063 | struct nfs4_stateowner *sop = | |
1064 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1065 | kfree(sop->so_owner.data); | |
1066 | kmem_cache_free(stateowner_slab, sop); | |
1067 | } | |
1068 | ||
1069 | static inline struct nfs4_stateowner * | |
1070 | alloc_stateowner(struct xdr_netobj *owner) | |
1071 | { | |
1072 | struct nfs4_stateowner *sop; | |
1073 | ||
1074 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1075 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1076 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1077 | sop->so_owner.len = owner->len; | |
1078 | kref_init(&sop->so_ref); | |
1079 | return sop; | |
1080 | } | |
1081 | kmem_cache_free(stateowner_slab, sop); | |
1082 | } | |
1083 | return NULL; | |
1084 | } | |
1085 | ||
1086 | static struct nfs4_stateowner * | |
1087 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1088 | struct nfs4_stateowner *sop; | |
1089 | struct nfs4_replay *rp; | |
1090 | unsigned int idhashval; | |
1091 | ||
1092 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1093 | return NULL; | |
1094 | idhashval = ownerid_hashval(current_ownerid); | |
1095 | INIT_LIST_HEAD(&sop->so_idhash); | |
1096 | INIT_LIST_HEAD(&sop->so_strhash); | |
1097 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1098 | INIT_LIST_HEAD(&sop->so_stateids); |
1099 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1100 | INIT_LIST_HEAD(&sop->so_close_lru); |
1101 | sop->so_time = 0; | |
1102 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1103 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1104 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1105 | sop->so_is_open_owner = 1; |
1106 | sop->so_id = current_ownerid++; | |
1107 | sop->so_client = clp; | |
1108 | sop->so_seqid = open->op_seqid; | |
1109 | sop->so_confirmed = 0; | |
1110 | rp = &sop->so_replay; | |
de1ae286 | 1111 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1112 | rp->rp_buflen = 0; |
1113 | rp->rp_buf = rp->rp_ibuf; | |
1114 | return sop; | |
1115 | } | |
1116 | ||
1da177e4 LT |
1117 | static inline void |
1118 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1119 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1120 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1121 | ||
1122 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1123 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1124 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1125 | INIT_LIST_HEAD(&stp->st_perfile); |
1126 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1127 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1128 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1129 | stp->st_stateowner = sop; |
13cd2184 | 1130 | get_nfs4_file(fp); |
1da177e4 LT |
1131 | stp->st_file = fp; |
1132 | stp->st_stateid.si_boot = boot_time; | |
1133 | stp->st_stateid.si_stateownerid = sop->so_id; | |
1134 | stp->st_stateid.si_fileid = fp->fi_id; | |
1135 | stp->st_stateid.si_generation = 0; | |
1136 | stp->st_access_bmap = 0; | |
1137 | stp->st_deny_bmap = 0; | |
1138 | __set_bit(open->op_share_access, &stp->st_access_bmap); | |
1139 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
4c4cd222 | 1140 | stp->st_openstp = NULL; |
1da177e4 LT |
1141 | } |
1142 | ||
fd39ca9a | 1143 | static void |
1da177e4 LT |
1144 | move_to_close_lru(struct nfs4_stateowner *sop) |
1145 | { | |
1146 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1147 | ||
358dd55a | 1148 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1149 | sop->so_time = get_seconds(); |
1150 | } | |
1151 | ||
1da177e4 | 1152 | static int |
599e0a22 BF |
1153 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1154 | clientid_t *clid) | |
1155 | { | |
1156 | return (sop->so_owner.len == owner->len) && | |
1157 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1158 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1159 | } |
1160 | ||
1161 | static struct nfs4_stateowner * | |
1162 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1163 | { | |
1164 | struct nfs4_stateowner *so = NULL; | |
1165 | ||
1166 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1167 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1168 | return so; |
1169 | } | |
1170 | return NULL; | |
1171 | } | |
1172 | ||
1173 | /* search file_hashtbl[] for file */ | |
1174 | static struct nfs4_file * | |
1175 | find_file(struct inode *ino) | |
1176 | { | |
1177 | unsigned int hashval = file_hashval(ino); | |
1178 | struct nfs4_file *fp; | |
1179 | ||
1180 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { | |
13cd2184 N |
1181 | if (fp->fi_inode == ino) { |
1182 | get_nfs4_file(fp); | |
1da177e4 | 1183 | return fp; |
13cd2184 | 1184 | } |
1da177e4 LT |
1185 | } |
1186 | return NULL; | |
1187 | } | |
1188 | ||
8838dc43 | 1189 | static inline int access_valid(u32 x) |
ba5a6a19 | 1190 | { |
8838dc43 BF |
1191 | if (x < NFS4_SHARE_ACCESS_READ) |
1192 | return 0; | |
1193 | if (x > NFS4_SHARE_ACCESS_BOTH) | |
1194 | return 0; | |
1195 | return 1; | |
ba5a6a19 BF |
1196 | } |
1197 | ||
8838dc43 | 1198 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1199 | { |
8838dc43 BF |
1200 | /* Note: unlike access bits, deny bits may be zero. */ |
1201 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1202 | } |
1da177e4 | 1203 | |
4f83aa30 BF |
1204 | /* |
1205 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1206 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1207 | * only what share bits are currently in force, but also what | |
1208 | * combinations of share bits previous opens have used. This allows us | |
1209 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1210 | * return an error if the client attempt to downgrade to a combination | |
1211 | * of share bits not explicable by closing some of its previous opens. | |
1212 | * | |
1213 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1214 | * track of access/deny bit combinations; so, e.g., we allow: | |
1215 | * | |
1216 | * OPEN allow read, deny write | |
1217 | * OPEN allow both, deny none | |
1218 | * DOWNGRADE allow read, deny none | |
1219 | * | |
1220 | * which we should reject. | |
1221 | */ | |
fd39ca9a | 1222 | static void |
1da177e4 LT |
1223 | set_access(unsigned int *access, unsigned long bmap) { |
1224 | int i; | |
1225 | ||
1226 | *access = 0; | |
1227 | for (i = 1; i < 4; i++) { | |
1228 | if (test_bit(i, &bmap)) | |
1229 | *access |= i; | |
1230 | } | |
1231 | } | |
1232 | ||
fd39ca9a | 1233 | static void |
1da177e4 LT |
1234 | set_deny(unsigned int *deny, unsigned long bmap) { |
1235 | int i; | |
1236 | ||
1237 | *deny = 0; | |
1238 | for (i = 0; i < 4; i++) { | |
1239 | if (test_bit(i, &bmap)) | |
1240 | *deny |= i ; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | static int | |
1245 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1246 | unsigned int access, deny; | |
1247 | ||
1248 | set_access(&access, stp->st_access_bmap); | |
1249 | set_deny(&deny, stp->st_deny_bmap); | |
1250 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1251 | return 0; | |
1252 | return 1; | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Called to check deny when READ with all zero stateid or | |
1257 | * WRITE with all zero or all one stateid | |
1258 | */ | |
b37ad28b | 1259 | static __be32 |
1da177e4 LT |
1260 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1261 | { | |
1262 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1263 | struct nfs4_file *fp; | |
1264 | struct nfs4_stateid *stp; | |
b37ad28b | 1265 | __be32 ret; |
1da177e4 LT |
1266 | |
1267 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1268 | ||
1269 | fp = find_file(ino); | |
13cd2184 N |
1270 | if (!fp) |
1271 | return nfs_ok; | |
b700949b | 1272 | ret = nfserr_locked; |
1da177e4 | 1273 | /* Search for conflicting share reservations */ |
13cd2184 N |
1274 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1275 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1276 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1277 | goto out; | |
1da177e4 | 1278 | } |
13cd2184 N |
1279 | ret = nfs_ok; |
1280 | out: | |
1281 | put_nfs4_file(fp); | |
1282 | return ret; | |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | static inline void | |
1286 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1287 | { | |
1288 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1289 | drop_file_write_access(filp); |
1da177e4 LT |
1290 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
1291 | } | |
1292 | } | |
1293 | ||
1294 | /* | |
1295 | * Recall a delegation | |
1296 | */ | |
1297 | static int | |
1298 | do_recall(void *__dp) | |
1299 | { | |
1300 | struct nfs4_delegation *dp = __dp; | |
1301 | ||
47f9940c | 1302 | dp->dl_file->fi_had_conflict = true; |
1da177e4 LT |
1303 | nfsd4_cb_recall(dp); |
1304 | return 0; | |
1305 | } | |
1306 | ||
1307 | /* | |
1308 | * Spawn a thread to perform a recall on the delegation represented | |
1309 | * by the lease (file_lock) | |
1310 | * | |
1311 | * Called from break_lease() with lock_kernel() held. | |
1312 | * Note: we assume break_lease will only call this *once* for any given | |
1313 | * lease. | |
1314 | */ | |
1315 | static | |
1316 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1317 | { | |
1318 | struct nfs4_delegation *dp= (struct nfs4_delegation *)fl->fl_owner; | |
1319 | struct task_struct *t; | |
1320 | ||
1321 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1322 | if (!dp) | |
1323 | return; | |
1324 | ||
1325 | /* We're assuming the state code never drops its reference | |
1326 | * without first removing the lease. Since we're in this lease | |
1327 | * callback (and since the lease code is serialized by the kernel | |
1328 | * lock) we know the server hasn't removed the lease yet, we know | |
1329 | * it's safe to take a reference: */ | |
1330 | atomic_inc(&dp->dl_count); | |
cfdcad4d | 1331 | atomic_inc(&dp->dl_client->cl_count); |
1da177e4 LT |
1332 | |
1333 | spin_lock(&recall_lock); | |
1334 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
1335 | spin_unlock(&recall_lock); | |
1336 | ||
1337 | /* only place dl_time is set. protected by lock_kernel*/ | |
1338 | dp->dl_time = get_seconds(); | |
1339 | ||
0272e1fd BF |
1340 | /* |
1341 | * We don't want the locks code to timeout the lease for us; | |
1342 | * we'll remove it ourself if the delegation isn't returned | |
1343 | * in time. | |
1344 | */ | |
1345 | fl->fl_break_time = 0; | |
1da177e4 LT |
1346 | |
1347 | t = kthread_run(do_recall, dp, "%s", "nfs4_cb_recall"); | |
1348 | if (IS_ERR(t)) { | |
1349 | struct nfs4_client *clp = dp->dl_client; | |
1350 | ||
1351 | printk(KERN_INFO "NFSD: Callback thread failed for " | |
1352 | "for client (clientid %08x/%08x)\n", | |
1353 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
cfdcad4d | 1354 | put_nfs4_client(dp->dl_client); |
1da177e4 LT |
1355 | nfs4_put_delegation(dp); |
1356 | } | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * The file_lock is being reapd. | |
1361 | * | |
1362 | * Called by locks_free_lock() with lock_kernel() held. | |
1363 | */ | |
1364 | static | |
1365 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
1366 | { | |
1367 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
1368 | ||
1369 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
1370 | ||
1371 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
1372 | return; | |
1373 | dp->dl_flock = NULL; | |
1374 | } | |
1375 | ||
1376 | /* | |
1377 | * Set the delegation file_lock back pointer. | |
1378 | * | |
a9933cea | 1379 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
1380 | */ |
1381 | static | |
1382 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
1383 | { | |
1384 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
1385 | ||
1386 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
1387 | if (!dp) | |
1388 | return; | |
1389 | dp->dl_flock = new; | |
1390 | } | |
1391 | ||
1392 | /* | |
a9933cea | 1393 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
1394 | */ |
1395 | static | |
1396 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
1397 | { | |
1398 | struct nfs4_delegation *onlistd = | |
1399 | (struct nfs4_delegation *)onlist->fl_owner; | |
1400 | struct nfs4_delegation *tryd = | |
1401 | (struct nfs4_delegation *)try->fl_owner; | |
1402 | ||
1403 | if (onlist->fl_lmops != try->fl_lmops) | |
1404 | return 0; | |
1405 | ||
1406 | return onlistd->dl_client == tryd->dl_client; | |
1407 | } | |
1408 | ||
1409 | ||
1410 | static | |
1411 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
1412 | { | |
1413 | if (arg & F_UNLCK) | |
1414 | return lease_modify(onlist, arg); | |
1415 | else | |
1416 | return -EAGAIN; | |
1417 | } | |
1418 | ||
fd39ca9a | 1419 | static struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
1420 | .fl_break = nfsd_break_deleg_cb, |
1421 | .fl_release_private = nfsd_release_deleg_cb, | |
1422 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
1423 | .fl_mylease = nfsd_same_client_deleg_cb, | |
1424 | .fl_change = nfsd_change_deleg_cb, | |
1425 | }; | |
1426 | ||
1427 | ||
b37ad28b | 1428 | __be32 |
1da177e4 LT |
1429 | nfsd4_process_open1(struct nfsd4_open *open) |
1430 | { | |
1da177e4 LT |
1431 | clientid_t *clientid = &open->op_clientid; |
1432 | struct nfs4_client *clp = NULL; | |
1433 | unsigned int strhashval; | |
1434 | struct nfs4_stateowner *sop = NULL; | |
1435 | ||
1da177e4 | 1436 | if (!check_name(open->op_owner)) |
0f442aa2 | 1437 | return nfserr_inval; |
1da177e4 LT |
1438 | |
1439 | if (STALE_CLIENTID(&open->op_clientid)) | |
1440 | return nfserr_stale_clientid; | |
1441 | ||
1442 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
1443 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
1444 | open->op_stateowner = sop; |
1445 | if (!sop) { | |
1446 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
1447 | clp = find_confirmed_client(clientid); |
1448 | if (clp == NULL) | |
0f442aa2 BF |
1449 | return nfserr_expired; |
1450 | goto renew; | |
1da177e4 | 1451 | } |
0f442aa2 BF |
1452 | if (!sop->so_confirmed) { |
1453 | /* Replace unconfirmed owners without checking for replay. */ | |
1454 | clp = sop->so_client; | |
f044ff83 | 1455 | release_openowner(sop); |
0f442aa2 BF |
1456 | open->op_stateowner = NULL; |
1457 | goto renew; | |
1458 | } | |
1459 | if (open->op_seqid == sop->so_seqid - 1) { | |
1460 | if (sop->so_replay.rp_buflen) | |
a90b061c | 1461 | return nfserr_replay_me; |
0f442aa2 BF |
1462 | /* The original OPEN failed so spectacularly |
1463 | * that we don't even have replay data saved! | |
1464 | * Therefore, we have no choice but to continue | |
1465 | * processing this OPEN; presumably, we'll | |
1466 | * fail again for the same reason. | |
1467 | */ | |
1468 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
1469 | goto renew; | |
1470 | } | |
1471 | if (open->op_seqid != sop->so_seqid) | |
1472 | return nfserr_bad_seqid; | |
1da177e4 | 1473 | renew: |
0f442aa2 BF |
1474 | if (open->op_stateowner == NULL) { |
1475 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
1476 | if (sop == NULL) | |
1477 | return nfserr_resource; | |
1478 | open->op_stateowner = sop; | |
1479 | } | |
1480 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 1481 | renew_client(sop->so_client); |
0f442aa2 | 1482 | return nfs_ok; |
1da177e4 LT |
1483 | } |
1484 | ||
b37ad28b | 1485 | static inline __be32 |
4a6e43e6 N |
1486 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
1487 | { | |
1488 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
1489 | return nfserr_openmode; | |
1490 | else | |
1491 | return nfs_ok; | |
1492 | } | |
1493 | ||
52f4fb43 N |
1494 | static struct nfs4_delegation * |
1495 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
1496 | { | |
1497 | struct nfs4_delegation *dp; | |
1498 | ||
ea1da636 | 1499 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
1500 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
1501 | return dp; | |
1502 | } | |
1503 | return NULL; | |
1504 | } | |
1505 | ||
b37ad28b | 1506 | static __be32 |
567d9829 N |
1507 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
1508 | struct nfs4_delegation **dp) | |
1509 | { | |
1510 | int flags; | |
b37ad28b | 1511 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
1512 | |
1513 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
1514 | if (*dp == NULL) | |
c44c5eeb | 1515 | goto out; |
567d9829 N |
1516 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
1517 | RD_STATE : WR_STATE; | |
1518 | status = nfs4_check_delegmode(*dp, flags); | |
1519 | if (status) | |
1520 | *dp = NULL; | |
c44c5eeb N |
1521 | out: |
1522 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1523 | return nfs_ok; | |
1524 | if (status) | |
1525 | return status; | |
1526 | open->op_stateowner->so_confirmed = 1; | |
1527 | return nfs_ok; | |
567d9829 N |
1528 | } |
1529 | ||
b37ad28b | 1530 | static __be32 |
1da177e4 LT |
1531 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
1532 | { | |
1533 | struct nfs4_stateid *local; | |
b37ad28b | 1534 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
1535 | struct nfs4_stateowner *sop = open->op_stateowner; |
1536 | ||
8beefa24 | 1537 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
1538 | /* ignore lock owners */ |
1539 | if (local->st_stateowner->so_is_open_owner == 0) | |
1540 | continue; | |
1541 | /* remember if we have seen this open owner */ | |
1542 | if (local->st_stateowner == sop) | |
1543 | *stpp = local; | |
1544 | /* check for conflicting share reservations */ | |
1545 | if (!test_share(local, open)) | |
1546 | goto out; | |
1547 | } | |
1548 | status = 0; | |
1549 | out: | |
1550 | return status; | |
1551 | } | |
1552 | ||
5ac049ac N |
1553 | static inline struct nfs4_stateid * |
1554 | nfs4_alloc_stateid(void) | |
1555 | { | |
1556 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
1557 | } | |
1558 | ||
b37ad28b | 1559 | static __be32 |
1da177e4 | 1560 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 1561 | struct nfs4_delegation *dp, |
1da177e4 LT |
1562 | struct svc_fh *cur_fh, int flags) |
1563 | { | |
1564 | struct nfs4_stateid *stp; | |
1da177e4 | 1565 | |
5ac049ac | 1566 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
1567 | if (stp == NULL) |
1568 | return nfserr_resource; | |
1569 | ||
567d9829 N |
1570 | if (dp) { |
1571 | get_file(dp->dl_vfs_file); | |
1572 | stp->st_vfs_file = dp->dl_vfs_file; | |
1573 | } else { | |
b37ad28b | 1574 | __be32 status; |
567d9829 N |
1575 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
1576 | &stp->st_vfs_file); | |
1577 | if (status) { | |
1578 | if (status == nfserr_dropit) | |
1579 | status = nfserr_jukebox; | |
5ac049ac | 1580 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
1581 | return status; |
1582 | } | |
1da177e4 | 1583 | } |
1da177e4 LT |
1584 | *stpp = stp; |
1585 | return 0; | |
1586 | } | |
1587 | ||
b37ad28b | 1588 | static inline __be32 |
1da177e4 LT |
1589 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
1590 | struct nfsd4_open *open) | |
1591 | { | |
1592 | struct iattr iattr = { | |
1593 | .ia_valid = ATTR_SIZE, | |
1594 | .ia_size = 0, | |
1595 | }; | |
1596 | if (!open->op_truncate) | |
1597 | return 0; | |
1598 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 1599 | return nfserr_inval; |
1da177e4 LT |
1600 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
1601 | } | |
1602 | ||
b37ad28b | 1603 | static __be32 |
1da177e4 LT |
1604 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
1605 | { | |
1606 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 1607 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 1608 | unsigned int share_access, new_writer; |
b37ad28b | 1609 | __be32 status; |
1da177e4 LT |
1610 | |
1611 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
1612 | new_writer = (~share_access) & open->op_share_access |
1613 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 1614 | |
6c26d08f | 1615 | if (new_writer) { |
b37ad28b AV |
1616 | int err = get_write_access(inode); |
1617 | if (err) | |
1618 | return nfserrno(err); | |
e518f056 BH |
1619 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
1620 | if (err) | |
1621 | return nfserrno(err); | |
1622 | file_take_write(filp); | |
6c26d08f | 1623 | } |
1da177e4 LT |
1624 | status = nfsd4_truncate(rqstp, cur_fh, open); |
1625 | if (status) { | |
6c26d08f BF |
1626 | if (new_writer) |
1627 | put_write_access(inode); | |
1da177e4 LT |
1628 | return status; |
1629 | } | |
1630 | /* remember the open */ | |
6c26d08f | 1631 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
1632 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
1633 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
1634 | |
1635 | return nfs_ok; | |
1636 | } | |
1637 | ||
1638 | ||
1da177e4 | 1639 | static void |
37515177 | 1640 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 1641 | { |
37515177 N |
1642 | open->op_stateowner->so_confirmed = 1; |
1643 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
1644 | } |
1645 | ||
1646 | /* | |
1647 | * Attempt to hand out a delegation. | |
1648 | */ | |
1649 | static void | |
1650 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
1651 | { | |
1652 | struct nfs4_delegation *dp; | |
1653 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
1654 | struct nfs4_callback *cb = &sop->so_client->cl_callback; | |
1655 | struct file_lock fl, *flp = &fl; | |
1656 | int status, flag = 0; | |
1657 | ||
1658 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
1659 | open->op_recall = 0; |
1660 | switch (open->op_claim_type) { | |
1661 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
1662 | if (!atomic_read(&cb->cb_set)) | |
1663 | open->op_recall = 1; | |
1664 | flag = open->op_delegate_type; | |
1665 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
1666 | goto out; | |
1667 | break; | |
1668 | case NFS4_OPEN_CLAIM_NULL: | |
1669 | /* Let's not give out any delegations till everyone's | |
1670 | * had the chance to reclaim theirs.... */ | |
af558e33 | 1671 | if (locks_in_grace()) |
7b190fec N |
1672 | goto out; |
1673 | if (!atomic_read(&cb->cb_set) || !sop->so_confirmed) | |
1674 | goto out; | |
1675 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
1676 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
1677 | else | |
1678 | flag = NFS4_OPEN_DELEGATE_READ; | |
1679 | break; | |
1680 | default: | |
1681 | goto out; | |
1682 | } | |
1da177e4 LT |
1683 | |
1684 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
1685 | if (dp == NULL) { | |
1686 | flag = NFS4_OPEN_DELEGATE_NONE; | |
1687 | goto out; | |
1688 | } | |
1689 | locks_init_lock(&fl); | |
1690 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
1691 | fl.fl_flags = FL_LEASE; | |
9167f501 | 1692 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
1693 | fl.fl_end = OFFSET_MAX; |
1694 | fl.fl_owner = (fl_owner_t)dp; | |
1695 | fl.fl_file = stp->st_vfs_file; | |
1696 | fl.fl_pid = current->tgid; | |
1697 | ||
a9933cea | 1698 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
1699 | * the lock_manager callbacks fl_mylease and fl_change are used |
1700 | */ | |
9167f501 | 1701 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 1702 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 1703 | unhash_delegation(dp); |
1da177e4 LT |
1704 | flag = NFS4_OPEN_DELEGATE_NONE; |
1705 | goto out; | |
1706 | } | |
1707 | ||
1708 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
1709 | ||
1710 | dprintk("NFSD: delegation stateid=(%08x/%08x/%08x/%08x)\n\n", | |
1711 | dp->dl_stateid.si_boot, | |
1712 | dp->dl_stateid.si_stateownerid, | |
1713 | dp->dl_stateid.si_fileid, | |
1714 | dp->dl_stateid.si_generation); | |
1715 | out: | |
7b190fec N |
1716 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
1717 | && flag == NFS4_OPEN_DELEGATE_NONE | |
1718 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 1719 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
1720 | open->op_delegate_type = flag; |
1721 | } | |
1722 | ||
1723 | /* | |
1724 | * called with nfs4_lock_state() held. | |
1725 | */ | |
b37ad28b | 1726 | __be32 |
1da177e4 LT |
1727 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
1728 | { | |
1729 | struct nfs4_file *fp = NULL; | |
1730 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1731 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 1732 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 1733 | __be32 status; |
1da177e4 LT |
1734 | |
1735 | status = nfserr_inval; | |
ba5a6a19 BF |
1736 | if (!access_valid(open->op_share_access) |
1737 | || !deny_valid(open->op_share_deny)) | |
1da177e4 LT |
1738 | goto out; |
1739 | /* | |
1740 | * Lookup file; if found, lookup stateid and check open request, | |
1741 | * and check for delegations in the process of being recalled. | |
1742 | * If not found, create the nfs4_file struct | |
1743 | */ | |
1744 | fp = find_file(ino); | |
1745 | if (fp) { | |
1746 | if ((status = nfs4_check_open(fp, open, &stp))) | |
1747 | goto out; | |
c44c5eeb N |
1748 | status = nfs4_check_deleg(fp, open, &dp); |
1749 | if (status) | |
1750 | goto out; | |
1da177e4 | 1751 | } else { |
c44c5eeb N |
1752 | status = nfserr_bad_stateid; |
1753 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
1754 | goto out; | |
1da177e4 LT |
1755 | status = nfserr_resource; |
1756 | fp = alloc_init_file(ino); | |
1757 | if (fp == NULL) | |
1758 | goto out; | |
1759 | } | |
1760 | ||
1761 | /* | |
1762 | * OPEN the file, or upgrade an existing OPEN. | |
1763 | * If truncate fails, the OPEN fails. | |
1764 | */ | |
1765 | if (stp) { | |
1766 | /* Stateid was found, this is an OPEN upgrade */ | |
1767 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
1768 | if (status) | |
1769 | goto out; | |
444c2c07 | 1770 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
1771 | } else { |
1772 | /* Stateid was not found, this is a new OPEN */ | |
1773 | int flags = 0; | |
9ecb6a08 | 1774 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 1775 | flags |= NFSD_MAY_READ; |
1da177e4 | 1776 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 1777 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
1778 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
1779 | if (status) | |
1da177e4 LT |
1780 | goto out; |
1781 | init_stateid(stp, fp, open); | |
1782 | status = nfsd4_truncate(rqstp, current_fh, open); | |
1783 | if (status) { | |
2283963f | 1784 | release_open_stateid(stp); |
1da177e4 LT |
1785 | goto out; |
1786 | } | |
1787 | } | |
1788 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
1789 | ||
1790 | /* | |
1791 | * Attempt to hand out a delegation. No error return, because the | |
1792 | * OPEN succeeds even if we fail. | |
1793 | */ | |
1794 | nfs4_open_delegation(current_fh, open, stp); | |
1795 | ||
1796 | status = nfs_ok; | |
1797 | ||
1798 | dprintk("nfs4_process_open2: stateid=(%08x/%08x/%08x/%08x)\n", | |
1799 | stp->st_stateid.si_boot, stp->st_stateid.si_stateownerid, | |
1800 | stp->st_stateid.si_fileid, stp->st_stateid.si_generation); | |
1801 | out: | |
13cd2184 N |
1802 | if (fp) |
1803 | put_nfs4_file(fp); | |
37515177 N |
1804 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
1805 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
1806 | /* |
1807 | * To finish the open response, we just need to set the rflags. | |
1808 | */ | |
1809 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
1810 | if (!open->op_stateowner->so_confirmed) | |
1811 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; | |
1812 | ||
1813 | return status; | |
1814 | } | |
1815 | ||
b37ad28b | 1816 | __be32 |
b591480b BF |
1817 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1818 | clientid_t *clid) | |
1da177e4 LT |
1819 | { |
1820 | struct nfs4_client *clp; | |
b37ad28b | 1821 | __be32 status; |
1da177e4 LT |
1822 | |
1823 | nfs4_lock_state(); | |
1824 | dprintk("process_renew(%08x/%08x): starting\n", | |
1825 | clid->cl_boot, clid->cl_id); | |
1826 | status = nfserr_stale_clientid; | |
1827 | if (STALE_CLIENTID(clid)) | |
1828 | goto out; | |
1829 | clp = find_confirmed_client(clid); | |
1830 | status = nfserr_expired; | |
1831 | if (clp == NULL) { | |
1832 | /* We assume the client took too long to RENEW. */ | |
1833 | dprintk("nfsd4_renew: clientid not found!\n"); | |
1834 | goto out; | |
1835 | } | |
1836 | renew_client(clp); | |
1837 | status = nfserr_cb_path_down; | |
ea1da636 | 1838 | if (!list_empty(&clp->cl_delegations) |
1da177e4 LT |
1839 | && !atomic_read(&clp->cl_callback.cb_set)) |
1840 | goto out; | |
1841 | status = nfs_ok; | |
1842 | out: | |
1843 | nfs4_unlock_state(); | |
1844 | return status; | |
1845 | } | |
1846 | ||
af558e33 BF |
1847 | struct lock_manager nfsd4_manager = { |
1848 | }; | |
1849 | ||
a76b4319 | 1850 | static void |
af558e33 | 1851 | nfsd4_end_grace(void) |
a76b4319 N |
1852 | { |
1853 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 1854 | nfsd4_recdir_purge_old(); |
af558e33 | 1855 | locks_end_grace(&nfsd4_manager); |
a76b4319 N |
1856 | } |
1857 | ||
fd39ca9a | 1858 | static time_t |
1da177e4 LT |
1859 | nfs4_laundromat(void) |
1860 | { | |
1861 | struct nfs4_client *clp; | |
1862 | struct nfs4_stateowner *sop; | |
1863 | struct nfs4_delegation *dp; | |
1864 | struct list_head *pos, *next, reaplist; | |
1865 | time_t cutoff = get_seconds() - NFSD_LEASE_TIME; | |
1866 | time_t t, clientid_val = NFSD_LEASE_TIME; | |
1867 | time_t u, test_val = NFSD_LEASE_TIME; | |
1868 | ||
1869 | nfs4_lock_state(); | |
1870 | ||
1871 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
1872 | if (locks_in_grace()) |
1873 | nfsd4_end_grace(); | |
1da177e4 LT |
1874 | list_for_each_safe(pos, next, &client_lru) { |
1875 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
1876 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
1877 | t = clp->cl_time - cutoff; | |
1878 | if (clientid_val > t) | |
1879 | clientid_val = t; | |
1880 | break; | |
1881 | } | |
1882 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
1883 | clp->cl_clientid.cl_id); | |
c7b9a459 | 1884 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
1885 | expire_client(clp); |
1886 | } | |
1887 | INIT_LIST_HEAD(&reaplist); | |
1888 | spin_lock(&recall_lock); | |
1889 | list_for_each_safe(pos, next, &del_recall_lru) { | |
1890 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1891 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
1892 | u = dp->dl_time - cutoff; | |
1893 | if (test_val > u) | |
1894 | test_val = u; | |
1895 | break; | |
1896 | } | |
1897 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
1898 | dp, dp->dl_flock); | |
1899 | list_move(&dp->dl_recall_lru, &reaplist); | |
1900 | } | |
1901 | spin_unlock(&recall_lock); | |
1902 | list_for_each_safe(pos, next, &reaplist) { | |
1903 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
1904 | list_del_init(&dp->dl_recall_lru); | |
1905 | unhash_delegation(dp); | |
1906 | } | |
1907 | test_val = NFSD_LEASE_TIME; | |
1908 | list_for_each_safe(pos, next, &close_lru) { | |
1909 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
1910 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
1911 | u = sop->so_time - cutoff; | |
1912 | if (test_val > u) | |
1913 | test_val = u; | |
1914 | break; | |
1915 | } | |
1916 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
1917 | sop->so_id); | |
f044ff83 | 1918 | release_openowner(sop); |
1da177e4 LT |
1919 | } |
1920 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
1921 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
1922 | nfs4_unlock_state(); | |
1923 | return clientid_val; | |
1924 | } | |
1925 | ||
a254b246 HH |
1926 | static struct workqueue_struct *laundry_wq; |
1927 | static void laundromat_main(struct work_struct *); | |
1928 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
1929 | ||
1930 | static void | |
c4028958 | 1931 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
1932 | { |
1933 | time_t t; | |
1934 | ||
1935 | t = nfs4_laundromat(); | |
1936 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 1937 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
1938 | } |
1939 | ||
fd39ca9a | 1940 | static struct nfs4_stateowner * |
f8816512 N |
1941 | search_close_lru(u32 st_id, int flags) |
1942 | { | |
1da177e4 LT |
1943 | struct nfs4_stateowner *local = NULL; |
1944 | ||
1da177e4 LT |
1945 | if (flags & CLOSE_STATE) { |
1946 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
1947 | if (local->so_id == st_id) | |
1948 | return local; | |
1949 | } | |
1950 | } | |
1951 | return NULL; | |
1952 | } | |
1953 | ||
1954 | static inline int | |
1955 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
1956 | { | |
7eaa36e2 | 1957 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
1958 | } |
1959 | ||
1960 | static int | |
1961 | STALE_STATEID(stateid_t *stateid) | |
1962 | { | |
1963 | if (stateid->si_boot == boot_time) | |
1964 | return 0; | |
849823c5 | 1965 | dprintk("NFSD: stale stateid (%08x/%08x/%08x/%08x)!\n", |
1da177e4 LT |
1966 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, |
1967 | stateid->si_generation); | |
1968 | return 1; | |
1969 | } | |
1970 | ||
1971 | static inline int | |
1972 | access_permit_read(unsigned long access_bmap) | |
1973 | { | |
1974 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
1975 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
1976 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
1977 | } | |
1978 | ||
1979 | static inline int | |
1980 | access_permit_write(unsigned long access_bmap) | |
1981 | { | |
1982 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
1983 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
1984 | } | |
1985 | ||
1986 | static | |
b37ad28b | 1987 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 1988 | { |
b37ad28b | 1989 | __be32 status = nfserr_openmode; |
1da177e4 LT |
1990 | |
1991 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
1992 | goto out; | |
1993 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
1994 | goto out; | |
1995 | status = nfs_ok; | |
1996 | out: | |
1997 | return status; | |
1998 | } | |
1999 | ||
b37ad28b | 2000 | static inline __be32 |
1da177e4 LT |
2001 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2002 | { | |
2003 | /* Trying to call delegreturn with a special stateid? Yuch: */ | |
2004 | if (!(flags & (RD_STATE | WR_STATE))) | |
2005 | return nfserr_bad_stateid; | |
2006 | else if (ONE_STATEID(stateid) && (flags & RD_STATE)) | |
2007 | return nfs_ok; | |
af558e33 | 2008 | else if (locks_in_grace()) { |
1da177e4 LT |
2009 | /* Answer in remaining cases depends on existance of |
2010 | * conflicting state; so we must wait out the grace period. */ | |
2011 | return nfserr_grace; | |
2012 | } else if (flags & WR_STATE) | |
2013 | return nfs4_share_conflict(current_fh, | |
2014 | NFS4_SHARE_DENY_WRITE); | |
2015 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2016 | return nfs4_share_conflict(current_fh, | |
2017 | NFS4_SHARE_DENY_READ); | |
2018 | } | |
2019 | ||
2020 | /* | |
2021 | * Allow READ/WRITE during grace period on recovered state only for files | |
2022 | * that are not able to provide mandatory locking. | |
2023 | */ | |
2024 | static inline int | |
2025 | io_during_grace_disallowed(struct inode *inode, int flags) | |
2026 | { | |
af558e33 | 2027 | return locks_in_grace() && (flags & (RD_STATE | WR_STATE)) |
a16877ca | 2028 | && mandatory_lock(inode); |
1da177e4 LT |
2029 | } |
2030 | ||
0836f587 BF |
2031 | static int check_stateid_generation(stateid_t *in, stateid_t *ref) |
2032 | { | |
2033 | /* If the client sends us a stateid from the future, it's buggy: */ | |
2034 | if (in->si_generation > ref->si_generation) | |
2035 | return nfserr_bad_stateid; | |
2036 | /* | |
2037 | * The following, however, can happen. For example, if the | |
2038 | * client sends an open and some IO at the same time, the open | |
2039 | * may bump si_generation while the IO is still in flight. | |
2040 | * Thanks to hard links and renames, the client never knows what | |
2041 | * file an open will affect. So it could avoid that situation | |
2042 | * only by serializing all opens and IO from the same open | |
2043 | * owner. To recover from the old_stateid error, the client | |
2044 | * will just have to retry the IO: | |
2045 | */ | |
2046 | if (in->si_generation < ref->si_generation) | |
2047 | return nfserr_old_stateid; | |
2048 | return nfs_ok; | |
2049 | } | |
2050 | ||
1da177e4 LT |
2051 | /* |
2052 | * Checks for stateid operations | |
2053 | */ | |
b37ad28b | 2054 | __be32 |
1da177e4 LT |
2055 | nfs4_preprocess_stateid_op(struct svc_fh *current_fh, stateid_t *stateid, int flags, struct file **filpp) |
2056 | { | |
2057 | struct nfs4_stateid *stp = NULL; | |
2058 | struct nfs4_delegation *dp = NULL; | |
2059 | stateid_t *stidp; | |
2060 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
b37ad28b | 2061 | __be32 status; |
1da177e4 LT |
2062 | |
2063 | dprintk("NFSD: preprocess_stateid_op: stateid = (%08x/%08x/%08x/%08x)\n", | |
2064 | stateid->si_boot, stateid->si_stateownerid, | |
2065 | stateid->si_fileid, stateid->si_generation); | |
2066 | if (filpp) | |
2067 | *filpp = NULL; | |
2068 | ||
2069 | if (io_during_grace_disallowed(ino, flags)) | |
2070 | return nfserr_grace; | |
2071 | ||
2072 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
2073 | return check_special_stateids(current_fh, stateid, flags); | |
2074 | ||
1da177e4 LT |
2075 | status = nfserr_stale_stateid; |
2076 | if (STALE_STATEID(stateid)) | |
2077 | goto out; | |
2078 | ||
1da177e4 LT |
2079 | status = nfserr_bad_stateid; |
2080 | if (!stateid->si_fileid) { /* delegation stateid */ | |
a4455be0 BF |
2081 | dp = find_delegation_stateid(ino, stateid); |
2082 | if (!dp) { | |
1da177e4 | 2083 | dprintk("NFSD: delegation stateid not found\n"); |
1da177e4 LT |
2084 | goto out; |
2085 | } | |
2086 | stidp = &dp->dl_stateid; | |
2087 | } else { /* open or lock stateid */ | |
a4455be0 BF |
2088 | stp = find_stateid(stateid, flags); |
2089 | if (!stp) { | |
1da177e4 | 2090 | dprintk("NFSD: open or lock stateid not found\n"); |
1da177e4 LT |
2091 | goto out; |
2092 | } | |
2093 | if ((flags & CHECK_FH) && nfs4_check_fh(current_fh, stp)) | |
2094 | goto out; | |
2095 | if (!stp->st_stateowner->so_confirmed) | |
2096 | goto out; | |
2097 | stidp = &stp->st_stateid; | |
2098 | } | |
0836f587 BF |
2099 | status = check_stateid_generation(stateid, stidp); |
2100 | if (status) | |
1da177e4 LT |
2101 | goto out; |
2102 | if (stp) { | |
a4455be0 BF |
2103 | status = nfs4_check_openmode(stp, flags); |
2104 | if (status) | |
1da177e4 LT |
2105 | goto out; |
2106 | renew_client(stp->st_stateowner->so_client); | |
2107 | if (filpp) | |
2108 | *filpp = stp->st_vfs_file; | |
6a85fa3a | 2109 | } else { |
a4455be0 BF |
2110 | status = nfs4_check_delegmode(dp, flags); |
2111 | if (status) | |
1da177e4 LT |
2112 | goto out; |
2113 | renew_client(dp->dl_client); | |
2114 | if (flags & DELEG_RET) | |
2115 | unhash_delegation(dp); | |
2116 | if (filpp) | |
2117 | *filpp = dp->dl_vfs_file; | |
2118 | } | |
2119 | status = nfs_ok; | |
2120 | out: | |
2121 | return status; | |
2122 | } | |
2123 | ||
4c4cd222 N |
2124 | static inline int |
2125 | setlkflg (int type) | |
2126 | { | |
2127 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2128 | RD_STATE : WR_STATE; | |
2129 | } | |
1da177e4 LT |
2130 | |
2131 | /* | |
2132 | * Checks for sequence id mutating operations. | |
2133 | */ | |
b37ad28b | 2134 | static __be32 |
4c4cd222 | 2135 | nfs4_preprocess_seqid_op(struct svc_fh *current_fh, u32 seqid, stateid_t *stateid, int flags, struct nfs4_stateowner **sopp, struct nfs4_stateid **stpp, struct nfsd4_lock *lock) |
1da177e4 | 2136 | { |
1da177e4 LT |
2137 | struct nfs4_stateid *stp; |
2138 | struct nfs4_stateowner *sop; | |
0836f587 | 2139 | __be32 status; |
1da177e4 LT |
2140 | |
2141 | dprintk("NFSD: preprocess_seqid_op: seqid=%d " | |
2142 | "stateid = (%08x/%08x/%08x/%08x)\n", seqid, | |
2143 | stateid->si_boot, stateid->si_stateownerid, stateid->si_fileid, | |
2144 | stateid->si_generation); | |
3a4f98bb | 2145 | |
1da177e4 LT |
2146 | *stpp = NULL; |
2147 | *sopp = NULL; | |
2148 | ||
1da177e4 | 2149 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2150 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2151 | return nfserr_bad_stateid; |
1da177e4 LT |
2152 | } |
2153 | ||
1da177e4 | 2154 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2155 | return nfserr_stale_stateid; |
1da177e4 LT |
2156 | /* |
2157 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2158 | * the confirmed flag is incorrecly set, or the generation | |
2159 | * number is incorrect. | |
1da177e4 | 2160 | */ |
f8816512 N |
2161 | stp = find_stateid(stateid, flags); |
2162 | if (stp == NULL) { | |
2163 | /* | |
2164 | * Also, we should make sure this isn't just the result of | |
2165 | * a replayed close: | |
2166 | */ | |
2167 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2168 | if (sop == NULL) | |
2169 | return nfserr_bad_stateid; | |
2170 | *sopp = sop; | |
2171 | goto check_replay; | |
2172 | } | |
1da177e4 | 2173 | |
39325bd0 BF |
2174 | *stpp = stp; |
2175 | *sopp = sop = stp->st_stateowner; | |
2176 | ||
4c4cd222 | 2177 | if (lock) { |
4c4cd222 | 2178 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2179 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2180 | int lkflg = 0; |
b37ad28b | 2181 | __be32 status; |
4c4cd222 N |
2182 | |
2183 | lkflg = setlkflg(lock->lk_type); | |
2184 | ||
2185 | if (lock->lk_is_new) { | |
599e0a22 BF |
2186 | if (!sop->so_is_open_owner) |
2187 | return nfserr_bad_stateid; | |
2188 | if (!same_clid(&clp->cl_clientid, lockclid)) | |
4c4cd222 | 2189 | return nfserr_bad_stateid; |
599e0a22 BF |
2190 | /* stp is the open stateid */ |
2191 | status = nfs4_check_openmode(stp, lkflg); | |
2192 | if (status) | |
2193 | return status; | |
2194 | } else { | |
2195 | /* stp is the lock stateid */ | |
2196 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2197 | if (status) | |
2198 | return status; | |
4c4cd222 | 2199 | } |
1da177e4 LT |
2200 | } |
2201 | ||
f3362737 | 2202 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2203 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2204 | return nfserr_bad_stateid; |
1da177e4 LT |
2205 | } |
2206 | ||
1da177e4 LT |
2207 | /* |
2208 | * We now validate the seqid and stateid generation numbers. | |
2209 | * For the moment, we ignore the possibility of | |
2210 | * generation number wraparound. | |
2211 | */ | |
bd9aac52 | 2212 | if (seqid != sop->so_seqid) |
1da177e4 LT |
2213 | goto check_replay; |
2214 | ||
3a4f98bb | 2215 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2216 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2217 | " unconfirmed stateowner!\n"); |
2218 | return nfserr_bad_stateid; | |
1da177e4 | 2219 | } |
3a4f98bb | 2220 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2221 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2222 | " confirmed yet!\n"); |
2223 | return nfserr_bad_stateid; | |
1da177e4 | 2224 | } |
0836f587 BF |
2225 | status = check_stateid_generation(stateid, &stp->st_stateid); |
2226 | if (status) | |
2227 | return status; | |
52fd004e | 2228 | renew_client(sop->so_client); |
3a4f98bb | 2229 | return nfs_ok; |
1da177e4 | 2230 | |
1da177e4 | 2231 | check_replay: |
bd9aac52 | 2232 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2233 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2234 | /* indicate replay to calling function */ |
a90b061c | 2235 | return nfserr_replay_me; |
1da177e4 | 2236 | } |
2fdada03 | 2237 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2238 | sop->so_seqid, seqid); |
2239 | *sopp = NULL; | |
2240 | return nfserr_bad_seqid; | |
1da177e4 LT |
2241 | } |
2242 | ||
b37ad28b | 2243 | __be32 |
ca364317 | 2244 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2245 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2246 | { |
b37ad28b | 2247 | __be32 status; |
1da177e4 LT |
2248 | struct nfs4_stateowner *sop; |
2249 | struct nfs4_stateid *stp; | |
2250 | ||
2251 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2252 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2253 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2254 | |
ca364317 | 2255 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2256 | if (status) |
2257 | return status; | |
1da177e4 LT |
2258 | |
2259 | nfs4_lock_state(); | |
2260 | ||
ca364317 BF |
2261 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2262 | oc->oc_seqid, &oc->oc_req_stateid, | |
f3362737 | 2263 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2264 | &oc->oc_stateowner, &stp, NULL))) |
2265 | goto out; | |
2266 | ||
2267 | sop = oc->oc_stateowner; | |
2268 | sop->so_confirmed = 1; | |
2269 | update_stateid(&stp->st_stateid); | |
2270 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2271 | dprintk("NFSD: nfsd4_open_confirm: success, seqid=%d " | |
2272 | "stateid=(%08x/%08x/%08x/%08x)\n", oc->oc_seqid, | |
2273 | stp->st_stateid.si_boot, | |
2274 | stp->st_stateid.si_stateownerid, | |
2275 | stp->st_stateid.si_fileid, | |
2276 | stp->st_stateid.si_generation); | |
c7b9a459 N |
2277 | |
2278 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2279 | out: |
f2327d9a | 2280 | if (oc->oc_stateowner) { |
1da177e4 | 2281 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 2282 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 2283 | } |
1da177e4 LT |
2284 | nfs4_unlock_state(); |
2285 | return status; | |
2286 | } | |
2287 | ||
2288 | ||
2289 | /* | |
2290 | * unset all bits in union bitmap (bmap) that | |
2291 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
2292 | */ | |
2293 | static void | |
2294 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
2295 | { | |
2296 | int i; | |
2297 | for (i = 1; i < 4; i++) { | |
2298 | if ((i & access) != i) | |
2299 | __clear_bit(i, bmap); | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | static void | |
2304 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
2305 | { | |
2306 | int i; | |
2307 | for (i = 0; i < 4; i++) { | |
2308 | if ((i & deny) != i) | |
2309 | __clear_bit(i, bmap); | |
2310 | } | |
2311 | } | |
2312 | ||
b37ad28b | 2313 | __be32 |
ca364317 BF |
2314 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
2315 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 2316 | struct nfsd4_open_downgrade *od) |
1da177e4 | 2317 | { |
b37ad28b | 2318 | __be32 status; |
1da177e4 LT |
2319 | struct nfs4_stateid *stp; |
2320 | unsigned int share_access; | |
2321 | ||
2322 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
2323 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2324 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2325 | |
ba5a6a19 BF |
2326 | if (!access_valid(od->od_share_access) |
2327 | || !deny_valid(od->od_share_deny)) | |
1da177e4 LT |
2328 | return nfserr_inval; |
2329 | ||
2330 | nfs4_lock_state(); | |
ca364317 BF |
2331 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2332 | od->od_seqid, | |
1da177e4 | 2333 | &od->od_stateid, |
f3362737 | 2334 | OPEN_STATE, |
1da177e4 LT |
2335 | &od->od_stateowner, &stp, NULL))) |
2336 | goto out; | |
2337 | ||
2338 | status = nfserr_inval; | |
2339 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
2340 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
2341 | stp->st_access_bmap, od->od_share_access); | |
2342 | goto out; | |
2343 | } | |
2344 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
2345 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
2346 | stp->st_deny_bmap, od->od_share_deny); | |
2347 | goto out; | |
2348 | } | |
2349 | set_access(&share_access, stp->st_access_bmap); | |
2350 | nfs4_file_downgrade(stp->st_vfs_file, | |
2351 | share_access & ~od->od_share_access); | |
2352 | ||
2353 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
2354 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
2355 | ||
2356 | update_stateid(&stp->st_stateid); | |
2357 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2358 | status = nfs_ok; | |
2359 | out: | |
f2327d9a | 2360 | if (od->od_stateowner) { |
1da177e4 | 2361 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 2362 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 2363 | } |
1da177e4 LT |
2364 | nfs4_unlock_state(); |
2365 | return status; | |
2366 | } | |
2367 | ||
2368 | /* | |
2369 | * nfs4_unlock_state() called after encode | |
2370 | */ | |
b37ad28b | 2371 | __be32 |
ca364317 | 2372 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2373 | struct nfsd4_close *close) |
1da177e4 | 2374 | { |
b37ad28b | 2375 | __be32 status; |
1da177e4 LT |
2376 | struct nfs4_stateid *stp; |
2377 | ||
2378 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
2379 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2380 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
2381 | |
2382 | nfs4_lock_state(); | |
2383 | /* check close_lru for replay */ | |
ca364317 BF |
2384 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
2385 | close->cl_seqid, | |
1da177e4 | 2386 | &close->cl_stateid, |
f3362737 | 2387 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
2388 | &close->cl_stateowner, &stp, NULL))) |
2389 | goto out; | |
1da177e4 LT |
2390 | status = nfs_ok; |
2391 | update_stateid(&stp->st_stateid); | |
2392 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2393 | ||
04ef5954 | 2394 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 2395 | release_open_stateid(stp); |
04ef5954 BF |
2396 | |
2397 | /* place unused nfs4_stateowners on so_close_lru list to be | |
2398 | * released by the laundromat service after the lease period | |
2399 | * to enable us to handle CLOSE replay | |
2400 | */ | |
2401 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
2402 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 2403 | out: |
f2327d9a | 2404 | if (close->cl_stateowner) { |
1da177e4 | 2405 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 2406 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 2407 | } |
1da177e4 LT |
2408 | nfs4_unlock_state(); |
2409 | return status; | |
2410 | } | |
2411 | ||
b37ad28b | 2412 | __be32 |
ca364317 BF |
2413 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2414 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 2415 | { |
b37ad28b | 2416 | __be32 status; |
1da177e4 | 2417 | |
ca364317 | 2418 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
1da177e4 LT |
2419 | goto out; |
2420 | ||
2421 | nfs4_lock_state(); | |
ca364317 BF |
2422 | status = nfs4_preprocess_stateid_op(&cstate->current_fh, |
2423 | &dr->dr_stateid, DELEG_RET, NULL); | |
1da177e4 LT |
2424 | nfs4_unlock_state(); |
2425 | out: | |
2426 | return status; | |
2427 | } | |
2428 | ||
2429 | ||
2430 | /* | |
2431 | * Lock owner state (byte-range locks) | |
2432 | */ | |
2433 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
2434 | #define LOCK_HASH_BITS 8 | |
2435 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
2436 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
2437 | ||
87df4de8 BH |
2438 | static inline u64 |
2439 | end_offset(u64 start, u64 len) | |
2440 | { | |
2441 | u64 end; | |
2442 | ||
2443 | end = start + len; | |
2444 | return end >= start ? end: NFS4_MAX_UINT64; | |
2445 | } | |
2446 | ||
2447 | /* last octet in a range */ | |
2448 | static inline u64 | |
2449 | last_byte_offset(u64 start, u64 len) | |
2450 | { | |
2451 | u64 end; | |
2452 | ||
2453 | BUG_ON(!len); | |
2454 | end = start + len; | |
2455 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
2456 | } | |
2457 | ||
1da177e4 LT |
2458 | #define lockownerid_hashval(id) \ |
2459 | ((id) & LOCK_HASH_MASK) | |
2460 | ||
2461 | static inline unsigned int | |
2462 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
2463 | struct xdr_netobj *ownername) | |
2464 | { | |
2465 | return (file_hashval(inode) + cl_id | |
2466 | + opaque_hashval(ownername->data, ownername->len)) | |
2467 | & LOCK_HASH_MASK; | |
2468 | } | |
2469 | ||
2470 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
2471 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
2472 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
2473 | ||
fd39ca9a | 2474 | static struct nfs4_stateid * |
1da177e4 LT |
2475 | find_stateid(stateid_t *stid, int flags) |
2476 | { | |
9346eff0 | 2477 | struct nfs4_stateid *local; |
1da177e4 LT |
2478 | u32 st_id = stid->si_stateownerid; |
2479 | u32 f_id = stid->si_fileid; | |
2480 | unsigned int hashval; | |
2481 | ||
2482 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 2483 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
2484 | hashval = stateid_hashval(st_id, f_id); |
2485 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
2486 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2487 | (local->st_stateid.si_fileid == f_id)) | |
2488 | return local; | |
2489 | } | |
2490 | } | |
9346eff0 KK |
2491 | |
2492 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
2493 | hashval = stateid_hashval(st_id, f_id); |
2494 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
2495 | if ((local->st_stateid.si_stateownerid == st_id) && | |
2496 | (local->st_stateid.si_fileid == f_id)) | |
2497 | return local; | |
2498 | } | |
849823c5 | 2499 | } |
1da177e4 LT |
2500 | return NULL; |
2501 | } | |
2502 | ||
2503 | static struct nfs4_delegation * | |
2504 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
2505 | { | |
13cd2184 N |
2506 | struct nfs4_file *fp; |
2507 | struct nfs4_delegation *dl; | |
1da177e4 LT |
2508 | |
2509 | dprintk("NFSD:find_delegation_stateid stateid=(%08x/%08x/%08x/%08x)\n", | |
2510 | stid->si_boot, stid->si_stateownerid, | |
2511 | stid->si_fileid, stid->si_generation); | |
2512 | ||
1da177e4 | 2513 | fp = find_file(ino); |
13cd2184 N |
2514 | if (!fp) |
2515 | return NULL; | |
2516 | dl = find_delegation_file(fp, stid); | |
2517 | put_nfs4_file(fp); | |
2518 | return dl; | |
1da177e4 LT |
2519 | } |
2520 | ||
2521 | /* | |
2522 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
2523 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
2524 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
2525 | * locking, this prevents us from being completely protocol-compliant. The | |
2526 | * real solution to this problem is to start using unsigned file offsets in | |
2527 | * the VFS, but this is a very deep change! | |
2528 | */ | |
2529 | static inline void | |
2530 | nfs4_transform_lock_offset(struct file_lock *lock) | |
2531 | { | |
2532 | if (lock->fl_start < 0) | |
2533 | lock->fl_start = OFFSET_MAX; | |
2534 | if (lock->fl_end < 0) | |
2535 | lock->fl_end = OFFSET_MAX; | |
2536 | } | |
2537 | ||
d5b9026a N |
2538 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
2539 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
e465a77f | 2540 | static struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 2541 | }; |
1da177e4 LT |
2542 | |
2543 | static inline void | |
2544 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
2545 | { | |
d5b9026a N |
2546 | struct nfs4_stateowner *sop; |
2547 | unsigned int hval; | |
1da177e4 | 2548 | |
d5b9026a N |
2549 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
2550 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
2551 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
2552 | kref_get(&sop->so_ref); |
2553 | deny->ld_sop = sop; | |
2554 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
2555 | } else { |
2556 | deny->ld_sop = NULL; | |
2557 | deny->ld_clientid.cl_boot = 0; | |
2558 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
2559 | } |
2560 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
2561 | deny->ld_length = NFS4_MAX_UINT64; |
2562 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
2563 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
2564 | deny->ld_type = NFS4_READ_LT; | |
2565 | if (fl->fl_type != F_RDLCK) | |
2566 | deny->ld_type = NFS4_WRITE_LT; | |
2567 | } | |
2568 | ||
1da177e4 LT |
2569 | static struct nfs4_stateowner * |
2570 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
2571 | struct xdr_netobj *owner) | |
2572 | { | |
2573 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
2574 | struct nfs4_stateowner *op; | |
2575 | ||
2576 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 2577 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
2578 | return op; |
2579 | } | |
2580 | return NULL; | |
2581 | } | |
2582 | ||
2583 | /* | |
2584 | * Alloc a lock owner structure. | |
2585 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
2586 | * occured. | |
2587 | * | |
2588 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
2589 | */ |
2590 | ||
2591 | static struct nfs4_stateowner * | |
2592 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
2593 | struct nfs4_stateowner *sop; | |
2594 | struct nfs4_replay *rp; | |
2595 | unsigned int idhashval; | |
2596 | ||
2597 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
2598 | return NULL; | |
2599 | idhashval = lockownerid_hashval(current_ownerid); | |
2600 | INIT_LIST_HEAD(&sop->so_idhash); | |
2601 | INIT_LIST_HEAD(&sop->so_strhash); | |
2602 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
2603 | INIT_LIST_HEAD(&sop->so_stateids); |
2604 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
2605 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
2606 | sop->so_time = 0; | |
2607 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
2608 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 2609 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
2610 | sop->so_is_open_owner = 0; |
2611 | sop->so_id = current_ownerid++; | |
2612 | sop->so_client = clp; | |
b59e3c0e NB |
2613 | /* It is the openowner seqid that will be incremented in encode in the |
2614 | * case of new lockowners; so increment the lock seqid manually: */ | |
2615 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
2616 | sop->so_confirmed = 1; |
2617 | rp = &sop->so_replay; | |
de1ae286 | 2618 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
2619 | rp->rp_buflen = 0; |
2620 | rp->rp_buf = rp->rp_ibuf; | |
2621 | return sop; | |
2622 | } | |
2623 | ||
fd39ca9a | 2624 | static struct nfs4_stateid * |
1da177e4 LT |
2625 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
2626 | { | |
2627 | struct nfs4_stateid *stp; | |
2628 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
2629 | ||
5ac049ac N |
2630 | stp = nfs4_alloc_stateid(); |
2631 | if (stp == NULL) | |
1da177e4 LT |
2632 | goto out; |
2633 | INIT_LIST_HEAD(&stp->st_hash); | |
2634 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
2635 | INIT_LIST_HEAD(&stp->st_perstateowner); |
2636 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 2637 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 2638 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 2639 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 2640 | stp->st_stateowner = sop; |
13cd2184 | 2641 | get_nfs4_file(fp); |
1da177e4 LT |
2642 | stp->st_file = fp; |
2643 | stp->st_stateid.si_boot = boot_time; | |
2644 | stp->st_stateid.si_stateownerid = sop->so_id; | |
2645 | stp->st_stateid.si_fileid = fp->fi_id; | |
2646 | stp->st_stateid.si_generation = 0; | |
2647 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
2648 | stp->st_access_bmap = open_stp->st_access_bmap; | |
2649 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 2650 | stp->st_openstp = open_stp; |
1da177e4 LT |
2651 | |
2652 | out: | |
2653 | return stp; | |
2654 | } | |
2655 | ||
fd39ca9a | 2656 | static int |
1da177e4 LT |
2657 | check_lock_length(u64 offset, u64 length) |
2658 | { | |
87df4de8 | 2659 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
2660 | LOFF_OVERFLOW(offset, length))); |
2661 | } | |
2662 | ||
2663 | /* | |
2664 | * LOCK operation | |
2665 | */ | |
b37ad28b | 2666 | __be32 |
ca364317 | 2667 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2668 | struct nfsd4_lock *lock) |
1da177e4 | 2669 | { |
3e9e3dbe | 2670 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 2671 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
2672 | struct nfs4_stateid *lock_stp; |
2673 | struct file *filp; | |
2674 | struct file_lock file_lock; | |
8dc7c311 | 2675 | struct file_lock conflock; |
b37ad28b | 2676 | __be32 status = 0; |
1da177e4 | 2677 | unsigned int strhashval; |
150b3934 | 2678 | unsigned int cmd; |
b8dd7b9a | 2679 | int err; |
1da177e4 LT |
2680 | |
2681 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
2682 | (long long) lock->lk_offset, | |
2683 | (long long) lock->lk_length); | |
2684 | ||
1da177e4 LT |
2685 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
2686 | return nfserr_inval; | |
2687 | ||
ca364317 | 2688 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 2689 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
2690 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
2691 | return status; | |
2692 | } | |
2693 | ||
1da177e4 LT |
2694 | nfs4_lock_state(); |
2695 | ||
2696 | if (lock->lk_is_new) { | |
893f8770 N |
2697 | /* |
2698 | * Client indicates that this is a new lockowner. | |
2699 | * Use open owner and open stateid to create lock owner and | |
2700 | * lock stateid. | |
2701 | */ | |
1da177e4 LT |
2702 | struct nfs4_stateid *open_stp = NULL; |
2703 | struct nfs4_file *fp; | |
2704 | ||
2705 | status = nfserr_stale_clientid; | |
849823c5 | 2706 | if (STALE_CLIENTID(&lock->lk_new_clientid)) |
1da177e4 | 2707 | goto out; |
1da177e4 | 2708 | |
1da177e4 | 2709 | /* validate and update open stateid and open seqid */ |
ca364317 | 2710 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2711 | lock->lk_new_open_seqid, |
2712 | &lock->lk_new_open_stateid, | |
f3362737 | 2713 | OPEN_STATE, |
3a65588a | 2714 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 2715 | lock); |
37515177 | 2716 | if (status) |
1da177e4 | 2717 | goto out; |
3a65588a | 2718 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
2719 | /* create lockowner and lock stateid */ |
2720 | fp = open_stp->st_file; | |
2721 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
2722 | open_sop->so_client->cl_clientid.cl_id, | |
2723 | &lock->v.new.owner); | |
3e9e3dbe N |
2724 | /* XXX: Do we need to check for duplicate stateowners on |
2725 | * the same file, or should they just be allowed (and | |
2726 | * create new stateids)? */ | |
1da177e4 | 2727 | status = nfserr_resource; |
b59e3c0e NB |
2728 | lock_sop = alloc_init_lock_stateowner(strhashval, |
2729 | open_sop->so_client, open_stp, lock); | |
2730 | if (lock_sop == NULL) | |
1da177e4 | 2731 | goto out; |
b59e3c0e | 2732 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 2733 | if (lock_stp == NULL) |
1da177e4 | 2734 | goto out; |
1da177e4 LT |
2735 | } else { |
2736 | /* lock (lock owner + lock stateid) already exists */ | |
ca364317 | 2737 | status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2738 | lock->lk_old_lock_seqid, |
2739 | &lock->lk_old_lock_stateid, | |
f3362737 | 2740 | LOCK_STATE, |
3a65588a | 2741 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
2742 | if (status) |
2743 | goto out; | |
3a65588a | 2744 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 2745 | } |
3a65588a | 2746 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
2747 | filp = lock_stp->st_vfs_file; |
2748 | ||
0dd395dc | 2749 | status = nfserr_grace; |
af558e33 | 2750 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
2751 | goto out; |
2752 | status = nfserr_no_grace; | |
af558e33 | 2753 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
2754 | goto out; |
2755 | ||
1da177e4 LT |
2756 | locks_init_lock(&file_lock); |
2757 | switch (lock->lk_type) { | |
2758 | case NFS4_READ_LT: | |
2759 | case NFS4_READW_LT: | |
2760 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 2761 | cmd = F_SETLK; |
1da177e4 LT |
2762 | break; |
2763 | case NFS4_WRITE_LT: | |
2764 | case NFS4_WRITEW_LT: | |
2765 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 2766 | cmd = F_SETLK; |
1da177e4 LT |
2767 | break; |
2768 | default: | |
2769 | status = nfserr_inval; | |
2770 | goto out; | |
2771 | } | |
b59e3c0e | 2772 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
2773 | file_lock.fl_pid = current->tgid; |
2774 | file_lock.fl_file = filp; | |
2775 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2776 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2777 | |
2778 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 2779 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
2780 | nfs4_transform_lock_offset(&file_lock); |
2781 | ||
2782 | /* | |
2783 | * Try to lock the file in the VFS. | |
2784 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
2785 | */ | |
2786 | ||
fd85b817 | 2787 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 2788 | switch (-err) { |
1da177e4 LT |
2789 | case 0: /* success! */ |
2790 | update_stateid(&lock_stp->st_stateid); | |
2791 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
2792 | sizeof(stateid_t)); | |
b8dd7b9a | 2793 | status = 0; |
eb76b3fd AA |
2794 | break; |
2795 | case (EAGAIN): /* conflock holds conflicting lock */ | |
2796 | status = nfserr_denied; | |
2797 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
2798 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
2799 | break; | |
1da177e4 LT |
2800 | case (EDEADLK): |
2801 | status = nfserr_deadlock; | |
eb76b3fd | 2802 | break; |
1da177e4 | 2803 | default: |
fd85b817 | 2804 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
2805 | status = nfserr_resource; |
2806 | break; | |
1da177e4 | 2807 | } |
1da177e4 | 2808 | out: |
8a280510 | 2809 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 2810 | release_lockowner(lock_sop); |
3a65588a BF |
2811 | if (lock->lk_replay_owner) { |
2812 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 2813 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 2814 | } |
1da177e4 LT |
2815 | nfs4_unlock_state(); |
2816 | return status; | |
2817 | } | |
2818 | ||
55ef1274 BF |
2819 | /* |
2820 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
2821 | * so we do a temporary open here just to get an open file to pass to | |
2822 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
2823 | * inode operation.) | |
2824 | */ | |
2825 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
2826 | { | |
2827 | struct file *file; | |
2828 | int err; | |
2829 | ||
2830 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
2831 | if (err) | |
2832 | return err; | |
2833 | err = vfs_test_lock(file, lock); | |
2834 | nfsd_close(file); | |
2835 | return err; | |
2836 | } | |
2837 | ||
1da177e4 LT |
2838 | /* |
2839 | * LOCKT operation | |
2840 | */ | |
b37ad28b | 2841 | __be32 |
ca364317 BF |
2842 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2843 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
2844 | { |
2845 | struct inode *inode; | |
1da177e4 | 2846 | struct file_lock file_lock; |
fd85b817 | 2847 | int error; |
b37ad28b | 2848 | __be32 status; |
1da177e4 | 2849 | |
af558e33 | 2850 | if (locks_in_grace()) |
1da177e4 LT |
2851 | return nfserr_grace; |
2852 | ||
2853 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
2854 | return nfserr_inval; | |
2855 | ||
2856 | lockt->lt_stateowner = NULL; | |
2857 | nfs4_lock_state(); | |
2858 | ||
2859 | status = nfserr_stale_clientid; | |
849823c5 | 2860 | if (STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 2861 | goto out; |
1da177e4 | 2862 | |
ca364317 | 2863 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 2864 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
2865 | if (status == nfserr_symlink) |
2866 | status = nfserr_inval; | |
2867 | goto out; | |
2868 | } | |
2869 | ||
ca364317 | 2870 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
2871 | locks_init_lock(&file_lock); |
2872 | switch (lockt->lt_type) { | |
2873 | case NFS4_READ_LT: | |
2874 | case NFS4_READW_LT: | |
2875 | file_lock.fl_type = F_RDLCK; | |
2876 | break; | |
2877 | case NFS4_WRITE_LT: | |
2878 | case NFS4_WRITEW_LT: | |
2879 | file_lock.fl_type = F_WRLCK; | |
2880 | break; | |
2881 | default: | |
2fdada03 | 2882 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
2883 | status = nfserr_inval; |
2884 | goto out; | |
2885 | } | |
2886 | ||
2887 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
2888 | &lockt->lt_clientid, &lockt->lt_owner); | |
2889 | if (lockt->lt_stateowner) | |
2890 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
2891 | file_lock.fl_pid = current->tgid; | |
2892 | file_lock.fl_flags = FL_POSIX; | |
2893 | ||
2894 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 2895 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
2896 | |
2897 | nfs4_transform_lock_offset(&file_lock); | |
2898 | ||
1da177e4 | 2899 | status = nfs_ok; |
55ef1274 | 2900 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
2901 | if (error) { |
2902 | status = nfserrno(error); | |
2903 | goto out; | |
2904 | } | |
9d6a8c5c | 2905 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 2906 | status = nfserr_denied; |
9d6a8c5c | 2907 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
2908 | } |
2909 | out: | |
2910 | nfs4_unlock_state(); | |
2911 | return status; | |
2912 | } | |
2913 | ||
b37ad28b | 2914 | __be32 |
ca364317 | 2915 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2916 | struct nfsd4_locku *locku) |
1da177e4 LT |
2917 | { |
2918 | struct nfs4_stateid *stp; | |
2919 | struct file *filp = NULL; | |
2920 | struct file_lock file_lock; | |
b37ad28b | 2921 | __be32 status; |
b8dd7b9a | 2922 | int err; |
1da177e4 LT |
2923 | |
2924 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
2925 | (long long) locku->lu_offset, | |
2926 | (long long) locku->lu_length); | |
2927 | ||
2928 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
2929 | return nfserr_inval; | |
2930 | ||
2931 | nfs4_lock_state(); | |
2932 | ||
ca364317 | 2933 | if ((status = nfs4_preprocess_seqid_op(&cstate->current_fh, |
1da177e4 LT |
2934 | locku->lu_seqid, |
2935 | &locku->lu_stateid, | |
f3362737 | 2936 | LOCK_STATE, |
1da177e4 LT |
2937 | &locku->lu_stateowner, &stp, NULL))) |
2938 | goto out; | |
2939 | ||
2940 | filp = stp->st_vfs_file; | |
2941 | BUG_ON(!filp); | |
2942 | locks_init_lock(&file_lock); | |
2943 | file_lock.fl_type = F_UNLCK; | |
2944 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
2945 | file_lock.fl_pid = current->tgid; | |
2946 | file_lock.fl_file = filp; | |
2947 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 2948 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
2949 | file_lock.fl_start = locku->lu_offset; |
2950 | ||
87df4de8 | 2951 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
2952 | nfs4_transform_lock_offset(&file_lock); |
2953 | ||
2954 | /* | |
2955 | * Try to unlock the file in the VFS. | |
2956 | */ | |
fd85b817 | 2957 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 2958 | if (err) { |
fd85b817 | 2959 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
2960 | goto out_nfserr; |
2961 | } | |
2962 | /* | |
2963 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
2964 | */ | |
2965 | update_stateid(&stp->st_stateid); | |
2966 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2967 | ||
2968 | out: | |
f2327d9a | 2969 | if (locku->lu_stateowner) { |
1da177e4 | 2970 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 2971 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 2972 | } |
1da177e4 LT |
2973 | nfs4_unlock_state(); |
2974 | return status; | |
2975 | ||
2976 | out_nfserr: | |
b8dd7b9a | 2977 | status = nfserrno(err); |
1da177e4 LT |
2978 | goto out; |
2979 | } | |
2980 | ||
2981 | /* | |
2982 | * returns | |
2983 | * 1: locks held by lockowner | |
2984 | * 0: no locks held by lockowner | |
2985 | */ | |
2986 | static int | |
2987 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
2988 | { | |
2989 | struct file_lock **flpp; | |
7eaa36e2 | 2990 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
2991 | int status = 0; |
2992 | ||
2993 | lock_kernel(); | |
2994 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 2995 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
2996 | status = 1; |
2997 | goto out; | |
796dadfd | 2998 | } |
1da177e4 LT |
2999 | } |
3000 | out: | |
3001 | unlock_kernel(); | |
3002 | return status; | |
3003 | } | |
3004 | ||
b37ad28b | 3005 | __be32 |
b591480b BF |
3006 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3007 | struct nfsd4_compound_state *cstate, | |
3008 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3009 | { |
3010 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3011 | struct nfs4_stateowner *sop; |
3012 | struct nfs4_stateid *stp; | |
1da177e4 | 3013 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3014 | struct list_head matches; |
3015 | int i; | |
b37ad28b | 3016 | __be32 status; |
1da177e4 LT |
3017 | |
3018 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3019 | clid->cl_boot, clid->cl_id); | |
3020 | ||
3021 | /* XXX check for lease expiration */ | |
3022 | ||
3023 | status = nfserr_stale_clientid; | |
849823c5 | 3024 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3025 | return status; |
1da177e4 LT |
3026 | |
3027 | nfs4_lock_state(); | |
3028 | ||
3e9e3dbe N |
3029 | status = nfserr_locks_held; |
3030 | /* XXX: we're doing a linear search through all the lockowners. | |
3031 | * Yipes! For now we'll just hope clients aren't really using | |
3032 | * release_lockowner much, but eventually we have to fix these | |
3033 | * data structures. */ | |
3034 | INIT_LIST_HEAD(&matches); | |
3035 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3036 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3037 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3038 | continue; |
3039 | list_for_each_entry(stp, &sop->so_stateids, | |
3040 | st_perstateowner) { | |
3041 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3042 | goto out; | |
3043 | /* Note: so_perclient unused for lockowners, | |
3044 | * so it's OK to fool with here. */ | |
3045 | list_add(&sop->so_perclient, &matches); | |
3046 | } | |
1da177e4 | 3047 | } |
3e9e3dbe N |
3048 | } |
3049 | /* Clients probably won't expect us to return with some (but not all) | |
3050 | * of the lockowner state released; so don't release any until all | |
3051 | * have been checked. */ | |
3052 | status = nfs_ok; | |
0fa822e4 N |
3053 | while (!list_empty(&matches)) { |
3054 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3055 | so_perclient); | |
3056 | /* unhash_stateowner deletes so_perclient only | |
3057 | * for openowners. */ | |
3058 | list_del(&sop->so_perclient); | |
f044ff83 | 3059 | release_lockowner(sop); |
1da177e4 LT |
3060 | } |
3061 | out: | |
3062 | nfs4_unlock_state(); | |
3063 | return status; | |
3064 | } | |
3065 | ||
3066 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3067 | alloc_reclaim(void) |
1da177e4 | 3068 | { |
a55370a3 | 3069 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3070 | } |
3071 | ||
c7b9a459 N |
3072 | int |
3073 | nfs4_has_reclaimed_state(const char *name) | |
3074 | { | |
3075 | unsigned int strhashval = clientstr_hashval(name); | |
3076 | struct nfs4_client *clp; | |
3077 | ||
3078 | clp = find_confirmed_client_by_str(name, strhashval); | |
3079 | return clp ? 1 : 0; | |
3080 | } | |
3081 | ||
1da177e4 LT |
3082 | /* |
3083 | * failure => all reset bets are off, nfserr_no_grace... | |
3084 | */ | |
190e4fbf N |
3085 | int |
3086 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3087 | { |
3088 | unsigned int strhashval; | |
3089 | struct nfs4_client_reclaim *crp = NULL; | |
3090 | ||
a55370a3 N |
3091 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3092 | crp = alloc_reclaim(); | |
1da177e4 LT |
3093 | if (!crp) |
3094 | return 0; | |
a55370a3 | 3095 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3096 | INIT_LIST_HEAD(&crp->cr_strhash); |
3097 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3098 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3099 | reclaim_str_hashtbl_size++; |
3100 | return 1; | |
3101 | } | |
3102 | ||
3103 | static void | |
3104 | nfs4_release_reclaim(void) | |
3105 | { | |
3106 | struct nfs4_client_reclaim *crp = NULL; | |
3107 | int i; | |
3108 | ||
1da177e4 LT |
3109 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3110 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3111 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3112 | struct nfs4_client_reclaim, cr_strhash); | |
3113 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3114 | kfree(crp); |
3115 | reclaim_str_hashtbl_size--; | |
3116 | } | |
3117 | } | |
3118 | BUG_ON(reclaim_str_hashtbl_size); | |
3119 | } | |
3120 | ||
3121 | /* | |
3122 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3123 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3124 | nfs4_find_reclaim_client(clientid_t *clid) |
3125 | { | |
3126 | unsigned int strhashval; | |
3127 | struct nfs4_client *clp; | |
3128 | struct nfs4_client_reclaim *crp = NULL; | |
3129 | ||
3130 | ||
3131 | /* find clientid in conf_id_hashtbl */ | |
3132 | clp = find_confirmed_client(clid); | |
3133 | if (clp == NULL) | |
3134 | return NULL; | |
3135 | ||
a55370a3 N |
3136 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3137 | clp->cl_name.len, clp->cl_name.data, | |
3138 | clp->cl_recdir); | |
1da177e4 LT |
3139 | |
3140 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3141 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3142 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3143 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3144 | return crp; |
3145 | } | |
3146 | } | |
3147 | return NULL; | |
3148 | } | |
3149 | ||
3150 | /* | |
3151 | * Called from OPEN. Look for clientid in reclaim list. | |
3152 | */ | |
b37ad28b | 3153 | __be32 |
1da177e4 LT |
3154 | nfs4_check_open_reclaim(clientid_t *clid) |
3155 | { | |
dfc83565 | 3156 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3157 | } |
3158 | ||
ac4d8ff2 | 3159 | /* initialization to perform at module load time: */ |
1da177e4 | 3160 | |
e8ff2a84 | 3161 | int |
ac4d8ff2 | 3162 | nfs4_state_init(void) |
1da177e4 | 3163 | { |
e8ff2a84 | 3164 | int i, status; |
1da177e4 | 3165 | |
e8ff2a84 BF |
3166 | status = nfsd4_init_slabs(); |
3167 | if (status) | |
3168 | return status; | |
1da177e4 LT |
3169 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3170 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3171 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3172 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3173 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
3174 | } | |
3175 | for (i = 0; i < FILE_HASH_SIZE; i++) { | |
3176 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3177 | } | |
3178 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3179 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3180 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3181 | } | |
3182 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3183 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3184 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3185 | } | |
3186 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3187 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3188 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3189 | } | |
1da177e4 | 3190 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3191 | INIT_LIST_HEAD(&close_lru); |
3192 | INIT_LIST_HEAD(&client_lru); | |
3193 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 N |
3194 | for (i = 0; i < CLIENT_HASH_SIZE; i++) |
3195 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); | |
3196 | reclaim_str_hashtbl_size = 0; | |
e8ff2a84 | 3197 | return 0; |
ac4d8ff2 N |
3198 | } |
3199 | ||
190e4fbf N |
3200 | static void |
3201 | nfsd4_load_reboot_recovery_data(void) | |
3202 | { | |
3203 | int status; | |
3204 | ||
0964a3d3 N |
3205 | nfs4_lock_state(); |
3206 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3207 | status = nfsd4_recdir_load(); |
0964a3d3 | 3208 | nfs4_unlock_state(); |
190e4fbf N |
3209 | if (status) |
3210 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3211 | } | |
3212 | ||
9a8db97e ME |
3213 | unsigned long |
3214 | get_nfs4_grace_period(void) | |
3215 | { | |
3216 | return max(user_lease_time, lease_time) * HZ; | |
3217 | } | |
3218 | ||
c2f1a551 MS |
3219 | /* |
3220 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3221 | * client may quite reasonably hang on to a delegation as long as it has | |
3222 | * the inode cached. This becomes an obvious problem the first time a | |
3223 | * client's inode cache approaches the size of the server's total memory. | |
3224 | * | |
3225 | * For now we avoid this problem by imposing a hard limit on the number | |
3226 | * of delegations, which varies according to the server's memory size. | |
3227 | */ | |
3228 | static void | |
3229 | set_max_delegations(void) | |
3230 | { | |
3231 | /* | |
3232 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3233 | * estimates suggest that in the worst case (where every delegation | |
3234 | * is for a different inode), a delegation could take about 1.5K, | |
3235 | * giving a worst case usage of about 6% of memory. | |
3236 | */ | |
3237 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3238 | } | |
3239 | ||
ac4d8ff2 N |
3240 | /* initialization to perform when the nfsd service is started: */ |
3241 | ||
3242 | static void | |
3243 | __nfs4_state_start(void) | |
3244 | { | |
9a8db97e | 3245 | unsigned long grace_time; |
ac4d8ff2 | 3246 | |
1da177e4 | 3247 | boot_time = get_seconds(); |
af558e33 | 3248 | grace_time = get_nfs4_grace_period(); |
d99a05ad | 3249 | lease_time = user_lease_time; |
af558e33 | 3250 | locks_start_grace(&nfsd4_manager); |
9a8db97e ME |
3251 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
3252 | grace_time/HZ); | |
58da282b | 3253 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
9a8db97e | 3254 | queue_delayed_work(laundry_wq, &laundromat_work, grace_time); |
c2f1a551 | 3255 | set_max_delegations(); |
1da177e4 LT |
3256 | } |
3257 | ||
e8ff2a84 | 3258 | void |
76a3550e | 3259 | nfs4_state_start(void) |
1da177e4 | 3260 | { |
1da177e4 | 3261 | if (nfs4_init) |
e8ff2a84 | 3262 | return; |
190e4fbf | 3263 | nfsd4_load_reboot_recovery_data(); |
76a3550e | 3264 | __nfs4_state_start(); |
1da177e4 | 3265 | nfs4_init = 1; |
e8ff2a84 | 3266 | return; |
1da177e4 LT |
3267 | } |
3268 | ||
1da177e4 LT |
3269 | time_t |
3270 | nfs4_lease_time(void) | |
3271 | { | |
3272 | return lease_time; | |
3273 | } | |
3274 | ||
3275 | static void | |
3276 | __nfs4_state_shutdown(void) | |
3277 | { | |
3278 | int i; | |
3279 | struct nfs4_client *clp = NULL; | |
3280 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
3281 | struct list_head *pos, *next, reaplist; |
3282 | ||
1da177e4 LT |
3283 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3284 | while (!list_empty(&conf_id_hashtbl[i])) { | |
3285 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
3286 | expire_client(clp); | |
3287 | } | |
3288 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
3289 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
3290 | expire_client(clp); | |
3291 | } | |
3292 | } | |
3293 | INIT_LIST_HEAD(&reaplist); | |
3294 | spin_lock(&recall_lock); | |
3295 | list_for_each_safe(pos, next, &del_recall_lru) { | |
3296 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3297 | list_move(&dp->dl_recall_lru, &reaplist); | |
3298 | } | |
3299 | spin_unlock(&recall_lock); | |
3300 | list_for_each_safe(pos, next, &reaplist) { | |
3301 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
3302 | list_del_init(&dp->dl_recall_lru); | |
3303 | unhash_delegation(dp); | |
3304 | } | |
3305 | ||
190e4fbf | 3306 | nfsd4_shutdown_recdir(); |
1da177e4 | 3307 | nfs4_init = 0; |
1da177e4 LT |
3308 | } |
3309 | ||
3310 | void | |
3311 | nfs4_state_shutdown(void) | |
3312 | { | |
5e8d5c29 N |
3313 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
3314 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 3315 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
3316 | nfs4_lock_state(); |
3317 | nfs4_release_reclaim(); | |
3318 | __nfs4_state_shutdown(); | |
1da177e4 LT |
3319 | nfs4_unlock_state(); |
3320 | } | |
3321 | ||
3dd98a3b JL |
3322 | /* |
3323 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
3324 | * accessed when nfsd is starting. | |
3325 | */ | |
0964a3d3 N |
3326 | static void |
3327 | nfs4_set_recdir(char *recdir) | |
3328 | { | |
0964a3d3 | 3329 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
3330 | } |
3331 | ||
3332 | /* | |
3333 | * Change the NFSv4 recovery directory to recdir. | |
3334 | */ | |
3335 | int | |
3336 | nfs4_reset_recoverydir(char *recdir) | |
3337 | { | |
3338 | int status; | |
a63bb996 | 3339 | struct path path; |
0964a3d3 | 3340 | |
a63bb996 | 3341 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
3342 | if (status) |
3343 | return status; | |
3344 | status = -ENOTDIR; | |
a63bb996 | 3345 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
3346 | nfs4_set_recdir(recdir); |
3347 | status = 0; | |
3348 | } | |
a63bb996 | 3349 | path_put(&path); |
0964a3d3 N |
3350 | return status; |
3351 | } | |
3352 | ||
3dd98a3b JL |
3353 | char * |
3354 | nfs4_recoverydir(void) | |
3355 | { | |
3356 | return user_recovery_dirname; | |
3357 | } | |
3358 | ||
1da177e4 LT |
3359 | /* |
3360 | * Called when leasetime is changed. | |
3361 | * | |
d99a05ad N |
3362 | * The only way the protocol gives us to handle on-the-fly lease changes is to |
3363 | * simulate a reboot. Instead of doing that, we just wait till the next time | |
3364 | * we start to register any changes in lease time. If the administrator | |
3365 | * really wants to change the lease time *now*, they can go ahead and bring | |
3366 | * nfsd down and then back up again after changing the lease time. | |
3dd98a3b JL |
3367 | * |
3368 | * user_lease_time is protected by nfsd_mutex since it's only really accessed | |
3369 | * when nfsd is starting | |
1da177e4 LT |
3370 | */ |
3371 | void | |
3372 | nfs4_reset_lease(time_t leasetime) | |
3373 | { | |
d99a05ad | 3374 | user_lease_time = leasetime; |
1da177e4 | 3375 | } |